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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