File size: 1,946 Bytes
13c2bf6 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 | // Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build darwin || dragonfly || netbsd
package routebsd
import (
"runtime"
"syscall"
)
func (w *wireFormat) parseInterfaceMessage(b []byte) (Message, error) {
if len(b) < w.bodyOff {
return nil, errMessageTooShort
}
l := int(nativeEndian.Uint16(b[:2]))
if len(b) < l {
return nil, errInvalidMessage
}
attrs := uint(nativeEndian.Uint32(b[4:8]))
m := &InterfaceMessage{
Version: int(b[2]),
Type: int(b[3]),
Addrs: make([]Addr, syscall.RTAX_MAX),
Flags: int(nativeEndian.Uint32(b[8:12])),
Index: int(nativeEndian.Uint16(b[12:14])),
extOff: w.extOff,
raw: b[:l],
}
// We used to require that RTA_IFP always be set.
// It turns out that on darwin messages about the
// utun interface may not include a name. Issue #71064.
if attrs&syscall.RTA_IFP != 0 {
a, err := parseLinkAddr(b[w.bodyOff:])
if err != nil {
return nil, err
}
m.Addrs[syscall.RTAX_IFP] = a
m.Name = a.(*LinkAddr).Name
} else {
// DragonFly seems to have unnamed interfaces
// that we can't look up again. Just skip them.
if runtime.GOOS == "dragonfly" {
return nil, nil
}
}
return m, nil
}
func (w *wireFormat) parseInterfaceAddrMessage(b []byte) (Message, error) {
if len(b) < w.bodyOff {
return nil, errMessageTooShort
}
l := int(nativeEndian.Uint16(b[:2]))
if len(b) < l {
return nil, errInvalidMessage
}
m := &InterfaceAddrMessage{
Version: int(b[2]),
Type: int(b[3]),
Flags: int(nativeEndian.Uint32(b[8:12])),
raw: b[:l],
}
if runtime.GOOS == "netbsd" {
m.Index = int(nativeEndian.Uint16(b[16:18]))
} else {
m.Index = int(nativeEndian.Uint16(b[12:14]))
}
var err error
m.Addrs, err = parseAddrs(uint(nativeEndian.Uint32(b[4:8])), b[w.bodyOff:])
if err != nil {
return nil, err
}
return m, nil
}
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