X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/28e38ce4f9f1a88ea4bed4fa008ed72aa7f75450..f5e4a84330b742c6ad8106f98998ba165671326d:/projects/stargazer/plugins/authorization/inetaccess/inetaccess.cpp

diff --git a/projects/stargazer/plugins/authorization/inetaccess/inetaccess.cpp b/projects/stargazer/plugins/authorization/inetaccess/inetaccess.cpp
index 6219a1a8..f64211d0 100644
--- a/projects/stargazer/plugins/authorization/inetaccess/inetaccess.cpp
+++ b/projects/stargazer/plugins/authorization/inetaccess/inetaccess.cpp
@@ -30,12 +30,13 @@
 
 #include <sys/types.h>
 #include <sys/socket.h>
-#include <unistd.h> // usleep, close
+#include <unistd.h> // close
 
 #include <csignal>
 #include <cstdlib>
 #include <cstdio> // snprintf
 #include <cerrno>
+#include <cmath>
 #include <algorithm>
 
 #include "stg/common.h"
@@ -46,16 +47,19 @@
 #include "stg/plugin_creator.h"
 #include "inetaccess.h"
 
-extern volatile const time_t stgTime;
-
-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;
 
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
+namespace
+{
 PLUGIN_CREATOR<AUTH_IA> iac;
+
+void InitEncrypt(BLOWFISH_CTX * ctx, const std::string & password);
+}
+
+extern "C" PLUGIN * GetPlugin();
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
@@ -70,7 +74,9 @@ AUTH_IA_SETTINGS::AUTH_IA_SETTINGS()
     : userDelay(0),
       userTimeout(0),
       port(0),
-      freeMbShowType(freeMbCash)
+      errorStr(),
+      freeMbShowType(freeMbCash),
+      logProtocolErrors(false)
 {
 }
 //-----------------------------------------------------------------------------
@@ -78,7 +84,7 @@ int AUTH_IA_SETTINGS::ParseSettings(const MODULE_SETTINGS & s)
 {
 int p;
 PARAM_VALUE pv;
-vector<PARAM_VALUE>::const_iterator pvi;
+std::vector<PARAM_VALUE>::const_iterator pvi;
 ///////////////////////////
 pv.param = "Port";
 pvi = find(s.moduleParams.begin(), s.moduleParams.end(), pv);
@@ -94,7 +100,7 @@ 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);
@@ -127,8 +133,19 @@ 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())
+    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);
@@ -173,13 +190,15 @@ 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)
+    : phase(1),
+      phaseTime()
 {
 gettimeofday(&phaseTime, NULL);
 }
@@ -213,8 +232,6 @@ void IA_PHASE::WritePhaseChange(int newPhase)
 UTIME newPhaseTime;
 gettimeofday(&newPhaseTime, NULL);
 flog = fopen(log.c_str(), "at");
-/*int64_t tn = newPhaseTime.GetSec()*1000000 + newPhaseTime.GetUSec();
-int64_t to = phaseTime.GetSec()*1000000 + phaseTime.GetUSec();*/
 if (flog)
     {
     string action = newPhase == phase ? "U" : "C";
@@ -267,15 +284,6 @@ 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;
@@ -297,17 +305,34 @@ return phaseTime;
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 AUTH_IA::AUTH_IA()
-    : nonstop(false),
+    : ctxS(),
+      errorStr(),
+      iaSettings(),
+      settings(),
+      nonstop(false),
       isRunningRun(false),
       isRunningRunTimeouter(false),
       users(NULL),
       stgSettings(NULL),
+      ip2user(),
+      recvThread(),
+      timeouterThread(),
+      mutex(),
       listenSocket(-1),
-      WriteServLog(GetStgLogger()),
+      connSynAck6(),
+      connSynAck8(),
+      disconnSynAck6(),
+      disconnSynAck8(),
+      aliveSyn6(),
+      aliveSyn8(),
+      fin6(),
+      fin8(),
+      packetTypes(),
       enabledDirs(0xFFffFFff),
-      onDelUserNotifier(*this)
+      onDelUserNotifier(*this),
+      logger(GetPluginLogger(GetStgLogger(), "auth_ia"))
 {
-InitEncrypt(&ctxS, "pr7Hhen");
+InitContext("pr7Hhen", 7, &ctxS);
 
 pthread_mutexattr_t attr;
 pthread_mutexattr_init(&attr);
@@ -375,6 +400,7 @@ if (!isRunningRun)
         {
         errorStr = "Cannot create thread.";
         printfd(__FILE__, "Cannot create recv thread\n");
+        logger("Cannot create recv thread.");
         return -1;
         }
     }
@@ -385,6 +411,7 @@ if (!isRunningRunTimeouter)
         {
         errorStr = "Cannot create thread.";
         printfd(__FILE__, "Cannot create timeouter thread\n");
+        logger("Cannot create timeouter thread.");
         return -1;
         }
     }
@@ -410,30 +437,8 @@ if (isRunningRun)
     //5 seconds to thread stops itself
     for (int i = 0; i < 25 && isRunningRun; i++)
         {
-        usleep(200000);
-        }
-
-    //after 5 seconds waiting thread still running. now killing it
-    if (isRunningRun)
-        {
-        //TODO pthread_cancel()
-        if (pthread_kill(recvThread, SIGINT))
-            {
-            errorStr = "Cannot kill thread.";
-            printfd(__FILE__, "Cannot kill thread\n");
-            return -1;
-            }
-        for (int i = 0; i < 25 && isRunningRun; ++i)
-            usleep(200000);
-        if (isRunningRun)
-            {
-            printfd(__FILE__, "Failed to stop recv thread\n");
-            }
-        else
-            {
-            pthread_join(recvThread, NULL);
-            }
-        printfd(__FILE__, "AUTH_IA killed Run\n");
+        struct timespec ts = {0, 200000000};
+        nanosleep(&ts, NULL);
         }
     }
 
