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 "configreader.h"
  16 #include "users.h"
  17 #include "modules.h"
  18 #include "wildcard.h"
  19 #include "xline.h"
  20 #include "socketengine.h"
  21 #include "command_parse.h"
  22
  23 void InspIRCd::FloodQuitUser(userrec* current)
  24 {
  25         this->Log(DEFAULT,"Excess flood from: %s@%s", current->ident, current->host);
  26         this->SNO->WriteToSnoMask('f',"Excess flood from: %s%s%s@%s",
  27                         current->registered == REG_ALL ? current->nick : "",
  28                         current->registered == REG_ALL ? "!" : "", current->ident, current->host);
  29         current->SetWriteError("Excess flood");
  30         if (current->registered != REG_ALL)
  31         {
  32                 XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
  33                 XLines->apply_lines(APPLY_ZLINES);
  34         }
  35 }
  36
  37 void InspIRCd::ProcessUser(userrec* cu)
  38 {
  39         int result = EAGAIN;
  40
  41         if (cu->GetFd() == FD_MAGIC_NUMBER)
  42                 return;
  43
  44         if (this->Config->GetIOHook(cu->GetPort()))
  45         {
  46                 int result2 = 0;
  47                 int MOD_RESULT = 0;
  48
  49                 try
  50                 {
  51                         MOD_RESULT = this->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->GetFd(),ReadBuffer,sizeof(ReadBuffer),result2);
  52                 }
  53                 catch (CoreException& modexcept)
  54                 {
  55                         this->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  56                 }
  57
  58                 if (MOD_RESULT < 0)
  59                 {
  60                         result = -EAGAIN;
  61                 }
  62                 else
  63                 {
  64                         result = result2;
  65                 }
  66         }
  67         else
  68         {
  69                 result = cu->ReadData(ReadBuffer, sizeof(ReadBuffer));
  70         }
  71
  72         if ((result) && (result != -EAGAIN))
  73         {
  74                 userrec *current;
  75                 int currfd;
  76                 int floodlines = 0;
  77
  78                 this->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                  * XXX - no garauntee there's not \0's in the middle of the data,
  83                  *       and no reason for it to be terminated either. -- Om
  84                  */
  85
  86                 for (int checker = 0; checker < result; checker++)
  87                 {
  88                         if (ReadBuffer[checker] == 0)
  89                                 ReadBuffer[checker] = ' ';
  90                 }
  91
  92                 if (result > 0)
  93                         ReadBuffer[result] = '\0';
  94
  95                 current = cu;
  96                 currfd = current->GetFd();
  97
  98                 // add the data to the users buffer
  99                 if (result > 0)
 100                 {
 101                         if (!current->AddBuffer(ReadBuffer))
 102                         {
 103                                 // AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
 104                                 if (current->registered == REG_ALL)
 105                                 {
 106                                         // Make sure they arn't flooding long lines.
 107                                         if (TIME > current->reset_due)
 108                                         {
 109                                                 current->reset_due = TIME + current->threshold;
 110                                                 current->lines_in = 0;
 111                                         }
 112
 113                                         current->lines_in++;
 114
 115                                         if (current->flood && current->lines_in > current->flood)
 116                                                 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                                 else
 124                                         FloodQuitUser(current);
 125
 126                                 return;
 127                         }
 128
 129                         // while there are complete lines to process...
 130                         while (current->BufferIsReady())
 131                         {
 132                                 if (TIME > current->reset_due)
 133                                 {
 134                                         current->reset_due = TIME + current->threshold;
 135                                         current->lines_in = 0;
 136                                 }
 137
 138                                 if (++current->lines_in > current->flood && current->flood)
 139                                 {
 140                                         FloodQuitUser(current);
 141                                         return;
 142                                 }
 143
 144                                 if ((++floodlines > current->flood) && (current->flood != 0))
 145                                 {
 146                                         FloodQuitUser(current);
 147                                         return;
 148                                 }
 149
 150                                 // use GetBuffer to copy single lines into the sanitized string
 151                                 std::string single_line = current->GetBuffer();
 152                                 current->bytes_in += single_line.length();
 153                                 current->cmds_in++;
 154                                 if (single_line.length() > MAXBUF - 2)  /* MAXBUF is 514 to allow for neccessary line terminators */
 155                                         single_line.resize(MAXBUF - 2); /* So to trim to 512 here, we use MAXBUF - 2 */
 156
 157                                 this->Parser->ProcessBuffer(single_line, current);
 158                         }
 159
 160                         return;
 161                 }
 162
 163                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 164                 {
 165                         userrec::QuitUser(this, cu, errno ? strerror(errno) : "EOF from client");
 166                         return;
 167                 }
 168         }
 169
 170         // result EAGAIN means nothing read
 171         else if ((result == EAGAIN) || (result == -EAGAIN))
 172         {
 173                 /* do nothing */
 174         }
 175         else if (result == 0)
 176         {
 177                 userrec::QuitUser(this, cu, "Connection closed");
 178                 return;
 179         }
 180 }
 181
 182 /**
 183  * This function is called once a second from the mainloop.
