void Channel::SetDefaultModes()
{
ServerInstance->Logs->Log("CHANNELS", LOG_DEBUG, "SetDefaultModes %s",
ServerInstance->Config->DefaultModes.c_str());
irc::spacesepstream list(ServerInstance->Config->DefaultModes);
std::string modeseq;
std::string parameter;
list.GetToken(modeseq);
for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
{
ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
if (mode)
{
if (mode->IsPrefixMode())
continue;
if (mode->GetNumParams(true))
{
list.GetToken(parameter);
// If the parameter begins with a ':' then it's invalid
if (parameter.c_str()[0] == ':')
continue;
}
else
parameter.clear();
if ((mode->GetNumParams(true)) && (parameter.empty()))
continue;
mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, this, parameter, true);
}
}
}
void ModeParser::ModeParamsToChangeList(User* user, ModeType type, const std::vector<std::string>& parameters, Modes::ChangeList& changelist, unsigned int beginindex, unsigned int endindex)
{
if (endindex > parameters.size())
endindex = parameters.size();
const std::string& mode_sequence = parameters[beginindex];
bool adding = true;
unsigned int param_at = beginindex+1;
for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
{
unsigned char modechar = *letter;
if (modechar == '+' || modechar == '-')
{
adding = (modechar == '+');
continue;
}
ModeHandler *mh = this->FindMode(modechar, type);
if (!mh)
{
/* No mode handler? Unknown mode character then. */
user->WriteNumeric(type == MODETYPE_CHANNEL ? ERR_UNKNOWNMODE : ERR_UNKNOWNSNOMASK, "%c :is unknown mode char to me", modechar);
continue;
}
std::string parameter;
if (mh->GetNumParams(adding) && param_at < endindex)
parameter = parameters[param_at++];
changelist.push(mh, adding, parameter);
}
}
void Channel::SetDefaultModes()
{
ServerInstance->Logs->Log("CHANNELS", LOG_DEBUG, "SetDefaultModes %s",
ServerInstance->Config->DefaultModes.c_str());
irc::spacesepstream list(ServerInstance->Config->DefaultModes);
std::string modeseq;
std::string parameter;
list.GetToken(modeseq);
for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
{
ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
if (mode)
{
if (mode->GetPrefixRank())
continue;
if (mode->GetNumParams(true))
list.GetToken(parameter);
else
parameter.clear();
mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, this, parameter, true);
}
}
}
std::string ModeParser::GiveModeList(ModeType mt)
{
std::string type1; /* Listmodes EXCEPT those with a prefix */
std::string type2; /* Modes that take a param when adding or removing */
std::string type3; /* Modes that only take a param when adding */
std::string type4; /* Modes that dont take a param */
for (unsigned char mode = 'A'; mode <= 'z'; mode++)
{
ModeHandler* mh = modehandlers[mt][mode-65];
/* One parameter when adding */
if (mh)
{
if (mh->GetNumParams(true))
{
PrefixMode* pm = mh->IsPrefixMode();
if ((mh->IsListMode()) && ((!pm) || (pm->GetPrefix() == 0)))
{
type1 += mh->GetModeChar();
}
else
{
/* ... and one parameter when removing */
if (mh->GetNumParams(false))
{
/* But not a list mode */
if (!pm)
{
type2 += mh->GetModeChar();
}
}
else
{
/* No parameters when removing */
type3 += mh->GetModeChar();
}
}
}
else
{
type4 += mh->GetModeChar();
}
}
}
return type1 + "," + type2 + "," + type3 + "," + type4;
}
std::string ModeParser::CreateModeList(ModeType mt, bool needparam)
{
std::string modestr;
for (unsigned char mode = 'A'; mode <= 'z'; mode++)
{
ModeHandler* mh = modehandlers[mt][mode-65];
if ((mh) && ((!needparam) || (mh->GetNumParams(true))))
modestr.push_back(mode);
