CmdResult CommandAddLine::Handle(User* usr, std::vector<std::string>& params)
{
XLineFactory* xlf = ServerInstance->XLines->GetFactory(params[0]);
const std::string& setter = usr->nick;
if (!xlf)
{
ServerInstance->SNO->WriteToSnoMask('d',"%s sent me an unknown ADDLINE type (%s).",setter.c_str(),params[0].c_str());
return CMD_FAILURE;
}
XLine* xl = NULL;
try
{
xl = xlf->Generate(ServerInstance->Time(), ConvToInt(params[4]), params[2], params[5], params[1]);
}
catch (ModuleException &e)
{
ServerInstance->SNO->WriteToSnoMask('d',"Unable to ADDLINE type %s from %s: %s", params[0].c_str(), setter.c_str(), e.GetReason().c_str());
return CMD_FAILURE;
}
xl->SetCreateTime(ConvToInt(params[3]));
if (ServerInstance->XLines->AddLine(xl, NULL))
{
if (xl->duration)
{
std::string timestr = InspIRCd::TimeString(xl->expiry);
ServerInstance->SNO->WriteToSnoMask('X',"%s added %s%s on %s to expire on %s: %s",setter.c_str(),params[0].c_str(),params[0].length() == 1 ? "-line" : "",
params[1].c_str(), timestr.c_str(), params[5].c_str());
}
else
{
ServerInstance->SNO->WriteToSnoMask('X',"%s added permanent %s%s on %s: %s",setter.c_str(),params[0].c_str(),params[0].length() == 1 ? "-line" : "",
params[1].c_str(),params[5].c_str());
}
TreeServer* remoteserver = TreeServer::Get(usr);
if (!remoteserver->IsBursting())
{
ServerInstance->XLines->ApplyLines();
}
return CMD_SUCCESS;
}
else
{
delete xl;
return CMD_FAILURE;
}
}
time_t ServerCommand::ExtractTS(const std::string& tsstr)
{
time_t TS = ConvToInt(tsstr);
if (!TS)
throw ProtocolException("Invalid TS");
return TS;
}
void unserialize(SerializeFormat format, Extensible* container, const std::string& value)
{
if (format == FORMAT_NETWORK)
return;
callerid_data* dat = new callerid_data;
irc::commasepstream s(value);
std::string tok;
if (s.GetToken(tok))
dat->lastnotify = ConvToInt(tok);
while (s.GetToken(tok))
{
User *u = ServerInstance->FindNick(tok);
if ((u) && (u->registered == REG_ALL) && (!u->quitting))
{
if (dat->accepting.insert(u).second)
{
callerid_data* other = this->get(u, true);
other->wholistsme.push_back(dat);
}
}
}
void* old = set_raw(container, dat);
if (old)
this->free(old);
}
bool irc::tokenstream::GetToken(long &token)
{
std::string tok;
bool returnval = GetToken(tok);
token = ConvToInt(tok);
return returnval;
}
ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding)
{
if (adding)
{
std::string::size_type colon = parameter.find(':');
if ((colon == std::string::npos) || (parameter.find('-') != std::string::npos))
{
source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str());
return MODEACTION_DENY;
}
/* Set up the flood parameters for this channel */
unsigned int njoins = ConvToInt(parameter.substr(0, colon));
unsigned int nsecs = ConvToInt(parameter.substr(colon+1));
if ((njoins<1) || (nsecs<1))
{
source->WriteNumeric(608, "%s %s :Invalid flood parameter",source->nick.c_str(),channel->name.c_str());
return MODEACTION_DENY;
}
joinfloodsettings jfs(nsecs, njoins);
joinfloodsettings* f = ext.get(channel);
if ((f) && (*f == jfs))
// mode params match
return MODEACTION_DENY;
ext.set(channel, jfs);
parameter = ConvToStr(njoins) + ":" + ConvToStr(nsecs);
channel->SetModeParam(this, parameter);
return MODEACTION_ALLOW;
}
else
{
if (!channel->IsModeSet(this))
return MODEACTION_DENY;
joinfloodsettings* f = ext.get(channel);
if (f)
{
ext.unset(channel);
channel->SetModeParam(this, "");
return MODEACTION_ALLOW;
}
}
return MODEACTION_DENY;
}
ModeAction ModeChannelLimit::OnSet(User* user, Channel* chan, std::string& parameter)
{
int limit = ConvToInt(parameter);
if (limit < 0)
return MODEACTION_DENY;
ext.set(chan, limit);
return MODEACTION_ALLOW;
}
ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding)
{
if (adding)
{
std::string::size_type colon = parameter.find(':');
if (colon == std::string::npos || parameter.find('-') != std::string::npos)
{
source->WriteNumeric(608, "%s %s :Invalid slowmode parameter", source->nick.c_str(),channel->name.c_str());
return MODEACTION_DENY;
}
/* Set up the slowmode parameters for this channel */
unsigned int nlines = ConvToInt(parameter.substr(0, colon));
unsigned int nsecs = ConvToInt(parameter.substr(colon+1));
if ((nlines < 2) || nsecs < 1)
{
source->WriteNumeric(608, "%s %s :Invalid slowmode parameter", source->nick.c_str(), channel->name.c_str());
return MODEACTION_DENY;
}
slowmodesettings* f = ext.get(channel);
