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unix/linux/types.go

@@ -257,6 +257,16 @@ struct my_sockaddr_un {
 #endif
 };
 
+// copied from /usr/include/netiucv/iucv.h modified with explicit signed chars.
+struct sockaddr_iucv {
+	sa_family_t siucv_family;
+	unsigned short siucv_port;
+	unsigned int siucv_addr;
+	signed char siucv_nodeid[8];
+	signed char siucv_user_id[8];
+	signed char siucv_name[8];
+};
+
 #ifdef __ARM_EABI__
 typedef struct user_regs PtraceRegs;
 #elif defined(__aarch64__)

unix/syscall_internal_linux_test.go

@@ -156,6 +156,18 @@ func Test_anyToSockaddr(t *testing.T) {
 				Name: "gopher",
 			},
 		},
+		{
+			name: "AF_IUCV",
+			rsa: sockaddrIUCVToAny(RawSockaddrIUCV{
+				Family:  AF_IUCV,
+				User_id: [8]int8{'*', 'M', 'S', 'G', ' ', ' ', ' ', ' '},
+				Name:    [8]int8{' ', ' ', ' ', ' ', ' ', ' ', ' ', ' '},
+			}),
+			sa: &SockaddrIUCV{
+				UserID: "*MSG    ",
+				Name:   "        ",
+			},
+		},
 		{
 			name: "AF_MAX EAFNOSUPPORT",
 			rsa: &RawSockaddrAny{
@@ -505,3 +517,12 @@ func sockaddrUnixToAny(in RawSockaddrUnix) *RawSockaddrAny {
 
 	return &out
 }
+
+func sockaddrIUCVToAny(in RawSockaddrIUCV) *RawSockaddrAny {
+	var out RawSockaddrAny
+	copy(
+		(*(*[SizeofSockaddrAny]byte)(unsafe.Pointer(&out)))[:],
+		(*(*[SizeofSockaddrUnix]byte)(unsafe.Pointer(&in)))[:],
+	)
+	return &out
+}

unix/syscall_linux.go

@@ -902,8 +902,12 @@ func (sa *SockaddrIUCV) sockaddr() (unsafe.Pointer, _Socklen, error) {
 		sa.raw.User_id[i] = ' '
 		sa.raw.Name[i] = ' '
 	}
-	copy(sa.raw.User_id[:], []byte(sa.UserID))
-	copy(sa.raw.Name[:], []byte(sa.Name))
+	for i, b := range []byte(sa.UserID[:8]) {
+		sa.raw.User_id[i] = int8(b)
+	}
+	for i, b := range []byte(sa.Name[:8]) {
+		sa.raw.Name[i] = int8(b)
+	}
 	return unsafe.Pointer(&sa.raw), SizeofSockaddrIUCV, nil
 }
 
@@ -1087,6 +1091,23 @@ func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
 		}
 
 		return sa, nil
+	case AF_IUCV:
+		pp := (*RawSockaddrIUCV)(unsafe.Pointer(rsa))
+
+		var user [8]byte
+		var name [8]byte
+
+		for i := 0; i < 8; i++ {
+			user[i] = byte(pp.User_id[i])
+			name[i] = byte(pp.Name[i])
+		}
+
+		sa := &SockaddrIUCV{
+			UserID: string(user[:]),
+			Name:   string(name[:]),
+		}
+		return sa, nil
+
 	}
 	return nil, EAFNOSUPPORT
 }

unix/ztypes_linux.go

@@ -311,12 +311,12 @@ type RawSockaddrL2TPIP6 struct {
 }
 
 type RawSockaddrIUCV struct {
-	Family   uint16
-	Port     uint16
-	Addr     uint32
-	Nodeid   [8]byte
-	User_id  [8]byte
-	Name     [8]byte
+	Family  uint16
+	Port    uint16
+	Addr    uint32
+	Nodeid  [8]int8
+	User_id [8]int8
+	Name    [8]int8
 }
 
 type _Socklen uint32