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: /* iperf_server_api.c: Functions to be used by an iperf server
28: */
29:
30: #include <stdio.h>
31: #include <stdlib.h>
32: #include <string.h>
33: #include <getopt.h>
34: #include <errno.h>
35: #include <unistd.h>
36: #include <assert.h>
37: #include <fcntl.h>
38: #include <sys/socket.h>
39: #include <sys/types.h>
40: #include <netinet/in.h>
41: #include <arpa/inet.h>
42: #include <netdb.h>
43: #ifdef HAVE_STDINT_H
44: #include <stdint.h>
45: #endif
46: #include <sys/time.h>
47: #include <sys/resource.h>
48: #include <sched.h>
49: #include <setjmp.h>
50:
51: #include "iperf.h"
52: #include "iperf_api.h"
53: #include "iperf_udp.h"
54: #include "iperf_tcp.h"
55: #include "iperf_util.h"
56: #include "timer.h"
57: #include "iperf_time.h"
58: #include "net.h"
59: #include "units.h"
60: #include "iperf_util.h"
61: #include "iperf_locale.h"
62:
63: #if defined(HAVE_TCP_CONGESTION)
64: #if !defined(TCP_CA_NAME_MAX)
65: #define TCP_CA_NAME_MAX 16
66: #endif /* TCP_CA_NAME_MAX */
67: #endif /* HAVE_TCP_CONGESTION */
68:
69: int
70: iperf_server_listen(struct iperf_test *test)
71: {
72: retry:
73: if((test->listener = netannounce(test->settings->domain, Ptcp, test->bind_address, test->bind_dev, test->server_port)) < 0) {
74: if (errno == EAFNOSUPPORT && (test->settings->domain == AF_INET6 || test->settings->domain == AF_UNSPEC)) {
75: /* If we get "Address family not supported by protocol", that
76: ** probably means we were compiled with IPv6 but the running
77: ** kernel does not actually do IPv6. This is not too unusual,
78: ** v6 support is and perhaps always will be spotty.
79: */
80: warning("this system does not seem to support IPv6 - trying IPv4");
81: test->settings->domain = AF_INET;
82: goto retry;
83: } else {
84: i_errno = IELISTEN;
85: return -1;
86: }
87: }
88:
89: if (!test->json_output) {
90: if (test->server_last_run_rc != 2)
91: test->server_test_number +=1;
92: if (test->debug || test->server_last_run_rc != 2) {
93: iperf_printf(test, "-----------------------------------------------------------\n");
94: iperf_printf(test, "Server listening on %d (test #%d)\n", test->server_port, test->server_test_number);
95: iperf_printf(test, "-----------------------------------------------------------\n");
96: if (test->forceflush)
97: iflush(test);
98: }
99: }
100:
101: FD_ZERO(&test->read_set);
102: FD_ZERO(&test->write_set);
103: FD_SET(test->listener, &test->read_set);
104: if (test->listener > test->max_fd) test->max_fd = test->listener;
105:
106: return 0;
107: }
108:
109: int
110: iperf_accept(struct iperf_test *test)
111: {
112: int s;
113: signed char rbuf = ACCESS_DENIED;
114: socklen_t len;
115: struct sockaddr_storage addr;
116:
117: len = sizeof(addr);
118: if ((s = accept(test->listener, (struct sockaddr *) &addr, &len)) < 0) {
119: i_errno = IEACCEPT;
120: return -1;
121: }
122:
123: if (test->ctrl_sck == -1) {
124: /* Server free, accept new client */
125: test->ctrl_sck = s;
126: // set TCP_NODELAY for lower latency on control messages
127: int flag = 1;
128: if (setsockopt(test->ctrl_sck, IPPROTO_TCP, TCP_NODELAY, (char *) &flag, sizeof(int))) {
129: i_errno = IESETNODELAY;
130: return -1;
131: }
132:
133: #if defined(HAVE_TCP_USER_TIMEOUT)
134: int opt;
135: if ((opt = test->settings->snd_timeout)) {
136: if (setsockopt(s, IPPROTO_TCP, TCP_USER_TIMEOUT, &opt, sizeof(opt)) < 0) {
137: i_errno = IESETUSERTIMEOUT;
138: return -1;
139: }
140: }
141: #endif /* HAVE_TCP_USER_TIMEOUT */
142:
143: if (Nread(test->ctrl_sck, test->cookie, COOKIE_SIZE, Ptcp) != COOKIE_SIZE) {
144: /*
145: * Note this error covers both the case of a system error
146: * or the inability to read the correct amount of data
147: * (i.e. timed out).
