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 #include <sys/ioctl.h>
  21 #include <net/if.h>
  22
  23 #ifdef WITH_FWP
  24 #include <fwp_proto.h>
  25 #endif
  26
  27 #define MAX_STREAMS  10
  28 #define MIN_GRANULARITY 100
  29
  30 unsigned opt_packet_size = 800;
  31 int opt_send_buf_size = -1;
  32 unsigned opt_period_usec = 10*MSEC_TO_USEC;
  33 char    *opt_interface;
  34 unsigned opt_jitter = 0;
  35 char    *opt_output = "delay_stats";
  36 unsigned opt_count_sec = 0;
  37 unsigned opt_def_bandwidth = 200;
  38 unsigned opt_def_period_msec = 0;
  39 int opt_granularity_usec = MIN_GRANULARITY;
  40 bool opt_wait_for_queue_is_full; /* Don't gather any statistics until any queue is full */
  41
  42 bool some_queue_is_full = false;
  43 struct timespec reset_timestamp;
  44
  45 /* Locked when some queue is full to prevent multiple resets of
  46    statstics. */
  47 pthread_mutex_t queue_full_mutex = PTHREAD_MUTEX_INITIALIZER;
  48
  49 int ac_sockfd[AC_NUM];
  50
  51 struct receiver {
  52         pthread_t thread;
  53         unsigned received, last_received;
  54 } receivers[AC_NUM];
  55
  56 FILE* logfd;
  57 char* server_addr;
  58 char logfname[100];
  59
  60 /* maximal traffic delay in ms - 10 s*/
  61 #define MAX_DELAY_US 10000000
  62
  63 struct delay_stat {
  64         unsigned csc;           /* Client-server-client delay divided by 2 */
  65         unsigned cs;            /* Client-server delay */
  66         unsigned sc;            /* Server-client delay */
  67 };
  68
  69 struct delay_stat delay_stats[AC_NUM][MAX_DELAY_US/MIN_GRANULARITY];
  70 pthread_mutex_t delay_stats_mutex = PTHREAD_MUTEX_INITIALIZER;
  71
  72 /*struct ac_stats[AC_NUM] {
  73    unsigned long int min_trans_time;
  74    unsigned long int sum_trans_time;
  75    struct timespec   recv_timestamp;
  76    struct timespec   send_timestamp;
  77 };*/
  78
  79 struct stream {
  80         /* Input parameters */
  81         enum ac ac;             /*  */
  82         int bandwidth_bps;      /* bits per second */
  83         int jitter;             /* percent */
  84         /* Mulualy exclusive input parameters */
  85         int packet_size;
  86         long period_usec;       /* all time units are in microseconds */
  87
  88         /* Internal fields */
  89 #ifndef WITH_FWP
  90         struct sockaddr_in rem_addr;
  91 #else
  92         int vres_id;
  93 #endif
  94
  95         /* Statistics */
  96         pthread_mutex_t mutex;
  97         unsigned long long sent, really_sent, received;
  98 };
  99
 100 static struct cmsg_ipi {
 101         struct cmsghdr cm;
 102         struct in_pktinfo ipi;
 103 } cmsg = { {sizeof(struct cmsg_ipi), SOL_IP, IP_PKTINFO},
 104            {0, }};
 105 int cmsg_len = 0;
 106
 107 /*
 108 struct send_endpoint sepoint[] = {
 109         { .ac = AC_VO, .period_usec=200*MSEC_TO_USEC, .bandwidth_bps = 34*Kbit },
 110         { .ac = AC_VI, .period_usec=25*MSEC_TO_USEC, .bandwidth_bps =  480*Kbit },
 111         { .ac = AC_BE, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
 112         { .ac = AC_BK, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
 113 //      { .ac = AC_VI, .period_usec=17*MSEC_TO_USEC, .bandwidth_bps =  675*Kbit },
 114 };
 115 */
 116
 117 struct stream streams[MAX_STREAMS];
 118
 119 unsigned int nr_streams = 0;
 120
 121 sem_t sem_thread_finished;
 122
 123 bool exit_flag = false;
 124
 125 #ifdef WITH_FWP
 126 #define negotiate_contract_for_stream(s) negotiate_contract_for_stream_fwp(s)
 127 #define create_stream_endpoint(s) create_stream_endpoint_fwp(s)
 128 #define send_packet(s, b) send_packet_fwp(s, b)
 129 #else
 130 #define negotiate_contract_for_stream(s) 0
 131 #define create_stream_endpoint(s) create_stream_endpoint_native(s)
 132 #define send_packet(s, b) send_packet_native(s, b)
 133 #endif
 134
 135 void stopper()
 136 {
 137         int i;
 138         exit_flag = true;
 139
 140         /* Interrupt all receivers */