@@ -444,38 +449,26 @@ if (isRunningRunTimeouter)
     //5 seconds to thread stops itself
     for (int i = 0; i < 25 && isRunningRunTimeouter; i++)
         {
-        usleep(200000);
-        }
-
-    //after 5 seconds waiting thread still running. now killing it
-    if (isRunningRunTimeouter)
-        {
-        //TODO pthread_cancel()
-        if (pthread_kill(timeouterThread, SIGINT))
-            {
-            errorStr = "Cannot kill thread.";
-            return -1;
-            }
-        for (int i = 0; i < 25 && isRunningRunTimeouter; ++i)
-            usleep(200000);
-        if (isRunningRunTimeouter)
-            {
-            printfd(__FILE__, "Failed to stop timeouter thread\n");
-            }
-        else
-            {
-            pthread_join(timeouterThread, NULL);
-            }
-        printfd(__FILE__, "AUTH_IA killed Timeouter\n");
+        struct timespec ts = {0, 200000000};
+        nanosleep(&ts, NULL);
         }
     }
-printfd(__FILE__, "AUTH_IA::Stoped successfully.\n");
+
 users->DelNotifierUserDel(&onDelUserNotifier);
+
+if (isRunningRun || isRunningRunTimeouter)
+    return -1;
+
+printfd(__FILE__, "AUTH_IA::Stoped successfully.\n");
 return 0;
 }
 //-----------------------------------------------------------------------------
 void * AUTH_IA::Run(void * d)
 {
+sigset_t signalSet;
+sigfillset(&signalSet);
+pthread_sigmask(SIG_BLOCK, &signalSet, NULL);
+
 AUTH_IA * ia = static_cast<AUTH_IA *>(d);
 
 ia->isRunningRun = true;
@@ -490,7 +483,7 @@ while (ia->nonstop)
     if ((touchTime + MONITOR_TIME_DELAY_SEC <= stgTime) && ia->stgSettings->GetMonitoring())
         {
         touchTime = stgTime;
-        string monFile = ia->stgSettings->GetMonitorDir() + "/inetaccess_r";
+        std::string monFile = ia->stgSettings->GetMonitorDir() + "/inetaccess_r";
         TouchFile(monFile.c_str());
         }
     }
@@ -501,18 +494,23 @@ return NULL;
 //-----------------------------------------------------------------------------
 void * AUTH_IA::RunTimeouter(void * d)
 {
+sigset_t signalSet;
+sigfillset(&signalSet);
+pthread_sigmask(SIG_BLOCK, &signalSet, NULL);
+
 AUTH_IA * ia = static_cast<AUTH_IA *>(d);
 
 ia->isRunningRunTimeouter = true;
 
 int a = -1;
-string monFile = ia->stgSettings->GetMonitorDir() + "/inetaccess_t";
+std::string monFile = ia->stgSettings->GetMonitorDir() + "/inetaccess_t";
 while (ia->nonstop)
     {
-    usleep(20000);
+    struct timespec ts = {0, 20000000};
+    nanosleep(&ts, NULL);
     ia->Timeouter();
-    // TODO cahange counter to timer and MONITOR_TIME_DELAY_SEC
-    if (++a % (50*60) == 0 && ia->stgSettings->GetMonitoring())
+    // TODO change counter to timer and MONITOR_TIME_DELAY_SEC
+    if (++a % (50 * 60) == 0 && ia->stgSettings->GetMonitoring())
         {
         TouchFile(monFile.c_str());
         }
@@ -539,29 +537,21 @@ listenSocket = socket(AF_INET, SOCK_DGRAM, 0);
 if (listenSocket < 0)
     {
     errorStr = "Cannot create socket.";
+    logger("Cannot create a socket: %s", strerror(errno));
     return -1;
     }
 
 listenAddr.sin_family = AF_INET;
-listenAddr.sin_port = htons(iaSettings.GetUserPort());
+listenAddr.sin_port = htons(static_cast<uint16_t>(iaSettings.GetUserPort()));
 listenAddr.sin_addr.s_addr = inet_addr("0.0.0.0");
 
 if (bind(listenSocket, (struct sockaddr*)&listenAddr, sizeof(listenAddr)) < 0)
     {
     errorStr = "AUTH_IA: Bind failed.";
+    logger("Cannot bind the socket: %s", strerror(errno));
     return -1;
     }
 
