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[netwatch.git] / lwip / src / include / ipv4 / lwip / ip_addr.h
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1/*
2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
25 * OF SUCH DAMAGE.
26 *
27 * This file is part of the lwIP TCP/IP stack.
28 *
29 * Author: Adam Dunkels <adam@sics.se>
30 *
31 */
32#ifndef __LWIP_IP_ADDR_H__
33#define __LWIP_IP_ADDR_H__
34
35#include "lwip/opt.h"
36
37#ifdef __cplusplus
38extern "C" {
39#endif
40
41#ifdef PACK_STRUCT_USE_INCLUDES
42# include "arch/bpstruct.h"
43#endif
44PACK_STRUCT_BEGIN
45struct ip_addr {
46 PACK_STRUCT_FIELD(u32_t addr);
47} PACK_STRUCT_STRUCT;
48PACK_STRUCT_END
49#ifdef PACK_STRUCT_USE_INCLUDES
50# include "arch/epstruct.h"
51#endif
52
53/*
54 * struct ipaddr2 is used in the definition of the ARP packet format in
55 * order to support compilers that don't have structure packing.
56 */
57#ifdef PACK_STRUCT_USE_INCLUDES
58# include "arch/bpstruct.h"
59#endif
60PACK_STRUCT_BEGIN
61struct ip_addr2 {
62 PACK_STRUCT_FIELD(u16_t addrw[2]);
63} PACK_STRUCT_STRUCT;
64PACK_STRUCT_END
65#ifdef PACK_STRUCT_USE_INCLUDES
66# include "arch/epstruct.h"
67#endif
68
69/* For compatibility with BSD code */
70struct in_addr {
71 u32_t s_addr;
72};
73
74struct netif;
75
76extern const struct ip_addr ip_addr_any;
77extern const struct ip_addr ip_addr_broadcast;
78
79/** IP_ADDR_ can be used as a fixed IP address
80 * for the wildcard and the broadcast address
81 */
82#define IP_ADDR_ANY ((struct ip_addr *)&ip_addr_any)
83#define IP_ADDR_BROADCAST ((struct ip_addr *)&ip_addr_broadcast)
84
85#define INADDR_NONE ((u32_t)0xffffffffUL) /* 255.255.255.255 */
86#define INADDR_LOOPBACK ((u32_t)0x7f000001UL) /* 127.0.0.1 */
87
88/* Definitions of the bits in an Internet address integer.
89
90 On subnets, host and network parts are found according to
91 the subnet mask, not these masks. */
92
93#define IN_CLASSA(a) ((((u32_t)(a)) & 0x80000000UL) == 0)
94#define IN_CLASSA_NET 0xff000000
95#define IN_CLASSA_NSHIFT 24
96#define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
97#define IN_CLASSA_MAX 128
98
99#define IN_CLASSB(a) ((((u32_t)(a)) & 0xc0000000UL) == 0x80000000UL)
100#define IN_CLASSB_NET 0xffff0000
101#define IN_CLASSB_NSHIFT 16
102#define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
103#define IN_CLASSB_MAX 65536
104
105#define IN_CLASSC(a) ((((u32_t)(a)) & 0xe0000000UL) == 0xc0000000UL)
106#define IN_CLASSC_NET 0xffffff00
107#define IN_CLASSC_NSHIFT 8
108#define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
109
110#define IN_CLASSD(a) (((u32_t)(a) & 0xf0000000UL) == 0xe0000000UL)
111#define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */
112#define IN_CLASSD_NSHIFT 28 /* net and host fields, but */
113#define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */
114#define IN_MULTICAST(a) IN_CLASSD(a)
115
116#define IN_EXPERIMENTAL(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL)
117#define IN_BADCLASS(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL)
118
119#define IN_LOOPBACKNET 127 /* official! */
120
121#define IP4_ADDR(ipaddr, a,b,c,d) \
122 (ipaddr)->addr = htonl(((u32_t)((a) & 0xff) << 24) | \
123 ((u32_t)((b) & 0xff) << 16) | \
124 ((u32_t)((c) & 0xff) << 8) | \
125 (u32_t)((d) & 0xff))
126
127#define ip_addr_set(dest, src) (dest)->addr = \
128 ((src) == NULL? 0:\
129 (src)->addr)
130/**
131 * Determine if two address are on the same network.
132 *
133 * @arg addr1 IP address 1
134 * @arg addr2 IP address 2
135 * @arg mask network identifier mask
136 * @return !0 if the network identifiers of both address match
137 */
138#define ip_addr_netcmp(addr1, addr2, mask) (((addr1)->addr & \
139 (mask)->addr) == \
140 ((addr2)->addr & \
141 (mask)->addr))
142#define ip_addr_cmp(addr1, addr2) ((addr1)->addr == (addr2)->addr)
143
144#define ip_addr_isany(addr1) ((addr1) == NULL || (addr1)->addr == 0)
145
146u8_t ip_addr_isbroadcast(struct ip_addr *, struct netif *);
147
148#define ip_addr_ismulticast(addr1) (((addr1)->addr & ntohl(0xf0000000UL)) == ntohl(0xe0000000UL))
149
150#define ip_addr_islinklocal(addr1) (((addr1)->addr & ntohl(0xffff0000UL)) == ntohl(0xa9fe0000UL))
151
152#define ip_addr_debug_print(debug, ipaddr) \
153 LWIP_DEBUGF(debug, ("%"U16_F".%"U16_F".%"U16_F".%"U16_F, \
154 ipaddr ? (u16_t)(ntohl((ipaddr)->addr) >> 24) & 0xff : 0, \
155 ipaddr ? (u16_t)(ntohl((ipaddr)->addr) >> 16) & 0xff : 0, \
156 ipaddr ? (u16_t)(ntohl((ipaddr)->addr) >> 8) & 0xff : 0, \
157 ipaddr ? (u16_t)ntohl((ipaddr)->addr) & 0xff : 0))
158
159/* These are cast to u16_t, with the intent that they are often arguments
160 * to printf using the U16_F format from cc.h. */
161#define ip4_addr1(ipaddr) ((u16_t)(ntohl((ipaddr)->addr) >> 24) & 0xff)
162#define ip4_addr2(ipaddr) ((u16_t)(ntohl((ipaddr)->addr) >> 16) & 0xff)
163#define ip4_addr3(ipaddr) ((u16_t)(ntohl((ipaddr)->addr) >> 8) & 0xff)
164#define ip4_addr4(ipaddr) ((u16_t)(ntohl((ipaddr)->addr)) & 0xff)
165
166#ifdef __cplusplus
167}
168#endif
169
170#endif /* __LWIP_IP_ADDR_H__ */
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