github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/x/net/ipv4/sys_freebsd.go (about) 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 15 type sysSockoptLen int32 16 17 var ( 18 ctlOpts = [ctlMax]ctlOpt{ 19 ctlTTL: {sysIP_RECVTTL, 1, marshalTTL, parseTTL}, 20 ctlDst: {sysIP_RECVDSTADDR, net.IPv4len, marshalDst, parseDst}, 21 ctlInterface: {sysIP_RECVIF, syscall.SizeofSockaddrDatalink, marshalInterface, parseInterface}, 22 } 23 24 sockOpts = [ssoMax]sockOpt{ 25 ssoTOS: {sysIP_TOS, ssoTypeInt}, 26 ssoTTL: {sysIP_TTL, ssoTypeInt}, 27 ssoMulticastTTL: {sysIP_MULTICAST_TTL, ssoTypeByte}, 28 ssoMulticastInterface: {sysIP_MULTICAST_IF, ssoTypeInterface}, 29 ssoMulticastLoopback: {sysIP_MULTICAST_LOOP, ssoTypeInt}, 30 ssoReceiveTTL: {sysIP_RECVTTL, ssoTypeInt}, 31 ssoReceiveDst: {sysIP_RECVDSTADDR, ssoTypeInt}, 32 ssoReceiveInterface: {sysIP_RECVIF, ssoTypeInt}, 33 ssoHeaderPrepend: {sysIP_HDRINCL, ssoTypeInt}, 34 ssoJoinGroup: {sysMCAST_JOIN_GROUP, ssoTypeGroupReq}, 35 ssoLeaveGroup: {sysMCAST_LEAVE_GROUP, ssoTypeGroupReq}, 36 ssoJoinSourceGroup: {sysMCAST_JOIN_SOURCE_GROUP, ssoTypeGroupSourceReq}, 37 ssoLeaveSourceGroup: {sysMCAST_LEAVE_SOURCE_GROUP, ssoTypeGroupSourceReq}, 38 ssoBlockSourceGroup: {sysMCAST_BLOCK_SOURCE, ssoTypeGroupSourceReq}, 39 ssoUnblockSourceGroup: {sysMCAST_UNBLOCK_SOURCE, ssoTypeGroupSourceReq}, 40 } 41 ) 42 43 func init() { 44 freebsdVersion, _ = syscall.SysctlUint32("kern.osreldate") 45 if freebsdVersion >= 1000000 { 46 sockOpts[ssoMulticastInterface].typ = ssoTypeIPMreqn 47 } 48 if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" { 49 archs, _ := syscall.Sysctl("kern.supported_archs") 50 for _, s := range strings.Fields(archs) { 51 if s == "amd64" { 52 freebsd32o64 = true 53 break 54 } 55 } 56 } 57 } 58 59 func (gr *sysGroupReq) setGroup(grp net.IP) { 60 sa := (*sysSockaddrInet)(unsafe.Pointer(&gr.Group)) 61 sa.Len = sysSizeofSockaddrInet 62 sa.Family = syscall.AF_INET 63 copy(sa.Addr[:], grp) 64 } 65 66 func (gsr *sysGroupSourceReq) setSourceGroup(grp, src net.IP) { 67 sa := (*sysSockaddrInet)(unsafe.Pointer(&gsr.Group)) 68 sa.Len = sysSizeofSockaddrInet 69 sa.Family = syscall.AF_INET 70 copy(sa.Addr[:], grp) 71 sa = (*sysSockaddrInet)(unsafe.Pointer(&gsr.Source)) 72 sa.Len = sysSizeofSockaddrInet 73 sa.Family = syscall.AF_INET 74 copy(sa.Addr[:], src) 75 }