syscall: Support socket control messages.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@183745 138bc75d-0d04-0410-961f-82ee72b054a4

2 files changed, 19 insertions, 15 deletions

diff --git a/libgo/go/syscall/sockcmsg_unix.go b/libgo/go/syscall/sockcmsg_unix.go
index d279decb65a..1faac84f4a6 100644
--- a/libgo/go/syscall/sockcmsg_unix.go
+++ b/libgo/go/syscall/sockcmsg_unix.go
@@ -14,7 +14,7 @@ import (
 
 // Round the length of a raw sockaddr up to align it propery.
 func cmsgAlignOf(salen int) int {
-	salign := sizeofPtr
+	salign := int(sizeofPtr)
 	// NOTE: It seems like 64-bit Darwin kernel still requires 32-bit
 	// aligned access to BSD subsystem.
 	if darwinAMD64 {
@@ -39,7 +39,7 @@ func CmsgSpace(datalen int) int {
 }
 
 func cmsgData(cmsg *Cmsghdr) unsafe.Pointer {
-	return unsafe.Pointer(uintptr(unsafe.Pointer(cmsg)) + SizeofCmsghdr)
+	return unsafe.Pointer(uintptr(unsafe.Pointer(cmsg)) + uintptr(SizeofCmsghdr))
 }
 
 type SocketControlMessage struct {
@@ -72,7 +72,7 @@ func ParseSocketControlMessage(buf []byte) ([]SocketControlMessage, error) {
 
 func socketControlMessageHeaderAndData(buf []byte) (*Cmsghdr, []byte, error) {
 	h := (*Cmsghdr)(unsafe.Pointer(&buf[0]))
-	if h.Len < SizeofCmsghdr || int(h.Len) > len(buf) {
+	if int(h.Len) < SizeofCmsghdr || int(h.Len) > len(buf) {
 		return nil, nil, EINVAL
 	}
 	return h, buf[cmsgAlignOf(SizeofCmsghdr):], nil
diff --git a/libgo/go/syscall/socket.go b/libgo/go/syscall/socket.go
index 517b5b9408d..7a2e95ca2a2 100644
--- a/libgo/go/syscall/socket.go
+++ b/libgo/go/syscall/socket.go
@@ -17,12 +17,12 @@ import "unsafe"
 var SocketDisableIPv6 bool
 
 type Sockaddr interface {
-	sockaddr() (ptr *RawSockaddrAny, len Socklen_t, err error)	// lowercase; only we can define Sockaddrs
+	sockaddr() (ptr *RawSockaddrAny, len Socklen_t, err error) // lowercase; only we can define Sockaddrs
 }
 
 type RawSockaddrAny struct {
 	Addr RawSockaddr
-	Pad [12]int8
+	Pad  [12]int8
 }
 
 const SizeofSockaddrAny = 0x1c
@@ -30,7 +30,7 @@ const SizeofSockaddrAny = 0x1c
 type SockaddrInet4 struct {
 	Port int
 	Addr [4]byte
-	raw RawSockaddrInet4
+	raw  RawSockaddrInet4
 }
 
 func (sa *SockaddrInet4) sockaddr() (*RawSockaddrAny, Socklen_t, error) {
@@ -40,7 +40,7 @@ func (sa *SockaddrInet4) sockaddr() (*RawSockaddrAny, Socklen_t, error) {
 	sa.raw.Family = AF_INET
 	n := sa.raw.setLen()
 	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
-	p[0] = byte(sa.Port>>8)
+	p[0] = byte(sa.Port >> 8)
 	p[1] = byte(sa.Port)
 	for i := 0; i < len(sa.Addr); i++ {
 		sa.raw.Addr[i] = sa.Addr[i]
@@ -49,10 +49,10 @@ func (sa *SockaddrInet4) sockaddr() (*RawSockaddrAny, Socklen_t, error) {
 }
 
 type SockaddrInet6 struct {
-	Port int
+	Port   int
 	ZoneId uint32
-	Addr [16]byte
-	raw RawSockaddrInet6
+	Addr   [16]byte
+	raw    RawSockaddrInet6
 }
 
 func (sa *SockaddrInet6) sockaddr() (*RawSockaddrAny, Socklen_t, error) {
@@ -62,7 +62,7 @@ func (sa *SockaddrInet6) sockaddr() (*RawSockaddrAny, Socklen_t, error) {
 	sa.raw.Family = AF_INET6
 	n := sa.raw.setLen()
 	p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port))
-	p[0] = byte(sa.Port>>8)
+	p[0] = byte(sa.Port >> 8)
 	p[1] = byte(sa.Port)
 	sa.raw.Scope_id = sa.ZoneId
 	for i := 0; i < len(sa.Addr); i++ {
@@ -73,7 +73,7 @@ func (sa *SockaddrInet6) sockaddr() (*RawSockaddrAny, Socklen_t, error) {
 
 type SockaddrUnix struct {
 	Name string
-	raw RawSockaddrUnix
+	raw  RawSockaddrUnix
 }
 
 func (sa *SockaddrUnix) sockaddr() (*RawSockaddrAny, Socklen_t, error) {
@@ -268,12 +268,12 @@ func SetsockoptTimeval(fd, level, opt int, tv *Timeval) (err error) {
 }
 
 type Linger struct {
-	Onoff int32;
-	Linger int32;
+	Onoff  int32
+	Linger int32
 }
 
 func SetsockoptLinger(fd, level, opt int, l *Linger) (err error) {
-	return setsockopt(fd, level, opt, (*byte)(unsafe.Pointer(l)), Socklen_t(unsafe.Sizeof(*l)));
+	return setsockopt(fd, level, opt, (*byte)(unsafe.Pointer(l)), Socklen_t(unsafe.Sizeof(*l)))
 }
 
 func SetsockoptIPMreq(fd, level, opt int, mreq *IPMreq) (err error) {
@@ -405,3 +405,7 @@ func (iov *Iovec) SetLen(length int) {
 func (msghdr *Msghdr) SetControllen(length int) {
 	msghdr.Controllen = Msghdr_controllen_t(length)
 }
+
+func (cmsg *Cmsghdr) SetLen(length int) {
+	cmsg.Len = Cmsghdr_len_t(length)
+}