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                                         fprintf(logfd,"%f %f %f %f\n", i*opt_granularity_usec/1000.0,
 246                                                 (double)integral.csc*100.0 / send_count[ac],
 247                                                 (double)integral.cs *100.0 / send_count[ac],
 248                                                 (double)integral.sc *100.0 / send_count[ac]
 249                                                 );
 250                                         last = integral;
 251                                 }
 252                                 if (i>0) {
 253                                         integral.csc += delay_stats[ac][i-1].csc;
 254                                         integral.sc  += delay_stats[ac][i-1].sc;
 255                                         integral.cs  += delay_stats[ac][i-1].cs;
 256                                 }
 257                         }
 258                 }
 259                 fprintf(logfd,"\n\n");
 260         }
 261
 262         fprintf(stderr, "finished.\n");
 263         fclose(logfd);
 264
 265         exit(0);
 266 }
 267
 268 int create_ac_socket(unsigned int ac)
 269 {
 270         int sockfd;
 271         unsigned int yes=1, tos;
 272
 273
 274         if ((sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
 275         {
 276                 perror("Unable to open socket");
 277                 return -1;
 278         }
 279         if (fcntl(sockfd, F_SETFL, O_NONBLOCK) != 0) {
 280                 perror("set non-blocking socket");
 281                 return -1;
 282         }
 283         if (setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(int)) == -1) {
 284                 perror("Unable to set socket");
 285                 return -1;
 286         }
 287
 288         if (opt_send_buf_size >= 0) {
 289                 if (setsockopt(sockfd,SOL_SOCKET,SO_SNDBUF,&opt_send_buf_size,sizeof(opt_send_buf_size)) == -1) {
 290                         perror("Unable to set socket buffer size");
 291                         return -1;
 292                 }
 293         }
 294
 295
 296         //tos = ((AC_NUM - ac) *2 - 1)*32;
 297         tos = ac_to_tos[ac];
 298         if (setsockopt(sockfd, SOL_IP, IP_TOS, &tos, sizeof(tos))) {
 299                 perror("Unable to set TOS");
 300                 close(sockfd);
 301                 return -1;
 302         }
 303
 304         return sockfd;
 305 }
 306
 307 void empty_handler()
 308 {
 309 }
 310
 311 void reset_statistics()
 312 {
 313         int i;
 314         for (i = 0; i < nr_streams; i++) {
 315                 pthread_mutex_lock(&streams[i].mutex);
 316                 streams[i].sent = 0;
 317                 streams[i].really_sent = 0;
 318                 streams[i].received = 0;
 319                 pthread_mutex_unlock(&streams[i].mutex);
 320         }
 321         pthread_mutex_lock(&delay_stats_mutex);
 322         clock_gettime(CLOCK_REALTIME, &reset_timestamp);
 323         memset(delay_stats, 0, sizeof(delay_stats));
 324         pthread_mutex_unlock(&delay_stats_mutex);
 325 }
 326
 327 void* receiver(void* queue)
 328 {
 329         struct msg_t    msg;
 330         struct  sockaddr_in rem_addr;
 331         int     mlen, ret;
 332         unsigned int ac, rem_addr_length;
 333         long long int trans_time_usec, client_to_server_usec, server_to_client_usec;
 334         long long int min_trans_time;
 335         struct timespec send_timestamp, server_timestamp, recv_timestamp;
 336         fd_set fdset;
 337
 338         min_trans_time = ~0;
 339
 340         block_signals();
 341         set_rt_prio(99);
 342
 343         ac = (int)queue;
 344         rem_addr_length = sizeof(rem_addr);
 345         FD_ZERO(&fdset);
 346         while (!exit_flag) {
 347                 FD_SET(ac_sockfd[ac], &fdset);
 348                 ret = select(ac_sockfd[ac]+1, &fdset, NULL, NULL, NULL);
 349                 if (ret < 0) {
 350                         if (errno == EINTR) continue;
