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
ipaddr_aton(const char * cp,ip_addr_t * addr)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
ip_input(struct pbuf * p,struct netif * inp)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 */
125