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                 int floodlines = 0;
  76
  77                 Server->stats->statsRecv += result;
  78                 /*
  79                  * perform a check on the raw buffer as an array (not a string!) to remove
  80                  * character 0 which is illegal in the RFC - replace them with spaces.
  81                  */
  82
  83                 for (int checker = 0; checker < result; checker++)
  84                 {
  85                         if (ReadBuffer[checker] == 0)
  86                                 ReadBuffer[checker] = ' ';
  87                 }
  88
  89                 if (result > 0)
  90                         ReadBuffer[result] = '\0';
  91
  92                 current = cu;
  93                 currfd = current->GetFd();
  94
  95                 // add the data to the users buffer
  96                 if (result > 0)
  97                 {
  98                         if (!current->AddBuffer(ReadBuffer))
  99                         {
 100                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 101                                 if (current->registered == REG_ALL)
 102                                 {
 103                                         // Make sure they arn't flooding long lines.
 104                                         if (Server->Time() > current->reset_due)
 105                                         {
 106                                                 current->reset_due = Server->Time() + current->threshold;
 107                                                 current->lines_in = 0;
 108                                         }
 109
 110                                         current->lines_in++;
 111
 112                                         if (current->flood && current->lines_in > current->flood)
 113                                                 Server->FloodQuitUser(current);
 114                                         else
 115                                         {
 116                                                 current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over %d chars) Please shorten it.", current->nick, MAXBUF-2);
 117                                                 current->recvq.clear();
 118                                         }
 119                                 }
 120                                 else
 121                                         Server->FloodQuitUser(current);
 122
 123                                 return;
 124                         }
 125
 126                         // while there are complete lines to process...
 127                         while (current->BufferIsReady())
 128                         {
 129                                 if (Server->Time() > current->reset_due)
 130                                 {
 131                                         current->reset_due = Server->Time() + current->threshold;
 132                                         current->lines_in = 0;
 133                                 }
 134
 135                                 if (++current->lines_in > current->flood && current->flood)
 136                                 {
 137                                         Server->FloodQuitUser(current);
 138                                         return;
 139                                 }
 140
 141                                 if ((++floodlines > current->flood) && (current->flood != 0))
 142                                 {
 143                                         Server->FloodQuitUser(current);
 144                                         return;
 145                                 }
 146
 147                                 // use GetBuffer to copy single lines into the sanitized string
 148                                 std::string single_line = current->GetBuffer();
 149                                 current->bytes_in += single_line.length();
 150                                 current->cmds_in++;
 151                                 if (single_line.length() > MAXBUF - 2)  /* MAXBUF is 514 to allow for neccessary line terminators */
 152                                         single_line.resize(MAXBUF - 2); /* So to trim to 512 here, we use MAXBUF - 2 */
 153
 154                                 Server->Parser->ProcessBuffer(single_line, current);
 155                         }
 156
 157                         return;
 158                 }
 159
 160                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 161                 {
 162                         User::QuitUser(Server, cu, errno ? strerror(errno) : "EOF from client");
 163                         return;
 164                 }
 165         }
 166
 167         // result EAGAIN means nothing read
 168         else if ((result == EAGAIN) || (result == -EAGAIN))
 169         {
 170                 /* do nothing */
 171         }
 172         else if (result == 0)
 173         {
 174                 User::QuitUser(Server, cu, "Connection closed");
 175                 return;
 176         }
 177 }
 178
 179 /**
 180  * This function is called once a second from the mainloop.
 181  * It is intended to do background checking on all the user structs, e.g.
 182  * stuff like ping checks, registration timeouts, etc.
 183  */
 184 void InspIRCd::DoBackgroundUserStuff(time_t TIME)
 185 {
 186         /* Is it time yet? */
 187         if (TIME < next_call)
 188                 return;
 189         else
 190         {
 191                 /* Time we actually need to call this again */
 192                 const time_t DUMMY_VALUE = 32768;
 193                 next_call = TIME + DUMMY_VALUE;
 194
 195                 for (std::vector<User*>::iterator count2 = local_users.begin(); count2 != local_users.end(); count2++)
 196                 {
 197                         User* curr = *count2;
 198
 199                         /*
 200                          * registration timeout -- didnt send USER/NICK/HOST
 201                          * in the time specified in their connection class.
 202                          */
 203                         if ((TIME > curr->timeout) && (curr->registered != REG_ALL))
 204                         {
 205                                 curr->muted = true;
 206                                 User::QuitUser(this, curr, "Registration timeout");
 207                                 continue;
 208                         }
 209                         else
 210                         {
 211                                 if ((curr->registered != REG_ALL) && (next_call > (time_t)curr->timeout))
 212                                         next_call = curr->timeout;
 213                         }
 214                         /*
 215                          * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 216                          * say this user is ok to proceed, fully connect them.
 217                          */
 218                         bool ready = AllModulesReportReady(curr);
 219                         if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (ready))
 220                         {
 221                                 if (!curr->dns_done)
 222                                 {
 223                                         curr->WriteServ("NOTICE Auth :*** Could not resolve your hostname: Request timed out; using your IP address (%s) instead.", curr->GetIPString());
 224                                         curr->dns_done = true;
 225                                 }
 226                                 this->stats->statsDnsBad++;
 227                                 curr->FullConnect();
 228                                 continue;
 229                         }
 230                         else
 231                         {
 232                                 if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon))
 233                                         next_call = curr->signon;
 234                         }
 235
 236                         if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (ready))
 237                         {
 238                                 curr->FullConnect();
 239                                 continue;
 240                         }
 241                         else
 242                         {
 243                                 if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon + this->Config->dns_timeout))
 244                                         next_call = curr->signon + this->Config->dns_timeout;
 245                         }
 246
 247                         // It's time to PING this user. Send them a ping.
 248                         if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 249                         {
 250                                 // This user didn't answer the last ping, remove them
 251                                 if (!curr->lastping)
 252                                 {
 253                                         /* Everybody loves boobies. */
 254                                         time_t time = this->Time(false) - (curr->nping - curr->pingmax);
 255                                         char message[MAXBUF];
 256                                         snprintf(message, MAXBUF, "Ping timeout: %ld second%s", (long)time, time > 1 ? "s" : "");
 257                                         curr->muted = true;
 258                                         curr->lastping = 1;
 259                                         curr->nping = TIME+curr->pingmax;
 260                                         User::QuitUser(this, curr, message);
 261                                         continue;
 262                                 }
 263                                 curr->Write("PING :%s",this->Config->ServerName);
 264                                 curr->lastping = 0;
 265                                 curr->nping = TIME+curr->pingmax;
 266                         }
 267                         else
 268                         {
 269                                 if ((curr->registered == REG_ALL) && (next_call > curr->nping))
 270                                         next_call = curr->nping;
 271                         }
 272                 }
 273
 274                 /* If theres nothing to do, trigger in the next second, something might come up */
 275                 time_t delta = next_call - TIME;
 276                 if (delta == DUMMY_VALUE)
 277                 {
 278                         next_call = TIME + 1;
 279                         delta = 1;
 280                 }
 281         }
 282 }
 283