if (f && nlines == f->lines && nsecs == f->secs)
// mode params match
return MODEACTION_DENY;
ext.set(channel, new slowmodesettings(nlines, nsecs));
parameter = ConvToStr(nlines) + ":" + ConvToStr(nsecs);
channel->SetModeParam(GetModeChar(), parameter);
return MODEACTION_ALLOW;
}
else
{
if (!channel->IsModeSet(GetModeChar()))
return MODEACTION_DENY;
ext.unset(channel);
channel->SetModeParam(GetModeChar(), "");
return MODEACTION_ALLOW;
}
}
ModeAction OnSet(User* source, Channel* channel, std::string& parameter)
{
int v = ConvToInt(parameter);
if (v <= 0)
return MODEACTION_DENY;
if ((IS_LOCAL(source) && ((unsigned int)v > max)))
v = max;
ext.set(channel, new KickRejoinData(v));
return MODEACTION_ALLOW;
}
ModeAction OnSet(User* source, Channel* channel, std::string& parameter)
{
std::string::size_type colon = parameter.find(':');
if ((colon == std::string::npos) || (parameter.find('-') != std::string::npos))
{
source->WriteNumeric(608, "%s :Invalid flood parameter",channel->name.c_str());
return MODEACTION_DENY;
}
/* Set up the flood parameters for this channel */
unsigned int njoins = ConvToInt(parameter.substr(0, colon));
unsigned int nsecs = ConvToInt(parameter.substr(colon+1));
if ((njoins<1) || (nsecs<1))
{
source->WriteNumeric(608, "%s :Invalid flood parameter",channel->name.c_str());
return MODEACTION_DENY;
}
ext.set(channel, new joinfloodsettings(nsecs, njoins));
return MODEACTION_ALLOW;
}
/** FMODE command - server mode with timestamp checks */
CmdResult CommandFMode::Handle(User* who, std::vector<std::string>& params)
{
time_t TS = ConvToInt(params[1]);
if (!TS)
{
ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "*** BUG? *** TS of 0 sent to FMODE. Are some services authors smoking craq, or is it 1970 again?. Dropping link.");
ServerInstance->SNO->WriteToSnoMask('d', "WARNING: The server %s is sending FMODE with a TS of zero. Total craq, dropping link.", who->server->GetName().c_str());
return CMD_INVALID;
}
/* Extract the TS value of the object, either User or Channel */
time_t ourTS;
if (params[0][0] == '#')
{
Channel* chan = ServerInstance->FindChan(params[0]);
if (!chan)
/* Oops, channel doesn't exist! */
return CMD_FAILURE;
ourTS = chan->age;
}
else
{
User* user = ServerInstance->FindUUID(params[0]);
if (!user)
return CMD_FAILURE;
if (IS_SERVER(user))
return CMD_INVALID;
ourTS = user->age;
}
/* If the TS is greater than ours, we drop the mode and don't pass it anywhere.
*/
if (TS > ourTS)
return CMD_FAILURE;
/* TS is equal or less: Merge the mode changes into ours and pass on.
*/
std::vector<std::string> modelist;
modelist.reserve(params.size()-1);
/* Insert everything into modelist except the TS (params[1]) */
modelist.push_back(params[0]);
modelist.insert(modelist.end(), params.begin()+2, params.end());
ModeParser::ModeProcessFlag flags = ModeParser::MODE_LOCALONLY;
if ((TS == ourTS) && IS_SERVER(who))
flags |= ModeParser::MODE_MERGE;
ServerInstance->Modes->Process(modelist, who, flags);
return CMD_SUCCESS;
}
ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding)
{
if (adding)
{
std::string::size_type colon = parameter.find(':');
if ((colon == std::string::npos) || (parameter.find('-') != std::string::npos))
{
source->WriteNumeric(608, "%s :Invalid flood parameter", channel->name.c_str());
return MODEACTION_DENY;
}
/* Set up the flood parameters for this channel */
bool ban = (parameter[0] == '*');
unsigned int nlines = ConvToInt(parameter.substr(ban ? 1 : 0, ban ? colon-1 : colon));
unsigned int nsecs = ConvToInt(parameter.substr(colon+1));
if ((nlines<2) || (nsecs<1))
{
source->WriteNumeric(608, "%s :Invalid flood parameter", channel->name.c_str());
return MODEACTION_DENY;
}
floodsettings* f = ext.get(channel);
if ((f) && (nlines == f->lines) && (nsecs == f->secs) && (ban == f->ban))
// mode params match
return MODEACTION_DENY;
ext.set(channel, new floodsettings(ban, nsecs, nlines));
parameter = std::string(ban ? "*" : "") + ConvToStr(nlines) + ":" + ConvToStr(nsecs);
return MODEACTION_ALLOW;
}
else
{
if (!channel->IsModeSet(this))
return MODEACTION_DENY;
ext.unset(channel);
return MODEACTION_ALLOW;
}
}
CmdResult Handle(const std::vector<std::string> ¶meters, User *user)
{
if (!user->server->IsULine())
{
// Ulines only
return CMD_FAILURE;
}
Channel* chan = ServerInstance->FindChan(parameters[0]);
if (!chan)
return CMD_FAILURE;
if (parameters.size() == 4)
{
