src/userprocess.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 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                 Server->XLines->AddZLine(120, Server->Config->ServerName, "Flood from unregistered connection", current->GetIPString());
  33                 Server->XLines->ApplyLines();
  34         }
  35 }
  36
  37 void ProcessUserHandler::Call(User* cu)
  38 {
  39         int result = EAGAIN;
  40
  41         if (cu->GetFd() == FD_MAGIC_NUMBER)
  42                 return;
  43
  44         char* ReadBuffer = Server->GetReadBuffer();
  45
  46         if (Server->Config->GetIOHook(cu->GetPort()))
  47         {
  48                 int result2 = 0;
  49                 int MOD_RESULT = 0;
  50
  51                 try
  52                 {
  53                         MOD_RESULT = Server->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->GetFd(),ReadBuffer,Server->Config->NetBufferSize,result2);
  54                 }
  55                 catch (CoreException& modexcept)
  56                 {
  57                         Server->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  58                 }
  59
  60                 if (MOD_RESULT < 0)
  61                 {
  62                         result = -EAGAIN;
  63                 }
  64                 else
  65                 {
  66                         result = result2;
  67                 }
  68         }
  69         else
  70         {
  71                 result = cu->ReadData(ReadBuffer, sizeof(ReadBuffer));
  72         }
  73
  74         if ((result) && (result != -EAGAIN))
  75         {
  76                 User *current;
  77                 int currfd;
  78
  79                 Server->stats->statsRecv += result;
  80                 /*
  81                  * perform a check on the raw buffer as an array (not a string!) to remove
  82                  * character 0 which is illegal in the RFC - replace them with spaces.
  83                  */
  84
  85                 for (int checker = 0; checker < result; checker++)
  86                 {
  87                         if (ReadBuffer[checker] == 0)
  88                                 ReadBuffer[checker] = ' ';
  89                 }
  90
  91                 if (result > 0)
  92                         ReadBuffer[result] = '\0';
  93
  94                 current = cu;
  95                 currfd = current->GetFd();
  96
  97                 // add the data to the users buffer
  98                 if (result > 0)
  99                 {
 100                         if (!current->AddBuffer(ReadBuffer))
 101                         {
 102                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 103                                 if (current->registered == REG_ALL)
 104                                 {
 105                                         if (current->MyClass)
 106                                         {
 107                                                 // Make sure they arn't flooding long lines.
 108                                                 if (Server->Time() > current->reset_due)
 109                                                 {
 110                                                         current->reset_due = Server->Time() + current->MyClass->GetThreshold();
 111                                                         current->lines_in = 0;
 112                                                 }
 113
 114                                                 current->lines_in++;
 115
 116                                                 if (current->MyClass->GetFlood() && current->lines_in > current->MyClass->GetFlood())
 117                                                         Server->FloodQuitUser(current);
 118                                                 else
 119                                                 {
 120                                                         current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over %d chars) Please shorten it.", current->nick, MAXBUF-2);
 121                                                         current->recvq.clear();
 122                                                 }
 123                                         }
 124                                 }
 125                                 else
 126                                         Server->FloodQuitUser(current);
 127
 128                                 return;
 129                         }
 130
 131                         /* If user is over penalty, dont process here, just build up */
 132                         if (!current->OverPenalty)
 133                                 Server->Parser->DoLines(current);
 134
 135                         return;
 136                 }
 137
 138                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 139                 {
 140                         User::QuitUser(Server, cu, errno ? strerror(errno) : "EOF from client");
 141                         return;
 142                 }
 143         }
 144
 145         // result EAGAIN means nothing read
 146         else if ((result == EAGAIN) || (result == -EAGAIN))
 147         {
 148                 /* do nothing */
 149         }
 150         else if (result == 0)
 151         {
 152                 User::QuitUser(Server, cu, "Connection closed");
 153                 return;
 154         }
 155 }
 156
 157 /**
 158  * This function is called once a second from the mainloop.
 159  * It is intended to do background checking on all the user structs, e.g.
 160  * stuff like ping checks, registration timeouts, etc.
 161  */
 162 void InspIRCd::DoBackgroundUserStuff()
 163 {
 164         /*
 165          * loop over all local users..
 166          */
 167         for (std::vector<User*>::iterator count2 = local_users.begin(); count2 != local_users.end(); count2++)
 168         {
 169                 User *curr = *count2;
 170
 171                 if (curr->Penalty)
 172                 {
 173                         curr->Penalty--;
 174                         if (curr->Penalty < 10)
 175                                 Parser->DoLines(curr, true);
 176                 }
 177
 178                 if (curr->OverPenalty)
 179                 {
 180                         if (curr->sendq.empty())
 181                                 curr->OverPenalty = false;
 182                 }
 183
 184                 if ((curr->registered != REG_ALL) && (TIME > curr->timeout))
 185                 {
 186                         /*
 187                          * registration timeout -- didnt send USER/NICK/HOST
 188                          * in the time specified in their connection class.
 189                          */
 190                         curr->muted = true;
 191                         User::QuitUser(this, curr, "Registration timeout");
 192                         continue;
 193                 }
 194
 195                 /*
 196                  * `ready` means that the user has provided NICK/USER(/PASS), and all modules agree
 197                  * that the user is okay to proceed. The one thing we are then waiting for now is DNS...
 198                  */
 199                 bool ready = ((curr->registered == REG_NICKUSER) && AllModulesReportReady(curr));
 200
 201                 if (ready)
 202                 {
 203                         if (curr->dns_done)
 204                         {
 205                                 /* DNS passed, connect the user */
 206                                 curr->FullConnect();
 207                                 continue;
 208                         }
 209                 }
 210
 211                 // It's time to PING this user. Send them a ping.
 212                 if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 213                 {
 214                         // This user didn't answer the last ping, remove them
 215                         if (!curr->lastping)
 216                         {
 217                                 time_t time = this->Time(false) - (curr->nping - curr->MyClass->GetPingTime());
 218                                 char message[MAXBUF];
 219                                 snprintf(message, MAXBUF, "Ping timeout: %ld second%s", (long)time, time > 1 ? "s" : "");
 220                                 curr->muted = true;
 221                                 curr->lastping = 1;
 222                                 curr->nping = TIME + curr->MyClass->GetPingTime();
 223                                 User::QuitUser(this, curr, message);
 224                                 continue;
 225                         }
 226                         curr->Write("PING :%s",this->Config->ServerName);
 227                         curr->lastping = 0;
 228                         curr->nping = TIME  +curr->MyClass->GetPingTime();
 229                 }
 230         }
 231 }
 232