148: */
149: i_errno = IERECVCOOKIE;
150: return -1;
151: }
152: FD_SET(test->ctrl_sck, &test->read_set);
153: if (test->ctrl_sck > test->max_fd) test->max_fd = test->ctrl_sck;
154:
155: if (iperf_set_send_state(test, PARAM_EXCHANGE) != 0)
156: return -1;
157: if (iperf_exchange_parameters(test) < 0)
158: return -1;
159: if (test->server_affinity != -1)
160: if (iperf_setaffinity(test, test->server_affinity) != 0)
161: return -1;
162: if (test->on_connect)
163: test->on_connect(test);
164: } else {
165: /*
166: * Don't try to read from the socket. It could block an ongoing test.
167: * Just send ACCESS_DENIED.
168: * Also, if sending failed, don't return an error, as the request is not related
169: * to the ongoing test, and returning an error will terminate the test.
170: */
171: if (Nwrite(s, (char*) &rbuf, sizeof(rbuf), Ptcp) < 0) {
172: if (test->debug)
173: printf("failed to send ACCESS_DENIED to an unsolicited connection request during active test\n");
174: } else {
175: if (test->debug)
176: printf("successfully sent ACCESS_DENIED to an unsolicited connection request during active test\n");
177: }
178: close(s);
179: }
180:
181: return 0;
182: }
183:
184:
185: /**************************************************************************/
186: int
187: iperf_handle_message_server(struct iperf_test *test)
188: {
189: int rval;
190: struct iperf_stream *sp;
191:
192: // XXX: Need to rethink how this behaves to fit API
193: if ((rval = Nread(test->ctrl_sck, (char*) &test->state, sizeof(signed char), Ptcp)) <= 0) {
194: if (rval == 0) {
195: iperf_err(test, "the client has unexpectedly closed the connection");
196: i_errno = IECTRLCLOSE;
197: test->state = IPERF_DONE;
198: return 0;
199: } else {
200: i_errno = IERECVMESSAGE;
201: return -1;
202: }
203: }
204:
205: switch(test->state) {
206: case TEST_START:
207: break;
208: case TEST_END:
209: test->done = 1;
210: cpu_util(test->cpu_util);
211: test->stats_callback(test);
212: SLIST_FOREACH(sp, &test->streams, streams) {
213: FD_CLR(sp->socket, &test->read_set);
214: FD_CLR(sp->socket, &test->write_set);
215: close(sp->socket);
216: }
217: test->reporter_callback(test);
218: if (iperf_set_send_state(test, EXCHANGE_RESULTS) != 0)
219: return -1;
220: if (iperf_exchange_results(test) < 0)
221: return -1;
222: if (iperf_set_send_state(test, DISPLAY_RESULTS) != 0)
223: return -1;
224: if (test->on_test_finish)
225: test->on_test_finish(test);
226: break;
227: case IPERF_DONE:
228: break;
229: case CLIENT_TERMINATE:
230: i_errno = IECLIENTTERM;
231:
232: // Temporarily be in DISPLAY_RESULTS phase so we can get
233: // ending summary statistics.
234: signed char oldstate = test->state;
235: cpu_util(test->cpu_util);
236: test->state = DISPLAY_RESULTS;
237: test->reporter_callback(test);
238: test->state = oldstate;
239:
240: // XXX: Remove this line below!