// 4 parameter version, set all topic data on the channel to the ones given in the parameters
time_t topicts = ConvToInt(parameters[1]);
if (!topicts)
{
ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Received SVSTOPIC with a 0 topicts, dropped.");
return CMD_INVALID;
}
std::string newtopic;
newtopic.assign(parameters[3], 0, ServerInstance->Config->Limits.MaxTopic);
bool topics_differ = (chan->topic != newtopic);
if ((topics_differ) || (chan->topicset != topicts) || (chan->setby != parameters[2]))
{
// Update when any parameter differs
chan->topicset = topicts;
chan->setby.assign(parameters[2], 0, 127);
chan->topic = newtopic;
// Send TOPIC to clients only if the actual topic has changed, be silent otherwise
if (topics_differ)
chan->WriteChannel(user, "TOPIC %s :%s", chan->name.c_str(), chan->topic.c_str());
}
}
else
{
// 1 parameter version, nuke the topic
bool topic_empty = chan->topic.empty();
if (!topic_empty || !chan->setby.empty())
{
chan->topicset = 0;
chan->setby.clear();
chan->topic.clear();
if (!topic_empty)
chan->WriteChannel(user, "TOPIC %s :", chan->name.c_str());
}
}
return CMD_SUCCESS;
}
void OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& excepts)
{
if (memb->chan->IsModeSet(&kr) && (source != memb->user))
{
delaylist* dl = kr.ext.get(memb->chan);
if (!dl)
{
dl = new delaylist;
kr.ext.set(memb->chan, dl);
}
(*dl)[memb->user] = ServerInstance->Time() + ConvToInt(memb->chan->GetModeParameter(&kr));
}
}
ModeAction OnModeChange(User* source, User* dest, Channel* chan, std::string& parameter, bool adding)
{
if (adding)
{
std::string::size_type colon = parameter.find(':');
if (colon == std::string::npos || parameter.find('-') != std::string::npos)
{
source->WriteNumeric(608, "%s %s :Invalid join/part spam parameter", source->nick.c_str(), chan->name.c_str());
return MODEACTION_DENY;
}
unsigned int ncycles = ConvToInt(parameter.substr(0, colon));
unsigned int nsecs = ConvToInt(parameter.substr(colon+1));
if (ncycles < 2 || nsecs < 1)
{
source->WriteNumeric(608, "%s %s :Invalid join/part spam parameter", source->nick.c_str(), chan->name.c_str());
return MODEACTION_DENY;
}
joinpartspamsettings* jpss = ext.get(chan);
if (jpss && ncycles == jpss->cycles && nsecs == jpss->secs)
return MODEACTION_DENY;
ext.set(chan, new joinpartspamsettings(ncycles, nsecs));
parameter = ConvToStr(ncycles) + ":" + ConvToStr(nsecs);
chan->SetModeParam(GetModeChar(), parameter);
return MODEACTION_ALLOW;
}
else
{
if (!chan->IsModeSet(GetModeChar()))
return MODEACTION_DENY;
ext.unset(chan);
chan->SetModeParam(GetModeChar(), "");
return MODEACTION_ALLOW;
}
}
CmdResult CommandMetadata::Handle(const std::vector<std::string>& params, User *srcuser)
{
if (params[0] == "*")
{
std::string value = params.size() < 3 ? "" : params[2];
FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(NULL,params[1],value));
return CMD_SUCCESS;
}
if (params[0][0] == '#')
{
// Channel METADATA has an additional parameter: the channel TS
// :22D METADATA #channel 12345 extname :extdata
if (params.size() < 3)
return CMD_INVALID;
Channel* c = ServerInstance->FindChan(params[0]);
if (!c)
return CMD_FAILURE;
time_t ChanTS = ConvToInt(params[1]);
if (!ChanTS)
return CMD_INVALID;
if (c->age < ChanTS)
// Their TS is newer than ours, discard this command and do not propagate
return CMD_FAILURE;
std::string value = params.size() < 4 ? "" : params[3];
ExtensionItem* item = ServerInstance->Extensions.GetItem(params[2]);
if (item)
item->unserialize(FORMAT_NETWORK, c, value);
FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(c,params[2],value));
}
else
{
User* u = ServerInstance->FindUUID(params[0]);
if ((u) && (!IS_SERVER(u)))
{
ExtensionItem* item = ServerInstance->Extensions.GetItem(params[1]);
std::string value = params.size() < 3 ? "" : params[2];
if (item)
item->unserialize(FORMAT_NETWORK, u, value);
FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(u,params[1],value));
}
}
return CMD_SUCCESS;
}
CmdResult CommandWhois::HandleRemote(const std::vector<std::string>& parameters, RemoteUser* target)
{
if (parameters.size() < 2)
return CMD_FAILURE;
User* user = ServerInstance->FindUUID(parameters[0]);
if (!user)
return CMD_FAILURE;
unsigned long idle = ConvToInt(parameters.back());
DoWhois(user, target, target->signon, idle);
return CMD_SUCCESS;
}
PBKDF2Hash(const std::string& data)
{
irc::sepstream ss(data, ':');
std::string tok;
