X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/73f478b15a61946b2c78843b968ba69b95551c09..HEAD:/projects/stargazer/plugins/authorization/inetaccess/inetaccess.cpp?ds=inline

diff --git a/projects/stargazer/plugins/authorization/inetaccess/inetaccess.cpp b/projects/stargazer/plugins/authorization/inetaccess/inetaccess.cpp
index 89ddd09c..60d3846c 100644
--- a/projects/stargazer/plugins/authorization/inetaccess/inetaccess.cpp
+++ b/projects/stargazer/plugins/authorization/inetaccess/inetaccess.cpp
@@ -18,50 +18,35 @@
  *    Author : Boris Mikhailenko <stg34@stargazer.dp.ua>
  */
 
-/*
- $Revision: 1.79 $
- $Date: 2010/03/25 15:18:48 $
- $Author: faust $
- */
- 
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif
 
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <unistd.h> // close
+#include "inetaccess.h"
 
+#include "stg/common.h"
+#include "stg/tariff.h"
+#include "stg/settings.h"
+
+#include <algorithm>
 #include <csignal>
 #include <cstdlib>
 #include <cstdio> // snprintf
 #include <cerrno>
-#include <algorithm>
+#include <cmath>
 
-#include "stg/common.h"
-#include "stg/locker.h"
-#include "stg/tariff.h"
-#include "stg/user_property.h"
-#include "stg/settings.h"
-#include "stg/plugin_creator.h"
-#include "inetaccess.h"
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <unistd.h> // close
 
-extern volatile const time_t stgTime;
+#define IA_PROTO_VER    (6)
 
-void InitEncrypt(BLOWFISH_CTX * ctx, const string & password);
-void Decrypt(BLOWFISH_CTX * ctx, char * dst, const char * src, int len8);
-void Encrypt(BLOWFISH_CTX * ctx, char * dst, const char * src, int len8);
+extern volatile time_t stgTime;
 
-//-----------------------------------------------------------------------------
-//-----------------------------------------------------------------------------
-//-----------------------------------------------------------------------------
-PLUGIN_CREATOR<AUTH_IA> iac;
-//-----------------------------------------------------------------------------
-//-----------------------------------------------------------------------------
-//-----------------------------------------------------------------------------
-PLUGIN * GetPlugin()
+extern "C" STG::Plugin* GetPlugin()
 {
-return iac.GetPlugin();
+    static AUTH_IA plugin;
+    return &plugin;
 }
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
@@ -70,20 +55,20 @@ AUTH_IA_SETTINGS::AUTH_IA_SETTINGS()
     : userDelay(0),
       userTimeout(0),
       port(0),
-      errorStr(),
-      freeMbShowType(freeMbCash)
+      freeMbShowType(freeMbCash),
+      logProtocolErrors(false)
 {
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA_SETTINGS::ParseSettings(const MODULE_SETTINGS & s)
+int AUTH_IA_SETTINGS::ParseSettings(const STG::ModuleSettings & s)
 {
 int p;
-PARAM_VALUE pv;
-vector<PARAM_VALUE>::const_iterator pvi;
+STG::ParamValue pv;
+std::vector<STG::ParamValue>::const_iterator pvi;
 ///////////////////////////
 pv.param = "Port";
 pvi = find(s.moduleParams.begin(), s.moduleParams.end(), pv);
-if (pvi == s.moduleParams.end())
+if (pvi == s.moduleParams.end() || pvi->value.empty())
     {
     errorStr = "Parameter \'Port\' not found.";
     printfd(__FILE__, "Parameter 'Port' not found\n");
@@ -95,11 +80,11 @@ if (ParseIntInRange(pvi->value[0], 2, 65535, &p))
     printfd(__FILE__, "Cannot parse parameter 'Port'\n");
     return -1;
     }
-port = p;
+port = static_cast<uint16_t>(p);
 ///////////////////////////
 pv.param = "UserDelay";
 pvi = find(s.moduleParams.begin(), s.moduleParams.end(), pv);
-if (pvi == s.moduleParams.end())
+if (pvi == s.moduleParams.end() || pvi->value.empty())
     {
     errorStr = "Parameter \'UserDelay\' not found.";
     printfd(__FILE__, "Parameter 'UserDelay' not found\n");
@@ -115,7 +100,7 @@ if (ParseIntInRange(pvi->value[0], 5, 600, &userDelay))
 ///////////////////////////
 pv.param = "UserTimeout";
 pvi = find(s.moduleParams.begin(), s.moduleParams.end(), pv);
-if (pvi == s.moduleParams.end())
+if (pvi == s.moduleParams.end() || pvi->value.empty())
     {
     errorStr = "Parameter \'UserTimeout\' not found.";
     printfd(__FILE__, "Parameter 'UserTimeout' not found\n");
@@ -128,12 +113,23 @@ if (ParseIntInRange(pvi->value[0], 15, 1200, &userTimeout))
     printfd(__FILE__, "Cannot parse parameter 'UserTimeout'\n");
     return -1;
     }
+///////////////////////////
+pv.param = "LogProtocolErrors";
+pvi = find(s.moduleParams.begin(), s.moduleParams.end(), pv);
+if (pvi == s.moduleParams.end() || pvi->value.empty())
+    logProtocolErrors = false;
+else if (ParseYesNo(pvi->value[0], &logProtocolErrors))
+    {
+    errorStr = "Cannot parse parameter \'LogProtocolErrors\': " + errorStr;
+    printfd(__FILE__, "Cannot parse parameter 'LogProtocolErrors'\n");
+    return -1;
+    }
 /////////////////////////////////////////////////////////////
-string freeMbType;
+std::string freeMbType;
 int n = 0;
 pv.param = "FreeMb";
 pvi = find(s.moduleParams.begin(), s.moduleParams.end(), pv);
-if (pvi == s.moduleParams.end())
+if (pvi == s.moduleParams.end() || pvi->value.empty())
     {
     errorStr = "Parameter \'FreeMb\' not found.";
     printfd(__FILE__, "Parameter 'FreeMb' not found\n");
@@ -157,7 +153,7 @@ else if (!str2x(freeMbType.c_str(), n))
         printfd(__FILE__, "%s\n", errorStr.c_str());
         return -1;
         }
-    freeMbShowType = (FREEMB)(freeMb0 + n);
+    freeMbShowType = static_cast<FREEMB>(n);
     }
 else
     {
@@ -174,15 +170,13 @@ return 0;
 #ifdef IA_PHASE_DEBUG
 IA_PHASE::IA_PHASE()
     : phase(1),
-      phaseTime(),
       flog(NULL)
 {
 gettimeofday(&phaseTime, NULL);
 }
 #else
 IA_PHASE::IA_PHASE()
-    : phase(1),
-      phaseTime()
+    : phase(1)
 {
 gettimeofday(&phaseTime, NULL);
 }
@@ -268,15 +262,6 @@ phase = 4;
 gettimeofday(&phaseTime, NULL);
 }
 //-----------------------------------------------------------------------------
-void IA_PHASE::SetPhase5()
-{
-#ifdef IA_PHASE_DEBUG
-WritePhaseChange(5);
-#endif
-phase = 5;
-gettimeofday(&phaseTime, NULL);
-}
-//-----------------------------------------------------------------------------
 int IA_PHASE::GetPhase() const
 {
 return phase;
@@ -298,39 +283,15 @@ return phaseTime;
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 AUTH_IA::AUTH_IA()
-    : ctxS(),
-      errorStr(),
-      iaSettings(),
-      settings(),
-      nonstop(false),
-      isRunningRun(false),
+    : isRunningRun(false),
       isRunningRunTimeouter(false),
       users(NULL),
       stgSettings(NULL),
-      ip2user(),
-      recvThread(),
-      timeouterThread(),
-      mutex(),
       listenSocket(-1),
-      connSynAck6(),
-      connSynAck8(),
-      disconnSynAck6(),
-      disconnSynAck8(),
-      aliveSyn6(),
-      aliveSyn8(),
-      fin6(),
-      fin8(),
-      packetTypes(),
       enabledDirs(0xFFffFFff),
-      onDelUserNotifier(*this),
-      logger(GetPluginLogger(GetStgLogger(), "auth_ia"))
+      logger(STG::PluginLogger::get("auth_ia"))
 {
-InitEncrypt(&ctxS, "pr7Hhen");
-
-pthread_mutexattr_t attr;
-pthread_mutexattr_init(&attr);
-pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
-pthread_mutex_init(&mutex, &attr);
+InitContext("pr7Hhen", 7, &ctxS);
 
 memset(&connSynAck6, 0, sizeof(CONN_SYN_ACK_6));
 memset(&connSynAck8, 0, sizeof(CONN_SYN_ACK_8));
@@ -374,38 +335,21 @@ packetTypes["ERR"] = ERROR_N;
 //-----------------------------------------------------------------------------
 AUTH_IA::~AUTH_IA()
 {
-pthread_mutex_destroy(&mutex);
 }
 //-----------------------------------------------------------------------------
 int AUTH_IA::Start()
 {
-users->AddNotifierUserDel(&onDelUserNotifier);
-nonstop = true;
+m_onDelUserConn = users->onDel([this](auto user){ DelUser(user); });
 
 if (PrepareNet())
-    {
     return -1;
-    }
 
-if (!isRunningRun)
-    {
-    if (pthread_create(&recvThread, NULL, Run, this))
-        {
-        errorStr = "Cannot create thread.";
-        printfd(__FILE__, "Cannot create recv thread\n");
-        return -1;
-        }
-    }
+if (!m_thread.joinable())
+    m_thread = std::jthread([this](auto token){ Run(std::move(token)); });
+
+if (!m_timeouterThread.joinable())
+    m_timeouterThread = std::jthread([this](auto token){ RunTimeouter(std::move(token)); });
 