 141         for (i=0; i < AC_NUM; i++) {
 142                 pthread_kill(receivers[i].thread, SIGUSR1);
 143         }
 144 }
 145
 146 void stream_to_text(char *stream_desc, size_t n, struct stream *stream, long long useconds)
 147 {
 148         char buf[3][12];
 149         char real[100];
 150
 151         if (useconds) {
 152                 snprintf(real, sizeof(real), "; real: %s sent %lld (%lld/s), received %lld (%lld/s)",
 153                          bandwidth_to_text(buf[0], (long long)stream->really_sent*stream->packet_size*8*SEC_TO_USEC/useconds),
 154                          stream->sent, stream->sent*SEC_TO_USEC/useconds,
 155                          stream->received, stream->received*SEC_TO_USEC/useconds);
 156         } else {
 157                 real[0]=0;
 158         }
 159
 160         snprintf(stream_desc, n, "%d: %s %s (%d bytes per %s +-%s, %d packets/s)%s",
 161                  stream-streams, ac_to_text[stream->ac], bandwidth_to_text(buf[0], stream->bandwidth_bps),
 162                  stream->packet_size, usec_to_text(buf[1], stream->period_usec),
 163                  usec_to_text(buf[2], stream->jitter*stream->period_usec/100),
 164                  (int)(SEC_TO_USEC/stream->period_usec), real);
 165 }
 166
 167 void save_results(int argc, char *argv[], int useconds)
 168 {
 169         int ac, i, maxi;
 170         const int mini = 3000/opt_granularity_usec;
 171         bool allzeros;
 172         unsigned send_count[AC_NUM];
 173
 174         fprintf(stderr, "Writing data to %s... ", logfname);
 175         fflush(stderr);
 176
 177         fprintf(logfd, "# Invoked as: ");
 178         for (i=0; i<argc; i++) fprintf(logfd, "%s ", argv[i]);
 179         fprintf(logfd, "\n");
 180
 181         if (useconds/SEC_TO_USEC != opt_count_sec) {
 182                 char buf[20];
 183                 usec_to_text(buf, useconds);
 184                 fprintf(logfd, "# Data gathered for %s.\n", buf);
 185         }
 186
 187         for (i = 0; i < nr_streams; i++) {
 188                 char stream_desc[200];
 189                 stream_to_text(stream_desc, sizeof(stream_desc), &streams[i], useconds);
 190                 fprintf(logfd, "# Stream %s\n", stream_desc);
 191         }
 192
 193         /* Find maximal delay */
 194         allzeros = true;
 195         for (maxi = MAX_DELAY_US/opt_granularity_usec - 1; maxi >= 0; maxi--) {
 196                 for (ac = 0; ac < AC_NUM; ac++) {
 197                         if ((delay_stats[ac][maxi].csc != 0) ||
 198                             (delay_stats[ac][maxi].cs != 0) ||
 199                             (delay_stats[ac][maxi].sc != 0))
 200                                 allzeros = false;
 201                 }
 202                 if (!allzeros) break;
 203         }
 204         maxi++;
 205         if (maxi < mini) maxi = mini;
 206
 207         /* Calculate total number of sent packets per AC */
 208         memset(send_count, 0, sizeof(send_count));
 209         for (i = 0; i < nr_streams; i++) {
 210                 ac = streams[i].ac;
 211                 send_count[ac] += streams[i].sent;
 212         }
 213
 214 #if 0
 215         /* Write pdf */
 216         for ( i = 0 ; i < maxi; i++) {
 217                 fprintf(logfd,"\n%f", i*opt_granularity_usec/1000.0);
 218                 for (ac = 0; ac < AC_NUM; ac++) {
 219                         if (sum[ac])
 220                                 val = (double)delay_stats[ac][i]*100.0 / sum[ac];
 221                         else val = -1; /* Don't display this ac */
 222                         fprintf(logfd," %lf", val);
 223                 }
 224         }
 225
 226         fprintf(logfd,"\n\n");
 227 #endif
 228
 229         fprintf(logfd,"## Format: msec csc%% cs%% sc%%\n");
 230
 231         /* Write PDF */
 232         for (ac = 0; ac < AC_NUM; ac++) {
 233                 struct delay_stat integral = {0,0,0}, last = {-1,-1,-1};
 234
