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