icmp.h

完整的TCP/IP源代码,绝对好用

/***********************************************************************
*                                                                       
* FILE NAME                                     VERSION                         
*                                                                               
*      ICMP.H                                     1.0                           
*                                                                               
* COMPONENT                                                             
*                                                                       
*      ICMP - Internet Control Message Protocol                         
*                                                                       
* DESCRIPTION                                                           
*                                                                       
*      Holds the defines for the ICMP protocol.                         
*                                                                       
* DATA STRUCTURES                                                       
*                                                                       
*      ICMP_LAYER                                                       
*      ICMP_ECHO_LIST_ENTRY                                             
*      ICMP_ECHO_LIST                                                   
*                                                                       
* DEPENDENCIES                                                          
*                                                                       
*      No other file dependencies                                       
*                                                                       
*************************************************************************/

#ifndef ICMP_H
#define ICMP_H
#include "C:\wql\tcpipsocket\target.h"
#include "C:\wql\tcpipsocket\ip.h"

typedef struct ICMP_LAYER_STRUCT
{
    UINT8   icmp_type;                  /* Type of ICMP message. */
    UINT8   icmp_code;                  /* Sub code. */
    UINT16  icmp_cksum;                 /* Ones complement check sum .*/

    union {                             /* ICMP header union. */
        UINT8   ih_pptr;

        UINT8  ih_gwaddr[4];

        struct  ih_idseq {
            INT16   icd_id;
            INT16   icd_seq;
        } ih_idseq;

        INT32   ih_void;

        struct ih_pmtu {
            INT16   ipm_void;
            INT16   ipm_nextmtu;
        }ih_pmtu;

    }icmp_hun;

    union {
        struct id_ts  {
            UINT32  its_otime;
            UINT32  its_rtime;
            UINT32  its_ttime;
        } id_ts;

        IPLAYER id_ip;

        UINT32  id_mask;

        INT8    id_data[32];    // BUFFER

    } icmp_dun;

}ICMP_LAYER;

//******************************************
typedef struct ICMP_ECHO_Cache
{
    UINT8 *   dest_ip;
    UINT16    Timer;
    UINT8      Flag;
} ICMP_ECHO_Cache;

// define echo flag status
#define ICMP_REPLY   2
#define ICMP_TIMER_ERR   1
#define ICMP_NORMAL   0
#define ICMP_WAIT   4


/* ICMP echo request definitions. */
#define        ICMP_ECHO_REQ_ID                 0x4154 /* AT */
#define        ICMP_DEFAULT_ECHO_TIMEOUT        (5 * SCK_Ticks_Per_Second)
#define        ICMP_ECHO_REQ_HEADER_SIZE        8

/* ICMP Type definitions. */
#define        ICMP_ECHOREPLY                   0
#define        ICMP_UNREACH                     3
#define        ICMP_SOURCEQUENCH                4
#define        ICMP_REDIRECT                    5
#define        ICMP_ECHO                        8
#define        ICMP_TIMXCEED                    11
#define        ICMP_PARAPROB                    12
#define        ICMP_TIMESTAMP                   13
#define        ICMP_TIMESTAMPREPLY              14
#define        ICMP_INFOREQUEST                 15
#define        ICMP_INFOREPLY                   16

/* ICMP code definitions. */
#define        ICMP_UNREACH_NET                 0
#define        ICMP_UNREACH_HOST                1
#define        ICMP_UNREACH_PROTOCOL            2
#define        ICMP_UNREACH_PORT                3
#define        ICMP_UNREACH_NEEDFRAG            4
#define        ICMP_UNREACH_SRCFAIL             5

#define        ICMP_TIMXCEED_TTL                0
#define        ICMP_TIMXCEED_REASM              1

#define        ICMP_PARAPROB_OFFSET             0

#define        ICMP_REDIRECT_NET                0
#define        ICMP_REDIRECT_HOST               1
#define        ICMP_REDIRECT_TOSNET             2
#define        ICMP_REDIRECT_TOSHOST            3

#define        icmp_cache_num                   1

/* Function Prototypes. */
void ICMP_Send_Error(UINT8 type, UINT8 code1, UINT8 * dest);

void    ICMP_Init();
void  ICMP_Send_Echo_Request( UINT8 *, UINT16);
//void  ICMP_Echo_Reply (UINT8 *buf_ptr,UINT8 * IP_ADDR);
UINT8 ICMP_Interpret (UINT8* buf_ptr, UINT16 buf_size , UINT8 *ip_source);
void ICMP_dest_unreach_send(UINT8 *DD, UINT8 *IP_ADDR);


#endif /* ICMP_H */