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anope/modules/protocol/ngircd.cpp
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Sadie Powell 5006993d0a Make the hops parameter to Server optional.
2026-03-26 12:25:09 +00:00

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// Anope IRC Services <https://www.anope.org/>
//
// Copyright (C) 2003-2026 Anope Contributors
// Copyright (C) 2011-2012, 2014 Alex Barton <alex@barton.de>
//
// Anope is free software. You can use, modify, and/or distribute it under the
// terms of version 2 of the GNU General Public License. See docs/LICENSE.txt
// for the complete terms of this license and docs/AUTHORS.txt for a list of
// contributors.
//
// Based on the original code of Epona by Lara
// Based on the original code of Services by Andy Church
//
// SPDX-License-Identifier: GPL-2.0-only
#include "module.h"
#include "numeric.h"
class ngIRCdProto final
: public IRCDProto
{
void SendSVSKill(const MessageSource &source, User *user, const Anope::string &buf) override
{
IRCDProto::SendSVSKill(source, user, buf);
user->KillInternal(source, buf);
}
public:
ngIRCdProto(Module *creator) : IRCDProto(creator, "ngIRCd")
{
DefaultPseudoclientModes = "+oi";
CanCertFP = true;
CanSVSNick = true;
CanSetVHost = true;
CanSetVIdent = true;
MaxModes = 5;
}
void SendAkill(User *u, XLine *x) override
{
// Calculate the time left before this would expire
time_t timeleft = x->expires ? x->expires - Anope::CurTime : x->expires;
Uplink::Send("GLINE", x->mask, timeleft, x->GetReason() + " (" + x->by + ")");
}
void SendAkillDel(const XLine *x) override
{
Uplink::Send("GLINE", x->mask);
}
void SendChannel(Channel *c) override
{
Uplink::Send("CHANINFO", c->name, "+" + c->GetModes(true, true));
}
// Received: :dev.anope.de NICK DukeP 1 ~DukePyro p57ABF9C9.dip.t-dialin.net 1 +i :DukePyrolator
void SendClientIntroduction(User *u) override
{
Uplink::Send("NICK", u->nick, 1, u->GetIdent(), u->host, 1, "+" + u->GetModes(), u->realname);
}
void SendConnect() override
{
Uplink::Send("PASS", Config->Uplinks[Anope::CurrentUplink].password, "0210-IRC+", "Anope|" + Anope::VersionShort() + ":CLHMSo P");
/* Make myself known to myself in the serverlist */
SendServer(Me);
/* finish the enhanced server handshake and register the connection */
this->SendNumeric(RPL_ENDOFMOTD, "*", "End of MOTD command");
}
void SendForceNickChange(User *u, const Anope::string &newnick, time_t when) override
{
Uplink::Send("SVSNICK", u->nick, newnick);
}
void SendGlobalNotice(BotInfo *bi, const Server *dest, const Anope::string &msg) override
{
Uplink::Send(bi, "NOTICE", "$" + dest->GetName(), msg);
}
void SendGlobalPrivmsg(BotInfo *bi, const Server *dest, const Anope::string &msg) override
{
Uplink::Send(bi, "PRIVMSG", "$" + dest->GetName(), msg);
}
void SendGlobops(const MessageSource &source, const Anope::string &buf) override
{
Uplink::Send(source, "WALLOPS", buf);
}
void SendJoin(User *user, Channel *c, const ChannelStatus *status) override
{
Uplink::Send(user, "JOIN", c->name);
if (status)
{
/* First save the channel status incase uc->Status == status */
ChannelStatus cs = *status;
/* If the user is internally on the channel with flags, kill them so that
* the stacker will allow this.
