helpers: implement CGDCONT reply parsing

New method to parse the PDP query reply, and build a list of structs with the
found info.

src/mm-modem-helpers.c

@@ -308,6 +308,83 @@ mm_3gpp_parse_scan_response (const gchar *reply,
 
 /*************************************************************************/
 
+static void
+mm_3gpp_pdp_context_free (MM3gppPdpContext *pdp)
+{
+    g_free (pdp->pdp_type);
+    g_free (pdp->apn);
+    g_free (pdp);
+}
+
+void
+mm_3gpp_pdp_context_list_free (GList *list)
+{
+    g_list_foreach (list, (GFunc)mm_3gpp_pdp_context_free, NULL);
+    g_list_free (list);
+}
+
+static gint
+mm_3gpp_pdp_context_cmp (MM3gppPdpContext *a,
+                         MM3gppPdpContext *b)
+{
+    return (a->cid - b->cid);
+}
+
+GList *
+mm_3gpp_parse_pdp_query_response (const gchar *reply,
+                                  GError **error)
+{
+    GError *inner_error = NULL;
+    GRegex *r;
+    GMatchInfo *match_info;
+    GList *list;
+
+    if (!reply[0])
+        /* No APNs configured, all done */
+        return NULL;
+
+    list = NULL;
+    r = g_regex_new ("\\+CGDCONT:\\s*(\\d+)\\s*,([^,\\)]*),([^,\\)]*),([^,\\)]*)",
+                     G_REGEX_DOLLAR_ENDONLY | G_REGEX_RAW,
+                     0, &inner_error);
+    if (r) {
+        g_regex_match_full (r, reply, strlen (reply), 0, 0, &match_info, &inner_error);
+
+        while (!inner_error &&
+               g_match_info_matches (match_info)) {
+            MM3gppPdpContext *pdp;
+            gchar *cid;
+
+            pdp = g_new0 (MM3gppPdpContext, 1);
+            cid = g_match_info_fetch (match_info, 1);
+            pdp->cid = (guint)atoi (cid);
+            pdp->pdp_type = get_unquoted_scan_value (match_info, 2);
+            pdp->apn = get_unquoted_scan_value (match_info, 3);
+            g_free (cid);
+
+            list = g_list_prepend (list, pdp);
+
+            g_match_info_next (match_info, &inner_error);
+        }
+
+        g_match_info_free (match_info);
+        g_regex_unref (r);
+    }
+
+    if (inner_error) {
+        mm_3gpp_pdp_context_list_free (list);
+        g_propagate_error (error, inner_error);
+        g_prefix_error (error, "Couldn't properly parse list of PDP contexts. ");
+        return NULL;
+    }
+
+    list = g_list_sort (list, (GCompareFunc)mm_3gpp_pdp_context_cmp);
+
+    return list;
+}
+
+/*************************************************************************/
+
 /* +CREG: <stat>                      (GSM 07.07 CREG=1 unsolicited) */
 #define CREG1 "\\+(CREG|CGREG):\\s*0*([0-9])"
 

src/mm-modem-helpers.h

@@ -32,10 +32,20 @@ typedef struct {
 } MM3gppNetworkInfo;
 
 void mm_3gpp_network_info_list_free (GList *info_list);
-
 GList *mm_3gpp_parse_scan_response (const gchar *reply,
                                     GError **error);
 
+/* PDP context query results */
+typedef struct {
+    guint cid;
+    gchar *pdp_type;
+    gchar *apn;
+} MM3gppPdpContext;
+
+void mm_3gpp_pdp_context_list_free (GList *pdp_list);
+GList *mm_3gpp_parse_pdp_query_response (const gchar *reply,
+                                         GError **error);
+
 GPtrArray *mm_gsm_creg_regex_get (gboolean solicited);
 
 void mm_gsm_creg_regex_destroy (GPtrArray *array);

src/tests/test-modem-helpers.c

@@ -1177,6 +1177,57 @@ test_cind_response_moto_v3m (void *f, gpointer d)
     test_cind_results ("Motorola V3m", reply, &expected[0], G_N_ELEMENTS (expected));
 }
 
+static void
+test_cgdcont_results (const gchar *desc,
+                      const gchar *reply,
+                      MM3gppPdpContext *expected_results,
+                      guint32 expected_results_len)
+{
+    GList *l;
+    GError *error = NULL;
+    GList *results;
+
+    g_print ("\nTesting %s +CGDCONT response...\n", desc);
+
+    results = mm_3gpp_parse_pdp_query_response (reply, &error);
+    g_assert (results);
+    g_assert_no_error (error);
+    g_assert_cmpuint (g_list_length (results), ==, expected_results_len);
+
+    for (l = results; l; l = g_list_next (l)) {
+        MM3gppPdpContext *pdp = l->data;
+        gboolean found = FALSE;
+        guint i;
+
+        for (i = 0; !found && i < expected_results_len; i++) {
+            MM3gppPdpContext *expected;
+
+            expected = &expected_results[i];
+            if (pdp->cid == expected->cid) {
+                found = TRUE;
+
+                g_assert_cmpstr (pdp->pdp_type, ==, expected->pdp_type);
+                g_assert_cmpstr (pdp->apn, ==, expected->apn);
+            }
+        }
+
+        g_assert (found == TRUE);
+    }
+
+    mm_3gpp_pdp_context_list_free (results);
+}
+
+static void
+test_cgdcont_response_nokia (void *f, gpointer d)
+{
+    const gchar *reply = "+CGDCONT: 1,\"IP\",,,0,0";
+    static MM3gppPdpContext expected[] = {
+        { 1, "IP", "" }
+    };
+
+    test_cgdcont_results ("Nokia", reply, &expected[0], G_N_ELEMENTS (expected));
+}
+
 static TestData *
 test_data_new (void)
 {
@@ -1297,6 +1348,8 @@ int main (int argc, char **argv)
         item++;
     }
 
+	g_test_suite_add (suite, TESTCASE (test_cgdcont_response_nokia, NULL));
+
     result = g_test_run ();
 
     test_data_free (data);