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 #ifdef WITH_FWP
  22 #include <fwp_proto.h>
  23 #endif
  24
  25 #define MAX_STREAMS  10
  26 #define MIN_GRANULARITY 100
  27
  28 unsigned opt_packet_size = 800;
  29 int opt_send_buf_size = -1;
  30 unsigned opt_period_usec = 10*MSEC_TO_USEC;
  31 unsigned opt_jitter = 0;
  32 char    *opt_output = "delay_stats";
  33 unsigned opt_count_sec = 0;
  34 unsigned opt_def_bandwidth = 200;
  35 unsigned opt_def_period_msec = 0;
  36 int opt_granularity_usec = MIN_GRANULARITY;
  37 bool opt_wait_for_queue_is_full; /* Don't gather any statistics until any queue is full */
  38
  39 bool some_queue_is_full = false;
  40 struct timespec reset_timestamp;
  41
  42 /* Locked when some queue is full to prevent multiple resets of
  43    statstics. */
  44 pthread_mutex_t queue_full_mutex = PTHREAD_MUTEX_INITIALIZER;
  45
  46 int ac_sockfd[AC_NUM];
  47
  48 struct receiver {
  49         pthread_t thread;
  50         unsigned received, last_received;
  51 } receivers[AC_NUM];
  52
  53 FILE* logfd;
  54 char* server_addr;
  55 char logfname[100];
  56
  57 /* maximal traffic delay in ms - 10 s*/
  58 #define MAX_DELAY_US 10000000
  59
  60 struct delay_stat {
  61         unsigned csc;           /* Client-server-client delay divided by 2 */
  62         unsigned cs;            /* Client-server delay */
  63         unsigned sc;            /* Server-client delay */
  64 };
  65
  66 struct delay_stat delay_stats[AC_NUM][MAX_DELAY_US/MIN_GRANULARITY];
  67 pthread_mutex_t delay_stats_mutex = PTHREAD_MUTEX_INITIALIZER;
  68
  69 /*struct ac_stats[AC_NUM] {
  70    unsigned long int min_trans_time;
  71    unsigned long int sum_trans_time;
  72    struct timespec   recv_timestamp;
  73    struct timespec   send_timestamp;
  74 };*/
  75
  76 struct stream {
  77         /* Input parameters */
  78         enum ac ac;             /*  */
  79         int bandwidth_bps;      /* bits per second */
  80         int jitter;             /* percent */
  81         /* Mulualy exclusive input parameters */
  82         int packet_size;
  83         long period_usec;       /* all time units are in microseconds */
  84
  85         /* Internal fields */
  86 #ifndef WITH_FWP
  87         struct sockaddr_in rem_addr;
  88 #else
  89         int vres_id;
  90 #endif
  91
  92         /* Statistics */
  93         pthread_mutex_t mutex;
  94         unsigned long long sent, really_sent, received;
  95 };
  96
  97 /*
  98 struct send_endpoint sepoint[] = {
  99         { .ac = AC_VO, .period_usec=200*MSEC_TO_USEC, .bandwidth_bps = 34*Kbit },
 100         { .ac = AC_VI, .period_usec=25*MSEC_TO_USEC, .bandwidth_bps =  480*Kbit },
 101         { .ac = AC_BE, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
 102         { .ac = AC_BK, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
 103 //      { .ac = AC_VI, .period_usec=17*MSEC_TO_USEC, .bandwidth_bps =  675*Kbit },
 104 };
 105 */
 106
 107 struct stream streams[MAX_STREAMS];
 108
 109 unsigned int nr_streams = 0;
 110
 111 sem_t sem_thread_finished;
 112
 113 bool exit_flag = false;
 114
 115 #ifdef WITH_FWP
 116 #define negotiate_contract_for_stream(s) negotiate_contract_for_stream_fwp(s)
 117 #define create_stream_endpoint(s) create_stream_endpoint_fwp(s)
 118 #define send_packet(s, b) send_packet_fwp(s, b)
 119 #else
 120 #define negotiate_contract_for_stream(s) 0
 121 #define create_stream_endpoint(s) create_stream_endpoint_native(s)
 122 #define send_packet(s, b) send_packet_native(s, b)
 123 #endif
 124
 125 void stopper()
 126 {
 127         int i;
 128         exit_flag = true;
 129
 130         /* Interrupt all receivers */
 131         for (i=0; i < AC_NUM; i++) {
 132                 pthread_kill(receivers[i].thread, SIGUSR1);
 133         }
 134 }
 135
 136 void stream_to_text(char *stream_desc, size_t n, struct stream *stream, long long useconds)
