wme_test/wclient.c

   1 #include <errno.h>
   2 #include <sys/types.h>
   3 #include <sys/socket.h>
   4 #include <netinet/in.h>
   5 #include <arpa/inet.h>
   6 #include <netdb.h>
   7 #include <signal.h>
   8 #include <sys/wait.h>
   9 #include <stdio.h>
  10 #include <unistd.h>
  11 #include <fcntl.h>
  12 #include <time.h>
  13 #include <string.h>
  14 #include <pthread.h>
  15 #include <string.h>
  16 #include <stdlib.h>
  17 #include <stdbool.h>
  18 #include "common.h"
  19 #include <semaphore.h>
  20
  21 #define MSEC (1000)
  22
  23 #define PARAM_SERVERADDR 1
  24 #define MAX_SENDENDPOINTS  10
  25
  26 unsigned opt_packet_size = 800;
  27 unsigned opt_period_usec = 10*MSEC;
  28 unsigned opt_jitter = 0;
  29 char    *opt_output = "delay_stats";
  30 unsigned opt_count_sec = 0;
  31
  32 int ac_sockfd[AC_QUEUES];
  33
  34 struct receiver {
  35         pthread_t thread;
  36         unsigned received, last_received;
  37 } receivers[AC_QUEUES];
  38
  39 FILE* logfd;
  40 char* server_addr;
  41 char logfname[100];
  42
  43 struct msg_t {
  44         unsigned int tos;
  45         struct timespec send_timestamp;
  46         unsigned long int seqn;
  47 };
  48
  49 union msg_buff {
  50         struct msg_t msg;
  51         char nonsense[BUFFSIZE];
  52 };
  53
  54 /* maximal traffic delay in ms - 10 s*/
  55 #define MAX_DELAY_US 10000000
  56 #define GRANULARITY 100
  57
  58 unsigned delay_stats[AC_QUEUES][MAX_DELAY_US/GRANULARITY];
  59
  60 /*struct ac_stats[AC_QUEUES] {
  61    unsigned long int min_trans_time;
  62    unsigned long int sum_trans_time;
  63    struct timespec   recv_timestamp;
  64    struct timespec   send_timestamp;
  65 };*/
  66
  67 struct send_endpoint {
  68         int ac;
  69         long period_usec;       /* all time units are in microseconds */
  70         int bandwidth_bps;      /* bits per second */
  71 };
  72
  73 /*
  74 struct send_endpoint sepoint[] = {
  75         { .ac = AC_VO, .period_usec=200*MSEC, .bandwidth_bps = 34*Kbit },
  76         { .ac = AC_VI, .period_usec=25*MSEC, .bandwidth_bps =  480*Kbit },
  77         { .ac = AC_BE, .period_usec=40*MSEC, .bandwidth_bps =  300*Kbit },
  78         { .ac = AC_BK, .period_usec=40*MSEC, .bandwidth_bps =  300*Kbit },
  79 //      { .ac = AC_VI, .period_usec=17*MSEC, .bandwidth_bps =  675*Kbit },
  80 };
  81 */
  82
  83 struct send_endpoint sepoint[] = {
  84         { .ac = AC_VO, .period_usec=10*MSEC, .bandwidth_bps =  300*Kbit },
  85         { .ac = AC_VI, .period_usec=10*MSEC, .bandwidth_bps =  300*Kbit },
  86         { .ac = AC_BE, .period_usec=10*MSEC, .bandwidth_bps =  300*Kbit },
  87         { .ac = AC_BK, .period_usec=10*MSEC, .bandwidth_bps =  300*Kbit },
  88 };
  89
  90 unsigned int nr_sepoints = sizeof(sepoint)/sizeof(*sepoint);
  91
  92 sem_t sem_thread_finished;
  93
  94 bool exit_flag = false;
  95
  96 void stopper()
  97 {
  98         int i;
  99         exit_flag = true;
 100
 101         /* Interrupt all receivers */
 102         for (i=0; i<AC_QUEUES; i++) {
 103                 pthread_kill(receivers[i].thread, SIGUSR1);
 104         }
 105 }
 106
 107 void save_results()
 108 {
 109         int ac, i, maxi;
 110         bool allzeros;
 111         unsigned sum[AC_QUEUES];
 112
 113         fprintf(stderr, "\nWriting data to %s...\n", logfname);
 114
 115         allzeros = true;
 116         for (maxi = MAX_DELAY_US/GRANULARITY - 1; maxi >= 0; maxi--) {
 117                 for (ac = 0; ac < AC_QUEUES; ac++) {
 118                         if (delay_stats[ac][maxi] != 0) allzeros = false;
 119                 }
 120                 if (!allzeros) break;
 121         }
 122         if (maxi < 3000/GRANULARITY) maxi = 3000/GRANULARITY;
 123
 124         for (ac = 0; ac < AC_QUEUES; ac++) {
 125                 sum[ac] = 0;
 126                 for ( i = 0 ; i < maxi; i++)
 127                         sum[ac]+=delay_stats[ac][i];
 128                 if (sum[ac] == 0)
 129                         fprintf(stderr, "No response in AC %d\n", ac);
 130         }
 131
 132         for ( i = 0 ; i < maxi; i++) {
 133                 fprintf(logfd,"\n%f", i*GRANULARITY/1000.0);
 134                 for (ac = 0; ac < AC_QUEUES; ac++) {
 135                         double val;
