diff --git a/CMakeLists.txt b/CMakeLists.txt
index cca2f79e..2dd63713 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -232,6 +232,7 @@ endif()
 
 # LAYER 3: Distributed Hash Table
 # -------------------------------
+apidsl(toxcore/LAN_discovery.api.h)
 apidsl(toxcore/ping.api.h)
 apidsl(toxcore/ping_array.api.h)
 add_submodule(toxcore toxdht
diff --git a/other/DHT_bootstrap.c b/other/DHT_bootstrap.c
index 0e95805d..5eae46b9 100644
--- a/other/DHT_bootstrap.c
+++ b/other/DHT_bootstrap.c
@@ -181,7 +181,7 @@ int main(int argc, char *argv[])
     int is_waiting_for_dht_connection = 1;
 
     uint64_t last_LANdiscovery = 0;
-    LANdiscovery_init(dht);
+    lan_discovery_init(dht);
 
     while (1) {
         if (is_waiting_for_dht_connection && DHT_isconnected(dht)) {
@@ -192,7 +192,7 @@ int main(int argc, char *argv[])
         do_DHT(dht);
 
         if (is_timeout(last_LANdiscovery, is_waiting_for_dht_connection ? 5 : LAN_DISCOVERY_INTERVAL)) {
-            send_LANdiscovery(net_htons(PORT), dht);
+            lan_discovery_send(net_htons(PORT), dht);
             last_LANdiscovery = unix_time();
         }
 
diff --git a/other/bootstrap_daemon/src/tox-bootstrapd.c b/other/bootstrap_daemon/src/tox-bootstrapd.c
index c3af4a10..c6780fa3 100644
--- a/other/bootstrap_daemon/src/tox-bootstrapd.c
+++ b/other/bootstrap_daemon/src/tox-bootstrapd.c
@@ -316,7 +316,7 @@ int main(int argc, char *argv[])
     int waiting_for_dht_connection = 1;
 
     if (enable_lan_discovery) {
-        LANdiscovery_init(dht);
+        lan_discovery_init(dht);
         log_write(LOG_LEVEL_INFO, "Initialized LAN discovery successfully.\n");
     }
 
@@ -324,7 +324,7 @@ int main(int argc, char *argv[])
         do_DHT(dht);
 
         if (enable_lan_discovery && is_timeout(last_LANdiscovery, LAN_DISCOVERY_INTERVAL)) {
-            send_LANdiscovery(net_htons_port, dht);
+            lan_discovery_send(net_htons_port, dht);
             last_LANdiscovery = unix_time();
         }
 
diff --git a/toxcore/DHT.c b/toxcore/DHT.c
index 41c24ac0..a4251518 100644
--- a/toxcore/DHT.c
+++ b/toxcore/DHT.c
@@ -565,7 +565,7 @@ static void update_client(Logger *log, int index, Client_data *client, IP_Port i
                      net_ntohs(ip_port.port));
     }
 
-    if (LAN_ip(assoc->ip_port.ip) != 0 && LAN_ip(ip_port.ip) == 0) {
+    if (ip_is_lan(assoc->ip_port.ip) != 0 && ip_is_lan(ip_port.ip) == 0) {
         return;
     }
 
@@ -702,11 +702,11 @@ static void get_close_nodes_inner(const uint8_t *public_key, Node_format *nodes_
         }
 
         /* don't send LAN ips to non LAN peers */
-        if (LAN_ip(ipptp->ip_port.ip) == 0 && !is_LAN) {
+        if (ip_is_lan(ipptp->ip_port.ip) == 0 && !is_LAN) {
             continue;
         }
 
-        if (LAN_ip(ipptp->ip_port.ip) != 0 && want_good && hardening_correct(&ipptp->hardening) != HARDENING_ALL_OK
+        if (ip_is_lan(ipptp->ip_port.ip) != 0 && want_good && hardening_correct(&ipptp->hardening) != HARDENING_ALL_OK
                 && !id_equal(public_key, client->public_key)) {
             continue;
         }
@@ -1223,7 +1223,7 @@ static int sendnodes_ipv6(const DHT *dht, IP_Port ip_port, const uint8_t *public
     size_t Node_format_size = sizeof(Node_format);
 
     Node_format nodes_list[MAX_SENT_NODES];
-    uint32_t num_nodes = get_close_nodes(dht, client_id, nodes_list, 0, LAN_ip(ip_port.ip) == 0, 1);
+    uint32_t num_nodes = get_close_nodes(dht, client_id, nodes_list, 0, ip_is_lan(ip_port.ip) == 0, 1);
 