 235                 fprintf(logfd,"%f %f %f %f\n", 0.0, 0.0, 0.0, 0.0);
 236
 237                 if (send_count[ac] != 0) {
 238                         i=0;
 239                         while ((delay_stats[ac][i].csc == 0) &&
 240                                (delay_stats[ac][i].cs == 0) &&
 241                                (delay_stats[ac][i].sc == 0)) i++;
 242
 243                         for (i++; i < maxi+1; i++) {
 244                                 if (memcmp(&last, &integral, sizeof(last))) {
 245                                         char buf[3][20];
 246                                         snprintf(buf[0], sizeof(buf[0]), "%f", (double)integral.csc*100.0 / send_count[ac]);
 247                                         snprintf(buf[1], sizeof(buf[1]), "%f", (double)integral.cs *100.0 / send_count[ac]);
 248                                         snprintf(buf[2], sizeof(buf[2]), "%f", (double)integral.sc *100.0 / send_count[ac]);
 249
 250                                         fprintf(logfd,"%f %s %s %s\n", i*opt_granularity_usec/1000.0,
 251                                                 integral.csc != last.csc ? buf[0] : "-",
 252                                                 integral.cs  != last.cs  ? buf[1] : "-",
 253                                                 integral.sc  != last.sc  ? buf[2] : "-"
 254                                                 );
 255                                         last = integral;
 256                                 }
 257                                 if (i>0) {
 258                                         integral.csc += delay_stats[ac][i-1].csc;
 259                                         integral.sc  += delay_stats[ac][i-1].sc;
 260                                         integral.cs  += delay_stats[ac][i-1].cs;
 261                                 }
 262                         }
 263                 }
 264                 fprintf(logfd,"\n\n");
 265         }
 266
 267         fprintf(stderr, "finished.\n");
 268         fclose(logfd);
 269
 270         exit(0);
 271 }
 272
 273 int create_ac_socket(unsigned int ac)
 274 {
 275         int sockfd;
 276         unsigned int yes=1, tos;
 277
 278
 279         if ((sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
 280         {
 281                 perror("Unable to open socket");
 282                 return -1;
 283         }
 284         if (fcntl(sockfd, F_SETFL, O_NONBLOCK) != 0) {
 285                 perror("set non-blocking socket");
 286                 return -1;
 287         }
 288         if (setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(int)) == -1) {
 289                 perror("Unable to set socket");
 290                 return -1;
 291         }
 292
 293         if (opt_send_buf_size >= 0) {
 294                 if (setsockopt(sockfd,SOL_SOCKET,SO_SNDBUF,&opt_send_buf_size,sizeof(opt_send_buf_size)) == -1) {
 295                         perror("Unable to set socket buffer size");
 296                         return -1;
 297                 }
 298         }
 299
 300
 301         //tos = ((AC_NUM - ac) *2 - 1)*32;
 302         tos = ac_to_tos[ac];
 303         if (setsockopt(sockfd, SOL_IP, IP_TOS, &tos, sizeof(tos))) {
 304                 perror("Unable to set TOS");
 305                 close(sockfd);
 306                 return -1;
 307         }
 308
 309         return sockfd;
 310 }
 311
 312 void empty_handler()
 313 {
 314 }
 315
 316 void reset_statistics()
 317 {
 318         int i;
 319         for (i = 0; i < nr_streams; i++) {
 320                 pthread_mutex_lock(&streams[i].mutex);
 321                 streams[i].sent = 0;
 322                 streams[i].really_sent = 0;
 323                 streams[i].received = 0;
 324                 pthread_mutex_unlock(&streams[i].mutex);
 325         }
 326         pthread_mutex_lock(&delay_stats_mutex);
 327         clock_gettime(CLOCK_REALTIME, &reset_timestamp);
 328         memset(delay_stats, 0, sizeof(delay_stats));
