src/userprocess.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $Core: libIRCDuserprocess */
  15
  16 #include "inspircd.h"
  17 #include "wildcard.h"
  18 #include "xline.h"
  19 #include "socketengine.h"
  20 #include "command_parse.h"
  21
  22 void FloodQuitUserHandler::Call(User* current)
  23 {
  24         Server->Log(DEFAULT,"Excess flood from: %s@%s", current->ident, current->host);
  25         Server->SNO->WriteToSnoMask('f',"Excess flood from: %s%s%s@%s",
  26                         current->registered == REG_ALL ? current->nick : "",
  27                         current->registered == REG_ALL ? "!" : "", current->ident, current->host);
  28         User::QuitUser(Server, current, "Excess flood");
  29
  30         if (current->registered != REG_ALL)
  31         {
  32                 ZLine* zl = new ZLine(Server, Server->Time(), 0, Server->Config->ServerName, "Flood from unregistered connection", current->GetIPString());
  33                 if (Server->XLines->AddLine(zl,NULL))
  34                         Server->XLines->ApplyLines();
  35                 else
  36                         delete zl;
  37         }
  38 }
  39
  40 void ProcessUserHandler::Call(User* cu)
  41 {
  42         int result = EAGAIN;
  43
  44         if (cu->GetFd() == FD_MAGIC_NUMBER)
  45                 return;
  46
  47         char* ReadBuffer = Server->GetReadBuffer();
  48
  49         if (Server->Config->GetIOHook(cu->GetPort()))
  50         {
  51                 int result2 = 0;
  52                 int MOD_RESULT = 0;
  53
  54                 try
  55                 {
  56                         MOD_RESULT = Server->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->GetFd(),ReadBuffer,Server->Config->NetBufferSize,result2);
  57                 }
  58                 catch (CoreException& modexcept)
  59                 {
  60                         Server->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  61                 }
  62
  63                 if (MOD_RESULT < 0)
  64                 {
  65                         result = -EAGAIN;
  66                 }
  67                 else
  68                 {
  69                         result = result2;
  70                 }
  71         }
  72         else
  73         {
  74                 result = cu->ReadData(ReadBuffer, sizeof(ReadBuffer));
  75         }
  76
  77         if ((result) && (result != -EAGAIN))
  78         {
  79                 User *current;
  80                 int currfd;
  81
  82                 Server->stats->statsRecv += result;
  83                 /*
  84                  * perform a check on the raw buffer as an array (not a string!) to remove
  85                  * character 0 which is illegal in the RFC - replace them with spaces.
  86                  */
  87
  88                 for (int checker = 0; checker < result; checker++)
  89                 {
  90                         if (ReadBuffer[checker] == 0)
  91                                 ReadBuffer[checker] = ' ';
  92                 }
  93
  94                 if (result > 0)
  95                         ReadBuffer[result] = '\0';
  96
  97                 current = cu;
  98                 currfd = current->GetFd();
  99
 100                 // add the data to the users buffer
 101                 if (result > 0)
 102                 {
 103                         if (!current->AddBuffer(ReadBuffer))
 104                         {
 105                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 106                                 if (current->registered == REG_ALL)
 107                                 {
 108                                         if (current->MyClass)
 109                                         {
 110                                                 // Make sure they arn't flooding long lines.
 111                                                 if (Server->Time() > current->reset_due)
 112                                                 {
 113                                                         current->reset_due = Server->Time() + current->MyClass->GetThreshold();
 114                                                         current->lines_in = 0;
 115                                                 }
 116
 117                                                 current->lines_in++;
 118
 119                                                 if (current->MyClass->GetFlood() && current->lines_in > current->MyClass->GetFlood())
 120                                                         Server->FloodQuitUser(current);
 121                                                 else
 122                                                 {
 123                                                         current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over %d chars) Please shorten it.", current->nick, MAXBUF-2);
 124                                                         current->recvq.clear();
 125                                                 }
 126                                         }
 127                                 }
 128                                 else
 129                                         Server->FloodQuitUser(current);
 130
 131                                 return;
 132                         }
 133
 134                         /* If user is over penalty, dont process here, just build up */
 135                         if (!current->OverPenalty)
 136                                 Server->Parser->DoLines(current);
 137
 138                         return;
 139                 }
 140
 141                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 142                 {
 143                         User::QuitUser(Server, cu, errno ? strerror(errno) : "EOF from client");
 144                         return;
 145                 }
 146         }
 147
 148         // result EAGAIN means nothing read
 149         else if ((result == EAGAIN) || (result == -EAGAIN))
 150         {
 151                 /* do nothing */
 152         }
 153         else if (result == 0)
 154         {
 155                 User::QuitUser(Server, cu, "Connection closed");
 156                 return;
 157         }
 158 }
 159
 160 /**
 161  * This function is called once a second from the mainloop.
 162  * It is intended to do background checking on all the user structs, e.g.
 163  * stuff like ping checks, registration timeouts, etc.
 164  */
 165 void InspIRCd::DoBackgroundUserStuff()
 166 {
 167         /*
 168          * loop over all local users..
 169          */
 170         for (std::vector<User*>::iterator count2 = this->Users->local_users.begin(); count2 != this->Users->local_users.end(); count2++)
 171         {
 172                 User *curr = *count2;
 173
 174                 if (curr->Penalty)
 175                 {
 176                         curr->Penalty--;
 177                         if (curr->Penalty < 10)
 178                                 Parser->DoLines(curr, true);
 179                 }
 180
 181                 if (curr->OverPenalty)
 182                 {
 183                         if (curr->sendq.empty())
 184                                 curr->OverPenalty = false;
 185                 }
 186
 187                 if ((curr->registered != REG_ALL) && (TIME > curr->timeout))
 188                 {
 189                         /*
 190                          * registration timeout -- didnt send USER/NICK/HOST
 191                          * in the time specified in their connection class.
 192                          */
 193                         User::QuitUser(this, curr, "Registration timeout");
 194                         continue;
 195                 }
 196
 197                 /*
 198                  * `ready` means that the user has provided NICK/USER(/PASS), and all modules agree
 199                  * that the user is okay to proceed. The one thing we are then waiting for now is DNS...
 200                  */
 201                 bool ready = ((curr->registered == REG_NICKUSER) && AllModulesReportReady(curr));
 202
 203                 if (ready)
 204                 {
 205                         if (curr->dns_done)
 206                         {
 207                                 /* DNS passed, connect the user */
 208                                 curr->FullConnect();
 209                                 continue;
 210                         }
 211                 }
 212
 213                 // It's time to PING this user. Send them a ping.
 214                 if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 215                 {
 216                         // This user didn't answer the last ping, remove them
 217                         if (!curr->lastping)
 218                         {
 219                                 time_t time = this->Time(false) - (curr->nping - curr->MyClass->GetPingTime());
 220                                 char message[MAXBUF];
 221                                 snprintf(message, MAXBUF, "Ping timeout: %ld second%s", (long)time, time > 1 ? "s" : "");
 222                                 curr->lastping = 1;
 223                                 curr->nping = TIME + curr->MyClass->GetPingTime();
 224                                 User::QuitUser(this, curr, message);
 225                                 continue;
 226                         }
 227                         curr->Write("PING :%s",this->Config->ServerName);
 228                         curr->lastping = 0;
 229                         curr->nping = TIME  +curr->MyClass->GetPingTime();
 230                 }
 231         }
 232 }
 233