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ipv4
batch.go
control.go
control_bsd.go
control_pktinfo.go
control_stub.go
control_unix.go
control_windows.go
control_zos.go
dgramopt.go
doc.go
endpoint.go
genericopt.go
header.go
helper.go
iana.go
icmp.go
icmp_linux.go
icmp_stub.go
packet.go
payload.go
payload_cmsg.go
payload_nocmsg.go
sockopt.go
sockopt_posix.go
sockopt_stub.go
sys_aix.go
sys_asmreq.go
sys_asmreq_stub.go
sys_asmreqn.go
sys_asmreqn_stub.go
sys_bpf.go
sys_bpf_stub.go
sys_bsd.go
sys_darwin.go
sys_dragonfly.go
sys_freebsd.go
sys_linux.go
sys_solaris.go
sys_ssmreq.go
sys_ssmreq_stub.go
sys_stub.go
sys_windows.go
sys_zos.go
zsys_aix_ppc64.go
zsys_darwin.go
zsys_dragonfly.go
zsys_freebsd_386.go
zsys_freebsd_amd64.go
zsys_freebsd_arm.go
zsys_freebsd_arm64.go
zsys_freebsd_riscv64.go
zsys_linux_386.go
zsys_linux_amd64.go
zsys_linux_arm.go
zsys_linux_arm64.go
zsys_linux_loong64.go
zsys_linux_mips.go
zsys_linux_mips64.go
zsys_linux_mips64le.go
zsys_linux_mipsle.go
zsys_linux_ppc.go
zsys_linux_ppc64.go
zsys_linux_ppc64le.go
zsys_linux_riscv64.go
zsys_linux_s390x.go
zsys_netbsd.go
zsys_openbsd.go
zsys_solaris.go
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ipv6
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modules.txt
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Dockerfile
LICENSE
Makefile
README.md
config.yaml
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main.go
70 lines
3.5 KiB
Go
70 lines
3.5 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ipv4
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import (
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"net"
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"syscall"
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"unsafe"
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"golang.org/x/net/internal/iana"
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"golang.org/x/net/internal/socket"
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"golang.org/x/sys/unix"
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)
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const sockoptReceiveInterface = unix.IP_RECVIF
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var (
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ctlOpts = [ctlMax]ctlOpt{
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ctlTTL: {unix.IP_RECVTTL, 1, marshalTTL, parseTTL},
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ctlDst: {unix.IP_RECVDSTADDR, net.IPv4len, marshalDst, parseDst},
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ctlInterface: {unix.IP_RECVIF, syscall.SizeofSockaddrDatalink, marshalInterface, parseInterface},
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ctlPacketInfo: {unix.IP_PKTINFO, sizeofInetPktinfo, marshalPacketInfo, parsePacketInfo},
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}
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sockOpts = map[int]*sockOpt{
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ssoTOS: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_TOS, Len: 4}},
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ssoTTL: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_TTL, Len: 4}},
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ssoMulticastTTL: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_MULTICAST_TTL, Len: 1}},
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ssoMulticastInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_MULTICAST_IF, Len: unix.SizeofIPMreqn}, typ: ssoTypeIPMreqn},
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ssoMulticastLoopback: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_MULTICAST_LOOP, Len: 4}},
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ssoReceiveTTL: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_RECVTTL, Len: 4}},
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ssoReceiveDst: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_RECVDSTADDR, Len: 4}},
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ssoReceiveInterface: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_RECVIF, Len: 4}},
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ssoHeaderPrepend: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_HDRINCL, Len: 4}},
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ssoStripHeader: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_STRIPHDR, Len: 4}},
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ssoJoinGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_JOIN_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
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ssoLeaveGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_LEAVE_GROUP, Len: sizeofGroupReq}, typ: ssoTypeGroupReq},
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ssoJoinSourceGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_JOIN_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
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ssoLeaveSourceGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_LEAVE_SOURCE_GROUP, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
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ssoBlockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_BLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
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ssoUnblockSourceGroup: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.MCAST_UNBLOCK_SOURCE, Len: sizeofGroupSourceReq}, typ: ssoTypeGroupSourceReq},
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ssoPacketInfo: {Option: socket.Option{Level: iana.ProtocolIP, Name: unix.IP_RECVPKTINFO, Len: 4}},
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}
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)
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func (pi *inetPktinfo) setIfindex(i int) {
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pi.Ifindex = uint32(i)
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}
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func (gr *groupReq) setGroup(grp net.IP) {
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sa := (*sockaddrInet)(unsafe.Pointer(uintptr(unsafe.Pointer(gr)) + 4))
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sa.Len = sizeofSockaddrInet
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sa.Family = syscall.AF_INET
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copy(sa.Addr[:], grp)
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}
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func (gsr *groupSourceReq) setSourceGroup(grp, src net.IP) {
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sa := (*sockaddrInet)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 4))
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sa.Len = sizeofSockaddrInet
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sa.Family = syscall.AF_INET
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copy(sa.Addr[:], grp)
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sa = (*sockaddrInet)(unsafe.Pointer(uintptr(unsafe.Pointer(gsr)) + 132))
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sa.Len = sizeofSockaddrInet
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sa.Family = syscall.AF_INET
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copy(sa.Addr[:], src)
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}
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