 351                         perror("receiver select");
 352                         goto out;
 353                 }
 354                 mlen = recvfrom(ac_sockfd[ac], &msg, sizeof(msg), 0,
 355                                 (struct sockaddr*)&rem_addr, &rem_addr_length);
 356                 if (mlen < 0) {
 357                         perror("Chyba pri prijimani pozadavku");
 358                         goto out;
 359                 }
 360                 clock_gettime(CLOCK_REALTIME,&recv_timestamp);
 361                 send_timestamp = msg.send_timestamp;
 362                 server_timestamp = msg.sendback_timestamp;
 363
 364                 /* Check whether this message was sent after reset_statistics() */
 365
 366                 if ((ret = timespec_sub_usec(&send_timestamp, &reset_timestamp)) < 0) {
 367                         continue; /* If so, don't count it */
 368                 }
 369
 370                 trans_time_usec = timespec_sub_usec(&recv_timestamp ,&send_timestamp) / 2;
 371                 client_to_server_usec = timespec_sub_usec(&server_timestamp, &send_timestamp);
 372                 server_to_client_usec = timespec_sub_usec(&recv_timestamp, &server_timestamp);
 373
 374                 pthread_mutex_lock(&delay_stats_mutex);
 375                 if (trans_time_usec < MAX_DELAY_US && trans_time_usec >= 0) {
 376                         delay_stats[ac][trans_time_usec/opt_granularity_usec].csc++;
 377                 }
 378                 if (client_to_server_usec < MAX_DELAY_US && client_to_server_usec >= 0) {
 379                         delay_stats[ac][client_to_server_usec/opt_granularity_usec].cs++;
 380                 }
 381                 if (server_to_client_usec < MAX_DELAY_US && server_to_client_usec >= 0) {
 382                         delay_stats[ac][server_to_client_usec/opt_granularity_usec].sc++;
 383                 }
 384                 pthread_mutex_unlock(&delay_stats_mutex);
 385
 386                 receivers[ac].received++;
 387
 388                 pthread_mutex_lock(&streams[msg.stream].mutex);
 389                 streams[msg.stream].received++;
 390                 pthread_mutex_unlock(&streams[msg.stream].mutex);
 391
 392                 /*if (trans_time_nsec < min_trans_time)
 393                         min_trans_time = trans_time_nsec;*/
 394                 /*printf("seqn= %lu tos= %d start= %lu(s).%lu(ns)"\
 395                          "stop= %lu(s).%lu(ns)\n trans_time = %lums\n",\
 396                          msg.seqn, msg.tos, send_timestamp.tv_sec,\
 397                          send_timestamp.tv_nsec,recv_timestamp.tv_sec,\
 398                          recv_timestamp.tv_nsec, trans_time_msec); */
 399         }
 400 out:
 401         sem_post(&sem_thread_finished);
 402         return NULL;
 403 }
 404
 405 /**
 406  * Send a packet.
 407  *
 408  * @return -1 in case of error, 1 in case of sucessfull send and 0
 409  *         when all buffers are full.
 410  */
 411 #ifndef WITH_FWP
 412 static inline int
 413 send_packet_native(struct stream* stream, union msg_buff* buff)
 414 {
 415         struct iovec  iov;
 416         struct msghdr msg;
 417
 418         iov.iov_base = buff;
 419         iov.iov_len = stream->packet_size;
 420         msg.msg_name = (void*)&stream->rem_addr;
 421         msg.msg_namelen = sizeof(stream->rem_addr);
 422         msg.msg_iov = &iov;
 423         msg.msg_iovlen = 1;
 424         msg.msg_flags = 0;
 425         msg.msg_control = &cmsg;
 426         msg.msg_controllen = cmsg_len;
 427
 428         int ret = 1;
 429
 430         while (sendmsg(ac_sockfd[stream->ac], &msg, 0) < 0) {
 431                 if (errno == EINTR) continue;
 432                 if (errno == EAGAIN) {
 433                         if (opt_wait_for_queue_is_full &&
 434                             !some_queue_is_full &&
 435                             /* We use mutex as atomic test and set */
 436                             (pthread_mutex_trylock(&queue_full_mutex) != EBUSY)) {