 329         pthread_mutex_unlock(&delay_stats_mutex);
 330 }
 331
 332 void* receiver(void* queue)
 333 {
 334         struct msg_t    msg;
 335         struct  sockaddr_in rem_addr;
 336         int     mlen, ret;
 337         unsigned int ac, rem_addr_length;
 338         long long int trans_time_usec, client_to_server_usec, server_to_client_usec;
 339         long long int min_trans_time;
 340         struct timespec send_timestamp, server_timestamp, recv_timestamp;
 341         fd_set fdset;
 342
 343         min_trans_time = ~0;
 344
 345         block_signals();
 346         set_rt_prio(99);
 347
 348         ac = (int)queue;
 349         rem_addr_length = sizeof(rem_addr);
 350         FD_ZERO(&fdset);
 351         while (!exit_flag) {
 352                 FD_SET(ac_sockfd[ac], &fdset);
 353                 ret = select(ac_sockfd[ac]+1, &fdset, NULL, NULL, NULL);
 354                 if (ret < 0) {
 355                         if (errno == EINTR) continue;
 356                         perror("receiver select");
 357                         goto out;
 358                 }
 359                 mlen = recvfrom(ac_sockfd[ac], &msg, sizeof(msg), 0,
 360                                 (struct sockaddr*)&rem_addr, &rem_addr_length);
 361                 if (mlen < 0) {
 362                         perror("Chyba pri prijimani pozadavku");
 363                         goto out;
 364                 }
 365                 clock_gettime(CLOCK_REALTIME,&recv_timestamp);
 366                 send_timestamp = msg.send_timestamp;
 367                 server_timestamp = msg.sendback_timestamp;
 368
 369                 /* Check whether this message was sent after reset_statistics() */
 370
 371                 if ((ret = timespec_sub_usec(&send_timestamp, &reset_timestamp)) < 0) {
 372                         continue; /* If so, don't count it */
 373                 }
 374
 375                 trans_time_usec = timespec_sub_usec(&recv_timestamp ,&send_timestamp) / 2;
 376                 client_to_server_usec = timespec_sub_usec(&server_timestamp, &send_timestamp);
 377                 server_to_client_usec = timespec_sub_usec(&recv_timestamp, &server_timestamp);
 378
 379                 pthread_mutex_lock(&delay_stats_mutex);
 380                 if (trans_time_usec < MAX_DELAY_US && trans_time_usec >= 0) {
 381                         delay_stats[ac][trans_time_usec/opt_granularity_usec].csc++;
 382                 }
 383                 if (client_to_server_usec < MAX_DELAY_US && client_to_server_usec >= 0) {
 384                         delay_stats[ac][client_to_server_usec/opt_granularity_usec].cs++;
 385                 }
 386                 if (server_to_client_usec < MAX_DELAY_US && server_to_client_usec >= 0) {
 387                         delay_stats[ac][server_to_client_usec/opt_granularity_usec].sc++;
 388                 }
 389                 pthread_mutex_unlock(&delay_stats_mutex);
 390
 391                 receivers[ac].received++;
 392
 393                 pthread_mutex_lock(&streams[msg.stream].mutex);
 394                 streams[msg.stream].received++;
 395                 pthread_mutex_unlock(&streams[msg.stream].mutex);
 396
 397                 /*if (trans_time_nsec < min_trans_time)
 398                         min_trans_time = trans_time_nsec;*/
 399                 /*printf("seqn= %lu tos= %d start= %lu(s).%lu(ns)"\
 400                          "stop= %lu(s).%lu(ns)\n trans_time = %lums\n",\
 401                          msg.seqn, msg.tos, send_timestamp.tv_sec,\
 402                          send_timestamp.tv_nsec,recv_timestamp.tv_sec,\
 403                          recv_timestamp.tv_nsec, trans_time_msec); */
 404         }
 405 out:
 406         sem_post(&sem_thread_finished);
 407         return NULL;
 408 }
 409
 410 /**
 411  * Send a packet.
 412  *
 413  * @return -1 in case of error, 1 in case of sucessfull send and 0
 414  *         when all buffers are full.