-if (!isRunningRunTimeouter)
-    {
-    if (pthread_create(&timeouterThread, NULL, RunTimeouter, this))
-        {
-        errorStr = "Cannot create thread.";
-        printfd(__FILE__, "Cannot create timeouter thread\n");
-        return -1;
-        }
-    }
 errorStr = "";
 return 0;
 }
@@ -415,7 +359,8 @@ int AUTH_IA::Stop()
 if (!IsRunning())
     return 0;
 
-nonstop = false;
+m_thread.request_stop();
+m_timeouterThread.request_stop();
 
 std::for_each(
         ip2user.begin(),
@@ -445,7 +390,17 @@ if (isRunningRunTimeouter)
         }
     }
 
-users->DelNotifierUserDel(&onDelUserNotifier);
+m_onDelUserConn.disconnect();
+
+if (isRunningRun)
+    m_thread.detach();
+else
+    m_thread.join();
+
+if (isRunningRunTimeouter)
+    m_timeouterThread.detach();
+else
+    m_timeouterThread.join();
 
 if (isRunningRun || isRunningRunTimeouter)
     return -1;
@@ -454,61 +409,55 @@ printfd(__FILE__, "AUTH_IA::Stoped successfully.\n");
 return 0;
 }
 //-----------------------------------------------------------------------------
-void * AUTH_IA::Run(void * d)
+void AUTH_IA::Run(std::stop_token token)
 {
 sigset_t signalSet;
 sigfillset(&signalSet);
 pthread_sigmask(SIG_BLOCK, &signalSet, NULL);
 
-AUTH_IA * ia = static_cast<AUTH_IA *>(d);
-
-ia->isRunningRun = true;
+isRunningRun = true;
 
 char buffer[512];
 
 time_t touchTime = stgTime - MONITOR_TIME_DELAY_SEC;
 
-while (ia->nonstop)
+while (!token.stop_requested())
     {
-    ia->RecvData(buffer, sizeof(buffer));
-    if ((touchTime + MONITOR_TIME_DELAY_SEC <= stgTime) && ia->stgSettings->GetMonitoring())
+    RecvData(buffer, sizeof(buffer));
+    if ((touchTime + MONITOR_TIME_DELAY_SEC <= stgTime) && stgSettings->GetMonitoring())
         {
         touchTime = stgTime;
-        string monFile = ia->stgSettings->GetMonitorDir() + "/inetaccess_r";
-        TouchFile(monFile.c_str());
+        std::string monFile = stgSettings->GetMonitorDir() + "/inetaccess_r";
+        TouchFile(monFile);
         }
     }
 
-ia->isRunningRun = false;
-return NULL;
+isRunningRun = false;
 }
 //-----------------------------------------------------------------------------
-void * AUTH_IA::RunTimeouter(void * d)
+void AUTH_IA::RunTimeouter(std::stop_token token)
 {
 sigset_t signalSet;
 sigfillset(&signalSet);
 pthread_sigmask(SIG_BLOCK, &signalSet, NULL);
 
-AUTH_IA * ia = static_cast<AUTH_IA *>(d);
-
-ia->isRunningRunTimeouter = true;
+isRunningRunTimeouter = true;
 
 int a = -1;
-string monFile = ia->stgSettings->GetMonitorDir() + "/inetaccess_t";
-while (ia->nonstop)
+std::string monFile = stgSettings->GetMonitorDir() + "/inetaccess_t";
+while (!token.stop_requested())
     {
     struct timespec ts = {0, 20000000};
     nanosleep(&ts, NULL);
-    ia->Timeouter();
+    Timeouter();
     // TODO change counter to timer and MONITOR_TIME_DELAY_SEC
-    if (++a % (50 * 60) == 0 && ia->stgSettings->GetMonitoring())
+    if (++a % (50 * 60) == 0 && stgSettings->GetMonitoring())
         {
-        TouchFile(monFile.c_str());
+        TouchFile(monFile);
         }
     }
 
-ia->isRunningRunTimeouter = false;
-return NULL;
+isRunningRunTimeouter = false;
 }
 //-----------------------------------------------------------------------------
 int AUTH_IA::ParseSettings()
@@ -519,6 +468,22 @@ if (ret)
 return ret;
 }
 //-----------------------------------------------------------------------------
+int AUTH_IA::Reload(const STG::ModuleSettings & ms)
+{
+AUTH_IA_SETTINGS newIaSettings;
+if (newIaSettings.ParseSettings(ms))
+    {
+    printfd(__FILE__, "AUTH_IA::Reload() - Failed to reload InetAccess.\n");
+    logger("AUTH_IA: Cannot reload InetAccess. Errors found.");
+    return -1;
+    }
+
+printfd(__FILE__, "AUTH_IA::Reload() -  Reloaded InetAccess successfully.\n");
+logger("AUTH_IA: Reloaded InetAccess successfully.");
+iaSettings = newIaSettings;
+return 0;
+}
+//-----------------------------------------------------------------------------
 int AUTH_IA::PrepareNet()
 {
 struct sockaddr_in listenAddr;
@@ -528,6 +493,7 @@ listenSocket = socket(AF_INET, SOCK_DGRAM, 0);
 if (listenSocket < 0)
     {
     errorStr = "Cannot create socket.";
+    logger("Cannot create a socket: %s", strerror(errno));
     return -1;
     }
 
@@ -535,9 +501,10 @@ listenAddr.sin_family = AF_INET;
 listenAddr.sin_port = htons(iaSettings.GetUserPort());
 listenAddr.sin_addr.s_addr = inet_addr("0.0.0.0");
 
-if (bind(listenSocket, (struct sockaddr*)&listenAddr, sizeof(listenAddr)) < 0)
+if (bind(listenSocket, reinterpret_cast<sockaddr*>(&listenAddr), sizeof(listenAddr)) < 0)
     {
     errorStr = "AUTH_IA: Bind failed.";
+    logger("Cannot bind the socket: %s", strerror(errno));
     return -1;
     }
 
@@ -559,7 +526,7 @@ if (!WaitPackets(listenSocket)) // Timeout
 
 struct sockaddr_in outerAddr;
 socklen_t outerAddrLen(sizeof(outerAddr));
-int dataLen = recvfrom(listenSocket, buffer, bufferSize, 0, (struct sockaddr *)&outerAddr, &outerAddrLen);
+ssize_t dataLen = recvfrom(listenSocket, buffer, bufferSize, 0, reinterpret_cast<sockaddr *>(&outerAddr), &outerAddrLen);
 
 if (!dataLen) // EOF
     {
@@ -571,6 +538,7 @@ if (dataLen <= 0) // Error
     if (errno != EINTR)
         {
         printfd(__FILE__, "recvfrom res=%d, error: '%s'\n", dataLen, strerror(errno));
+        logger("recvfrom error: %s", strerror(errno));
         return -1;
         }
     return 0;
@@ -579,78 +547,82 @@ if (dataLen <= 0) // Error
 if (dataLen > 256)
     return -1;
 
+uint32_t sip = outerAddr.sin_addr.s_addr;
+uint16_t sport = htons(outerAddr.sin_port);
+
 int protoVer;
-if (CheckHeader(buffer, &protoVer))
+if (CheckHeader(buffer, sip, &protoVer))
     return -1;
 
 char login[PASSWD_LEN];  //TODO why PASSWD_LEN ?
 memset(login, 0, PASSWD_LEN);
 
-Decrypt(&ctxS, login, buffer + 8, PASSWD_LEN / 8);
+DecryptString(login, buffer + 8, PASSWD_LEN, &ctxS);
 
-uint32_t sip = outerAddr.sin_addr.s_addr;
-uint16_t sport = htons(outerAddr.sin_port);
-
-USER_PTR user;
+UserPtr user;
 if (users->FindByName(login, &user))
     {
     logger("User's connect failed: user '%s' not found. IP %s",
            login,
            inet_ntostring(sip).c_str());
     printfd(__FILE__, "User '%s' NOT found!\n", login);
-    SendError(sip, sport, protoVer, "îÅÐÒÁ×ÉÌØÎÙÊ ÌÏÇÉÎ!");
+    SendError(sip, sport, protoVer, IconvString("Неправильный логин.", "utf8", "koi8-ru"));
     return -1;
     }
 
 printfd(__FILE__, "User '%s' FOUND!\n", user->GetLogin().c_str());
 
-if (user->GetProperty().disabled.Get())
+if (user->GetProperties().disabled.Get())
     {
-    SendError(sip, sport, protoVer, "õÞÅÔÎÁÑ ÚÁÐÉÓØ ÚÁÂÌÏËÉÒÏ×ÁÎÁ");
+    logger("Cannont authorize '%s', user is disabled.", login);
+    SendError(sip, sport, protoVer, IconvString("Учетная запись заблокирована.", "utf8", "koi8-ru"));
     return 0;
     }
 
-if (user->GetProperty().passive.Get())
+if (user->GetProperties().passive.Get())
     {
-    SendError(sip, sport, protoVer, "õÞÅÔÎÁÑ ÚÁÐÉÓØ ÚÁÍÏÒÏÖÅÎÁ");
+    logger("Cannont authorize '%s', user is passive.", login);
+    SendError(sip, sport, protoVer, IconvString("Учетная запись заморожена.", "utf8", "koi8-ru"));
     return 0;
     }
 