     VLA(uint8_t, plain, 1 + Node_format_size * MAX_SENT_NODES + length);
 
@@ -2840,11 +2840,11 @@ int DHT_non_lan_connected(const DHT *dht)
     for (uint32_t i = 0; i < LCLIENT_LIST; ++i) {
         const Client_data *client = &dht->close_clientlist[i];
 
-        if (!is_timeout(client->assoc4.timestamp, BAD_NODE_TIMEOUT) && LAN_ip(client->assoc4.ip_port.ip) == -1) {
+        if (!is_timeout(client->assoc4.timestamp, BAD_NODE_TIMEOUT) && ip_is_lan(client->assoc4.ip_port.ip) == -1) {
             return 1;
         }
 
-        if (!is_timeout(client->assoc6.timestamp, BAD_NODE_TIMEOUT) && LAN_ip(client->assoc6.ip_port.ip) == -1) {
+        if (!is_timeout(client->assoc6.timestamp, BAD_NODE_TIMEOUT) && ip_is_lan(client->assoc6.ip_port.ip) == -1) {
             return 1;
         }
     }
diff --git a/toxcore/LAN_discovery.api.h b/toxcore/LAN_discovery.api.h
new file mode 100644
index 00000000..9e6c6481
--- /dev/null
+++ b/toxcore/LAN_discovery.api.h
@@ -0,0 +1,73 @@
+%{
+/*
+ * LAN discovery implementation.
+ */
+
+/*
+ * Copyright © 2016-2017 The TokTok team.
+ * Copyright © 2013 Tox project.
+ *
+ * This file is part of Tox, the free peer to peer instant messenger.
+ *
+ * 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 LAN_DISCOVERY_H
+#define LAN_DISCOVERY_H
+
+#include "DHT.h"
+%}
+
+class dHT { struct this; }
+class iP { struct this; }
+
+namespace lan_discovery {
+
+/**
+ * Interval in seconds between LAN discovery packet sending.
+ */
+const INTERVAL = 10;
+
+/**
+ * Send a LAN discovery pcaket to the broadcast address with port port.
+ */
+static int32_t send(uint16_t port, dHT::this *dht);
+
+/**
+ * Sets up packet handlers.
+ */
+static void init(dHT::this *dht);
+
+/**
+ * Clear packet handlers.
+ */
+static void kill(dHT::this *dht);
+
+}
+
+/**
+ * Is IP a local ip or not.
+ */
+static bool ip_is_local(iP::this ip);
+
+/**
+ * checks if a given IP isn't routable
+ *
+ *  return 0 if ip is a LAN ip.
+ *  return -1 if it is not.
+ */
+static int32_t ip_is_lan(iP::this ip);
+
+%{
+#endif
+%}
diff --git a/toxcore/LAN_discovery.c b/toxcore/LAN_discovery.c
index eeba96bd..b5cf2c52 100644
--- a/toxcore/LAN_discovery.c
+++ b/toxcore/LAN_discovery.c
@@ -256,7 +256,7 @@ static IP broadcast_ip(Family family_socket, Family family_broadcast)
 }
 
 /* Is IP a local ip or not. */
-bool Local_ip(IP ip)
+bool ip_is_local(IP ip)
 {
     if (ip.family == TOX_AF_INET) {
         IP4 ip4 = ip.ip4;
@@ -271,7 +271,7 @@ bool Local_ip(IP ip)
             IP ip4;
             ip4.family = TOX_AF_INET;
             ip4.ip4.uint32 = ip.ip6.uint32[3];
-            return Local_ip(ip4);
+            return ip_is_local(ip4);
         }
 
         /* localhost in IPv6 (::1) */
@@ -286,9 +286,9 @@ bool Local_ip(IP ip)
 /*  return 0 if ip is a LAN ip.
  *  return -1 if it is not.
  */
-int LAN_ip(IP ip)
+int ip_is_lan(IP ip)
 {
-    if (Local_ip(ip)) {
+    if (ip_is_local(ip)) {
         return 0;
     }
 
@@ -335,7 +335,7 @@ int LAN_ip(IP ip)
             IP ip4;
             ip4.family = TOX_AF_INET;
             ip4.ip4.uint32 = ip.ip6.uint32[3];
-            return LAN_ip(ip4);
+            return ip_is_lan(ip4);
         }
     }
 
@@ -346,7 +346,7 @@ static int handle_LANdiscovery(void *object, IP_Port source, const uint8_t *pack
 {
     DHT *dht = (DHT *)object;
 