*/
auto *memb = c->FindUser(user);
if (memb != NULL)
memb->status.Clear();
BotInfo *setter = BotInfo::Find(user->GetUID());
for (auto *mode : cs.Modes())
c->SetMode(setter, mode, user->GetUID(), false);
if (memb != NULL)
memb->status = cs;
}
}
void SendLogin(User *u, NickAlias *na) override
{
Uplink::Send("METADATA", u->GetUID(), "accountname", na->nc->display);
}
void SendLogout(User *u) override
{
Uplink::Send("METADATA", u->GetUID(), "accountname", "");
}
/* SERVER name hop descript */
void SendServer(const Server *server) override
{
Uplink::Send("SERVER", server->GetName(), server->GetHops(), server->GetDescription());
}
void SendVHost(User *u, const Anope::string &vident, const Anope::string &vhost) override
{
if (!vident.empty())
Uplink::Send("METADATA", u->nick, "user", vident);
Uplink::Send("METADATA", u->nick, "cloakhost", vhost);
if (!u->HasMode("CLOAK"))
{
u->SetMode(Config->GetClient("HostServ"), "CLOAK");
ModeManager::ProcessModes();
}
}
void SendVHostDel(User *u) override
{
this->SendVHost(u, u->GetIdent(), "");
}
bool Format(Anope::string &message, const Anope::map<Anope::string> &tags, const MessageSource &source, const Anope::string &command, const std::vector<Anope::string> &params) override
{
return IRCDProto::Format(message, tags, source.GetSource().empty() ? Me : source, command, params);
}
};
struct IRCDMessage005 final
: IRCDMessage
{
IRCDMessage005(Module *creator) : IRCDMessage(creator, "005", 1) { SetFlag(FLAG_SOFT_LIMIT); }
// Please see <http://www.irc.org/tech_docs/005.html> for details.
void Run(MessageSource &source, const std::vector<Anope::string> &params, const Anope::map<Anope::string> &tags) override
{
size_t pos;
Anope::string parameter, data;
for (const auto &param : params)
{
pos = param.find('=');
if (pos != Anope::string::npos)
{
parameter = param.substr(0, pos);
data = param.substr(pos+1, param.length());
if (parameter == "MODES")
{
IRCD->MaxModes = Anope::Convert<unsigned>(data, IRCD->MaxModes);
}
else if (parameter == "NICKLEN")
{
IRCD->MaxNick = Anope::Convert<size_t>(data, IRCD->MaxNick);
}
}
}
}
};
struct IRCDMessage376 final
: IRCDMessage
{
IRCDMessage376(Module *creator) : IRCDMessage(creator, "376", 2) { }
/*
* :ngircd.dev.anope.de 376 services.anope.de :End of MOTD command
*
* we do nothing here, this function exists only to
* avoid the "unknown message from server" message.
*
*/
void Run(MessageSource &source, const std::vector<Anope::string> &params, const Anope::map<Anope::string> &tags) override
{
}
};
struct IRCDMessageChaninfo final
: IRCDMessage
{
IRCDMessageChaninfo(Module *creator) : IRCDMessage(creator, "CHANINFO", 2) { SetFlag(FLAG_SOFT_LIMIT); SetFlag(FLAG_REQUIRE_SERVER); }
/*
* CHANINFO is used by servers to inform each other about a channel: its
* modes, channel key, user limits and its topic. The parameter combination
* <key> and <limit> is optional, as well as the <topic> parameter, so that
* there are three possible forms of this command:
*
* CHANINFO <chan> +<modes>
* CHANINFO <chan> +<modes> :<topic>
* CHANINFO <chan> +<modes> <key> <limit> :<topic>
*
* The parameter <key> must be ignored if a channel has no key (the parameter
* <modes> doesn't list the "k" channel mode). In this case <key> should
* contain "*" because the parameter <key> is required by the CHANINFO syntax
* and therefore can't be omitted. The parameter <limit> must be ignored when
* a channel has no user limit (the parameter <modes> doesn't list the "l"
* channel mode). In this case <limit> should be "0".
