2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 * Author : Boris Mikhailenko <stg34@stargazer.dp.ua>
19 * Author : Maxim Mamontov <faust@stargazer.dp.ua>
24 #include "stg/scriptexecuter.h"
25 #include "stg/locker.h"
26 #include "stg/common.h"
27 #include "stg/const.h"
37 #include <arpa/inet.h>
38 #include <sys/uio.h> // readv
39 #include <sys/types.h> // for historical versions of BSD
40 #include <sys/socket.h>
41 #include <netinet/in.h>
44 void InitEncrypt(BLOWFISH_CTX * ctx, const std::string & password);
46 //-----------------------------------------------------------------------------
48 : WriteServLog(STG::Logger::get()),
50 receiverStopped(true),
51 processorStopped(true),
54 version("rscriptd listener v.1.2")
57 //-----------------------------------------------------------------------------
58 void LISTENER::SetPassword(const std::string & p)
61 printfd(__FILE__, "Encryption initiated with password \'%s\'\n", password.c_str());
62 InitEncrypt(&ctxS, password);
64 //-----------------------------------------------------------------------------
65 bool LISTENER::Start()
67 printfd(__FILE__, "LISTENER::Start()\n");
74 if (!m_receiverThread.joinable())
75 m_receiverThread = std::jthread([this](auto token){ Run(std::move(token)); });
77 if (!m_processorThread.joinable())
78 m_processorThread = std::jthread([this](auto token){ RunProcessor(std::move(token)); });
84 //-----------------------------------------------------------------------------
87 m_receiverThread.request_stop();
88 m_processorThread.request_stop();
90 printfd(__FILE__, "LISTENER::Stop()\n");
92 std::this_thread::sleep_for(std::chrono::milliseconds(500));
94 if (!processorStopped)
96 //5 seconds to thread stops itself
97 for (int i = 0; i < 25 && !processorStopped; i++)
98 std::this_thread::sleep_for(std::chrono::milliseconds(200));
100 //after 5 seconds waiting thread still running. now killing it
101 if (!processorStopped)
103 //TODO pthread_cancel()
104 m_processorThread.detach();
105 printfd(__FILE__, "LISTENER killed Timeouter\n");
109 if (!receiverStopped)
111 //5 seconds to thread stops itself
112 for (int i = 0; i < 25 && !receiverStopped; i++)
113 std::this_thread::sleep_for(std::chrono::milliseconds(200));
115 //after 5 seconds waiting thread still running. now killing it
116 if (!receiverStopped)
118 //TODO pthread_cancel()
119 m_receiverThread.detach();
120 printfd(__FILE__, "LISTENER killed Run\n");
125 m_receiverThread.join();
126 if (processorStopped)
127 m_processorThread.join();
131 for (const auto& user : users)
134 printfd(__FILE__, "LISTENER::Stoped successfully.\n");
138 //-----------------------------------------------------------------------------
139 void LISTENER::Run(std::stop_token token)
141 receiverStopped = false;
143 while (!token.stop_requested())
146 receiverStopped = true;
148 //-----------------------------------------------------------------------------
149 void LISTENER::RunProcessor(std::stop_token token)
151 processorStopped = false;
153 while (!token.stop_requested())
155 std::this_thread::sleep_for(std::chrono::milliseconds(500));
156 if (!pending.empty())
161 processorStopped = true;
163 //-----------------------------------------------------------------------------
164 bool LISTENER::PrepareNet()
166 listenSocket = socket(AF_INET, SOCK_DGRAM, 0);
168 if (listenSocket < 0)
170 errorStr = "Cannot create socket.";
174 struct sockaddr_in listenAddr;
175 listenAddr.sin_family = AF_INET;
176 listenAddr.sin_port = htons(port);
177 listenAddr.sin_addr.s_addr = inet_addr("0.0.0.0");
179 if (bind(listenSocket, reinterpret_cast<sockaddr*>(&listenAddr), sizeof(listenAddr)) < 0)
181 errorStr = "LISTENER: Bind failed.";
185 printfd(__FILE__, "LISTENER::PrepareNet() >>>> Start successfull.\n");
189 //-----------------------------------------------------------------------------
190 bool LISTENER::FinalizeNet()
196 //-----------------------------------------------------------------------------
197 bool LISTENER::RecvPacket(const std::stop_token& token)
201 char buffer[RS_MAX_PACKET_LEN];
202 STG::RS::PACKET_HEADER packetHead;
204 iov[0].iov_base = reinterpret_cast<char *>(&packetHead);
205 iov[0].iov_len = sizeof(packetHead);
206 iov[1].iov_base = buffer;
207 iov[1].iov_len = sizeof(buffer) - sizeof(packetHead);
210 while (dataLen < sizeof(buffer))
212 if (!WaitPackets(listenSocket))
214 if (token.stop_requested())
218 int portion = readv(listenSocket, iov, 2);
226 if (CheckHeader(packetHead))
228 printfd(__FILE__, "Invalid packet or incorrect protocol version!\n");
232 std::string userLogin(reinterpret_cast<const char*>(packetHead.login));
234 pd.data.login = userLogin;
235 pd.data.ip = ntohl(packetHead.ip);
236 pd.data.id = ntohl(packetHead.id);
238 if (packetHead.packetType == RS_ALIVE_PACKET)
240 pd.type = PendingData::ALIVE;
242 else if (packetHead.packetType == RS_CONNECT_PACKET)
