Rename core directory because of autoconf name clash

While doing the checks configure might generate "core" files and will
then try to remove them. Having a "core" directory generates an error
while runing the configure script.

There's no workaround but to rename the core directory.

1 files changed, 152 insertions, 0 deletions

diff --git a/toxcore/LAN_discovery.c b/toxcore/LAN_discovery.c
new file mode 100644
index 00000000..49f52ce7
--- /dev/null
+++ b/toxcore/LAN_discovery.c
@@ -0,0 +1,152 @@
+/*  LAN_discovery.c
+ *
+ *  LAN discovery implementation.
+ *
+ *  Copyright (C) 2013 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/>.
+ *
+ */
+
+#include "LAN_discovery.h"
+
+#define MAX_INTERFACES 16
+
+#ifdef __linux
+/* get the first working broadcast address that's not from "lo"
+ *  returns higher than 0 on success
+ *  returns 0 on error */
+static uint32_t get_broadcast(void)
+{
+    /* not sure how many platforms this will
+     *  run on, so it's wrapped in __linux for now */
+    struct sockaddr_in *sock_holder = NULL;
+    struct ifreq i_faces[MAX_INTERFACES];
+    struct ifconf ifconf;
+    int count = 0;
+    int sock = 0;
+    int i = 0;
+
+    /* configure ifconf for the ioctl call */
+    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+        perror("[!] get_broadcast: socket() error");
+        return 0;
+    }
+
+    memset(i_faces, 0, sizeof(struct ifreq) * MAX_INTERFACES);
+
+    ifconf.ifc_buf = (char *)i_faces;
+    ifconf.ifc_len = sizeof(i_faces);
+    count = ifconf.ifc_len / sizeof(struct ifreq);
+
+    if (ioctl(sock, SIOCGIFCONF, &ifconf) < 0) {
+        perror("get_broadcast: ioctl() error");
+        return 0;
+    }
+
+    for (i = 0; i < count; i++) {
+        /* skip the loopback interface, as it's useless */
+        if (strcmp(i_faces[i].ifr_name, "lo") != 0) {
+            if (ioctl(sock, SIOCGIFBRDADDR, &i_faces[i]) < 0) {
+                perror("[!] get_broadcast: ioctl error");
+                return 0;
+            }
+
+            /* just to clarify where we're getting the values from */
+            sock_holder = (struct sockaddr_in *)&i_faces[i].ifr_broadaddr;
+            break;
+        }
+    }
+
+    close(sock);
+
+    if (sock_holder == NULL) {
+        perror("[!] no broadcast device found");
+        return 0;
+    }
+
+    return sock_holder->sin_addr.s_addr;
+}
+#endif
+
+/* Return the broadcast ip */
+static IP broadcast_ip(void)
+{
+    IP ip;
+#ifdef __linux
+    ip.i = get_broadcast();
+
+    if (ip.i == 0)
+        /* error errored, but try anyway? */
+        ip.i = ~0;
+
+#else
+    ip.i = ~0;
+#endif
+    return ip;
+}
+
+/*return 0 if ip is a LAN ip
+  return -1 if it is not */
+static int LAN_ip(IP ip)
+{
+    if (ip.c[0] == 127)/* Loopback */
+        return 0;
+
+    if (ip.c[0] == 10)/* 10.0.0.0 to 10.255.255.255 range */
+        return 0;
+
+    if (ip.c[0] == 172 && ip.c[1] >= 16 && ip.c[1] <= 31)/* 172.16.0.0 to 172.31.255.255 range */
+        return 0;
+
+    if (ip.c[0] == 192 && ip.c[1] == 168) /* 192.168.0.0 to 192.168.255.255 range */
+        return 0;
+
+    if (ip.c[0] == 169 && ip.c[1] == 254 && ip.c[2] != 0 && ip.c[2] != 255)/* 169.254.1.0 to 169.254.254.255 range */
+        return 0;
+
+    return -1;
+}
+
+static int handle_LANdiscovery(void *object, IP_Port source, uint8_t *packet, uint32_t length)
+{
+    DHT *dht = object;
+
+    if (LAN_ip(source.ip) == -1)
+        return 1;
+
+    if (length != crypto_box_PUBLICKEYBYTES + 1)
+        return 1;
+
+    DHT_bootstrap(dht, source, packet + 1);
+    return 0;
+}
+
+
+int send_LANdiscovery(uint16_t port, Net_Crypto *c)
+{
+    uint8_t data[crypto_box_PUBLICKEYBYTES + 1];
+    data[0] = NET_PACKET_LAN_DISCOVERY;
+    memcpy(data + 1, c->self_public_key, crypto_box_PUBLICKEYBYTES);
+    IP_Port ip_port = {broadcast_ip(), port};
+    return sendpacket(c->lossless_udp->net->sock, ip_port, data, 1 + crypto_box_PUBLICKEYBYTES);
+}
+
+
+void LANdiscovery_init(DHT *dht)
+{
+    networking_registerhandler(dht->c->lossless_udp->net, NET_PACKET_LAN_DISCOVERY, &handle_LANdiscovery, dht);
+}