Imported Upstream version 60upstream/60

1 files changed, 80 insertions, 0 deletions

diff --git a/src/pkg/net/interface_freebsd.go b/src/pkg/net/interface_freebsd.go
new file mode 100644
index 000000000..20f506b08
--- /dev/null
+++ b/src/pkg/net/interface_freebsd.go
@@ -0,0 +1,80 @@
+// 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 for FreeBSD
+
+package net
+
+import (
+	"os"
+	"syscall"
+)
+
+// If the ifindex is zero, interfaceMulticastAddrTable returns
+// addresses for all network interfaces.  Otherwise it returns
+// addresses for a specific interface.
+func interfaceMulticastAddrTable(ifindex int) ([]Addr, os.Error) {
+	var (
+		tab   []byte
+		e     int
+		msgs  []syscall.RoutingMessage
+		ifmat []Addr
+	)
+
+	tab, e = syscall.RouteRIB(syscall.NET_RT_IFMALIST, ifindex)
+	if e != 0 {
+		return nil, os.NewSyscallError("route rib", e)
+	}
+
+	msgs, e = syscall.ParseRoutingMessage(tab)
+	if e != 0 {
+		return nil, os.NewSyscallError("route message", e)
+	}
+
+	for _, m := range msgs {
+		switch v := m.(type) {
+		case *syscall.InterfaceMulticastAddrMessage:
+			if ifindex == 0 || ifindex == int(v.Header.Index) {
+				ifma, err := newMulticastAddr(v)
+				if err != nil {
+					return nil, err
+				}
+				ifmat = append(ifmat, ifma...)
+			}
+		}
+	}
+
+	return ifmat, nil
+}
+
+func newMulticastAddr(m *syscall.InterfaceMulticastAddrMessage) ([]Addr, os.Error) {
+	var ifmat []Addr
+
+	sas, e := syscall.ParseRoutingSockaddr(m)
+	if e != 0 {
+		return nil, os.NewSyscallError("route sockaddr", e)
+	}
+
+	for _, s := range sas {
+		switch v := s.(type) {
+		case *syscall.SockaddrInet4:
+			ifma := &IPAddr{IP: IPv4(v.Addr[0], v.Addr[1], v.Addr[2], v.Addr[3])}
+			ifmat = append(ifmat, ifma.toAddr())
+		case *syscall.SockaddrInet6:
+			ifma := &IPAddr{IP: make(IP, IPv6len)}
+			copy(ifma.IP, v.Addr[:])
+			// NOTE: KAME based IPv6 protcol stack usually embeds
+			// the interface index in the interface-local or link-
+			// local address as the kernel-internal form.
+			if ifma.IP.IsInterfaceLocalMulticast() ||
+				ifma.IP.IsLinkLocalMulticast() {
+				// remove embedded scope zone ID
+				ifma.IP[2], ifma.IP[3] = 0, 0
+			}
+			ifmat = append(ifmat, ifma.toAddr())
+		}
+	}
+
+	return ifmat, nil
+}