 415  */
 416 #ifndef WITH_FWP
 417 static inline int
 418 send_packet_native(struct stream* stream, union msg_buff* buff)
 419 {
 420         struct iovec  iov;
 421         struct msghdr msg;
 422
 423         iov.iov_base = buff;
 424         iov.iov_len = stream->packet_size;
 425         msg.msg_name = (void*)&stream->rem_addr;
 426         msg.msg_namelen = sizeof(stream->rem_addr);
 427         msg.msg_iov = &iov;
 428         msg.msg_iovlen = 1;
 429         msg.msg_flags = 0;
 430         msg.msg_control = &cmsg;
 431         msg.msg_controllen = cmsg_len;
 432
 433         int ret = 1;
 434
 435         while (sendmsg(ac_sockfd[stream->ac], &msg, 0) < 0) {
 436                 if (errno == EINTR) continue;
 437                 if (errno == EAGAIN) {
 438                         if (opt_wait_for_queue_is_full &&
 439                             !some_queue_is_full &&
 440                             /* We use mutex as atomic test and set */
 441                             (pthread_mutex_trylock(&queue_full_mutex) != EBUSY)) {
 442                                 some_queue_is_full = true;
 443                                 reset_statistics();
 444                         }
 445                         ret = 0;
 446                         break;
 447                 } else {
 448                         perror("Error while sending");
 449                         ret = -1;
 450                         break;
 451                 }
 452         }
 453         return ret;
 454 }
 455 #else
 456 static inline int
 457 send_packet_fwp(struct stream* stream, union msg_buff* buff)
 458 {
 459         int ret = 1;
 460 /*      while (sendto(ac_sockfd[stream->ac], buff, stream->packet_size, 0, */
 461 /*                    (struct sockaddr*)&stream->rem_addr, sizeof(stream->rem_addr)) < 0) { */
 462 /*              if (errno == EINTR) continue; */
 463 /*              if (errno == EAGAIN) { */
 464 /*                      if (opt_wait_for_queue_is_full &&  */
 465 /*                          !some_queue_is_full &&  */
 466 /*                          /\* We use mutex as atomic test and set *\/ */
 467 /*                          (pthread_mutex_trylock(&queue_full_mutex) != EBUSY)) { */
 468 /*                              some_queue_is_full = true; */
 469 /*                              reset_statistics(); */
 470 /*                      } */
 471 /*                      ret = 0; */
 472 /*                      break; */
 473 /*              } else { */
 474 /*                      perror("Error while sending"); */
 475 /*                      ret = -1; */
 476 /*                      break; */
 477 /*              } */
 478 /*      } */
 479         return ret;
 480 }
 481 #endif
 482
 483 static inline void
 484 wait_for_next_send(struct stream* stream, struct timespec *last_send_time)
 485 {
 486         struct timespec time_to_wait, current_time, period, interval;
 487         unsigned period_usec = stream->period_usec;
 488
 489         /*           |~~~+~~~| jitter interval (width = 2*stream->jitter percentage from period)*/
 490         /* |-------------|     nominal period*/
 491         if (stream->jitter) {
 492                 period.tv_nsec = USEC_TO_NSEC*(period_usec*(100-stream->jitter)/100
 493                                                + rand() % (2*period_usec*stream->jitter/100));
 494         } else {
 495                 period.tv_nsec = USEC_TO_NSEC*(period_usec);
 496         }
 497         period.tv_sec = 0;
 498
 499         timespec_add(&time_to_wait, last_send_time, &period);
 500         clock_gettime(CLOCK_REALTIME,&current_time);
 501         timespec_sub(&interval,&time_to_wait,&current_time);
 502         nanosleep(&interval,NULL);
 503 }
 504
 505
 506 void* sender(void* arg)
 507 {
 508         union msg_buff buff;
 509         unsigned long int seqn;
 510         struct stream* stream = (struct stream*) arg;
 511         char stream_desc[100];
 512         int ret;
 513
 514         stream_to_text(stream_desc, sizeof(stream_desc), stream, 0);
 515         printf("%s\n", stream_desc);
 516
 517         if (stream->bandwidth_bps == 0)
 518                 goto out;
 519
 520         seqn = 0;
 521
 522         block_signals();
 523         set_rt_prio(90-stream->ac);
 524
 525         while (!exit_flag) {
 526
 527 /*              buff.msg.seqn = seqn++; */
 528 /*              buff.msg.tos = ac_to_tos[stream->ac]; */
 529                 buff.msg.stream = stream-streams;
 530
 531                 clock_gettime(CLOCK_REALTIME,&buff.msg.send_timestamp);
 532