*/
void Run(MessageSource &source, const std::vector<Anope::string> &params, const Anope::map<Anope::string> &tags) override
{
bool created;
Channel *c = Channel::FindOrCreate(params[0], created);
std::vector<Anope::string> modeparams;
if (params.size() == 3)
{
c->ChangeTopicInternal(NULL, source.GetName(), params[2], Anope::CurTime);
}
else if (params.size() == 5)
{
for (size_t i = 0, end = params[1].length(); i < end; ++i)
{
switch(params[1][i])
{
case 'k':
modeparams.push_back(params[2]);
continue;
case 'l':
modeparams.push_back(params[3]);
continue;
}
}
c->ChangeTopicInternal(NULL, source.GetName(), params[4], Anope::CurTime);
}
c->SetModesInternal(source, params[1], modeparams);
}
};
struct IRCDMessageJoin final
: Message::Join
{
IRCDMessageJoin(Module *creator) : Message::Join(creator, "JOIN") { SetFlag(FLAG_REQUIRE_USER); }
/*
* <@po||ux> DukeP: RFC 2813, 4.2.1: the JOIN command on server-server links
* separates the modes ("o") with ASCII 7, not space. And you can't see ASCII 7.
*
* if a user joins a new channel, the ircd sends <channelname>\7<umode>
*/
void Run(MessageSource &source, const std::vector<Anope::string> &params, const Anope::map<Anope::string> &tags) override
{
User *user = source.GetUser();
size_t pos = params[0].find('\7');
Anope::string channel, modes;
std::vector<Anope::string> modeparams;
if (pos != Anope::string::npos)
{
channel = params[0].substr(0, pos);
modes = '+' + params[0].substr(pos+1, params[0].length());
modeparams.push_back(user->nick);
}
else
{
channel = params[0];
}
std::vector<Anope::string> new_params;
new_params.push_back(channel);
Message::Join::Run(source, new_params, tags);
if (!modes.empty())
{
Channel *c = Channel::Find(channel);
if (c)
c->SetModesInternal(source, modes, modeparams);
}
}
};
struct IRCDMessageMetadata final
: IRCDMessage
{
IRCDMessageMetadata(Module *creator) : IRCDMessage(creator, "METADATA", 3) { SetFlag(FLAG_REQUIRE_SERVER); }
/*
* Received: :ngircd.dev.anope.de METADATA DukePyrolator host :anope-e2ee5c7d
*
* params[0] = nick of the user
* params[1] = command
* params[2] = data
*
* following commands are supported:
* - "accountname": the account name of a client (can't be empty)
* - "certfp": the certificate fingerprint of a client (can't be empty)
* - "cloakhost" : the cloaked hostname of a client
* - "host": the hostname of a client (can't be empty)
* - "info": info text ("real name") of a client
* - "user": the user name (ident) of a client (can't be empty)
*/
void Run(MessageSource &source, const std::vector<Anope::string> &params, const Anope::map<Anope::string> &tags) override
{
User *u = User::Find(params[0]);
if (!u)
{
Log(LOG_DEBUG) << "received METADATA for nonexistent user " << params[0];
return;
}
if (params[1].equals_cs("accountname"))
{
NickCore *nc = NickCore::Find(params[2]);
if (nc)
u->Login(nc);
}
else if (params[1].equals_cs("certfp"))
{
u->fingerprint = params[2];
FOREACH_MOD(OnFingerprint, (u));
}
else if (params[1].equals_cs("cloakhost"))
{
if (!params[2].empty())
u->SetDisplayedHost(params[2]);
}
else if (params[1].equals_cs("host"))
{
u->SetCloakedHost(params[2]);
}
else if (params[1].equals_cs("info"))
{
u->SetRealname(params[2]);
}
else if (params[1].equals_cs("user"))
{
u->SetVIdent(params[2]);
}
}
};
struct IRCDMessageMode final
: IRCDMessage
{
IRCDMessageMode(Module *creator) : IRCDMessage(creator, "MODE", 2) { SetFlag(FLAG_SOFT_LIMIT); }
/*
* Received: :DukeP MODE #anope +b *!*@*.aol.com
* Received: :DukeP MODE #anope +h DukeP