241: iperf_err(test, "the client has terminated");
242: SLIST_FOREACH(sp, &test->streams, streams) {
243: FD_CLR(sp->socket, &test->read_set);
244: FD_CLR(sp->socket, &test->write_set);
245: close(sp->socket);
246: }
247: test->state = IPERF_DONE;
248: break;
249: default:
250: i_errno = IEMESSAGE;
251: return -1;
252: }
253:
254: return 0;
255: }
256:
257: static void
258: server_timer_proc(TimerClientData client_data, struct iperf_time *nowP)
259: {
260: struct iperf_test *test = client_data.p;
261: struct iperf_stream *sp;
262:
263: test->timer = NULL;
264: if (test->done)
265: return;
266: test->done = 1;
267: /* Free streams */
268: while (!SLIST_EMPTY(&test->streams)) {
269: sp = SLIST_FIRST(&test->streams);
270: SLIST_REMOVE_HEAD(&test->streams, streams);
271: close(sp->socket);
272: iperf_free_stream(sp);
273: }
274: close(test->ctrl_sck);
275: test->ctrl_sck = -1;
276: }
277:
278: static void
279: server_stats_timer_proc(TimerClientData client_data, struct iperf_time *nowP)
280: {
281: struct iperf_test *test = client_data.p;
282:
283: if (test->done)
284: return;
285: if (test->stats_callback)
286: test->stats_callback(test);
287: }
288:
289: static void
290: server_reporter_timer_proc(TimerClientData client_data, struct iperf_time *nowP)
291: {
292: struct iperf_test *test = client_data.p;
293:
294: if (test->done)
295: return;
296: if (test->reporter_callback)
297: test->reporter_callback(test);
298: }
299:
300: static int
301: create_server_timers(struct iperf_test * test)
302: {
303: struct iperf_time now;
304: TimerClientData cd;
305: int max_rtt = 4; /* seconds */
306: int state_transitions = 10; /* number of state transitions in iperf3 */
307: int grace_period = max_rtt * state_transitions;
308:
309: if (iperf_time_now(&now) < 0) {
310: i_errno = IEINITTEST;
311: return -1;
312: }
313: cd.p = test;
314: test->timer = test->stats_timer = test->reporter_timer = NULL;
315: if (test->duration != 0 ) {
316: test->done = 0;
317: test->timer = tmr_create(&now, server_timer_proc, cd, (test->duration + test->omit + grace_period) * SEC_TO_US, 0);
318: if (test->timer == NULL) {
319: i_errno = IEINITTEST;
320: return -1;
321: }
322: }
323:
324: test->stats_timer = test->reporter_timer = NULL;
325: if (test->stats_interval != 0) {
326: test->stats_timer = tmr_create(&now, server_stats_timer_proc, cd, test->stats_interval * SEC_TO_US, 1);
327: if (test->stats_timer == NULL) {
328: i_errno = IEINITTEST;
329: return -1;
330: }
331: }
332: if (test->reporter_interval != 0) {
333: test->reporter_timer = tmr_create(&now, server_reporter_timer_proc, cd, test->reporter_interval * SEC_TO_US, 1);
334: if (test->reporter_timer == NULL) {
335: i_errno = IEINITTEST;
336: return -1;
337: }
338: }
339: return 0;
340: }
341:
342: static void
343: server_omit_timer_proc(TimerClientData client_data, struct iperf_time *nowP)
344: {
345: struct iperf_test *test = client_data.p;
346:
347: test->omit_timer = NULL;
348: test->omitting = 0;
349: iperf_reset_stats(test);
350: if (test->verbose && !test->json_output && test->reporter_interval == 0)
351: iperf_printf(test, "%s", report_omit_done);
352:
353: /* Reset the timers. */
354: if (test->stats_timer != NULL)
355: tmr_reset(nowP, test->stats_timer);
356: if (test->reporter_timer != NULL)
357: tmr_reset(nowP, test->reporter_timer);
358: }
359:
360: static int
361: create_server_omit_timer(struct iperf_test * test)
362: {
363: struct iperf_time now;
364: TimerClientData cd;
365:
366: if (test->omit == 0) {
367: test->omit_timer = NULL;
368: test->omitting = 0;
