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 // See http://www.freebsd.org/doc/en/books/porters-handbook/freebsd-versions.html. 10 var freebsdVersion uint32 11 12 func init() { 13 freebsdVersion, _ = SysctlUint32("kern.osreldate") 14 conf, _ := Sysctl("kern.conftxt") 15 for i, j := 0, 0; j < len(conf); j++ { 16 if conf[j] != '\n' { 17 continue 18 } 19 s := conf[i:j] 20 i = j + 1 21 if len(s) > len("machine") && s[:len("machine")] == "machine" { 22 s = s[len("machine"):] 23 for k := 0; k < len(s); k++ { 24 if s[k] == ' ' || s[k] == '\t' { 25 s = s[1:] 26 } 27 break 28 } 29 freebsdConfArch = s 30 break 31 } 32 } 33 } 34 35 func (any *anyMessage) toRoutingMessage(b []byte) RoutingMessage { 36 switch any.Type { 37 case RTM_ADD, RTM_DELETE, RTM_CHANGE, RTM_GET, RTM_LOSING, RTM_REDIRECT, RTM_MISS, RTM_LOCK, RTM_RESOLVE: 38 return any.parseRouteMessage(b) 39 case RTM_IFINFO: 40 return any.parseInterfaceMessage(b) 41 case RTM_IFANNOUNCE: 42 p := (*InterfaceAnnounceMessage)(unsafe.Pointer(any)) 43 return &InterfaceAnnounceMessage{Header: p.Header} 44 case RTM_NEWADDR, RTM_DELADDR: 45 p := (*InterfaceAddrMessage)(unsafe.Pointer(any)) 46 return &InterfaceAddrMessage{Header: p.Header, Data: b[SizeofIfaMsghdr:any.Msglen]} 47 case RTM_NEWMADDR, RTM_DELMADDR: 48 p := (*InterfaceMulticastAddrMessage)(unsafe.Pointer(any)) 49 return &InterfaceMulticastAddrMessage{Header: p.Header, Data: b[SizeofIfmaMsghdr:any.Msglen]} 50 } 51 return nil 52 } 53 54 // InterfaceAnnounceMessage represents a routing message containing 55 // network interface arrival and departure information. 56 type InterfaceAnnounceMessage struct { 57 Header IfAnnounceMsghdr 58 } 59 60 func (m *InterfaceAnnounceMessage) sockaddr() ([]Sockaddr, error) { return nil, nil } 61 62 // InterfaceMulticastAddrMessage represents a routing message 63 // containing network interface address entries. 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