 533                 ret = send_packet(stream, &buff);
 534                 if (ret < 0) {
 535                         goto out;
 536                 }
 537
 538                 pthread_mutex_lock(&stream->mutex);
 539                 stream->sent++;
 540                 if (ret > 0)
 541                         stream->really_sent++;
 542                 pthread_mutex_unlock(&stream->mutex);
 543
 544 #ifdef DEBUG
 545                 printf("%d", stream->ac);
 546                 fflush(stdout);
 547 #endif
 548
 549                 wait_for_next_send(stream, &buff.msg.send_timestamp);
 550         }
 551 out:
 552         sem_post(&sem_thread_finished);
 553         return NULL;
 554 }
 555
 556 #ifdef WITH_FWP
 557 static int negotiate_contract_for_stream_fwp(struct stream *stream)
 558 {
 559         struct fwp_contract contract;
 560         int vres_id;
 561         int ret;
 562
 563         contract.budget = stream->packet_size;
 564         contract.period_usec = stream->period_usec;
 565         ret = fwp_contract_negotiate(&contract, &vres_id);
 566         if (ret == 0) {
 567                 if (contract.status == FWP_CNT_NEGOTIATED) {
 568                         stream->vres_id = vres_id;
 569                 } else {
 570                         stream->vres_id = -1;
 571                 }
 572         }
 573         return ret;
 574 }
 575 #endif
 576
 577 #ifdef WITH_FWP
 578 static void create_stream_endpoint_fwp(struct stream *stream)
 579 {
 580         /* TODO: How to create an enpoint? */
 581 }
 582 #else
 583 static void create_stream_endpoint_native(struct stream *stream)
 584 {
 585         struct hostent* ph;
 586
 587         memset(&stream->rem_addr,0, sizeof(stream->rem_addr));
 588
 589         stream->rem_addr.sin_family = AF_INET;
 590         ph = gethostbyname(server_addr);
 591         if (ph)
 592                 stream->rem_addr.sin_addr = *((struct in_addr *)ph->h_addr);
 593         else {
 594                 perror("Unknown server");
 595                 exit(1);
 596         }
 597         stream->rem_addr.sin_port = htons(BASE_PORT + stream->ac);
 598 }
 599 #endif
 600
 601 static inline void
 602 calc_stream_params(struct stream *stream)
 603 {
 604         int packet_size;
 605         unsigned period_usec;
 606         int bandwidth;
 607         int ret;
 608
 609         /* If some parameters are not set explicitely, use default values. */
 610         if (stream->bandwidth_bps < 0) stream->bandwidth_bps = opt_def_bandwidth * Kbit;
 611         if (stream->packet_size < 0) stream->packet_size = opt_packet_size;
 612         if (stream->period_usec < 0) stream->period_usec = opt_def_period_msec * MSEC_TO_USEC;
 613
 614         bandwidth = stream->bandwidth_bps;
 615
 616         /* Avoid arithmetic exception. Server thread will exit if
 617            stream->bandwidth_bps == 0. */
 618         if (bandwidth == 0) bandwidth = 1;
 619
 620         if (stream->packet_size) {
 621                 packet_size = stream->packet_size;
 622                 period_usec = SEC_TO_USEC*packet_size*8/bandwidth;
 623                 if (period_usec == 0) period_usec = 1;
 624         } else if (stream->period_usec) {
 625                 period_usec = stream->period_usec;
 626                 packet_size = (long long)bandwidth/8 * period_usec/SEC_TO_USEC;
 627         } else {
 628                 char buf[200];
 629                 stream_to_text(buf, sizeof(buf), stream, 0);
 630                 fprintf(stderr, "Neither packet size nor period was specified for a stream %s\n", buf);
 631                 exit(1);
 632         }
 633
 634         if (packet_size < sizeof(struct msg_t)) {
 635                 fprintf(stderr, "Packet size too small (min %d)\n", sizeof(struct msg_t));
 636                 exit(1);
 637         }
 638
 639         stream->packet_size = packet_size;
 640         stream->period_usec = period_usec;
 641         stream->jitter = opt_jitter;
 642
 643         ret = negotiate_contract_for_stream(stream);
 644         if (ret == 0) {
 645                 create_stream_endpoint(stream);
 646         } else {
 647                 char buf[200];
 648                 stream_to_text(buf, sizeof(buf), stream, 0);
 649                 fprintf(stderr, "Contract hasn't been accepted: %s\n", buf);
 650                 stream->bandwidth_bps = 0;
 651         }
 652 }
 653
 654 /**
 655  * Parse -b parameter.
 656  *
 657  * @param params String to parse
 658  *
 659  * @return NULL in case of success, pointer to a problematic character
 660  *         on error.
