Add tweak values 1-15, sets orca version in the user agent

Since there are some issues I can't reproduce, let's do this experiment
properly and figure out if this really matters.

Value 1 is slightly newer. Value 2 is newer with the current set of
fields. Value 3 is what purple-facebook uses.

Adding 4 makes it http only, adding 8 makes it mqtt only. Some values
are redundant.

I suggest trying 1, 2, 3, 7 and 11.

4 files changed, 49 insertions, 2 deletions

diff --git a/facebook/facebook-api.c b/facebook/facebook-api.c
index 0ff315f..a72f386 100644
--- a/facebook/facebook-api.c
+++ b/facebook/facebook-api.c
@@ -89,6 +89,27 @@ fb_api_contacts_delta(FbApi *api, const gchar *delta_cursor);
 
 G_DEFINE_TYPE(FbApi, fb_api, G_TYPE_OBJECT);
 
+static const gchar *agents[] = {
+    FB_API_AGENT,
+    FB_API_AGENT_BASE " " "[FBAN/Orca-Android;FBAV/64.0.0.5.83;FBPN/com.facebook.orca;FBLC/en_US;FBBV/26040814]",
+    FB_API_AGENT_BASE " " "[FBAN/Orca-Android;FBAV/109.0.0.17.70;FBBV/52182662]",
+    FB_API_AGENT_BASE " " "[FBAN/Orca-Android;FBAV/109.0.0.17.70;FBPN/com.facebook.orca;FBLC/en_US;FBBV/52182662]",
+    NULL,
+};
+
+static const gchar *
+fb_api_get_agent_string(int tweak, gboolean mqtt)
+{
+    gboolean http_only = tweak & 4;
+    gboolean mqtt_only = tweak & 8;
+
+    if (tweak <= 0 || tweak > 15 || (http_only && mqtt) || (mqtt_only && !mqtt)) {
+        return agents[0];
+    }
+
+    return agents[tweak & 3];
+}
+
 static void
 fb_api_set_property(GObject *obj, guint prop, const GValue *val,
                     GParamSpec *pspec)
@@ -120,6 +141,7 @@ fb_api_set_property(GObject *obj, guint prop, const GValue *val,
         break;
     case PROP_TWEAK:
         priv->tweak = g_value_get_int(val);
+        fb_http_set_agent(priv->http, fb_api_get_agent_string(priv->tweak, 0));
         break;
 
     default:
@@ -896,7 +918,9 @@ fb_api_cb_mqtt_open(FbMqtt *mqtt, gpointer data)
 
     /* Write the information string */
     fb_thrift_write_field(thft, FB_THRIFT_TYPE_STRING, 2, 1);
-    fb_thrift_write_str(thft, FB_API_MQTT_AGENT);
+    fb_thrift_write_str(thft, (priv->tweak != 0)
+        ? fb_api_get_agent_string(priv->tweak, 1)
+        : FB_API_MQTT_AGENT);
 
     /* Write the UNKNOWN ("cp"?) */
     fb_thrift_write_field(thft, FB_THRIFT_TYPE_I64, 3, 2);
diff --git a/facebook/facebook-api.h b/facebook/facebook-api.h
index 7236b48..3ed0e41 100644
--- a/facebook/facebook-api.h
+++ b/facebook/facebook-api.h
@@ -110,7 +110,8 @@
  *
  * The HTTP User-Agent header.
  */
-#define FB_API_AGENT  "Facebook plugin / BitlBee / " PACKAGE_VERSION " " FB_ORCA_AGENT
+#define FB_API_AGENT_BASE "Facebook plugin / BitlBee / " PACKAGE_VERSION
+#define FB_API_AGENT FB_API_AGENT_BASE " " FB_ORCA_AGENT
 
 /**
  * FB_API_MQTT_AGENT
diff --git a/facebook/facebook-http.c b/facebook/facebook-http.c
index 6234d55..7335848 100644
--- a/facebook/facebook-http.c
+++ b/facebook/facebook-http.c
@@ -242,6 +242,20 @@ fb_http_cookies_parse_request(FbHttp *http, FbHttpRequest *req)
     g_strfreev(hdrs);
 }
 
+void
+fb_http_set_agent(FbHttp *http, const gchar *agent)
+{
+    FbHttpPrivate *priv;
+
+    g_return_if_fail(FB_IS_HTTP(http));
+    priv = http->priv;
+
+    if (agent != priv->agent && g_strcmp0(agent, priv->agent)) {
+        g_free(priv->agent);
+        priv->agent = g_strdup(agent);
+    }
+}
+
 FbHttpRequest *
 fb_http_request_new(FbHttp *http, const gchar *url, gboolean post,
                     FbHttpFunc func, gpointer data)
diff --git a/facebook/facebook-http.h b/facebook/facebook-http.h
index b3ff001..f7d02d9 100644
--- a/facebook/facebook-http.h
+++ b/facebook/facebook-http.h
@@ -206,6 +206,14 @@ void
 fb_http_cookies_parse_request(FbHttp *http, FbHttpRequest *req);
 
 /**
+ * fb_http_set_agent:
+ * @http: The #FbHttp.
+ * @agent: The new user agent string.
+ */
+void
+fb_http_set_agent(FbHttp *http, const gchar *agent);
+
+/**
  * fb_http_request_new:
  * @http: The #FbHttp.
  * @url: The url.