* params[0] = channel or nick
* params[1] = modes
* params[n] = parameters
*/
void Run(MessageSource &source, const std::vector<Anope::string> &params, const Anope::map<Anope::string> &tags) override
{
if (IRCD->IsChannelValid(params[0]))
{
Channel *c = Channel::Find(params[0]);
if (c)
c->SetModesInternal(source, params[1], { params.begin() + 2, params.end() });
}
else
{
User *u = User::Find(params[0]);
if (u)
u->SetModesInternal(source, params[1]);
}
}
};
struct IRCDMessageNick final
: IRCDMessage
{
IRCDMessageNick(Module *creator) : IRCDMessage(creator, "NICK", 1) { SetFlag(FLAG_SOFT_LIMIT); }
/*
* NICK - NEW
* Received: :dev.anope.de NICK DukeP_ 1 ~DukePyro ip-2-201-236-154.web.vodafone.de 1 + :DukePyrolator
* Parameters: <nickname> <hopcount> <username> <host> <servertoken> <umode> :<realname>
* source = server
* params[0] = nick
* params[1] = hopcount
* params[2] = username/ident
* params[3] = host
* params[4] = servertoken
* params[5] = modes
* params[6] = info
*
* NICK - change
* Received: :DukeP_ NICK :test2
* source = oldnick
* params[0] = newnick
*
*/
void Run(MessageSource &source, const std::vector<Anope::string> &params, const Anope::map<Anope::string> &tags) override
{
if (params.size() == 1)
{
User *u = source.GetUser();
// we have a nickchange
if (u)
u->ChangeNick(params[0]);
}
else if (params.size() == 7)
{
// a new user is connecting to the network
Server *s = Server::Find(params[4]);
if (s == NULL)
{
Log(LOG_DEBUG) << "User " << params[0] << " introduced from nonexistent server " << params[4] << "?";
return;
}
User::OnIntroduce(params[0], params[2], params[3], "", "", s, params[6], Anope::CurTime, params[5], "", NULL);
Log(LOG_DEBUG) << "Registered nick \"" << params[0] << "\" on server " << s->GetName() << ".";
}
else
{
Log(LOG_DEBUG) << "Received NICK with invalid number of parameters. source = " << source.GetName() << "params[0] = " << params[0] << "params.size() = " << params.size();
}
}
};
struct IRCDMessageNJoin final
: IRCDMessage
{
IRCDMessageNJoin(Module *creator) : IRCDMessage(creator, "NJOIN",2) { SetFlag(FLAG_REQUIRE_SERVER); };
/*
* RFC 2813, 4.2.2: Njoin Message:
* The NJOIN message is used between servers only.
* It is used when two servers connect to each other to exchange
* the list of channel members for each channel.
*
* Even though the same function can be performed by using a succession
* of JOIN, this message SHOULD be used instead as it is more efficient.
*
* Received: :dev.anope.de NJOIN #test :DukeP2,@DukeP,%test,+test2
*/
void Run(MessageSource &source, const std::vector<Anope::string> &params, const Anope::map<Anope::string> &tags) override
{
std::list<Message::Join::SJoinUser> users;
commasepstream sep(params[1]);
Anope::string buf;
while (sep.GetToken(buf))
{
Message::Join::SJoinUser sju;
/* Get prefixes from the nick */
for (char ch; (ch = ModeManager::GetStatusChar(buf[0]));)
{
buf.erase(buf.begin());
sju.first.AddMode(ch);
}
sju.second = User::Find(buf);
if (!sju.second)
{
Log(LOG_DEBUG) << "NJOIN for nonexistent user " << buf << " on " << params[0];
continue;
}
users.push_back(sju);
}
Message::Join::SJoin(source, params[0], 0, "", {}, users);
}
};
struct IRCDMessagePong final
: IRCDMessage
{
IRCDMessagePong(Module *creator) : IRCDMessage(creator, "PONG", 0) { SetFlag(FLAG_SOFT_LIMIT); SetFlag(FLAG_REQUIRE_SERVER); }
/*
* ngIRCd does not send an EOB, so we send a PING immediately
* when receiving a new server and then finish sync once we
* get a pong back from that server.