ss.GetToken(tok);
this->iterations = ConvToInt(tok);
ss.GetToken(tok);
this->hash = Base64ToBin(tok);
ss.GetToken(tok);
this->salt = Base64ToBin(tok);
this->length = this->hash.length();
}
ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string ¶meter, bool adding)
{
if (adding)
{
std::string::size_type colon = parameter.find(':');
if (colon == std::string::npos)
return MODEACTION_DENY;
std::string duration = parameter.substr(colon+1);
if ((IS_LOCAL(source)) && ((duration.length() > 10) || (!IsValidDuration(duration))))
return MODEACTION_DENY;
unsigned int len = ConvToInt(parameter.substr(0, colon));
int time = InspIRCd::Duration(duration);
if (len == 0 || time < 0)
return MODEACTION_DENY;
if (len > maxlines && IS_LOCAL(source))
return MODEACTION_DENY;
if (len > maxlines)
len = maxlines;
if (parameter == channel->GetModeParameter(this))
return MODEACTION_DENY;
HistoryList* history = ext.get(channel);
if (history)
{
// Shrink the list if the new line number limit is lower than the old one
if (len < history->lines.size())
history->lines.erase(history->lines.begin(), history->lines.begin() + (history->lines.size() - len));
history->maxlen = len;
history->maxtime = time;
}
else
{
ext.set(channel, new HistoryList(len, time));
}
}
else
{
if (!channel->IsModeSet(this))
return MODEACTION_DENY;
ext.unset(channel);
}
return MODEACTION_ALLOW;
}
irc::sockets::cidr_mask::cidr_mask(const std::string& mask)
{
std::string::size_type bits_chars = mask.rfind('/');
irc::sockets::sockaddrs sa;
if (bits_chars == std::string::npos)
{
irc::sockets::aptosa(mask, 0, sa);
sa2cidr(*this, sa, 128);
}
else
{
int range = ConvToInt(mask.substr(bits_chars + 1));
irc::sockets::aptosa(mask.substr(0, bits_chars), 0, sa);
sa2cidr(*this, sa, range);
}
}
CmdResult CommandNum::HandleServer(TreeServer* server, std::vector<std::string>& params)
{
User* const target = ServerInstance->FindUUID(params[1]);
if (!target)
return CMD_FAILURE;
LocalUser* const localtarget = IS_LOCAL(target);
if (!localtarget)
return CMD_SUCCESS;
Numeric::Numeric numeric(ConvToInt(params[2]));
// Passing NULL is ok, in that case the numeric source becomes this server
numeric.SetServer(Utils->FindServerID(params[0]));
numeric.GetParams().insert(numeric.GetParams().end(), params.begin()+3, params.end());
localtarget->WriteNumeric(numeric);
return CMD_SUCCESS;
}
CmdResult CommandAway::Handle(User* u, std::vector<std::string>& params)
{
if (IS_SERVER(u))
return CMD_INVALID;
if (params.size())
{
FOREACH_MOD(OnSetAway, (u, params[params.size() - 1]));
if (params.size() > 1)
u->awaytime = ConvToInt(params[0]);
else
u->awaytime = ServerInstance->Time();
u->awaymsg = params[params.size() - 1];
}
else
{
FOREACH_MOD(OnSetAway, (u, ""));
u->awaymsg.clear();
}
return CMD_SUCCESS;
}
CmdResult CommandIJoin::HandleRemote(RemoteUser* user, std::vector<std::string>& params)
{
Channel* chan = ServerInstance->FindChan(params[0]);
if (!chan)
{
// Desync detected, recover
// Ignore the join and send RESYNC, this will result in the remote server sending all channel data to us
ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Received IJOIN for non-existant channel: " + params[0]);
CmdBuilder("RESYNC").push(params[0]).Unicast(user);
return CMD_FAILURE;
}
bool apply_modes;
if (params.size() > 1)
{
time_t RemoteTS = ConvToInt(params[1]);
if (!RemoteTS)
{
ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Invalid TS in IJOIN: " + params[1]);
return CMD_INVALID;
}
if (RemoteTS < chan->age)
{
ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Attempted to lower TS via IJOIN. Channel=" + params[0] + " RemoteTS=" + params[1] + " LocalTS=" + ConvToStr(chan->age));
return CMD_INVALID;
}
apply_modes = ((params.size() > 2) && (RemoteTS == chan->age));
}
else
apply_modes = false;
chan->ForceJoin(user, apply_modes ? ¶ms[2] : NULL);
return CMD_SUCCESS;
}
CmdResult CommandUID::HandleServer(TreeServer* remoteserver, std::vector<std::string>& params)
{
/** 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];
/* Is this a valid UID, and not misrouted? */
if (params[0].length() != UIDGenerator::UUID_LENGTH || params[0].substr(0, 3) != remoteserver->GetID())
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;
/* check for collision */
user_hash::iterator iter = ServerInstance->Users->clientlist->find(params[2]);
if (iter != ServerInstance->Users->clientlist->end())
{
/*
* Nick collision.