-if (!user->GetProperty().ips.Get().IsIPInIPS(sip))
+if (!user->GetProperties().ips.Get().find(sip))
     {
     printfd(__FILE__, "User %s. IP address is incorrect. IP %s\n",
             user->GetLogin().c_str(), inet_ntostring(sip).c_str());
     logger("User %s. IP address is incorrect. IP %s",
            user->GetLogin().c_str(), inet_ntostring(sip).c_str());
-    SendError(sip, sport, protoVer, "ðÏÌØÚÏ×ÁÔÅÌØ ÎÅ ÏÐÏÚÎÁÎ! ðÒÏ×ÅÒØÔÅ IP ÁÄÒÅÓ.");
+    SendError(sip, sport, protoVer, IconvString("Пользователь не опознан. Проверьте IP-адрес.", "utf8", "koi8-ru"));
     return 0;
     }
 
 return PacketProcessor(buffer, dataLen, sip, sport, protoVer, user);
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::CheckHeader(const char * buffer, int * protoVer)
+int AUTH_IA::CheckHeader(const char * buffer, uint32_t sip, int * protoVer)
 {
 if (strncmp(IA_ID, buffer, strlen(IA_ID)) != 0)
     {
-    //SendError(userIP, updateMsg);
     printfd(__FILE__, "update needed - IA_ID\n");
-    //SendError(userIP, "Incorrect header!");
+    if (iaSettings.LogProtocolErrors())
+        logger("IP: %s. Header: invalid packed signature.", inet_ntostring(sip).c_str());
     return -1;
     }
 
 if (buffer[6] != 0) //proto[0] shoud be 0
     {
     printfd(__FILE__, "update needed - PROTO major: %d\n", buffer[6]);
-    //SendError(userIP, updateMsg);
+    if (iaSettings.LogProtocolErrors())
+        logger("IP: %s. Header: invalid protocol major version: %d.", inet_ntostring(sip).c_str(), buffer[6]);
     return -1;
     }
 
 if (buffer[7] < 6)
     {
     // need update
-    //SendError(userIP, updateMsg);
     printfd(__FILE__, "update needed - PROTO minor: %d\n", buffer[7]);
+    if (iaSettings.LogProtocolErrors())
+        logger("IP: %s. Header: invalid protocol minor version: %d.", inet_ntostring(sip).c_str(), buffer[7]);
     return -1;
     }
 else
@@ -662,15 +634,14 @@ return 0;
 //-----------------------------------------------------------------------------
 int AUTH_IA::Timeouter()
 {
-STG_LOCKER lock(&mutex, __FILE__, __LINE__);
+std::lock_guard lock(m_mutex);
 
-map<uint32_t, IA_USER>::iterator it;
+std::map<uint32_t, IA_USER>::iterator it;
 it = ip2user.begin();
-uint32_t sip;
 
 while (it != ip2user.end())
     {
-    sip = it->first;
+    uint32_t sip = it->first;
 
     static UTIME currTime;
     gettimeofday(&currTime, NULL);
@@ -678,6 +649,8 @@ while (it != ip2user.end())
     if ((it->second.phase.GetPhase() == 2)
         && (currTime - it->second.phase.GetTime()) > iaSettings.GetUserDelay())
         {
+        if (iaSettings.LogProtocolErrors())
+            logger("User '%s'. Protocol version: %d. Phase 2: connect request timeout (%f > %d).", it->second.login.c_str(), it->second.protoVer, (currTime - it->second.phase.GetTime()).AsDouble(), iaSettings.GetUserDelay().GetSec());
         it->second.phase.SetPhase1();
         printfd(__FILE__, "Phase changed from 2 to 1. Reason: timeout\n");
         ip2user.erase(it++);
@@ -720,6 +693,8 @@ while (it != ip2user.end())
 
         if ((currTime - it->second.phase.GetTime()) > iaSettings.GetUserTimeout())
             {
+            if (iaSettings.LogProtocolErrors())
+                logger("User '%s'. Protocol version: %d. Phase 3: alive timeout (%f > %d).", it->second.login.c_str(), it->second.protoVer, (currTime - it->second.phase.GetTime()).AsDouble(), iaSettings.GetUserTimeout().GetSec());
             users->Unauthorize(it->second.user->GetLogin(), this);
             ip2user.erase(it++);
             continue;
@@ -729,6 +704,8 @@ while (it != ip2user.end())
     if ((it->second.phase.GetPhase() == 4)
         && ((currTime - it->second.phase.GetTime()) > iaSettings.GetUserDelay()))
         {
+        if (iaSettings.LogProtocolErrors())
+            logger("User '%s'. Protocol version: %d. Phase 4: disconnect request timeout (%f > %d).", it->second.login.c_str(), it->second.protoVer, (currTime - it->second.phase.GetTime()).AsDouble(), iaSettings.GetUserDelay().GetSec());
         it->second.phase.SetPhase3();
         printfd(__FILE__, "Phase changed from 4 to 3. Reason: timeout\n");
         }
@@ -739,17 +716,17 @@ while (it != ip2user.end())
 return 0;
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::PacketProcessor(char * buff, int dataLen, uint32_t sip, uint16_t sport, int protoVer, USER_PTR user)
+int AUTH_IA::PacketProcessor(void * buff, size_t dataLen, uint32_t sip, uint16_t sport, int protoVer, UserPtr user)
 {
 std::string login(user->GetLogin());
-const int offset = LOGIN_LEN + 2 + 6; // LOGIN_LEN + sizeOfMagic + sizeOfVer;
+const size_t offset = LOGIN_LEN + 2 + 6; // LOGIN_LEN + sizeOfMagic + sizeOfVer;
 
-STG_LOCKER lock(&mutex, __FILE__, __LINE__);
-map<uint32_t, IA_USER>::iterator it(ip2user.find(sip));
+std::lock_guard lock(m_mutex);
+std::map<uint32_t, IA_USER>::iterator it(ip2user.find(sip));
 
 if (it == ip2user.end())
     {
-    USER_PTR userPtr;
+    UserPtr userPtr;
     if (!users->FindByIPIdx(sip, &userPtr))
         {
         if (userPtr->GetID() != user->GetID())
@@ -758,11 +735,11 @@ if (it == ip2user.end())
                     userPtr->GetLogin().c_str(),
                     inet_ntostring(sip).c_str(),
                    login.c_str());
-            logger("IP address already in use by user '%s'. IP %s, login: '%s'",
+            logger("IP address is already in use by user '%s'. IP %s, login: '%s'",
                    userPtr->GetLogin().c_str(),
                    inet_ntostring(sip).c_str(),
                    login.c_str());
-            SendError(sip, sport, protoVer, "÷ÁÛ IP ÁÄÒÅÓ ÕÖÅ ÉÓÐÏÌØÚÕÅÔÓÑ!");
+            SendError(sip, sport, protoVer, IconvString("IP-адрес уже сипользуется.", "utf8", "koi8-ru"));
             return 0;
             }
         }
@@ -783,33 +760,33 @@ else if (user->GetID() != it->second.user->GetID())
             it->second.user->GetLogin().c_str(),
             inet_ntostring(sip).c_str(),
             user->GetLogin().c_str());
-    logger("IP address already in use by user '%s'. IP %s, login: '%s'",
+    logger("IP address is already in use by user '%s'. IP %s, login: '%s'",
            it->second.user->GetLogin().c_str(),
            inet_ntostring(sip).c_str(),
            user->GetLogin().c_str());
-    SendError(sip, sport, protoVer, "÷ÁÛ IP ÁÄÒÅÓ ÕÖÅ ÉÓÐÏÌØÚÕÅÔÓÑ!");
+    SendError(sip, sport, protoVer, IconvString("IP-адрес уже используется.", "utf8", "koi8-ru"));
     return 0;
     }
 
 IA_USER * iaUser = &(it->second);
 
-if (iaUser->password != user->GetProperty().password.Get())
+if (iaUser->password != user->GetProperties().password.Get())
     {
-    InitEncrypt(&iaUser->ctx, user->GetProperty().password.Get());
-    iaUser->password = user->GetProperty().password.Get();
+    const std::string & password = user->GetProperties().password.Get();
+    InitContext(password.c_str(), password.length(), &iaUser->ctx);
+    iaUser->password = user->GetProperties().password.Get();
     }
 
-buff += offset;
-Decrypt(&iaUser->ctx, buff, buff, (dataLen - offset) / 8);
+DecryptString(static_cast<char *>(buff) + offset, static_cast<char *>(buff) + offset, (dataLen - offset), &iaUser->ctx);
 
 char packetName[IA_MAX_TYPE_LEN];
-strncpy(packetName,  buff + 4, IA_MAX_TYPE_LEN);
+strncpy(packetName,  static_cast<char *>(buff) + offset + 4, IA_MAX_TYPE_LEN);
 packetName[IA_MAX_TYPE_LEN - 1] = 0;
 
