syscall: add source-specific multicast socket options for FreeBSD

Update #8266

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/104290043

src/pkg/syscall/mkerrors.sh

@@ -266,7 +266,7 @@ ccflags="$@"
 		$2 ~ /^O[CNPFP][A-Z]+[^_][A-Z]+$/ ||
 		$2 ~ /^IN_/ ||
 		$2 ~ /^LOCK_(SH|EX|NB|UN)$/ ||
-		$2 ~ /^(AF|SOCK|SO|SOL|IPPROTO|IP|IPV6|ICMP6|TCP|EVFILT|NOTE|EV|SHUT|PROT|MAP|PACKET|MSG|SCM|MCL|DT|MADV|PR)_/ ||
+		$2 ~ /^(AF|SOCK|SO|SOL|IPPROTO|IP|IPV6|ICMP6|TCP|EVFILT|NOTE|EV|SHUT|PROT|MAP|PACKET|MSG|SCM|MCL|DT|MADV|PR|MCAST)_/ ||
 		$2 == "ICMPV6_FILTER" ||
 		$2 == "SOMAXCONN" ||
 		$2 == "NAME_MAX" ||

src/pkg/syscall/syscall_freebsd.go

@@ -93,14 +93,36 @@ func Pipe(p []int) (err error) {
 }
 
 func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) {
-	var value IPMreqn
-	vallen := _Socklen(SizeofIPMreqn)
-	errno := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
-	return &value, errno
+	var v IPMreqn
+	l := _Socklen(SizeofIPMreqn)
+	err := getsockopt(fd, level, opt, unsafe.Pointer(&v), &l)
+	return &v, err
 }
 
-func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) {
-	return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq))
+func GetsockoptGroupReq(fd, level, opt int) (*GroupReq, error) {
+	var v GroupReq
+	l := _Socklen(SizeofGroupReq)
+	err := getsockopt(fd, level, opt, unsafe.Pointer(&v), &l)
+	return &v, err
+}
+
+func GetsockoptGroupSourceReq(fd, level, opt int) (*GroupSourceReq, error) {
+	var v GroupSourceReq
+	l := _Socklen(SizeofGroupSourceReq)
+	err := getsockopt(fd, level, opt, unsafe.Pointer(&v), &l)
+	return &v, err
+}
+
+func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) error {
+	return setsockopt(fd, level, opt, unsafe.Pointer(mreq), SizeofIPMreqn)
+}
+
+func SetsockoptGroupReq(fd, level, opt int, greq *GroupReq) error {
+	return setsockopt(fd, level, opt, unsafe.Pointer(greq), SizeofGroupReq)
+}
+
+func SetsockoptGroupSourceReq(fd, level, opt int, gsreq *GroupSourceReq) error {
+	return setsockopt(fd, level, opt, unsafe.Pointer(gsreq), SizeofGroupSourceReq)
 }
 
 func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) {

src/pkg/syscall/types_freebsd.go

@@ -224,6 +224,8 @@ type RawSockaddr C.struct_sockaddr
 
 type RawSockaddrAny C.struct_sockaddr_any
 
+type RawSockaddrStorage C.struct_sockaddr_storage
+
 type _Socklen C.socklen_t
 
 type Linger C.struct_linger
@@ -236,6 +238,10 @@ type IPMreqn C.struct_ip_mreqn
 
 type IPv6Mreq C.struct_ipv6_mreq
 
+type GroupReq C.struct_group_req
+
+type GroupSourceReq C.struct_group_source_req
+
 type Msghdr C.struct_msghdr
 
 type Cmsghdr C.struct_cmsghdr
@@ -252,10 +258,13 @@ const (
 	SizeofSockaddrAny      = C.sizeof_struct_sockaddr_any
 	SizeofSockaddrUnix     = C.sizeof_struct_sockaddr_un
 	SizeofSockaddrDatalink = C.sizeof_struct_sockaddr_dl
+	SizeofSockaddrStorage  = C.sizeof_struct_sockaddr_storage
 	SizeofLinger           = C.sizeof_struct_linger
 	SizeofIPMreq           = C.sizeof_struct_ip_mreq
 	SizeofIPMreqn          = C.sizeof_struct_ip_mreqn
 	SizeofIPv6Mreq         = C.sizeof_struct_ipv6_mreq
+	SizeofGroupReq         = C.sizeof_struct_group_req
+	SizeofGroupSourceReq   = C.sizeof_struct_group_source_req
 	SizeofMsghdr           = C.sizeof_struct_msghdr
 	SizeofCmsghdr          = C.sizeof_struct_cmsghdr
 	SizeofInet6Pktinfo     = C.sizeof_struct_in6_pktinfo

src/pkg/syscall/zerrors_freebsd_386.go

@@ -1022,6 +1022,15 @@ const (
 	MAP_RESERVED0100                  = 0x100
 	MAP_SHARED                        = 0x1
 	MAP_STACK                         = 0x400
+	MCAST_BLOCK_SOURCE                = 0x54
+	MCAST_EXCLUDE                     = 0x2
+	MCAST_INCLUDE                     = 0x1
+	MCAST_JOIN_GROUP                  = 0x50
+	MCAST_JOIN_SOURCE_GROUP           = 0x52
+	MCAST_LEAVE_GROUP                 = 0x51
+	MCAST_LEAVE_SOURCE_GROUP          = 0x53
+	MCAST_UNBLOCK_SOURCE              = 0x55
+	MCAST_UNDEFINED                   = 0x0
 	MCL_CURRENT                       = 0x1
 	MCL_FUTURE                        = 0x2
 	MSG_CMSG_CLOEXEC                  = 0x40000

