initial commit

This patch bootstrap the new nft-sync software. Basically, this
software aims to support two different setups:

1) Rule-set repository server. The software serves the nft rule-set to
   clients that request the ruleset.

   Basically from the system that acts as repository, you have to run:

   # nft-sync -c ../contrib/nft-sync.conf.server

   Then, from the client:

   # nft-sync -c ../contrib/nft-sync.conf.client --fetch

   Which displays the nft rule-set in the standard output, so you
   can inspect the nft rule-set.

   Alternatively, the client can also retrieve and apply the nft
   rule-set using the pull command instead:

   # nft-sync -c ../contrib/nft-sync.conf.client --pull

   [ Note that this command above does not work in this bootstrap yet ]

2) Rule-set synchronization: In case of primary-backup and multiprimary
   firewall configurations, the software makes sure that the firewall
   cluster is deploying the same filtering policy. In this case, you have
   to launch the process:

   # nft-sync -c ../contrib/nft-sync.conf --sync

   [ Note that this command above does not work in this bootstrap yet ]

This bootstrap provides the basic infrastructure as a proof-of-concept.
Many of the necessary features are still lacking:

* Implement --sync and --pull commands.

* Interaction with nft through libnftnl, which allows the software to
  retrieve the local nft rule-set, as well as to parse it and apply it.

* SSL support, specifically the repository mode needs it to make sure
  nobody can steal your filtering policy from the network.

* IPv6 support.

* Allow to serve different rule-sets in the repository mode.

And many others that will be added progressively.

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

1 files changed, 30 insertions, 0 deletions

diff --git a/include/logging.h b/include/logging.h
new file mode 100644
index 0000000..e15170c
--- /dev/null
+++ b/include/logging.h
@@ -0,0 +1,30 @@
+#ifndef _NFT_SYNC_LOGGING_H_
+#define _NFT_SYNC_LOGGING_H_
+
+enum nft_sync_logging_type {
+	NFTS_LOG_T_FILE		= 0,
+	NFTS_LOG_T_SYSLOG,
+};
+
+enum nft_sync_logging_prio {
+	NFTS_LOG_DEBUG		= 0,
+	NFTS_LOG_INFO,
+	NFTS_LOG_NOTICE,
+	NFTS_LOG_ERROR,
+	NFTS_LOG_FATAL,
+	NFTS_LOG_MAX
+};
+
+struct nft_sync_inst;
+
+int nft_sync_log_init(struct nft_sync_inst *inst);
+void nft_sync_log(struct nft_sync_inst *inst, int priority,
+                  const char *format, ...);
+void nft_sync_log_fini(struct nft_sync_inst *inst);
+
+#include "config.h"
+
+#define nfts_log(prio, fmt, args...) 	\
+	nft_sync_log(&nfts_inst, prio, fmt, ##args)
+
+#endif