Use acked updates for seqno request replies

1 files changed, 16 insertions, 1 deletions

diff --git a/ffd/send.c b/ffd/send.c
index dc6544b..2cd57bf 100644
--- a/ffd/send.c
+++ b/ffd/send.c
@@ -188,6 +188,18 @@ void ffd_send_hellos(void) {
 	}
 }
 
+static bool add_ack_request(ffd_packet_t *packet, uint16_t nonce) {
+	ffd_tlv_ack_req_t *tlv = ffd_tlv_add(packet, FFD_PACKET_MAX, TLV_ACK_REQ, sizeof(ffd_tlv_ack_req_t));
+	if (!tlv)
+		return false;
+
+	tlv->reserved = 0;
+	tlv->nonce = htons(nonce);
+	tlv->interval = htons(FFD_ACK_INTERVAL);
+
+	return true;
+}
+
 static bool add_node_id(ffd_packet_t *packet, size_t max_len, ffd_node_id_t node_id) {
 	ffd_tlv_node_id_t *tlv = ffd_tlv_add(packet, FFD_PACKET_MAX, TLV_NODE_ID, sizeof(ffd_tlv_node_id_t));
 	if (!tlv)
@@ -329,7 +341,7 @@ void ffd_send_retract(ffd_neigh_t *neigh, ffd_node_id_t node, uint16_t type, uin
 	send_neigh(neigh, packet);
 }
 
-ffd_update_t* ffd_send_update_new(ffd_iface_t *iface, ffd_neigh_t *neigh) {
+ffd_update_t* ffd_send_update_new(ffd_iface_t *iface, ffd_neigh_t *neigh, const uint16_t *nonce) {
 	unsigned max_updates = (FFD_PACKET_MAX+sizeof(ffd_tlv_update_t)+1)/(sizeof(ffd_tlv_update_t)+2);
 	ffd_update_t *update = calloc(1, sizeof(ffd_update_t) + max_updates*sizeof(announce_info_t));
 	update->iface = iface;
@@ -340,6 +352,9 @@ ffd_update_t* ffd_send_update_new(ffd_iface_t *iface, ffd_neigh_t *neigh) {
 	update->packet->version_magic = htons(FFD_VERSION_MAGIC);
 	update->packet->len = 0;
 
+	if (nonce)
+		add_ack_request(update->packet, *nonce);
+
 	return update;
 }