 437                                 some_queue_is_full = true;
 438                                 reset_statistics();
 439                         }
 440                         ret = 0;
 441                         break;
 442                 } else {
 443                         perror("Error while sending");
 444                         ret = -1;
 445                         break;
 446                 }
 447         }
 448         return ret;
 449 }
 450 #else
 451 static inline int
 452 send_packet_fwp(struct stream* stream, union msg_buff* buff)
 453 {
 454         int ret = 1;
 455 /*      while (sendto(ac_sockfd[stream->ac], buff, stream->packet_size, 0, */
 456 /*                    (struct sockaddr*)&stream->rem_addr, sizeof(stream->rem_addr)) < 0) { */
 457 /*              if (errno == EINTR) continue; */
 458 /*              if (errno == EAGAIN) { */
 459 /*                      if (opt_wait_for_queue_is_full &&  */
 460 /*                          !some_queue_is_full &&  */
 461 /*                          /\* We use mutex as atomic test and set *\/ */
 462 /*                          (pthread_mutex_trylock(&queue_full_mutex) != EBUSY)) { */
 463 /*                              some_queue_is_full = true; */
 464 /*                              reset_statistics(); */
 465 /*                      } */
 466 /*                      ret = 0; */
 467 /*                      break; */
 468 /*              } else { */
 469 /*                      perror("Error while sending"); */
 470 /*                      ret = -1; */
 471 /*                      break; */
 472 /*              } */
 473 /*      } */
 474         return ret;
 475 }
 476 #endif
 477
 478 static inline void
 479 wait_for_next_send(struct stream* stream, struct timespec *last_send_time)
 480 {
 481         struct timespec time_to_wait, current_time, period, interval;
 482         unsigned period_usec = stream->period_usec;
 483
 484         /*           |~~~+~~~| jitter interval (width = 2*stream->jitter percentage from period)*/
 485         /* |-------------|     nominal period*/
 486         if (stream->jitter) {
 487                 period.tv_nsec = USEC_TO_NSEC*(period_usec*(100-stream->jitter)/100
 488                                                + rand() % (2*period_usec*stream->jitter/100));
 489         } else {
 490                 period.tv_nsec = USEC_TO_NSEC*(period_usec);
 491         }
 492         period.tv_sec = 0;
 493
 494         timespec_add(&time_to_wait, last_send_time, &period);
 495         clock_gettime(CLOCK_REALTIME,&current_time);
 496         timespec_sub(&interval,&time_to_wait,&current_time);
 497         nanosleep(&interval,NULL);
 498 }
 499
 500
 501 void* sender(void* arg)
 502 {
 503         union msg_buff buff;
 504         unsigned long int seqn;
 505         struct stream* stream = (struct stream*) arg;
 506         char stream_desc[100];
 507         int ret;
 508
 509         stream_to_text(stream_desc, sizeof(stream_desc), stream, 0);
 510         printf("%s\n", stream_desc);
 511
 512         if (stream->bandwidth_bps == 0)
 513                 goto out;
 514
 515         seqn = 0;
 516
 517         block_signals();
 518         set_rt_prio(90-stream->ac);
 519
 520         while (!exit_flag) {
 521
 522 /*              buff.msg.seqn = seqn++; */
 523 /*              buff.msg.tos = ac_to_tos[stream->ac]; */
 524                 buff.msg.stream = stream-streams;
 525
 526                 clock_gettime(CLOCK_REALTIME,&buff.msg.send_timestamp);
 527
 528                 ret = send_packet(stream, &buff);
 529                 if (ret < 0) {
 530                         goto out;
 531                 }
 532
 533                 pthread_mutex_lock(&stream->mutex);
 534                 stream->sent++;
 535                 if (ret > 0)
 536                         stream->really_sent++;
 537                 pthread_mutex_unlock(&stream->mutex);
 538
 539 #ifdef DEBUG
 540                 printf("%d", stream->ac);
 541                 fflush(stdout);
 542 #endif
 543
