Shuffle the modules about a bit.

1 files changed, 251 insertions, 0 deletions

diff --git a/modules/spanningtree/server.cpp b/modules/spanningtree/server.cpp
new file mode 100644
index 000000000..2da9e2a00
--- /dev/null
+++ b/modules/spanningtree/server.cpp
@@ -0,0 +1,251 @@
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ *   Copyright (C) 2017-2020, 2022-2024 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2013-2016 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2012, 2019 Robby <robby@chatbelgie.be>
+ *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2009 Uli Schlachter <psychon@znc.in>
+ *   Copyright (C) 2008-2010 Craig Edwards <brain@inspircd.org>
+ *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
+ *
+ * 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 "modules/ssl.h"
+
+#include "main.h"
+#include "utils.h"
+#include "link.h"
+#include "treeserver.h"
+#include "treesocket.h"
+#include "commands.h"
+
+/*
+ * Some server somewhere in the network introducing another server.
+ *	-- w
+ */
+CmdResult CommandServer::HandleServer(TreeServer* ParentOfThis, Params& params)
+{
+	const std::string& servername = params[0];
+	const std::string& sid = params[1];
+	const std::string& description = params.back();
+	TreeSocket* socket = ParentOfThis->GetSocket();
+
+	if (!InspIRCd::IsSID(sid))
+	{
+		socket->SendError("Invalid format server ID: "+sid+"!");
+		return CmdResult::FAILURE;
+	}
+	TreeServer* CheckDupe = Utils->FindServer(servername);
+	if (CheckDupe)
+	{
+		socket->SendError("Server "+servername+" already exists!");
+		ServerInstance->SNO.WriteToSnoMask('L', "Server \002"+CheckDupe->GetName()+"\002 being introduced from \002" + ParentOfThis->GetName() + "\002 denied, already exists. Closing link with " + ParentOfThis->GetName());
+		return CmdResult::FAILURE;
+	}
+	CheckDupe = Utils->FindServer(sid);
+	if (CheckDupe)
+	{
+		socket->SendError("Server ID "+sid+" already exists! You may want to specify the server ID for the server manually with <server:id> so they do not conflict.");
+		ServerInstance->SNO.WriteToSnoMask('L', "Server \002"+servername+"\002 being introduced from \002" + ParentOfThis->GetName() + "\002 denied, server ID already exists on the network. Closing link with " + ParentOfThis->GetName());
+		return CmdResult::FAILURE;
+	}
+
+	TreeServer* route = ParentOfThis->GetRoute();
+	std::shared_ptr<Link> lnk = Utils->FindLink(route->GetName());
+	auto* Node = new TreeServer(servername, description, sid, ParentOfThis, ParentOfThis->GetSocket(), lnk ? lnk->Hidden : false);
+
+	HandleExtra(Node, params);
+
+	ServerInstance->SNO.WriteToSnoMask('L', "Server \002"+ParentOfThis->GetName()+"\002 introduced server \002"+servername+"\002 ("+description+")");
+	return CmdResult::SUCCESS;
+}
+
+void CommandServer::HandleExtra(TreeServer* newserver, Params& params)
+{
+	for (CommandBase::Params::const_iterator i = params.begin() + 2; i != params.end() - 1; ++i)
+	{
+		const std::string& prop = *i;
+		std::string::size_type p = prop.find('=');
+
+		std::string key = prop;
+		std::string val;
+		if (p != std::string::npos)
+		{
+			key.erase(p);
+			val.assign(prop, p+1, std::string::npos);
+		}
+
+		if (irc::equals(key, "burst"))
+			newserver->BeginBurst(ConvToNum<uint64_t>(val));
+		else if (irc::equals(key, "hidden"))
+			newserver->Hidden = ConvToNum<bool>(val);
+	}
+}
+
+std::shared_ptr<Link> TreeSocket::AuthRemote(const CommandBase::Params& params)
+{
+	size_t offset = proto_version == PROTO_INSPIRCD_3;
+	if (params.size() < 4+offset)
+	{
+		SendError("Protocol error - Not enough parameters for SERVER command");
+		return nullptr;
+	}
+
+	const std::string& sname = params[0];
+	const std::string& password = params[1];
+	const std::string& sid = params[2+offset];
+	const std::string& description = params.back();
+
+	this->SendCapabilities(2);
+
+	if (!InspIRCd::IsSID(sid))
+	{
+		this->SendError("Invalid format server ID: "+sid+"!");
+		return nullptr;
+	}
+
+	for (const auto& x : Utils->LinkBlocks)
+	{
+		if (!InspIRCd::Match(sname, x->Name))
+			continue;
+
+		if (!ComparePass(*x, password))
+		{
+			ServerInstance->SNO.WriteToSnoMask('l', "Invalid password on link: {}", x->Name);
+			continue;
+		}
+
+		if (!CheckDuplicate(sname, sid))
+			return nullptr;
+
+		const SSLIOHook* const ssliohook = SSLIOHook::IsSSL(this);
+		if (ssliohook)
+		{
+			std::string ciphersuite;
+			ssliohook->GetCiphersuite(ciphersuite);
+			ServerInstance->SNO.WriteToSnoMask('l', "Negotiated ciphersuite {} on link {}", ciphersuite, x->Name);
+		}
+		else if (!capab->remotesa.is_local())
+		{
+			this->SendError("Non-local server connections MUST be linked with SSL!");
+			return nullptr;
+		}
+
+		ServerInstance->SNO.WriteToSnoMask('l', "Verified server connection " + linkID + " ("+description+")");
+		return x;
+	}
+
+	this->SendError("Mismatched server name or password (check the other server's snomask output for details - e.g. user mode +s +Ll)");
+	ServerInstance->SNO.WriteToSnoMask('l', "Server connection from \002"+sname+"\002 denied, invalid link credentials");
+	return nullptr;
+}
+
+/*
+ * This is used after the other side of a connection has accepted our credentials.
