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_confdefs.h>
  25 #include <fwp.h>
  26 #include <fwp_vres.h>
  27 #endif
  28
  29 #define MAX_STREAMS  10
  30 #define MIN_GRANULARITY 100
  31
  32 unsigned opt_packet_size = 800;
  33 int opt_send_buf_size = -1;
  34 unsigned opt_period_usec = 10*MSEC_TO_USEC;
  35 char    *opt_interface;
  36 unsigned opt_jitter = 0;
  37 char    *opt_output = "delay_stats";
  38 unsigned opt_count_sec = 0;
  39 unsigned opt_def_bandwidth = 200;
  40 unsigned opt_def_period_msec = 0;
  41 int opt_granularity_usec = MIN_GRANULARITY;
  42 bool opt_wait_for_queue_is_full; /* Don't gather any statistics until any queue is full */
  43 char *opt_comment = NULL;
  44
  45 bool some_queue_is_full = false;
  46 struct timespec reset_timestamp;
  47
  48 /* Locked when some queue is full to prevent multiple resets of
  49    statstics. */
  50 pthread_mutex_t queue_full_mutex = PTHREAD_MUTEX_INITIALIZER;
  51
  52 int ac_sockfd[AC_NUM];
  53
  54 struct receiver {
  55         pthread_t thread;
  56         unsigned received, last_received;
  57 } receivers[AC_NUM];
  58
  59 FILE* logfd;
  60 char* server_addr;
  61 char logfname[100];
  62
  63 /* maximal traffic delay in ms - 10 s*/
  64 #define MAX_DELAY_US 10000000
  65
  66 struct delay_stat {
  67         unsigned csc;           /* Client-server-client delay divided by 2 */
  68         unsigned cs;            /* Client-server delay */
  69         unsigned sc;            /* Server-client delay */
  70 };
  71
  72 struct delay_stat delay_stats[AC_NUM][MAX_DELAY_US/MIN_GRANULARITY];
  73 pthread_mutex_t delay_stats_mutex = PTHREAD_MUTEX_INITIALIZER;
  74
  75 /*struct ac_stats[AC_NUM] {
  76    unsigned long int min_trans_time;
  77    unsigned long int sum_trans_time;
  78    struct timespec   recv_timestamp;
  79    struct timespec   send_timestamp;
  80 };*/
  81
  82 struct stream {
  83         /* Input parameters */
  84         enum ac ac;             /*  */
  85         int bandwidth_bps;      /* bits per second */
  86         int jitter;             /* percent */
  87         /* Mulualy exclusive input parameters */
  88         int packet_size;
  89         long period_usec;       /* all time units are in microseconds */
  90
  91         /* Internal fields */
  92 #ifndef WITH_FWP
  93         struct sockaddr_in rem_addr;
  94 #else
  95         fwp_endpoint_d_t endpoint;
  96         fwp_vres_d_t vres;
  97 #endif
  98
  99         /* Statistics */
 100         pthread_mutex_t mutex;
 101         unsigned long long sent, really_sent, received;
 102 };
 103
 104 static struct cmsg_ipi {
 105         struct cmsghdr cm;
 106         struct in_pktinfo ipi;
 107 } cmsg = { {sizeof(struct cmsg_ipi), SOL_IP, IP_PKTINFO},
 108            {0, }};
 109 int cmsg_len = 0;
 110
 111 /*
 112 struct send_endpoint sepoint[] = {
 113         { .ac = AC_VO, .period_usec=200*MSEC_TO_USEC, .bandwidth_bps = 34*Kbit },
 114         { .ac = AC_VI, .period_usec=25*MSEC_TO_USEC, .bandwidth_bps =  480*Kbit },
 115         { .ac = AC_BE, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
 116         { .ac = AC_BK, .period_usec=40*MSEC_TO_USEC, .bandwidth_bps =  300*Kbit },
 117 //      { .ac = AC_VI, .period_usec=17*MSEC_TO_USEC, .bandwidth_bps =  675*Kbit },
 118 };
 119 */
 120
 121 struct stream streams[MAX_STREAMS];
 122
 123 unsigned int nr_streams = 0;
 124
 125 sem_t sem_thread_finished;
 126
 127 bool exit_flag = false;
 128
 129 #ifdef WITH_FWP
 130 #define negotiate_contract_for_stream(s) negotiate_contract_for_stream_fwp(s)
 131 #define create_stream_endpoint(s) create_stream_endpoint_fwp(s)
 132 #define send_packet(s, b) send_packet_fwp(s, b)
 133 #else
 134 #define negotiate_contract_for_stream(s) 0
 135 #define create_stream_endpoint(s) create_stream_endpoint_native(s)
 136 #define send_packet(s, b) send_packet_native(s, b)
 137 #endif
 138
 139 void stopper()
 140 {
 141         int i;
 142         exit_flag = true;
 143
 144         /* Interrupt all receivers */
 145         for (i=0; i < AC_NUM; i++) {
 146                 pthread_kill(receivers[i].thread, SIGUSR1);
 147         }
 148 }
 149
 150 void stream_to_text(char *stream_desc, size_t n, struct stream *stream, long long useconds)
 151 {
 152         char buf[3][12];
 153         char real[100];
 154