 136                         val = (double)delay_stats[ac][i]*100.0 / sum[ac];
 137                         fprintf(logfd," %lf", val);
 138                 }
 139         }
 140
 141         fprintf(stderr, "Finished.\n");
 142         fclose(logfd);
 143
 144         exit(0);
 145 }
 146
 147 static inline
 148 void timespec_add (struct timespec *sum, const struct timespec *left,
 149               const struct timespec *right)
 150 {
 151         sum->tv_sec = left->tv_sec + right->tv_sec;
 152         sum->tv_nsec = left->tv_nsec + right->tv_nsec;
 153
 154         if (sum->tv_nsec >= 1000000000){
 155                 ++sum->tv_sec;
 156                 sum->tv_nsec -= 1000000000;
 157         }
 158 }
 159
 160 static inline
 161 void timespec_sub (struct timespec *diff, const struct timespec *left,
 162               const struct timespec *right)
 163 {
 164         diff->tv_sec = left->tv_sec - right->tv_sec;
 165         diff->tv_nsec = left->tv_nsec - right->tv_nsec;
 166
 167         if (diff->tv_nsec < 0){
 168                   --diff->tv_sec;
 169                   diff->tv_nsec += 1000000000;
 170         }
 171 }
 172
 173 int create_ac_socket(unsigned int ac)
 174 {
 175         int sockfd;
 176         unsigned int yes=1, tos;
 177
 178
 179         if ((sockfd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
 180         {
 181                 perror("Unable to open socket");
 182                 return -1;
 183         }
 184
 185         if (setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&yes,sizeof(int)) == -1) {
 186                 perror("Unable to set socket");
 187                 return -1;
 188         }
 189
 190
 191         //tos = ((AC_QUEUES - ac) *2 - 1)*32;
 192         tos = ac_to_tos[ac];
 193         if (setsockopt(sockfd, SOL_IP, IP_TOS, &tos, sizeof(tos))) {
 194                 perror("Unable to set TOS");
 195                 close(sockfd);
 196                 return -1;
 197         }
 198
 199         return sockfd;
 200 }
 201
 202 void empty_handler()
 203 {
 204 }
 205
 206 void* receiver(void* queue)
 207 {
 208         struct msg_t    msg;
 209         struct  sockaddr_in rem_addr;
 210         int     mlen;
 211         unsigned int ac, rem_addr_length;
 212         unsigned long int trans_time_usec;
 213         unsigned long int min_trans_time;
 214         struct timespec   send_timestamp,recv_timestamp, trans_time;
 215
 216         min_trans_time = ~0;
 217
 218         block_signals();
 219         set_rt_prio(99);
 220
 221         ac = (int)queue;
 222         rem_addr_length = sizeof(rem_addr);
 223         while (!exit_flag) {
 224                 mlen = recvfrom(ac_sockfd[ac], &msg, sizeof(msg), 0,    \
 225                                 (struct sockaddr*)&rem_addr, &rem_addr_length);
 226                 if (mlen < 0) {
 227                         if (errno == EINTR) continue;
 228                         perror("Chyba pri prijimani pozadavku");
 229                         goto out;
 230                 }
 231                 clock_gettime(CLOCK_MONOTONIC,&recv_timestamp);
 232                 send_timestamp = msg.send_timestamp;
 233
 234                 timespec_sub(&trans_time,&recv_timestamp ,&send_timestamp);
 235                 trans_time_usec = (trans_time.tv_sec * 1000000 + \
 236                                          trans_time.tv_nsec / 1000) /2;
 237
 238                 if (trans_time_usec < MAX_DELAY_US)
 239                         delay_stats[ac][trans_time_usec/GRANULARITY]++;
 240
 241                 receivers[ac].received++;
 242
 243                 /*if (trans_time_nsec < min_trans_time)
 244                         min_trans_time = trans_time_nsec;*/
 245                 /*printf("seqn= %lu tos= %d start= %lu(s).%lu(ns)"\
 246                          "stop= %lu(s).%lu(ns)\n trans_time = %lums\n",\
 247                          msg.seqn, msg.tos, send_timestamp.tv_sec,\
 248                          send_timestamp.tv_nsec,recv_timestamp.tv_sec,\
 249                          recv_timestamp.tv_nsec, trans_time_msec); */
 250         }
 251 out:
 252         sem_post(&sem_thread_finished);
 253         return NULL;
 254 }
 255
 256 void* sender(void* endpoint)
