[MM] [PATCH] bearer: allow specifying default IP family for bearers

[Ben Chan <benchan chromium org>]

This patch adds a 'bearer-default-ip-family' property to MMBearer, which
specifies the default IP family to use for a bearer when no explicit
value is given via the simple connect properties. The default IP family
is set to IPv4 in MMBearer but can be overridden by a MMBearer subclass,
which allows a modem plugin to specify an appropriate default value.
---
 libmm-glib/mm-bearer-properties.c |  8 +-------
 src/mm-bearer.c                   | 25 +++++++++++++++++++++++++
 src/mm-bearer.h                   |  2 ++
 src/mm-broadband-bearer.c         | 25 +++++++++++++++++++++----
 4 files changed, 49 insertions(+), 11 deletions(-)

diff --git a/libmm-glib/mm-bearer-properties.c b/libmm-glib/mm-bearer-properties.c
index 6526ed0..2f59fee 100644
--- a/libmm-glib/mm-bearer-properties.c
+++ b/libmm-glib/mm-bearer-properties.c
@@ -674,13 +674,7 @@ mm_bearer_properties_init (MMBearerProperties *self)
     self->priv->allow_roaming = TRUE;
     self->priv->rm_protocol = MM_MODEM_CDMA_RM_PROTOCOL_UNKNOWN;
     self->priv->allowed_auth = MM_BEARER_ALLOWED_AUTH_UNKNOWN;
-
-    /* At some point in the future, this default should probably be changed
-     * to IPV4V6. However, presently support for this PDP type is rare. An
-     * even better approach would likely be to query which PDP types the
-     * modem supports (using AT+CGDCONT=?), and set the default accordingly
-     */
-    self->priv->ip_type = MM_BEARER_IP_FAMILY_IPV4;
+    self->priv->ip_type = MM_BEARER_IP_FAMILY_UNKNOWN;
 }
 
 static void
diff --git a/src/mm-bearer.c b/src/mm-bearer.c
index 9e96bde..d047e11 100644
--- a/src/mm-bearer.c
+++ b/src/mm-bearer.c
@@ -57,6 +57,7 @@ enum {
     PROP_MODEM,
     PROP_STATUS,
     PROP_CONFIG,
+    PROP_DEFAULT_IP_FAMILY,
     PROP_LAST
 };
 
@@ -73,6 +74,8 @@ struct _MMBearerPrivate {
     MMBearerStatus status;
     /* Configuration of the bearer */
     MMBearerProperties *config;
+    /* Default IP family of this bearer */
+    MMBearerIpFamily default_ip_family;
 
     /* Cancellable for connect() */
     GCancellable *connect_cancellable;
@@ -844,6 +847,12 @@ mm_bearer_get_config (MMBearer *self)
             NULL);
 }
 
+MMBearerIpFamily
+mm_bearer_get_default_ip_family (MMBearer *self)
+{
+    return self->priv->default_ip_family;
+}
+
 /*****************************************************************************/
 
 static void
@@ -969,6 +978,9 @@ set_property (GObject *object,
             g_variant_unref (dictionary);
         break;
     }
+    case PROP_DEFAULT_IP_FAMILY:
+        self->priv->default_ip_family = g_value_get_enum (value);
+        break;
     default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
@@ -999,6 +1011,9 @@ get_property (GObject *object,
     case PROP_CONFIG:
         g_value_set_object (value, self->priv->config);
         break;
+    case PROP_DEFAULT_IP_FAMILY:
+        g_value_set_enum (value, self->priv->default_ip_family);
+        break;
     default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
         break;
@@ -1015,6 +1030,7 @@ mm_bearer_init (MMBearer *self)
     self->priv->status = MM_BEARER_STATUS_DISCONNECTED;
     self->priv->reason_3gpp = CONNECTION_FORBIDDEN_REASON_NONE;
     self->priv->reason_cdma = CONNECTION_FORBIDDEN_REASON_NONE;
+    self->priv->default_ip_family = MM_BEARER_IP_FAMILY_IPV4;
 
     /* Set defaults */
     mm_gdbus_bearer_set_interface (MM_GDBUS_BEARER (self), NULL);
@@ -1111,6 +1127,15 @@ mm_bearer_class_init (MMBearerClass *klass)
                              MM_TYPE_BEARER_PROPERTIES,
                              G_PARAM_READWRITE);
     g_object_class_install_property (object_class, PROP_CONFIG, properties[PROP_CONFIG]);
+
+    properties[PROP_DEFAULT_IP_FAMILY] =
+        g_param_spec_enum (MM_BEARER_DEFAULT_IP_FAMILY,
+                           "Bearer default IP family",
+                           "IP family to use for this bearer when no IP family is specified",
+                           MM_TYPE_BEARER_IP_FAMILY,
+                           MM_BEARER_IP_FAMILY_IPV4,
+                           G_PARAM_READWRITE);
+    g_object_class_install_property (object_class, PROP_DEFAULT_IP_FAMILY, 
properties[PROP_DEFAULT_IP_FAMILY]);
 }
 