 661  */
 662 char* parse_bandwidths(char *params)
 663 {
 664         struct stream *sp = &streams[nr_streams];
 665
 666         while (*params && nr_streams < MAX_STREAMS) {
 667                 char *ac_ids[AC_NUM] = { [AC_VO]="VO", [AC_VI]="VI", [AC_BE]="BE", [AC_BK]="BK" };
 668                 int i;
 669                 char *next_char;
 670
 671                 if (strlen(params) < 2)
 672                         return params;
 673                 for (i=0; i<AC_NUM; i++) {
 674                         if (strncmp(params, ac_ids[i], 2) == 0) {
 675                                 sp->ac = i;
 676                                 params+=strlen(ac_ids[i]);
 677                                 break;
 678                         }
 679                 }
 680                 if (i==AC_NUM)
 681                         return params;
 682
 683                 long bw;
 684                 if (*params == ':') {
 685                         params++;
 686
 687                         bw = strtol(params, &next_char, 10);
 688                         if (next_char == params)
 689                                 return params;
 690                         params = next_char;
 691                 } else
 692                         bw = -1;
 693
 694                 sp->bandwidth_bps = bw*Kbit;
 695
 696                 long period = 0;
 697                 long packet_size = 0;
 698                 if (*params == '@') {
 699                         params++;
 700                         period = strtol(params, &next_char, 10);
 701                         if (period == 0)
 702                                 return params;
 703                         params = next_char;
 704                 }
 705                 else {
 706                         if (*params == '/') {
 707                                 params++;
 708                                 packet_size = strtol(params, &next_char, 10);
 709                                 if (packet_size == 0)
 710                                         return params;
 711                                 params = next_char;
 712                         } else {
 713                                 packet_size = -1;
 714                                 period = -1;
 715                         }
 716                 }
 717                 sp->period_usec = period*MSEC_TO_USEC;
 718                 sp->packet_size = packet_size;
 719
 720
 721
 722                 if (*params != '\0' && *params != ',')
 723                         return params;
 724                 nr_streams++;
 725                 sp++;
 726                 if (*params == ',')
 727                         params++;
 728         }
 729         return NULL;
 730 }
 731
 732 int main(int argc, char *argv[])
 733 {
 734         int ac, i, rc, seconds;
 735         pthread_attr_t attr;
 736         pthread_t thread;
 737         char opt;
 738
 739
 740         while ((opt = getopt(argc, argv, "B:b:c:g:I:j:o:qQ:s:T:")) != -1) {
 741                 switch (opt) {
 742                         case 'B':
 743                                 opt_def_bandwidth = atoi(optarg);
 744                                 break;
 745                         case 'b': {
 746                                 char *error;
 747                                 error = parse_bandwidths(optarg);
 748                                 if (error != NULL) {
 749                                         if (*error == '\0')
 750                                                 fprintf(stderr, "Bandwidth parse error - string to short\n");
 751                                         else
 752                                                 fprintf(stderr, "Bandwidth parse error at '%s'\n", error);
 753                                         exit(1);
 754                                 }
 755                                 break;
 756                         }
 757                         case 'c':
 758                                 opt_count_sec = atoi(optarg);
 759                                 break;
 760                         case 'g':
 761                                 opt_granularity_usec = atoi(optarg);
 762                                 if (opt_granularity_usec < MIN_GRANULARITY) {
 763                                         fprintf(stderr, "Granulatiry too small (min %d)!\n", MIN_GRANULARITY);
 764                                         exit(1);
 765                                 }
 766                                 break;
 767                         case 'I':
 768                                 opt_interface = optarg;
 769                                 break;
 770                         case 'j':
 771                                 opt_jitter = atoi(optarg);
 772                                 break;
 773                         case 'o':
 774                                 opt_output = optarg;
 775                                 break;
 776                         case 'Q':
 777                                 opt_send_buf_size = atoi(optarg);
 778                                 break;
 779                         case 'q':
 780                                 opt_wait_for_queue_is_full = true;
 781                                 break;
 782                         case 's':
 783                                 opt_packet_size = atoi(optarg);
 784                                 break;
 785                         case 'T':
 786                                 opt_def_period_msec = atoi(optarg);
 787                                 break;
 788                         default:
 789                                 fprintf(stderr, "Usage: %s [ options ] server_addr\n\n", argv[0]);
 790                                 fprintf(stderr, "Options:\n");
