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 static inline
 259 void timespec_add (struct timespec *sum, const struct timespec *left,
 260               const struct timespec *right)
 261 {
 262         sum->tv_sec = left->tv_sec + right->tv_sec;
 263         sum->tv_nsec = left->tv_nsec + right->tv_nsec;
 264
 265         if (sum->tv_nsec >= 1000000000){
 266                 ++sum->tv_sec;
 267                 sum->tv_nsec -= 1000000000;
 268         }
 269 }
 270
 271 static inline
 272 void timespec_sub (struct timespec *diff, const struct timespec *left,
 273               const struct timespec *right)
 274 {
 275         diff->tv_sec = left->tv_sec - right->tv_sec;
 276         diff->tv_nsec = left->tv_nsec - right->tv_nsec;
 277
 278         if (diff->tv_nsec < 0){
 279                   --diff->tv_sec;
 280                   diff->tv_nsec += 1000000000;
 281         }
 282 }
 283
 284 static inline long long timespec_sub_usec(const struct timespec *left,
 285                                           const struct timespec *right)
 286 {
 287         struct timespec result;
 288         timespec_sub(&result, left, right);
 289         return (long long)result.tv_sec * SEC_TO_USEC +
 290                 result.tv_nsec / USEC_TO_NSEC;
 291 }
 292
 293 static inline long long timespec2usec(const struct timespec *ts)
 294 {
 295         return ts->tv_sec * SEC_TO_USEC + ts->tv_nsec / USEC_TO_NSEC;
 296 }
 297
 298
 299 int create_ac_socket(unsigned int ac)
 300 {
 301         int sockfd;
 302         unsigned int yes=1, tos;
 303
 304
 305         if ((sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
 306         {
 307                 perror("Unable to open socket");
 308                 return -1;
 309         }
 310         if (fcntl(sockfd, F_SETFL, O_NONBLOCK) != 0) {
 311                 perror("set non-blocking socket");
 312                 return -1;
 313         }
 314         if (setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(int)) == -1) {
 315                 perror("Unable to set socket");
 316                 return -1;
 317         }
 318
 319         if (opt_send_buf_size >= 0) {
 320                 if (setsockopt(sockfd,SOL_SOCKET,SO_SNDBUF,&opt_send_buf_size,sizeof(opt_send_buf_size)) == -1) {
 321                         perror("Unable to set socket buffer size");
 322                         return -1;
 323                 }
 324         }
 325
 326
 327         //tos = ((AC_NUM - ac) *2 - 1)*32;
 328         tos = ac_to_tos[ac];
 329         if (setsockopt(sockfd, SOL_IP, IP_TOS, &tos, sizeof(tos))) {
 330                 perror("Unable to set TOS");
 331                 close(sockfd);
 332                 return -1;
 333         }
 334
 335         return sockfd;
 336 }
 337
 338 void empty_handler()
 339 {
 340 }
 341
 342 void reset_statistics()
 343 {
 344         int i;
 345         for (i = 0; i < nr_streams; i++) {
 346                 pthread_mutex_lock(&streams[i].mutex);
 347                 streams[i].sent = 0;
 348                 streams[i].really_sent = 0;
 349                 streams[i].received = 0;
 350                 pthread_mutex_unlock(&streams[i].mutex);
 351         }
 352         pthread_mutex_lock(&delay_stats_mutex);
 353         clock_gettime(CLOCK_REALTIME, &reset_timestamp);
 354         memset(delay_stats, 0, sizeof(delay_stats));
 355         pthread_mutex_unlock(&delay_stats_mutex);
 356 }
 357
 358 void* receiver(void* queue)
 359 {
 360         struct msg_t    msg;
 361         struct  sockaddr_in rem_addr;
 362         int     mlen, ret;
 363         unsigned int ac, rem_addr_length;
