1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2017-2019 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2013 Adam <Adam@anope.org>
* Copyright (C) 2012-2016 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2012 Robby <robby@chatbelgie.be>
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
* 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 "commands.h"
#include "utils.h"
#include "treeserver.h"
#include "remoteuser.h"
CmdResult CommandUID::HandleServer(TreeServer* remoteserver, CommandBase::Params& params)
{
/**
* 0 1 2 3 4 5 6 7 8 9 (n-1)
* UID uuid age nick host dhost ident ip.string signon +modes (modepara) :real
*/
time_t age_t = ServerCommand::ExtractTS(params[1]);
time_t signon = ServerCommand::ExtractTS(params[7]);
std::string empty;
const std::string& modestr = params[8];
// 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
if (params[0].length() != UIDGenerator::UUID_LENGTH || params[0].compare(0, 3, remoteserver->GetId()))
throw ProtocolException("Bogus UUID");
// Sanity check on mode string: must begin with '+'
if (modestr[0] != '+')
throw ProtocolException("Invalid mode string");
// See if there is a nick collision
User* collideswith = ServerInstance->FindNickOnly(params[2]);
if ((collideswith) && (collideswith->registered != REG_ALL))
{
// User that the incoming user is colliding with is not fully registered, we force nick change the
// unregistered user to their uuid and tell them what happened
LocalUser* const localuser = static_cast<LocalUser*>(collideswith);
localuser->OverruleNick();
}
else if (collideswith)
{
// The user on this side is registered, handle the collision
bool they_change = Utils->DoCollision(collideswith, remoteserver, age_t, params[5], params[6], params[0], "UID");
if (they_change)
{
// The client being introduced needs to change nick to uuid, change the nick in the message before
// processing/forwarding it. Also change the nick TS to CommandSave::SavedTimestamp.
age_t = CommandSave::SavedTimestamp;
params[1] = ConvToStr(CommandSave::SavedTimestamp);
params[2] = params[0];
}
}
/* For remote users, we pass the UUID they sent to the constructor.
* If the UUID already exists User::User() throws an exception which causes this connection to be closed.
*/
RemoteUser* _new = new SpanningTree::RemoteUser(params[0], remoteserver);
ServerInstance->Users->clientlist[params[2]] = _new;
_new->nick = params[2];
_new->ChangeRealHost(params[3], false);
_new->ChangeDisplayedHost(params[4]);
_new->ident = params[5];
_new->ChangeRealName(params.back());
_new->registered = REG_ALL;
_new->signon = signon;
_new->age = age_t;
unsigned int paramptr = 9;
for (std::string::const_iterator v = modestr.begin(); v != modestr.end(); ++v)
{
// Accept more '+' chars, for now
if (*v == '+')
continue;
/* For each mode thats set, find the mode handler and set it on the new user */
ModeHandler* mh = ServerInstance->Modes->FindMode(*v, MODETYPE_USER);
if (!mh)
throw ProtocolException("Unrecognised mode '" + std::string(1, *v) + "'");
if (mh->NeedsParam(true))
{
if (paramptr >= params.size() - 1)
throw ProtocolException("Out of parameters while processing modes");
std::string mp = params[paramptr++];
/* IMPORTANT NOTE:
* All modes are assumed to succeed here as they are being set by a remote server.
* Modes CANNOT FAIL here. If they DO fail, then the failure is ignored. This is important
* to note as all but one modules currently cannot ever fail in this situation, except for
* m_servprotect which specifically works this way to prevent the mode being set ANYWHERE
* but here, at client introduction. You may safely assume this behaviour is standard and
* will not change in future versions if you want to make use of this protective behaviour
* yourself.
*/
mh->OnModeChange(_new, _new, NULL, mp, true);
}
else
mh->OnModeChange(_new, _new, NULL, empty, true);
_new->SetMode(mh, true);
}
_new->SetClientIP(params[6]);
ServerInstance->Users->AddClone(_new);
remoteserver->UserCount++;
bool dosend = true;
if ((Utils->quiet_bursts && remoteserver->IsBehindBursting()) || _new->server->IsSilentULine())
dosend = false;
if (dosend)
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());
FOREACH_MOD(OnPostConnect, (_new));
return CMD_SUCCESS;
}
CmdResult CommandFHost::HandleRemote(RemoteUser* src, Params& params)
{
src->ChangeDisplayedHost(params[0]);
return CMD_SUCCESS;
}
CmdResult CommandFIdent::HandleRemote(RemoteUser* src, Params& params)
{
src->ChangeIdent(params[0]);
return CMD_SUCCESS;
}
CmdResult CommandFName::HandleRemote(RemoteUser* src, Params& params)
{
src->ChangeRealName(params[0]);
return CMD_SUCCESS;
}
CommandUID::Builder::Builder(User* user)
: CmdBuilder(TreeServer::Get(user), "UID")
{
push(user->uuid);
push_int(user->age);
push(user->nick);
push(user->GetRealHost());
push(user->GetDisplayedHost());
push(user->ident);
push(user->GetIPString());
push_int(user->signon);
push(user->GetModeLetters(true));
push_last(user->GetRealName());
}
|