 544                 wait_for_next_send(stream, &buff.msg.send_timestamp);
 545         }
 546 out:
 547         sem_post(&sem_thread_finished);
 548         return NULL;
 549 }
 550
 551 #ifdef WITH_FWP
 552 static int negotiate_contract_for_stream_fwp(struct stream *stream)
 553 {
 554         struct fwp_contract contract;
 555         int vres_id;
 556         int ret;
 557
 558         contract.budget = stream->packet_size;
 559         contract.period_usec = stream->period_usec;
 560         ret = fwp_contract_negotiate(&contract, &vres_id);
 561         if (ret == 0) {
 562                 if (contract.status == FWP_CNT_NEGOTIATED) {
 563                         stream->vres_id = vres_id;
 564                 } else {
 565                         stream->vres_id = -1;
 566                 }
 567         }
 568         return ret;
 569 }
 570 #endif
 571
 572 #ifdef WITH_FWP
 573 static void create_stream_endpoint_fwp(struct stream *stream)
 574 {
 575         /* TODO: How to create an enpoint? */
 576 }
 577 #else
 578 static void create_stream_endpoint_native(struct stream *stream)
 579 {
 580         struct hostent* ph;
 581
 582         memset(&stream->rem_addr,0, sizeof(stream->rem_addr));
 583
 584         stream->rem_addr.sin_family = AF_INET;
 585         ph = gethostbyname(server_addr);
 586         if (ph)
 587                 stream->rem_addr.sin_addr = *((struct in_addr *)ph->h_addr);
 588         else {
 589                 perror("Unknown server");
 590                 exit(1);
 591         }
 592         stream->rem_addr.sin_port = htons(BASE_PORT + stream->ac);
 593 }
 594 #endif
 595
 596 static inline void
 597 calc_stream_params(struct stream *stream)
 598 {
 599         int packet_size;
 600         unsigned period_usec;
 601         int bandwidth;
 602         int ret;
 603
 604         /* If some parameters are not set explicitely, use default values. */
 605         if (stream->bandwidth_bps < 0) stream->bandwidth_bps = opt_def_bandwidth * Kbit;
 606         if (stream->packet_size < 0) stream->packet_size = opt_packet_size;
 607         if (stream->period_usec < 0) stream->period_usec = opt_def_period_msec * MSEC_TO_USEC;
 608
 609         bandwidth = stream->bandwidth_bps;
 610
 611         /* Avoid arithmetic exception. Server thread will exit if
 612            stream->bandwidth_bps == 0. */
 613         if (bandwidth == 0) bandwidth = 1;
 614
 615         if (stream->packet_size) {
 616                 packet_size = stream->packet_size;
 617                 period_usec = SEC_TO_USEC*packet_size*8/bandwidth;
 618                 if (period_usec == 0) period_usec = 1;
 619         } else if (stream->period_usec) {
 620                 period_usec = stream->period_usec;
 621                 packet_size = (long long)bandwidth/8 * period_usec/SEC_TO_USEC;
 622         } else {
 623                 char buf[200];
 624                 stream_to_text(buf, sizeof(buf), stream, 0);
 625                 fprintf(stderr, "Neither packet size nor period was specified for a stream %s\n", buf);
 626                 exit(1);
 627         }
 628
 629         if (packet_size < sizeof(struct msg_t)) {
 630                 fprintf(stderr, "Packet size too small (min %d)\n", sizeof(struct msg_t));
 631                 exit(1);
 632         }
 633
 634         stream->packet_size = packet_size;
 635         stream->period_usec = period_usec;
 636         stream->jitter = opt_jitter;
 637
 638         ret = negotiate_contract_for_stream(stream);
 639         if (ret == 0) {
 640                 create_stream_endpoint(stream);
 641         } else {
 642                 char buf[200];
 643                 stream_to_text(buf, sizeof(buf), stream, 0);
 644                 fprintf(stderr, "Contract hasn't been accepted: %s\n", buf);
 645                 stream->bandwidth_bps = 0;
 646         }
 647 }
 648
 649 /**
 650  * Parse -b parameter.
 651  *
 652  * @param params String to parse
 653  *
 654  * @return NULL in case of success, pointer to a problematic character
 655  *         on error.