369: } else {
370: if (iperf_time_now(&now) < 0) {
371: i_errno = IEINITTEST;
372: return -1;
373: }
374: test->omitting = 1;
375: cd.p = test;
376: test->omit_timer = tmr_create(&now, server_omit_timer_proc, cd, test->omit * SEC_TO_US, 0);
377: if (test->omit_timer == NULL) {
378: i_errno = IEINITTEST;
379: return -1;
380: }
381: }
382:
383: return 0;
384: }
385:
386: static void
387: cleanup_server(struct iperf_test *test)
388: {
389: struct iperf_stream *sp;
390:
391: /* Close open streams */
392: SLIST_FOREACH(sp, &test->streams, streams) {
393: if (sp->socket > -1) {
394: FD_CLR(sp->socket, &test->read_set);
395: FD_CLR(sp->socket, &test->write_set);
396: close(sp->socket);
397: sp->socket = -1;
398: }
399: }
400:
401: /* Close open test sockets */
402: if (test->ctrl_sck > -1) {
403: close(test->ctrl_sck);
404: test->ctrl_sck = -1;
405: }
406: if (test->listener > -1) {
407: close(test->listener);
408: test->listener = -1;
409: }
410: if (test->prot_listener > -1) { // May remain open if create socket failed
411: close(test->prot_listener);
412: test->prot_listener = -1;
413: }
414:
415: /* Cancel any remaining timers. */
416: if (test->stats_timer != NULL) {
417: tmr_cancel(test->stats_timer);
418: test->stats_timer = NULL;
419: }
420: if (test->reporter_timer != NULL) {
421: tmr_cancel(test->reporter_timer);
422: test->reporter_timer = NULL;
423: }
424: if (test->omit_timer != NULL) {
425: tmr_cancel(test->omit_timer);
426: test->omit_timer = NULL;
427: }
428: if (test->congestion_used != NULL) {
429: free(test->congestion_used);
430: test->congestion_used = NULL;
431: }
432: if (test->timer != NULL) {
433: tmr_cancel(test->timer);
434: test->timer = NULL;
435: }
436: }
437:
438:
439: int
440: iperf_run_server(struct iperf_test *test)
441: {
442: int result, s;
443: int send_streams_accepted, rec_streams_accepted;
444: int streams_to_send = 0, streams_to_rec = 0;
445: #if defined(HAVE_TCP_CONGESTION)
446: int saved_errno;
447: #endif /* HAVE_TCP_CONGESTION */
448: fd_set read_set, write_set;
449: struct iperf_stream *sp;
450: struct iperf_time now;
451: struct iperf_time last_receive_time;
452: struct iperf_time diff_time;
453: struct timeval* timeout;
454: struct timeval used_timeout;
455: int flag;
456: int64_t t_usecs;
457: int64_t timeout_us;
458: int64_t rcv_timeout_us;
459:
460: if (test->logfile)
461: if (iperf_open_logfile(test) < 0)
462: return -2;
463:
464: if (test->affinity != -1)
465: if (iperf_setaffinity(test, test->affinity) != 0) {
466: cleanup_server(test);
467: return -2;
468: }
469:
470: if (test->json_output)
471: if (iperf_json_start(test) < 0) {
472: cleanup_server(test);
473: return -2;
474: }
475:
476: if (test->json_output) {
477: cJSON_AddItemToObject(test->json_start, "version", cJSON_CreateString(version));
478: cJSON_AddItemToObject(test->json_start, "system_info", cJSON_CreateString(get_system_info()));
479: } else if (test->verbose) {
480: iperf_printf(test, "%s\n", version);
481: iperf_printf(test, "%s", "");
482: iperf_printf(test, "%s\n", get_system_info());
483: iflush(test);
484: }
485:
486: // Open socket and listen
487: if (iperf_server_listen(test) < 0) {
488: cleanup_server(test);
489: return -2;
490: }
491:
492: iperf_time_now(&last_receive_time); // Initialize last time something was received
493:
494: test->state = IPERF_START;
495: send_streams_accepted = 0;
496: rec_streams_accepted = 0;
497: rcv_timeout_us = (test->settings->rcv_timeout.secs * SEC_TO_US) + test->settings->rcv_timeout.usecs;
498:
499: while (test->state != IPERF_DONE) {