 791                                 fprintf(stderr, "    -B  default bandwidth for -b option [kbit]\n");
 792                                 fprintf(stderr, "    -b  bandwidth of streams (VO|VI|BE|BK)[:<kbit>][@<msec> or /<bytes>][,...]\n");
 793                                 fprintf(stderr, "    -c  count (number of seconds to run)\n");
 794                                 fprintf(stderr, "    -g  histogram granularity [usec]\n");
 795                                 fprintf(stderr, "    -I  <interface> send packets from this interface");
 796                                 fprintf(stderr, "    -j  send jitter (0-100) [%%]\n");
 797                                 fprintf(stderr, "    -o  output filename (.dat will be appended)\n");
 798                                 fprintf(stderr, "    -q  gather statistics only after some queue becomes full\n");
 799                                 fprintf(stderr, "    -Q  <bytes> set size for socket send buffers\n");
 800                                 fprintf(stderr, "    -s  size of data payload in packets [bytes] (default: %d)\n", opt_packet_size);
 801                                 fprintf(stderr, "    -T  default period for -b option [msec]\n");
 802                                 exit(1);
 803                 }
 804         }
 805         if (opt_packet_size && opt_def_period_msec) {
 806                 fprintf(stderr, "Error: Nonzero -T and -s can't be used together!.\n");
 807                 exit(1);
 808         }
 809
 810         if (optind < argc) {
 811                 server_addr = argv[optind];
 812         } else {
 813                 fprintf(stderr, "Expected server address argument\n");
 814                 exit(1);
 815         }
 816
 817         if (nr_streams == 0)
 818                 parse_bandwidths("BE");
 819
 820         pthread_attr_init(&attr);
 821
 822         snprintf(logfname, sizeof(logfname), "%s.dat", opt_output);
 823
 824         if ((logfd = fopen(logfname,"w+")) == NULL) {
 825                 fprintf(stderr,"Can not open %s\n", logfname);
 826                 exit(1);
 827         }
 828         if (signal(SIGTERM, stopper) == SIG_ERR) {
 829                 perror("Error in signal registration");
 830                 exit(1);
 831         }
 832
 833         if (signal(SIGINT, stopper) == SIG_ERR) {
 834                 perror("Signal handler registration error");
 835                 exit(1);
 836         }
 837
 838         struct sigaction sa;
 839         sa.sa_handler = empty_handler;
 840         sa.sa_flags = 0;        /* don't restart syscalls */
 841
 842         if (sigaction(SIGUSR1, &sa, NULL) < 0) {
 843                 perror("sigaction error");
 844                 exit(1);
 845         }
 846
 847         sem_init(&sem_thread_finished, 0, 0);
 848
 849         reset_statistics();
 850
 851         /* create four receivers each per AC */
 852         for (ac = AC_NUM - 1; ac >= 0; ac--) {
 853                 ac_sockfd[ac] = create_ac_socket(ac);
 854                 if (ac_sockfd[ac] < 0) {
 855                         return 1;
 856                 }
 857                 rc = pthread_create(&receivers[ac].thread, &attr, receiver, (void*) ac);
 858                 if (rc) {
 859                         fprintf(stderr, "Error while creating receiver %d\n",rc);
 860                         return 1;
 861                 }
 862         }
 863
 864         if (opt_interface) {
 865                 struct ifreq ifr;
 866
 867                 memset(&ifr, 0, sizeof(ifr));
 868                 strncpy(ifr.ifr_name, opt_interface, IFNAMSIZ-1);
 869                 if (ioctl(ac_sockfd[AC_VO], SIOCGIFINDEX, &ifr) < 0) {
 870                         fprintf(stderr, "unknown iface %s\n", opt_interface);
 871                         exit(1);
 872                 }
 873                 cmsg.ipi.ipi_ifindex = ifr.ifr_ifindex;
 874                 cmsg_len = sizeof(cmsg);
 875         }
 876         /* create sendpoints */
 877         for (i = 0; i < nr_streams; i++) {
 878                 struct stream *s = &streams[i];
 879                 pthread_mutex_init(&s->mutex, NULL);
 880                 calc_stream_params(s);
 881                 rc = pthread_create(&thread, &attr, sender, (void*) s);
 882                 if (rc) {
 883                         fprintf(stderr, "Error while creating sender %d\n",rc);
 884                         return 1;
 885                 }
 886         }
 887
 888         seconds = 0;
 889         while (!exit_flag) {
 890                 sleep(1);
 891                 seconds++;
 892                 fprintf(stderr, "\r%3ds", seconds);
 893                 for (ac = 0; ac < AC_NUM; ac++) {
 894                         int delta = receivers[ac].received - receivers[ac].last_received;
 895                         receivers[ac].last_received = receivers[ac].received;
 896                         fprintf(stderr, " %s %5d %4d/s", ac_to_text[ac], receivers[ac].received, delta);
 897                 }
 898                 fflush(stderr);
 899                 if (seconds == opt_count_sec)
 900                         stopper();
 901         }
 902
 903         fprintf(stderr, "\nWaiting for threads to finish\n");
 904         /* Wait for all threads to finish */
 905         for (i=0; i < nr_streams + AC_NUM; i++) {
 906                 sem_wait(&sem_thread_finished);
 907         }
 908         struct timespec end_timestamp, measure_length;
 909         clock_gettime(CLOCK_REALTIME,&end_timestamp);
 910         timespec_sub(&measure_length, &end_timestamp, &reset_timestamp);
 911
 912         save_results(argc, argv, timespec2usec(&measure_length));
 913
 914         return 0;
 915 }