Some quick code to use UDP-only (no TCP) with mBed. Echos received packets and sends packets when a button is pressed
ip_addr.h
00001 /* 00002 * Copyright (c) 2001-2004 Swedish Institute of Computer Science. 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without modification, 00006 * are permitted provided that the following conditions are met: 00007 * 00008 * 1. Redistributions of source code must retain the above copyright notice, 00009 * this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright notice, 00011 * this list of conditions and the following disclaimer in the documentation 00012 * and/or other materials provided with the distribution. 00013 * 3. The name of the author may not be used to endorse or promote products 00014 * derived from this software without specific prior written permission. 00015 * 00016 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 00017 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00018 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 00019 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00020 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 00021 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00022 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00023 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 00024 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 00025 * OF SUCH DAMAGE. 00026 * 00027 * This file is part of the lwIP TCP/IP stack. 00028 * 00029 * Author: Adam Dunkels <adam@sics.se> 00030 * 00031 */ 00032 #ifndef __LWIP_IP_ADDR_H__ 00033 #define __LWIP_IP_ADDR_H__ 00034 00035 #include "lwip/opt.h" 00036 00037 #include "lwip/inet.h" 00038 00039 #ifdef __cplusplus 00040 extern "C" { 00041 #endif 00042 00043 #ifdef PACK_STRUCT_USE_INCLUDES 00044 # include "arch/bpstruct.h" 00045 #endif 00046 PACK_STRUCT_BEGIN 00047 struct ip_addr { 00048 PACK_STRUCT_FIELD(u32_t addr); 00049 } PACK_STRUCT_STRUCT; 00050 PACK_STRUCT_END 00051 #ifdef PACK_STRUCT_USE_INCLUDES 00052 # include "arch/epstruct.h" 00053 #endif 00054 00055 /* 00056 * struct ipaddr2 is used in the definition of the ARP packet format in 00057 * order to support compilers that don't have structure packing. 00058 */ 00059 #ifdef PACK_STRUCT_USE_INCLUDES 00060 # include "arch/bpstruct.h" 00061 #endif 00062 PACK_STRUCT_BEGIN 00063 struct ip_addr2 { 00064 PACK_STRUCT_FIELD(u16_t addrw[2]); 00065 } PACK_STRUCT_STRUCT; 00066 PACK_STRUCT_END 00067 #ifdef PACK_STRUCT_USE_INCLUDES 00068 # include "arch/epstruct.h" 00069 #endif 00070 00071 struct netif; 00072 00073 extern const struct ip_addr ip_addr_any; 00074 extern const struct ip_addr ip_addr_broadcast; 00075 00076 /** IP_ADDR_ can be used as a fixed IP address 00077 * for the wildcard and the broadcast address 00078 */ 00079 #define IP_ADDR_ANY ((struct ip_addr *)&ip_addr_any) 00080 #define IP_ADDR_BROADCAST ((struct ip_addr *)&ip_addr_broadcast) 00081 00082 /* Definitions of the bits in an Internet address integer. 