child-sa: replace get_traffic_selectors() with create_ts_enumerator()

Not directly returning a linked list allows us to change the internals of
the CHILD_SA transparently.

src/libcharon/plugins/farp/farp_listener.c

@@ -58,19 +58,30 @@ METHOD(listener_t, child_updown, bool,
 	bool up)
 {
 	enumerator_t *enumerator;
+	traffic_selector_t *ts;
 	entry_t *entry;
 
 	if (up)
 	{
 		INIT(entry,
-			.local = child_sa->get_traffic_selectors(child_sa, TRUE),
-			.remote = child_sa->get_traffic_selectors(child_sa, FALSE),
+			.local = linked_list_create(),
+			.remote = linked_list_create(),
 			.reqid = child_sa->get_reqid(child_sa),
 		);
-		entry->local = entry->local->clone_offset(entry->local,
-										offsetof(traffic_selector_t, clone));
-		entry->remote = entry->remote->clone_offset(entry->remote,
-										offsetof(traffic_selector_t, clone));
+
+		enumerator = child_sa->create_ts_enumerator(child_sa, TRUE);
+		while (enumerator->enumerate(enumerator, &ts))
+		{
+			entry->local->insert_last(entry->local, ts->clone(ts));
+		}
+		enumerator->destroy(enumerator);
+
+		enumerator = child_sa->create_ts_enumerator(child_sa, FALSE);
+		while (enumerator->enumerate(enumerator, &ts))
+		{
+			entry->remote->insert_last(entry->remote, ts->clone(ts));
+		}
+		enumerator->destroy(enumerator);
 
 		this->lock->write_lock(this->lock);
 		this->entries->insert_last(this->entries, entry);
@@ -160,4 +171,3 @@ farp_listener_t *farp_listener_create()
 
 	return &this->public;
 }
-

src/libcharon/plugins/ha/ha_child.c

@@ -103,18 +103,22 @@ METHOD(listener_t, child_keys, bool,
 		chunk_clear(&secret);
 	}
 
-	local_ts = child_sa->get_traffic_selectors(child_sa, TRUE);
-	enumerator = local_ts->create_enumerator(local_ts);
+	local_ts = linked_list_create();
+	remote_ts = linked_list_create();
+
+	enumerator = child_sa->create_ts_enumerator(child_sa, TRUE);
 	while (enumerator->enumerate(enumerator, &ts))
 	{
 		m->add_attribute(m, HA_LOCAL_TS, ts);
+		local_ts->insert_last(local_ts, ts);
 	}
 	enumerator->destroy(enumerator);
-	remote_ts = child_sa->get_traffic_selectors(child_sa, FALSE);
-	enumerator = remote_ts->create_enumerator(remote_ts);
+
+	enumerator = child_sa->create_ts_enumerator(child_sa, FALSE);
 	while (enumerator->enumerate(enumerator, &ts))
 	{
 		m->add_attribute(m, HA_REMOTE_TS, ts);
+		remote_ts->insert_last(remote_ts, ts);
 	}
 	enumerator->destroy(enumerator);
 
@@ -128,6 +132,9 @@ METHOD(listener_t, child_keys, bool,
 		seg_i, this->segments->is_active(this->segments, seg_i) ? "*" : "",
 		seg_o, this->segments->is_active(this->segments, seg_o) ? "*" : "");
 
+	local_ts->destroy(local_ts);
+	remote_ts->destroy(remote_ts);
+
 	this->socket->push(this->socket, m);
 	m->destroy(m);
 
@@ -195,4 +202,3 @@ ha_child_t *ha_child_create(ha_socket_t *socket, ha_tunnel_t *tunnel,
 
 	return &this->public;
 }
-

src/libcharon/plugins/smp/smp.c

@@ -165,8 +165,10 @@ static void write_childend(xmlTextWriterPtr writer, child_sa_t *child, bool loca
 
 	xmlTextWriterWriteFormatElement(writer, "spi", "%x",
 									htonl(child->get_spi(child, local)));
-	list = child->get_traffic_selectors(child, local);
+	list = linked_list_create_from_enumerator(
+									child->create_ts_enumerator(child, local));
 	write_networks(writer, "networks", list);
+	list->destroy(list);
 }
 
