Add geo lookup support. See #22.

apache2/msc_geo.h

@@ -0,0 +1,62 @@
+/*
+ * ModSecurity for Apache 2.x, http://www.modsecurity.org/
+ * Copyright (c) 2004-2006 Thinking Stone (http://www.thinkingstone.com)
+ *
+ * You should have received a copy of the licence along with this
+ * program (stored in the file "LICENSE"). If the file is missing,
+ * or if you have any other questions related to the licence, please
+ * write to Thinking Stone at contact@thinkingstone.com.
+ *
+ */
+#ifndef _MSC_GEO_H_
+#define _MSC_GEO_H_
+
+#define GEO_STRUCT_INFO_MAX_SIZE  20
+#define GEO_DB_INFO_MAX_SIZE      100
+#define GEO_COUNTRY_OFFSET        0xffff00
+#define GEO_MAX_RECORD_LEN        4
+#define GEO_COUNTRY_UNKNOWN       "Unknown"
+#define GEO_CITY_UNKNOWN          "Unknown"
+#define GEO_CITY_RECORD_LEN       50
+#define GEO_COUNTRY_DATABASE      1
+#define GEO_CITY_DATABASE_0       6
+#define GEO_CITY_DATABASE_1       2
+
+typedef struct geo_rec geo_rec;
+typedef struct geo_db geo_db;
+
+#include <apr_file_io.h>
+#include "modsecurity.h"
+
+/* Structures */
+
+struct geo_rec {
+    const char *country_code;
+    const char *country_code3;
+    const char *country_name;
+    const char *country_continent;
+    const char *region;
+    const char *city;
+    const char *postal_code;
+    float       latitude;
+    float       longitude;
+    int         dma_code;
+    int         area_code;
+};
+
+struct geo_db {
+    apr_file_t *db;
+    const char *dbfn;
+    int dbtype;
+    unsigned int ctry_offset;
+};
+
+/* Functions */
+
+int DSOLOCAL geo_init(directory_config *dcfg, const char *dbfn, char **error_msg);
+
+int DSOLOCAL geo_lookup(modsec_rec *msr, geo_rec *rec, const char *target, char **error_msg);
+
+apr_status_t DSOLOCAL geo_cleanup(modsec_rec *msr);
+
+#endif