+ * They are then introducing themselves to us, BEFORE either of us burst. -- w
+ */
+bool TreeSocket::Outbound_Reply_Server(CommandBase::Params& params)
+{
+	const std::shared_ptr<Link> x = AuthRemote(params);
+	if (x)
+	{
+		/*
+		 * They're in WAIT_AUTH_2 (having accepted our credentials).
+		 * Set our state to CONNECTED (since everything's peachy so far) and send our
+		 * netburst to them, which will trigger their CONNECTED state, and BURST in reply.
+		 *
+		 * While we're at it, create a treeserver object so we know about them.
+		 *   -- w
+		 */
+		FinishAuth(params[0], params[proto_version == PROTO_INSPIRCD_3 ? 3 : 2], params.back(), x->Hidden);
+
+		return true;
+	}
+
+	return false;
+}
+
+bool TreeSocket::CheckDuplicate(const std::string& sname, const std::string& sid)
+{
+	// Check if the server name is not in use by a server that's already fully connected
+	TreeServer* CheckDupe = Utils->FindServer(sname);
+	if (CheckDupe)
+	{
+		std::string pname = CheckDupe->GetParent() ? CheckDupe->GetParent()->GetName() : "<ourself>";
+		SendError("Server "+sname+" already exists on server "+pname+"!");
+		ServerInstance->SNO.WriteToSnoMask('l', "Server connection from \002"+sname+"\002 denied, already exists on server "+pname);
+		return false;
+	}
+
+	// Check if the id is not in use by a server that's already fully connected
+	ServerInstance->Logs.Debug(MODNAME, "Looking for dupe SID {}", sid);
+	CheckDupe = Utils->FindServerID(sid);
+
+	if (CheckDupe)
+	{
+		this->SendError("Server ID "+CheckDupe->GetId()+" already exists on server "+CheckDupe->GetName()+"! You may want to specify the server ID for the server manually with <server:id> so they do not conflict.");
+		ServerInstance->SNO.WriteToSnoMask('l', "Server connection from \002"+sname+"\002 denied, server ID '"+CheckDupe->GetId()+
+				"' already exists on server "+CheckDupe->GetName());
+		return false;
+	}
+
+	return true;
+}
+
+/*
+ * Someone else is attempting to connect to us if this is called. Validate their credentials etc.
+ *		-- w
+ */
+bool TreeSocket::Inbound_Server(CommandBase::Params& params)
+{
+	const std::shared_ptr<Link> x = AuthRemote(params);
+	if (x)
+	{
+		// Save these for later, so when they accept our credentials (indicated by BURST) we remember them
+		this->capab->hidden = x->Hidden;
+		this->capab->sid = params[proto_version == PROTO_INSPIRCD_3 ? 3 : 2];
+		this->capab->description = params.back();
+		this->capab->name = params[0];
+
+		// Send our details: Our server name and description and hopcount of 0,
+		// along with the sendpass from this block.
+		this->WriteLine(fmt::format("SERVER {} {} {}{} :{}",
+			ServerInstance->Config->ServerName,
+			TreeSocket::MakePass(x->SendPass, this->GetTheirChallenge()),
+			proto_version == PROTO_INSPIRCD_3 ? "0 " : "",
+			ServerInstance->Config->ServerId,
+			ServerInstance->Config->ServerDesc
+		));
+
+		// move to the next state, we are now waiting for THEM.
+		this->LinkState = WAIT_AUTH_2;
+		return true;
+	}
+
+	return false;
+}
+
+CommandServer::Builder::Builder(TreeServer* server)
+	: CmdBuilder(server->GetParent(), "SERVER")
+{
+	push(server->GetName());
+	push(server->GetId());
+	if (server->IsBursting())
+		push_property("burst", ConvToStr(server->StartBurst));
+	push_property("hidden", ConvToStr(server->Hidden));
+	push_last(server->GetDesc());
+}