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anope/modules/protocol/charybdis.cpp
T
Adam fee016bb84 Handle nick collisions somewhat instead of blindly overwriting the nicks 
in memory, which does weird things.

For fun different ircds implement this differently (Unreal compares
timestamps, TS6 compares timestamps and user username/host), and whether
or not we get a kill for our user also varies, so just kill everyone.

This can't really happen anyway with properly set qlines, only if
services haven't yet set the qlines, or possibly in a bot add/nick
user introduce race, or with enforcers, which not many ircds require.
2014-02-27 22:42:54 -05:00

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/* Charybdis IRCD functions
*
* (C) 2003-2014 Anope Team
* Contact us at team@anope.org
*
* Please read COPYING and README for further details.
*
* Based on the original code of Epona by Lara.
* Based on the original code of Services by Andy Church.
*/
#include "module.h"
#include "modules/cs_mode.h"
#include "modules/sasl.h"
static Anope::string UplinkSID;
static ServiceReference<IRCDProto> ratbox("IRCDProto", "ratbox");
class ChannelModeLargeBan : public ChannelMode
{
public:
ChannelModeLargeBan(const Anope::string &mname, char modeChar) : ChannelMode(mname, modeChar) { }
bool CanSet(User *u) const anope_override
{
return u && u->HasMode("OPER");
}
};
class CharybdisProto : public IRCDProto
{
public:
CharybdisProto(Module *creator) : IRCDProto(creator, "Charybdis 3.4+")
{
DefaultPseudoclientModes = "+oiS";
CanCertFP = true;
CanSNLine = true;
CanSQLine = true;
CanSZLine = true;
CanSVSNick = true;
CanSVSHold = true;
CanSetVHost = true;
RequiresID = true;
MaxModes = 4;
}
void SendSVSKillInternal(const MessageSource &source, User *targ, const Anope::string &reason) anope_override { ratbox->SendSVSKillInternal(source, targ, reason); }
void SendGlobalNotice(BotInfo *bi, const Server *dest, const Anope::string &msg) anope_override { ratbox->SendGlobalNotice(bi, dest, msg); }
void SendGlobalPrivmsg(BotInfo *bi, const Server *dest, const Anope::string &msg) anope_override { ratbox->SendGlobalPrivmsg(bi, dest, msg); }
void SendGlobopsInternal(const MessageSource &source, const Anope::string &buf) anope_override { ratbox->SendGlobopsInternal(source, buf); }
void SendSGLine(User *u, const XLine *x) anope_override { ratbox->SendSGLine(u, x); }
void SendSGLineDel(const XLine *x) anope_override { ratbox->SendSGLineDel(x); }
void SendAkill(User *u, XLine *x) anope_override { ratbox->SendAkill(u, x); }
void SendAkillDel(const XLine *x) anope_override { ratbox->SendAkillDel(x); }
void SendSQLineDel(const XLine *x) anope_override { ratbox->SendSQLineDel(x); }
void SendJoin(User *user, Channel *c, const ChannelStatus *status) anope_override { ratbox->SendJoin(user, c, status); }
void SendServer(const Server *server) anope_override { ratbox->SendServer(server); }
void SendChannel(Channel *c) anope_override { ratbox->SendChannel(c); }
void SendTopic(const MessageSource &source, Channel *c) anope_override { ratbox->SendTopic(source, c); }
bool IsIdentValid(const Anope::string &ident) anope_override { return ratbox->IsIdentValid(ident); }
void SendLogin(User *u, NickAlias *na) anope_override { ratbox->SendLogin(u, na); }
void SendLogout(User *u) anope_override { ratbox->SendLogout(u); }
void SendSQLine(User *, const XLine *x) anope_override
{
UplinkSocket::Message(Me) << "RESV * " << x->mask << " :" << x->GetReason();
}
void SendConnect() anope_override
{
UplinkSocket::Message() << "PASS " << Config->Uplinks[Anope::CurrentUplink].password << " TS 6 :" << Me->GetSID();
/*
* Received: CAPAB :BAN CHW CLUSTER ENCAP EOPMOD EUID EX IE KLN
* KNOCK MLOCK QS RSFNC SAVE SERVICES TB UNKLN
*
* BAN - Can do BAN message
* CHW - Can do channel wall @#
* CLUSTER - Supports umode +l, can send LOCOPS (encap only)
* ENCAP - Can do ENCAP message
* EOPMOD - Can do channel wall =# (for cmode +z)
* EUID - Can do EUID (its similar to UID but includes the ENCAP REALHOST and ENCAP LOGIN information)
* EX - Can do channel +e exemptions
* GLN - Can set G:Lines
* IE - Can do invite exceptions
* KLN - Can set K:Lines (encap only)
* KNOCK - Supports KNOCK
* MLOCK - Supports MLOCK
* RSFNC - Forces a nickname change and propagates it (encap only)
* SERVICES - Support channel mode +r (only registered users may join)
* SAVE - Resolve a nick collision by changing a nickname to the UID.
