res_pjsip: New endpoint option "notify_early_inuse_ringing"

This option was added to control whether to notify dialog-info state
'early' or 'confirmed' on Ringing when already INUSE.
The value "yes" is useful for some SIP phones (Cisco SPA)
to be able to indicate and pick up ringing devices.

ASTERISK-26919 #close

Change-Id: Ie050bc30023543c7dfb4365c5be3ce58c738c711

CHANGES

@@ -21,6 +21,10 @@ res_pjsip
    Some SIP phones like Mitel/Aastra or Snom keep the line busy until
    receive "200 OK".
 
+ * A new endpoint option "notify_early_inuse_ringing" was added to control
+   whether to notify dialog-info state 'early' or 'confirmed' on Ringing
+   when already INUSE.
+
 res_agi
 ------------------
  * The EAGI() application will now look for a dialplan variable named

configs/samples/pjsip.conf.sample

@@ -768,6 +768,11 @@
                        ; transfer (default: "yes"). The value "no" is useful
                        ; for some SIP phones (Mitel/Aastra, Snom) which expect
                        ; a sip/frag "200 OK" after REFER has been accepted.
+;notify_early_inuse_ringing = ; Whether to notifies dialog-info 'early'
+                              ; on INUSE && RINGING state (default: "no").
+                              ; The value "yes" is useful for some SIP phones
+                              ; (Cisco SPA) to be able to indicate and pick up
+                              ; ringing devices.
 
 ;==========================AUTH SECTION OPTIONS=========================
 ;[auth]

contrib/ast-db-manage/config/versions/d7983954dd96_add_ps_endpoints_notify_early_inuse_.py

@@ -0,0 +1,30 @@
+"""add ps_endpoints.notify_early_inuse_ringing
+
+Revision ID: d7983954dd96
+Revises: 86bb1efa278d
+Create Date: 2017-06-05 15:44:41.152280
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'd7983954dd96'
+down_revision = '86bb1efa278d'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects.postgresql import ENUM
+
+YESNO_NAME = 'yesno_values'
+YESNO_VALUES = ['yes', 'no']
+
+def upgrade():
+    ############################# Enums ##############################
+
+    # yesno_values have already been created, so use postgres enum object
+    # type to get around "already created" issue - works okay with mysql
+    yesno_values = ENUM(*YESNO_VALUES, name=YESNO_NAME, create_type=False)
+
+    op.add_column('ps_endpoints', sa.Column('notify_early_inuse_ringing', yesno_values))
+
+def downgrade():
+    op.drop_column('ps_endpoints', 'notify_early_inuse_ringing')

include/asterisk/res_pjsip.h

@@ -763,6 +763,8 @@ struct ast_sip_endpoint {
 	unsigned int allow_overlap;
 	/*! Whether to notifies all the progress details on blind transfer */
 	unsigned int refer_blind_progress;
+	/*! Whether to notifies dialog-info 'early' on INUSE && RINGING state */
+	unsigned int notify_early_inuse_ringing;
 };
 
 /*! URI parameter for symmetric transport */

include/asterisk/res_pjsip_presence_xml.h

@@ -69,7 +69,8 @@ void ast_sip_sanitize_xml(const char *input, char *output, size_t len);
  * \param[out] local_state
  */
 void ast_sip_presence_exten_state_to_str(int state, char **statestring,
-		char **pidfstate, char **pidfnote, enum ast_sip_pidf_state *local_state);
+		char **pidfstate, char **pidfnote, enum ast_sip_pidf_state *local_state,
+		unsigned int notify_early_inuse_ringing);
 
 /*!
  * \brief Create XML attribute

res/res_pjsip.c

@@ -965,6 +965,13 @@
 						will not send the progress details, but immediately will send "200 OK".
 					</para></description>
 				</configOption>
+				<configOption name="notify_early_inuse_ringing" default="no">
+					<synopsis>Whether to notifies dialog-info 'early' on InUse&amp;Ringing state</synopsis>
+					<description><para>
+						Control whether dialog-info subscriptions get 'early' state
+						on Ringing when already INUSE.
+					</para></description>
+				</configOption>
 			</configObject>
 			<configObject name="auth">
 				<synopsis>Authentication type</synopsis>

res/res_pjsip/pjsip_configuration.c

@@ -1941,6 +1941,7 @@ int ast_res_pjsip_initialize_configuration(const struct ast_module_info *ast_mod
 	ast_sorcery_object_field_register(sip_sorcery, "endpoint", "rtcp_mux", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, rtcp_mux));
 	ast_sorcery_object_field_register(sip_sorcery, "endpoint", "allow_overlap", "yes", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, allow_overlap));
 	ast_sorcery_object_field_register(sip_sorcery, "endpoint", "refer_blind_progress", "yes", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, refer_blind_progress));
+	ast_sorcery_object_field_register(sip_sorcery, "endpoint", "notify_early_inuse_ringing", "no", OPT_BOOL_T, 1, FLDSET(struct ast_sip_endpoint, notify_early_inuse_ringing));
 
