conntrackd: generalize/cleanup network message building/parsing

This patch generalizes the network message building and parsing
to prepare the upcoming expectation support.

Basically, it renames:

- NET_T_STATE_* by NET_T_STATE_CT_*, as I plan to add NET_T_STATE_EXP_*
- BUILD_NETMSG by BUILD_NETMSG_FROM_CT, and build_payload by ct2msg.
  I plan to add exp2msg.
- parse_payload by msg2ct, since I plan to add msg2exp.
- modify object_status_to_network_type to prepare the support of
  expectations.
- add prefix ct_ to all parsing functions in parse.c, as we will have
  similar functions to convert messages to expectation objects.

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

1 files changed, 2 insertions, 1 deletions

diff --git a/include/cache.h b/include/cache.h
index a42e395..02bb386 100644
--- a/include/cache.h
+++ b/include/cache.h
@@ -21,7 +21,8 @@ enum {
 	C_OBJ_NONE = 0,		/* not in the cache */
 	C_OBJ_NEW,		/* just added to the cache */
 	C_OBJ_ALIVE,		/* in the cache, alive */
-	C_OBJ_DEAD		/* still in the cache, but dead */
+	C_OBJ_DEAD,		/* still in the cache, but dead */
+	C_OBJ_MAX
 };
 
 struct cache;