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 // We don't support sockaddr_mpls for now. 14 p.Header.Addrs &= RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_GENMASK | RTA_IFA | RTA_IFP | RTA_BRD | RTA_AUTHOR 15 return &RouteMessage{Header: p.Header, Data: b[SizeofRtMsghdr:any.Msglen]} 16 case RTM_IFINFO: 17 p := (*InterfaceMessage)(unsafe.Pointer(any)) 18 return &InterfaceMessage{Header: p.Header, Data: b[SizeofIfMsghdr:any.Msglen]} 19 case RTM_IFANNOUNCE: 20 p := (*InterfaceAnnounceMessage)(unsafe.Pointer(any)) 21 return &InterfaceAnnounceMessage{Header: p.Header} 22 case RTM_NEWADDR, RTM_DELADDR: 23 p := (*InterfaceAddrMessage)(unsafe.Pointer(any)) 24 return &InterfaceAddrMessage{Header: p.Header, Data: b[SizeofIfaMsghdr:any.Msglen]} 25 case RTM_NEWMADDR, RTM_DELMADDR: 26 p := (*InterfaceMulticastAddrMessage)(unsafe.Pointer(any)) 27 return &InterfaceMulticastAddrMessage{Header: p.Header, Data: b[SizeofIfmaMsghdr:any.Msglen]} 28 } 29 return nil 30 } 31 32 // InterfaceAnnounceMessage represents a routing message containing 33 // network interface arrival and departure information. 34 type InterfaceAnnounceMessage struct { 35 Header IfAnnounceMsghdr 36 } 37 38 func (m *InterfaceAnnounceMessage) sockaddr() ([]Sockaddr, error) { return nil, nil } 39 40 // InterfaceMulticastAddrMessage represents a routing message 41 // containing network interface address entries. 42 type InterfaceMulticastAddrMessage struct { 43 Header IfmaMsghdr 44 Data []byte 45 } 46 47 func (m *InterfaceMulticastAddrMessage) sockaddr() ([]Sockaddr, error) { 48 var sas [RTAX_MAX]Sockaddr 49 b := m.Data[:] 50 for i := uint(0); i < RTAX_MAX && len(b) >= minRoutingSockaddrLen; i++ { 51 if m.Header.Addrs&(1<<i) == 0 { 52 continue 53 } 54 rsa := (*RawSockaddr)(unsafe.Pointer(&b[0])) 55 switch rsa.Family { 56 case AF_LINK: 57 sa, err := parseSockaddrLink(b) 58 if err != nil { 59 return nil, err 60 } 61 sas[i] = sa 62 b = b[rsaAlignOf(int(rsa.Len)):] 63 case AF_INET, AF_INET6: 64 sa, err := parseSockaddrInet(b, rsa.Family) 65 if err != nil { 66 return nil, err 67 } 68 sas[i] = sa 69 b = b[rsaAlignOf(int(rsa.Len)):] 70 default: 71 sa, l, err := parseLinkLayerAddr(b) 72 if err != nil { 73 return nil, err 74 } 75 sas[i] = sa 76 b = b[l:] 77 } 78 } 79 return sas[:], nil 80 } 81
