/*
* InspIRCd -- Internet Relay Chat Daemon
*
- * Copyright (C) 2007-2008, 2012 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2019 linuxdaemon <linuxdaemon.irc@gmail.com>
+ * Copyright (C) 2013, 2018-2019 Sadie Powell <sadie@witchery.services>
+ * Copyright (C) 2013 Adam <Adam@anope.org>
+ * Copyright (C) 2012-2016 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) 2007-2008 Craig Edwards <craigedwards@brainbox.cc>
- * Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
- * Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
+ * Copyright (C) 2008, 2012 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2007-2008, 2010 Craig Edwards <brain@inspircd.org>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
#include "inspircd.h"
-#include "socket.h"
-#include "xline.h"
-#include "socketengine.h"
#include "main.h"
#include "utils.h"
#include "treeserver.h"
-#include "link.h"
#include "treesocket.h"
#include "resolvers.h"
+#include "commands.h"
/* Handle ERROR command */
-void TreeSocket::Error(parameterlist ¶ms)
+void TreeSocket::Error(CommandBase::Params& params)
{
std::string msg = params.size() ? params[0] : "";
SetError("received ERROR " + msg);
}
-void TreeSocket::Split(const std::string& line, std::string& prefix, std::string& command, parameterlist& params)
+void TreeSocket::Split(const std::string& line, std::string& tags, std::string& prefix, std::string& command, CommandBase::Params& params)
{
+ std::string token;
irc::tokenstream tokens(line);
- if (!tokens.GetToken(prefix))
+ if (!tokens.GetMiddle(token))
return;
-
- if (prefix[0] == ':')
- {
- prefix = prefix.substr(1);
- if (prefix.empty())
+ if (token[0] == '@')
+ {
+ if (token.length() <= 1)
{
- this->SendError("BUG (?) Empty prefix received: " + line);
+ this->SendError("BUG: Received a message with empty tags: " + line);
return;
}
- if (!tokens.GetToken(command))
+
+ tags.assign(token, 1, std::string::npos);
+ if (!tokens.GetMiddle(token))
{
- this->SendError("BUG (?) Empty command received: " + line);
+ this->SendError("BUG: Received a message with no command: " + line);
return;
}
}
- else
- {
- command = prefix;
- prefix.clear();
- }
- if (command.empty())
- this->SendError("BUG (?) Empty command received: " + line);
- std::string param;
- while (tokens.GetToken(param))
+ if (token[0] == ':')
{
- params.push_back(param);
+ if (token.length() <= 1)
+ {
+ this->SendError("BUG: Received a message with an empty prefix: " + line);
+ return;
+ }
+
+ prefix.assign(token, 1, std::string::npos);
+ if (!tokens.GetMiddle(token))
+ {
+ this->SendError("BUG: Received a message with no command: " + line);
+ return;
+ }
}
+
+ command.assign(token);
+ while (tokens.GetTrailing(token))
+ params.push_back(token);
}
void TreeSocket::ProcessLine(std::string &line)
{
+ std::string tags;
std::string prefix;
std::string command;
- parameterlist params;
+ CommandBase::Params params;
- ServerInstance->Logs->Log("m_spanningtree", RAWIO, "S[%d] I %s", this->GetFd(), line.c_str());
+ ServerInstance->Logs->Log(MODNAME, LOG_RAWIO, "S[%d] I %s", this->GetFd(), line.c_str());
- Split(line, prefix, command, params);
+ Split(line, tags, prefix, command, params);
if (command.empty())
return;
}
else
{
- this->SendError(std::string("Invalid command in negotiation phase: ") + command.c_str());
+ this->SendError("Invalid command in negotiation phase: " + command);
}
break;
case WAIT_AUTH_2:
}
else if (command == "BURST")
{
- if (params.size())
+ if (!params.empty())
{
- time_t them = atoi(params[0].c_str());
+ time_t them = ConvToNum<time_t>(params[0]);
time_t delta = them - ServerInstance->Time();
- if ((delta < -600) || (delta > 600))
+ if ((delta < -60) || (delta > 60))
{
- ServerInstance->SNO->WriteGlobalSno('l',"\2ERROR\2: Your clocks are out by %d seconds (this is more than five minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs((long)delta));
