wme_test/wclient.c

   1 #include <errno.h>
   2 #include <sys/types.h>
   3 #include <sys/socket.h>
   4 #include <netinet/in.h>
   5 #include <arpa/inet.h>
   6 #include <netdb.h>
   7 #include <signal.h>
   8 #include <sys/wait.h>
   9 #include <stdio.h>
  10 #include <unistd.h>
  11 #include <fcntl.h>
  12 #include <time.h>
  13 #include <string.h>
  14 #include <pthread.h>
  15 #include <string.h>
  16 #include <stdlib.h>
  17 #include <stdbool.h>
  18 #include "common.h"
  19 #include <semaphore.h>
  20
  21 #define MAX_STREAMS  10
  22 #define MIN_GRANULARITY 100
  23
  24 unsigned opt_packet_size = 800;
  25 int opt_send_buf_size = -1;
  26 unsigned opt_period_usec = 10*MSEC_TO_USEC;
  27 unsigned opt_jitter = 0;
  28 char    *opt_output = "delay_stats";
  29 unsigned opt_count_sec = 0;
  30 unsigned opt_def_bandwidth = 200;
  31 unsigned opt_def_period_msec = 0;
  32 int opt_granularity_usec = MIN_GRANULARITY;
  33 bool opt_wait_for_queue_is_full; /* Don't gather any statistics until any queue is full */
  34
  35 bool some_queue_is_full = false;
  36 struct timespec reset_timestamp;
  37
  38 /* Locked when some queue is full to prevent multiple resets of
  39    statstics. */
  40 pthread_mutex_t queue_full_mutex = PTHREAD_MUTEX_INITIALIZER;
  41
  42 int ac_sockfd[AC_NUM];
  43
  44 struct receiver {
  45         pthread_t thread;
  46         unsigned received, last_received;
  47 } receivers[AC_NUM];
  48
  49 FILE* logfd;
  50 char* server_addr;
  51 char logfname[100];
  52
  53 /* maximal traffic delay in ms - 10 s*/
  54 #define MAX_DELAY_US 10000000
  55
  56 unsigned delay_stats[AC_NUM][MAX_DELAY_US/MIN_GRANULARITY];
  57 pthread_mutex_t delay_stats_mutex = PTHREAD_MUTEX_INITIALIZER;
  58
  59 /*struct ac_stats[AC_NUM] {
  60    unsigned long int min_trans_time;
  61    unsigned long int sum_trans_time;
  62    struct timespec   recv_timestamp;
  63    struct timespec   send_timestamp;
  64 };*/
  65
  66 struct stream {
  67         /* Input parameters */
  68         enum ac ac;             /*  */
  69         int bandwidth_bps;      /* bits per second */
  70         int jitter;             /* percent */
  71         /* Mulualy exclusive input parameters */
  72         int packet_size;
  73         long period_usec;       /* all time units are in microseconds */
  74         struct sockaddr_in rem_addr;
  75
  76         /* Statistics */
  77         pthread_mutex_t mutex;
  78         unsigned long long sent, really_sent, received;
  79 };
  80
  81 /*
  82 struct send_endpoint sepoint[] = {
  83         { .ac = AC_VO, .period_usec=200*MSEC_TO_USEC, .bandwidth_bps = 34*Kbit },
  84         { .ac = AC_VI, .period_usec=25*MSEC_TO_USEC, .bandwidth_bps =  480*Kbit },
  85         { .ac = AC_BE, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
  86         { .ac = AC_BK, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
  87 //      { .ac = AC_VI, .period_usec=17*MSEC_TO_USEC, .bandwidth_bps =  675*Kbit },
  88 };
  89 */
  90
  91 struct stream streams[MAX_STREAMS];
  92
  93 unsigned int nr_streams = 0;
  94
  95 sem_t sem_thread_finished;
  96
  97 bool exit_flag = false;
  98
  99 void stopper()
 100 {
 101         int i;
 102         exit_flag = true;
 103
 104         /* Interrupt all receivers */
 105         for (i=0; i < AC_NUM; i++) {
 106                 pthread_kill(receivers[i].thread, SIGUSR1);
 107         }
 108 }
 109
 110 void stream_to_text(char *stream_desc, size_t n, struct stream *stream, long long useconds)
 111 {
 112         char buf[3][12];
 113         char real[100];
 114
 115         if (useconds) {
 116                 snprintf(real, sizeof(real), "; real: %s sent %lld (%lld/s), received %lld (%lld/s)",
