1 files changed, 53 insertions, 0 deletions
diff --git a/src/net/interface_darwin.go b/src/net/interface_darwin.go
new file mode 100644
index 0000000..bb4fd73
--- /dev/null
+++ b/src/net/interface_darwin.go
@@ -0,0 +1,53 @@
+// 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.
+
+package net
+
+import (
+	"syscall"
+
+	"golang.org/x/net/route"
+)
+
+func interfaceMessages(ifindex int) ([]route.Message, error) {
+	rib, err := route.FetchRIB(syscall.AF_UNSPEC, syscall.NET_RT_IFLIST, ifindex)
+	if err != nil {
+		return nil, err
+	}
+	return route.ParseRIB(syscall.NET_RT_IFLIST, rib)
+}
+
+// interfaceMulticastAddrTable returns addresses for a specific
+// interface.
+func interfaceMulticastAddrTable(ifi *Interface) ([]Addr, error) {
+	rib, err := route.FetchRIB(syscall.AF_UNSPEC, syscall.NET_RT_IFLIST2, ifi.Index)
+	if err != nil {
+		return nil, err
+	}
+	msgs, err := route.ParseRIB(syscall.NET_RT_IFLIST2, rib)
+	if err != nil {
+		return nil, err
+	}
+	ifmat := make([]Addr, 0, len(msgs))
+	for _, m := range msgs {
+		switch m := m.(type) {
+		case *route.InterfaceMulticastAddrMessage:
+			if ifi.Index != m.Index {
+				continue
+			}
+			var ip IP
+			switch sa := m.Addrs[syscall.RTAX_IFA].(type) {
+			case *route.Inet4Addr:
+				ip = IPv4(sa.IP[0], sa.IP[1], sa.IP[2], sa.IP[3])
+			case *route.Inet6Addr:
+				ip = make(IP, IPv6len)
+				copy(ip, sa.IP[:])
+			}
+			if ip != nil {
+				ifmat = append(ifmat, &IPAddr{IP: ip})
+			}
+		}
+	}
+	return ifmat, nil
+}