 155         if (useconds) {
 156                 snprintf(real, sizeof(real), "; real: %s sent %lld (%lld/s), received %lld (%lld/s)",
 157                          bandwidth_to_text(buf[0], (long long)stream->really_sent*stream->packet_size*8*SEC_TO_USEC/useconds),
 158                          stream->sent, stream->sent*SEC_TO_USEC/useconds,
 159                          stream->received, stream->received*SEC_TO_USEC/useconds);
 160         } else {
 161                 real[0]=0;
 162         }
 163
 164         snprintf(stream_desc, n, "%d: %s %s (%d bytes per %s +-%s, %d packets/s)%s",
 165                  stream-streams, ac_to_text[stream->ac], bandwidth_to_text(buf[0], stream->bandwidth_bps),
 166                  stream->packet_size, usec_to_text(buf[1], stream->period_usec),
 167                  usec_to_text(buf[2], stream->jitter*stream->period_usec/100),
 168                  (int)(SEC_TO_USEC/stream->period_usec), real);
 169 }
 170
 171 void save_results(int argc, char *argv[], int useconds)
 172 {
 173         int ac, i, maxi;
 174         const int mini = 3000/opt_granularity_usec;
 175         bool allzeros;
 176         unsigned send_count[AC_NUM];
 177
 178         fprintf(stderr, "Writing data to %s... ", logfname);
 179         fflush(stderr);
 180
 181         fprintf(logfd, "# Invoked as: ");
 182         for (i=0; i<argc; i++) fprintf(logfd, "%s ", argv[i]);
 183         if (opt_comment) {
 184                 fprintf(logfd, "(%s)", opt_comment);
 185         }
 186         fprintf(logfd, "\n");
 187
 188         if (useconds/SEC_TO_USEC != opt_count_sec) {
 189                 char buf[20];
 190                 usec_to_text(buf, useconds);
 191                 fprintf(logfd, "# Data gathered for %s.\n", buf);
 192         }
 193
 194         for (i = 0; i < nr_streams; i++) {
 195                 char stream_desc[200];
 196                 stream_to_text(stream_desc, sizeof(stream_desc), &streams[i], useconds);
 197                 fprintf(logfd, "# Stream %s\n", stream_desc);
 198         }
 199
 200         /* Find maximal delay */
 201         allzeros = true;
 202         for (maxi = MAX_DELAY_US/opt_granularity_usec - 1; maxi >= 0; maxi--) {
 203                 for (ac = 0; ac < AC_NUM; ac++) {
 204                         if ((delay_stats[ac][maxi].csc != 0) ||
 205                             (delay_stats[ac][maxi].cs != 0) ||
 206                             (delay_stats[ac][maxi].sc != 0))
 207                                 allzeros = false;
 208                 }
 209                 if (!allzeros) break;
 210         }
 211         maxi++;
 212         if (maxi < mini) maxi = mini;
 213
 214         /* Calculate total number of sent packets per AC */
 215         memset(send_count, 0, sizeof(send_count));
 216         for (i = 0; i < nr_streams; i++) {
 217                 ac = streams[i].ac;
 218                 send_count[ac] += streams[i].sent;
 219         }
 220
 221 #if 0
 222         /* Write pdf */
 223         for ( i = 0 ; i < maxi; i++) {
 224                 fprintf(logfd,"\n%f", i*opt_granularity_usec/1000.0);
 225                 for (ac = 0; ac < AC_NUM; ac++) {
 226                         if (sum[ac])
 227                                 val = (double)delay_stats[ac][i]*100.0 / sum[ac];
 228                         else val = -1; /* Don't display this ac */
 229                         fprintf(logfd," %lf", val);
 230                 }
 231         }
 232
 233         fprintf(logfd,"\n\n");
 234 #endif
 235
 236         fprintf(logfd,"## Format: msec csc%% cs%% sc%%\n");
 237
 238         /* Write PDF */
 239         for (ac = 0; ac < AC_NUM; ac++) {
 240                 struct delay_stat integral = {0,0,0}, last = {-1,-1,-1};
 241
 242                 fprintf(logfd,"%f %f %f %f\n", 0.0, 0.0, 0.0, 0.0);
 243
 244                 if (send_count[ac] != 0) {
 245                         i=0;
 246                         while ((delay_stats[ac][i].csc == 0) &&
 247                                (delay_stats[ac][i].cs == 0) &&
 248                                (delay_stats[ac][i].sc == 0)) i++;
 249
 250                         for (i++; i < maxi+1; i++) {
 251                                 if (memcmp(&last, &integral, sizeof(last))) {
 252                                         char buf[3][20];