 117                          bandwidth_to_text(buf[0], (long long)stream->really_sent*stream->packet_size*8*SEC_TO_USEC/useconds),
 118                          stream->sent, stream->sent*SEC_TO_USEC/useconds,
 119                          stream->received, stream->received*SEC_TO_USEC/useconds);
 120         } else {
 121                 real[0]=0;
 122         }
 123
 124         snprintf(stream_desc, n, "%d: %s %s (%d bytes per %s +-%s, %d packets/s)%s",
 125                  stream-streams, ac_to_text[stream->ac], bandwidth_to_text(buf[0], stream->bandwidth_bps),
 126                  stream->packet_size, usec_to_text(buf[1], stream->period_usec),
 127                  usec_to_text(buf[2], stream->jitter*stream->period_usec/100),
 128                  (int)(SEC_TO_USEC/stream->period_usec), real);
 129 }
 130
 131 void save_results(int argc, char *argv[], int useconds)
 132 {
 133         int ac, i, maxi;
 134         const int mini = 3000/opt_granularity_usec;
 135         bool allzeros;
 136         unsigned sum[AC_NUM];
 137         double val;
 138
 139         fprintf(stderr, "Writing data to %s... ", logfname);
 140         fflush(stderr);
 141
 142         fprintf(logfd, "# Invoked as: ");
 143         for (i=0; i<argc; i++) fprintf(logfd, "%s ", argv[i]);
 144         fprintf(logfd, "\n");
 145
 146         if (useconds/SEC_TO_USEC != opt_count_sec) {
 147                 char buf[20];
 148                 usec_to_text(buf, useconds);
 149                 fprintf(logfd, "# Data gathered for %s.\n", buf);
 150         }
 151
 152         for (i = 0; i < nr_streams; i++) {
 153                 char stream_desc[200];
 154                 stream_to_text(stream_desc, sizeof(stream_desc), &streams[i], useconds);
 155                 fprintf(logfd, "# Stream %s\n", stream_desc);
 156         }
 157
 158         /* Find maximal delay */
 159         allzeros = true;
 160         for (maxi = MAX_DELAY_US/opt_granularity_usec - 1; maxi >= 0; maxi--) {
 161                 for (ac = 0; ac < AC_NUM; ac++) {
 162                         if (delay_stats[ac][maxi] != 0) allzeros = false;
 163                 }
 164                 if (!allzeros) break;
 165         }
 166         maxi++;
 167         if (maxi < mini) maxi = mini;
 168
 169         /* Calculate total number of sent packets per AC */
 170         for (ac = 0; ac < AC_NUM; ac++) sum[ac] = 0;
 171         for (i = 0; i < nr_streams; i++) {
 172                 ac = streams[i].ac;
 173                 sum[ac] += streams[i].sent;
 174         }
 175
 176 #if 0
 177         /* Write pdf */
 178         for ( i = 0 ; i < maxi; i++) {
 179                 fprintf(logfd,"\n%f", i*opt_granularity_usec/1000.0);
 180                 for (ac = 0; ac < AC_NUM; ac++) {
 181                         if (sum[ac])
 182                                 val = (double)delay_stats[ac][i]*100.0 / sum[ac];
 183                         else val = -1; /* Don't display this ac */
 184                         fprintf(logfd," %lf", val);
 185                 }
 186         }
 187
 188         fprintf(logfd,"\n\n");
 189 #endif
 190
 191         /* Write PDF */
 192         for (ac = 0; ac < AC_NUM; ac++) {
 193                 unsigned long long integral = 0, last = -1;
 194
 195                 fprintf(logfd,"%f %f\n", 0.0, 0.0);
 196
 197                 if (sum[ac] != 0) {
 198                         i=0;
 199                         while (delay_stats[ac][i] == 0) i++;
 200
 201                         for (i++; i < maxi+1; i++) {
 202                                 if (last != integral) {
 203                                         val = (double)integral*100.0 / sum[ac];