00083 00084 On subnets, host and network parts are found according to 00085 the subnet mask, not these masks. */ 00086 00087 #define IN_CLASSA(a) ((((u32_t)(a)) & 0x80000000UL) == 0) 00088 #define IN_CLASSA_NET 0xff000000 00089 #define IN_CLASSA_NSHIFT 24 00090 #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) 00091 #define IN_CLASSA_MAX 128 00092 00093 #define IN_CLASSB(a) ((((u32_t)(a)) & 0xc0000000UL) == 0x80000000UL) 00094 #define IN_CLASSB_NET 0xffff0000 00095 #define IN_CLASSB_NSHIFT 16 00096 #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) 00097 #define IN_CLASSB_MAX 65536 00098 00099 #define IN_CLASSC(a) ((((u32_t)(a)) & 0xe0000000UL) == 0xc0000000UL) 00100 #define IN_CLASSC_NET 0xffffff00 00101 #define IN_CLASSC_NSHIFT 8 00102 #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) 00103 00104 #define IN_CLASSD(a) (((u32_t)(a) & 0xf0000000UL) == 0xe0000000UL) 00105 #define IN_CLASSD_NET 0xf0000000 /* These ones aren't really */ 00106 #define IN_CLASSD_NSHIFT 28 /* net and host fields, but */ 00107 #define IN_CLASSD_HOST 0x0fffffff /* routing needn't know. */ 00108 #define IN_MULTICAST(a) IN_CLASSD(a) 00109 00110 #define IN_EXPERIMENTAL(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL) 00111 #define IN_BADCLASS(a) (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL) 00112 00113 #define IN_LOOPBACKNET 127 /* official! */ 00114 00115 #define IP4_ADDR(ipaddr, a,b,c,d) \ 00116 (ipaddr)->addr = htonl(((u32_t)((a) & 0xff) << 24) | \ 00117 ((u32_t)((b) & 0xff) << 16) | \ 00118 ((u32_t)((c) & 0xff) << 8) | \ 00119 (u32_t)((d) & 0xff)) 00120 00121 #define ip_addr_set(dest, src) (dest)->addr = \ 00122 ((src) == NULL? 0:\ 00123 (src)->addr) 00124 /** 00125 * Determine if two address are on the same network. 00126 * 00127 * @arg addr1 IP address 1 00128 * @arg addr2 IP address 2 00129 * @arg mask network identifier mask 00130 * @return !0 if the network identifiers of both address match 00131 */ 00132 #define ip_addr_netcmp(addr1, addr2, mask) (((addr1)->addr & \ 00133 (mask)->addr) == \ 00134 ((addr2)->addr & \ 00135 (mask)->addr)) 00136 #define ip_addr_cmp(addr1, addr2) ((addr1)->addr == (addr2)->addr) 00137 00138 #define ip_addr_isany(addr1) ((addr1) == NULL || (addr1)->addr == 0) 00139 00140 u8_t ip_addr_isbroadcast(struct ip_addr *, struct netif *); 00141 00142 #define ip_addr_ismulticast(addr1) (((addr1)->addr & ntohl(0xf0000000UL)) == ntohl(0xe0000000UL)) 00143 00144 #define ip_addr_islinklocal(addr1) (((addr1)->addr & ntohl(0xffff0000UL)) == ntohl(0xa9fe0000UL)) 00145 00146 #define ip_addr_debug_print(debug, ipaddr) \ 00147 LWIP_DEBUGF(debug, ("%"U16_F".%"U16_F".%"U16_F".%"U16_F, \ 00148 ipaddr != NULL ? \ 00149 (u16_t)(ntohl((ipaddr)->addr) >> 24) & 0xff : 0, \ 00150 ipaddr != NULL ? \ 00151 (u16_t)(ntohl((ipaddr)->addr) >> 16) & 0xff : 0, \ 00152 ipaddr != NULL ? \ 00153 (u16_t)(ntohl((ipaddr)->addr) >> 8) & 0xff : 0, \ 00154 ipaddr != NULL ? \ 00155 (u16_t)ntohl((ipaddr)->addr) & 0xff : 0)) 00156 00157 /* These are cast to u16_t, with the intent that they are often arguments 00158 * to printf using the U16_F format from cc.h. */ 00159 #define ip4_addr1(ipaddr) ((u16_t)(ntohl((ipaddr)->addr) >> 24) & 0xff) 00160 #define ip4_addr2(ipaddr) ((u16_t)(ntohl((ipaddr)->addr) >> 16) & 0xff) 00161 #define ip4_addr3(ipaddr) ((u16_t)(ntohl((ipaddr)->addr) >> 8) & 0xff) 00162 #define ip4_addr4(ipaddr) ((u16_t)(ntohl((ipaddr)->addr)) & 0xff) 00163 00164 /** 00165 * Same as inet_ntoa() but takes a struct ip_addr* 00166 */ 00167 #define ip_ntoa(addr) ((addr != NULL) ? inet_ntoa(*((struct in_addr*)(addr))) : "NULL") 00168 00169 #ifdef __cplusplus 00170 } 00171 #endif 00172 00173 #endif /* __LWIP_IP_ADDR_H__ */
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