#include <linux/add_gateway_node.h>
#include <linux/string.h>
#include <linux/gateway_list.h>

extern int AT_ROUTING;
struct gateway_list_head *glh;/*to be exported*/
struct gateway_list_head *rlh;/*to be exported, route list head*/
uint32_t at_state;
uint32_t at_mycid;

asmlinkage int sys_add_routable_node(uint32_t gw, int action)
{
	struct gateway_list_node gln;	

	gln.gw = gw; /*copy the gateway node*/
	if(AT_ROUTING == 0)/*No alpha-t routing*/	
	{
		return -EUNATCH;/*protocol driver not attached*/ 
	}
	else
	{
		switch(action)
		{
			case 0: /*delete gateway node*/
				remove_from_list(&glh, &gln);	
				break;
			case 1: /*add gateway node*/
				add_to_list(&glh, &gln);	
				break;	
			case 2: /*change state*/
				if(gw > 4)
					return -EINVAL;	
				else
					at_state = gw;	
				break;	
			case 3: /*delete reachable node, note rlh below*/
				remove_from_list(&rlh, &gln);	
				break; 
			case 4: /*add reachable node, note rlh below*/	
				add_to_list(&rlh, &gln);	
				break;
			case 5: /*return current state, no error check TODO*/
				return at_state; /*AT STATE BEING RETURNED*/
				break;	
			case 6:/*set your cid*/	
				at_mycid = gw;	
				break;
			case 7:/*get back your cid*/
				return at_mycid;
				break;	
			default:
				return -EINVAL;	
		}	
		return 0; /*success*/
	}
}

/*
int populate_proc_routable(char *page, char **start, off_t offset, int count,
				int *eof, void *data)
{
	struct printable_buffer pbf;	
	pbf.offset = 0;
	pbf.buff = page;
	*eof = 1;
	return apply_function_to_list(&rlh, fill_proc_buffer,&pbf);
}
*/

int populate_proc_routable(char *page, char **start, off_t offset, int count,
				int *eof, void *data)
{
	struct printable_buffer pbf;	
	pbf.offset = 0;
	pbf.buff = page;
	pbf.buff[0] = '\0';
	*eof = 1;

	apply_function_to_list(&rlh, fill_gateway_buffer, &pbf);

	return strlen(pbf.buff);
}

int populate_proc_gateways(char *page, char **start, off_t offset, int count,
				int *eof, void *data)
{
	struct printable_buffer pbf;	
	pbf.offset = 0;
	pbf.buff = page;
	pbf.buff[0] = '\0';
	*eof = 1;

	apply_function_to_list(&glh, fill_gateway_buffer, &pbf);

	return strlen(pbf.buff);
}

int populate_proc_state(char *page, char **start, off_t offset, int count,
				int *eof, void *data)
{
	*eof = 1;	
	sprintf(page, "%d\n", at_state);	
	return strlen(page);
}

int populate_proc_cid(char *page, char **start, off_t offset, int count,
				int *eof, void *data)
{
	*eof = 1;	
	sprintf(page, "%d.%d.%d.%d\n", NIPQUAD(at_mycid));	
	return strlen(page);
}