From 43a123c1ae6613b3efeed291fa552ecd909d3acf Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Tue, 16 Apr 2024 21:23:18 +0200
Subject: Adding upstream version 1.20.14.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/net/sockoptip_posix.go | 49 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 src/net/sockoptip_posix.go

(limited to 'src/net/sockoptip_posix.go')

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)
+}
-- 
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