-map<string, int>::iterator pi(packetTypes.find(packetName));
+std::map<std::string, int>::iterator pi(packetTypes.find(packetName));
 if (pi == packetTypes.end())
     {
-    SendError(sip, sport, protoVer, "îÅÐÒÁ×ÉÌØÎÙÊ ÌÏÇÉÎ ÉÌÉ ÐÁÒÏÌØ!");
+    SendError(sip, sport, protoVer, IconvString("Неправильный логин или пароль.", "utf8", "koi8-ru"));
     printfd(__FILE__, "Login or password is wrong!\n");
     logger("User's connect failed. User: '%s', ip %s. Wrong login or password",
            login.c_str(),
@@ -823,11 +800,11 @@ if (user->IsAuthorizedBy(this) && user->GetCurrIP() != sip)
     printfd(__FILE__, "Login %s already in use from ip %s. IP %s\n",
             login.c_str(), inet_ntostring(user->GetCurrIP()).c_str(),
             inet_ntostring(sip).c_str());
-    logger("Login %s already in use from ip %s. IP %s",
+    logger("Login '%s' is already in use from ip %s. IP %s",
            login.c_str(),
            inet_ntostring(user->GetCurrIP()).c_str(),
            inet_ntostring(sip).c_str());
-    SendError(sip, sport, protoVer, "÷ÁÛ ÌÏÇÉÎ ÕÖÅ ÉÓÐÏÌØÚÕÅÔÓÑ!");
+    SendError(sip, sport, protoVer, IconvString("Логин уже используется.", "utf8", "koi8-ru"));
     ip2user.erase(it);
     return 0;
     }
@@ -838,15 +815,15 @@ switch (pi->second)
         switch (protoVer)
             {
             case 6:
-                if (Process_CONN_SYN_6((CONN_SYN_6 *)(buff - offset), &(it->second), sip))
+                if (Process_CONN_SYN_6(static_cast<CONN_SYN_6 *>(buff), &(it->second), sip))
                     return -1;
                 return Send_CONN_SYN_ACK_6(iaUser, sip);
             case 7:
-                if (Process_CONN_SYN_7((CONN_SYN_7 *)(buff - offset), &(it->second), sip))
+                if (Process_CONN_SYN_7(static_cast<CONN_SYN_7 *>(buff), &(it->second), sip))
                     return -1;
                 return Send_CONN_SYN_ACK_7(iaUser, sip);
             case 8:
-                if (Process_CONN_SYN_8((CONN_SYN_8 *)(buff - offset), &(it->second), sip))
+                if (Process_CONN_SYN_8(static_cast<CONN_SYN_8 *>(buff), &(it->second), sip))
                     return -1;
                 return Send_CONN_SYN_ACK_8(iaUser, sip);
             }
@@ -856,15 +833,15 @@ switch (pi->second)
         switch (protoVer)
             {
             case 6:
-                if (Process_CONN_ACK_6((CONN_ACK_6 *)(buff - offset), iaUser, sip))
+                if (Process_CONN_ACK_6(static_cast<CONN_ACK_6 *>(buff), iaUser, sip))
                     return -1;
                 return Send_ALIVE_SYN_6(iaUser, sip);
             case 7:
-                if (Process_CONN_ACK_7((CONN_ACK_6 *)(buff - offset), iaUser, sip))
+                if (Process_CONN_ACK_7(static_cast<CONN_ACK_6 *>(buff), iaUser, sip))
                     return -1;
                 return Send_ALIVE_SYN_7(iaUser, sip);
             case 8:
-                if (Process_CONN_ACK_8((CONN_ACK_8 *)(buff - offset), iaUser, sip))
+                if (Process_CONN_ACK_8(static_cast<CONN_ACK_8 *>(buff), iaUser, sip))
                     return -1;
                 return Send_ALIVE_SYN_8(iaUser, sip);
             }
@@ -874,11 +851,11 @@ switch (pi->second)
         switch (protoVer)
             {
             case 6:
-                return Process_ALIVE_ACK_6((ALIVE_ACK_6 *)(buff - offset), iaUser, sip);
+                return Process_ALIVE_ACK_6(static_cast<ALIVE_ACK_6 *>(buff), iaUser, sip);
             case 7:
-                return Process_ALIVE_ACK_7((ALIVE_ACK_6 *)(buff - offset), iaUser, sip);
+                return Process_ALIVE_ACK_7(static_cast<ALIVE_ACK_6 *>(buff), iaUser, sip);
             case 8:
-                return Process_ALIVE_ACK_8((ALIVE_ACK_8 *)(buff - offset), iaUser, sip);
+                return Process_ALIVE_ACK_8(static_cast<ALIVE_ACK_8 *>(buff), iaUser, sip);
             }
         break;
 
@@ -886,15 +863,15 @@ switch (pi->second)
         switch (protoVer)
             {
             case 6:
-                if (Process_DISCONN_SYN_6((DISCONN_SYN_6 *)(buff - offset), iaUser, sip))
+                if (Process_DISCONN_SYN_6(static_cast<DISCONN_SYN_6 *>(buff), iaUser, sip))
                     return -1;
                 return Send_DISCONN_SYN_ACK_6(iaUser, sip);
             case 7:
-                if (Process_DISCONN_SYN_7((DISCONN_SYN_6 *)(buff - offset), iaUser, sip))
+                if (Process_DISCONN_SYN_7(static_cast<DISCONN_SYN_6 *>(buff), iaUser, sip))
                     return -1;
                 return Send_DISCONN_SYN_ACK_7(iaUser, sip);
             case 8:
-                if (Process_DISCONN_SYN_8((DISCONN_SYN_8 *)(buff - offset), iaUser, sip))
+                if (Process_DISCONN_SYN_8(static_cast<DISCONN_SYN_8 *>(buff), iaUser, sip))
                     return -1;
                 return Send_DISCONN_SYN_ACK_8(iaUser, sip);
             }
@@ -904,15 +881,15 @@ switch (pi->second)
         switch (protoVer)
             {
             case 6:
-                if (Process_DISCONN_ACK_6((DISCONN_ACK_6 *)(buff - offset), iaUser, sip, it))
+                if (Process_DISCONN_ACK_6(static_cast<DISCONN_ACK_6 *>(buff), iaUser, sip, it))
                     return -1;
                 return Send_FIN_6(iaUser, sip, it);
             case 7:
-                if (Process_DISCONN_ACK_7((DISCONN_ACK_6 *)(buff - offset), iaUser, sip, it))
+                if (Process_DISCONN_ACK_7(static_cast<DISCONN_ACK_6 *>(buff), iaUser, sip, it))
                     return -1;
                 return Send_FIN_7(iaUser, sip, it);
             case 8:
-                if (Process_DISCONN_ACK_8((DISCONN_ACK_8 *)(buff - offset), iaUser, sip, it))
+                if (Process_DISCONN_ACK_8(static_cast<DISCONN_ACK_8 *>(buff), iaUser, sip, it))
                     return -1;
                 return Send_FIN_8(iaUser, sip, it);
             }
@@ -922,7 +899,7 @@ switch (pi->second)
 return -1;
 }
 //-----------------------------------------------------------------------------
-void AUTH_IA::DelUser(USER_PTR u)
+void AUTH_IA::DelUser(UserPtr u)
 {
 
 uint32_t ip = u->GetCurrIP();
@@ -930,9 +907,9 @@ uint32_t ip = u->GetCurrIP();
 if (!ip)
     return;
 
-map<uint32_t, IA_USER>::iterator it;
+std::map<uint32_t, IA_USER>::iterator it;
 
-STG_LOCKER lock(&mutex, __FILE__, __LINE__);
+std::lock_guard lock(m_mutex);
 it = ip2user.find(ip);
 if (it == ip2user.end())
     {
@@ -949,12 +926,12 @@ if (it->second.user == u)
     }
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::SendError(uint32_t ip, uint16_t port, int protoVer, const string & text)
+int AUTH_IA::SendError(uint32_t ip, uint16_t port, int protoVer, const std::string & text)
 {
 struct sockaddr_in sendAddr;
+ssize_t res;
 switch (protoVer)
     {
-    int res;
     case 6:
     case 7:
         ERR err;
@@ -965,14 +942,14 @@ switch (protoVer)
         sendAddr.sin_addr.s_addr = ip;
 
         err.len = 1;
-        strncpy((char*)err.type, "ERR", 16);
-        strncpy((char*)err.text, text.c_str(), MAX_MSG_LEN);
+        memcpy(err.type, "ERR", 3);
+        memcpy(err.text, text.c_str(), std::min<size_t>(text.length(), MAX_MSG_LEN));
 
         #ifdef ARCH_BE
         SwapBytes(err.len);
         #endif
 
-        res = sendto(listenSocket, &err, sizeof(err), 0, (struct sockaddr*)&sendAddr, sizeof(sendAddr));
+        res = sendto(listenSocket, &err, sizeof(err), 0, reinterpret_cast<sockaddr*>(&sendAddr), sizeof(sendAddr));
         printfd(__FILE__, "SendError %d bytes sent\n", res);
         break;
 
@@ -985,14 +962,14 @@ switch (protoVer)
         sendAddr.sin_addr.s_addr = ip;
 
         err8.len = 256;
-        strncpy((char*)err8.type, "ERR", 16);
-        strncpy((char*)err8.text, text.c_str(), MAX_MSG_LEN);
+        memcpy(err8.type, "ERR", 3);
+        memcpy(err8.text, text.c_str(), std::min<size_t>(text.length(), MAX_MSG_LEN));
 
         #ifdef ARCH_BE
         SwapBytes(err8.len);
         #endif
 
-        res = sendto(listenSocket, &err8, sizeof(err8), 0, (struct sockaddr*)&sendAddr, sizeof(sendAddr));
+        res = sendto(listenSocket, &err8, sizeof(err8), 0, reinterpret_cast<sockaddr*>(&sendAddr), sizeof(sendAddr));
         printfd(__FILE__, "SendError_8 %d bytes sent\n", res);
         break;
     }
@@ -1000,7 +977,7 @@ switch (protoVer)
 return 0;
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::Send(uint32_t ip, uint16_t port, const char * buffer, int len)
+int AUTH_IA::Send(uint32_t ip, uint16_t port, const void* buffer, size_t len)
 {
 struct sockaddr_in sendAddr;
 
