From 46febef7cd1ceda05b9ab1bf0dbc94e50bc4ce17 Mon Sep 17 00:00:00 2001
From: Victor Julien <victor@inliniac.net>
Date: Sat, 1 Apr 2017 12:38:46 +0200
Subject: [PATCH] detect: implement http_accept_enc sticky buffer

Inspects Accept-Encoding header.
---
 src/Makefile.am              |  1 +
 src/detect-http-accept-enc.c | 46 ++++++++++++++++++++++++++++++++++++
 src/detect-http-accept-enc.h | 23 ++++++++++++++++++
 src/detect-http-headers.c    |  2 ++
 src/detect.h                 |  1 +
 5 files changed, 73 insertions(+)
 create mode 100644 src/detect-http-accept-enc.c
 create mode 100644 src/detect-http-accept-enc.h

diff --git a/src/Makefile.am b/src/Makefile.am
index 460c75c82c..7d30e666ac 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -164,6 +164,7 @@ detect-geoip.c detect-geoip.h \
 detect-gid.c detect-gid.h \
 detect-hostbits.c detect-hostbits.h \
 detect-http-accept.c detect-http-accept.h \
+detect-http-accept-enc.c detect-http-accept-enc.h \
 detect-http-accept-lang.c detect-http-accept-lang.h \
 detect-http-client-body.c detect-http-client-body.h \
 detect-http-connection.c detect-http-connection.h \
diff --git a/src/detect-http-accept-enc.c b/src/detect-http-accept-enc.c
new file mode 100644
index 0000000000..94e3c62158
--- /dev/null
+++ b/src/detect-http-accept-enc.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 http_accept_enc sticky buffer
+ */
+
+#define KEYWORD_NAME "http_accept_enc"
+#define KEYWORD_DOC "http-keywords#http-accept-enc"
+#define BUFFER_NAME "http_accept_enc"
+#define BUFFER_DESC "http accept encoding header"
+#define HEADER_NAME "Accept-Encoding"
+#define KEYWORD_ID DETECT_AL_HTTP_HEADER_ACCEPT_ENC
+#define KEYWORD_TOSERVER 1
+
+#include "detect-http-headers-stub.h"
+
+void RegisterHttpHeadersAcceptEnc(void)
+{
+    DetectHttpHeadersRegisterStub();
+}
diff --git a/src/detect-http-accept-enc.h b/src/detect-http-accept-enc.h
new file mode 100644
index 0000000000..040ece82ee
--- /dev/null
+++ b/src/detect-http-accept-enc.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_ACCEPT_LEN_H__
+#define __DETECT_HTTP_ACCEPT_LEN_H__
+
+void RegisterHttpHeadersAcceptEnc(void);
+
+#endif /* __DETECT_HTTP_ACCEPT_LEN_H__ */
diff --git a/src/detect-http-headers.c b/src/detect-http-headers.c
index 93380ab9b0..c1bde84a91 100644
--- a/src/detect-http-headers.c
+++ b/src/detect-http-headers.c
@@ -16,6 +16,7 @@
  */
 
 #include "detect-http-accept.h"
+#include "detect-http-accept-enc.h"
 #include "detect-http-accept-lang.h"
 #include "detect-http-connection.h"
 #include "detect-http-referer.h"
@@ -23,6 +24,7 @@
 void DetectHttpHeadersRegister(void)
 {
     RegisterHttpHeadersAccept();
+    RegisterHttpHeadersAcceptEnc();
     RegisterHttpHeadersAcceptLang();
     RegisterHttpHeadersReferer();
     RegisterHttpHeadersConnection();
diff --git a/src/detect.h b/src/detect.h
index 6d266ca014..6a30a575ef 100644
--- a/src/detect.h
+++ b/src/detect.h
@@ -1243,6 +1243,7 @@ enum {
     DETECT_AL_HTTP_HEADER_NAMES,
     DETECT_AL_HTTP_HEADER_ACCEPT,
     DETECT_AL_HTTP_HEADER_ACCEPT_LANG,
+    DETECT_AL_HTTP_HEADER_ACCEPT_ENC,
     DETECT_AL_HTTP_HEADER_CONNECTION,
     DETECT_AL_HTTP_HEADER_REFERER,
     DETECT_AL_HTTP_RAW_HEADER,