- SendError("Your clocks are out by "+ConvToStr(abs((long)delta))+" seconds (this is more than five minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
+ ServerInstance->SNO->WriteGlobalSno('l', "\002ERROR\002: Your clocks are off by %ld seconds (this is more than one minute). Link aborted, \002PLEASE SYNC YOUR CLOCKS!\002", labs((long)delta));
+ SendError("Your clocks are out by "+ConvToStr(labs((long)delta))+" seconds (this is more than one minute). Link aborted, PLEASE SYNC YOUR CLOCKS!");
return;
}
- else if ((delta < -30) || (delta > 30))
+ else if ((delta < -15) || (delta > 15))
{
- ServerInstance->SNO->WriteGlobalSno('l',"\2WARNING\2: Your clocks are out by %d seconds. Please consider synching your clocks.", abs((long)delta));
+ ServerInstance->SNO->WriteGlobalSno('l', "\002WARNING\002: Your clocks are off by %ld seconds. Please consider syncing your clocks.", labs((long)delta));
}
}
- this->LinkState = CONNECTED;
- Utils->timeoutlist.erase(this);
-
- MyRoot->bursting = true;
- this->DoBurst(MyRoot);
-
- parameterlist sparams;
- sparams.push_back(MyRoot->GetName());
- sparams.push_back("*");
- sparams.push_back("0");
- sparams.push_back(MyRoot->GetID());
- sparams.push_back(":" + MyRoot->GetDesc());
- Utils->DoOneToAllButSender(ServerInstance->Config->GetSID(), "SERVER", sparams, MyRoot->GetName());
- Utils->DoOneToAllButSender(MyRoot->GetID(), "BURST", params, MyRoot->GetName());
+
+ // Check for duplicate server name/sid again, it's possible that a new
+ // server was introduced while we were waiting for them to send BURST.
+ // (we do not reserve their server name/sid when they send SERVER, we do it now)
+ if (!CheckDuplicate(capab->name, capab->sid))
+ return;
+
+ FinishAuth(capab->name, capab->sid, capab->description, capab->hidden);
}
else if (command == "ERROR")
{
* Credentials have been exchanged, we've gotten their 'BURST' (or sent ours).
* Anything from here on should be accepted a little more reasonably.
*/
- this->ProcessConnectedLine(prefix, command, params);
+ this->ProcessConnectedLine(tags, prefix, command, params);
break;
case DYING:
break;
}
}
-void TreeSocket::ProcessConnectedLine(std::string& prefix, std::string& command, parameterlist& params)
+User* TreeSocket::FindSource(const std::string& prefix, const std::string& command)
{
- User* who = ServerInstance->FindUUID(prefix);
- std::string direction;
+ // Empty prefix means the source is the directly connected server that sent this command
+ if (prefix.empty())
+ return MyRoot->ServerUser;
- if (!who)
+ if (prefix.size() == 3)
{
- TreeServer* ServerSource = Utils->FindServer(prefix);
- if (prefix.empty())
- ServerSource = MyRoot;
+ // Prefix looks like a sid
+ TreeServer* server = Utils->FindServerID(prefix);
+ if (server)
+ return server->ServerUser;
+ }
+ else
+ {
+ // If the prefix string is a uuid FindUUID() returns the appropriate User object
+ User* user = ServerInstance->FindUUID(prefix);
+ if (user)
+ return user;
+ }
- if (ServerSource)
- {
- who = ServerSource->ServerUser;
- }
- else
- {
- /* It is important that we don't close the link here, unknown prefix can occur
- * due to various race conditions such as the KILL message for a user somehow
- * crossing the users QUIT further upstream from the server. Thanks jilles!
- */
- ServerInstance->Logs->Log("m_spanningtree", DEBUG, "Command '%s' from unknown prefix '%s'! Dropping entire command.",
- command.c_str(), prefix.c_str());
- return;
- }
+ // Some implementations wrongly send a server name as prefix occasionally, handle that too for now
+ TreeServer* const server = Utils->FindServer(prefix);
+ if (server)
+ return server->ServerUser;
+
+ /* It is important that we don't close the link here, unknown prefix can occur
+ * due to various race conditions such as the KILL message for a user somehow
+ * crossing the users QUIT further upstream from the server. Thanks jilles!