-/*int buffLen;
-if (getsockopt(listenSocket, SOL_SOCKET, SO_SNDBUF, &buffLen, sizeof(buffLen)) < 0)
-    {
-
-    errorStr = "Getsockopt failed. " + string(strerror(errno));
-    return -1;
-    }*/
-
-//WriteServLog("buffLen = %d", buffLen);
-
 return 0;
 }
 //-----------------------------------------------------------------------------
@@ -580,7 +570,7 @@ 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, (struct sockaddr *)&outerAddr, &outerAddrLen);
 
 if (!dataLen) // EOF
     {
@@ -592,6 +582,7 @@ 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;
@@ -600,59 +591,82 @@ 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);
-
-uint32_t sip = *((uint32_t*)&outerAddr.sin_addr);
-uint16_t sport = htons(outerAddr.sin_port);
+DecryptString(login, buffer + 8, PASSWD_LEN, &ctxS);
 
 USER_PTR user;
-if (users->FindByName(login, &user) == 0)
+if (users->FindByName(login, &user))
     {
-    printfd(__FILE__, "User %s FOUND!\n", user->GetLogin().c_str());
-    PacketProcessor(buffer, dataLen, sip, sport, protoVer, &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, IconvString("Неправильный логин.", "utf8", "koi8-ru"));
+    return -1;
     }
-else
+
+printfd(__FILE__, "User '%s' FOUND!\n", user->GetLogin().c_str());
+
+if (user->GetProperty().disabled.Get())
     {
-    WriteServLog("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 ÉÌÉ ÐÁÒÏÌØ!");
+    logger("Cannont authorize '%s', user is disabled.", login);
+    SendError(sip, sport, protoVer, IconvString("Учетная запись заблокирована.", "utf8", "koi8-ru"));
+    return 0;
     }
 
-return 0;
+if (user->GetProperty().passive.Get())
+    {
+    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))
+    {
+    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, 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
@@ -664,15 +678,14 @@ return 0;
 //-----------------------------------------------------------------------------
 int AUTH_IA::Timeouter()
 {
-STG_LOCKER lock(&mutex, __FILE__, __LINE__);
+STG_LOCKER lock(&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);
@@ -680,8 +693,12 @@ 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());
         it->second.phase.SetPhase1();
         printfd(__FILE__, "Phase changed from 2 to 1. Reason: timeout\n");
+        ip2user.erase(it++);
+        continue;
         }
 
     if (it->second.phase.GetPhase() == 3)
@@ -720,7 +737,9 @@ while (it != ip2user.end())
 
         if ((currTime - it->second.phase.GetTime()) > iaSettings.GetUserTimeout())
             {
-            it->second.user->Unauthorize(this);
+            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());
+            users->Unauthorize(it->second.user->GetLogin(), this);
             ip2user.erase(it++);
             continue;
             }
@@ -729,6 +748,8 @@ 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());
         it->second.phase.SetPhase3();
         printfd(__FILE__, "Phase changed from 4 to 3. Reason: timeout\n");
         }
@@ -739,289 +760,200 @@ 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, USER_PTR user)
 {
-STG_LOCKER lock(&mutex, __FILE__, __LINE__);
-// ôÕÔ ÓÏÂÒÁÎÙ ÏÂÒÁÂÏÔÞÉËÉ ÒÁÚÎÙÈ ÐÁËÅÔÏ×
-int pn = -1;
-const int offset = LOGIN_LEN + 2 + 6; // LOGIN_LEN + sizeOfMagic + sizeOfVer;
-
-IA_USER * iaUser = NULL;
-
-CONN_SYN_6 * connSyn6;
-CONN_SYN_7 * connSyn7;
-CONN_SYN_8 * connSyn8;
-
-CONN_ACK_6 * connAck;
-ALIVE_ACK_6 * aliveAck;
-DISCONN_SYN_6 * disconnSyn;
-DISCONN_ACK_6 * disconnAck;
+std::string login(user->GetLogin());
+const size_t offset = LOGIN_LEN + 2 + 6; // LOGIN_LEN + sizeOfMagic + sizeOfVer;
 
-map<uint32_t, IA_USER>::iterator it;
-it = ip2user.find(sip);
+STG_LOCKER lock(&mutex);
+std::map<uint32_t, IA_USER>::iterator it(ip2user.find(sip));
 
-if (it == ip2user.end() || (*user)->GetID() != it->second.user->GetID())
+if (it == ip2user.end())
     {
-    // åÝÅ ÎÅ ÂÙÌÏ ÚÁÐÒÏÓÏ× Ó ÜÔÏÇÏ IP
-    printfd(__FILE__, "Add new user\n");
-    ip2user[sip].protoVer = protoVer;
-    ip2user[sip].user = *user;
-    ip2user[sip].port = sport;
-    #ifdef IA_PHASE_DEBUG
-    ip2user[sip].phase.SetLogFileName(stgSettings->GetLogFileName());
-    ip2user[sip].phase.SetUserLogin((*user)->GetLogin());
-    #endif
-
-
-    it = ip2user.find(sip); //TODO
-    if (it == ip2user.end())
+    USER_PTR userPtr;
+    if (!users->FindByIPIdx(sip, &userPtr))
         {
-        printfd(__FILE__, "+++ ERROR +++\n");
-        return -1;
+        if (userPtr->GetID() != user->GetID())
+            {
+            printfd(__FILE__, "IP address already in use by user '%s'. IP %s, login: '%s'\n",
+                    userPtr->GetLogin().c_str(),
+                    inet_ntostring(sip).c_str(),
+                   login.c_str());
+            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, IconvString("IP-адрес уже сипользуется.", "utf8", "koi8-ru"));
+            return 0;
+            }
         }
-    }
 