 253                                         snprintf(buf[0], sizeof(buf[0]), "%f", (double)integral.csc*100.0 / send_count[ac]);
 254                                         snprintf(buf[1], sizeof(buf[1]), "%f", (double)integral.cs *100.0 / send_count[ac]);
 255                                         snprintf(buf[2], sizeof(buf[2]), "%f", (double)integral.sc *100.0 / send_count[ac]);
 256
 257                                         fprintf(logfd,"%f %s %s %s\n", i*opt_granularity_usec/1000.0,
 258                                                 integral.csc != last.csc ? buf[0] : "-",
 259                                                 integral.cs  != last.cs  ? buf[1] : "-",
 260                                                 integral.sc  != last.sc  ? buf[2] : "-"
 261                                                 );
 262                                         last = integral;
 263                                 }
 264                                 if (i>0) {
 265                                         integral.csc += delay_stats[ac][i-1].csc;
 266                                         integral.sc  += delay_stats[ac][i-1].sc;
 267                                         integral.cs  += delay_stats[ac][i-1].cs;
 268                                 }
 269                         }
 270                 }
 271                 fprintf(logfd,"\n\n");
 272         }
 273
 274         fprintf(stderr, "finished.\n");
 275         fclose(logfd);
 276
 277         exit(0);
 278 }
 279
 280 int create_ac_socket(unsigned int ac)
 281 {
 282         int sockfd;
 283         unsigned int yes=1, tos;
 284
 285
 286         if ((sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
 287         {
 288                 perror("Unable to open socket");
 289                 return -1;
 290         }
 291         if (fcntl(sockfd, F_SETFL, O_NONBLOCK) != 0) {
 292                 perror("set non-blocking socket");
 293                 return -1;
 294         }
 295         if (setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(int)) == -1) {
 296                 perror("Unable to set socket");
 297                 return -1;
 298         }
 299
 300         if (opt_send_buf_size >= 0) {
 301                 if (setsockopt(sockfd,SOL_SOCKET,SO_SNDBUF,&opt_send_buf_size,sizeof(opt_send_buf_size)) == -1) {
 302                         perror("Unable to set socket buffer size");
 303                         return -1;
 304                 }
 305         }
 306
 307
 308         //tos = ((AC_NUM - ac) *2 - 1)*32;
 309         tos = ac_to_tos[ac];
 310         if (setsockopt(sockfd, SOL_IP, IP_TOS, &tos, sizeof(tos))) {
 311                 perror("Unable to set TOS");
 312                 close(sockfd);
 313                 return -1;
 314         }
 315
 316         return sockfd;
 317 }
 318
 319 void empty_handler()
 320 {
 321 }
 322
 323 void reset_statistics()
 324 {
 325         int i;
 326         for (i = 0; i < nr_streams; i++) {
 327                 pthread_mutex_lock(&streams[i].mutex);
 328                 streams[i].sent = 0;
 329                 streams[i].really_sent = 0;
 330                 streams[i].received = 0;
 331                 pthread_mutex_unlock(&streams[i].mutex);
 332         }
 333         pthread_mutex_lock(&delay_stats_mutex);
 334         clock_gettime(CLOCK_REALTIME, &reset_timestamp);
 335         memset(delay_stats, 0, sizeof(delay_stats));
 336         pthread_mutex_unlock(&delay_stats_mutex);
 337 }
 338
 339 void* receiver(void* queue)
 340 {
 341         struct msg_t    msg;
 342         struct  sockaddr_in rem_addr;
 343         int     mlen, ret;
 344         unsigned int ac, rem_addr_length;
 345         long long int trans_time_usec, client_to_server_usec, server_to_client_usec;
 346         long long int min_trans_time;
 347         struct timespec send_timestamp, server_timestamp, recv_timestamp;
 348         fd_set fdset;
 349
 350         min_trans_time = ~0;
 351
 352         block_signals();
 353         set_rt_prio(99);
 354
 355         ac = (int)queue;
 356         rem_addr_length = sizeof(rem_addr);
 357         FD_ZERO(&fdset);
 358         while (!exit_flag) {
 359                 FD_SET(ac_sockfd[ac], &fdset);
 360                 ret = select(ac_sockfd[ac]+1, &fdset, NULL, NULL, NULL);
 361                 if (ret < 0) {
