From 5eb6be6d1d3567d4af2b56a213535b5c2e6b7309 Mon Sep 17 00:00:00 2001
From: Christian Svensson <blue@cmd.nu>
Date: Sun, 16 Aug 2020 20:36:03 +0200
Subject: [PATCH] AF_IUCV work

---
 unix/linux/types.go   |  3 +++
 unix/syscall_linux.go | 19 +++++++++++++++++++
 unix/ztypes_linux.go  | 10 ++++++++++
 3 files changed, 32 insertions(+)

diff --git a/unix/linux/types.go b/unix/linux/types.go
index 31a20c7b..419ed247 100644
--- a/unix/linux/types.go
+++ b/unix/linux/types.go
@@ -540,6 +540,8 @@ type RawSockaddrL2TPIP C.struct_sockaddr_l2tpip
 
 type RawSockaddrL2TPIP6 C.struct_sockaddr_l2tpip6
 
+type RawSockaddrIUCV C.struct_sockaddr_iucv
+
 type RawSockaddr C.struct_sockaddr
 
 type RawSockaddrAny C.struct_sockaddr_any
@@ -594,6 +596,7 @@ const (
 	SizeofSockaddrTIPC      = C.sizeof_struct_sockaddr_tipc
 	SizeofSockaddrL2TPIP    = C.sizeof_struct_sockaddr_l2tpip
 	SizeofSockaddrL2TPIP6   = C.sizeof_struct_sockaddr_l2tpip6
+	SizeofSockaddrIUCV      = C.sizeof_struct_sockaddr_iucv
 	SizeofLinger            = C.sizeof_struct_linger
 	SizeofIovec             = C.sizeof_struct_iovec
 	SizeofIPMreq            = C.sizeof_struct_ip_mreq
diff --git a/unix/syscall_linux.go b/unix/syscall_linux.go
index 027bcafd..f66c515b 100644
--- a/unix/syscall_linux.go
+++ b/unix/syscall_linux.go
@@ -885,6 +885,25 @@ func (sa *SockaddrL2TPIP6) sockaddr() (unsafe.Pointer, _Socklen, error) {
 	return unsafe.Pointer(&sa.raw), SizeofSockaddrL2TPIP6, nil
 }
 
+// SockaddrIUCV implements the Sockaddr interface for AF_IUCV sockets.
+type SockaddrIUCV struct {
+	UserID string
+	Name   string
+	raw    RawSockaddrIUCV
+}
+
+func (sa *SockaddrIUCV) sockaddr() (unsafe.Pointer, _Socklen, error) {
+	sa.raw.Family = AF_IUCV
+	for i := 0; i < 8; i++ {
+		sa.raw.Nodeid[i] = ' '
+		sa.raw.User_id[i] = ' '
+		sa.raw.Name[i] = ' '
+	}
+	copy(sa.raw.User_id[:], []byte(sa.UserID))
+	copy(sa.raw.Name[:], []byte(sa.Name))
+	return unsafe.Pointer(&sa.raw), SizeofSockaddrIUCV, nil
+}
+
 func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
 	switch rsa.Addr.Family {
 	case AF_NETLINK:
diff --git a/unix/ztypes_linux.go b/unix/ztypes_linux.go
index 83364d75..801f042d 100644
--- a/unix/ztypes_linux.go
+++ b/unix/ztypes_linux.go
@@ -310,6 +310,15 @@ type RawSockaddrL2TPIP6 struct {
 	Conn_id  uint32
 }
 
+type RawSockaddrIUCV struct {
+	Family   uint16
+	Port     uint16
+	Addr     uint32
+	Nodeid   [8]byte
+	User_id  [8]byte
+	Name     [8]byte
+}
+
 type _Socklen uint32
 
 type Linger struct {
@@ -422,6 +431,7 @@ const (
 	SizeofSockaddrTIPC      = 0x10
 	SizeofSockaddrL2TPIP    = 0x10
 	SizeofSockaddrL2TPIP6   = 0x20
+	SizeofSockaddrIUCV      = 0x20
 	SizeofLinger            = 0x8
 	SizeofIPMreq            = 0x8
 	SizeofIPMreqn           = 0xc