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                                 EventHandler* old_comp = this->SE->GetRef(currfd);
 158
 159                                 this->Parser->ProcessBuffer(single_line,current);
 160                                 /*
 161                                  * look for the user's record in case it's changed... if theyve quit,
 162                                  * we cant do anything more with their buffer, so bail.
 163                                  * there used to be an ugly, slow loop here. Now we have a reference
 164                                  * table, life is much easier (and FASTER)
 165                                  */
 166                                 EventHandler* new_comp = this->SE->GetRef(currfd);
 167
 168                                 if (new_comp != old_comp)
 169                                         return;
 170                         }
 171
 172                         return;
 173                 }
 174
 175                 if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
 176                 {
 177                         cu->SetWriteError(errno ? strerror(errno) : "EOF from client");
 178                         return;
 179                 }
 180         }
 181
 182         // result EAGAIN means nothing read
 183         else if ((result == EAGAIN) || (result == -EAGAIN))
 184         {
 185                 /* do nothing */
 186         }
 187         else if (result == 0)
 188         {
 189                 cu->SetWriteError("Connection closed");
 190                 return;
 191         }
 192 }
 193
 194 /**
 195  * This function is called once a second from the mainloop.
 196  * It is intended to do background checking on all the user structs, e.g.
 197  * stuff like ping checks, registration timeouts, etc.
 198  */
 199 void InspIRCd::DoBackgroundUserStuff(time_t TIME)
 200 {
 201         /* Is it time yet? */
 202         if (TIME < next_call)
 203                 return;
 204         else
 205         {
 206                 /* Time we actually need to call this again */
 207                 const time_t DUMMY_VALUE = 32768;
 208                 next_call = TIME + DUMMY_VALUE;
 209
 210                 /* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
 211                 for (unsigned long count2 = 0; count2 != this->local_users.size(); count2++)
 212                 {
 213                         if (count2 >= this->local_users.size())
 214                                 break;
 215
 216                         userrec* curr = this->local_users[count2];
 217
 218                         if (curr)
 219                         {
 220                                 /*
 221                                  * registration timeout -- didnt send USER/NICK/HOST
 222                                  * in the time specified in their connection class.
 223                                  */
 224                                 if ((TIME > curr->timeout) && (curr->registered != REG_ALL))
 225                                 {
 226                                         curr->muted = true;
 227                                         userrec::QuitUser(this, curr, "Registration timeout");
 228                                         continue;
 229                                 }
 230                                 else
 231                                 {
 232                                         if ((curr->registered != REG_ALL) && (next_call > (time_t)curr->timeout))
 233                                                 next_call = curr->timeout;
 234                                 }
 235
 236                                 /*
 237                                  * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
 238                                  * say this user is ok to proceed, fully connect them.
 239                                  */
 240                                 bool ready = AllModulesReportReady(curr);
 241                                 if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (ready))
 242                                 {
 243                                         if (!curr->dns_done)
 244                                         {
 245                                                 curr->WriteServ("NOTICE Auth :*** Could not resolve your hostname: Request timed out; using your IP address (%s) instead.", curr->GetIPString());
 246                                                 curr->dns_done = true;
 247                                         }
 248                                         this->stats->statsDnsBad++;
 249                                         curr->FullConnect();
 250                                         continue;
 251                                 }
 252                                 else
 253                                 {
 254                                         if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon))
 255                                                 next_call = curr->signon;
 256                                 }
 257
 258                                 if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (ready))
 259                                 {
 260                                         curr->FullConnect();
 261                                         continue;
 262                                 }
 263                                 else
 264                                 {
 265                                         if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon + this->Config->dns_timeout))
 266                                                 next_call = curr->signon + this->Config->dns_timeout;
 267                                 }
 268
 269                                 // It's time to PING this user. Send them a ping.
 270                                 if ((TIME > curr->nping) && (curr->registered == REG_ALL))
 271                                 {
 272                                         // This user didn't answer the last ping, remove them
 273                                         if (!curr->lastping)
 274                                         {
 275                                                 /* Everybody loves boobies. */
 276                                                 time_t time = this->Time(false) - (curr->nping - curr->pingmax);
 277                                                 char message[MAXBUF];
 278                                                 snprintf(message, MAXBUF, "Ping timeout: %ld second%s", (long)time, time > 1 ? "s" : "");
 279                                                 curr->muted = true;
 280                                                 curr->lastping = 1;
 281                                                 curr->nping = TIME+curr->pingmax;
 282                                                 userrec::QuitUser(this, curr, message);
 283                                                 continue;
 284                                         }
 285                                         curr->Write("PING :%s",this->Config->ServerName);
 286                                         curr->lastping = 0;
 287                                         curr->nping = TIME+curr->pingmax;
 288                                 }
 289                                 else
 290                                 {
 291                                         if ((curr->registered == REG_ALL) && (next_call > curr->nping))
 292                                                 next_call = curr->nping;
 293                                 }
 294                         }
 295                 }
 296
 297                 /* If theres nothing to do, trigger in the next second, something might come up */
 298                 time_t delta = next_call - TIME;
 299                 if (delta == DUMMY_VALUE)
 300                 {
 301                         next_call = TIME + 1;
 302                         delta = 1;
 303                 }
 304         }
 305 }