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 #if defined (__cplusplus) && __cplusplus 46 extern "C" { 47 #endif 48 49 50 /** 51 * @cond liteos This is the aligned version of ip4_addr_t, 52 used as local variable, on the stack, etc. 53 * @endcond */ 54 struct ip4_addr { 55 u32_t addr; 56 }; 57 58 /** ip4_addr_t uses a struct for convenience only, so that the same defines can 59 * operate both on ip4_addr_t as well as on ip4_addr_p_t. */ 60 typedef struct ip4_addr ip4_addr_t; 61 62 /* Forward declaration to not include netif.h */ 63 struct netif; 64 65 /** 255.255.255.255 */ 66 #define IPADDR_NONE ((u32_t)0xffffffffUL) 67 /** 127.0.0.1 */ 68 #define IPADDR_LOOPBACK ((u32_t)0x7f000001UL) 69 /** 0.0.0.0 */ 70 #define IPADDR_ANY ((u32_t)0x00000000UL) 71 /** 255.255.255.255 */ 72 #define IPADDR_BROADCAST ((u32_t)0xffffffffUL) 73 74 /* Definitions of the bits in an Internet address integer. 75 76 On subnets, host and network parts are found according to 77 the subnet mask, not these masks. */ 78 #define IP_CLASSA(a) ((((u32_t)(a)) & 0x80000000UL) == 0) 79 #define IP_CLASSA_NET 0xff000000 80 #define IP_CLASSA_NSHIFT 24 81 #define IP_CLASSA_HOST (0xffffffff & ~IP_CLASSA_NET) 82 #define IP_CLASSA_MAX 128 83 84 #define IP_CLASSB(a) ((((u32_t)(a)) & 0xc0000000UL) == 0x80000000UL) 85 #define IP_CLASSB_NET 0xffff0000 86 #define IP_CLASSB_NSHIFT 16 87 #define IP_CLASSB_HOST (0xffffffff & ~IP_CLASSB_NET) 88 #define IP_CLASSB_MAX 65536 89 90 #define IP_CLASSC(a) ((((u32_t)(a)) & 0xe0000000UL) == 0xc0000000UL) 91 #define IP_CLASSC_NET 0xffffff00 92 #define IP_CLASSC_NSHIFT 8 93 #define IP_CLASSC_HOST (0xffffffff & ~IP_CLASSC_NET) 94 95 #define IP_CLASSD(a) (((u32_t)(a) & 0xf0000000UL) == 0xe0000000UL) 96 #define IP_CLASSD_NET 0xf0000000 /* These ones aren't really */ 97 #define IP_CLASSD_NSHIFT 28 /* net and host fields, but */ 98 #define IP_CLASSD_HOST 0x0fffffff /* routing needn't know. */ 99 #define IP_MULTICAST(a) IP_CLASSD(a) 100 101 #define IP_EXPERIMENTAL(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL) 102 #define IP_BADCLASS(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL) 103 104 #define IP_LOOPBACKNET 127 /* official! */ 105 106 /** Set an IP address given by the four byte-parts */ 107 #define IP4_ADDR(ipaddr, a, b, c, d) (ipaddr)->addr = PP_HTONL(LWIP_MAKEU32(a, b, c, d)) 108 109 /** Copy IP address - faster than ip4_addr_set: no NULL check */ 110 #define ip4_addr_copy(dest, src) ((dest).addr = (src).addr) 111 /** Safely copy one IP address to another (src may be NULL) */ 112 #define ip4_addr_set(dest, src) ((dest)->addr = ((src) == NULL ? 0 : (src)->addr)) 113 /** Set complete address to zero */ 114 #define ip4_addr_set_zero(ipaddr) ((ipaddr)->addr = 0) 115 /** Set address to IPADDR_ANY (no need for lwip_htonl()) */ 116 #define ip4_addr_set_any(ipaddr) ((ipaddr)->addr = IPADDR_ANY) 117 /** Set address to loopback address */ 118 #define ip4_addr_set_loopback(ipaddr) ((ipaddr)->addr = PP_HTONL(IPADDR_LOOPBACK)) 119 /** Check if an address is in the loopback region */ 120 #define ip4_addr_isloopback(ipaddr) (((ipaddr)->addr & PP_HTONL(IP_CLASSA_NET)) == \ 121 PP_HTONL(((u32_t)IP_LOOPBACKNET) << 24)) 122 /** Safely copy one IP address to another and change byte order 123 * from host- to network-order. */ 124 #define ip4_addr_set_hton(dest, src) ((dest)->addr = ((src) == NULL ? 0 : 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 { \ 132 ((target)->addr = ((host)->addr) & ((netmask)->addr)); } while (0) 133 134 /** 135 * Determine if two address are on the same network. 