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//==========================================================================
//
// tests/tcp_sink.c
//
// Simple TCP throughput test - sink component
// * CAUTION: host, i.e. non eCos, only *
//
//==========================================================================
// ####BSDALTCOPYRIGHTBEGIN####
// -------------------------------------------
// Portions of this software may have been derived from FreeBSD, OpenBSD,
// or other sources, and if so are covered by the appropriate copyright
// and license included herein.
// -------------------------------------------
// ####BSDALTCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): gthomas
// Contributors: gthomas
// Date: 2000-01-10
// Purpose:
// Description: This is the middle part of a three part test. The idea is
// to test the throughput of box in a configuration like this:
//
// +------+ port +----+ port +----+
// |SOURCE|=========>|ECHO|============>|SINK|
// +------+ 9990 +----+ 9991 +----+
//
//
//####DESCRIPTIONEND####
//
//==========================================================================
// Network throughput test code
#undef _KERNEL
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <net/if.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netdb.h>
#define SOURCE_PORT 9990
#define SINK_PORT 9991
struct test_params {
long nbufs;
long bufsize;
long load;
};
struct test_status {
long ok;
};
#define NUM_BUF 128
#define MAX_BUF 32 * 8192
static unsigned char data_buf[MAX_BUF];
void
pexit(char *s)
{
perror(s);
exit(1);
}
void
show_results(struct timeval *start, struct timeval *end,
int nbufs, int buflen)
{
struct timeval tot_time;
long tot_bytes = nbufs * buflen;
double real_time, thru;
timersub(end, start, &tot_time);
printf("SINK complete - %d bufs of %d bytes in %ld.%02ld seconds",
nbufs, buflen,
tot_time.tv_sec, tot_time.tv_usec / 10000);
real_time = tot_time.tv_sec + ((tot_time.tv_usec / 10000) * .01);
// Compute bytes / second (rounded up)
thru = tot_bytes / real_time;
// Convert to Mb / second
printf(" - %.2f KB/S", thru / 1024.0);
printf(" - %.4f Mbit/S (M = 10^6)", thru * 8.0 / 1000000.0);
printf("\n");
}
int
do_read(int s, unsigned char *buf, int len)
{
int total, slen, rlen;
total = 0;
rlen = len;
while (total < len) {
slen = read(s, buf, rlen);
if (slen != rlen) {
if (slen < 0) {
printf("Error after reading %d bytes\n", total);
return -1;
}
rlen -= slen;
buf += slen;
}
total += slen;
}
return total;
}
int
do_write(int s, unsigned char *buf, int len)
{
int total, slen, rlen;
total = 0;
rlen = len;
while (total < len) {
slen = write(s, buf, rlen);
if (slen != rlen) {
if (slen < 0) {
printf("Error after writing %d bytes\n", total);
return -1;
}
rlen -= slen;
buf += slen;
}
total += slen;
}
return total;
}
static void
sink_test(char *echo_node)
{
int s_sink;
struct sockaddr_in slave, local;
int one = 1;
int len;
struct hostent *host;
struct test_params params, nparams;
struct test_status status, nstatus;
struct timeval start_time, end_time;
int i;
printf("Start TCP test - SINK mode to %s\n", echo_node);
host = gethostbyname(echo_node);
if (host == (struct hostent *)NULL) {
pexit("gethostbyname");
}
memset(&slave, 0, sizeof(slave));
slave.sin_family = AF_INET;
#ifdef __ECOS
slave.sin_len = sizeof(slave);
#endif
slave.sin_port = htons(SINK_PORT);
memcpy(&slave.sin_addr.s_addr, host->h_addr, host->h_length);
s_sink = socket(AF_INET, SOCK_STREAM, 0);
if (s_sink < 0) {
pexit("stream socket");
}
if (setsockopt(s_sink, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
pexit("setsockopt /sink/ SO_REUSEADDR");
}
memset(&local, 0, sizeof(local));
local.sin_family = AF_INET;
#ifdef __ECOS
local.sin_len = sizeof(local);
#endif
local.sin_port = INADDR_ANY;
local.sin_addr.s_addr = INADDR_ANY;
if(bind(s_sink, (struct sockaddr *) &local, sizeof(local)) < 0) {
pexit("bind /sink/ error");
}
if (connect(s_sink, (struct sockaddr *)&slave, sizeof(slave)) < 0) {
pexit("Can't connect to target");
}
// Get testing paramters from middleman
if (do_read(s_sink, (unsigned char *)&nparams, sizeof(nparams))
!= sizeof(nparams)) {
pexit("Can't read initialization parameters");
}
params.nbufs = ntohl(nparams.nbufs);
params.bufsize = ntohl(nparams.bufsize);
params.load = ntohl(nparams.load);
printf("Using %ld buffers of %ld bytes each\n", params.nbufs, params.bufsize);
// Actual test
gettimeofday(&start_time, 0);
for (i = 0; i < params.nbufs; i++) {
if ((len = do_read(s_sink, data_buf, params.bufsize)) != params.bufsize) {
printf("Error reading buffer #%d:", i+1);
if (len < 0) {
perror("can't read data");
} else {
printf(" short data, only read %d bytes\n", len);
}
}
}
gettimeofday(&end_time, 0);
show_results(&start_time, &end_time, params.nbufs, params.bufsize);
// Tell the middleman
nstatus.ok = htonl(status.ok);
if (do_write(s_sink, (unsigned char *)&nstatus, sizeof(nstatus))
!= sizeof(nstatus)) {
pexit("Can't send ACK to 'echo' host");
}
}
int
main(int argc, char *argv[])
{
sink_test(argv[1]);
return 0;
}
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