 137 {
 138         char buf[3][12];
 139         char real[100];
 140
 141         if (useconds) {
 142                 snprintf(real, sizeof(real), "; real: %s sent %lld (%lld/s), received %lld (%lld/s)",
 143                          bandwidth_to_text(buf[0], (long long)stream->really_sent*stream->packet_size*8*SEC_TO_USEC/useconds),
 144                          stream->sent, stream->sent*SEC_TO_USEC/useconds,
 145                          stream->received, stream->received*SEC_TO_USEC/useconds);
 146         } else {
 147                 real[0]=0;
 148         }
 149
 150         snprintf(stream_desc, n, "%d: %s %s (%d bytes per %s +-%s, %d packets/s)%s",
 151                  stream-streams, ac_to_text[stream->ac], bandwidth_to_text(buf[0], stream->bandwidth_bps),
 152                  stream->packet_size, usec_to_text(buf[1], stream->period_usec),
 153                  usec_to_text(buf[2], stream->jitter*stream->period_usec/100),
 154                  (int)(SEC_TO_USEC/stream->period_usec), real);
 155 }
 156
 157 void save_results(int argc, char *argv[], int useconds)
 158 {
 159         int ac, i, maxi;
 160         const int mini = 3000/opt_granularity_usec;
 161         bool allzeros;
 162         unsigned send_count[AC_NUM];
 163
 164         fprintf(stderr, "Writing data to %s... ", logfname);
 165         fflush(stderr);
 166
 167         fprintf(logfd, "# Invoked as: ");
 168         for (i=0; i<argc; i++) fprintf(logfd, "%s ", argv[i]);
 169         fprintf(logfd, "\n");
 170
 171         if (useconds/SEC_TO_USEC != opt_count_sec) {
 172                 char buf[20];
 173                 usec_to_text(buf, useconds);
 174                 fprintf(logfd, "# Data gathered for %s.\n", buf);
 175         }
 176
 177         for (i = 0; i < nr_streams; i++) {
 178                 char stream_desc[200];
 179                 stream_to_text(stream_desc, sizeof(stream_desc), &streams[i], useconds);
 180                 fprintf(logfd, "# Stream %s\n", stream_desc);
 181         }
 182
 183         /* Find maximal delay */
 184         allzeros = true;
 185         for (maxi = MAX_DELAY_US/opt_granularity_usec - 1; maxi >= 0; maxi--) {
 186                 for (ac = 0; ac < AC_NUM; ac++) {
 187                         if ((delay_stats[ac][maxi].csc != 0) ||
 188                             (delay_stats[ac][maxi].cs != 0) ||
 189                             (delay_stats[ac][maxi].sc != 0))
 190                                 allzeros = false;
 191                 }
 192                 if (!allzeros) break;
 193         }
 194         maxi++;
 195         if (maxi < mini) maxi = mini;
 196
 197         /* Calculate total number of sent packets per AC */
 198         memset(send_count, 0, sizeof(send_count));
 199         for (i = 0; i < nr_streams; i++) {
 200                 ac = streams[i].ac;
 201                 send_count[ac] += streams[i].sent;
 202         }
 203
 204 #if 0
 205         /* Write pdf */
 206         for ( i = 0 ; i < maxi; i++) {
 207                 fprintf(logfd,"\n%f", i*opt_granularity_usec/1000.0);
 208                 for (ac = 0; ac < AC_NUM; ac++) {
 209                         if (sum[ac])
 210                                 val = (double)delay_stats[ac][i]*100.0 / sum[ac];
 211                         else val = -1; /* Don't display this ac */
 212                         fprintf(logfd," %lf", val);
 213                 }
 214         }
 215
 216         fprintf(logfd,"\n\n");
 217 #endif
 218
 219         fprintf(logfd,"## Format: msec csc%% cs%% sc%%\n");
 220
 221         /* Write PDF */
 222         for (ac = 0; ac < AC_NUM; ac++) {
 223                 struct delay_stat integral = {0,0,0}, last = {-1,-1,-1};
 224
 225                 fprintf(logfd,"%f %f %f %f\n", 0.0, 0.0, 0.0, 0.0);
 226
 227                 if (send_count[ac] != 0) {
 228                         i=0;
