/**
 * 适应于注册
 */
#include "dgram_mod_socket.h"
#include "shm_mm_wraper.h"
#include "usg_common.h"

void server(int port) {
  void *socket = dgram_mod_open_socket();
  dgram_mod_bind(socket, port);
  int size;
  void *recvbuf;
  char sendbuf[512];
  int rv;
  int remote_port;
  while ( (rv = dgram_mod_recvfrom(socket, &recvbuf, &size, &remote_port) ) == 0) {
    printf( "server: RECEIVED REQUEST FROM PORT %d NAME %s\n", remote_port, recvbuf);
    sprintf(sendbuf, "RECEIVED  PORT %d NAME %s", remote_port, recvbuf);
    dgram_mod_sendto(socket, sendbuf, strlen(sendbuf) + 1, remote_port);
    free(recvbuf);
  }
  dgram_mod_close_socket(socket);
}

void client(int port, char *sendbuf) {
  void *socket = dgram_mod_open_socket();
  int size;
  void *recvbuf;
  printf("client :send request %s\n", sendbuf);
  if(dgram_mod_sendandrecv(socket, sendbuf, strlen(sendbuf) + 1, port, &recvbuf, &size) == 0) {
    printf("client :received reply => %s\n", (char *)recvbuf);
    free(recvbuf);
  }
 
  dgram_mod_close_socket(socket);
}

 
void usage() {
   fprintf(stderr, "Usage: reqrep %s|%s <PORT> <NAME>\n", "server", "client");
}

int main(int argc, char *argv[]) {
  shm_mm_wrapper_init(512);
  int port;
  if (argc < 3) {
    usage();
    return 1;
  }

  port = atoi(argv[2]);

  if (strcmp("server", argv[1]) == 0) {
    server(port);
  } else if (strcmp("client", argv[1]) == 0) {
    if (argc < 4) {
      usage();
      return 1;
    }
    client(port, argv[3]);
  }

  
  return 0;
}