500:
501: // Check if average transfer rate was exceeded (condition set in the callback routines)
502: if (test->bitrate_limit_exceeded) {
503: cleanup_server(test);
504: i_errno = IETOTALRATE;
505: return -1;
506: }
507:
508: memcpy(&read_set, &test->read_set, sizeof(fd_set));
509: memcpy(&write_set, &test->write_set, sizeof(fd_set));
510:
511: iperf_time_now(&now);
512: timeout = tmr_timeout(&now);
513:
514: // Ensure select() will timeout to allow handling error cases that require server restart
515: if (test->state == IPERF_START) { // In idle mode server may need to restart
516: if (timeout == NULL && test->settings->idle_timeout > 0) {
517: used_timeout.tv_sec = test->settings->idle_timeout;
518: used_timeout.tv_usec = 0;
519: timeout = &used_timeout;
520: }
521: } else if (test->mode != SENDER) { // In non-reverse active mode server ensures data is received
522: timeout_us = -1;
523: if (timeout != NULL) {
524: used_timeout.tv_sec = timeout->tv_sec;
525: used_timeout.tv_usec = timeout->tv_usec;
526: timeout_us = (timeout->tv_sec * SEC_TO_US) + timeout->tv_usec;
527: }
528: if (timeout_us < 0 || timeout_us > rcv_timeout_us) {
529: used_timeout.tv_sec = test->settings->rcv_timeout.secs;
530: used_timeout.tv_usec = test->settings->rcv_timeout.usecs;
531: }
532: timeout = &used_timeout;
533: }
534:
535: result = select(test->max_fd + 1, &read_set, &write_set, NULL, timeout);
536: if (result < 0 && errno != EINTR) {
537: cleanup_server(test);
538: i_errno = IESELECT;
539: return -1;
540: } else if (result == 0) {
541: // If nothing was received during the specified time (per state)
542: // then probably something got stack either at the client, server or network,
543: // and Test should be forced to end.
544: iperf_time_now(&now);
545: t_usecs = 0;
546: if (iperf_time_diff(&now, &last_receive_time, &diff_time) == 0) {
547: t_usecs = iperf_time_in_usecs(&diff_time);
548: if (test->state == IPERF_START) {
549: if (test->settings->idle_timeout > 0 && t_usecs >= test->settings->idle_timeout * SEC_TO_US) {
550: test->server_forced_idle_restarts_count += 1;
551: if (test->debug)
552: printf("Server restart (#%d) in idle state as no connection request was received for %d sec\n",
553: test->server_forced_idle_restarts_count, test->settings->idle_timeout);
554: cleanup_server(test);
555: if ( iperf_get_test_one_off(test) ) {
556: if (test->debug)
557: printf("No connection request was received for %d sec in one-off mode; exiting.\n",
558: test->settings->idle_timeout);
559: exit(0);
560: }
561:
562: return 2;
563: }
564: }
565: else if (test->mode != SENDER && t_usecs > rcv_timeout_us) {
566: test->server_forced_no_msg_restarts_count += 1;
567: i_errno = IENOMSG;
568: if (iperf_get_verbose(test))
569: iperf_err(test, "Server restart (#%d) during active test due to idle timeout for receiving data",
570: test->server_forced_no_msg_restarts_count);
571: cleanup_server(test);
572: return -1;
573: }
574:
575: }
576: }
577:
578: if (result > 0) {
579: iperf_time_now(&last_receive_time);
580: if (FD_ISSET(test->listener, &read_set)) {
581: if (test->state != CREATE_STREAMS) {
582: if (iperf_accept(test) < 0) {
583: cleanup_server(test);
584: return -1;
585: }
586: FD_CLR(test->listener, &read_set);
587:
588: // Set streams number
589: if (test->mode == BIDIRECTIONAL) {
590: streams_to_send = test->num_streams;
591: streams_to_rec = test->num_streams;
592: } else if (test->mode == RECEIVER) {
593: streams_to_rec = test->num_streams;
594: streams_to_send = 0;
595: } else {
596: streams_to_send = test->num_streams;
