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 AC_VO 0
  22 #define AC_VI 1
  23 #define AC_BE 2
  24 #define AC_BK 3
  25 */
  26
  27 #define PARAM_SERVERADDR 1
  28 #define MAX_SENDENDPOINTS  10
  29
  30 int ac_sockfd[AC_QUEUES];
  31
  32 struct receiver {
  33         pthread_t thread;
  34 } receivers[AC_QUEUES];
  35
  36 FILE* logfd;
  37 char* server_addr;
  38
  39 const char logfname[] = "delay_stats.dat";
  40
  41 struct msg_t {
  42         unsigned int tos;
  43         struct timespec send_timestamp;
  44         unsigned long int seqn;
  45         unsigned char padding[MTU];
  46 };
  47
  48 /* maximal traffic delay in ms - 10 s*/
  49 #define MAX_DELAY_US 10000000
  50 #define GRANULARITY 100
  51
  52 unsigned delay_stats[AC_QUEUES][MAX_DELAY_US/GRANULARITY];
  53
  54 /*struct ac_stats[AC_QUEUES] {
  55    unsigned long int min_trans_time;
  56    unsigned long int sum_trans_time;
  57    struct timespec   recv_timestamp;
  58    struct timespec   send_timestamp;
  59 };*/
  60
  61 struct send_endpoint {
  62         int ac;
  63         long period_nsec;
  64         int bandwidth_bps;      /* bits per second */
  65 };
  66
  67 #define MSEC (1000*1000)
  68 #define Mbit (1024*1024)
  69 #define Kbit 1024
  70
  71
  72 /*
  73 struct send_endpoint sepoint[] = {
  74         { .ac = AC_VO, .period_nsec=200*MSEC, .bandwidth_bps = 34*Kbit },
  75         { .ac = AC_VI, .period_nsec=25*MSEC, .bandwidth_bps =  480*Kbit },
  76         { .ac = AC_BE, .period_nsec=40*MSEC, .bandwidth_bps =  300*Kbit },
  77         { .ac = AC_BK, .period_nsec=40*MSEC, .bandwidth_bps =  300*Kbit },
  78 //      { .ac = AC_VI, .period_nsec=17*MSEC, .bandwidth_bps =  675*Kbit },
  79 };
  80 */
  81
  82 struct send_endpoint sepoint[] = {
  83         { .ac = AC_VO, .period_nsec=40*MSEC, .bandwidth_bps = 300*Kbit },
  84         { .ac = AC_VI, .period_nsec=40*MSEC, .bandwidth_bps =  300*Kbit },
  85         { .ac = AC_BE, .period_nsec=60*MSEC, .bandwidth_bps =  200*Kbit },
  86         { .ac = AC_BK, .period_nsec=60*MSEC, .bandwidth_bps =  200*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_QUEUES; 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_QUEUES];
 111
 112         printf("\nWriting data to log file...\n");
 113
 114         allzeros = true;
 115         for (maxi = MAX_DELAY_US/GRANULARITY - 1; maxi >= 0; maxi--) {
 116                 for (ac = 0; ac < AC_QUEUES; 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_QUEUES; 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 (ac = 0; ac < AC_QUEUES; ac++) {
 132                 for ( i = 0 ; i < maxi; i++) {
 133                         double val;
 134                         val = (double)delay_stats[ac][i]*100.0 / sum[ac];
 135                         fprintf(logfd,"%f %lf\n", i*GRANULARITY/1000.0, val);
 136                 }
 137
 138                 fprintf(logfd, "\n\n");
 139         }
 140
 141         printf("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                 /*if (trans_time_nsec < min_trans_time)
 242                         min_trans_time = trans_time_nsec;*/
 243                 /*printf("seqn= %lu tos= %d start= %lu(s).%lu(ns)"\
 244                          "stop= %lu(s).%lu(ns)\n trans_time = %lums\n",\
 245                          msg.seqn, msg.tos, send_timestamp.tv_sec,\
 246                          send_timestamp.tv_nsec,recv_timestamp.tv_sec,\
 247                          recv_timestamp.tv_nsec, trans_time_msec); */
 248         }
 249 out:
 250         sem_post(&sem_thread_finished);
 251         return NULL;
 252 }
 253
 254 void* sender(void* endpoint)
 255 {
 256         struct sockaddr_in rem_addr;
 257         struct msg_t msg;
 258         unsigned long int seqn;
 259         struct timespec time_to_wait, current_time, period, interval;
 260         struct hostent* ph;
 261         struct send_endpoint* spoint = (struct send_endpoint*) endpoint;
 262         int ac = spoint->ac;
 263
 264         memset(&rem_addr,0, sizeof(rem_addr));
 265         //-------------------------------------------------------------------
 266         // TODO: not functioning - check it
 267
 268         if ((rem_addr.sin_addr.s_addr = inet_addr(server_addr)) == INADDR_NONE){
 269            ph = gethostbyname(server_addr);
 270            if (ph)
 271                    rem_addr.sin_addr = *((struct in_addr *)ph->h_addr);
 272            else {
 273                    perror("Unknown server");
 274            }
 275         }
 276
 277         //------------------------------------------------------------------
 278
