[C] Programmation réseau et socket

int main()
{
	/* Variables Network */
   	struct sockaddr_in sin1;
   	struct sockaddr_in sin2;
   	struct sockaddr_in cliaddr1,cliaddr2;
   	struct sigaction sa;
   	int fd1,new_fd1;
   	int fd2,new_fd2;
   	int address_size;
   	int maxfd;
    pid_t childpid;
   	socklen_t clilen1,clilen2;
   	fd_set rset;
   	pthread_t w1;
   	pthread_t server_th;
   	pthread_t server_th2;
	
	/* Variables Video */
   	char *videodevice = "/dev/video0";
   	int format = VIDEO_PALETTE_YUV420P;
   	int width = 640;
   	int height = 480;

	/* Variables Temp */
   	char buf[16384];
   	int err,re,i,len;
	
	/* Initialisation de la video en mode mmap par defaut */
   	printf("%sVideo initialization in progress ...%s\n",ppurple,pnormal);
	memset (&videoIn, 0, sizeof (struct vdIn));
	if (init_videoIn(&videoIn, videodevice, width, height, format,1) != 0)
     		printf ("%sInitialisation error !%s\n",pred,pnormal);
	printf("%sVideo initialization correctly done !%s\n",ppurple,pnormal);
    
  	/* Creation du thread pour le Grab */
	if((err= pthread_create (&w1, NULL, (void *) grab, NULL)) != 0)
	{
		printf("%sGrab creation thread error %d %s\n",pred,err,pnormal);
		close_v4l (&videoIn);
		exit(1);
 	}

	/* Socket UDP */
  	if((fd1=socket(AF_INET,SOCK_DGRAM,0))==-1)
    		erreur("socket");
 
	/* Socket TCP */
   	if((fd2=socket(AF_INET,SOCK_STREAM,0))==-1)
     		erreur("socket");
		
   	bzero(&sin1,sizeof(sin1));
   	sin1.sin_family=AF_INET;
   	sin1.sin_addr.s_addr=INADDR_ANY;
   	sin1.sin_port=htons(port1);

   	bzero(&sin2,sizeof(sin2));
   	sin2.sin_family=AF_INET;
   	sin2.sin_addr.s_addr=INADDR_ANY;
   	sin2.sin_port=htons(port2);

	printf("%sBinding ...%s\n",pgreen,pnormal);
   	if(bind(fd1,(struct sockaddr*)&sin1,sizeof(sin1))==-1)
   		erreur("bind");
   	if(bind(fd2,(struct sockaddr*)&sin2,sizeof(sin2))==-1)
   		erreur("bind");
		
	printf("%sListening ...%s\n",pgreen,pnormal);
   	if(listen(fd2,20)==-1)
  		erreur("listen");
 
   	/* Ignore sigpipe */
    	signal(SIGPIPE, SIG_IGN);	

    	sa.sa_handler = sigchld_handler;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = SA_RESTART;

    	printf("%sWaiting for connection ...%s\n",pblue,pnormal);
    
    	signal(SIGCHLD,sig_handle);
    	FD_ZERO(&rset);
         
	/* Beginning Client Loop */                                                                        
    	for(;;)
    	{
      		FD_SET(fd1,&rset);
     		FD_SET(fd2,&rset);
      		maxfd=max(fd1,fd2)+1;
      		if (select(maxfd,&rset,NULL,NULL,NULL)<0)
      		{
        		if(errno==EINTR)
         			continue;
        		else
        		{
         			printf("Select error : %s\n",strerror(errno));
         			exit(1);
        		}
		}
		/* Socket UDP */
     		if(FD_ISSET(fd1,&rset))
      		{
       			//printf("%s[%sUDP%s] Connection acquired from (%s%s%s)%s\n",pblue,pred,pblue,ppurple,inet_ntoa(cliaddr1.sin_addr),pblue,pnormal);
			pthread_create(&server_th2, NULL, (void *)service_udp, &fd1);
     		}
   
   		/* Socket TCP */
      		if(FD_ISSET(fd2,&rset))
      		{
       			clilen2=sizeof(cliaddr2);
       			if((new_fd2=accept(fd2,(struct sockaddr*)&cliaddr2,&clilen2))<0)
       			{
         			if(errno==EINTR)
          			continue;
          			else
          			{
           				printf("accept error \n");
           				exit(1);
          			}
       			}
			printf("%s[%sTCP%s] Connection acquired from (%s%s%s)%s\n",pblue,pred,pblue,ppurple,inet_ntoa(cliaddr2.sin_addr),pblue,pnormal);
	
			/* Creation d'un thread par client */
         		pthread_create(&server_th, NULL, (void *)service, &new_fd2);
		}
     	} /* Fin du For */
	
	/* En attente de l'arret du thread Grab */
      	pthread_join (w1, NULL);
	
	/* Fermeture programme */
      	close(fd1);
      	close(fd2);
      	close_v4l (&videoIn);
      	exit(0);
}