 362                         if (errno == EINTR) continue;
 363                         perror("receiver select");
 364                         goto out;
 365                 }
 366                 mlen = recvfrom(ac_sockfd[ac], &msg, sizeof(msg), 0,
 367                                 (struct sockaddr*)&rem_addr, &rem_addr_length);
 368                 if (mlen < 0) {
 369                         perror("Chyba pri prijimani pozadavku");
 370                         goto out;
 371                 }
 372                 clock_gettime(CLOCK_REALTIME,&recv_timestamp);
 373                 send_timestamp = msg.send_timestamp;
 374                 server_timestamp = msg.sendback_timestamp;
 375
 376                 /* Check whether this message was sent after reset_statistics() */
 377
 378                 if ((ret = timespec_sub_usec(&send_timestamp, &reset_timestamp)) < 0) {
 379                         continue; /* If so, don't count it */
 380                 }
 381
 382                 trans_time_usec = timespec_sub_usec(&recv_timestamp ,&send_timestamp) / 2;
 383                 client_to_server_usec = timespec_sub_usec(&server_timestamp, &send_timestamp);
 384                 server_to_client_usec = timespec_sub_usec(&recv_timestamp, &server_timestamp);
 385
 386                 pthread_mutex_lock(&delay_stats_mutex);
 387                 if (trans_time_usec < MAX_DELAY_US && trans_time_usec >= 0) {
 388                         delay_stats[ac][trans_time_usec/opt_granularity_usec].csc++;
 389                 }
 390                 if (client_to_server_usec < MAX_DELAY_US && client_to_server_usec >= 0) {
 391                         delay_stats[ac][client_to_server_usec/opt_granularity_usec].cs++;
 392                 }
 393                 if (server_to_client_usec < MAX_DELAY_US && server_to_client_usec >= 0) {
 394                         delay_stats[ac][server_to_client_usec/opt_granularity_usec].sc++;
 395                 }
 396                 pthread_mutex_unlock(&delay_stats_mutex);
 397
 398                 receivers[ac].received++;
 399
 400                 pthread_mutex_lock(&streams[msg.stream].mutex);
 401                 streams[msg.stream].received++;
 402                 pthread_mutex_unlock(&streams[msg.stream].mutex);
 403
 404                 /*if (trans_time_nsec < min_trans_time)
 405                         min_trans_time = trans_time_nsec;*/
 406                 /*printf("seqn= %lu tos= %d start= %lu(s).%lu(ns)"\
 407                          "stop= %lu(s).%lu(ns)\n trans_time = %lums\n",\
 408                          msg.seqn, msg.tos, send_timestamp.tv_sec,\
 409                          send_timestamp.tv_nsec,recv_timestamp.tv_sec,\
 410                          recv_timestamp.tv_nsec, trans_time_msec); */
 411         }
 412 out:
 413         sem_post(&sem_thread_finished);
 414         return NULL;
 415 }
 416
 417 /**
 418  * Send a packet.
 419  *
 420  * @return -1 in case of error, 1 in case of sucessfull send and 0
 421  *         when all buffers are full.
 422  */
 423 #ifndef WITH_FWP
 424 static inline int
 425 send_packet_native(struct stream* stream, union msg_buff* buff)
 426 {
 427         struct iovec  iov;
 428         struct msghdr msg;
 429
 430         iov.iov_base = buff;
 431         iov.iov_len = stream->packet_size;
 432         msg.msg_name = (void*)&stream->rem_addr;
 433         msg.msg_namelen = sizeof(stream->rem_addr);
 434         msg.msg_iov = &iov;
 435         msg.msg_iovlen = 1;
 436         msg.msg_flags = 0;
 437         msg.msg_control = &cmsg;
 438         msg.msg_controllen = cmsg_len;
 439
 440         int ret = 1;
 441
 442         while (sendmsg(ac_sockfd[stream->ac], &msg, 0) < 0) {
 443                 if (errno == EINTR) continue;
 444                 if (errno == EAGAIN) {
 445                         if (opt_wait_for_queue_is_full &&
 446                             !some_queue_is_full &&
 447                             /* We use mutex as atomic test and set */
 448                             (pthread_mutex_trylock(&queue_full_mutex) != EBUSY)) {
 449                                 some_queue_is_full = true;
 450                                 reset_statistics();
 451                         }
 452                         ret = 0;
 453                         break;