 364         long long int trans_time_usec, client_to_server_usec, server_to_client_usec;
 365         long long int min_trans_time;
 366         struct timespec send_timestamp, server_timestamp, recv_timestamp;
 367         fd_set fdset;
 368
 369         min_trans_time = ~0;
 370
 371         block_signals();
 372         set_rt_prio(99);
 373
 374         ac = (int)queue;
 375         rem_addr_length = sizeof(rem_addr);
 376         FD_ZERO(&fdset);
 377         while (!exit_flag) {
 378                 FD_SET(ac_sockfd[ac], &fdset);
 379                 ret = select(ac_sockfd[ac]+1, &fdset, NULL, NULL, NULL);
 380                 if (ret < 0) {
 381                         if (errno == EINTR) continue;
 382                         perror("receiver select");
 383                         goto out;
 384                 }
 385                 mlen = recvfrom(ac_sockfd[ac], &msg, sizeof(msg), 0,
 386                                 (struct sockaddr*)&rem_addr, &rem_addr_length);
 387                 if (mlen < 0) {
 388                         perror("Chyba pri prijimani pozadavku");
 389                         goto out;
 390                 }
 391                 clock_gettime(CLOCK_REALTIME,&recv_timestamp);
 392                 send_timestamp = msg.send_timestamp;
 393                 server_timestamp = msg.sendback_timestamp;
 394
 395                 /* Check whether this message was sent after reset_statistics() */
 396
 397                 if ((ret = timespec_sub_usec(&send_timestamp, &reset_timestamp)) < 0) {
 398                         continue; /* If so, don't count it */
 399                 }
 400
 401                 trans_time_usec = timespec_sub_usec(&recv_timestamp ,&send_timestamp) / 2;
 402                 client_to_server_usec = timespec_sub_usec(&server_timestamp, &send_timestamp);
 403                 server_to_client_usec = timespec_sub_usec(&recv_timestamp, &server_timestamp);
 404
 405                 pthread_mutex_lock(&delay_stats_mutex);
 406                 if (trans_time_usec < MAX_DELAY_US) {
 407                         delay_stats[ac][trans_time_usec/opt_granularity_usec].csc++;
 408                 }
 409                 if (client_to_server_usec < MAX_DELAY_US && client_to_server_usec >= 0) {
 410                         delay_stats[ac][client_to_server_usec/opt_granularity_usec].cs++;
 411                 }
 412                 if (server_to_client_usec < MAX_DELAY_US && server_to_client_usec >= 0) {
 413                         delay_stats[ac][server_to_client_usec/opt_granularity_usec].sc++;
 414                 }
 415                 pthread_mutex_unlock(&delay_stats_mutex);
 416
 417                 receivers[ac].received++;
 418
 419                 pthread_mutex_lock(&streams[msg.stream].mutex);
 420                 streams[msg.stream].received++;
 421                 pthread_mutex_unlock(&streams[msg.stream].mutex);
 422
 423                 /*if (trans_time_nsec < min_trans_time)
 424                         min_trans_time = trans_time_nsec;*/
 425                 /*printf("seqn= %lu tos= %d start= %lu(s).%lu(ns)"\
 426                          "stop= %lu(s).%lu(ns)\n trans_time = %lums\n",\
 427                          msg.seqn, msg.tos, send_timestamp.tv_sec,\
 428                          send_timestamp.tv_nsec,recv_timestamp.tv_sec,\
 429                          recv_timestamp.tv_nsec, trans_time_msec); */
 430         }
 431 out:
 432         sem_post(&sem_thread_finished);
 433         return NULL;
 434 }
 435
 436 /**
 437  * Send a packet.
 438  *
 439  * @return -1 in case of error, 1 in case of sucessfull send and 0
 440  *         when all buffers are full.
