[Gc-linux-cvs] ipl/lwip/core/ipv6 README,NONE,1.1 icmp6.c,NONE,1.1 ip6.c,NONE,1.1 ip6_addr.c,NONE,1.1

[<rob...@us...>]

Update of /cvsroot/gc-linux/ipl/lwip/core/ipv6
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv24482

Added Files:
	README icmp6.c ip6.c ip6_addr.c 
Log Message:
adding lwip/core/ipv6


--- NEW FILE: README ---
IPv6 support in lwIP is very experimental.

--- NEW FILE: icmp6.c ---
/*
 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 *
 * This file is part of the lwIP TCP/IP stack.
 *
 * Author: Adam Dunkels <ad...@si...>
 *
 */

/* Some ICMP messages should be passed to the transport protocols. This
   is not implemented. */

#include "lwip/opt.h"

#include "lwip/icmp.h"
#include "lwip/inet.h"
#include "lwip/ip.h"
#include "lwip/def.h"

#include "lwip/stats.h"


void
icmp_input(struct pbuf *p, struct netif *inp)
{
  unsigned char type;
  struct icmp_echo_hdr *iecho;
  struct ip_hdr *iphdr;
  struct ip_addr tmpaddr;

#ifdef ICMP_STATS
  ++lwip_stats.icmp.recv;
#endif /* ICMP_STATS */

  /* TODO: check length before accessing payload! */

  type = ((char *)p->payload)[0];

  switch (type) {
  case ICMP6_ECHO:
    LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ping\n"));

    if (p->tot_len < sizeof(struct icmp_echo_hdr)) {
      LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: bad ICMP echo received\n"));

      pbuf_free(p);
#ifdef ICMP_STATS
      ++lwip_stats.icmp.lenerr;
#endif /* ICMP_STATS */

      return;
    }
    iecho = p->payload;
    iphdr = (struct ip_hdr *)((char *)p->payload - IP_HLEN);
    if (inet_chksum_pbuf(p) != 0) {
      LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: checksum failed for received ICMP echo (%x)\n", inet_chksum_pseudo(p, &(iphdr->src), &(iphdr->dest), IP_PROTO_ICMP, p->tot_len)));

#ifdef ICMP_STATS
      ++lwip_stats.icmp.chkerr;
#endif /* ICMP_STATS */
    /*      return;*/
    }
    LWIP_DEBUGF(ICMP_DEBUG, ("icmp: p->len %d p->tot_len %d\n", p->len, p->tot_len));
    ip_addr_set(&tmpaddr, &(iphdr->src));
    ip_addr_set(&(iphdr->src), &(iphdr->dest));
    ip_addr_set(&(iphdr->dest), &tmpaddr);
    iecho->type = ICMP6_ER;
    /* adjust the checksum */
    if (iecho->chksum >= htons(0xffff - (ICMP6_ECHO << 8))) {
      iecho->chksum += htons(ICMP6_ECHO << 8) + 1;
    } else {
      iecho->chksum += htons(ICMP6_ECHO << 8);
    }
    LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: checksum failed for received ICMP echo (%x)\n", inet_chksum_pseudo(p, &(iphdr->src), &(iphdr->dest), IP_PROTO_ICMP, p->tot_len)));
#ifdef ICMP_STATS
    ++lwip_stats.icmp.xmit;
#endif /* ICMP_STATS */

    /*    LWIP_DEBUGF("icmp: p->len %u p->tot_len %u\n", p->len, p->tot_len);*/
    ip_output_if (p, &(iphdr->src), IP_HDRINCL,
     iphdr->hoplim, IP_PROTO_ICMP, inp);
    break;
  default:
    LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ICMP type %d not supported.\n", (int)type));
#ifdef ICMP_STATS
    ++lwip_stats.icmp.proterr;
    ++lwip_stats.icmp.drop;
#endif /* ICMP_STATS */
  }

  pbuf_free(p);
}

void
icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t)
{
  struct pbuf *q;
  struct ip_hdr *iphdr;
  struct icmp_dur_hdr *idur;

  q = pbuf_alloc(PBUF_IP, 8 + IP_HLEN + 8, PBUF_RAM);
  /* ICMP header + IP header + 8 bytes of data */

  iphdr = p->payload;

  idur = q->payload;
  idur->type = (char)ICMP6_DUR;
  idur->icode = (char)t;

  memcpy((char *)q->payload + 8, p->payload, IP_HLEN + 8);