 454                 } else {
 455                         perror("Error while sending");
 456                         ret = -1;
 457                         break;
 458                 }
 459         }
 460         return ret;
 461 }
 462 #else
 463 static inline int
 464 send_packet_fwp(struct stream* stream, union msg_buff* buff)
 465 {
 466         int ret;
 467
 468         ret = fwp_send(stream->endpoint, buff, stream->packet_size, 0);
 469
 470         return ret;
 471 }
 472 #endif
 473
 474 static inline void
 475 wait_for_next_send(struct stream* stream, struct timespec *last_send_time)
 476 {
 477         struct timespec time_to_wait, current_time, period, interval;
 478         unsigned period_usec = stream->period_usec;
 479
 480         /*           |~~~+~~~| jitter interval (width = 2*stream->jitter percentage from period)*/
 481         /* |-------------|     nominal period*/
 482         if (stream->jitter) {
 483                 period.tv_nsec = USEC_TO_NSEC*(period_usec*(100-stream->jitter)/100
 484                                                + rand() % (2*period_usec*stream->jitter/100));
 485         } else {
 486                 period.tv_nsec = USEC_TO_NSEC*(period_usec);
 487         }
 488         period.tv_sec = 0;
 489
 490         timespec_add(&time_to_wait, last_send_time, &period);
 491         clock_gettime(CLOCK_REALTIME,&current_time);
 492         timespec_sub(&interval,&time_to_wait,&current_time);
 493         nanosleep(&interval,NULL);
 494 }
 495
 496
 497 void* sender(void* arg)
 498 {
 499         union msg_buff buff;
 500         unsigned long int seqn;
 501         struct stream* stream = (struct stream*) arg;
 502         char stream_desc[100];
 503         int ret;
 504
 505         stream_to_text(stream_desc, sizeof(stream_desc), stream, 0);
 506         printf("%s\n", stream_desc);
 507
 508         if (stream->bandwidth_bps == 0)
 509                 goto out;
 510
 511         seqn = 0;
 512
 513         block_signals();
 514         set_rt_prio(90-stream->ac);
 515
 516         while (!exit_flag) {
 517
 518 /*              buff.msg.seqn = seqn++; */
 519 /*              buff.msg.tos = ac_to_tos[stream->ac]; */
 520                 buff.msg.stream = stream-streams;
 521
 522                 clock_gettime(CLOCK_REALTIME,&buff.msg.send_timestamp);
 523
 524                 ret = send_packet(stream, &buff);
 525                 if (ret < 0) {
 526                         goto out;
 527                 }
 528
 529                 pthread_mutex_lock(&stream->mutex);
 530                 stream->sent++;
 531                 if (ret > 0)
 532                         stream->really_sent++;
 533                 pthread_mutex_unlock(&stream->mutex);
 534
 535 #ifdef DEBUG
 536                 printf("%d", stream->ac);
 537                 fflush(stdout);
 538 #endif
 539
 540                 wait_for_next_send(stream, &buff.msg.send_timestamp);
 541         }
 542 out:
 543         sem_post(&sem_thread_finished);
 544         return NULL;
 545 }
 546
 547 #ifdef WITH_FWP
 548 static int negotiate_contract_for_stream_fwp(struct stream *stream)
 549 {
 550         fwp_contract_t contract;
 551         fwp_contract_d_t contract_d;
 552         fwp_vres_d_t vres2;
 553         int ret;
 554
 555         /* Contract for client->server stream */
 556         contract.budget = stream->packet_size;
 557         contract.period_usec = stream->period_usec;
 558
 559         contract_d = fwp_contract_create(&contract);
 560         ret = fwp_contract_negotiate(contract_d, &stream->vres);
 561
 562         /* Contract for server->client stream */
 563         contract.budget = stream->packet_size;
 564         contract.period_usec = stream->period_usec;
 565
 566         contract_d = fwp_contract_create(&contract);
 567         ret = fwp_contract_negotiate(contract_d, &vres2);
 568
 569         /* We don't use the vres at server, since the server doesn't
 570          * know the parameters. Instread, server uses plain
 571          * sockets. */
 572
 573         return ret;
 574 }
 575 #endif
 576
 577 #ifdef WITH_FWP
 578 static void create_stream_endpoint_fwp(struct stream *stream)
 579 {
 580 /*      fwp_endpoint_attr_t  attr; */
 581         int ret;
 582         struct hostent* ph;
 583
 584 /*      fwp_endpoint_attr_init(&attr); */