 204                                         fprintf(logfd,"%f %f\n", i*opt_granularity_usec/1000.0, val);
 205                                         last = integral;
 206                                 }
 207                                 if (i>0)
 208                                         integral += delay_stats[ac][i-1];
 209                         }
 210                 }
 211                 fprintf(logfd,"\n\n");
 212         }
 213
 214         fprintf(stderr, "finished.\n");
 215         fclose(logfd);
 216
 217         exit(0);
 218 }
 219
 220 static inline
 221 void timespec_add (struct timespec *sum, const struct timespec *left,
 222               const struct timespec *right)
 223 {
 224         sum->tv_sec = left->tv_sec + right->tv_sec;
 225         sum->tv_nsec = left->tv_nsec + right->tv_nsec;
 226
 227         if (sum->tv_nsec >= 1000000000){
 228                 ++sum->tv_sec;
 229                 sum->tv_nsec -= 1000000000;
 230         }
 231 }
 232
 233 static inline
 234 void timespec_sub (struct timespec *diff, const struct timespec *left,
 235               const struct timespec *right)
 236 {
 237         diff->tv_sec = left->tv_sec - right->tv_sec;
 238         diff->tv_nsec = left->tv_nsec - right->tv_nsec;
 239
 240         if (diff->tv_nsec < 0){
 241                   --diff->tv_sec;
 242                   diff->tv_nsec += 1000000000;
 243         }
 244 }
 245
 246 static inline long long timespec_sub_usec(const struct timespec *left,
 247                                           const struct timespec *right)
 248 {
 249         struct timespec result;
 250         timespec_sub(&result, left, right);
 251         return (long long)result.tv_sec * SEC_TO_USEC +
 252                 result.tv_nsec / USEC_TO_NSEC;
 253 }
 254
 255 static inline long long timespec2usec(const struct timespec *ts)
 256 {
 257         return ts->tv_sec * SEC_TO_USEC + ts->tv_nsec / USEC_TO_NSEC;
 258 }
 259
 260
 261 int create_ac_socket(unsigned int ac)
 262 {
 263         int sockfd;
 264         unsigned int yes=1, tos;
 265
 266
 267         if ((sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
 268         {
 269                 perror("Unable to open socket");
 270                 return -1;
 271         }
 272         if (fcntl(sockfd, F_SETFL, O_NONBLOCK) != 0) {
 273                 perror("set non-blocking socket");
 274                 return -1;
 275         }
 276         if (setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(int)) == -1) {
 277                 perror("Unable to set socket");
 278                 return -1;
 279         }
 280
 281         if (opt_send_buf_size >= 0) {
 282                 if (setsockopt(sockfd,SOL_SOCKET,SO_SNDBUF,&opt_send_buf_size,sizeof(opt_send_buf_size)) == -1) {
 283                         perror("Unable to set socket buffer size");
 284                         return -1;
 285                 }
 286         }
 287
 288
 289         //tos = ((AC_NUM - ac) *2 - 1)*32;
 290         tos = ac_to_tos[ac];
 291         if (setsockopt(sockfd, SOL_IP, IP_TOS, &tos, sizeof(tos))) {
 292                 perror("Unable to set TOS");
 293                 close(sockfd);
 294                 return -1;
 295         }
 296
 297         return sockfd;
 298 }
 299
 300 void empty_handler()
 301 {
 302 }
 303
 304 void reset_statistics()
 305 {
 306         int i;
 307         for (i = 0; i < nr_streams; i++) {
 308                 pthread_mutex_lock(&streams[i].mutex);
 309                 streams[i].sent = 0;
 310                 streams[i].really_sent = 0;
 311                 streams[i].received = 0;
