/* * Copyright (C) 2010-2015 Mamadou DIOP. * * This file is part of Open Source Doubango Framework. * * DOUBANGO 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. * * DOUBANGO 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 DOUBANGO. * */ /**@file tnet.c * @brief Network stack. */ #include "tnet.h" #include "tnet_utils.h" #include "tnet_proxy_node_socks_plugin.h" #include "tnet_proxy_plugin.h" #include "tsk_time.h" #include "tsk_debug.h" #include /* srand */ #if HAVE_OPENSSL # include #endif /** @mainpage tinyNET API Overview * *

10 Sockets and Network Functions

* * All network functions are part of tinyNET projects.
* You MUST call @ref tnet_startup() before using any network function (tnet_*). tnet_cleanup() is used to terminate use of network functions.
* The startup function will determine whether the host is a little-endian machine or not (at runtime). * * ====== * * - @ref tnet_socket_group * - @ref tnet_utils_group * - @ref tnet_dhcp_group * - @ref tnet_dhcp6_group * - @ref tnet_dns_group * - @ref tnet_nat_group (@ref tnet_stun_group, @ref tnet_turn_group, ICE) * * ====== * * * * *
LDFLAGS -ltinySAK
CFLAGS -Isrc -ItinySAK/src
* */ static tsk_bool_t __tnet_started = tsk_false; tsk_bool_t tnet_isBigEndian = tsk_false; /** * @fn tnet_startup * This is probably the most important function. You MUST call this function to initialize the network stack before calling any tnet_* function.
* On windows, this function will call WSAStartup.
* You MUST call @ref tnet_cleanup to cleanup the network stack if you no longer need to use networking function. * * @sa @ref tnet_cleanup. * @return 0 if succeed and error code otherwise. **/ int tnet_startup() { int err = 0; short word = 0x4321; if (__tnet_started) { goto bail; } if ((err = tnet_proxy_node_plugin_register(tnet_proxy_node_socks_plugin_def_t)) != 0) { goto bail; } // rand() srand((unsigned int) tsk_time_epoch()); // endianness tnet_isBigEndian = ((*(int8_t *)&word) != 0x21); #if TNET_UNDER_WINDOWS if (tnet_isBigEndian) { TSK_DEBUG_ERROR("Big endian on Windows machine. Is it right?"); } #endif // Print messages regardless the debug level #if TNET_UNDER_WINDOWS_CE && (BUILD_TYPE_GE && SIN_CITY) # define PRINT_INFO TSK_DEBUG_INFO # define PRINT_ERROR TSK_DEBUG_ERROR #else # define PRINT_INFO(FMT, ...) fprintf(stdout, FMT "\n", ##__VA_ARGS__) # define PRINT_ERROR(FMT, ...) fprintf(stderr, FMT "\n", ##__VA_ARGS__) #endif #if TNET_UNDER_WINDOWS { WORD wVersionRequested; WSADATA wsaData; wVersionRequested = MAKEWORD(2, 2); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { PRINT_ERROR("WSAStartup failed with error: %d", err); return -1; } if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) { PRINT_ERROR("Could not find a usable version of Winsock.dll"); tnet_cleanup(); return -2; } else { PRINT_INFO("The Winsock 2.2 dll was found okay"); } } #endif /* TNET_UNDER_WINDOWS */ #if HAVE_OPENSSL PRINT_INFO("SSL is enabled :)"); SSL_library_init(); OpenSSL_add_all_algorithms(); SSL_load_error_strings(); PRINT_INFO("DTLS supported: %s", tnet_dtls_is_supported() ? "yes" : "no"); PRINT_INFO("DTLS-SRTP supported: %s", tnet_dtls_is_srtp_supported() ? "yes" : "no"); #else PRINT_ERROR("SSL is disabled :("); #endif __tnet_started = tsk_true; bail: return err; } /** * Cleanup the network stack.
* On windows, this function will call WSACleanup.
* @sa @ref tnet_startup. * @return 0 if succeed and non-zero error code otherwise. **/ int tnet_cleanup() { if (!__tnet_started) { goto bail; } tnet_proxy_node_plugin_unregister(tnet_proxy_node_socks_plugin_def_t); #if TNET_UNDER_WINDOWS __tnet_started = tsk_false; return WSACleanup(); #else __tnet_started = tsk_false; #endif bail: return 0; }