1 files changed, 153 insertions, 0 deletions
diff --git a/src/pkg/net/dial.go b/src/pkg/net/dial.go
new file mode 100644
index 000000000..10c67dcc4
--- /dev/null
+++ b/src/pkg/net/dial.go
@@ -0,0 +1,153 @@
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package net
+
+import "os"
+
+func resolveNetAddr(op, net, addr string) (a Addr, err os.Error) {
+	if addr == "" {
+		return nil, &OpError{op, net, nil, errMissingAddress}
+	}
+	switch net {
+	case "tcp", "tcp4", "tcp6":
+		a, err = ResolveTCPAddr(net, addr)
+	case "udp", "udp4", "udp6":
+		a, err = ResolveUDPAddr(net, addr)
+	case "unix", "unixgram", "unixpacket":
+		a, err = ResolveUnixAddr(net, addr)
+	case "ip", "ip4", "ip6":
+		a, err = ResolveIPAddr(net, addr)
+	default:
+		err = UnknownNetworkError(net)
+	}
+	if err != nil {
+		return nil, &OpError{op, net + " " + addr, nil, err}
+	}
+	return
+}
+
+// Dial connects to the address addr on the network net.
+//
+// Known networks are "tcp", "tcp4" (IPv4-only), "tcp6" (IPv6-only),
+// "udp", "udp4" (IPv4-only), "udp6" (IPv6-only), "ip", "ip4"
+// (IPv4-only), "ip6" (IPv6-only), "unix" and "unixgram".
+//
+// For IP networks, addresses have the form host:port.  If host is
+// a literal IPv6 address, it must be enclosed in square brackets.
+// The functions JoinHostPort and SplitHostPort manipulate 
+// addresses in this form.
+//
+// Examples:
+//	Dial("tcp", "12.34.56.78:80")
+//	Dial("tcp", "google.com:80")
+//	Dial("tcp", "[de:ad:be:ef::ca:fe]:80")
+//
+func Dial(net, addr string) (c Conn, err os.Error) {
+	addri, err := resolveNetAddr("dial", net, addr)
+	if err != nil {
+		return nil, err
+	}
+	switch ra := addri.(type) {
+	case *TCPAddr:
+		c, err = DialTCP(net, nil, ra)
+	case *UDPAddr:
+		c, err = DialUDP(net, nil, ra)
+	case *UnixAddr:
+		c, err = DialUnix(net, nil, ra)
+	case *IPAddr:
+		c, err = DialIP(net, nil, ra)
+	default:
+		err = UnknownNetworkError(net)
+	}
+	if err != nil {
+		return nil, &OpError{"dial", net + " " + addr, nil, err}
+	}
+	return
+}
+
+// Listen announces on the local network address laddr.
+// The network string net must be a stream-oriented
+// network: "tcp", "tcp4", "tcp6", or "unix", or "unixpacket".
+func Listen(net, laddr string) (l Listener, err os.Error) {
+	switch net {
+	case "tcp", "tcp4", "tcp6":
+		var la *TCPAddr
+		if laddr != "" {
+			if la, err = ResolveTCPAddr(net, laddr); err != nil {
+				return nil, err
+			}
+		}
+		l, err := ListenTCP(net, la)
+		if err != nil {
+			return nil, err
+		}
+		return l, nil
+	case "unix", "unixpacket":
+		var la *UnixAddr
+		if laddr != "" {
+			if la, err = ResolveUnixAddr(net, laddr); err != nil {
+				return nil, err
+			}
+		}
+		l, err := ListenUnix(net, la)
+		if err != nil {
+			return nil, err
+		}
+		return l, nil
+	}
+	return nil, UnknownNetworkError(net)
+}
+
+// ListenPacket announces on the local network address laddr.
+// The network string net must be a packet-oriented network:
+// "udp", "udp4", "udp6", or "unixgram".
+func ListenPacket(net, laddr string) (c PacketConn, err os.Error) {
+	switch net {
+	case "udp", "udp4", "udp6":
+		var la *UDPAddr
+		if laddr != "" {
+			if la, err = ResolveUDPAddr(net, laddr); err != nil {
+				return nil, err
+			}
+		}
+		c, err := ListenUDP(net, la)
+		if err != nil {
+			return nil, err
+		}
+		return c, nil
+	case "unixgram":
+		var la *UnixAddr
+		if laddr != "" {
+			if la, err = ResolveUnixAddr(net, laddr); err != nil {
+				return nil, err
+			}
+		}
+		c, err := DialUnix(net, la, nil)
+		if err != nil {
+			return nil, err
+		}
+		return c, nil
+	}
+
+	var rawnet string
+	if rawnet, _, err = splitNetProto(net); err != nil {
+		switch rawnet {
+		case "ip", "ip4", "ip6":
+			var la *IPAddr
+			if laddr != "" {
+				if la, err = ResolveIPAddr(rawnet, laddr); err != nil {
+					return nil, err
+				}
+			}
+			c, err := ListenIP(net, la)
+			if err != nil {
+				return nil, err
+			}
+			return c, nil
+		}
+	}
+
+	return nil, UnknownNetworkError(net)
+}