/** * @file * IPv4 address API */ /* * Copyright (c) 2001-2004 Swedish Institute of Computer Science. * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY * OF SUCH DAMAGE. * * This file is part of the lwIP TCP/IP stack. * * Author: Adam Dunkels * */ #ifndef LWIP_HDR_IP4_ADDR_H #define LWIP_HDR_IP4_ADDR_H #include "lwip/opt.h" #include "lwip/def.h" #if LWIP_IPV4 #ifdef __cplusplus extern "C" { #endif /** This is the aligned version of ip4_addr_t, used as local variable, on the stack, etc. */ struct ip4_addr { u32_t addr; }; /** ip4_addr_t uses a struct for convenience only, so that the same defines can * operate both on ip4_addr_t as well as on ip4_addr_p_t. */ typedef struct ip4_addr ip4_addr_t; /* Forward declaration to not include netif.h */ struct netif; /** 255.255.255.255 */ #define IPADDR_NONE ((u32_t)0xffffffffUL) /** 127.0.0.1 */ #define IPADDR_LOOPBACK ((u32_t)0x7f000001UL) /** 0.0.0.0 */ #define IPADDR_ANY ((u32_t)0x00000000UL) /** 255.255.255.255 */ #define IPADDR_BROADCAST ((u32_t)0xffffffffUL) /* Definitions of the bits in an Internet address integer. On subnets, host and network parts are found according to the subnet mask, not these masks. */ #define IP_CLASSA(a) ((((u32_t)(a)) & 0x80000000UL) == 0) #define IP_CLASSA_NET 0xff000000 #define IP_CLASSA_NSHIFT 24 #define IP_CLASSA_HOST (0xffffffff & ~IP_CLASSA_NET) #define IP_CLASSA_MAX 128 #define IP_CLASSB(a) ((((u32_t)(a)) & 0xc0000000UL) == 0x80000000UL) #define IP_CLASSB_NET 0xffff0000 #define IP_CLASSB_NSHIFT 16 #define IP_CLASSB_HOST (0xffffffff & ~IP_CLASSB_NET) #define IP_CLASSB_MAX 65536 #define IP_CLASSC(a) ((((u32_t)(a)) & 0xe0000000UL) == 0xc0000000UL) #define IP_CLASSC_NET 0xffffff00 #define IP_CLASSC_NSHIFT 8 #define IP_CLASSC_HOST (0xffffffff & ~IP_CLASSC_NET) #define IP_CLASSD(a) (((u32_t)(a) & 0xf0000000UL) == 0xe0000000UL) #define IP_CLASSD_NET 0xf0000000 /* These ones aren't really */ #define IP_CLASSD_NSHIFT 28 /* net and host fields, but */ #define IP_CLASSD_HOST 0x0fffffff /* routing needn't know. */ #define IP_MULTICAST(a) IP_CLASSD(a) #define IP_EXPERIMENTAL(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL) #define IP_BADCLASS(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL) #define IP_LOOPBACKNET 127 /* official! */ /** Set an IP address given by the four byte-parts */ #define IP4_ADDR(ipaddr, a,b,c,d) (ipaddr)->addr = PP_HTONL(LWIP_MAKEU32(a,b,c,d)) /** Copy IP address - faster than ip4_addr_set: no NULL check */ #define ip4_addr_copy(dest, src) MEMCPY(&((dest).addr), &((src).addr), 4) /** Safely copy one IP address to another (src may be NULL) */ #define ip4_addr_set(dest, src) ((dest)->addr = \ ((src) == NULL ? 0 : \ (src)->addr)) /** Set complete address to zero */ #define ip4_addr_set_zero(ipaddr) ((ipaddr)->addr = 0) /** Set address to IPADDR_ANY (no need for lwip_htonl()) */ #define ip4_addr_set_any(ipaddr) ((ipaddr)->addr = IPADDR_ANY) /** Set address to loopback address */ #define ip4_addr_set_loopback(ipaddr) ((ipaddr)->addr = PP_HTONL(IPADDR_LOOPBACK)) /** Check if an address is in the loopback region */ #define ip4_addr_isloopback(ipaddr) (((ipaddr)->addr & PP_HTONL(IP_CLASSA_NET)) == PP_HTONL(((u32_t)IP_LOOPBACKNET) << 24)) /** Safely copy one IP address to another and change byte order * from host- to network-order. */ #define ip4_addr_set_hton(dest, src) ((dest)->addr = \ ((src) == NULL ? 