 312                 pthread_mutex_unlock(&streams[i].mutex);
 313         }
 314         pthread_mutex_lock(&delay_stats_mutex);
 315         clock_gettime(CLOCK_MONOTONIC, &reset_timestamp);
 316         memset(delay_stats, 0, sizeof(delay_stats));
 317         pthread_mutex_unlock(&delay_stats_mutex);
 318 }
 319
 320 void* receiver(void* queue)
 321 {
 322         struct msg_t    msg;
 323         struct  sockaddr_in rem_addr;
 324         int     mlen, ret;
 325         unsigned int ac, rem_addr_length;
 326         long long int trans_time_usec, client_to_server_usec, server_to_client_usec;
 327         long long int min_trans_time;
 328         struct timespec send_timestamp, server_timestamp, recv_timestamp;
 329         fd_set fdset;
 330
 331         min_trans_time = ~0;
 332
 333         block_signals();
 334         set_rt_prio(99);
 335
 336         ac = (int)queue;
 337         rem_addr_length = sizeof(rem_addr);
 338         FD_ZERO(&fdset);
 339         while (!exit_flag) {
 340                 FD_SET(ac_sockfd[ac], &fdset);
 341                 ret = select(ac_sockfd[ac]+1, &fdset, NULL, NULL, NULL);
 342                 if (ret < 0) {
 343                         if (errno == EINTR) continue;
 344                         perror("receiver select");
 345                         goto out;
 346                 }
 347                 mlen = recvfrom(ac_sockfd[ac], &msg, sizeof(msg), 0,
 348                                 (struct sockaddr*)&rem_addr, &rem_addr_length);
 349                 if (mlen < 0) {
 350                         perror("Chyba pri prijimani pozadavku");
 351                         goto out;
 352                 }
 353                 clock_gettime(CLOCK_MONOTONIC,&recv_timestamp);
 354                 send_timestamp = msg.send_timestamp;
 355 /*              server_timestamp = msg.sendback_timestamp; */
 356
 357                 /* Check whether this message was sent after reset_statistics() */
 358
 359                 if ((ret = timespec_sub_usec(&send_timestamp, &reset_timestamp)) < 0) {
 360                         continue; /* If so, don't count it */
 361                 }
 362
 363                 trans_time_usec = timespec_sub_usec(&recv_timestamp ,&send_timestamp);
 364                 client_to_server_usec = timespec_sub_usec(&server_timestamp, &send_timestamp);
 365                 server_to_client_usec = timespec_sub_usec(&recv_timestamp, &server_timestamp);
 366
 367                 trans_time_usec /= 2;
 368
 369                 if (trans_time_usec < MAX_DELAY_US) {
 370                         pthread_mutex_lock(&delay_stats_mutex);
 371                         delay_stats[ac][trans_time_usec/opt_granularity_usec]++;
 372                         pthread_mutex_unlock(&delay_stats_mutex);
 373                 }
 374                 receivers[ac].received++;
 375                 pthread_mutex_lock(&streams[msg.stream].mutex);
 376                 streams[msg.stream].received++;
 377                 pthread_mutex_unlock(&streams[msg.stream].mutex);
 378
 379                 /*if (trans_time_nsec < min_trans_time)
 380                         min_trans_time = trans_time_nsec;*/
 381                 /*printf("seqn= %lu tos= %d start= %lu(s).%lu(ns)"\
 382                          "stop= %lu(s).%lu(ns)\n trans_time = %lums\n",\
 383                          msg.seqn, msg.tos, send_timestamp.tv_sec,\
 384                          send_timestamp.tv_nsec,recv_timestamp.tv_sec,\
 385                          recv_timestamp.tv_nsec, trans_time_msec); */
 386         }
 387 out:
 388         sem_post(&sem_thread_finished);
 389         return NULL;
 390 }
 391
 392 /**
 393  * Send a packet.
