detect: implement http referer sticky buffer

src/Makefile.am

@@ -176,6 +176,7 @@ detect-http-method.c detect-http-method.h \
 detect-http-protocol.c detect-http-protocol.h \
 detect-http-raw-header.c detect-http-raw-header.h \
 detect-http-raw-uri.c detect-http-raw-uri.h \
+detect-http-referer.c detect-http-referer.h \
 detect-http-request-line.c detect-http-request-line.h \
 detect-http-response-line.c detect-http-response-line.h \
 detect-http-server-body.c detect-http-server-body.h \

src/detect-http-headers.c

@@ -16,8 +16,10 @@
  */
 
 #include "detect-http-accept.h"
+#include "detect-http-referer.h"
 
 void DetectHttpHeadersRegister(void)
 {
     RegisterHttpHeadersAccept();
+    RegisterHttpHeadersReferer();
 }

src/detect-http-referer.c

@@ -0,0 +1,46 @@
+/* Copyright (C) 2007-2017 Open Information Security Foundation
+ *
+ * You can copy, redistribute or modify this Program under the terms of
+ * the GNU General Public License version 2 as published by the Free
+ * Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/**
+ * \ingroup httplayer
+ *
+ * @{
+ */
+
+
+/**
+ * \file
+ *
+ * \author Victor Julien <victor@inliniac.net>
+ *
+ * Implements support http_referer sticky buffer
+ */
+
+#define KEYWORD_NAME "http_referer"
+#define KEYWORD_DOC "http-keywords#http-referer"
+#define BUFFER_NAME "http_referer"
+#define BUFFER_DESC "http referer header"
+#define HEADER_NAME "Referer"
+#define KEYWORD_ID DETECT_AL_HTTP_HEADER_REFERER
+#define KEYWORD_TOSERVER 1
+
+#include "detect-http-headers-stub.h"
+
+void RegisterHttpHeadersReferer(void)
+{
+    DetectHttpHeadersRegisterStub();
+}

src/detect-http-referer.h

@@ -0,0 +1,23 @@
+/* Copyright (C) 2007-2017 Open Information Security Foundation
+ *
+ * You can copy, redistribute or modify this Program under the terms of
+ * the GNU General Public License version 2 as published by the Free
+ * Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#ifndef __DETECT_HTTP_REFERER_H__
+#define __DETECT_HTTP_REFERER_H__
+
+void RegisterHttpHeadersReferer(void);
+
+#endif /* __DETECT_HTTP_REFERER_H__ */

src/detect.h

@@ -1242,6 +1242,7 @@ enum {
     DETECT_AL_HTTP_HEADER,
     DETECT_AL_HTTP_HEADER_NAMES,
     DETECT_AL_HTTP_HEADER_ACCEPT,
+    DETECT_AL_HTTP_HEADER_REFERER,
     DETECT_AL_HTTP_RAW_HEADER,
     DETECT_AL_HTTP_URI,
     DETECT_AL_HTTP_RAW_URI,