gsm: add cell access technology reporting to Scan()

introspection/mm-modem-gsm-network.xml

@@ -23,7 +23,7 @@
       <annotation name="org.freedesktop.DBus.GLib.CSymbol" value="impl_gsm_modem_scan"/>
       <arg name="results" type="aa{ss}" direction="out">
 	<tp:docstring>
-	  Found networks. It's an array of dictionaries (strings for keys and values), the list of known keys is the following: status, operator-long, operator-short, operator-num.
+	  Found networks. It's an array of dictionaries (strings for keys and values), the list of known keys is the following: status, operator-long, operator-short, operator-num, access-tech.
 	</tp:docstring>
       </arg>
     </method>

src/mm-generic-gsm.c

@@ -1132,21 +1132,27 @@ scan_done (MMSerialPort *port,
         GRegex *r;
         GMatchInfo *match_info;
         GError *err = NULL;
+        gboolean umts_format = TRUE;
 
         reply = strstr (reply, "+COPS: ") + 7;
 
         /* Pattern without crazy escaping using | for matching: (|\d|,"|.+|","|.+|","|.+|"\)?,|\d|) */
 
-        /* Quirk: Sony-Ericsson TM-506 sometimes includes a stray ')' like so:
+        /* Cell access technology (GSM, UTRAN, etc) got added later and not all
+         * modems implement it.  Some modesm have quirks that make it hard to
+         * use one regular experession for matching both pre-UMTS and UMTS
+         * responses.  So try UMTS-format first and fall back to pre-UMTS if
+         * we get no UMTS-formst matches.
+         */
+
+        /* Quirk: Sony-Ericsson TM-506 sometimes includes a stray ')' like so,
+         *        which is what makes it hard to match both pre-UMTS and UMTS in
+         *        the same regex:
          *
          *       +COPS: (2,"","T-Mobile","31026",0),(1,"AT&T","AT&T","310410"),0)
-         *
-         * Quirk: Motorola C-series (BUSlink SCWi275u) don't include the operator
-         *        number, like so:
-         *
-         *       +COPS: (2,"T-Mobile","","310260"),(0,"Cingular Wireless","","310410")
          */
-        r = g_regex_new ("\\((\\d),\"(.*)\",\"(.*)\",\"(.*)\"\\)?[,]?[(\\d)]?\\)", G_REGEX_UNGREEDY, 0, &err);
+
+        r = g_regex_new ("\\((\\d),\"(.*)\",\"(.*)\",\"(.*)\"[\\)]?,(\\d)\\)", G_REGEX_UNGREEDY, 0, &err);
         if (err) {
             g_error ("Invalid regular expression: %s", err->message);
             g_error_free (err);
@@ -1155,11 +1161,39 @@ scan_done (MMSerialPort *port,
             goto out;
         }
 
-        results = g_ptr_array_new ();
+        /* If we didn't get any hits, try the pre-UMTS format match */
+        if (!g_regex_match (r, reply, 0, &match_info)) {
+            g_regex_unref (r);
+            if (match_info) {
+                g_match_info_free (match_info);
+                match_info = NULL;
+            }
 
-        g_regex_match (r, reply, 0, &match_info);
+            /* Pre-UMTS format doesn't include the cell access technology after
+             * the numeric operator element.
+             *
+             * Ex: Motorola C-series (BUSlink SCWi275u) like so:
+             *
+             *       +COPS: (2,"T-Mobile","","310260"),(0,"Cingular Wireless","","310410")
+             */
+            r = g_regex_new ("\\((\\d),\"(.*)\",\"(.*)\",\"(.*)\"\\)", G_REGEX_UNGREEDY, 0, &err);
+            if (err) {
+                g_error ("Invalid regular expression: %s", err->message);
+                g_error_free (err);
+                info->error = g_error_new_literal (MM_MODEM_ERROR, MM_MODEM_ERROR_GENERAL,
+                                                   "Could not parse scan results.");
+                goto out;
+            }
+
+            g_regex_match (r, reply, 0, &match_info);
+            umts_format = FALSE;
+        }
+
+        /* Parse the results */
+        results = g_ptr_array_new ();
         while (g_match_info_matches (match_info)) {
             GHashTable *hash;
+            char *access_tech = NULL;
 
             hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
             g_hash_table_insert (hash, g_strdup ("status"), g_match_info_fetch (match_info, 1));
@@ -1167,6 +1201,16 @@ scan_done (MMSerialPort *port,
             g_hash_table_insert (hash, g_strdup ("operator-short"), g_match_info_fetch (match_info, 3));
             g_hash_table_insert (hash, g_strdup ("operator-num"), g_match_info_fetch (match_info, 4));
 
+            /* Only try for access technology with UMTS-format matches */
+            if (umts_format)
+                access_tech = g_match_info_fetch (match_info, 5);
+            if (access_tech && (strlen (access_tech) == 1)) {
+                /* Recognized access technologies are between '0' and '6' inclusive... */
+                if ((access_tech[0] >= 48) && (access_tech[0] <= 54))
+                    g_hash_table_insert (hash, g_strdup ("access-tech"), access_tech);
+            } else
+                g_free (access_tech);
+
             g_ptr_array_add (results, hash);
             g_match_info_next (match_info, NULL);
         }

test/mm-test.py

@@ -146,7 +146,7 @@ def inspect_gsm(proxy, dump_private):
     print "Signal quality: %d" % net.GetSignalQuality()
 
     print "Scanning..."
-    results = net.Scan(timeout=60)
+    results = net.Scan(timeout=120)
     for r in results:
         status = r['status']
         if status == "1":
@@ -158,10 +158,30 @@ def inspect_gsm(proxy, dump_private):
         else:
             status = "(Unknown)"
 
+        access_tech = ""
+        try:
+            access_tech_num = r['access-tech']
+            if access_tech_num == "0":
+                access_tech = "(GSM)"
+            elif access_tech_num == "1":
+                access_tech = "(Compact GSM)"
+            elif access_tech_num == "2":
+                access_tech = "(UMTS)"
+            elif access_tech_num == "3":
+                access_tech = "(EDGE)"
+            elif access_tech_num == "4":
+                access_tech = "(HSDPA)"
+            elif access_tech_num == "5":
+                access_tech = "(HSUPA)"
+            elif access_tech_num == "6":
+                access_tech = "(HSPA)"
+        except KeyError:
+            pass
+
         if len(r['operator-long']):
-            print "%s: %s" % (r['operator-long'], status)
+            print "%s: %s %s" % (r['operator-long'], status, access_tech)
         else:
-            print "%s: %s" % (r['operator-short'], status)
+            print "%s: %s %s" % (r['operator-short'], status, access_tech)
 
 
 dump_private = False