 /**

src/libcharon/plugins/stroke/stroke_list.c

@@ -207,8 +207,10 @@ static void log_child_sa(FILE *out, child_sa_t *child_sa, bool all)
 	time_t use_in, use_out, rekey, now;
 	u_int64_t bytes_in, bytes_out, packets_in, packets_out;
 	proposal_t *proposal;
-	child_cfg_t *config = child_sa->get_config(child_sa);
+	linked_list_t *my_ts, *other_ts;
+	child_cfg_t *config;
 
+	config = child_sa->get_config(child_sa);
 	now = time_monotonic(NULL);
 
 	fprintf(out, "%12s{%d}:  %N, %N%s",
@@ -319,10 +321,15 @@ static void log_child_sa(FILE *out, child_sa_t *child_sa, bool all)
 		fprintf(out, ", expires in %V", &now, &rekey);
 	}
 
+	my_ts = linked_list_create_from_enumerator(
+							child_sa->create_ts_enumerator(child_sa, TRUE));
+	other_ts = linked_list_create_from_enumerator(
+							child_sa->create_ts_enumerator(child_sa, FALSE));
 	fprintf(out, "\n%12s{%d}:   %#R=== %#R\n",
 			child_sa->get_name(child_sa), child_sa->get_reqid(child_sa),
-			child_sa->get_traffic_selectors(child_sa, TRUE),
-			child_sa->get_traffic_selectors(child_sa, FALSE));
+			my_ts, other_ts);
+	my_ts->destroy(my_ts);
+	other_ts->destroy(other_ts);
 }
 
 /**

src/libcharon/plugins/uci/uci_control.c

@@ -72,6 +72,7 @@ static void write_fifo(private_uci_control_t *this, char *format, ...)
 static void status(private_uci_control_t *this, char *name)
 {
 	enumerator_t *configs, *sas, *children;
+	linked_list_t *list;
 	ike_sa_t *ike_sa;
 	child_sa_t *child_sa;
 	peer_cfg_t *peer_cfg;
@@ -108,8 +109,10 @@ static void status(private_uci_control_t *this, char *name)
 			children = ike_sa->create_child_sa_enumerator(ike_sa);
 			while (children->enumerate(children, (void**)&child_sa))
 			{
-				fprintf(out, "%#R",
-						child_sa->get_traffic_selectors(child_sa, FALSE));
+				list = linked_list_create_from_enumerator(
+							child_sa->create_ts_enumerator(child_sa, FALSE));
+				fprintf(out, "%#R", list);
+				list->destroy(list);
 			}
 			children->destroy(children);
 			fprintf(out, "\n");
@@ -296,4 +299,3 @@ uci_control_t *uci_control_create()
 	}
 	return &this->public;
 }
-

src/libcharon/sa/child_sa.c

@@ -331,10 +331,14 @@ METHOD(child_sa_t, set_proposal, void,
 	this->proposal = proposal->clone(proposal);
 }
 
-METHOD(child_sa_t, get_traffic_selectors, linked_list_t*,
-	   private_child_sa_t *this, bool local)
+METHOD(child_sa_t, create_ts_enumerator, enumerator_t*,
+	private_child_sa_t *this, bool local)
 {
-	return local ? this->my_ts : this->other_ts;
+	if (local)
+	{
+		return this->my_ts->create_enumerator(this->my_ts);
+	}
+	return this->other_ts->create_enumerator(this->other_ts);
 }
 
 typedef struct policy_enumerator_t policy_enumerator_t;
@@ -1117,7 +1121,7 @@ child_sa_t * child_sa_create(host_t *me, host_t* other,
 			.install = _install,
 			.update = _update,
 			.add_policies = _add_policies,
-			.get_traffic_selectors = _get_traffic_selectors,
+			.create_ts_enumerator = _create_ts_enumerator,
 			.create_policy_enumerator = _create_policy_enumerator,
 			.destroy = _destroy,
 		},

src/libcharon/sa/child_sa.h

@@ -284,17 +284,20 @@ struct child_sa_t {
 	mark_t (*get_mark)(child_sa_t *this, bool inbound);
 