  /* calculate checksum */
  idur->chksum = 0;
  idur->chksum = inet_chksum(idur, q->len);
#ifdef ICMP_STATS
  ++lwip_stats.icmp.xmit;
#endif /* ICMP_STATS */

  ip_output(q, NULL,
      (struct ip_addr *)&(iphdr->src), ICMP_TTL, IP_PROTO_ICMP);
  pbuf_free(q);
}

void
icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t)
{
  struct pbuf *q;
  struct ip_hdr *iphdr;
  struct icmp_te_hdr *tehdr;

  LWIP_DEBUGF(ICMP_DEBUG, ("icmp_time_exceeded\n"));

  q = pbuf_alloc(PBUF_IP, 8 + IP_HLEN + 8, PBUF_RAM);

  iphdr = p->payload;

  tehdr = q->payload;
  tehdr->type = (char)ICMP6_TE;
  tehdr->icode = (char)t;

  /* copy fields from original packet */
  memcpy((char *)q->payload + 8, (char *)p->payload, IP_HLEN + 8);

  /* calculate checksum */
  tehdr->chksum = 0;
  tehdr->chksum = inet_chksum(tehdr, q->len);
#ifdef ICMP_STATS
  ++lwip_stats.icmp.xmit;
#endif /* ICMP_STATS */
  ip_output(q, NULL,
      (struct ip_addr *)&(iphdr->src), ICMP_TTL, IP_PROTO_ICMP);
  pbuf_free(q);
}









--- NEW FILE: ip6.c ---
/*
 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 *
 * This file is part of the lwIP TCP/IP stack.
 *
 * Author: Adam Dunkels <ad...@si...>
 *
 */



/* ip.c
 *
 * This is the code for the IP layer for IPv6.
 *
 */


#include "lwip/opt.h"

#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/ip.h"
#include "lwip/inet.h"
#include "lwip/netif.h"
#include "lwip/icmp.h"
#include "lwip/udp.h"
#include "lwip/tcp.h"

#include "lwip/stats.h"

#include "arch/perf.h"

/* ip_init:
 *
 * Initializes the IP layer.
 */

void
ip_init(void)
{
}

/* ip_route:
 *
 * Finds the appropriate network interface for a given IP address. It searches the
 * list of network interfaces linearly. A match is found if the masked IP address of
 * the network interface equals the masked IP address given to the function.
 */

struct netif *
ip_route(struct ip_addr *dest)
{
  struct netif *netif;

  for(netif = netif_list; netif != NULL; netif = netif->next) {
    if (ip_addr_maskcmp(dest, &(netif->ip_addr), &(netif->netmask))) {
      return netif;
    }
  }

  return netif_default;
}

/* ip_forward:
 *
 * Forwards an IP packet. It finds an appropriate route for the packet, decrements
 * the TTL value of the packet, adjusts the checksum and outputs the packet on the
 * appropriate interface.
 */

static void
ip_forward(struct pbuf *p, struct ip_hdr *iphdr)
{
  struct netif *netif;

  PERF_START;

  if ((netif = ip_route((struct ip_addr *)&(iphdr->dest))) == NULL) {

    LWIP_DEBUGF(IP_DEBUG, ("ip_input: no forwarding route found for "));
#if IP_DEBUG
    ip_addr_debug_print(IP_DEBUG, &(iphdr->dest));
#endif /* IP_DEBUG */
    LWIP_DEBUGF(IP_DEBUG, ("\n"));
    pbuf_free(p);
    return;
  }
  /* Decrement TTL and send ICMP if ttl == 0. */
  if (--iphdr->hoplim == 0) {
    /* Don't send ICMP messages in response to ICMP messages */
    if (iphdr->nexthdr != IP_PROTO_ICMP) {
      icmp_time_exceeded(p, ICMP_TE_TTL);
    }
    pbuf_free(p);
    return;
  }

