* Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
*
* For more information, please see http://nath323.sourceforge.net/
- *
- * Changes:
- * 2006-02-01 - initial version 0.1
- *
- * 2006-02-20 - version 0.2
- * 1. Changed source format to follow kernel conventions
- * 2. Deleted some unnecessary structures
- * 3. Minor fixes
- *
- * 2006-03-10 - version 0.3
- * 1. Added support for multiple TPKTs in one packet (suggested by
- * Patrick McHardy)
- * 2. Avoid excessive stack usage (based on Patrick McHardy's patch)
- * 3. Added support for non-linear skb (based on Patrick McHardy's patch)
- * 4. Fixed missing H.245 module owner (Patrick McHardy)
- * 5. Avoid long RAS expectation chains (Patrick McHardy)
- * 6. Fixed incorrect __exit attribute (Patrick McHardy)
- * 7. Eliminated unnecessary return code
- * 8. Fixed incorrect use of NAT data from conntrack code (suggested by
- * Patrick McHardy)
- * 9. Fixed TTL calculation error in RCF
- * 10. Added TTL support in RRQ
- * 11. Better support for separate TPKT header and data
- *
- * 2006-03-15 - version 0.4
- * 1. Added support for T.120 channels
- * 2. Added parameter gkrouted_only (suggested by Patrick McHardy)
- * 3. Splitted ASN.1 code and data (suggested by Patrick McHardy)
- * 4. Sort ASN.1 data to avoid forwarding declarations (suggested by
- * Patrick McHardy)
- * 5. Reset next TPKT data length in get_tpkt_data()
*/
#include <linux/config.h>
#include <linux/netfilter_ipv4/ip_conntrack_h323.h>
#include <linux/moduleparam.h>
-#include "ip_conntrack_helper_h323_asn1.h"
-
#if 0
#define DEBUGP printk
#else
#endif
/* Parameters */
+static unsigned int default_rrq_ttl = 300;
+module_param(default_rrq_ttl, uint, 0600);
+MODULE_PARM_DESC(default_rrq_ttl, "use this TTL if it's missing in RRQ");
+
static int gkrouted_only = 1;
module_param(gkrouted_only, int, 0600);
MODULE_PARM_DESC(gkrouted_only, "only accept calls from gatekeeper");
/* Validate TPKT length */
tpktlen = tpkt[2] * 256 + tpkt[3];
+ if (tpktlen < 4)
+ goto clear_out;
if (tpktlen > tcpdatalen) {
if (tcpdatalen == 4) { /* Separate TPKT header */
/* Netmeeting sends TPKT header and data separately */
}
/****************************************************************************/
-int get_h245_addr(unsigned char *data, H245_TransportAddress * addr,
- u_int32_t * ip, u_int16_t * port)
+static int get_h245_addr(unsigned char *data, H245_TransportAddress * addr,
+ u_int32_t * ip, u_int16_t * port)
{
unsigned char *p;
DEBUGP("ip_ct_ras: RRQ TTL = %u seconds\n", rrq->timeToLive);
info->timeout = rrq->timeToLive;
} else
- info->timeout = 0;
+ info->timeout = default_rrq_ttl;
return 0;
}
module_init(init);
module_exit(fini);
-EXPORT_SYMBOL(get_h245_addr);
-EXPORT_SYMBOL(get_h225_addr);
-EXPORT_SYMBOL(ip_conntrack_h245_expect);
-EXPORT_SYMBOL(ip_conntrack_q931_expect);
-EXPORT_SYMBOL(set_h245_addr_hook);
-EXPORT_SYMBOL(set_h225_addr_hook);
-EXPORT_SYMBOL(set_sig_addr_hook);
-EXPORT_SYMBOL(set_ras_addr_hook);
-EXPORT_SYMBOL(nat_rtp_rtcp_hook);
-EXPORT_SYMBOL(nat_t120_hook);
-EXPORT_SYMBOL(nat_h245_hook);
-EXPORT_SYMBOL(nat_q931_hook);
+EXPORT_SYMBOL_GPL(get_h225_addr);
+EXPORT_SYMBOL_GPL(ip_conntrack_h245_expect);
+EXPORT_SYMBOL_GPL(ip_conntrack_q931_expect);
+EXPORT_SYMBOL_GPL(set_h245_addr_hook);
+EXPORT_SYMBOL_GPL(set_h225_addr_hook);
+EXPORT_SYMBOL_GPL(set_sig_addr_hook);
+EXPORT_SYMBOL_GPL(set_ras_addr_hook);
+EXPORT_SYMBOL_GPL(nat_rtp_rtcp_hook);
+EXPORT_SYMBOL_GPL(nat_t120_hook);
+EXPORT_SYMBOL_GPL(nat_h245_hook);
+EXPORT_SYMBOL_GPL(nat_q931_hook);
MODULE_AUTHOR("Jing Min Zhao <zhaojingmin@users.sourceforge.net>");
MODULE_DESCRIPTION("H.323 connection tracking helper");