sierra-legacy: implement connection status monitoring with !SCACT?

Devices like the Netgear AC313U require explicit context monitoring,
otherwise the device may end up disconnected internally and MM would
still think that the connection is ongoing.

1 files changed, 84 insertions, 0 deletions

diff --git a/plugins/sierra/mm-modem-helpers-sierra.c b/plugins/sierra/mm-modem-helpers-sierra.c
new file mode 100644
index 00000000..14324614
--- /dev/null
+++ b/plugins/sierra/mm-modem-helpers-sierra.c
@@ -0,0 +1,84 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2018 Aleksander Morgado <aleksander@aleksander.es>
+ */
+
+#include <glib.h>
+#include <string.h>
+
+#include "mm-log.h"
+#include "mm-modem-helpers.h"
+#include "mm-modem-helpers-sierra.h"
+
+GList *
+mm_sierra_parse_scact_read_response (const gchar  *reply,
+                                     GError      **error)
+{
+    GError     *inner_error = NULL;
+    GRegex     *r;
+    GMatchInfo *match_info;
+    GList      *list;
+
+    if (!reply || !reply[0])
+        /* Nothing configured, all done */
+        return NULL;
+
+    list = NULL;
+    r = g_regex_new ("!SCACT:\\s*(\\d+),(\\d+)",
+                     G_REGEX_DOLLAR_ENDONLY | G_REGEX_RAW, 0, &inner_error);
+    g_assert (r);
+
+    g_regex_match_full (r, reply, strlen (reply), 0, 0, &match_info, &inner_error);
+    while (!inner_error && g_match_info_matches (match_info)) {
+        MM3gppPdpContextActive *pdp_active;
+        guint cid = 0;
+        guint aux = 0;
+
+        if (!mm_get_uint_from_match_info (match_info, 1, &cid)) {
+            inner_error = g_error_new (MM_CORE_ERROR,
+                                       MM_CORE_ERROR_FAILED,
+                                       "Couldn't parse CID from reply: '%s'",
+                                       reply);
+            break;
+        }
+        if (!mm_get_uint_from_match_info (match_info, 2, &aux) || (aux != 0 && aux != 1)) {
+            inner_error = g_error_new (MM_CORE_ERROR,
+                                       MM_CORE_ERROR_FAILED,
+                                       "Couldn't parse context status from reply: '%s'",
+                                       reply);
+            break;
+        }
+
+        pdp_active = g_slice_new0 (MM3gppPdpContextActive);
+        pdp_active->cid = cid;
+        pdp_active->active = (gboolean) aux;
+        list = g_list_prepend (list, pdp_active);
+
+        g_match_info_next (match_info, &inner_error);
+    }
+
+    if (match_info)
+        g_match_info_free (match_info);
+    g_regex_unref (r);
+
+    if (inner_error) {
+        mm_3gpp_pdp_context_active_list_free (list);
+        g_propagate_error (error, inner_error);
+        g_prefix_error (error, "Couldn't properly parse list of active/inactive PDP contexts. ");
+        return NULL;
+    }
+
+    list = g_list_sort (list, (GCompareFunc) mm_3gpp_pdp_context_active_cmp);
+
+    return list;
+}