 394  *
 395  * @return -1 in case of error, 1 in case of sucessfull send and 0
 396  *         when all buffers are full.
 397  */
 398 static inline int
 399 send_packet(struct stream* stream, union msg_buff* buff)
 400 {
 401         int ret = 1;
 402         while (sendto(ac_sockfd[stream->ac], buff, stream->packet_size, 0,
 403                       (struct sockaddr*)&stream->rem_addr, sizeof(stream->rem_addr)) < 0) {
 404                 if (errno == EINTR) continue;
 405                 if (errno == EAGAIN) {
 406                         if (opt_wait_for_queue_is_full &&
 407                             !some_queue_is_full &&
 408                             /* We use mutex as atomic test and set */
 409                             (pthread_mutex_trylock(&queue_full_mutex) != EBUSY)) {
 410                                 some_queue_is_full = true;
 411                                 reset_statistics();
 412                         }
 413                         ret = 0;
 414                         break;
 415                 } else {
 416                         perror("Error while sending");
 417                         ret = -1;
 418                         break;
 419                 }
 420         }
 421         return ret;
 422 }
 423
 424 static inline void
 425 wait_for_next_send(struct stream* stream, struct timespec *last_send_time)
 426 {
 427         struct timespec time_to_wait, current_time, period, interval;
 428         unsigned period_usec = stream->period_usec;
 429
 430         /*           |~~~+~~~| jitter interval (width = 2*stream->jitter percentage from period)*/
 431         /* |-------------|     nominal period*/
 432         if (stream->jitter) {
 433                 period.tv_nsec = USEC_TO_NSEC*(period_usec*(100-stream->jitter)/100
 434                                                + rand() % (2*period_usec*stream->jitter/100));
 435         } else {
 436                 period.tv_nsec = USEC_TO_NSEC*(period_usec);
 437         }
 438         period.tv_sec = 0;
 439
 440         timespec_add(&time_to_wait, last_send_time, &period);
 441         clock_gettime(CLOCK_MONOTONIC,&current_time);
 442         timespec_sub(&interval,&time_to_wait,&current_time);
 443         nanosleep(&interval,NULL);
 444 }
 445
 446
 447 void* sender(void* arg)
 448 {
 449         union msg_buff buff;
 450         unsigned long int seqn;
 451         struct stream* stream = (struct stream*) arg;
 452         char stream_desc[100];
 453         int ret;
 454
 455         stream_to_text(stream_desc, sizeof(stream_desc), stream, 0);
 456         printf("%s\n", stream_desc);
 457
 458         if (stream->bandwidth_bps == 0)
 459                 goto out;
 460
 461         seqn = 0;
 462
 463         block_signals();
 464         set_rt_prio(90-stream->ac);
 465
 466         while (!exit_flag) {
 467
 468 /*              buff.msg.seqn = seqn++; */
 469 /*              buff.msg.tos = ac_to_tos[stream->ac]; */
 470                 buff.msg.stream = stream-streams;
 471
 472                 clock_gettime(CLOCK_MONOTONIC,&buff.msg.send_timestamp);
 473
 474                 ret = send_packet(stream, &buff);
 475                 if (ret < 0) {
 476                         goto out;
 477                 }
 478
 479                 pthread_mutex_lock(&stream->mutex);
 480                 stream->sent++;
 481                 if (ret > 0)
 482                         stream->really_sent++;
 483                 pthread_mutex_unlock(&stream->mutex);
 484
 485 #ifdef DEBUG
 486                 printf("%d", stream->ac);
 487                 fflush(stdout);
 488 #endif
 489
 490                 wait_for_next_send(stream, &buff.msg.send_timestamp);
 491         }
 492 out:
 493         sem_post(&sem_thread_finished);
 494         return NULL;
 495 }
 496
 497 static inline void
 498 calc_stream_params(struct stream *stream)
 499 {
 500         int packet_size;
 501         unsigned period_usec;
 502         int bandwidth;
 503         struct hostent* ph;
 504
 505         bandwidth = stream->bandwidth_bps;
 506
 507         /* Avoid arithmetic exception. Server thread will exit if