  /* Incremental update of the IP checksum. */
  /*  if (iphdr->chksum >= htons(0xffff - 0x100)) {
    iphdr->chksum += htons(0x100) + 1;
  } else {
    iphdr->chksum += htons(0x100);
    }*/


  LWIP_DEBUGF(IP_DEBUG, ("ip_forward: forwarding packet to "));
#if IP_DEBUG
  ip_addr_debug_print(IP_DEBUG, &(iphdr->dest));
#endif /* IP_DEBUG */
  LWIP_DEBUGF(IP_DEBUG, ("\n"));

#ifdef IP_STATS
  ++lwip_stats.ip.fw;
  ++lwip_stats.ip.xmit;
#endif /* IP_STATS */

  PERF_STOP("ip_forward");

  netif->output(netif, p, (struct ip_addr *)&(iphdr->dest));
}

/* ip_input:
 *
 * This function is called by the network interface device driver when an IP packet is
 * received. The function does the basic checks of the IP header such as packet size
 * being at least larger than the header size etc. If the packet was not destined for
 * us, the packet is forwarded (using ip_forward). The IP checksum is always checked.
 *
 * Finally, the packet is sent to the upper layer protocol input function.
 */

void
ip_input(struct pbuf *p, struct netif *inp) {
  struct ip_hdr *iphdr;
  struct netif *netif;


  PERF_START;

#if IP_DEBUG
  ip_debug_print(p);
#endif /* IP_DEBUG */


#ifdef IP_STATS
  ++lwip_stats.ip.recv;
#endif /* IP_STATS */

  /* identify the IP header */
  iphdr = p->payload;


  if (iphdr->v != 6) {
    LWIP_DEBUGF(IP_DEBUG, ("IP packet dropped due to bad version number\n"));
#if IP_DEBUG
    ip_debug_print(p);
#endif /* IP_DEBUG */
    pbuf_free(p);
#ifdef IP_STATS
    ++lwip_stats.ip.err;
    ++lwip_stats.ip.drop;
#endif /* IP_STATS */
    return;
  }

  /* is this packet for us? */
  for(netif = netif_list; netif != NULL; netif = netif->next) {
#if IP_DEBUG
    LWIP_DEBUGF(IP_DEBUG, ("ip_input: iphdr->dest "));
    ip_addr_debug_print(IP_DEBUG, &(iphdr->dest));
    LWIP_DEBUGF(IP_DEBUG, ("netif->ip_addr "));
    ip_addr_debug_print(IP_DEBUG, &(netif->ip_addr));
    LWIP_DEBUGF(IP_DEBUG, ("\n"));
#endif /* IP_DEBUG */
    if (ip_addr_cmp(&(iphdr->dest), &(netif->ip_addr))) {
      break;
    }
  }


  if (netif == NULL) {
    /* packet not for us, route or discard */
#ifdef IP_FORWARD
    ip_forward(p, iphdr);
#endif
    pbuf_free(p);
    return;
  }

  pbuf_realloc(p, IP_HLEN + ntohs(iphdr->len));

  /* send to upper layers */
#if IP_DEBUG
  /*  LWIP_DEBUGF("ip_input: \n");
  ip_debug_print(p);
  LWIP_DEBUGF("ip_input: p->len %u p->tot_len %u\n", p->len, p->tot_len);*/
#endif /* IP_DEBUG */


  pbuf_header(p, -IP_HLEN);

  switch (iphdr->nexthdr) {
  case IP_PROTO_UDP:
    udp_input(p);
    break;
  case IP_PROTO_TCP:
    tcp_input(p);
    break;
  case IP_PROTO_ICMP:
    icmp_input(p, inp);
    break;
  default:
    /* send ICMP destination protocol unreachable */
    icmp_dest_unreach(p, ICMP_DUR_PROTO);
    pbuf_free(p);
    LWIP_DEBUGF(IP_DEBUG, ("Unsupported transport protocol %u\n",
          iphdr->nexthdr));

#ifdef IP_STATS
    ++lwip_stats.ip.proterr;
    ++lwip_stats.ip.drop;
#endif /* IP_STATS */

