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/*
* tcpblast - test and estimate TCP thruput
*
* Daniel Karrenberg <dfk@nic.eu.net>
*/
#include <sys/types.h>
#include <machine/endian.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#define BLKSIZE 1024
struct sockaddr_in sock_in;
struct servent *sp;
struct hostent *host;
long starts, startms, stops, stopms, expms;
struct timeval ti;
struct timezone tiz;
char greet[BLKSIZE] = "Hi!";
int nblocks;
int f;
int main(argc, argv)
int argc; char **argv;
{
register int i;
if (argc!=3)
{
fprintf(stderr, "usage: tcpblast destination nblkocks\n");
fprintf(stderr, "blocksize: %d bytes\n", BLKSIZE);
exit(1);
}
nblocks = atoi(argv[2]);
if (nblocks<=1 || nblocks>=10000)
{
fprintf(stderr, "tcpblast: 1 < nblocks <= 10000 \n");
exit(1);
}
bzero((char *)&sock_in, sizeof (sock_in));
sock_in.sin_family = AF_INET;
f = socket(AF_INET, SOCK_STREAM, 0);
if (f < 0) {
perror("tcpblast: socket");
exit(3);
}
if (bind(f, (struct sockaddr*) &sock_in, sizeof (sock_in)) < 0) {
perror("tcpblast: bind");
exit(1);
}
host = gethostbyname(argv[1]);
if (host) {
sock_in.sin_family = host->h_addrtype;
bcopy(host->h_addr, &sock_in.sin_addr, host->h_length);
} else {
sock_in.sin_family = AF_INET;
sock_in.sin_addr.s_addr = inet_addr(argv[1]);
if (sock_in.sin_addr.s_addr == -1) {
fprintf(stderr, "tcpblast: %s unknown host\n", argv[1]);
exit(1);
}
}
sock_in.sin_port = htons(9);
if (connect(f, (struct sockaddr*) &sock_in, sizeof(sock_in)) <0)
{
perror("tcpblast connect:");
exit(1);
}
if (gettimeofday(&ti, &tiz) < 0)
{
perror("tcpblast time:");
exit(1);
}
starts = ti.tv_sec;
startms = ti.tv_usec / 1000L;
for (i=0; i<nblocks; i++)
{
if (write(f, greet, BLKSIZE) != BLKSIZE)
perror("tcpblast send:");
write(1, ".", 1);
}
if (gettimeofday(&ti, &tiz) < 0)
{
perror("tcpblast time:");
exit(1);
}
stops = ti.tv_sec;
stopms = ti.tv_usec / 1000L;
expms = (stops-starts)*1000 + (stopms-startms);
printf("\n%d KB in %ld msec", nblocks, expms);
printf(" = %.1f kbit/s", (double) (nblocks*BLKSIZE) / expms * 8000.0);
printf(" = %.1f kByte/s", (double) (nblocks*BLKSIZE) / expms * 1000);
printf(" = %.1f MByte/s\n", (double) (nblocks*BLKSIZE) / (double)(expms*1024.0));
return(0);
}
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