+++ /dev/null
-/*
- * This program 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 2 of the License, or
- * (at your option) any later version.
- *
- * 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-/*
- * Author : Maxim Mamontov <faust@stargazer.dp.ua>
- */
-
-#include "conn.h"
-
-#include "stg/admins.h"
-#include "stg/admin.h"
-#include "stg/logger.h"
-#include "stg/blowfish.h"
-#include "stg/bfstream.h"
-#include "stg/common.h"
-
-#include <cassert>
-#include <cstring>
-#include <cerrno>
-
-#include <unistd.h>
-#include <sys/socket.h>
-
-using STG::Conn;
-
-const char Conn::STG_HEADER[] = "SG04";
-const char Conn::OK_HEADER[] = "OKHD";
-const char Conn::ERR_HEADER[] = "ERHD";
-const char Conn::OK_LOGIN[] = "OKLG";
-const char Conn::ERR_LOGIN[] = "ERLG";
-const char Conn::OK_LOGINS[] = "OKLS";
-const char Conn::ERR_LOGINS[] = "ERLS";
-
-Conn::Conn(const BASE_PARSER::REGISTRY & registry,
- Admins & admins, int sock, const sockaddr_in& addr,
- PluginLogger & logger)
- : m_registry(registry),
- m_admins(admins),
- m_admin(NULL),
- m_sock(sock),
- m_addr(addr),
- m_keepAlive(false),
- m_parser(NULL),
- m_xmlParser(XML_ParserCreate(NULL)),
- m_state(HEADER),
- m_buffer(m_header),
- m_bufferSize(sizeof(m_header)),
- m_stream(NULL),
- m_logger(logger),
-#ifdef DUMPCRYPTO
- m_dataState(false, *this),
- m_dumper(endpoint())
-#else
- m_dataState(false, *this)
-#endif
-{
- if (m_xmlParser == NULL)
- throw Error("Failed to create XML parser.");
-
- XML_ParserReset(m_xmlParser, NULL);
- XML_SetElementHandler(m_xmlParser, ParseXMLStart, ParseXMLEnd);
- XML_SetUserData(m_xmlParser, this);
-}
-
-Conn::~Conn()
-{
- shutdown(m_sock, SHUT_RDWR);
- close(m_sock);
-
- XML_ParserFree(m_xmlParser);
-
- delete m_stream;
- delete m_parser;
-}
-
-bool Conn::Read()
-{
- ssize_t res = read(m_sock, m_buffer, m_bufferSize);
- if (res < 0)
- {
- m_state = ERROR;
- Log(__FILE__, "Failed to read data from " + endpoint() + ". Reason: '" + strerror(errno) + "'");
- return false;
- }
- if (res == 0 && m_state != DATA) // EOF is ok for data.
- {
- m_state = ERROR;
- Log(__FILE__, "Failed to read data from " + endpoint() + ". Unexpected EOF.");
- return false;
- }
-#ifdef DUMPCRYPTO
- m_dumper.write(m_buffer, res);
-#endif
- m_bufferSize -= res;
- m_buffer = static_cast<char*>(m_buffer) + res;
- return HandleBuffer(res);
-}
-
-bool Conn::WriteAnswer(const void* buffer, size_t size)
-{
- ssize_t res = write(m_sock, buffer, size);
- if (res < 0)
- {
- m_state = ERROR;
- Log(__FILE__, "Failed to write data to " + endpoint() + ". Reason: '" + strerror(errno) + "'.");
- return false;
- }
- return true;
-}
-
-BASE_PARSER * Conn::GetParser(const std::string & tag) const
-{
- BASE_PARSER::REGISTRY::const_iterator it = m_registry.find(ToLower(tag));
- if (it == m_registry.end())
- return NULL;
- return it->second->create(*m_admin);
-}
-
-bool Conn::HandleBuffer(size_t size)
-{
- if (m_state == DATA)
- return HandleData(size);
-
- if (m_bufferSize > 0)
- return true;
-
- switch (m_state)
- {
- case HEADER: return HandleHeader();
- case LOGIN: return HandleLogin();
- case CRYPTO_LOGIN: return HandleCryptoLogin();
- default: return true;
- }
-
- return true;
-}
-
-bool Conn::HandleHeader()
-{
- if (strncmp(m_header, STG_HEADER, sizeof(m_header)) != 0)
- {
- Log(__FILE__, "Received invalid header from " + endpoint() + ".");
- WriteAnswer(ERR_HEADER, sizeof(ERR_HEADER) - 1); // Without \0
- m_state = ERROR;
- return false;
- }
- m_state = LOGIN;
- m_buffer = m_login;
- m_bufferSize = sizeof(m_login);
- return WriteAnswer(OK_HEADER, sizeof(OK_HEADER) - 1); // Without \0
-}
-
-bool Conn::HandleLogin()
-{
- if (m_admins.find(m_login, &m_admin)) // ADMINS::Find returns true on error.