0:\ lwip_htonl((src)->addr))) /** IPv4 only: set the IP address given as an u32_t */ #define ip4_addr_set_u32(dest_ipaddr, src_u32) ((dest_ipaddr)->addr = (src_u32)) /** IPv4 only: get the IP address as an u32_t */ #define ip4_addr_get_u32(src_ipaddr) ((src_ipaddr)->addr) /** Get the network address by combining host address with netmask */ #define ip4_addr_get_network(target, host, netmask) do { ((target)->addr = ((host)->addr) & ((netmask)->addr)); } while(0) /** * Determine if two address are on the same network. * * @arg addr1 IP address 1 * @arg addr2 IP address 2 * @arg mask network identifier mask * @return !0 if the network identifiers of both address match */ #define ip4_addr_netcmp(addr1, addr2, mask) (((addr1)->addr & \ (mask)->addr) == \ ((addr2)->addr & \ (mask)->addr)) #define ip4_addr_cmp(addr1, addr2) ((addr1)->addr == (addr2)->addr) #define ip4_addr_isany_val(addr1) ((addr1).addr == IPADDR_ANY) #define ip4_addr_isany(addr1) ((addr1) == NULL || ip4_addr_isany_val(*(addr1))) #define ip4_addr_isbroadcast(addr1, netif) ip4_addr_isbroadcast_u32((addr1)->addr, netif) u8_t ip4_addr_isbroadcast_u32(u32_t addr, const struct netif *netif); #define ip_addr_netmask_valid(netmask) ip4_addr_netmask_valid((netmask)->addr) u8_t ip4_addr_netmask_valid(u32_t netmask); #define ip4_addr_ismulticast(addr1) (((addr1)->addr & PP_HTONL(0xf0000000UL)) == PP_HTONL(0xe0000000UL)) #define ip4_addr_islinklocal(addr1) (((addr1)->addr & PP_HTONL(0xffff0000UL)) == PP_HTONL(0xa9fe0000UL)) #define ip4_addr_debug_print_parts(debug, a, b, c, d) \ LWIP_DEBUGF(debug, ("%" U16_F ".%" U16_F ".%" U16_F ".%" U16_F, a, b, c, d)) #define ip4_addr_debug_print(debug, ipaddr) \ ip4_addr_debug_print_parts(debug, \ (u16_t)((ipaddr) != NULL ? ip4_addr1_16(ipaddr) : 0), \ (u16_t)((ipaddr) != NULL ? ip4_addr2_16(ipaddr) : 0), \ (u16_t)((ipaddr) != NULL ? ip4_addr3_16(ipaddr) : 0), \ (u16_t)((ipaddr) != NULL ? ip4_addr4_16(ipaddr) : 0)) #define ip4_addr_debug_print_val(debug, ipaddr) \ ip4_addr_debug_print_parts(debug, \ ip4_addr1_16_val(ipaddr), \ ip4_addr2_16_val(ipaddr), \ ip4_addr3_16_val(ipaddr), \ ip4_addr4_16_val(ipaddr)) /* Get one byte from the 4-byte address */ #define ip4_addr_get_byte(ipaddr, idx) (((const u8_t*)(&(ipaddr)->addr))[idx]) #define ip4_addr1(ipaddr) ip4_addr_get_byte(ipaddr, 0) #define ip4_addr2(ipaddr) ip4_addr_get_byte(ipaddr, 1) #define ip4_addr3(ipaddr) ip4_addr_get_byte(ipaddr, 2) #define ip4_addr4(ipaddr) ip4_addr_get_byte(ipaddr, 3) /* Get one byte from the 4-byte address, but argument is 'ip4_addr_t', * not a pointer */ #define ip4_addr_get_byte_val(ipaddr, idx) ((u8_t)(((ipaddr).addr >> (idx * 8)) & 0xff)) #define ip4_addr1_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 0) #define ip4_addr2_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 1) #define ip4_addr3_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 2) #define ip4_addr4_val(ipaddr) ip4_addr_get_byte_val(ipaddr, 3) /* These are cast to u16_t, with the intent that they are often arguments * to printf using the U16_F format from cc.h. */ #define ip4_addr1_16(ipaddr) ((u16_t)ip4_addr1(ipaddr)) #define ip4_addr2_16(ipaddr) ((u16_t)ip4_addr2(ipaddr)) #define ip4_addr3_16(ipaddr) ((u16_t)ip4_addr3(ipaddr)) #define ip4_addr4_16(ipaddr) ((u16_t)ip4_addr4(ipaddr)) #define ip4_addr1_16_val(ipaddr) ((u16_t)ip4_addr1_val(ipaddr)) #define ip4_addr2_16_val(ipaddr) ((u16_t)ip4_addr2_val(ipaddr)) #define ip4_addr3_16_val(ipaddr) ((u16_t)ip4_addr3_val(ipaddr)) #define ip4_addr4_16_val(ipaddr) ((u16_t)ip4_addr4_val(ipaddr)) #define IP4ADDR_STRLEN_MAX 16 /** For backwards compatibility */ #define ip_ntoa(ipaddr) ipaddr_ntoa(ipaddr) u32_t ipaddr_addr(const char *cp); int ip4addr_aton(const char *cp, ip4_addr_t *addr); /** returns ptr to static buffer; not reentrant! */ char *ip4addr_ntoa(const ip4_addr_t *addr); char *ip4addr_ntoa_r(const ip4_addr_t *addr, char *buf, int buflen); #ifdef __cplusplus } #endif #endif /* LWIP_IPV4 */ #endif /* LWIP_HDR_IP_ADDR_H */