Logo Search packages:      
Sourcecode: radvd version File versions  Download package

socket.c

/*
 *   $Id: socket.c,v 1.6 2004/02/05 18:44:00 lutchann Exp $
 *
 *   Authors:
 *    Pedro Roque       <roque@di.fc.ul.pt>
 *    Lars Fenneberg          <lf@elemental.net>
 *
 *   This software is Copyright 1996,1997 by the above mentioned author(s), 
 *   All Rights Reserved.
 *
 *   The license which is distributed with this software in the file COPYRIGHT
 *   applies to this software. If your distribution is missing this file, you
 *   may request it from <lutchann@litech.org>.
 *
 */

#include <config.h>
#include <includes.h>
#include <radvd.h>

/* Note: these are applicable to receiving sockopts only */
#if defined IPV6_HOPLIMIT && !defined IPV6_RECVHOPLIMIT
# define IPV6_RECVHOPLIMIT IPV6_HOPLIMIT
#endif

#if defined IPV6_PKTINFO && !defined IPV6_RECVPKTINFO
# define IPV6_RECVPKTINFO IPV6_PKTINFO
#endif

int
open_icmpv6_socket(void)
{
      int sock;
      struct icmp6_filter filter;
      int err, val;

        sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
      if (sock < 0)
      {
            flog(LOG_ERR, "can't create socket(AF_INET6): %s", strerror(errno));
            return (-1);
      }

      val = 1;
      err = setsockopt(sock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &val, sizeof(val));
      if (err < 0)
      {
            flog(LOG_ERR, "setsockopt(IPV6_RECVPKTINFO): %s", strerror(errno));
            return (-1);
      }

      val = 2;
#ifdef __linux__
      err = setsockopt(sock, IPPROTO_RAW, IPV6_CHECKSUM, &val, sizeof(val));
#else
      err = setsockopt(sock, IPPROTO_IPV6, IPV6_CHECKSUM, &val, sizeof(val));
#endif
      if (err < 0)
      {
            flog(LOG_ERR, "setsockopt(IPV6_CHECKSUM): %s", strerror(errno));
            return (-1);
      }

      val = 255;
      err = setsockopt(sock, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &val, sizeof(val));
      if (err < 0)
      {
            flog(LOG_ERR, "setsockopt(IPV6_UNICAST_HOPS): %s", strerror(errno));
            return (-1);
      }

      val = 255;
      err = setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &val, sizeof(val));
      if (err < 0)
      {
            flog(LOG_ERR, "setsockopt(IPV6_MULTICAST_HOPS): %s", strerror(errno));
            return (-1);
      }

#ifdef IPV6_RECVHOPLIMIT
      val = 1;
      err = setsockopt(sock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &val, sizeof(val));
      if (err < 0)
      {
            flog(LOG_ERR, "setsockopt(IPV6_RECVHOPLIMIT): %s", strerror(errno));
            return (-1);
      }
#endif

      /*
       * setup ICMP filter
       */
      
      ICMP6_FILTER_SETBLOCKALL(&filter);
      ICMP6_FILTER_SETPASS(ND_ROUTER_SOLICIT, &filter);
      ICMP6_FILTER_SETPASS(ND_ROUTER_ADVERT, &filter);

      err = setsockopt(sock, IPPROTO_ICMPV6, ICMP6_FILTER, &filter,
                   sizeof(filter));
      if (err < 0)
      {
            flog(LOG_ERR, "setsockopt(ICMPV6_FILTER): %s", strerror(errno));
            return (-1);
      }

      return sock;
}

Generated by  Doxygen 1.6.0   Back to index