1 /** 2 * @file 3 * IPv4 address API 4 */ 5 6 /* 7 * Copyright (c) 2001-2004 Swedish Institute of Computer Science. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without modification, 11 * are permitted provided that the following conditions are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright notice, 14 * this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 24 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 26 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 29 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 30 * OF SUCH DAMAGE. 31 * 32 * This file is part of the lwIP TCP/IP stack. 33 * 34 * Author: Adam Dunkels <adam@sics.se> 35 * 36 */ 37 #ifndef LWIP_HDR_IP4_ADDR_H 38 #define LWIP_HDR_IP4_ADDR_H 39 40 #include "lwip/opt.h" 41 #include "lwip/def.h" 42 43 #if LWIP_IPV4 44 45 #ifdef __cplusplus 46 extern "C" { 47 #endif 48 49 /** This is the aligned version of ip4_addr_t, 50 used as local variable, on the stack, etc. */ 51 struct ip4_addr { 52 u32_t addr; 53 }; 54 55 /** ip4_addr_t uses a struct for convenience only, so that the same defines can 56 * operate both on ip4_addr_t as well as on ip4_addr_p_t. */ 57 typedef struct ip4_addr ip4_addr_t; 58 59 /* Forward declaration to not include netif.h */ 60 struct netif; 61 62 /** 255.255.255.255 */ 63 #define IPADDR_NONE ((u32_t)0xffffffffUL) 64 /** 127.0.0.1 */ 65 #define IPADDR_LOOPBACK ((u32_t)0x7f000001UL) 66 /** 0.0.0.0 */ 67 #define IPADDR_ANY ((u32_t)0x00000000UL) 68 /** 255.255.255.255 */ 69 #define IPADDR_BROADCAST ((u32_t)0xffffffffUL) 70 71 /* Definitions of the bits in an Internet address integer. 72 73 On subnets, host and network parts are found according to 74 the subnet mask, not these masks. */ 75 #define IP_CLASSA(a) ((((u32_t)(a)) & 0x80000000UL) == 0) 76 #define IP_CLASSA_NET 0xff000000 77 #define IP_CLASSA_NSHIFT 24 78 #define IP_CLASSA_HOST (0xffffffff & ~IP_CLASSA_NET) 79 #define IP_CLASSA_MAX 128 80 81 #define IP_CLASSB(a) ((((u32_t)(a)) & 0xc0000000UL) == 0x80000000UL) 82 #define IP_CLASSB_NET 0xffff0000 83 #define IP_CLASSB_NSHIFT 16 84 #define IP_CLASSB_HOST (0xffffffff & ~IP_CLASSB_NET) 85 #define IP_CLASSB_MAX 65536 86 87 #define IP_CLASSC(a) ((((u32_t)(a)) & 0xe0000000UL) == 0xc0000000UL) 88 #define IP_CLASSC_NET 0xffffff00 89 #define IP_CLASSC_NSHIFT 8 90 #define IP_CLASSC_HOST (0xffffffff & ~IP_CLASSC_NET) 91 92 #define IP_CLASSD(a) (((u32_t)(a) & 0xf0000000UL) == 0xe0000000UL) 93 #define IP_CLASSD_NET 0xf0000000 /* These ones aren't really */ 94 #define IP_CLASSD_NSHIFT 28 /* net and host fields, but */ 95 #define IP_CLASSD_HOST 0x0fffffff /* routing needn't know. */ 96 #define IP_MULTICAST(a) IP_CLASSD(a) 97 98 #define IP_EXPERIMENTAL(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL) 99 #define IP_BADCLASS(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL) 100 101 #define IP_LOOPBACKNET 127 /* official! */ 102 103 /** Set an IP address given by the four byte-parts */ 104 #define IP4_ADDR(ipaddr, a,b,c,d) (ipaddr)->addr = PP_HTONL(LWIP_MAKEU32(a,b,c,d)) 105 106 /** Copy IP address - faster than ip4_addr_set: no NULL check */ 107 #define ip4_addr_copy(dest, src) ((dest).addr = (src).addr) 108 /** Safely copy one IP address to another (src may be NULL) */ 109 #define ip4_addr_set(dest, src) ((dest)->addr = \ 110 ((src) == NULL ? 0 : \ 111 (src)->addr)) 112 /** Set complete address to zero */ 113 #define ip4_addr_set_zero(ipaddr) ((ipaddr)->addr = 0) 114 /** Set address to IPADDR_ANY (no need for lwip_htonl()) */ 115 #define ip4_addr_set_any(ipaddr) ((ipaddr)->addr = IPADDR_ANY) 116 /** Set address to loopback address */ 117 #define ip4_addr_set_loopback(ipaddr) ((ipaddr)->addr = PP_HTONL(IPADDR_LOOPBACK)) 118 /** Check if an address is in the loopback region */ 119 #define ip4_addr_isloopback(ipaddr) (((ipaddr)->addr & PP_HTONL(IP_CLASSA_NET)) == PP_HTONL(((u32_t)IP_LOOPBACKNET) << 24)) 120 /** Safely copy one IP address to another and change byte order 121 * from host- to network-order. */ 122 #define ip4_addr_set_hton(dest, src) ((dest)->addr = \ 123 ((src) == NULL ? 