175 lines
4.8 KiB
C
Executable File
175 lines
4.8 KiB
C
Executable File
/*
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* Copyright (C) 2010-2015 Mamadou DIOP.
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*
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* This file is part of Open Source Doubango Framework.
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*
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* DOUBANGO is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* DOUBANGO is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with DOUBANGO.
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*
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*/
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/**@file tnet.c
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* @brief Network stack.
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*/
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#include "tnet.h"
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#include "tnet_utils.h"
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#include "tnet_proxy_node_socks_plugin.h"
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#include "tnet_proxy_plugin.h"
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#include "tsk_time.h"
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#include "tsk_debug.h"
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#include <stdlib.h> /* srand */
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#if HAVE_OPENSSL
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# include <openssl/ssl.h>
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#endif
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/** @mainpage tinyNET API Overview
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*
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* <h1>10 Sockets and Network Functions</h1>
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*
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* All network functions are part of tinyNET projects.<br>
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* You MUST call @ref tnet_startup() before using any network function (tnet_*). tnet_cleanup() is used to terminate use of network functions. <br>
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* The startup function will determine whether the host is a little-endian machine or not (at runtime).
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*
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* ======
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*
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* - @ref tnet_socket_group
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* - @ref tnet_utils_group
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* - @ref tnet_dhcp_group
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* - @ref tnet_dhcp6_group
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* - @ref tnet_dns_group
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* - @ref tnet_nat_group (@ref tnet_stun_group, @ref tnet_turn_group, ICE)
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*
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* ======
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*
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* <table>
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* <tr> <td><b>LDFLAGS</b></td> <td>-ltinySAK</td> </tr>
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* <tr> <td><b>CFLAGS</b></td> <td>-Isrc -ItinySAK/src</td> </tr>
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* </table>
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*
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*/
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static tsk_bool_t __tnet_started = tsk_false;
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tsk_bool_t tnet_isBigEndian = tsk_false;
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/**
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* @fn tnet_startup
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* This is probably the most important function. You MUST call this function to initialize the network stack before calling any <b>tnet_*</b> function. <br />
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* On windows, this function will call <a target=_blank href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms742213(v=vs.85).aspx">WSAStartup</a>. <br />
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* You MUST call @ref tnet_cleanup to cleanup the network stack if you no longer need to use networking function.
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*
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* @sa @ref tnet_cleanup.
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* @return 0 if succeed and error code otherwise.
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**/
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int tnet_startup()
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{
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int err = 0;
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short word = 0x4321;
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if (__tnet_started) {
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goto bail;
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}
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if ((err = tnet_proxy_node_plugin_register(tnet_proxy_node_socks_plugin_def_t)) != 0) {
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goto bail;
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}
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// rand()
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srand((unsigned int) tsk_time_epoch());
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// endianness
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tnet_isBigEndian = ((*(int8_t *)&word) != 0x21);
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#if TNET_UNDER_WINDOWS
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if (tnet_isBigEndian) {
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TSK_DEBUG_ERROR("Big endian on Windows machine. Is it right?");
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}
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#endif
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// Print messages regardless the debug level
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#if TNET_UNDER_WINDOWS_CE && (BUILD_TYPE_GE && SIN_CITY)
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# define PRINT_INFO TSK_DEBUG_INFO
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# define PRINT_ERROR TSK_DEBUG_ERROR
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#else
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# define PRINT_INFO(FMT, ...) fprintf(stdout, FMT "\n", ##__VA_ARGS__)
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# define PRINT_ERROR(FMT, ...) fprintf(stderr, FMT "\n", ##__VA_ARGS__)
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#endif
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#if TNET_UNDER_WINDOWS
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{
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WORD wVersionRequested;
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WSADATA wsaData;
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wVersionRequested = MAKEWORD(2, 2);
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err = WSAStartup(wVersionRequested, &wsaData);
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if (err != 0) {
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PRINT_ERROR("WSAStartup failed with error: %d", err);
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return -1;
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}
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if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) {
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PRINT_ERROR("Could not find a usable version of Winsock.dll");
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tnet_cleanup();
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return -2;
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}
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else {
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PRINT_INFO("The Winsock 2.2 dll was found okay");
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}
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}
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#endif /* TNET_UNDER_WINDOWS */
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#if HAVE_OPENSSL
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PRINT_INFO("SSL is enabled :)");
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SSL_library_init();
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OpenSSL_add_all_algorithms();
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SSL_load_error_strings();
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PRINT_INFO("DTLS supported: %s", tnet_dtls_is_supported() ? "yes" : "no");
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PRINT_INFO("DTLS-SRTP supported: %s", tnet_dtls_is_srtp_supported() ? "yes" : "no");
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#else
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PRINT_ERROR("SSL is disabled :(");
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#endif
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__tnet_started = tsk_true;
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bail:
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return err;
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}
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/**
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* Cleanup the network stack. <br />
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* On windows, this function will call <a target=_blank href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms741549(v=vs.85).aspx">WSACleanup</a>. <br />
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* @sa @ref tnet_startup.
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* @return 0 if succeed and non-zero error code otherwise.
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**/
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int tnet_cleanup()
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{
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if (!__tnet_started) {
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goto bail;
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}
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tnet_proxy_node_plugin_unregister(tnet_proxy_node_socks_plugin_def_t);
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#if TNET_UNDER_WINDOWS
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__tnet_started = tsk_false;
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return WSACleanup();
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#else
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__tnet_started = tsk_false;
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#endif
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bail:
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return 0;
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}
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