1 | /*
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2 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without modification,
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6 | * are permitted provided that the following conditions are met:
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7 | *
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8 | * 1. Redistributions of source code must retain the above copyright notice,
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9 | * this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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11 | * this list of conditions and the following disclaimer in the documentation
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12 | * and/or other materials provided with the distribution.
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13 | * 3. The name of the author may not be used to endorse or promote products
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14 | * derived from this software without specific prior written permission.
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15 | *
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16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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19 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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21 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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24 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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25 | * OF SUCH DAMAGE.
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26 | *
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27 | * This file is part of the lwIP TCP/IP stack.
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28 | *
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29 | * Author: Adam Dunkels <adam@sics.se>
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30 | *
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31 | */
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32 | #ifndef __LWIP_IP_ADDR_H__
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33 | #define __LWIP_IP_ADDR_H__
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34 |
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35 | #include "lwip/opt.h"
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36 | #include "lwip/def.h"
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37 |
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38 | #ifdef __cplusplus
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39 | extern "C" {
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40 | #endif
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41 |
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42 | /* This is the aligned version of ip_addr_t,
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43 | used as local variable, on the stack, etc. */
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44 | struct ip_addr {
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45 | u32_t addr;
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46 | };
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47 |
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48 | /* This is the packed version of ip_addr_t,
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49 | used in network headers that are itself packed */
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50 | #ifdef PACK_STRUCT_USE_INCLUDES
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51 | # include "arch/bpstruct.h"
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52 | #endif
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53 | PACK_STRUCT_BEGIN
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54 | struct ip_addr_packed {
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55 | PACK_STRUCT_FIELD(u32_t addr);
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56 | } PACK_STRUCT_STRUCT;
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57 | PACK_STRUCT_END
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58 | #ifdef PACK_STRUCT_USE_INCLUDES
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59 | # include "arch/epstruct.h"
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60 | #endif
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61 |
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62 | /** ip_addr_t uses a struct for convenience only, so that the same defines can
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63 | * operate both on ip_addr_t as well as on ip_addr_p_t. */
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64 | typedef struct ip_addr ip_addr_t;
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65 | typedef struct ip_addr_packed ip_addr_p_t;
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66 |
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67 | /*
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68 | * struct ipaddr2 is used in the definition of the ARP packet format in
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69 | * order to support compilers that don't have structure packing.
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70 | */
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71 | #ifdef PACK_STRUCT_USE_INCLUDES
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72 | # include "arch/bpstruct.h"
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73 | #endif
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74 | PACK_STRUCT_BEGIN
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75 | struct ip_addr2 {
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76 | PACK_STRUCT_FIELD(u16_t addrw[2]);
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77 | } PACK_STRUCT_STRUCT;
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78 | PACK_STRUCT_END
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79 | #ifdef PACK_STRUCT_USE_INCLUDES
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80 | # include "arch/epstruct.h"
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81 | #endif
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82 |
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83 | /* Forward declaration to not include netif.h */
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84 | struct netif;
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85 |
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86 | extern const ip_addr_t ip_addr_any;
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87 | extern const ip_addr_t ip_addr_broadcast;
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88 |
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89 | /** IP_ADDR_ can be used as a fixed IP address
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90 | * for the wildcard and the broadcast address
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91 | */
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92 | #define IP_ADDR_ANY ((ip_addr_t *)&ip_addr_any)
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93 | #define IP_ADDR_BROADCAST ((ip_addr_t *)&ip_addr_broadcast)
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94 |
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95 | /** 255.255.255.255 */
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96 | #define IPADDR_NONE ((u32_t)0xffffffffUL)
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97 | /** 127.0.0.1 */
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98 | #define IPADDR_LOOPBACK ((u32_t)0x7f000001UL)
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99 | /** 0.0.0.0 */
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100 | #define IPADDR_ANY ((u32_t)0x00000000UL)
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101 | /** 255.255.255.255 */
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102 | #define IPADDR_BROADCAST ((u32_t)0xffffffffUL)
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103 |
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104 | /* Definitions of the bits in an Internet address integer.
