rem: dprintf("%s: packet %p is an IPv4 packet!\n", me->name, buffer);
add: dump_ipv4_header(buffer);
context: static status_t process_input(net_layer *me, net_buffer *buffer){	uint16 *protocol;	if (!buffer)		return B_ERROR;	if (g_stack->find_buffer_attribute(buffer, ethernet_protocol_attr, NULL, (void **) &protocol, NULL) != B_OK)		return B_ERROR;	if (*protocol != htons(0x0800))	// IPv4 on Ethernet protocol value		return B_ERROR;	// TODO!	dprintf("%s: packet %p is an IPv4 packet!\n", me->name, buffer);	g_stack->delete_buffer(buffer, false);	return B_OK;}