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/*
* (C) 2003-2014 Anope Team
* Contact us at team@anope.org
*
* Please read COPYING and README for further details.
*/
#include "module.h"
#include "modules/dns.h"
using namespace DNS;
static ServiceReference<XLineManager> akills("XLineManager", "xlinemanager/sgline");
static ServiceReference<Manager> dnsmanager("DNS::Manager", "dns/manager");
struct Blacklist
{
Anope::string name;
time_t bantime;
Anope::string reason;
std::map<int, Anope::string> replies;
Blacklist(const Anope::string &n, time_t b, const Anope::string &r, const std::map<int, Anope::string> &re) : name(n), bantime(b), reason(r), replies(re) { }
};
class DNSBLResolver : public Request
{
Reference<User> user;
Blacklist blacklist;
bool add_to_akill;
public:
DNSBLResolver(Module *c, User *u, const Blacklist &b, const Anope::string &host, bool add_akill) : Request(dnsmanager, c, host, QUERY_A, true), user(u), blacklist(b), add_to_akill(add_akill) { }
void OnLookupComplete(const Query *record) anope_override
{
if (!user || user->Quitting())
return;
const ResourceRecord &ans_record = record->answers[0];
// Replies should be in 127.0.0.0/24
if (ans_record.rdata.find("127.0.0.") != 0)
return;
Anope::string record_reason;
if (!this->blacklist.replies.empty())
{
sockaddrs sresult;
sresult.pton(AF_INET, ans_record.rdata);
int result = sresult.sa4.sin_addr.s_addr >> 24;
if (!this->blacklist.replies.count(result))
return;
record_reason = this->blacklist.replies[result];
}
Anope::string reason = this->blacklist.reason;
reason = reason.replace_all_cs("%n", user->nick);
reason = reason.replace_all_cs("%u", user->GetIdent());
reason = reason.replace_all_cs("%g", user->realname);
reason = reason.replace_all_cs("%h", user->host);
reason = reason.replace_all_cs("%i", user->ip);
reason = reason.replace_all_cs("%r", record_reason);
reason = reason.replace_all_cs("%N", Config->GetBlock("networkinfo")->Get<const Anope::string>("networkname"));
BotInfo *OperServ = Config->GetClient("OperServ");
Log(creator, "dnsbl", OperServ) << user->GetMask() << " (" << user->ip << ") appears in " << this->blacklist.name;
XLine *x = new XLine("*@" + user->ip, OperServ ? OperServ->nick : "m_dnsbl", Anope::CurTime + this->blacklist.bantime, reason, XLineManager::GenerateUID());
if (this->add_to_akill && akills)
{
akills->AddXLine(x);
akills->Send(NULL, x);
}
else
{
IRCD->SendAkill(NULL, x);
delete x;
}
}
};
class ModuleDNSBL : public Module
{
std::vector<Blacklist> blacklists;
bool check_on_connect;
bool check_on_netburst;
bool add_to_akill;
public:
ModuleDNSBL(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, VENDOR | EXTRA)
{
}
void OnReload(Configuration::Conf *conf) anope_override
{
Configuration::Block *block = conf->GetModule(this);
this->check_on_connect = block->Get<bool>("check_on_connect");
this->check_on_netburst = block->Get<bool>("check_on_netburst");
this->add_to_akill = block->Get<bool>("add_to_akill", "yes");
this->blacklists.clear();
for (int i = 0, num = block->CountBlock("blacklist"); i < num; ++i)
{
Configuration::Block *bl = block->GetBlock("blacklist", i);
Anope::string bname = bl->Get<const Anope::string>("name");
if (bname.empty())
continue;
time_t bantime = bl->Get<time_t>("time", "4h");
Anope::string reason = bl->Get<const Anope::string>("reason");
std::map<int, Anope::string> replies;
for (int j = 0; j < 256; ++j)
{
Anope::string k = bl->Get<const Anope::string>(stringify(j));
if (!k.empty())
replies[j] = k;
}
this->blacklists.push_back(Blacklist(bname, bantime, reason, replies));
}
}
void OnUserConnect(User *user, bool &exempt) anope_override
{
if (exempt || user->Quitting() || (!this->check_on_connect && !Me->IsSynced()) || !dnsmanager)
return;
if (!this->check_on_netburst && !user->server->IsSynced())
return;
/* At this time we only support IPv4 */
sockaddrs user_ip;
user_ip.pton(AF_INET, user->ip);
if (!user_ip.valid())
/* User doesn't have a valid IPv4 IP (ipv6/spoof/etc) */
return;
const unsigned long &ip = user_ip.sa4.sin_addr.s_addr;
unsigned long reverse_ip = (ip << 24) | ((ip & 0xFF00) << 8) | ((ip & 0xFF0000) >> 8) | (ip >> 24);
user_ip.sa4.sin_addr.s_addr = reverse_ip;
for (unsigned i = 0; i < this->blacklists.size(); ++i)
{
const Blacklist &b = this->blacklists[i];
Anope::string dnsbl_host = user_ip.addr() + "." + b.name;
DNSBLResolver *res = NULL;
try
{
res = new DNSBLResolver(this, user, b, dnsbl_host, this->add_to_akill);
dnsmanager->Process(res);
}
catch (const SocketException &ex)
{
delete res;
Log(this) << ex.GetReason();
}
}
}
};
MODULE_INIT(ModuleDNSBL)
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