 656  */
 657 char* parse_bandwidths(char *params)
 658 {
 659         struct stream *sp = &streams[nr_streams];
 660
 661         while (*params && nr_streams < MAX_STREAMS) {
 662                 char *ac_ids[AC_NUM] = { [AC_VO]="VO", [AC_VI]="VI", [AC_BE]="BE", [AC_BK]="BK" };
 663                 int i;
 664                 char *next_char;
 665
 666                 if (strlen(params) < 2)
 667                         return params;
 668                 for (i=0; i<AC_NUM; i++) {
 669                         if (strncmp(params, ac_ids[i], 2) == 0) {
 670                                 sp->ac = i;
 671                                 params+=strlen(ac_ids[i]);
 672                                 break;
 673                         }
 674                 }
 675                 if (i==AC_NUM)
 676                         return params;
 677
 678                 long bw;
 679                 if (*params == ':') {
 680                         params++;
 681
 682                         bw = strtol(params, &next_char, 10);
 683                         if (next_char == params)
 684                                 return params;
 685                         params = next_char;
 686                 } else
 687                         bw = -1;
 688
 689                 sp->bandwidth_bps = bw*Kbit;
 690
 691                 long period = 0;
 692                 long packet_size = 0;
 693                 if (*params == '@') {
 694                         params++;
 695                         period = strtol(params, &next_char, 10);
 696                         if (period == 0)
 697                                 return params;
 698                         params = next_char;
 699                 }
 700                 else {
 701                         if (*params == '/') {
 702                                 params++;
 703                                 packet_size = strtol(params, &next_char, 10);
 704                                 if (packet_size == 0)
 705                                         return params;
 706                                 params = next_char;
 707                         } else {
 708                                 packet_size = -1;
 709                                 period = -1;
 710                         }
 711                 }
 712                 sp->period_usec = period*MSEC_TO_USEC;
 713                 sp->packet_size = packet_size;
 714
 715
 716
 717                 if (*params != '\0' && *params != ',')
 718                         return params;
 719                 nr_streams++;
 720                 sp++;
 721                 if (*params == ',')
 722                         params++;
 723         }
 724         return NULL;
 725 }
 726
 727 int main(int argc, char *argv[])
 728 {
 729         int ac, i, rc, seconds;
 730         pthread_attr_t attr;
 731         pthread_t thread;
 732         char opt;
 733
 734
 735         while ((opt = getopt(argc, argv, "B:b:c:g:I:j:o:qQ:s:T:")) != -1) {
 736                 switch (opt) {
 737                         case 'B':
 738                                 opt_def_bandwidth = atoi(optarg);
 739                                 break;
 740                         case 'b': {
 741                                 char *error;
 742                                 error = parse_bandwidths(optarg);
 743                                 if (error != NULL) {
 744                                         if (*error == '\0')
 745                                                 fprintf(stderr, "Bandwidth parse error - string to short\n");
 746                                         else
 747                                                 fprintf(stderr, "Bandwidth parse error at '%s'\n", error);
 748                                         exit(1);
 749                                 }
 750                                 break;
 751                         }
 752                         case 'c':
 753                                 opt_count_sec = atoi(optarg);
 754                                 break;
 755                         case 'g':
 756                                 opt_granularity_usec = atoi(optarg);
 757                                 if (opt_granularity_usec < MIN_GRANULARITY) {
 758                                         fprintf(stderr, "Granulatiry too small (min %d)!\n", MIN_GRANULARITY);
 759                                         exit(1);
 760                                 }
 761                                 break;
 762                         case 'I':
 763                                 opt_interface = optarg;
 764                                 break;
 765                         case 'j':
 766                                 opt_jitter = atoi(optarg);
 767                                 break;
 768                         case 'o':
 769                                 opt_output = optarg;
 770                                 break;
 771                         case 'Q':
 772                                 opt_send_buf_size = atoi(optarg);
 773                                 break;
 774                         case 'q':
 775                                 opt_wait_for_queue_is_full = true;
 776                                 break;
 777                         case 's':
 778                                 opt_packet_size = atoi(optarg);
 779                                 break;
 780                         case 'T':
 781                                 opt_def_period_msec = atoi(optarg);
 782                                 break;
 783                         default:
 784                                 fprintf(stderr, "Usage: %s [ options ] server_addr\n\n", argv[0]);
 785                                 fprintf(stderr, "Options:\n");