 229                         while ((delay_stats[ac][i].csc == 0) &&
 230                                (delay_stats[ac][i].cs == 0) &&
 231                                (delay_stats[ac][i].sc == 0)) i++;
 232
 233                         for (i++; i < maxi+1; i++) {
 234                                 if (memcmp(&last, &integral, sizeof(last))) {
 235                                         fprintf(logfd,"%f %f %f %f\n", i*opt_granularity_usec/1000.0,
 236                                                 (double)integral.csc*100.0 / send_count[ac],
 237                                                 (double)integral.cs *100.0 / send_count[ac],
 238                                                 (double)integral.sc *100.0 / send_count[ac]
 239                                                 );
 240                                         last = integral;
 241                                 }
 242                                 if (i>0) {
 243                                         integral.csc += delay_stats[ac][i-1].csc;
 244                                         integral.sc  += delay_stats[ac][i-1].sc;
 245                                         integral.cs  += delay_stats[ac][i-1].cs;
 246                                 }
 247                         }
 248                 }
 249                 fprintf(logfd,"\n\n");
 250         }
 251
 252         fprintf(stderr, "finished.\n");
 253         fclose(logfd);
 254
 255         exit(0);
 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         if (opt_send_buf_size >= 0) {
 279                 if (setsockopt(sockfd,SOL_SOCKET,SO_SNDBUF,&opt_send_buf_size,sizeof(opt_send_buf_size)) == -1) {
 280                         perror("Unable to set socket buffer size");
 281                         return -1;
 282                 }
 283         }
 284
 285
 286         //tos = ((AC_NUM - ac) *2 - 1)*32;
 287         tos = ac_to_tos[ac];
 288         if (setsockopt(sockfd, SOL_IP, IP_TOS, &tos, sizeof(tos))) {
 289                 perror("Unable to set TOS");
 290                 close(sockfd);
 291                 return -1;
 292         }
 293
 294         return sockfd;
 295 }
 296
 297 void empty_handler()
 298 {
 299 }
 300
 301 void reset_statistics()
 302 {
 303         int i;
 304         for (i = 0; i < nr_streams; i++) {
 305                 pthread_mutex_lock(&streams[i].mutex);
 306                 streams[i].sent = 0;
 307                 streams[i].really_sent = 0;
 308                 streams[i].received = 0;
 309                 pthread_mutex_unlock(&streams[i].mutex);
 310         }
 311         pthread_mutex_lock(&delay_stats_mutex);
 312         clock_gettime(CLOCK_REALTIME, &reset_timestamp);
 313         memset(delay_stats, 0, sizeof(delay_stats));
 314         pthread_mutex_unlock(&delay_stats_mutex);
 315 }
 316
 317 void* receiver(void* queue)
 318 {
 319         struct msg_t    msg;
 320         struct  sockaddr_in rem_addr;
 321         int     mlen, ret;
 322         unsigned int ac, rem_addr_length;
 323         long long int trans_time_usec, client_to_server_usec, server_to_client_usec;
 324         long long int min_trans_time;
 325         struct timespec send_timestamp, server_timestamp, recv_timestamp;
 326         fd_set fdset;
 327
 328         min_trans_time = ~0;
 329
 330         block_signals();
 331         set_rt_prio(99);
 332
 333         ac = (int)queue;
 334         rem_addr_length = sizeof(rem_addr);
 335         FD_ZERO(&fdset);
 336         while (!exit_flag) {
 337                 FD_SET(ac_sockfd[ac], &fdset);
 338                 ret = select(ac_sockfd[ac]+1, &fdset, NULL, NULL, NULL);
 339                 if (ret < 0) {
 340                         if (errno == EINTR) continue;
 341                         perror("receiver select");
 342                         goto out;
 343                 }
