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
|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2008 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
/* $Core: libIRCDuserresolver */
#include "inspircd.h"
UserResolver::UserResolver(InspIRCd* Instance, User* user, std::string to_resolve, QueryType qt, bool &cache) :
Resolver(Instance, to_resolve, qt, cache), bound_user(user)
{
this->fwd = (qt == DNS_QUERY_A || qt == DNS_QUERY_AAAA);
this->bound_fd = user->GetFd();
}
void UserResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached, int resultnum)
{
/* We are only interested in the first matching result */
if (resultnum)
return;
if ((!this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
{
this->bound_user->stored_host = result;
try
{
/* Check we didnt time out */
if (this->bound_user->registered != REG_ALL)
{
bool cached;
#ifdef IPV6
if (this->bound_user->GetProtocolFamily() == AF_INET6)
{
/* IPV6 forward lookup (with possibility of 4in6) */
const char* ip = this->bound_user->GetIPString();
bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, (!strncmp(ip, "0::ffff:", 8) ? DNS_QUERY_A : DNS_QUERY_AAAA), cached);
}
else
/* IPV4 lookup (mixed protocol mode) */
#endif
/* IPV4 lookup (ipv4 only mode) */
bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, cached);
this->ServerInstance->AddResolver(bound_user->res_forward, cached);
}
}
catch (CoreException& e)
{
ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
}
}
else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
{
/* Both lookups completed */
std::string result2("0::ffff:");
result2.append(result);
if (this->bound_user->GetIPString() == result || this->bound_user->GetIPString() == result2)
{
std::string hostname = this->bound_user->stored_host;
if (hostname.length() < 65)
{
/* Check we didnt time out */
if ((this->bound_user->registered != REG_ALL) && (!this->bound_user->dns_done))
{
/* Hostnames starting with : are not a good thing (tm) */
if (*(hostname.c_str()) == ':')
hostname.insert(0, "0");
this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)%s", hostname.c_str(), (cached ? " -- cached" : ""));
this->bound_user->dns_done = true;
strlcpy(this->bound_user->dhost, hostname.c_str(),64);
strlcpy(this->bound_user->host, hostname.c_str(),64);
/* Invalidate cache */
this->bound_user->InvalidateCache();
}
}
else
{
if (!this->bound_user->dns_done)
{
this->bound_user->WriteServ("NOTICE Auth :*** Your hostname is longer than the maximum of 64 characters, using your IP address (%s) instead.", this->bound_user->GetIPString());
this->bound_user->dns_done = true;
}
}
}
else
{
if (!this->bound_user->dns_done)
{
this->bound_user->WriteServ("NOTICE Auth :*** Your hostname does not match up with your IP address. Sorry, using your IP address (%s) instead.", this->bound_user->GetIPString());
this->bound_user->dns_done = true;
}
}
}
}
void UserResolver::OnError(ResolverError e, const std::string &errormessage)
{
if (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user)
{
this->bound_user->WriteServ("NOTICE Auth :*** Could not resolve your hostname: %s; using your IP address (%s) instead.", errormessage.c_str(), this->bound_user->GetIPString());
this->bound_user->dns_done = true;
ServerInstance->stats->statsDnsBad++;
}
}
|
