90 lines
2.1 KiB
Go
90 lines
2.1 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 (*wireFormat) parseInterfaceMessage(_ RIBType, b []byte) (Message, error) {
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if len(b) < 32 {
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return nil, errMessageTooShort
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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[12:16]))
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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[16:20])),
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Index: int(nativeEndian.Uint16(b[6:8])),
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Addrs: make([]Addr, sysRTAX_MAX),
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raw: b[:l],
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}
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ll := int(nativeEndian.Uint16(b[4:6]))
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if len(b) < ll {
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return nil, errInvalidMessage
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}
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a, err := parseLinkAddr(b[ll:])
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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 (*wireFormat) parseInterfaceAddrMessage(_ RIBType, b []byte) (Message, error) {
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if len(b) < 24 {
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return nil, errMessageTooShort
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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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bodyOff := int(nativeEndian.Uint16(b[4:6]))
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if len(b) < bodyOff {
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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[12:16])),
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Index: int(nativeEndian.Uint16(b[6:8])),
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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[12:16])), 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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func (*wireFormat) parseInterfaceAnnounceMessage(_ RIBType, b []byte) (Message, error) {
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if len(b) < 26 {
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return nil, errMessageTooShort
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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 := &InterfaceAnnounceMessage{
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Version: int(b[2]),
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Type: int(b[3]),
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Index: int(nativeEndian.Uint16(b[6:8])),
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What: int(nativeEndian.Uint16(b[8:10])),
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raw: b[:l],
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}
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for i := 0; i < 16; i++ {
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if b[10+i] != 0 {
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continue
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}
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m.Name = string(b[10 : 10+i])
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break
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}
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return m, nil
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}
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