 344                 mlen = recvfrom(ac_sockfd[ac], &msg, sizeof(msg), 0,
 345                                 (struct sockaddr*)&rem_addr, &rem_addr_length);
 346                 if (mlen < 0) {
 347                         perror("Chyba pri prijimani pozadavku");
 348                         goto out;
 349                 }
 350                 clock_gettime(CLOCK_REALTIME,&recv_timestamp);
 351                 send_timestamp = msg.send_timestamp;
 352                 server_timestamp = msg.sendback_timestamp;
 353
 354                 /* Check whether this message was sent after reset_statistics() */
 355
 356                 if ((ret = timespec_sub_usec(&send_timestamp, &reset_timestamp)) < 0) {
 357                         continue; /* If so, don't count it */
 358                 }
 359
 360                 trans_time_usec = timespec_sub_usec(&recv_timestamp ,&send_timestamp) / 2;
 361                 client_to_server_usec = timespec_sub_usec(&server_timestamp, &send_timestamp);
 362                 server_to_client_usec = timespec_sub_usec(&recv_timestamp, &server_timestamp);
 363
 364                 pthread_mutex_lock(&delay_stats_mutex);
 365                 if (trans_time_usec < MAX_DELAY_US) {
 366                         delay_stats[ac][trans_time_usec/opt_granularity_usec].csc++;
 367                 }
 368                 if (client_to_server_usec < MAX_DELAY_US && client_to_server_usec >= 0) {
 369                         delay_stats[ac][client_to_server_usec/opt_granularity_usec].cs++;
 370                 }
 371                 if (server_to_client_usec < MAX_DELAY_US && server_to_client_usec >= 0) {
 372                         delay_stats[ac][server_to_client_usec/opt_granularity_usec].sc++;
 373                 }
 374                 pthread_mutex_unlock(&delay_stats_mutex);
 375
 376                 receivers[ac].received++;
 377
 378                 pthread_mutex_lock(&streams[msg.stream].mutex);
 379                 streams[msg.stream].received++;
 380                 pthread_mutex_unlock(&streams[msg.stream].mutex);
 381
 382                 /*if (trans_time_nsec < min_trans_time)
 383                         min_trans_time = trans_time_nsec;*/
 384                 /*printf("seqn= %lu tos= %d start= %lu(s).%lu(ns)"\
 385                          "stop= %lu(s).%lu(ns)\n trans_time = %lums\n",\
 386                          msg.seqn, msg.tos, send_timestamp.tv_sec,\
 387                          send_timestamp.tv_nsec,recv_timestamp.tv_sec,\
 388                          recv_timestamp.tv_nsec, trans_time_msec); */
 389         }
 390 out:
 391         sem_post(&sem_thread_finished);
 392         return NULL;
 393 }
 394
 395 /**
 396  * Send a packet.
 397  *
 398  * @return -1 in case of error, 1 in case of sucessfull send and 0
 399  *         when all buffers are full.
 400  */
 401 #ifndef WITH_FWP
 402 static inline int
 403 send_packet_native(struct stream* stream, union msg_buff* buff)
 404 {
 405         int ret = 1;
 406         while (sendto(ac_sockfd[stream->ac], buff, stream->packet_size, 0,
 407                       (struct sockaddr*)&stream->rem_addr, sizeof(stream->rem_addr)) < 0) {
 408                 if (errno == EINTR) continue;
 409                 if (errno == EAGAIN) {
 410                         if (opt_wait_for_queue_is_full &&
 411                             !some_queue_is_full &&
 412                             /* We use mutex as atomic test and set */
 413                             (pthread_mutex_trylock(&queue_full_mutex) != EBUSY)) {
 414                                 some_queue_is_full = true;
 415                                 reset_statistics();
 416                         }
 417                         ret = 0;
 418                         break;
 419                 } else {
 420                         perror("Error while sending");
 421                         ret = -1;
