#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>

#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>

int sw ;

void *thread_function1(void * arg)
{
    printf("exc f1 \n");

    int  sock;
    struct sockaddr_in addr;

    char buf[2048];

    sock = socket(AF_INET, SOCK_DGRAM, 0);

    addr.sin_family = AF_INET;
    addr.sin_port = htons(12345);
    addr.sin_addr.s_addr = INADDR_ANY;

    bind(sock, (struct sockaddr *)&addr, sizeof(addr));
    while(1){
        memset(buf, 0, sizeof(buf));
        recv(sock, buf, sizeof(buf), 0);

        printf("%s\n", buf);
        if(buf[0]=='q'){
            sw =0;
            break;
        }
    }
    close(sock);

    return NULL;
}

int main(void)
{
    pthread_t thread1;
    pthread_create( &thread1, NULL, thread_function1,NULL);
    sw=1;
    while( sw )
    {
        printf(".\n");
        sleep(1);
    }
    return 0;

}