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