Transition from GeoIP Legacy to MaxMindDB.

MaxMind is discontinuing its legacy databases in April in favor of
GeoIP2, which use a newer database format (MaxMind DB). The reference C
library (libmaxminddb) is available under the Apache 2.0 license which
isn't quite compatible with ours.

Add mmdbresolve, a utility that reads IPv4 and IPv6 addresses on stdin
and prints resolved information on stdout. Place it under a liberal
license (MIT) so that we can keep libmaxminddb at arm's length. Add
epan/maxmind_db.[ch], which spawns mmdbresolve and communicates with it
via stdio.

Migrate the preferences and documentation to MaxMindDB.

Change the IPv4 and IPv6 asnum fields to FT_UINT32s. Change the
geographic coordinate fields to FT_DOUBLEs.

Bug: 10658
Change-Id: I24aeed637bea1b41d173270bda413af230f4425f
Reviewed-on: https://code.wireshark.org/review/26214
Petri-Dish: Gerald Combs <gerald@wireshark.org>
Tested-by: Petri Dish Buildbot
Reviewed-by: Gerald Combs <gerald@wireshark.org>

1 files changed, 93 insertions, 0 deletions

diff --git a/epan/maxmind_db.h b/epan/maxmind_db.h
new file mode 100644
index 0000000000..1b8e5fed0a
--- /dev/null
+++ b/epan/maxmind_db.h
@@ -0,0 +1,93 @@
+/* maxmind_db.h
+ * Maxmind database support
+ *
+ * Copyright 2018, Gerald Combs <gerald@wireshark.org>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef __MAXMIND_DB_H__
+#define __MAXMIND_DB_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include <epan/ipv6.h>
+#include <epan/prefs.h>
+#include "ws_symbol_export.h"
+
+typedef struct _mmdb_lookup_t {
+    gboolean found;
+    const char *country;
+    const char *city;
+    unsigned int as_number;
+    const char *as_org;
+    double latitude;
+    double longitude;
+} mmdb_lookup_t;
+
+/**
+ * Init function called from epan.h
+ */
+WS_DLL_LOCAL void maxmind_db_pref_init(module_t *nameres);
+
+/**
+ * Cleanup function called from epan.h
+ */
+WS_DLL_LOCAL void maxmind_db_pref_cleanup(void);
+
+/**
+ * Look up an IPv4 address in a database
+ *
+ * @param addr IPv4 address to look up
+ *
+ * @return The database entry if found, else NULL.
+ */
+WS_DLL_PUBLIC WS_RETNONNULL const mmdb_lookup_t *maxmind_db_lookup_ipv4(guint32 addr);
+
+/**
+ * Look up an IPv6 address in a database
+ *
+ * @param addr IPv6 address to look up
+ *
+ * @return The database entry if found, else NULL.
+ */
+WS_DLL_PUBLIC WS_RETNONNULL const mmdb_lookup_t *maxmind_db_lookup_ipv6(const ws_in6_addr *addr);
+
+/**
+ * Get all configured paths
+ *
+ * @return String with all paths separated by a path separator
+ */
+WS_DLL_PUBLIC gchar *maxmind_db_get_paths(void);
+
+/**
+ * Process outstanding requests.
+ *
+ * @return True if any new addresses were resolved.
+ */
+WS_DLL_LOCAL gboolean maxmind_db_lookup_process(void);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __MAXMIND_DB_H__ */
+
+/*
+ * Editor modelines
+ *
+ * Local Variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * ex: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */