MINOR: Add Mod Defender integration as contrib
This is a service that talks SPOE protocol and uses the Mod Defender (a
NAXSI clone) functionality to detect HTTP attacks. It returns a HTTP
status code to indicate whether the request is suspicious or not, based on
NAXSI rules. The value of the returned code can be used in HAProxy rules
to determine if the HTTP request should be blocked/rejected.
diff --git a/contrib/mod_defender/standalone.h b/contrib/mod_defender/standalone.h
new file mode 100644
index 0000000..9c9ccdd
--- /dev/null
+++ b/contrib/mod_defender/standalone.h
@@ -0,0 +1,52 @@
+/*
+ * Mod Defender for HAProxy
+ *
+ * Support for the Mod Defender code on non-Apache platforms.
+ *
+ * Copyright 2017 HAProxy Technologies, Dragan Dosen <ddosen@haproxy.com>
+ *
+ * Parts of code based on Apache HTTP Server source
+ * Copyright 2015 The Apache Software Foundation (http://www.apache.org/)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 3 of the License, or (at your option) any later version.
+ *
+ */
+#ifndef __STANDALONE_H__
+#define __STANDALONE_H__
+
+#include <http_core.h>
+#include <http_main.h>
+#include <http_config.h>
+
+#include <apr_pools.h>
+#include <apr_hooks.h>
+
+#define INSERT_BEFORE(f, before_this) ((before_this) == NULL \
+ || (before_this)->frec->ftype > (f)->frec->ftype \
+ || (before_this)->r != (f)->r)
+
+#define DECLARE_EXTERNAL_HOOK(ns,link,ret,name,args) \
+ns##_HOOK_##name##_t *run_##ns##_hook_##name = NULL; \
+link##_DECLARE(void) ns##_hook_##name(ns##_HOOK_##name##_t *pf, \
+ const char * const *aszPre, \
+ const char * const *aszSucc, int nOrder) \
+{ \
+ run_##ns##_hook_##name = pf; \
+}
+
+#define DECLARE_HOOK(ret,name,args) \
+ DECLARE_EXTERNAL_HOOK(ap,AP,ret,name,args)
+
+#define UNKNOWN_METHOD (-1)
+
+extern void (*logger)(int level, char *str);
+extern const char *read_module_config(server_rec *s, void *mconfig,
+ const command_rec *cmds,
+ apr_pool_t *p, apr_pool_t *ptemp,
+ const char *filename);
+extern int lookup_builtin_method(const char *method, apr_size_t len);
+
+#endif /* __STANDALONE_H__ */