  }
  PERF_STOP("ip_input");
}


/* ip_output_if:
 *
 * Sends an IP packet on a network interface. This function constructs the IP header
 * and calculates the IP header checksum. If the source IP address is NULL,
 * the IP address of the outgoing network interface is filled in as source address.
 */

err_t
ip_output_if (struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
       u8_t ttl,
       u8_t proto, struct netif *netif)
{
  struct ip_hdr *iphdr;

  PERF_START;

  printf("len %u tot_len %u\n", p->len, p->tot_len);
  if (pbuf_header(p, IP_HLEN)) {
    LWIP_DEBUGF(IP_DEBUG, ("ip_output: not enough room for IP header in pbuf\n"));
#ifdef IP_STATS
    ++lwip_stats.ip.err;
#endif /* IP_STATS */

    return ERR_BUF;
  }
  printf("len %u tot_len %u\n", p->len, p->tot_len);

  iphdr = p->payload;


  if (dest != IP_HDRINCL) {
    printf("!IP_HDRLINCL\n");
    iphdr->hoplim = ttl;
    iphdr->nexthdr = proto;
    iphdr->len = htons(p->tot_len - IP_HLEN);
    ip_addr_set(&(iphdr->dest), dest);

    iphdr->v = 6;

    if (ip_addr_isany(src)) {
      ip_addr_set(&(iphdr->src), &(netif->ip_addr));
    } else {
      ip_addr_set(&(iphdr->src), src);
    }

  } else {
    dest = &(iphdr->dest);
  }

#ifdef IP_STATS
  ++lwip_stats.ip.xmit;
#endif /* IP_STATS */

  LWIP_DEBUGF(IP_DEBUG, ("ip_output_if: %c%c (len %u)\n", netif->name[0], netif->name[1], p->tot_len));
#if IP_DEBUG
  ip_debug_print(p);
#endif /* IP_DEBUG */

  PERF_STOP("ip_output_if");
  return netif->output(netif, p, dest);
}

/* ip_output:
 *
 * Simple interface to ip_output_if. It finds the outgoing network interface and
 * calls upon ip_output_if to do the actual work.
 */

err_t
ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
    u8_t ttl, u8_t proto)
{
  struct netif *netif;
  if ((netif = ip_route(dest)) == NULL) {
    LWIP_DEBUGF(IP_DEBUG, ("ip_output: No route to 0x%lx\n", dest->addr));
#ifdef IP_STATS
    ++lwip_stats.ip.rterr;
#endif /* IP_STATS */
    return ERR_RTE;
  }

  return ip_output_if (p, src, dest, ttl, proto, netif);
}

#if IP_DEBUG
void
ip_debug_print(struct pbuf *p)
{
  struct ip_hdr *iphdr = p->payload;
  char *payload;

  payload = (char *)iphdr + IP_HLEN;

