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