Source file src/syscall/route_freebsd.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 init() {
    10		conf, _ := Sysctl("kern.conftxt")
    11		for i, j := 0, 0; j < len(conf); j++ {
    12			if conf[j] != '\n' {
    13				continue
    14			}
    15			s := conf[i:j]
    16			i = j + 1
    17			if len(s) > len("machine") && s[:len("machine")] == "machine" {
    18				s = s[len("machine"):]
    19				for k := 0; k < len(s); k++ {
    20					if s[k] == ' ' || s[k] == '\t' {
    21						s = s[1:]
    22					}
    23					break
    24				}
    25				freebsdConfArch = s
    26				break
    27			}
    28		}
    29	}
    30	
    31	func (any *anyMessage) toRoutingMessage(b []byte) RoutingMessage {
    32		switch any.Type {
    33		case RTM_ADD, RTM_DELETE, RTM_CHANGE, RTM_GET, RTM_LOSING, RTM_REDIRECT, RTM_MISS, RTM_LOCK, RTM_RESOLVE:
    34			return any.parseRouteMessage(b)
    35		case RTM_IFINFO:
    36			return any.parseInterfaceMessage(b)
    37		case RTM_IFANNOUNCE:
    38			p := (*InterfaceAnnounceMessage)(unsafe.Pointer(any))
    39			return &InterfaceAnnounceMessage{Header: p.Header}
    40		case RTM_NEWADDR, RTM_DELADDR:
    41			p := (*InterfaceAddrMessage)(unsafe.Pointer(any))
    42			return &InterfaceAddrMessage{Header: p.Header, Data: b[SizeofIfaMsghdr:any.Msglen]}
    43		case RTM_NEWMADDR, RTM_DELMADDR:
    44			p := (*InterfaceMulticastAddrMessage)(unsafe.Pointer(any))
    45			return &InterfaceMulticastAddrMessage{Header: p.Header, Data: b[SizeofIfmaMsghdr:any.Msglen]}
    46		}
    47		return nil
    48	}
    49	
    50	// InterfaceAnnounceMessage represents a routing message containing
    51	// network interface arrival and departure information.
    52	//
    53	// Deprecated: Use golang.org/x/net/route instead.
    54	type InterfaceAnnounceMessage struct {
    55		Header IfAnnounceMsghdr
    56	}
    57	
    58	func (m *InterfaceAnnounceMessage) sockaddr() ([]Sockaddr, error) { return nil, nil }
    59	
    60	// InterfaceMulticastAddrMessage represents a routing message
    61	// containing network interface address entries.
    62	//
    63	// Deprecated: Use golang.org/x/net/route instead.
    64	type InterfaceMulticastAddrMessage struct {
    65		Header IfmaMsghdr
    66		Data   []byte
    67	}
    68	
    69	func (m *InterfaceMulticastAddrMessage) sockaddr() ([]Sockaddr, error) {
    70		var sas [RTAX_MAX]Sockaddr
    71		b := m.Data[:]
    72		for i := uint(0); i < RTAX_MAX && len(b) >= minRoutingSockaddrLen; i++ {
    73			if m.Header.Addrs&(1<<i) == 0 {
    74				continue
    75			}
    76			rsa := (*RawSockaddr)(unsafe.Pointer(&b[0]))
    77			switch rsa.Family {
    78			case AF_LINK:
    79				sa, err := parseSockaddrLink(b)
    80				if err != nil {
    81					return nil, err
    82				}
    83				sas[i] = sa
    84				b = b[rsaAlignOf(int(rsa.Len)):]
    85			case AF_INET, AF_INET6:
    86				sa, err := parseSockaddrInet(b, rsa.Family)
    87				if err != nil {
    88					return nil, err
    89				}
    90				sas[i] = sa
    91				b = b[rsaAlignOf(int(rsa.Len)):]
    92			default:
    93				sa, l, err := parseLinkLayerAddr(b)
    94				if err != nil {
    95					return nil, err
    96				}
    97				sas[i] = sa
    98				b = b[l:]
    99			}
   100		}
   101		return sas[:], nil
   102	}
   103	

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