244 pd.type = PendingData::CONNECT;
245 if (GetParams(buffer, pd.data))
250 else if (packetHead.packetType == RS_DISCONNECT_PACKET)
252 pd.type = PendingData::DISCONNECT;
253 if (GetParams(buffer, pd.data))
261 std::lock_guard lock(m_mutex);
262 pending.push_back(pd);
266 //-----------------------------------------------------------------------------
267 bool LISTENER::GetParams(char * buffer, UserData & data)
269 STG::RS::PACKET_TAIL packetTail;
271 DecryptString(&packetTail, buffer, sizeof(packetTail), &ctxS);
273 if (strncmp(reinterpret_cast<const char*>(packetTail.magic), RS_ID, RS_MAGIC_LEN))
275 printfd(__FILE__, "Invalid crypto magic\n");
279 std::ostringstream params;
280 params << "\"" << data.login << "\" "
281 << inet_ntostring(data.ip) << " "
283 << reinterpret_cast<const char*>(packetTail.params);
285 data.params = params.str();
289 //-----------------------------------------------------------------------------
290 void LISTENER::ProcessPending()
292 auto it = pending.begin();
294 printfd(__FILE__, "Pending: %d\n", pending.size());
295 while (it != pending.end() && count < 256)
297 auto uit = std::lower_bound(users.begin(), users.end(), it->data.login);
298 if (it->type == PendingData::CONNECT)
300 printfd(__FILE__, "Connect packet\n");
301 if (uit == users.end() || uit->data.login != it->data.login)
303 printfd(__FILE__, "Connect new user '%s'\n", it->data.login.c_str());
306 users.insert(uit, AliveData(it->data));
310 printfd(__FILE__, "Update existing user '%s'\n", it->data.login.c_str());
311 // Update already existing user
312 time(&uit->lastAlive);
313 uit->data.params = it->data.params;
316 else if (it->type == PendingData::ALIVE)
318 printfd(__FILE__, "Alive packet\n");
319 if (uit != users.end() && uit->data.login == it->data.login)
321 printfd(__FILE__, "Alive user '%s'\n", it->data.login.c_str());
322 // Update existing user
323 time(&uit->lastAlive);
327 printfd(__FILE__, "Alive user '%s' is not found\n", it->data.login.c_str());
330 else if (it->type == PendingData::DISCONNECT)
332 printfd(__FILE__, "Disconnect packet\n");
333 if (uit != users.end() && uit->data.login == it->data.login.c_str())
335 printfd(__FILE__, "Disconnect user '%s'\n", it->data.login.c_str());
336 // Disconnect existing user
337 uit->data.params = it->data.params;
343 printfd(__FILE__, "Cannot find user '%s' for disconnect\n", it->data.login.c_str());
348 printfd(__FILE__, "Unknown packet type\n");
353 std::lock_guard lock(m_mutex);
354 pending.erase(pending.begin(), it);
356 //-----------------------------------------------------------------------------
357 void LISTENER::ProcessTimeouts()
359 const auto now = time(nullptr);
360 const auto it = std::stable_partition(users.begin(), users.end(), [this, now](const auto& data){ return difftime(now, data.lastAlive) < userTimeout; });
362 if (it != users.end())
364 printfd(__FILE__, "Total users: %d, users to disconnect: %d\n", users.size(), std::distance(it, users.end()));
366 std::for_each(it, users.end(), [this](const auto& user){ Disconnect(user);});
368 users.erase(it, users.end());
371 //-----------------------------------------------------------------------------
372 bool LISTENER::Connect(const PendingData & pd) const
374 printfd(__FILE__, "Connect %s\n", pd.data.login.c_str());
375 if (access(scriptOnConnect.c_str(), X_OK) == 0)
377 if (ScriptExec((scriptOnConnect + " " + pd.data.params).c_str()))
379 WriteServLog("Script %s cannot be executed for an unknown reason.", scriptOnConnect.c_str());
385 WriteServLog("Script %s cannot be executed. File not found.", scriptOnConnect.c_str());
390 //-----------------------------------------------------------------------------
391 bool LISTENER::Disconnect(const AliveData& ad) const
393 printfd(__FILE__, "Disconnect %s\n", ad.data.login.c_str());
394 if (access(scriptOnDisconnect.c_str(), X_OK) == 0)
396 if (ScriptExec((scriptOnDisconnect + " " + ad.data.params).c_str()))
398 WriteServLog("Script %s cannot be executed for an unknown reson.", scriptOnDisconnect.c_str());
404 WriteServLog("Script %s cannot be executed. File not found.", scriptOnDisconnect.c_str());
409 //-----------------------------------------------------------------------------
410 bool LISTENER::CheckHeader(const STG::RS::PACKET_HEADER & header) const
412 if (strncmp(reinterpret_cast<const char*>(header.magic), RS_ID, RS_MAGIC_LEN))
414 if (strncmp(reinterpret_cast<const char*>(header.protoVer), "02", RS_PROTO_VER_LEN))
418 //-----------------------------------------------------------------------------
419 void InitEncrypt(BLOWFISH_CTX * ctx, const std::string & password)
421 char keyL[PASSWD_LEN];
422 memset(keyL, 0, PASSWD_LEN);
423 strncpy(keyL, password.c_str(), PASSWD_LEN);
424 Blowfish_Init(ctx, keyL, PASSWD_LEN);
426 //-----------------------------------------------------------------------------