Imported Upstream version 58upstream/58

1 files changed, 89 insertions, 0 deletions

diff --git a/src/pkg/net/interface.go b/src/pkg/net/interface.go
new file mode 100644
index 000000000..f622487ab
--- /dev/null
+++ b/src/pkg/net/interface.go
@@ -0,0 +1,89 @@
+// Copyright 2011 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.
+
+// Network interface identification
+
+package net
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+)
+
+// A HardwareAddr represents a physical hardware address.
+type HardwareAddr []byte
+
+func (a HardwareAddr) String() string {
+	var buf bytes.Buffer
+	for i, b := range a {
+		if i > 0 {
+			buf.WriteByte(':')
+		}
+		fmt.Fprintf(&buf, "%02x", b)
+	}
+	return buf.String()
+}
+
+// Interface represents a mapping between network interface name
+// and index.  It also represents network interface facility
+// information.
+type Interface struct {
+	Index        int          // positive integer that starts at one, zero is never used
+	MTU          int          // maximum transmission unit
+	Name         string       // e.g., "en0", "lo0", "eth0.100"
+	HardwareAddr HardwareAddr // IEEE MAC-48, EUI-48 and EUI-64 form
+	rawFlags     int
+}
+
+// Addrs returns interface addresses for a specific interface.
+func (ifi *Interface) Addrs() ([]Addr, os.Error) {
+	if ifi == nil {
+		return nil, os.NewError("net: invalid interface")
+	}
+	return interfaceAddrTable(ifi.Index)
+}
+
+// Interfaces returns a list of the systems's network interfaces.
+func Interfaces() ([]Interface, os.Error) {
+	return interfaceTable(0)
+}
+
+// InterfaceAddrs returns a list of the system's network interface
+// addresses.
+func InterfaceAddrs() ([]Addr, os.Error) {
+	return interfaceAddrTable(0)
+}
+
+// InterfaceByIndex returns the interface specified by index.
+func InterfaceByIndex(index int) (*Interface, os.Error) {
+	if index <= 0 {
+		return nil, os.NewError("net: invalid interface index")
+	}
+	ift, err := interfaceTable(index)
+	if err != nil {
+		return nil, err
+	}
+	for _, ifi := range ift {
+		return &ifi, nil
+	}
+	return nil, os.NewError("net: no such interface")
+}
+
+// InterfaceByName returns the interface specified by name.
+func InterfaceByName(name string) (*Interface, os.Error) {
+	if name == "" {
+		return nil, os.NewError("net: invalid interface name")
+	}
+	ift, err := interfaceTable(0)
+	if err != nil {
+		return nil, err
+	}
+	for _, ifi := range ift {
+		if name == ifi.Name {
+			return &ifi, nil
+		}
+	}
+	return nil, os.NewError("net: no such interface")
+}