From 1af39d55cfae70bc112e75fb85c363d1c0d14280 Mon Sep 17 00:00:00 2001
From: Victor Julien <victor@inliniac.net>
Date: Thu, 13 Mar 2014 17:09:28 +0100
Subject: [PATCH] detect: allow alias registration for rule keywords

This allows for registering a keyword under another name while keeping
the old name active and supported.

Do this for 'luajit', which can now also be used as just 'lua'.
---
 src/detect-luajit.c | 2 ++
 src/detect-parse.c  | 2 ++
 src/detect.h        | 3 ++-
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/detect-luajit.c b/src/detect-luajit.c
index bbd710af08..bae31fcdfa 100644
--- a/src/detect-luajit.c
+++ b/src/detect-luajit.c
@@ -71,6 +71,7 @@ static int DetectLuajitSetupNoSupport (DetectEngineCtx *a, Signature *b, char *c
  */
 void DetectLuajitRegister(void) {
     sigmatch_table[DETECT_LUAJIT].name = "luajit";
+    sigmatch_table[DETECT_LUAJIT].alias = "lua";
     sigmatch_table[DETECT_LUAJIT].Setup = DetectLuajitSetupNoSupport;
     sigmatch_table[DETECT_LUAJIT].Free  = NULL;
     sigmatch_table[DETECT_LUAJIT].RegisterTests = NULL;
@@ -95,6 +96,7 @@ static void DetectLuajitFree(void *);
  */
 void DetectLuajitRegister(void) {
     sigmatch_table[DETECT_LUAJIT].name = "luajit";
+    sigmatch_table[DETECT_LUAJIT].alias = "lua";
     sigmatch_table[DETECT_LUAJIT].desc = "match via a luajit script";
     sigmatch_table[DETECT_LUAJIT].url = "https://redmine.openinfosecfoundation.org/projects/suricata/wiki/Lua_scripting";
     sigmatch_table[DETECT_LUAJIT].Match = DetectLuajitMatch;
diff --git a/src/detect-parse.c b/src/detect-parse.c
index 696ea28ab5..f147d0c798 100644
--- a/src/detect-parse.c
+++ b/src/detect-parse.c
@@ -273,6 +273,8 @@ SigTableElmt *SigTableGet(char *name) {
         if (st->name != NULL) {
             if (strcasecmp(name,st->name) == 0)
                 return st;
+            if (st->alias != NULL && strcasecmp(name,st->alias) == 0)
+                return st;
         }
     }
 
diff --git a/src/detect.h b/src/detect.h
index 86469995c4..4ad199ac26 100644
--- a/src/detect.h
+++ b/src/detect.h
@@ -897,7 +897,8 @@ typedef struct SigTableElmt_ {
     void (*RegisterTests)(void);
 
     uint8_t flags;
-    char *name;
+    char *name;     /**< keyword name alias */
+    char *alias;    /**< name alias */
     char *desc;
     char *url;
 
-- 
2.47.2