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videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/distributed/rpc/agent_utils.h

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+#pragma once
+
+#include <torch/csrc/distributed/c10d/PrefixStore.hpp>
+#include <torch/csrc/distributed/rpc/utils.h>
+
+namespace torch {
+namespace distributed {
+namespace rpc {
+
+// All RPC peers should call into this function at the same time. Each peer
+// provides its own id and name, and this function uses the given Store to
+// gather global name-to-id mapping on all peers.
+TORCH_API std::unordered_map<std::string, worker_id_t> collectNames(
+    ::c10d::PrefixStore store,
+    const worker_id_t selfId,
+    const std::string& selfName,
+    const int worldSize);
+
+// Ranks in dynamic RPC groups will initially call into this to establish the
+// name-to-id mapping for the current peers in the group. The current rank will
+// put its own worker info in the store and discover all the ranks that came
+// before it. NOTE: This needs to be called with the Dynamic RPC group
+// membership management token held.
+TORCH_API std::unordered_map<std::string, worker_id_t> collectCurrentNames(
+    ::c10d::PrefixStore store,
+    const worker_id_t selfId,
+    const std::string& selfName);
+
+// Remove name frmo Store, used in dynamic RPC groups.
+// NOTE: This needs to be called with the Dynamic RPC group
+// membership management token held.
+TORCH_API void removeCurrentName(
+    ::c10d::PrefixStore store,
+    const worker_id_t selfId,
+    const std::string& selfName);
+
+// This performs a synchronization of all call counts by using store.
+// All RPC peers wait for others to join to exit at the same time.
+TORCH_API int syncCallCount(
+    ::c10d::PrefixStore store,
+    const int worldSize,
+    int activeCalls = 0);
+
+} // namespace rpc
+} // namespace distributed
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/distributed/rpc/python_resp.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <torch/csrc/distributed/rpc/rpc_command_base.h>
+#include <torch/csrc/distributed/rpc/types.h>
+
+namespace torch {
+namespace distributed {
+namespace rpc {
+
+// RPC call representing the response of a Python UDF over RPC.
+class TORCH_API PythonResp final : public RpcCommandBase {
+ public:
+  explicit PythonResp(SerializedPyObj&& serializedPyObj);
+
+  c10::intrusive_ptr<Message> toMessageImpl() && override;
+
+  static std::unique_ptr<PythonResp> fromMessage(const Message& message);
+
+  const SerializedPyObj& serializedPyObj() const;
+
+ private:
+  SerializedPyObj serializedPyObj_;
+};
+
+} // namespace rpc
+} // namespace distributed
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/distributed/rpc/request_callback.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <torch/csrc/distributed/rpc/message.h>
+
+namespace torch {
+namespace distributed {
+namespace rpc {
+
+// Functor which is invoked to process an RPC message. This is an abstract class
+// with some common functionality across all request handlers. Users need to
+// implement this interface to perform the actual business logic.
+class TORCH_API RequestCallback {
+ public:
+  // Invoke the callback.
+  c10::intrusive_ptr<JitFuture> operator()(
+      Message& request,
+      std::vector<c10::Stream> streams) const;
+
+  virtual ~RequestCallback() = default;
+
+ protected:
+  // RpcAgent implementation should invoke ``RequestCallback`` to process
+  // received requests. There is no restriction on the implementation's
+  // threading model. This function takes an rvalue reference of the Message
+  // object. It is expected to return the future to a response message or
+  // message containing an exception. Different rpc agent implementations are
+  // expected to ensure delivery of the response/exception based on their
+  // implementation specific mechanisms.
+  virtual c10::intrusive_ptr<JitFuture> processMessage(
+      Message& request,
+      std::vector<c10::Stream> streams) const = 0;
+};
+
+} // namespace rpc
+} // namespace distributed
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/distributed/rpc/request_callback_impl.h

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+#pragma once
+
+#include <torch/csrc/distributed/rpc/message.h>
+#include <torch/csrc/distributed/rpc/request_callback_no_python.h>
+#include <torch/csrc/distributed/rpc/rpc_command_base.h>
+#include <torch/csrc/jit/python/pybind.h>
+
+namespace torch {
+namespace distributed {
+namespace rpc {
+
+class TORCH_API RequestCallbackImpl : public RequestCallbackNoPython {
+ public:
+  std::unique_ptr<RpcCommandBase> deserializePythonRpcCommand(
+      std::unique_ptr<RpcCommandBase> rpc,
+      const MessageType& messageType) const override;
+
+  c10::intrusive_ptr<JitFuture> processPythonCall(
+      RpcCommandBase& rpc,
+      std::vector<c10::Stream> streams) const override;
+
+  c10::intrusive_ptr<JitFuture> processScriptCall(
+      RpcCommandBase& rpc,
+      std::vector<c10::Stream> streams) const override;
+
+  c10::intrusive_ptr<JitFuture> processScriptRemoteCall(
+      RpcCommandBase& rpc,
+      std::vector<c10::Stream> streams) const override;
+
+  c10::intrusive_ptr<JitFuture> processPythonRemoteCall(
+      RpcCommandBase& rpc,
+      std::vector<c10::Stream> streams) const override;
+
+  c10::intrusive_ptr<JitFuture> processPythonRRefFetchCall(
+      RpcCommandBase& rpc) const override;
+
+  void handleRRefDelete(c10::intrusive_ptr<RRef>& rref) const override;
+
+  c10::intrusive_ptr<JitFuture> processRpcWithErrors(
+      RpcCommandBase& rpc,
+      const MessageType& messageType,
+      std::vector<c10::Stream> streams) const override;
+
+  bool cudaAvailable() const override;
+
+  c10::intrusive_ptr<JitFuture> processRRefBackward(
+      RpcCommandBase& rpc) const override;
+
+  // Helpers to run user-defined functions, operators and other computations.
+
+  c10::intrusive_ptr<JitFuture> runJitFunction(
+      const c10::QualifiedName& name,
+      std::vector<at::IValue>& stack,
+      std::vector<c10::Stream> streams,
+      bool isAsyncExecution) const;
+
+  c10::intrusive_ptr<JitFuture> runPythonFunction(
+      const py::object& function,
+      std::vector<c10::Stream> streams,
+      bool isAsyncExecution) const;
+};
+
+} // namespace rpc
+} // namespace distributed
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/distributed/rpc/rpc.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <torch/csrc/python_headers.h>
+
+namespace torch {
+namespace distributed {
+namespace rpc {
+
+PyMethodDef* python_functions();
+
+} // namespace rpc
+} // namespace distributed
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/distributed/rpc/rpc_command_base.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <torch/csrc/distributed/rpc/message.h>
+#include <torch/csrc/distributed/rpc/types.h>
+
+namespace torch {
+namespace distributed {
+namespace rpc {
+
+// Base class for all RPC request and responses.
+class RpcCommandBase {
+ public:
+  // Need to override this to serialize the RPC. This should destructively
+  // create a message for the RPC (Hence the &&).
+  c10::intrusive_ptr<Message> toMessage() && {
+    JitRRefPickleGuard jitPickleGuard;
+    return std::move(*this).toMessageImpl();
+  }
+  virtual c10::intrusive_ptr<Message> toMessageImpl() && = 0;
+  virtual ~RpcCommandBase() = 0;
+};
+
+inline RpcCommandBase::~RpcCommandBase() = default;
+
+} // namespace rpc
+} // namespace distributed
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/distributed/rpc/rref_context.h

@@ -0,0 +1,339 @@
+#pragma once
+
+#include <c10/util/Optional.h>
+#include <torch/csrc/distributed/rpc/message.h>
+#include <torch/csrc/distributed/rpc/rpc_agent.h>
+#include <torch/csrc/distributed/rpc/rref_impl.h>
+#include <torch/csrc/distributed/rpc/types.h>
+#include <torch/csrc/distributed/rpc/utils.h>
+
+#include <atomic>
+
+namespace torch {
+namespace distributed {
+namespace rpc {
+
+namespace callback {
+// It's the callback for RemoteCall.
+void TORCH_API
+confirmPendingUser(const JitFuture& jitFuture, const ForkId& expectedForkId);
+
+// It's the callback for finishing creating owner rref, it returned deletedRRef,
+// so that the deletedRRef can be handled under GIL in python_functions.cpp if
+// deletedRRef contains python object.
+c10::intrusive_ptr<RRef> TORCH_API
+finishCreatingOwnerRRef(const JitFuture& jitFuture, const RRefId& rrefId);
+} // namespace callback
+
+// Manages RRef lifetime and keeps track of RRef forks.
+class TORCH_API RRefContext {
+ public:
+  static RRefContext& getInstance();
+  // NB: This method must be called before destructing RRefContext singleton.
+  // Similar to delForkOfOwner, this method returns a vector of OwnerRRefs that
+  // hold py::object. The call-site is also responsible for resetting those
+  // shared_ptr objects with a GIL. See comments at delForkOfOwner() for more
+  // details.
+  static std::vector<c10::intrusive_ptr<RRef>> destroyInstance(
+      bool ignoreRRefLeak = true);
+
+  static void handleException(const JitFuture& jitFuture);
+
+  // handle exception without throw ::c10::Error again
+  static void handleExceptionSilent(const JitFuture& jitFuture);
+
+  RRefContext(const RRefContext&) = delete;
+  RRefContext(RRefContext&& other) = delete;
+  void operator=(const RRefContext&) = delete;
+  RRefContext& operator=(RRefContext&& other) = delete;
+
+  ~RRefContext();
+
+  // get the worker id of the current worker
+  inline worker_id_t getWorkerId() const {
+    return agent_->getWorkerInfo().id_;
+  }
+
+  // get the worker name of the current worker
+  inline const std::string& getWorkerName() const {
+    return agent_->getWorkerInfo().name_;
+  }
+
+  //  generate a globally unique ID
+  inline GloballyUniqueId genGloballyUniqueId() {
+    return GloballyUniqueId(getWorkerId(), nextLocalId_++);
+  }
+
+  inline const std::shared_ptr<RpcAgent>& agent() const {
+    return agent_;
+  }
+
+  // create a ``UserRRef`` owned by the worker ``ownerId``
+  c10::intrusive_ptr<UserRRef> createUserRRef(
+      worker_id_t ownerId,
+      const TypePtr& type);
+
+  // Convert an RRefForkData into an RRef. This RRef could be user or owner.
+  // This RRef could have already existed before, or could be created in this
+  // method, we pass type here to validate or help the rref creation.
+  c10::intrusive_ptr<RRef> getOrCreateRRef(
+      const RRefForkData& rfd,
+      const TypePtr& type);
+
+  // Get the ``OwnerRRef`` of id ``rrefId``. If it does not exist, create a new
+  // one. This function is called in two places:
+  // 1. when processing ``rpc.remote()``, i.e., ``SCRIPT_REMOTE_CALL``
+  //    ``PYTHON_REMOTE_CALL``.
+  // 2. when unpickling ``OwnerRRef``.
+  // What's common in these two cases are, 1) the RRefId is already generated
+  // 2) the TypePtr is presented. So it can always create the ``OwnerRRef`` if
+  // it is not yet available.
+  c10::intrusive_ptr<OwnerRRef> getOrCreateOwnerRRef(
+      const RRefId& rrefId,
+      const TypePtr& type);
+
+  // Create an empty owner rref of type.
+  // This method is called to first time generate an ``OwnerRRef``, e.g.,
+  // 1) ``rpc.RRef(obj)``
+  // 2) create the ``OwnerRRef`` on `rpc.remote()` caller side.
+  // What's common in these two cases are, 1) the RRefId hasn't been generated
+  // 2) the TypePtr is presented.
+  c10::intrusive_ptr<OwnerRRef> createOwnerRRef(const TypePtr& type);
+
+  // Returns a Future of the OwnerRRef, which will be marked completed when
+  // ``OwnerRRef`` is created. This method is used when the TypePtr is not
+  // available, e.g., when processing to_here(). The forceCreated flag can be
+  // used to ensure that the rref is created on the owner, otherwise throw in
+  // cases where the user of this API expects this to return a completed future.
+  // Note that the return value is a intrusive_ptr to a c10::ivalue::Future that
+  // holds the RRef.
+  c10::intrusive_ptr<JitFuture> getOwnerRRef(
+      const RRefId& rrefId,
+      bool forceCreated = false);
+
+  // Adding the RRefId of an OwnerRRef into the forks_ map. This is useful when
+  // making a remote call to self, which as for now, still goes through serde
+  // and invokes request callback. In this case, the OwnerRRef has already been
+  // created on the send side, and we need to pass it to the receive side,
+  // instead of creating a new OwnerRRef. This is done by adding the OwnerRRef
+  // into owners_. However, that alone is not enough, as it could be deleted
+  // when all UserRRef die, which would then remove the OwnerRRef from owners_
+  // and this could happen before the self remote call finishes. To prevent
+  // that, this API adds the RRefId as a ForkId, which will then delete the
+  // ForkId when the self remote is done.
+  void addSelfAsFork(c10::intrusive_ptr<OwnerRRef>& rref);
+
+  // Register a fork of the ``OwnerRRef``, and inserts a intrusive_ptr of the
+  // ``OwnerRRef`` in a map to keep it alive.
+  void addForkOfOwner(const RRefId& rrefId, const ForkId& forkId);
+  // Performs the same function as addForkOfOwner but ignores duplicate
+  // requests. This idempotent function is used with RREF_FORK_REQUEST calls,
+  // whereas all other message types use the non-idempotent variant.
+  void addForkOfOwnerIfNotPresent(const RRefId& rrefId, const ForkId& forkId);
+  // Delete a fork of the ``OwnerRRef``. NB: this could trigger deletion on the
+  // IValue or py::object. For the later, this method will acquire GIL.
+  // NB: If this fork deletion triggered deleting OwnerRRef, this method will
+  // return a shared_ptr to the OwnerRRef, which is likely to be the last
+  // shared_ptr instance for it. Therefore, deleting this shared_ptr<OwnerRRef>
+  // will also trigger deleting the object it points to. If OwnerRRef holds a
+  // py::object, deleting it require GIL. The call site should guarded it with
+  // a GIL and reset the shared_ptr. The GIL-guarded deletion is intentionally
+  // left out of this function to avoid creating dependency on pybind.
+  c10::intrusive_ptr<RRef> delForkOfOwner(
+      const RRefId& rrefId,
+      const ForkId& forkId);
+
+  // Invoked when pickling an RRef to setup child/fork properly
+  RRefForkData prepareChildFork(const c10::intrusive_ptr<RRef>& rref);
+  // Invoked when unpickling an RRef to send RREF_FORK_REQUEST to owner and
+  // send RREF_CHILD_ACCEPT to the parent.
+  // NB: forkId is necessary here as the rref could be an OwnerRRef
+  void notifyOwnerAndParentOfFork(
+      const ForkId& forkId,
+      worker_id_t parent,
+      const c10::intrusive_ptr<RRef>& rref);
+
+  // When a UserRRef is forked to another worker (user or owner), it is added
+  // into pendingChildren_ to be held alive until it receives RREF_CHILD_ACCEPT
+  // from the child.
+  // NB: This is necessary for both user and owner child. As we do not have FIFO
+  // communication between workers, we need this strategy to make sure that all
+  // previously submitted rpc/remote calls are acked before sending out the
+  // RREF_USER_DELETE message. Otherwise, the OwnerRRef could be deleted too
+  // soon.
+  void addPendingChild(
+      const ForkId& forkId,
+      const c10::intrusive_ptr<RRef>& rref);
+  void delPendingChild(const ForkId& forkId);
+
+  // When a UserRRef is created, it is added into pendingUsers_ to be held alive
+  // until it receives RREF_USER_ACCEPT from the owner.
+  void addPendingUser(
+      const ForkId& forkId,
+      const c10::intrusive_ptr<RRef>& rref);
+  void delPendingUser(const ForkId& forkId);
+  void addConfirmedUser(
+      const ForkId& forkId,
+      const c10::intrusive_ptr<RRef>& rref);
+
+  // Retrieve a pending user given the fork ID. Throws if the user has already
+  // been confirmed (i.e. is no longer in the pendingUsers_ map).
+  c10::intrusive_ptr<RRef> getPendingUser(const ForkId& forkId);
+
+  // Start recording new pending UserRRefs. All pending UserRRefs introduced
+  // after this point will be put into the thread_local userTable_, which will
+  // then be consumed and cleared in waitForThreadLocalPendingRRefs().
+  void recordThreadLocalPendingRRefs();
+  // End recording new pending UserRRefs, and clear the thread_local userTable_.
+  // Returns a Future which will be marked as completed when all pending
+  // UserRRefs in the current userTable_ are confirmed by their owners. The bool
+  // value in the Future is unused.
+  // This method is useful to make sure RRefs in user function arguments are
+  // confirmed before launching user code.
+  // NB: Callers of this method does not need to keep the returned Future alive,
+  // because this Future is already captured in callbacks of the
+  // PendingUserState. If there is no pending UserRRefs, this method returns a
+  // completed future.
+  c10::intrusive_ptr<JitFuture> waitForThreadLocalPendingRRefs();
+  // Only call this function when there are errors during a recording session,
+  // and it is likely that waitForThreadLocalPendingRRefs() cannot be invoked
+  // properly.
+  // TODO: make this a context guard
+  void clearRecordedPendingRRefsOnError();
+
+  void delUser(
+      const worker_id_t owner,
+      const RRefId& rrefId,
+      const ForkId& forkId);
+  void delAllUsersAndUnforkedOwners(std::chrono::milliseconds timeoutMillis);
+
+  std::unordered_map<std::string, std::string> getDebugInfo();
+
+ private:
+  struct PendingUserState {
+    PendingUserState(c10::intrusive_ptr<RRef> rref)
+        : rref_(std::move(rref)),
+          confirmationFuture_(c10::make_intrusive<JitFuture>(BoolType::get())) {
+    }
+
+    inline void confirm() {
+      c10::static_intrusive_pointer_cast<UserRRef>(rref_)->confirm();
+      confirmationFuture_->markCompleted();
+    }
+
+    c10::intrusive_ptr<RRef> rref_;
+    // Use Future.wait() and Future.markCompleted() to block and unblock user
+    // functions. The bool value wrapped by the future_ is not used.
+    c10::intrusive_ptr<JitFuture> confirmationFuture_;
+  };
+
+  RRefContext(std::shared_ptr<RpcAgent>);
+
+  c10::intrusive_ptr<UserRRef> createUserRRef(
+      worker_id_t ownerId,
+      const RRefId& rrefId,
+      const ForkId& forkId,
+      const TypePtr& type);
+
+  void finishForkRequest(const ForkId& forkId, worker_id_t parent);
+
+  // If there is any leak on any RRef, this method will throw an error.
+  void checkRRefLeaks(bool ignoreRRefLeak);
+
+  static std::atomic<local_id_t> nextLocalId_;
+
+  const std::shared_ptr<RpcAgent> agent_;
+  mutable std::mutex mutex_;
+  // Keep OwnerRRefs alive until there is no living UserRRefs.
+  std::unordered_map<RRefId, c10::intrusive_ptr<RRef>, RRefId::Hash> owners_;
+  // A map to track OwnerRRefs that are requested but not yet created. This can
+  // happen if the to_here() message is processed on the owner before the
+  // corresponding creator rpc.remote() message. If this happens, instead of
+  // to_here() RPC thread to block waiting for the OwnerRRef creation, the
+  // RRefContext returns a Future, so that the RPC request processing logic can
+  // attach subsequent code as a callback to that Future.
+  // NB: the OwnerRRefs in this map must be cleared when the corresponding
+  // OwnerRRef is created. Note that the values in this map are intrusive_ptrs
+  // to c10::ivalue::Future that will be marked completed with the owner RRef.
+  std::unordered_map<RRefId, c10::intrusive_ptr<JitFuture>, RRefId::Hash>
+      pendingOwners_;
+  // Tracks known living UserRRefs of an OwnerRRef
+  std::unordered_map<
+      RRefId,
+      std::unordered_set<ForkId, ForkId::Hash>,
+      RRefId::Hash>
+      forks_;
+
+  // This cond var is used by deleteAllUsers(), a event notification is sent if
+  // number of pending UserRRef or UserRRef children is reduced, or
+  // number of owned OwnerRRef is reduced.
+  std::condition_variable deleteAllUsersCV_;
+  // The follow 3 maps keep UserRRefs alive by holding a intrusive_ptr to the
+  // RRef instances. A UserRRef must be added into this map if any of the
+  // following two conditions is true:
+  //
+  // (1) A UserRRef has not been accepted by owner yet.
+  //
+  //     It can be used or shared, but cannot be deleted, and hence kept alive
+  //     in this map. A message of type RREF_USER_ACCEPT will move the
+  //     corresponding RRef from pendingUsers_ map to confirmedUsers_ map.
+  std::unordered_map<ForkId, std::shared_ptr<PendingUserState>, ForkId::Hash>
+      pendingUsers_;
+  //     UserRRefs are added into this map when it is confirmed by the owner.
+  //     When destroying RRefContext this map helps to find local UserRRefs
+  //     and send delete messages if they are still not deleted by Python
+  //     garbage collection.
+  std::unordered_map<ForkId, c10::weak_intrusive_ptr<RRef>, ForkId::Hash>
+      confirmedUsers_;
+
+  // (2) A UserRRef has forked a child UserRRef which has not been accepted by
+  //     the owner yet.
+  //
+  //     In this case, this UserRRef cannot send out RREF_USER_DELETE message,
+  //     as it could potentially trigger the OwnerRRef been deleted before the
+  //     owner learns about the forked child.
+  std::unordered_map<ForkId, c10::intrusive_ptr<RRef>, ForkId::Hash>
+      pendingChildren_;
+
+  // The RRef context performs its operations through async RPC requests, in
+  // order to not block the user code. Therefore the RRef context's state may be
+  // lagging a bit behind what it is intended to be, while it waits for these
+  // requests to complete. To allow syncing when needed, we store the count of
+  // these pending requests, so that users can wait for it to reach zero.
+  std::atomic<int64_t> numPendingFutures_{0};
+
+  std::mutex destroyedMutex_;
+  bool destroyed_{false};
+
+  // Thread local states to keep UserRRefs deserialized from user function
+  // arguments.
+  static thread_local std::vector<std::shared_ptr<PendingUserState>> userTable_;
+  // A flag indicating whether subsequently created UserRRefs should be added to
+  // the thread_local userTable_. The flag is set to true before serializing
+  // RPC arguments and then set to false before running the corresponding
+  // user code. See addPendingUser and delPendingUser for more details.
+  // NB: The reason for having this flag is because addPendingUser are called in
+  // two cases, and we only want to track the 2nd case.
+  // (1) RRef as the return value: when calling rpc.remote, the UserRRef on the
+  //     caller side is added to the context using addPendingUser.
+  // (2) RRef as an argument: When running an RPC using RRefs as arguments, the
+  //     RRef is forwarded to the callee as new UserRRefs (if the callee is not
+  //     the owner). In this case, we block running the user function until all
+  //     UserRRefs are confirmed by the owner.
+  // This contract gurantees that no UserRRefs can be used remotely without
+  // confirmation. Note that, however, the UserRRef created by rpc.remote can
+  // still be passed to local functions as arguments and used there. This is by
+  // design, because this feature is especially useful when, say a master node
+  // creates multiple UserRRefs in a loop and then shares them with other nodes.
+  // Blocking every iteration in the loop until RRefs are confirmed will slow
+  // this down. This nuance on UserRRef can be interpreted as we only make
+  // exceptions for UserRRef creators. And using the UserRRef on its creator
+  // without confirmation is OK, because the creator would either call to_here
+  // or forward the UserRRef, and both would then require confirmations from the
+  // owner.
+  static thread_local bool recording_;
+};
+
+} // namespace rpc
+} // namespace distributed
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/distributed/rpc/rref_proto.h