 422                         break;
 423                 }
 424         }
 425         return ret;
 426 }
 427 #else
 428 static inline int
 429 send_packet_fwp(struct stream* stream, union msg_buff* buff)
 430 {
 431         int ret = 1;
 432 /*      while (sendto(ac_sockfd[stream->ac], buff, stream->packet_size, 0, */
 433 /*                    (struct sockaddr*)&stream->rem_addr, sizeof(stream->rem_addr)) < 0) { */
 434 /*              if (errno == EINTR) continue; */
 435 /*              if (errno == EAGAIN) { */
 436 /*                      if (opt_wait_for_queue_is_full &&  */
 437 /*                          !some_queue_is_full &&  */
 438 /*                          /\* We use mutex as atomic test and set *\/ */
 439 /*                          (pthread_mutex_trylock(&queue_full_mutex) != EBUSY)) { */
 440 /*                              some_queue_is_full = true; */
 441 /*                              reset_statistics(); */
 442 /*                      } */
 443 /*                      ret = 0; */
 444 /*                      break; */
 445 /*              } else { */
 446 /*                      perror("Error while sending"); */
 447 /*                      ret = -1; */
 448 /*                      break; */
 449 /*              } */
 450 /*      } */
 451         return ret;
 452 }
 453 #endif
 454
 455 static inline void
 456 wait_for_next_send(struct stream* stream, struct timespec *last_send_time)
 457 {
 458         struct timespec time_to_wait, current_time, period, interval;
 459         unsigned period_usec = stream->period_usec;
 460
 461         /*           |~~~+~~~| jitter interval (width = 2*stream->jitter percentage from period)*/
 462         /* |-------------|     nominal period*/
 463         if (stream->jitter) {
 464                 period.tv_nsec = USEC_TO_NSEC*(period_usec*(100-stream->jitter)/100
 465                                                + rand() % (2*period_usec*stream->jitter/100));
 466         } else {
 467                 period.tv_nsec = USEC_TO_NSEC*(period_usec);
 468         }
 469         period.tv_sec = 0;
 470
 471         timespec_add(&time_to_wait, last_send_time, &period);
 472         clock_gettime(CLOCK_REALTIME,&current_time);
 473         timespec_sub(&interval,&time_to_wait,&current_time);
 474         nanosleep(&interval,NULL);
 475 }
 476
 477
 478 void* sender(void* arg)
 479 {
 480         union msg_buff buff;
 481         unsigned long int seqn;
 482         struct stream* stream = (struct stream*) arg;
 483         char stream_desc[100];
 484         int ret;
 485
 486         stream_to_text(stream_desc, sizeof(stream_desc), stream, 0);
 487         printf("%s\n", stream_desc);
 488
 489         if (stream->bandwidth_bps == 0)
 490                 goto out;
 491
 492         seqn = 0;
 493
 494         block_signals();
 495         set_rt_prio(90-stream->ac);
 496
 497         while (!exit_flag) {
 498
 499 /*              buff.msg.seqn = seqn++; */
 500 /*              buff.msg.tos = ac_to_tos[stream->ac]; */
 501                 buff.msg.stream = stream-streams;
 502
 503                 clock_gettime(CLOCK_REALTIME,&buff.msg.send_timestamp);
 504
 505                 ret = send_packet(stream, &buff);
 506                 if (ret < 0) {
 507                         goto out;
 508                 }
 509
 510                 pthread_mutex_lock(&stream->mutex);
 511                 stream->sent++;
 512                 if (ret > 0)
 513                         stream->really_sent++;
 514                 pthread_mutex_unlock(&stream->mutex);
 515
 516 #ifdef DEBUG
 517                 printf("%d", stream->ac);
 518                 fflush(stdout);
 519 #endif
 520
 521                 wait_for_next_send(stream, &buff.msg.send_timestamp);
 522         }
 523 out:
 524         sem_post(&sem_thread_finished);
 525         return NULL;
 526 }
 527
