unix: add PacketMreq on Linux

The packet_mreq structure is used on Linux to modify the behavior
of packet sockets using setsockopt.  See 'man 7 packet' for more
details.

Change-Id: I34e5b99a6b6eb1f23d49a9c9f25ce7b77121c8f0
Reviewed-on: https://go-review.googlesource.com/51710
Run-TryBot: Matt Layher <mdlayher@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

unix/linux/types.go

@@ -316,6 +316,8 @@ type IPMreqn C.struct_ip_mreqn
 
 type IPv6Mreq C.struct_ipv6_mreq
 
+type PacketMreq C.struct_packet_mreq
+
 type Msghdr C.struct_msghdr
 
 type Cmsghdr C.struct_cmsghdr
@@ -348,6 +350,7 @@ const (
 	SizeofIPMreq            = C.sizeof_struct_ip_mreq
 	SizeofIPMreqn           = C.sizeof_struct_ip_mreqn
 	SizeofIPv6Mreq          = C.sizeof_struct_ipv6_mreq
+	SizeofPacketMreq        = C.sizeof_struct_packet_mreq
 	SizeofMsghdr            = C.sizeof_struct_msghdr
 	SizeofCmsghdr           = C.sizeof_struct_cmsghdr
 	SizeofInet4Pktinfo      = C.sizeof_struct_in_pktinfo

unix/ztypes_linux_386.go

@@ -285,6 +285,13 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type PacketMreq struct {
+	Ifindex int32
+	Type    uint16
+	Alen    uint16
+	Address [8]uint8
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -377,6 +384,7 @@ const (
 	SizeofIPMreq            = 0x8
 	SizeofIPMreqn           = 0xc
 	SizeofIPv6Mreq          = 0x14
+	SizeofPacketMreq        = 0x10
 	SizeofMsghdr            = 0x1c
 	SizeofCmsghdr           = 0xc
 	SizeofInet4Pktinfo      = 0xc

unix/ztypes_linux_amd64.go

@@ -287,6 +287,13 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type PacketMreq struct {
+	Ifindex int32
+	Type    uint16
+	Alen    uint16
+	Address [8]uint8
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -381,6 +388,7 @@ const (
 	SizeofIPMreq            = 0x8
 	SizeofIPMreqn           = 0xc
 	SizeofIPv6Mreq          = 0x14
+	SizeofPacketMreq        = 0x10
 	SizeofMsghdr            = 0x38
 	SizeofCmsghdr           = 0x10
 	SizeofInet4Pktinfo      = 0xc

unix/ztypes_linux_arm.go

@@ -289,6 +289,13 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type PacketMreq struct {
+	Ifindex int32
+	Type    uint16
+	Alen    uint16
+	Address [8]uint8
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -381,6 +388,7 @@ const (
 	SizeofIPMreq            = 0x8
 	SizeofIPMreqn           = 0xc
 	SizeofIPv6Mreq          = 0x14
+	SizeofPacketMreq        = 0x10
 	SizeofMsghdr            = 0x1c
 	SizeofCmsghdr           = 0xc
 	SizeofInet4Pktinfo      = 0xc

unix/ztypes_linux_arm64.go

@@ -288,6 +288,13 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type PacketMreq struct {
+	Ifindex int32
+	Type    uint16
+	Alen    uint16
+	Address [8]uint8
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -382,6 +389,7 @@ const (
 	SizeofIPMreq            = 0x8
 	SizeofIPMreqn           = 0xc
 	SizeofIPv6Mreq          = 0x14
+	SizeofPacketMreq        = 0x10
 	SizeofMsghdr            = 0x38
 	SizeofCmsghdr           = 0x10
 	SizeofInet4Pktinfo      = 0xc

unix/ztypes_linux_mips.go

@@ -288,6 +288,13 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type PacketMreq struct {
+	Ifindex int32
+	Type    uint16
+	Alen    uint16
+	Address [8]uint8
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -380,6 +387,7 @@ const (
 	SizeofIPMreq            = 0x8
 	SizeofIPMreqn           = 0xc
 	SizeofIPv6Mreq          = 0x14
+	SizeofPacketMreq        = 0x10
 	SizeofMsghdr            = 0x1c
 	SizeofCmsghdr           = 0xc
 	SizeofInet4Pktinfo      = 0xc