*/
int collide = Utils->DoCollision(iter->second, remoteserver, age_t, params[5], params[6], params[0]);
ServerInstance->Logs->Log(MODNAME, 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
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);
}
catch (...)
{
ServerInstance->Logs->Log(MODNAME, 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;
for (std::string::const_iterator v = modestr.begin(); v != modestr.end(); ++v)
{
// Accept more '+' chars, for now
if (*v == '+')
continue;
/* 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(MODNAME, 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(mh, true);
}
_new->SetClientIP(params[6].c_str());
ServerInstance->Users->AddGlobalClone(_new);
remoteserver->UserCount++;
bool dosend = true;
if ((Utils->quiet_bursts && remoteserver->bursting) || _new->server->IsSilentULine())
dosend = false;
if (dosend)
ServerInstance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s (%s) [%s]", remoteserver->GetName().c_str(), _new->GetFullRealHost().c_str(), _new->GetIPString().c_str(), _new->fullname.c_str());
FOREACH_MOD(OnPostConnect, (_new));
return CMD_SUCCESS;
}
/** FJOIN, almost identical to TS6 SJOIN, except for nicklist handling. */
CmdResult CommandFJoin::Handle(const std::vector<std::string>& params, User *srcuser)
{
SpanningTreeUtilities* Utils = ((ModuleSpanningTree*)(Module*)creator)->Utils;
/* 1.1+ FJOIN works as follows:
*
* Each FJOIN is sent along with a timestamp, and the side with the lowest
* timestamp 'wins'. From this point on we will refer to this side as the
* winner. The side with the higher timestamp loses, from this point on we
* will call this side the loser or losing side. This should be familiar to
* anyone who's dealt with dreamforge or TS6 before.
*
* When two sides of a split heal and this occurs, the following things
* will happen:
*
* If the timestamps are exactly equal, both sides merge their privilages
* and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
* re-created during a split, this is safe to do.
*
* If the timestamps are NOT equal, the losing side removes all of its
* modes from the channel, before introducing new users into the channel
* which are listed in the FJOIN command's parameters. The losing side then
* LOWERS its timestamp value of the channel to match that of the winning
* side, and the modes of the users of the winning side are merged in with
* the losing side.
*
* The winning side on the other hand will ignore all user modes from the
* losing side, so only its own modes get applied. Life is simple for those
* who succeed at internets. :-)
*
* Syntax:
* :<sid> FJOIN <chan> <TS> <modes> :[[modes,]<uuid> [[modes,]<uuid> ... ]]
* The last parameter is a list consisting of zero or more (modelist, uuid)
* pairs (permanent channels may have zero users). The mode list for each
* user is a concatenation of the mode letters the user has on the channel
* (e.g.: "ov" if the user is opped and voiced). The order of the mode letters
* are not important but if a server ecounters an unknown mode letter, it will
* drop the link to avoid desync.
*
* InspIRCd 2.0 and older required a comma before the uuid even if the user
* had no prefix modes on the channel, InspIRCd 2.2 and later does not require
* a comma in this case anymore.
*
*/
time_t TS = ConvToInt(params[1]);
if (!TS)
{
ServerInstance->Logs->Log("m_spanningtree",LOG_DEFAULT,"*** BUG? *** TS of 0 sent to FJOIN. Are some services authors smoking craq, or is it 1970 again?. Dropped.");
ServerInstance->SNO->WriteToSnoMask('d', "WARNING: The server %s is sending FJOIN with a TS of zero. Total craq. Command was dropped.", srcuser->server.c_str());
return CMD_INVALID;
}
const std::string& channel = params[0];
Channel* chan = ServerInstance->FindChan(channel);
bool apply_other_sides_modes = true;
if (!chan)
{
chan = new Channel(channel, TS);
}
else
{
time_t ourTS = chan->age;
if (TS != ourTS)
{
ServerInstance->SNO->WriteToSnoMask('d', "Merge FJOIN received for %s, ourTS: %lu, TS: %lu, difference: %lu",
chan->name.c_str(), (unsigned long)ourTS, (unsigned long)TS, (unsigned long)(ourTS - TS));
/* If our TS is less than theirs, we dont accept their modes */
if (ourTS < TS)
{
apply_other_sides_modes = false;
}
else if (ourTS > TS)
{
/* Our TS greater than theirs, clear all our modes from the channel, accept theirs. */
if (Utils->AnnounceTSChange)
chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :TS for %s changed from %lu to %lu", chan->name.c_str(), channel.c_str(), (unsigned long) ourTS, (unsigned long) TS);
// while the name is equal in case-insensitive compare, it might differ in case; use the remote version
chan->name = channel;
chan->age = TS;
chan->ClearInvites();
CommandFJoin::RemoveStatus(chan);
// XXX: If the channel does not exist in the chan hash at this point, create it so the remote modes can be applied on it.