 528 #ifdef WITH_FWP
 529 static int negotiate_contract_for_stream_fwp(struct stream *stream)
 530 {
 531         struct fwp_contract contract;
 532         int vres_id;
 533         int ret;
 534
 535         contract.budget = stream->packet_size;
 536         contract.period_usec = stream->period_usec;
 537         ret = fwp_contract_negotiate(&contract, &vres_id);
 538         if (ret == 0) {
 539                 if (contract.status == FWP_CNT_NEGOTIATED) {
 540                         stream->vres_id = vres_id;
 541                 } else {
 542                         stream->vres_id = -1;
 543                 }
 544         }
 545         return ret;
 546 }
 547 #endif
 548
 549 #ifdef WITH_FWP
 550 static void create_stream_endpoint_fwp(struct stream *stream)
 551 {
 552         /* TODO: How to create an enpoint? */
 553 }
 554 #else
 555 static void create_stream_endpoint_native(struct stream *stream)
 556 {
 557         struct hostent* ph;
 558
 559         memset(&stream->rem_addr,0, sizeof(stream->rem_addr));
 560
 561         stream->rem_addr.sin_family = AF_INET;
 562         ph = gethostbyname(server_addr);
 563         if (ph)
 564                 stream->rem_addr.sin_addr = *((struct in_addr *)ph->h_addr);
 565         else {
 566                 perror("Unknown server");
 567                 exit(1);
 568         }
 569         stream->rem_addr.sin_port = htons(BASE_PORT + stream->ac);
 570 }
 571 #endif
 572
 573 static inline void
 574 calc_stream_params(struct stream *stream)
 575 {
 576         int packet_size;
 577         unsigned period_usec;
 578         int bandwidth;
 579         int ret;
 580
 581         /* If some parameters are not set explicitely, use default values. */
 582         if (stream->bandwidth_bps < 0) stream->bandwidth_bps = opt_def_bandwidth * Kbit;
 583         if (stream->packet_size < 0) stream->packet_size = opt_packet_size;
 584         if (stream->period_usec < 0) stream->period_usec = opt_def_period_msec * MSEC_TO_USEC;
 585
 586         bandwidth = stream->bandwidth_bps;
 587
 588         /* Avoid arithmetic exception. Server thread will exit if
 589            stream->bandwidth_bps == 0. */
 590         if (bandwidth == 0) bandwidth = 1;
 591
 592         if (stream->packet_size) {
 593                 packet_size = stream->packet_size;
 594                 period_usec = SEC_TO_USEC*packet_size*8/bandwidth;
 595                 if (period_usec == 0) period_usec = 1;
 596         } else if (stream->period_usec) {
 597                 period_usec = stream->period_usec;
 598                 packet_size = (long long)bandwidth/8 * period_usec/SEC_TO_USEC;
 599         } else {
 600                 char buf[200];
 601                 stream_to_text(buf, sizeof(buf), stream, 0);
 602                 fprintf(stderr, "Neither packet size nor period was specified for a stream %s\n", buf);
 603                 exit(1);
 604         }
 605
 606         if (packet_size < sizeof(struct msg_t)) {
 607                 fprintf(stderr, "Packet size too small (min %d)\n", sizeof(struct msg_t));
 608                 exit(1);
 609         }
 610
 611         stream->packet_size = packet_size;
 612         stream->period_usec = period_usec;
 613         stream->jitter = opt_jitter;
 614
 615         ret = negotiate_contract_for_stream(stream);
 616         if (ret == 0) {
 617                 create_stream_endpoint(stream);
 618         } else {
 619                 char buf[200];
 620                 stream_to_text(buf, sizeof(buf), stream, 0);
 621                 fprintf(stderr, "Contract hasn't been accepted: %s\n", buf);
 622                 stream->bandwidth_bps = 0;
 623         }
 624 }
 625
 626 /**
 627  * Parse -b parameter.
 628  *
 629  * @param params String to parse
 630  *
 631  * @return NULL in case of success, pointer to a problematic character
 632  *         on error.