-iaUser = &(it->second);
+    printfd(__FILE__, "Add new user '%s' from ip %s\n",
+            login.c_str(), inet_ntostring(sip).c_str());
+    std::pair<std::map<uint32_t, IA_USER>::iterator, bool> res;
+    res = ip2user.insert(std::make_pair(sip, IA_USER(login, user, sport, protoVer)));
+    it = res.first;
+    #ifdef IA_PHASE_DEBUG
+    it->second.phase.SetLogFileName(stgSettings->GetLogFileName());
+    it->second.phase.SetUserLogin(login);
+    #endif
+    }
+else if (user->GetID() != it->second.user->GetID())
+    {
+    printfd(__FILE__, "IP address already in use by user '%s'. IP %s, login: '%s'\n",
+            it->second.user->GetLogin().c_str(),
+            inet_ntostring(sip).c_str(),
+            user->GetLogin().c_str());
+    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, IconvString("IP-адрес уже используется.", "utf8", "koi8-ru"));
+    return 0;
+    }
 
-if (iaUser->port != sport)
-    iaUser->port = sport;
+IA_USER * iaUser = &(it->second);
 
-if (iaUser->password != (*user)->GetProperty().password.Get())
+if (iaUser->password != user->GetProperty().password.Get())
     {
-    InitEncrypt(&iaUser->ctx, (*user)->GetProperty().password.Get());
-    iaUser->password = (*user)->GetProperty().password.Get();
+    const std::string & password = user->GetProperty().password.Get();
+    InitContext(password.c_str(), password.length(), &iaUser->ctx);
+    iaUser->password = user->GetProperty().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;
-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");
-    WriteServLog("User's connect failed. IP \'%s\'. Wrong login or password", inet_ntostring(sip).c_str());
-    return 0;
-    }
-else
-    {
-    pn = pi->second;
-    }
-
-if ((*user)->GetProperty().disabled.Get())
-    {
-    SendError(sip, sport, protoVer, "õÞÅÔÎÁÑ ÚÁÐÉÓØ ÚÁÂÌÏËÉÒÏ×ÁÎÁ");
-    return 0;
-    }
-
-if ((*user)->GetProperty().passive.Get())
-    {
-    SendError(sip, sport, protoVer, "õÞÅÔÎÁÑ ÚÁÐÉÓØ ÚÁÍÏÒÏÖÅÎÁ");
-    return 0;
-    }
-
-if ((*user)->GetAuthorized() && (*user)->GetCurrIP() != sip)
-    {
-    printfd(__FILE__, "Login %s already in use. IP \'%s\'\n", (*user)->GetLogin().c_str(), inet_ntostring(sip).c_str());
-    WriteServLog("Login %s already in use. IP \'%s\'", (*user)->GetLogin().c_str(), inet_ntostring(sip).c_str());
-    SendError(sip, sport, protoVer, "÷ÁÛ ÌÏÇÉÎ ÕÖÅ ÉÓÐÏÌØÚÕÅÔÓÑ!");
-    return 0;
-    }
-
-USER_PTR u;
-if (users->FindByIPIdx(sip, &u) == 0 && u->GetLogin() != (*user)->GetLogin())
-    {
-    printfd(__FILE__, "IP address already in use. IP \'%s\'\n", inet_ntostring(sip).c_str());
-    WriteServLog("IP address already in use. IP \'%s\'", inet_ntostring(sip).c_str());
-    SendError(sip, sport, protoVer, "÷ÁÛ IP ÁÄÒÅÓ ÕÖÅ ÉÓÐÏÌØÚÕÅÔÓÑ!");
+    logger("User's connect failed. User: '%s', ip %s. Wrong login or password",
+           login.c_str(),
+           inet_ntostring(sip).c_str());
+    ip2user.erase(it);
     return 0;
     }
 
-// ôÅÐÅÒØ ÍÙ ÄÏÌÖÎÙ ÐÒÏ×ÅÒÉÔØ, ÍÏÖÅÔ ÌÉ ÐÏÌØÚÏ×ÁÔÅÌØ ÐÏÄËÌÀÞÉÔÓÑ Ó ÜÔÏÇÏ ÁÄÒÅÓÁ.
-int ipFound = (*user)->GetProperty().ips.Get().IsIPInIPS(sip);
-if (!ipFound)
+if (user->IsAuthorizedBy(this) && user->GetCurrIP() != sip)
     {
-    printfd(__FILE__, "User %s. IP address is incorrect. IP \'%s\'\n", (*user)->GetLogin().c_str(), inet_ntostring(sip).c_str());
-    WriteServLog("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.");
+    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' 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, IconvString("Логин уже используется.", "utf8", "koi8-ru"));
+    ip2user.erase(it);
     return 0;
     }
 