 279         rem_addr.sin_family = AF_INET;
 280         rem_addr.sin_addr.s_addr =  inet_addr(server_addr);
 281         rem_addr.sin_port = htons(BASE_PORT + ac);
 282         seqn = 0;
 283
 284         period.tv_nsec = spoint->period_nsec;
 285         period.tv_sec = 0;
 286
 287         block_signals();
 288         set_rt_prio(90-ac);
 289
 290         while (!exit_flag) {
 291
 292                 msg.seqn = seqn;
 293                 msg.tos = ac_to_tos[ac];
 294
 295                 clock_gettime(CLOCK_MONOTONIC,&msg.send_timestamp);
 296
 297                 while (sendto(ac_sockfd[ac], &msg, sizeof(msg), 0,\
 298                                 (struct sockaddr*)&rem_addr, sizeof(rem_addr)) < 0) {
 299                                 if (errno == EINTR) continue;
 300                                 perror("Error while sending");
 301                                 goto out;
 302                 }
 303
 304 #ifdef DEBUG
 305                 printf("%d", ac);
 306                 fflush(stdout);
 307 #endif
 308                 seqn++;
 309
 310                 timespec_add(&time_to_wait,&msg.send_timestamp,&period);
 311                 clock_gettime(CLOCK_MONOTONIC,&current_time);
 312                 timespec_sub(&interval,&time_to_wait,&current_time);
 313                 nanosleep(&interval,NULL);
 314         }
 315 out:
 316         sem_post(&sem_thread_finished);
 317         return NULL;
 318 }
 319
 320 int main(int argc, char *argv[])
 321 {
 322         int ac, i, rc;
 323         pthread_attr_t attr;
 324         pthread_t thread;
 325         int use_stdin = 0;
 326         char opt;
 327
 328
 329         while ((opt = getopt(argc, argv, "hs")) != -1) {
 330                 switch (opt) {
 331                         case 's':
 332                                 use_stdin = 1;
 333                                 break;
 334                         default:
 335                                 fprintf(stderr, "Usage: %s [ options ] server_addr\n", argv[0]);
 336                                 fprintf(stderr, "options:  -s  read streams from stdin\n");
 337                                 exit(1);
 338                 }
 339         }
 340         if (optind < argc) {
 341                 server_addr = argv[optind];
 342         } else {
 343                 fprintf(stderr, "Expected server address argument\n");
 344                 exit(1);
 345         }
 346
 347
 348
 349         memset(delay_stats,0, sizeof(delay_stats));
 350         pthread_attr_init(&attr);
 351
 352         if ((logfd = fopen(logfname,"w+")) == NULL) {
 353                 fprintf(stderr,"Can not open %s\n", logfname);
 354                 exit(1);
 355         }
 356
 357
 358         if (signal(SIGTERM, stopper) == SIG_ERR) {
 359                 perror("Error in signal registration");
 360                 exit(1);
 361         }
 362
 363         if (signal(SIGINT, stopper) == SIG_ERR) {
 364                 perror("Signal handler registration error");
 365                 exit(1);
 366         }
 367
 368         struct sigaction sa;
 369         sa.sa_handler = empty_handler;
 370         sa.sa_flags = 0;        /* don't restart syscalls */
 371
 372         if (sigaction(SIGUSR1, &sa, NULL) < 0) {
 373                 perror("sigaction error");
 374                 exit(1);
 375         }
 376
 377         sem_init(&sem_thread_finished, 0, 0);
 378
 379         /* create four receivers each per AC */
 380         for (ac = AC_QUEUES - 1; ac >= 0; ac--) {
 381                 ac_sockfd[ac] = create_ac_socket(ac);
 382                 rc = pthread_create(&receivers[ac].thread, &attr, receiver, (void*) ac);
 383                 if (rc) {
 384                         printf("Error while creating receiver %d\n",rc);
 385                         return 1;
 386                 }
 387         }
 388
 389         /* create sendpoints */
 390         for (i = 0; i < nr_sepoints; i++) {
 391                 rc = pthread_create(&thread, &attr, sender, (void*) &sepoint[i]);
 392                 if (rc) {
 393                         printf("Error while creating sender %d\n",rc);
 394                         return 1;
 395                 }
 396         }
 397
 398         while (!exit_flag) {
 399                 sleep(100000);
 400         }
 401
 402         printf("Waiting for threads to finish\n");
 403         /* Wait for all threads to finish */
 404         for (i=0; i < nr_sepoints + AC_QUEUES; i++) {
 405                 sem_wait(&sem_thread_finished);
 406         }
 407
 408         save_results();
 409
 410         return 0;
 411 }