 441  */
 442 #ifndef WITH_FWP
 443 static inline int
 444 send_packet_native(struct stream* stream, union msg_buff* buff)
 445 {
 446         int ret = 1;
 447         while (sendto(ac_sockfd[stream->ac], buff, stream->packet_size, 0,
 448                       (struct sockaddr*)&stream->rem_addr, sizeof(stream->rem_addr)) < 0) {
 449                 if (errno == EINTR) continue;
 450                 if (errno == EAGAIN) {
 451                         if (opt_wait_for_queue_is_full &&
 452                             !some_queue_is_full &&
 453                             /* We use mutex as atomic test and set */
 454                             (pthread_mutex_trylock(&queue_full_mutex) != EBUSY)) {
 455                                 some_queue_is_full = true;
 456                                 reset_statistics();
 457                         }
 458                         ret = 0;
 459                         break;
 460                 } else {
 461                         perror("Error while sending");
 462                         ret = -1;
 463                         break;
 464                 }
 465         }
 466         return ret;
 467 }
 468 #else
 469 static inline int
 470 send_packet_fwp(struct stream* stream, union msg_buff* buff)
 471 {
 472         int ret = 1;
 473 /*      while (sendto(ac_sockfd[stream->ac], buff, stream->packet_size, 0, */
 474 /*                    (struct sockaddr*)&stream->rem_addr, sizeof(stream->rem_addr)) < 0) { */
 475 /*              if (errno == EINTR) continue; */
 476 /*              if (errno == EAGAIN) { */
 477 /*                      if (opt_wait_for_queue_is_full &&  */
 478 /*                          !some_queue_is_full &&  */
 479 /*                          /\* We use mutex as atomic test and set *\/ */
 480 /*                          (pthread_mutex_trylock(&queue_full_mutex) != EBUSY)) { */
 481 /*                              some_queue_is_full = true; */
 482 /*                              reset_statistics(); */
 483 /*                      } */
 484 /*                      ret = 0; */
 485 /*                      break; */
 486 /*              } else { */
 487 /*                      perror("Error while sending"); */
 488 /*                      ret = -1; */
 489 /*                      break; */
 490 /*              } */
 491 /*      } */
 492         return ret;
 493 }
 494 #endif
 495
 496 static inline void
 497 wait_for_next_send(struct stream* stream, struct timespec *last_send_time)
 498 {
 499         struct timespec time_to_wait, current_time, period, interval;
 500         unsigned period_usec = stream->period_usec;
 501
 502         /*           |~~~+~~~| jitter interval (width = 2*stream->jitter percentage from period)*/
 503         /* |-------------|     nominal period*/
 504         if (stream->jitter) {
 505                 period.tv_nsec = USEC_TO_NSEC*(period_usec*(100-stream->jitter)/100
 506                                                + rand() % (2*period_usec*stream->jitter/100));
 507         } else {
 508                 period.tv_nsec = USEC_TO_NSEC*(period_usec);
 509         }
 510         period.tv_sec = 0;
 511
 512         timespec_add(&time_to_wait, last_send_time, &period);
 513         clock_gettime(CLOCK_REALTIME,&current_time);
 514         timespec_sub(&interval,&time_to_wait,&current_time);
 515         nanosleep(&interval,NULL);
 516 }
 517
 518
 519 void* sender(void* arg)
 520 {
 521         union msg_buff buff;
 522         unsigned long int seqn;
 523         struct stream* stream = (struct stream*) arg;
 524         char stream_desc[100];
 525         int ret;
 526
 527         stream_to_text(stream_desc, sizeof(stream_desc), stream, 0);
 528         printf("%s\n", stream_desc);
 529
 530         if (stream->bandwidth_bps == 0)
 531                 goto out;
 532
 533         seqn = 0;
 534
 535         block_signals();
 536         set_rt_prio(90-stream->ac);
 537
 538         while (!exit_flag) {
 539
 540 /*              buff.msg.seqn = seqn++; */
 541 /*              buff.msg.tos = ac_to_tos[stream->ac]; */
 542                 buff.msg.stream = stream-streams;
 543
 544                 clock_gettime(CLOCK_REALTIME,&buff.msg.send_timestamp);
 545
 546                 ret = send_packet(stream, &buff);
 547                 if (ret < 0) {
 548                         goto out;
 549                 }
 550
