ping.h

一个简单的ISOS模块代码。A simple ISOS module code

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/* 
 * PING - very simple ping support
 */

#ifndef _ISOS_PING_H
#define _ISOS_PING_H

#include <sys/types.h>
#include <sys/time.h>


#define DEFAULT_NUM_PING_ATTEMPTS       1       /* once    */
#define DEFAULT_PING_TIMEOUT            4       /* seconds */

/* Number of extra data bytes to transmit */
#define PING_EXTRA_DATA_LEN             32

/*
 * Extra data is filled with numeric pattern (consistent numbers).
 * The following macro defines value of the first number.
 */
#define PING_EXTRA_DATA_FIRST_VALUE     64


int main(void);

int do_ping_v4_v6(const char *ipdest, const char *ifname);
int do_ping(const char *ipdest);

/* For backward compatibility only */
inline int
do_ping(const char *ipdest)
{
    return do_ping_v4_v6(ipdest, NULL);
}

u_short in_cksum(u_short *addr, int len);

void tv_sub(struct timeval *out, struct timeval *in);

#endif