2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2017-2019 Sadie Powell <sadie@witchery.services>
5 * Copyright (C) 2013 Adam <Adam@anope.org>
6 * Copyright (C) 2012-2016 Attila Molnar <attilamolnar@hush.com>
7 * Copyright (C) 2012 Robby <robby@chatbelgie.be>
8 * Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
9 * Copyright (C) 2008, 2010 Craig Edwards <brain@inspircd.org>
10 * Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
12 * This file is part of InspIRCd. InspIRCd is free software: you can
13 * redistribute it and/or modify it under the terms of the GNU General Public
14 * License as published by the Free Software Foundation, version 2.
16 * This program is distributed in the hope that it will be useful, but WITHOUT
17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
18 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
30 #include "treeserver.h"
31 #include "remoteuser.h"
33 CmdResult CommandUID::HandleServer(TreeServer* remoteserver, CommandBase::Params& params)
36 * 0 1 2 3 4 5 6 7 8 9 (n-1)
37 * UID uuid age nick host dhost ident ip.string signon +modes (modepara) :real
39 time_t age_t = ServerCommand::ExtractTS(params[1]);
40 time_t signon = ServerCommand::ExtractTS(params[7]);
42 const std::string& modestr = params[8];
44 // Check if the length of the uuid is correct and confirm the sid portion of the uuid matches the sid of the server introducing the user
45 if (params[0].length() != UIDGenerator::UUID_LENGTH || params[0].compare(0, 3, remoteserver->GetId()))
46 throw ProtocolException("Bogus UUID");
47 // Sanity check on mode string: must begin with '+'
48 if (modestr[0] != '+')
49 throw ProtocolException("Invalid mode string");
51 // See if there is a nick collision
52 User* collideswith = ServerInstance->FindNickOnly(params[2]);
53 if ((collideswith) && (collideswith->registered != REG_ALL))
55 // User that the incoming user is colliding with is not fully registered, we force nick change the
56 // unregistered user to their uuid and tell them what happened
57 LocalUser* const localuser = static_cast<LocalUser*>(collideswith);
58 localuser->OverruleNick();
60 else if (collideswith)
62 // The user on this side is registered, handle the collision
63 bool they_change = Utils->DoCollision(collideswith, remoteserver, age_t, params[5], params[6], params[0], "UID");
66 // The client being introduced needs to change nick to uuid, change the nick in the message before
67 // processing/forwarding it. Also change the nick TS to CommandSave::SavedTimestamp.
68 age_t = CommandSave::SavedTimestamp;
69 params[1] = ConvToStr(CommandSave::SavedTimestamp);
70 params[2] = params[0];
74 /* For remote users, we pass the UUID they sent to the constructor.
75 * If the UUID already exists User::User() throws an exception which causes this connection to be closed.
77 RemoteUser* _new = new SpanningTree::RemoteUser(params[0], remoteserver);
78 ServerInstance->Users->clientlist[params[2]] = _new;
79 _new->nick = params[2];
80 _new->ChangeRealHost(params[3], false);
81 _new->ChangeDisplayedHost(params[4]);
82 _new->ident = params[5];
83 _new->ChangeRealName(params.back());
84 _new->registered = REG_ALL;
85 _new->signon = signon;
88 unsigned int paramptr = 9;
90 for (std::string::const_iterator v = modestr.begin(); v != modestr.end(); ++v)
92 // Accept more '+' chars, for now
96 /* For each mode that's set, find the mode handler and set it on the new user */
97 ModeHandler* mh = ServerInstance->Modes->FindMode(*v, MODETYPE_USER);
99 throw ProtocolException("Unrecognised mode '" + std::string(1, *v) + "'");
101 if (mh->NeedsParam(true))
103 if (paramptr >= params.size() - 1)
104 throw ProtocolException("Out of parameters while processing modes");
105 std::string mp = params[paramptr++];
107 * All modes are assumed to succeed here as they are being set by a remote server.
108 * Modes CANNOT FAIL here. If they DO fail, then the failure is ignored. This is important
109 * to note as all but one modules currently cannot ever fail in this situation, except for
110 * m_servprotect which specifically works this way to prevent the mode being set ANYWHERE
111 * but here, at client introduction. You may safely assume this behaviour is standard and
112 * will not change in future versions if you want to make use of this protective behaviour
115 mh->OnModeChange(_new, _new, NULL, mp, true);
118 mh->OnModeChange(_new, _new, NULL, empty, true);
119 _new->SetMode(mh, true);
122 _new->SetClientIP(params[6]);
124 ServerInstance->Users->AddClone(_new);
125 remoteserver->UserCount++;
129 if ((Utils->quiet_bursts && remoteserver->IsBehindBursting()) || _new->server->IsSilentULine())
133 ServerInstance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s (%s) [%s]", remoteserver->GetName().c_str(), _new->GetFullRealHost().c_str(), _new->GetIPString().c_str(), _new->GetRealName().c_str());
135 FOREACH_MOD(OnPostConnect, (_new));
140 CmdResult CommandFHost::HandleRemote(RemoteUser* src, Params& params)
142 src->ChangeDisplayedHost(params[0]);
146 CmdResult CommandFIdent::HandleRemote(RemoteUser* src, Params& params)
148 src->ChangeIdent(params[0]);
152 CmdResult CommandFName::HandleRemote(RemoteUser* src, Params& params)
154 src->ChangeRealName(params[0]);
158 CommandUID::Builder::Builder(User* user)
159 : CmdBuilder(TreeServer::Get(user), "UID")
164 push(user->GetRealHost());
165 push(user->GetDisplayedHost());
167 push(user->GetIPString());
168 push_int(user->signon);
169 push(user->GetModeLetters(true));
170 push_last(user->GetRealName());