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