  LWIP_DEBUGF(IP_DEBUG, ("IP header:\n"));
  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
  LWIP_DEBUGF(IP_DEBUG, ("|%2d |  %x%x  |      %x%x           | (v, traffic class, flow label)\n",
        iphdr->v,
        iphdr->tclass1, iphdr->tclass2,
        iphdr->flow1, iphdr->flow2));
  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
  LWIP_DEBUGF(IP_DEBUG, ("|    %5u      | %2u  |  %2u   | (len, nexthdr, hoplim)\n",
        ntohs(iphdr->len),
        iphdr->nexthdr,
        iphdr->hoplim));
  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
  LWIP_DEBUGF(IP_DEBUG, ("|       %4lx      |       %4lx     | (src)\n",
        ntohl(iphdr->src.addr[0]) >> 16 & 0xffff,
        ntohl(iphdr->src.addr[0]) & 0xffff));
  LWIP_DEBUGF(IP_DEBUG, ("|       %4lx      |       %4lx     | (src)\n",
        ntohl(iphdr->src.addr[1]) >> 16 & 0xffff,
        ntohl(iphdr->src.addr[1]) & 0xffff));
  LWIP_DEBUGF(IP_DEBUG, ("|       %4lx      |       %4lx     | (src)\n",
        ntohl(iphdr->src.addr[2]) >> 16 & 0xffff,
        ntohl(iphdr->src.addr[2]) & 0xffff));
  LWIP_DEBUGF(IP_DEBUG, ("|       %4lx      |       %4lx     | (src)\n",
        ntohl(iphdr->src.addr[3]) >> 16 & 0xffff,
        ntohl(iphdr->src.addr[3]) & 0xffff));
  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
  LWIP_DEBUGF(IP_DEBUG, ("|       %4lx      |       %4lx     | (dest)\n",
        ntohl(iphdr->dest.addr[0]) >> 16 & 0xffff,
        ntohl(iphdr->dest.addr[0]) & 0xffff));
  LWIP_DEBUGF(IP_DEBUG, ("|       %4lx      |       %4lx     | (dest)\n",
        ntohl(iphdr->dest.addr[1]) >> 16 & 0xffff,
        ntohl(iphdr->dest.addr[1]) & 0xffff));
  LWIP_DEBUGF(IP_DEBUG, ("|       %4lx      |       %4lx     | (dest)\n",
        ntohl(iphdr->dest.addr[2]) >> 16 & 0xffff,
        ntohl(iphdr->dest.addr[2]) & 0xffff));
  LWIP_DEBUGF(IP_DEBUG, ("|       %4lx      |       %4lx     | (dest)\n",
        ntohl(iphdr->dest.addr[3]) >> 16 & 0xffff,
        ntohl(iphdr->dest.addr[3]) & 0xffff));
  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
}
#endif /* IP_DEBUG */


--- NEW FILE: ip6_addr.c ---
/*
 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
 * All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
 * OF SUCH DAMAGE.
 *
 * This file is part of the lwIP TCP/IP stack.
 * 
 * Author: Adam Dunkels <ad...@si...>
 *
 */

#include "lwip/ip_addr.h"
#include "lwip/inet.h"


int
ip_addr_maskcmp(struct ip_addr *addr1, struct ip_addr *addr2,
                struct ip_addr *mask)
{
  return((addr1->addr[0] & mask->addr[0]) == (addr2->addr[0] & mask->addr[0]) &&
         (addr1->addr[1] & mask->addr[1]) == (addr2->addr[1] & mask->addr[1]) &&
         (addr1->addr[2] & mask->addr[2]) == (addr2->addr[2] & mask->addr[2]) &&
         (addr1->addr[3] & mask->addr[3]) == (addr2->addr[3] & mask->addr[3]));
        
}

int
ip_addr_cmp(struct ip_addr *addr1, struct ip_addr *addr2)
{
  return(addr1->addr[0] == addr2->addr[0] &&
         addr1->addr[1] == addr2->addr[1] &&
         addr1->addr[2] == addr2->addr[2] &&
         addr1->addr[3] == addr2->addr[3]);
}

void
ip_addr_set(struct ip_addr *dest, struct ip_addr *src)
{
  memcpy(dest, src, sizeof(struct ip_addr));
  /*  dest->addr[0] = src->addr[0];
  dest->addr[1] = src->addr[1];
  dest->addr[2] = src->addr[2];
  dest->addr[3] = src->addr[3];*/
}

int
ip_addr_isany(struct ip_addr *addr)
{
  if (addr == NULL) return 1;
  return((addr->addr[0] | addr->addr[1] | addr->addr[2] | addr->addr[3]) == 0);
}


/*#if IP_DEBUG*/
void
ip_addr_debug_print(struct ip_addr *addr)
{
  printf("%lx:%lx:%lx:%lx:%lx:%lx:%lx:%lx",
         ntohl(addr->addr[0]) >> 16 & 0xffff,
         ntohl(addr->addr[0]) & 0xffff,
         ntohl(addr->addr[1]) >> 16 & 0xffff,
         ntohl(addr->addr[1]) & 0xffff,
         ntohl(addr->addr[2]) >> 16 & 0xffff,
         ntohl(addr->addr[2]) & 0xffff,
         ntohl(addr->addr[3]) >> 16 & 0xffff,
         ntohl(addr->addr[3]) & 0xffff);
}
/*#endif*/ /* IP_DEBUG */