 /*****************************************************************************/
diff --git a/src/mm-bearer.h b/src/mm-bearer.h
index c617297..cc71bfd 100644
--- a/src/mm-bearer.h
+++ b/src/mm-bearer.h
@@ -58,6 +58,7 @@ typedef struct _MMBearerPrivate MMBearerPrivate;
 #define MM_BEARER_MODEM      "bearer-modem"
 #define MM_BEARER_STATUS     "bearer-status"
 #define MM_BEARER_CONFIG     "bearer-config"
+#define MM_BEARER_DEFAULT_IP_FAMILY "bearer-deafult-ip-family"
 
 typedef enum { /*< underscore_name=mm_bearer_status >*/
     MM_BEARER_STATUS_DISCONNECTED,
@@ -103,6 +104,7 @@ const gchar        *mm_bearer_get_path    (MMBearer *bearer);
 MMBearerStatus      mm_bearer_get_status  (MMBearer *bearer);
 MMBearerProperties *mm_bearer_peek_config (MMBearer *self);
 MMBearerProperties *mm_bearer_get_config  (MMBearer *self);
+MMBearerIpFamily mm_bearer_get_default_ip_family (MMBearer *self);
 
 
 void     mm_bearer_connect        (MMBearer *self,
diff --git a/src/mm-broadband-bearer.c b/src/mm-broadband-bearer.c
index f380289..ebe48ea 100644
--- a/src/mm-broadband-bearer.c
+++ b/src/mm-broadband-bearer.c
@@ -68,6 +68,18 @@ mm_broadband_bearer_get_3gpp_cid (MMBroadbandBearer *self)
     return self->priv->cid;
 }
 
+static MMBearerIpFamily
+mm_broadband_bearer_get_ip_family (MMBroadbandBearer *self)
+{
+    MMBearerIpFamily ip_family;
+
+    ip_family = mm_bearer_properties_get_ip_type (mm_bearer_peek_config (MM_BEARER (self)));
+    if (ip_family != MM_BEARER_IP_FAMILY_UNKNOWN)
+        return ip_family;
+
+    return mm_bearer_get_default_ip_family (MM_BEARER (self));
+}
+
 /*****************************************************************************/
 /* Detailed connect context, used in both CDMA and 3GPP sequences */
 
@@ -772,7 +784,7 @@ find_cid_ready (MMBaseModem *modem,
         return;
 
     /* Initialize PDP context with our APN */
-    pdp_type = mm_3gpp_get_pdp_type_from_ip_family (mm_bearer_properties_get_ip_type (mm_bearer_peek_config 
(MM_BEARER (ctx->self))));
+    pdp_type = mm_3gpp_get_pdp_type_from_ip_family (mm_broadband_bearer_get_ip_family (ctx->self));
     if (!pdp_type) {
         g_simple_async_result_set_error (ctx->result,
                                          MM_CORE_ERROR,
@@ -838,6 +850,9 @@ parse_cid_range (MMBaseModem *modem,
                      G_REGEX_DOLLAR_ENDONLY | G_REGEX_RAW,
                      0, &inner_error);
     if (r) {
+        MMBearerIpFamily ip_family;
+
+        ip_family = mm_broadband_bearer_get_ip_family (ctx->self);
         g_regex_match_full (r, response, strlen (response), 0, 0, &match_info, &inner_error);
         cid = 0;
         while (!inner_error &&
@@ -847,8 +862,7 @@ parse_cid_range (MMBaseModem *modem,
 
             pdp_type = g_match_info_fetch (match_info, 3);
 
-            if (mm_3gpp_get_ip_family_from_pdp_type (pdp_type) ==
-                mm_bearer_properties_get_ip_type (mm_bearer_peek_config (MM_BEARER (ctx->self)))) {
+            if (mm_3gpp_get_ip_family_from_pdp_type (pdp_type) == ip_family) {
                 gchar *max_cid_range_str;
                 guint max_cid_range;
 
@@ -900,6 +914,7 @@ parse_pdp_list (MMBaseModem *modem,
     GList *pdp_list;
     GList *l;
     guint cid;
+    MMBearerIpFamily ip_family;
 
     /* If cancelled, set result error */
     if (detailed_connect_context_set_error_if_cancelled (ctx, result_error))
@@ -938,11 +953,13 @@ parse_pdp_list (MMBaseModem *modem,
                 pdp->apn ? pdp->apn : "");
     }
 
+    ip_family = mm_broadband_bearer_get_ip_family (ctx->self);
+
     /* Look for the exact PDP context we want */
     for (l = pdp_list; l; l = g_list_next (l)) {
         MM3gppPdpContext *pdp = l->data;
 
-        if (pdp->pdp_type == mm_bearer_properties_get_ip_type (mm_bearer_peek_config (MM_BEARER 
(ctx->self)))) {
+        if (pdp->pdp_type == ip_family) {
             /* PDP with no APN set? we may use that one if not exact match found */
             if (!pdp->apn || !pdp->apn[0]) {
                 mm_dbg ("Found PDP context with CID %u and no APN",
-- 
1.8.2.1