@@ -0,0 +1,164 @@
+#pragma once
+
+#include <torch/csrc/distributed/rpc/message.h>
+#include <torch/csrc/distributed/rpc/rpc_command_base.h>
+#include <torch/csrc/distributed/rpc/types.h>
+#include <torch/csrc/jit/runtime/operator.h>
+#include <torch/csrc/jit/serialization/pickler.h>
+#include <vector>
+
+namespace torch {
+namespace distributed {
+namespace rpc {
+
+// Temporary solution of RRef operations.
+// TODO: Remove all these messages and use rpc + registered functions instead.
+class TORCH_API RRefMessageBase : public RpcCommandBase {
+ public:
+  RRefMessageBase(const RRefId& rrefId, MessageType type)
+      : rrefId_(rrefId), type_(type) {}
+
+  const RRefId& rrefId();
+
+ protected:
+  // NOLINTNEXTLINE(cppcoreguidelines-non-private-member-variables-in-classes)
+  const RRefId rrefId_;
+  // NOLINTNEXTLINE(cppcoreguidelines-non-private-member-variables-in-classes)
+  const MessageType type_;
+};
+
+class TORCH_API ForkMessageBase : public RRefMessageBase {
+ public:
+  ForkMessageBase(const RRefId& rrefId, const ForkId& forkId, MessageType type)
+      : RRefMessageBase(rrefId, type), forkId_(forkId) {}
+
+  const ForkId& forkId();
+
+  c10::intrusive_ptr<Message> toMessageImpl() && override;
+  static std::pair<RRefId, ForkId> fromMessage(
+      const Message& message,
+      MessageType type);
+
+ protected:
+  // NOLINTNEXTLINE(cppcoreguidelines-non-private-member-variables-in-classes)
+  const ForkId forkId_;
+};
+
+// UserRRef uses this message to fetch the remote RRef value from the owner.
+class TORCH_API ScriptRRefFetchCall final : public RRefMessageBase {
+ public:
+  ScriptRRefFetchCall(worker_id_t fromWorkerId, const RRefId& rrefId)
+      : RRefMessageBase(rrefId, MessageType::SCRIPT_RREF_FETCH_CALL),
+        fromWorkerId_(fromWorkerId) {}
+
+  inline worker_id_t fromWorkerId() const {
+    return fromWorkerId_;
+  }
+
+  c10::intrusive_ptr<Message> toMessageImpl() && override;
+  static std::unique_ptr<ScriptRRefFetchCall> fromMessage(
+      const Message& message);
+
+ private:
+  const worker_id_t fromWorkerId_;
+};
+
+class TORCH_API PythonRRefFetchCall final : public RRefMessageBase {
+ public:
+  PythonRRefFetchCall(worker_id_t fromWorkerId, const RRefId& rrefId)
+      : RRefMessageBase(rrefId, MessageType::PYTHON_RREF_FETCH_CALL),
+        fromWorkerId_(fromWorkerId) {}
+
+  c10::intrusive_ptr<Message> toMessageImpl() && override;
+  static std::unique_ptr<PythonRRefFetchCall> fromMessage(
+      const Message& message);
+
+ private:
+  const worker_id_t fromWorkerId_;
+};
+
+// OwnerRRef uses this message to send the RRef value to a remote UserRRef
+class TORCH_API RRefFetchRet : public RpcCommandBase {
+ public:
+  RRefFetchRet(std::vector<at::IValue> values, MessageType type)
+      : values_(std::move(values)), type_(type) {}
+
+  const std::vector<at::IValue>& values();
+  c10::intrusive_ptr<Message> toMessageImpl() && override;
+
+ private:
+  std::vector<at::IValue> values_;
+  const MessageType type_;
+};
+
+class TORCH_API ScriptRRefFetchRet final : public RRefFetchRet {
+ public:
+  explicit ScriptRRefFetchRet(std::vector<at::IValue> values)
+      : RRefFetchRet(std::move(values), MessageType::SCRIPT_RREF_FETCH_RET) {}
+
+  static std::unique_ptr<ScriptRRefFetchRet> fromMessage(
+      const Message& message);
+};
+
+class TORCH_API PythonRRefFetchRet final : public RRefFetchRet {
+ public:
+  explicit PythonRRefFetchRet(std::vector<at::IValue> values)
+      : RRefFetchRet(std::move(values), MessageType::PYTHON_RREF_FETCH_RET) {}
+
+  static std::unique_ptr<PythonRRefFetchRet> fromMessage(
+      const Message& message);
+};
+
+// UserRRef (regardless it's the creator or not) uses this message to notify
+// OwnerRRef on delete.
+class TORCH_API RRefUserDelete final : public ForkMessageBase {
+ public:
+  RRefUserDelete(const RRefId& rrefId, const ForkId& forkId)
+      : ForkMessageBase(rrefId, forkId, MessageType::RREF_USER_DELETE) {}
+
+  static std::unique_ptr<RRefUserDelete> fromMessage(const Message& message);
+};
+
+class TORCH_API RemoteRet final : public ForkMessageBase {
+ public:
+  RemoteRet(const RRefId& rrefId, const ForkId& forkId)
+      : ForkMessageBase(rrefId, forkId, MessageType::REMOTE_RET) {}
+
+  static std::unique_ptr<RemoteRet> fromMessage(const Message& message);
+};
+
+// A child RRef uses this message to notify its parent that the child has been
+// confirmed by the owner.
+class TORCH_API RRefChildAccept final : public RpcCommandBase {
+ public:
+  explicit RRefChildAccept(const ForkId& forkId) : forkId_(forkId) {}
+
+  const ForkId& forkId() const;
+
+  c10::intrusive_ptr<Message> toMessageImpl() && override;
+  static std::unique_ptr<RRefChildAccept> fromMessage(const Message& message);
+
+ private:
+  const ForkId forkId_;
+};
+
+// A child RRef uses this message to send a fork request to the owner.
+class TORCH_API RRefForkRequest final : public ForkMessageBase {
+ public:
+  RRefForkRequest(const RRefId& rrefId, const ForkId& forkId)
+      : ForkMessageBase(rrefId, forkId, MessageType::RREF_FORK_REQUEST) {}
+
+  static std::unique_ptr<RRefForkRequest> fromMessage(const Message& message);
+};
+
+class TORCH_API RRefAck final : public RpcCommandBase {
+ public:
+  RRefAck() = default;
+
+  c10::intrusive_ptr<Message> toMessageImpl() && override;
+  static std::unique_ptr<RRefAck> fromMessage(const Message& message);
+};
+
+} // namespace rpc
+} // namespace distributed
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/distributed/rpc/script_remote_call.h

@@ -0,0 +1,57 @@
+#pragma once
+
+#include <torch/csrc/distributed/rpc/script_call.h>
+#include <torch/csrc/distributed/rpc/types.h>
+#include <torch/csrc/jit/runtime/operator.h>
+#include <torch/csrc/jit/serialization/pickler.h>
+#include <vector>
+
+namespace torch {
+namespace distributed {
+namespace rpc {
+
+using torch::jit::Operator;
+
+// A ScriptRemoteCall instance represents an invocation of `dist.remote` on a
+// builtin operator. Currently, it does not support using RRef as arguments yet.
+// Besides the operator and a vector of arguments, ScriptRemoteCall also
+// contains the RRefId and the ForkId of the return value RRef.
+class TORCH_API ScriptRemoteCall final : public ScriptCall {
+ public:
+  // Constructor for builitin operator call.
+  ScriptRemoteCall(
+      std::shared_ptr<Operator> op,
+      std::vector<at::IValue>&& stack,
+      const RRefId& retRRefId,
+      const ForkId& retForkId);
+
+  // Constructor for TorchScript function call.
+  ScriptRemoteCall(
+      const c10::QualifiedName& qualifiedName,
+      std::vector<at::IValue>&& stack,
+      const RRefId& retRRefId,
+      const ForkId& retForkId,
+      const bool isAsyncExecution);
+
+  inline const RRefId& retRRefId() const {
+    return retRRefId_;
+  }
+
+  inline const ForkId& retForkId() const {
+    return retForkId_;
+  }
+
+  static std::unique_ptr<ScriptRemoteCall> fromIValues(
+      std::vector<at::IValue>& ivalues);
+
+  c10::intrusive_ptr<Message> toMessageImpl() && override;
+  static std::unique_ptr<ScriptRemoteCall> fromMessage(const Message& message);
+
+ private:
+  const RRefId retRRefId_;
+  const ForkId retForkId_;
+};
+
+} // namespace rpc
+} // namespace distributed
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/distributed/rpc/unpickled_python_remote_call.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include <torch/csrc/distributed/rpc/rpc_command_base.h>
+#include <torch/csrc/distributed/rpc/types.h>
+#include <torch/csrc/distributed/rpc/unpickled_python_call.h>
+#include <torch/csrc/utils/pybind.h>
+
+namespace torch {
+namespace distributed {
+namespace rpc {
+
+// This class converts the content in a PythonRemoteCall into py::object. This
+// is a helper class to make sure that all arguments deserialization is done
+// before entering RequestCallbackImpl::processRpc(...), so that the
+// deserialization related logic can be carried out in one spot instead of
+// scattered in multiple places for different message types.
+// NB: The reason for not consolidating class into PythonRemoteCall is because
+// PythonRemoteCall is a libtorch type which should not depend on Python types.
+class TORCH_API UnpickledPythonRemoteCall final : public UnpickledPythonCall {
+ public:
+  explicit UnpickledPythonRemoteCall(
+      const SerializedPyObj& serializedPyObj,
+      const at::IValue& retRRefId,
+      const at::IValue& retForkId,
+      const bool isAsyncExecution);
+
+  const RRefId& rrefId() const;
+  const ForkId& forkId() const;
+
+ private:
+  RRefId rrefId_;
+  ForkId forkId_;
+};
+
+} // namespace rpc
+} // namespace distributed
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/init.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <torch/csrc/utils/pybind.h>
+
+namespace torch {
+namespace throughput_benchmark {
+
+void initThroughputBenchmarkBindings(PyObject* module);
+
+} // namespace throughput_benchmark
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/invalid_arguments.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <torch/csrc/python_headers.h>
+#include <string>
+#include <vector>
+
+namespace torch {
+
+std::string format_invalid_args(
+    PyObject* given_args,
+    PyObject* given_kwargs,
+    const std::string& function_name,
+    const std::vector<std::string>& options);
+
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/nested.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <torch/csrc/python_headers.h>
+#include <torch/csrc/utils/python_arg_parser.h>
+
+#include <ATen/core/Tensor.h>
+
+namespace torch {
+namespace utils {
+
+at::Tensor nested_tensor_ctor(
+    c10::DispatchKey dispatch_key,
+    at::ScalarType scalar_type,
+    PythonArgs& r);
+
+} // namespace utils
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/numpy_stub.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <torch/csrc/python_headers.h>
+
+#ifdef USE_NUMPY
+
+#if !defined(NO_IMPORT_ARRAY) && !defined(WITH_NUMPY_IMPORT_ARRAY)
+#define NO_IMPORT_ARRAY
+#endif
+
+#ifndef PY_ARRAY_UNIQUE_SYMBOL
+#define PY_ARRAY_UNIQUE_SYMBOL __numpy_array_api
+#endif
+
+#ifndef NPY_NO_DEPRECATED_API
+#define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION
+#endif
+
+#include <numpy/arrayobject.h>
+
+#endif // USE_NUMPY

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/python_numbers.h

@@ -0,0 +1,186 @@
+#pragma once
+
+#include <torch/csrc/Exceptions.h>
+#include <torch/csrc/jit/frontend/tracer.h>
+#include <torch/csrc/python_headers.h>
+#include <torch/csrc/utils/object_ptr.h>
+#include <torch/csrc/utils/tensor_numpy.h>
+#include <cstdint>
+#include <limits>
+#include <stdexcept>
+
+// largest integer that can be represented consecutively in a double
+const int64_t DOUBLE_INT_MAX = 9007199254740992;
+
+inline PyObject* THPUtils_packInt32(int32_t value) {
+  return PyLong_FromLong(value);
+}
+
+inline PyObject* THPUtils_packInt64(int64_t value) {
+  return PyLong_FromLongLong(value);
+}
+
+inline PyObject* THPUtils_packUInt32(uint32_t value) {
+  return PyLong_FromUnsignedLong(value);
+}
+
+inline PyObject* THPUtils_packUInt64(uint64_t value) {
+  return PyLong_FromUnsignedLongLong(value);
+}
+
+inline PyObject* THPUtils_packDoubleAsInt(double value) {
+  return PyLong_FromDouble(value);
+}
+
+inline bool THPUtils_checkLongExact(PyObject* obj) {
+  return PyLong_CheckExact(obj) && !PyBool_Check(obj);
+}
+
+inline bool THPUtils_checkLong(PyObject* obj) {
+  // Fast path
+  if (THPUtils_checkLongExact(obj)) {
+    return true;
+  }
+
+#ifdef USE_NUMPY
+  if (torch::utils::is_numpy_int(obj)) {
+    return true;
+  }
+#endif
+
+  return PyLong_Check(obj) && !PyBool_Check(obj);
+}
+
+inline int32_t THPUtils_unpackInt(PyObject* obj) {
+  // NOLINTNEXTLINE(cppcoreguidelines-init-variables)
+  int overflow;
+  long value = PyLong_AsLongAndOverflow(obj, &overflow);
+  if (value == -1 && PyErr_Occurred()) {
+    throw python_error();
+  }
+  if (overflow != 0) {
+    throw std::runtime_error("Overflow when unpacking long");
+  }
+  if (value > std::numeric_limits<int32_t>::max() ||
+      value < std::numeric_limits<int32_t>::min()) {
+    throw std::runtime_error("Overflow when unpacking long");
+  }
+  return (int32_t)value;
+}
+
+inline int64_t THPUtils_unpackLong(PyObject* obj) {
+  // NOLINTNEXTLINE(cppcoreguidelines-init-variables)
+  int overflow;
+  long long value = PyLong_AsLongLongAndOverflow(obj, &overflow);
+  if (value == -1 && PyErr_Occurred()) {
+    throw python_error();
+  }
+  if (overflow != 0) {
+    throw std::runtime_error("Overflow when unpacking long");
+  }
+  return (int64_t)value;
+}
+
+inline uint32_t THPUtils_unpackUInt32(PyObject* obj) {
+  unsigned long value = PyLong_AsUnsignedLong(obj);
+  if (PyErr_Occurred()) {
+    throw python_error();
+  }
+  if (value > std::numeric_limits<uint32_t>::max()) {
+    throw std::runtime_error("Overflow when unpacking unsigned long");
+  }
+  return (uint32_t)value;
+}
+
+inline uint64_t THPUtils_unpackUInt64(PyObject* obj) {
+  unsigned long long value = PyLong_AsUnsignedLongLong(obj);
+  if (PyErr_Occurred()) {
+    throw python_error();
+  }
+  return (uint64_t)value;
+}
+
+bool THPUtils_checkIndex(PyObject* obj);
+
+inline int64_t THPUtils_unpackIndex(PyObject* obj) {
+  if (!THPUtils_checkLong(obj)) {
+    auto index = THPObjectPtr(PyNumber_Index(obj));
+    if (index == nullptr) {
+      throw python_error();
+    }
+    // NB: This needs to be called before `index` goes out of scope and the
+    // underlying object's refcount is decremented
+    return THPUtils_unpackLong(index.get());
+  }
+  return THPUtils_unpackLong(obj);
+}
+
+inline bool THPUtils_unpackBool(PyObject* obj) {
+  if (obj == Py_True) {
+    return true;
+  } else if (obj == Py_False) {
+    return false;
+  } else {
+    throw std::runtime_error("couldn't convert python object to boolean");
+  }
+}
+
+inline bool THPUtils_checkBool(PyObject* obj) {
+#ifdef USE_NUMPY
+  if (torch::utils::is_numpy_bool(obj)) {
+    return true;
+  }
+#endif
+  return PyBool_Check(obj);
+}
+
+inline bool THPUtils_checkDouble(PyObject* obj) {
+#ifdef USE_NUMPY
+  if (torch::utils::is_numpy_scalar(obj)) {
+    return true;
+  }
+#endif
+  return PyFloat_Check(obj) || PyLong_Check(obj);
+}
+
+inline double THPUtils_unpackDouble(PyObject* obj) {
+  if (PyFloat_Check(obj)) {
+    return PyFloat_AS_DOUBLE(obj);
+  }
+  double value = PyFloat_AsDouble(obj);
+  if (value == -1 && PyErr_Occurred()) {
+    throw python_error();
+  }
+  return value;
+}
+
+inline c10::complex<double> THPUtils_unpackComplexDouble(PyObject* obj) {
+  Py_complex value = PyComplex_AsCComplex(obj);
+  if (value.real == -1.0 && PyErr_Occurred()) {
+    throw python_error();
+  }
+
+  return c10::complex<double>(value.real, value.imag);
+}
+
+inline bool THPUtils_unpackNumberAsBool(PyObject* obj) {
+  if (PyFloat_Check(obj)) {
+    return (bool)PyFloat_AS_DOUBLE(obj);
+  }
+
+  if (PyComplex_Check(obj)) {
+    double real_val = PyComplex_RealAsDouble(obj);
+    double imag_val = PyComplex_ImagAsDouble(obj);
+    return !(real_val == 0 && imag_val == 0);
+  }
+
+  // NOLINTNEXTLINE(cppcoreguidelines-init-variables)
+  int overflow;
+  long long value = PyLong_AsLongLongAndOverflow(obj, &overflow);
+  if (value == -1 && PyErr_Occurred()) {
+    throw python_error();
+  }
+  // No need to check overflow, because when overflow occured, it should
+  // return true in order to keep the same behavior of numpy.
+  return (bool)value;
+}

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/python_raii.h

@@ -0,0 +1,86 @@
+#include <c10/util/Optional.h>
+#include <torch/csrc/utils/pybind.h>
+#include <tuple>
+
+namespace torch {
+namespace impl {
+
+template <typename GuardT, typename... Args>
+struct RAIIContextManager {
+  explicit RAIIContextManager(Args&&... args)
+      : args_(std::forward<Args>(args)...) {}
+
+  void enter() {
+    auto emplace = [&](Args... args) {
+      guard_.emplace(std::forward<Args>(args)...);
+    };
+    std::apply(std::move(emplace), args_);
+  }
+
+  void exit() {
+    guard_ = c10::nullopt;
+  }
+
+ private:
+  c10::optional<GuardT> guard_;
+  std::tuple<Args...> args_;
+};
+
+// Turns a C++ RAII guard into a Python context manager.
+// See _ExcludeDispatchKeyGuard in python_dispatch.cpp for example.
+template <typename GuardT, typename... GuardArgs>
+void py_context_manager(const py::module& m, const char* name) {
+  using ContextManagerT = RAIIContextManager<GuardT, GuardArgs...>;
+  py::class_<ContextManagerT>(m, name)
+      .def(py::init<GuardArgs...>())
+      .def("__enter__", [](ContextManagerT& guard) { guard.enter(); })
+      .def(
+          "__exit__",
+          [](ContextManagerT& guard,
+             py::object exc_type,
+             py::object exc_value,
+             py::object traceback) { guard.exit(); });
+}
+
+template <typename GuardT, typename... Args>
+struct DeprecatedRAIIContextManager {
+  explicit DeprecatedRAIIContextManager(Args&&... args) {
+    guard_.emplace(std::forward<Args>(args)...);
+  }
+
+  void enter() {}
+
+  void exit() {
+    guard_ = c10::nullopt;
+  }
+
+ private:
+  c10::optional<GuardT> guard_;
+  std::tuple<Args...> args_;
+};
+
+// Definition: a "Python RAII guard" is an object in Python that acquires
+// a resource on init and releases the resource on deletion.
+//
+// This API turns a C++ RAII guard into an object can be used either as a
+// Python context manager or as a "Python RAII guard".
+//
+// Please prefer `py_context_manager` to this API if you are binding a new
+// RAII guard into Python because "Python RAII guards" don't work as expected
+// in Python (Python makes no guarantees about when an object gets deleted)
+template <typename GuardT, typename... GuardArgs>
+void py_context_manager_DEPRECATED(const py::module& m, const char* name) {
+  using ContextManagerT = DeprecatedRAIIContextManager<GuardT, GuardArgs...>;
+  py::class_<ContextManagerT>(m, name)
+      .def(py::init<GuardArgs...>())
+      .def("__enter__", [](ContextManagerT& guard) { guard.enter(); })
+      .def(
+          "__exit__",
+          [](ContextManagerT& guard,
+             py::object exc_type,
+             py::object exc_value,
+             py::object traceback) { guard.exit(); });
+}
+
+} // namespace impl
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/python_strings.h

@@ -0,0 +1,129 @@
+#pragma once
+
+#include <torch/csrc/python_headers.h>
+#include <torch/csrc/utils/object_ptr.h>
+#include <torch/csrc/utils/pybind.h>
+#include <stdexcept>
+#include <string>
+
+// Utilities for handling Python strings. Note that PyString, when defined, is
+// the same as PyBytes.
+
+// Returns true if obj is a bytes/str or unicode object
+// As of Python 3.6, this does not require the GIL
+inline bool THPUtils_checkString(PyObject* obj) {
+  return PyBytes_Check(obj) || PyUnicode_Check(obj);
+}
+
+// Unpacks PyBytes (PyString) or PyUnicode as std::string
+// PyBytes are unpacked as-is. PyUnicode is unpacked as UTF-8.
+// NOTE: this method requires the GIL
+inline std::string THPUtils_unpackString(PyObject* obj) {
+  if (PyBytes_Check(obj)) {
+    size_t size = PyBytes_GET_SIZE(obj);
+    return std::string(PyBytes_AS_STRING(obj), size);
+  }
+  if (PyUnicode_Check(obj)) {
+    Py_ssize_t size = 0;
+    const char* data = PyUnicode_AsUTF8AndSize(obj, &size);
+    if (!data) {
+      throw std::runtime_error("error unpacking string as utf-8");
+    }
+    return std::string(data, (size_t)size);
+  }
+  throw std::runtime_error("unpackString: expected bytes or unicode object");
+}
+
+// Unpacks PyBytes (PyString) or PyUnicode as c10::string_view
+// PyBytes are unpacked as-is. PyUnicode is unpacked as UTF-8.
+// NOTE: If `obj` is destroyed, then the non-owning c10::string_view will
+//   become invalid. If the string needs to be accessed at any point after
+//   `obj` is destroyed, then the c10::string_view should be copied into
+//   a std::string, or another owning object, and kept alive. For an example,
+//   look at how IValue and autograd nodes handle c10::string_view arguments.
+// NOTE: this method requires the GIL
+inline c10::string_view THPUtils_unpackStringView(PyObject* obj) {
+  if (PyBytes_Check(obj)) {
+    size_t size = PyBytes_GET_SIZE(obj);
+    return c10::string_view(PyBytes_AS_STRING(obj), size);
+  }
+  if (PyUnicode_Check(obj)) {
+    Py_ssize_t size = 0;
+    const char* data = PyUnicode_AsUTF8AndSize(obj, &size);
+    if (!data) {
+      throw std::runtime_error("error unpacking string as utf-8");
+    }
+    return c10::string_view(data, (size_t)size);
+  }
+  throw std::runtime_error("unpackString: expected bytes or unicode object");
+}
+
+inline PyObject* THPUtils_packString(const char* str) {
+  return PyUnicode_FromString(str);
+}
+
+inline PyObject* THPUtils_packString(const std::string& str) {
+  return PyUnicode_FromStringAndSize(str.c_str(), str.size());
+}
+
+inline PyObject* THPUtils_internString(const std::string& str) {
+  return PyUnicode_InternFromString(str.c_str());
+}
+
+// Precondition: THPUtils_checkString(obj) must be true
+inline bool THPUtils_isInterned(PyObject* obj) {
+  return PyUnicode_CHECK_INTERNED(obj);
+}
+
+// Precondition: THPUtils_checkString(obj) must be true
+inline void THPUtils_internStringInPlace(PyObject** obj) {
+  PyUnicode_InternInPlace(obj);
+}
+
+/*
+ * Reference:
+ * https://github.com/numpy/numpy/blob/f4c497c768e0646df740b647782df463825bfd27/numpy/core/src/common/get_attr_string.h#L42
+ *
+ * Stripped down version of PyObject_GetAttrString,
+ * avoids lookups for None, tuple, and List objects,
+ * and doesn't create a PyErr since this code ignores it.
+ *
+ * This can be much faster then PyObject_GetAttrString where
+ * exceptions are not used by caller.
+ *
+ * 'obj' is the object to search for attribute.
+ *
+ * 'name' is the attribute to search for.
+ *
+ * Returns a py::object wrapping the return value. If the attribute lookup
+ * failed the value will be NULL.
+ *
+ */
+
+// NOLINTNEXTLINE(clang-diagnostic-unused-function)
+static py::object PyObject_FastGetAttrString(PyObject* obj, const char* name) {
+  PyTypeObject* tp = Py_TYPE(obj);
+  PyObject* res = (PyObject*)nullptr;
+
+  /* Attribute referenced by (char *)name */
+  if (tp->tp_getattr != nullptr) {
+    // This is OK per https://bugs.python.org/issue39620
+    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
+    res = (*tp->tp_getattr)(obj, const_cast<char*>(name));
+    if (res == nullptr) {
+      PyErr_Clear();
+    }
+  }
+  /* Attribute referenced by (PyObject *)name */
+  else if (tp->tp_getattro != nullptr) {
+    auto w = py::reinterpret_steal<py::object>(THPUtils_internString(name));
+    if (w.ptr() == nullptr) {
+      return py::object();
+    }
+    res = (*tp->tp_getattro)(obj, w.ptr());
+    if (res == nullptr) {
+      PyErr_Clear();
+    }
+  }
+  return py::reinterpret_steal<py::object>(res);
+}

