1 files changed, 118 insertions, 0 deletions
diff --git a/src/net/interface_bsd.go b/src/net/interface_bsd.go
new file mode 100644
index 0000000..db7bc75
--- /dev/null
+++ b/src/net/interface_bsd.go
@@ -0,0 +1,118 @@
+// 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.
+
+//go:build darwin || dragonfly || freebsd || netbsd || openbsd
+
+package net
+
+import (
+	"syscall"
+
+	"golang.org/x/net/route"
+)
+
+// If the ifindex is zero, interfaceTable returns mappings of all
+// network interfaces. Otherwise it returns a mapping of a specific
+// interface.
+func interfaceTable(ifindex int) ([]Interface, error) {
+	msgs, err := interfaceMessages(ifindex)
+	if err != nil {
+		return nil, err
+	}
+	n := len(msgs)
+	if ifindex != 0 {
+		n = 1
+	}
+	ift := make([]Interface, n)
+	n = 0
+	for _, m := range msgs {
+		switch m := m.(type) {
+		case *route.InterfaceMessage:
+			if ifindex != 0 && ifindex != m.Index {
+				continue
+			}
+			ift[n].Index = m.Index
+			ift[n].Name = m.Name
+			ift[n].Flags = linkFlags(m.Flags)
+			if sa, ok := m.Addrs[syscall.RTAX_IFP].(*route.LinkAddr); ok && len(sa.Addr) > 0 {
+				ift[n].HardwareAddr = make([]byte, len(sa.Addr))
+				copy(ift[n].HardwareAddr, sa.Addr)
+			}
+			for _, sys := range m.Sys() {
+				if imx, ok := sys.(*route.InterfaceMetrics); ok {
+					ift[n].MTU = imx.MTU
+					break
+				}
+			}
+			n++
+			if ifindex == m.Index {
+				return ift[:n], nil
+			}
+		}
+	}
+	return ift[:n], nil
+}
+
+func linkFlags(rawFlags int) Flags {
+	var f Flags
+	if rawFlags&syscall.IFF_UP != 0 {
+		f |= FlagUp
+	}
+	if rawFlags&syscall.IFF_BROADCAST != 0 {
+		f |= FlagBroadcast
+	}
+	if rawFlags&syscall.IFF_LOOPBACK != 0 {
+		f |= FlagLoopback
+	}
+	if rawFlags&syscall.IFF_POINTOPOINT != 0 {
+		f |= FlagPointToPoint
+	}
+	if rawFlags&syscall.IFF_MULTICAST != 0 {
+		f |= FlagMulticast
+	}
+	return f
+}
+
+// If the ifi is nil, interfaceAddrTable returns addresses for all
+// network interfaces. Otherwise it returns addresses for a specific
+// interface.
+func interfaceAddrTable(ifi *Interface) ([]Addr, error) {
+	index := 0
+	if ifi != nil {
+		index = ifi.Index
+	}
+	msgs, err := interfaceMessages(index)
+	if err != nil {
+		return nil, err
+	}
+	ifat := make([]Addr, 0, len(msgs))
+	for _, m := range msgs {
+		switch m := m.(type) {
+		case *route.InterfaceAddrMessage:
+			if index != 0 && index != m.Index {
+				continue
+			}
+			var mask IPMask
+			switch sa := m.Addrs[syscall.RTAX_NETMASK].(type) {
+			case *route.Inet4Addr:
+				mask = IPv4Mask(sa.IP[0], sa.IP[1], sa.IP[2], sa.IP[3])
+			case *route.Inet6Addr:
+				mask = make(IPMask, IPv6len)
+				copy(mask, sa.IP[:])
+			}
+			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 && mask != nil { // NetBSD may contain route.LinkAddr
+				ifat = append(ifat, &IPNet{IP: ip, Mask: mask})
+			}
+		}
+	}
+	return ifat, nil
+}