 551                 pthread_mutex_lock(&stream->mutex);
 552                 stream->sent++;
 553                 if (ret > 0)
 554                         stream->really_sent++;
 555                 pthread_mutex_unlock(&stream->mutex);
 556
 557 #ifdef DEBUG
 558                 printf("%d", stream->ac);
 559                 fflush(stdout);
 560 #endif
 561
 562                 wait_for_next_send(stream, &buff.msg.send_timestamp);
 563         }
 564 out:
 565         sem_post(&sem_thread_finished);
 566         return NULL;
 567 }
 568
 569 #ifdef WITH_FWP
 570 static int negotiate_contract_for_stream_fwp(struct stream *stream)
 571 {
 572         struct fwp_contract contract;
 573         int vres_id;
 574         int ret;
 575
 576         contract.budget = stream->packet_size;
 577         contract.period_usec = stream->period_usec;
 578         ret = fwp_contract_negotiate(&contract, &vres_id);
 579         if (ret == 0) {
 580                 if (contract.status == FWP_CNT_NEGOTIATED) {
 581                         stream->vres_id = vres_id;
 582                 } else {
 583                         stream->vres_id = -1;
 584                 }
 585         }
 586         return ret;
 587 }
 588 #endif
 589
 590 #ifdef WITH_FWP
 591 static void create_stream_endpoint_fwp(struct stream *stream)
 592 {
 593         /* TODO: How to create an enpoint? */
 594 }
 595 #else
 596 static void create_stream_endpoint_native(struct stream *stream)
 597 {
 598         struct hostent* ph;
 599
 600         memset(&stream->rem_addr,0, sizeof(stream->rem_addr));
 601
 602         stream->rem_addr.sin_family = AF_INET;
 603         ph = gethostbyname(server_addr);
 604         if (ph)
 605                 stream->rem_addr.sin_addr = *((struct in_addr *)ph->h_addr);
 606         else {
 607                 perror("Unknown server");
 608                 exit(1);
 609         }
 610         stream->rem_addr.sin_port = htons(BASE_PORT + stream->ac);
 611 }
 612 #endif
 613
 614 static inline void
 615 calc_stream_params(struct stream *stream)
 616 {
 617         int packet_size;
 618         unsigned period_usec;
 619         int bandwidth;
 620         int ret;
 621
 622         /* If some parameters are not set explicitely, use default values. */
 623         if (stream->bandwidth_bps < 0) stream->bandwidth_bps = opt_def_bandwidth * Kbit;
 624         if (stream->packet_size < 0) stream->packet_size = opt_packet_size;
 625         if (stream->period_usec < 0) stream->period_usec = opt_def_period_msec * MSEC_TO_USEC;
 626
 627         bandwidth = stream->bandwidth_bps;
 628
 629         /* Avoid arithmetic exception. Server thread will exit if
 630            stream->bandwidth_bps == 0. */
 631         if (bandwidth == 0) bandwidth = 1;
 632
 633         if (stream->packet_size) {
 634                 packet_size = stream->packet_size;
 635                 period_usec = SEC_TO_USEC*packet_size*8/bandwidth;
 636                 if (period_usec == 0) period_usec = 1;
 637         } else if (stream->period_usec) {
 638                 period_usec = stream->period_usec;
 639                 packet_size = (long long)bandwidth/8 * period_usec/SEC_TO_USEC;
 640         } else {
 641                 char buf[200];
 642                 stream_to_text(buf, sizeof(buf), stream, 0);
 643                 fprintf(stderr, "Neither packet size nor period was specified for a stream %s\n", buf);
 644                 exit(1);
 645         }
 646
 647         if (packet_size < sizeof(struct msg_t)) {
 648                 fprintf(stderr, "Packet size too small (min %d)\n", sizeof(struct msg_t));
 649                 exit(1);
 650         }
 651
 652         stream->packet_size = packet_size;
 653         stream->period_usec = period_usec;
 654         stream->jitter = opt_jitter;
 655
 656         ret = negotiate_contract_for_stream(stream);
 657         if (ret == 0) {
 658                 create_stream_endpoint(stream);
 659         } else {
 660                 char buf[200];
 661                 stream_to_text(buf, sizeof(buf), stream, 0);
 662                 fprintf(stderr, "Contract hasn't been accepted: %s\n", buf);
 663                 stream->bandwidth_bps = 0;
 664         }
 665 }
 666
 667 /**
 668  * Parse -b parameter.
 669  *
 670  * @param params String to parse
 671  *
 672  * @return NULL in case of success, pointer to a problematic character
 673  *         on error.
