ftfw: fix race condition in the helloing routine

This patch fixes a race condition that can prevent one node from sending
the initial hello message required to reset the sequence tracking.

               node A                   node B
                  |                        |
        start     |                        |
        hello msg |----------------------->|
        stop      |                        |
        start     |                        |
                  |<-----------------------| hello-back msg

In the picture above, the node A never sends the hello messages. Thus,
the node B drops the next messages as they are in the before boundary.
This patch adds a new state to the the helloing state-machine to fix
this problem.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 0 insertions, 6 deletions

diff --git a/include/network.h b/include/network.h
index 777be11..d2e4edd 100644
--- a/include/network.h
+++ b/include/network.h
@@ -65,12 +65,6 @@ enum {
 	SEQ_BEFORE,
 };
 
-enum {
-	SAY_HELLO,
-	HELLO_BACK,
-	HELLO_DONE,
-};
-
 int mcast_track_seq(uint32_t seq, uint32_t *exp_seq);
 void mcast_track_update_seq(uint32_t seq);
 int mcast_track_is_seq_set(void);