Implements TTL security for OSPF and RIP.

Interfaces for OSPF and RIP could be configured to use (and request)
TTL 255 for traffic to direct neighbors.

Thanks to Simon Dickhoven for the original patch for RIPng.

1 files changed, 2 insertions, 0 deletions

diff --git a/proto/rip/rip.h b/proto/rip/rip.h
index 2cce8c81..6e0d5aad 100644
--- a/proto/rip/rip.h
+++ b/proto/rip/rip.h
@@ -114,6 +114,7 @@ struct rip_interface {
   struct rip_connection *busy;
   int metric;			/* You don't want to put struct rip_patt *patt here -- think about reconfigure */
   int mode;
+  int check_ttl;		/* Check incoming packets for TTL 255 */
   int triggered;
   struct object_lock *lock;
   int multicast;
@@ -130,6 +131,7 @@ struct rip_patt {
 #define IM_VERSION1 16
   int tx_tos;
   int tx_priority;
+  int ttl_security;	/* bool + 2 for TX only (send, but do not check on RX) */
 };
 
 struct rip_proto_config {