syscall: add source-specific multicast socket options for Darwin

Update #8266

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/101460043

src/pkg/syscall/types_darwin.go

@@ -142,6 +142,8 @@ 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
@@ -152,6 +154,10 @@ type IPMreq C.struct_ip_mreq
 
 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
@@ -168,11 +174,14 @@ const (
 	SizeofSockaddrInet4    = C.sizeof_struct_sockaddr_in
 	SizeofSockaddrInet6    = C.sizeof_struct_sockaddr_in6
 	SizeofSockaddrAny      = C.sizeof_struct_sockaddr_any
+	SizeofSockaddrStorage  = C.sizeof_struct_sockaddr_storage
 	SizeofSockaddrUnix     = C.sizeof_struct_sockaddr_un
 	SizeofSockaddrDatalink = C.sizeof_struct_sockaddr_dl
 	SizeofLinger           = C.sizeof_struct_linger
 	SizeofIPMreq           = C.sizeof_struct_ip_mreq
 	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
 	SizeofInet4Pktinfo     = C.sizeof_struct_in_pktinfo

src/pkg/syscall/zerrors_darwin_386.go

@@ -785,6 +785,15 @@ const (
 	MAP_RENAME                        = 0x20
 	MAP_RESERVED0080                  = 0x80
 	MAP_SHARED                        = 0x1
+	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_CTRUNC                        = 0x20

src/pkg/syscall/zerrors_darwin_amd64.go

@@ -785,6 +785,15 @@ const (
 	MAP_RENAME                        = 0x20
 	MAP_RESERVED0080                  = 0x80
 	MAP_SHARED                        = 0x1
+	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_CTRUNC                        = 0x20

src/pkg/syscall/ztypes_darwin_386.go

@@ -188,6 +188,14 @@ 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 {
@@ -210,6 +218,17 @@ 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
@@ -250,11 +269,14 @@ const (
 	SizeofSockaddrInet4    = 0x10
 	SizeofSockaddrInet6    = 0x1c
 	SizeofSockaddrAny      = 0x6c
+	SizeofSockaddrStorage  = 0x80
 	SizeofSockaddrUnix     = 0x6a
 	SizeofSockaddrDatalink = 0x14
 	SizeofLinger           = 0x8
 	SizeofIPMreq           = 0x8
 	SizeofIPv6Mreq         = 0x14
+	SizeofGroupReq         = 0x84
+	SizeofGroupSourceReq   = 0x104
 	SizeofMsghdr           = 0x1c
 	SizeofCmsghdr          = 0xc
 	SizeofInet4Pktinfo     = 0xc

src/pkg/syscall/ztypes_darwin_amd64.go

@@ -194,6 +194,14 @@ 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 {
@@ -216,6 +224,17 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type GroupReq struct {
+	Interface uint32
+	Pad_cgo_0 [128]byte
+}
+
+type GroupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [128]byte
+	Pad_cgo_1 [128]byte
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -258,11 +277,14 @@ const (
 	SizeofSockaddrInet4    = 0x10
 	SizeofSockaddrInet6    = 0x1c
 	SizeofSockaddrAny      = 0x6c
+	SizeofSockaddrStorage  = 0x80
 	SizeofSockaddrUnix     = 0x6a
 	SizeofSockaddrDatalink = 0x14
 	SizeofLinger           = 0x8
 	SizeofIPMreq           = 0x8
 	SizeofIPv6Mreq         = 0x14
+	SizeofGroupReq         = 0x84
+	SizeofGroupSourceReq   = 0x104
 	SizeofMsghdr           = 0x30
 	SizeofCmsghdr          = 0xc
 	SizeofInet4Pktinfo     = 0xc