/*
    This file is part of actube.

    actube is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    libcapwap is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Foobar.  If not, see <http://www.gnu.org/licenses/>.

*/

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <stdint.h>


#include "actube.h"
#include "wtplist.h"
#include "cw/dtls.h"
#include "cw/log.h"
#include "cw/dbg.h"
#include "cw/sock.h"
#include "conf.h"

#include "socklist.h"

#include "db.h"
#include "cw/capwap_items.h"
#include "cw/capwap_cisco.h"
//#include "cw/capwap_80211.h"
#include "cw/action.h"
#include "cw/capwap_crypto.h"
#include "cw/mbag.h"


#include "ac.h"
#include "cw/format.h"


#include "dataman.h"


int ac_run();


static void *alive_thread (void *data)
{
	/* Ping the database every 5 seconds */
	while (1) {
		sleep (5);
		db_ping();
	}
}


#include <getopt.h>



struct bootcfg {
	const char * cfgfilename;
};

static int parse_args (int argc, char *argv[], struct bootcfg * bootcfg)
{
	int c;
	opterr = 1;
	
	bootcfg->cfgfilename = "config.ktv";
	
	while ( (c = getopt (argc, argv, "vc:d:p:")) != -1) {
		
		switch (c) {
			case 'c':
				bootcfg->cfgfilename = optarg;
				break;
			case 'v':
				printf("AC-Tube version 0.0.1, %s\n", SYS_ARCH);
				exit(EXIT_SUCCESS);
				break;
			case 'd':{
				int b = cw_strlist_get_id(cw_dbg_strings, optarg);
				if (b==-1){
					fprintf(stderr,"Invalid debug option: %s\n",optarg);
					exit(EXIT_FAILURE);
				}
				cw_dbg_set_level(b, 1);
				break;
			}

			case 'p':
				cw_mod_set_path(optarg);
				break;
			case '?':
				exit(EXIT_FAILURE);
			default:
			case 'h':
				printf("%s: -vcmh\n",argv[0]);
				exit(EXIT_SUCCESS);
				break;
		}
	}
	return 0;
}















#include "cw/mod.h"
extern struct cw_Mod * cw_get_mod_ac (const char *name);

#include "cw/mlist.h"


extern void test_sets();
#include "cw/file.h"
#include "cw/ktv.h"


struct mykv {
	int key;
	int value;
};

int mycmp (void *e1, void *e2)
{
	struct mykv * k1 = e1;
	struct mykv * k2 = e2;
	
//printf("My CMP: %d and %d\n", k1->key, k2->key);

	if (k1->key > k2->key)
		return 1;
		
	if (k1->key < k2->key)
		return -1;
		
	return 0;
}

void mavl_walk (struct mavlnode  * node)
{
	struct mykv * kv;
	
	if (!node) {
		printf ("\n");
		return;
	}
	
	kv = mavlnode_dataptr (node);
	printf ("KV %d\n", kv->key);
	
	printf ("go left:");
	mavl_walk (node->left);
	printf ("go right:");
	mavl_walk (node->right);
	
}

int stcmp (const void * sa1, const void *sa2)
{
	const char **s1 = sa1;
	const char **s2 = sa2;
	int rc;
	rc = strcmp (*s1, *s2);
	
	printf ("CMP %s, %s = %d\n", *s1, *s2, rc);
	return rc;
}





int main (int argc, char *argv[])
{
	int rc = 0;
	struct bootcfg bootcfg;
	FILE * file;
	mavl_t types_tree, global_cfg;
	const cw_Type_t **ti;

	/* parse arguments */
	parse_args (argc, argv, &bootcfg);

	/* open config file */
        file = fopen(bootcfg.cfgfilename,"r");
        if (file == NULL){
                cw_log(LOG_ERR,"Cant open config file '%s': %s", 
				bootcfg.cfgfilename, strerror(errno));
                exit(EXIT_FAILURE);
        }