 786                                 fprintf(stderr, "    -B  default bandwidth for -b option [kbit]\n");
 787                                 fprintf(stderr, "    -b  bandwidth of streams (VO|VI|BE|BK)[:<kbit>][@<msec> or /<bytes>][,...]\n");
 788                                 fprintf(stderr, "    -c  count (number of seconds to run)\n");
 789                                 fprintf(stderr, "    -g  histogram granularity [usec]\n");
 790                                 fprintf(stderr, "    -I  <interface> send packets from this interface");
 791                                 fprintf(stderr, "    -j  send jitter (0-100) [%%]\n");
 792                                 fprintf(stderr, "    -o  output filename (.dat will be appended)\n");
 793                                 fprintf(stderr, "    -q  gather statistics only after some queue becomes full\n");
 794                                 fprintf(stderr, "    -Q  <bytes> set size for socket send buffers\n");
 795                                 fprintf(stderr, "    -s  size of data payload in packets [bytes] (default: %d)\n", opt_packet_size);
 796                                 fprintf(stderr, "    -T  default period for -b option [msec]\n");
 797                                 exit(1);
 798                 }
 799         }
 800         if (opt_packet_size && opt_def_period_msec) {
 801                 fprintf(stderr, "Error: Nonzero -T and -s can't be used together!.\n");
 802                 exit(1);
 803         }
 804
 805         if (optind < argc) {
 806                 server_addr = argv[optind];
 807         } else {
 808                 fprintf(stderr, "Expected server address argument\n");
 809                 exit(1);
 810         }
 811
 812         if (nr_streams == 0)
 813                 parse_bandwidths("BE");
 814
 815         pthread_attr_init(&attr);
 816
 817         snprintf(logfname, sizeof(logfname), "%s.dat", opt_output);
 818
 819         if ((logfd = fopen(logfname,"w+")) == NULL) {
 820                 fprintf(stderr,"Can not open %s\n", logfname);
 821                 exit(1);
 822         }
 823         if (signal(SIGTERM, stopper) == SIG_ERR) {
 824                 perror("Error in signal registration");
 825                 exit(1);
 826         }
 827
 828         if (signal(SIGINT, stopper) == SIG_ERR) {
 829                 perror("Signal handler registration error");
 830                 exit(1);
 831         }
 832
 833         struct sigaction sa;
 834         sa.sa_handler = empty_handler;
 835         sa.sa_flags = 0;        /* don't restart syscalls */
 836
 837         if (sigaction(SIGUSR1, &sa, NULL) < 0) {
 838                 perror("sigaction error");
 839                 exit(1);
 840         }
 841
 842         sem_init(&sem_thread_finished, 0, 0);
 843
 844         reset_statistics();
 845
 846         /* create four receivers each per AC */
 847         for (ac = AC_NUM - 1; ac >= 0; ac--) {
 848                 ac_sockfd[ac] = create_ac_socket(ac);
 849                 if (ac_sockfd[ac] < 0) {
 850                         return 1;
 851                 }
 852                 rc = pthread_create(&receivers[ac].thread, &attr, receiver, (void*) ac);
 853                 if (rc) {
 854                         fprintf(stderr, "Error while creating receiver %d\n",rc);
 855                         return 1;
 856                 }
 857         }
 858
 859         if (opt_interface) {
 860                 struct ifreq ifr;
 861
 862                 memset(&ifr, 0, sizeof(ifr));
 863                 strncpy(ifr.ifr_name, opt_interface, IFNAMSIZ-1);
 864                 if (ioctl(ac_sockfd[AC_VO], SIOCGIFINDEX, &ifr) < 0) {
 865                         fprintf(stderr, "unknown iface %s\n", opt_interface);
 866                         exit(1);
 867                 }
 868                 cmsg.ipi.ipi_ifindex = ifr.ifr_ifindex;
 869                 cmsg_len = sizeof(cmsg);
 870         }
 871         /* create sendpoints */
 872         for (i = 0; i < nr_streams; i++) {
 873                 struct stream *s = &streams[i];
 874                 pthread_mutex_init(&s->mutex, NULL);
 875                 calc_stream_params(s);
 876                 rc = pthread_create(&thread, &attr, sender, (void*) s);
 877                 if (rc) {
 878                         fprintf(stderr, "Error while creating sender %d\n",rc);
 879                         return 1;
 880                 }
 881         }
 882
 883         seconds = 0;
 884         while (!exit_flag) {
 885                 sleep(1);
 886                 seconds++;
 887                 fprintf(stderr, "\r%3ds", seconds);
 888                 for (ac = 0; ac < AC_NUM; ac++) {
 889                         int delta = receivers[ac].received - receivers[ac].last_received;
 890                         receivers[ac].last_received = receivers[ac].received;
 891                         fprintf(stderr, " %s %5d %4d/s", ac_to_text[ac], receivers[ac].received, delta);
 892                 }
 893                 fflush(stderr);
 894                 if (seconds == opt_count_sec)
 895                         stopper();
 896         }
 897
 898         fprintf(stderr, "\nWaiting for threads to finish\n");
 899         /* Wait for all threads to finish */
 900         for (i=0; i < nr_streams + AC_NUM; i++) {
 901                 sem_wait(&sem_thread_finished);
 902         }
 903         struct timespec end_timestamp, measure_length;
 904         clock_gettime(CLOCK_REALTIME,&end_timestamp);
 905         timespec_sub(&measure_length, &end_timestamp, &reset_timestamp);
 906
 907         save_results(argc, argv, timespec2usec(&measure_length));
 908
 909         return 0;
 910 }