}
return modestr;
}
static void DisplayList(User* user, Channel* channel)
{
std::stringstream items;
for(char letter = 'A'; letter <= 'z'; letter++)
{
ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_CHANNEL);
if (!mh || mh->IsListMode())
continue;
if (!channel->IsModeSet(mh))
continue;
items << " +" << mh->name;
if (mh->GetNumParams(true))
items << " " << channel->GetModeParameter(mh);
}
const std::string line = ":" + ServerInstance->Config->ServerName + " 961 " + user->nick + " " + channel->name;
user->SendText(line, items);
user->WriteNumeric(960, "%s %s :End of mode list", user->nick.c_str(), channel->name.c_str());
}
const char* User::FormatModes(bool showparameters)
{
static std::string data;
std::string params;
data.clear();
for (unsigned char n = 0; n < 64; n++)
{
ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
if (mh && IsModeSet(mh))
{
data.push_back(n + 65);
if (showparameters && mh->GetNumParams(true))
{
std::string p = mh->GetUserParameter(this);
if (p.length())
params.append(" ").append(p);
}
}
}
data += params;
return data.c_str();
}
CmdResult Handle(const std::vector<std::string> ¶meters, User *src)
{
if (parameters.size() == 1)
{
Channel* chan = ServerInstance->FindChan(parameters[0]);
if (chan)
DisplayList(src, chan);
return CMD_SUCCESS;
}
unsigned int i = 1;
std::vector<std::string> modes;
modes.push_back(parameters[0]);
modes.push_back("");
while (i < parameters.size())
{
std::string prop = parameters[i++];
bool plus = prop[0] != '-';
if (prop[0] == '+' || prop[0] == '-')
prop.erase(prop.begin());
for(char letter = 'A'; letter <= 'z'; letter++)
{
ModeHandler* mh = ServerInstance->Modes->FindMode(letter, MODETYPE_CHANNEL);
if (mh && mh->name == prop)
{
modes[1].append((plus ? "+" : "-") + std::string(1, letter));
if (mh->GetNumParams(plus))
{
if (i != parameters.size())
modes.push_back(parameters[i++]);
}
}
}
}
ServerInstance->Modes->Process(modes, src);
return CMD_SUCCESS;
}
const char* User::FormatModes(bool showparameters)
{
static char data[MAXBUF];
std::string params;
int offset = 0;
for (unsigned char n = 0; n < 64; n++)
{
if (modes[n])
{
data[offset++] = n + 65;
ModeHandler* mh = ServerInstance->Modes->FindMode(n + 65, MODETYPE_USER);
if (showparameters && mh && mh->GetNumParams(true))
{
std::string p = mh->GetUserParameter(this);
if (p.length())
params.append(" ").append(p);
}
}
}
data[offset] = 0;
strlcat(data, params.c_str(), MAXBUF);
return data;
}
void LoadDatabase()
{
/*
* Process config-defined list of permanent channels.
* -- w00t
*/
ConfigTagList permchannels = ServerInstance->Config->ConfTags("permchannels");
for (ConfigIter i = permchannels.first; i != permchannels.second; ++i)
{
ConfigTag* tag = i->second;
std::string channel = tag->getString("channel");
std::string modes = tag->getString("modes");
if ((channel.empty()) || (channel.length() > ServerInstance->Config->Limits.ChanMax))
{
ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Ignoring permchannels tag with empty or too long channel name (\"" + channel + "\")");
continue;
}
Channel *c = ServerInstance->FindChan(channel);
if (!c)
{
time_t TS = tag->getInt("ts", ServerInstance->Time(), 1);
c = new Channel(channel, TS);
unsigned int topicset = tag->getInt("topicts");
c->topic = tag->getString("topic");
if ((topicset != 0) || (!c->topic.empty()))
{
if (topicset == 0)
topicset = ServerInstance->Time();
c->topicset = topicset;
c->setby = tag->getString("topicsetby");
if (c->setby.empty())
c->setby = ServerInstance->Config->ServerName;
}
ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Added %s with topic %s", channel.c_str(), c->topic.c_str());
if (modes.empty())
continue;
irc::spacesepstream list(modes);
std::string modeseq;
std::string par;
list.GetToken(modeseq);
// XXX bleh, should we pass this to the mode parser instead? ugly. --w00t
for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
{
ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
if (mode)
{
if (mode->GetNumParams(true))
list.GetToken(par);
else
par.clear();
mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, c, par, true);
}
}
}
}
}
void ModeParser::Process(const std::vector<std::string>& parameters, User* user, ModeProcessFlag flags)
{
std::string target = parameters[0];
Channel* targetchannel = ServerInstance->FindChan(target);
User* targetuser = ServerInstance->FindNick(target);
ModeType type = targetchannel ? MODETYPE_CHANNEL : MODETYPE_USER;
LastParse.clear();
LastParseParams.clear();
LastParseTranslate.clear();
if ((!targetchannel) && ((!targetuser) || (IS_SERVER(targetuser))))
{
user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel",user->nick.c_str(),target.c_str());
return;
}
if (parameters.size() == 1)
{
this->DisplayCurrentModes(user, targetuser, targetchannel, target.c_str());
return;
}
ModResult MOD_RESULT;
FIRST_MOD_RESULT(OnPreMode, MOD_RESULT, (user, targetuser, targetchannel, parameters));
bool SkipAccessChecks = false;
if (!IS_LOCAL(user) || ServerInstance->ULine(user->server) || MOD_RESULT == MOD_RES_ALLOW)
SkipAccessChecks = true;
else if (MOD_RESULT == MOD_RES_DENY)
return;
if (targetuser && !SkipAccessChecks && user != targetuser)
{
user->WriteNumeric(ERR_USERSDONTMATCH, "%s :Can't change mode for other users", user->nick.c_str());
return;
}
std::string mode_sequence = parameters[1];
std::string output_mode;
std::ostringstream output_parameters;
LastParseParams.push_back(output_mode);
LastParseTranslate.push_back(TR_TEXT);
bool adding = true;
char output_pm = '\0'; // current output state, '+' or '-'
unsigned int param_at = 2;
for (std::string::const_iterator letter = mode_sequence.begin(); letter != mode_sequence.end(); letter++)
{
unsigned char modechar = *letter;
if (modechar == '+' || modechar == '-')
{
adding = (modechar == '+');
continue;
}
ModeHandler *mh = this->FindMode(modechar, type);
if (!mh)
{
/* No mode handler? Unknown mode character then. */
user->WriteServ("%d %s %c :is unknown mode char to me", type == MODETYPE_CHANNEL ? 472 : 501, user->nick.c_str(), modechar);
continue;
}
std::string parameter;
int pcnt = mh->GetNumParams(adding);
if (pcnt && param_at == parameters.size())
{
/* No parameter, continue to the next mode */
mh->OnParameterMissing(user, targetuser, targetchannel);
continue;
}
else if (pcnt)
{
parameter = parameters[param_at++];
/* Make sure the user isn't trying to slip in an invalid parameter */
if ((parameter.find(':') == 0) || (parameter.rfind(' ') != std::string::npos))
continue;
if ((flags & MODE_MERGE) && targetchannel && targetchannel->IsModeSet(mh) && !mh->IsListMode())
{
std::string ours = targetchannel->GetModeParameter(mh);
if (!mh->ResolveModeConflict(parameter, ours, targetchannel))
/* we won the mode merge, don't apply this mode */
continue;
}
}
ModeAction ma = TryMode(user, targetuser, targetchannel, adding, modechar, parameter, SkipAccessChecks);
if (ma != MODEACTION_ALLOW)
continue;
char needed_pm = adding ? '+' : '-';
if (needed_pm != output_pm)
{
output_pm = needed_pm;
output_mode.append(1, output_pm);
}
output_mode.append(1, modechar);
if (pcnt)
{
output_parameters << " " << parameter;