 257 {
 258         struct sockaddr_in rem_addr;
 259         union msg_buff buff;
 260         unsigned long int seqn;
 261         struct timespec time_to_wait, current_time, period, interval;
 262         struct hostent* ph;
 263         struct send_endpoint* spoint = (struct send_endpoint*) endpoint;
 264         char buf1[12], buf2[12], buf3[12];
 265         int ac = spoint->ac;
 266         int packet_size;
 267         unsigned period_usec;
 268         char stream_desc[100];
 269
 270         if (opt_packet_size) {
 271                 packet_size = opt_packet_size;
 272                 period_usec = 1000000LL*packet_size*8/spoint->bandwidth_bps;
 273         } else {
 274                 period_usec = spoint->period_usec;
 275                 packet_size = (long long)spoint->bandwidth_bps/8 * period_usec/1000000;
 276         }
 277         snprintf(stream_desc, sizeof(stream_desc), "%d: %s %s (%d bytes per %s +-%s, %d packets/s)\n",
 278                  spoint-sepoint, ac_to_text[ac], bandwidth_to_text(buf1, spoint->bandwidth_bps),
 279                  packet_size, usec_to_text(buf2, period_usec),
 280                  usec_to_text(buf3, opt_jitter*period_usec/100), 1000000/period_usec);
 281         printf("%s", stream_desc);
 282         fprintf(logfd, "# Stream %s", stream_desc);
 283
 284         if (packet_size < sizeof(struct msg_t)) {
 285                 fprintf(stderr, "Pakcet size too small (min %d)\n", sizeof(struct msg_t));
 286                 exit(1);
 287         }
 288
 289
 290         memset(&rem_addr,0, sizeof(rem_addr));
 291
 292         rem_addr.sin_family = AF_INET;
 293         ph = gethostbyname(server_addr);
 294         if (ph)
 295                 rem_addr.sin_addr = *((struct in_addr *)ph->h_addr);
 296         else {
 297                 perror("Unknown server");
 298                 exit(1);
 299         }
 300         rem_addr.sin_port = htons(BASE_PORT + ac);
 301         seqn = 0;
 302
 303         block_signals();
 304         set_rt_prio(90-ac);
 305
 306         while (!exit_flag) {
 307
 308                 buff.msg.seqn = seqn;
 309                 buff.msg.tos = ac_to_tos[ac];
 310
 311                 clock_gettime(CLOCK_MONOTONIC,&buff.msg.send_timestamp);
 312
 313                 while (sendto(ac_sockfd[ac], &buff, packet_size, 0,\
 314                                 (struct sockaddr*)&rem_addr, sizeof(rem_addr)) < 0) {
 315                                 if (errno == EINTR) continue;
 316                                 perror("Error while sending");
 317                                 goto out;
 318                 }
 319
 320 #ifdef DEBUG
 321                 printf("%d", ac);
 322                 fflush(stdout);
 323 #endif
 324                 seqn++;
 325
 326                 /*           |~~~+~~~| jitter interval (width = 2*opt_jitter percentage from period)*/
 327                 /* |-------------|     nominal period*/
 328                 if (opt_jitter) {
 329                         period.tv_nsec = 1000LL*(period_usec*(100-opt_jitter)/100
 330                                                  + rand() % (2*period_usec*opt_jitter/100));
 331                 } else {
 332                         period.tv_nsec = 1000LL*(period_usec);
 333                 }
 334                 period.tv_sec = 0;
 335
 336                 timespec_add(&time_to_wait,&buff.msg.send_timestamp,&period);
 337                 clock_gettime(CLOCK_MONOTONIC,&current_time);
 338                 timespec_sub(&interval,&time_to_wait,&current_time);
 339                 nanosleep(&interval,NULL);
 340         }
 341 out:
 342         sem_post(&sem_thread_finished);
 343         return NULL;
 344 }
 345
 346 int main(int argc, char *argv[])
 347 {
 348         int ac, i, rc;
 349         pthread_attr_t attr;
 350         pthread_t thread;
 351         char opt;
 352
 353
 354         while ((opt = getopt(argc, argv, "c:j:o:s:")) != -1) {
 355                 switch (opt) {
 356                         case 'c':
 357                                 opt_count_sec = atoi(optarg);
 358                                 break;
 359                         case 'j':
 360                                 opt_jitter = atoi(optarg);
 361                                 break;
