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|
/* +------------------------------------+
* | 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, int resultnum)
{
/* We are only interested in the first matching result */
if (resultnum)
return;
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->GetProtocolFamily() == AF_INET6)
{
/* IPV6 forward lookup (with possibility of 4in6) */
const char* ip = this->bound_user->GetIPString();
res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, (!strncmp(ip, "0::ffff:", 8) ? DNS_QUERY_A : 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 */
sockaddr* user_ip = this->bound_user->ip;
bool rev_match = false;
#ifdef IPV6
if (user_ip->sa_family == AF_INET6)
{
struct in6_addr res_bin;
if (inet_pton(AF_INET6, result.c_str(), &res_bin))
{
sockaddr_in6* user_ip6 = reinterpret_cast<sockaddr_in6*>(user_ip);
rev_match = !memcmp(&user_ip6->sin6_addr, &res_bin, sizeof(res_bin));
}
}
else
#endif
{
struct in_addr res_bin;
if (inet_pton(AF_INET, result.c_str(), &res_bin))
{
sockaddr_in* user_ip4 = reinterpret_cast<sockaddr_in*>(user_ip);
rev_match = !memcmp(&user_ip4->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++;
}
}
|
