minix/lib/liblwip/dist/src/core/ip.c

   1 /**
   2  * @file
   3  * Common IPv4 and IPv6 code
   4  *
   5  * @defgroup ip IP
   6  * @ingroup callbackstyle_api
   7  *
   8  * @defgroup ip4 IPv4
   9  * @ingroup ip
  10  *
  11  * @defgroup ip6 IPv6
  12  * @ingroup ip
  13  *
  14  * @defgroup ipaddr IP address handling
  15  * @ingroup infrastructure
  16  *
  17  * @defgroup ip4addr IPv4 only
  18  * @ingroup ipaddr
  19  *
  20  * @defgroup ip6addr IPv6 only
  21  * @ingroup ipaddr
  22  */
  23
  24 /*
  25  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
  26  * All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without modification,
  29  * are permitted provided that the following conditions are met:
  30  *
  31  * 1. Redistributions of source code must retain the above copyright notice,
  32  *    this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright notice,
  34  *    this list of conditions and the following disclaimer in the documentation
  35  *    and/or other materials provided with the distribution.
  36  * 3. The name of the author may not be used to endorse or promote products
  37  *    derived from this software without specific prior written permission.
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  40  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  41  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  42  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  43  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  44  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  45  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  46  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  47  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  48  * OF SUCH DAMAGE.
  49  *
  50  * This file is part of the lwIP TCP/IP stack.
  51  *
  52  * Author: Adam Dunkels <adam@sics.se>
  53  *
  54  */
  55
  56 #include "lwip/opt.h"
  57
  58 #if LWIP_IPV4 || LWIP_IPV6
  59
  60 #include "lwip/ip_addr.h"
  61 #include "lwip/ip.h"
  62
  63 /** Global data for both IPv4 and IPv6 */
  64 struct ip_globals ip_data;
  65
  66 #if LWIP_IPV4 && LWIP_IPV6
  67
  68 const ip_addr_t ip_addr_any_type = IPADDR_ANY_TYPE_INIT;
  69
  70 /**
  71  * @ingroup ipaddr
  72  * Convert IP address string (both versions) to numeric.
  73  * The version is auto-detected from the string.
  74  *
  75  * @param cp IP address string to convert
  76  * @param addr conversion result is stored here
  77  * @return 1 on success, 0 on error
  78  */
  79 int
  80 ipaddr_aton(const char *cp, ip_addr_t *addr)
  81 {
  82   if (cp != NULL) {
  83     const char* c;
  84     for (c = cp; *c != 0; c++) {
  85       if (*c == ':') {
  86         /* contains a colon: IPv6 address */
  87         if (addr) {
  88           IP_SET_TYPE_VAL(*addr, IPADDR_TYPE_V6);
  89         }
  90         return ip6addr_aton(cp, ip_2_ip6(addr));
  91       } else if (*c == '.') {
  92         /* contains a dot: IPv4 address */
  93         break;
  94       }
  95     }
  96     /* call ip4addr_aton as fallback or if IPv4 was found */
  97     if (addr) {
  98       IP_SET_TYPE_VAL(*addr, IPADDR_TYPE_V4);
  99     }
 100     return ip4addr_aton(cp, ip_2_ip4(addr));
 101   }
 102   return 0;
 103 }
 104
 105 /**
 106  * @ingroup lwip_nosys
 107  * If both IP versions are enabled, this function can dispatch packets to the correct one.
 108  * Don't call directly, pass to netif_add() and call netif->input().
 109  */
 110 err_t
 111 ip_input(struct pbuf *p, struct netif *inp)
 112 {
 113   if (p != NULL) {
 114     if (IP_HDR_GET_VERSION(p->payload) == 6) {
 115       return ip6_input(p, inp);
 116     }
 117     return ip4_input(p, inp);
 118   }
 119   return ERR_VAL;
 120 }
 121
 122 #endif /* LWIP_IPV4 && LWIP_IPV6 */
 123
 124 #endif /* LWIP_IPV4 || LWIP_IPV6 */