Tox sync added.

Tox sync is a proof of concept bittorrent sync inspired application that
uses tox to sync the contents of two folders.

Currently only works on POSIX compilant operating systems.

testing/Makefile.inc

@@ -23,7 +23,8 @@ noinst_PROGRAMS +=      DHT_test \
                         Lossless_UDP_testclient \
                         Lossless_UDP_testserver \
                         Messenger_test \
-                        crypto_speed_test
+                        crypto_speed_test \
+                        tox_sync
 
 DHT_test_SOURCES =      ../testing/DHT_test.c
 
@@ -99,4 +100,19 @@ crypto_speed_test_LDADD = \
                         $(NACL_LIBS) \
                         $(WINSOCK2_LIBS)
 
+tox_sync_SOURCES = \
+                        ../testing/tox_sync.c
+
+tox_sync_CFLAGS = \
+                        $(LIBSODIUM_CFLAGS) \
+                        $(NACL_CFLAGS)
+
+tox_sync_LDADD = \
+                        $(LIBSODIUM_LDFLAGS) \
+                        $(NACL_LDFLAGS) \
+                        libtoxcore.la \
+                        $(LIBSODIUM_LIBS) \
+                        $(NACL_LIBS) \
+                        $(WINSOCK2_LIBS)
+
 EXTRA_DIST += 			$(top_srcdir)/testing/misc_tools.c