 674  */
 675 char* parse_bandwidths(char *params)
 676 {
 677         struct stream *sp = &streams[nr_streams];
 678
 679         while (*params && nr_streams < MAX_STREAMS) {
 680                 char *ac_ids[AC_NUM] = { [AC_VO]="VO", [AC_VI]="VI", [AC_BE]="BE", [AC_BK]="BK" };
 681                 int i;
 682                 char *next_char;
 683
 684                 if (strlen(params) < 2)
 685                         return params;
 686                 for (i=0; i<AC_NUM; i++) {
 687                         if (strncmp(params, ac_ids[i], 2) == 0) {
 688                                 sp->ac = i;
 689                                 params+=strlen(ac_ids[i]);
 690                                 break;
 691                         }
 692                 }
 693                 if (i==AC_NUM)
 694                         return params;
 695
 696                 long bw;
 697                 if (*params == ':') {
 698                         params++;
 699
 700                         bw = strtol(params, &next_char, 10);
 701                         if (next_char == params)
 702                                 return params;
 703                         params = next_char;
 704                 } else
 705                         bw = -1;
 706
 707                 sp->bandwidth_bps = bw*Kbit;
 708
 709                 long period = 0;
 710                 long packet_size = 0;
 711                 if (*params == '@') {
 712                         params++;
 713                         period = strtol(params, &next_char, 10);
 714                         if (period == 0)
 715                                 return params;
 716                         params = next_char;
 717                 }
 718                 else {
 719                         if (*params == '/') {
 720                                 params++;
 721                                 packet_size = strtol(params, &next_char, 10);
 722                                 if (packet_size == 0)
 723                                         return params;
 724                                 params = next_char;
 725                         } else {
 726                                 packet_size = -1;
 727                                 period = -1;
 728                         }
 729                 }
 730                 sp->period_usec = period*MSEC_TO_USEC;
 731                 sp->packet_size = packet_size;
 732
 733
 734
 735                 if (*params != '\0' && *params != ',')
 736                         return params;
 737                 nr_streams++;
 738                 sp++;
 739                 if (*params == ',')
 740                         params++;
 741         }
 742         return NULL;
 743 }
 744
 745 int main(int argc, char *argv[])
 746 {
 747         int ac, i, rc, seconds;
 748         pthread_attr_t attr;
 749         pthread_t thread;
 750         char opt;
 751
 752
 753         while ((opt = getopt(argc, argv, "B:b:c:g:j:o:qQ:s:T:")) != -1) {
 754                 switch (opt) {
 755                         case 'B':
 756                                 opt_def_bandwidth = atoi(optarg);
 757                                 break;
 758                         case 'b': {
 759                                 char *error;
 760                                 error = parse_bandwidths(optarg);
 761                                 if (error != NULL) {
 762                                         if (*error == '\0')
 763                                                 fprintf(stderr, "Bandwidth parse error - string to short\n");
 764                                         else
 765                                                 fprintf(stderr, "Bandwidth parse error at '%s'\n", error);
 766                                         exit(1);
 767                                 }
 768                                 break;
 769                         }
 770                         case 'c':
 771                                 opt_count_sec = atoi(optarg);
 772                                 break;
 773                         case 'g':
 774                                 opt_granularity_usec = atoi(optarg);
 775                                 if (opt_granularity_usec < MIN_GRANULARITY) {
 776                                         fprintf(stderr, "Granulatiry too small (min %d)!\n", MIN_GRANULARITY);
 777                                         exit(1);
 778                                 }
 779                                 break;
 780                         case 'j':
 781                                 opt_jitter = atoi(optarg);
 782                                 break;
 783                         case 'o':
 784                                 opt_output = optarg;
 785                                 break;
 786                         case 'Q':
 787                                 opt_send_buf_size = atoi(optarg);
 788                                 break;
 789                         case 'q':
 790                                 opt_wait_for_queue_is_full = true;
 791                                 break;
 792                         case 's':
 793                                 opt_packet_size = atoi(optarg);
 794                                 break;
 795                         case 'T':
 796                                 opt_def_period_msec = atoi(optarg);