0:\ 124 lwip_htonl((src)->addr))) 125 /** IPv4 only: set the IP address given as an u32_t */ 126 #define ip4_addr_set_u32(dest_ipaddr, src_u32) ((dest_ipaddr)->addr = (src_u32)) 127 /** IPv4 only: get the IP address as an u32_t */ 128 #define ip4_addr_get_u32(src_ipaddr) ((src_ipaddr)->addr) 129 130 /** Get the network address by combining host address with netmask */ 131 #define ip4_addr_get_network(target, host, netmask) do { ((target)->addr = ((host)->addr) & ((netmask)->addr)); } while(0) 132 133 /** 134 * Determine if two address are on the same network. 135 * 136 * @arg addr1 IP address 1 137 * @arg addr2 IP address 2 138 * @arg mask network identifier mask 139 * @return !0 if the network identifiers of both address match 140 */ 141 #define ip4_addr_netcmp(addr1, addr2, mask) (((addr1)->addr & \ 142 (mask)->addr) == \ 143 ((addr2)->addr & \ 144 (mask)->addr)) 145 #define ip4_addr_cmp(addr1, addr2) ((addr1)->addr == (addr2)->addr) 146 147 #define ip4_addr_isany_val(addr1) ((addr1).addr == IPADDR_ANY) 148 #define ip4_addr_isany(addr1) ((addr1) == NULL || ip4_addr_isany_val(*(addr1))) 149 150 #define ip4_addr_isbroadcast(addr1, netif) ip4_addr_isbroadcast_u32((addr1)->addr, netif) 151 u8_t ip4_addr_isbroadcast_u32(u32_t addr, const struct netif *netif); 152 153 #define ip_addr_netmask_valid(netmask) ip4_addr_netmask_valid((netmask)->addr) 154 u8_t ip4_addr_netmask_valid(u32_t netmask); 155 156 #define ip4_addr_ismulticast(addr1) (((addr1)->addr & PP_HTONL(0xf0000000UL)) == PP_HTONL(0xe0000000UL)) 157 158 #define ip4_addr_islinklocal(addr1) (((addr1)->addr & PP_HTONL(0xffff0000UL)) == PP_HTONL(0xa9fe0000UL)) 159 160 #define ip4_addr_debug_print_parts(debug, a, b, c, d) \ 161 LWIP_DEBUGF(debug, ("%" U16_F ".%" U16_F ".%" U16_F ".%" U16_F, a, b, c, d)) 162 #define ip4_addr_debug_print(debug, ipaddr) \ 163 ip4_addr_debug_print_parts(debug, \ 164 (u16_t)((ipaddr) != NULL ? ip4_addr1_16(ipaddr) : 0), \ 165 (u16_t)((ipaddr) != NULL ? ip4_addr2_16(ipaddr) : 0), \ 166 (u16_t)((ipaddr) != NULL ? ip4_addr3_16(ipaddr) : 0), \ 167 (u16_t)((ipaddr) != NULL ? ip4_addr4_16(ipaddr) : 0)) 168 #define ip4_addr_debug_print_val(debug, ipaddr) \ 169 ip4_addr_debug_print_parts(debug, \ 170 ip4_addr1_16(&(ipaddr)), \ 171 ip4_addr2_16(&(ipaddr)), \ 172 ip4_addr3_16(&(ipaddr)), \ 173 ip4_addr4_16(&(ipaddr))) 174 175 /* Get one byte from the 4-byte address */ 176 #define ip4_addr1(ipaddr) (((const u8_t*)(&(ipaddr)->addr))[0]) 177 #define ip4_addr2(ipaddr) (((const u8_t*)(&(ipaddr)->addr))[1]) 178 #define ip4_addr3(ipaddr) (((const u8_t*)(&(ipaddr)->addr))[2]) 179 #define ip4_addr4(ipaddr) (((const u8_t*)(&(ipaddr)->addr))[3]) 180 /* These are cast to u16_t, with the intent that they are often arguments 181 * to printf using the U16_F format from cc.h. */ 182 #define ip4_addr1_16(ipaddr) ((u16_t)ip4_addr1(ipaddr)) 183 #define ip4_addr2_16(ipaddr) ((u16_t)ip4_addr2(ipaddr)) 184 #define ip4_addr3_16(ipaddr) ((u16_t)ip4_addr3(ipaddr)) 185 #define ip4_addr4_16(ipaddr) ((u16_t)ip4_addr4(ipaddr)) 186 187 #define IP4ADDR_STRLEN_MAX 16 188 189 /** For backwards compatibility */ 190 #define ip_ntoa(ipaddr) ipaddr_ntoa(ipaddr) 191 192 u32_t ipaddr_addr(const char *cp); 193 int ip4addr_aton(const char *cp, ip4_addr_t *addr); 194 /** returns ptr to static buffer; not reentrant! */ 195 char *ip4addr_ntoa(const ip4_addr_t *addr); 196 char *ip4addr_ntoa_r(const ip4_addr_t *addr, char *buf, int buflen); 197 198 #ifdef __cplusplus 199 } 200 #endif 201 202 #endif /* LWIP_IPV4 */ 203 204 #endif /* LWIP_HDR_IP_ADDR_H */ 205