 633  */
 634 char* parse_bandwidths(char *params)
 635 {
 636         struct stream *sp = &streams[nr_streams];
 637
 638         while (*params && nr_streams < MAX_STREAMS) {
 639                 char *ac_ids[AC_NUM] = { [AC_VO]="VO", [AC_VI]="VI", [AC_BE]="BE", [AC_BK]="BK" };
 640                 int i;
 641                 char *next_char;
 642
 643                 if (strlen(params) < 2)
 644                         return params;
 645                 for (i=0; i<AC_NUM; i++) {
 646                         if (strncmp(params, ac_ids[i], 2) == 0) {
 647                                 sp->ac = i;
 648                                 params+=strlen(ac_ids[i]);
 649                                 break;
 650                         }
 651                 }
 652                 if (i==AC_NUM)
 653                         return params;
 654
 655                 long bw;
 656                 if (*params == ':') {
 657                         params++;
 658
 659                         bw = strtol(params, &next_char, 10);
 660                         if (next_char == params)
 661                                 return params;
 662                         params = next_char;
 663                 } else
 664                         bw = -1;
 665
 666                 sp->bandwidth_bps = bw*Kbit;
 667
 668                 long period = 0;
 669                 long packet_size = 0;
 670                 if (*params == '@') {
 671                         params++;
 672                         period = strtol(params, &next_char, 10);
 673                         if (period == 0)
 674                                 return params;
 675                         params = next_char;
 676                 }
 677                 else {
 678                         if (*params == '/') {
 679                                 params++;
 680                                 packet_size = strtol(params, &next_char, 10);
 681                                 if (packet_size == 0)
 682                                         return params;
 683                                 params = next_char;
 684                         } else {
 685                                 packet_size = -1;
 686                                 period = -1;
 687                         }
 688                 }
 689                 sp->period_usec = period*MSEC_TO_USEC;
 690                 sp->packet_size = packet_size;
 691
 692
 693
 694                 if (*params != '\0' && *params != ',')
 695                         return params;
 696                 nr_streams++;
 697                 sp++;
 698                 if (*params == ',')
 699                         params++;
 700         }
 701         return NULL;
 702 }
 703
 704 int main(int argc, char *argv[])
 705 {
 706         int ac, i, rc, seconds;
 707         pthread_attr_t attr;
 708         pthread_t thread;
 709         char opt;
 710
 711
 712         while ((opt = getopt(argc, argv, "B:b:c:g:j:o:qQ:s:T:")) != -1) {
 713                 switch (opt) {
 714                         case 'B':
 715                                 opt_def_bandwidth = atoi(optarg);
 716                                 break;
 717                         case 'b': {
 718                                 char *error;
 719                                 error = parse_bandwidths(optarg);
 720                                 if (error != NULL) {
 721                                         if (*error == '\0')
 722                                                 fprintf(stderr, "Bandwidth parse error - string to short\n");
 723                                         else
 724                                                 fprintf(stderr, "Bandwidth parse error at '%s'\n", error);
 725                                         exit(1);
 726                                 }
 727                                 break;
 728                         }
 729                         case 'c':
 730                                 opt_count_sec = atoi(optarg);
 731                                 break;
 732                         case 'g':
 733                                 opt_granularity_usec = atoi(optarg);
 734                                 if (opt_granularity_usec < MIN_GRANULARITY) {
 735                                         fprintf(stderr, "Granulatiry too small (min %d)!\n", MIN_GRANULARITY);
 736                                         exit(1);
 737                                 }
 738                                 break;
 739                         case 'j':
 740                                 opt_jitter = atoi(optarg);
 741                                 break;
 742                         case 'o':
 743                                 opt_output = optarg;
 744                                 break;
 745                         case 'Q':
 746                                 opt_send_buf_size = atoi(optarg);
 747                                 break;
 748                         case 'q':
 749                                 opt_wait_for_queue_is_full = true;
 750                                 break;
 751                         case 's':
 752                                 opt_packet_size = atoi(optarg);
 753                                 break;
 754                         case 'T':
 755                                 opt_def_period_msec = atoi(optarg);
