Add sending of keep-alive packets

1 files changed, 38 insertions, 2 deletions

diff --git a/src/task.c b/src/task.c
index c45bbcc..bd3ee7a 100644
--- a/src/task.c
+++ b/src/task.c
@@ -86,6 +86,30 @@ void fastd_task_schedule_handshake(fastd_context *ctx, fastd_peer *peer, int tim
 	fastd_queue_put(ctx, &ctx->task_queue, &task->entry, timeout);
 }
 
+static bool is_keepalive(fastd_queue_entry *data, void *extra) {
+	fastd_task *task = container_of(data, fastd_task, entry);
+	fastd_peer *peer = extra;
+
+	if (task->peer != peer)
+		return true;
+
+	return (task->type == TASK_KEEPALIVE);
+}
+
+void fastd_task_schedule_keepalive(fastd_context *ctx, fastd_peer *peer, int timeout) {
+	if (fastd_queue_has_entry(ctx, &ctx->task_queue, is_keepalive, peer)) {
+		pr_debug(ctx, "not sending a keepalive to %P, there still is one queued", peer);
+		return;
+	}
+
+	fastd_task *task = malloc(sizeof(fastd_task));
+
+	task->type = TASK_KEEPALIVE;
+	task->peer = peer;
+
+	fastd_queue_put(ctx, &ctx->task_queue, &task->entry, timeout);
+}
+
 typedef struct _replace_peer_extra {
 	fastd_peer *old_peer;
 	fastd_peer *new_peer;
@@ -112,6 +136,7 @@ void fastd_task_replace_peer(fastd_context *ctx, fastd_peer *old_peer, fastd_pee
 typedef struct _delete_task_extra {
 	fastd_peer *peer;
 	bool handshake_only;
+	bool keepalive_only;
 } delete_task_extra;
 
 static bool delete_task(fastd_queue_entry *data, void *extra) {
@@ -125,6 +150,9 @@ static bool delete_task(fastd_queue_entry *data, void *extra) {
 	if (e->handshake_only && task->type != TASK_HANDSHAKE)
 		return true;
 
+	if (e->keepalive_only && task->type != TASK_KEEPALIVE)
+		return true;
+
 	switch (task->type) {
 	case TASK_SEND:
 		fastd_buffer_free(task->send.buffer);
@@ -136,6 +164,9 @@ static bool delete_task(fastd_queue_entry *data, void *extra) {
 
 	case TASK_HANDSHAKE:
 		break;
+
+	case TASK_KEEPALIVE:
+		break;
 	}
 
 	free(task);
@@ -144,11 +175,16 @@ static bool delete_task(fastd_queue_entry *data, void *extra) {
 }
 
 void fastd_task_delete_peer(fastd_context *ctx, fastd_peer *peer) {
-	delete_task_extra extra = {peer, false};
+	delete_task_extra extra = {peer, false, false};
 	fastd_queue_filter(ctx, &ctx->task_queue, delete_task, &extra);
 }
 
 void fastd_task_delete_peer_handshakes(fastd_context *ctx, fastd_peer *peer) {
-	delete_task_extra extra = {peer, true};
+	delete_task_extra extra = {peer, true, false};
+	fastd_queue_filter(ctx, &ctx->task_queue, delete_task, &extra);
+}
+
+void fastd_task_delete_peer_keepalives(fastd_context *ctx, fastd_peer *peer) {
+	delete_task_extra extra = {peer, false, true};
 	fastd_queue_filter(ctx, &ctx->task_queue, delete_task, &extra);
 }