1: /*
2: * iperf, Copyright (c) 2014-2022, The Regents of the University of
3: * California, through Lawrence Berkeley National Laboratory (subject
4: * to receipt of any required approvals from the U.S. Dept. of
5: * Energy). All rights reserved.
6: *
7: * If you have questions about your rights to use or distribute this
8: * software, please contact Berkeley Lab's Technology Transfer
9: * Department at TTD@lbl.gov.
10: *
11: * NOTICE. This software is owned by the U.S. Department of Energy.
12: * As such, the U.S. Government has been granted for itself and others
13: * acting on its behalf a paid-up, nonexclusive, irrevocable,
14: * worldwide license in the Software to reproduce, prepare derivative
15: * works, and perform publicly and display publicly. Beginning five
16: * (5) years after the date permission to assert copyright is obtained
17: * from the U.S. Department of Energy, and subject to any subsequent
18: * five (5) year renewals, the U.S. Government is granted for itself
19: * and others acting on its behalf a paid-up, nonexclusive,
20: * irrevocable, worldwide license in the Software to reproduce,
21: * prepare derivative works, distribute copies to the public, perform
22: * publicly and display publicly, and to permit others to do so.
23: *
24: * This code is distributed under a BSD style license, see the LICENSE
25: * file for complete information.
26: */
27: #include "iperf_config.h"
28:
29: #include <stdio.h>
30: #include <stdlib.h>
31: #include <string.h>
32: #include <getopt.h>
33: #include <errno.h>
34: #include <signal.h>
35: #include <unistd.h>
36: #ifdef HAVE_STDINT_H
37: #include <stdint.h>
38: #endif
39: #include <sys/socket.h>
40: #include <sys/types.h>
41: #include <netinet/in.h>
42: #include <arpa/inet.h>
43: #include <netdb.h>
44:
45: #include "iperf.h"
46: #include "iperf_api.h"
47: #include "iperf_util.h"
48: #include "iperf_locale.h"
49: #include "net.h"
50: #include "units.h"
51:
52:
53: static int run(struct iperf_test *test);
54:
55:
56: /**************************************************************************/
57: int
58: main(int argc, char **argv)
59: {
60: struct iperf_test *test;
61:
62: // XXX: Setting the process affinity requires root on most systems.
63: // Is this a feature we really need?
64: #ifdef TEST_PROC_AFFINITY
65: /* didn't seem to work.... */
66: /*
67: * increasing the priority of the process to minimise packet generation
68: * delay
69: */
70: int rc = setpriority(PRIO_PROCESS, 0, -15);
71:
72: if (rc < 0) {
73: perror("setpriority:");
74: fprintf(stderr, "setting priority to valid level\n");
75: rc = setpriority(PRIO_PROCESS, 0, 0);
76: }
77:
78: /* setting the affinity of the process */
79: cpu_set_t cpu_set;
80: int affinity = -1;
81: int ncores = 1;
82:
83: sched_getaffinity(0, sizeof(cpu_set_t), &cpu_set);
84: if (errno)
85: perror("couldn't get affinity:");
86:
87: if ((ncores = sysconf(_SC_NPROCESSORS_CONF)) <= 0)
88: err("sysconf: couldn't get _SC_NPROCESSORS_CONF");
89:
90: CPU_ZERO(&cpu_set);
91: CPU_SET(affinity, &cpu_set);
92: if (sched_setaffinity(0, sizeof(cpu_set_t), &cpu_set) != 0)
93: err("couldn't change CPU affinity");
94: #endif
95:
96: test = iperf_new_test();
97: if (!test)
98: iperf_errexit(NULL, "create new test error - %s", iperf_strerror(i_errno));
99: iperf_defaults(test); /* sets defaults */
100:
101: if (iperf_parse_arguments(test, argc, argv) < 0) {
102: iperf_err(test, "parameter error - %s", iperf_strerror(i_errno));
103: fprintf(stderr, "\n");
104: usage();
105: exit(1);
106: }
107:
108: if (run(test) < 0)
109: iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
110:
111: iperf_free_test(test);
112:
113: return 0;
114: }
115:
116:
117: static jmp_buf sigend_jmp_buf;
118:
119: static void __attribute__ ((noreturn))
120: sigend_handler(int sig)
121: {
122: longjmp(sigend_jmp_buf, 1);
123: }
124:
125: /**************************************************************************/
126: static int
127: run(struct iperf_test *test)
128: {
129: /* Termination signals. */
130: iperf_catch_sigend(sigend_handler);
131: if (setjmp(sigend_jmp_buf))
132: iperf_got_sigend(test);
133:
134: /* Ignore SIGPIPE to simplify error handling */
135: signal(SIGPIPE, SIG_IGN);
136:
137: switch (test->role) {
138: case 's':
139: if (test->daemon) {
140: int rc;
141: rc = daemon(0, 0);
142: if (rc < 0) {
143: i_errno = IEDAEMON;
144: iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
145: }
146: }
147: if (iperf_create_pidfile(test) < 0) {
148: i_errno = IEPIDFILE;
149: iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
150: }
151: for (;;) {
152: int rc;
153: rc = iperf_run_server(test);
154: test->server_last_run_rc = rc;
155: if (rc < 0) {
156: iperf_err(test, "error - %s", iperf_strerror(i_errno));
157: if (test->json_output) {
158: if (iperf_json_finish(test) < 0)
159: return -1;
160: }
161: iflush(test);
162:
163: if (rc < -1) {
164: iperf_errexit(test, "exiting");
165: }
166: }
167: iperf_reset_test(test);
168: if (iperf_get_test_one_off(test) && rc != 2) {
169: /* Authentication failure doesn't count for 1-off test */
170: if (rc < 0 && i_errno == IEAUTHTEST) {
171: continue;
172: }
173: break;
174: }
175: }
176: iperf_delete_pidfile(test);
177: break;
178: case 'c':
179: if (iperf_create_pidfile(test) < 0) {
180: i_errno = IEPIDFILE;
181: iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
182: }
183: if (iperf_run_client(test) < 0)
184: iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
185: iperf_delete_pidfile(test);
186: break;
187: default:
188: usage();
189: break;
190: }
191:
192: iperf_catch_sigend(SIG_DFL);
193: signal(SIGPIPE, SIG_DFL);
194:
195: return 0;
196: }
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