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 #include "inspircd.h"
  15 #include "wildcard.h"
  16 #include "xline.h"
  17 #include "socketengine.h"
  18 #include "command_parse.h"
  19
  20 void FloodQuitUserHandler::Call(User* current)
  21 {
  22         Server->Log(DEFAULT,"Excess flood from: %s@%s", current->ident, current->host);
  23         Server->SNO->WriteToSnoMask('f',"Excess flood from: %s%s%s@%s",
  24                         current->registered == REG_ALL ? current->nick : "",
  25                         current->registered == REG_ALL ? "!" : "", current->ident, current->host);
  26         User::QuitUser(Server, current, "Excess flood");
  27         if (current->registered != REG_ALL)
  28         {
  29                 Server->XLines->add_zline(120, Server->Config->ServerName, "Flood from unregistered connection", current->GetIPString());
  30                 Server->XLines->apply_lines(APPLY_ZLINES);
  31         }
  32 }
  33
  34 void ProcessUserHandler::Call(User* cu)
  35 {
  36         int result = EAGAIN;
  37
  38         if (cu->GetFd() == FD_MAGIC_NUMBER)
  39                 return;
  40
  41         char* ReadBuffer = Server->GetReadBuffer();
  42
  43         if (Server->Config->GetIOHook(cu->GetPort()))
  44         {
  45                 int result2 = 0;
  46                 int MOD_RESULT = 0;
  47
  48                 try
  49                 {
  50                         MOD_RESULT = Server->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->GetFd(),ReadBuffer,sizeof(ReadBuffer),result2);
  51                 }
  52                 catch (CoreException& modexcept)
  53                 {
  54                         Server->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  55                 }
  56
  57                 if (MOD_RESULT < 0)
  58                 {
  59                         result = -EAGAIN;
  60                 }
  61                 else
  62                 {
  63                         result = result2;
  64                 }
  65         }
  66         else
  67         {
  68                 result = cu->ReadData(ReadBuffer, sizeof(ReadBuffer));
  69         }
  70
  71         if ((result) && (result != -EAGAIN))
  72         {
  73                 User *current;
  74                 int currfd;
  75
  76                 Server->stats->statsRecv += result;
  77                 /*
  78                  * perform a check on the raw buffer as an array (not a string!) to remove
  79                  * character 0 which is illegal in the RFC - replace them with spaces.
  80                  */
  81
  82                 for (int checker = 0; checker < result; checker++)
  83                 {
  84                         if (ReadBuffer[checker] == 0)
  85                                 ReadBuffer[checker] = ' ';
  86                 }
  87
  88                 if (result > 0)
  89                         ReadBuffer[result] = '\0';
  90
  91                 current = cu;
  92                 currfd = current->GetFd();
  93
  94                 // add the data to the users buffer
  95                 if (result > 0)
  96                 {
  97                         if (!current->AddBuffer(ReadBuffer))
  98                         {
  99                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 100                                 if (current->registered == REG_ALL)
 101                                 {
 102                                         // Make sure they arn't flooding long lines.
 103                                         if (Server->Time() > current->reset_due)
 104                                         {
 105                                                 current->reset_due = Server->Time() + current->threshold;
 106                                                 current->lines_in = 0;
 107                                         }
 108
 109                                         current->lines_in++;
 110
 111                                         if (current->flood && current->lines_in > current->flood)
 112                                                 Server->FloodQuitUser(current);
 113                                         else
 114                                         {
 115                                                 current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over %d chars) Please shorten it.", current->nick, MAXBUF-2);
 116                                                 current->recvq.clear();
 117                                         }
 118                                 }
 119                                 else
 120                                         Server->FloodQuitUser(current);
 121
 122                                 return;
 123                         }
 124
 125                         /* If user is over penalty, dont process here, just build up */
 126                         if (!current->OverPenalty)
 127                                 Server->Parser->DoLines(current);
 128
 129                         return;
 130                 }
 131
 132                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 133                 {
 134                         User::QuitUser(Server, cu, errno ? strerror(errno) : "EOF from client");
 135                         return;
 136                 }
 137         }
 138
 139         // result EAGAIN means nothing read
 140         else if ((result == EAGAIN) || (result == -EAGAIN))
 141         {
 142                 /* do nothing */
 143         }
 144         else if (result == 0)
 145         {
 146                 User::QuitUser(Server, cu, "Connection closed");
 147                 return;
 148         }
 149 }
 150
 151 /**
 152  * This function is called once a second from the mainloop.