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/python_stub.h

@@ -0,0 +1,4 @@
+#pragma once
+
+struct _object;
+using PyObject = _object;

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/python_torch_function_mode.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include <ATen/PythonTorchFunctionTLS.h>
+
+namespace torch {
+namespace overrides {
+
+struct StashTorchFunctionModeGuard {
+  StashTorchFunctionModeGuard() {
+    cur_mode_ = at::impl::PythonTorchFunctionTLS::pop_stack();
+  }
+  ~StashTorchFunctionModeGuard() {
+    at::impl::PythonTorchFunctionTLS::push_onto_stack(cur_mode_);
+  }
+
+  const std::shared_ptr<c10::SafePyObject>& get_cur_mode() {
+    return cur_mode_;
+  }
+
+ private:
+  std::shared_ptr<c10::SafePyObject> cur_mode_;
+};
+
+} // namespace overrides
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/schema_info.h

@@ -0,0 +1,117 @@
+#pragma once
+
+#include <torch/csrc/jit/frontend/function_schema_parser.h>
+#include <unordered_set>
+
+namespace torch {
+namespace utils {
+
+using SchemaSpecialCasePair =
+    std::pair<c10::FunctionSchema, std::unordered_set<std::string>>;
+/**
+ * class SchemaInfo
+ *
+ * FunctionSchema wrapper that publicizes argument value specific operator
+ * behavior (mutation, aliasing, special cases, etc...)
+ */
+
+struct TORCH_API SchemaInfo {
+ public:
+  explicit SchemaInfo(c10::FunctionSchema schema)
+      : schema_(std::move(schema)),
+        alias_maps_current_(false),
+        has_init_(false) {}
+  explicit SchemaInfo(const char* signature)
+      : schema_(torch::jit::parseSchema(signature)),
+        alias_maps_current_(false),
+        has_init_(false) {}
+
+  bool is_mutable();
+
+  bool is_mutable(const c10::SchemaArgument& argument);
+
+  bool is_mutable(c10::string_view name);
+
+  bool has_argument(c10::string_view name);
+
+  bool is_nondeterministic() const;
+
+  // Returns whether lhs and rhs may alias directly.
+  // This does not account for cases where lhs or rhs are a container that
+  // may contain elements that alias the other argument.
+  // Besides the checks already included in FunctionSchema::may_alias, this
+  // method also accounts special aliasing cases causes by aliasing argument
+  // values supplied from addArgumentValue.
+  bool may_alias(
+      const c10::SchemaArgument& lhs,
+      const c10::SchemaArgument& rhs);
+
+  // Returns whether lhs and rhs may alias directly or whether lhs/rhs are a
+  // container that may contain elements that alias the other argument. Besides
+  // the checks already included in FunctionSchema::may_contain_alias, this
+  // method also accounts for special aliasing cases causes by aliasing argument
+  // values supplied from addArgumentValue. bidirectional = false only returns
+  // whether lhs may contain an alias of rhs while bidirectional = true returns
+  // both directions.
+  bool may_contain_alias(
+      const c10::SchemaArgument& lhs,
+      const c10::SchemaArgument& rhs,
+      bool bidirectional = true);
+
+  void addArgumentValue(const std::string& name, const at::IValue& value);
+
+  void addArgumentValues(
+      const std::vector<c10::optional<at::IValue>>& value_list);
+
+  void addArgumentValues(
+      const std::unordered_map<std::string, at::IValue>& values);
+
+  bool hasInputArgumentNamed(const std::string& name) const;
+
+ private:
+  // This function enforces more conservative results when the TORCH_WARN is
+  // triggered from above due to duplicates in an argument list
+  void ensureConservativity(
+      const std::unordered_set<at::Symbol>& duplicates,
+      const std::vector<c10::Argument>& arguments_list,
+      c10::SchemaArgType type);
+
+  void initSchemaInfo();
+
+  void generateAliasMaps();
+
+  bool mayContainAliasImpl(
+      const c10::SchemaArgument& lhs,
+      const c10::SchemaArgument& rhs);
+
+  static std::vector<c10::FunctionSchema> getNonDeterministicOps();
+
+  static std::vector<SchemaSpecialCasePair> getTrainingOps();
+
+  const std::unordered_set<c10::SchemaArgument>& wildcardSet();
+
+  const std::unordered_set<c10::SchemaArgument>& containerSet();
+
+  // Set of all wildcard arguments
+  std::unordered_set<c10::SchemaArgument> wildcard_set_;
+
+  // Set of all container arguments
+  std::unordered_set<c10::SchemaArgument> container_set_;
+
+  // Map of argument IValues
+  std::unordered_map<std::string, at::IValue> value_map_;
+
+  // Alias map of inputs with each other
+  std::vector<std::unordered_set<size_t>> input_alias_map_;
+
+  // Alias map of outputs to inputs
+  std::vector<std::unordered_set<size_t>> output_alias_map_;
+
+  const c10::FunctionSchema schema_;
+
+  bool alias_maps_current_;
+
+  bool has_init_;
+};
+} // namespace utils
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/structseq.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <torch/csrc/python_headers.h>
+
+namespace torch {
+namespace utils {
+
+PyObject* returned_structseq_repr(PyStructSequence* obj);
+
+}
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/tensor_list.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <torch/csrc/python_headers.h>
+
+namespace at {
+class Tensor;
+}
+
+namespace torch {
+namespace utils {
+
+PyObject* tensor_to_list(const at::Tensor& tensor);
+
+}
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/tensor_numpy.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <ATen/core/Tensor.h>
+#include <torch/csrc/python_headers.h>
+
+namespace torch {
+namespace utils {
+
+PyObject* tensor_to_numpy(const at::Tensor& tensor, bool force = false);
+at::Tensor tensor_from_numpy(PyObject* obj, bool warn_if_not_writeable = true);
+
+int aten_to_numpy_dtype(const at::ScalarType scalar_type);
+at::ScalarType numpy_dtype_to_aten(int dtype);
+
+bool is_numpy_available();
+bool is_numpy_int(PyObject* obj);
+bool is_numpy_bool(PyObject* obj);
+bool is_numpy_scalar(PyObject* obj);
+
+void warn_numpy_not_writeable();
+at::Tensor tensor_from_cuda_array_interface(PyObject* obj);
+
+void validate_numpy_for_dlpack_deleter_bug();
+bool is_numpy_dlpack_deleter_bugged();
+
+} // namespace utils
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/tensor_types.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <ATen/core/DeprecatedTypeProperties.h>
+#include <c10/core/TensorOptions.h>
+#include <utility>
+#include <vector>
+
+namespace torch {
+namespace utils {
+
+std::string options_to_string(const at::TensorOptions& options);
+std::string type_to_string(const at::DeprecatedTypeProperties& type);
+at::TensorOptions options_from_string(const std::string& str);
+
+// return a vector of all "declared" types, even those that weren't compiled
+std::vector<std::pair<at::Backend, at::ScalarType>> all_declared_types();
+
+} // namespace utils
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/throughput_benchmark-inl.h

@@ -0,0 +1,151 @@
+#pragma once
+
+#include <random>
+#include <thread>
+
+#include <torch/csrc/autograd/profiler.h>
+#include <torch/csrc/jit/python/pybind_utils.h>
+#include <torch/csrc/utils/pybind.h>
+
+#include <ATen/Parallel.h>
+#include <c10/util/irange.h>
+
+namespace torch {
+namespace throughput_benchmark {
+namespace detail {
+
+template <class Input, class Output, class Model>
+BenchmarkExecutionStats BenchmarkHelper<Input, Output, Model>::benchmark(
+    const BenchmarkConfig& config) const {
+  CHECK(initialized_);
+  TORCH_CHECK(
+      config.num_worker_threads == 1,
+      "Only parallelization by callers is supported");
+
+  LOG(INFO) << at::get_parallel_info();
+
+  // We pre-generate inputs here for each of the threads. This allows us to
+  // safely move inputs out for each of the threads independently and thus avoid
+  // overhead from the benchmark runner itself
+  std::vector<std::vector<Input>> thread_inputs(config.num_calling_threads);
+  std::vector<size_t> input_iters(config.num_calling_threads);
+  {
+    std::random_device seeder;
+    std::mt19937 engine(seeder());
+    TORCH_CHECK(
+        !inputs_.empty(),
+        "Please provide benchmark inputs."
+        "Did you forget to call add_input()? ");
+    std::uniform_int_distribution<int> dist(0, inputs_.size() - 1);
+
+    for (const auto thread_id : c10::irange(config.num_calling_threads)) {
+      // Just in case we generate num_iters inputs for each of the threads
+      // This was if one thread does all the work we will be fine
+      for (const auto i [[maybe_unused]] :
+           c10::irange(config.num_iters + config.num_warmup_iters)) {
+        thread_inputs[thread_id].push_back(cloneInput(inputs_[dist(engine)]));
+      }
+      input_iters[thread_id] = 0;
+    }
+  }
+
+  std::mutex m;
+  std::condition_variable worker_main_cv;
+  std::condition_variable main_worker_cv;
+  // TODO: add GUARDED_BY once it is available
+  int64_t initialized{0};
+  int64_t finished{0};
+  bool start{false};
+  std::atomic<int64_t> num_attempted_iters{0};
+  std::vector<std::thread> callers;
+
+  callers.reserve(config.num_calling_threads);
+  for (const auto thread_id : c10::irange(config.num_calling_threads)) {
+    callers.emplace_back([&, thread_id]() {
+      // We use conditional variable as a barrier to make sure each thread
+      // performs required warmeup iterations before we start measuring
+      for (const auto j : c10::irange(config.num_warmup_iters)) {
+        (void)j;
+        runOnce(std::move(thread_inputs[thread_id][input_iters[thread_id]]));
+        ++input_iters[thread_id];
+      }
+      {
+        std::unique_lock<std::mutex> lock(m);
+        ++initialized;
+        worker_main_cv.notify_one();
+        // NOLINTNEXTLINE(bugprone-infinite-loop)
+        while (!start) {
+          main_worker_cv.wait(lock);
+        }
+      }
+      LOG(INFO) << "Starting forward thread " << thread_id;
+      while (num_attempted_iters.fetch_add(1) < config.num_iters) {
+        runOnce(std::move(thread_inputs[thread_id][input_iters[thread_id]]));
+        ++input_iters[thread_id];
+      }
+
+      {
+        std::unique_lock<std::mutex> lock(m);
+        ++finished;
+        worker_main_cv.notify_one();
+        LOG(INFO) << "Shutting down forward thread " << thread_id
+                  << ". Total number of finished threads: " << finished;
+      }
+    });
+  }
+
+  using Clock = std::chrono::high_resolution_clock;
+  using RecordProfile = torch::autograd::profiler::RecordProfile;
+  using TimePoint = std::chrono::time_point<Clock>;
+  TimePoint start_time;
+
+  std::unique_ptr<RecordProfile> profiler_guard;
+  {
+    std::unique_lock<std::mutex> lock(m);
+    while (initialized != config.num_calling_threads) {
+      worker_main_cv.wait(lock);
+    }
+    if (!config.profiler_output_path.empty()) {
+      LOG(INFO) << "Using Autograd profiler. Trace will be saved to "
+                << config.profiler_output_path;
+      profiler_guard =
+          std::make_unique<RecordProfile>(config.profiler_output_path);
+    }
+    LOG(INFO) << "Starting threads";
+    start = true;
+    start_time = Clock::now();
+  }
+
+  main_worker_cv.notify_all();
+  {
+    std::unique_lock<std::mutex> lock(m);
+    worker_main_cv.wait(
+        lock, [&]() { return finished == config.num_calling_threads; });
+  }
+  auto end_time = std::chrono::high_resolution_clock::now();
+  profiler_guard.reset();
+  LOG(INFO) << "Finished benchmark";
+
+  BenchmarkExecutionStats stats;
+  // NOLINTNEXTLINE(cppcoreguidelines-narrowing-conversions,bugprone-narrowing-conversions)
+  float total_time_ms = std::chrono::duration_cast<std::chrono::nanoseconds>(
+                            end_time - start_time)
+                            .count() /
+      1000.0 / 1000.0;
+  // We use config.num_iters instead of num_attempted_iters as it is
+  // repsesatative of the real work done. Last attempted iteration on each
+  // calling threads doesn't represent the real work (i.e. running the model)
+  stats.latency_avg_ms =
+      // NOLINTNEXTLINE(cppcoreguidelines-narrowing-conversions,bugprone-narrowing-conversions)
+      total_time_ms * config.num_calling_threads / config.num_iters;
+  stats.num_iters = config.num_iters;
+
+  for (auto& t : callers) {
+    t.join();
+  }
+  return stats;
+}
+
+} // namespace detail
+} // namespace throughput_benchmark
+} // namespace torch

videollama2/lib/python3.10/site-packages/torch/include/torch/csrc/utils/torch_dispatch_mode.h

@@ -0,0 +1,58 @@
+#pragma once
+
+#include <c10/core/impl/TorchDispatchModeTLS.h>
+
+namespace torch {
+namespace torch_dispatch_mode {
+
+struct StashTorchDispatchModeGuard {
+ public:
+  StashTorchDispatchModeGuard() {
+    if (c10::impl::TorchDispatchModeTLS::any_modes_set(
+            /*skip_infra_modes=*/true)) {
+      saved_mode_ = c10::impl::TorchDispatchModeTLS::pop_stack();
+    } else {
+      auto mode_and_key =
+          c10::impl::TorchDispatchModeTLS::pop_highest_infra_mode();
+      saved_mode_ = std::move(std::get<0>(mode_and_key));
+      saved_mode_key_ = std::get<1>(mode_and_key);
+    }
+  }
+
+  ~StashTorchDispatchModeGuard() {
+    if (saved_mode_key_ != c10::nullopt) {
+      c10::impl::TorchDispatchModeTLS::set_mode(
+          saved_mode_, saved_mode_key_.value());
+    } else {
+      c10::impl::TorchDispatchModeTLS::push_non_infra_mode_onto_stack(
+          std::move(saved_mode_));
+    }
+  }
+
+  const std::shared_ptr<c10::SafePyObject>& get_cur_mode() {
+    return saved_mode_;
+  }
+
+ private:
+  std::shared_ptr<at::SafePyObject> saved_mode_;
+  c10::optional<c10::impl::TorchDispatchModeKey> saved_mode_key_;
+};
+
+struct StashTorchDispatchStackGuard {
+ public:
+  StashTorchDispatchStackGuard() {
+    auto old = c10::impl::TorchDispatchModeTLS::get_state();
+    c10::impl::TorchDispatchModeTLS::set_state(std::move(saved_state_));
+    saved_state_ = std::move(old);
+  }
+
+  ~StashTorchDispatchStackGuard() {
+    c10::impl::TorchDispatchModeTLS::set_state(std::move(saved_state_));
+  }
+
+ private:
+  c10::impl::TorchDispatchModeTLS saved_state_;
+};
+
+} // namespace torch_dispatch_mode
+} // namespace torch

vllm/lib/python3.10/site-packages/dns/_features.py

@@ -0,0 +1,95 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+import importlib.metadata
+import itertools
+import string
+from typing import Dict, List, Tuple
+
+
+def _tuple_from_text(version: str) -> Tuple:
+    text_parts = version.split(".")
+    int_parts = []
+    for text_part in text_parts:
+        digit_prefix = "".join(
+            itertools.takewhile(lambda x: x in string.digits, text_part)
+        )
+        try:
+            int_parts.append(int(digit_prefix))
+        except Exception:
+            break
+    return tuple(int_parts)
+
+
+def _version_check(
+    requirement: str,
+) -> bool:
+    """Is the requirement fulfilled?
+
+    The requirement must be of the form
+
+        package>=version
+    """
+    package, minimum = requirement.split(">=")
+    try:
+        version = importlib.metadata.version(package)
+        # This shouldn't happen, but it apparently can.
+        if version is None:
+            return False
+    except Exception:
+        return False
+    t_version = _tuple_from_text(version)
+    t_minimum = _tuple_from_text(minimum)
+    if t_version < t_minimum:
+        return False
+    return True
+
+
+_cache: Dict[str, bool] = {}
+
+
+def have(feature: str) -> bool:
+    """Is *feature* available?
+
+    This tests if all optional packages needed for the
+    feature are available and recent enough.
+
+    Returns ``True`` if the feature is available,
+    and ``False`` if it is not or if metadata is
+    missing.
+    """
+    value = _cache.get(feature)
+    if value is not None:
+        return value
+    requirements = _requirements.get(feature)
+    if requirements is None:
+        # we make a cache entry here for consistency not performance
+        _cache[feature] = False
+        return False
+    ok = True
+    for requirement in requirements:
+        if not _version_check(requirement):
+            ok = False
+            break
+    _cache[feature] = ok
+    return ok
+
+
+def force(feature: str, enabled: bool) -> None:
+    """Force the status of *feature* to be *enabled*.
+
+    This method is provided as a workaround for any cases
+    where importlib.metadata is ineffective, or for testing.
+    """
+    _cache[feature] = enabled
+
+
+_requirements: Dict[str, List[str]] = {
+    ### BEGIN generated requirements
+    "dnssec": ["cryptography>=43"],
+    "doh": ["httpcore>=1.0.0", "httpx>=0.26.0", "h2>=4.1.0"],
+    "doq": ["aioquic>=1.0.0"],
+    "idna": ["idna>=3.7"],
+    "trio": ["trio>=0.23"],
+    "wmi": ["wmi>=1.5.1"],
+    ### END generated requirements
+}