// This happens to 0-user permanent channels on the losing side, because those are removed (from the chan hash, then
// deleted later) as soon as the permchan mode is removed from them.
if (ServerInstance->FindChan(channel) == NULL)
{
chan = new Channel(channel, TS);
}
}
}
}
/* First up, apply their channel modes if they won the TS war */
if (apply_other_sides_modes)
{
std::vector<std::string> modelist;
modelist.push_back(channel);
/* Remember, params[params.size() - 1] is userlist, and we don't want to apply *that* */
modelist.insert(modelist.end(), params.begin()+2, params.end()-1);
ServerInstance->SendMode(modelist, srcuser);
}
irc::modestacker modestack(true);
TreeSocket* src_socket = Utils->FindServer(srcuser->server)->GetRoute()->GetSocket();
/* Now, process every 'modes,uuid' pair */
irc::tokenstream users(*params.rbegin());
std::string item;
irc::modestacker* modestackptr = (apply_other_sides_modes ? &modestack : NULL);
while (users.GetToken(item))
{
if (!ProcessModeUUIDPair(item, src_socket, chan, modestackptr))
return CMD_INVALID;
}
/* Flush mode stacker if we lost the FJOIN or had equal TS */
if (apply_other_sides_modes)
CommandFJoin::ApplyModeStack(srcuser, chan, modestack);
return CMD_SUCCESS;
}
/** FTOPIC command */
CmdResult CommandFTopic::Handle(User* user, std::vector<std::string>& params)
{
Channel* c = ServerInstance->FindChan(params[0]);
if (!c)
return CMD_FAILURE;
time_t ChanTS = ConvToInt(params[1]);
if (!ChanTS)
return CMD_INVALID;
if (c->age < ChanTS)
// Our channel TS is older, nothing to do
return CMD_FAILURE;
time_t ts = ConvToInt(params[2]);
if (!ts)
return CMD_INVALID;
// Channel::topicset is initialized to 0 on channel creation, so their ts will always win if we never had a topic
if (ts < c->topicset)
return CMD_FAILURE;
// The topic text is always the last parameter
const std::string& newtopic = params.back();
// If there is a setter in the message use that, otherwise use the message source
const std::string& setter = ((params.size() > 4) ? params[3] : (ServerInstance->Config->FullHostInTopic ? user->GetFullHost() : user->nick));
/*
* If the topics were updated at the exact same second, accept
* the remote only when it's "bigger" than ours as defined by
* string comparision, so non-empty topics always overridde
* empty topics if their timestamps are equal
*
* Similarly, if the topic texts are equal too, keep one topic
* setter and discard the other
*/
if (ts == c->topicset)
{
// Discard if their topic text is "smaller"
if (c->topic > newtopic)
return CMD_FAILURE;
// If the texts are equal in addition to the timestamps, decide which setter to keep
if ((c->topic == newtopic) && (c->setby >= setter))
return CMD_FAILURE;
}
if (c->topic != newtopic)
{
// Update topic only when it differs from current topic
c->topic.assign(newtopic, 0, ServerInstance->Config->Limits.MaxTopic);
c->WriteChannel(user, "TOPIC %s :%s", c->name.c_str(), c->topic.c_str());
}
// Update setter and settime
c->setby.assign(setter, 0, 128);
c->topicset = ts;
FOREACH_MOD(OnPostTopicChange, (user, c, c->topic));
return CMD_SUCCESS;
}
CmdResult Handle (const std::vector<std::string> ¶meters, User *user)
{
int n_done = 0;
reason = (parameters.size() < 4) ? "Please use this server/port instead" : parameters[3];
bool redirect_all_immediately = false;
redirect_new_users = true;
bool direction = true;
std::string n_done_s;
/* No parameters: jumpserver disabled */
if (!parameters.size())
{
if (port)
user->WriteNotice("*** Disabled jumpserver (previously set to '" + redirect_to + ":" + ConvToStr(port) + "')");
else
user->WriteNotice("*** Jumpserver was not enabled.");
port = 0;
sslport = 0;
redirect_to.clear();
return CMD_SUCCESS;
}
port = 0;
redirect_to.clear();
if (parameters.size() >= 3)
{
for (std::string::const_iterator n = parameters[2].begin(); n != parameters[2].end(); ++n)
{
switch (*n)
{
case '+':
direction = true;
break;
case '-':
direction = false;
break;
case 'a':
redirect_all_immediately = direction;
break;
case 'n':
redirect_new_users = direction;
break;
default:
user->WriteNotice("*** Invalid JUMPSERVER flag: " + ConvToStr(*n));
return CMD_FAILURE;
break;
}
}
size_t delimpos = parameters[1].find(':');
port = ConvToInt(parameters[1].substr(0, delimpos ? delimpos : std::string::npos));
sslport = (delimpos == std::string::npos ? 0 : ConvToInt(parameters[1].substr(delimpos + 1)));
if (parameters[1].find_first_not_of("0123456789:") != std::string::npos
|| parameters[1].rfind(':') != delimpos
|| port > 65535 || sslport > 65535)
{
user->WriteNotice("*** Invalid port number");
return CMD_FAILURE;
}
if (redirect_all_immediately)
{
/* Redirect everyone but the oper sending the command */
for (LocalUserList::const_iterator i = ServerInstance->Users->local_users.begin(); i != ServerInstance->Users->local_users.end(); ++i)
{
LocalUser* t = *i;
if (!t->IsOper())
{