 508            stream->bandwidth_bps == 0. */
 509         if (bandwidth == 0) bandwidth = 1;
 510
 511         if (stream->packet_size) {
 512                 packet_size = stream->packet_size;
 513                 period_usec = SEC_TO_USEC*packet_size*8/bandwidth;
 514                 if (period_usec == 0) period_usec = 1;
 515         } else if (stream->period_usec) {
 516                 period_usec = stream->period_usec;
 517                 packet_size = (long long)bandwidth/8 * period_usec/SEC_TO_USEC;
 518         } else {
 519                 char buf[200];
 520                 stream_to_text(buf, sizeof(buf), stream, 0);
 521                 fprintf(stderr, "Neither packet size nor period was specified for a stream %s\n", buf);
 522                 exit(1);
 523         }
 524
 525         if (packet_size < sizeof(struct msg_t)) {
 526                 fprintf(stderr, "Packet size too small (min %d)\n", sizeof(struct msg_t));
 527                 exit(1);
 528         }
 529
 530         stream->packet_size = packet_size;
 531         stream->period_usec = period_usec;
 532         stream->jitter = opt_jitter;
 533
 534         memset(&stream->rem_addr,0, sizeof(stream->rem_addr));
 535
 536         stream->rem_addr.sin_family = AF_INET;
 537         ph = gethostbyname(server_addr);
 538         if (ph)
 539                 stream->rem_addr.sin_addr = *((struct in_addr *)ph->h_addr);
 540         else {
 541                 perror("Unknown server");
 542                 exit(1);
 543         }
 544         stream->rem_addr.sin_port = htons(BASE_PORT + stream->ac);
 545
 546 }
 547
 548 /**
 549  * Parse -b parameter.
 550  *
 551  * @param params String to parse
 552  *
 553  * @return NULL in case of success, pointer to a problematic character
 554  *         on error.
 555  */
 556 char* parse_bandwidths(char *params)
 557 {
 558         struct stream *sp = &streams[nr_streams];
 559
 560         while (*params && nr_streams < MAX_STREAMS) {
 561                 char *ac_ids[AC_NUM] = { [AC_VO]="VO", [AC_VI]="VI", [AC_BE]="BE", [AC_BK]="BK" };
 562                 int i;
 563                 char *next_char;
 564
 565                 if (strlen(params) < 2)
 566                         return params;
 567                 for (i=0; i<AC_NUM; i++) {
 568                         if (strncmp(params, ac_ids[i], 2) == 0) {
 569                                 sp->ac = i;
 570                                 params+=strlen(ac_ids[i]);
 571                                 break;
 572                         }
 573                 }
 574                 if (i==AC_NUM)
 575                         return params;
 576
 577                 long bw;
 578                 if (*params == ':') {
 579                         params++;
 580
 581                         bw = strtol(params, &next_char, 10);
 582                         if (next_char == params)
 583                                 return params;
 584                         params = next_char;
 585                 } else
 586                         bw = opt_def_bandwidth;
 587
 588                 sp->bandwidth_bps = bw*Kbit;
 589
 590                 long period = 0;
 591                 long packet_size = 0;
 592                 if (*params == '@') {
 593                         params++;
 594                         period = strtol(params, &next_char, 10);
 595                         if (period == 0)
 596                                 return params;
 597                         params = next_char;
 598                 }
 599                 else {
 600                         if (*params == '/') {
 601                                 params++;
 602                                 packet_size = strtol(params, &next_char, 10);
 603                                 if (packet_size == 0)
 604                                         return params;
 605                                 params = next_char;
 606                         } else {
 607                                 packet_size = opt_packet_size;
 608                                 period = opt_def_period_msec;
 609                         }
 610                 }
 611                 sp->period_usec = period*MSEC_TO_USEC;
