mirror of https://framagit.org/bortzmeyer/echoping
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/*
|
|
* Copyright (c) 1996 W. Richard Stevens. All rights reserved.
|
|
* Permission to use or modify this software and its documentation only for
|
|
* educational purposes and without fee is hereby granted, provided that
|
|
* the above copyright notice appear in all copies. The author makes no
|
|
* representations about the suitability of this software for any purpose.
|
|
* It is provided "as is" without express or implied warranty.
|
|
*/
|
|
|
|
#include "cliserv.h"
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
struct sockaddr_in serv;
|
|
char request[5000], reply[5000];
|
|
int sockfd, n, len, i;
|
|
double rtt, minrtt;
|
|
|
|
if (argc != 2)
|
|
err_quit("usage: udpcli <IP address of server>");
|
|
|
|
if ( (sockfd = socket(PF_INET, SOCK_DGRAM, 0)) < 0)
|
|
err_sys("socket error");
|
|
|
|
memset(&serv, sizeof(serv), 0);
|
|
serv.sin_family = AF_INET;
|
|
serv.sin_addr.s_addr = inet_addr(argv[1]);
|
|
serv.sin_port = htons(UDP_SERV_PORT);
|
|
|
|
/* form request[] ... */
|
|
|
|
for (len = 0; len <= 1400; len += 100) { /* len = amount of user data */
|
|
printf("len = %d\n", len);
|
|
minrtt = 9999999;
|
|
for (i = 0; i < 30; i++) {
|
|
start_timer();
|
|
|
|
if (sendto(sockfd, request, len, 0,
|
|
(SA) &serv, sizeof(serv)) != len)
|
|
err_sys("sendto error");
|
|
|
|
if ( (n = recvfrom(sockfd, reply, sizeof(reply), 0,
|
|
(SA) NULL, (int *) NULL)) != len)
|
|
err_sys("recvfrom error");
|
|
|
|
rtt = print_timer();
|
|
minrtt = min(minrtt, rtt);
|
|
|
|
/* process "n" bytes of reply[] ... */
|
|
}
|
|
printf("min rtt = %9.3f\n\n", minrtt);
|
|
}
|
|
exit(0);
|
|
}
|