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
|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2009 InspIRCd Development Team
* See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
/* $Core */
#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)
{
UserResolver *res_forward; // for forward-resolution
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 lcached = false;
#ifdef IPV6
if (this->bound_user->client_sa.sa.sa_family == AF_INET6)
{
/* IPV6 forward lookup */
res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_AAAA, lcached);
}
else
/* IPV4 lookup (mixed protocol mode) */
#endif
{
/* IPV4 lookup (ipv4 only mode) */
res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, lcached);
}
this->ServerInstance->AddResolver(res_forward, lcached);
}
}
catch (CoreException& e)
{
ServerInstance->Logs->Log("RESOLVER", DEBUG,"Error in resolver: %s",e.GetReason());
}
}
else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
{
/* Both lookups completed */
irc::sockets::sockaddrs* user_ip = &this->bound_user->client_sa;
bool rev_match = false;
#ifdef IPV6
if (user_ip->sa.sa_family == AF_INET6)
{
struct in6_addr res_bin;
if (inet_pton(AF_INET6, result.c_str(), &res_bin))
{
rev_match = !memcmp(&user_ip->in6.sin6_addr, &res_bin, sizeof(res_bin));
}
}
else
#endif
{
struct in_addr res_bin;
if (inet_pton(AF_INET, result.c_str(), &res_bin))
{
rev_match = !memcmp(&user_ip->in4.sin_addr, &res_bin, sizeof(res_bin));
}
}
if (rev_match)
{
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[0] == ':')
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;
this->bound_user->dhost.assign(hostname, 0, 64);
this->bound_user->host.assign(hostname, 0, 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;
}
}
// Save some memory by freeing this up; it's never used again in the user's lifetime.
this->bound_user->stored_host.resize(0);
}
}
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;
this->bound_user->stored_host.resize(0);
ServerInstance->stats->statsDnsBad++;
}
}
|
