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Source file src/net/interface_freebsd.go

Documentation: net

  // 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) {
  	typ := route.RIBType(syscall.NET_RT_IFLISTL)
  	rib, err := route.FetchRIB(syscall.AF_UNSPEC, typ, ifindex)
  	if err != nil {
  		typ = route.RIBType(syscall.NET_RT_IFLIST)
  		rib, err = route.FetchRIB(syscall.AF_UNSPEC, typ, ifindex)
  	}
  	if err != nil {
  		return nil, err
  	}
  	return route.ParseRIB(typ, rib)
  }
  
  // interfaceMulticastAddrTable returns addresses for a specific
  // interface.
  func interfaceMulticastAddrTable(ifi *Interface) ([]Addr, error) {
  	rib, err := route.FetchRIB(syscall.AF_UNSPEC, syscall.NET_RT_IFMALIST, ifi.Index)
  	if err != nil {
  		return nil, err
  	}
  	msgs, err := route.ParseRIB(syscall.NET_RT_IFMALIST, 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
  }
  

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