unix/ztypes_linux_mips64.go

@@ -288,6 +288,13 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type PacketMreq struct {
+	Ifindex int32
+	Type    uint16
+	Alen    uint16
+	Address [8]uint8
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -382,6 +389,7 @@ const (
 	SizeofIPMreq            = 0x8
 	SizeofIPMreqn           = 0xc
 	SizeofIPv6Mreq          = 0x14
+	SizeofPacketMreq        = 0x10
 	SizeofMsghdr            = 0x38
 	SizeofCmsghdr           = 0x10
 	SizeofInet4Pktinfo      = 0xc

unix/ztypes_linux_mips64le.go

@@ -288,6 +288,13 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type PacketMreq struct {
+	Ifindex int32
+	Type    uint16
+	Alen    uint16
+	Address [8]uint8
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -382,6 +389,7 @@ const (
 	SizeofIPMreq            = 0x8
 	SizeofIPMreqn           = 0xc
 	SizeofIPv6Mreq          = 0x14
+	SizeofPacketMreq        = 0x10
 	SizeofMsghdr            = 0x38
 	SizeofCmsghdr           = 0x10
 	SizeofInet4Pktinfo      = 0xc

unix/ztypes_linux_mipsle.go

@@ -288,6 +288,13 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type PacketMreq struct {
+	Ifindex int32
+	Type    uint16
+	Alen    uint16
+	Address [8]uint8
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -380,6 +387,7 @@ const (
 	SizeofIPMreq            = 0x8
 	SizeofIPMreqn           = 0xc
 	SizeofIPv6Mreq          = 0x14
+	SizeofPacketMreq        = 0x10
 	SizeofMsghdr            = 0x1c
 	SizeofCmsghdr           = 0xc
 	SizeofInet4Pktinfo      = 0xc

unix/ztypes_linux_ppc64.go

@@ -289,6 +289,13 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type PacketMreq struct {
+	Ifindex int32
+	Type    uint16
+	Alen    uint16
+	Address [8]uint8
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -383,6 +390,7 @@ const (
 	SizeofIPMreq            = 0x8
 	SizeofIPMreqn           = 0xc
 	SizeofIPv6Mreq          = 0x14
+	SizeofPacketMreq        = 0x10
 	SizeofMsghdr            = 0x38
 	SizeofCmsghdr           = 0x10
 	SizeofInet4Pktinfo      = 0xc

unix/ztypes_linux_ppc64le.go

@@ -289,6 +289,13 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type PacketMreq struct {
+	Ifindex int32
+	Type    uint16
+	Alen    uint16
+	Address [8]uint8
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -383,6 +390,7 @@ const (
 	SizeofIPMreq            = 0x8
 	SizeofIPMreqn           = 0xc
 	SizeofIPv6Mreq          = 0x14
+	SizeofPacketMreq        = 0x10
 	SizeofMsghdr            = 0x38
 	SizeofCmsghdr           = 0x10
 	SizeofInet4Pktinfo      = 0xc

unix/ztypes_linux_s390x.go

@@ -288,6 +288,13 @@ type IPv6Mreq struct {
 	Interface uint32
 }
 
+type PacketMreq struct {
+	Ifindex int32
+	Type    uint16
+	Alen    uint16
+	Address [8]uint8
+}
+
 type Msghdr struct {
 	Name       *byte
 	Namelen    uint32
@@ -382,6 +389,7 @@ const (
 	SizeofIPMreq            = 0x8
 	SizeofIPMreqn           = 0xc
 	SizeofIPv6Mreq          = 0x14
+	SizeofPacketMreq        = 0x10
 	SizeofMsghdr            = 0x38
 	SizeofCmsghdr           = 0x10
 	SizeofInet4Pktinfo      = 0xc