LastParseParams.push_back(parameter);
LastParseTranslate.push_back(mh->GetTranslateType());
}
if ( (output_mode.length() + output_parameters.str().length() > 450)
|| (output_mode.length() > 100)
|| (LastParseParams.size() > ServerInstance->Config->Limits.MaxModes))
{
/* mode sequence is getting too long */
break;
}
}
LastParseParams[0] = output_mode;
if (!output_mode.empty())
{
LastParse = targetchannel ? targetchannel->name : targetuser->nick;
LastParse.append(" ");
LastParse.append(output_mode);
LastParse.append(output_parameters.str());
if (!(flags & MODE_LOCALONLY))
ServerInstance->PI->SendMode(user, targetuser, targetchannel, LastParseParams, LastParseTranslate);
if (targetchannel)
targetchannel->WriteChannel(user, "MODE " + LastParse);
else
targetuser->WriteFrom(user, "MODE " + LastParse);
FOREACH_MOD(OnMode, (user, targetuser, targetchannel, LastParseParams, LastParseTranslate));
}
else if (targetchannel && parameters.size() == 2)
{
/* Special case for displaying the list for listmodes,
* e.g. MODE #chan b, or MODE #chan +b without a parameter
*/
this->DisplayListModes(user, targetchannel, mode_sequence);
}
}
ModeAction ModeParser::TryMode(User* user, User* targetuser, Channel* chan, bool adding, const unsigned char modechar,
std::string ¶meter, bool SkipACL)
{
ModeType type = chan ? MODETYPE_CHANNEL : MODETYPE_USER;
ModeHandler *mh = FindMode(modechar, type);
int pcnt = mh->GetNumParams(adding);
// crop mode parameter size to 250 characters
if (parameter.length() > 250 && adding)
parameter = parameter.substr(0, 250);
ModResult MOD_RESULT;
FIRST_MOD_RESULT(OnRawMode, MOD_RESULT, (user, chan, modechar, parameter, adding, pcnt));
if (IS_LOCAL(user) && (MOD_RESULT == MOD_RES_DENY))
return MODEACTION_DENY;
if (chan && !SkipACL && (MOD_RESULT != MOD_RES_ALLOW))
{
MOD_RESULT = mh->AccessCheck(user, chan, parameter, adding);
if (MOD_RESULT == MOD_RES_DENY)
return MODEACTION_DENY;
if (MOD_RESULT == MOD_RES_PASSTHRU)
{
unsigned int neededrank = mh->GetLevelRequired();
/* Compare our rank on the channel against the rank of the required prefix,
* allow if >= ours. Because mIRC and xchat throw a tizz if the modes shown
* in NAMES(X) are not in rank order, we know the most powerful mode is listed
* first, so we don't need to iterate, we just look up the first instead.
*/
unsigned int ourrank = chan->GetPrefixValue(user);
if (ourrank < neededrank)
{
PrefixMode* neededmh = NULL;
for(char c='A'; c <= 'z'; c++)
{
PrefixMode* privmh = FindPrefixMode(c);
if (privmh && privmh->GetPrefixRank() >= neededrank)
{
// this mode is sufficient to allow this action
if (!neededmh || privmh->GetPrefixRank() < neededmh->GetPrefixRank())
neededmh = privmh;
}
}
if (neededmh)
user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You must have channel %s access or above to %sset channel mode %c",
user->nick.c_str(), chan->name.c_str(), neededmh->name.c_str(), adding ? "" : "un", modechar);
else
user->WriteNumeric(ERR_CHANOPRIVSNEEDED, "%s %s :You cannot %sset channel mode %c",
user->nick.c_str(), chan->name.c_str(), adding ? "" : "un", modechar);
return MODEACTION_DENY;
}
}
}
// Ask mode watchers whether this mode change is OK
std::pair<ModeWatchIter, ModeWatchIter> itpair = modewatchermap.equal_range(mh->name);
for (ModeWatchIter i = itpair.first; i != itpair.second; ++i)
{
ModeWatcher* mw = i->second;
if (mw->GetModeType() == type)
{
if (!mw->BeforeMode(user, targetuser, chan, parameter, adding))
return MODEACTION_DENY;
// A module whacked the parameter completely, and there was one. Abort.