@@ -1008,21 +985,19 @@ sendAddr.sin_family = AF_INET;
 sendAddr.sin_port = htons(port);
 sendAddr.sin_addr.s_addr = ip;
 
-int res = sendto(listenSocket, buffer, len, 0, (struct sockaddr*)&sendAddr, sizeof(sendAddr));
-
-if (res == len)
+if (sendto(listenSocket, buffer, len, 0, reinterpret_cast<sockaddr*>(&sendAddr), sizeof(sendAddr)) == static_cast<ssize_t>(len))
     return 0;
 
 return -1;
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::SendMessage(const STG_MSG & msg, uint32_t ip) const
+int AUTH_IA::SendMessage(const STG::Message & msg, uint32_t ip) const
 {
 printfd(__FILE__, "SendMessage userIP=%s\n", inet_ntostring(ip).c_str());
 
-map<uint32_t, IA_USER>::iterator it;
+std::map<uint32_t, IA_USER>::iterator it;
 
-STG_LOCKER lock(&mutex, __FILE__, __LINE__);
+std::lock_guard lock(m_mutex);
 it = ip2user.find(ip);
 if (it == ip2user.end())
     {
@@ -1033,7 +1008,7 @@ it->second.messagesToSend.push_back(msg);
 return 0;
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::RealSendMessage6(const STG_MSG & msg, uint32_t ip, IA_USER & user)
+int AUTH_IA::RealSendMessage6(const STG::Message & msg, uint32_t ip, IA_USER & user)
 {
 printfd(__FILE__, "RealSendMessage 6 user=%s\n", user.login.c_str());
 
@@ -1041,9 +1016,9 @@ INFO_6 info;
 memset(&info, 0, sizeof(INFO_6));
 
 info.len = 256;
-strncpy((char*)info.type, "INFO", 16);
+memcpy(info.type, "INFO", 4);
 info.infoType = 'I';
-strncpy((char*)info.text, msg.text.c_str(), 235);
+memcpy(info.text, msg.text.c_str(), std::min<size_t>(msg.text.length(), 235));
 info.text[234] = 0;
 
 size_t len = info.len;
@@ -1053,11 +1028,11 @@ SwapBytes(info.len);
 
 char buffer[256];
 memcpy(buffer, &info, sizeof(INFO_6));
-Encrypt(&user.ctx, buffer, buffer, len / 8);
+EncryptString(buffer, buffer, len, &user.ctx);
 return Send(ip, iaSettings.GetUserPort(), buffer, len);
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::RealSendMessage7(const STG_MSG & msg, uint32_t ip, IA_USER & user)
+int AUTH_IA::RealSendMessage7(const STG::Message & msg, uint32_t ip, IA_USER & user)
 {
 printfd(__FILE__, "RealSendMessage 7 user=%s\n", user.login.c_str());
 
@@ -1065,9 +1040,9 @@ INFO_7 info;
 memset(&info, 0, sizeof(INFO_7));
 
 info.len = 264;
-strncpy((char*)info.type, "INFO_7", 16);
-info.infoType = msg.header.type;
-info.showTime = msg.header.showTime;
+memcpy(info.type, "INFO_7", 6);
+info.infoType = static_cast<int8_t>(msg.header.type);
+info.showTime = static_cast<int8_t>(msg.header.showTime);
 info.sendTime = msg.header.creationTime;
 
 size_t len = info.len;
@@ -1076,17 +1051,17 @@ SwapBytes(info.len);
 SwapBytes(info.sendTime);
 #endif
 
-strncpy((char*)info.text, msg.text.c_str(), MAX_MSG_LEN - 1);
+memcpy(info.text, msg.text.c_str(), std::min<size_t>(msg.text.length(), MAX_MSG_LEN - 1));
 info.text[MAX_MSG_LEN - 1] = 0;
 
 char buffer[300];
 memcpy(buffer, &info, sizeof(INFO_7));
 
-Encrypt(&user.ctx, buffer, buffer, len / 8);
+EncryptString(buffer, buffer, len, &user.ctx);
 return Send(ip, iaSettings.GetUserPort(), buffer, len);
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::RealSendMessage8(const STG_MSG & msg, uint32_t ip, IA_USER & user)
+int AUTH_IA::RealSendMessage8(const STG::Message & msg, uint32_t ip, IA_USER & user)
 {
 printfd(__FILE__, "RealSendMessage 8 user=%s\n", user.login.c_str());
 
@@ -1094,12 +1069,12 @@ INFO_8 info;
 memset(&info, 0, sizeof(INFO_8));
 
 info.len = 1056;
-strncpy((char*)info.type, "INFO_8", 16);
-info.infoType = msg.header.type;
-info.showTime = msg.header.showTime;
+memcpy(info.type, "INFO_8", 6);
+info.infoType = static_cast<int8_t>(msg.header.type);
+info.showTime = static_cast<int8_t>(msg.header.showTime);
 info.sendTime = msg.header.creationTime;
 
-strncpy((char*)info.text, msg.text.c_str(), IA_MAX_MSG_LEN_8 - 1);
+memcpy(info.text, msg.text.c_str(), std::min<size_t>(msg.text.length(), IA_MAX_MSG_LEN_8 - 1));
 info.text[IA_MAX_MSG_LEN_8 - 1] = 0;
 
 size_t len = info.len;
@@ -1111,7 +1086,7 @@ SwapBytes(info.sendTime);
 char buffer[1500];
 memcpy(buffer, &info, sizeof(INFO_8));
 