* TB - Supports topic burst
* UNKLN - Can do UNKLINE (encap only)
* QS - Can handle quit storm removal
*/
UplinkSocket::Message() << "CAPAB :BAN CHW CLUSTER ENCAP EOPMOD EUID EX IE KLN KNOCK MLOCK QS RSFNC SERVICES TB UNKLN";
/* Make myself known to myself in the serverlist */
SendServer(Me);
/*
* Received: SVINFO 6 6 0 :1353235537
* arg[0] = current TS version
* arg[1] = minimum required TS version
* arg[2] = '0'
* arg[3] = server's idea of UTC time
*/
UplinkSocket::Message() << "SVINFO 6 6 0 :" << Anope::CurTime;
}
void SendClientIntroduction(User *u) anope_override
{
Anope::string modes = "+" + u->GetModes();
UplinkSocket::Message(Me) << "EUID " << u->nick << " 1 " << u->timestamp << " " << modes << " " << u->GetIdent() << " " << u->host << " 0 " << u->GetUID() << " * * :" << u->realname;
}
void SendForceNickChange(User *u, const Anope::string &newnick, time_t when) anope_override
{
UplinkSocket::Message(Me) << "ENCAP " << u->server->GetName() << " RSFNC " << u->GetUID()
<< " " << newnick << " " << when << " " << u->timestamp;
}
void SendSVSHold(const Anope::string &nick, time_t delay) anope_override
{
UplinkSocket::Message(Me) << "ENCAP * NICKDELAY " << delay << " " << nick;
}
void SendSVSHoldDel(const Anope::string &nick) anope_override
{
UplinkSocket::Message(Me) << "ENCAP * NICKDELAY 0 " << nick;
}
void SendVhost(User *u, const Anope::string &ident, const Anope::string &host) anope_override
{
UplinkSocket::Message(Me) << "ENCAP * CHGHOST " << u->GetUID() << " :" << host;
}
void SendVhostDel(User *u) anope_override
{
this->SendVhost(u, "", u->host);
}
void SendSASLMessage(const SASL::Message &message) anope_override
{
Server *s = Server::Find(message.target.substr(0, 3));
UplinkSocket::Message(Me) << "ENCAP " << (s ? s->GetName() : message.target.substr(0, 3)) << " SASL " << message.source << " " << message.target << " " << message.type << " " << message.data << (message.ext.empty() ? "" : (" " + message.ext));
}
void SendSVSLogin(const Anope::string &uid, const Anope::string &acc) anope_override
{
Server *s = Server::Find(uid.substr(0, 3));
UplinkSocket::Message(Me) << "ENCAP " << (s ? s->GetName() : uid.substr(0, 3)) << " SVSLOGIN " << uid << " * * * " << acc;
}
};
struct IRCDMessageEncap : IRCDMessage
{
IRCDMessageEncap(Module *creator) : IRCDMessage(creator, "ENCAP", 3) { SetFlag(IRCDMESSAGE_SOFT_LIMIT);}
void Run(MessageSource &source, const std::vector<Anope::string> &params) anope_override
{
User *u = source.GetUser();
// In a burst, states that the source user is logged in as the account.
if (params[1] == "LOGIN" || params[1] == "SU")
{
NickCore *nc = NickCore::Find(params[2]);
if (!nc)
return;
u->Login(nc);
}
// Received: :42XAAAAAE ENCAP * CERTFP :3f122a9cc7811dbad3566bf2cec3009007c0868f
if (params[1] == "CERTFP")
{
u->fingerprint = params[2];
FOREACH_MOD(OnFingerprint, (u));
}
/*
* Received: :42X ENCAP * SASL 42XAAAAAH * S PLAIN
* Received: :42X ENCAP * SASL 42XAAAAAC * D A
*
* Part of a SASL authentication exchange. The mode is 'C' to send some data
* (base64 encoded), or 'S' to end the exchange (data indicates type of
* termination: 'A' for abort, 'F' for authentication failure, 'S' for
* authentication success).
