/* stack.c */

/* This the heart of network stack
 */

#include <stdio.h>

#include <drivers/module.h>
#include <drivers/KernelExport.h>

#include "net_stack.h"
#include "memory_pool.h"

#include "datalink.h"
#include "buffer.h"
#include "timer.h"

/* Defines we need */
#define NETWORK_INTERFACES	"network/interfaces"
#define NETWORK_PROTOCOLS	"network/protocols"
#define PPP_DEVICES "ppp/devices"

struct memory_pool_module_info *g_memory_pool = NULL;
static bool g_started = false;

status_t 		std_ops(int32 op, ...);

static status_t start(void);
static status_t stop(void);


static status_t start(void)
{
	if (g_started)
		return B_OK;

	puts("stack: starting...");

	start_buffers_service();
	start_timers_service();

	start_datalink_layer();

	puts("stack: started.");
	g_started = true;

	return B_OK;
}

static status_t stop(void)
{
	puts("stack: stopping...");

	stop_datalink_layer();

	stop_timers_service();
	stop_buffers_service();


	puts("stack: stopped.");
	g_started = false;
			
	return 0;
}

// #pragma mark -

struct net_stack_module_info nsmi = {
	{
		NET_STACK_MODULE_NAME,
		0, // B_KEEP_LOADED,
		std_ops
	},

	start,
	stop,
	
	// Data-Link layer
	register_interface,
	unregister_interface,
	
	// net_buffer support
	new_buffer,
	delete_buffer,
	duplicate_buffer,
	clone_buffer,
	split_buffer,
	
	add_to_buffer,
	remove_from_buffer,

	attach_buffer_free_element,
	
	read_buffer,
	write_buffer,

	dump_buffer,
	
	// net_buffer_queue support
	new_buffer_queue,
	delete_buffer_queue,
	empty_buffer_queue,
	enqueue_buffer,
	dequeue_buffer,
	
	// Timers support
	new_net_timer,
	delete_net_timer,
	start_net_timer,
	cancel_net_timer,
	net_timer_appointment
};

status_t std_ops(int32 op, ...) 
{
	status_t	status;

	switch(op) {
		case B_MODULE_INIT:
			printf("stack: B_MODULE_INIT\n");
			load_driver_symbols("stack");
			status = get_module(MEMORY_POOL_MODULE_NAME, (module_info **) &g_memory_pool);
			if (status != B_OK)
				return status;
				
			// Re-publish memory_pool module api thru our
			nsmi.new_pool 			= g_memory_pool->new_pool;
			nsmi.delete_pool 		= g_memory_pool->delete_pool;
			nsmi.new_pool_node		= g_memory_pool->new_pool_node;
			nsmi.delete_pool_node	= g_memory_pool->delete_pool_node;
			nsmi.for_each_pool_node	= g_memory_pool->for_each_pool_node;
			break;

		case B_MODULE_UNINIT:
			// the stack is keeping loaded, so don't stop it
			printf("stack: B_MODULE_UNINIT\n");
			put_module(MEMORY_POOL_MODULE_NAME);
			break;

		default:
			return B_ERROR;
	}
	return B_OK;
}

_EXPORT module_info *modules[] = {
	(module_info *) &nsmi, 	// net_stack_module_info
	NULL
};