Minor rename in support of non-dbm file cache

Added the optional_dbm_support branch and made a minor renaming change
on this branch for the coming non-dbm file cache support.

server/Makefile.am

@@ -4,7 +4,7 @@ fwknopd_SOURCES   = fwknopd.c fwknopd.h config_init.c config_init.h \
                     fwknopd_common.h incoming_spa.c incoming_spa.h \
                     pcap_capture.c pcap_capture.h process_packet.c \
                     process_packet.h log_msg.c log_msg.h utils.c utils.h \
-                    sig_handler.c sig_handler.h replay_dbm.c replay_dbm.h \
+                    sig_handler.c sig_handler.h replay_cache.c replay_cache.h \
                     access.c access.h fwknopd_errors.c fwknopd_errors.h \
                     tcp_server.c tcp_server.h extcmd.c extcmd.h \
 					fw_util.c fw_util.h fw_util_ipf.c fw_util_ipf.h \

server/fwknopd.c

@@ -37,7 +37,7 @@
 #include "utils.h"
 #include "fw_util.h"
 #include "sig_handler.h"
-#include "replay_dbm.h"
+#include "replay_cache.h"
 #include "tcp_server.h"
 
 /* Prototypes
@@ -239,7 +239,7 @@ main(int argc, char **argv)
             dump_access_list(&opts);
         }
 
-        /* Initialize the digest cache (replay attack detection dbm)
+        /* Initialize the digest cache for replay attack detection
          * if so configured.
         */
         if(strncasecmp(opts.config[CONF_ENABLE_DIGEST_PERSISTENCE], "Y", 1) == 0)

server/incoming_spa.c

@@ -42,7 +42,7 @@
 #include "utils.h"
 #include "fw_util.h"
 #include "fwknopd_errors.h"
-#include "replay_dbm.h"
+#include "replay_cache.h"
 
 /* Validate and in some cases preprocess/reformat the SPA data.  Return an
  * error code value if there is any indication the data is not valid spa data.

server/replay_cache.c

@@ -1,13 +1,15 @@
 /*
  *****************************************************************************
  *
- * File:    replay_dbm.c
+ * File:    replay_cache.c
  *
  * Author:  Damien S. Stuart
  *
  * Purpose: Provides the functions to check for possible replay attacks
- *          by using a dbm (ndbm or gdbm in ndbm compatibility mode) file
- *          to store a digest of previously received SPA packets.
+ *          by using a cache of previously seen digests.  This cache is a
+ *          simple file by default, but can be made to use a dbm solution
+ *          (ndbm or gdbm in ndbm compatibility mode) file to store the digest
+ *          of a previously received SPA packets.
  *
  * Copyright 2010 Damien Stuart (dstuart@dstuart.org)
  *
@@ -30,7 +32,7 @@
  *
  *****************************************************************************
 */
-#include "replay_dbm.h"
+#include "replay_cache.h"
 #include "log_msg.h"
 #include "fwknopd_errors.h"
 

server/replay_cache.h

@@ -1,11 +1,11 @@
 /*
  *****************************************************************************
  *
- * File:    replay_dbm.h
+ * File:    replay_cache.h
  *
  * Author:  Damien Stuart (dstuart@dstuart.org)
  *
- * Purpose: Header file for fwknopd replay_dbm.c functions.
+ * Purpose: Header file for fwknopd replay_cache.c functions.
  *
  * Copyright 2010 Damien Stuart (dstuart@dstuart.org)
  *