1 files changed, 140 insertions, 0 deletions

diff --git a/toxcore/friend_connection.h b/toxcore/friend_connection.h
new file mode 100644
index 00000000..62b82dc2
--- /dev/null
+++ b/toxcore/friend_connection.h
@@ -0,0 +1,140 @@
+/* friend_connection.h
+ *
+ * Connection to friends.
+ *
+ *  Copyright (C) 2014 Tox project All Rights Reserved.
+ *
+ *  This file is part of Tox.
+ *
+ *  Tox is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Tox is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Tox.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+
+#ifndef FRIEND_CONNECTION_H
+#define FRIEND_CONNECTION_H
+
+#include "net_crypto.h"
+#include "DHT.h"
+#include "LAN_discovery.h"
+#include "onion_client.h"
+
+
+#define MAX_FRIEND_CONNECTION_CALLBACKS 2
+#define MESSENGER_CALLBACK_INDEX 0
+#define GROUPCHAT_CALLBACK_INDEX 1
+
+#define PACKET_ID_ALIVE 16
+
+/* Interval between the sending of ping packets. */
+#define FRIEND_PING_INTERVAL 6
+
+/* If no packets are received from friend in this time interval, kill the connection. */
+#define FRIEND_CONNECTION_TIMEOUT (FRIEND_PING_INTERVAL * 3)
+
+/* Time before friend is removed from the DHT after last hearing about him. */
+#define FRIEND_DHT_TIMEOUT BAD_NODE_TIMEOUT
+
+
+enum {
+    FRIENDCONN_STATUS_NONE,
+    FRIENDCONN_STATUS_CONNECTING,
+    FRIENDCONN_STATUS_CONNECTED
+};
+
+typedef struct {
+    uint8_t status;
+
+    uint8_t real_public_key[crypto_box_PUBLICKEYBYTES];
+    uint8_t dht_temp_pk[crypto_box_PUBLICKEYBYTES];
+    uint16_t dht_lock;
+    IP_Port dht_ip_port;
+    uint64_t dht_ping_lastrecv, dht_ip_port_lastrecv;
+
+    int onion_friendnum;
+    int crypt_connection_id;
+
+    uint64_t ping_lastrecv, ping_lastsent;
+
+    struct {
+        int (*status_callback)(void *object, int id, uint8_t status);
+        void *status_callback_object;
+        int status_callback_id;
+
+        int (*data_callback)(void *object, int id, uint8_t *data, uint16_t length);
+        void *data_callback_object;
+        int data_callback_id;
+
+        int (*lossy_data_callback)(void *object, int id, const uint8_t *data, uint16_t length);
+        void *lossy_data_callback_object;
+        int lossy_data_callback_id;
+    } callbacks[MAX_FRIEND_CONNECTION_CALLBACKS];
+
+    uint16_t lock_count;
+} Friend_Conn;
+
+
+typedef struct {
+    Net_Crypto *net_crypto;
+    DHT *dht;
+    Onion_Client *onion_c;
+
+    Friend_Conn *conns;
+    uint32_t num_cons;
+
+} Friend_Connections;
+
+/* Set the callbacks for the friend connection.
+ * index is the index (0 to (MAX_FRIEND_CONNECTION_CALLBACKS - 1)) we want the callback to set in the array.
+ *
+ * return 0 on success.
+ * return -1 on failure
+ */
+int friend_connection_callbacks(Friend_Connections *fr_c, int friendcon_id, unsigned int index,
+                                int (*status_callback)(void *object, int id, uint8_t status), int (*data_callback)(void *object, int id, uint8_t *data,
+                                        uint16_t length), int (*lossy_data_callback)(void *object, int id, const uint8_t *data, uint16_t length), void *object,
+                                int number);
+
+/* return the crypt_connection_id for the connection.
+ *
+ * return crypt_connection_id on success.
+ * return -1 on failure.
+ */
+int friend_connection_crypt_connection_id(Friend_Connections *fr_c, int friendcon_id);
+
+/* Create a new friend connection.
+ * If one to that real public key already exists, increase lock count and return it.
+ *
+ * return -1 on failure.
+ * return connection id on success.
+ */
+int new_friend_connection(Friend_Connections *fr_c, const uint8_t *real_public_key);
+
+/* Kill a friend connection.
+ *
+ * return -1 on failure.
+ * return 0 on success.
+ */
+int kill_friend_connection(Friend_Connections *fr_c, int friendcon_id);
+
+/* Create new friend_connections instance. */
+Friend_Connections *new_friend_connections(Onion_Client *onion_c);
+
+/* main friend_connections loop. */
+void do_friend_connections(Friend_Connections *fr_c);
+
+/* Free everything related with friend_connections. */
+void kill_friend_connections(Friend_Connections *fr_c);
+
+#endif