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
5package syscall
6
7import "unsafe"
8
9func 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
31func (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.
54type InterfaceAnnounceMessage struct {
55	Header IfAnnounceMsghdr
56}
57
58func (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.
64type InterfaceMulticastAddrMessage struct {
65	Header IfmaMsghdr
66	Data   []byte
67}
68
69func (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