X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/597f6f31e3801612273886481381df509d8bcd12..b3139bf3f37b3b0244efea8b4b5e5a7d0bc90095:/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 1eac0ab1..5a15a10a 100644
--- a/projects/stargazer/plugins/authorization/inetaccess/inetaccess.cpp
+++ b/projects/stargazer/plugins/authorization/inetaccess/inetaccess.cpp
@@ -36,6 +36,7 @@
 #include <cstdlib>
 #include <cstdio> // snprintf
 #include <cerrno>
+#include <cmath>
 #include <algorithm>
 
 #include "stg/common.h"
@@ -46,16 +47,21 @@
 #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);
+void Decrypt(BLOWFISH_CTX * ctx, void * dst, const void * src, size_t len8);
+void Encrypt(BLOWFISH_CTX * ctx, void * dst, const void * src, size_t len8);
+}
+
+extern "C" PLUGIN * GetPlugin();
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
@@ -79,7 +85,7 @@ 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);
@@ -95,7 +101,7 @@ 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);
@@ -128,8 +134,19 @@ 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);
@@ -321,9 +338,9 @@ AUTH_IA::AUTH_IA()
       fin6(),
       fin8(),
       packetTypes(),
-      WriteServLog(GetStgLogger()),
       enabledDirs(0xFFffFFff),
-      onDelUserNotifier(*this)
+      onDelUserNotifier(*this),
+      logger(GetPluginLogger(GetStgLogger(), "auth_ia"))
 {
 InitEncrypt(&ctxS, "pr7Hhen");
 
@@ -393,6 +410,7 @@ if (!isRunningRun)
         {
         errorStr = "Cannot create thread.";
         printfd(__FILE__, "Cannot create recv thread\n");
+        logger("Cannot create recv thread.");
         return -1;
         }
     }
@@ -403,6 +421,7 @@ if (!isRunningRunTimeouter)
         {
         errorStr = "Cannot create thread.";
         printfd(__FILE__, "Cannot create timeouter thread\n");
+        logger("Cannot create timeouter thread.");
         return -1;
         }
     }
@@ -431,31 +450,6 @@ if (isRunningRun)
         struct timespec ts = {0, 200000000};
         nanosleep(&ts, NULL);
         }
-
-    //after 5 seconds waiting thread still running. now killing it
-    if (isRunningRun)
-        {
-        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)
-            {
-            struct timespec ts = {0, 200000000};
-            nanosleep(&ts, NULL);
-            }
-        if (isRunningRun)
-            {
-            printfd(__FILE__, "Failed to stop recv thread\n");
-            }
-        else
-            {
-            pthread_join(recvThread, NULL);
-            }
-        printfd(__FILE__, "AUTH_IA killed Run\n");
-        }
     }
 
 FinalizeNet();
@@ -468,33 +462,14 @@ if (isRunningRunTimeouter)
         struct timespec ts = {0, 200000000};
         nanosleep(&ts, NULL);
         }
-
-    //after 5 seconds waiting thread still running. now killing it
-    if (isRunningRunTimeouter)
-        {
-        if (pthread_kill(timeouterThread, SIGINT))
-            {
-            errorStr = "Cannot kill thread.";
-            return -1;
-            }
-        for (int i = 0; i < 25 && isRunningRunTimeouter; ++i)
-            {
-            struct timespec ts = {0, 200000000};
-            nanosleep(&ts, NULL);
-            }
-        if (isRunningRunTimeouter)
-            {
-            printfd(__FILE__, "Failed to stop timeouter thread\n");
-            }
-        else
-            {
-            pthread_join(timeouterThread, NULL);
-            }
-        printfd(__FILE__, "AUTH_IA killed Timeouter\n");
-        }
     }
-printfd(__FILE__, "AUTH_IA::Stoped successfully.\n");
+
 users->DelNotifierUserDel(&onDelUserNotifier);
+
+if (isRunningRun || isRunningRunTimeouter)
+    return -1;
+
+printfd(__FILE__, "AUTH_IA::Stoped successfully.\n");
 return 0;
 }
 //-----------------------------------------------------------------------------
@@ -518,7 +493,7 @@ 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());
         }
     }
@@ -538,7 +513,7 @@ 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)
     {
     struct timespec ts = {0, 20000000};
@@ -572,16 +547,18 @@ 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;
     }
 
@@ -603,7 +580,7 @@ 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
     {
@@ -615,6 +592,7 @@ 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;
@@ -623,8 +601,11 @@ 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 ?
@@ -632,15 +613,12 @@ memset(login, 0, PASSWD_LEN);
 