vllm/lib/python3.10/site-packages/dns/_trio_backend.py

@@ -0,0 +1,253 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+"""trio async I/O library query support"""
+
+import socket
+
+import trio
+import trio.socket  # type: ignore
+
+import dns._asyncbackend
+import dns._features
+import dns.exception
+import dns.inet
+
+if not dns._features.have("trio"):
+    raise ImportError("trio not found or too old")
+
+
+def _maybe_timeout(timeout):
+    if timeout is not None:
+        return trio.move_on_after(timeout)
+    else:
+        return dns._asyncbackend.NullContext()
+
+
+# for brevity
+_lltuple = dns.inet.low_level_address_tuple
+
+# pylint: disable=redefined-outer-name
+
+
+class DatagramSocket(dns._asyncbackend.DatagramSocket):
+    def __init__(self, sock):
+        super().__init__(sock.family, socket.SOCK_DGRAM)
+        self.socket = sock
+
+    async def sendto(self, what, destination, timeout):
+        with _maybe_timeout(timeout):
+            if destination is None:
+                return await self.socket.send(what)
+            else:
+                return await self.socket.sendto(what, destination)
+        raise dns.exception.Timeout(
+            timeout=timeout
+        )  # pragma: no cover  lgtm[py/unreachable-statement]
+
+    async def recvfrom(self, size, timeout):
+        with _maybe_timeout(timeout):
+            return await self.socket.recvfrom(size)
+        raise dns.exception.Timeout(timeout=timeout)  # lgtm[py/unreachable-statement]
+
+    async def close(self):
+        self.socket.close()
+
+    async def getpeername(self):
+        return self.socket.getpeername()
+
+    async def getsockname(self):
+        return self.socket.getsockname()
+
+    async def getpeercert(self, timeout):
+        raise NotImplementedError
+
+
+class StreamSocket(dns._asyncbackend.StreamSocket):
+    def __init__(self, family, stream, tls=False):
+        super().__init__(family, socket.SOCK_STREAM)
+        self.stream = stream
+        self.tls = tls
+
+    async def sendall(self, what, timeout):
+        with _maybe_timeout(timeout):
+            return await self.stream.send_all(what)
+        raise dns.exception.Timeout(timeout=timeout)  # lgtm[py/unreachable-statement]
+
+    async def recv(self, size, timeout):
+        with _maybe_timeout(timeout):
+            return await self.stream.receive_some(size)
+        raise dns.exception.Timeout(timeout=timeout)  # lgtm[py/unreachable-statement]
+
+    async def close(self):
+        await self.stream.aclose()
+
+    async def getpeername(self):
+        if self.tls:
+            return self.stream.transport_stream.socket.getpeername()
+        else:
+            return self.stream.socket.getpeername()
+
+    async def getsockname(self):
+        if self.tls:
+            return self.stream.transport_stream.socket.getsockname()
+        else:
+            return self.stream.socket.getsockname()
+
+    async def getpeercert(self, timeout):
+        if self.tls:
+            with _maybe_timeout(timeout):
+                await self.stream.do_handshake()
+            return self.stream.getpeercert()
+        else:
+            raise NotImplementedError
+
+
+if dns._features.have("doh"):
+    import httpcore
+    import httpcore._backends.trio
+    import httpx
+
+    _CoreAsyncNetworkBackend = httpcore.AsyncNetworkBackend
+    _CoreTrioStream = httpcore._backends.trio.TrioStream
+
+    from dns.query import _compute_times, _expiration_for_this_attempt, _remaining
+
+    class _NetworkBackend(_CoreAsyncNetworkBackend):
+        def __init__(self, resolver, local_port, bootstrap_address, family):
+            super().__init__()
+            self._local_port = local_port
+            self._resolver = resolver
+            self._bootstrap_address = bootstrap_address
+            self._family = family
+
+        async def connect_tcp(
+            self, host, port, timeout, local_address, socket_options=None
+        ):  # pylint: disable=signature-differs
+            addresses = []
+            _, expiration = _compute_times(timeout)
+            if dns.inet.is_address(host):
+                addresses.append(host)
+            elif self._bootstrap_address is not None:
+                addresses.append(self._bootstrap_address)
+            else:
+                timeout = _remaining(expiration)
+                family = self._family
+                if local_address:
+                    family = dns.inet.af_for_address(local_address)
+                answers = await self._resolver.resolve_name(
+                    host, family=family, lifetime=timeout
+                )
+                addresses = answers.addresses()
+            for address in addresses:
+                try:
+                    af = dns.inet.af_for_address(address)
+                    if local_address is not None or self._local_port != 0:
+                        source = (local_address, self._local_port)
+                    else:
+                        source = None
+                    destination = (address, port)
+                    attempt_expiration = _expiration_for_this_attempt(2.0, expiration)
+                    timeout = _remaining(attempt_expiration)
+                    sock = await Backend().make_socket(
+                        af, socket.SOCK_STREAM, 0, source, destination, timeout
+                    )
+                    return _CoreTrioStream(sock.stream)
+                except Exception:
+                    continue
+            raise httpcore.ConnectError
+
+        async def connect_unix_socket(
+            self, path, timeout, socket_options=None
+        ):  # pylint: disable=signature-differs
+            raise NotImplementedError
+
+        async def sleep(self, seconds):  # pylint: disable=signature-differs
+            await trio.sleep(seconds)
+
+    class _HTTPTransport(httpx.AsyncHTTPTransport):
+        def __init__(
+            self,
+            *args,
+            local_port=0,
+            bootstrap_address=None,
+            resolver=None,
+            family=socket.AF_UNSPEC,
+            **kwargs,
+        ):
+            if resolver is None and bootstrap_address is None:
+                # pylint: disable=import-outside-toplevel,redefined-outer-name
+                import dns.asyncresolver
+
+                resolver = dns.asyncresolver.Resolver()
+            super().__init__(*args, **kwargs)
+            self._pool._network_backend = _NetworkBackend(
+                resolver, local_port, bootstrap_address, family
+            )
+
+else:
+    _HTTPTransport = dns._asyncbackend.NullTransport  # type: ignore
+
+
+class Backend(dns._asyncbackend.Backend):
+    def name(self):
+        return "trio"
+
+    async def make_socket(
+        self,
+        af,
+        socktype,
+        proto=0,
+        source=None,
+        destination=None,
+        timeout=None,
+        ssl_context=None,
+        server_hostname=None,
+    ):
+        s = trio.socket.socket(af, socktype, proto)
+        stream = None
+        try:
+            if source:
+                await s.bind(_lltuple(source, af))
+            if socktype == socket.SOCK_STREAM or destination is not None:
+                connected = False
+                with _maybe_timeout(timeout):
+                    await s.connect(_lltuple(destination, af))
+                    connected = True
+                if not connected:
+                    raise dns.exception.Timeout(
+                        timeout=timeout
+                    )  # lgtm[py/unreachable-statement]
+        except Exception:  # pragma: no cover
+            s.close()
+            raise
+        if socktype == socket.SOCK_DGRAM:
+            return DatagramSocket(s)
+        elif socktype == socket.SOCK_STREAM:
+            stream = trio.SocketStream(s)
+            tls = False
+            if ssl_context:
+                tls = True
+                try:
+                    stream = trio.SSLStream(
+                        stream, ssl_context, server_hostname=server_hostname
+                    )
+                except Exception:  # pragma: no cover
+                    await stream.aclose()
+                    raise
+            return StreamSocket(af, stream, tls)
+        raise NotImplementedError(
+            "unsupported socket " + f"type {socktype}"
+        )  # pragma: no cover
+
+    async def sleep(self, interval):
+        await trio.sleep(interval)
+
+    def get_transport_class(self):
+        return _HTTPTransport
+
+    async def wait_for(self, awaitable, timeout):
+        with _maybe_timeout(timeout):
+            return await awaitable
+        raise dns.exception.Timeout(
+            timeout=timeout
+        )  # pragma: no cover  lgtm[py/unreachable-statement]

vllm/lib/python3.10/site-packages/dns/asyncbackend.py

@@ -0,0 +1,101 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+from typing import Dict
+
+import dns.exception
+
+# pylint: disable=unused-import
+from dns._asyncbackend import (  # noqa: F401  lgtm[py/unused-import]
+    Backend,
+    DatagramSocket,
+    Socket,
+    StreamSocket,
+)
+
+# pylint: enable=unused-import
+
+_default_backend = None
+
+_backends: Dict[str, Backend] = {}
+
+# Allow sniffio import to be disabled for testing purposes
+_no_sniffio = False
+
+
+class AsyncLibraryNotFoundError(dns.exception.DNSException):
+    pass
+
+
+def get_backend(name: str) -> Backend:
+    """Get the specified asynchronous backend.
+
+    *name*, a ``str``, the name of the backend.  Currently the "trio"
+    and "asyncio" backends are available.
+
+    Raises NotImplementedError if an unknown backend name is specified.
+    """
+    # pylint: disable=import-outside-toplevel,redefined-outer-name
+    backend = _backends.get(name)
+    if backend:
+        return backend
+    if name == "trio":
+        import dns._trio_backend
+
+        backend = dns._trio_backend.Backend()
+    elif name == "asyncio":
+        import dns._asyncio_backend
+
+        backend = dns._asyncio_backend.Backend()
+    else:
+        raise NotImplementedError(f"unimplemented async backend {name}")
+    _backends[name] = backend
+    return backend
+
+
+def sniff() -> str:
+    """Attempt to determine the in-use asynchronous I/O library by using
+    the ``sniffio`` module if it is available.
+
+    Returns the name of the library, or raises AsyncLibraryNotFoundError
+    if the library cannot be determined.
+    """
+    # pylint: disable=import-outside-toplevel
+    try:
+        if _no_sniffio:
+            raise ImportError
+        import sniffio
+
+        try:
+            return sniffio.current_async_library()
+        except sniffio.AsyncLibraryNotFoundError:
+            raise AsyncLibraryNotFoundError("sniffio cannot determine async library")
+    except ImportError:
+        import asyncio
+
+        try:
+            asyncio.get_running_loop()
+            return "asyncio"
+        except RuntimeError:
+            raise AsyncLibraryNotFoundError("no async library detected")
+
+
+def get_default_backend() -> Backend:
+    """Get the default backend, initializing it if necessary."""
+    if _default_backend:
+        return _default_backend
+
+    return set_default_backend(sniff())
+
+
+def set_default_backend(name: str) -> Backend:
+    """Set the default backend.
+
+    It's not normally necessary to call this method, as
+    ``get_default_backend()`` will initialize the backend
+    appropriately in many cases.  If ``sniffio`` is not installed, or
+    in testing situations, this function allows the backend to be set
+    explicitly.
+    """
+    global _default_backend
+    _default_backend = get_backend(name)
+    return _default_backend

vllm/lib/python3.10/site-packages/dns/asyncquery.py

@@ -0,0 +1,913 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+# Copyright (C) 2003-2017 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""Talk to a DNS server."""
+
+import base64
+import contextlib
+import random
+import socket
+import struct
+import time
+import urllib.parse
+from typing import Any, Dict, Optional, Tuple, Union, cast
+
+import dns.asyncbackend
+import dns.exception
+import dns.inet
+import dns.message
+import dns.name
+import dns.quic
+import dns.rcode
+import dns.rdataclass
+import dns.rdatatype
+import dns.transaction
+from dns._asyncbackend import NullContext
+from dns.query import (
+    BadResponse,
+    HTTPVersion,
+    NoDOH,
+    NoDOQ,
+    UDPMode,
+    _check_status,
+    _compute_times,
+    _make_dot_ssl_context,
+    _matches_destination,
+    _remaining,
+    have_doh,
+    ssl,
+)
+
+if have_doh:
+    import httpx
+
+# for brevity
+_lltuple = dns.inet.low_level_address_tuple
+
+
+def _source_tuple(af, address, port):
+    # Make a high level source tuple, or return None if address and port
+    # are both None
+    if address or port:
+        if address is None:
+            if af == socket.AF_INET:
+                address = "0.0.0.0"
+            elif af == socket.AF_INET6:
+                address = "::"
+            else:
+                raise NotImplementedError(f"unknown address family {af}")
+        return (address, port)
+    else:
+        return None
+
+
+def _timeout(expiration, now=None):
+    if expiration is not None:
+        if not now:
+            now = time.time()
+        return max(expiration - now, 0)
+    else:
+        return None
+
+
+async def send_udp(
+    sock: dns.asyncbackend.DatagramSocket,
+    what: Union[dns.message.Message, bytes],
+    destination: Any,
+    expiration: Optional[float] = None,
+) -> Tuple[int, float]:
+    """Send a DNS message to the specified UDP socket.
+
+    *sock*, a ``dns.asyncbackend.DatagramSocket``.
+
+    *what*, a ``bytes`` or ``dns.message.Message``, the message to send.
+
+    *destination*, a destination tuple appropriate for the address family
+    of the socket, specifying where to send the query.
+
+    *expiration*, a ``float`` or ``None``, the absolute time at which
+    a timeout exception should be raised.  If ``None``, no timeout will
+    occur.  The expiration value is meaningless for the asyncio backend, as
+    asyncio's transport sendto() never blocks.
+
+    Returns an ``(int, float)`` tuple of bytes sent and the sent time.
+    """
+
+    if isinstance(what, dns.message.Message):
+        what = what.to_wire()
+    sent_time = time.time()
+    n = await sock.sendto(what, destination, _timeout(expiration, sent_time))
+    return (n, sent_time)
+
+
+async def receive_udp(
+    sock: dns.asyncbackend.DatagramSocket,
+    destination: Optional[Any] = None,
+    expiration: Optional[float] = None,
+    ignore_unexpected: bool = False,
+    one_rr_per_rrset: bool = False,
+    keyring: Optional[Dict[dns.name.Name, dns.tsig.Key]] = None,
+    request_mac: Optional[bytes] = b"",
+    ignore_trailing: bool = False,
+    raise_on_truncation: bool = False,
+    ignore_errors: bool = False,
+    query: Optional[dns.message.Message] = None,
+) -> Any:
+    """Read a DNS message from a UDP socket.
+
+    *sock*, a ``dns.asyncbackend.DatagramSocket``.
+
+    See :py:func:`dns.query.receive_udp()` for the documentation of the other
+    parameters, and exceptions.
+
+    Returns a ``(dns.message.Message, float, tuple)`` tuple of the received message, the
+    received time, and the address where the message arrived from.
+    """
+
+    wire = b""
+    while True:
+        (wire, from_address) = await sock.recvfrom(65535, _timeout(expiration))
+        if not _matches_destination(
+            sock.family, from_address, destination, ignore_unexpected
+        ):
+            continue
+        received_time = time.time()
+        try:
+            r = dns.message.from_wire(
+                wire,
+                keyring=keyring,
+                request_mac=request_mac,
+                one_rr_per_rrset=one_rr_per_rrset,
+                ignore_trailing=ignore_trailing,
+                raise_on_truncation=raise_on_truncation,
+            )
+        except dns.message.Truncated as e:
+            # See the comment in query.py for details.
+            if (
+                ignore_errors
+                and query is not None
+                and not query.is_response(e.message())
+            ):
+                continue
+            else:
+                raise
+        except Exception:
+            if ignore_errors:
+                continue
+            else:
+                raise
+        if ignore_errors and query is not None and not query.is_response(r):
+            continue
+        return (r, received_time, from_address)
+
+
+async def udp(
+    q: dns.message.Message,
+    where: str,
+    timeout: Optional[float] = None,
+    port: int = 53,
+    source: Optional[str] = None,
+    source_port: int = 0,
+    ignore_unexpected: bool = False,
+    one_rr_per_rrset: bool = False,
+    ignore_trailing: bool = False,
+    raise_on_truncation: bool = False,
+    sock: Optional[dns.asyncbackend.DatagramSocket] = None,
+    backend: Optional[dns.asyncbackend.Backend] = None,
+    ignore_errors: bool = False,
+) -> dns.message.Message:
+    """Return the response obtained after sending a query via UDP.
+
+    *sock*, a ``dns.asyncbackend.DatagramSocket``, or ``None``,
+    the socket to use for the query.  If ``None``, the default, a
+    socket is created.  Note that if a socket is provided, the
+    *source*, *source_port*, and *backend* are ignored.
+
+    *backend*, a ``dns.asyncbackend.Backend``, or ``None``.  If ``None``,
+    the default, then dnspython will use the default backend.
+
+    See :py:func:`dns.query.udp()` for the documentation of the other
+    parameters, exceptions, and return type of this method.
+    """
+    wire = q.to_wire()
+    (begin_time, expiration) = _compute_times(timeout)
+    af = dns.inet.af_for_address(where)
+    destination = _lltuple((where, port), af)
+    if sock:
+        cm: contextlib.AbstractAsyncContextManager = NullContext(sock)
+    else:
+        if not backend:
+            backend = dns.asyncbackend.get_default_backend()
+        stuple = _source_tuple(af, source, source_port)
+        if backend.datagram_connection_required():
+            dtuple = (where, port)
+        else:
+            dtuple = None
+        cm = await backend.make_socket(af, socket.SOCK_DGRAM, 0, stuple, dtuple)
+    async with cm as s:
+        await send_udp(s, wire, destination, expiration)
+        (r, received_time, _) = await receive_udp(
+            s,
+            destination,
+            expiration,
+            ignore_unexpected,
+            one_rr_per_rrset,
+            q.keyring,
+            q.mac,
+            ignore_trailing,
+            raise_on_truncation,
+            ignore_errors,
+            q,
+        )
+        r.time = received_time - begin_time
+        # We don't need to check q.is_response() if we are in ignore_errors mode
+        # as receive_udp() will have checked it.
+        if not (ignore_errors or q.is_response(r)):
+            raise BadResponse
+        return r
+
+
+async def udp_with_fallback(
+    q: dns.message.Message,
+    where: str,
+    timeout: Optional[float] = None,
+    port: int = 53,
+    source: Optional[str] = None,
+    source_port: int = 0,
+    ignore_unexpected: bool = False,
+    one_rr_per_rrset: bool = False,
+    ignore_trailing: bool = False,
+    udp_sock: Optional[dns.asyncbackend.DatagramSocket] = None,
+    tcp_sock: Optional[dns.asyncbackend.StreamSocket] = None,
+    backend: Optional[dns.asyncbackend.Backend] = None,
+    ignore_errors: bool = False,
+) -> Tuple[dns.message.Message, bool]:
+    """Return the response to the query, trying UDP first and falling back
+    to TCP if UDP results in a truncated response.
+
+    *udp_sock*, a ``dns.asyncbackend.DatagramSocket``, or ``None``,
+    the socket to use for the UDP query.  If ``None``, the default, a
+    socket is created.  Note that if a socket is provided the *source*,
+    *source_port*, and *backend* are ignored for the UDP query.
+
+    *tcp_sock*, a ``dns.asyncbackend.StreamSocket``, or ``None``, the
+    socket to use for the TCP query.  If ``None``, the default, a
+    socket is created.  Note that if a socket is provided *where*,
+    *source*, *source_port*, and *backend*  are ignored for the TCP query.
+
+    *backend*, a ``dns.asyncbackend.Backend``, or ``None``.  If ``None``,
+    the default, then dnspython will use the default backend.
+
+    See :py:func:`dns.query.udp_with_fallback()` for the documentation
+    of the other parameters, exceptions, and return type of this
+    method.
+    """
+    try:
+        response = await udp(
+            q,
+            where,
+            timeout,
+            port,
+            source,
+            source_port,
+            ignore_unexpected,
+            one_rr_per_rrset,
+            ignore_trailing,
+            True,
+            udp_sock,
+            backend,
+            ignore_errors,
+        )
+        return (response, False)
+    except dns.message.Truncated:
+        response = await tcp(
+            q,
+            where,
+            timeout,
+            port,
+            source,
+            source_port,
+            one_rr_per_rrset,
+            ignore_trailing,
+            tcp_sock,
+            backend,
+        )
+        return (response, True)
+
+
+async def send_tcp(
