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
172
173
174
175
176
|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2010 InspIRCd Development Team
* See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "main.h"
#include "utils.h"
#include "treeserver.h"
#include "link.h"
#include "treesocket.h"
#include "resolvers.h"
/* $ModDep: m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h m_hash.h m_spanningtree/handshaketimer.h */
bool TreeSocket::ParseUID(const std::string &source, parameterlist ¶ms)
{
/** Do we have enough parameters:
* 0 1 2 3 4 5 6 7 8 9 (n-1)
* UID uuid age nick host dhost ident ip.string signon +modes (modepara) :gecos
*/
if (params.size() < 10)
{
this->SendError("Invalid client introduction (wanted 10 or more parameters, got " + (params.empty() ? "0" : ConvToStr(params.size())) + "!)");
return false;
}
time_t age_t = ConvToInt(params[1]);
time_t signon = ConvToInt(params[7]);
std::string empty;
TreeServer* remoteserver = Utils->FindServer(source);
if (!remoteserver)
{
this->SendError("Invalid client introduction (Unknown server "+source+")");
return false;
}
/* Check parameters for validity before introducing the client, discovered by dmb */
else if (!age_t)
{
this->SendError("Invalid client introduction (Invalid TS?)");
return false;
}
else if (!signon)
{
this->SendError("Invalid client introduction (Invalid signon?)");
return false;
}
else if (params[8][0] != '+')
{
this->SendError("Invalid client introduction (Malformed MODE sequence?)");
return false;
}
/* check for collision */
user_hash::iterator iter = ServerInstance->Users->clientlist->find(params[2]);
if (iter != ServerInstance->Users->clientlist->end())
{
/*
* Nick collision.
*/
int collide = this->DoCollision(iter->second, age_t, params[5], params[8], params[0]);
ServerInstance->Logs->Log("m_spanningtree",DEBUG,"*** Collision on %s, collide=%d", params[2].c_str(), collide);
if (collide != 1)
{
/* remote client changed, make sure we change their nick for the hash too */
params[2] = params[0];
}
}
/* IMPORTANT NOTE: For remote users, we pass the UUID in the constructor. This automatically
* sets it up in the UUID hash for us.
*/
User* _new = NULL;
try
{
_new = new RemoteUser(params[0], remoteserver->GetName());
}
catch (...)
{
this->SendError("Protocol violation - Duplicate UUID '" + params[0] + "' on introduction of new user");
return false;
}
(*(ServerInstance->Users->clientlist))[params[2]] = _new;
_new->nick.assign(params[2], 0, MAXBUF);
_new->host.assign(params[3], 0, 64);
_new->dhost.assign(params[4], 0, 64);
_new->ident.assign(params[5], 0, MAXBUF);
_new->fullname.assign(params[params.size() - 1], 0, MAXBUF);
_new->registered = REG_ALL;
_new->signon = signon;
_new->age = age_t;
/* we need to remove the + from the modestring, so we can do our stuff */
std::string::size_type pos_after_plus = params[8].find_first_not_of('+');
if (pos_after_plus != std::string::npos)
params[8] = params[8].substr(pos_after_plus);
unsigned int paramptr = 9;
for (std::string::iterator v = params[8].begin(); v != params[8].end(); v++)
{
if (*v == '+')
continue;
/* For each mode thats set, increase counter */
ModeHandler* mh = ServerInstance->Modes->FindMode(*v, MODETYPE_USER);
if (mh)
{
if (mh->GetNumParams(true))
{
/* 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.
*/
if (paramptr < params.size() - 1)
mh->OnModeChange(_new, _new, NULL, params[paramptr++], true);
else
{
this->SendError(std::string("Broken UID command, expected a parameter for user mode '")+(*v)+"' but there aren't enough parameters in the command!");
return false;
}
}
else
mh->OnModeChange(_new, _new, NULL, empty, true);
_new->SetMode(*v, true);
}
else
{
this->SendError(std::string("Warning: Broken UID command, unknown user mode '")+(*v)+"' in the mode string! (mismatched module?)");
return false;
}
}
/* now we've done with modes processing, put the + back for remote servers */
if (params[8][0] != '+')
params[8] = "+" + params[8];
_new->SetClientIP(params[6].c_str());
ServerInstance->Users->AddGlobalClone(_new);
remoteserver->SetUserCount(1); // increment by 1
bool dosend = true;
if ((this->Utils->quiet_bursts && remoteserver->bursting) || ServerInstance->SilentULine(_new->server))
dosend = false;
if (dosend)
ServerInstance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s] [%s]", _new->server.c_str(), _new->nick.c_str(), _new->ident.c_str(), _new->host.c_str(), _new->GetIPString(), _new->fullname.c_str());
params[params.size() - 1] = ":" + params[params.size() - 1];
Utils->DoOneToAllButSender(source, "UID", params, source);
FOREACH_MOD(I_OnPostConnect,OnPostConnect(_new));
return true;
}
|
