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Diffstat (limited to 'src/net/sockoptip_posix.go')
-rw-r--r--src/net/sockoptip_posix.go49
1 files changed, 49 insertions, 0 deletions
diff --git a/src/net/sockoptip_posix.go b/src/net/sockoptip_posix.go
new file mode 100644
index 0000000..572ea45
--- /dev/null
+++ b/src/net/sockoptip_posix.go
@@ -0,0 +1,49 @@
+// 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.
+
+//go:build unix || windows
+
+package net
+
+import (
+ "runtime"
+ "syscall"
+)
+
+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
+ }
+ err := fd.pfd.SetsockoptIPMreq(syscall.IPPROTO_IP, syscall.IP_ADD_MEMBERSHIP, mreq)
+ runtime.KeepAlive(fd)
+ return wrapSyscallError("setsockopt", err)
+}
+
+func setIPv6MulticastInterface(fd *netFD, ifi *Interface) error {
+ var v int
+ if ifi != nil {
+ v = ifi.Index
+ }
+ err := fd.pfd.SetsockoptInt(syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_IF, v)
+ runtime.KeepAlive(fd)
+ return wrapSyscallError("setsockopt", err)
+}
+
+func setIPv6MulticastLoopback(fd *netFD, v bool) error {
+ err := fd.pfd.SetsockoptInt(syscall.IPPROTO_IPV6, syscall.IPV6_MULTICAST_LOOP, boolint(v))
+ runtime.KeepAlive(fd)
+ return wrapSyscallError("setsockopt", err)
+}
+
+func joinIPv6Group(fd *netFD, ifi *Interface, ip IP) error {
+ mreq := &syscall.IPv6Mreq{}
+ copy(mreq.Multiaddr[:], ip)
+ if ifi != nil {
+ mreq.Interface = uint32(ifi.Index)
+ }
+ err := fd.pfd.SetsockoptIPv6Mreq(syscall.IPPROTO_IPV6, syscall.IPV6_JOIN_GROUP, mreq)
+ runtime.KeepAlive(fd)
+ return wrapSyscallError("setsockopt", err)
+}