+    sock: dns.asyncbackend.StreamSocket,
+    what: Union[dns.message.Message, bytes],
+    expiration: Optional[float] = None,
+) -> Tuple[int, float]:
+    """Send a DNS message to the specified TCP socket.
+
+    *sock*, a ``dns.asyncbackend.StreamSocket``.
+
+    See :py:func:`dns.query.send_tcp()` for the documentation of the other
+    parameters, exceptions, and return type of this method.
+    """
+
+    if isinstance(what, dns.message.Message):
+        tcpmsg = what.to_wire(prepend_length=True)
+    else:
+        # copying the wire into tcpmsg is inefficient, but lets us
+        # avoid writev() or doing a short write that would get pushed
+        # onto the net
+        tcpmsg = len(what).to_bytes(2, "big") + what
+    sent_time = time.time()
+    await sock.sendall(tcpmsg, _timeout(expiration, sent_time))
+    return (len(tcpmsg), sent_time)
+
+
+async def _read_exactly(sock, count, expiration):
+    """Read the specified number of bytes from stream.  Keep trying until we
+    either get the desired amount, or we hit EOF.
+    """
+    s = b""
+    while count > 0:
+        n = await sock.recv(count, _timeout(expiration))
+        if n == b"":
+            raise EOFError("EOF")
+        count = count - len(n)
+        s = s + n
+    return s
+
+
+async def receive_tcp(
+    sock: dns.asyncbackend.StreamSocket,
+    expiration: Optional[float] = None,
+    one_rr_per_rrset: bool = False,
+    keyring: Optional[Dict[dns.name.Name, dns.tsig.Key]] = None,
+    request_mac: Optional[bytes] = b"",
+    ignore_trailing: bool = False,
+) -> Tuple[dns.message.Message, float]:
+    """Read a DNS message from a TCP socket.
+
+    *sock*, a ``dns.asyncbackend.StreamSocket``.
+
+    See :py:func:`dns.query.receive_tcp()` for the documentation of the other
+    parameters, exceptions, and return type of this method.
+    """
+
+    ldata = await _read_exactly(sock, 2, expiration)
+    (l,) = struct.unpack("!H", ldata)
+    wire = await _read_exactly(sock, l, expiration)
+    received_time = time.time()
+    r = dns.message.from_wire(
+        wire,
+        keyring=keyring,
+        request_mac=request_mac,
+        one_rr_per_rrset=one_rr_per_rrset,
+        ignore_trailing=ignore_trailing,
+    )
+    return (r, received_time)
+
+
+async def tcp(
+    q: dns.message.Message,
+    where: str,
+    timeout: Optional[float] = None,
+    port: int = 53,
+    source: Optional[str] = None,
+    source_port: int = 0,
+    one_rr_per_rrset: bool = False,
+    ignore_trailing: bool = False,
+    sock: Optional[dns.asyncbackend.StreamSocket] = None,
+    backend: Optional[dns.asyncbackend.Backend] = None,
+) -> dns.message.Message:
+    """Return the response obtained after sending a query via TCP.
+
+    *sock*, a ``dns.asyncbacket.StreamSocket``, or ``None``, the
+    socket to use for the query.  If ``None``, the default, a socket
+    is created.  Note that if a socket is provided
+    *where*, *port*, *source*, *source_port*, and *backend* are ignored.
+
+    *backend*, a ``dns.asyncbackend.Backend``, or ``None``.  If ``None``,
+    the default, then dnspython will use the default backend.
+
+    See :py:func:`dns.query.tcp()` for the documentation of the other
+    parameters, exceptions, and return type of this method.
+    """
+
+    wire = q.to_wire()
+    (begin_time, expiration) = _compute_times(timeout)
+    if sock:
+        # Verify that the socket is connected, as if it's not connected,
+        # it's not writable, and the polling in send_tcp() will time out or
+        # hang forever.
+        await sock.getpeername()
+        cm: contextlib.AbstractAsyncContextManager = NullContext(sock)
+    else:
+        # These are simple (address, port) pairs, not family-dependent tuples
+        # you pass to low-level socket code.
+        af = dns.inet.af_for_address(where)
+        stuple = _source_tuple(af, source, source_port)
+        dtuple = (where, port)
+        if not backend:
+            backend = dns.asyncbackend.get_default_backend()
+        cm = await backend.make_socket(
+            af, socket.SOCK_STREAM, 0, stuple, dtuple, timeout
+        )
+    async with cm as s:
+        await send_tcp(s, wire, expiration)
+        (r, received_time) = await receive_tcp(
+            s, expiration, one_rr_per_rrset, q.keyring, q.mac, ignore_trailing
+        )
+        r.time = received_time - begin_time
+        if not q.is_response(r):
+            raise BadResponse
+        return r
+
+
+async def tls(
+    q: dns.message.Message,
+    where: str,
+    timeout: Optional[float] = None,
+    port: int = 853,
+    source: Optional[str] = None,
+    source_port: int = 0,
+    one_rr_per_rrset: bool = False,
+    ignore_trailing: bool = False,
+    sock: Optional[dns.asyncbackend.StreamSocket] = None,
+    backend: Optional[dns.asyncbackend.Backend] = None,
+    ssl_context: Optional[ssl.SSLContext] = None,
+    server_hostname: Optional[str] = None,
+    verify: Union[bool, str] = True,
+) -> dns.message.Message:
+    """Return the response obtained after sending a query via TLS.
+
+    *sock*, an ``asyncbackend.StreamSocket``, or ``None``, the socket
+    to use for the query.  If ``None``, the default, a socket is
+    created.  Note that if a socket is provided, it must be a
+    connected SSL stream socket, and *where*, *port*,
+    *source*, *source_port*, *backend*, *ssl_context*, and *server_hostname*
+    are ignored.
+
+    *backend*, a ``dns.asyncbackend.Backend``, or ``None``.  If ``None``,
+    the default, then dnspython will use the default backend.
+
+    See :py:func:`dns.query.tls()` for the documentation of the other
+    parameters, exceptions, and return type of this method.
+    """
+    (begin_time, expiration) = _compute_times(timeout)
+    if sock:
+        cm: contextlib.AbstractAsyncContextManager = NullContext(sock)
+    else:
+        if ssl_context is None:
+            ssl_context = _make_dot_ssl_context(server_hostname, verify)
+        af = dns.inet.af_for_address(where)
+        stuple = _source_tuple(af, source, source_port)
+        dtuple = (where, port)
+        if not backend:
+            backend = dns.asyncbackend.get_default_backend()
+        cm = await backend.make_socket(
+            af,
+            socket.SOCK_STREAM,
+            0,
+            stuple,
+            dtuple,
+            timeout,
+            ssl_context,
+            server_hostname,
+        )
+    async with cm as s:
+        timeout = _timeout(expiration)
+        response = await tcp(
+            q,
+            where,
+            timeout,
+            port,
+            source,
+            source_port,
+            one_rr_per_rrset,
+            ignore_trailing,
+            s,
+            backend,
+        )
+        end_time = time.time()
+        response.time = end_time - begin_time
+        return response
+
+
+def _maybe_get_resolver(
+    resolver: Optional["dns.asyncresolver.Resolver"],
+) -> "dns.asyncresolver.Resolver":
+    # We need a separate method for this to avoid overriding the global
+    # variable "dns" with the as-yet undefined local variable "dns"
+    # in https().
+    if resolver is None:
+        # pylint: disable=import-outside-toplevel,redefined-outer-name
+        import dns.asyncresolver
+
+        resolver = dns.asyncresolver.Resolver()
+    return resolver
+
+
+async def https(
+    q: dns.message.Message,
+    where: str,
+    timeout: Optional[float] = None,
+    port: int = 443,
+    source: Optional[str] = None,
+    source_port: int = 0,  # pylint: disable=W0613
+    one_rr_per_rrset: bool = False,
+    ignore_trailing: bool = False,
+    client: Optional["httpx.AsyncClient"] = None,
+    path: str = "/dns-query",
+    post: bool = True,
+    verify: Union[bool, str] = True,
+    bootstrap_address: Optional[str] = None,
+    resolver: Optional["dns.asyncresolver.Resolver"] = None,
+    family: int = socket.AF_UNSPEC,
+    http_version: HTTPVersion = HTTPVersion.DEFAULT,
+) -> dns.message.Message:
+    """Return the response obtained after sending a query via DNS-over-HTTPS.
+
+    *client*, a ``httpx.AsyncClient``.  If provided, the client to use for
+    the query.
+
+    Unlike the other dnspython async functions, a backend cannot be provided
+    in this function because httpx always auto-detects the async backend.
+
+    See :py:func:`dns.query.https()` for the documentation of the other
+    parameters, exceptions, and return type of this method.
+    """
+
+    try:
+        af = dns.inet.af_for_address(where)
+    except ValueError:
+        af = None
+    if af is not None and dns.inet.is_address(where):
+        if af == socket.AF_INET:
+            url = f"https://{where}:{port}{path}"
+        elif af == socket.AF_INET6:
+            url = f"https://[{where}]:{port}{path}"
+    else:
+        url = where
+
+    extensions = {}
+    if bootstrap_address is None:
+        # pylint: disable=possibly-used-before-assignment
+        parsed = urllib.parse.urlparse(url)
+        if parsed.hostname is None:
+            raise ValueError("no hostname in URL")
+        if dns.inet.is_address(parsed.hostname):
+            bootstrap_address = parsed.hostname
+            extensions["sni_hostname"] = parsed.hostname
+        if parsed.port is not None:
+            port = parsed.port
+
+    if http_version == HTTPVersion.H3 or (
+        http_version == HTTPVersion.DEFAULT and not have_doh
+    ):
+        if bootstrap_address is None:
+            resolver = _maybe_get_resolver(resolver)
+            assert parsed.hostname is not None  # for mypy
+            answers = await resolver.resolve_name(parsed.hostname, family)
+            bootstrap_address = random.choice(list(answers.addresses()))
+        return await _http3(
+            q,
+            bootstrap_address,
+            url,
+            timeout,
+            port,
+            source,
+            source_port,
+            one_rr_per_rrset,
+            ignore_trailing,
+            verify=verify,
+            post=post,
+        )
+
+    if not have_doh:
+        raise NoDOH  # pragma: no cover
+    # pylint: disable=possibly-used-before-assignment
+    if client and not isinstance(client, httpx.AsyncClient):
+        raise ValueError("session parameter must be an httpx.AsyncClient")
+    # pylint: enable=possibly-used-before-assignment
+
+    wire = q.to_wire()
+    headers = {"accept": "application/dns-message"}
+
+    h1 = http_version in (HTTPVersion.H1, HTTPVersion.DEFAULT)
+    h2 = http_version in (HTTPVersion.H2, HTTPVersion.DEFAULT)
+
+    backend = dns.asyncbackend.get_default_backend()
+
+    if source is None:
+        local_address = None
+        local_port = 0
+    else:
+        local_address = source
+        local_port = source_port
+
+    if client:
+        cm: contextlib.AbstractAsyncContextManager = NullContext(client)
+    else:
+        transport = backend.get_transport_class()(
+            local_address=local_address,
+            http1=h1,
+            http2=h2,
+            verify=verify,
+            local_port=local_port,
+            bootstrap_address=bootstrap_address,
+            resolver=resolver,
+            family=family,
+        )
+
+        cm = httpx.AsyncClient(http1=h1, http2=h2, verify=verify, transport=transport)
+
+    async with cm as the_client:
+        # see https://tools.ietf.org/html/rfc8484#section-4.1.1 for DoH
+        # GET and POST examples
+        if post:
+            headers.update(
+                {
+                    "content-type": "application/dns-message",
+                    "content-length": str(len(wire)),
+                }
+            )
+            response = await backend.wait_for(
+                the_client.post(
+                    url,
+                    headers=headers,
+                    content=wire,
+                    extensions=extensions,
+                ),
+                timeout,
+            )
+        else:
+            wire = base64.urlsafe_b64encode(wire).rstrip(b"=")
+            twire = wire.decode()  # httpx does a repr() if we give it bytes
+            response = await backend.wait_for(
+                the_client.get(
+                    url,
+                    headers=headers,
+                    params={"dns": twire},
+                    extensions=extensions,
+                ),
+                timeout,
+            )
+
+    # see https://tools.ietf.org/html/rfc8484#section-4.2.1 for info about DoH
+    # status codes
+    if response.status_code < 200 or response.status_code > 299:
+        raise ValueError(
+            f"{where} responded with status code {response.status_code}"
+            f"\nResponse body: {response.content!r}"
+        )
+    r = dns.message.from_wire(
+        response.content,
+        keyring=q.keyring,
+        request_mac=q.request_mac,
+        one_rr_per_rrset=one_rr_per_rrset,
+        ignore_trailing=ignore_trailing,
+    )
+    r.time = response.elapsed.total_seconds()
+    if not q.is_response(r):
+        raise BadResponse
+    return r
+
+
+async def _http3(
+    q: dns.message.Message,
+    where: str,
+    url: str,
+    timeout: Optional[float] = None,
+    port: int = 853,
+    source: Optional[str] = None,
+    source_port: int = 0,
+    one_rr_per_rrset: bool = False,
+    ignore_trailing: bool = False,
+    verify: Union[bool, str] = True,
+    backend: Optional[dns.asyncbackend.Backend] = None,
+    hostname: Optional[str] = None,
+    post: bool = True,
+) -> dns.message.Message:
+    if not dns.quic.have_quic:
+        raise NoDOH("DNS-over-HTTP3 is not available.")  # pragma: no cover
+
+    url_parts = urllib.parse.urlparse(url)
+    hostname = url_parts.hostname
+    if url_parts.port is not None:
+        port = url_parts.port
+
+    q.id = 0
+    wire = q.to_wire()
+    (cfactory, mfactory) = dns.quic.factories_for_backend(backend)
+
+    async with cfactory() as context:
+        async with mfactory(
+            context, verify_mode=verify, server_name=hostname, h3=True
+        ) as the_manager:
+            the_connection = the_manager.connect(where, port, source, source_port)
+            (start, expiration) = _compute_times(timeout)
+            stream = await the_connection.make_stream(timeout)
+            async with stream:
+                # note that send_h3() does not need await
+                stream.send_h3(url, wire, post)
+                wire = await stream.receive(_remaining(expiration))
+                _check_status(stream.headers(), where, wire)
+            finish = time.time()
+        r = dns.message.from_wire(
+            wire,
+            keyring=q.keyring,
+            request_mac=q.request_mac,
+            one_rr_per_rrset=one_rr_per_rrset,
+            ignore_trailing=ignore_trailing,
+        )
+    r.time = max(finish - start, 0.0)
+    if not q.is_response(r):
+        raise BadResponse
+    return r
+
+
+async def quic(
+    q: dns.message.Message,
+    where: str,
+    timeout: Optional[float] = None,
+    port: int = 853,
+    source: Optional[str] = None,
+    source_port: int = 0,
+    one_rr_per_rrset: bool = False,
+    ignore_trailing: bool = False,
+    connection: Optional[dns.quic.AsyncQuicConnection] = None,
+    verify: Union[bool, str] = True,
+    backend: Optional[dns.asyncbackend.Backend] = None,
+    hostname: Optional[str] = None,
+    server_hostname: Optional[str] = None,
+) -> dns.message.Message:
+    """Return the response obtained after sending an asynchronous query via
+    DNS-over-QUIC.
+
+    *backend*, a ``dns.asyncbackend.Backend``, or ``None``.  If ``None``,
+    the default, then dnspython will use the default backend.
+
+    See :py:func:`dns.query.quic()` for the documentation of the other
+    parameters, exceptions, and return type of this method.
+    """
+
+    if not dns.quic.have_quic:
+        raise NoDOQ("DNS-over-QUIC is not available.")  # pragma: no cover
+
+    if server_hostname is not None and hostname is None:
+        hostname = server_hostname
+
+    q.id = 0
+    wire = q.to_wire()
+    the_connection: dns.quic.AsyncQuicConnection
+    if connection:
+        cfactory = dns.quic.null_factory
+        mfactory = dns.quic.null_factory
+        the_connection = connection
+    else:
+        (cfactory, mfactory) = dns.quic.factories_for_backend(backend)
+
+    async with cfactory() as context:
+        async with mfactory(
+            context,
+            verify_mode=verify,
+            server_name=server_hostname,
+        ) as the_manager:
+            if not connection:
+                the_connection = the_manager.connect(where, port, source, source_port)
+            (start, expiration) = _compute_times(timeout)
+            stream = await the_connection.make_stream(timeout)
+            async with stream:
+                await stream.send(wire, True)
+                wire = await stream.receive(_remaining(expiration))
+            finish = time.time()
+        r = dns.message.from_wire(
+            wire,
+            keyring=q.keyring,
+            request_mac=q.request_mac,
+            one_rr_per_rrset=one_rr_per_rrset,
+            ignore_trailing=ignore_trailing,
+        )
+    r.time = max(finish - start, 0.0)
+    if not q.is_response(r):
+        raise BadResponse
+    return r
+
+
+async def _inbound_xfr(
+    txn_manager: dns.transaction.TransactionManager,
+    s: dns.asyncbackend.Socket,
+    query: dns.message.Message,
+    serial: Optional[int],
+    timeout: Optional[float],
+    expiration: float,
+) -> Any:
+    """Given a socket, does the zone transfer."""
+    rdtype = query.question[0].rdtype
+    is_ixfr = rdtype == dns.rdatatype.IXFR
+    origin = txn_manager.from_wire_origin()
+    wire = query.to_wire()
+    is_udp = s.type == socket.SOCK_DGRAM
+    if is_udp:
+        udp_sock = cast(dns.asyncbackend.DatagramSocket, s)
+        await udp_sock.sendto(wire, None, _timeout(expiration))
+    else:
+        tcp_sock = cast(dns.asyncbackend.StreamSocket, s)
+        tcpmsg = struct.pack("!H", len(wire)) + wire
+        await tcp_sock.sendall(tcpmsg, expiration)
+    with dns.xfr.Inbound(txn_manager, rdtype, serial, is_udp) as inbound:
+        done = False
+        tsig_ctx = None
+        while not done:
+            (_, mexpiration) = _compute_times(timeout)
+            if mexpiration is None or (
+                expiration is not None and mexpiration > expiration
+            ):
+                mexpiration = expiration
+            if is_udp:
+                timeout = _timeout(mexpiration)
+                (rwire, _) = await udp_sock.recvfrom(65535, timeout)
+            else:
+                ldata = await _read_exactly(tcp_sock, 2, mexpiration)
+                (l,) = struct.unpack("!H", ldata)
+                rwire = await _read_exactly(tcp_sock, l, mexpiration)
+            r = dns.message.from_wire(
+                rwire,
+                keyring=query.keyring,
+                request_mac=query.mac,
+                xfr=True,
+                origin=origin,
+                tsig_ctx=tsig_ctx,
+                multi=(not is_udp),
+                one_rr_per_rrset=is_ixfr,
+            )
+            done = inbound.process_message(r)
+            yield r
+            tsig_ctx = r.tsig_ctx
+        if query.keyring and not r.had_tsig:
+            raise dns.exception.FormError("missing TSIG")
+
+
+async def inbound_xfr(
+    where: str,
+    txn_manager: dns.transaction.TransactionManager,
+    query: Optional[dns.message.Message] = None,
+    port: int = 53,
+    timeout: Optional[float] = None,
+    lifetime: Optional[float] = None,
+    source: Optional[str] = None,
+    source_port: int = 0,
+    udp_mode: UDPMode = UDPMode.NEVER,
+    backend: Optional[dns.asyncbackend.Backend] = None,
+) -> None:
+    """Conduct an inbound transfer and apply it via a transaction from the
+    txn_manager.
+
+    *backend*, a ``dns.asyncbackend.Backend``, or ``None``.  If ``None``,
+    the default, then dnspython will use the default backend.
+
+    See :py:func:`dns.query.inbound_xfr()` for the documentation of
+    the other parameters, exceptions, and return type of this method.
+    """
+    if query is None:
+        (query, serial) = dns.xfr.make_query(txn_manager)
+    else:
+        serial = dns.xfr.extract_serial_from_query(query)
+    af = dns.inet.af_for_address(where)
+    stuple = _source_tuple(af, source, source_port)
+    dtuple = (where, port)
+    if not backend:
+        backend = dns.asyncbackend.get_default_backend()
+    (_, expiration) = _compute_times(lifetime)
+    if query.question[0].rdtype == dns.rdatatype.IXFR and udp_mode != UDPMode.NEVER:
+        s = await backend.make_socket(
+            af, socket.SOCK_DGRAM, 0, stuple, dtuple, _timeout(expiration)
+        )
+        async with s:
+            try:
+                async for _ in _inbound_xfr(
+                    txn_manager, s, query, serial, timeout, expiration
+                ):
+                    pass
+                return
+            except dns.xfr.UseTCP:
+                if udp_mode == UDPMode.ONLY:
+                    raise
+
+    s = await backend.make_socket(
+        af, socket.SOCK_STREAM, 0, stuple, dtuple, _timeout(expiration)
+    )
+    async with s:
+        async for _ in _inbound_xfr(txn_manager, s, query, serial, timeout, expiration):
+            pass