 Decrypt(&ctxS, login, buffer + 8, PASSWD_LEN / 8);
 
-uint32_t sip = outerAddr.sin_addr.s_addr;
-uint16_t sport = htons(outerAddr.sin_port);
-
 USER_PTR user;
 if (users->FindByName(login, &user))
     {
-    WriteServLog("User's connect failed: user '%s' not found. IP %s",
-                 login,
-                 inet_ntostring(sip).c_str());
+    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!");
     return -1;
@@ -650,12 +628,14 @@ printfd(__FILE__, "User '%s' FOUND!\n", user->GetLogin().c_str());
 
 if (user->GetProperty().disabled.Get())
     {
+    logger("Cannont authorize '%s', user is disabled.", login);
     SendError(sip, sport, protoVer, "õÞÅÔÎÁÑ ÚÁÐÉÓØ ÚÁÂÌÏËÉÒÏ×ÁÎÁ");
     return 0;
     }
 
 if (user->GetProperty().passive.Get())
     {
+    logger("Cannont authorize '%s', user is passive.", login);
     SendError(sip, sport, protoVer, "õÞÅÔÎÁÑ ÚÁÐÉÓØ ÚÁÍÏÒÏÖÅÎÁ");
     return 0;
     }
@@ -664,8 +644,8 @@ 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());
-    WriteServLog("User %s. IP address is incorrect. IP %s",
-                 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.");
     return 0;
     }
@@ -673,12 +653,14 @@ if (!user->GetProperty().ips.Get().IsIPInIPS(sip))
 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");
+    if (iaSettings.LogProtocolErrors())
+        logger("IP: %s. Header: invalid packed signature.", inet_ntostring(sip).c_str());
     //SendError(userIP, "Incorrect header!");
     return -1;
     }
@@ -686,6 +668,8 @@ if (strncmp(IA_ID, buffer, strlen(IA_ID)) != 0)
 if (buffer[6] != 0) //proto[0] shoud be 0
     {
     printfd(__FILE__, "update needed - PROTO major: %d\n", buffer[6]);
+    if (iaSettings.LogProtocolErrors())
+        logger("IP: %s. Header: invalid protocol major version: %d.", inet_ntostring(sip).c_str(), buffer[6]);
     //SendError(userIP, updateMsg);
     return -1;
     }
@@ -695,6 +679,8 @@ 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
@@ -708,7 +694,7 @@ int AUTH_IA::Timeouter()
 {
 STG_LOCKER lock(&mutex, __FILE__, __LINE__);
 
-map<uint32_t, IA_USER>::iterator it;
+std::map<uint32_t, IA_USER>::iterator it;
 it = ip2user.begin();
 uint32_t sip;
 
@@ -722,6 +708,8 @@ 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());
         it->second.phase.SetPhase1();
         printfd(__FILE__, "Phase changed from 2 to 1. Reason: timeout\n");
         ip2user.erase(it++);
@@ -764,6 +752,8 @@ 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());
             users->Unauthorize(it->second.user->GetLogin(), this);
             ip2user.erase(it++);
             continue;
@@ -773,6 +763,8 @@ 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");
         }
@@ -783,13 +775,13 @@ 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)
 {
 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::map<uint32_t, IA_USER>::iterator it(ip2user.find(sip));
 
 if (it == ip2user.end())
     {
@@ -802,10 +794,10 @@ if (it == ip2user.end())
                     userPtr->GetLogin().c_str(),
                     inet_ntostring(sip).c_str(),
                    login.c_str());
-            WriteServLog("IP address already in use by user '%s'. IP %s, login: '%s'",
-                         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, "÷ÁÛ IP ÁÄÒÅÓ ÕÖÅ ÉÓÐÏÌØÚÕÅÔÓÑ!");
             return 0;
             }
@@ -827,10 +819,10 @@ else if (user->GetID() != it->second.user->GetID())
             it->second.user->GetLogin().c_str(),
             inet_ntostring(sip).c_str(),
             user->GetLogin().c_str());
-    WriteServLog("IP address 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());
+    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!");
     return 0;
     }
@@ -843,21 +835,20 @@ if (iaUser->password != user->GetProperty().password.Get())
     iaUser->password = user->GetProperty().password.Get();
     }
 
-buff += offset;
-Decrypt(&iaUser->ctx, buff, buff, (dataLen - offset) / 8);
+Decrypt(&iaUser->ctx, static_cast<char *>(buff) + offset, static_cast<char *>(buff) + offset, (dataLen - offset) / 8);
 