*/
void Run(MessageSource &source, const std::vector<Anope::string> &params, const Anope::map<Anope::string> &tags) override
{
if (!source.GetServer()->IsSynced())
source.GetServer()->Sync(false);
}
};
struct IRCDMessageServer final
: IRCDMessage
{
IRCDMessageServer(Module *creator) : IRCDMessage(creator, "SERVER", 3) { SetFlag(FLAG_SOFT_LIMIT); }
/*
* New directly linked server:
*
* SERVER tolsun.oulu.fi 1 :Experimental server
* New server tolsun.oulu.fi introducing itself
* and attempting to register.
*
* params[0] = servername
* params[1] = hop count
* params[2] = server description
*
* New remote server in the network:
*
* :tolsun.oulu.fi SERVER csd.bu.edu 5 34 :BU Central Server
* Server tolsun.oulu.fi is our uplink for csd.bu.edu
* which is 5 hops away. The token "34" will be used
* by tolsun.oulu.fi when introducing new users or
* services connected to csd.bu.edu.
*
* params[0] = servername
* params[1] = hop count
* params[2] = server numeric
* params[3] = server description
*/
void Run(MessageSource &source, const std::vector<Anope::string> &params, const Anope::map<Anope::string> &tags) override
{
if (params.size() == 3)
{
// our uplink is introducing itself
new Server(Me, params[0], params[2], "1", 1);
}
else
{
// our uplink is introducing a new server
auto hops = Anope::Convert<unsigned>(params[1], 0);
new Server(source.GetServer(), params[0], params[3], params[2], hops);
}
/*
* ngIRCd does not send an EOB, so we send a PING immediately
* when receiving a new server and then finish sync once we
* get a pong back from that server.
*/
IRCD->SendPing(Me->GetName(), params[0]);
}
};
struct IRCDMessageTopic final
: IRCDMessage
{
IRCDMessageTopic(Module *creator) : IRCDMessage(creator, "TOPIC", 2) { SetFlag(FLAG_SOFT_LIMIT); }
// Received: :DukeP TOPIC #anope :test
void Run(MessageSource &source, const std::vector<Anope::string> &params, const Anope::map<Anope::string> &tags) override
{
Channel *c = Channel::Find(params[0]);
if (!c)
{
Log(LOG_DEBUG) << "TOPIC for nonexistent channel " << params[0];
return;
}
c->ChangeTopicInternal(source.GetUser(), source.GetName(), params[1], Anope::CurTime);
}
};
class ProtongIRCd final
: public Module
{
ngIRCdProto ircd_proto;
/* Core message handlers */
Message::Capab message_capab;
Message::Error message_error;
Message::Invite message_invite;
Message::Kick message_kick;
Message::Kill message_kill;
Message::MOTD message_motd;
Message::Notice message_notice;
Message::Part message_part;
Message::Ping message_ping;
Message::Privmsg message_privmsg, message_squery;
Message::Quit message_quit;
Message::SQuit message_squit;
Message::Stats message_stats;
Message::Time message_time;
Message::Version message_version;
Message::Whois message_whois;
/* Our message handlers */
IRCDMessage005 message_005;
IRCDMessage376 message_376;
IRCDMessageChaninfo message_chaninfo;
IRCDMessageJoin message_join;
IRCDMessageMetadata message_metadata;
IRCDMessageMode message_mode;
IRCDMessageNick message_nick;
IRCDMessageNJoin message_njoin;
IRCDMessagePong message_pong;
IRCDMessageServer message_server;
IRCDMessageTopic message_topic;
static void AddModes()
{
/* Add user modes */
ModeManager::AddUserMode(new UserMode("NOCTCP", 'b'));