vllm/lib/python3.10/site-packages/dns/enum.py

@@ -0,0 +1,116 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+# Copyright (C) 2003-2017 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import enum
+from typing import Type, TypeVar, Union
+
+TIntEnum = TypeVar("TIntEnum", bound="IntEnum")
+
+
+class IntEnum(enum.IntEnum):
+    @classmethod
+    def _missing_(cls, value):
+        cls._check_value(value)
+        val = int.__new__(cls, value)
+        val._name_ = cls._extra_to_text(value, None) or f"{cls._prefix()}{value}"
+        val._value_ = value
+        return val
+
+    @classmethod
+    def _check_value(cls, value):
+        max = cls._maximum()
+        if not isinstance(value, int):
+            raise TypeError
+        if value < 0 or value > max:
+            name = cls._short_name()
+            raise ValueError(f"{name} must be an int between >= 0 and <= {max}")
+
+    @classmethod
+    def from_text(cls: Type[TIntEnum], text: str) -> TIntEnum:
+        text = text.upper()
+        try:
+            return cls[text]
+        except KeyError:
+            pass
+        value = cls._extra_from_text(text)
+        if value:
+            return value
+        prefix = cls._prefix()
+        if text.startswith(prefix) and text[len(prefix) :].isdigit():
+            value = int(text[len(prefix) :])
+            cls._check_value(value)
+            try:
+                return cls(value)
+            except ValueError:
+                return value
+        raise cls._unknown_exception_class()
+
+    @classmethod
+    def to_text(cls: Type[TIntEnum], value: int) -> str:
+        cls._check_value(value)
+        try:
+            text = cls(value).name
+        except ValueError:
+            text = None
+        text = cls._extra_to_text(value, text)
+        if text is None:
+            text = f"{cls._prefix()}{value}"
+        return text
+
+    @classmethod
+    def make(cls: Type[TIntEnum], value: Union[int, str]) -> TIntEnum:
+        """Convert text or a value into an enumerated type, if possible.
+
+        *value*, the ``int`` or ``str`` to convert.
+
+        Raises a class-specific exception if a ``str`` is provided that
+        cannot be converted.
+
+        Raises ``ValueError`` if the value is out of range.
+
+        Returns an enumeration from the calling class corresponding to the
+        value, if one is defined, or an ``int`` otherwise.
+        """
+
+        if isinstance(value, str):
+            return cls.from_text(value)
+        cls._check_value(value)
+        return cls(value)
+
+    @classmethod
+    def _maximum(cls):
+        raise NotImplementedError  # pragma: no cover
+
+    @classmethod
+    def _short_name(cls):
+        return cls.__name__.lower()
+
+    @classmethod
+    def _prefix(cls):
+        return ""
+
+    @classmethod
+    def _extra_from_text(cls, text):  # pylint: disable=W0613
+        return None
+
+    @classmethod
+    def _extra_to_text(cls, value, current_text):  # pylint: disable=W0613
+        return current_text
+
+    @classmethod
+    def _unknown_exception_class(cls):
+        return ValueError

vllm/lib/python3.10/site-packages/dns/exception.py

@@ -0,0 +1,169 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+# Copyright (C) 2003-2017 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""Common DNS Exceptions.
+
+Dnspython modules may also define their own exceptions, which will
+always be subclasses of ``DNSException``.
+"""
+
+
+from typing import Optional, Set
+
+
+class DNSException(Exception):
+    """Abstract base class shared by all dnspython exceptions.
+
+    It supports two basic modes of operation:
+
+    a) Old/compatible mode is used if ``__init__`` was called with
+    empty *kwargs*.  In compatible mode all *args* are passed
+    to the standard Python Exception class as before and all *args* are
+    printed by the standard ``__str__`` implementation.  Class variable
+    ``msg`` (or doc string if ``msg`` is ``None``) is returned from ``str()``
+    if *args* is empty.
+
+    b) New/parametrized mode is used if ``__init__`` was called with
+    non-empty *kwargs*.
+    In the new mode *args* must be empty and all kwargs must match
+    those set in class variable ``supp_kwargs``. All kwargs are stored inside
+    ``self.kwargs`` and used in a new ``__str__`` implementation to construct
+    a formatted message based on the ``fmt`` class variable, a ``string``.
+
+    In the simplest case it is enough to override the ``supp_kwargs``
+    and ``fmt`` class variables to get nice parametrized messages.
+    """
+
+    msg: Optional[str] = None  # non-parametrized message
+    supp_kwargs: Set[str] = set()  # accepted parameters for _fmt_kwargs (sanity check)
+    fmt: Optional[str] = None  # message parametrized with results from _fmt_kwargs
+
+    def __init__(self, *args, **kwargs):
+        self._check_params(*args, **kwargs)
+        if kwargs:
+            # This call to a virtual method from __init__ is ok in our usage
+            self.kwargs = self._check_kwargs(**kwargs)  # lgtm[py/init-calls-subclass]
+            self.msg = str(self)
+        else:
+            self.kwargs = dict()  # defined but empty for old mode exceptions
+        if self.msg is None:
+            # doc string is better implicit message than empty string
+            self.msg = self.__doc__
+        if args:
+            super().__init__(*args)
+        else:
+            super().__init__(self.msg)
+
+    def _check_params(self, *args, **kwargs):
+        """Old exceptions supported only args and not kwargs.
+
+        For sanity we do not allow to mix old and new behavior."""
+        if args or kwargs:
+            assert bool(args) != bool(
+                kwargs
+            ), "keyword arguments are mutually exclusive with positional args"
+
+    def _check_kwargs(self, **kwargs):
+        if kwargs:
+            assert (
+                set(kwargs.keys()) == self.supp_kwargs
+            ), f"following set of keyword args is required: {self.supp_kwargs}"
+        return kwargs
+
+    def _fmt_kwargs(self, **kwargs):
+        """Format kwargs before printing them.
+
+        Resulting dictionary has to have keys necessary for str.format call
+        on fmt class variable.
+        """
+        fmtargs = {}
+        for kw, data in kwargs.items():
+            if isinstance(data, (list, set)):
+                # convert list of <someobj> to list of str(<someobj>)
+                fmtargs[kw] = list(map(str, data))
+                if len(fmtargs[kw]) == 1:
+                    # remove list brackets [] from single-item lists
+                    fmtargs[kw] = fmtargs[kw].pop()
+            else:
+                fmtargs[kw] = data
+        return fmtargs
+
+    def __str__(self):
+        if self.kwargs and self.fmt:
+            # provide custom message constructed from keyword arguments
+            fmtargs = self._fmt_kwargs(**self.kwargs)
+            return self.fmt.format(**fmtargs)
+        else:
+            # print *args directly in the same way as old DNSException
+            return super().__str__()
+
+
+class FormError(DNSException):
+    """DNS message is malformed."""
+
+
+class SyntaxError(DNSException):
+    """Text input is malformed."""
+
+
+class UnexpectedEnd(SyntaxError):
+    """Text input ended unexpectedly."""
+
+
+class TooBig(DNSException):
+    """The DNS message is too big."""
+
+
+class Timeout(DNSException):
+    """The DNS operation timed out."""
+
+    supp_kwargs = {"timeout"}
+    fmt = "The DNS operation timed out after {timeout:.3f} seconds"
+
+    # We do this as otherwise mypy complains about unexpected keyword argument
+    # idna_exception
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+
+class UnsupportedAlgorithm(DNSException):
+    """The DNSSEC algorithm is not supported."""
+
+
+class AlgorithmKeyMismatch(UnsupportedAlgorithm):
+    """The DNSSEC algorithm is not supported for the given key type."""
+
+
+class ValidationFailure(DNSException):
+    """The DNSSEC signature is invalid."""
+
+
+class DeniedByPolicy(DNSException):
+    """Denied by DNSSEC policy."""
+
+
+class ExceptionWrapper:
+    def __init__(self, exception_class):
+        self.exception_class = exception_class
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        if exc_type is not None and not isinstance(exc_val, self.exception_class):
+            raise self.exception_class(str(exc_val)) from exc_val
+        return False