 362                         case 'o':
 363                                 opt_output = optarg;
 364                                 break;
 365                         case 's':
 366                                 opt_packet_size = atoi(optarg);
 367                                 break;
 368                         default:
 369                                 fprintf(stderr, "Usage: %s [ options ] server_addr\n\n", argv[0]);
 370                                 fprintf(stderr, "Options:\n");
 371                                 fprintf(stderr, "    -c  count (number of seconds to run)");
 372                                 fprintf(stderr, "    -j  send jitter (0-100) [%%]\n");
 373                                 fprintf(stderr, "    -o  output filename (.dat will be appended)");
 374                                 fprintf(stderr, "    -s  size of data payload in packets [bytes]\n");
 375                                 exit(1);
 376                 }
 377         }
 378         if (optind < argc) {
 379                 server_addr = argv[optind];
 380         } else {
 381                 fprintf(stderr, "Expected server address argument\n");
 382                 exit(1);
 383         }
 384
 385
 386
 387         memset(delay_stats,0, sizeof(delay_stats));
 388         pthread_attr_init(&attr);
 389
 390         snprintf(logfname, sizeof(logfname), "%s.dat", opt_output);
 391
 392         if ((logfd = fopen(logfname,"w+")) == NULL) {
 393                 fprintf(stderr,"Can not open %s\n", logfname);
 394                 exit(1);
 395         }
 396         fprintf(logfd, "# Invoked as: ");
 397         for (i=0; i<argc; i++) fprintf(logfd, "%s ", argv[i]);
 398         fprintf(logfd, "\n");
 399
 400         if (signal(SIGTERM, stopper) == SIG_ERR) {
 401                 perror("Error in signal registration");
 402                 exit(1);
 403         }
 404
 405         if (signal(SIGINT, stopper) == SIG_ERR) {
 406                 perror("Signal handler registration error");
 407                 exit(1);
 408         }
 409
 410         struct sigaction sa;
 411         sa.sa_handler = empty_handler;
 412         sa.sa_flags = 0;        /* don't restart syscalls */
 413
 414         if (sigaction(SIGUSR1, &sa, NULL) < 0) {
 415                 perror("sigaction error");
 416                 exit(1);
 417         }
 418
 419         sem_init(&sem_thread_finished, 0, 0);
 420
 421         /* create four receivers each per AC */
 422         for (ac = AC_QUEUES - 1; ac >= 0; ac--) {
 423                 ac_sockfd[ac] = create_ac_socket(ac);
 424                 rc = pthread_create(&receivers[ac].thread, &attr, receiver, (void*) ac);
 425                 if (rc) {
 426                         fprintf(stderr, "Error while creating receiver %d\n",rc);
 427                         return 1;
 428                 }
 429         }
 430
 431         /* create sendpoints */
 432         for (i = 0; i < nr_sepoints; i++) {
 433                 rc = pthread_create(&thread, &attr, sender, (void*) &sepoint[i]);
 434                 if (rc) {
 435                         fprintf(stderr, "Error while creating sender %d\n",rc);
 436                         return 1;
 437                 }
 438         }
 439
 440         i = 0;
 441         while (!exit_flag) {
 442                 fprintf(stderr, "\r");
 443                 for (ac = 0; ac<AC_QUEUES; ac++) {
 444                         int delta = receivers[ac].received - receivers[ac].last_received;
 445                         receivers[ac].last_received = receivers[ac].received;
 446                         fprintf(stderr, "%s: %5d (+%4d)  ", ac_to_text[ac], receivers[ac].received, delta);
 447                 }
 448                 fflush(stderr);
 449                 sleep(1);
 450                 i++;
 451                 if (i == opt_count_sec) exit_flag = 1;
 452         }
 453
 454         fprintf(stderr, "\nWaiting for threads to finish\n");
 455         /* Wait for all threads to finish */
 456         for (i=0; i < nr_sepoints + AC_QUEUES; i++) {
 457                 sem_wait(&sem_thread_finished);
 458         }
 459         printf("\n");
 460
 461         save_results();
 462
 463         return 0;
 464 }