server.c

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/stat.h>
#define PORT_ID 10001

int main(void)
{

    int sockid;
      struct sockaddr_in ssock_addr;
    int sizeof_addr = sizeof(ssock_addr);
    struct sockaddr_in client;
    int sizeof_client = sizeof(client);
    char mesaj[1024];
    int nread,delay = 0,status;

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

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

    if ((bind(sockid, (struct sockaddr *)&ssock_addr, sizeof_addr) < 0))
    {
        printf("Eroare de legatura\n");
        return -1;
    }
    else
        printf("Bind\n");

        while(1)
        {
        nread=recvfrom(sockid,&mesaj,sizeof(mesaj),0,(struct sockaddr *) &ssock_addr,&sizeof_addr);
        if(nread<0)
        {
            printf("Error la receptionare mesaj\n");
            return -1;
        }

        if(mesaj[0]=='.'&& mesaj[1] == 'd')
        {
            delay = 0;
            status=0;
            for(int i=3;i < strlen(mesaj) -1;i++)
            {
                if(mesaj[i] < '0'|| mesaj[i] > '9')
                    {   printf("Eroare comanda\n");
                        status = -1;
                        break;
                    }
                else
                    delay= delay*10 + mesaj[i] - '0';
            }

            if(status==0)
            {
                sendto(sockid,mesaj,sizeof(mesaj),0,(struct sockaddr *) &ssock_addr, sizeof_addr);
                printf("Delay setat la %d\n",delay);
            }
//Intarziere mai mica ca 0
            else if(status < 0)
                sendto(sockid,"ERROR",6,0,(struct sockaddr *) &ssock_addr, sizeof_addr);
        }
        else
            {
                sleep(delay);
                sendto(sockid,mesaj,sizeof(mesaj),0,(struct sockaddr *) &ssock_addr, sizeof_addr);
            }

    }
        return 0;
}