	/* create types tree with default types */
	types_tree = cw_ktv_create_types_tree();
	for (ti=CW_KTV_STD_TYPES;*ti;ti++){
		mavl_add_ptr(types_tree,*ti);
	}
	
	global_cfg = cw_ktv_create();
	if (global_cfg == NULL){
		cw_log(LOG_ERR,"Can't create local_cfg: %s",strerror(errno));
		exit(EXIT_FAILURE);
	}

	cw_ktv_read_file(file,global_cfg,types_tree);

	fclose(file);
	
	cw_ktv_dump(global_cfg,DBG_INFO,NULL,"CFG:",NULL);
	actube_global_cfg = global_cfg;








	cw_log_name = "AC-Tube";
	
	if (!read_config ("ac.conf"))
		return 1;
		
		
	/* Show debug options if there are any set */
	if (cw_dbg_opt_level)
		cw_log (LOG_INFO, "Debug Options: %08X", cw_dbg_opt_level);
		
	/* XXX Hard coded debug settigns, set it by config in the future */
	cw_dbg_opt_display = DBG_DISP_ASC_DMP | DBG_DISP_COLORS;
	
	/* Warn, if the "secret" debugging feature for
	   developers is turned on ;) */
//	DBGX("Attention! %s", "DBG X is ON!");

//	cw_mod_set_mod_path("../../lib/actube");
	//cw_mod_load("capwap");
	
	
	
	
	
	/* Initialize the database */
	if (!db_init())
		goto errX;
		
	/* Start the database */
	if (!db_start())
		goto errX;
		
	db_ping();
	
	
	/* Start a database "pinger thread", which inserts
	   every xx seconds a timestamp into the DB */
	pthread_t alth;
	pthread_create (&alth, NULL, alive_thread, NULL);
	
	/* Init DTLS library */
	dtls_init();
	
	
	
	
	ac_global_init();
	
	if (!socklist_init())
		goto errX;
		
	if (!wtplist_init())
		goto errX;
		
	if (!dataman_list_init())
		goto errX;
		
		
	cw_log (LOG_INFO, "Starting AC-Tube, Name=%s, ID=%s", conf_acname, conf_acid);
	rc = ac_run();
errX:
	/* XXX There is more cleanup to do */
	wtplist_destroy();
	socklist_destroy();
	return rc;
}







void process_ctrl_packet (int index, struct sockaddr *addr, uint8_t * buffer, int len);

void process_cw_data_packet (int index, struct sockaddr *addr, uint8_t * buffer, int len);


int ac_run()
{

	if (!conf_listen_addrs_len) {
		cw_log (LOG_ERR, "Fatal error: No listen addresses found.");
		return 1;
	}
	
	
	
	/* it is important to create the unicast sockets first,
	 * because when we create the mcast an bcast sockets next
	 * we will look for already created sockets to find a
	 * good unicast reply socket */
	
	int i;
	
	for (i = 0; i < conf_listen_addrs_len; i++) {
		char addr[100];
		char port[50];
		int proto;
		
		conf_parse_listen_addr (conf_listen_addrs[i], addr, port, &proto);
		
		
		//struct sockaddr sa;
		
		
		socklist_add_unicast (addr, port, proto);
		
//#ifdef WITH_LWAPP
//		if (conf_lwapp)
//			socklist_add_unicast(conf_listen_addrs[i], conf_lw_control_port,
//					     AC_PROTO_LWAPP);
//#endif
	}
	
	
	
	if (socklist_len == 0) {
		cw_log (LOG_ERR, "Fatal error: Could not setup any listen socket");
		return 1;
	}
	
	/* create multicast sockets */
	for (i = 0; i < conf_mcast_groups_len; i++) {
	
		socklist_add_multicast (conf_mcast_groups[i], conf_control_port,
		                        AC_PROTO_CAPWAP);
#ifdef WITH_LWAPP
		                        
		if (conf_lwapp)
			socklist_add_multicast (conf_mcast_groups[i], conf_lw_control_port,
			                        AC_PROTO_LWAPP);
			                        