-int ret = -1;
-
-switch (pn)
+switch (pi->second)
     {
     case CONN_SYN_N:
         switch (protoVer)
             {
             case 6:
-                connSyn6 = (CONN_SYN_6*)(buff - offset);
-                ret = Process_CONN_SYN_6(connSyn6, &(it->second), sip);
-                break;
+                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:
-                connSyn7 = (CONN_SYN_7*)(buff - offset);
-                ret = Process_CONN_SYN_7(connSyn7, &(it->second), sip);
-                break;
+                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:
-                connSyn8 = (CONN_SYN_8*)(buff - offset);
-                ret = Process_CONN_SYN_8(connSyn8, &(it->second), sip);
-                break;
-            }
-
-        if (ret != 0)
-            {
-            return 0;
-            }
-        switch (protoVer)
-            {
-            case 6:
-                Send_CONN_SYN_ACK_6(iaUser, sip);
-                break;
-            case 7:
-                Send_CONN_SYN_ACK_7(iaUser, sip);
-                break;
-            case 8:
-                Send_CONN_SYN_ACK_8(iaUser, sip);
-                break;
+                if (Process_CONN_SYN_8(static_cast<CONN_SYN_8 *>(buff), &(it->second), sip))
+                    return -1;
+                return Send_CONN_SYN_ACK_8(iaUser, sip);
             }
         break;
 
     case CONN_ACK_N:
-        connAck = (CONN_ACK_6*)(buff - offset);
-        switch (protoVer)
-            {
-            case 6:
-                ret = Process_CONN_ACK_6(connAck, iaUser, sip);
-                break;
-            case 7:
-                ret = Process_CONN_ACK_7(connAck, iaUser, sip);
-                break;
-            case 8:
-                ret = Process_CONN_ACK_8((CONN_ACK_8*)(buff - offset), iaUser, sip);
-                break;
-            }
-
-        if (ret != 0)
-            {
-            SendError(sip, sport, protoVer, errorStr);
-            return 0;
-            }
-
         switch (protoVer)
             {
             case 6:
-                Send_ALIVE_SYN_6(iaUser, sip);
-                break;
+                if (Process_CONN_ACK_6(static_cast<CONN_ACK_6 *>(buff), iaUser, sip))
+                    return -1;
+                return Send_ALIVE_SYN_6(iaUser, sip);
             case 7:
-                Send_ALIVE_SYN_7(iaUser, sip);
-                break;
+                if (Process_CONN_ACK_7(static_cast<CONN_ACK_6 *>(buff), iaUser, sip))
+                    return -1;
+                return Send_ALIVE_SYN_7(iaUser, sip);
             case 8:
-                Send_ALIVE_SYN_8(iaUser, sip);
-                break;
+                if (Process_CONN_ACK_8(static_cast<CONN_ACK_8 *>(buff), iaUser, sip))
+                    return -1;
+                return Send_ALIVE_SYN_8(iaUser, sip);
             }
-
         break;
 
-        // ðÒÉÂÙÌ ÏÔ×ÅÔ Ó ÐÏÄÔ×ÅÒÖÄÅÎÉÅÍ ALIVE
     case ALIVE_ACK_N:
-        aliveAck = (ALIVE_ACK_6*)(buff - offset);
         switch (protoVer)
             {
             case 6:
-                ret = Process_ALIVE_ACK_6(aliveAck, iaUser, sip);
-                break;
+                return Process_ALIVE_ACK_6(static_cast<ALIVE_ACK_6 *>(buff), iaUser, sip);
             case 7:
-                ret = Process_ALIVE_ACK_7(aliveAck, iaUser, sip);
-                break;
+                return Process_ALIVE_ACK_7(static_cast<ALIVE_ACK_6 *>(buff), iaUser, sip);
             case 8:
-                ret = Process_ALIVE_ACK_8((ALIVE_ACK_8*)(buff - offset), iaUser, sip);
-                break;
+                return Process_ALIVE_ACK_8(static_cast<ALIVE_ACK_8 *>(buff), iaUser, sip);
             }
         break;
 
-        // úÁÐÒÏÓ ÎÁ ÏÔËÌÀÞÅÎÉÅ
     case DISCONN_SYN_N:
-
-        disconnSyn = (DISCONN_SYN_6*)(buff - offset);
-        switch (protoVer)
-            {
-            case 6:
-                ret = Process_DISCONN_SYN_6(disconnSyn, iaUser, sip);
-                break;
-            case 7:
-                ret = Process_DISCONN_SYN_7(disconnSyn, iaUser, sip);
-                break;
-            case 8:
-                ret = Process_DISCONN_SYN_8((DISCONN_SYN_8*)(buff - offset), iaUser, sip);
-                break;
-            }
-
-        if (ret != 0)
-            return 0;
-
         switch (protoVer)
             {
             case 6:
-                Send_DISCONN_SYN_ACK_6(iaUser, sip);
-                break;
+                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:
-                Send_DISCONN_SYN_ACK_7(iaUser, sip);
-                break;
+                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:
-                Send_DISCONN_SYN_ACK_8(iaUser, sip);
-                break;
+                if (Process_DISCONN_SYN_8(static_cast<DISCONN_SYN_8 *>(buff), iaUser, sip))
+                    return -1;
+                return Send_DISCONN_SYN_ACK_8(iaUser, sip);
             }
         break;
 
