1 files changed, 187 insertions, 0 deletions
diff --git a/libgo/go/net/sockoptip.go b/libgo/go/net/sockoptip.go
new file mode 100644
index 00000000000..90b6f751e1d
--- /dev/null
+++ b/libgo/go/net/sockoptip.go
@@ -0,0 +1,187 @@
+// Copyright 2011 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.
+
+// +build darwin freebsd linux netbsd openbsd windows
+
+// IP-level socket options
+
+package net
+
+import (
+	"os"
+	"syscall"
+)
+
+func ipv4TOS(fd *netFD) (int, error) {
+	fd.incref()
+	defer fd.decref()
+	v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TOS)
+	if err != nil {
+		return -1, os.NewSyscallError("getsockopt", err)
+	}
+	return v, nil
+}
+
+func setIPv4TOS(fd *netFD, v int) error {
+	fd.incref()
+	defer fd.decref()
+	err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TOS, v)
+	if err != nil {
+		return os.NewSyscallError("setsockopt", err)
+	}
+	return nil
+}
+
+func ipv4TTL(fd *netFD) (int, error) {
+	fd.incref()
+	defer fd.decref()
+	v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TTL)
+	if err != nil {
+		return -1, os.NewSyscallError("getsockopt", err)
+	}
+	return v, nil
+}
+
+func setIPv4TTL(fd *netFD, v int) error {
+	fd.incref()
+	defer fd.decref()
+	err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_TTL, v)
+	if err != nil {
+		return os.NewSyscallError("setsockopt", err)
+	}
+	return nil
+}
+
+func joinIPv4Group(fd *netFD, ifi *Interface, ip IP) error {
+	mreq := &syscall.IPMreq{Multiaddr: [4]byte{ip[0], ip[1], ip[2], ip[3]}}
+	if err := setIPv4MreqToInterface(mreq, ifi); err != nil {
+		return err
+	}
+	fd.incref()
+	defer fd.decref()
+	return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreq(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_ADD_MEMBERSHIP, mreq))
+}
+
+func leaveIPv4Group(fd *netFD, ifi *Interface, ip IP) error {
+	mreq := &syscall.IPMreq{Multiaddr: [4]byte{ip[0], ip[1], ip[2], ip[3]}}
+	if err := setIPv4MreqToInterface(mreq, ifi); err != nil {
+		return err
+	}
+	fd.incref()
+	defer fd.decref()
+	return os.NewSyscallError("setsockopt", syscall.SetsockoptIPMreq(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_DROP_MEMBERSHIP, mreq))
+}
+
+func ipv6HopLimit(fd *netFD) (int, error) {
+	fd.incref()
+	defer fd.decref()
+	v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_UNICAST_HOPS)
+	if err != nil {
+		return -1, os.NewSyscallError("getsockopt", err)
+	}
+	return v, nil
+}
+
+func setIPv6HopLimit(fd *netFD, v int) error {
+	fd.incref()
+	defer fd.decref()
+	err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_UNICAST_HOPS, v)
+	if err != nil {
+		return os.NewSyscallError("setsockopt", err)
+	}
+	return nil
+}
+
+func ipv6MulticastInterface(fd *netFD) (*Interface, error) {
+	fd.incref()
+	defer fd.decref()
+	v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_IF)
+	if err != nil {
+		return nil, os.NewSyscallError("getsockopt", err)
+	}
+	if v == 0 {
+		return nil, nil
+	}
+	ifi, err := InterfaceByIndex(v)
+	if err != nil {
+		return nil, err
+	}
+	return ifi, nil
+}
+
+func setIPv6MulticastInterface(fd *netFD, ifi *Interface) error {
+	var v int
+	if ifi != nil {
+		v = ifi.Index
+	}
+	fd.incref()
+	defer fd.decref()
+	err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_IF, v)
+	if err != nil {
+		return os.NewSyscallError("setsockopt", err)
+	}
+	return nil
+}
+
+func ipv6MulticastHopLimit(fd *netFD) (int, error) {
+	fd.incref()
+	defer fd.decref()
+	v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_HOPS)
+	if err != nil {
+		return -1, os.NewSyscallError("getsockopt", err)
+	}
+	return v, nil
+}
+
+func setIPv6MulticastHopLimit(fd *netFD, v int) error {
+	fd.incref()
+	defer fd.decref()
+	err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_HOPS, v)
+	if err != nil {
+		return os.NewSyscallError("setsockopt", err)
+	}
+	return nil
+}
+
+func ipv6MulticastLoopback(fd *netFD) (bool, error) {
+	fd.incref()
+	defer fd.decref()
+	v, err := syscall.GetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_LOOP)
+	if err != nil {
+		return false, os.NewSyscallError("getsockopt", err)
+	}
+	return v == 1, nil
+}
+
+func setIPv6MulticastLoopback(fd *netFD, v bool) error {
+	fd.incref()
+	defer fd.decref()
+	err := syscall.SetsockoptInt(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_LOOP, boolint(v))
+	if err != nil {
+		return os.NewSyscallError("setsockopt", err)
+	}
+	return nil
+}
+
+func joinIPv6Group(fd *netFD, ifi *Interface, ip IP) error {
+	mreq := &syscall.IPv6Mreq{}
+	copy(mreq.Multiaddr[:], ip)
+	if ifi != nil {
+		mreq.Interface = uint32(ifi.Index)
+	}
+	fd.incref()
+	defer fd.decref()
+	return os.NewSyscallError("setsockopt", syscall.SetsockoptIPv6Mreq(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_JOIN_GROUP, mreq))
+}
+
+func leaveIPv6Group(fd *netFD, ifi *Interface, ip IP) error {
+	mreq := &syscall.IPv6Mreq{}
+	copy(mreq.Multiaddr[:], ip)
+	if ifi != nil {
+		mreq.Interface = uint32(ifi.Index)
+	}
+	fd.incref()
+	defer fd.decref()
+	return os.NewSyscallError("setsockopt", syscall.SetsockoptIPv6Mreq(fd.sysfd, syscall.IPPROTO_IPV6, syscall.IPV6_LEAVE_GROUP, mreq))
+}