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_ICMP_H__
33#define __LWIP_ICMP_H__
34
35#include "lwip/opt.h"
36
37#if LWIP_ICMP                   /* don't build if not configured for use in lwipopts.h */
38
39#include "lwip/pbuf.h"
40#include "lwip/netif.h"
41
42#ifdef __cplusplus
43extern "C" {
44#endif
45
46#define ICMP6_DUR  1
47#define ICMP6_TE   3
48#define ICMP6_ECHO 128          /* echo */
49#define ICMP6_ER   129          /* echo reply */
50
51
52    enum icmp_dur_type {
53        ICMP_DUR_NET = 0,       /* net unreachable */
54        ICMP_DUR_HOST = 1,      /* host unreachable */
55        ICMP_DUR_PROTO = 2,     /* protocol unreachable */
56        ICMP_DUR_PORT = 3,      /* port unreachable */
57        ICMP_DUR_FRAG = 4,      /* fragmentation needed and DF set */
58        ICMP_DUR_SR = 5         /* source route failed */
59    };
60
61    enum icmp_te_type {
62        ICMP_TE_TTL = 0,        /* time to live exceeded in transit */
63        ICMP_TE_FRAG = 1        /* fragment reassembly time exceeded */
64    };
65
66    void icmp_input(struct pbuf *p, struct netif *inp);
67
68    void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t);
69    void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t);
70
71    struct icmp_echo_hdr {
72        u8_t type;
73        u8_t icode;
74        u16_t chksum;
75        u16_t id;
76        u16_t seqno;
77    };
78
79    struct icmp_dur_hdr {
80        u8_t type;
81        u8_t icode;
82        u16_t chksum;
83        u32_t unused;
84    };
85
86    struct icmp_te_hdr {
87        u8_t type;
88        u8_t icode;
89        u16_t chksum;
90        u32_t unused;
91    };
92
93#ifdef __cplusplus
94}
95#endif
96#endif                          /* LWIP_ICMP */
97#endif                          /* __LWIP_ICMP_H__ */
98