if (pcnt && parameter.empty())
return MODEACTION_DENY;
}
}
if (IS_LOCAL(user) && !user->IsOper())
{
char* disabled = (type == MODETYPE_CHANNEL) ? ServerInstance->Config->DisabledCModes : ServerInstance->Config->DisabledUModes;
if (disabled[modechar - 'A'])
{
user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - %s mode %c has been locked by the administrator",
user->nick.c_str(), type == MODETYPE_CHANNEL ? "channel" : "user", modechar);
return MODEACTION_DENY;
}
}
if (adding && IS_LOCAL(user) && mh->NeedsOper() && !user->HasModePermission(modechar, type))
{
/* It's an oper only mode, and they don't have access to it. */
if (user->IsOper())
{
user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - Oper type %s does not have access to set %s mode %c",
user->nick.c_str(), user->oper->name.c_str(), type == MODETYPE_CHANNEL ? "channel" : "user", modechar);
}
else
{
user->WriteNumeric(ERR_NOPRIVILEGES, "%s :Permission Denied - Only operators may set %s mode %c",
user->nick.c_str(), type == MODETYPE_CHANNEL ? "channel" : "user", modechar);
}
return MODEACTION_DENY;
}
/* Call the handler for the mode */
ModeAction ma = mh->OnModeChange(user, targetuser, chan, parameter, adding);
if (pcnt && parameter.empty())
return MODEACTION_DENY;
if (ma != MODEACTION_ALLOW)
return ma;
if ((!mh->IsListMode()) && (mh->GetNumParams(true)) && (chan))
chan->SetModeParam(mh, (adding ? parameter : ""));
itpair = modewatchermap.equal_range(mh->name);
for (ModeWatchIter i = itpair.first; i != itpair.second; ++i)
{
ModeWatcher* mw = i->second;
if (mw->GetModeType() == type)
mw->AfterMode(user, targetuser, chan, parameter, adding);
}
return MODEACTION_ALLOW;
}
void LoadDatabase()
{
/*
* Process config-defined list of permanent channels.
* -- w00t
*/
ConfigTagList permchannels = ServerInstance->Config->ConfTags("permchannels");
for (ConfigIter i = permchannels.first; i != permchannels.second; ++i)
{
ConfigTag* tag = i->second;
std::string channel = tag->getString("channel");
std::string topic = tag->getString("topic");
std::string modes = tag->getString("modes");
if (channel.empty())
{
ServerInstance->Logs->Log("m_permchannels", LOG_DEBUG, "Malformed permchannels tag with empty channel name.");
continue;
}
Channel *c = ServerInstance->FindChan(channel);
if (!c)
{
c = new Channel(channel, ServerInstance->Time());
if (!topic.empty())
{
c->SetTopic(ServerInstance->FakeClient, topic, true);
/*
* Due to the way protocol works in 1.2, we need to hack the topic TS in such a way that this
* topic will always win over others.
*
* This is scheduled for (proper) fixing in a later release, and can be removed at a later date.
*/
c->topicset = 42;
}
ServerInstance->Logs->Log("m_permchannels", LOG_DEBUG, "Added %s with topic %s", channel.c_str(), topic.c_str());
if (modes.empty())
continue;
irc::spacesepstream list(modes);
std::string modeseq;
std::string par;
list.GetToken(modeseq);
// XXX bleh, should we pass this to the mode parser instead? ugly. --w00t
for (std::string::iterator n = modeseq.begin(); n != modeseq.end(); ++n)
{
ModeHandler* mode = ServerInstance->Modes->FindMode(*n, MODETYPE_CHANNEL);
if (mode)
{
if (mode->GetNumParams(true))
list.GetToken(par);
else
par.clear();
mode->OnModeChange(ServerInstance->FakeClient, ServerInstance->FakeClient, c, par, true);
}
}
}
}
}
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;
}
unsigned int ModeParser::ProcessSingle(User* user, Channel* targetchannel, User* targetuser, Modes::ChangeList& changelist, ModeProcessFlag flags, unsigned int beginindex)
{
LastParse.clear();
LastChangeList.clear();
unsigned int modes_processed = 0;
std::string output_mode;
std::string output_parameters;
char output_pm = '\0'; // current output state, '+' or '-'
Modes::ChangeList::List& list = changelist.getlist();
for (Modes::ChangeList::List::iterator i = list.begin()+beginindex; i != list.end(); ++i)
{
modes_processed++;
Modes::Change& item = *i;
ModeHandler* mh = item.mh;
// If the mode is supposed to have a parameter then we first take a look at item.param
// and, if we were asked to, also handle mode merges now
if (mh->GetNumParams(item.adding))