-Encrypt(&user.ctx, buffer, buffer, len / 8);
+EncryptString(buffer, buffer, len, &user.ctx);
 return Send(ip, user.port, buffer, len);
 }
 //-----------------------------------------------------------------------------
@@ -1137,7 +1112,7 @@ int AUTH_IA::Process_CONN_SYN_8(CONN_SYN_8 * connSyn, IA_USER * iaUser, uint32_t
 #ifdef ARCH_BE
 SwapBytes(connSyn->dirs);
 #endif
-int ret = Process_CONN_SYN_6((CONN_SYN_6*)connSyn, iaUser, sip);
+int ret = Process_CONN_SYN_6(reinterpret_cast<CONN_SYN_6 *>(connSyn), iaUser, sip);
 enabledDirs = connSyn->dirs;
 return ret;
 }
@@ -1164,13 +1139,22 @@ if ((iaUser->phase.GetPhase() == 2) && (connAck->rnd == iaUser->rnd + 1))
     else
         {
         errorStr = iaUser->user->GetStrError();
+        if (iaSettings.LogProtocolErrors())
+            logger("IP: %s. User '%s'. Protocol version: %d. CONN_ACK: phase 2, authorization error ('%s').", inet_ntostring(sip).c_str(), iaUser->login.c_str(), iaUser->protoVer, errorStr.c_str());
         iaUser->phase.SetPhase1();
         ip2user.erase(sip);
         printfd(__FILE__, "Phase changed from 2 to 1. Reason: failed to authorize user\n");
         return -1;
         }
     }
-printfd(__FILE__, "Invalid phase or control number. Phase: %d. Control number: %d\n", iaUser->phase.GetPhase(), connAck->rnd);
+printfd(__FILE__, "Invalid phase or control number. Phase: %d. Control number: %d, expected: %d\n", iaUser->phase.GetPhase(), connAck->rnd, iaUser->rnd + 1);
+if (iaSettings.LogProtocolErrors())
+    {
+    if (iaUser->phase.GetPhase() != 2)
+        logger("IP: %s. User '%s'. Protocol version: %d. CONN_ACK: invalid phase, expected 2, got %d.", inet_ntostring(sip).c_str(), iaUser->login.c_str(), iaUser->protoVer, iaUser->phase.GetPhase());
+    if (connAck->rnd != iaUser->rnd + 1)
+        logger("IP: %s. User '%s'. Protocol version: %d. CONN_ACK: invalid control number, expected %d, got %d.", inet_ntostring(sip).c_str(), iaUser->login.c_str(), iaUser->protoVer, (iaUser->rnd + 1), connAck->rnd);
+    }
 return -1;
 }
 //-----------------------------------------------------------------------------
@@ -1200,13 +1184,22 @@ if ((iaUser->phase.GetPhase() == 2) && (connAck->rnd == iaUser->rnd + 1))
     else
         {
         errorStr = iaUser->user->GetStrError();
+        if (iaSettings.LogProtocolErrors())
+            logger("IP: %s. User '%s'. Protocol version: %d. CONN_ACK: phase 2, authorization error ('%s').", inet_ntostring(sip).c_str(), iaUser->login.c_str(), iaUser->protoVer, errorStr.c_str());
         iaUser->phase.SetPhase1();
         ip2user.erase(sip);
         printfd(__FILE__, "Phase changed from 2 to 1. Reason: failed to authorize user\n");
         return -1;
         }
     }
-printfd(__FILE__, "Invalid phase or control number. Phase: %d. Control number: %d\n", iaUser->phase.GetPhase(), connAck->rnd);
+printfd(__FILE__, "Invalid phase or control number. Phase: %d. Control number: %d, expected: %d\n", iaUser->phase.GetPhase(), connAck->rnd, iaUser->rnd + 1);
+if (iaSettings.LogProtocolErrors())
+    {
+    if (iaUser->phase.GetPhase() != 2)
+        logger("IP: %s. User '%s'. Protocol version: %d. CONN_ACK: invalid phase, expected 2, got %d.", inet_ntostring(sip).c_str(), iaUser->login.c_str(), iaUser->protoVer, iaUser->phase.GetPhase());
+    if (connAck->rnd != iaUser->rnd + 1)
+        logger("IP: %s. User '%s'. Protocol version: %d. CONN_ACK: invalid control number, expected %d, got %d.", inet_ntostring(sip).c_str(), iaUser->login.c_str(), iaUser->protoVer, (iaUser->rnd + 1), connAck->rnd);
+    }
 return -1;
 }
 //-----------------------------------------------------------------------------
@@ -1249,11 +1242,13 @@ if ((iaUser->phase.GetPhase() == 3) && (aliveAck->rnd == iaUser->rnd + 1))
 return 0;
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::Process_DISCONN_SYN_6(DISCONN_SYN_6 *, IA_USER * iaUser, uint32_t)
+int AUTH_IA::Process_DISCONN_SYN_6(DISCONN_SYN_6 *, IA_USER * iaUser, uint32_t sip)
 {
 printfd(__FILE__, "DISCONN_SYN_6\n");
 if (iaUser->phase.GetPhase() != 3)
     {
+    if (iaSettings.LogProtocolErrors())
+        logger("IP: %s. User '%s'. Protocol version: %d. DISCONN_SYN: invalid phase, expected 3, got %d.", inet_ntostring(sip).c_str(), iaUser->login.c_str(), iaUser->protoVer, iaUser->phase.GetPhase());
     printfd(__FILE__, "Invalid phase. Expected 3, actual %d\n", iaUser->phase.GetPhase());
     errorStr = "Incorrect request DISCONN_SYN";
     return -1;
@@ -1270,10 +1265,12 @@ int AUTH_IA::Process_DISCONN_SYN_7(DISCONN_SYN_7 * disconnSyn, IA_USER * iaUser,
 return Process_DISCONN_SYN_6(disconnSyn, iaUser, sip);
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::Process_DISCONN_SYN_8(DISCONN_SYN_8 *, IA_USER * iaUser, uint32_t)
+int AUTH_IA::Process_DISCONN_SYN_8(DISCONN_SYN_8 *, IA_USER * iaUser, uint32_t sip)
 {
 if (iaUser->phase.GetPhase() != 3)
     {
+    if (iaSettings.LogProtocolErrors())
+        logger("IP: %s. User '%s'. Protocol version: %d. DISCONN_SYN: invalid phase, expected 3, got %d.", inet_ntostring(sip).c_str(), iaUser->login.c_str(), iaUser->protoVer, iaUser->phase.GetPhase());
     errorStr = "Incorrect request DISCONN_SYN";
     printfd(__FILE__, "Invalid phase. Expected 3, actual %d\n", iaUser->phase.GetPhase());
     return -1;
@@ -1287,8 +1284,8 @@ return 0;
 //-----------------------------------------------------------------------------
 int AUTH_IA::Process_DISCONN_ACK_6(DISCONN_ACK_6 * disconnAck,
                                    IA_USER * iaUser,
-                                   uint32_t,
-                                   map<uint32_t, IA_USER>::iterator)
+                                   uint32_t sip,
+                                   std::map<uint32_t, IA_USER>::iterator)
 {
 #ifdef ARCH_BE
 SwapBytes(disconnAck->len);
@@ -1297,6 +1294,13 @@ SwapBytes(disconnAck->rnd);
 printfd(__FILE__, "DISCONN_ACK_6\n");
 if (!((iaUser->phase.GetPhase() == 4) && (disconnAck->rnd == iaUser->rnd + 1)))
     {
+    if (iaSettings.LogProtocolErrors())
+        {
+        if (iaUser->phase.GetPhase() != 4)
+            logger("IP: %s. User '%s'. Protocol version: %d. DISCONN_ACK: invalid phase, expected 4, got %d.", inet_ntostring(sip).c_str(), iaUser->login.c_str(), iaUser->protoVer, iaUser->phase.GetPhase());
+        if (disconnAck->rnd != iaUser->rnd + 1)
+            logger("IP: %s. User '%s'. Protocol version: %d. DISCONN_ACK: invalid control number, expected %d, got %d.", inet_ntostring(sip).c_str(), iaUser->login.c_str(), iaUser->protoVer, (iaUser->rnd + 1), disconnAck->rnd);
+        }
     printfd(__FILE__, "Invalid phase or control number. Phase: %d. Control number: %d\n", iaUser->phase.GetPhase(), disconnAck->rnd);
     return -1;
     }
@@ -1304,12 +1308,12 @@ if (!((iaUser->phase.GetPhase() == 4) && (disconnAck->rnd == iaUser->rnd + 1)))
 return 0;
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::Process_DISCONN_ACK_7(DISCONN_ACK_7 * disconnAck, IA_USER * iaUser, uint32_t sip, map<uint32_t, IA_USER>::iterator it)
+int AUTH_IA::Process_DISCONN_ACK_7(DISCONN_ACK_7 * disconnAck, IA_USER * iaUser, uint32_t sip, std::map<uint32_t, IA_USER>::iterator it)
 {
 return Process_DISCONN_ACK_6(disconnAck, iaUser, sip, it);
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::Process_DISCONN_ACK_8(DISCONN_ACK_8 * disconnAck, IA_USER * iaUser, uint32_t, map<uint32_t, IA_USER>::iterator)
+int AUTH_IA::Process_DISCONN_ACK_8(DISCONN_ACK_8 * disconnAck, IA_USER * iaUser, uint32_t sip, std::map<uint32_t, IA_USER>::iterator)
 {
 #ifdef ARCH_BE
 SwapBytes(disconnAck->len);
@@ -1318,6 +1322,13 @@ SwapBytes(disconnAck->rnd);
 printfd(__FILE__, "DISCONN_ACK_8\n");
 if (!((iaUser->phase.GetPhase() == 4) && (disconnAck->rnd == iaUser->rnd + 1)))
     {
+    if (iaSettings.LogProtocolErrors())
+        {
+        if (iaUser->phase.GetPhase() != 4)
+            logger("IP: %s. User '%s'. Protocol version: %d. DISCONN_ACK: invalid phase, expected 4, got %d.", inet_ntostring(sip).c_str(), iaUser->login.c_str(), iaUser->protoVer, iaUser->phase.GetPhase());
+        if (disconnAck->rnd != iaUser->rnd + 1)
+            logger("IP: %s. User '%s'. Protocol version: %d. DISCONN_ACK: invalid control number, expected %d, got %d.", inet_ntostring(sip).c_str(), iaUser->login.c_str(), iaUser->protoVer, (iaUser->rnd + 1), disconnAck->rnd);
+        }
     printfd(__FILE__, "Invalid phase or control number. Phase: %d. Control number: %d\n", iaUser->phase.GetPhase(), disconnAck->rnd);
     return -1;
     }
@@ -1330,22 +1341,24 @@ int AUTH_IA::Send_CONN_SYN_ACK_6(IA_USER * iaUser, uint32_t sip)
 //+++ Fill static data in connSynAck +++
 // TODO Move this code. It must be executed only once
 connSynAck6.len = Min8(sizeof(CONN_SYN_ACK_6));
-strcpy((char*)connSynAck6.type, "CONN_SYN_ACK");
+memcpy(connSynAck6.type, "CONN_SYN_ACK", 12);
 for (int j = 0; j < DIR_NUM; j++)
     {
-    strncpy((char*)connSynAck6.dirName[j],
-            stgSettings->GetDirName(j).c_str(),
-            sizeof(string16));
+    memcpy(connSynAck6.dirName[j],
+           stgSettings->GetDirName(j).c_str(),
+           std::min(stgSettings->GetDirName(j).length(), sizeof(string16)));
 
     connSynAck6.dirName[j][sizeof(string16) - 1] = 0;
     }
 //--- Fill static data in connSynAck ---
 
-iaUser->rnd = random();
+iaUser->rnd = static_cast<uint32_t>(random());
 connSynAck6.rnd = iaUser->rnd;
 
-connSynAck6.userTimeOut = iaSettings.GetUserTimeout();
-connSynAck6.aliveDelay = iaSettings.GetUserDelay();
+printfd(__FILE__, "Sending CONN_SYN_ACK with control number %d.\n", iaUser->rnd);
+
+connSynAck6.userTimeOut = iaSettings.GetUserTimeout().GetSec();
+connSynAck6.aliveDelay = iaSettings.GetUserDelay().GetSec();
 
 #ifdef ARCH_BE
 SwapBytes(connSynAck6.len);
@@ -1354,8 +1367,8 @@ SwapBytes(connSynAck6.userTimeOut);
 SwapBytes(connSynAck6.aliveDelay);
 #endif
 
-Encrypt(&iaUser->ctx, (char*)&connSynAck6, (char*)&connSynAck6, Min8(sizeof(CONN_SYN_ACK_6))/8);
-return Send(sip, iaSettings.GetUserPort(), (char*)&connSynAck6, Min8(sizeof(CONN_SYN_ACK_6)));;
+EncryptString(&connSynAck6, &connSynAck6, Min8(sizeof(CONN_SYN_ACK_6)), &iaUser->ctx);
+return Send(sip, iaSettings.GetUserPort(), &connSynAck6, Min8(sizeof(CONN_SYN_ACK_6)));;
 }
 //-----------------------------------------------------------------------------
 int AUTH_IA::Send_CONN_SYN_ACK_7(IA_USER * iaUser, uint32_t sip)
@@ -1365,29 +1378,31 @@ return Send_CONN_SYN_ACK_6(iaUser, sip);
 //-----------------------------------------------------------------------------
 int AUTH_IA::Send_CONN_SYN_ACK_8(IA_USER * iaUser, uint32_t sip)
 {
-strcpy((char*)connSynAck8.hdr.magic, IA_ID);
+memcpy(connSynAck8.hdr.magic, IA_ID, strlen(IA_ID));
 connSynAck8.hdr.protoVer[0] = 0;
 connSynAck8.hdr.protoVer[1] = 8;
 
