Use distinct message types for HA message ID updates

src/libcharon/plugins/ha/ha_dispatcher.c

@@ -265,12 +265,6 @@ static void process_ike_update(private_ha_dispatcher_t *this,
 				set_condition(ike_sa, value.u32, COND_CERTREQ_SEEN);
 				set_condition(ike_sa, value.u32, COND_ORIGINAL_INITIATOR);
 				break;
-			case HA_INITIATE_MID:
-				ike_sa->set_message_id(ike_sa, TRUE, value.u32);
-				break;
-			case HA_RESPOND_MID:
-				ike_sa->set_message_id(ike_sa, FALSE, value.u32);
-				break;
 			default:
 				break;
 		}
@@ -288,6 +282,46 @@ static void process_ike_update(private_ha_dispatcher_t *this,
 	}
 }
 
+/**
+ * Process messages of type IKE_MID_INITIATOR/RESPONDER
+ */
+static void process_ike_mid(private_ha_dispatcher_t *this,
+							   ha_message_t *message, bool initiator)
+{
+	ha_message_attribute_t attribute;
+	ha_message_value_t value;
+	enumerator_t *enumerator;
+	ike_sa_t *ike_sa = NULL;
+	u_int32_t mid = 0;
+
+	enumerator = message->create_attribute_enumerator(message);
+	while (enumerator->enumerate(enumerator, &attribute, &value))
+	{
+		switch (attribute)
+		{
+			case HA_IKE_ID:
+				ike_sa = charon->ike_sa_manager->checkout(charon->ike_sa_manager,
+														  value.ike_sa_id);
+				break;
+			case HA_MID:
+				mid = value.u32;
+				break;
+			default:
+				break;
+		}
+	}
+	enumerator->destroy(enumerator);
+
+	if (ike_sa)
+	{
+		if (mid)
+		{
+			ike_sa->set_message_id(ike_sa, initiator, mid);
+		}
+		charon->ike_sa_manager->checkin(charon->ike_sa_manager, ike_sa);
+	}
+}
+
 /**
  * Process messages of type IKE_DELETE
  */
@@ -676,6 +710,12 @@ static job_requeue_t dispatch(private_ha_dispatcher_t *this)
 		case HA_IKE_UPDATE:
 			process_ike_update(this, message);
 			break;
+		case HA_IKE_MID_INITIATOR:
+			process_ike_mid(this, message, TRUE);
+			break;
+		case HA_IKE_MID_RESPONDER:
+			process_ike_mid(this, message, FALSE);
+			break;
 		case HA_IKE_DELETE:
 			process_ike_delete(this, message);
 			break;

src/libcharon/plugins/ha/ha_ike.c

@@ -204,19 +204,17 @@ METHOD(listener_t, message_hook, bool,
 		message->get_request(message))
 	{	/* we sync on requests, but skip it on IKE_SA_INIT */
 		ha_message_t *m;
-		u_int32_t mid;
 
-		m = ha_message_create(HA_IKE_UPDATE);
-		m->add_attribute(m, HA_IKE_ID, ike_sa->get_id(ike_sa));
-		mid = message->get_message_id(message) + 1;
 		if (incoming)
 		{
-			m->add_attribute(m, HA_RESPOND_MID, mid);
+			m = ha_message_create(HA_IKE_MID_RESPONDER);
 		}
 		else
 		{
-			m->add_attribute(m, HA_INITIATE_MID, mid);
+			m = ha_message_create(HA_IKE_MID_INITIATOR);
 		}
+		m->add_attribute(m, HA_IKE_ID, ike_sa->get_id(ike_sa));
+		m->add_attribute(m, HA_MID, message->get_message_id(message) + 1);
 		this->socket->push(this->socket, m);
 	}
 	if (ike_sa->get_state(ike_sa) == IKE_ESTABLISHED &&

src/libcharon/plugins/ha/ha_message.c

@@ -232,8 +232,7 @@ METHOD(ha_message_t, add_attribute, void,
 		case HA_EXTENSIONS:
 		case HA_INBOUND_SPI:
 		case HA_OUTBOUND_SPI:
-		case HA_INITIATE_MID:
+		case HA_MID:
-		case HA_RESPOND_MID:
 		{
 			u_int32_t val;
 
@@ -445,8 +444,7 @@ METHOD(enumerator_t, attribute_enumerate, bool,
 		case HA_EXTENSIONS:
 		case HA_INBOUND_SPI:
 		case HA_OUTBOUND_SPI:
-		case HA_INITIATE_MID:
+		case HA_MID:
-		case HA_RESPOND_MID:
 		{
 			if (this->buf.len < sizeof(u_int32_t))
 			{

src/libcharon/plugins/ha/ha_message.h

@@ -30,7 +30,7 @@
 /**
  * Protocol version of this implementation
  */
-#define HA_MESSAGE_VERSION 1
+#define HA_MESSAGE_VERSION 2
 
 typedef struct ha_message_t ha_message_t;
 typedef enum ha_message_type_t ha_message_type_t;
@@ -43,8 +43,12 @@ typedef union ha_message_value_t ha_message_value_t;
 enum ha_message_type_t {
 	/** add a completely new IKE_SA */
 	HA_IKE_ADD = 1,
-	/** update an existing IKE_SA (message IDs, address update, ...) */
+	/** update an existing IKE_SA (identities, address update, ...) */
 	HA_IKE_UPDATE,
+	/** update initiator message id */
+	HA_IKE_MID_INITIATOR,
+	/** update responder message id */
+	HA_IKE_MID_RESPONDER,
 	/** delete an existing IKE_SA */
 	HA_IKE_DELETE,
 	/** add a new CHILD_SA */
@@ -123,10 +127,8 @@ enum ha_message_attribute_t {
 	HA_LOCAL_TS,
 	/** traffic_selector_t*, remote traffic selector */
 	HA_REMOTE_TS,
-	/** u_int32_t, initiating message ID */
+	/** u_int32_t, message ID */
-	HA_INITIATE_MID,
+	HA_MID,
-	/** u_int32_t, responding message ID */
-	HA_RESPOND_MID,
 	/** u_int16_t, HA segment */
 	HA_SEGMENT,
 };