-    if (LAN_ip(source.ip) == -1) {
+    if (ip_is_lan(source.ip) == -1) {
         return 1;
     }
 
@@ -363,7 +363,7 @@ static int handle_LANdiscovery(void *object, IP_Port source, const uint8_t *pack
 }
 
 
-int send_LANdiscovery(uint16_t port, DHT *dht)
+int lan_discovery_send(uint16_t port, DHT *dht)
 {
     uint8_t data[CRYPTO_PUBLIC_KEY_SIZE + 1];
     data[0] = NET_PACKET_LAN_DISCOVERY;
@@ -399,12 +399,12 @@ int send_LANdiscovery(uint16_t port, DHT *dht)
 }
 
 
-void LANdiscovery_init(DHT *dht)
+void lan_discovery_init(DHT *dht)
 {
     networking_registerhandler(dht->net, NET_PACKET_LAN_DISCOVERY, &handle_LANdiscovery, dht);
 }
 
-void LANdiscovery_kill(DHT *dht)
+void lan_discovery_kill(DHT *dht)
 {
     networking_registerhandler(dht->net, NET_PACKET_LAN_DISCOVERY, NULL, NULL);
 }
diff --git a/toxcore/LAN_discovery.h b/toxcore/LAN_discovery.h
index 753de524..6d9d17b6 100644
--- a/toxcore/LAN_discovery.h
+++ b/toxcore/LAN_discovery.h
@@ -26,27 +26,49 @@
 
 #include "DHT.h"
 
-/* Interval in seconds between LAN discovery packet sending. */
-#define LAN_DISCOVERY_INTERVAL 10
+#ifndef DHT_DEFINED
+#define DHT_DEFINED
+typedef struct DHT DHT;
+#endif /* DHT_DEFINED */
 
-/* Send a LAN discovery pcaket to the broadcast address with port port. */
-int send_LANdiscovery(uint16_t port, DHT *dht);
+#ifndef IP_DEFINED
+#define IP_DEFINED
+typedef struct IP IP;
+#endif /* IP_DEFINED */
 
-/* Sets up packet handlers. */
-void LANdiscovery_init(DHT *dht);
+/**
+ * Interval in seconds between LAN discovery packet sending.
+ */
+#define LAN_DISCOVERY_INTERVAL         10
 
-/* Clear packet handlers. */
-void LANdiscovery_kill(DHT *dht);
+uint32_t lan_discovery_interval(void);
 
-/* Is IP a local ip or not. */
-bool Local_ip(IP ip);
+/**
+ * Send a LAN discovery pcaket to the broadcast address with port port.
+ */
+int32_t lan_discovery_send(uint16_t port, DHT *dht);
 
-/* checks if a given IP isn't routable
+/**
+ * Sets up packet handlers.
+ */
+void lan_discovery_init(DHT *dht);
+
+/**
+ * Clear packet handlers.
+ */
+void lan_discovery_kill(DHT *dht);
+
+/**
+ * Is IP a local ip or not.
+ */
+bool ip_is_local(IP ip);
+
+/**
+ * checks if a given IP isn't routable
  *
  *  return 0 if ip is a LAN ip.
  *  return -1 if it is not.
  */
-int LAN_ip(IP ip);
-
+int32_t ip_is_lan(IP ip);
 
 #endif
diff --git a/toxcore/friend_connection.c b/toxcore/friend_connection.c
index 41fef426..2ebc0d9b 100644
--- a/toxcore/friend_connection.c
+++ b/toxcore/friend_connection.c
@@ -229,7 +229,7 @@ int friend_add_tcp_relay(Friend_Connections *fr_c, int friendcon_id, IP_Port ip_
     }
 
     /* Local ip and same pk means that they are hosting a TCP relay. */
-    if (Local_ip(ip_port.ip) && public_key_cmp(friend_con->dht_temp_pk, public_key) == 0) {
+    if (ip_is_local(ip_port.ip) && public_key_cmp(friend_con->dht_temp_pk, public_key) == 0) {
         if (friend_con->dht_ip_port.ip.family != 0) {
             ip_port.ip = friend_con->dht_ip_port.ip;
         } else {
@@ -892,7 +892,7 @@ Friend_Connections *new_friend_connections(Onion_Client *onion_c, bool local_dis
     new_connection_handler(temp->net_crypto, &handle_new_connections, temp);
 
     if (temp->local_discovery_enabled) {
-        LANdiscovery_init(temp->dht);
+        lan_discovery_init(temp->dht);
     }
 
     return temp;
@@ -907,11 +907,11 @@ static void LANdiscovery(Friend_Connections *fr_c)
         last = last > TOX_PORTRANGE_TO ? TOX_PORTRANGE_TO : last;
 