 585 /*      fwp_endpoint_attr_setreliability(&attr, FWP_EPOINT_BESTEFFORT); */
 586
 587         ph = gethostbyname(server_addr);
 588         if (ph && ph->h_addr_list[0]) {
 589                 struct in_addr *a = (struct in_addr *)(ph->h_addr_list[0]);
 590                 ret = fwp_send_endpoint_create(a->s_addr, BASE_PORT + fwp_vres_get_ac(stream->vres),
 591                                                NULL, &stream->endpoint);
 592                 /* stream->rem_addr.sin_port = htons(BASE_PORT + stream->ac); */
 593                 if (ret < 0) {
 594                         perror("fwp_send_endpoint_create");
 595                         exit(1);
 596                 }
 597                 ret = fwp_send_endpoint_bind(stream->endpoint, stream->vres);
 598                 if (ret != 0) {
 599                         perror("fwp_send_endpoint_bind");
 600                         exit(1);
 601                 }
 602
 603
 604         }
 605         else {
 606                 char str[100];
 607                 snprintf(str, sizeof(str), "gethostbyname(%s)", server_addr);
 608                 perror(str);
 609                 exit(1);
 610         }
 611
 612 }
 613 #else
 614 static void create_stream_endpoint_native(struct stream *stream)
 615 {
 616         struct hostent* ph;
 617
 618         memset(&stream->rem_addr,0, sizeof(stream->rem_addr));
 619
 620         stream->rem_addr.sin_family = AF_INET;
 621         ph = gethostbyname(server_addr);
 622         if (ph)
 623                 stream->rem_addr.sin_addr = *((struct in_addr *)ph->h_addr);
 624         else {
 625                 char str[100];
 626                 snprintf(str, sizeof(str), "gethostbyname(%s)", server_addr);
 627                 perror(str);
 628                 exit(1);
 629         }
 630         stream->rem_addr.sin_port = htons(BASE_PORT + stream->ac);
 631 }
 632 #endif
 633
 634 static inline void
 635 calc_stream_params(struct stream *stream)
 636 {
 637         int packet_size;
 638         unsigned period_usec;
 639         int bandwidth;
 640         int ret;
 641
 642         /* If some parameters are not set explicitely, use default values. */
 643         if (stream->bandwidth_bps < 0) stream->bandwidth_bps = opt_def_bandwidth * Kbit;
 644         if (stream->packet_size < 0) stream->packet_size = opt_packet_size;
 645         if (stream->period_usec < 0) stream->period_usec = opt_def_period_msec * MSEC_TO_USEC;
 646
 647         bandwidth = stream->bandwidth_bps;
 648
 649         /* Avoid arithmetic exception. Server thread will exit if
 650            stream->bandwidth_bps == 0. */
 651         if (bandwidth == 0) bandwidth = 1;
 652
 653         if (stream->packet_size) {
 654                 packet_size = stream->packet_size;
 655                 period_usec = SEC_TO_USEC*packet_size*8/bandwidth;
 656                 if (period_usec == 0) period_usec = 1;
 657         } else if (stream->period_usec) {
 658                 period_usec = stream->period_usec;
 659                 packet_size = (long long)bandwidth/8 * period_usec/SEC_TO_USEC;
 660         } else {
 661                 char buf[200];
 662                 stream_to_text(buf, sizeof(buf), stream, 0);
 663                 fprintf(stderr, "Neither packet size nor period was specified for a stream %s\n", buf);
 664                 exit(1);
 665         }
 666
 667         if (packet_size < sizeof(struct msg_t)) {
 668                 fprintf(stderr, "Packet size too small (min %d)\n", sizeof(struct msg_t));
 669                 exit(1);
 670         }
 671
 672         stream->packet_size = packet_size;
 673         stream->period_usec = period_usec;
 674         stream->jitter = opt_jitter;
 675
 676         ret = negotiate_contract_for_stream(stream);
 677         if (ret == 0) {
 678                 create_stream_endpoint(stream);
 679         } else {
 680                 char buf[200];
 681                 stream_to_text(buf, sizeof(buf), stream, 0);
 682                 fprintf(stderr, "Contract hasn't been accepted: %s\n", buf);
 683                 stream->bandwidth_bps = 0;
 684         }
 685 }
 686
 687 /**
 688  * Parse -b parameter.
 689  *
 690  * @param params String to parse
 691  *
 692  * @return NULL in case of success, pointer to a problematic character
 693  *         on error.
