syscall, net: clean up socket stub for solaris

Solaris doesn't have struct ip_mreqn, instead it uses struct ip_mreq
and struct group_req with struct sockaddr_storage.

Also fixes incorrect SockaddrDatalink.

Update #7399

LGTM=aram, iant
R=golang-codereviews, aram, gobot, iant
CC=golang-codereviews
https://golang.org/cl/73920043

src/pkg/net/sockoptip_bsd.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd nacl netbsd openbsd solaris
+// +build darwin dragonfly freebsd nacl netbsd openbsd
 
 package net
 

src/pkg/net/sockoptip_posix.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd linux nacl netbsd openbsd solaris windows
+// +build darwin dragonfly freebsd linux nacl netbsd openbsd windows
 
 package net
 

src/pkg/net/sockoptip_stub.go

@@ -0,0 +1,39 @@
+// 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 solaris
+
+package net
+
+import "syscall"
+
+func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
+	// See golang.org/issue/7399.
+	return syscall.EINVAL
+}
+
+func setIPv4MulticastLoopback(fd *netFD, v bool) error {
+	// See golang.org/issue/7399.
+	return syscall.EINVAL
+}
+
+func joinIPv4Group(fd *netFD, ifi *Interface, ip IP) error {
+	// See golang.org/issue/7399.
+	return syscall.EINVAL
+}
+
+func setIPv6MulticastInterface(fd *netFD, ifi *Interface) error {
+	// See golang.org/issue/7399.
+	return syscall.EINVAL
+}
+
+func setIPv6MulticastLoopback(fd *netFD, v bool) error {
+	// See golang.org/issue/7399.
+	return syscall.EINVAL
+}
+
+func joinIPv6Group(fd *netFD, ifi *Interface, ip IP) error {
+	// See golang.org/issue/7399.
+	return syscall.EINVAL
+}

src/pkg/syscall/syscall_solaris.go

@@ -15,14 +15,13 @@ package syscall
 import "unsafe"
 
 type SockaddrDatalink struct {
-	Len    uint8
-	Family uint8
+	Family uint16
 	Index  uint16
 	Type   uint8
 	Nlen   uint8
 	Alen   uint8
 	Slen   uint8
-	Data   [46]int8
+	Data   [244]int8
 	raw    RawSockaddrDatalink
 }
 
@@ -77,12 +76,6 @@ func Pipe(p []int) (err error) {
 	return
 }
 
-type IPMreqn struct {
-	Multiaddr [4]byte /* in_addr */
-	Address   [4]byte /* in_addr */
-	Ifindex   int32
-}
-
 func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) {
 	if sa.Port < 0 || sa.Port > 0xFFFF {
 		return nil, 0, EINVAL
@@ -145,21 +138,6 @@ func Getsockname(fd int) (sa Sockaddr, err error) {
 	return anyToSockaddr(&rsa)
 }
 
-func GetsockoptInet4Addr(fd, level, opt int) (value [4]byte, err error) {
-	vallen := _Socklen(4)
-	err = getsockopt(fd, level, opt, unsafe.Pointer(&value[0]), &vallen)
-	return value, err
-}
-
-func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) {
-	// TODO(dfc)
-	return nil, EINVAL
-}
-
-func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) {
-	return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq))
-}
-
 // The const provides a compile-time constant so clients
 // can adjust to whether there is a working Getwd and avoid
 // even linking this function into the binary.  See ../os/getwd.go.