net: ipv6 support, merge unix+ip;[pack:x] attribute (#9904)

examples/net_raw_http.v

@@ -7,6 +7,10 @@ fn main() {
 	defer {
 		conn.close() or {}
 	}
+
+	println(' peer: $conn.peer_addr()')
+	println('local: $conn.addr()')
+
 	// Simple http HEAD request for a file
 	conn.write_string('HEAD /index.html HTTP/1.0\r\n\r\n') ?
 	// Read all the data that is waiting

examples/net_resolve.v

@@ -0,0 +1,24 @@
+import net
+
+for addr in [
+	'vlang.io:80',
+	'google.com:80',
+	'steampowered.com:80',
+	'api.steampowered.com:80',
+] {
+	println('$addr')
+
+	for @type in [net.SocketType.tcp, .udp] {
+		family := net.AddrFamily.unspec
+
+		addrs := net.resolve_addrs(addr, family, @type) or {
+			println('> None')
+			continue
+		}
+
+		for a in addrs {
+			f := a.family()
+			println('> $a $f ${@type}')
+		}
+	}
+}

examples/net_udp_server_and_client.v

@@ -12,7 +12,7 @@ fn main() {
 	mut buf := []byte{len: 100}
 	if is_server {
 		println('UDP echo server, listening for udp packets on port: $port')
-		mut c := net.listen_udp(port) ?
+		mut c := net.listen_udp(':$port') ?
 		for {
 			read, addr := c.read(mut buf) or { continue }
 			println('received $read bytes from $addr')
@@ -23,7 +23,7 @@ fn main() {
 		}
 	} else {
 		println('UDP client, sending packets to port: ${port}.\nType `exit` to exit.')
-		mut c := net.dial_udp('localhost', 'localhost:$port') ?
+		mut c := net.dial_udp('localhost:$port') ?
 		for {
 			mut line := os.input('client > ')
 			match line {

examples/tcp_echo_server.v

@@ -0,0 +1,40 @@
+import io
+import net
+
+// This file shows how a basic TCP echo server can be implemented using
+// the net module. You can connect to the server by using netcat or telnet,
+// in separate shells, for example:
+// nc 127.0.0.1 12345
+// or
+// telnet 127.0.0.1 12345
+
+fn main() {
+	mut server := net.listen_tcp(.ip6, ':12345') ?
+	laddr := server.addr() ?
+	eprintln('Listen on $laddr ...')
+	for {
+		mut socket := server.accept() ?
+		go handle_client(mut socket)
+	}
+}
+
+fn handle_client(mut socket net.TcpConn) {
+	defer {
+		socket.close() or { panic(err) }
+	}
+	client_addr := socket.peer_addr() or { return }
+	eprintln('> new client: $client_addr')
+	mut reader := io.new_buffered_reader(reader: socket)
+	defer {
+		reader.free()
+	}
+	socket.write_string('server: hello\n') or { return }
+	for {
+		received_line := reader.read_line() or { return }
+		if received_line == '' {
+			return
+		}
+		println('client $client_addr: $received_line')
+		socket.write_string('server: $received_line\n') or { return }
+	}
+}

examples/websocket/client-server/server.v

@@ -10,7 +10,7 @@ fn main() {
 }
 
 fn start_server() ? {
-	mut s := websocket.new_server(30000, '')
+	mut s := websocket.new_server(.ip6, 30000, '')
 	// Make that in execution test time give time to execute at least one time
 	s.ping_interval = 100
 	s.on_connect(fn (mut s websocket.ServerClient) ?bool {

examples/websocket/ping.v

@@ -13,7 +13,7 @@ fn main() {
 }
 
 fn start_server() ? {
-	mut s := websocket.new_server(30000, '')
+	mut s := websocket.new_server(.ip6, 30000, '')
 	// Make that in execution test time give time to execute at least one time
 	s.ping_interval = 100
 	s.on_connect(fn (mut s websocket.ServerClient) ?bool {