*
* Charybdis only accepts messages from SASL agents; these must have umode +S
*/
if (params[1] == "SASL" && SASL::sasl && params.size() >= 6)
{
SASL::Message m;
m.source = params[2];
m.target = params[3];
m.type = params[4];
m.data = params[5];
m.ext = params.size() > 6 ? params[6] : "";
SASL::sasl->ProcessMessage(m);
}
}
};
struct IRCDMessageEUID : IRCDMessage
{
IRCDMessageEUID(Module *creator) : IRCDMessage(creator, "EUID", 11) { SetFlag(IRCDMESSAGE_REQUIRE_SERVER); }
/*
* :42X EUID DukePyrolator 1 1353240577 +Zi ~jens erft-5d80b00b.pool.mediaWays.net 93.128.176.11 42XAAAAAD * * :jens
* :<SID> EUID <NICK> <HOPS> <TS> +<UMODE> <USERNAME> <VHOST> <IP> <UID> <REALHOST> <ACCOUNT> :<GECOS>
* 0 1 2 3 4 5 6 7 8 9 10
*
* Introduces a user. The hostname field is now always the visible host.
* The realhost field is * if the real host is equal to the visible host.
* The account field is * if the login is not set.
* Note that even if both new fields are *, an EUID command still carries more
* information than a UID command (namely that real host is visible host and the
* user is not logged in with services). Hence a NICK or UID command received
* from a remote server should not be sent in EUID form to other servers.
*/
void Run(MessageSource &source, const std::vector<Anope::string> &params) anope_override
{
NickAlias *na = NULL;
if (params[9] != "*")
na = NickAlias::Find(params[9]);
User::OnIntroduce(params[0], params[4], params[8], params[5], params[6], source.GetServer(), params[10], params[2].is_pos_number_only() ? convertTo<time_t>(params[2]) : Anope::CurTime, params[3], params[7], na ? *na->nc : NULL);
}
};
// we cant use this function from ratbox because we set a local variable here
struct IRCDMessageServer : IRCDMessage
{
IRCDMessageServer(Module *creator) : IRCDMessage(creator, "SERVER", 3) { SetFlag(IRCDMESSAGE_REQUIRE_SERVER); }
// SERVER dev.anope.de 1 :charybdis test server
void Run(MessageSource &source, const std::vector<Anope::string> &params) anope_override
{
// Servers other then our immediate uplink are introduced via SID
if (params[1] != "1")
return;
new Server(source.GetServer() == NULL ? Me : source.GetServer(), params[0], 1, params[2], UplinkSID);
IRCD->SendPing(Me->GetName(), params[0]);
}
};
// we cant use this function from ratbox because we set a local variable here
struct IRCDMessagePass : IRCDMessage
{
IRCDMessagePass(Module *creator) : IRCDMessage(creator, "PASS", 4) { SetFlag(IRCDMESSAGE_REQUIRE_SERVER); }
void Run(MessageSource &source, const std::vector<Anope::string> &params) anope_override
{
// UplinkSID is used in IRCDMessageServer
UplinkSID = params[3];
}
};
class ProtoCharybdis : public Module
{
Module *m_ratbox;
CharybdisProto ircd_proto;
/* Core message handlers */
Message::Away message_away;
Message::Capab message_capab;
Message::Error message_error;
Message::Invite message_invite;
Message::Kick message_kick;
Message::Kill message_kill;
Message::Mode message_mode;
Message::MOTD message_motd;
Message::Notice message_notice;
Message::Part message_part;
Message::Ping message_ping;
Message::Privmsg message_privmsg;
Message::Quit message_quit;
Message::SQuit message_squit;
Message::Stats message_stats;
Message::Time message_time;
Message::Topic message_topic;
Message::Version message_version;
Message::Whois message_whois;
/* Ratbox Message Handlers */
ServiceAlias message_bmask, message_join, message_nick, message_pong, message_sid, message_sjoin,
message_tb, message_tmode, message_uid;
/* Our message handlers */
IRCDMessageEncap message_encap;
IRCDMessageEUID message_euid;
IRCDMessagePass message_pass;
IRCDMessageServer message_server;
bool use_server_side_mlock;
void AddModes()
{
/* Add user modes */
ModeManager::AddUserMode(new UserMode("NOFORWARD", 'Q'));
ModeManager::AddUserMode(new UserMode("REGPRIV", 'R'));
ModeManager::AddUserMode(new UserModeOperOnly("OPERWALLS", 'z'));
ModeManager::AddUserMode(new UserModeNoone("SSL", 'Z'));
/* b/e/I */
ModeManager::AddChannelMode(new ChannelModeList("QUIET", 'q'));
/* Add channel modes */
ModeManager::AddChannelMode(new ChannelMode("BLOCKCOLOR", 'c'));