#endif
			                        
	}
	
	/* broadcast socket ipv4 only */
	for (i = 0; i < conf_bcast_addrs_len; i++) {
	
		char addr[50], port[50];
		int proto;
		conf_parse_listen_addr (conf_bcast_addrs[i], addr, port, &proto);
		
		socklist_add_broadcast (addr, port, proto);
#ifdef WITH_LWAPP
		
//              printf("Adding %d\n",socklist_len);
		if (conf_lwapp)
			socklist_add_broadcast (conf_bcast_addrs[i], conf_lw_control_port,
			                        AC_PROTO_LWAPP);
			                        
//              printf ("SI %d, PROTO: %d\n",socklist_len-1,socklist[socklist_len-1].ac_proto);
#endif
	}
	
	
	
	//get_acinfo();
	
	
	while (1) {
	
		/* prepare fdset */
		fd_set fset;
		int max = 0;
		FD_ZERO (&fset);
		
		for (i = 0; i < socklist_len; i++) {
			FD_SET (socklist[i].sockfd, &fset);
			
			if (socklist[i].sockfd > max)
				max = socklist[i].sockfd;
				
			if (socklist[i].data_sockfd) {
				FD_SET (socklist[i].data_sockfd, &fset);
				
				if (socklist[i].sockfd > max)
					max = socklist[i].sockfd;
			}
		}
		
		/* wait for an event */
		int n;
		
		while ( (n = select (max + 1, &fset, NULL, NULL, NULL)) < 0) {
			if (errno != EINTR)
				return n;
				
		}
		
		/* process the received packet */
		for (i = 0; i < socklist_len; i++) {
			uint8_t buffer[4096];
			struct sockaddr_storage srcaddr;
			socklen_t srcaddrlen;
			
			
			if (FD_ISSET (socklist[i].data_sockfd, &fset)) {
			
				int len = sock_receive (socklist[i].data_sockfd,
				                        buffer, sizeof (buffer),
				                        0,
				                        (struct sockaddr *) &srcaddr,
				                        &srcaddrlen);
				                        
				process_cw_data_packet (i, (struct sockaddr *) &srcaddr, buffer, len);
				
			}
			
			
			if (FD_ISSET (socklist[i].sockfd, &fset)) {
			
				int len = sock_receive (socklist[i].sockfd,
				                        buffer, sizeof (buffer),
				                        0,
				                        (struct sockaddr *) &srcaddr,
				                        &srcaddrlen);
				                        
				process_ctrl_packet (i, (struct sockaddr *) &srcaddr, buffer, len);
			}
			
		}
		
	}
	
	return 0;
}


void process_cw_data_packet (int index, struct sockaddr *addr, uint8_t * buffer, int len)
{
	char sock_buf[SOCK_ADDR_BUFSIZE];
	cw_dbg (DBG_X, "There is a data packet now");
	
	dataman_list_lock();
	cw_dbg (DBG_X, "Dataman list locked, now getting");
	struct dataman * dm = dataman_list_get (socklist[index].data_sockfd, addr);
	cw_dbg (DBG_X, "Dataman list locked, now gotted");
	
	cw_dbg (DBG_INFO, "Packet for dataman %s,%d", sock_addr2str_p (addr, sock_buf), socklist[index].data_sockfd);
	
	if (!dm) {
		cw_dbg (DBG_INFO, "No dataman %s,%d", sock_addr2str_p (addr, sock_buf), socklist[index].data_sockfd);
		dm = dataman_create (socklist[index].data_sockfd, addr);
		
		if (!dm) {
			cw_log (LOG_ERR, "Can't create dataman for packet from %s", sock_addr2str_p (addr, sock_buf));
			return;
		}
		
		dataman_list_add (dm);
		
		dataman_start (dm);
		
