From fb9fc81a3510074bcfaa3caeee2aa19ddca8657f Mon Sep 17 00:00:00 2001
From: irungentoo <irungentoo@gmail.com>
Date: Thu, 14 Aug 2014 16:56:29 -0400
Subject: [PATCH] Save some path nodes to speed up joining network on pure TCP.

---
 toxcore/Messenger.c | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/toxcore/Messenger.c b/toxcore/Messenger.c
index d92ebdc6..5dea7b08 100644
--- a/toxcore/Messenger.c
+++ b/toxcore/Messenger.c
@@ -2537,9 +2537,11 @@ void do_messenger(Messenger *m)
 #define MESSENGER_STATE_TYPE_STATUSMESSAGE 5
 #define MESSENGER_STATE_TYPE_STATUS        6
 #define MESSENGER_STATE_TYPE_TCP_RELAY     10
+#define MESSENGER_STATE_TYPE_PATH_NODE     11
 
 #define SAVED_FRIEND_REQUEST_SIZE 1024
 #define NUM_SAVED_TCP_RELAYS 8
+#define NUM_SAVED_PATH_NODES 8
 struct SAVED_FRIEND {
     uint8_t status;
     uint8_t client_id[CLIENT_ID_SIZE];
@@ -2653,6 +2655,7 @@ uint32_t messenger_size(const Messenger *m)
              + sizesubhead + m->statusmessage_length           // status message
              + sizesubhead + 1                                 // status
              + sizesubhead + NUM_SAVED_TCP_RELAYS * sizeof(Node_format) //TCP relays
+             + sizesubhead + NUM_SAVED_PATH_NODES * sizeof(Node_format) //saved path nodes
              ;
 }
 
@@ -2725,6 +2728,15 @@ void messenger_save(const Messenger *m, uint8_t *data)
     memset(relays, 0, len);
     copy_connected_tcp_relays(m->net_crypto, relays, NUM_SAVED_TCP_RELAYS);
     memcpy(data, relays, len);
+    data += len;
+
+    Node_format nodes[NUM_SAVED_PATH_NODES];
+    len = sizeof(nodes);
+    type = MESSENGER_STATE_TYPE_PATH_NODE;
+    data = z_state_save_subheader(data, len, type);
+    memset(nodes, 0, len);
+    onion_backup_nodes(m->onion_c, nodes, NUM_SAVED_PATH_NODES);
+    memcpy(data, nodes, len);
 }
 
 static int messenger_load_state_callback(void *outer, const uint8_t *data, uint32_t length, uint16_t type)
@@ -2789,8 +2801,27 @@ static int messenger_load_state_callback(void *outer, const uint8_t *data, uint3
             for (i = 0; i < NUM_SAVED_TCP_RELAYS; ++i) {
                 add_tcp_relay(m->net_crypto, relays[i].ip_port, relays[i].client_id);
             }
+
+            break;
         }
-        break;
+
+        case MESSENGER_STATE_TYPE_PATH_NODE: {
+            Node_format nodes[NUM_SAVED_PATH_NODES];
+
+            if (length != sizeof(nodes)) {
+                return -1;
+            }
+
+            memcpy(nodes, data, length);
+            uint32_t i;
+
+            for (i = 0; i < NUM_SAVED_PATH_NODES; ++i) {
+                onion_add_path_node(m->onion_c, nodes[i].ip_port, nodes[i].client_id);
+            }
+
+            break;
+        }
+
 #ifdef DEBUG
 
         default: