From 51966d70165d3f48a228fec7c47c1d0001b19efe Mon Sep 17 00:00:00 2001
From: Guido Günther <agx@sigxcpu.org>
Date: Fri, 26 Apr 2013 18:42:04 +0200
Subject: Initial commit

---
 content/caDNSResolver.js | 99 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 content/caDNSResolver.js

(limited to 'content/caDNSResolver.js')

diff --git a/content/caDNSResolver.js b/content/caDNSResolver.js
new file mode 100644
index 0000000..f6b029f
--- /dev/null
+++ b/content/caDNSResolver.js
@@ -0,0 +1,99 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * (C) 2013 Guido Günther <agx@sigxcpu.org>
+ */
+
+Components.utils.import("resource://gre/modules/ctypes.jsm");
+const GError = ctypes.StructType("GError");
+const GCancellable = ctypes.StructType("GCancellable");
+const GResolver = ctypes.StructType("GResolver");
+const GSrvTarget = ctypes.StructType("GSrvTarget");
+const gpointer = ctypes.void_t.ptr;
+
+var gioExist = false;
+try {
+    var glib = ctypes.open("libglib-2.0.so.0");
+    var gobject = ctypes.open("libgobject-2.0.so.0");
+    var gio = ctypes.open("libgio-2.0.so.0");
+    gioExist = true;
+} catch (ex) {
+    Components.utils.reportError("Failed to load gio: " + ex);
+}
+
+if (gioExist) {
+    caDNSResolver = function() {
+        this.gpointer = ctypes.void_t.ptr;
+        this._GList = new ctypes.StructType("_GList");
+        this._GList.define([{data: this.gpointer},
+                            {next: this._GList.ptr},
+                            {prev: this._GList.ptr}]);
+        this.GList = this._GList;
+
+        this.g_resolver_lookup_service = gio.declare(
+            "g_resolver_lookup_service",
+            ctypes.default_abi,
+            this.GList.ptr,      // return type: GList
+            GResolver.ptr,       // in: the resolver to use
+            ctypes.char.ptr,     // in: the service of look for
+            ctypes.char.ptr,     // in: the protocol the service should use
+            ctypes.char.ptr,     // in: the domain the service is offerd in
+            GCancellable.ptr,    // in: the cancellable
+            GError.ptr.ptr       // out: error
+        );
+
+        this.g_srv_target_get_hostname = gio.declare(
+            "g_srv_target_get_hostname",
+            ctypes.default_abi,
+            ctypes.char.ptr,     // return type: string
+            GSrvTarget.ptr       // in: Record to parse
+        );
+
+        this.g_resolver_get_default = gio.declare(
+            "g_resolver_get_default",
+            ctypes.default_abi,
+            GResolver.ptr        // return type: GResolver
+        );
+
+        this.g_resolver_free_targets = gio.declare(
+            "g_resolver_free_targets",
+            ctypes.default_abi,
+            ctypes.void_t,
+            this.GList.ptr       // in: List of GSrvTargets
+        );
+
+        this._resolver = this.g_resolver_get_default();
+
+        this.get_srv_records = function (service, proto, domain) {
+            var ret = [];
+            var records = this.g_resolver_lookup_service(this._resolver,
+                                                         service,
+                                                         proto,
+                                                         domain,
+                                                         null,
+                                                         null);
+            if (records.isNull()) {
+                Components.utils.reportError("Failed to lookup: " + service);
+                return [];
+            } else {
+                Components.utils.reportError("records: " + records);
+                // For PoC just look at the first record
+                // and ignore weight and prio
+                var tmp = records.contents.data;
+                var rec = ctypes.cast(tmp, GSrvTarget.ptr);
+                var val = this.g_srv_target_get_hostname (rec);
+                ret[0] = val.readString();
+                Components.utils.reportError("ret: " + ret);
+                this.g_resolver_free_targets(records);
+            }
+            return ret;
+        };
+    };
+} else {
+    caDNSResolver = function() {
+        this.get_srv_records = function (service, proto, domain) {
+            return null;
+        };
+    };
+}
-- 
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