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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2019-2024 Sadie Powell <sadie@sadiepowell.dev>
* Copyright (C) 2012-2015 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2012 Robby <robby@chatbelgie.be>
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2008 Craig Edwards <brain@inspircd.org>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
#include "listmode.h"
#include "xline.h"
#include "treesocket.h"
#include "treeserver.h"
#include "main.h"
#include "commands.h"
/** This function is called when we want to send a netburst to a local
* server. There is a set order we must do this, because for example
* users require their servers to exist, and channels require their
* users to exist. You get the idea.
*/
void TreeSocket::DoBurst(TreeServer* s)
{
ServerInstance->SNO.WriteToSnoMask('l', "Bursting to \002{}\002 (Authentication: {}{}).",
s->GetName(),
capab->auth_fingerprint ? "TLS certificate fingerprint and " : "",
capab->auth_challenge ? "challenge-response" : "plaintext password");
this->CleanNegotiationInfo();
this->WriteLine(CmdBuilder("BURST").push_int(ServerInstance->Time()));
// Introduce all servers behind us
this->SendServers(Utils->TreeRoot, s);
// Introduce all users
this->SendUsers(s);
// Sync all channels
for (const auto& [_, chan] : ServerInstance->Channels.GetChans())
SyncChannel(chan, s);
// Send all xlines
this->SendXLines();
Utils->Creator->synceventprov.Call(&ServerProtocol::SyncEventListener::OnSyncNetwork, *s);
this->WriteLine(CmdBuilder("ENDBURST"));
ServerInstance->SNO.WriteToSnoMask('l', "Finished bursting to \002"+ s->GetName()+"\002.");
}
void TreeSocket::SendServerInfo(TreeServer* from)
{
this->WriteLine(CommandSInfo::Builder(from, "customversion", from->customversion));
this->WriteLine(CommandSInfo::Builder(from, "rawbranch", from->rawbranch));
this->WriteLine(CommandSInfo::Builder(from, "rawversion", from->rawversion));
}
/** Recursively send the server tree.
* This is used during network burst to inform the other server
* (and any of ITS servers too) of what servers we know about.
* If at any point any of these servers already exist on the other
* end, our connection may be terminated.
*/
void TreeSocket::SendServers(TreeServer* Current, TreeServer* s)
{
SendServerInfo(Current);
for (auto* recursive_server : Current->GetChildren())
{
if (recursive_server != s)
{
this->WriteLine(CommandServer::Builder(recursive_server));
/* down to next level */
this->SendServers(recursive_server, s);
}
}
}
// Send one or more FJOINs for a channel of users.
void TreeSocket::SendFJoins(Channel* chan)
{
CommandFJoin::Builder fjoin(chan);
for (const auto& [_, memb] : chan->GetUsers())
fjoin.add(memb);
this->WriteLine(fjoin.finalize());
}
/** Send all XLines we know about */
void TreeSocket::SendXLines()
{
for (const auto& xltype : ServerInstance->XLines->GetAllTypes())
{
/* Expired lines are removed in XLineManager::GetAll() */
XLineLookup* lookup = ServerInstance->XLines->GetAll(xltype);
/* lookup cannot be NULL in this case but a check won't hurt */
if (lookup)
{
for (const auto& [_, xline] : *lookup)
{
/* Is it burstable? this is better than an explicit check for type 'K'.
* We break the loop as NONE of the items in this group are worth iterating.
*/
if (xline->IsBurstable())
this->WriteLine(CommandAddLine::Builder(xline));
}
}
}
}
void TreeSocket::SendListModes(Channel* chan)
{
for (auto* mode : ServerInstance->Modes.GetListModes())
{
ListModeBase::ModeList* list = mode->GetList(chan);
if (!list || list->empty())
continue;
CmdBuilder lmode("LMODE");
lmode.push(chan->name).push_int(chan->age).push(mode->GetModeChar());
for (const auto& entry : *list)
lmode.push(entry.mask).push(entry.setter).push_int(entry.time);
this->WriteLine(lmode.str());
}
}
/** Send channel users, topic, modes and global metadata */
void TreeSocket::SyncChannel(Channel* chan, TreeServer* s)
{
SendFJoins(chan);
// If the topic was ever set, send it, even if it's empty now
// because a new empty topic should override an old non-empty topic
if (chan->topicset != 0)
this->WriteLine(CommandFTopic::Builder(chan));
SpanningTreeUtilities::SendListLimits(chan, this);
SendListModes(chan);
for (const auto& [item, value] : chan->GetExtList())
{
const std::string valuestr = item->ToNetwork(chan, value);
if (!valuestr.empty())
{
this->WriteLine(CommandMetadata::Builder(chan, item->name, valuestr));
item->OnSync(chan, value, s);
}
}
for (const auto& [_, memb] : chan->GetUsers())
{
for (const auto& [item, value] : memb->GetExtList())
{
const std::string valuestr = item->ToNetwork(memb, value);
if (!valuestr.empty())
{
this->WriteLine(CommandMetadata::Builder(memb, item->name, valuestr));
item->OnSync(memb, value, s);
}
}
}
Utils->Creator->synceventprov.Call(&ServerProtocol::SyncEventListener::OnSyncChannel, chan, *s);
}
/** Send all users and their state, including oper and away status and global metadata */
void TreeSocket::SendUsers(TreeServer* s)
{
for (const auto& [_, user] : ServerInstance->Users.GetUsers())
{
if (!user->IsFullyConnected())
continue;
this->WriteLine(CommandUID::Builder(user));
if (user->IsOper())
this->WriteLine(CommandOpertype::Builder(user, user->oper));
if (user->IsAway())
this->WriteLine(CommandAway::Builder(user));
if (user->uniqueusername) // TODO: convert this to BooleanExtItem.
this->WriteLine(CommandMetadata::Builder(user, "uniqueusername", "1"));
for (const auto& [item, obj] : user->GetExtList())
{
const std::string value = item->ToNetwork(user, obj);
if (!value.empty())
{
this->WriteLine(CommandMetadata::Builder(user, item->name, value));
item->OnSync(user, obj, s);
}
}
Utils->Creator->synceventprov.Call(&ServerProtocol::SyncEventListener::OnSyncUser, user, *s);
}
}
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