zeromq_srv_single.cpp

#include "zmq.h"
#include <time.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <math.h>
#include <pthread.h>
#include <sys/wait.h>

#define SOCKET_STRING                 "tcp://127.0.0.1:1102"
#define PACKET_SIZE                   1024
#define OUTPUT_BUFFER_SIZE            PACKET_SIZE*5
#define MAX_CLIENTS                   10
#define TEST_DURATION                 10

struct ThreadStats
{
  unsigned long long packets_received;
  unsigned long long bytes_received;
};

bool flag_kill;
void *z_ctx;

//---------------------------------------------------------------------------
static void *client_thread(void *)
{
  void *sock = zmq_socket(z_ctx, ZMQ_DEALER);
  if (!sock)
    return NULL;

  if (zmq_connect(sock, SOCKET_STRING) < 0)
  {
    zmq_close(sock);
    return NULL;
  }

  char output_buffer[OUTPUT_BUFFER_SIZE];
  int output_buffer_len = 0;

  // отправляем на сервер несколько пакетов
  while (output_buffer_len+PACKET_SIZE <= sizeof(output_buffer))
  {
    int bytes_sent = zmq_send(sock, output_buffer+output_buffer_len, PACKET_SIZE, ZMQ_DONTWAIT);
    output_buffer_len += bytes_sent;
  }

  ThreadStats *stats = new ThreadStats;
  stats->packets_received = 0;
  stats->bytes_received = 0;

  // начинаем мониторить события сокета
  zmq_pollitem_t poll_fd;
  poll_fd.socket = sock;
  poll_fd.events = ZMQ_POLLIN;
  poll_fd.revents = 0;

  while(!flag_kill)
  {
    int res = zmq_poll(&poll_fd, 1, 500);
    if (res < 0)
      break;
    if (res == 0)
      continue;

    // есть новый пакет
    if (poll_fd.revents & ZMQ_POLLIN)
    {
      poll_fd.revents &= ~ZMQ_POLLIN;

      // читаем пакет с данными
      zmq_msg_t rcv_msg;
      if (zmq_msg_init(&rcv_msg) < 0)
      {
        flag_kill = true;
        break;
      }

      int rc = zmq_msg_recv(&rcv_msg, sock, ZMQ_DONTWAIT);
      if (rc < 0)
      {
        flag_kill = true;
        break;
      }

      int msg_size = zmq_msg_size(&rcv_msg);
      char *msg_buffer = (char *)zmq_msg_data(&rcv_msg);
      stats->bytes_received += msg_size;
      stats->packets_received++;

      // отправляем пакет с данными
      if (zmq_send(sock, msg_buffer, msg_size, ZMQ_DONTWAIT) < 0)
      {
        printf("zmq_send() error: %s\r\n", zmq_strerror(errno));
        break;
      }

      zmq_msg_close(&rcv_msg);
    }
  }

  zmq_close(sock);
  return stats;
}

//---------------------------------------------------------------------------
void termination_handler(int)
{
  flag_kill = true;
}
//---------------------------------------------------------------------------
int main(int argc, char *argv[])
{
  signal(SIGTERM, termination_handler);
  signal(SIGSTOP, termination_handler);
  signal(SIGINT,  termination_handler);
  signal(SIGQUIT, termination_handler);

  z_ctx = zmq_ctx_new();
  if (!z_ctx)
    return 1;

//  zmq_ctx_set(z_ctx, ZMQ_IO_THREADS, 2);

  void *sock_srv = zmq_socket(z_ctx, ZMQ_ROUTER);
  if (!sock_srv)
  {
    zmq_ctx_destroy(z_ctx);
    return 2;
  }

  if (zmq_bind(sock_srv, SOCKET_STRING) < 0)
  {
    zmq_close(sock_srv);
    zmq_ctx_destroy(z_ctx);
    return 3;
  }

  // запускаем потоки клиентов
  pthread_t thread_ids[MAX_CLIENTS];
  for (int i=0; i < MAX_CLIENTS; i++)
  {
    pthread_create(&thread_ids[i], NULL, &client_thread, NULL);
  }

  // начинаем мониторить события сокета
  zmq_pollitem_t poll_fd;
  poll_fd.socket = sock_srv;
  poll_fd.events = ZMQ_POLLIN;
  poll_fd.revents = 0;

  struct timespec ts_start;
  struct timespec ts_current;
  clock_gettime(CLOCK_MONOTONIC, &ts_start);
  double start_time = ts_start.tv_sec + (double)ts_start.tv_nsec/1000000000;
  double cur_time = ts_start.tv_sec + (double)ts_start.tv_nsec/1000000000;
  zmq_msg_t rcv_msg;
  while(!flag_kill)
  {
    clock_gettime(CLOCK_MONOTONIC, &ts_current);
    cur_time = ts_current.tv_sec + (double)ts_current.tv_nsec/1000000000;
    if (cur_time-start_time > TEST_DURATION)
    {
      flag_kill = true;
      break;
    }
    int res = zmq_poll(&poll_fd, 1, 500);
    if (res < 0)
      break;
    if (res == 0)
      continue;

    // есть новый пакет
    if (poll_fd.revents & ZMQ_POLLIN)
    {
      poll_fd.revents &= ~ZMQ_POLLIN;

      // читаем фрейм с идентификатором клиента
      char client_identity[255];
      int client_identity_len;
      client_identity_len = zmq_recv(sock_srv, client_identity, sizeof(client_identity), ZMQ_DONTWAIT);
      if (client_identity_len <= 0)
        break;

      // читаем фрейм с пакетом данных
      if (zmq_msg_init(&rcv_msg) < 0)
      {
        flag_kill = true;
        break;
      }
      int rc = zmq_msg_recv(&rcv_msg, sock_srv, ZMQ_DONTWAIT);
      if (rc < 0)
      {
        flag_kill = true;
        break;
      }
      int msg_size = zmq_msg_size(&rcv_msg);

      // отправляем фрейм с идентификатором клиента
      if (zmq_send(sock_srv, client_identity, client_identity_len, ZMQ_DONTWAIT | ZMQ_SNDMORE) < 0)
        break;

      // отправляем фрейм с пакетом данных
      if (zmq_send(sock_srv, zmq_msg_data(&rcv_msg), msg_size, ZMQ_DONTWAIT) < 0)
        break;

      zmq_msg_close(&rcv_msg);
    }
  }
  double elapsed = cur_time-start_time;

  // ждем завершения потоков
  usleep(10000);

  unsigned long long total_packets_received = 0;
  unsigned long long total_bytes_received = 0;
  // получаем статистику по потокам и считаем итог
  printf("thread id:\tbytes rcv\tpackets rcv\r\n");
  for (int i=0; i < MAX_CLIENTS; i++)
  {
    void *res = NULL;
    pthread_join(thread_ids[i], &res);
    ThreadStats *stat = (ThreadStats *)res;
    if (stat)
    {
      printf("thread %02d:\t%lld\t%lld\r\n", i+1, stat->bytes_received, stat->packets_received);
      total_bytes_received += stat->bytes_received;
      total_packets_received += stat->packets_received;
      delete stat;
    }
  }
  printf("    TOTAL:\t%lld\t%lld\r\n", total_bytes_received, total_packets_received);
  printf("\r\n");
  printf("Elapsed time: %.3lf\r\n", elapsed);
  printf("Avg speed: %d bytes/s, %d packets/s\r\n", (unsigned int)(total_bytes_received/elapsed), (unsigned int)(total_packets_received/elapsed));

  zmq_close(sock_srv);
  zmq_ctx_destroy(z_ctx);
  return 0;
}