         // Always send to default port
-        send_LANdiscovery(net_htons(TOX_PORT_DEFAULT), fr_c->dht);
+        lan_discovery_send(net_htons(TOX_PORT_DEFAULT), fr_c->dht);
 
         // And check some extra ports
         for (uint16_t port = first; port < last; port++) {
-            send_LANdiscovery(net_htons(port), fr_c->dht);
+            lan_discovery_send(net_htons(port), fr_c->dht);
         }
 
         // Don't include default port in port range
@@ -987,7 +987,7 @@ void kill_friend_connections(Friend_Connections *fr_c)
     }
 
     if (fr_c->local_discovery_enabled) {
-        LANdiscovery_kill(fr_c->dht);
+        lan_discovery_kill(fr_c->dht);
     }
 
     free(fr_c);
diff --git a/toxcore/net_crypto.c b/toxcore/net_crypto.c
index b3cf2cbf..3150392e 100644
--- a/toxcore/net_crypto.c
+++ b/toxcore/net_crypto.c
@@ -432,7 +432,7 @@ static int add_ip_port_connection(Net_Crypto *c, int crypt_connection_id, IP_Por
     }
 
     if (ip_port.ip.family == TOX_AF_INET) {
-        if (!ipport_equal(&ip_port, &conn->ip_portv4) && LAN_ip(conn->ip_portv4.ip) != 0) {
+        if (!ipport_equal(&ip_port, &conn->ip_portv4) && ip_is_lan(conn->ip_portv4.ip) != 0) {
             if (!bs_list_add(&c->ip_port_list, (uint8_t *)&ip_port, crypt_connection_id)) {
                 return -1;
             }
@@ -482,7 +482,7 @@ static IP_Port return_ip_port_connection(Net_Crypto *c, int crypt_connection_id)
         v6 = 1;
     }
 
-    if (v4 && LAN_ip(conn->ip_portv4.ip) == 0) {
+    if (v4 && ip_is_lan(conn->ip_portv4.ip) == 0) {
         return conn->ip_portv4;
     }
 
diff --git a/toxcore/network.h b/toxcore/network.h
index c8671f57..d3b80218 100644
--- a/toxcore/network.h
+++ b/toxcore/network.h
@@ -140,20 +140,19 @@ typedef union {
     uint16_t uint16[8];
     uint32_t uint32[4];
     uint64_t uint64[2];
-}
-IP6;
+} IP6;
 
 IP6 get_ip6_loopback(void);
 extern const IP6 IP6_BROADCAST;
 
+#define IP_DEFINED
 typedef struct {
     uint8_t family;
     GNU_EXTENSION union {
         IP4 ip4;
         IP6 ip6;
     };
-}
-IP;
+} IP;
 
 #define IP_PORT_DEFINED
 typedef struct IP_Port {
diff --git a/toxcore/onion_announce.c b/toxcore/onion_announce.c
index d60c09c9..ab96a546 100644
--- a/toxcore/onion_announce.c
+++ b/toxcore/onion_announce.c
@@ -405,7 +405,7 @@ static int handle_announce_request(void *object, IP_Port source, const uint8_t *
     /*Respond with a announce response packet*/
     Node_format nodes_list[MAX_SENT_NODES];
     unsigned int num_nodes = get_close_nodes(onion_a->dht, plain + ONION_PING_ID_SIZE, nodes_list, 0,
-                             LAN_ip(source.ip) == 0, 1);
+                             ip_is_lan(source.ip) == 0, 1);
     uint8_t nonce[CRYPTO_NONCE_SIZE];
     random_nonce(nonce);
 
diff --git a/toxcore/onion_client.c b/toxcore/onion_client.c
index 8a4dd40d..50373330 100644
--- a/toxcore/onion_client.c
+++ b/toxcore/onion_client.c
@@ -793,12 +793,12 @@ static int client_ping_nodes(Onion_Client *onion_c, uint32_t num, const Node_for
     }
 
     unsigned int i, j;
-    int lan_ips_accepted = (LAN_ip(source.ip) == 0);
+    int lan_ips_accepted = (ip_is_lan(source.ip) == 0);
 
     for (i = 0; i < num_nodes; ++i) {
 
         if (!lan_ips_accepted) {
-            if (LAN_ip(nodes[i].ip_port.ip) == 0) {
+            if (ip_is_lan(nodes[i].ip_port.ip) == 0) {
                 continue;
             }
         }