res_pjsip: Added "subscribe_context" to endpoint

If specified, incoming SUBSCRIBE requests will be searched for the matching
extension in the indicated context. If no "subscribe_context" is specified,
then the "context" setting is used.

ASTERISK-25471 #close

Change-Id: I3fb7a15f5bc154079bd348c08b7ad1cdd2d5e514

CHANGES

@@ -8,6 +8,17 @@
 ===
 ==============================================================================
 
+------------------------------------------------------------------------------
+--- Functionality changes from Asterisk 13.10.0 to Asterisk 13.11.0 ----------
+------------------------------------------------------------------------------
+
+res_pjsip
+------------------
+ * Added "subscribe_context" to endpoint.
+   If specified, incoming SUBSCRIBE requests will be searched for the matching
+   extension in the indicated context. If no "subscribe_context" is specified,
+   then the "context" setting is used.
+
 ------------------------------------------------------------------------------
 --- Functionality changes from Asterisk 13.9.0 to Asterisk 13.10.0 -----------
 ------------------------------------------------------------------------------

contrib/ast-db-manage/config/versions/9deac0ae4717_pjsip_add_subscribe_context.py

@@ -0,0 +1,21 @@
+"""pjsip_add_subscribe_context
+
+Revision ID: 9deac0ae4717
+Revises: ef7efc2d3964
+Create Date: 2016-07-04 12:11:28.117788
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '9deac0ae4717'
+down_revision = 'ef7efc2d3964'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    op.add_column('ps_endpoints', sa.Column('subscribe_context', sa.String(40)))
+
+def downgrade():
+    op.drop_column('ps_endpoints', 'subscribe_context')

include/asterisk/res_pjsip.h

@@ -503,6 +503,8 @@ struct ast_sip_endpoint_subscription_configuration {
 	unsigned int minexpiry;
 	/*! Message waiting configuration */
 	struct ast_sip_mwi_configuration mwi;
+	/* Context for SUBSCRIBE requests */
+	char context[AST_MAX_CONTEXT];
 };
 
 /*!

res/res_pjsip.c

@@ -897,6 +897,15 @@
 						mask with a slash ('/')
 					</para></description>
 				</configOption>
+				<configOption name="subscribe_context">
+					<synopsis>Context for incoming MESSAGE requests.</synopsis>
+					<description><para>
+						If specified, incoming SUBSCRIBE requests will be searched for the matching
+						extension in the indicated context.
+						If no <replaceable>subscribe_context</replaceable> is specified,
+						then the <replaceable>context</replaceable> setting is used.
+					</para></description>
+				</configOption>
 			</configObject>
 			<configObject name="auth">
 				<synopsis>Authentication type</synopsis>
@@ -1958,6 +1967,9 @@
 				<parameter name="ActiveChannels">
 					<para>The number of active channels associated with this endpoint.</para>
 				</parameter>
+				<parameter name="SubscribeContext">
+					<para><xi:include xpointer="xpointer(/docs/configInfo[@name='res_pjsip']/configFile[@name='pjsip.conf']/configObject[@name='endpoint']/configOption[@name='subscribe_context']/synopsis/node())"/></para>
+				</parameter>
 			</syntax>
 		</managerEventInstance>
 	</managerEvent>

res/res_pjsip/pjsip_configuration.c

@@ -1861,6 +1861,7 @@ int ast_res_pjsip_initialize_configuration(const struct ast_module_info *ast_mod
 	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "contact_deny", "", endpoint_acl_handler, NULL, NULL, 0, 0);
 	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "contact_permit", "", endpoint_acl_handler, NULL, NULL, 0, 0);
 	ast_sorcery_object_field_register_custom(sip_sorcery, "endpoint", "contact_acl", "", endpoint_acl_handler, contact_acl_to_str, NULL, 0, 0);
+	ast_sorcery_object_field_register(sip_sorcery, "endpoint", "subscribe_context", "", OPT_CHAR_ARRAY_T, 0, CHARFLDSET(struct ast_sip_endpoint, subscription.context));
 
 	if (ast_sip_initialize_sorcery_transport()) {
 		ast_log(LOG_ERROR, "Failed to register SIP transport support with sorcery\n");

res/res_pjsip_exten_state.c

@@ -352,9 +352,11 @@ static void subscription_shutdown(struct ast_sip_subscription *sub)
 static int new_subscribe(struct ast_sip_endpoint *endpoint,
 		const char *resource)
 {
-	if (!ast_exists_extension(NULL, endpoint->context, resource, PRIORITY_HINT, NULL)) {
+	const char *context = S_OR(endpoint->subscription.context, endpoint->context);
+
+	if (!ast_exists_extension(NULL, context, resource, PRIORITY_HINT, NULL)) {
 		ast_log(LOG_NOTICE, "Extension state subscription failed: Extension %s does not exist in context '%s' or has no associated hint\n",
-			resource, endpoint->context);
+			resource, context);
 		return 404;
 	}
 
@@ -372,7 +374,9 @@ static int subscription_established(struct ast_sip_subscription *sip_sub)
 		return -1;
 	}
 
-	ast_copy_string(exten_state_sub->context, endpoint->context, sizeof(exten_state_sub->context));
+	ast_copy_string(exten_state_sub->context,
+		S_OR(endpoint->subscription.context, endpoint->context),
+		sizeof(exten_state_sub->context));
 	ast_copy_string(exten_state_sub->exten, resource, sizeof(exten_state_sub->exten));
 
 	if ((exten_state_sub->id = ast_extension_state_add_destroy_extended(