t->WriteNumeric(10, "%s %s %d :Please use this Server/Port instead", t->nick.c_str(), parameters[0].c_str(), GetPort(t));
ServerInstance->Users->QuitUser(t, reason);
n_done++;
}
}
if (n_done)
{
n_done_s = ConvToStr(n_done);
}
}
if (redirect_new_users)
redirect_to = parameters[0];
user->WriteNotice("*** Set jumpserver to server '" + parameters[0] + "' port '" + (port ? ConvToStr(port) : "Auto") + ", SSL " + (sslport ? ConvToStr(sslport) : "Auto") + "', flags '+" +
(redirect_all_immediately ? "a" : "") + (redirect_new_users ? "n'" : "'") +
(n_done ? " (" + n_done_s + "user(s) redirected): " : ": ") + reason);
}
return CMD_SUCCESS;
}
void TreeSocket::ProcessLine(std::string &line)
{
std::string prefix;
std::string command;
parameterlist params;
ServerInstance->Logs->Log(MODNAME, LOG_RAWIO, "S[%d] I %s", this->GetFd(), line.c_str());
Split(line, prefix, command, params);
if (command.empty())
return;
switch (this->LinkState)
{
case WAIT_AUTH_1:
/*
* State WAIT_AUTH_1:
* Waiting for SERVER command from remote server. Server initiating
* the connection sends the first SERVER command, listening server
* replies with theirs if its happy, then if the initiator is happy,
* it starts to send its net sync, which starts the merge, otherwise
* it sends an ERROR.
*/
if (command == "PASS")
{
/*
* Ignore this silently. Some services packages insist on sending PASS, even
* when it is not required (i.e. by us). We have to ignore this here, otherwise
* as it's an unknown command (effectively), it will cause the connection to be
* closed, which probably isn't what people want. -- w00t
*/
}
else if (command == "SERVER")
{
this->Inbound_Server(params);
}
else if (command == "ERROR")
{
this->Error(params);
}
else if (command == "USER")
{
this->SendError("Client connections to this port are prohibited.");
}
else if (command == "CAPAB")
{
this->Capab(params);
}
else
{
this->SendError("Invalid command in negotiation phase: " + command);
}
break;
case WAIT_AUTH_2:
/*
* State WAIT_AUTH_2:
* We have sent SERVER to the other side of the connection. Now we're waiting for them to start BURST.
* The other option at this stage of things, of course, is for them to close our connection thanks
* to invalid credentials.. -- w
*/
if (command == "SERVER")
{
/*
* Connection is either attempting to re-auth itself (stupid) or sending netburst without sending BURST.
* Both of these aren't allowable, so block them here. -- w
*/
this->SendError("You may not re-authenticate or commence netburst without sending BURST.");
}
else if (command == "BURST")
{
if (params.size())
{
time_t them = ConvToInt(params[0]);
time_t delta = them - ServerInstance->Time();
if ((delta < -600) || (delta > 600))
{
ServerInstance->SNO->WriteGlobalSno('l',"\2ERROR\2: Your clocks are out by %d seconds (this is more than five minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs((long)delta));
SendError("Your clocks are out by "+ConvToStr(abs((long)delta))+" seconds (this is more than five minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
return;
}
else if ((delta < -30) || (delta > 30))
{
ServerInstance->SNO->WriteGlobalSno('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs((long)delta));
}
}
// Check for duplicate server name/sid again, it's possible that a new
// server was introduced while we were waiting for them to send BURST.
// (we do not reserve their server name/sid when they send SERVER, we do it now)
if (!CheckDuplicate(capab->name, capab->sid))
return;
this->LinkState = CONNECTED;
Utils->timeoutlist.erase(this);
linkID = capab->name;
MyRoot = new TreeServer(capab->name, capab->description, capab->sid, Utils->TreeRoot, this, capab->hidden);
Utils->TreeRoot->AddChild(MyRoot);
MyRoot->bursting = true;
this->DoBurst(MyRoot);
parameterlist sparams;
sparams.push_back(MyRoot->GetName());
sparams.push_back("*");
sparams.push_back("0");
sparams.push_back(MyRoot->GetID());
sparams.push_back(":" + MyRoot->GetDesc());
Utils->DoOneToAllButSender(ServerInstance->Config->GetSID(), "SERVER", sparams, MyRoot);
Utils->DoOneToAllButSender(MyRoot->GetID(), "BURST", params, MyRoot);
}
else if (command == "ERROR")
{
this->Error(params);
}
else if (command == "CAPAB")
{
this->Capab(params);
}
break;
case CONNECTING:
/*
* State CONNECTING:
* We're connecting (OUTGOING) to another server. They are in state WAIT_AUTH_1 until they verify
* our credentials, when they proceed into WAIT_AUTH_2 and send SERVER to us. We then send BURST
* + our netburst, which will put them into CONNECTED state. -- w
*/
if (command == "SERVER")
{
// Our credentials have been accepted, send netburst. (this puts US into the CONNECTED state)
this->Outbound_Reply_Server(params);
}
else if (command == "ERROR")
{
this->Error(params);
}
else if (command == "CAPAB")
{
this->Capab(params);
}
break;
case CONNECTED:
/*
* State CONNECTED:
* Credentials have been exchanged, we've gotten their 'BURST' (or sent ours).