src/pkg/syscall/zerrors_freebsd_amd64.go

@@ -1023,6 +1023,15 @@ const (
 	MAP_RESERVED0100                  = 0x100
 	MAP_SHARED                        = 0x1
 	MAP_STACK                         = 0x400
+	MCAST_BLOCK_SOURCE                = 0x54
+	MCAST_EXCLUDE                     = 0x2
+	MCAST_INCLUDE                     = 0x1
+	MCAST_JOIN_GROUP                  = 0x50
+	MCAST_JOIN_SOURCE_GROUP           = 0x52
+	MCAST_LEAVE_GROUP                 = 0x51
+	MCAST_LEAVE_SOURCE_GROUP          = 0x53
+	MCAST_UNBLOCK_SOURCE              = 0x55
+	MCAST_UNDEFINED                   = 0x0
 	MCL_CURRENT                       = 0x1
 	MCL_FUTURE                        = 0x2
 	MSG_CMSG_CLOEXEC                  = 0x40000

src/pkg/syscall/zerrors_freebsd_arm.go

@@ -1022,6 +1022,15 @@ const (
 	MAP_RESERVED0100                  = 0x100
 	MAP_SHARED                        = 0x1
 	MAP_STACK                         = 0x400
+	MCAST_BLOCK_SOURCE                = 0x54
+	MCAST_EXCLUDE                     = 0x2
+	MCAST_INCLUDE                     = 0x1
+	MCAST_JOIN_GROUP                  = 0x50
+	MCAST_JOIN_SOURCE_GROUP           = 0x52
+	MCAST_LEAVE_GROUP                 = 0x51
+	MCAST_LEAVE_SOURCE_GROUP          = 0x53
+	MCAST_UNBLOCK_SOURCE              = 0x55
+	MCAST_UNDEFINED                   = 0x0
 	MCL_CURRENT                       = 0x1
 	MCL_FUTURE                        = 0x2
 	MSG_CMSG_CLOEXEC                  = 0x40000

src/pkg/syscall/ztypes_freebsd_386.go

@@ -183,6 +183,14 @@ type RawSockaddrAny struct {
 	Pad  [92]int8
 }
 
+type RawSockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
 type _Socklen uint32
 
 type Linger struct {
@@ -211,6 +219,17 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type GroupReq struct {
+	Interface uint32
+	Group     RawSockaddrStorage
+}
+
+type GroupSourceReq struct {
+	Interface uint32
+	Group     RawSockaddrStorage
+	Source    RawSockaddrStorage
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -247,10 +266,13 @@ const (
 	SizeofSockaddrAny      = 0x6c
 	SizeofSockaddrUnix     = 0x6a
 	SizeofSockaddrDatalink = 0x36
+	SizeofSockaddrStorage  = 0x80
 	SizeofLinger           = 0x8
 	SizeofIPMreq           = 0x8
 	SizeofIPMreqn          = 0xc
 	SizeofIPv6Mreq         = 0x14
+	SizeofGroupReq         = 0x84
+	SizeofGroupSourceReq   = 0x104
 	SizeofMsghdr           = 0x1c
 	SizeofCmsghdr          = 0xc
 	SizeofInet6Pktinfo     = 0x14

src/pkg/syscall/ztypes_freebsd_amd64.go

@@ -183,6 +183,14 @@ type RawSockaddrAny struct {
 	Pad  [92]int8
 }
 
+type RawSockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
 type _Socklen uint32
 
 type Linger struct {
@@ -211,6 +219,19 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type GroupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     RawSockaddrStorage
+}
+
+type GroupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     RawSockaddrStorage
+	Source    RawSockaddrStorage
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -249,10 +270,13 @@ const (
 	SizeofSockaddrAny      = 0x6c
 	SizeofSockaddrUnix     = 0x6a
 	SizeofSockaddrDatalink = 0x36
+	SizeofSockaddrStorage  = 0x80
 	SizeofLinger           = 0x8
 	SizeofIPMreq           = 0x8
 	SizeofIPMreqn          = 0xc
 	SizeofIPv6Mreq         = 0x14
+	SizeofGroupReq         = 0x88
+	SizeofGroupSourceReq   = 0x108
 	SizeofMsghdr           = 0x30
 	SizeofCmsghdr          = 0xc
 	SizeofInet6Pktinfo     = 0x14

src/pkg/syscall/ztypes_freebsd_arm.go

@@ -185,6 +185,14 @@ type RawSockaddrAny struct {
 	Pad  [92]int8
 }
 
+type RawSockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
 type _Socklen uint32
 
 type Linger struct {
@@ -213,6 +221,19 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type GroupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     RawSockaddrStorage
+}
+
+type GroupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     RawSockaddrStorage
+	Source    RawSockaddrStorage
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -249,10 +270,13 @@ const (
 	SizeofSockaddrAny      = 0x6c
 	SizeofSockaddrUnix     = 0x6a
 	SizeofSockaddrDatalink = 0x36
+	SizeofSockaddrStorage  = 0x80
 	SizeofLinger           = 0x8
 	SizeofIPMreq           = 0x8
 	SizeofIPMreqn          = 0xc
 	SizeofIPv6Mreq         = 0x14
+	SizeofGroupReq         = 0x88
+	SizeofGroupSourceReq   = 0x108
 	SizeofMsghdr           = 0x1c
 	SizeofCmsghdr          = 0xc
 	SizeofInet6Pktinfo     = 0x14