+ */
+
+ if ((prefix.length() == UIDGenerator::UUID_LENGTH) && (isdigit(prefix[0])) &&
+ ((command == "FMODE") || (command == "MODE") || (command == "KICK") || (command == "TOPIC") || (command == "KILL") || (command == "ADDLINE") || (command == "DELLINE")))
+ {
+ /* Special case, we cannot drop these commands as they've been committed already on a
+ * part of the network by the time we receive them, so in this scenario pretend the
+ * command came from a server to avoid desync.
+ */
+
+ TreeServer* const usersserver = Utils->FindServerID(prefix.substr(0, 3));
+ if (usersserver)
+ return usersserver->ServerUser;
+ return this->MyRoot->ServerUser;
}
- // Make sure prefix is still good
- direction = who->server;
- prefix = who->uuid;
+ // Unknown prefix
+ return NULL;
+}
+
+void TreeSocket::ProcessTag(User* source, const std::string& tag, ClientProtocol::TagMap& tags)
+{
+ std::string tagkey;
+ std::string tagval;
+ const std::string::size_type p = tag.find('=');
+ if (p != std::string::npos)
+ {
+ // Tag has a value
+ tagkey.assign(tag, 0, p);
+ tagval.assign(tag, p + 1, std::string::npos);
+ }
+ else
+ {
+ tagkey.assign(tag);
+ }
+
+ const Events::ModuleEventProvider::SubscriberList& list = Utils->Creator->tagevprov.GetSubscribers();
+ for (Events::ModuleEventProvider::SubscriberList::const_iterator i = list.begin(); i != list.end(); ++i)
+ {
+ ClientProtocol::MessageTagProvider* const tagprov = static_cast<ClientProtocol::MessageTagProvider*>(*i);
+ const ModResult res = tagprov->OnProcessTag(source, tagkey, tagval);
+ if (res == MOD_RES_ALLOW)
+ tags.insert(std::make_pair(tagkey, ClientProtocol::MessageTagData(tagprov, tagval)));
+ else if (res == MOD_RES_DENY)
+ break;
+ }
+}
+
+void TreeSocket::ProcessConnectedLine(std::string& taglist, std::string& prefix, std::string& command, CommandBase::Params& params)
+{
+ User* who = FindSource(prefix, command);
+ if (!who)
+ {
+ ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Command '%s' from unknown prefix '%s'! Dropping entire command.", command.c_str(), prefix.c_str());
+ return;
+ }
/*
* Check for fake direction here, and drop any instances that are found.
* a valid SID or a valid UUID, so that invalid UUID or SID never makes it
* to the higher level functions. -- B
*/
- TreeServer* route_back_again = Utils->BestRouteTo(direction);
- if ((!route_back_again) || (route_back_again->GetSocket() != this))
+ TreeServer* const server = TreeServer::Get(who);
+ if (server->GetSocket() != this)
{
- if (route_back_again)
- ServerInstance->Logs->Log("m_spanningtree",DEBUG,"Protocol violation: Fake direction '%s' from connection '%s'",
- prefix.c_str(),linkID.c_str());
+ ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Protocol violation: Fake direction '%s' from connection '%s'", prefix.c_str(), linkID.c_str());
return;
}
- /*
- * First up, check for any malformed commands (e.g. MODE without a timestamp)
- * and rewrite commands where necessary (SVSMODE -> MODE for services). -- w
- */
- if (command == "SVSMODE") // This isn't in an "else if" so we still force FMODE for changes on channels.