 //+++ Fill static data in connSynAck +++
 // TODO Move this code. It must be executed only once
 connSynAck8.len = Min8(sizeof(CONN_SYN_ACK_8));
-strcpy((char*)connSynAck8.type, "CONN_SYN_ACK");
+memcpy(connSynAck8.type, "CONN_SYN_ACK", 12);
 for (int j = 0; j < DIR_NUM; j++)
     {
-    strncpy((char*)connSynAck8.dirName[j],
-            stgSettings->GetDirName(j).c_str(),
-            sizeof(string16));
+    memcpy(connSynAck8.dirName[j],
+           stgSettings->GetDirName(j).c_str(),
+           std::min(stgSettings->GetDirName(j).length(), sizeof(string16)));
 
     connSynAck8.dirName[j][sizeof(string16) - 1] = 0;
     }
 //--- Fill static data in connSynAck ---
 
-iaUser->rnd = random();
+iaUser->rnd = static_cast<uint32_t>(random());
 connSynAck8.rnd = iaUser->rnd;
 
-connSynAck8.userTimeOut = iaSettings.GetUserTimeout();
-connSynAck8.aliveDelay = iaSettings.GetUserDelay();
+printfd(__FILE__, "Sending CONN_SYN_ACK with control number %d.\n", iaUser->rnd);
+
+connSynAck8.userTimeOut = iaSettings.GetUserTimeout().GetSec();
+connSynAck8.aliveDelay = iaSettings.GetUserDelay().GetSec();
 
 #ifdef ARCH_BE
 SwapBytes(connSynAck8.len);
@@ -1396,21 +1411,21 @@ SwapBytes(connSynAck8.userTimeOut);
 SwapBytes(connSynAck8.aliveDelay);
 #endif
 
-Encrypt(&iaUser->ctx, (char*)&connSynAck8, (char*)&connSynAck8, Min8(sizeof(CONN_SYN_ACK_8))/8);
-return Send(sip, iaUser->port, (char*)&connSynAck8, Min8(sizeof(CONN_SYN_ACK_8)));
+EncryptString(&connSynAck8, &connSynAck8, Min8(sizeof(CONN_SYN_ACK_8)), &iaUser->ctx);
+return Send(sip, iaUser->port, &connSynAck8, Min8(sizeof(CONN_SYN_ACK_8)));
 }
 //-----------------------------------------------------------------------------
 int AUTH_IA::Send_ALIVE_SYN_6(IA_USER * iaUser, uint32_t sip)
 {
 aliveSyn6.len = Min8(sizeof(ALIVE_SYN_6));
-aliveSyn6.rnd = iaUser->rnd = random();
+aliveSyn6.rnd = iaUser->rnd = static_cast<uint32_t>(random());
 
-strcpy((char*)aliveSyn6.type, "ALIVE_SYN");
+memcpy(aliveSyn6.type, "ALIVE_SYN", 9);
 
 for (int i = 0; i < DIR_NUM; i++)
     {
-    aliveSyn6.md[i] = iaUser->user->GetProperty().down.Get()[i];
-    aliveSyn6.mu[i] = iaUser->user->GetProperty().up.Get()[i];
+    aliveSyn6.md[i] = iaUser->user->GetProperties().down.Get()[i];
+    aliveSyn6.mu[i] = iaUser->user->GetProperties().up.Get()[i];
 
     aliveSyn6.sd[i] = iaUser->user->GetSessionDownload()[i];
     aliveSyn6.su[i] = iaUser->user->GetSessionUpload()[i];
@@ -1418,7 +1433,7 @@ for (int i = 0; i < DIR_NUM; i++)
 
 //TODO
 int dn = iaSettings.GetFreeMbShowType();
-const TARIFF * tf = iaUser->user->GetTariff();
+const auto tf = iaUser->user->GetTariff();
 
 if (dn < DIR_NUM)
     {
@@ -1426,16 +1441,16 @@ if (dn < DIR_NUM)
                                          aliveSyn6.md[dn],
                                          dn,
                                          stgTime);
-    p *= (1024 * 1024);
-    if (p == 0)
+    p *= 1024 * 1024;
+    if (std::fabs(p) < 1.0e-3)
         {
-        snprintf((char*)aliveSyn6.freeMb, IA_FREEMB_LEN, "---");
+        memcpy(aliveSyn6.freeMb, "---", 3);
         }
     else
         {
-        double fmb = iaUser->user->GetProperty().freeMb;
+        double fmb = iaUser->user->GetProperties().freeMb;
         fmb = fmb < 0 ? 0 : fmb;
-        snprintf((char*)aliveSyn6.freeMb, IA_FREEMB_LEN, "%.3f", fmb / p);
+        snprintf(reinterpret_cast<char*>(aliveSyn6.freeMb), IA_FREEMB_LEN, "%.3f", fmb / p);
         }
     }
 else
@@ -1446,9 +1461,9 @@ else
         }
     else
         {
-        double fmb = iaUser->user->GetProperty().freeMb;
+        double fmb = iaUser->user->GetProperties().freeMb;
         fmb = fmb < 0 ? 0 : fmb;
-        snprintf((char*)aliveSyn6.freeMb, IA_FREEMB_LEN, "C%.3f", fmb);
+        snprintf(reinterpret_cast<char*>(aliveSyn6.freeMb), IA_FREEMB_LEN, "C%.3f", fmb);
         }
     }
 
@@ -1460,9 +1475,9 @@ if (iaUser->aliveSent)
 iaUser->aliveSent = true;
 #endif
 
-aliveSyn6.cash =(int64_t) (iaUser->user->GetProperty().cash.Get() * 1000.0);
+aliveSyn6.cash = static_cast<int64_t>(iaUser->user->GetProperties().cash.Get() * 1000.0);
 if (!stgSettings->GetShowFeeInCash())
-    aliveSyn6.cash -= (int64_t)(tf->GetFee() * 1000.0);
+    aliveSyn6.cash -= static_cast<int64_t>((tf->GetFee() * 1000.0));
 
 #ifdef ARCH_BE
 SwapBytes(aliveSyn6.len);
@@ -1477,8 +1492,8 @@ for (int i = 0; i < DIR_NUM; ++i)
     }
 #endif
 
-Encrypt(&(iaUser->ctx), (char*)&aliveSyn6, (char*)&aliveSyn6, Min8(sizeof(aliveSyn6))/8);
-return Send(sip, iaSettings.GetUserPort(), (char*)&aliveSyn6, Min8(sizeof(aliveSyn6)));
+EncryptString(&aliveSyn6, &aliveSyn6, Min8(sizeof(aliveSyn6)), &iaUser->ctx);
+return Send(sip, iaSettings.GetUserPort(), &aliveSyn6, Min8(sizeof(aliveSyn6)));
 }
 //-----------------------------------------------------------------------------
 int AUTH_IA::Send_ALIVE_SYN_7(IA_USER * iaUser, uint32_t sip)
@@ -1488,19 +1503,19 @@ return Send_ALIVE_SYN_6(iaUser, sip);
 //-----------------------------------------------------------------------------
 int AUTH_IA::Send_ALIVE_SYN_8(IA_USER * iaUser, uint32_t sip)
 {
-strcpy((char*)aliveSyn8.hdr.magic, IA_ID);
+memcpy(aliveSyn8.hdr.magic, IA_ID, strlen(IA_ID));
 aliveSyn8.hdr.protoVer[0] = 0;
 aliveSyn8.hdr.protoVer[1] = 8;
 
 aliveSyn8.len = Min8(sizeof(ALIVE_SYN_8));
-aliveSyn8.rnd = iaUser->rnd = random();
+aliveSyn8.rnd = iaUser->rnd = static_cast<uint32_t>(random());
 
-strcpy((char*)aliveSyn8.type, "ALIVE_SYN");
+memcpy(aliveSyn8.type, "ALIVE_SYN", 9);
 
 for (int i = 0; i < DIR_NUM; i++)
     {
-    aliveSyn8.md[i] = iaUser->user->GetProperty().down.Get()[i];
-    aliveSyn8.mu[i] = iaUser->user->GetProperty().up.Get()[i];
+    aliveSyn8.md[i] = iaUser->user->GetProperties().down.Get()[i];
+    aliveSyn8.mu[i] = iaUser->user->GetProperties().up.Get()[i];
 
     aliveSyn8.sd[i] = iaUser->user->GetSessionDownload()[i];
     aliveSyn8.su[i] = iaUser->user->GetSessionUpload()[i];
@@ -1511,21 +1526,21 @@ int dn = iaSettings.GetFreeMbShowType();
 
 if (dn < DIR_NUM)
     {
-    const TARIFF * tf = iaUser->user->GetTariff();
+    const auto tf = iaUser->user->GetTariff();
     double p = tf->GetPriceWithTraffType(aliveSyn8.mu[dn],
                                          aliveSyn8.md[dn],
                                          dn,
                                          stgTime);
-    p *= (1024 * 1024);
-    if (p == 0)
+    p *= 1024 * 1024;
+    if (std::fabs(p) < 1.0e-3)
         {
-        snprintf((char*)aliveSyn8.freeMb, IA_FREEMB_LEN, "---");
+        memcpy(aliveSyn8.freeMb, "---", 3);
         }
     else
         {
-        double fmb = iaUser->user->GetProperty().freeMb;
+        double fmb = iaUser->user->GetProperties().freeMb;
         fmb = fmb < 0 ? 0 : fmb;
-        snprintf((char*)aliveSyn8.freeMb, IA_FREEMB_LEN, "%.3f", fmb / p);
+        snprintf(reinterpret_cast<char*>(aliveSyn8.freeMb), IA_FREEMB_LEN, "%.3f", fmb / p);
         }
     }
 else
@@ -1536,9 +1551,9 @@ else
         }
     else
         {
-        double fmb = iaUser->user->GetProperty().freeMb;
+        double fmb = iaUser->user->GetProperties().freeMb;
         fmb = fmb < 0 ? 0 : fmb;
-        snprintf((char*)aliveSyn8.freeMb, IA_FREEMB_LEN, "C%.3f", fmb);
+        snprintf(reinterpret_cast<char*>(aliveSyn8.freeMb), IA_FREEMB_LEN, "C%.3f", fmb);
         }
     }
 
