1 /* 2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without modification, 6 * are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 25 * OF SUCH DAMAGE. 26 * 27 * This file is part of the lwIP TCP/IP stack. 28 * 29 * Author: Adam Dunkels <adam@sics.se> 30 * 31 */ 32 #ifndef __LWIP_IP_H__ 33 #define __LWIP_IP_H__ 34 35 #include "lwip/opt.h" 36 #include "lwip/def.h" 37 #include "lwip/pbuf.h" 38 #include "lwip/ip_addr.h" 39 40 #include "lwip/err.h" 41 42 #ifdef __cplusplus 43 extern "C" { 44 #endif 45 46 #define IP_HLEN 40 47 48 #define IP_PROTO_ICMP 58 49 #define IP_PROTO_UDP 17 50 #define IP_PROTO_UDPLITE 136 51 #define IP_PROTO_TCP 6 52 53 /* This is passed as the destination address to ip_output_if (not 54 to ip_output), meaning that an IP header already is constructed 55 in the pbuf. This is used when TCP retransmits. */ 56 #ifdef IP_HDRINCL 57 #undef IP_HDRINCL 58 #endif /* IP_HDRINCL */ 59 #define IP_HDRINCL NULL 60 61 #if LWIP_NETIF_HWADDRHINT 62 #define IP_PCB_ADDRHINT ;u8_t addr_hint 63 #else 64 #define IP_PCB_ADDRHINT 65 #endif /* LWIP_NETIF_HWADDRHINT */ 66 67 /* This is the common part of all PCB types. It needs to be at the 68 beginning of a PCB type definition. It is located here so that 69 changes to this common part are made in one location instead of 70 having to change all PCB structs. */ 71 #define IP_PCB struct ip_addr local_ip; \ 72 struct ip_addr remote_ip; \ 73 /* Socket options */ \ 74 u16_t so_options; \ 75 /* Type Of Service */ \ 76 u8_t tos; \ 77 /* Time To Live */ \ 78 u8_t ttl; \ 79 /* link layer address resolution hint */ \ 80 IP_PCB_ADDRHINT 81 82 83 /* The IPv6 header. */ 84 struct ip_hdr { 85 #if BYTE_ORDER == LITTLE_ENDIAN 86 u8_t tclass1:4, v:4; 87 u8_t flow1:4, tclass2:4; 88 #else 89 u8_t v:4, tclass1:4; 90 u8_t tclass2:8, flow1:4; 91 #endif 92 u16_t flow2; 93 u16_t len; /* payload length */ 94 u8_t nexthdr; /* next header */ 95 u8_t hoplim; /* hop limit (TTL) */ 96 struct ip_addr src, dest; /* source and destination IP addresses */ 97 }; 98 99 #define IPH_PROTO(hdr) (iphdr->nexthdr) 100 101 void ip_init(void); 102 103 #include "lwip/netif.h" 104 105 struct netif *ip_route(struct ip_addr *dest); 106 107 void ip_input(struct pbuf *p, struct netif *inp); 108 109 /* source and destination addresses in network byte order, please */ 110 err_t ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, 111 u8_t ttl, u8_t proto); 112 113 err_t ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, 114 u8_t ttl, u8_t proto, 115 struct netif *netif); 116 117 #define ip_current_netif() NULL 118 #define ip_current_header() NULL 119 120 #if IP_DEBUG 121 void ip_debug_print(struct pbuf *p); 122 #endif /* IP_DEBUG */ 123 124 #ifdef __cplusplus 125 } 126 #endif 127 128 #endif /* __LWIP_IP_H__ */ 129 130 131