 797                                 break;
 798                         default:
 799                                 fprintf(stderr, "Usage: %s [ options ] server_addr\n\n", argv[0]);
 800                                 fprintf(stderr, "Options:\n");
 801                                 fprintf(stderr, "    -B  default bandwidth for -b option [kbit]\n");
 802                                 fprintf(stderr, "    -b  bandwidth of streams (VO|VI|BE|BK)[:<kbit>][@<msec> or /<bytes>][,...]\n");
 803                                 fprintf(stderr, "    -c  count (number of seconds to run)\n");
 804                                 fprintf(stderr, "    -g  histogram granularity [usec]\n");
 805                                 fprintf(stderr, "    -j  send jitter (0-100) [%%]\n");
 806                                 fprintf(stderr, "    -o  output filename (.dat will be appended)\n");
 807                                 fprintf(stderr, "    -q  gather statistics only after some queue becomes full\n");
 808                                 fprintf(stderr, "    -Q  <bytes> set size for socket send buffers\n");
 809                                 fprintf(stderr, "    -s  size of data payload in packets [bytes] (default: %d)\n", opt_packet_size);
 810                                 fprintf(stderr, "    -T  default period for -b option [msec]\n");
 811                                 exit(1);
 812                 }
 813         }
 814         if (opt_packet_size && opt_def_period_msec) {
 815                 fprintf(stderr, "Error: Nonzero -T and -s can't be used together!.\n");
 816                 exit(1);
 817         }
 818
 819         if (optind < argc) {
 820                 server_addr = argv[optind];
 821         } else {
 822                 fprintf(stderr, "Expected server address argument\n");
 823                 exit(1);
 824         }
 825
 826         if (nr_streams == 0)
 827                 parse_bandwidths("BE");
 828
 829         pthread_attr_init(&attr);
 830
 831         snprintf(logfname, sizeof(logfname), "%s.dat", opt_output);
 832
 833         if ((logfd = fopen(logfname,"w+")) == NULL) {
 834                 fprintf(stderr,"Can not open %s\n", logfname);
 835                 exit(1);
 836         }
 837         if (signal(SIGTERM, stopper) == SIG_ERR) {
 838                 perror("Error in signal registration");
 839                 exit(1);
 840         }
 841
 842         if (signal(SIGINT, stopper) == SIG_ERR) {
 843                 perror("Signal handler registration error");
 844                 exit(1);
 845         }
 846
 847         struct sigaction sa;
 848         sa.sa_handler = empty_handler;
 849         sa.sa_flags = 0;        /* don't restart syscalls */
 850
 851         if (sigaction(SIGUSR1, &sa, NULL) < 0) {
 852                 perror("sigaction error");
 853                 exit(1);
 854         }
 855
 856         sem_init(&sem_thread_finished, 0, 0);
 857
 858         reset_statistics();
 859
 860         /* create four receivers each per AC */
 861         for (ac = AC_NUM - 1; ac >= 0; ac--) {
 862                 ac_sockfd[ac] = create_ac_socket(ac);
 863                 if (ac_sockfd[ac] < 0) {
 864                         return 1;
 865                 }
 866                 rc = pthread_create(&receivers[ac].thread, &attr, receiver, (void*) ac);
 867                 if (rc) {
 868                         fprintf(stderr, "Error while creating receiver %d\n",rc);
 869                         return 1;
 870                 }
 871         }
 872
 873         /* create sendpoints */
 874         for (i = 0; i < nr_streams; i++) {
 875                 struct stream *s = &streams[i];
 876                 pthread_mutex_init(&s->mutex, NULL);
 877                 calc_stream_params(s);
 878                 rc = pthread_create(&thread, &attr, sender, (void*) s);
 879                 if (rc) {
 880                         fprintf(stderr, "Error while creating sender %d\n",rc);
 881                         return 1;
 882                 }
 883         }
 884
 885         seconds = 0;
 886         while (!exit_flag) {
 887                 sleep(1);
 888                 seconds++;
 889                 fprintf(stderr, "\r%3ds", seconds);
 890                 for (ac = 0; ac < AC_NUM; ac++) {
 891                         int delta = receivers[ac].received - receivers[ac].last_received;
 892                         receivers[ac].last_received = receivers[ac].received;
 893                         fprintf(stderr, " %s %5d %4d/s", ac_to_text[ac], receivers[ac].received, delta);
 894                 }
 895                 fflush(stderr);
 896                 if (seconds == opt_count_sec)
 897                         stopper();
 898         }
 899
 900         fprintf(stderr, "\nWaiting for threads to finish\n");
 901         /* Wait for all threads to finish */
 902         for (i=0; i < nr_streams + AC_NUM; i++) {
 903                 sem_wait(&sem_thread_finished);
 904         }
 905         struct timespec end_timestamp, measure_length;
 906         clock_gettime(CLOCK_REALTIME,&end_timestamp);
 907         timespec_sub(&measure_length, &end_timestamp, &reset_timestamp);
 908
 909         save_results(argc, argv, timespec2usec(&measure_length));
 910
 911         return 0;
 912 }