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/* * Copyright (c) 2015, 2023, Oracle and/or its affiliates. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, version 2.0, * as published by the Free Software Foundation. * * This program is also distributed with certain software (including * but not limited to OpenSSL) that is licensed under separate terms, * as designated in a particular file or component or in included license * documentation. The authors of MySQL hereby grant you an additional * permission to link the program and your derivative works with the * separately licensed software that they have included with MySQL. * * This program 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, version 2.0, for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA */ // MySQL DB access module, for use by plugins and others // For the module that implements interactive DB functionality see mod_db #include "mysqlx_connection.h" #include "my_global.h" #include <sstream> #ifdef HAVE_SYS_UN_H #include <sys/un.h> #endif // HAVE_SYS_UN_H #ifdef WIN32 # define snprintf _snprintf #endif // WIN32 namespace mysqlx { Connection::Connection(const char *ssl_key, const char *ssl_ca, const char *ssl_ca_path, const char *ssl_cert, const char *ssl_cipher, const char *tls_version, const std::size_t timeout) : m_timeout(timeout), m_vio(NULL), m_ssl_active(false), m_ssl_init_error(SSL_INITERR_NOERROR) { long ssl_ctx_flags = process_tls_version(tls_version); m_vioSslFd = new_VioSSLConnectorFd(ssl_key, ssl_cert, ssl_ca, ssl_ca_path, ssl_cipher, &m_ssl_init_error, NULL, NULL, ssl_ctx_flags); m_ssl = NULL != ssl_key || NULL != ssl_cert || NULL != ssl_ca || NULL != ssl_ca_path || NULL != ssl_cipher; } Connection::~Connection() { close(); if (NULL != m_vioSslFd) { free_vio_ssl_acceptor_fd(m_vioSslFd); m_vioSslFd = NULL; } } Error Connection::connect_to_localhost(const std::string &named_pipe_or_unix_socket) { #if defined(HAVE_SYS_UN_H) sockaddr_un addr; if (named_pipe_or_unix_socket.empty()) throw Error(CR_UNKNOWN_HOST, "UNIX Socket file was not specified"); if (named_pipe_or_unix_socket.length() > (sizeof(addr.sun_path) - 1)) { std::stringstream stream; stream << "UNIX Socket file name too long, size should be less or equal " << sizeof(addr.sun_path) - 1; throw Error(CR_UNKNOWN_HOST, stream.str()); } memset(&addr, 0, sizeof(addr)); addr.sun_family= AF_UNIX; strncpy(addr.sun_path, named_pipe_or_unix_socket.c_str(), sizeof(addr.sun_path)-1); addr.sun_path[sizeof(addr.sun_path)-1] = 0; return connect((sockaddr*)&addr, sizeof(addr)); #else return Error(CR_SOCKET_CREATE_ERROR, "Named pipes aren't supported on current OS"); #endif // defined(HAVE_SYS_UN_H) } Error Connection::connect(sockaddr *addr, const std::size_t addr_size) { my_socket s = ::socket(addr->sa_family, SOCK_STREAM, addr->sa_family == AF_UNIX ? 0: IPPROTO_TCP); return connect(s, (sockaddr*)addr, addr_size); } Error Connection::connect(my_socket s, sockaddr *addr, const std::size_t addr_size) { int err = 0; enum_vio_type type = VIO_TYPE_TCPIP; if (s == INVALID_SOCKET) return Error(CR_SOCKET_CREATE_ERROR, "Invalid socket"); int res = ::connect(s, (const sockaddr*)addr, (socklen_t)addr_size); if (0 != res) { err = socket_errno; ::closesocket(s); return get_socket_error(err); } if (AF_UNIX == addr->sa_family) type = VIO_TYPE_SOCKET; m_vio = vio_new(s, type, 0); return Error(); } std::string Connection::get_socket_error_description(const int error_id) { std::string strerr; #ifdef _WIN32 char *s = NULL; if (0 == FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, error_id, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&s, 0, NULL)) { char text[256]; snprintf(text, sizeof(text), "Error %i", error_id); strerr = text; } else { strerr = s; LocalFree(s); while ( strerr.size() && (strerr[strerr.size()-1] == '\n' || strerr[strerr.size()-1] == '\r')) { strerr.erase( strerr.size()-1 ); } if ( strerr.size() && strerr[strerr.size()-1] == '.' ) { strerr.erase( strerr.size()-1 ); } } #else strerr = strerror(error_id); #endif return strerr; } Error Connection::get_ssl_init_error(const int init_error_id) { return Error(CR_SSL_CONNECTION_ERROR, sslGetErrString((enum_ssl_init_error)init_error_id)); } #ifdef _WIN32 #define SOCKET_ERROR_WIN_OR_POSIX(W,P) W #else #define SOCKET_ERROR_WIN_OR_POSIX(W,P) P #endif // _WIN32 #define SOCKET_EPIPE SOCKET_ERROR_WIN_OR_POSIX(ERROR_BROKEN_PIPE, EPIPE) #define SOCKET_ECONNABORTED SOCKET_ERROR_WIN_OR_POSIX(WSAECONNABORTED, ECONNABORTED) Error Connection::get_socket_error(const int error_id) { switch (error_id) { #if defined(__APPLE__) // OSX return this undocumented error in case of kernel race-conndition // lets ignore it and next call to any io function should return correct // error case EPROTOTYPE: return Error(); #endif // defined(__APPLE__) case SOCKET_ECONNABORTED: case SOCKET_ECONNRESET: return Error(CR_SERVER_GONE_ERROR, "MySQL server has gone away"); case SOCKET_EPIPE: return Error(CR_BROKEN_PIPE, "MySQL server has gone away"); default: return Error(CR_UNKNOWN_ERROR, get_socket_error_description(error_id)); } } Error Connection::get_ssl_error(const int error_id) { const unsigned int buffer_size = 1024; std::string r; r.resize(buffer_size); char *buffer = &r[0]; ERR_error_string_n(error_id, buffer, buffer_size); return Error(CR_SSL_CONNECTION_ERROR, buffer); } Error Connection::activate_tls() { if (NULL == m_vioSslFd) return get_ssl_init_error(m_ssl_init_error); unsigned long error; if (0 != sslconnect(m_vioSslFd, m_vio, 60, &error)) { return get_ssl_error(error); } m_ssl_active = true; return Error(); } Error Connection::shutdown(Shutdown_type how_to_shutdown) { if ( 0 != ::shutdown(vio_fd(m_vio), (int)how_to_shutdown) ) return get_socket_error(socket_errno); return Error(); } Error Connection::write(const void *data, const std::size_t data_length) { std::size_t left_data_to_write = data_length; const unsigned char* data_to_send = (const unsigned char*)data; do { const int result = (int)vio_write(m_vio, data_to_send, left_data_to_write); // if (-1 == result) { const int vio_error = vio_errno(m_vio); return get_socket_error(0 != vio_error ? vio_error : SOCKET_ECONNRESET); } else if (0 == result) return get_socket_error(SOCKET_ECONNRESET); left_data_to_write -= result; data_to_send += result; }while(left_data_to_write > 0); return Error(); } Error Connection::read(void *data_head, const std::size_t data_length) { int result = 0; std::size_t data_to_send = data_length; char *data = (char*)data_head; do { result = (int)vio_read(m_vio, (unsigned char*)data, data_to_send); if (-1 == result) { int vio_error = vio_errno(m_vio); vio_error = vio_error == 0 ? SOCKET_ECONNRESET : vio_error; return get_socket_error(0 != vio_error ? vio_error : SOCKET_ECONNRESET); } else if (0 == result) return get_socket_error(SOCKET_ECONNRESET); data_to_send -= result; data += result; }while(data_to_send != 0); return Error(); } Error Connection::read_with_timeout(void *data, std::size_t &data_length, const int deadline_milliseconds) { int result = vio_io_wait(m_vio, VIO_IO_EVENT_READ, deadline_milliseconds); if (-1 == result) { int vio_error = vio_errno(m_vio); vio_error = vio_error == 0 ? SOCKET_ECONNRESET : vio_error; return get_socket_error(0 != vio_error ? vio_error : SOCKET_ECONNRESET ); } else if (0 == result) { data_length = 0; } else { return read(data, data_length); } return Error(); } void Connection::close() { if (m_vio) { ::closesocket(vio_fd(m_vio)); vio_delete(m_vio); m_vio = NULL; // memory leak } } bool Connection::supports_ssl() { return m_ssl; } } // namespace mysqlx