     case DISCONN_ACK_N:
-        disconnAck = (DISCONN_ACK_6*)(buff - offset);
-
-        switch (protoVer)
-            {
-            case 6:
-                ret = Process_DISCONN_ACK_6(disconnAck, iaUser, sip, it);
-                break;
-            case 7:
-                ret = Process_DISCONN_ACK_7(disconnAck, iaUser, sip, it);
-                break;
-            case 8:
-                ret = Process_DISCONN_ACK_8((DISCONN_ACK_8*)(buff - offset), iaUser, sip, it);
-                break;
-            }
-
         switch (protoVer)
             {
             case 6:
-                Send_FIN_6(iaUser, sip, it);
-                break;
+                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:
-                Send_FIN_7(iaUser, sip, it);
-                break;
+                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:
-                Send_FIN_8(iaUser, sip, it);
-                break;
+                if (Process_DISCONN_ACK_8(static_cast<DISCONN_ACK_8 *>(buff), iaUser, sip, it))
+                    return -1;
+                return Send_FIN_8(iaUser, sip, it);
             }
         break;
     }
 
-return 0;
+return -1;
 }
 //-----------------------------------------------------------------------------
 void AUTH_IA::DelUser(USER_PTR u)
 {
-STG_LOCKER lock(&mutex, __FILE__, __LINE__);
 
 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);
 it = ip2user.find(ip);
 if (it == ip2user.end())
     {
@@ -1033,17 +965,17 @@ if (it == ip2user.end())
 if (it->second.user == u)
     {
     printfd(__FILE__, "User removed!\n");
-    it->second.user->Unauthorize(this);
+    users->Unauthorize(u->GetLogin(), this);
     ip2user.erase(it);
     }
 }
 //-----------------------------------------------------------------------------
-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;
@@ -1051,8 +983,7 @@ switch (protoVer)
 
         sendAddr.sin_family = AF_INET;
         sendAddr.sin_port = htons(port);
-
-        sendAddr.sin_addr.s_addr = ip;// IP ÐÏÌØÚÏ×ÁÔÅÌÑ
+        sendAddr.sin_addr.s_addr = ip;
 
         err.len = 1;
         strncpy((char*)err.type, "ERR", 16);
@@ -1072,8 +1003,7 @@ switch (protoVer)
 
         sendAddr.sin_family = AF_INET;
         sendAddr.sin_port = htons(port);
-
-        sendAddr.sin_addr.s_addr = ip;// IP ÐÏÌØÚÏ×ÁÔÅÌÑ
+        sendAddr.sin_addr.s_addr = ip;
 
         err8.len = 256;
         strncpy((char*)err8.type, "ERR", 16);
@@ -1091,30 +1021,27 @@ 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 char * buffer, size_t len)
 {
 struct sockaddr_in sendAddr;
-int res;
 
 sendAddr.sin_family = AF_INET;
 sendAddr.sin_port = htons(port);
 sendAddr.sin_addr.s_addr = ip;
 
-res = sendto(listenSocket, buffer, len, 0, (struct sockaddr*)&sendAddr, sizeof(sendAddr));
-
-static struct timeval tv;
-gettimeofday(&tv, NULL);
+if (sendto(listenSocket, buffer, len, 0, (struct sockaddr*)&sendAddr, sizeof(sendAddr)) == static_cast<ssize_t>(len))
+    return 0;
 
-return res;
+return -1;
 }
 //-----------------------------------------------------------------------------
 int AUTH_IA::SendMessage(const STG_MSG & msg, uint32_t ip) const
 {
-STG_LOCKER lock(&mutex, __FILE__, __LINE__);
-
 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);
 it = ip2user.find(ip);
 if (it == ip2user.end())
     {
@@ -1127,11 +1054,9 @@ return 0;
 //-----------------------------------------------------------------------------
 int AUTH_IA::RealSendMessage6(const STG_MSG & msg, uint32_t ip, IA_USER & user)
 {
-printfd(__FILE__, "RealSendMessage 6 user=%s\n", user.user->GetLogin().c_str());
+printfd(__FILE__, "RealSendMessage 6 user=%s\n", user.login.c_str());
 
-char buffer[256];
 INFO_6 info;
-
 memset(&info, 0, sizeof(INFO_6));
 
 info.len = 256;
@@ -1145,27 +1070,23 @@ size_t len = info.len;
 SwapBytes(info.len);
 #endif
 
+char buffer[256];
 memcpy(buffer, &info, sizeof(INFO_6));
-Encrypt(&user.ctx, buffer, buffer, len / 8);
-Send(ip, iaSettings.GetUserPort(), buffer, len);
-
-return 0;
+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)
 {
-printfd(__FILE__, "RealSendMessage 7 user=%s\n", user.user->GetLogin().c_str());
+printfd(__FILE__, "RealSendMessage 7 user=%s\n", user.login.c_str());
 
-char buffer[300];
 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;
-
+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;
@@ -1177,29 +1098,24 @@ SwapBytes(info.sendTime);
 strncpy((char*)info.text, msg.text.c_str(), 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);
-Send(ip, iaSettings.GetUserPort(), buffer, len);
-
-return 0;
+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)
 {
-printfd(__FILE__, "RealSendMessage 8 user=%s\n", user.user->GetLogin().c_str());
-
-char buffer[1500];
-memset(buffer, 0, sizeof(buffer));
+printfd(__FILE__, "RealSendMessage 8 user=%s\n", user.login.c_str());
 