 184  * It is intended to do background checking on all the user structs, e.g.
 185  * stuff like ping checks, registration timeouts, etc.
 186  */
 187 void InspIRCd::DoBackgroundUserStuff(time_t TIME)
 188 {
 189         /* Is it time yet? */
 190         if (TIME < next_call)
 191                 return;
 192         else
 193         {
 194                 /* Time we actually need to call this again */
 195                 const time_t DUMMY_VALUE = 32768;
 196                 next_call = TIME + DUMMY_VALUE;
 197
 198                 /* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
 199                 for (std::vector<userrec*>::iterator count2 = local_users.begin(); count2 != local_users.end(); ++count2)
 200                 {
 201                         userrec* curr = *count2;
 202
 203                         /*
 204                          * registration timeout -- didnt send USER/NICK/HOST
 205                          * in the time specified in their connection class.
 206                          */
 207                         if ((TIME > curr->timeout) && (curr->registered != REG_ALL))
 208                         {
 209                                 curr->muted = true;
 210                                 userrec::QuitUser(this, curr, "Registration timeout");
 211                                 continue;
 212                         }
 213                         else
 214                         {
 215                                 if ((curr->registered != REG_ALL) && (next_call > (time_t)curr->timeout))
 216                                         next_call = curr->timeout;
 217                         }
 218                         /*
 219                          * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 220                          * say this user is ok to proceed, fully connect them.
 221                          */
 222                         bool ready = AllModulesReportReady(curr);
 223                         if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (ready))
 224                         {
 225                                 if (!curr->dns_done)
 226                                 {
 227                                         curr->WriteServ("NOTICE Auth :*** Could not resolve your hostname: Request timed out; using your IP address (%s) instead.", curr->GetIPString());
 228                                         curr->dns_done = true;
 229                                 }
 230                                 this->stats->statsDnsBad++;
 231                                 curr->FullConnect();
 232                                 continue;
 233                         }
 234                         else
 235                         {
 236                                 if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon))
 237                                         next_call = curr->signon;
 238                         }
 239
 240                         if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (ready))
 241                         {
 242                                 curr->FullConnect();
 243                                 continue;
 244                         }
 245                         else
 246                         {
 247                                 if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon + this->Config->dns_timeout))
 248                                         next_call = curr->signon + this->Config->dns_timeout;
 249                         }
 250
 251                         // It's time to PING this user. Send them a ping.
 252                         if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 253                         {
 254                                 // This user didn't answer the last ping, remove them
 255                                 if (!curr->lastping)
 256                                 {
 257                                         /* Everybody loves boobies. */
 258                                         time_t time = this->Time(false) - (curr->nping - curr->pingmax);
 259                                         char message[MAXBUF];
 260                                         snprintf(message, MAXBUF, "Ping timeout: %ld second%s", (long)time, time > 1 ? "s" : "");
 261                                         curr->muted = true;
 262                                         curr->lastping = 1;
 263                                         curr->nping = TIME+curr->pingmax;
 264                                         userrec::QuitUser(this, curr, message);
 265                                         continue;
 266                                 }
 267                                 curr->Write("PING :%s",this->Config->ServerName);
 268                                 curr->lastping = 0;
 269                                 curr->nping = TIME+curr->pingmax;
 270                         }
 271                         else
 272                         {
 273                                 if ((curr->registered == REG_ALL) && (next_call > curr->nping))
 274                                         next_call = curr->nping;
 275                         }
 276                 }
 277
 278                 /* If theres nothing to do, trigger in the next second, something might come up */
 279                 time_t delta = next_call - TIME;
 280                 if (delta == DUMMY_VALUE)
 281                 {
 282                         next_call = TIME + 1;
 283                         delta = 1;
 284                 }
 285         }
 286 }