		
	}
	
	dataman_list_unlock();
	
	dataman_add_packet (dm, buffer, len);
	
	return;
	
	exit (0);
	
	
	
	
	printf ("Data packet received len = %d\n", len);
	exit (0);
	struct wtpman *wtpman = wtplist_get (addr);
	
	if (!wtpman) {
		cw_dbg (DBG_PKT_ERR, "Discarding packet on data channel from %s - No wtpman found.", sock_addr2str (addr, sock_buf));
		return;
	}
	
	
	wtpman_addpacket (wtpman, buffer, len);
}


void process_cw_ctrl_packet (int index, struct sockaddr *addr, uint8_t * buffer, int len)
{
	char sock_buf[SOCK_ADDR_BUFSIZE];
	
	/* first of all check preamble */
	int preamble = cw_get_hdr_preamble (buffer);
	
	if (preamble != CAPWAP_PACKET_PREAMBLE && preamble != CAPWAP_DTLS_PACKET_PREAMBLE) {
		cw_dbg (DBG_PKT_ERR,
		        "Discarding packet from %s, wrong preamble, preamble = 0x%01X",
		        sock_addr2str (addr, sock_buf), preamble);
		return;
	}
	
	
	wtplist_lock();
	struct wtpman *wtpman = wtplist_get (addr);
	
	if (!wtpman) {
	
		wtpman = wtpman_create (index, addr);
		
		
		if (!wtpman) {
			cw_log (LOG_ERR, "Error creating wtpman: %s", strerror (errno));
			wtplist_unlock();
			return;
		}
		
		
		if (!wtplist_add (wtpman)) {
			cw_log (LOG_ERR, "Error adding wtpman: Too many wtp connections");
			wtpman_destroy (wtpman);
			wtplist_unlock();
			return;
		};
		
		wtpman_start (wtpman, preamble & 0xf);
	}
	
	
	wtpman_addpacket (wtpman, buffer, len);
	wtplist_unlock();
}



void process_lw_ctrl_packet (int index, struct sockaddr *addr, uint8_t * buffer, int len)
{
	//int sock = socklist[index].reply_sockfd;
	
	uint8_t *m = buffer + 6;
	uint32_t val = ntohl (* ( (uint32_t *) (m)));
	
	
	printf ("VAL: %08X\n", val);
	
	
	
	/* first of all check preamble */
	int version = LWTH_GET_VERSION (m);
	
	if (version != LW_VERSION) {
//              cw_log_debug1("Discarding LWAPP packet, wrong verson");
		return;
	}
	
	int l = LWTH_GET_LENGTH (m);
	printf ("LEN = %d\n", l);
	
	if (l + 12 != len) {
		//      cw_log_debug1("Discarding LWAPP packet, wrong length");
		return;
	}
	
	wtplist_lock();
	struct wtpman *wtpman = wtplist_get (addr);
	
	if (!wtpman) {
	
		wtpman = wtpman_create (index, addr);
		
		if (!wtpman) {
			cw_log (LOG_ERR, "Error creating wtpman: %s", strerror (errno));
			wtplist_unlock();
			return;
		}
		
		
		if (!wtplist_add (wtpman)) {
			cw_log (LOG_ERR, "Error adding wtpman: Too many wtp connections");
			wtpman_destroy (wtpman);
			wtplist_unlock();
			return;
		};
		
		//wtpman_lw_start(wtpman);
	}
	
	//wtpman_lw_addpacket(wtpman,buffer,len);
	wtplist_unlock();
}





void process_ctrl_packet (int index, struct sockaddr *addr, uint8_t * buffer, int len)
{
	switch (socklist[index].ac_proto) {
		case AC_PROTO_CAPWAP:
			process_cw_ctrl_packet (index, addr, buffer, len);
			return;
			
		case AC_PROTO_LWAPP:
			process_lw_ctrl_packet (index, addr, buffer, len);
			return;
	}
}