- {
- std::string login(m_login, strnlen(m_login, sizeof(m_login)));
- Log(__FILE__, "Received invalid login '" + ToPrintable(login) + "' from " + endpoint() + ".");
- WriteAnswer(ERR_LOGIN, sizeof(ERR_LOGIN) - 1); // Without \0
- m_state = ERROR;
- return false;
- }
- m_admin->setIP(IP());
- m_state = CRYPTO_LOGIN;
- m_buffer = m_cryptoLogin;
- m_bufferSize = sizeof(m_cryptoLogin);
- return WriteAnswer(OK_LOGIN, sizeof(OK_LOGIN) - 1); // Without \0
-}
-
-bool Conn::HandleCryptoLogin()
-{
- char login[ADM_LOGIN_LEN + 1];
- BLOWFISH_CTX ctx;
- InitContext(m_admin->password().c_str(), ADM_PASSWD_LEN, &ctx);
- DecryptString(login, m_cryptoLogin, ADM_LOGIN_LEN, &ctx);
-
- if (strncmp(m_login, login, sizeof(login)) != 0)
- {
- Log(__FILE__, "Attempt to connect with wrong password from " + m_admin->login() + "@" + endpoint() + ".");
- WriteAnswer(ERR_LOGINS, sizeof(ERR_LOGINS) - 1); // Without \0
- m_state = ERROR;
- return false;
- }
-
- m_state = DATA;
- m_buffer = m_data;
- m_bufferSize = sizeof(m_data);
- m_stream = new STG::DECRYPT_STREAM(m_admin->password(), DataCallback, &m_dataState);
- return WriteAnswer(OK_LOGINS, sizeof(OK_LOGINS) - 1); // Without \0
-}
-
-bool Conn::HandleData(size_t size)
-{
- m_stream->Put(m_data, size, size == 0 || memchr(m_data, 0, size) != NULL);
- m_buffer = m_data;
- return m_stream->IsOk();
-}
-
-bool Conn::DataCallback(const void * block, size_t size, void * data)
-{
- assert(data != NULL);
- DataState& state = *static_cast<DataState *>(data);
-
- const char * xml = static_cast<const char *>(block);
- size_t length = strnlen(xml, size);
-
- state.final = state.final || length < size || size == 0;
-
- if (XML_Parse(state.conn.m_xmlParser, xml, length, state.final) == XML_STATUS_ERROR)
- {
- state.conn.Log(__FILE__, "Received invalid XML from " + state.conn.m_admin->login() + "@" + state.conn.endpoint() + ".");
- printfd(__FILE__, "XML parse error at line %d, %d: %s. Is final: %d\n",
- static_cast<int>(XML_GetCurrentLineNumber(state.conn.m_xmlParser)),
- static_cast<int>(XML_GetCurrentColumnNumber(state.conn.m_xmlParser)),
- XML_ErrorString(XML_GetErrorCode(state.conn.m_xmlParser)), (int)state.final);
- printfd(__FILE__, "Data block: '%s' of size %d\n", xml, length);
- state.conn.m_state = ERROR;
- return false;
- }
-
- if (state.final)
- {
- if (!state.conn.WriteResponse())
- {
- state.conn.Log(__FILE__, "Failed to write response to " + state.conn.m_admin->login() + "@" + state.conn.endpoint() + ".");
- state.conn.m_state = ERROR;
- return false;
- }
- state.conn.m_state = DONE;
- }
-
- return true;
-}
-
-void Conn::ParseXMLStart(void * data, const char * el, const char ** attr)
-{
- assert(data != NULL);
- Conn & conn = *static_cast<Conn *>(data);
-
- if (conn.m_parser == NULL)
- conn.m_parser = conn.GetParser(el);
-
- if (conn.m_parser == NULL)
- {
- conn.Log(__FILE__, "Received unknown command '" + std::string(el) + "' from " + conn.m_admin->login() + "@" + conn.endpoint() + ".");
- conn.m_state = ERROR;
- return;
- }
-
- conn.m_parser->Start(data, el, attr);
-}
-
-void Conn::ParseXMLEnd(void * data, const char * el)
-{
- assert(data != NULL);
- Conn & conn = *static_cast<Conn *>(data);
-
- if (conn.m_parser == NULL)
- {
- // No need to log it.
- conn.m_state = ERROR;
- return;
- }
-
- conn.m_parser->End(data, el);
-}
-
-bool Conn::WriteResponse()
-{
- STG::ENCRYPT_STREAM stream(m_admin->password(), WriteCallback, this);
- std::string answer;
- if (m_parser != NULL)
- answer = m_parser->GetAnswer();
- else
- answer = "<Error result=\"Unknown command.\"/>";
- delete m_parser;
- m_parser = NULL;
- printfd(__FILE__, "Writing %d bytes of answer.\n", answer.length());
- stream.Put(answer.c_str(), answer.length() + 1 /* including \0 */, true /* final */);
- return stream.IsOk();
-}
-
-bool Conn::WriteCallback(const void * block, size_t size, void * data)
-{
- assert(data != NULL);
- Conn & conn = *static_cast<Conn *>(data);
- return WriteAll(conn.m_sock, block, size);;
-}
-
-void Conn::Log(const char * file, const std::string & message)
-{
- printfd(file, "%s\n", message.c_str());
- m_logger(message);
-}
git.stg.codes / stg.git / blobdiff