76 lines
2.4 KiB
Go
76 lines
2.4 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package ipv4
|
|
|
|
import (
|
|
"net"
|
|
"runtime"
|
|
"strings"
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
type sysSockoptLen int32
|
|
|
|
var (
|
|
ctlOpts = [ctlMax]ctlOpt{
|
|
ctlTTL: {sysIP_RECVTTL, 1, marshalTTL, parseTTL},
|
|
ctlDst: {sysIP_RECVDSTADDR, net.IPv4len, marshalDst, parseDst},
|
|
ctlInterface: {sysIP_RECVIF, syscall.SizeofSockaddrDatalink, marshalInterface, parseInterface},
|
|
}
|
|
|
|
sockOpts = [ssoMax]sockOpt{
|
|
ssoTOS: {sysIP_TOS, ssoTypeInt},
|
|
ssoTTL: {sysIP_TTL, ssoTypeInt},
|
|
ssoMulticastTTL: {sysIP_MULTICAST_TTL, ssoTypeByte},
|
|
ssoMulticastInterface: {sysIP_MULTICAST_IF, ssoTypeInterface},
|
|
ssoMulticastLoopback: {sysIP_MULTICAST_LOOP, ssoTypeInt},
|
|
ssoReceiveTTL: {sysIP_RECVTTL, ssoTypeInt},
|
|
ssoReceiveDst: {sysIP_RECVDSTADDR, ssoTypeInt},
|
|
ssoReceiveInterface: {sysIP_RECVIF, ssoTypeInt},
|
|
ssoHeaderPrepend: {sysIP_HDRINCL, ssoTypeInt},
|
|
ssoJoinGroup: {sysMCAST_JOIN_GROUP, ssoTypeGroupReq},
|
|
ssoLeaveGroup: {sysMCAST_LEAVE_GROUP, ssoTypeGroupReq},
|
|
ssoJoinSourceGroup: {sysMCAST_JOIN_SOURCE_GROUP, ssoTypeGroupSourceReq},
|
|
ssoLeaveSourceGroup: {sysMCAST_LEAVE_SOURCE_GROUP, ssoTypeGroupSourceReq},
|
|
ssoBlockSourceGroup: {sysMCAST_BLOCK_SOURCE, ssoTypeGroupSourceReq},
|
|
ssoUnblockSourceGroup: {sysMCAST_UNBLOCK_SOURCE, ssoTypeGroupSourceReq},
|
|
}
|
|
)
|
|
|
|
func init() {
|
|
freebsdVersion, _ = syscall.SysctlUint32("kern.osreldate")
|
|
if freebsdVersion >= 1000000 {
|
|
sockOpts[ssoMulticastInterface].typ = ssoTypeIPMreqn
|
|
}
|
|
if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" {
|
|
archs, _ := syscall.Sysctl("kern.supported_archs")
|
|
for _, s := range strings.Fields(archs) {
|
|
if s == "amd64" {
|
|
freebsd32o64 = true
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (gr *sysGroupReq) setGroup(grp net.IP) {
|
|
sa := (*sysSockaddrInet)(unsafe.Pointer(&gr.Group))
|
|
sa.Len = sysSizeofSockaddrInet
|
|
sa.Family = syscall.AF_INET
|
|
copy(sa.Addr[:], grp)
|
|
}
|
|
|
|
func (gsr *sysGroupSourceReq) setSourceGroup(grp, src net.IP) {
|
|
sa := (*sysSockaddrInet)(unsafe.Pointer(&gsr.Group))
|
|
sa.Len = sysSizeofSockaddrInet
|
|
sa.Family = syscall.AF_INET
|
|
copy(sa.Addr[:], grp)
|
|
sa = (*sysSockaddrInet)(unsafe.Pointer(&gsr.Source))
|
|
sa.Len = sysSizeofSockaddrInet
|
|
sa.Family = syscall.AF_INET
|
|
copy(sa.Addr[:], src)
|
|
}
|