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_ICMP_H__
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33 | #define __LWIP_ICMP_H__
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34 |
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35 | #include "lwip/opt.h"
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36 |
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37 | #if LWIP_ICMP /* don't build if not configured for use in lwipopts.h */
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38 |
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39 | #include "lwip/pbuf.h"
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40 | #include "lwip/netif.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 ICMP6_DUR 1
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47 | #define ICMP6_TE 3
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48 | #define ICMP6_ECHO 128 /* echo */
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49 | #define ICMP6_ER 129 /* echo reply */
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50 |
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51 |
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52 | enum icmp_dur_type {
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53 | ICMP_DUR_NET = 0, /* net unreachable */
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54 | ICMP_DUR_HOST = 1, /* host unreachable */
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55 | ICMP_DUR_PROTO = 2, /* protocol unreachable */
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56 | ICMP_DUR_PORT = 3, /* port unreachable */
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57 | ICMP_DUR_FRAG = 4, /* fragmentation needed and DF set */
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58 | ICMP_DUR_SR = 5 /* source route failed */
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59 | };
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60 |
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61 | enum icmp_te_type {
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62 | ICMP_TE_TTL = 0, /* time to live exceeded in transit */
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63 | ICMP_TE_FRAG = 1 /* fragment reassembly time exceeded */
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64 | };
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65 |
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66 | void icmp_input(struct pbuf *p, struct netif *inp);
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67 |
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68 | void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t);
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69 | void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t);
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70 |
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71 | struct icmp_echo_hdr {
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72 | u8_t type;
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73 | u8_t icode;
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74 | u16_t chksum;
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75 | u16_t id;
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76 | u16_t seqno;
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77 | };
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78 |
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79 | struct icmp_dur_hdr {
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80 | u8_t type;
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81 | u8_t icode;
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82 | u16_t chksum;
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83 | u32_t unused;
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84 | };
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85 |
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86 | struct icmp_te_hdr {
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87 | u8_t type;
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88 | u8_t icode;
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89 | u16_t chksum;
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90 | u32_t unused;
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91 | };
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92 |
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93 | #ifdef __cplusplus
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94 | }
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95 | #endif
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96 |
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97 | #endif /* LWIP_ICMP */
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98 |
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99 | #endif /* __LWIP_ICMP_H__ */
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100 |
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