{
// Skip the mode if the parameter does not pass basic validation
if (!IsModeParamValid(user, targetchannel, targetuser, item))
continue;
// If this is a merge and we won we don't apply this mode
if ((flags & MODE_MERGE) && (!ShouldApplyMergedMode(targetchannel, item)))
continue;
}
ModeAction ma = TryMode(user, targetuser, targetchannel, item, (!(flags & MODE_CHECKACCESS)));
if (ma != MODEACTION_ALLOW)
continue;
char needed_pm = item.adding ? '+' : '-';
if (needed_pm != output_pm)
{
output_pm = needed_pm;
output_mode.append(1, output_pm);
}
output_mode.push_back(mh->GetModeChar());
if (!item.param.empty())
{
output_parameters.push_back(' ');
output_parameters.append(item.param);
}
LastChangeList.push(mh, item.adding, item.param);
if ((output_mode.length() + output_parameters.length() > 450)
|| (output_mode.length() > 100)
|| (LastChangeList.size() >= ServerInstance->Config->Limits.MaxModes))
{
/* mode sequence is getting too long */
break;
}
}
if (!output_mode.empty())
{
LastParse = targetchannel ? targetchannel->name : targetuser->nick;
LastParse.append(" ");
LastParse.append(output_mode);
LastParse.append(output_parameters);
if (targetchannel)
targetchannel->WriteChannel(user, "MODE " + LastParse);
else
targetuser->WriteFrom(user, "MODE " + LastParse);
FOREACH_MOD(OnMode, (user, targetuser, targetchannel, LastChangeList, flags, output_mode));
}
return modes_processed;
}
CmdResult CommandUID::HandleServer(TreeServer* remoteserver, std::vector<std::string>& params)
{
/**
* 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 = ServerCommand::ExtractTS(params[1]);
time_t signon = ServerCommand::ExtractTS(params[7]);
std::string empty;
const std::string& modestr = params[8];
// Check if the length of the uuid is correct and confirm the sid portion of the uuid matches the sid of the server introducing the user
if (params[0].length() != UIDGenerator::UUID_LENGTH || params[0].compare(0, 3, remoteserver->GetID()))
throw ProtocolException("Bogus UUID");
// Sanity check on mode string: must begin with '+'
if (modestr[0] != '+')
throw ProtocolException("Invalid mode string");
// See if there is a nick collision
User* collideswith = ServerInstance->FindNickOnly(params[2]);
if ((collideswith) && (collideswith->registered != REG_ALL))
{
// User that the incoming user is colliding with is not fully registered, we force nick change the
// unregistered user to their uuid and tell them what happened
collideswith->WriteFrom(collideswith, "NICK %s", collideswith->uuid.c_str());
collideswith->WriteNumeric(ERR_NICKNAMEINUSE, collideswith->nick, "Nickname overruled.");
// Clear the bit before calling User::ChangeNick() to make it NOT run the OnUserPostNick() hook
collideswith->registered &= ~REG_NICK;
collideswith->ChangeNick(collideswith->uuid);
}
else if (collideswith)
{
// The user on this side is registered, handle the collision
bool they_change = Utils->DoCollision(collideswith, remoteserver, age_t, params[5], params[6], params[0], "UID");
if (they_change)
{
// The client being introduced needs to change nick to uuid, change the nick in the message before
// processing/forwarding it. Also change the nick TS to CommandSave::SavedTimestamp.
age_t = CommandSave::SavedTimestamp;
params[1] = ConvToStr(CommandSave::SavedTimestamp);
params[2] = params[0];
}
}
/* For remote users, we pass the UUID they sent to the constructor.
* If the UUID already exists User::User() throws an exception which causes this connection to be closed.
*/
RemoteUser* _new = new SpanningTree::RemoteUser(params[0], remoteserver);
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.back();
_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)
throw ProtocolException("Unrecognised mode '" + std::string(1, *v) + "'");
if (mh->GetNumParams(true))
{
if (paramptr >= params.size() - 1)
throw ProtocolException("Out of parameters while processing modes");
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->AddClone(_new);
remoteserver->UserCount++;
bool dosend = true;
if ((Utils->quiet_bursts && remoteserver->IsBehindBursting()) || _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;
}