 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;
+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);
@@ -1211,12 +1127,11 @@ SwapBytes(info.len);
 SwapBytes(info.sendTime);
 #endif
 
+char buffer[1500];
 memcpy(buffer, &info, sizeof(INFO_8));
 
-Encrypt(&user.ctx, buffer, buffer, len / 8);
-Send(ip, user.port, buffer, len);
-
-return 0;
+EncryptString(buffer, buffer, len, &user.ctx);
+return Send(ip, user.port, buffer, len);
 }
 //-----------------------------------------------------------------------------
 int AUTH_IA::Process_CONN_SYN_6(CONN_SYN_6 *, IA_USER * iaUser, uint32_t)
@@ -1241,7 +1156,7 @@ 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;
 }
@@ -1253,13 +1168,13 @@ SwapBytes(connAck->len);
 SwapBytes(connAck->rnd);
 #endif
 printfd( __FILE__, "CONN_ACK_6 %s\n", connAck->type);
-// ÕÓÔÁÎÏ×ÉÔØ ÎÏ×ÕÀ ÆÁÚÕ É ×ÒÅÍÑ É ÒÁÚÒÅÛÉÔØ ÉÎÅÔ
+
 if ((iaUser->phase.GetPhase() == 2) && (connAck->rnd == iaUser->rnd + 1))
     {
     iaUser->phase.UpdateTime();
 
     iaUser->lastSendAlive = iaUser->phase.GetTime();
-    if (iaUser->user->Authorize(sip, enabledDirs, this) == 0)
+    if (users->Authorize(iaUser->login, sip, enabledDirs, this))
         {
         iaUser->phase.SetPhase3();
         printfd(__FILE__, "Phase changed from 2 to 3. Reason: CONN_ACK_6\n");
@@ -1268,12 +1183,22 @@ 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);
+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;
 }
 //-----------------------------------------------------------------------------
@@ -1294,7 +1219,7 @@ if ((iaUser->phase.GetPhase() == 2) && (connAck->rnd == iaUser->rnd + 1))
     {
     iaUser->phase.UpdateTime();
     iaUser->lastSendAlive = iaUser->phase.GetTime();
-    if (iaUser->user->Authorize(sip, enabledDirs, this) == 0)
+    if (users->Authorize(iaUser->login, sip, enabledDirs, this))
         {
         iaUser->phase.SetPhase3();
         printfd(__FILE__, "Phase changed from 2 to 3. Reason: CONN_ACK_8\n");
@@ -1303,12 +1228,22 @@ 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);
+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;
 }
 //-----------------------------------------------------------------------------
@@ -1351,11 +1286,13 @@ 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;
@@ -1372,10 +1309,12 @@ 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;
@@ -1389,8 +1328,8 @@ 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);
@@ -1399,6 +1338,13 @@ 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;
     }
@@ -1406,12 +1352,12 @@ 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);
@@ -1420,6 +1366,13 @@ 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;
     }
@@ -1443,7 +1396,7 @@ for (int j = 0; j < DIR_NUM; j++)
     }
 //--- Fill static data in connSynAck ---
 
-iaUser->rnd = random();
+iaUser->rnd = static_cast<uint32_t>(random());
 connSynAck6.rnd = iaUser->rnd;
 
 connSynAck6.userTimeOut = iaSettings.GetUserTimeout();
@@ -1456,7 +1409,7 @@ SwapBytes(connSynAck6.userTimeOut);
 SwapBytes(connSynAck6.aliveDelay);
 #endif
 
-Encrypt(&iaUser->ctx, (char*)&connSynAck6, (char*)&connSynAck6, Min8(sizeof(CONN_SYN_ACK_6))/8);
+EncryptString((char*)&connSynAck6, (char*)&connSynAck6, Min8(sizeof(CONN_SYN_ACK_6)), &iaUser->ctx);
 return Send(sip, iaSettings.GetUserPort(), (char*)&connSynAck6, Min8(sizeof(CONN_SYN_ACK_6)));;
 }
 //-----------------------------------------------------------------------------
@@ -1485,7 +1438,7 @@ for (int j = 0; j < DIR_NUM; j++)
     }
 //--- Fill static data in connSynAck ---
 
-iaUser->rnd = random();
+iaUser->rnd = static_cast<uint32_t>(random());
 connSynAck8.rnd = iaUser->rnd;
 
 connSynAck8.userTimeOut = iaSettings.GetUserTimeout();
@@ -1498,15 +1451,14 @@ SwapBytes(connSynAck8.userTimeOut);
 SwapBytes(connSynAck8.aliveDelay);
 #endif
 
-Encrypt(&iaUser->ctx, (char*)&connSynAck8, (char*)&connSynAck8, Min8(sizeof(CONN_SYN_ACK_8))/8);
+EncryptString((char*)&connSynAck8, (char*)&connSynAck8, Min8(sizeof(CONN_SYN_ACK_8)), &iaUser->ctx);
 return Send(sip, iaUser->port, (char*)&connSynAck8, Min8(sizeof(CONN_SYN_ACK_8)));
-//return Send(sip, iaUser->port, (char*)&connSynAck8, 384);
 }
 //-----------------------------------------------------------------------------
 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");
 