* Anything from here on should be accepted a little more reasonably.
*/
this->ProcessConnectedLine(prefix, command, params);
break;
case DYING:
break;
}
}
/** Handle /INVITE
*/
CmdResult CommandInvite::Handle (const std::vector<std::string>& parameters, User *user)
{
ModResult MOD_RESULT;
if (parameters.size() == 2 || parameters.size() == 3)
{
User* u;
if (IS_LOCAL(user))
u = ServerInstance->FindNickOnly(parameters[0]);
else
u = ServerInstance->FindNick(parameters[0]);
Channel* c = ServerInstance->FindChan(parameters[1]);
time_t timeout = 0;
if (parameters.size() == 3)
{
if (IS_LOCAL(user))
timeout = ServerInstance->Time() + InspIRCd::Duration(parameters[1]);
else
timeout = ConvToInt(parameters[2]);
}
if ((!c) || (!u) || (u->registered != REG_ALL))
{
user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(), c ? parameters[0].c_str() : parameters[1].c_str());
return CMD_FAILURE;
}
if ((IS_LOCAL(user)) && (!c->HasUser(user)))
{
user->WriteNumeric(ERR_NOTONCHANNEL, "%s %s :You're not on that channel!",user->nick.c_str(), c->name.c_str());
return CMD_FAILURE;
}
if (c->HasUser(u))
{
user->WriteNumeric(ERR_USERONCHANNEL, "%s %s %s :is already on channel",user->nick.c_str(),u->nick.c_str(),c->name.c_str());
return CMD_FAILURE;
}
FIRST_MOD_RESULT(OnUserPreInvite, MOD_RESULT, (user,u,c,timeout));
if (MOD_RESULT == MOD_RES_DENY)
{
return CMD_FAILURE;
}
else if (MOD_RESULT == MOD_RES_PASSTHRU)
{
if (IS_LOCAL(user))
{
unsigned int rank = c->GetPrefixValue(user);
if (rank < HALFOP_VALUE)
{
// Check whether halfop mode is available and phrase error message accordingly
ModeHandler* mh = ServerInstance->Modes->FindMode('h', MODETYPE_CHANNEL);
user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You must be a channel %soperator",
user->nick.c_str(), c->name.c_str(), (mh && mh->name == "halfop" ? "half-" : ""));
return CMD_FAILURE;
}
}
}
if (IS_LOCAL(u))
{
Invitation::Create(c, IS_LOCAL(u), timeout);
u->WriteFrom(user,"INVITE %s :%s",u->nick.c_str(),c->name.c_str());
}
if (IS_LOCAL(user))
user->WriteNumeric(RPL_INVITING, "%s %s %s",user->nick.c_str(),u->nick.c_str(),c->name.c_str());
if (ServerInstance->Config->AnnounceInvites != ServerConfig::INVITE_ANNOUNCE_NONE)
{
char prefix;
switch (ServerInstance->Config->AnnounceInvites)
{
case ServerConfig::INVITE_ANNOUNCE_OPS:
{
prefix = '@';
break;
}
case ServerConfig::INVITE_ANNOUNCE_DYNAMIC:
{
PrefixMode* mh = ServerInstance->Modes->FindPrefixMode('h');
prefix = (mh && mh->name == "halfop" ? mh->GetPrefix() : '@');
break;
}
default:
{
prefix = 0;
break;
}
}
c->WriteAllExceptSender(user, true, prefix, "NOTICE %s :*** %s invited %s into the channel", c->name.c_str(), user->nick.c_str(), u->nick.c_str());
}
FOREACH_MOD(OnUserInvite, (user,u,c,timeout));
}
else if (IS_LOCAL(user))
{
// pinched from ircu - invite with not enough parameters shows channels
// youve been invited to but haven't joined yet.
InviteList& il = IS_LOCAL(user)->GetInviteList();
for (InviteList::const_iterator i = il.begin(); i != il.end(); ++i)
{
user->WriteNumeric(RPL_INVITELIST, "%s :%s",user->nick.c_str(), (*i)->chan->name.c_str());
}
user->WriteNumeric(RPL_ENDOFINVITELIST, "%s :End of INVITE list",user->nick.c_str());
}
return CMD_SUCCESS;
}