 	if (ast_sip_initialize_sorcery_transport()) {
 		ast_log(LOG_ERROR, "Failed to register SIP transport support with sorcery\n");

res/res_pjsip/presence_xml.c

@@ -82,7 +82,8 @@ void ast_sip_sanitize_xml(const char *input, char *output, size_t len)
 }
 
 void ast_sip_presence_exten_state_to_str(int state, char **statestring, char **pidfstate,
-			       char **pidfnote, enum ast_sip_pidf_state *local_state)
+			       char **pidfnote, enum ast_sip_pidf_state *local_state,
+			       unsigned int notify_early_inuse_ringing)
 {
 	switch (state) {
 	case AST_EXTENSION_RINGING:
@@ -92,7 +93,11 @@ void ast_sip_presence_exten_state_to_str(int state, char **statestring, char **p
 		*pidfnote = "Ringing";
 		break;
 	case (AST_EXTENSION_INUSE | AST_EXTENSION_RINGING):
-		*statestring = "confirmed";
+		if (notify_early_inuse_ringing) {
+			*statestring = "early";
+		} else {
+			*statestring = "confirmed";
+		}
 		*local_state = NOTIFY_INUSE;
 		*pidfstate = "busy";
 		*pidfnote = "Ringing";

res/res_pjsip_dialog_info_body_generator.c

@@ -107,6 +107,8 @@ static int dialog_info_generate_body_content(void *body, void *data)
 	enum ast_sip_pidf_state local_state;
 	unsigned int version;
 	char version_str[32], sanitized[PJSIP_MAX_URL_SIZE];
+	struct ast_sip_endpoint *endpoint = NULL;
+	unsigned int notify_early_inuse_ringing = 0;
 
 	if (!local || !state_data->sub) {
 		return -1;
@@ -120,8 +122,12 @@ static int dialog_info_generate_body_content(void *body, void *data)
 	stripped = ast_strip_quoted(local, "<", ">");
 	ast_sip_sanitize_xml(stripped, sanitized, sizeof(sanitized));
 
+	if (state_data->sub && (endpoint = ast_sip_subscription_get_endpoint(state_data->sub))) {
+	    notify_early_inuse_ringing = endpoint->notify_early_inuse_ringing;
+	    ao2_cleanup(endpoint);
+	}
 	ast_sip_presence_exten_state_to_str(state_data->exten_state, &statestring,
-			&pidfstate, &pidfnote, &local_state);
+			&pidfstate, &pidfnote, &local_state, notify_early_inuse_ringing);
 
 	ast_sip_presence_xml_create_attr(state_data->pool, dialog_info, "xmlns", "urn:ietf:params:xml:ns:dialog-info");
 
@@ -133,7 +139,7 @@ static int dialog_info_generate_body_content(void *body, void *data)
 
 	dialog = ast_sip_presence_xml_create_node(state_data->pool, dialog_info, "dialog");
 	ast_sip_presence_xml_create_attr(state_data->pool, dialog, "id", state_data->exten);
-	if (state_data->exten_state == AST_EXTENSION_RINGING) {
+	if (!ast_strlen_zero(statestring) && !strcmp(statestring, "early")) {
 		ast_sip_presence_xml_create_attr(state_data->pool, dialog, "direction", "recipient");
 	}
 

res/res_pjsip_pidf_body_generator.c

@@ -58,7 +58,7 @@ static int pidf_generate_body_content(void *body, void *data)
 	struct ast_sip_exten_state_data *state_data = data;
 
 	ast_sip_presence_exten_state_to_str(state_data->exten_state, &statestring,
-			&pidfstate, &pidfnote, &local_state);
+			&pidfstate, &pidfnote, &local_state, 0);
 
 	if (!pjpidf_pres_add_note(state_data->pool, pres, pj_cstr(&note, pidfnote))) {
 		ast_log(LOG_WARNING, "Unable to add note to PIDF presence\n");

res/res_pjsip_pidf_eyebeam_body_supplement.c

@@ -80,7 +80,7 @@ static int pidf_supplement_body(void *body, void *data)
 	enum ast_sip_pidf_state local_state;
 
 	ast_sip_presence_exten_state_to_str(state_data->exten_state, &statestring,
-			&pidfstate, &pidfnote, &local_state);
+			&pidfstate, &pidfnote, &local_state, 0);
 
 	add_eyebeam(state_data->pool, pres, pidfstate);
 	return 0;

res/res_pjsip_xpidf_body_generator.c

@@ -63,7 +63,7 @@ static int xpidf_generate_body_content(void *body, void *data)
 	pj_xml_node *msnsubstatus;
 
 	ast_sip_presence_exten_state_to_str(state_data->exten_state, &statestring,
-			&pidfstate, &pidfnote, &local_state);
+			&pidfstate, &pidfnote, &local_state, 0);
 
 	ast_sip_presence_xml_find_node_attr(state_data->pool, pres, "atom", "id",
 			&atom, &attr);