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105 |
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106 | On subnets, host and network parts are found according to
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107 | the subnet mask, not these masks. */
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108 | #define IP_CLASSA(a) ((((u32_t)(a)) & 0x80000000UL) == 0)
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109 | #define IP_CLASSA_NET 0xff000000
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110 | #define IP_CLASSA_NSHIFT 24
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111 | #define IP_CLASSA_HOST (0xffffffff & ~IP_CLASSA_NET)
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112 | #define IP_CLASSA_MAX 128
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113 |
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114 | #define IP_CLASSB(a) ((((u32_t)(a)) & 0xc0000000UL) == 0x80000000UL)
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115 | #define IP_CLASSB_NET 0xffff0000
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116 | #define IP_CLASSB_NSHIFT 16
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117 | #define IP_CLASSB_HOST (0xffffffff & ~IP_CLASSB_NET)
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118 | #define IP_CLASSB_MAX 65536
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119 |
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120 | #define IP_CLASSC(a) ((((u32_t)(a)) & 0xe0000000UL) == 0xc0000000UL)
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121 | #define IP_CLASSC_NET 0xffffff00
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122 | #define IP_CLASSC_NSHIFT 8
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123 | #define IP_CLASSC_HOST (0xffffffff & ~IP_CLASSC_NET)
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124 |
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125 | #define IP_CLASSD(a) (((u32_t)(a) & 0xf0000000UL) == 0xe0000000UL)
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126 | #define IP_CLASSD_NET 0xf0000000 /* These ones aren't really */
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127 | #define IP_CLASSD_NSHIFT 28 /* net and host fields, but */
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128 | #define IP_CLASSD_HOST 0x0fffffff /* routing needn't know. */
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129 | #define IP_MULTICAST(a) IP_CLASSD(a)
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130 |
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131 | #define IP_EXPERIMENTAL(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL)
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132 | #define IP_BADCLASS(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL)
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133 |
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134 | #define IP_LOOPBACKNET 127 /* official! */
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135 |
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136 |
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137 | #if BYTE_ORDER == BIG_ENDIAN
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138 | /** Set an IP address given by the four byte-parts */
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139 | #define IP4_ADDR(ipaddr, a,b,c,d) \
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140 | (ipaddr)->addr = ((u32_t)((a) & 0xff) << 24) | \
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141 | ((u32_t)((b) & 0xff) << 16) | \
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142 | ((u32_t)((c) & 0xff) << 8) | \
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143 | (u32_t)((d) & 0xff)
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144 | #else
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145 | /** Set an IP address given by the four byte-parts.
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146 | Little-endian version that prevents the use of htonl. */
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147 | #define IP4_ADDR(ipaddr, a,b,c,d) \
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148 | (ipaddr)->addr = ((u32_t)((d) & 0xff) << 24) | \
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149 | ((u32_t)((c) & 0xff) << 16) | \
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150 | ((u32_t)((b) & 0xff) << 8) | \
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151 | (u32_t)((a) & 0xff)
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152 | #endif
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153 |
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154 | /** MEMCPY-like copying of IP addresses where addresses are known to be
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155 | * 16-bit-aligned if the port is correctly configured (so a port could define
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156 | * this to copying 2 u16_t's) - no NULL-pointer-checking needed. */
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157 | #ifndef IPADDR2_COPY
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158 | #define IPADDR2_COPY(dest, src) SMEMCPY(dest, src, sizeof(ip_addr_t))
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159 | #endif
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160 |
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161 | /** Copy IP address - faster than ip_addr_set: no NULL check */
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162 | #define ip_addr_copy(dest, src) ((dest).addr = (src).addr)
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163 | /** Safely copy one IP address to another (src may be NULL) */
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164 | #define ip_addr_set(dest, src) ((dest)->addr = \
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165 | ((src) == NULL ? 0 : \
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166 | (src)->addr))
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167 | /** Set complete address to zero */
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168 | #define ip_addr_set_zero(ipaddr) ((ipaddr)->addr = 0)
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169 | /** Set address to IPADDR_ANY (no need for htonl()) */
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170 | #define ip_addr_set_any(ipaddr) ((ipaddr)->addr = IPADDR_ANY)
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171 | /** Set address to loopback address */
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172 | #define ip_addr_set_loopback(ipaddr) ((ipaddr)->addr = PP_HTONL(IPADDR_LOOPBACK))
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173 | /** Safely copy one IP address to another and change byte order
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174 | * from host- to network-order. */
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175 | #define ip_addr_set_hton(dest, src) ((dest)->addr = \
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176 | ((src) == NULL ? 0:\
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177 | htonl((src)->addr)))
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178 | /** IPv4 only: set the IP address given as an u32_t */
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179 | #define ip4_addr_set_u32(dest_ipaddr, src_u32) ((dest_ipaddr)->addr = (src_u32))
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180 | /** IPv4 only: get the IP address as an u32_t */
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181 | #define ip4_addr_get_u32(src_ipaddr) ((src_ipaddr)->addr)
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182 |
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183 | /** Get the network address by combining host address with netmask */
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184 | #define ip_addr_get_network(target, host, netmask) ((target)->addr = ((host)->addr) & ((netmask)->addr))
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185 |
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186 | /**
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187 | * Determine if two address are on the same network.
