/*
    This file is part of libcapwap.

    libcapwap 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 <openssl/err.h>

#include "conn.h"
#include "sock.h"
#include "dtls_openssl.h"
#include "cw_log.h"

extern int dtls_openssl_log_error_queue(const char *txt);


static BIO_METHOD bio_methods = {
	BIO_TYPE_DGRAM,
	"cw packet",
	dtls_openssl_bio_write,
	dtls_openssl_bio_read,
	dtls_openssl_bio_puts,
	NULL, 			// dgram_gets
	dtls_openssl_bio_ctrl,
	dtls_openssl_bio_new,
	dtls_openssl_bio_free,
	NULL,
};


/*
static unsigned int psk_server_cb(SSL *ssl,const char *identity, unsigned char * psk, unsigned int max_psk_len)
{
	BIO * b = SSL_get_rbio(ssl);
	struct conn * conn = b->ptr;
	int l = conn->dtls_psk_len < max_psk_len ? conn->dtls_psk_len : max_psk_len;
	memcpy(psk,conn->dtls_psk,l);
	return l;
}

*/

int dtls_openssl_accept(struct conn * conn)
{
	if (!conn->dtls_data)
		conn->dtls_data = dtls_openssl_data_create(conn,DTLSv1_server_method(),&bio_methods);

	struct dtls_openssl_data * d = (struct dtls_openssl_data*)conn->dtls_data;
	if (!d)
		return 0;

//	if (conn->dtls_psk)
//		SSL_set_psk_server_callback( d->ssl, psk_server_cb);

	int i,rc; 
	for (i=0; i<conn->dtls_wait_timer; i++){	
		rc = SSL_accept(d->ssl);
		if (rc == 1)
		{
			conn->read = dtls_openssl_read;
			conn->write = dtls_openssl_write;
			return 1;
		}

		rc = dtls_openssl_log_error_queue("DTLS accept error:");
		if (rc)
			return 0;
	}
	cw_log(LOG_ERR,"DTLS Error: Timeout while establishing session with %s.",sock_addr2str(&conn->addr));
	return 0;
}