unix: add tcp_md5sig on Linux

This structure is used with setsockopt in BGP speaker implementations.

For more information, please see:
https://criticalindirection.com/2015/05/12/tcp_md5sig/.

Fixes golang/go#24830

Change-Id: Ic2137e843ad502dbe9a4227362b63164789c5877
Reviewed-on: https://go-review.googlesource.com/106656
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

unix/linux/types.go

@@ -67,6 +67,7 @@ package unix
 #include <linux/taskstats.h>
 #include <linux/cgroupstats.h>
 #include <linux/genetlink.h>
+#include <linux/socket.h>
 
 // abi/abi.h generated by mkall.go.
 #include "abi/abi.h"
@@ -956,3 +957,9 @@ const (
 	CBitFieldMaskBit62 = C.BITFIELD_MASK_62
 	CBitFieldMaskBit63 = C.BITFIELD_MASK_63
 )
+
+// TCP-MD5 signature.
+
+type SockaddrStorage C.struct_sockaddr_storage
+
+type TCPMD5Sig C.struct_tcp_md5sig

unix/ztypes_linux_386.go

@@ -1133,3 +1133,18 @@ const (
 	CBitFieldMaskBit62 = 0x4000000000000000
 	CBitFieldMaskBit63 = 0x8000000000000000
 )
+
+type SockaddrStorage struct {
+	Family uint16
+	_      [122]int8
+	_      uint32
+}
+
+type TCPMD5Sig struct {
+	Addr      SockaddrStorage
+	Flags     uint8
+	Prefixlen uint8
+	Keylen    uint16
+	_         uint32
+	Key       [80]uint8
+}

unix/ztypes_linux_amd64.go

@@ -1151,3 +1151,18 @@ const (
 	CBitFieldMaskBit62 = 0x4000000000000000
 	CBitFieldMaskBit63 = 0x8000000000000000
 )
+
+type SockaddrStorage struct {
+	Family uint16
+	_      [118]int8
+	_      uint64
+}
+
+type TCPMD5Sig struct {
+	Addr      SockaddrStorage
+	Flags     uint8
+	Prefixlen uint8
+	Keylen    uint16
+	_         uint32
+	Key       [80]uint8
+}

unix/ztypes_linux_arm.go

@@ -1122,3 +1122,18 @@ const (
 	CBitFieldMaskBit62 = 0x4000000000000000
 	CBitFieldMaskBit63 = 0x8000000000000000
 )
+
+type SockaddrStorage struct {
+	Family uint16
+	_      [122]uint8
+	_      uint32
+}
+
+type TCPMD5Sig struct {
+	Addr      SockaddrStorage
+	Flags     uint8
+	Prefixlen uint8
+	Keylen    uint16
+	_         uint32
+	Key       [80]uint8
+}

unix/ztypes_linux_arm64.go

@@ -1130,3 +1130,18 @@ const (
 	CBitFieldMaskBit62 = 0x4000000000000000
 	CBitFieldMaskBit63 = 0x8000000000000000
 )
+
+type SockaddrStorage struct {
+	Family uint16
+	_      [118]int8
+	_      uint64
+}
+
+type TCPMD5Sig struct {
+	Addr      SockaddrStorage
+	Flags     uint8
+	Prefixlen uint8
+	Keylen    uint16
+	_         uint32
+	Key       [80]uint8
+}

unix/ztypes_linux_mips.go

@@ -1127,3 +1127,18 @@ const (
 	CBitFieldMaskBit62 = 0x2
 	CBitFieldMaskBit63 = 0x1
 )
+
+type SockaddrStorage struct {
+	Family uint16
+	_      [122]int8
+	_      uint32
+}
+
+type TCPMD5Sig struct {
+	Addr      SockaddrStorage
+	Flags     uint8
+	Prefixlen uint8
+	Keylen    uint16
+	_         uint32
+	Key       [80]uint8
+}

unix/ztypes_linux_mips64.go

@@ -1132,3 +1132,18 @@ const (
 	CBitFieldMaskBit62 = 0x2
 	CBitFieldMaskBit63 = 0x1
 )
+
+type SockaddrStorage struct {
+	Family uint16
+	_      [118]int8
+	_      uint64
+}
+
+type TCPMD5Sig struct {
+	Addr      SockaddrStorage
+	Flags     uint8
+	Prefixlen uint8
+	Keylen    uint16
+	_         uint32
+	Key       [80]uint8
+}

unix/ztypes_linux_mips64le.go

@@ -1132,3 +1132,18 @@ const (
 	CBitFieldMaskBit62 = 0x4000000000000000
 	CBitFieldMaskBit63 = 0x8000000000000000
 )
+
+type SockaddrStorage struct {
+	Family uint16
+	_      [118]int8
+	_      uint64
+}
+
+type TCPMD5Sig struct {
+	Addr      SockaddrStorage
+	Flags     uint8
+	Prefixlen uint8
+	Keylen    uint16
+	_         uint32
+	Key       [80]uint8
+}

unix/ztypes_linux_mipsle.go

@@ -1127,3 +1127,18 @@ const (
 	CBitFieldMaskBit62 = 0x4000000000000000
 	CBitFieldMaskBit63 = 0x8000000000000000
 )
+
+type SockaddrStorage struct {
+	Family uint16
+	_      [122]int8
+	_      uint32
+}
+
+type TCPMD5Sig struct {
+	Addr      SockaddrStorage
+	Flags     uint8
+	Prefixlen uint8
+	Keylen    uint16
+	_         uint32
+	Key       [80]uint8
+}

unix/ztypes_linux_ppc64.go

@@ -1140,3 +1140,18 @@ const (
 	CBitFieldMaskBit62 = 0x2
 	CBitFieldMaskBit63 = 0x1
 )
+
+type SockaddrStorage struct {
+	Family uint16
+	_      [118]uint8
+	_      uint64
+}
+
+type TCPMD5Sig struct {
+	Addr      SockaddrStorage
+	Flags     uint8
+	Prefixlen uint8
+	Keylen    uint16
+	_         uint32
+	Key       [80]uint8
+}

unix/ztypes_linux_ppc64le.go

@@ -1140,3 +1140,18 @@ const (
 	CBitFieldMaskBit62 = 0x4000000000000000
 	CBitFieldMaskBit63 = 0x8000000000000000
 )
+
+type SockaddrStorage struct {
+	Family uint16
+	_      [118]uint8
+	_      uint64
+}
+
+type TCPMD5Sig struct {
+	Addr      SockaddrStorage
+	Flags     uint8
+	Prefixlen uint8
+	Keylen    uint16
+	_         uint32
+	Key       [80]uint8
+}

unix/ztypes_linux_s390x.go

@@ -1157,3 +1157,18 @@ const (
 	CBitFieldMaskBit62 = 0x2
 	CBitFieldMaskBit63 = 0x1
 )
+
+type SockaddrStorage struct {
+	Family uint16
+	_      [118]int8
+	_      uint64
+}
+
+type TCPMD5Sig struct {
+	Addr      SockaddrStorage
+	Flags     uint8
+	Prefixlen uint8
+	Keylen    uint16
+	_         uint32
+	Key       [80]uint8
+}