1
|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2007 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "configreader.h"
#include "users.h"
#include "modules.h"
#include "wildcard.h"
#include "xline.h"
#include "socketengine.h"
#include "command_parse.h"
void InspIRCd::FloodQuitUser(userrec* current)
{
this->Log(DEFAULT,"Excess flood from: %s@%s", current->ident, current->host);
this->SNO->WriteToSnoMask('f',"Excess flood from: %s%s%s@%s",
current->registered == REG_ALL ? current->nick : "",
current->registered == REG_ALL ? "!" : "", current->ident, current->host);
current->SetWriteError("Excess flood");
if (current->registered != REG_ALL)
{
XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
XLines->apply_lines(APPLY_ZLINES);
}
}
void InspIRCd::ProcessUser(userrec* cu)
{
int result = EAGAIN;
if (cu->GetFd() == FD_MAGIC_NUMBER)
return;
if (this->Config->GetIOHook(cu->GetPort()))
{
int result2 = 0;
int MOD_RESULT = 0;
try
{
MOD_RESULT = this->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->GetFd(),ReadBuffer,sizeof(ReadBuffer),result2);
}
catch (CoreException& modexcept)
{
this->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
}
if (MOD_RESULT < 0)
{
result = -EAGAIN;
}
else
{
result = result2;
}
}
else
{
result = cu->ReadData(ReadBuffer, sizeof(ReadBuffer));
}
if ((result) && (result != -EAGAIN))
{
userrec *current;
int currfd;
int floodlines = 0;
this->stats->statsRecv += result;
/*
* perform a check on the raw buffer as an array (not a string!) to remove
* character 0 which is illegal in the RFC - replace them with spaces.
* XXX - no garauntee there's not \0's in the middle of the data,
* and no reason for it to be terminated either. -- Om
*/
for (int checker = 0; checker < result; checker++)
{
if (ReadBuffer[checker] == 0)
ReadBuffer[checker] = ' ';
}
if (result > 0)
ReadBuffer[result] = '\0';
current = cu;
currfd = current->GetFd();
// add the data to the users buffer
if (result > 0)
{
if (!current->AddBuffer(ReadBuffer))
{
// AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
if (current->registered == REG_ALL)
{
// Make sure they arn't flooding long lines.
if (TIME > current->reset_due)
{
current->reset_due = TIME + current->threshold;
current->lines_in = 0;
}
current->lines_in++;
if (current->flood && current->lines_in > current->flood)
FloodQuitUser(current);
else
{
current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over %d chars) Please shorten it.", current->nick, MAXBUF-2);
current->recvq.clear();
}
}
else
FloodQuitUser(current);
return;
}
// while there are complete lines to process...
while (current->BufferIsReady())
{
if (TIME > current->reset_due)
{
current->reset_due = TIME + current->threshold;
current->lines_in = 0;
}
if (++current->lines_in > current->flood && current->flood)
{
FloodQuitUser(current);
return;
}
if ((++floodlines > current->flood) && (current->flood != 0))
{
FloodQuitUser(current);
return;
}
// use GetBuffer to copy single lines into the sanitized string
std::string single_line = current->GetBuffer();
current->bytes_in += single_line.length();
current->cmds_in++;
if (single_line.length() > MAXBUF - 2) /* MAXBUF is 514 to allow for neccessary line terminators */
single_line.resize(MAXBUF - 2); /* So to trim to 512 here, we use MAXBUF - 2 */
EventHandler* old_comp = this->SE->GetRef(currfd);
this->Parser->ProcessBuffer(single_line,current);
/*
* look for the user's record in case it's changed... if theyve quit,
* we cant do anything more with their buffer, so bail.
* there used to be an ugly, slow loop here. Now we have a reference
* table, life is much easier (and FASTER)
*/
EventHandler* new_comp = this->SE->GetRef(currfd);
if (new_comp != old_comp)
return;
}
return;
}
if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
{
cu->SetWriteError(strerror(errno));
return;
}
}
// result EAGAIN means nothing read
else if ((result == EAGAIN) || (result == -EAGAIN))
{
/* do nothing */
}
else if (result == 0)
{
cu->SetWriteError("Connection closed");
return;
}
}
/**
* This function is called once a second from the mainloop.
* It is intended to do background checking on all the user structs, e.g.
* stuff like ping checks, registration timeouts, etc.
*/
void InspIRCd::DoBackgroundUserStuff(time_t TIME)
{
/* Is it time yet? */
if (TIME < next_call)
return;
else
{
/* Time we actually need to call this again */
const time_t DUMMY_VALUE = 32768;
next_call = TIME + DUMMY_VALUE;
/* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
for (unsigned long count2 = 0; count2 != this->local_users.size(); count2++)
{
if (count2 >= this->local_users.size())
break;
userrec* curr = this->local_users[count2];
if (curr)
{
/*
* registration timeout -- didnt send USER/NICK/HOST
* in the time specified in their connection class.
*/
if ((TIME > curr->timeout) && (curr->registered != REG_ALL))
{
curr->muted = true;
GlobalCulls.AddItem(curr,"Registration timeout");
continue;
}
else
{
if ((curr->registered != REG_ALL) && (next_call > (time_t)curr->timeout))
next_call = curr->timeout;
}
/*
* user has signed on with USER/NICK/PASS, and dns has completed, all the modules
* say this user is ok to proceed, fully connect them.
*/
bool ready = AllModulesReportReady(curr);
if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (ready))
{
if (!curr->dns_done)
{
curr->WriteServ("NOTICE Auth :*** Could not resolve your hostname: Request timed out; using your IP address (%s) instead.", curr->GetIPString());
curr->dns_done = true;
}
this->stats->statsDnsBad++;
curr->FullConnect();
continue;
}
else
{
if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon))
next_call = curr->signon;
}
if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (ready))
{
curr->FullConnect();
continue;
}
else
{
if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon + this->Config->dns_timeout))
next_call = curr->signon + this->Config->dns_timeout;
}
// It's time to PING this user. Send them a ping.
if ((TIME > curr->nping) && (curr->registered == REG_ALL))
{
// This user didn't answer the last ping, remove them
if (!curr->lastping)
{
/* Everybody loves boobies. */
time_t time = this->Time(false) - (curr->nping - curr->pingmax);
char message[MAXBUF];
snprintf(message, MAXBUF, "Ping timeout: %ld second%s", time, time > 1 ? "s" : "");
curr->muted = true;
GlobalCulls.AddItem(curr, message);
curr->lastping = 1;
curr->nping = TIME+curr->pingmax;
continue;
}
curr->Write("PING :%s",this->Config->ServerName);
curr->lastping = 0;
curr->nping = TIME+curr->pingmax;
}
else
{
if ((curr->registered == REG_ALL) && (next_call > curr->nping))
next_call = curr->nping;
}
}
}
/* If theres nothing to do, trigger in the next second, something might come up */
time_t delta = next_call - TIME;
if (delta == DUMMY_VALUE)
{
next_call = TIME + 1;
delta = 1;
}
}
}
|
