interface_freebsd.mx raw

   1  // Copyright 2011 The Go Authors. All rights reserved.
   2  // Use of this source code is governed by a BSD-style
   3  // license that can be found in the LICENSE file.
   4  
   5  package net
   6  
   7  import (
   8  	"internal/routebsd"
   9  	"syscall"
  10  )
  11  
  12  func interfaceMessages(ifindex int) ([]routebsd.Message, error) {
  13  	return routebsd.FetchRIBMessages(syscall.NET_RT_IFLIST, ifindex)
  14  }
  15  
  16  // interfaceMulticastAddrTable returns addresses for a specific
  17  // interface.
  18  func interfaceMulticastAddrTable(ifi *Interface) ([]Addr, error) {
  19  	msgs, err := routebsd.FetchRIBMessages(syscall.NET_RT_IFMALIST, ifi.Index)
  20  	if err != nil {
  21  		return nil, err
  22  	}
  23  	ifmat := []Addr{:0:len(msgs)}
  24  	for _, m := range msgs {
  25  		switch m := m.(type) {
  26  		case *routebsd.InterfaceMulticastAddrMessage:
  27  			if ifi.Index != m.Index {
  28  				continue
  29  			}
  30  			var ip IP
  31  			switch sa := m.Addrs[syscall.RTAX_IFA].(type) {
  32  			case *routebsd.InetAddr:
  33  				if sa.IP.Is4() {
  34  					a := sa.IP.As4()
  35  					ip = IPv4(a[0], a[1], a[2], a[3])
  36  				} else if sa.IP.Is6() {
  37  					a := sa.IP.As16()
  38  					ip = make(IP, IPv6len)
  39  					copy(ip, a[:])
  40  				}
  41  			}
  42  			if ip != nil {
  43  				ifmat = append(ifmat, &IPAddr{IP: ip})
  44  			}
  45  		}
  46  	}
  47  	return ifmat, nil
  48  }
  49