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type option_code = | PAD [ @ id 0 ] | SUBNET_MASK [ @ id 1 ] | TIME_OFFSET [ @ id 2 ] | ROUTERS [ @ id 3 ] | TIME_SERVERS [ @ id 4 ] | NAME_SERVERS [ @ id 5 ] | DNS_SERVERS [ @ id 6 ] | LOG_SERVERS [ @ id 7 ] | COOKIE_SERVERS [ @ id 8 ] | LPR_SERVERS [ ... |
let int_to_option_code_exn v = some_or_invalid int_to_option_code v |
type htype = | Ethernet_10mb | Other [ @@ deriving sexp ] |
type flags = | Broadcast | Unicast [ @@ deriving sexp ] |
type client_id = | Hwaddr of Macaddr_sexp . t | Id of int * string [ @@ deriving sexp ] |
type dhcp_option = | Pad | Subnet_mask of Ipaddr_sexp . V4 . t | Time_offset of int32 | Routers of Ipaddr_sexp . V4 . t list | Time_servers of Ipaddr_sexp . V4 . t list | Name_servers of Ipaddr_sexp . V4 . t list | Dns_servers of Ipaddr_sexp . V4 . t list | Log_servers of Ipaddr_sexp . V4... |
type pkt = { srcmac : Macaddr_sexp . t ; dstmac : Macaddr_sexp . t ; srcip : Ipaddr_sexp . V4 . t ; dstip : Ipaddr_sexp . V4 . t ; srcport : int ; dstport : int ; op : op ; htype : htype ; hlen : int ; hops : int ; xid : int32 ; secs : int ; flags : flags ; ciaddr ... |
let options_of_buf buf buf_len = let rec collect buf options = let code = Cstruct . get_uint8 buf 0 in let padding ( ) = collect ( Cstruct . shift buf 1 ) options in match int_to_option_code_exn code with | PAD -> padding ( ) | END -> options | _ -> let len = Cstruct . get_uint8 buf 1 i... |
let buf_of_options sbuf options = let open Cstruct in let put_code code buf = set_uint8 buf 0 code ; shift buf 1 in let put_len len buf = if len > 255 then invalid_arg ( " option len is too big : " ^ ( string_of_int len ) ) ; set_uint8 buf 0 len ; shift buf 1 in let put_8 v buf = set_uint8... |
let pkt_of_buf buf len = let open Printf in let wrap ( ) = let min_len = sizeof_dhcp + Ethernet . Packet . sizeof_ethernet + Ipv4_wire . sizeof_ipv4 + Udp_wire . sizeof_udp in let * ( ) = guard ( len >= min_len ) ( sprintf " packet is too small : % d < % d " len min_len ) in let... |
let pkt_into_buf pkt buf = let eth , rest = Cstruct . split buf Ethernet . Packet . sizeof_ethernet in let ip , rest ' = Cstruct . split rest Ipv4_wire . sizeof_ipv4 in let udp , dhcp = Cstruct . split rest ' Udp_wire . sizeof_udp in set_dhcp_op dhcp ( op_to_int pkt . op ) ; set_dhcp... |
let buf_of_pkt pkg = let dhcp = Cstruct . create 2048 in let l = pkt_into_buf pkg dhcp in Cstruct . sub dhcp 0 l |
let is_dhcp buf _len = let aux buf = let * eth_header , eth_payload = Ethernet . Packet . of_cstruct buf in match eth_header . Ethernet . Packet . ethertype with | ` ARP | ` IPv6 -> Ok false | ` IPv4 -> let * ipv4_header , ipv4_payload = Ipv4_packet . Unmarshal . of_cstruct eth_paylo... |
let collect_options f options = filter_map f options |> List . flatten |
let client_id_of_pkt pkt = match find_option ( function Client_id id -> Some id | _ -> None ) pkt . options with | Some id -> id | None -> Hwaddr pkt . chaddr |
let to_hum f x = Sexplib . Sexp . to_string_hum ( f x ) |
let client_id_to_string = to_hum sexp_of_client_id |
let pkt_to_string = to_hum sexp_of_pkt |
let dhcp_option_to_string = to_hum sexp_of_dhcp_option |
let find_subnet_mask = find_option ( function Subnet_mask x -> Some x | _ -> None ) |
let find_time_offset = find_option ( function Time_offset x -> Some x | _ -> None ) |
let collect_routers = collect_options ( function Routers x -> Some x | _ -> None ) |
let collect_time_servers = collect_options ( function Time_servers x -> Some x | _ -> None ) |
let collect_name_servers = collect_options ( function Name_servers x -> Some x | _ -> None ) |
