2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
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.
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
27 * This file is part of the lwIP TCP/IP stack.
29 * Author: Adam Dunkels <adam@sics.se>
32 #ifndef __LWIP_ICMP_H__
33 #define __LWIP_ICMP_H__
37 #if LWIP_ICMP /* don't build if not configured for use in lwipopts.h */
39 #include "lwip/pbuf.h"
40 #include "lwip/ip_addr.h"
41 #include "lwip/netif.h"
47 #define ICMP_ER 0 /* echo reply */
48 #define ICMP_DUR 3 /* destination unreachable */
49 #define ICMP_SQ 4 /* source quench */
50 #define ICMP_RD 5 /* redirect */
51 #define ICMP_ECHO 8 /* echo */
52 #define ICMP_TE 11 /* time exceeded */
53 #define ICMP_PP 12 /* parameter problem */
54 #define ICMP_TS 13 /* timestamp */
55 #define ICMP_TSR 14 /* timestamp reply */
56 #define ICMP_IRQ 15 /* information request */
57 #define ICMP_IR 16 /* information reply */
60 ICMP_DUR_NET = 0, /* net unreachable */
61 ICMP_DUR_HOST = 1, /* host unreachable */
62 ICMP_DUR_PROTO = 2, /* protocol unreachable */
63 ICMP_DUR_PORT = 3, /* port unreachable */
64 ICMP_DUR_FRAG = 4, /* fragmentation needed and DF set */
65 ICMP_DUR_SR = 5 /* source route failed */
69 ICMP_TE_TTL = 0, /* time to live exceeded in transit */
70 ICMP_TE_FRAG = 1 /* fragment reassembly time exceeded */
73 void icmp_input(struct pbuf *p, struct netif *inp);
75 void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t);
76 void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t);
78 #ifdef PACK_STRUCT_USE_INCLUDES
79 # include "arch/bpstruct.h"
82 struct icmp_echo_hdr {
83 PACK_STRUCT_FIELD(u16_t _type_code);
84 PACK_STRUCT_FIELD(u16_t chksum);
85 PACK_STRUCT_FIELD(u16_t id);
86 PACK_STRUCT_FIELD(u16_t seqno);
92 PACK_STRUCT_FIELD(u16_t _type_code);
93 PACK_STRUCT_FIELD(u16_t chksum);
94 PACK_STRUCT_FIELD(u32_t unused);
100 PACK_STRUCT_FIELD(u16_t _type_code);
101 PACK_STRUCT_FIELD(u16_t chksum);
102 PACK_STRUCT_FIELD(u32_t unused);
103 } PACK_STRUCT_STRUCT;
105 #ifdef PACK_STRUCT_USE_INCLUDES
106 # include "arch/epstruct.h"
109 #define ICMPH_TYPE(hdr) (ntohs((hdr)->_type_code) >> 8)
110 #define ICMPH_CODE(hdr) (ntohs((hdr)->_type_code) & 0xff)
112 #define ICMPH_TYPE_SET(hdr, type) ((hdr)->_type_code = htons(ICMPH_CODE(hdr) | ((type) << 8)))
113 #define ICMPH_CODE_SET(hdr, code) ((hdr)->_type_code = htons((code) | (ICMPH_TYPE(hdr) << 8)))
119 #endif /* LWIP_ICMP */
121 #endif /* __LWIP_ICMP_H__ */