 	/**
-	 * Get the traffic selectors list added for one side.
+	 * Create an enumerator over traffic selectors of one side.
 	 *
-	 * @param local		TRUE for own traffic selectors, FALSE for remote
-	 * @return			list of traffic selectors
+	 * @param local		TRUE for own traffic selectors, FALSE for remote.
+	 * @return			enumerator over traffic_selector_t*
 	 */
-	linked_list_t* (*get_traffic_selectors) (child_sa_t *this, bool local);
+	enumerator_t* (*create_ts_enumerator)(child_sa_t *this, bool local);
 
 	/**
 	 * Create an enumerator over installed policies.
 	 *
-	 * @return			enumerator over pairs of traffic selectors.
+	 * The enumerated traffic selectors is a full mesh of compatible local
+	 * and remote traffic selectors.
+	 *
+	 * @return			enumerator over a pair of traffic_selector_t*
 	 */
 	enumerator_t* (*create_policy_enumerator)(child_sa_t *this);
 

src/libcharon/sa/ikev1/task_manager_v1.c

@@ -1753,21 +1753,22 @@ METHOD(task_manager_t, queue_child, void,
 /**
  * Check if two CHILD_SAs have the same traffic selector
  */
-static bool have_equal_ts(child_sa_t *a, child_sa_t *b, bool local)
+static bool have_equal_ts(child_sa_t *child1, child_sa_t *child2, bool local)
 {
-	linked_list_t *list;
-	traffic_selector_t *ts_a, *ts_b;
+	enumerator_t *e1, *e2;
+	traffic_selector_t *ts1, *ts2;
+	bool equal = FALSE;
 
-	list = a->get_traffic_selectors(a, local);
-	if (list->get_first(list, (void**)&ts_a) == SUCCESS)
+	e1 = child1->create_ts_enumerator(child1, local);
+	e2 = child2->create_ts_enumerator(child2, local);
+	if (e1->enumerate(e1, &ts1) && e2->enumerate(e2, &ts2))
 	{
-		list = b->get_traffic_selectors(b, local);
-		if (list->get_first(list, (void**)&ts_b) == SUCCESS)
-		{
-			return ts_a->equals(ts_a, ts_b);
-		}
+		equal = ts1->equals(ts1, ts2);
 	}
-	return FALSE;
+	e1->destroy(e1);
+	e1->destroy(e1);
+
+	return equal;
 }
 
 /**
@@ -1806,14 +1807,13 @@ static bool is_redundant(private_task_manager_t *this, child_sa_t *child_sa)
 static traffic_selector_t* get_first_ts(child_sa_t *child_sa, bool local)
 {
 	traffic_selector_t *ts = NULL;
-	linked_list_t *list;
+	enumerator_t *enumerator;
 
-	list = child_sa->get_traffic_selectors(child_sa, local);
-	if (list->get_first(list, (void**)&ts) == SUCCESS)
-	{
-		return ts;
-	}
-	return NULL;
+	enumerator = child_sa->create_ts_enumerator(child_sa, local);
+	enumerator->enumerate(enumerator, &ts);
+	enumerator->destroy(enumerator);
+
+	return ts;
 }
 
 METHOD(task_manager_t, queue_child_rekey, void,

src/libcharon/sa/ikev1/tasks/quick_delete.c

@@ -69,6 +69,7 @@ static bool delete_child(private_quick_delete_t *this,
 {
 	u_int64_t bytes_in, bytes_out;
 	child_sa_t *child_sa;
+	linked_list_t *my_ts, *other_ts;
 	bool rekeyed;
 
 	child_sa = this->ike_sa->get_child_sa(this->ike_sa, protocol, spi, TRUE);
@@ -85,15 +86,17 @@ static bool delete_child(private_quick_delete_t *this,
 	rekeyed = child_sa->get_state(child_sa) == CHILD_REKEYING;
 	child_sa->set_state(child_sa, CHILD_DELETING);
 