testing/tox_sync.c

@@ -0,0 +1,291 @@
+/* Tox Sync
+ *
+ * Proof of concept bittorrent sync like software using tox, syncs two directories.
+ *
+ * Command line arguments are the ip, port and public_key of a node (for bootstrapping) and the folder to sync.
+ *
+ * EX: ./test 127.0.0.1 33445 CDCFD319CE3460824B33BE58FD86B8941C9585181D8FBD7C79C5721D7C2E9F7C ./sync_folder/
+ *
+ * NOTE: for security purposes, both tox sync instances must manually add each other as friend for it to work.
+ *
+ *
+ *  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/>.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "../toxcore/tox.h"
+#include "misc_tools.c"
+
+#include <unistd.h>
+#define c_sleep(x) usleep(1000*x)
+
+#include <dirent.h>
+#include <stdio.h>
+
+#define NUM_FILE_SENDERS 256
+typedef struct {
+    FILE *file;
+    uint16_t friendnum;
+    uint8_t filenumber;
+    uint8_t nextpiece[1024];
+    uint16_t piecelength;
+} File_t;
+File_t file_senders[NUM_FILE_SENDERS];
+File_t file_recv[NUM_FILE_SENDERS];
+uint8_t numfilesenders;
+
+void send_filesenders(Tox *m)
+{
+    uint32_t i;
+
+    for (i = 0; i < NUM_FILE_SENDERS; ++i) {
+        if (file_senders[i].file == 0)
+            continue;
+
+        while (1) {
+            if (!tox_file_senddata(m, file_senders[i].friendnum, file_senders[i].filenumber, file_senders[i].nextpiece,
+                                   file_senders[i].piecelength))
+                break;
+
+            file_senders[i].piecelength = fread(file_senders[i].nextpiece, 1, 1000, file_senders[i].file);
+
+            if (file_senders[i].piecelength == 0) {
+                fclose(file_senders[i].file);
+                file_senders[i].file = 0;
+
+                printf("[t] %u file transfer: %u completed %i\n", file_senders[i].friendnum, file_senders[i].filenumber,
+                       tox_file_sendcontrol(m, file_senders[i].friendnum, 0, file_senders[i].filenumber, TOX_FILECONTROL_FINISHED, 0, 0));
+                break;
+            }
+        }
+    }
+}
+int add_filesender(Tox *m, uint16_t friendnum, char *filename)
+{
+    FILE *tempfile = fopen(filename, "rb");
+
+    if (tempfile == 0)
+        return -1;
+
+    fseek(tempfile, 0, SEEK_END);
+    uint64_t filesize = ftell(tempfile);
+    fseek(tempfile, 0, SEEK_SET);
+    int filenum = tox_new_filesender(m, friendnum, filesize, (uint8_t *)filename, strlen(filename) + 1);
+
+    if (filenum == -1)
+        return -1;
+
+    file_senders[numfilesenders].file = tempfile;
+    file_senders[numfilesenders].piecelength = fread(file_senders[numfilesenders].nextpiece, 1, 1000,
+            file_senders[numfilesenders].file);
+    file_senders[numfilesenders].friendnum = friendnum;
+    file_senders[numfilesenders].filenumber = filenum;
+    ++numfilesenders;
+    return filenum;
+}
+
+void kill_filesender(Tox *m, uint8_t filenum)
+{
+    uint32_t i;
+
+    for (i = 0; i < NUM_FILE_SENDERS; ++i)
+        if (file_senders[i].file != 0 && file_senders[i].filenumber == filenum) {
+            fclose(file_senders[i].file);
+            file_senders[i].file = 0;
+        }
+}
+int not_sending()
+{
+    uint32_t i;
+
+    for (i = 0; i < NUM_FILE_SENDERS; ++i)
+        if (file_senders[i].file != 0)
+            return 0;
+
+    return 1;
+}
+
+static char path[1024];
+
+void file_request_accept(Tox *m, int friendnumber, uint8_t filenumber, uint64_t filesize, uint8_t *filename,
+                         uint16_t filename_length, void *userdata)
+{
+    char fullpath[1024];
+    uint32_t i;
+    uint16_t rm = 0;
+
+    for (i = 0; i < strlen((char *)filename); ++i) {
+        if (filename[i] == '/')
+            rm = i;
+    }
+
+    if (path[strlen(path) - 1] == '/')
+        sprintf(fullpath, "%s%s", path, filename + rm + 1);
+    else
+        sprintf(fullpath, "%s/%s", path, filename + rm + 1);
+
+    FILE *tempfile = fopen(fullpath, "rb");
+
+    if (tempfile != 0) {
+        fclose(tempfile);
+        tox_file_sendcontrol(m, friendnumber, 1, filenumber, TOX_FILECONTROL_KILL, 0, 0);
+        return;
+    }
+
+    file_recv[filenumber].file = fopen(fullpath, "wb");
+
+    if (file_recv[filenumber].file == 0) {
+        tox_file_sendcontrol(m, friendnumber, 1, filenumber, TOX_FILECONTROL_KILL, 0, 0);
+        return;
+    }
+
+    if (tox_file_sendcontrol(m, friendnumber, 1, filenumber, TOX_FILECONTROL_ACCEPT, 0, 0)) {
+        printf("Accepted file transfer. (file: %s)\n", fullpath);
+    }
+
+}
+
+void file_print_control(Tox *m, int friendnumber, uint8_t recieve_send, uint8_t filenumber, uint8_t control_type,
+                        uint8_t *data,
+                        uint16_t length, void *userdata)
+{
+    if (recieve_send == 1 && (control_type == TOX_FILECONTROL_KILL || control_type == TOX_FILECONTROL_FINISHED)) {
+        kill_filesender(m, filenumber);
+        return;
+    }
+
+    if (recieve_send == 0 && (control_type == TOX_FILECONTROL_KILL || control_type == TOX_FILECONTROL_FINISHED)) {
+        fclose(file_recv[filenumber].file);
+        printf("File closed\n");
+        file_recv[filenumber].file = 0;
+        return;
+    }
+}
+
+void write_file(Tox *m, int friendnumber, uint8_t filenumber, uint8_t *data, uint16_t length, void *userdata)
+{
+    if (file_recv[filenumber].file != 0)
+        fwrite(data, length, 1, file_recv[filenumber].file);
+}
+
+void print_online(Tox *tox, int friendnumber, uint8_t status, void *userdata)
+{
+    if (status == 1)
+        printf("\nOther went online.\n");
+    else
+        printf("\nOther went offline.\n");
+}
+
+int main(int argc, char *argv[])
+{
+    uint8_t ipv6enabled = TOX_ENABLE_IPV6_DEFAULT; /* x */
+    int argvoffset = cmdline_parsefor_ipv46(argc, argv, &ipv6enabled);
+
+    if (argvoffset < 0)
+        exit(1);
+
+    /* with optional --ipvx, now it can be 1-4 arguments... */
+    if ((argc != argvoffset + 3) && (argc != argvoffset + 5)) {
+        printf("Usage: %s [--ipv4|--ipv6] ip port public_key (of the DHT bootstrap node) folder (to sync)\n", argv[0]);
+        exit(0);
+    }
+
+    Tox *tox = tox_new(ipv6enabled);
+    tox_callback_file_data(tox, write_file, NULL);
+    tox_callback_file_control(tox, file_print_control, NULL);
+    tox_callback_file_sendrequest(tox, file_request_accept, NULL);
+    tox_callback_connectionstatus(tox, print_online, NULL);
+
+    uint16_t port = htons(atoi(argv[argvoffset + 2]));
+    unsigned char *binary_string = hex_string_to_bin(argv[argvoffset + 3]);
+    int res = tox_bootstrap_from_address(tox, argv[argvoffset + 1], ipv6enabled, port, binary_string);
+
+    if (!res) {
+        printf("Failed to convert \"%s\" into an IP address. Exiting...\n", argv[argvoffset + 1]);
+        exit(1);
+    }
+
+    uint8_t address[TOX_FRIEND_ADDRESS_SIZE];
+    tox_getaddress(tox, address);
+    uint32_t i;
+
+    for (i = 0; i < TOX_FRIEND_ADDRESS_SIZE; i++) {
+        printf("%02X", address[i]);
+    }
+
+    char temp_id[128];
+    printf("\nEnter the address of the other id you want to sync with (38 bytes HEX format):\n");
+
+    if (scanf("%s", temp_id) != 1) {
+        return 1;
+    }
+
+    int num = tox_addfriend(tox, hex_string_to_bin(temp_id), (uint8_t *)"Install Gentoo", sizeof("Install Gentoo"));
+
+    if (num < 0) {
+        printf("\nSomething went wrong when adding friend.\n");
+        return 1;
+    }
+
+    memcpy(path, argv[argvoffset + 4], strlen(argv[argvoffset + 4]));
+    DIR           *d;
+    struct dirent *dir;
+    uint8_t notconnected = 1;
+
+    while (1) {
+        if (tox_isconnected(tox) && notconnected) {
+            printf("\nDHT connected.\n");
+            notconnected = 0;
+        }
+
+        if (not_sending() && tox_get_friend_connectionstatus(tox, num)) {
+            d = opendir(path);
+
+            if (d) {
+                while ((dir = readdir(d)) != NULL) {
+                    if (dir->d_type == DT_REG) {
+                        char fullpath[1024];
+
+                        if (path[strlen(path) - 1] == '/')
+                            sprintf(fullpath, "%s%s", path, dir->d_name);
+                        else
+                            sprintf(fullpath, "%s/%s", path, dir->d_name);
+
+                        add_filesender(tox, num, fullpath);
+                    }
+                }
+
+                closedir(d);
+
+            } else {
+                printf("\nFailed to open directory.\n");
+                return 1;
+            }
+        }
+
+        send_filesenders(tox);
+        tox_do(tox);
+        c_sleep(1);
+    }
+
+    return 0;
+}