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
|
/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
* Copyright (C) 2007 Craig Edwards <craigedwards@brainbox.cc>
*
* 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 "cachetimer.h"
#include "resolvers.h"
#include "main.h"
#include "utils.h"
#include "treeserver.h"
#include "link.h"
#include "treesocket.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 */
/** This class is used to resolve server hostnames during /connect and autoconnect.
* As of 1.1, the resolver system is seperated out from BufferedSocket, so we must do this
* resolver step first ourselves if we need it. This is totally nonblocking, and will
* callback to OnLookupComplete or OnError when completed. Once it has completed we
* will have an IP address which we can then use to continue our connection.
*/
ServernameResolver::ServernameResolver(SpanningTreeUtilities* Util, DNS::Manager *mgr, const std::string &hostname, Link* x, DNS::QueryType qt, Autoconnect* myac)
: DNS::Request(mgr, Util->Creator, hostname, qt), Utils(Util), query(qt), host(hostname), MyLink(x), myautoconnect(myac)
{
}
void ServernameResolver::OnLookupComplete(const DNS::Query *r)
{
const DNS::ResourceRecord &ans_record = r->answers[0];
/* Initiate the connection, now that we have an IP to use.
* Passing a hostname directly to BufferedSocket causes it to
* just bail and set its FD to -1.
*/
TreeServer* CheckDupe = Utils->FindServer(MyLink->Name.c_str());
if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
{
TreeSocket* newsocket = new TreeSocket(Utils, MyLink, myautoconnect, ans_record.rdata);
if (newsocket->GetFd() > -1)
{
/* We're all OK */
}
else
{
/* Something barfed, show the opers */
ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: %s.",
MyLink->Name.c_str(), newsocket->getError().c_str());
ServerInstance->GlobalCulls.AddItem(newsocket);
}
}
}
void ServernameResolver::OnError(const DNS::Query *r)
{
/* Ooops! */
if (query == DNS::QUERY_AAAA)
{
ServernameResolver* snr = new ServernameResolver(Utils, this->manager, host, MyLink, DNS::QUERY_A, myautoconnect);
try
{
this->manager->Process(snr);
return;
}
catch (DNS::Exception &)
{
delete snr;
}
}
ServerInstance->SNO->WriteToSnoMask('l', "CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s", MyLink->Name.c_str(), this->manager->GetErrorStr(r->error).c_str());
Utils->Creator->ConnectServer(myautoconnect, false);
}
SecurityIPResolver::SecurityIPResolver(Module* me, SpanningTreeUtilities* U, DNS::Manager *mgr, const std::string &hostname, Link* x, DNS::QueryType qt)
: DNS::Request(mgr, me, hostname, qt), MyLink(x), Utils(U), mine(me), host(hostname), query(qt)
{
}
void SecurityIPResolver::OnLookupComplete(const DNS::Query *r)
{
const DNS::ResourceRecord &ans_record = r->answers[0];
for (std::vector<reference<Link> >::iterator i = Utils->LinkBlocks.begin(); i != Utils->LinkBlocks.end(); ++i)
{
Link* L = *i;
if (L->IPAddr == host)
{
Utils->ValidIPs.push_back(ans_record.rdata);
break;
}
}
}
void SecurityIPResolver::OnError(const DNS::Query *r)
{
if (query == DNS::QUERY_AAAA)
{
SecurityIPResolver* res = new SecurityIPResolver(mine, Utils, this->manager, host, MyLink, DNS::QUERY_A);
try
{
this->manager->Process(res);
return;
}
catch (DNS::Exception &)
{
delete res;
}
}
ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Could not resolve IP associated with Link '%s': %s",
MyLink->Name.c_str(), this->manager->GetErrorStr(r->error).c_str());
}
CacheRefreshTimer::CacheRefreshTimer(SpanningTreeUtilities* Util)
: Timer(3600, ServerInstance->Time(), true), Utils(Util)
{
}
bool CacheRefreshTimer::Tick(time_t TIME)
{
Utils->RefreshIPCache();
return true;
}
|