+	my_ts = linked_list_create_from_enumerator(
+							child_sa->create_ts_enumerator(child_sa, TRUE));
+	other_ts = linked_list_create_from_enumerator(
+							child_sa->create_ts_enumerator(child_sa, FALSE));
 	if (this->expired)
 	{
 		DBG0(DBG_IKE, "closing expired CHILD_SA %s{%d} "
 			 "with SPIs %.8x_i %.8x_o and TS %#R=== %#R",
 			 child_sa->get_name(child_sa), child_sa->get_reqid(child_sa),
 			 ntohl(child_sa->get_spi(child_sa, TRUE)),
-			 ntohl(child_sa->get_spi(child_sa, FALSE)),
-			 child_sa->get_traffic_selectors(child_sa, TRUE),
-			 child_sa->get_traffic_selectors(child_sa, FALSE));
+			 ntohl(child_sa->get_spi(child_sa, FALSE)), my_ts, other_ts);
 	}
 	else
 	{
@@ -105,9 +108,10 @@ static bool delete_child(private_quick_delete_t *this,
 			 child_sa->get_name(child_sa), child_sa->get_reqid(child_sa),
 			 ntohl(child_sa->get_spi(child_sa, TRUE)), bytes_in,
 			 ntohl(child_sa->get_spi(child_sa, FALSE)), bytes_out,
-			 child_sa->get_traffic_selectors(child_sa, TRUE),
-			 child_sa->get_traffic_selectors(child_sa, FALSE));
+			 my_ts, other_ts);
 	}
+	my_ts->destroy(my_ts);
+	other_ts->destroy(other_ts);
 
 	if (!rekeyed)
 	{

src/libcharon/sa/ikev1/tasks/quick_mode.c

@@ -259,7 +259,7 @@ static bool install(private_quick_mode_t *this)
 {
 	status_t status, status_i, status_o;
 	chunk_t encr_i, encr_r, integ_i, integ_r;
-	linked_list_t *tsi, *tsr;
+	linked_list_t *tsi, *tsr, *my_ts, *other_ts;
 	child_sa_t *old = NULL;
 
 	this->child_sa->set_proposal(this->child_sa, this->proposal);
@@ -362,14 +362,20 @@ static bool install(private_quick_mode_t *this)
 	this->child_sa->set_state(this->child_sa, CHILD_INSTALLED);
 	this->ike_sa->add_child_sa(this->ike_sa, this->child_sa);
 
+	my_ts = linked_list_create_from_enumerator(
+				this->child_sa->create_ts_enumerator(this->child_sa, TRUE));
+	other_ts = linked_list_create_from_enumerator(
+				this->child_sa->create_ts_enumerator(this->child_sa, FALSE));
+
 	DBG0(DBG_IKE, "CHILD_SA %s{%d} established "
 		 "with SPIs %.8x_i %.8x_o and TS %#R=== %#R",
 		 this->child_sa->get_name(this->child_sa),
 		 this->child_sa->get_reqid(this->child_sa),
 		 ntohl(this->child_sa->get_spi(this->child_sa, TRUE)),
-		 ntohl(this->child_sa->get_spi(this->child_sa, FALSE)),
-		 this->child_sa->get_traffic_selectors(this->child_sa, TRUE),
-		 this->child_sa->get_traffic_selectors(this->child_sa, FALSE));
+		 ntohl(this->child_sa->get_spi(this->child_sa, FALSE)), my_ts, other_ts);
+
+	my_ts->destroy(my_ts);
+	other_ts->destroy(other_ts);
 
 	if (this->rekey)
 	{

src/libcharon/sa/ikev2/tasks/child_create.c

@@ -673,6 +673,22 @@ static status_t select_and_install(private_child_create_t *this,
 	{	/* a rekeyed SA uses the same reqid, no need for a new job */
 		schedule_inactivity_timeout(this);
 	}
+
+	my_ts = linked_list_create_from_enumerator(
+				this->child_sa->create_ts_enumerator(this->child_sa, TRUE));
+	other_ts = linked_list_create_from_enumerator(
+				this->child_sa->create_ts_enumerator(this->child_sa, FALSE));
+
+	DBG0(DBG_IKE, "CHILD_SA %s{%d} established "
+		 "with SPIs %.8x_i %.8x_o and TS %#R=== %#R",
+		 this->child_sa->get_name(this->child_sa),
+		 this->child_sa->get_reqid(this->child_sa),
+		 ntohl(this->child_sa->get_spi(this->child_sa, TRUE)),
+		 ntohl(this->child_sa->get_spi(this->child_sa, FALSE)), my_ts, other_ts);
+
+	my_ts->destroy(my_ts);
+	other_ts->destroy(other_ts);
+
 	return SUCCESS;
 }
 