ModeManager::AddChannelMode(new ChannelMode("NOCTCP", 'C'));
ModeManager::AddChannelMode(new ChannelModeParam("REDIRECT", 'f'));
ModeManager::AddChannelMode(new ChannelMode("ALLOWFORWARD", 'F'));
ModeManager::AddChannelMode(new ChannelMode("ALLINVITE", 'g'));
ModeManager::AddChannelMode(new ChannelModeParam("JOINFLOOD", 'j'));
ModeManager::AddChannelMode(new ChannelModeLargeBan("LBAN", 'L'));
ModeManager::AddChannelMode(new ChannelMode("PERM", 'P'));
ModeManager::AddChannelMode(new ChannelMode("NOFORWARD", 'Q'));
ModeManager::AddChannelMode(new ChannelMode("OPMODERATED", 'z'));
}
public:
ProtoCharybdis(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, PROTOCOL | VENDOR),
ircd_proto(this),
message_away(this), message_capab(this), message_error(this), message_invite(this), message_kick(this),
message_kill(this), message_mode(this), message_motd(this), message_notice(this), message_part(this),
message_ping(this), message_privmsg(this), message_quit(this), message_squit(this), message_stats(this),
message_time(this), message_topic(this), message_version(this), message_whois(this),
message_bmask("IRCDMessage", "charybdis/bmask", "ratbox/bmask"),
message_join("IRCDMessage", "charybdis/join", "ratbox/join"),
message_nick("IRCDMessage", "charybdis/nick", "ratbox/nick"),
message_pong("IRCDMessage", "charybdis/pong", "ratbox/pong"),
message_sid("IRCDMessage", "charybdis/sid", "ratbox/sid"),
message_sjoin("IRCDMessage", "charybdis/sjoin", "ratbox/sjoin"),
message_tb("IRCDMessage", "charybdis/tb", "ratbox/tb"),
message_tmode("IRCDMessage", "charybdis/tmode", "ratbox/tmode"),
message_uid("IRCDMessage", "charybdis/uid", "ratbox/uid"),
message_encap(this), message_euid(this), message_pass(this), message_server(this)
{
if (ModuleManager::LoadModule("ratbox", User::Find(creator)) != MOD_ERR_OK)
throw ModuleException("Unable to load ratbox");
m_ratbox = ModuleManager::FindModule("ratbox");
if (!m_ratbox)
throw ModuleException("Unable to find ratbox");
if (!ratbox)
throw ModuleException("No protocol interface for ratbox");
this->AddModes();
}
~ProtoCharybdis()
{
m_ratbox = ModuleManager::FindModule("ratbox");
ModuleManager::UnloadModule(m_ratbox, NULL);
}
void OnReload(Configuration::Conf *conf) anope_override
{
use_server_side_mlock = conf->GetModule(this)->Get<bool>("use_server_side_mlock");
}
void OnChannelSync(Channel *c) anope_override
{
if (!c->ci)
return;
ModeLocks *modelocks = c->ci->GetExt<ModeLocks>("modelocks");
if (use_server_side_mlock && modelocks && Servers::Capab.count("MLOCK") > 0)
{
Anope::string modes = modelocks->GetMLockAsString(false).replace_all_cs("+", "").replace_all_cs("-", "");
UplinkSocket::Message(Me) << "MLOCK " << static_cast<long>(c->creation_time) << " " << c->ci->name << " " << modes;
}
}
EventReturn OnMLock(ChannelInfo *ci, ModeLock *lock) anope_override
{
ModeLocks *modelocks = ci->GetExt<ModeLocks>("modelocks");
ChannelMode *cm = ModeManager::FindChannelModeByName(lock->name);
if (use_server_side_mlock && cm && ci->c && modelocks && (cm->type == MODE_REGULAR || cm->type == MODE_PARAM) && Servers::Capab.count("MLOCK") > 0)
{
Anope::string modes = modelocks->GetMLockAsString(false).replace_all_cs("+", "").replace_all_cs("-", "") + cm->mchar;
UplinkSocket::Message(Me) << "MLOCK " << static_cast<long>(ci->c->creation_time) << " " << ci->name << " " << modes;
}
return EVENT_CONTINUE;
}
EventReturn OnUnMLock(ChannelInfo *ci, ModeLock *lock) anope_override
{
ModeLocks *modelocks = ci->GetExt<ModeLocks>("modelocks");
ChannelMode *cm = ModeManager::FindChannelModeByName(lock->name);
if (use_server_side_mlock && cm && modelocks && ci->c && (cm->type == MODE_REGULAR || cm->type == MODE_PARAM) && Servers::Capab.count("MLOCK") > 0)
{
Anope::string modes = modelocks->GetMLockAsString(false).replace_all_cs("+", "").replace_all_cs("-", "").replace_all_cs(cm->mchar, "");
UplinkSocket::Message(Me) << "MLOCK " << static_cast<long>(ci->c->creation_time) << " " << ci->name << " " << modes;
}
return EVENT_CONTINUE;
}
};
MODULE_INIT(ProtoCharybdis)
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