 612                 sp->packet_size = packet_size;
 613
 614
 615
 616                 if (*params != '\0' && *params != ',')
 617                         return params;
 618                 nr_streams++;
 619                 sp++;
 620                 if (*params == ',')
 621                         params++;
 622         }
 623         return NULL;
 624 }
 625
 626 int main(int argc, char *argv[])
 627 {
 628         int ac, i, rc, seconds;
 629         pthread_attr_t attr;
 630         pthread_t thread;
 631         char opt;
 632
 633
 634         while ((opt = getopt(argc, argv, "B:b:c:g:j:o:qQ:s:T:")) != -1) {
 635                 switch (opt) {
 636                         case 'B':
 637                                 opt_def_bandwidth = atoi(optarg);
 638                                 break;
 639                         case 'b': {
 640                                 char *error;
 641                                 error = parse_bandwidths(optarg);
 642                                 if (error != NULL) {
 643                                         if (*error == '\0')
 644                                                 fprintf(stderr, "Bandwidth parse error - string to short\n");
 645                                         else
 646                                                 fprintf(stderr, "Bandwidth parse error at '%s'\n", error);
 647                                         exit(1);
 648                                 }
 649                                 break;
 650                         }
 651                         case 'c':
 652                                 opt_count_sec = atoi(optarg);
 653                                 break;
 654                         case 'g':
 655                                 opt_granularity_usec = atoi(optarg);
 656                                 if (opt_granularity_usec < MIN_GRANULARITY) {
 657                                         fprintf(stderr, "Granulatiry too small (min %d)!\n", MIN_GRANULARITY);
 658                                         exit(1);
 659                                 }
 660                                 break;
 661                         case 'j':
 662                                 opt_jitter = atoi(optarg);
 663                                 break;
 664                         case 'o':
 665                                 opt_output = optarg;
 666                                 break;
 667                         case 'Q':
 668                                 opt_send_buf_size = atoi(optarg);
 669                                 break;
 670                         case 'q':
 671                                 opt_wait_for_queue_is_full = true;
 672                                 break;
 673                         case 's':
 674                                 opt_packet_size = atoi(optarg);
 675                                 break;
 676                         case 'T':
 677                                 opt_def_period_msec = atoi(optarg);
 678                                 break;
 679                         default:
 680                                 fprintf(stderr, "Usage: %s [ options ] server_addr\n\n", argv[0]);
 681                                 fprintf(stderr, "Options:\n");
 682                                 fprintf(stderr, "    -B  default bandwidth for -b option [kbit]\n");
 683                                 fprintf(stderr, "    -b  bandwidth of streams (VO|VI|BE|BK)[:<kbit>][@<msec> or /<bytes>][,...]\n");
 684                                 fprintf(stderr, "    -c  count (number of seconds to run)\n");
 685                                 fprintf(stderr, "    -g  histogram granularity [usec]\n");
 686                                 fprintf(stderr, "    -j  send jitter (0-100) [%%]\n");
 687                                 fprintf(stderr, "    -o  output filename (.dat will be appended)\n");
 688                                 fprintf(stderr, "    -q  gather statistics only after some queue becomes full\n");
 689                                 fprintf(stderr, "    -Q  <bytes> set size for socket send buffers\n");
