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// 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"
"syscall"
"unsafe"
)
var (
ctlOpts = [ctlMax]ctlOpt{
ctlTTL: {sysIP_TTL, 1, marshalTTL, parseTTL},
ctlPacketInfo: {sysIP_PKTINFO, sizeofInetPktinfo, marshalPacketInfo, parsePacketInfo},
}
sockOpts = [ssoMax]sockOpt{
ssoTOS: {sysIP_TOS, ssoTypeInt},
ssoTTL: {sysIP_TTL, ssoTypeInt},
ssoMulticastTTL: {sysIP_MULTICAST_TTL, ssoTypeInt},
ssoMulticastInterface: {sysIP_MULTICAST_IF, ssoTypeIPMreqn},
ssoMulticastLoopback: {sysIP_MULTICAST_LOOP, ssoTypeInt},
ssoReceiveTTL: {sysIP_RECVTTL, ssoTypeInt},
ssoPacketInfo: {sysIP_PKTINFO, ssoTypeInt},
ssoHeaderPrepend: {sysIP_HDRINCL, ssoTypeInt},
ssoICMPFilter: {sysICMP_FILTER, ssoTypeICMPFilter},
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 (pi *inetPktinfo) setIfindex(i int) {
pi.Ifindex = int32(i)
}
func (gr *groupReq) setGroup(grp net.IP) {
sa := (*sockaddrInet)(unsafe.Pointer(&gr.Group))
sa.Family = syscall.AF_INET
copy(sa.Addr[:], grp)
}
func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
sa := (*sockaddrInet)(unsafe.Pointer(&gsr.Group))
sa.Family = syscall.AF_INET
copy(sa.Addr[:], grp)
sa = (*sockaddrInet)(unsafe.Pointer(&gsr.Source))
sa.Family = syscall.AF_INET
copy(sa.Addr[:], src)
}
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