2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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3 * All rights reserved.
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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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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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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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27 * This file is part of the lwIP TCP/IP stack.
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29 * Author: Adam Dunkels <adam@sics.se>
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32 #ifndef __LWIP_ICMP_H__
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33 #define __LWIP_ICMP_H__
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35 #include "lwip/arch.h"
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37 #include "lwip/opt.h"
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38 #include "lwip/pbuf.h"
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40 #include "lwip/ip_addr.h"
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41 #include "lwip/netif.h"
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43 #define ICMP_ER 0 /* echo reply */
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44 #define ICMP_DUR 3 /* destination unreachable */
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45 #define ICMP_SQ 4 /* source quench */
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46 #define ICMP_RD 5 /* redirect */
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47 #define ICMP_ECHO 8 /* echo */
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48 #define ICMP_TE 11 /* time exceeded */
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49 #define ICMP_PP 12 /* parameter problem */
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50 #define ICMP_TS 13 /* timestamp */
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51 #define ICMP_TSR 14 /* timestamp reply */
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52 #define ICMP_IRQ 15 /* information request */
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53 #define ICMP_IR 16 /* information reply */
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55 enum icmp_dur_type {
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56 ICMP_DUR_NET = 0, /* net unreachable */
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57 ICMP_DUR_HOST = 1, /* host unreachable */
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58 ICMP_DUR_PROTO = 2, /* protocol unreachable */
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59 ICMP_DUR_PORT = 3, /* port unreachable */
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60 ICMP_DUR_FRAG = 4, /* fragmentation needed and DF set */
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61 ICMP_DUR_SR = 5 /* source route failed */
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65 ICMP_TE_TTL = 0, /* time to live exceeded in transit */
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66 ICMP_TE_FRAG = 1 /* fragment reassembly time exceeded */
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69 void icmp_input(struct pbuf *p, struct netif *inp);
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71 void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t);
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72 void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t);
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74 #ifdef PACK_STRUCT_USE_INCLUDES
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75 # include "arch/bpstruct.h"
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78 struct icmp_echo_hdr {
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79 PACK_STRUCT_FIELD(u16_t _type_code);
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80 PACK_STRUCT_FIELD(u16_t chksum);
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81 PACK_STRUCT_FIELD(u16_t id);
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82 PACK_STRUCT_FIELD(u16_t seqno);
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83 } PACK_STRUCT_STRUCT;
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87 struct icmp_dur_hdr {
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88 PACK_STRUCT_FIELD(u16_t _type_code);
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89 PACK_STRUCT_FIELD(u16_t chksum);
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90 PACK_STRUCT_FIELD(u32_t unused);
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91 } PACK_STRUCT_STRUCT;
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95 struct icmp_te_hdr {
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96 PACK_STRUCT_FIELD(u16_t _type_code);
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97 PACK_STRUCT_FIELD(u16_t chksum);
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98 PACK_STRUCT_FIELD(u32_t unused);
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99 } PACK_STRUCT_STRUCT;
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101 #ifdef PACK_STRUCT_USE_INCLUDES
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102 # include "arch/epstruct.h"
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105 #define ICMPH_TYPE(hdr) (ntohs((hdr)->_type_code) >> 8)
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106 #define ICMPH_CODE(hdr) (ntohs((hdr)->_type_code) & 0xff)
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108 #define ICMPH_TYPE_SET(hdr, type) ((hdr)->_type_code = htons(ICMPH_CODE(hdr) | ((type) << 8)))
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109 #define ICMPH_CODE_SET(hdr, code) ((hdr)->_type_code = htons((code) | (ICMPH_TYPE(hdr) << 8)))
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111 #endif /* __LWIP_ICMP_H__ */
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