From ab42c91a491823e67cdbe99c62d16654323d9666 Mon Sep 17 00:00:00 2001
From: irungentoo <irungentoo@gmail.com>
Date: Tue, 11 Nov 2014 08:03:11 -0500
Subject: [PATCH] Prevent connection ips from switching on LAN.

---
 toxcore/LAN_discovery.c | 7 +++++++
 toxcore/LAN_discovery.h | 7 -------
 toxcore/net_crypto.c    | 5 +++++
 toxcore/net_crypto.h    | 1 +
 4 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/toxcore/LAN_discovery.c b/toxcore/LAN_discovery.c
index 436b16fd..74f10c98 100644
--- a/toxcore/LAN_discovery.c
+++ b/toxcore/LAN_discovery.c
@@ -28,6 +28,13 @@
 #include "LAN_discovery.h"
 #include "util.h"
 
+/* Used for get_broadcast(). */
+#ifdef __linux
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <linux/netdevice.h>
+#endif
+
 #define MAX_INTERFACES 16
 
 
diff --git a/toxcore/LAN_discovery.h b/toxcore/LAN_discovery.h
index fcb094e4..5dffc3ad 100644
--- a/toxcore/LAN_discovery.h
+++ b/toxcore/LAN_discovery.h
@@ -28,13 +28,6 @@
 
 #include "DHT.h"
 
-/* Used for get_broadcast(). */
-#ifdef __linux
-#include <sys/ioctl.h>
-#include <arpa/inet.h>
-#include <linux/netdevice.h>
-#endif
-
 /* Interval in seconds between LAN discovery packet sending. */
 #define LAN_DISCOVERY_INTERVAL 10
 
diff --git a/toxcore/net_crypto.c b/toxcore/net_crypto.c
index c83c5d54..a36bf3ad 100644
--- a/toxcore/net_crypto.c
+++ b/toxcore/net_crypto.c
@@ -1700,6 +1700,11 @@ int set_direct_ip_port(Net_Crypto *c, int crypt_connection_id, IP_Port ip_port)
         return -1;
 
     if (!ipport_equal(&ip_port, &conn->ip_port)) {
+        if ((UDP_DIRECT_TIMEOUT + conn->direct_lastrecv_time) > current_time_monotonic()) {
+            if (LAN_ip(ip_port.ip) == 0 && LAN_ip(conn->ip_port.ip) == 0 && conn->ip_port.port == ip_port.port)
+                return -1;
+        }
+
         if (bs_list_add(&c->ip_port_list, &ip_port, crypt_connection_id)) {
             bs_list_remove(&c->ip_port_list, &conn->ip_port, crypt_connection_id);
             conn->ip_port = ip_port;
diff --git a/toxcore/net_crypto.h b/toxcore/net_crypto.h
index f977e741..b9f9e31c 100644
--- a/toxcore/net_crypto.h
+++ b/toxcore/net_crypto.h
@@ -25,6 +25,7 @@
 #define NET_CRYPTO_H
 
 #include "DHT.h"
+#include "LAN_discovery.h"
 #include "TCP_client.h"
 #include <pthread.h>