vllm/lib/python3.10/site-packages/dns/name.py

@@ -0,0 +1,1284 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+# Copyright (C) 2001-2017 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS Names.
+"""
+
+import copy
+import encodings.idna  # type: ignore
+import functools
+import struct
+from typing import Any, Callable, Dict, Iterable, Optional, Tuple, Union
+
+import dns._features
+import dns.enum
+import dns.exception
+import dns.immutable
+import dns.wire
+
+if dns._features.have("idna"):
+    import idna  # type: ignore
+
+    have_idna_2008 = True
+else:  # pragma: no cover
+    have_idna_2008 = False
+
+CompressType = Dict["Name", int]
+
+
+class NameRelation(dns.enum.IntEnum):
+    """Name relation result from fullcompare()."""
+
+    # This is an IntEnum for backwards compatibility in case anyone
+    # has hardwired the constants.
+
+    #: The compared names have no relationship to each other.
+    NONE = 0
+    #: the first name is a superdomain of the second.
+    SUPERDOMAIN = 1
+    #: The first name is a subdomain of the second.
+    SUBDOMAIN = 2
+    #: The compared names are equal.
+    EQUAL = 3
+    #: The compared names have a common ancestor.
+    COMMONANCESTOR = 4
+
+    @classmethod
+    def _maximum(cls):
+        return cls.COMMONANCESTOR  # pragma: no cover
+
+    @classmethod
+    def _short_name(cls):
+        return cls.__name__  # pragma: no cover
+
+
+# Backwards compatibility
+NAMERELN_NONE = NameRelation.NONE
+NAMERELN_SUPERDOMAIN = NameRelation.SUPERDOMAIN
+NAMERELN_SUBDOMAIN = NameRelation.SUBDOMAIN
+NAMERELN_EQUAL = NameRelation.EQUAL
+NAMERELN_COMMONANCESTOR = NameRelation.COMMONANCESTOR
+
+
+class EmptyLabel(dns.exception.SyntaxError):
+    """A DNS label is empty."""
+
+
+class BadEscape(dns.exception.SyntaxError):
+    """An escaped code in a text format of DNS name is invalid."""
+
+
+class BadPointer(dns.exception.FormError):
+    """A DNS compression pointer points forward instead of backward."""
+
+
+class BadLabelType(dns.exception.FormError):
+    """The label type in DNS name wire format is unknown."""
+
+
+class NeedAbsoluteNameOrOrigin(dns.exception.DNSException):
+    """An attempt was made to convert a non-absolute name to
+    wire when there was also a non-absolute (or missing) origin."""
+
+
+class NameTooLong(dns.exception.FormError):
+    """A DNS name is > 255 octets long."""
+
+
+class LabelTooLong(dns.exception.SyntaxError):
+    """A DNS label is > 63 octets long."""
+
+
+class AbsoluteConcatenation(dns.exception.DNSException):
+    """An attempt was made to append anything other than the
+    empty name to an absolute DNS name."""
+
+
+class NoParent(dns.exception.DNSException):
+    """An attempt was made to get the parent of the root name
+    or the empty name."""
+
+
+class NoIDNA2008(dns.exception.DNSException):
+    """IDNA 2008 processing was requested but the idna module is not
+    available."""
+
+
+class IDNAException(dns.exception.DNSException):
+    """IDNA processing raised an exception."""
+
+    supp_kwargs = {"idna_exception"}
+    fmt = "IDNA processing exception: {idna_exception}"
+
+    # We do this as otherwise mypy complains about unexpected keyword argument
+    # idna_exception
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+
+class NeedSubdomainOfOrigin(dns.exception.DNSException):
+    """An absolute name was provided that is not a subdomain of the specified origin."""
+
+
+_escaped = b'"().;\\@$'
+_escaped_text = '"().;\\@$'
+
+
+def _escapify(label: Union[bytes, str]) -> str:
+    """Escape the characters in label which need it.
+    @returns: the escaped string
+    @rtype: string"""
+    if isinstance(label, bytes):
+        # Ordinary DNS label mode.  Escape special characters and values
+        # < 0x20 or > 0x7f.
+        text = ""
+        for c in label:
+            if c in _escaped:
+                text += "\\" + chr(c)
+            elif c > 0x20 and c < 0x7F:
+                text += chr(c)
+            else:
+                text += "\\%03d" % c
+        return text
+
+    # Unicode label mode.  Escape only special characters and values < 0x20
+    text = ""
+    for uc in label:
+        if uc in _escaped_text:
+            text += "\\" + uc
+        elif uc <= "\x20":
+            text += "\\%03d" % ord(uc)
+        else:
+            text += uc
+    return text
+
+
+class IDNACodec:
+    """Abstract base class for IDNA encoder/decoders."""
+
+    def __init__(self):
+        pass
+
+    def is_idna(self, label: bytes) -> bool:
+        return label.lower().startswith(b"xn--")
+
+    def encode(self, label: str) -> bytes:
+        raise NotImplementedError  # pragma: no cover
+
+    def decode(self, label: bytes) -> str:
+        # We do not apply any IDNA policy on decode.
+        if self.is_idna(label):
+            try:
+                slabel = label[4:].decode("punycode")
+                return _escapify(slabel)
+            except Exception as e:
+                raise IDNAException(idna_exception=e)
+        else:
+            return _escapify(label)
+
+
+class IDNA2003Codec(IDNACodec):
+    """IDNA 2003 encoder/decoder."""
+
+    def __init__(self, strict_decode: bool = False):
+        """Initialize the IDNA 2003 encoder/decoder.
+
+        *strict_decode* is a ``bool``. If `True`, then IDNA2003 checking
+        is done when decoding.  This can cause failures if the name
+        was encoded with IDNA2008.  The default is `False`.
+        """
+
+        super().__init__()
+        self.strict_decode = strict_decode
+
+    def encode(self, label: str) -> bytes:
+        """Encode *label*."""
+
+        if label == "":
+            return b""
+        try:
+            return encodings.idna.ToASCII(label)
+        except UnicodeError:
+            raise LabelTooLong
+
+    def decode(self, label: bytes) -> str:
+        """Decode *label*."""
+        if not self.strict_decode:
+            return super().decode(label)
+        if label == b"":
+            return ""
+        try:
+            return _escapify(encodings.idna.ToUnicode(label))
+        except Exception as e:
+            raise IDNAException(idna_exception=e)
+
+
+class IDNA2008Codec(IDNACodec):
+    """IDNA 2008 encoder/decoder."""
+
+    def __init__(
+        self,
+        uts_46: bool = False,
+        transitional: bool = False,
+        allow_pure_ascii: bool = False,
+        strict_decode: bool = False,
+    ):
+        """Initialize the IDNA 2008 encoder/decoder.
+
+        *uts_46* is a ``bool``.  If True, apply Unicode IDNA
+        compatibility processing as described in Unicode Technical
+        Standard #46 (https://unicode.org/reports/tr46/).
+        If False, do not apply the mapping.  The default is False.
+
+        *transitional* is a ``bool``: If True, use the
+        "transitional" mode described in Unicode Technical Standard
+        #46.  The default is False.
+
+        *allow_pure_ascii* is a ``bool``.  If True, then a label which
+        consists of only ASCII characters is allowed.  This is less
+        strict than regular IDNA 2008, but is also necessary for mixed
+        names, e.g. a name with starting with "_sip._tcp." and ending
+        in an IDN suffix which would otherwise be disallowed.  The
+        default is False.
+
+        *strict_decode* is a ``bool``: If True, then IDNA2008 checking
+        is done when decoding.  This can cause failures if the name
+        was encoded with IDNA2003.  The default is False.
+        """
+        super().__init__()
+        self.uts_46 = uts_46
+        self.transitional = transitional
+        self.allow_pure_ascii = allow_pure_ascii
+        self.strict_decode = strict_decode
+
+    def encode(self, label: str) -> bytes:
+        if label == "":
+            return b""
+        if self.allow_pure_ascii and is_all_ascii(label):
+            encoded = label.encode("ascii")
+            if len(encoded) > 63:
+                raise LabelTooLong
+            return encoded
+        if not have_idna_2008:
+            raise NoIDNA2008
+        try:
+            if self.uts_46:
+                # pylint: disable=possibly-used-before-assignment
+                label = idna.uts46_remap(label, False, self.transitional)
+            return idna.alabel(label)
+        except idna.IDNAError as e:
+            if e.args[0] == "Label too long":
+                raise LabelTooLong
+            else:
+                raise IDNAException(idna_exception=e)
+
+    def decode(self, label: bytes) -> str:
+        if not self.strict_decode:
+            return super().decode(label)
+        if label == b"":
+            return ""
+        if not have_idna_2008:
+            raise NoIDNA2008
+        try:
+            ulabel = idna.ulabel(label)
+            if self.uts_46:
+                ulabel = idna.uts46_remap(ulabel, False, self.transitional)
+            return _escapify(ulabel)
+        except (idna.IDNAError, UnicodeError) as e:
+            raise IDNAException(idna_exception=e)
+
+
+IDNA_2003_Practical = IDNA2003Codec(False)
+IDNA_2003_Strict = IDNA2003Codec(True)
+IDNA_2003 = IDNA_2003_Practical
+IDNA_2008_Practical = IDNA2008Codec(True, False, True, False)
+IDNA_2008_UTS_46 = IDNA2008Codec(True, False, False, False)
+IDNA_2008_Strict = IDNA2008Codec(False, False, False, True)
+IDNA_2008_Transitional = IDNA2008Codec(True, True, False, False)
+IDNA_2008 = IDNA_2008_Practical
+
+
+def _validate_labels(labels: Tuple[bytes, ...]) -> None:
+    """Check for empty labels in the middle of a label sequence,
+    labels that are too long, and for too many labels.
+
+    Raises ``dns.name.NameTooLong`` if the name as a whole is too long.
+
+    Raises ``dns.name.EmptyLabel`` if a label is empty (i.e. the root
+    label) and appears in a position other than the end of the label
+    sequence
+
+    """
+
+    l = len(labels)
+    total = 0
+    i = -1
+    j = 0
+    for label in labels:
+        ll = len(label)
+        total += ll + 1
+        if ll > 63:
+            raise LabelTooLong
+        if i < 0 and label == b"":
+            i = j
+        j += 1
+    if total > 255:
+        raise NameTooLong
+    if i >= 0 and i != l - 1:
+        raise EmptyLabel
+
+
+def _maybe_convert_to_binary(label: Union[bytes, str]) -> bytes:
+    """If label is ``str``, convert it to ``bytes``.  If it is already
+    ``bytes`` just return it.
+
+    """
+
+    if isinstance(label, bytes):
+        return label
+    if isinstance(label, str):
+        return label.encode()
+    raise ValueError  # pragma: no cover
+
+
+@dns.immutable.immutable
+class Name:
+    """A DNS name.
+
+    The dns.name.Name class represents a DNS name as a tuple of
+    labels.  Each label is a ``bytes`` in DNS wire format.  Instances
+    of the class are immutable.
+    """
+
+    __slots__ = ["labels"]
+
+    def __init__(self, labels: Iterable[Union[bytes, str]]):
+        """*labels* is any iterable whose values are ``str`` or ``bytes``."""
+
+        blabels = [_maybe_convert_to_binary(x) for x in labels]
+        self.labels = tuple(blabels)
+        _validate_labels(self.labels)
+
+    def __copy__(self):
+        return Name(self.labels)
+
+    def __deepcopy__(self, memo):
+        return Name(copy.deepcopy(self.labels, memo))
+
+    def __getstate__(self):
+        # Names can be pickled
+        return {"labels": self.labels}
+
+    def __setstate__(self, state):
+        super().__setattr__("labels", state["labels"])
+        _validate_labels(self.labels)
+
+    def is_absolute(self) -> bool:
+        """Is the most significant label of this name the root label?
+
+        Returns a ``bool``.
+        """
+
+        return len(self.labels) > 0 and self.labels[-1] == b""
+
+    def is_wild(self) -> bool:
+        """Is this name wild?  (I.e. Is the least significant label '*'?)
+
+        Returns a ``bool``.
+        """
+
+        return len(self.labels) > 0 and self.labels[0] == b"*"
+
+    def __hash__(self) -> int:
+        """Return a case-insensitive hash of the name.
+
+        Returns an ``int``.
+        """
+
+        h = 0
+        for label in self.labels:
+            for c in label.lower():
+                h += (h << 3) + c
+        return h
+
+    def fullcompare(self, other: "Name") -> Tuple[NameRelation, int, int]:
+        """Compare two names, returning a 3-tuple
+        ``(relation, order, nlabels)``.
+
+        *relation* describes the relation ship between the names,
+        and is one of: ``dns.name.NameRelation.NONE``,
+        ``dns.name.NameRelation.SUPERDOMAIN``, ``dns.name.NameRelation.SUBDOMAIN``,
+        ``dns.name.NameRelation.EQUAL``, or ``dns.name.NameRelation.COMMONANCESTOR``.
+
+        *order* is < 0 if *self* < *other*, > 0 if *self* > *other*, and ==
+        0 if *self* == *other*.  A relative name is always less than an
+        absolute name.  If both names have the same relativity, then
+        the DNSSEC order relation is used to order them.
+
+        *nlabels* is the number of significant labels that the two names
+        have in common.
+
+        Here are some examples.  Names ending in "." are absolute names,
+        those not ending in "." are relative names.
+
+        =============  =============  ===========  =====  =======
+        self           other          relation     order  nlabels
+        =============  =============  ===========  =====  =======
+        www.example.   www.example.   equal        0      3
+        www.example.   example.       subdomain    > 0    2
+        example.       www.example.   superdomain  < 0    2
+        example1.com.  example2.com.  common anc.  < 0    2
+        example1       example2.      none         < 0    0
+        example1.      example2       none         > 0    0
+        =============  =============  ===========  =====  =======
+        """
+
+        sabs = self.is_absolute()
+        oabs = other.is_absolute()
+        if sabs != oabs:
+            if sabs:
+                return (NameRelation.NONE, 1, 0)
+            else:
+                return (NameRelation.NONE, -1, 0)
+        l1 = len(self.labels)
+        l2 = len(other.labels)
+        ldiff = l1 - l2
+        if ldiff < 0:
+            l = l1
+        else:
+            l = l2
+
+        order = 0
+        nlabels = 0
+        namereln = NameRelation.NONE
+        while l > 0:
+            l -= 1
+            l1 -= 1
+            l2 -= 1
+            label1 = self.labels[l1].lower()
+            label2 = other.labels[l2].lower()
+            if label1 < label2:
+                order = -1
+                if nlabels > 0:
+                    namereln = NameRelation.COMMONANCESTOR
+                return (namereln, order, nlabels)
+            elif label1 > label2:
+                order = 1
+                if nlabels > 0:
+                    namereln = NameRelation.COMMONANCESTOR
+                return (namereln, order, nlabels)
+            nlabels += 1
+        order = ldiff
+        if ldiff < 0:
+            namereln = NameRelation.SUPERDOMAIN
+        elif ldiff > 0:
+            namereln = NameRelation.SUBDOMAIN
+        else:
+            namereln = NameRelation.EQUAL
+        return (namereln, order, nlabels)
+
+    def is_subdomain(self, other: "Name") -> bool:
+        """Is self a subdomain of other?
+
+        Note that the notion of subdomain includes equality, e.g.
+        "dnspython.org" is a subdomain of itself.
+
+        Returns a ``bool``.
+        """
+
+        (nr, _, _) = self.fullcompare(other)
+        if nr == NameRelation.SUBDOMAIN or nr == NameRelation.EQUAL:
+            return True
+        return False
+
+    def is_superdomain(self, other: "Name") -> bool:
+        """Is self a superdomain of other?
+
+        Note that the notion of superdomain includes equality, e.g.
+        "dnspython.org" is a superdomain of itself.
+
+        Returns a ``bool``.
+        """
+
+        (nr, _, _) = self.fullcompare(other)
+        if nr == NameRelation.SUPERDOMAIN or nr == NameRelation.EQUAL:
+            return True
+        return False
+
+    def canonicalize(self) -> "Name":
+        """Return a name which is equal to the current name, but is in
+        DNSSEC canonical form.
+        """
+
+        return Name([x.lower() for x in self.labels])
+
+    def __eq__(self, other):
+        if isinstance(other, Name):
+            return self.fullcompare(other)[1] == 0
+        else:
+            return False
+
+    def __ne__(self, other):
+        if isinstance(other, Name):
+            return self.fullcompare(other)[1] != 0
+        else:
+            return True
+
+    def __lt__(self, other):
+        if isinstance(other, Name):
+            return self.fullcompare(other)[1] < 0
+        else:
+            return NotImplemented
+
+    def __le__(self, other):
+        if isinstance(other, Name):
+            return self.fullcompare(other)[1] <= 0
+        else:
+            return NotImplemented
+
+    def __ge__(self, other):
+        if isinstance(other, Name):
+            return self.fullcompare(other)[1] >= 0
+        else:
+            return NotImplemented
+
+    def __gt__(self, other):
+        if isinstance(other, Name):
+            return self.fullcompare(other)[1] > 0
+        else:
+            return NotImplemented
+
+    def __repr__(self):
+        return "<DNS name " + self.__str__() + ">"
+
+    def __str__(self):
+        return self.to_text(False)
+
+    def to_text(self, omit_final_dot: bool = False) -> str:
+        """Convert name to DNS text format.
+
+        *omit_final_dot* is a ``bool``.  If True, don't emit the final
+        dot (denoting the root label) for absolute names.  The default
+        is False.
+
+        Returns a ``str``.
+        """
+
+        if len(self.labels) == 0:
+            return "@"
+        if len(self.labels) == 1 and self.labels[0] == b"":
+            return "."
+        if omit_final_dot and self.is_absolute():
+            l = self.labels[:-1]
+        else:
+            l = self.labels
+        s = ".".join(map(_escapify, l))
+        return s
+
+    def to_unicode(
+        self, omit_final_dot: bool = False, idna_codec: Optional[IDNACodec] = None
+    ) -> str:
+        """Convert name to Unicode text format.
+
+        IDN ACE labels are converted to Unicode.
+
+        *omit_final_dot* is a ``bool``.  If True, don't emit the final
+        dot (denoting the root label) for absolute names.  The default
+        is False.
+        *idna_codec* specifies the IDNA encoder/decoder.  If None, the
+        dns.name.IDNA_2003_Practical encoder/decoder is used.
+        The IDNA_2003_Practical decoder does
+        not impose any policy, it just decodes punycode, so if you
+        don't want checking for compliance, you can use this decoder
+        for IDNA2008 as well.
+
+        Returns a ``str``.
+        """
+
+        if len(self.labels) == 0:
+            return "@"
+        if len(self.labels) == 1 and self.labels[0] == b"":
+            return "."
+        if omit_final_dot and self.is_absolute():
+            l = self.labels[:-1]
+        else:
+            l = self.labels
+        if idna_codec is None:
+            idna_codec = IDNA_2003_Practical
+        return ".".join([idna_codec.decode(x) for x in l])
+
+    def to_digestable(self, origin: Optional["Name"] = None) -> bytes:
+        """Convert name to a format suitable for digesting in hashes.
+
+        The name is canonicalized and converted to uncompressed wire
+        format.  All names in wire format are absolute.  If the name
+        is a relative name, then an origin must be supplied.
+
+        *origin* is a ``dns.name.Name`` or ``None``.  If the name is
+        relative and origin is not ``None``, then origin will be appended
+        to the name.
+
+        Raises ``dns.name.NeedAbsoluteNameOrOrigin`` if the name is
+        relative and no origin was provided.
+
+        Returns a ``bytes``.
+        """
+
+        digest = self.to_wire(origin=origin, canonicalize=True)
+        assert digest is not None
+        return digest
+
+    def to_wire(
+        self,
+        file: Optional[Any] = None,
+        compress: Optional[CompressType] = None,
+        origin: Optional["Name"] = None,
+        canonicalize: bool = False,
+    ) -> Optional[bytes]:
+        """Convert name to wire format, possibly compressing it.
+
+        *file* is the file where the name is emitted (typically an
+        io.BytesIO file).  If ``None`` (the default), a ``bytes``
+        containing the wire name will be returned.
+
+        *compress*, a ``dict``, is the compression table to use.  If
+        ``None`` (the default), names will not be compressed.  Note that
+        the compression code assumes that compression offset 0 is the
+        start of *file*, and thus compression will not be correct
+        if this is not the case.
+
+        *origin* is a ``dns.name.Name`` or ``None``.  If the name is
+        relative and origin is not ``None``, then *origin* will be appended
+        to it.
+
+        *canonicalize*, a ``bool``, indicates whether the name should
+        be canonicalized; that is, converted to a format suitable for
+        digesting in hashes.
+
+        Raises ``dns.name.NeedAbsoluteNameOrOrigin`` if the name is
+        relative and no origin was provided.
+
+        Returns a ``bytes`` or ``None``.
+        """
+
+        if file is None:
+            out = bytearray()
+            for label in self.labels:
+                out.append(len(label))
+                if canonicalize:
+                    out += label.lower()
+                else:
+                    out += label
+            if not self.is_absolute():
+                if origin is None or not origin.is_absolute():
+                    raise NeedAbsoluteNameOrOrigin
+                for label in origin.labels:
+                    out.append(len(label))
+                    if canonicalize:
+                        out += label.lower()
+                    else:
+                        out += label
+            return bytes(out)
+
+        labels: Iterable[bytes]
+        if not self.is_absolute():
+            if origin is None or not origin.is_absolute():
+                raise NeedAbsoluteNameOrOrigin
+            labels = list(self.labels)
+            labels.extend(list(origin.labels))
+        else:
+            labels = self.labels
+        i = 0
+        for label in labels:
+            n = Name(labels[i:])
+            i += 1
+            if compress is not None:
+                pos = compress.get(n)
+            else:
+                pos = None
+            if pos is not None:
+                value = 0xC000 + pos
+                s = struct.pack("!H", value)
+                file.write(s)
+                break
+            else:
+                if compress is not None and len(n) > 1:
+                    pos = file.tell()
+                    if pos <= 0x3FFF:
+                        compress[n] = pos
+                l = len(label)
+                file.write(struct.pack("!B", l))
+                if l > 0:
+                    if canonicalize:
+                        file.write(label.lower())
+                    else:
+                        file.write(label)
+        return None
+
+    def __len__(self) -> int:
+        """The length of the name (in labels).
+
+        Returns an ``int``.
+        """
+
+        return len(self.labels)
+
+    def __getitem__(self, index):
+        return self.labels[index]
+
+    def __add__(self, other):
+        return self.concatenate(other)
+
+    def __sub__(self, other):
+        return self.relativize(other)
+
+    def split(self, depth: int) -> Tuple["Name", "Name"]:
+        """Split a name into a prefix and suffix names at the specified depth.
+
+        *depth* is an ``int`` specifying the number of labels in the suffix
+
+        Raises ``ValueError`` if *depth* was not >= 0 and <= the length of the
+        name.
+
+        Returns the tuple ``(prefix, suffix)``.
+        """
+
+        l = len(self.labels)
+        if depth == 0:
+            return (self, dns.name.empty)
+        elif depth == l:
+            return (dns.name.empty, self)
+        elif depth < 0 or depth > l:
+            raise ValueError("depth must be >= 0 and <= the length of the name")
+        return (Name(self[:-depth]), Name(self[-depth:]))
+
+    def concatenate(self, other: "Name") -> "Name":
+        """Return a new name which is the concatenation of self and other.
+
+        Raises ``dns.name.AbsoluteConcatenation`` if the name is
+        absolute and *other* is not the empty name.
+
+        Returns a ``dns.name.Name``.
+        """
+
+        if self.is_absolute() and len(other) > 0:
+            raise AbsoluteConcatenation
+        labels = list(self.labels)
+        labels.extend(list(other.labels))
+        return Name(labels)
+
+    def relativize(self, origin: "Name") -> "Name":
+        """If the name is a subdomain of *origin*, return a new name which is
+        the name relative to origin.  Otherwise return the name.
+
+        For example, relativizing ``www.dnspython.org.`` to origin
+        ``dnspython.org.`` returns the name ``www``.  Relativizing ``example.``
+        to origin ``dnspython.org.`` returns ``example.``.
+
+        Returns a ``dns.name.Name``.
+        """
+
+        if origin is not None and self.is_subdomain(origin):
+            return Name(self[: -len(origin)])
+        else:
+            return self
+
+    def derelativize(self, origin: "Name") -> "Name":
+        """If the name is a relative name, return a new name which is the
+        concatenation of the name and origin.  Otherwise return the name.
+
+        For example, derelativizing ``www`` to origin ``dnspython.org.``
+        returns the name ``www.dnspython.org.``.  Derelativizing ``example.``
+        to origin ``dnspython.org.`` returns ``example.``.
+
+        Returns a ``dns.name.Name``.
+        """
+
+        if not self.is_absolute():
+            return self.concatenate(origin)
+        else:
+            return self
+
+    def choose_relativity(
+        self, origin: Optional["Name"] = None, relativize: bool = True
+    ) -> "Name":
+        """Return a name with the relativity desired by the caller.
+
+        If *origin* is ``None``, then the name is returned.
+        Otherwise, if *relativize* is ``True`` the name is
+        relativized, and if *relativize* is ``False`` the name is
+        derelativized.
+
+        Returns a ``dns.name.Name``.
+        """
+
+        if origin:
+            if relativize:
+                return self.relativize(origin)
+            else:
+                return self.derelativize(origin)
+        else:
+            return self
+
+    def parent(self) -> "Name":
+        """Return the parent of the name.
+
+        For example, the parent of ``www.dnspython.org.`` is ``dnspython.org``.
+
+        Raises ``dns.name.NoParent`` if the name is either the root name or the
+        empty name, and thus has no parent.
+
+        Returns a ``dns.name.Name``.
+        """
+
+        if self == root or self == empty:
+            raise NoParent
+        return Name(self.labels[1:])
+
+    def predecessor(self, origin: "Name", prefix_ok: bool = True) -> "Name":
+        """Return the maximal predecessor of *name* in the DNSSEC ordering in the zone
+        whose origin is *origin*, or return the longest name under *origin* if the
+        name is origin (i.e. wrap around to the longest name, which may still be
+        *origin* due to length considerations.
+
+        The relativity of the name is preserved, so if this name is relative
+        then the method will return a relative name, and likewise if this name
+        is absolute then the predecessor will be absolute.
+
+        *prefix_ok* indicates if prefixing labels is allowed, and
+        defaults to ``True``.  Normally it is good to allow this, but if computing
+        a maximal predecessor at a zone cut point then ``False`` must be specified.
+        """
+        return _handle_relativity_and_call(
+            _absolute_predecessor, self, origin, prefix_ok
+        )
+
+    def successor(self, origin: "Name", prefix_ok: bool = True) -> "Name":
+        """Return the minimal successor of *name* in the DNSSEC ordering in the zone
+        whose origin is *origin*, or return *origin* if the successor cannot be
+        computed due to name length limitations.
+
+        Note that *origin* is returned in the "too long" cases because wrapping
+        around to the origin is how NSEC records express "end of the zone".
+
+        The relativity of the name is preserved, so if this name is relative
+        then the method will return a relative name, and likewise if this name
+        is absolute then the successor will be absolute.
+
+        *prefix_ok* indicates if prefixing a new minimal label is allowed, and
+        defaults to ``True``.  Normally it is good to allow this, but if computing
+        a minimal successor at a zone cut point then ``False`` must be specified.
+        """
+        return _handle_relativity_and_call(_absolute_successor, self, origin, prefix_ok)
+
+
+#: The root name, '.'
+root = Name([b""])
+
+#: The empty name.
+empty = Name([])
+
+
+def from_unicode(
+    text: str, origin: Optional[Name] = root, idna_codec: Optional[IDNACodec] = None
+) -> Name:
+    """Convert unicode text into a Name object.
+
+    Labels are encoded in IDN ACE form according to rules specified by
+    the IDNA codec.
+
+    *text*, a ``str``, is the text to convert into a name.
+
+    *origin*, a ``dns.name.Name``, specifies the origin to
+    append to non-absolute names.  The default is the root name.
+
+    *idna_codec*, a ``dns.name.IDNACodec``, specifies the IDNA
+    encoder/decoder.  If ``None``, the default IDNA 2003 encoder/decoder
+    is used.
+
+    Returns a ``dns.name.Name``.
+    """
+
+    if not isinstance(text, str):
+        raise ValueError("input to from_unicode() must be a unicode string")
+    if not (origin is None or isinstance(origin, Name)):
+        raise ValueError("origin must be a Name or None")
+    labels = []
+    label = ""
+    escaping = False
+    edigits = 0
+    total = 0
+    if idna_codec is None:
+        idna_codec = IDNA_2003
+    if text == "@":
+        text = ""
+    if text:
+        if text in [".", "\u3002", "\uff0e", "\uff61"]:
+            return Name([b""])  # no Unicode "u" on this constant!
+        for c in text:
+            if escaping:
+                if edigits == 0:
+                    if c.isdigit():
+                        total = int(c)
+                        edigits += 1
+                    else:
+                        label += c
+                        escaping = False
+                else:
+                    if not c.isdigit():
+                        raise BadEscape
+                    total *= 10
+                    total += int(c)
+                    edigits += 1
+                    if edigits == 3:
+                        escaping = False
+                        label += chr(total)
+            elif c in [".", "\u3002", "\uff0e", "\uff61"]:
+                if len(label) == 0:
+                    raise EmptyLabel
+                labels.append(idna_codec.encode(label))
+                label = ""
+            elif c == "\\":
+                escaping = True
+                edigits = 0
+                total = 0
+            else:
+                label += c
+        if escaping:
+            raise BadEscape
+        if len(label) > 0:
+            labels.append(idna_codec.encode(label))
+        else:
+            labels.append(b"")
+
+    if (len(labels) == 0 or labels[-1] != b"") and origin is not None:
+        labels.extend(list(origin.labels))
+    return Name(labels)
+
+
+def is_all_ascii(text: str) -> bool:
+    for c in text:
+        if ord(c) > 0x7F:
+            return False
+    return True
+
+
+def from_text(
+    text: Union[bytes, str],
+    origin: Optional[Name] = root,
+    idna_codec: Optional[IDNACodec] = None,
+) -> Name:
+    """Convert text into a Name object.
+
+    *text*, a ``bytes`` or ``str``, is the text to convert into a name.
+
+    *origin*, a ``dns.name.Name``, specifies the origin to
+    append to non-absolute names.  The default is the root name.
+
+    *idna_codec*, a ``dns.name.IDNACodec``, specifies the IDNA
+    encoder/decoder.  If ``None``, the default IDNA 2003 encoder/decoder
+    is used.
+
+    Returns a ``dns.name.Name``.
+    """
+
+    if isinstance(text, str):
+        if not is_all_ascii(text):
+            # Some codepoint in the input text is > 127, so IDNA applies.
+            return from_unicode(text, origin, idna_codec)
+        # The input is all ASCII, so treat this like an ordinary non-IDNA
+        # domain name.  Note that "all ASCII" is about the input text,
+        # not the codepoints in the domain name.  E.g. if text has value
+        #
+        # r'\150\151\152\153\154\155\156\157\158\159'
+        #
+        # then it's still "all ASCII" even though the domain name has
+        # codepoints > 127.
+        text = text.encode("ascii")
+    if not isinstance(text, bytes):
+        raise ValueError("input to from_text() must be a string")
+    if not (origin is None or isinstance(origin, Name)):
+        raise ValueError("origin must be a Name or None")
+    labels = []
+    label = b""
+    escaping = False
+    edigits = 0
+    total = 0
+    if text == b"@":
+        text = b""
+    if text:
+        if text == b".":
+            return Name([b""])
+        for c in text:
+            byte_ = struct.pack("!B", c)
+            if escaping:
+                if edigits == 0:
+                    if byte_.isdigit():
+                        total = int(byte_)
+                        edigits += 1
+                    else:
+                        label += byte_
+                        escaping = False
+                else:
+                    if not byte_.isdigit():
+                        raise BadEscape
+                    total *= 10
+                    total += int(byte_)
+                    edigits += 1
+                    if edigits == 3:
+                        escaping = False
+                        label += struct.pack("!B", total)
+            elif byte_ == b".":
+                if len(label) == 0:
+                    raise EmptyLabel
+                labels.append(label)
+                label = b""
+            elif byte_ == b"\\":
+                escaping = True
+                edigits = 0
+                total = 0
+            else:
+                label += byte_
+        if escaping:
+            raise BadEscape
+        if len(label) > 0:
+            labels.append(label)
+        else:
+            labels.append(b"")
+    if (len(labels) == 0 or labels[-1] != b"") and origin is not None:
+        labels.extend(list(origin.labels))
+    return Name(labels)
+
+
+# we need 'dns.wire.Parser' quoted as dns.name and dns.wire depend on each other.
+
+
+def from_wire_parser(parser: "dns.wire.Parser") -> Name:
+    """Convert possibly compressed wire format into a Name.
+
+    *parser* is a dns.wire.Parser.
+
+    Raises ``dns.name.BadPointer`` if a compression pointer did not
+    point backwards in the message.
+
+    Raises ``dns.name.BadLabelType`` if an invalid label type was encountered.
+
+    Returns a ``dns.name.Name``
+    """
+
+    labels = []
+    biggest_pointer = parser.current
+    with parser.restore_furthest():
+        count = parser.get_uint8()
+        while count != 0:
+            if count < 64:
+                labels.append(parser.get_bytes(count))
+            elif count >= 192:
+                current = (count & 0x3F) * 256 + parser.get_uint8()
+                if current >= biggest_pointer:
+                    raise BadPointer
+                biggest_pointer = current
+                parser.seek(current)
+            else:
+                raise BadLabelType
+            count = parser.get_uint8()
+        labels.append(b"")
+    return Name(labels)
+
+
+def from_wire(message: bytes, current: int) -> Tuple[Name, int]:
+    """Convert possibly compressed wire format into a Name.
+
+    *message* is a ``bytes`` containing an entire DNS message in DNS
+    wire form.
+
+    *current*, an ``int``, is the offset of the beginning of the name
+    from the start of the message
+
+    Raises ``dns.name.BadPointer`` if a compression pointer did not
+    point backwards in the message.
+
+    Raises ``dns.name.BadLabelType`` if an invalid label type was encountered.
+
+    Returns a ``(dns.name.Name, int)`` tuple consisting of the name
+    that was read and the number of bytes of the wire format message
+    which were consumed reading it.
+    """
+
+    if not isinstance(message, bytes):
+        raise ValueError("input to from_wire() must be a byte string")
+    parser = dns.wire.Parser(message, current)
+    name = from_wire_parser(parser)
+    return (name, parser.current - current)
+
+
+# RFC 4471 Support
+
+_MINIMAL_OCTET = b"\x00"
+_MINIMAL_OCTET_VALUE = ord(_MINIMAL_OCTET)
+_SUCCESSOR_PREFIX = Name([_MINIMAL_OCTET])
+_MAXIMAL_OCTET = b"\xff"
+_MAXIMAL_OCTET_VALUE = ord(_MAXIMAL_OCTET)
+_AT_SIGN_VALUE = ord("@")
+_LEFT_SQUARE_BRACKET_VALUE = ord("[")
+
+
+def _wire_length(labels):
+    return functools.reduce(lambda v, x: v + len(x) + 1, labels, 0)
+
+
+def _pad_to_max_name(name):
+    needed = 255 - _wire_length(name.labels)
+    new_labels = []
+    while needed > 64:
+        new_labels.append(_MAXIMAL_OCTET * 63)
+        needed -= 64
+    if needed >= 2:
+        new_labels.append(_MAXIMAL_OCTET * (needed - 1))
+    # Note we're already maximal in the needed == 1 case as while we'd like
+    # to add one more byte as a new label, we can't, as adding a new non-empty
+    # label requires at least 2 bytes.
+    new_labels = list(reversed(new_labels))
+    new_labels.extend(name.labels)
+    return Name(new_labels)
+
+
+def _pad_to_max_label(label, suffix_labels):
+    length = len(label)
+    # We have to subtract one here to account for the length byte of label.
+    remaining = 255 - _wire_length(suffix_labels) - length - 1
+    if remaining <= 0:
+        # Shouldn't happen!
+        return label
+    needed = min(63 - length, remaining)
+    return label + _MAXIMAL_OCTET * needed
+
+
+def _absolute_predecessor(name: Name, origin: Name, prefix_ok: bool) -> Name:
+    # This is the RFC 4471 predecessor algorithm using the "absolute method" of section
+    # 3.1.1.
+    #
+    # Our caller must ensure that the name and origin are absolute, and that name is a
+    # subdomain of origin.
+    if name == origin:
+        return _pad_to_max_name(name)
+    least_significant_label = name[0]
+    if least_significant_label == _MINIMAL_OCTET:
+        return name.parent()
+    least_octet = least_significant_label[-1]
+    suffix_labels = name.labels[1:]
+    if least_octet == _MINIMAL_OCTET_VALUE:
+        new_labels = [least_significant_label[:-1]]
+    else:
+        octets = bytearray(least_significant_label)
+        octet = octets[-1]
+        if octet == _LEFT_SQUARE_BRACKET_VALUE:
+            octet = _AT_SIGN_VALUE
+        else:
+            octet -= 1
+        octets[-1] = octet
+        least_significant_label = bytes(octets)
+        new_labels = [_pad_to_max_label(least_significant_label, suffix_labels)]
+    new_labels.extend(suffix_labels)
+    name = Name(new_labels)
+    if prefix_ok:
+        return _pad_to_max_name(name)
+    else:
+        return name
+
+
+def _absolute_successor(name: Name, origin: Name, prefix_ok: bool) -> Name:
+    # This is the RFC 4471 successor algorithm using the "absolute method" of section
+    # 3.1.2.
+    #
+    # Our caller must ensure that the name and origin are absolute, and that name is a
+    # subdomain of origin.
+    if prefix_ok:
+        # Try prefixing \000 as new label
+        try:
+            return _SUCCESSOR_PREFIX.concatenate(name)
+        except NameTooLong:
+            pass
+    while name != origin:
+        # Try extending the least significant label.
+        least_significant_label = name[0]
+        if len(least_significant_label) < 63:
+            # We may be able to extend the least label with a minimal additional byte.
+            # This is only "may" because we could have a maximal length name even though
+            # the least significant label isn't maximally long.
+            new_labels = [least_significant_label + _MINIMAL_OCTET]
+            new_labels.extend(name.labels[1:])
+            try:
+                return dns.name.Name(new_labels)
+            except dns.name.NameTooLong:
+                pass
+        # We can't extend the label either, so we'll try to increment the least
+        # signficant non-maximal byte in it.
+        octets = bytearray(least_significant_label)
+        # We do this reversed iteration with an explicit indexing variable because
+        # if we find something to increment, we're going to want to truncate everything
+        # to the right of it.
+        for i in range(len(octets) - 1, -1, -1):
+            octet = octets[i]
+            if octet == _MAXIMAL_OCTET_VALUE:
+                # We can't increment this, so keep looking.
+                continue
+            # Finally, something we can increment.  We have to apply a special rule for
+            # incrementing "@", sending it to "[", because RFC 4034 6.1 says that when
+            # comparing names, uppercase letters compare as if they were their
+            # lower-case equivalents. If we increment "@" to "A", then it would compare
+            # as "a", which is after "[", "\", "]", "^", "_", and "`", so we would have
+            # skipped the most minimal successor, namely "[".
+            if octet == _AT_SIGN_VALUE:
+                octet = _LEFT_SQUARE_BRACKET_VALUE
+            else:
+                octet += 1
+            octets[i] = octet
+            # We can now truncate all of the maximal values we skipped (if any)
+            new_labels = [bytes(octets[: i + 1])]
+            new_labels.extend(name.labels[1:])
+            # We haven't changed the length of the name, so the Name constructor will
+            # always work.
+            return Name(new_labels)
+        # We couldn't increment, so chop off the least significant label and try
+        # again.
+        name = name.parent()
+
+    # We couldn't increment at all, so return the origin, as wrapping around is the
+    # DNSSEC way.
+    return origin
+
+
+def _handle_relativity_and_call(
+    function: Callable[[Name, Name, bool], Name],
+    name: Name,
+    origin: Name,
+    prefix_ok: bool,
+) -> Name:
+    # Make "name" absolute if needed, ensure that the origin is absolute,
+    # call function(), and then relativize the result if needed.
+    if not origin.is_absolute():
+        raise NeedAbsoluteNameOrOrigin
+    relative = not name.is_absolute()
+    if relative:
+        name = name.derelativize(origin)
+    elif not name.is_subdomain(origin):
+        raise NeedSubdomainOfOrigin
+    result_name = function(name, origin, prefix_ok)
+    if relative:
+        result_name = result_name.relativize(origin)
+    return result_name

vllm/lib/python3.10/site-packages/dns/tokenizer.py

@@ -0,0 +1,708 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+# Copyright (C) 2003-2017 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""Tokenize DNS zone file format"""
+
+import io
+import sys
+from typing import Any, List, Optional, Tuple
+
+import dns.exception
+import dns.name
+import dns.ttl
+
+_DELIMITERS = {" ", "\t", "\n", ";", "(", ")", '"'}
+_QUOTING_DELIMITERS = {'"'}
+
+EOF = 0
+EOL = 1
+WHITESPACE = 2
+IDENTIFIER = 3
+QUOTED_STRING = 4
+COMMENT = 5
+DELIMITER = 6
+
+
+class UngetBufferFull(dns.exception.DNSException):
+    """An attempt was made to unget a token when the unget buffer was full."""
+
+
+class Token:
+    """A DNS zone file format token.
+
+    ttype: The token type
+    value: The token value
+    has_escape: Does the token value contain escapes?
+    """
+
+    def __init__(
+        self,
+        ttype: int,
+        value: Any = "",
+        has_escape: bool = False,
+        comment: Optional[str] = None,
+    ):
+        """Initialize a token instance."""
+
+        self.ttype = ttype
+        self.value = value
+        self.has_escape = has_escape
+        self.comment = comment
+
+    def is_eof(self) -> bool:
+        return self.ttype == EOF
+
+    def is_eol(self) -> bool:
+        return self.ttype == EOL
+
+    def is_whitespace(self) -> bool:
+        return self.ttype == WHITESPACE
+
+    def is_identifier(self) -> bool:
+        return self.ttype == IDENTIFIER
+
+    def is_quoted_string(self) -> bool:
+        return self.ttype == QUOTED_STRING
+
+    def is_comment(self) -> bool:
+        return self.ttype == COMMENT
+
+    def is_delimiter(self) -> bool:  # pragma: no cover (we don't return delimiters yet)
+        return self.ttype == DELIMITER
+
+    def is_eol_or_eof(self) -> bool:
+        return self.ttype == EOL or self.ttype == EOF
+
+    def __eq__(self, other):
+        if not isinstance(other, Token):
+            return False
+        return self.ttype == other.ttype and self.value == other.value
+
+    def __ne__(self, other):
+        if not isinstance(other, Token):
+            return True
+        return self.ttype != other.ttype or self.value != other.value
+
+    def __str__(self):
+        return '%d "%s"' % (self.ttype, self.value)
+
+    def unescape(self) -> "Token":
+        if not self.has_escape:
+            return self
+        unescaped = ""
+        l = len(self.value)
+        i = 0
+        while i < l:
+            c = self.value[i]
+            i += 1
+            if c == "\\":
+                if i >= l:  # pragma: no cover   (can't happen via get())
+                    raise dns.exception.UnexpectedEnd
+                c = self.value[i]
+                i += 1
+                if c.isdigit():
+                    if i >= l:
+                        raise dns.exception.UnexpectedEnd
+                    c2 = self.value[i]
+                    i += 1
+                    if i >= l:
+                        raise dns.exception.UnexpectedEnd
+                    c3 = self.value[i]
+                    i += 1
+                    if not (c2.isdigit() and c3.isdigit()):
+                        raise dns.exception.SyntaxError
+                    codepoint = int(c) * 100 + int(c2) * 10 + int(c3)
+                    if codepoint > 255:
+                        raise dns.exception.SyntaxError
+                    c = chr(codepoint)
+            unescaped += c
+        return Token(self.ttype, unescaped)
+
+    def unescape_to_bytes(self) -> "Token":
+        # We used to use unescape() for TXT-like records, but this
+        # caused problems as we'd process DNS escapes into Unicode code
+        # points instead of byte values, and then a to_text() of the
+        # processed data would not equal the original input.  For
+        # example, \226 in the TXT record would have a to_text() of
+        # \195\162 because we applied UTF-8 encoding to Unicode code
+        # point 226.
+        #
+        # We now apply escapes while converting directly to bytes,
+        # avoiding this double encoding.
+        #
+        # This code also handles cases where the unicode input has
+        # non-ASCII code-points in it by converting it to UTF-8.  TXT
+        # records aren't defined for Unicode, but this is the best we
+        # can do to preserve meaning.  For example,
+        #
+        #     foo\u200bbar
+        #
+        # (where \u200b is Unicode code point 0x200b) will be treated
+        # as if the input had been the UTF-8 encoding of that string,
+        # namely:
+        #
+        #     foo\226\128\139bar
+        #
+        unescaped = b""
+        l = len(self.value)
+        i = 0
+        while i < l:
+            c = self.value[i]
+            i += 1
+            if c == "\\":
+                if i >= l:  # pragma: no cover   (can't happen via get())
+                    raise dns.exception.UnexpectedEnd
+                c = self.value[i]
+                i += 1
+                if c.isdigit():
+                    if i >= l:
+                        raise dns.exception.UnexpectedEnd
+                    c2 = self.value[i]
+                    i += 1
+                    if i >= l:
+                        raise dns.exception.UnexpectedEnd
+                    c3 = self.value[i]
+                    i += 1
+                    if not (c2.isdigit() and c3.isdigit()):
+                        raise dns.exception.SyntaxError
+                    codepoint = int(c) * 100 + int(c2) * 10 + int(c3)
+                    if codepoint > 255:
+                        raise dns.exception.SyntaxError
+                    unescaped += b"%c" % (codepoint)
+                else:
+                    # Note that as mentioned above, if c is a Unicode
+                    # code point outside of the ASCII range, then this
+                    # += is converting that code point to its UTF-8
+                    # encoding and appending multiple bytes to
+                    # unescaped.
+                    unescaped += c.encode()
+            else:
+                unescaped += c.encode()
+        return Token(self.ttype, bytes(unescaped))
+
+
+class Tokenizer:
+    """A DNS zone file format tokenizer.
+
+    A token object is basically a (type, value) tuple.  The valid
+    types are EOF, EOL, WHITESPACE, IDENTIFIER, QUOTED_STRING,
+    COMMENT, and DELIMITER.
+
+    file: The file to tokenize
+
+    ungotten_char: The most recently ungotten character, or None.
+
+    ungotten_token: The most recently ungotten token, or None.
+
+    multiline: The current multiline level.  This value is increased
+    by one every time a '(' delimiter is read, and decreased by one every time
+    a ')' delimiter is read.
+
+    quoting: This variable is true if the tokenizer is currently
+    reading a quoted string.
+
+    eof: This variable is true if the tokenizer has encountered EOF.
+
+    delimiters: The current delimiter dictionary.
+
+    line_number: The current line number
+
+    filename: A filename that will be returned by the where() method.
+
+    idna_codec: A dns.name.IDNACodec, specifies the IDNA
+    encoder/decoder.  If None, the default IDNA 2003
+    encoder/decoder is used.
+    """
+
+    def __init__(
+        self,
+        f: Any = sys.stdin,
+        filename: Optional[str] = None,
+        idna_codec: Optional[dns.name.IDNACodec] = None,
+    ):
+        """Initialize a tokenizer instance.
+
+        f: The file to tokenize.  The default is sys.stdin.
+        This parameter may also be a string, in which case the tokenizer
+        will take its input from the contents of the string.
+
+        filename: the name of the filename that the where() method
+        will return.
+
+        idna_codec: A dns.name.IDNACodec, specifies the IDNA
+        encoder/decoder.  If None, the default IDNA 2003
+        encoder/decoder is used.
+        """
+
+        if isinstance(f, str):
+            f = io.StringIO(f)
+            if filename is None:
+                filename = "<string>"
+        elif isinstance(f, bytes):
+            f = io.StringIO(f.decode())
+            if filename is None:
+                filename = "<string>"
+        else:
+            if filename is None:
+                if f is sys.stdin:
+                    filename = "<stdin>"
+                else:
+                    filename = "<file>"
+        self.file = f
+        self.ungotten_char: Optional[str] = None
+        self.ungotten_token: Optional[Token] = None
+        self.multiline = 0
+        self.quoting = False
+        self.eof = False
+        self.delimiters = _DELIMITERS
+        self.line_number = 1
+        assert filename is not None
+        self.filename = filename
+        if idna_codec is None:
+            self.idna_codec: dns.name.IDNACodec = dns.name.IDNA_2003
+        else:
+            self.idna_codec = idna_codec
+
+    def _get_char(self) -> str:
+        """Read a character from input."""
+
+        if self.ungotten_char is None:
+            if self.eof:
+                c = ""
+            else:
+                c = self.file.read(1)
+                if c == "":
+                    self.eof = True
+                elif c == "\n":
+                    self.line_number += 1
+        else:
+            c = self.ungotten_char
+            self.ungotten_char = None
+        return c
+
+    def where(self) -> Tuple[str, int]:
+        """Return the current location in the input.
+
+        Returns a (string, int) tuple.  The first item is the filename of
+        the input, the second is the current line number.
+        """
+
+        return (self.filename, self.line_number)
+
+    def _unget_char(self, c: str) -> None:
+        """Unget a character.
+
+        The unget buffer for characters is only one character large; it is
+        an error to try to unget a character when the unget buffer is not
+        empty.
+
+        c: the character to unget
+        raises UngetBufferFull: there is already an ungotten char
+        """
+
+        if self.ungotten_char is not None:
+            # this should never happen!
+            raise UngetBufferFull  # pragma: no cover
+        self.ungotten_char = c
+
+    def skip_whitespace(self) -> int:
+        """Consume input until a non-whitespace character is encountered.
+
+        The non-whitespace character is then ungotten, and the number of
+        whitespace characters consumed is returned.
+
+        If the tokenizer is in multiline mode, then newlines are whitespace.
+
+        Returns the number of characters skipped.
+        """
+
+        skipped = 0
+        while True:
+            c = self._get_char()
+            if c != " " and c != "\t":
+                if (c != "\n") or not self.multiline:
+                    self._unget_char(c)
+                    return skipped
+            skipped += 1
+
+    def get(self, want_leading: bool = False, want_comment: bool = False) -> Token:
+        """Get the next token.
+
+        want_leading: If True, return a WHITESPACE token if the
+        first character read is whitespace.  The default is False.
+
+        want_comment: If True, return a COMMENT token if the
+        first token read is a comment.  The default is False.
+
+        Raises dns.exception.UnexpectedEnd: input ended prematurely
+
+        Raises dns.exception.SyntaxError: input was badly formed
+
+        Returns a Token.
+        """
+
+        if self.ungotten_token is not None:
+            utoken = self.ungotten_token
+            self.ungotten_token = None
+            if utoken.is_whitespace():
+                if want_leading:
+                    return utoken
+            elif utoken.is_comment():
+                if want_comment:
+                    return utoken
+            else:
+                return utoken
+        skipped = self.skip_whitespace()
+        if want_leading and skipped > 0:
+            return Token(WHITESPACE, " ")
+        token = ""
+        ttype = IDENTIFIER
+        has_escape = False
+        while True:
+            c = self._get_char()
+            if c == "" or c in self.delimiters:
+                if c == "" and self.quoting:
+                    raise dns.exception.UnexpectedEnd
+                if token == "" and ttype != QUOTED_STRING:
+                    if c == "(":
+                        self.multiline += 1
+                        self.skip_whitespace()
+                        continue
+                    elif c == ")":
+                        if self.multiline <= 0:
+                            raise dns.exception.SyntaxError
+                        self.multiline -= 1
+                        self.skip_whitespace()
+                        continue
+                    elif c == '"':
+                        if not self.quoting:
+                            self.quoting = True
+                            self.delimiters = _QUOTING_DELIMITERS
+                            ttype = QUOTED_STRING
+                            continue
+                        else:
+                            self.quoting = False
+                            self.delimiters = _DELIMITERS
+                            self.skip_whitespace()
+                            continue
+                    elif c == "\n":
+                        return Token(EOL, "\n")
+                    elif c == ";":
+                        while 1:
+                            c = self._get_char()
+                            if c == "\n" or c == "":
+                                break
+                            token += c
+                        if want_comment:
+                            self._unget_char(c)
+                            return Token(COMMENT, token)
+                        elif c == "":
+                            if self.multiline:
+                                raise dns.exception.SyntaxError(
+                                    "unbalanced parentheses"
+                                )
+                            return Token(EOF, comment=token)
+                        elif self.multiline:
+                            self.skip_whitespace()
+                            token = ""
+                            continue
+                        else:
+                            return Token(EOL, "\n", comment=token)
+                    else:
+                        # This code exists in case we ever want a
+                        # delimiter to be returned.  It never produces
+                        # a token currently.
+                        token = c
+                        ttype = DELIMITER
+                else:
+                    self._unget_char(c)
+                break
+            elif self.quoting and c == "\n":
+                raise dns.exception.SyntaxError("newline in quoted string")
+            elif c == "\\":
+                #
+                # It's an escape.  Put it and the next character into
+                # the token; it will be checked later for goodness.
+                #
+                token += c
+                has_escape = True
+                c = self._get_char()
+                if c == "" or (c == "\n" and not self.quoting):
+                    raise dns.exception.UnexpectedEnd
+            token += c
+        if token == "" and ttype != QUOTED_STRING:
+            if self.multiline:
+                raise dns.exception.SyntaxError("unbalanced parentheses")
+            ttype = EOF
+        return Token(ttype, token, has_escape)
+
+    def unget(self, token: Token) -> None:
+        """Unget a token.
+
+        The unget buffer for tokens is only one token large; it is
+        an error to try to unget a token when the unget buffer is not
+        empty.
+
+        token: the token to unget
+
+        Raises UngetBufferFull: there is already an ungotten token
+        """
+
+        if self.ungotten_token is not None:
+            raise UngetBufferFull
+        self.ungotten_token = token
+
+    def next(self):
+        """Return the next item in an iteration.
+
+        Returns a Token.
+        """
+
+        token = self.get()
+        if token.is_eof():
+            raise StopIteration
+        return token
+
+    __next__ = next
+
+    def __iter__(self):
+        return self
+
+    # Helpers
+
+    def get_int(self, base: int = 10) -> int:
+        """Read the next token and interpret it as an unsigned integer.
+
+        Raises dns.exception.SyntaxError if not an unsigned integer.
+
+        Returns an int.
+        """
+
+        token = self.get().unescape()
+        if not token.is_identifier():
+            raise dns.exception.SyntaxError("expecting an identifier")
+        if not token.value.isdigit():
+            raise dns.exception.SyntaxError("expecting an integer")
+        return int(token.value, base)
+
+    def get_uint8(self) -> int:
+        """Read the next token and interpret it as an 8-bit unsigned
+        integer.
+
+        Raises dns.exception.SyntaxError if not an 8-bit unsigned integer.
+
+        Returns an int.
+        """
+
+        value = self.get_int()
+        if value < 0 or value > 255:
+            raise dns.exception.SyntaxError(
+                "%d is not an unsigned 8-bit integer" % value
+            )
+        return value
+
+    def get_uint16(self, base: int = 10) -> int:
+        """Read the next token and interpret it as a 16-bit unsigned
+        integer.
+
+        Raises dns.exception.SyntaxError if not a 16-bit unsigned integer.
+
+        Returns an int.
+        """
+
+        value = self.get_int(base=base)
+        if value < 0 or value > 65535:
+            if base == 8:
+                raise dns.exception.SyntaxError(
+                    f"{value:o} is not an octal unsigned 16-bit integer"
+                )
+            else:
+                raise dns.exception.SyntaxError(
+                    "%d is not an unsigned 16-bit integer" % value
+                )
+        return value
+
+    def get_uint32(self, base: int = 10) -> int:
+        """Read the next token and interpret it as a 32-bit unsigned
+        integer.
+
+        Raises dns.exception.SyntaxError if not a 32-bit unsigned integer.
+
+        Returns an int.
+        """
+
+        value = self.get_int(base=base)
+        if value < 0 or value > 4294967295:
+            raise dns.exception.SyntaxError(
+                "%d is not an unsigned 32-bit integer" % value
+            )
+        return value
+
+    def get_uint48(self, base: int = 10) -> int:
+        """Read the next token and interpret it as a 48-bit unsigned
+        integer.
+
+        Raises dns.exception.SyntaxError if not a 48-bit unsigned integer.
+
+        Returns an int.
+        """
+
+        value = self.get_int(base=base)
+        if value < 0 or value > 281474976710655:
+            raise dns.exception.SyntaxError(
+                "%d is not an unsigned 48-bit integer" % value
+            )
+        return value
+
+    def get_string(self, max_length: Optional[int] = None) -> str:
+        """Read the next token and interpret it as a string.
+
+        Raises dns.exception.SyntaxError if not a string.
+        Raises dns.exception.SyntaxError if token value length
+        exceeds max_length (if specified).
+
+        Returns a string.
+        """
+
+        token = self.get().unescape()
+        if not (token.is_identifier() or token.is_quoted_string()):
+            raise dns.exception.SyntaxError("expecting a string")
+        if max_length and len(token.value) > max_length:
+            raise dns.exception.SyntaxError("string too long")
+        return token.value
+
+    def get_identifier(self) -> str:
+        """Read the next token, which should be an identifier.
+
+        Raises dns.exception.SyntaxError if not an identifier.
+
+        Returns a string.
+        """
+
+        token = self.get().unescape()
+        if not token.is_identifier():
+            raise dns.exception.SyntaxError("expecting an identifier")
+        return token.value
+
+    def get_remaining(self, max_tokens: Optional[int] = None) -> List[Token]:
+        """Return the remaining tokens on the line, until an EOL or EOF is seen.
+
+        max_tokens: If not None, stop after this number of tokens.
+
+        Returns a list of tokens.
+        """
+
+        tokens = []
+        while True:
+            token = self.get()
+            if token.is_eol_or_eof():
+                self.unget(token)
+                break
+            tokens.append(token)
+            if len(tokens) == max_tokens:
+                break
+        return tokens
+
+    def concatenate_remaining_identifiers(self, allow_empty: bool = False) -> str:
+        """Read the remaining tokens on the line, which should be identifiers.
+
+        Raises dns.exception.SyntaxError if there are no remaining tokens,
+        unless `allow_empty=True` is given.
+
+        Raises dns.exception.SyntaxError if a token is seen that is not an
+        identifier.
+
+        Returns a string containing a concatenation of the remaining
+        identifiers.
+        """
+        s = ""
+        while True:
+            token = self.get().unescape()
+            if token.is_eol_or_eof():
+                self.unget(token)
+                break
+            if not token.is_identifier():
+                raise dns.exception.SyntaxError
+            s += token.value
+        if not (allow_empty or s):
+            raise dns.exception.SyntaxError("expecting another identifier")
+        return s
+
+    def as_name(
+        self,
+        token: Token,
+        origin: Optional[dns.name.Name] = None,
+        relativize: bool = False,
+        relativize_to: Optional[dns.name.Name] = None,
+    ) -> dns.name.Name:
+        """Try to interpret the token as a DNS name.
+
+        Raises dns.exception.SyntaxError if not a name.
+
+        Returns a dns.name.Name.
+        """
+        if not token.is_identifier():
+            raise dns.exception.SyntaxError("expecting an identifier")
+        name = dns.name.from_text(token.value, origin, self.idna_codec)
+        return name.choose_relativity(relativize_to or origin, relativize)
+
+    def get_name(
+        self,
+        origin: Optional[dns.name.Name] = None,
+        relativize: bool = False,
+        relativize_to: Optional[dns.name.Name] = None,
+    ) -> dns.name.Name:
+        """Read the next token and interpret it as a DNS name.
+
+        Raises dns.exception.SyntaxError if not a name.
+
+        Returns a dns.name.Name.
+        """
+
+        token = self.get()
+        return self.as_name(token, origin, relativize, relativize_to)
+
+    def get_eol_as_token(self) -> Token:
+        """Read the next token and raise an exception if it isn't EOL or
+        EOF.
+
+        Returns a string.
+        """
+
+        token = self.get()
+        if not token.is_eol_or_eof():
+            raise dns.exception.SyntaxError(
+                'expected EOL or EOF, got %d "%s"' % (token.ttype, token.value)
+            )
+        return token
+
+    def get_eol(self) -> str:
+        return self.get_eol_as_token().value
+
+    def get_ttl(self) -> int:
+        """Read the next token and interpret it as a DNS TTL.
+
+        Raises dns.exception.SyntaxError or dns.ttl.BadTTL if not an
+        identifier or badly formed.
+
+        Returns an int.
+        """
+
+        token = self.get().unescape()
+        if not token.is_identifier():
+            raise dns.exception.SyntaxError("expecting an identifier")
+        return dns.ttl.from_text(token.value)

vllm/lib/python3.10/site-packages/dns/ttl.py

@@ -0,0 +1,92 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+# Copyright (C) 2003-2017 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""DNS TTL conversion."""
+
+from typing import Union
+
+import dns.exception
+
+# Technically TTLs are supposed to be between 0 and 2**31 - 1, with values
+# greater than that interpreted as 0, but we do not impose this policy here
+# as values > 2**31 - 1 occur in real world data.
+#
+# We leave it to applications to impose tighter bounds if desired.
+MAX_TTL = 2**32 - 1
+
+
+class BadTTL(dns.exception.SyntaxError):
+    """DNS TTL value is not well-formed."""
+
+
+def from_text(text: str) -> int:
+    """Convert the text form of a TTL to an integer.
+
+    The BIND 8 units syntax for TTLs (e.g. '1w6d4h3m10s') is supported.
+
+    *text*, a ``str``, the textual TTL.
+
+    Raises ``dns.ttl.BadTTL`` if the TTL is not well-formed.
+
+    Returns an ``int``.
+    """
+
+    if text.isdigit():
+        total = int(text)
+    elif len(text) == 0:
+        raise BadTTL
+    else:
+        total = 0
+        current = 0
+        need_digit = True
+        for c in text:
+            if c.isdigit():
+                current *= 10
+                current += int(c)
+                need_digit = False
+            else:
+                if need_digit:
+                    raise BadTTL
+                c = c.lower()
+                if c == "w":
+                    total += current * 604800
+                elif c == "d":
+                    total += current * 86400
+                elif c == "h":
+                    total += current * 3600
+                elif c == "m":
+                    total += current * 60
+                elif c == "s":
+                    total += current
+                else:
+                    raise BadTTL(f"unknown unit '{c}'")
+                current = 0
+                need_digit = True
+        if not current == 0:
+            raise BadTTL("trailing integer")
+    if total < 0 or total > MAX_TTL:
+        raise BadTTL("TTL should be between 0 and 2**32 - 1 (inclusive)")
+    return total
+
+
+def make(value: Union[int, str]) -> int:
+    if isinstance(value, int):
+        return value
+    elif isinstance(value, str):
+        return dns.ttl.from_text(value)
+    else:
+        raise ValueError("cannot convert value to TTL")

vllm/lib/python3.10/site-packages/httpcore/_async/__init__.py

@@ -0,0 +1,39 @@
+from .connection import AsyncHTTPConnection
+from .connection_pool import AsyncConnectionPool
+from .http11 import AsyncHTTP11Connection
+from .http_proxy import AsyncHTTPProxy
+from .interfaces import AsyncConnectionInterface
+
+try:
+    from .http2 import AsyncHTTP2Connection
+except ImportError:  # pragma: nocover
+
+    class AsyncHTTP2Connection:  # type: ignore
+        def __init__(self, *args, **kwargs) -> None:  # type: ignore
+            raise RuntimeError(
+                "Attempted to use http2 support, but the `h2` package is not "
+                "installed. Use 'pip install httpcore[http2]'."
+            )
+
+
+try:
+    from .socks_proxy import AsyncSOCKSProxy
+except ImportError:  # pragma: nocover
+
+    class AsyncSOCKSProxy:  # type: ignore
+        def __init__(self, *args, **kwargs) -> None:  # type: ignore
+            raise RuntimeError(
+                "Attempted to use SOCKS support, but the `socksio` package is not "
+                "installed. Use 'pip install httpcore[socks]'."
+            )
+
+
+__all__ = [
+    "AsyncHTTPConnection",
+    "AsyncConnectionPool",
+    "AsyncHTTPProxy",
+    "AsyncHTTP11Connection",
+    "AsyncHTTP2Connection",
+    "AsyncConnectionInterface",
+    "AsyncSOCKSProxy",
+]

vllm/lib/python3.10/site-packages/httpcore/_async/connection.py

@@ -0,0 +1,222 @@
+from __future__ import annotations
+
+import itertools
+import logging
+import ssl
+import types
+import typing
+
+from .._backends.auto import AutoBackend
+from .._backends.base import SOCKET_OPTION, AsyncNetworkBackend, AsyncNetworkStream
+from .._exceptions import ConnectError, ConnectTimeout
+from .._models import Origin, Request, Response
+from .._ssl import default_ssl_context
+from .._synchronization import AsyncLock
+from .._trace import Trace
+from .http11 import AsyncHTTP11Connection
+from .interfaces import AsyncConnectionInterface
+
+RETRIES_BACKOFF_FACTOR = 0.5  # 0s, 0.5s, 1s, 2s, 4s, etc.
+
+
+logger = logging.getLogger("httpcore.connection")
+
+
+def exponential_backoff(factor: float) -> typing.Iterator[float]:
+    """
+    Generate a geometric sequence that has a ratio of 2 and starts with 0.
+
+    For example:
+    - `factor = 2`: `0, 2, 4, 8, 16, 32, 64, ...`
+    - `factor = 3`: `0, 3, 6, 12, 24, 48, 96, ...`
+    """
+    yield 0
+    for n in itertools.count():
+        yield factor * 2**n
+
+
+class AsyncHTTPConnection(AsyncConnectionInterface):
+    def __init__(
+        self,
+        origin: Origin,
+        ssl_context: ssl.SSLContext | None = None,
+        keepalive_expiry: float | None = None,
+        http1: bool = True,
+        http2: bool = False,
+        retries: int = 0,
+        local_address: str | None = None,
+        uds: str | None = None,
+        network_backend: AsyncNetworkBackend | None = None,
+        socket_options: typing.Iterable[SOCKET_OPTION] | None = None,
+    ) -> None:
+        self._origin = origin
+        self._ssl_context = ssl_context
+        self._keepalive_expiry = keepalive_expiry
+        self._http1 = http1
+        self._http2 = http2
+        self._retries = retries
+        self._local_address = local_address
+        self._uds = uds
+
+        self._network_backend: AsyncNetworkBackend = (
+            AutoBackend() if network_backend is None else network_backend
+        )
+        self._connection: AsyncConnectionInterface | None = None
+        self._connect_failed: bool = False
+        self._request_lock = AsyncLock()
+        self._socket_options = socket_options
+
+    async def handle_async_request(self, request: Request) -> Response:
+        if not self.can_handle_request(request.url.origin):
+            raise RuntimeError(
+                f"Attempted to send request to {request.url.origin} on connection to {self._origin}"
+            )
+
+        try:
+            async with self._request_lock:
+                if self._connection is None:
+                    stream = await self._connect(request)
+
+                    ssl_object = stream.get_extra_info("ssl_object")
+                    http2_negotiated = (
+                        ssl_object is not None
+                        and ssl_object.selected_alpn_protocol() == "h2"
+                    )
+                    if http2_negotiated or (self._http2 and not self._http1):
+                        from .http2 import AsyncHTTP2Connection
+
+                        self._connection = AsyncHTTP2Connection(
+                            origin=self._origin,
+                            stream=stream,
+                            keepalive_expiry=self._keepalive_expiry,
+                        )
+                    else:
+                        self._connection = AsyncHTTP11Connection(
+                            origin=self._origin,
+                            stream=stream,
+                            keepalive_expiry=self._keepalive_expiry,
+                        )
+        except BaseException as exc:
+            self._connect_failed = True
+            raise exc
+
+        return await self._connection.handle_async_request(request)
+
+    async def _connect(self, request: Request) -> AsyncNetworkStream:
+        timeouts = request.extensions.get("timeout", {})
+        sni_hostname = request.extensions.get("sni_hostname", None)
+        timeout = timeouts.get("connect", None)
+
+        retries_left = self._retries
+        delays = exponential_backoff(factor=RETRIES_BACKOFF_FACTOR)
+
+        while True:
+            try:
+                if self._uds is None:
+                    kwargs = {
+                        "host": self._origin.host.decode("ascii"),
+                        "port": self._origin.port,
+                        "local_address": self._local_address,
+                        "timeout": timeout,
+                        "socket_options": self._socket_options,
+                    }
+                    async with Trace("connect_tcp", logger, request, kwargs) as trace:
+                        stream = await self._network_backend.connect_tcp(**kwargs)
+                        trace.return_value = stream
+                else:
+                    kwargs = {
+                        "path": self._uds,
+                        "timeout": timeout,
+                        "socket_options": self._socket_options,
+                    }
+                    async with Trace(
+                        "connect_unix_socket", logger, request, kwargs
+                    ) as trace:
+                        stream = await self._network_backend.connect_unix_socket(
+                            **kwargs
+                        )
+                        trace.return_value = stream
+
+                if self._origin.scheme in (b"https", b"wss"):
+                    ssl_context = (
+                        default_ssl_context()
+                        if self._ssl_context is None
+                        else self._ssl_context
+                    )
+                    alpn_protocols = ["http/1.1", "h2"] if self._http2 else ["http/1.1"]
+                    ssl_context.set_alpn_protocols(alpn_protocols)
+
+                    kwargs = {
+                        "ssl_context": ssl_context,
+                        "server_hostname": sni_hostname
+                        or self._origin.host.decode("ascii"),
+                        "timeout": timeout,
+                    }
+                    async with Trace("start_tls", logger, request, kwargs) as trace:
+                        stream = await stream.start_tls(**kwargs)
+                        trace.return_value = stream
+                return stream
+            except (ConnectError, ConnectTimeout):
+                if retries_left <= 0:
+                    raise
+                retries_left -= 1
+                delay = next(delays)
+                async with Trace("retry", logger, request, kwargs) as trace:
+                    await self._network_backend.sleep(delay)
+
+    def can_handle_request(self, origin: Origin) -> bool:
+        return origin == self._origin
+
+    async def aclose(self) -> None:
+        if self._connection is not None:
+            async with Trace("close", logger, None, {}):
+                await self._connection.aclose()
+
+    def is_available(self) -> bool:
+        if self._connection is None:
+            # If HTTP/2 support is enabled, and the resulting connection could
+            # end up as HTTP/2 then we should indicate the connection as being
+            # available to service multiple requests.
+            return (
+                self._http2
+                and (self._origin.scheme == b"https" or not self._http1)
+                and not self._connect_failed
+            )
+        return self._connection.is_available()
+
+    def has_expired(self) -> bool:
+        if self._connection is None:
+            return self._connect_failed
+        return self._connection.has_expired()
+
+    def is_idle(self) -> bool:
+        if self._connection is None:
+            return self._connect_failed
+        return self._connection.is_idle()
+
+    def is_closed(self) -> bool:
+        if self._connection is None:
+            return self._connect_failed
+        return self._connection.is_closed()
+
+    def info(self) -> str:
+        if self._connection is None:
+            return "CONNECTION FAILED" if self._connect_failed else "CONNECTING"
+        return self._connection.info()
+
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__} [{self.info()}]>"
+
+    # These context managers are not used in the standard flow, but are
+    # useful for testing or working with connection instances directly.
+
+    async def __aenter__(self) -> AsyncHTTPConnection:
+        return self
+
+    async def __aexit__(
+        self,
+        exc_type: type[BaseException] | None = None,
+        exc_value: BaseException | None = None,
+        traceback: types.TracebackType | None = None,
+    ) -> None:
+        await self.aclose()