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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2008 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 "m_spanningtree/main.h"
#include "m_spanningtree/utils.h"
#include "m_spanningtree/treeserver.h"
#include "m_spanningtree/link.h"
#include "m_spanningtree/treesocket.h"
#include "m_spanningtree/resolvers.h"
#include "m_spanningtree/handshaketimer.h"
/* $ModDep: m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h m_hash.h m_spanningtree/handshaketimer.h */
bool TreeSocket::ParseUID(const std::string &source, std::deque<std::string> ¶ms)
{
/** Do we have enough parameters:
* 0 1 2 3 4 5 6 7 8 9 (n-1)
* UID uuid age nick host dhost ident ip.string signon +modes (modepara) :gecos
*/
if (params.size() < 10)
{
this->SendError("Invalid client introduction (wanted 10 or more parameters, got " + (params.empty() ? "0" : ConvToStr(params.size())) + "!)");
return false;
}
time_t age_t = ConvToInt(params[1]);
time_t signon = ConvToInt(params[7]);
std::string empty;
TreeServer* remoteserver = Utils->FindServer(source);
if (!remoteserver)
{
this->SendError("Invalid client introduction (Unknown server "+source+")");
return false;
}
/* Check parameters for validity before introducing the client, discovered by dmb */
else if (!age_t)
{
this->SendError("Invalid client introduction (Invalid TS?)");
return false;
}
else if (!signon)
{
this->SendError("Invalid client introduction (Invalid signon?)");
return false;
}
else if (params[8][0] != '+')
{
this->SendError("Invalid client introduction (Malformed MODE sequence?)");
return false;
}
/* check for collision */
user_hash::iterator iter = this->ServerInstance->Users->clientlist->find(params[2]);
if (iter != this->ServerInstance->Users->clientlist->end())
{
/*
* Nick collision.
*/
ServerInstance->Logs->Log("m_spanningtree",DEBUG,"*** Collision on %s", params[2].c_str());
int collide = this->DoCollision(iter->second, age_t, params[5], params[8], params[0]);
if (collide == 2)
{
/* remote client changed, make sure we change their nick for the hash too */
params[2] = params[0];
}
}
/* IMPORTANT NOTE: For remote users, we pass the UUID in the constructor. This automatically
* sets it up in the UUID hash for us.
*/
User* _new = NULL;
try
{
_new = new User(this->ServerInstance, params[0]);
}
catch (...)
{
this->SendError("Protocol violation - Duplicate UUID '" + params[0] + "' on introduction of new user");
return false;
}
(*(this->ServerInstance->Users->clientlist))[params[2]] = _new;
_new->SetFd(FD_MAGIC_NUMBER);
_new->nick.assign(params[2], 0, MAXBUF);
_new->host.assign(params[3], 0, 64);
_new->dhost.assign(params[4], 0, 64);
_new->server = this->ServerInstance->FindServerNamePtr(remoteserver->GetName().c_str());
_new->ident.assign(params[5], 0, MAXBUF);
_new->fullname.assign(params[params.size() - 1], 0, MAXBUF);
_new->registered = REG_ALL;
_new->signon = signon;
_new->age = age_t;
/* we need to remove the + from the modestring, so we can do our stuff */
std::string::size_type pos_after_plus = params[8].find_first_not_of('+');
if (pos_after_plus != std::string::npos)
params[8] = params[8].substr(pos_after_plus);
unsigned int paramptr = 9;
for (std::string::iterator v = params[8].begin(); v != params[8].end(); v++)
{
if (*v == '+')
continue;
/* For each mode thats set, increase counter */
ModeHandler* mh = ServerInstance->Modes->FindMode(*v, MODETYPE_USER);
if (mh)
{
if (mh->GetNumParams(true))
{
/* IMPORTANT NOTE:
* All modes are assumed to succeed here as they are being set by a remote server.
* Modes CANNOT FAIL here. If they DO fail, then the failure is ignored. This is important
* to note as all but one modules currently cannot ever fail in this situation, except for
* m_servprotect which specifically works this way to prevent the mode being set ANYWHERE
* but here, at client introduction. You may safely assume this behaviour is standard and
* will not change in future versions if you want to make use of this protective behaviour
* yourself.
*/
if (paramptr < params.size() - 1)
mh->OnModeChange(_new, _new, NULL, params[paramptr++], true);
else
{
this->SendError("Broken UID command, expected a parameter for user mode '"+ConvToStr(*v)+"' but there aren't enough parameters in the command!");
return false;
}
}
else
mh->OnModeChange(_new, _new, NULL, empty, true);
_new->SetMode(*v, true);
mh->ChangeCount(1);
}
else
{
// XXX: to avoid this, we really need to send u/cmodes in CAPAB like we do 005 (I've thought this a long time anyway..)
this->SendError("Warning: Broken UID command, unknown user mode '"+ConvToStr(*v)+"' in the mode string! (mismatched modules/bug?)");
return false;
}
}
/* now we've done with modes processing, put the + back for remote servers */
if (params[8][0] != '+')
params[8] = "+" + params[8];
#ifdef SUPPORT_IP6LINKS
if (params[6].find_first_of(":") != std::string::npos)
_new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
else
#endif
_new->SetSockAddr(AF_INET, params[6].c_str(), 0);
ServerInstance->Users->AddGlobalClone(_new);
bool dosend = true;
if ((this->Utils->quiet_bursts && remoteserver->bursting) || this->ServerInstance->SilentULine(_new->server))
dosend = false;
if (dosend)
this->ServerInstance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s] [%s]", _new->server, _new->nick.c_str(), _new->ident.c_str(), _new->host.c_str(), _new->GetIPString(), _new->fullname.c_str());
params[params.size() - 1] = ":" + params[params.size() - 1];
Utils->DoOneToAllButSender(source, "UID", params, source);
ServerInstance->PI->Introduce(_new);
FOREACH_MOD_I(ServerInstance,I_OnPostConnect,OnPostConnect(_new));
return true;
}
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