let collect_dns_servers = collect_options ( function Dns_servers x -> Some x | _ -> None ) |
let collect_log_servers = collect_options ( function Log_servers x -> Some x | _ -> None ) |
let collect_cookie_servers = collect_options ( function Cookie_servers x -> Some x | _ -> None ) |
let collect_lpr_servers = collect_options ( function Lpr_servers x -> Some x | _ -> None ) |
let collect_impress_servers = collect_options ( function Impress_servers x -> Some x | _ -> None ) |
let collect_rsc_location_servers = collect_options ( function Rsclocation_servers x -> Some x | _ -> None ) |
let find_hostname = find_option ( function Hostname x -> Some x | _ -> None ) |
let find_bootfile_size = find_option ( function Bootfile_size x -> Some x | _ -> None ) |
let find_merit_dumpfile = find_option ( function Merit_dumpfile x -> Some x | _ -> None ) |
let find_domain_name = find_option ( function Domain_name x -> Some x | _ -> None ) |
let find_swap_server = find_option ( function Swap_server x -> Some x | _ -> None ) |
let find_root_path = find_option ( function Root_path x -> Some x | _ -> None ) |
let find_extension_path = find_option ( function Extension_path x -> Some x | _ -> None ) |
let find_ipforwarding = find_option ( function Ipforwarding x -> Some x | _ -> None ) |
let find_nlsr = find_option ( function Nlsr x -> Some x | _ -> None ) |
let collect_policy_filters = collect_options ( function Policy_filters x -> Some x | _ -> None ) |
let find_max_datagram = find_option ( function Max_datagram x -> Some x | _ -> None ) |
let find_default_ip_ttl = find_option ( function Default_ip_ttl x -> Some x | _ -> None ) |
let find_pmtu_ageing_timo = find_option ( function Pmtu_ageing_timo x -> Some x | _ -> None ) |
let find_pmtu_plateau_table = find_option ( function Pmtu_plateau_table x -> Some x | _ -> None ) |
let find_interface_mtu = find_option ( function Interface_mtu x -> Some x | _ -> None ) |
let find_all_subnets_local = find_option ( function All_subnets_local x -> Some x | _ -> None ) |
let find_broadcast_addr = find_option ( function Broadcast_addr x -> Some x | _ -> None ) |
let find_perform_mask_discovery = find_option ( function Perform_mask_discovery x -> Some x | _ -> None ) |
let find_mask_supplier = find_option ( function Mask_supplier x -> Some x | _ -> None ) |
let find_perform_router_disc = find_option ( function Perform_router_disc x -> Some x | _ -> None ) |
let find_router_sol_addr = find_option ( function Router_sol_addr x -> Some x | _ -> None ) |
let collect_static_routes = collect_options ( function Static_routes x -> Some x | _ -> None ) |
let find_trailer_encapsulation = find_option ( function Trailer_encapsulation x -> Some x | _ -> None ) |
let find_arp_cache_timo = find_option ( function Arp_cache_timo x -> Some x | _ -> None ) |
let find_ethernet_encapsulation = find_option ( function Ethernet_encapsulation x -> Some x | _ -> None ) |
let find_tcp_default_ttl = find_option ( function Tcp_default_ttl x -> Some x | _ -> None ) |
let find_tcp_keepalive_interval = find_option ( function Tcp_keepalive_interval x -> Some x | _ -> None ) |
let find_tcp_keepalive_garbage = find_option ( function Tcp_keepalive_garbage x -> Some x | _ -> None ) |
let find_nis_domain = find_option ( function Nis_domain x -> Some x | _ -> None ) |
let collect_nis_servers = collect_options ( function Nis_servers x -> Some x | _ -> None ) |
let collect_ntp_servers = collect_options ( function Ntp_servers x -> Some x | _ -> None ) |
let find_vendor_specific = find_option ( function Vendor_specific x -> Some x | _ -> None ) |
let collect_netbios_name_servers = collect_options ( function Netbios_name_servers x -> Some x | _ -> None ) |
