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/*
* iperf, Copyright (c) 2014-2023, The Regents of the University of
* California, through Lawrence Berkeley National Laboratory (subject
* to receipt of any required approvals from the U.S. Dept. of
* Energy). All rights reserved.
*
* If you have questions about your rights to use or distribute this
* software, please contact Berkeley Lab's Technology Transfer
* Department at TTD@lbl.gov.
*
* NOTICE. This software is owned by the U.S. Department of Energy.
* As such, the U.S. Government has been granted for itself and others
* acting on its behalf a paid-up, nonexclusive, irrevocable,
* worldwide license in the Software to reproduce, prepare derivative
* works, and perform publicly and display publicly. Beginning five
* (5) years after the date permission to assert copyright is obtained
* from the U.S. Department of Energy, and subject to any subsequent
* five (5) year renewals, the U.S. Government is granted for itself
* and others acting on its behalf a paid-up, nonexclusive,
* irrevocable, worldwide license in the Software to reproduce,
* prepare derivative works, distribute copies to the public, perform
* publicly and display publicly, and to permit others to do so.
*
* This code is distributed under a BSD style license, see the LICENSE
* file for complete information.
*/
#include "iperf_config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <errno.h>
#include <signal.h>
#include <unistd.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include "iperf.h"
#include "iperf_api.h"
#include "iperf_util.h"
#include "iperf_locale.h"
#include "net.h"
#include "units.h"
static int run(struct iperf_test *test);
/**************************************************************************/
int
main(int argc, char **argv)
{
struct iperf_test *test;
/*
* Atomics check. We prefer to have atomic types (which is
* basically on any compiler supporting C11 or better). If we
* don't have them, we try to approximate the type we need with a
* regular integer, but complain if they're not lock-free. We only
* know how to check this on GCC. GCC on CentOS 7 / RHEL 7 is the
* targeted use case for these check.
*/
#ifndef HAVE_STDATOMIC_H
#ifdef __GNUC__
if (! __atomic_always_lock_free (sizeof (u_int64_t), 0)) {
#endif // __GNUC__
fprintf(stderr, "Warning: Cannot guarantee lock-free operation with 64-bit data types\n");
#ifdef __GNUC__
}
#endif // __GNUC__
#endif // HAVE_STDATOMIC_H
// XXX: Setting the process affinity requires root on most systems.
// Is this a feature we really need?
#ifdef TEST_PROC_AFFINITY
/* didn't seem to work.... */
/*
* increasing the priority of the process to minimise packet generation
* delay
*/
int rc = setpriority(PRIO_PROCESS, 0, -15);
if (rc < 0) {
perror("setpriority:");
fprintf(stderr, "setting priority to valid level\n");
rc = setpriority(PRIO_PROCESS, 0, 0);
}
/* setting the affinity of the process */
cpu_set_t cpu_set;
int affinity = -1;
int ncores = 1;
sched_getaffinity(0, sizeof(cpu_set_t), &cpu_set);
if (errno)
perror("couldn't get affinity:");
if ((ncores = sysconf(_SC_NPROCESSORS_CONF)) <= 0)
err("sysconf: couldn't get _SC_NPROCESSORS_CONF");
CPU_ZERO(&cpu_set);
CPU_SET(affinity, &cpu_set);
if (sched_setaffinity(0, sizeof(cpu_set_t), &cpu_set) != 0)
err("couldn't change CPU affinity");
#endif
test = iperf_new_test();
if (!test)
iperf_errexit(NULL, "create new test error - %s", iperf_strerror(i_errno));
iperf_defaults(test); /* sets defaults */
if (iperf_parse_arguments(test, argc, argv) < 0) {
iperf_err(test, "parameter error - %s", iperf_strerror(i_errno));
fprintf(stderr, "\n");
usage();
exit(1);
}
if (run(test) < 0)
iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
iperf_free_test(test);
return 0;
}
static jmp_buf sigend_jmp_buf;
static void __attribute__ ((noreturn))
sigend_handler(int sig)
{
longjmp(sigend_jmp_buf, 1);
}
/**************************************************************************/
static int
run(struct iperf_test *test)
{
/* Termination signals. */
iperf_catch_sigend(sigend_handler);
if (setjmp(sigend_jmp_buf))
iperf_got_sigend(test);
/* Ignore SIGPIPE to simplify error handling */
signal(SIGPIPE, SIG_IGN);
switch (test->role) {
case 's':
if (test->daemon) {
int rc;
rc = daemon(0, 0);
if (rc < 0) {
i_errno = IEDAEMON;
iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
}
}
if (iperf_create_pidfile(test) < 0) {
i_errno = IEPIDFILE;
iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
}
for (;;) {
int rc;
rc = iperf_run_server(test);
test->server_last_run_rc = rc;
if (rc < 0) {
iperf_err(test, "error - %s", iperf_strerror(i_errno));
if (test->json_output) {
if (iperf_json_finish(test) < 0)
return -1;
}
iflush(test);
if (rc < -1) {
iperf_errexit(test, "exiting");
}
}
iperf_reset_test(test);
if (iperf_get_test_one_off(test) && rc != 2) {
/* Authentication failure doesn't count for 1-off test */
if (rc < 0 && i_errno == IEAUTHTEST) {
continue;
}
break;
}
}
iperf_delete_pidfile(test);
break;
case 'c':
if (iperf_create_pidfile(test) < 0) {
i_errno = IEPIDFILE;
iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
}
if (iperf_run_client(test) < 0)
iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
iperf_delete_pidfile(test);
break;
default:
usage();
break;
}
iperf_catch_sigend(SIG_DFL);
signal(SIGPIPE, SIG_DFL);
return 0;
}
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