[457] | 1 | /**
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| 2 | * @file
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| 3 | * Common IPv4 and IPv6 code
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| 4 | *
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| 5 | * @defgroup ip IP
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| 6 | * @ingroup callbackstyle_api
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| 7 | *
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| 8 | * @defgroup ip4 IPv4
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| 9 | * @ingroup ip
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| 10 | *
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| 11 | * @defgroup ip6 IPv6
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| 12 | * @ingroup ip
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| 13 | *
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| 14 | * @defgroup ipaddr IP address handling
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| 15 | * @ingroup infrastructure
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| 16 | *
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| 17 | * @defgroup ip4addr IPv4 only
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| 18 | * @ingroup ipaddr
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| 19 | *
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| 20 | * @defgroup ip6addr IPv6 only
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| 21 | * @ingroup ipaddr
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| 22 | */
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| 23 |
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| 24 | /*
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| 25 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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| 26 | * All rights reserved.
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| 27 | *
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| 28 | * Redistribution and use in source and binary forms, with or without modification,
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| 29 | * are permitted provided that the following conditions are met:
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| 30 | *
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| 31 | * 1. Redistributions of source code must retain the above copyright notice,
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| 32 | * this list of conditions and the following disclaimer.
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| 33 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 34 | * this list of conditions and the following disclaimer in the documentation
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| 35 | * and/or other materials provided with the distribution.
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| 36 | * 3. The name of the author may not be used to endorse or promote products
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| 37 | * derived from this software without specific prior written permission.
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| 38 | *
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| 39 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 40 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 41 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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| 42 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 43 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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| 44 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 45 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 46 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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| 47 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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| 48 | * OF SUCH DAMAGE.
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| 49 | *
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| 50 | * This file is part of the lwIP TCP/IP stack.
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| 51 | *
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| 52 | * Author: Adam Dunkels <adam@sics.se>
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| 53 | *
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| 54 | */
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| 55 |
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| 56 | #include "lwip/opt.h"
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| 57 |
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| 58 | #if LWIP_IPV4 || LWIP_IPV6
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| 59 |
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| 60 | #include "lwip/ip_addr.h"
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| 61 | #include "lwip/ip.h"
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| 62 |
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| 63 | /** Global data for both IPv4 and IPv6 */
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| 64 | struct ip_globals ip_data;
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| 65 |
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| 66 | #if LWIP_IPV4 && LWIP_IPV6
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| 67 |
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| 68 | const ip_addr_t ip_addr_any_type = IPADDR_ANY_TYPE_INIT;
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| 69 |
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| 70 | /**
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| 71 | * @ingroup ipaddr
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| 72 | * Convert numeric IP address (both versions) into ASCII representation.
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| 73 | * returns ptr to static buffer; not reentrant!
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| 74 | *
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| 75 | * @param addr ip address in network order to convert
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| 76 | * @return pointer to a global static (!) buffer that holds the ASCII
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| 77 | * representation of addr
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| 78 | */
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| 79 | char *ipaddr_ntoa(const ip_addr_t *addr)
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| 80 | {
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| 81 | if (addr == NULL) {
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| 82 | return NULL;
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| 83 | }
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| 84 | if (IP_IS_V6(addr)) {
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| 85 | return ip6addr_ntoa(ip_2_ip6(addr));
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| 86 | } else {
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| 87 | return ip4addr_ntoa(ip_2_ip4(addr));
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| 88 | }
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| 89 | }
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| 90 |
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| 91 | /**
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| 92 | * @ingroup ipaddr
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| 93 | * Same as ipaddr_ntoa, but reentrant since a user-supplied buffer is used.
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| 94 | *
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| 95 | * @param addr ip address in network order to convert
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| 96 | * @param buf target buffer where the string is stored
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| 97 | * @param buflen length of buf
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| 98 | * @return either pointer to buf which now holds the ASCII
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| 99 | * representation of addr or NULL if buf was too small
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| 100 | */
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| 101 | char *ipaddr_ntoa_r(const ip_addr_t *addr, char *buf, int buflen)
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| 102 | {
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| 103 | if (addr == NULL) {
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| 104 | return NULL;
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| 105 | }
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| 106 | if (IP_IS_V6(addr)) {
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| 107 | return ip6addr_ntoa_r(ip_2_ip6(addr), buf, buflen);
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| 108 | } else {
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| 109 | return ip4addr_ntoa_r(ip_2_ip4(addr), buf, buflen);
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| 110 | }
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| 111 | }
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| 112 |
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| 113 | /**
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| 114 | * @ingroup ipaddr
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| 115 | * Convert IP address string (both versions) to numeric.
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| 116 | * The version is auto-detected from the string.
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| 117 | *
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| 118 | * @param cp IP address string to convert
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| 119 | * @param addr conversion result is stored here
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| 120 | * @return 1 on success, 0 on error
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| 121 | */
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| 122 | int
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| 123 | ipaddr_aton(const char *cp, ip_addr_t *addr)
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| 124 | {
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| 125 | if (cp != NULL) {
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| 126 | const char *c;
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| 127 | for (c = cp; *c != 0; c++) {
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| 128 | if (*c == ':') {
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| 129 | /* contains a colon: IPv6 address */
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| 130 | if (addr) {
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| 131 | IP_SET_TYPE_VAL(*addr, IPADDR_TYPE_V6);
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| 132 | }
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| 133 | return ip6addr_aton(cp, ip_2_ip6(addr));
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| 134 | } else if (*c == '.') {
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| 135 | /* contains a dot: IPv4 address */
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| 136 | break;
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| 137 | }
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| 138 | }
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| 139 | /* call ip4addr_aton as fallback or if IPv4 was found */
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| 140 | if (addr) {
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| 141 | IP_SET_TYPE_VAL(*addr, IPADDR_TYPE_V4);
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| 142 | }
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| 143 | return ip4addr_aton(cp, ip_2_ip4(addr));
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| 144 | }
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| 145 | return 0;
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| 146 | }
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| 147 |
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| 148 | /**
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| 149 | * @ingroup lwip_nosys
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| 150 | * If both IP versions are enabled, this function can dispatch packets to the correct one.
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| 151 | * Don't call directly, pass to netif_add() and call netif->input().
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| 152 | */
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| 153 | err_t
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| 154 | ip_input(struct pbuf *p, struct netif *inp)
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| 155 | {
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| 156 | if (p != NULL) {
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| 157 | if (IP_HDR_GET_VERSION(p->payload) == 6) {
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| 158 | return ip6_input(p, inp);
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| 159 | }
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| 160 | return ip4_input(p, inp);
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| 161 | }
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| 162 | return ERR_VAL;
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| 163 | }
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| 164 |
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| 165 | #endif /* LWIP_IPV4 && LWIP_IPV6 */
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| 166 |
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| 167 | #endif /* LWIP_IPV4 || LWIP_IPV6 */
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