/** Returns the locally connected server we must route a
* message through to reach server 'ServerName'. This
* only applies to one-to-one and not one-to-many routing.
* See the comments for the constructor of TreeServer
* for more details.
*/
TreeServer* SpanningTreeUtilities::BestRouteTo(const std::string &ServerName)
{
TreeServer* Found = FindServer(ServerName);
if (Found)
{
return Found->GetRoute();
}
else
{
// Cheat a bit. This allows for (better) working versions of routing commands with nick based prefixes, without hassle
User *u = ServerInstance->FindNick(ServerName);
if (u)
{
Found = FindServer(u->server);
if (Found)
return Found->GetRoute();
}
return NULL;
}
}
CmdResult CommandUID::Handle(const parameterlist ¶ms, User* serversrc)
{
SpanningTreeUtilities* Utils = ((ModuleSpanningTree*)(Module*)creator)->Utils;
/** 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
*/
time_t age_t = ConvToInt(params[1]);
time_t signon = ConvToInt(params[7]);
std::string empty;
const std::string& modestr = params[8];
TreeServer* remoteserver = Utils->FindServer(serversrc->server);
if (!remoteserver)
return CMD_INVALID;
/* Is this a valid UID, and not misrouted? */
if (params[0].length() != 9 || params[0].substr(0,3) != serversrc->uuid)
return CMD_INVALID;
/* Check parameters for validity before introducing the client, discovered by dmb */
if (!age_t)
return CMD_INVALID;
if (!signon)
return CMD_INVALID;
if (modestr[0] != '+')
return CMD_INVALID;
TreeSocket* sock = remoteserver->GetRoute()->GetSocket();
/* check for collision */
user_hash::iterator iter = ServerInstance->Users->clientlist->find(params[2]);
if (iter != ServerInstance->Users->clientlist->end())
{
/*
* Nick collision.
*/
int collide = sock->DoCollision(iter->second, age_t, params[5], params[6], params[0]);
ServerInstance->Logs->Log("m_spanningtree",LOG_DEBUG,"*** Collision on %s, collide=%d", params[2].c_str(), collide);
if (collide != 1)
{
/* remote client lost, make sure we change their nick for the hash too
*
* This alters the line that will be sent to other servers, which
* commands normally shouldn't do; hence the required const_cast.
*/
const_cast<parameterlist&>(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 RemoteUser(params[0], remoteserver->GetName());
}
catch (...)
{
ServerInstance->Logs->Log("m_spanningtree", LOG_DEFAULT, "Duplicate UUID %s in client introduction", params[0].c_str());
return CMD_INVALID;
}
(*(ServerInstance->Users->clientlist))[params[2]] = _new;
_new->nick = params[2];
_new->host = params[3];
_new->dhost = params[4];
_new->ident = params[5];
_new->fullname = params[params.size() - 1];
_new->registered = REG_ALL;
_new->signon = signon;
_new->age = age_t;
unsigned int paramptr = 9;
// Accept more '+' chars, for now
std::string::size_type pos = modestr.find_first_not_of('+');
for (std::string::const_iterator v = modestr.begin()+pos; v != modestr.end(); ++v)
{
/* For each mode thats set, find the mode handler and set it on the new user */
ModeHandler* mh = ServerInstance->Modes->FindMode(*v, MODETYPE_USER);
if (!mh)
{
ServerInstance->Logs->Log("m_spanningtree", LOG_DEFAULT, "Unrecognised mode '%c' for a user in UID, dropping link", *v);
return CMD_INVALID;
}
if (mh->GetNumParams(true))
{
if (paramptr >= params.size() - 1)
return CMD_INVALID;
std::string mp = params[paramptr++];
/* 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.
*/
mh->OnModeChange(_new, _new, NULL, mp, true);
}
else
mh->OnModeChange(_new, _new, NULL, empty, true);
_new->SetMode(*v, true);
}
_new->SetClientIP(params[6].c_str());
ServerInstance->Users->AddGlobalClone(_new);
remoteserver->UserCount++;
bool dosend = true;
if ((Utils->quiet_bursts && remoteserver->bursting) || ServerInstance->SilentULine(_new->server))
dosend = false;
if (dosend)
ServerInstance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s (%s) [%s]", _new->server.c_str(), _new->GetFullRealHost().c_str(), _new->GetIPString().c_str(), _new->fullname.c_str());
FOREACH_MOD(I_OnPostConnect,OnPostConnect(_new));
return CMD_SUCCESS;
}