78 lines
1.9 KiB
Go
78 lines
1.9 KiB
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package route
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func (w *wireFormat) parseInterfaceMessage(typ RIBType, b []byte) (Message, error) {
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var extOff, bodyOff int
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if typ == sysNET_RT_IFLISTL {
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if len(b) < 20 {
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return nil, errMessageTooShort
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}
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extOff = int(nativeEndian.Uint16(b[18:20]))
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bodyOff = int(nativeEndian.Uint16(b[16:18]))
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} else {
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extOff = w.extOff
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bodyOff = w.bodyOff
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}
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if len(b) < extOff || len(b) < bodyOff {
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return nil, errInvalidMessage
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}
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l := int(nativeEndian.Uint16(b[:2]))
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if len(b) < l {
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return nil, errInvalidMessage
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}
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attrs := uint(nativeEndian.Uint32(b[4:8]))
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if attrs&sysRTA_IFP == 0 {
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return nil, nil
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}
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m := &InterfaceMessage{
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Version: int(b[2]),
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Type: int(b[3]),
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Flags: int(nativeEndian.Uint32(b[8:12])),
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Index: int(nativeEndian.Uint16(b[12:14])),
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Addrs: make([]Addr, sysRTAX_MAX),
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extOff: extOff,
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raw: b[:l],
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}
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a, err := parseLinkAddr(b[bodyOff:])
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if err != nil {
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return nil, err
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}
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m.Addrs[sysRTAX_IFP] = a
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m.Name = a.(*LinkAddr).Name
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return m, nil
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}
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func (w *wireFormat) parseInterfaceAddrMessage(typ RIBType, b []byte) (Message, error) {
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var bodyOff int
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if typ == sysNET_RT_IFLISTL {
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if len(b) < 24 {
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return nil, errMessageTooShort
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}
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bodyOff = int(nativeEndian.Uint16(b[16:18]))
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} else {
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bodyOff = w.bodyOff
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}
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if len(b) < bodyOff {
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return nil, errInvalidMessage
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}
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l := int(nativeEndian.Uint16(b[:2]))
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if len(b) < l {
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return nil, errInvalidMessage
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}
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m := &InterfaceAddrMessage{
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Version: int(b[2]),
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Type: int(b[3]),
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Flags: int(nativeEndian.Uint32(b[8:12])),
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Index: int(nativeEndian.Uint16(b[12:14])),
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raw: b[:l],
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}
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var err error
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m.Addrs, err = parseAddrs(uint(nativeEndian.Uint32(b[4:8])), parseKernelInetAddr, b[bodyOff:])
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if err != nil {
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return nil, err
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}
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return m, nil
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}
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