136 * 137 * @arg addr1 IP address 1 138 * @arg addr2 IP address 2 139 * @arg mask network identifier mask 140 * @return !0 if the network identifiers of both address match 141 */ 142 #define ip4_addr_netcmp(addr1, addr2, mask) (((addr1)->addr & \ 143 (mask)->addr) == \ 144 ((addr2)->addr & \ 145 (mask)->addr)) 146 #define ip4_addr_cmp(addr1, addr2) ((addr1)->addr == (addr2)->addr) 147 148 #define ip4_addr_isany_val(addr1) ((addr1).addr == IPADDR_ANY) 149 #define ip4_addr_isnone_val(addr1) ((addr1).addr == IPADDR_NONE) 150 #define ip4_addr_isany(addr1) ((addr1) == NULL || ip4_addr_isany_val(*(addr1))) 151 #define ip4_addr_isnone(addr1) ((addr1) == NULL || ip4_addr_isnone_val(*(addr1))) 152 #define ip4_addr_isbroadcast(addr1, netif) ip4_addr_isbroadcast_u32((addr1)->addr, netif) 153 u8_t ip4_addr_isbroadcast_u32(u32_t addr, const struct netif *netif); 154 155 #if LWIP_ENABLE_LOS_SHELL_CMD || LWIP_IOCTL_IF || LWIP_ENABLE_BASIC_SHELL_CMD 156 #define ip_addr_netmask_valid(netmask) ip4_addr_netmask_valid((netmask)->addr) 157 u8_t ip4_addr_netmask_valid(u32_t netmask); 158 #endif 159 160 #define ip4_addr_ismulticast(addr1) (((addr1)->addr & PP_HTONL(0xf0000000UL)) == PP_HTONL(0xe0000000UL)) 161 162 #define ip4_addr_islinklocal(addr1) (((addr1)->addr & PP_HTONL(0xffff0000UL)) == PP_HTONL(0xa9fe0000UL)) 163 164 #ifdef LWIP_DEBUG 165 #define ip4_addr_debug_print_parts(debug, a, b, c, d) \ 166 LWIP_DEBUGF(debug, ("%" U16_F ".%" U16_F ".%" U16_F ".%" U16_F, a, b, c, d)) 167 #define ip4_addr_debug_print(debug, ipaddr) \ 168 ip4_addr_debug_print_parts(debug, \ 169 (u16_t)((ipaddr) != NULL ? ip4_addr1_16(ipaddr) : 0), \ 170 (u16_t)((ipaddr) != NULL ? ip4_addr2_16(ipaddr) : 0), \ 171 (u16_t)((ipaddr) != NULL ? ip4_addr3_16(ipaddr) : 0), \ 172 (u16_t)((ipaddr) != NULL ? ip4_addr4_16(ipaddr) : 0)) 173 #define ip4_addr_debug_print_val(debug, ipaddr) \ 174 ip4_addr_debug_print_parts(debug, \ 175 ip4_addr1_16_val(ipaddr), \ 176 ip4_addr2_16_val(ipaddr), \ 177 ip4_addr3_16_val(ipaddr), \ 178 ip4_addr4_16_val(ipaddr)) 179 #else 180 #define ip4_addr_debug_print_parts(debug, a, b, c, d) 181 #define ip4_addr_debug_print(debug, ipaddr) 182 #define ip4_addr_debug_print_val(debug, ipaddr) 183 #endif 184 185 186 /* Get one byte from the 4-byte address */ 187 #define ip4_addr_get_byte(ipaddr, idx) (((const u8_t*)(&(ipaddr)->addr))[idx]) 188 #define ip4_addr1(ipaddr) ip4_addr_get_byte(ipaddr, 0) 189 #define ip4_addr2(ipaddr) ip4_addr_get_byte(ipaddr, 1) 190 #define ip4_addr3(ipaddr) ip4_addr_get_byte(ipaddr, 2) 191 #define ip4_addr4(ipaddr) ip4_addr_get_byte(ipaddr, 3) 192 /* Get one byte from the 4-byte address, but argument is 'ip4_addr_t', 193 * not a pointer */ 194 #define ip4_addr_get_byte_val(ipaddr, idx) ((u8_t)(((ipaddr).addr >> (idx * 8)) & 0xff)) 195 #define ip4_addr1_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 0) 196 #define ip4_addr2_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 1) 197 #define ip4_addr3_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 2) 198 #define ip4_addr4_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 3) 199 /* These are cast to u16_t, with the intent that they are often arguments 200 * to printf using the U16_F format from cc.h. */ 201 #define ip4_addr1_16(ipaddr) ((u16_t)ip4_addr1(ipaddr)) 202 #define ip4_addr2_16(ipaddr) ((u16_t)ip4_addr2(ipaddr)) 203 #define ip4_addr3_16(ipaddr) ((u16_t)ip4_addr3(ipaddr)) 204 #define ip4_addr4_16(ipaddr) ((u16_t)ip4_addr4(ipaddr)) 205 #define ip4_addr1_16_val(ipaddr) ((u16_t)ip4_addr1_val(ipaddr)) 206 #define ip4_addr2_16_val(ipaddr) ((u16_t)ip4_addr2_val(ipaddr)) 207 #define ip4_addr3_16_val(ipaddr) ((u16_t)ip4_addr3_val(ipaddr)) 208 #define ip4_addr4_16_val(ipaddr) ((u16_t)ip4_addr4_val(ipaddr)) 209 210 #define IP4ADDR_STRLEN_MAX 16 211 #define IP4ADDR_STR_PARTS 4 212 213 /** For backwards compatibility */ 214 #define ip_ntoa(ipaddr) ipaddr_ntoa(ipaddr) 215 216 u32_t ipaddr_addr(const char *cp); 217 int ip4addr_aton(const char *cp, ip4_addr_t *addr); 218 /** returns ptr to static buffer; not reentrant! */ 219 char *ip4addr_ntoa(const ip4_addr_t *addr); 220 char *ip4addr_ntoa_r(const ip4_addr_t *addr, char *buf, int buflen); 221 222 int inet_pton4(const char *src, unsigned char *dst); 223 const char *lwip_inet_ntop4(const unsigned char *src, char *dst, u32_t size); 224 225 #if defined (__cplusplus) && __cplusplus 226 } 227 #endif 228 229 #endif /* LWIP_IPV4 */ 230 231 #endif /* LWIP_HDR_IP_ADDR_H */ 232