 694  */
 695 char* parse_bandwidths(char *params)
 696 {
 697         struct stream *sp = &streams[nr_streams];
 698
 699         while (*params && nr_streams < MAX_STREAMS) {
 700                 char *ac_ids[AC_NUM] = { [AC_VO]="VO", [AC_VI]="VI", [AC_BE]="BE", [AC_BK]="BK" };
 701                 int i;
 702                 char *next_char;
 703
 704                 if (strlen(params) < 2)
 705                         return params;
 706                 for (i=0; i<AC_NUM; i++) {
 707                         if (strncmp(params, ac_ids[i], 2) == 0) {
 708                                 sp->ac = i;
 709                                 params+=strlen(ac_ids[i]);
 710                                 break;
 711                         }
 712                 }
 713                 if (i==AC_NUM)
 714                         return params;
 715
 716                 long bw;
 717                 if (*params == ':') {
 718                         params++;
 719
 720                         bw = strtol(params, &next_char, 10);
 721                         if (next_char == params)
 722                                 return params;
 723                         params = next_char;
 724                 } else
 725                         bw = -1;
 726
 727                 sp->bandwidth_bps = bw*Kbit;
 728
 729                 long period = 0;
 730                 long packet_size = 0;
 731                 if (*params == '@') {
 732                         params++;
 733                         period = strtol(params, &next_char, 10);
 734                         if (period == 0)
 735                                 return params;
 736                         params = next_char;
 737                 }
 738                 else {
 739                         if (*params == '/') {
 740                                 params++;
 741                                 packet_size = strtol(params, &next_char, 10);
 742                                 if (packet_size == 0)
 743                                         return params;
 744                                 params = next_char;
 745                         } else {
 746                                 packet_size = -1;
 747                                 period = -1;
 748                         }
 749                 }
 750                 sp->period_usec = period*MSEC_TO_USEC;
 751                 sp->packet_size = packet_size;
 752
 753
 754
 755                 if (*params != '\0' && *params != ',')
 756                         return params;
 757                 nr_streams++;
 758                 sp++;
 759                 if (*params == ',')
 760                         params++;
 761         }
 762         return NULL;
 763 }
 764
 765 int main(int argc, char *argv[])
 766 {
 767         int ac, i, rc, seconds;
 768         pthread_attr_t attr;
 769         pthread_t thread;
 770         char opt;
 771
 772
 773         while ((opt = getopt(argc, argv, "B:b:C:c:g:I:j:o:qQ:s:T:")) != -1) {
 774                 switch (opt) {
 775                         case 'B':
 776                                 opt_def_bandwidth = atoi(optarg);
 777                                 break;
 778                         case 'b': {
 779                                 char *error;
 780                                 error = parse_bandwidths(optarg);
 781                                 if (error != NULL) {
 782                                         if (*error == '\0')
 783                                                 fprintf(stderr, "Bandwidth parse error - string to short\n");
 784                                         else
 785                                                 fprintf(stderr, "Bandwidth parse error at '%s'\n", error);
 786                                         exit(1);
 787                                 }
 788                                 break;
 789                         }
 790                         case 'C':
 791                                 opt_comment = optarg;
 792                                 break;
 793                         case 'c':
 794                                 opt_count_sec = atoi(optarg);
 795                                 break;
 796                         case 'g':
 797                                 opt_granularity_usec = atoi(optarg);
 798                                 if (opt_granularity_usec < MIN_GRANULARITY) {
 799                                         fprintf(stderr, "Granulatiry too small (min %d)!\n", MIN_GRANULARITY);
 800                                         exit(1);
 801                                 }
 802                                 break;
 803                         case 'I':
 804                                 opt_interface = optarg;
 805                                 break;
 806                         case 'j':
 807                                 #ifdef WITH_FWP
 808                                 fprintf(stderr, "-j is not allowd when compiled with FWP\n");
 809                                 exit(1);
 810                                 #else
 811                                 opt_jitter = atoi(optarg);
 812                                 #endif
 813                                 break;
 814                         case 'o':
 815                                 opt_output = optarg;
 816                                 break;
 817                         case 'Q':
 818                                 opt_send_buf_size = atoi(optarg);
 819                                 break;
 820                         case 'q':
 821                                 opt_wait_for_queue_is_full = true;
 822                                 break;
 823                         case 's':
 824                                 opt_packet_size = atoi(optarg);
 825                                 break;
 826                         case 'T':
 827                                 opt_def_period_msec = atoi(optarg);
 828                                 break;
 829                         default:
 830                                 fprintf(stderr, "Usage: %s [ options ] server_addr\n\n", argv[0]);