@@ -1529,8 +1481,8 @@ 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, "---");
         }
@@ -1558,7 +1510,7 @@ else
 #ifdef IA_DEBUG
 if (iaUser->aliveSent)
     {
-    printfd(__FILE__, "========= ALIVE_ACK_6(7) TIMEOUT !!! %s =========\n", iaUser->user->GetLogin().c_str());
+    printfd(__FILE__, "========= ALIVE_ACK_6(7) TIMEOUT !!! %s =========\n", iaUser->login.c_str());
     }
 iaUser->aliveSent = true;
 #endif
@@ -1580,7 +1532,7 @@ for (int i = 0; i < DIR_NUM; ++i)
     }
 #endif
 
-Encrypt(&(iaUser->ctx), (char*)&aliveSyn6, (char*)&aliveSyn6, Min8(sizeof(aliveSyn6))/8);
+EncryptString((char*)&aliveSyn6, (char*)&aliveSyn6, Min8(sizeof(aliveSyn6)), &iaUser->ctx);
 return Send(sip, iaSettings.GetUserPort(), (char*)&aliveSyn6, Min8(sizeof(aliveSyn6)));
 }
 //-----------------------------------------------------------------------------
@@ -1596,7 +1548,7 @@ 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");
 
@@ -1619,8 +1571,8 @@ if (dn < DIR_NUM)
                                          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, "---");
         }
@@ -1673,7 +1625,7 @@ for (int i = 0; i < DIR_NUM; ++i)
     }
 #endif
 
-Encrypt(&(iaUser->ctx), (char*)&aliveSyn8, (char*)&aliveSyn8, Min8(sizeof(aliveSyn8))/8);
+EncryptString((char*)&aliveSyn8, (char*)&aliveSyn8, Min8(sizeof(aliveSyn8)), &iaUser->ctx);
 return Send(sip, iaUser->port, (char*)&aliveSyn8, Min8(sizeof(aliveSyn8)));
 }
 //-----------------------------------------------------------------------------
@@ -1681,14 +1633,14 @@ 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();
+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);
+EncryptString((char*)&disconnSynAck6, (char*)&disconnSynAck6, Min8(sizeof(disconnSynAck6)), &iaUser->ctx);
 return Send(sip, iaSettings.GetUserPort(), (char*)&disconnSynAck6, Min8(sizeof(disconnSynAck6)));
 }
 //-----------------------------------------------------------------------------
@@ -1705,18 +1657,18 @@ 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();
+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);
+EncryptString((char*)&disconnSynAck8, (char*)&disconnSynAck8, Min8(sizeof(disconnSynAck8)), &iaUser->ctx);
 return Send(sip, iaUser->port, (char*)&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");
@@ -1726,21 +1678,23 @@ strcpy((char*)fin6.ok, "OK");
 SwapBytes(fin6.len);
 #endif
 
-Encrypt(&iaUser->ctx, (char*)&fin6, (char*)&fin6, Min8(sizeof(fin6))/8);
+EncryptString((char*)&fin6, (char*)&fin6, Min8(sizeof(fin6)), &iaUser->ctx);
+
+users->Unauthorize(iaUser->login, this);
 
-iaUser->user->Unauthorize(this);
+int res = Send(sip, iaSettings.GetUserPort(), (char*)&fin6, Min8(sizeof(fin6)));
 
-int ret = Send(sip, iaSettings.GetUserPort(), (char*)&fin6, Min8(sizeof(fin6)));
 ip2user.erase(it);
-return ret;
+
+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);
 fin8.hdr.protoVer[0] = 0;
@@ -1754,38 +1708,26 @@ strcpy((char*)fin8.ok, "OK");
 SwapBytes(fin8.len);
 #endif
 
-Encrypt(&iaUser->ctx, (char*)&fin8, (char*)&fin8, Min8(sizeof(fin8))/8);
+EncryptString((char*)&fin8, (char*)&fin8, Min8(sizeof(fin8)), &iaUser->ctx);
+
+users->Unauthorize(iaUser->login, this);
 
-iaUser->user->Unauthorize(this);
+int res = Send(sip, iaUser->port, (char*)&fin8, Min8(sizeof(fin8)));
 
-int ret = Send(sip, iaUser->port, (char*)&fin8, Min8(sizeof(fin8)));
 ip2user.erase(it);
-return ret;
+
+return res;
 }
+namespace
+{
 //-----------------------------------------------------------------------------
 inline
-void InitEncrypt(BLOWFISH_CTX * ctx, const string & password)
+void InitEncrypt(BLOWFISH_CTX * ctx, const std::string & password)
 {
-unsigned char keyL[PASSWD_LEN];  // ðÁÒÏÌØ ÄÌÑ ÛÉÆÒÏ×ËÉ
+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)
-{
-// len8 - ÄÌÉÎÁ × 8-ÍÉ ÂÁÊÔÏ×ÙÈ ÂÌÏËÁÈ
-
-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)
-{
-// len8 - ÄÌÉÎÁ × 8-ÍÉ ÂÁÊÔÏ×ÙÈ ÂÌÏËÁÈ
-
-for (int i = 0; i < len8; i++)
-    EncodeString(dst + i * 8, src + i * 8, ctx);
 }