github.com/hxx258456/ccgo@v0.0.5-0.20230213014102-48b35f46f66f/net/route/interface_multicast.go (about)

     1  // Copyright 2016 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build darwin || dragonfly || freebsd
     6  // +build darwin dragonfly freebsd
     7  
     8  package route
     9  
    10  func (w *wireFormat) parseInterfaceMulticastAddrMessage(_ RIBType, b []byte) (Message, error) {
    11  	if len(b) < w.bodyOff {
    12  		return nil, errMessageTooShort
    13  	}
    14  	l := int(nativeEndian.Uint16(b[:2]))
    15  	if len(b) < l {
    16  		return nil, errInvalidMessage
    17  	}
    18  	m := &InterfaceMulticastAddrMessage{
    19  		Version: int(b[2]),
    20  		Type:    int(b[3]),
    21  		Flags:   int(nativeEndian.Uint32(b[8:12])),
    22  		Index:   int(nativeEndian.Uint16(b[12:14])),
    23  		raw:     b[:l],
    24  	}
    25  	var err error
    26  	m.Addrs, err = parseAddrs(uint(nativeEndian.Uint32(b[4:8])), parseKernelInetAddr, b[w.bodyOff:])
    27  	if err != nil {
    28  		return nil, err
    29  	}
    30  	return m, nil
    31  }