 831                                 fprintf(stderr, "Options:\n");
 832                                 fprintf(stderr, "    -B  default bandwidth for -b option [kbit]\n");
 833                                 fprintf(stderr, "    -b  bandwidth of streams (VO|VI|BE|BK)[:<kbit>][@<msec> or /<bytes>][,...]\n");
 834                                 fprintf(stderr, "    -C  comment (added to header)\n");
 835                                 fprintf(stderr, "    -c  count (number of seconds to run)\n");
 836                                 fprintf(stderr, "    -g  histogram granularity [usec]\n");
 837                                 fprintf(stderr, "    -I  <interface> send packets from this interface");
 838                                 fprintf(stderr, "    -j  send jitter (0-100) [%%]\n");
 839                                 fprintf(stderr, "    -o  output filename (.dat will be appended)\n");
 840                                 fprintf(stderr, "    -q  gather statistics only after some queue becomes full\n");
 841                                 fprintf(stderr, "    -Q  <bytes> set size for socket send buffers\n");
 842                                 fprintf(stderr, "    -s  size of data payload in packets [bytes] (default: %d)\n", opt_packet_size);
 843                                 fprintf(stderr, "    -T  default period for -b option [msec]\n");
 844                                 exit(1);
 845                 }
 846         }
 847         if (opt_packet_size && opt_def_period_msec) {
 848                 fprintf(stderr, "Error: Nonzero -T and -s can't be used together!.\n");
 849                 exit(1);
 850         }
 851
 852         if (optind < argc) {
 853                 server_addr = argv[optind];
 854         } else {
 855                 fprintf(stderr, "Expected server address argument\n");
 856                 exit(1);
 857         }
 858
 859         if (nr_streams == 0)
 860                 parse_bandwidths("BE");
 861
 862         pthread_attr_init(&attr);
 863
 864         snprintf(logfname, sizeof(logfname), "%s.dat", opt_output);
 865
 866         if ((logfd = fopen(logfname,"w+")) == NULL) {
 867                 fprintf(stderr,"Can not open %s\n", logfname);
 868                 exit(1);
 869         }
 870         if (signal(SIGTERM, stopper) == SIG_ERR) {
 871                 perror("Error in signal registration");
 872                 exit(1);
 873         }
 874
 875         if (signal(SIGINT, stopper) == SIG_ERR) {
 876                 perror("Signal handler registration error");
 877                 exit(1);
 878         }
 879
 880         struct sigaction sa;
 881         sa.sa_handler = empty_handler;
 882         sa.sa_flags = 0;        /* don't restart syscalls */
 883
 884         if (sigaction(SIGUSR1, &sa, NULL) < 0) {
 885                 perror("sigaction error");
 886                 exit(1);
 887         }
 888
 889         sem_init(&sem_thread_finished, 0, 0);
 890
 891         reset_statistics();
 892
 893 #ifdef WITH_FWP
 894         rc = fwp_init();
 895         if (rc != 0) {
 896                 fprintf(stderr, "FWP initialization failed\n");
 897                 exit(1);
 898         }
 899 #endif
 900
 901         /* create four receivers each per AC */
 902         for (ac = AC_NUM - 1; ac >= 0; ac--) {
 903                 ac_sockfd[ac] = create_ac_socket(ac);
 904                 if (ac_sockfd[ac] < 0) {
 905                         return 1;
 906                 }
 907                 rc = pthread_create(&receivers[ac].thread, &attr, receiver, (void*) ac);
 908                 if (rc) {
 909                         fprintf(stderr, "Error while creating receiver %d\n",rc);
 910                         return 1;
 911                 }
 912         }
 913
 914         if (opt_interface) {
 915                 struct ifreq ifr;
 916
 917                 memset(&ifr, 0, sizeof(ifr));
 918                 strncpy(ifr.ifr_name, opt_interface, IFNAMSIZ-1);
 919                 if (ioctl(ac_sockfd[AC_VO], SIOCGIFINDEX, &ifr) < 0) {
 920                         fprintf(stderr, "unknown iface %s\n", opt_interface);
 921                         exit(1);
 922                 }
 923                 cmsg.ipi.ipi_ifindex = ifr.ifr_ifindex;
 924                 cmsg_len = sizeof(cmsg);
 925         }
 926         /* create sendpoints */
 927         for (i = 0; i < nr_streams; i++) {
 928                 struct stream *s = &streams[i];
 929                 pthread_mutex_init(&s->mutex, NULL);
 930                 calc_stream_params(s);
 931                 rc = pthread_create(&thread, &attr, sender, (void*) s);
 932                 if (rc) {
 933                         fprintf(stderr, "Error while creating sender %d\n",rc);
 934                         return 1;
 935                 }
 936         }
 937
 938         seconds = 0;
 939         while (!exit_flag) {
 940                 sleep(1);
 941                 seconds++;
 942                 fprintf(stderr, "\r%3ds", seconds);
 943                 for (ac = 0; ac < AC_NUM; ac++) {
 944                         int delta = receivers[ac].received - receivers[ac].last_received;
 945                         receivers[ac].last_received = receivers[ac].received;
 946                         fprintf(stderr, " %s %5d %4d/s", ac_to_text[ac], receivers[ac].received, delta);
 947                 }
 948                 fflush(stderr);
 949                 if (seconds == opt_count_sec)
 950                         stopper();
 951         }
 952
 953         fprintf(stderr, "\nWaiting for threads to finish\n");
 954         /* Wait for all threads to finish */
 955         for (i=0; i < nr_streams + AC_NUM; i++) {
 956                 sem_wait(&sem_thread_finished);
 957         }
 958         struct timespec end_timestamp, measure_length;
 959         clock_gettime(CLOCK_REALTIME,&end_timestamp);
 960         timespec_sub(&measure_length, &end_timestamp, &reset_timestamp);
 961
 962         save_results(argc, argv, timespec2usec(&measure_length));
 963
 964         return 0;
 965 }