@@ -1550,11 +1565,11 @@ if (iaUser->aliveSent)
 iaUser->aliveSent = true;
 #endif
 
-const TARIFF * tf = iaUser->user->GetTariff();
+const auto tf = iaUser->user->GetTariff();
 
-aliveSyn8.cash =(int64_t) (iaUser->user->GetProperty().cash.Get() * 1000.0);
+aliveSyn8.cash = static_cast<int64_t>(iaUser->user->GetProperties().cash.Get() * 1000.0);
 if (!stgSettings->GetShowFeeInCash())
-    aliveSyn8.cash -= (int64_t)(tf->GetFee() * 1000.0);
+    aliveSyn8.cash -= static_cast<int64_t>(tf->GetFee() * 1000.0);
 
 #ifdef ARCH_BE
 SwapBytes(aliveSyn8.len);
@@ -1570,23 +1585,23 @@ for (int i = 0; i < DIR_NUM; ++i)
     }
 #endif
 
-Encrypt(&(iaUser->ctx), (char*)&aliveSyn8, (char*)&aliveSyn8, Min8(sizeof(aliveSyn8))/8);
-return Send(sip, iaUser->port, (char*)&aliveSyn8, Min8(sizeof(aliveSyn8)));
+EncryptString(&aliveSyn8, &aliveSyn8, Min8(sizeof(aliveSyn8)), &iaUser->ctx);
+return Send(sip, iaUser->port, &aliveSyn8, Min8(sizeof(aliveSyn8)));
 }
 //-----------------------------------------------------------------------------
 int AUTH_IA::Send_DISCONN_SYN_ACK_6(IA_USER * iaUser, uint32_t sip)
 {
 disconnSynAck6.len = Min8(sizeof(DISCONN_SYN_ACK_6));
-strcpy((char*)disconnSynAck6.type, "DISCONN_SYN_ACK");
-disconnSynAck6.rnd = iaUser->rnd = random();
+memcpy(disconnSynAck6.type, "DISCONN_SYN_ACK", 15);
+disconnSynAck6.rnd = iaUser->rnd = static_cast<uint32_t>(random());
 
 #ifdef ARCH_BE
 SwapBytes(disconnSynAck6.len);
 SwapBytes(disconnSynAck6.rnd);
 #endif
 
-Encrypt(&iaUser->ctx, (char*)&disconnSynAck6, (char*)&disconnSynAck6, Min8(sizeof(disconnSynAck6))/8);
-return Send(sip, iaSettings.GetUserPort(), (char*)&disconnSynAck6, Min8(sizeof(disconnSynAck6)));
+EncryptString(&disconnSynAck6, &disconnSynAck6, Min8(sizeof(disconnSynAck6)), &iaUser->ctx);
+return Send(sip, iaSettings.GetUserPort(), &disconnSynAck6, Min8(sizeof(disconnSynAck6)));
 }
 //-----------------------------------------------------------------------------
 int AUTH_IA::Send_DISCONN_SYN_ACK_7(IA_USER * iaUser, uint32_t sip)
@@ -1596,93 +1611,70 @@ return Send_DISCONN_SYN_ACK_6(iaUser, sip);
 //-----------------------------------------------------------------------------
 int AUTH_IA::Send_DISCONN_SYN_ACK_8(IA_USER * iaUser, uint32_t sip)
 {
-strcpy((char*)disconnSynAck8.hdr.magic, IA_ID);
+memcpy(disconnSynAck8.hdr.magic, IA_ID, strlen(IA_ID));
 disconnSynAck8.hdr.protoVer[0] = 0;
 disconnSynAck8.hdr.protoVer[1] = 8;
 
 disconnSynAck8.len = Min8(sizeof(DISCONN_SYN_ACK_8));
-strcpy((char*)disconnSynAck8.type, "DISCONN_SYN_ACK");
-disconnSynAck8.rnd = iaUser->rnd = random();
+memcpy(disconnSynAck8.type, "DISCONN_SYN_ACK", 15);
+disconnSynAck8.rnd = iaUser->rnd = static_cast<uint32_t>(random());
 
 #ifdef ARCH_BE
 SwapBytes(disconnSynAck8.len);
 SwapBytes(disconnSynAck8.rnd);
 #endif
 
-Encrypt(&iaUser->ctx, (char*)&disconnSynAck8, (char*)&disconnSynAck8, Min8(sizeof(disconnSynAck8))/8);
-return Send(sip, iaUser->port, (char*)&disconnSynAck8, Min8(sizeof(disconnSynAck8)));
+EncryptString(&disconnSynAck8, &disconnSynAck8, Min8(sizeof(disconnSynAck8)), &iaUser->ctx);
+return Send(sip, iaUser->port, &disconnSynAck8, Min8(sizeof(disconnSynAck8)));
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::Send_FIN_6(IA_USER * iaUser, uint32_t sip, map<uint32_t, IA_USER>::iterator it)
+int AUTH_IA::Send_FIN_6(IA_USER * iaUser, uint32_t sip, std::map<uint32_t, IA_USER>::iterator it)
 {
 fin6.len = Min8(sizeof(FIN_6));
-strcpy((char*)fin6.type, "FIN");
-strcpy((char*)fin6.ok, "OK");
+memcpy(fin6.type, "FIN", 3);
+memcpy(fin6.ok, "OK", 2);
 
 #ifdef ARCH_BE
 SwapBytes(fin6.len);
 #endif
 
-Encrypt(&iaUser->ctx, (char*)&fin6, (char*)&fin6, Min8(sizeof(fin6))/8);
+EncryptString(&fin6, &fin6, Min8(sizeof(fin6)), &iaUser->ctx);
 
 users->Unauthorize(iaUser->login, this);
 
-int res = Send(sip, iaSettings.GetUserPort(), (char*)&fin6, Min8(sizeof(fin6)));
+int res = Send(sip, iaSettings.GetUserPort(), &fin6, Min8(sizeof(fin6)));
 
 ip2user.erase(it);
 
 return res;
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::Send_FIN_7(IA_USER * iaUser, uint32_t sip, map<uint32_t, IA_USER>::iterator it)
+int AUTH_IA::Send_FIN_7(IA_USER * iaUser, uint32_t sip, std::map<uint32_t, IA_USER>::iterator it)
 {
 return Send_FIN_6(iaUser, sip, it);
 }
 //-----------------------------------------------------------------------------
-int AUTH_IA::Send_FIN_8(IA_USER * iaUser, uint32_t sip, map<uint32_t, IA_USER>::iterator it)
+int AUTH_IA::Send_FIN_8(IA_USER * iaUser, uint32_t sip, std::map<uint32_t, IA_USER>::iterator it)
 {
-strcpy((char*)fin8.hdr.magic, IA_ID);
+memcpy(fin8.hdr.magic, IA_ID, strlen(IA_ID));
 fin8.hdr.protoVer[0] = 0;
 fin8.hdr.protoVer[1] = 8;
 
 fin8.len = Min8(sizeof(FIN_8));
-strcpy((char*)fin8.type, "FIN");
-strcpy((char*)fin8.ok, "OK");
+memcpy(fin8.type, "FIN", 3);
+memcpy(fin8.ok, "OK", 2);
 
 #ifdef ARCH_BE
 SwapBytes(fin8.len);
 #endif
 
-Encrypt(&iaUser->ctx, (char*)&fin8, (char*)&fin8, Min8(sizeof(fin8))/8);
+EncryptString(&fin8, &fin8, Min8(sizeof(fin8)), &iaUser->ctx);
 
 users->Unauthorize(iaUser->login, this);
 
-int res = Send(sip, iaUser->port, (char*)&fin8, Min8(sizeof(fin8)));
+int res = Send(sip, iaUser->port, &fin8, Min8(sizeof(fin8)));
 
 ip2user.erase(it);
 
 return res;
 }
-//-----------------------------------------------------------------------------
-inline
-void InitEncrypt(BLOWFISH_CTX * ctx, const string & password)
-{
-unsigned char keyL[PASSWD_LEN];
-memset(keyL, 0, PASSWD_LEN);
-strncpy((char *)keyL, password.c_str(), PASSWD_LEN);
-Blowfish_Init(ctx, keyL, PASSWD_LEN);
-}
-//-----------------------------------------------------------------------------
-inline
-void Decrypt(BLOWFISH_CTX * ctx, char * dst, const char * src, int len8)
-{
-for (int i = 0; i < len8; i++)
-    DecodeString(dst + i * 8, src + i * 8, ctx);
-}
-//-----------------------------------------------------------------------------
-inline
-void Encrypt(BLOWFISH_CTX * ctx, char * dst, const char * src, int len8)
-{
-for (int i = 0; i < len8; i++)
-    EncodeString(dst + i * 8, src + i * 8, ctx);
-}