- command = "MODE";
-
- // TODO move all this into Commands
- if (command == "MAP")
- {
- Utils->Creator->HandleMap(params, who);
- }
- else if (command == "SERVER")
- {
- this->RemoteServer(prefix,params);
- }
- else if (command == "ERROR")
- {
- this->Error(params);
- }
- else if (command == "AWAY")
- {
- this->Away(prefix,params);
- }
- else if (command == "PING")
- {
- this->LocalPing(prefix,params);
- }
- else if (command == "PONG")
- {
- TreeServer *s = Utils->FindServer(prefix);
- if (s && s->bursting)
- {
- ServerInstance->SNO->WriteGlobalSno('l',"Server \002%s\002 has not finished burst, forcing end of burst (send ENDBURST!)", prefix.c_str());
- s->FinishBurst();
- }
- this->LocalPong(prefix,params);
- }
- else if (command == "VERSION")
- {
- this->ServerVersion(prefix,params);
- }
- else if (command == "ADDLINE")
- {
- this->AddLine(prefix,params);
- }
- else if (command == "DELLINE")
+ // Translate commands coming from servers using an older protocol
+ if (proto_version < PROTO_NEWEST)
{
- this->DelLine(prefix,params);
- }
- else if (command == "SAVE")
- {
- this->ForceNick(prefix,params);
- }
- else if (command == "OPERQUIT")
- {
- this->OperQuit(prefix,params);
- }
- else if (command == "IDLE")
- {
- this->Whois(prefix,params);
- }
- else if (command == "PUSH")
- {
- this->Push(prefix,params);
- }
- else if (command == "SQUIT")
- {
- if (params.size() == 2)
- {
- this->Squit(Utils->FindServer(params[0]),params[1]);
- }
- }
- else if (command == "SNONOTICE")
- {
- if (params.size() >= 2)
- {
- ServerInstance->SNO->WriteToSnoMask(params[0][0], "From " + who->nick + ": "+ params[1]);
- params[1] = ":" + params[1];
- Utils->DoOneToAllButSender(prefix, command, params, prefix);
- }
- }
- else if (command == "BURST")
- {
- // Set prefix server as bursting
- TreeServer* ServerSource = Utils->FindServer(prefix);
- if (!ServerSource)
- {
- ServerInstance->SNO->WriteGlobalSno('l', "WTF: Got BURST from a non-server(?): %s", prefix.c_str());
+ if (!PreProcessOldProtocolMessage(who, command, params))
return;
- }
-
- ServerSource->bursting = true;
- Utils->DoOneToAllButSender(prefix, command, params, prefix);
}
- else if (command == "ENDBURST")
- {
- TreeServer* ServerSource = Utils->FindServer(prefix);
- if (!ServerSource)
- {
- ServerInstance->SNO->WriteGlobalSno('l', "WTF: Got ENDBURST from a non-server(?): %s", prefix.c_str());
- return;
- }
- ServerSource->FinishBurst();
- Utils->DoOneToAllButSender(prefix, command, params, prefix);
- }
- else if (command == "ENCAP")
- {
- this->Encap(who, params);
- }
- else if (command == "NICK")
+ ServerCommand* scmd = Utils->Creator->CmdManager.GetHandler(command);
+ CommandBase* cmdbase = scmd;
+ Command* cmd = NULL;
+ if (!scmd)
{
- if (params.size() != 2)
- {
- SendError("Protocol violation: NICK message without TS - :"+std::string(who->uuid)+" NICK "+params[0]);
- return;
- }
-
- if (IS_SERVER(who))
- {
- SendError("Protocol violation: Server changing nick");
- return;
- }
-
- /* Update timestamp on user when they change nicks */
- who->age = atoi(params[1].c_str());
-
- /*
- * On nick messages, check that the nick doesnt already exist here.
- * If it does, perform collision logic.
- */
- User* x = ServerInstance->FindNickOnly(params[0]);
- if ((x) && (x != who))
+ // Not a special server-to-server command
+ cmd = ServerInstance->Parser.GetHandler(command);
+ if (!cmd)
{
- int collideret = 0;
- /* x is local, who is remote */
- collideret = this->DoCollision(x, who->age, who->ident, who->GetIPString(), who->uuid);
- if (collideret != 1)
+ if (command == "ERROR")
{
- /*
- * Remote client lost, or both lost, parsing or passing on this
- * nickchange would be pointless, as the incoming client's server will
- * soon recieve SVSNICK to change its nick to its UID. :) -- w00t
- */
+ this->Error(params);
+ return;
+ }
+ else if (command == "BURST")
+ {
+ // This is sent even when there is no need for it, drop it here for now
return;
}
+
+ throw ProtocolException("Unknown command: " + command);
