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#include <sys/types.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#define BLKSIZE (1024*32)
struct sockaddr_in sin;
struct servent *sp;
struct hostent *host;
unsigned 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 *)&sin, sizeof (sin));
sin.sin_family = AF_INET;
f = socket(AF_INET, SOCK_DGRAM, 0);
if (f < 0) {
perror("tcpblast: socket");
exit(3);
}
{
int siz = 1024*32;
setsockopt(f, SOL_SOCKET, SO_SNDBUF, &siz, sizeof(siz));
getsockopt(f, SOL_SOCKET, SO_SNDBUF, &siz, sizeof(siz));
printf("SO_SNDBUF = %d\n", siz);
}
if (bind(f, &sin, sizeof (sin)) < 0) {
perror("tcpblast: bind");
exit(1);
}
host = gethostbyname(argv[1]);
if (host) {
sin.sin_family = host->h_addrtype;
bcopy(host->h_addr, &sin.sin_addr, host->h_length);
} else {
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = inet_addr(argv[1]);
if (sin.sin_addr.s_addr == -1) {
fprintf(stderr, "tcpblast: %s unknown host\n", argv[1]);
exit(1);
}
}
sin.sin_port = htons(9);
if (connect(f, &sin, sizeof(sin)) <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*BLKSIZE)/1024, expms);
printf(" = %.1f kbit/s", (nblocks*BLKSIZE*8.0)/expms);
printf("\n");
}
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