 153  * It is intended to do background checking on all the user structs, e.g.
 154  * stuff like ping checks, registration timeouts, etc.
 155  */
 156 void InspIRCd::DoBackgroundUserStuff()
 157 {
 158         /*
 159          * loop over all local users..
 160          */
 161         for (std::vector<User*>::iterator count2 = local_users.begin(); count2 != local_users.end(); count2++)
 162         {
 163                 User *curr = *count2;
 164
 165                 if (curr->Penalty)
 166                         curr->Penalty--;
 167
 168                 if (curr->OverPenalty)
 169                 {
 170                         if (curr->sendq.empty())
 171                                 curr->OverPenalty = false;
 172
 173                         if (curr->Penalty < 10)
 174                                 Parser->DoLines(curr, true);
 175                 }
 176
 177                 if ((curr->registered != REG_ALL) && (TIME > curr->timeout))
 178                 {
 179                         /*
 180                          * registration timeout -- didnt send USER/NICK/HOST
 181                          * in the time specified in their connection class.
 182                          */
 183                         curr->muted = true;
 184                         User::QuitUser(this, curr, "Registration timeout");
 185                         continue;
 186                 }
 187
 188                 /*
 189                  * `ready` means that the user has provided NICK/USER(/PASS), and all modules agree
 190                  * that the user is okay to proceed. The one thing we are then waiting for is DNS, which we do here...
 191                  */
 192                 bool ready = ((curr->registered == REG_NICKUSER) && AllModulesReportReady(curr));
 193
 194                 if (ready)
 195                 {
 196                         if (!curr->dns_done)
 197                         {
 198                                 /*
 199                                  * DNS isn't done yet?
 200                                  * Cool. Check for timeout.
 201                                  */
 202                                 if (TIME > curr->signon)
 203                                 {
 204                                         /* FZZZZZZZZT, timeout! */
 205                                         curr->WriteServ("NOTICE Auth :*** Could not resolve your hostname: Request timed out; using your IP address (%s) instead.", curr->GetIPString());
 206                                         curr->dns_done = true;
 207                                         this->stats->statsDnsBad++;
 208                                         curr->FullConnect();
 209                                         continue;
 210                                 }
 211                         }
 212                         else
 213                         {
 214                                 /* DNS passed, connect the user */
 215                                 curr->FullConnect();
 216                                 continue;
 217                         }
 218                 }
 219
 220                 // It's time to PING this user. Send them a ping.
 221                 if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 222                 {
 223                         // This user didn't answer the last ping, remove them
 224                         if (!curr->lastping)
 225                         {
 226                                 time_t time = this->Time(false) - (curr->nping - curr->pingmax);
 227                                 char message[MAXBUF];
 228                                 snprintf(message, MAXBUF, "Ping timeout: %ld second%s", (long)time, time > 1 ? "s" : "");
 229                                 curr->muted = true;
 230                                 curr->lastping = 1;
 231                                 curr->nping = TIME+curr->pingmax;
 232                                 User::QuitUser(this, curr, message);
 233                                 continue;
 234                         }
 235                         curr->Write("PING :%s",this->Config->ServerName);
 236                         curr->lastping = 0;
 237                         curr->nping = TIME+curr->pingmax;
 238                 }
 239         }
 240 }
 241