1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2009 InspIRCd Development Team
6 * See: http://wiki.inspircd.org/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
17 UserResolver::UserResolver(InspIRCd* Instance, User* user, std::string to_resolve, QueryType qt, bool &cache) :
18 Resolver(Instance, to_resolve, qt, cache), bound_user(user)
20 this->fwd = (qt == DNS_QUERY_A || qt == DNS_QUERY_AAAA);
21 this->bound_fd = user->GetFd();
24 void UserResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached)
26 UserResolver *res_forward; // for forward-resolution
28 if ((!this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
30 this->bound_user->stored_host = result;
33 /* Check we didnt time out */
34 if (this->bound_user->registered != REG_ALL)
38 if (this->bound_user->GetProtocolFamily() == AF_INET6)
40 /* IPV6 forward lookup (with possibility of 4in6) */
41 const char* ip = this->bound_user->GetIPString();
42 res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, (!strncmp(ip, "0::ffff:", 8) ? DNS_QUERY_A : DNS_QUERY_AAAA), lcached);
45 /* IPV4 lookup (mixed protocol mode) */
48 /* IPV4 lookup (ipv4 only mode) */
49 res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, lcached);
51 this->ServerInstance->AddResolver(res_forward, lcached);
54 catch (CoreException& e)
56 ServerInstance->Logs->Log("RESOLVER", DEBUG,"Error in resolver: %s",e.GetReason());
59 else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
61 /* Both lookups completed */
63 sockaddr* user_ip = this->bound_user->ip;
64 bool rev_match = false;
66 if (user_ip->sa_family == AF_INET6)
68 struct in6_addr res_bin;
69 if (inet_pton(AF_INET6, result.c_str(), &res_bin))
71 sockaddr_in6* user_ip6 = reinterpret_cast<sockaddr_in6*>(user_ip);
72 rev_match = !memcmp(&user_ip6->sin6_addr, &res_bin, sizeof(res_bin));
78 struct in_addr res_bin;
79 if (inet_pton(AF_INET, result.c_str(), &res_bin))
81 sockaddr_in* user_ip4 = reinterpret_cast<sockaddr_in*>(user_ip);
82 rev_match = !memcmp(&user_ip4->sin_addr, &res_bin, sizeof(res_bin));
88 std::string hostname = this->bound_user->stored_host;
89 if (hostname.length() < 65)
91 /* Check we didnt time out */
92 if ((this->bound_user->registered != REG_ALL) && (!this->bound_user->dns_done))
94 /* Hostnames starting with : are not a good thing (tm) */
95 if (hostname[0] == ':')
96 hostname.insert(0, "0");
98 this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)%s", hostname.c_str(), (cached ? " -- cached" : ""));
99 this->bound_user->dns_done = true;
100 this->bound_user->dhost.assign(hostname, 0, 64);
101 this->bound_user->host.assign(hostname, 0, 64);
102 /* Invalidate cache */
103 this->bound_user->InvalidateCache();
108 if (!this->bound_user->dns_done)
110 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());
111 this->bound_user->dns_done = true;
117 if (!this->bound_user->dns_done)
119 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());
120 this->bound_user->dns_done = true;
124 // Save some memory by freeing this up; it's never used again in the user's lifetime.
125 this->bound_user->stored_host.resize(0);
129 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
131 if (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user)
133 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());
134 this->bound_user->dns_done = true;
135 this->bound_user->stored_host.resize(0);
136 ServerInstance->stats->statsDnsBad++;