}
- who->ForceNickChange(params[0].c_str());
- Utils->RouteCommand(route_back_again, command, params, who);
+ cmdbase = cmd;
}
- else
+
+ if (params.size() < cmdbase->min_params)
+ throw ProtocolException("Insufficient parameters");
+
+ if ((!params.empty()) && (params.back().empty()) && (!cmdbase->allow_empty_last_param))
{
- Command* cmd = ServerInstance->Parser->GetHandler(command);
-
- if (!cmd)
- {
- irc::stringjoiner pmlist(" ", params, 0, params.size() - 1);
- ServerInstance->Logs->Log("m_spanningtree", SPARSE, "Unrecognised S2S command :%s %s %s",
- who->uuid.c_str(), command.c_str(), pmlist.GetJoined().c_str());
- SendError("Unrecognised command '" + command + "' -- possibly loaded mismatched modules");
+ // the last param is empty and the command handler doesn't allow that, check if there will be enough params if we drop the last
+ if (params.size()-1 < cmdbase->min_params)
return;
- }
+ params.pop_back();
+ }
- if (params.size() < cmd->min_params)
- {
- irc::stringjoiner pmlist(" ", params, 0, params.size() - 1);
- ServerInstance->Logs->Log("m_spanningtree", SPARSE, "Insufficient parameters for S2S command :%s %s %s",
- who->uuid.c_str(), command.c_str(), pmlist.GetJoined().c_str());
- SendError("Insufficient parameters for command '" + command + "'");
- return;
- }
+ CmdResult res;
+ ClientProtocol::TagMap tags;
+ std::string tag;
+ irc::sepstream tagstream(taglist, ';');
+ while (tagstream.GetToken(tag))
+ ProcessTag(who, tag, tags);
- CmdResult res = cmd->Handle(params, who);
+ CommandBase::Params newparams(params, tags);
+ if (scmd)
+ res = scmd->Handle(who, newparams);
+ else
+ {
+ res = cmd->Handle(who, newparams);
if (res == CMD_INVALID)
- {
- irc::stringjoiner pmlist(" ", params, 0, params.size() - 1);
- ServerInstance->Logs->Log("m_spanningtree", SPARSE, "Error handling S2S command :%s %s %s",
- who->uuid.c_str(), command.c_str(), pmlist.GetJoined().c_str());
- SendError("Error handling '" + command + "' -- possibly loaded mismatched modules");
- }
- else if (res == CMD_SUCCESS)
- Utils->RouteCommand(route_back_again, command, params, who);
+ throw ProtocolException("Error in command handler");
}
+
+ if (res == CMD_SUCCESS)
+ Utils->RouteCommand(server->GetRoute(), cmdbase, newparams, who);
}
void TreeSocket::OnTimeout()
void TreeSocket::Close()
{
- if (fd != -1)
- ServerInstance->GlobalCulls.AddItem(this);
+ if (fd < 0)
+ return;
+
+ ServerInstance->GlobalCulls.AddItem(this);
this->BufferedSocket::Close();
SetError("Remote host closed connection");
// If the connection is fully up (state CONNECTED)
// then propogate a netsplit to all peers.
if (MyRoot)
- Squit(MyRoot,getError());
+ MyRoot->SQuit(getError(), true);
- if (!ConnectionFailureShown)
- {
- ConnectionFailureShown = true;
- ServerInstance->SNO->WriteGlobalSno('l', "Connection to '\2%s\2' failed.",linkID.c_str());
+ ServerInstance->SNO->WriteGlobalSno('l', "Connection to '\002%s\002' failed.", linkID.c_str());
- time_t server_uptime = ServerInstance->Time() - this->age;
- if (server_uptime)
- ServerInstance->SNO->WriteGlobalSno('l', "Connection to '\2%s\2' was established for %s", linkID.c_str(), Utils->Creator->TimeToStr(server_uptime).c_str());
+ time_t server_uptime = ServerInstance->Time() - this->age;
+ if (server_uptime)
+ {
+ std::string timestr = InspIRCd::DurationString(server_uptime);
+ ServerInstance->SNO->WriteGlobalSno('l', "Connection to '\002%s\002' was established for %s", linkID.c_str(), timestr.c_str());
}
}
+
+void TreeSocket::FinishAuth(const std::string& remotename, const std::string& remotesid, const std::string& remotedesc, bool hidden)
+{
+ this->LinkState = CONNECTED;
+ Utils->timeoutlist.erase(this);
+
+ linkID = remotename;
+
+ MyRoot = new TreeServer(remotename, remotedesc, remotesid, Utils->TreeRoot, this, hidden);
+
+ // Mark the server as bursting
+ MyRoot->BeginBurst();
+ this->DoBurst(MyRoot);
+
+ CommandServer::Builder(MyRoot).Forward(MyRoot);
+}
projects / user / henk / code / inspircd.git / blobdiff