597: streams_to_rec = 0;
598: }
599: }
600: }
601: if (FD_ISSET(test->ctrl_sck, &read_set)) {
602: if (iperf_handle_message_server(test) < 0) {
603: cleanup_server(test);
604: return -1;
605: }
606: FD_CLR(test->ctrl_sck, &read_set);
607: }
608:
609: if (test->state == CREATE_STREAMS) {
610: if (FD_ISSET(test->prot_listener, &read_set)) {
611:
612: if ((s = test->protocol->accept(test)) < 0) {
613: cleanup_server(test);
614: return -1;
615: }
616:
617: /* apply other common socket options */
618: if (iperf_common_sockopts(test, s) < 0)
619: {
620: cleanup_server(test);
621: return -1;
622: }
623:
624: if (!is_closed(s)) {
625:
626: #if defined(HAVE_TCP_USER_TIMEOUT)
627: if (test->protocol->id == Ptcp) {
628: int opt;
629: if ((opt = test->settings->snd_timeout)) {
630: if (setsockopt(s, IPPROTO_TCP, TCP_USER_TIMEOUT, &opt, sizeof(opt)) < 0) {
631: saved_errno = errno;
632: close(s);
633: cleanup_server(test);
634: errno = saved_errno;
635: i_errno = IESETUSERTIMEOUT;
636: return -1;
637: }
638: }
639: }
640: #endif /* HAVE_TCP_USER_TIMEOUT */
641:
642: #if defined(HAVE_TCP_CONGESTION)
643: if (test->protocol->id == Ptcp) {
644: if (test->congestion) {
645: if (setsockopt(s, IPPROTO_TCP, TCP_CONGESTION, test->congestion, strlen(test->congestion)) < 0) {
646: /*
647: * ENOENT means we tried to set the
648: * congestion algorithm but the algorithm
649: * specified doesn't exist. This can happen
650: * if the client and server have different
651: * congestion algorithms available. In this
652: * case, print a warning, but otherwise
653: * continue.
654: */
655: if (errno == ENOENT) {
656: warning("TCP congestion control algorithm not supported");
657: }
658: else {
659: saved_errno = errno;
660: close(s);
661: cleanup_server(test);
662: errno = saved_errno;
663: i_errno = IESETCONGESTION;
664: return -1;
665: }
666: }
667: }
668: {
669: socklen_t len = TCP_CA_NAME_MAX;
670: char ca[TCP_CA_NAME_MAX + 1];
671: int rc;
672: rc = getsockopt(s, IPPROTO_TCP, TCP_CONGESTION, ca, &len);
673: if (rc < 0 && test->congestion) {
674: saved_errno = errno;
675: close(s);
676: cleanup_server(test);
677: errno = saved_errno;
678: i_errno = IESETCONGESTION;
679: return -1;
680: }
681: /*
682: * If not the first connection, discard prior
683: * congestion algorithm name so we don't leak
684: * duplicated strings. We probably don't need
685: * the old string anyway.
686: */
687: if (test->congestion_used != NULL) {
688: free(test->congestion_used);
689: }
690: // Set actual used congestion alg, or set to unknown if could not get it
691: if (rc < 0)
692: test->congestion_used = strdup("unknown");
693: else
694: test->congestion_used = strdup(ca);
695: if (test->debug) {
696: printf("Congestion algorithm is %s\n", test->congestion_used);
697: }
698: }
699: }
700: #endif /* HAVE_TCP_CONGESTION */
701:
702: if (rec_streams_accepted != streams_to_rec) {
703: flag = 0;
704: ++rec_streams_accepted;
705: } else if (send_streams_accepted != streams_to_send) {
706: flag = 1;
707: ++send_streams_accepted;
708: }
709:
710: if (flag != -1) {
711: sp = iperf_new_stream(test, s, flag);
712: if (!sp) {
713: cleanup_server(test);
714: return -1;
715: }
716:
717: if (sp->sender)
718: FD_SET(s, &test->write_set);
719: else
720: FD_SET(s, &test->read_set);
721:
722: if (s > test->max_fd) test->max_fd = s;
723:
724: /*
725: * If the protocol isn't UDP, or even if it is but
726: * we're the receiver, set nonblocking sockets.
727: * We need this to allow a server receiver to
728: * maintain interactivity with the control channel.