 756                                 break;
 757                         default:
 758                                 fprintf(stderr, "Usage: %s [ options ] server_addr\n\n", argv[0]);
 759                                 fprintf(stderr, "Options:\n");
 760                                 fprintf(stderr, "    -B  default bandwidth for -b option [kbit]\n");
 761                                 fprintf(stderr, "    -b  bandwidth of streams (VO|VI|BE|BK)[:<kbit>][@<msec> or /<bytes>][,...]\n");
 762                                 fprintf(stderr, "    -c  count (number of seconds to run)\n");
 763                                 fprintf(stderr, "    -g  histogram granularity [usec]\n");
 764                                 fprintf(stderr, "    -j  send jitter (0-100) [%%]\n");
 765                                 fprintf(stderr, "    -o  output filename (.dat will be appended)\n");
 766                                 fprintf(stderr, "    -q  gather statistics only after some queue becomes full\n");
 767                                 fprintf(stderr, "    -Q  <bytes> set size for socket send buffers\n");
 768                                 fprintf(stderr, "    -s  size of data payload in packets [bytes] (default: %d)\n", opt_packet_size);
 769                                 fprintf(stderr, "    -T  default period for -b option [msec]\n");
 770                                 exit(1);
 771                 }
 772         }
 773         if (opt_packet_size && opt_def_period_msec) {
 774                 fprintf(stderr, "Error: Nonzero -T and -s can't be used together!.\n");
 775                 exit(1);
 776         }
 777
 778         if (optind < argc) {
 779                 server_addr = argv[optind];
 780         } else {
 781                 fprintf(stderr, "Expected server address argument\n");
 782                 exit(1);
 783         }
 784
 785         if (nr_streams == 0)
 786                 parse_bandwidths("BE");
 787
 788         pthread_attr_init(&attr);
 789
 790         snprintf(logfname, sizeof(logfname), "%s.dat", opt_output);
 791
 792         if ((logfd = fopen(logfname,"w+")) == NULL) {
 793                 fprintf(stderr,"Can not open %s\n", logfname);
 794                 exit(1);
 795         }
 796         if (signal(SIGTERM, stopper) == SIG_ERR) {
 797                 perror("Error in signal registration");
 798                 exit(1);
 799         }
 800
 801         if (signal(SIGINT, stopper) == SIG_ERR) {
 802                 perror("Signal handler registration error");
 803                 exit(1);
 804         }
 805
 806         struct sigaction sa;
 807         sa.sa_handler = empty_handler;
 808         sa.sa_flags = 0;        /* don't restart syscalls */
 809
 810         if (sigaction(SIGUSR1, &sa, NULL) < 0) {
 811                 perror("sigaction error");
 812                 exit(1);
 813         }
 814
 815         sem_init(&sem_thread_finished, 0, 0);
 816
 817         reset_statistics();
 818
 819         /* create four receivers each per AC */
 820         for (ac = AC_NUM - 1; ac >= 0; ac--) {
 821                 ac_sockfd[ac] = create_ac_socket(ac);
 822                 if (ac_sockfd[ac] < 0) {
 823                         return 1;
 824                 }
 825                 rc = pthread_create(&receivers[ac].thread, &attr, receiver, (void*) ac);
 826                 if (rc) {
 827                         fprintf(stderr, "Error while creating receiver %d\n",rc);
 828                         return 1;
 829                 }
 830         }
 831
 832         /* create sendpoints */
 833         for (i = 0; i < nr_streams; i++) {
 834                 struct stream *s = &streams[i];
 835                 pthread_mutex_init(&s->mutex, NULL);
 836                 calc_stream_params(s);
 837                 rc = pthread_create(&thread, &attr, sender, (void*) s);
 838                 if (rc) {
 839                         fprintf(stderr, "Error while creating sender %d\n",rc);
 840                         return 1;
 841                 }
 842         }
 843
 844         seconds = 0;
 845         while (!exit_flag) {
 846                 sleep(1);
 847                 seconds++;
 848                 fprintf(stderr, "\r%3ds", seconds);
 849                 for (ac = 0; ac < AC_NUM; ac++) {
 850                         int delta = receivers[ac].received - receivers[ac].last_received;
 851                         receivers[ac].last_received = receivers[ac].received;
 852                         fprintf(stderr, " %s %5d %4d/s", ac_to_text[ac], receivers[ac].received, delta);
 853                 }
 854                 fflush(stderr);
 855                 if (seconds == opt_count_sec)
 856                         stopper();
 857         }
 858
 859         fprintf(stderr, "\nWaiting for threads to finish\n");
 860         /* Wait for all threads to finish */
 861         for (i=0; i < nr_streams + AC_NUM; i++) {
 862                 sem_wait(&sem_thread_finished);
 863         }
 864         struct timespec end_timestamp, measure_length;
 865         clock_gettime(CLOCK_REALTIME,&end_timestamp);
 866         timespec_sub(&measure_length, &end_timestamp, &reset_timestamp);
 867
 868         save_results(argc, argv, timespec2usec(&measure_length));
 869
 870         return 0;
 871 }