ModeManager::AddUserMode(new UserMode("BOT", 'B'));
ModeManager::AddUserMode(new UserMode("COMMONCHANS", 'C'));
ModeManager::AddUserMode(new UserMode("INVIS", 'i'));
ModeManager::AddUserMode(new UserModeOperOnly("OPER", 'o'));
ModeManager::AddUserMode(new UserModeOperOnly("PROTECTED", 'q'));
ModeManager::AddUserMode(new UserModeOperOnly("RESTRICTED", 'r'));
ModeManager::AddUserMode(new UserModeNoone("REGISTERED", 'R'));
ModeManager::AddUserMode(new UserModeOperOnly("SNOMASK", 's'));
ModeManager::AddUserMode(new UserMode("WALLOPS", 'w'));
ModeManager::AddUserMode(new UserMode("CLOAK", 'x'));
/* Add modes for ban, exception, and invite lists */
ModeManager::AddChannelMode(new ChannelModeList("BAN", 'b'));
ModeManager::AddChannelMode(new ChannelModeList("EXCEPT", 'e'));
ModeManager::AddChannelMode(new ChannelModeList("INVITEOVERRIDE", 'I'));
/* Add channel user modes */
ModeManager::AddChannelMode(new ChannelModeStatus("VOICE", 'v', '+', 0));
ModeManager::AddChannelMode(new ChannelModeStatus("HALFOP", 'h', '%', 1));
ModeManager::AddChannelMode(new ChannelModeStatus("OP", 'o', '@', 2));
ModeManager::AddChannelMode(new ChannelModeStatus("PROTECT", 'a', '&', 3));
ModeManager::AddChannelMode(new ChannelModeStatus("OWNER", 'q', '~', 4));
/* Add channel modes */
ModeManager::AddChannelMode(new ChannelMode("INVITE", 'i'));
ModeManager::AddChannelMode(new ChannelModeKey('k'));
ModeManager::AddChannelMode(new ChannelModeParam("LIMIT", 'l', true));
ModeManager::AddChannelMode(new ChannelMode("MODERATED", 'm'));
ModeManager::AddChannelMode(new ChannelMode("REGMODERATED", 'M'));
ModeManager::AddChannelMode(new ChannelMode("NOEXTERNAL", 'n'));
ModeManager::AddChannelMode(new ChannelMode("OPERONLY", 'O'));
ModeManager::AddChannelMode(new ChannelMode("PERM", 'P'));
ModeManager::AddChannelMode(new ChannelMode("NOKICK", 'Q'));
ModeManager::AddChannelMode(new ChannelModeNoone("REGISTERED", 'r'));
ModeManager::AddChannelMode(new ChannelMode("REGISTEREDONLY", 'R'));
ModeManager::AddChannelMode(new ChannelMode("SECRET", 's'));
ModeManager::AddChannelMode(new ChannelMode("TOPIC", 't'));
ModeManager::AddChannelMode(new ChannelMode("NOINVITE", 'V'));
ModeManager::AddChannelMode(new ChannelMode("SSL", 'z'));
}
public:
ProtongIRCd(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, PROTOCOL | VENDOR),
ircd_proto(this),
message_capab(this), message_error(this), message_invite(this), message_kick(this), message_kill(this),
message_motd(this), message_notice(this), message_part(this), message_ping(this), message_privmsg(this),
message_squery(this, "SQUERY"), message_quit(this), message_squit(this), message_stats(this), message_time(this),
message_version(this), message_whois(this),
message_005(this), message_376(this), message_chaninfo(this), message_join(this), message_metadata(this),
message_mode(this), message_nick(this), message_njoin(this), message_pong(this), message_server(this),
message_topic(this)
{
Servers::Capab.insert("QS");
this->AddModes();
}
void OnUserNickChange(User *u, const Anope::string &) override
{
u->RemoveMode(Config->GetClient("NickServ"), "REGISTERED");
}
};
MODULE_INIT(ProtongIRCd)
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