let collect_netbios_datagram_distrib_servers = collect_options ( function Netbios_datagram_distrib_servers x -> Some x | _ -> None ) |
let find_netbios_node = find_option ( function Netbios_node x -> Some x | _ -> None ) |
let find_netbios_scope = find_option ( function Netbios_scope x -> Some x | _ -> None ) |
let collect_xwindow_font_servers = collect_options ( function Xwindow_font_servers x -> Some x | _ -> None ) |
let collect_xwindow_display_managers = collect_options ( function Xwindow_display_managers x -> Some x | _ -> None ) |
let find_request_ip = find_option ( function Request_ip x -> Some x | _ -> None ) |
let find_ip_lease_time = find_option ( function Ip_lease_time x -> Some x | _ -> None ) |
let find_option_overload = find_option ( function Option_overload x -> Some x | _ -> None ) |
let find_message_type = find_option ( function Message_type x -> Some x | _ -> None ) |
let find_server_identifier = find_option ( function Server_identifier x -> Some x | _ -> None ) |
let find_parameter_requests = find_option ( function Parameter_requests x -> Some x | _ -> None ) |
let find_message = find_option ( function Message x -> Some x | _ -> None ) |
let find_max_message = find_option ( function Max_message x -> Some x | _ -> None ) |
let find_renewal_t1 = find_option ( function Renewal_t1 x -> Some x | _ -> None ) |
let find_rebinding_t2 = find_option ( function Rebinding_t2 x -> Some x | _ -> None ) |
let find_vendor_class_id = find_option ( function Vendor_class_id x -> Some x | _ -> None ) |
let find_client_id = find_option ( function Client_id x -> Some x | _ -> None ) |
let find_netware_ip_domain = find_option ( function Netware_ip_domain x -> Some x | _ -> None ) |
let find_netware_ip_option = find_option ( function Netware_ip_option x -> Some x | _ -> None ) |
let find_nis_plus_domain = find_option ( function Nis_plus_domain x -> Some x | _ -> None ) |
let collect_nis_plus_servers = collect_options ( function Nis_plus_servers x -> Some x | _ -> None ) |
let find_tftp_server_name = find_option ( function Tftp_server_name x -> Some x | _ -> None ) |
let find_bootfile_name = find_option ( function Bootfile_name x -> Some x | _ -> None ) |
let collect_mobile_ip_home_agent = collect_options ( function Mobile_ip_home_agent x -> Some x | _ -> None ) |
let collect_smtp_servers = collect_options ( function Smtp_servers x -> Some x | _ -> None ) |
let collect_pop3_servers = collect_options ( function Pop3_servers x -> Some x | _ -> None ) |
let collect_nntp_servers = collect_options ( function Nntp_servers x -> Some x | _ -> None ) |
let collect_www_servers = collect_options ( function Www_servers x -> Some x | _ -> None ) |
let collect_finger_servers = collect_options ( function Finger_servers x -> Some x | _ -> None ) |
let collect_irc_servers = collect_options ( function Irc_servers x -> Some x | _ -> None ) |
let collect_streettalk_servers = collect_options ( function Streettalk_servers x -> Some x | _ -> None ) |
let collect_streettalk_da = collect_options ( function Streettalk_da x -> Some x | _ -> None ) |
let find_user_class = find_option ( function User_class x -> Some x | _ -> None ) |
let find_directory_agent = find_option ( function Directory_agent x -> Some x | _ -> None ) |
let find_service_scope = find_option ( function Service_scope x -> Some x | _ -> None ) |
let find_rapid_commit = find_option ( function Rapid_commit -> Some Rapid_commit | _ -> None ) |
let find_client_fqdn = find_option ( function Client_fqdn x -> Some x | _ -> None ) |
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