 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!");
     printfd(__FILE__, "Login or password is wrong!\n");
-    WriteServLog("User's connect failed. User: '%s', ip %s. Wrong login or password",
-                 login.c_str(),
-                 inet_ntostring(sip).c_str());
+    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;
     }
@@ -867,10 +858,10 @@ 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());
-    WriteServLog("Login %s already in use from ip %s. IP %s",
-                 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, "÷ÁÛ ÌÏÇÉÎ ÕÖÅ ÉÓÐÏÌØÚÕÅÔÓÑ!");
     ip2user.erase(it);
     return 0;
@@ -882,15 +873,15 @@ 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);
             }
@@ -900,15 +891,15 @@ 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);
             }
@@ -918,11 +909,11 @@ 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;
 
@@ -930,15 +921,15 @@ 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);
             }
@@ -948,15 +939,15 @@ 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);
             }
@@ -974,7 +965,7 @@ 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__);
 it = ip2user.find(ip);
@@ -993,12 +984,12 @@ 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;
@@ -1044,7 +1035,7 @@ 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 char * buffer, size_t len)
 {
 struct sockaddr_in sendAddr;
 
@@ -1052,9 +1043,7 @@ 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, (struct sockaddr*)&sendAddr, sizeof(sendAddr)) == static_cast<ssize_t>(len))
     return 0;
 
 return -1;
@@ -1064,7 +1053,7 @@ int AUTH_IA::SendMessage(const STG_MSG & 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__);
 it = ip2user.find(ip);
@@ -1110,8 +1099,8 @@ 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;
@@ -1139,8 +1128,8 @@ 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);
@@ -1208,6 +1197,8 @@ 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");
@@ -1215,6 +1206,13 @@ if ((iaUser->phase.GetPhase() == 2) && (connAck->rnd == iaUser->rnd + 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;
 }
 //-----------------------------------------------------------------------------
@@ -1244,6 +1242,8 @@ 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");
@@ -1251,6 +1251,13 @@ if ((iaUser->phase.GetPhase() == 2) && (connAck->rnd == iaUser->rnd + 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;
 }
 //-----------------------------------------------------------------------------
@@ -1293,11 +1300,13 @@ 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;
@@ -1314,10 +1323,12 @@ 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;
@@ -1331,8 +1342,8 @@ 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);
@@ -1341,6 +1352,13 @@ 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;
     }
@@ -1348,12 +1366,12 @@ 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);
@@ -1362,6 +1380,13 @@ 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;
     }
@@ -1385,7 +1410,7 @@ 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();
@@ -1427,7 +1452,7 @@ 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();
@@ -1447,7 +1472,7 @@ return Send(sip, iaUser->port, (char*)&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");
 
@@ -1470,8 +1495,8 @@ 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, "---");
         }
@@ -1537,7 +1562,7 @@ 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");
 
@@ -1560,8 +1585,8 @@ 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, "---");
         }
@@ -1622,7 +1647,7 @@ 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);
@@ -1646,7 +1671,7 @@ 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);
@@ -1657,7 +1682,7 @@ Encrypt(&iaUser->ctx, (char*)&disconnSynAck8, (char*)&disconnSynAck8, Min8(sizeo
 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");
@@ -1678,12 +1703,12 @@ 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);
 fin8.hdr.protoVer[0] = 0;
@@ -1707,9 +1732,11 @@ ip2user.erase(it);
 
 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];
 memset(keyL, 0, PASSWD_LEN);
@@ -1718,15 +1745,17 @@ Blowfish_Init(ctx, keyL, PASSWD_LEN);
 }
 //-----------------------------------------------------------------------------
 inline
-void Decrypt(BLOWFISH_CTX * ctx, char * dst, const char * src, int len8)
+void Decrypt(BLOWFISH_CTX * ctx, void * dst, const void * src, size_t len8)
 {
-for (int i = 0; i < len8; i++)
-    DecodeString(dst + i * 8, src + i * 8, ctx);
+for (size_t i = 0; i < len8; i++)
+    DecodeString(static_cast<char *>(dst) + i * 8, static_cast<const char *>(src) + i * 8, ctx);
 }
 //-----------------------------------------------------------------------------
 inline
-void Encrypt(BLOWFISH_CTX * ctx, char * dst, const char * src, int len8)
+void Encrypt(BLOWFISH_CTX * ctx, void * dst, const void * src, size_t len8)
 {
-for (int i = 0; i < len8; i++)
-    EncodeString(dst + i * 8, src + i * 8, ctx);
+for (size_t i = 0; i < len8; i++)
+    EncodeString(static_cast<char *>(dst) + i * 8, static_cast<const char *>(src) + i * 8, ctx);
+}
+//-----------------------------------------------------------------------------
 }