729: */
730: if (test->protocol->id != Pudp ||
731: !sp->sender) {
732: setnonblocking(s, 1);
733: }
734:
735: if (test->on_new_stream)
736: test->on_new_stream(sp);
737:
738: flag = -1;
739: }
740: }
741: FD_CLR(test->prot_listener, &read_set);
742: }
743:
744:
745: if (rec_streams_accepted == streams_to_rec && send_streams_accepted == streams_to_send) {
746: if (test->protocol->id != Ptcp) {
747: FD_CLR(test->prot_listener, &test->read_set);
748: close(test->prot_listener);
749: test->prot_listener = -1;
750: } else {
751: if (test->no_delay || test->settings->mss || test->settings->socket_bufsize) {
752: FD_CLR(test->listener, &test->read_set);
753: close(test->listener);
754: test->listener = -1;
755: if ((s = netannounce(test->settings->domain, Ptcp, test->bind_address, test->bind_dev, test->server_port)) < 0) {
756: cleanup_server(test);
757: i_errno = IELISTEN;
758: return -1;
759: }
760: test->listener = s;
761: FD_SET(test->listener, &test->read_set);
762: if (test->listener > test->max_fd) test->max_fd = test->listener;
763: }
764: }
765: test->prot_listener = -1;
766:
767: /* Ensure that total requested data rate is not above limit */
768: iperf_size_t total_requested_rate = test->num_streams * test->settings->rate * (test->mode == BIDIRECTIONAL? 2 : 1);
769: if (test->settings->bitrate_limit > 0 && total_requested_rate > test->settings->bitrate_limit) {
770: if (iperf_get_verbose(test))
771: iperf_err(test, "Client total requested throughput rate of %" PRIu64 " bps exceeded %" PRIu64 " bps limit",
772: total_requested_rate, test->settings->bitrate_limit);
773: cleanup_server(test);
774: i_errno = IETOTALRATE;
775: return -1;
776: }
777:
778: // Begin calculating CPU utilization
779: cpu_util(NULL);
780:
781: if (iperf_set_send_state(test, TEST_START) != 0) {
782: cleanup_server(test);
783: return -1;
784: }
785: if (iperf_init_test(test) < 0) {
786: cleanup_server(test);
787: return -1;
788: }
789: if (create_server_timers(test) < 0) {
790: cleanup_server(test);
791: return -1;
792: }
793: if (create_server_omit_timer(test) < 0) {
794: cleanup_server(test);
795: return -1;
796: }
797: if (test->mode != RECEIVER)
798: if (iperf_create_send_timers(test) < 0) {
799: cleanup_server(test);
800: return -1;
801: }
802: if (iperf_set_send_state(test, TEST_RUNNING) != 0) {
803: cleanup_server(test);
804: return -1;
805: }
806: }
807: }
808:
809: if (test->state == TEST_RUNNING) {
810: if (test->mode == BIDIRECTIONAL) {
811: if (iperf_recv(test, &read_set) < 0) {
812: cleanup_server(test);
813: return -1;
814: }
815: if (iperf_send(test, &write_set) < 0) {
816: cleanup_server(test);
817: return -1;
818: }
819: } else if (test->mode == SENDER) {
820: // Reverse mode. Server sends.
821: if (iperf_send(test, &write_set) < 0) {
822: cleanup_server(test);
823: return -1;
824: }
825: } else {
826: // Regular mode. Server receives.
827: if (iperf_recv(test, &read_set) < 0) {
828: cleanup_server(test);
829: return -1;
830: }
831: }
832: }
833: }
834:
835: if (result == 0 ||
836: (timeout != NULL && timeout->tv_sec == 0 && timeout->tv_usec == 0)) {
837: /* Run the timers. */
838: iperf_time_now(&now);
839: tmr_run(&now);
840: }
841: }
842:
843:
844: if (test->json_output) {
845: if (iperf_json_finish(test) < 0)
846: return -1;
847: }
848:
849: iflush(test);
850: cleanup_server(test);
851:
852: if (test->server_affinity != -1)
853: if (iperf_clearaffinity(test) != 0)
854: return -1;
855:
856: return 0;
857: }
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