client.c

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
#define PORT_ID 10001
#define SERV_HOST_ADDR "127.0.0.1"


int main(void)
{
    int sockid, status,nread;
     struct sockaddr_in ssock_addr;
    int sizeof_addr = sizeof(ssock_addr);

    char msg[1024];
    time_t start,end;



    bzero((char *)&ssock_addr, sizeof_addr);
    ssock_addr.sin_family = AF_INET;
    ssock_addr.sin_addr.s_addr = inet_addr(SERV_HOST_ADDR);
    ssock_addr.sin_port = htons(PORT_ID);

    if ((sockid = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
    {
        printf("Eroare socket\n");
        return -1;
    }


    while(1)
    {
        fgets(msg, sizeof(msg), stdin);
        start = time(NULL);
        status= sendto(sockid, &msg, sizeof(msg),0, (struct sockaddr *) &ssock_addr, sizeof_addr);
    if(status<0)
        {
        printf("Eroare trimitere!\n");
        }
    else{
        nread=recvfrom(sockid, &msg,sizeof(msg), 0, (struct sockaddr *) &ssock_addr,&sizeof_addr);
            if(msg[0] != '.' || msg[1] != 'd')
                {

                    if(nread < 0) printf("Eroare primire\n");
                    else
                    {
                       end = time(NULL);
                       msg[strlen(msg) - 1] = '\0';
                       printf("durata transmitere/receptie %s:  %lds\n",msg,end-start);
                    }
                }
            else
            {
                msg[nread] = '\0';
                if(strcmp(msg,"ERROR")==0)
                    printf("Eroare comanda!\n");
            }
        }
    }

    return 0;

}