1 /*
2 * iperf, Copyright (c) 2014, 2015, 2017, 2019, 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 "units.h"
48 #include "iperf_locale.h"
49 #include "net.h"
50
51
52 static int run(struct iperf_test *test);
53
54
55 /**************************************************************************/
56 int
main(int argc,char ** argv)57 main(int argc, char **argv)
58 {
59 struct iperf_test *test;
60
61 // XXX: Setting the process affinity requires root on most systems.
62 // Is this a feature we really need?
63 #ifdef TEST_PROC_AFFINITY
64 /* didnt seem to work.... */
65 /*
66 * increasing the priority of the process to minimise packet generation
67 * delay
68 */
69 int rc = setpriority(PRIO_PROCESS, 0, -15);
70
71 if (rc < 0) {
72 perror("setpriority:");
73 fprintf(stderr, "setting priority to valid level\n");
74 rc = setpriority(PRIO_PROCESS, 0, 0);
75 }
76
77 /* setting the affinity of the process */
78 cpu_set_t cpu_set;
79 int affinity = -1;
80 int ncores = 1;
81
82 sched_getaffinity(0, sizeof(cpu_set_t), &cpu_set);
83 if (errno)
84 perror("couldn't get affinity:");
85
86 if ((ncores = sysconf(_SC_NPROCESSORS_CONF)) <= 0)
87 err("sysconf: couldn't get _SC_NPROCESSORS_CONF");
88
89 CPU_ZERO(&cpu_set);
90 CPU_SET(affinity, &cpu_set);
91 if (sched_setaffinity(0, sizeof(cpu_set_t), &cpu_set) != 0)
92 err("couldn't change CPU affinity");
93 #endif
94
95 test = iperf_new_test();
96 if (!test)
97 iperf_errexit(NULL, "create new test error - %s", iperf_strerror(i_errno));
98 iperf_defaults(test); /* sets defaults */
99
100 if (iperf_parse_arguments(test, argc, argv) < 0) {
101 iperf_err(test, "parameter error - %s", iperf_strerror(i_errno));
102 fprintf(stderr, "\n");
103 usage_long(stdout);
104 exit(1);
105 }
106
107 if (run(test) < 0)
108 iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
109
110 iperf_free_test(test);
111
112 return 0;
113 }
114
115
116 static jmp_buf sigend_jmp_buf;
117
118 static void __attribute__ ((noreturn))
sigend_handler(int sig)119 sigend_handler(int sig)
120 {
121 longjmp(sigend_jmp_buf, 1);
122 }
123
124 /**************************************************************************/
125 static int
run(struct iperf_test * test)126 run(struct iperf_test *test)
127 {
128 /* Termination signals. */
129 iperf_catch_sigend(sigend_handler);
130 if (setjmp(sigend_jmp_buf))
131 iperf_got_sigend(test);
132
133 /* Ignore SIGPIPE to simplify error handling */
134 signal(SIGPIPE, SIG_IGN);
135
136 switch (test->role) {
137 case 's':
138 if (test->daemon) {
139 int rc;
140 rc = daemon(0, 0);
141 if (rc < 0) {
142 i_errno = IEDAEMON;
143 iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
144 }
145 }
146 if (iperf_create_pidfile(test) < 0) {
147 i_errno = IEPIDFILE;
148 iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
149 }
150 for (;;) {
151 int rc;
152 rc = iperf_run_server(test);
153 if (rc < 0) {
154 iperf_err(test, "error - %s", iperf_strerror(i_errno));
155 if (rc < -1) {
156 iperf_errexit(test, "exiting");
157 }
158 }
159 iperf_reset_test(test);
160 if (iperf_get_test_one_off(test)) {
161 /* Authentication failure doesn't count for 1-off test */
162 if (rc < 0 && i_errno == IEAUTHTEST) {
163 continue;
164 }
165 break;
166 }
167 }
168 iperf_delete_pidfile(test);
169 break;
170 case 'c':
171 if (iperf_run_client(test) < 0)
172 iperf_errexit(test, "error - %s", iperf_strerror(i_errno));
173 break;
174 default:
175 usage();
176 break;
177 }
178
179 iperf_catch_sigend(SIG_DFL);
180 signal(SIGPIPE, SIG_DFL);
181
182 return 0;
183 }
184