Primer_Socket.c

/*
struct sockaddr_ll {
   unsigned short sll_family;   /* Always AF_PACKET */
   //unsigned short sll_protocol; /* Physical layer protocol */
   //int            sll_ifindex;  /* Interface number */
   //unsigned short sll_hatype;   /* ARP hardware type */
   //unsigned char  sll_pkttype;  /* Packet type */
   //unsigned char  sll_halen;    /* Length of address */
   //unsigned char  sll_addr[8];  /* Physical layer address */
//}; */ 



/*
#include <sys/types.h> 
#include <sys/socket.h>

int socket(int domain, int type, int protocol);
*/
/*
		LO IMPORTANTE Y QUE LEIMOS
				SOCK_STREAM(TCP)
	AF_INET {  						}
				SOCK_DGRAM(UDP)

				SOCK_RAW(Enlace)
	AF_PACKET{ 						}
				SOCK_DGRAM(Red)
*/

#include <sys/socket.h>
#include <linux/if_packet.h>
#include <net/ethernet.h>
#include <stdio.h>
//Para Htons
#include <arpa/inet.h>
//Para close
#include <unistd.h>

int main(){
	int packet_socket;
	packet_socket = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
	if(packet_socket == -1) perror("Error en Socket\n");
	else perror("Exito al abrirlo, paps\n");
	close(packet_socket);
}