sys_freebsd.go (3600B)
1 // Copyright 2014 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 ipv4 6 7 import ( 8 "net" 9 "runtime" 10 "strings" 11 "syscall" 12 "unsafe" 13 14 "golang.org/x/net/internal/iana" 15 "golang.org/x/net/internal/socket" 16 17 "golang.org/x/sys/unix" 18 ) 19 20 const sockoptReceiveInterface = unix.IP_RECVIF 21 22 var ( 23 ctlOpts = [ctlMax]ctlOpt{ 24 ctlTTL: {unix.IP_RECVTTL, 1, marshalTTL, parseTTL}, 25 ctlDst: {unix.IP_RECVDSTADDR, net.IPv4len, marshalDst, parseDst}, 26 ctlInterface: {unix.IP_RECVIF, syscall.SizeofSockaddrDatalink, marshalInterface, parseInterface}, 27 } 28 29 sockOpts = map[int]*sockOpt{ 30 ssoTOS: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_TOS, Len: 4}}, 31 ssoTTL: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_TTL, Len: 4}}, 32 ssoMulticastTTL: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_MULTICAST_TTL, Len: 1}}, 33 ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_MULTICAST_IF, Len: 4}}, 34 ssoMulticastLoopback: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_MULTICAST_LOOP, Len: 4}}, 35 ssoReceiveTTL: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_RECVTTL, Len: 4}}, 36 ssoReceiveDst: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_RECVDSTADDR, Len: 4}}, 37 ssoReceiveInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_RECVIF, Len: 4}}, 38 ssoHeaderPrepend: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_HDRINCL, Len: 4}}, 39 ssoJoinGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}, 40 ssoLeaveGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq}, 41 ssoJoinSourceGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}, 42 ssoLeaveSourceGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}, 43 ssoBlockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}, 44 ssoUnblockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq}, 45 } 46 ) 47 48 func init() { 49 freebsdVersion, _ = syscall.SysctlUint32("kern.osreldate") 50 if freebsdVersion >= 1000000 { 51 sockOpts[ssoMulticastInterface] = &sockOpt{Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_MULTICAST_IF, Len: unix.SizeofIPMreqn}, typ: ssoTypeIPMreqn} 52 } 53 if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" { 54 archs, _ := syscall.Sysctl("kern.supported_archs") 55 for _, s := range strings.Fields(archs) { 56 if s == "amd64" { 57 compatFreeBSD32 = true 58 break 59 } 60 } 61 } 62 } 63 64 func (gr *groupReq) setGroup(grp net.IP) { 65 sa := (*sockaddrInet)(unsafe.Pointer(&gr.Group)) 66 sa.Len = sizeofSockaddrInet 67 sa.Family = syscall.AF_INET 68 copy(sa.Addr[:], grp) 69 } 70 71 func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) { 72 sa := (*sockaddrInet)(unsafe.Pointer(&gsr.Group)) 73 sa.Len = sizeofSockaddrInet 74 sa.Family = syscall.AF_INET 75 copy(sa.Addr[:], grp) 76 sa = (*sockaddrInet)(unsafe.Pointer(&gsr.Source)) 77 sa.Len = sizeofSockaddrInet 78 sa.Family = syscall.AF_INET 79 copy(sa.Addr[:], src) 80 }