If a net_crypto connection isn't using the TCP relays, disconnect from them.

TCP_connections can now be put to sleep, a state where they store what they
were connected to without being connected and then resumed from sleep.

1 files changed, 23 insertions, 0 deletions

diff --git a/toxcore/TCP_connection.h b/toxcore/TCP_connection.h
index 0b7aae64..c3cf4889 100644
--- a/toxcore/TCP_connection.h
+++ b/toxcore/TCP_connection.h
@@ -28,8 +28,13 @@
 
 #define TCP_CONN_NONE 0
 #define TCP_CONN_VALID 1
+
+/* NOTE: only used by TCP_con */
 #define TCP_CONN_CONNECTED 2
 
+/* Connection is not connected but can be quickly reconnected in case it is needed. */
+#define TCP_CONN_SLEEPING 3
+
 #define TCP_CONNECTIONS_STATUS_NONE 0
 #define TCP_CONNECTIONS_STATUS_REGISTERED 1
 #define TCP_CONNECTIONS_STATUS_ONLINE 2
@@ -64,7 +69,13 @@ typedef struct {
     TCP_Client_Connection *connection;
     uint64_t connected_time;
     uint32_t lock_count;
+    uint32_t sleep_count;
     _Bool onion;
+
+    /* Only used when connection is sleeping. */
+    IP_Port ip_port;
+    uint8_t relay_pk[crypto_box_PUBLICKEYBYTES];
+    _Bool unsleep; /* set to 1 to unsleep connection. */
 } TCP_con;
 
 typedef struct {
@@ -153,6 +164,18 @@ int new_tcp_connection_to(TCP_Connections *tcp_c, const uint8_t *public_key, int
  */
 int kill_tcp_connection_to(TCP_Connections *tcp_c, int connections_number);
 
+/* Set connection status.
+ *
+ * status of 1 means we are using the connection.
+ * status of 0 means we are not using it.
+ *
+ * Unused tcp connections will be disconnected from but kept in case they are needed.
+ *
+ * return 0 on success.
+ * return -1 on failure.
+ */
+int set_tcp_connection_to_status(TCP_Connections *tcp_c, int connections_number, _Bool status);
+
 /* Add a TCP relay tied to a connection.
  *
  * NOTE: This can only be used during the tcp_oob_callback.