@@ -1245,15 +1261,6 @@ METHOD(task_t, build_r, status_t,
 
 	build_payloads(this, message);
 
-	DBG0(DBG_IKE, "CHILD_SA %s{%d} established "
-		 "with SPIs %.8x_i %.8x_o and TS %#R=== %#R",
-		 this->child_sa->get_name(this->child_sa),
-		 this->child_sa->get_reqid(this->child_sa),
-		 ntohl(this->child_sa->get_spi(this->child_sa, TRUE)),
-		 ntohl(this->child_sa->get_spi(this->child_sa, FALSE)),
-		 this->child_sa->get_traffic_selectors(this->child_sa, TRUE),
-		 this->child_sa->get_traffic_selectors(this->child_sa, FALSE));
-
 	if (!this->rekey)
 	{	/* invoke the child_up() hook if we are not rekeying */
 		charon->bus->child_updown(charon->bus, this->child_sa, TRUE);
@@ -1431,15 +1438,6 @@ METHOD(task_t, process_i, status_t,
 
 	if (select_and_install(this, no_dh, ike_auth) == SUCCESS)
 	{
-		DBG0(DBG_IKE, "CHILD_SA %s{%d} established "
-			 "with SPIs %.8x_i %.8x_o and TS %#R=== %#R",
-			 this->child_sa->get_name(this->child_sa),
-			 this->child_sa->get_reqid(this->child_sa),
-			 ntohl(this->child_sa->get_spi(this->child_sa, TRUE)),
-			 ntohl(this->child_sa->get_spi(this->child_sa, FALSE)),
-			 this->child_sa->get_traffic_selectors(this->child_sa, TRUE),
-			 this->child_sa->get_traffic_selectors(this->child_sa, FALSE));
-
 		if (!this->rekey)
 		{	/* invoke the child_up() hook if we are not rekeying */
 			charon->bus->child_updown(charon->bus, this->child_sa, TRUE);

src/libcharon/sa/ikev2/tasks/child_delete.c

@@ -249,6 +249,7 @@ static status_t destroy_and_reestablish(private_child_delete_t *this)
  */
 static void log_children(private_child_delete_t *this)
 {
+	linked_list_t *my_ts, *other_ts;
 	enumerator_t *enumerator;
 	child_sa_t *child_sa;
 	u_int64_t bytes_in, bytes_out;
@@ -256,15 +257,17 @@ static void log_children(private_child_delete_t *this)
 	enumerator = this->child_sas->create_enumerator(this->child_sas);
 	while (enumerator->enumerate(enumerator, (void**)&child_sa))
 	{
+		my_ts = linked_list_create_from_enumerator(
+							child_sa->create_ts_enumerator(child_sa, TRUE));
+		other_ts = linked_list_create_from_enumerator(
+							child_sa->create_ts_enumerator(child_sa, FALSE));
 		if (this->expired)
 		{
 			DBG0(DBG_IKE, "closing expired CHILD_SA %s{%d} "
 				 "with SPIs %.8x_i %.8x_o and TS %#R=== %#R",
 				 child_sa->get_name(child_sa), child_sa->get_reqid(child_sa),
 				 ntohl(child_sa->get_spi(child_sa, TRUE)),
-				 ntohl(child_sa->get_spi(child_sa, FALSE)),
-				 child_sa->get_traffic_selectors(child_sa, TRUE),
-				 child_sa->get_traffic_selectors(child_sa, FALSE));
+				 ntohl(child_sa->get_spi(child_sa, FALSE)), my_ts, other_ts);
 		}
 		else
 		{
@@ -276,9 +279,10 @@ static void log_children(private_child_delete_t *this)
 				 child_sa->get_name(child_sa), child_sa->get_reqid(child_sa),
 				 ntohl(child_sa->get_spi(child_sa, TRUE)), bytes_in,
 				 ntohl(child_sa->get_spi(child_sa, FALSE)), bytes_out,
-				 child_sa->get_traffic_selectors(child_sa, TRUE),
-				 child_sa->get_traffic_selectors(child_sa, FALSE));
+				 my_ts, other_ts);
 		}
+		my_ts->destroy(my_ts);
+		other_ts->destroy(other_ts);
 	}
 	enumerator->destroy(enumerator);
 }