reactos/lib/drivers/lwip/src/include/ipv4/lwip/icmp.h

   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 #include "lwip/pbuf.h"
  37 #include "lwip/ip_addr.h"
  38 #include "lwip/netif.h"
  39
  40 #ifdef __cplusplus
  41 extern "C" {
  42 #endif
  43
  44 #define ICMP_ER   0    /* echo reply */
  45 #define ICMP_DUR  3    /* destination unreachable */
  46 #define ICMP_SQ   4    /* source quench */
  47 #define ICMP_RD   5    /* redirect */
  48 #define ICMP_ECHO 8    /* echo */
  49 #define ICMP_TE  11    /* time exceeded */
  50 #define ICMP_PP  12    /* parameter problem */
  51 #define ICMP_TS  13    /* timestamp */
  52 #define ICMP_TSR 14    /* timestamp reply */
  53 #define ICMP_IRQ 15    /* information request */
  54 #define ICMP_IR  16    /* information reply */
  55
  56 enum icmp_dur_type {
  57   ICMP_DUR_NET   = 0,  /* net unreachable */
  58   ICMP_DUR_HOST  = 1,  /* host unreachable */
  59   ICMP_DUR_PROTO = 2,  /* protocol unreachable */
  60   ICMP_DUR_PORT  = 3,  /* port unreachable */
  61   ICMP_DUR_FRAG  = 4,  /* fragmentation needed and DF set */
  62   ICMP_DUR_SR    = 5   /* source route failed */
  63 };
  64
  65 enum icmp_te_type {
  66   ICMP_TE_TTL  = 0,    /* time to live exceeded in transit */
  67   ICMP_TE_FRAG = 1     /* fragment reassembly time exceeded */
  68 };
  69
  70 #ifdef PACK_STRUCT_USE_INCLUDES
  71 #  include "arch/bpstruct.h"
  72 #endif
  73 /** This is the standard ICMP header only that the u32_t data
  74  *  is splitted to two u16_t like ICMP echo needs it.
  75  *  This header is also used for other ICMP types that do not
  76  *  use the data part.
  77  */
  78 PACK_STRUCT_BEGIN
  79 struct icmp_echo_hdr {
  80   PACK_STRUCT_FIELD(u8_t type);
  81   PACK_STRUCT_FIELD(u8_t code);
  82   PACK_STRUCT_FIELD(u16_t chksum);
  83   PACK_STRUCT_FIELD(u16_t id);
  84   PACK_STRUCT_FIELD(u16_t seqno);
  85 } PACK_STRUCT_STRUCT;
  86 PACK_STRUCT_END
  87 #ifdef PACK_STRUCT_USE_INCLUDES
  88 #  include "arch/epstruct.h"
  89 #endif
  90
  91 #define ICMPH_TYPE(hdr) ((hdr)->type)
  92 #define ICMPH_CODE(hdr) ((hdr)->code)
  93
  94 /** Combines type and code to an u16_t */
  95 #define ICMPH_TYPE_SET(hdr, t) ((hdr)->type = (t))
  96 #define ICMPH_CODE_SET(hdr, c) ((hdr)->code = (c))
  97
  98
  99 #if LWIP_ICMP /* don't build if not configured for use in lwipopts.h */
 100
 101 void icmp_input(struct pbuf *p, struct netif *inp);
 102 void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t);
 103 void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t);
 104
 105 #endif /* LWIP_ICMP */
 106
 107 #ifdef __cplusplus
 108 }
 109 #endif
 110
 111 #endif /* __LWIP_ICMP_H__ */