 690                                 fprintf(stderr, "    -s  size of data payload in packets [bytes] (default: %d)\n", opt_packet_size);
 691                                 fprintf(stderr, "    -T  default period for -b option [msec]\n");
 692                                 exit(1);
 693                 }
 694         }
 695         if (opt_packet_size && opt_def_period_msec) {
 696                 fprintf(stderr, "Error: Nonzero -T and -s can't be used together!.\n");
 697                 exit(1);
 698         }
 699
 700         if (optind < argc) {
 701                 server_addr = argv[optind];
 702         } else {
 703                 fprintf(stderr, "Expected server address argument\n");
 704                 exit(1);
 705         }
 706
 707         if (nr_streams == 0)
 708                 parse_bandwidths("BE");
 709
 710         pthread_attr_init(&attr);
 711
 712         snprintf(logfname, sizeof(logfname), "%s.dat", opt_output);
 713
 714         if ((logfd = fopen(logfname,"w+")) == NULL) {
 715                 fprintf(stderr,"Can not open %s\n", logfname);
 716                 exit(1);
 717         }
 718         if (signal(SIGTERM, stopper) == SIG_ERR) {
 719                 perror("Error in signal registration");
 720                 exit(1);
 721         }
 722
 723         if (signal(SIGINT, stopper) == SIG_ERR) {
 724                 perror("Signal handler registration error");
 725                 exit(1);
 726         }
 727
 728         struct sigaction sa;
 729         sa.sa_handler = empty_handler;
 730         sa.sa_flags = 0;        /* don't restart syscalls */
 731
 732         if (sigaction(SIGUSR1, &sa, NULL) < 0) {
 733                 perror("sigaction error");
 734                 exit(1);
 735         }
 736
 737         sem_init(&sem_thread_finished, 0, 0);
 738
 739         reset_statistics();
 740
 741         /* create four receivers each per AC */
 742         for (ac = AC_NUM - 1; ac >= 0; ac--) {
 743                 ac_sockfd[ac] = create_ac_socket(ac);
 744                 if (ac_sockfd[ac] < 0) {
 745                         return 1;
 746                 }
 747                 rc = pthread_create(&receivers[ac].thread, &attr, receiver, (void*) ac);
 748                 if (rc) {
 749                         fprintf(stderr, "Error while creating receiver %d\n",rc);
 750                         return 1;
 751                 }
 752         }
 753
 754         /* create sendpoints */
 755         for (i = 0; i < nr_streams; i++) {
 756                 struct stream *s = &streams[i];
 757                 pthread_mutex_init(&s->mutex, NULL);
 758                 calc_stream_params(s);
 759                 rc = pthread_create(&thread, &attr, sender, (void*) s);
 760                 if (rc) {
 761                         fprintf(stderr, "Error while creating sender %d\n",rc);
 762                         return 1;
 763                 }
 764         }
 765
 766         seconds = 0;
 767         while (!exit_flag) {
 768                 sleep(1);
 769                 seconds++;
 770                 fprintf(stderr, "\r%3ds", seconds);
 771                 for (ac = 0; ac < AC_NUM; ac++) {
 772                         int delta = receivers[ac].received - receivers[ac].last_received;
 773                         receivers[ac].last_received = receivers[ac].received;
 774                         fprintf(stderr, " %s %5d %4d/s", ac_to_text[ac], receivers[ac].received, delta);
 775                 }
 776                 fflush(stderr);
 777                 if (seconds == opt_count_sec)
 778                         stopper();
 779         }
 780
 781         fprintf(stderr, "\nWaiting for threads to finish\n");
 782         /* Wait for all threads to finish */
 783         for (i=0; i < nr_streams + AC_NUM; i++) {
 784                 sem_wait(&sem_thread_finished);
 785         }
 786         struct timespec end_timestamp, measure_length;
 787         clock_gettime(CLOCK_MONOTONIC,&end_timestamp);
 788         timespec_sub(&measure_length, &end_timestamp, &reset_timestamp);
 789
 790         save_results(argc, argv, timespec2usec(&measure_length));
 791
 792         return 0;
 793 }