Source file src/pkg/syscall/route_darwin.go

     1	// Copyright 2011 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	package syscall
     6	
     7	import "unsafe"
     8	
     9	func (any *anyMessage) toRoutingMessage(b []byte) RoutingMessage {
    10		switch any.Type {
    11		case RTM_ADD, RTM_DELETE, RTM_CHANGE, RTM_GET, RTM_LOSING, RTM_REDIRECT, RTM_MISS, RTM_LOCK, RTM_RESOLVE:
    12			p := (*RouteMessage)(unsafe.Pointer(any))
    13			return &RouteMessage{Header: p.Header, Data: b[SizeofRtMsghdr:any.Msglen]}
    14		case RTM_IFINFO:
    15			p := (*InterfaceMessage)(unsafe.Pointer(any))
    16			return &InterfaceMessage{Header: p.Header, Data: b[SizeofIfMsghdr:any.Msglen]}
    17		case RTM_NEWADDR, RTM_DELADDR:
    18			p := (*InterfaceAddrMessage)(unsafe.Pointer(any))
    19			return &InterfaceAddrMessage{Header: p.Header, Data: b[SizeofIfaMsghdr:any.Msglen]}
    20		case RTM_NEWMADDR2, RTM_DELMADDR:
    21			p := (*InterfaceMulticastAddrMessage)(unsafe.Pointer(any))
    22			return &InterfaceMulticastAddrMessage{Header: p.Header, Data: b[SizeofIfmaMsghdr2:any.Msglen]}
    23		}
    24		return nil
    25	}
    26	
    27	// InterfaceMulticastAddrMessage represents a routing message
    28	// containing network interface address entries.
    29	//
    30	// Deprecated: Use golang.org/x/net/route instead.
    31	type InterfaceMulticastAddrMessage struct {
    32		Header IfmaMsghdr2
    33		Data   []byte
    34	}
    35	
    36	func (m *InterfaceMulticastAddrMessage) sockaddr() ([]Sockaddr, error) {
    37		var sas [RTAX_MAX]Sockaddr
    38		b := m.Data[:]
    39		for i := uint(0); i < RTAX_MAX && len(b) >= minRoutingSockaddrLen; i++ {
    40			if m.Header.Addrs&(1<<i) == 0 {
    41				continue
    42			}
    43			rsa := (*RawSockaddr)(unsafe.Pointer(&b[0]))
    44			switch rsa.Family {
    45			case AF_LINK:
    46				sa, err := parseSockaddrLink(b)
    47				if err != nil {
    48					return nil, err
    49				}
    50				sas[i] = sa
    51				b = b[rsaAlignOf(int(rsa.Len)):]
    52			case AF_INET, AF_INET6:
    53				sa, err := parseSockaddrInet(b, rsa.Family)
    54				if err != nil {
    55					return nil, err
    56				}
    57				sas[i] = sa
    58				b = b[rsaAlignOf(int(rsa.Len)):]
    59			default:
    60				sa, l, err := parseLinkLayerAddr(b)
    61				if err != nil {
    62					return nil, err
    63				}
    64				sas[i] = sa
    65				b = b[l:]
    66			}
    67		}
    68		return sas[:], nil
    69	}
    70	

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