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188 | *
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189 | * @arg addr1 IP address 1
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190 | * @arg addr2 IP address 2
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191 | * @arg mask network identifier mask
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192 | * @return !0 if the network identifiers of both address match
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193 | */
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194 | #define ip_addr_netcmp(addr1, addr2, mask) (((addr1)->addr & \
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195 | (mask)->addr) == \
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196 | ((addr2)->addr & \
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197 | (mask)->addr))
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198 | #define ip_addr_cmp(addr1, addr2) ((addr1)->addr == (addr2)->addr)
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199 |
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200 | #define ip_addr_isany(addr1) ((addr1) == NULL || (addr1)->addr == IPADDR_ANY)
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201 |
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202 | #define ip_addr_isbroadcast(ipaddr, netif) ip4_addr_isbroadcast((ipaddr)->addr, (netif))
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203 | u8_t ip4_addr_isbroadcast(u32_t addr, const struct netif *netif);
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204 |
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205 | #define ip_addr_netmask_valid(netmask) ip4_addr_netmask_valid((netmask)->addr)
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206 | u8_t ip4_addr_netmask_valid(u32_t netmask);
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207 |
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208 | #define ip_addr_ismulticast(addr1) (((addr1)->addr & PP_HTONL(0xf0000000UL)) == PP_HTONL(0xe0000000UL))
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209 |
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210 | #define ip_addr_islinklocal(addr1) (((addr1)->addr & PP_HTONL(0xffff0000UL)) == PP_HTONL(0xa9fe0000UL))
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211 |
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212 | #define ip_addr_debug_print(debug, ipaddr) \
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213 | LWIP_DEBUGF(debug, ("%"U16_F".%"U16_F".%"U16_F".%"U16_F, \
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214 | ipaddr != NULL ? ip4_addr1_16(ipaddr) : 0, \
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215 | ipaddr != NULL ? ip4_addr2_16(ipaddr) : 0, \
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216 | ipaddr != NULL ? ip4_addr3_16(ipaddr) : 0, \
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217 | ipaddr != NULL ? ip4_addr4_16(ipaddr) : 0))
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218 |
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219 | /* Get one byte from the 4-byte address */
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220 | #define ip4_addr1(ipaddr) (((u8_t*)(ipaddr))[0])
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221 | #define ip4_addr2(ipaddr) (((u8_t*)(ipaddr))[1])
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222 | #define ip4_addr3(ipaddr) (((u8_t*)(ipaddr))[2])
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223 | #define ip4_addr4(ipaddr) (((u8_t*)(ipaddr))[3])
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224 | /* These are cast to u16_t, with the intent that they are often arguments
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225 | * to printf using the U16_F format from cc.h. */
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226 | #define ip4_addr1_16(ipaddr) ((u16_t)ip4_addr1(ipaddr))
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227 | #define ip4_addr2_16(ipaddr) ((u16_t)ip4_addr2(ipaddr))
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228 | #define ip4_addr3_16(ipaddr) ((u16_t)ip4_addr3(ipaddr))
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229 | #define ip4_addr4_16(ipaddr) ((u16_t)ip4_addr4(ipaddr))
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230 |
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231 | /** For backwards compatibility */
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232 | #define ip_ntoa(ipaddr) ipaddr_ntoa(ipaddr)
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233 |
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234 | u32_t ipaddr_addr(const char *cp);
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235 | int ipaddr_aton(const char *cp, ip_addr_t *addr);
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236 | /** returns ptr to static buffer; not reentrant! */
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237 | char *ipaddr_ntoa(const ip_addr_t *addr);
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238 | char *ipaddr_ntoa_r(const ip_addr_t *addr, char *buf, int buflen);
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239 |
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240 | #ifdef __cplusplus
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241 | }
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242 | #endif
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243 |
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244 | #endif /* __LWIP_IP_ADDR_H__ */
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