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60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/*
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* Copyright (c) 1996 W. Richard Stevens. All rights reserved.
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* Permission to use or modify this software and its documentation only for
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* educational purposes and without fee is hereby granted, provided that
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* the above copyright notice appear in all copies. The author makes no
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* representations about the suitability of this software for any purpose.
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* It is provided "as is" without express or implied warranty.
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*/
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#include "cliserv.h"
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int
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main(int argc, char *argv[])
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{
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struct sockaddr_in serv;
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char request[5000], reply[5000];
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int sockfd, n, len, i;
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double rtt, minrtt;
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if (argc != 2)
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err_quit("usage: tcpcli <IP address of server>");
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memset(&serv, sizeof(serv), 0);
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serv.sin_family = AF_INET;
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serv.sin_addr.s_addr = inet_addr(argv[1]);
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serv.sin_port = htons(TCP_SERV_PORT);
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for (len = 0; len <= 1400; len += 100) {
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printf("len = %d\n", len);
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minrtt = 9999999;
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for (i = 0; i < 30; i++) {
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if ( (sockfd = socket(PF_INET, SOCK_STREAM, 0)) < 0)
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err_sys("socket error");
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start_timer();
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if (connect(sockfd, (SA) &serv, sizeof(serv)) < 0)
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err_sys("connect error");
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/* form request[] ... */
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if (write(sockfd, request, len) != len)
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err_sys("write error");
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if (shutdown(sockfd, 1) < 0)
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err_sys("shutdown error");
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if ( (n = read_stream(sockfd, reply, len)) != len)
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err_sys("read error, n = %d", n);
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rtt = print_timer();
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minrtt = min(minrtt, rtt);
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/* process "n" bytes of reply[] ... */
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close(sockfd);
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}
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printf("min rtt = %9.3f\n\n", minrtt);
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}
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exit(0);
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}
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