1 files changed, 54 insertions, 0 deletions
diff --git a/src/net/udpsock.go b/src/net/udpsock.go
new file mode 100644
index 000000000..4c99ae4af
--- /dev/null
+++ b/src/net/udpsock.go
@@ -0,0 +1,54 @@
+// Copyright 2009 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
+
+// UDPAddr represents the address of a UDP end point.
+type UDPAddr struct {
+	IP   IP
+	Port int
+	Zone string // IPv6 scoped addressing zone
+}
+
+// Network returns the address's network name, "udp".
+func (a *UDPAddr) Network() string { return "udp" }
+
+func (a *UDPAddr) String() string {
+	if a == nil {
+		return "<nil>"
+	}
+	ip := ipEmptyString(a.IP)
+	if a.Zone != "" {
+		return JoinHostPort(ip+"%"+a.Zone, itoa(a.Port))
+	}
+	return JoinHostPort(ip, itoa(a.Port))
+}
+
+func (a *UDPAddr) toAddr() Addr {
+	if a == nil {
+		return nil
+	}
+	return a
+}
+
+// ResolveUDPAddr parses addr as a UDP address of the form "host:port"
+// or "[ipv6-host%zone]:port" and resolves a pair of domain name and
+// port name on the network net, which must be "udp", "udp4" or
+// "udp6".  A literal address or host name for IPv6 must be enclosed
+// in square brackets, as in "[::1]:80", "[ipv6-host]:http" or
+// "[ipv6-host%zone]:80".
+func ResolveUDPAddr(net, addr string) (*UDPAddr, error) {
+	switch net {
+	case "udp", "udp4", "udp6":
+	case "": // a hint wildcard for Go 1.0 undocumented behavior
+		net = "udp"
+	default:
+		return nil, UnknownNetworkError(net)
+	}
+	a, err := resolveInternetAddr(net, addr, noDeadline)
+	if err != nil {
+		return nil, err
+	}
+	return a.toAddr().(*UDPAddr), nil
+}