[network-manager-applet] wifi: BSSID-lock connections to well-known SSIDs

[Dan Williams <dcbw src gnome org>]

commit eda1871902483300a0b94833dc45115be56fbf11
Author: Dan Williams <dcbw redhat com>
Date:   Tue May 11 17:20:01 2010 -0700

    wifi: BSSID-lock connections to well-known SSIDs
    
    For a certain list of known ESSIDs which are commonly preset by ISPs
    and manufacturers and often unchanged by users, lock the connection
    to the BSSID so that we don't try to auto-connect to your grandma's
    neighbor's WiFi.

 src/applet-device-wifi.c |   49 +++++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 46 insertions(+), 3 deletions(-)
---
diff --git a/src/applet-device-wifi.c b/src/applet-device-wifi.c
index e50cff4..a0acd81 100644
--- a/src/applet-device-wifi.c
+++ b/src/applet-device-wifi.c
@@ -17,7 +17,7 @@
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
- * (C) Copyright 2008 Red Hat, Inc.
+ * (C) Copyright 2008 - 2010 Red Hat, Inc.
  */
 
 #ifdef HAVE_CONFIG_H
@@ -322,6 +322,47 @@ none:
 	return NULL;
 }
 
+static void
+check_common_ssid (NMAccessPoint *ap, NMSettingWireless *s_wifi)
+{
+	const char *str_bssid;
+	struct ether_addr *eth_addr;
+	const GByteArray *ssid;
+	GByteArray *bssid;
+	const char *known[] = { "linksys", "O2DSL", "NETGEAR" };
+	guint i;
+
+	/* For a certain list of known ESSIDs which are commonly preset by ISPs
+	 * and manufacturers and often unchanged by users, lock the connection
+	 * to the BSSID so that we don't try to auto-connect to your grandma's
+	 * neighbor's WiFi.
+	 *
+	 * NOTE: this list should *not* contain networks that you would like to
+	 * automatically roam to like "Starbucks" or "AT&T" or "T-Mobile HotSpot".
+	 */
+	ssid = nm_access_point_get_ssid (ap);
+	for (i = 0; i < G_N_ELEMENTS (known); i++) {
+		if (   ssid->len == strlen (known[i])
+		    && memcmp (ssid->data, known[i], ssid->len) == 0)
+			break;
+	}
+	if (i == G_N_ELEMENTS (known))
+		return;
+
+	str_bssid = nm_access_point_get_hw_address (ap);
+	if (str_bssid) {
+		eth_addr = ether_aton (str_bssid);
+		if (eth_addr) {
+			bssid = g_byte_array_sized_new (ETH_ALEN);
+			g_byte_array_append (bssid, eth_addr->ether_addr_octet, ETH_ALEN);
+			g_object_set (G_OBJECT (s_wifi),
+			              NM_SETTING_WIRELESS_BSSID, bssid,
+			              NULL);
+			g_byte_array_free (bssid, TRUE);
+		}
+	}
+}
+
 static gboolean
 wireless_new_auto_connection (NMDevice *device,
                               gpointer dclass_data,
@@ -355,9 +396,11 @@ wireless_new_auto_connection (NMDevice *device,
 	mode = nm_access_point_get_mode (info->ap);
 	if (mode == NM_802_11_MODE_ADHOC)
 		g_object_set (s_wireless, NM_SETTING_WIRELESS_MODE, "adhoc", NULL);
-	else if (mode == NM_802_11_MODE_INFRA)
+	else if (mode == NM_802_11_MODE_INFRA) {
 		g_object_set (s_wireless, NM_SETTING_WIRELESS_MODE, "infrastructure", NULL);
-	else
+		/* Lock connection to this AP if it's a manufacturer-default SSID */
+		check_common_ssid (info->ap, s_wireless);
+	} else
 		g_assert_not_reached ();
 
 	dev_caps = nm_device_wifi_get_capabilities (NM_DEVICE_WIFI (device));