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/*
* (C) 2003-2011 Anope Team
* Contact us at team@anope.org
*
* Please read COPYING and README for further details.
*/
#include "module.h"
struct FakeAkill : public Command
{
FakeAkill() : Command("AKILL", 0, 0) { this->service = OperServ; }
CommandReturn Execute(CommandSource &, const std::vector<Anope::string> &) { return MOD_CONT; }
} fake_akill;
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 DNSRequest
{
dynamic_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) : DNSRequest(host, DNS_QUERY_A, true, c), user(u), blacklist(b), add_to_akill(add_akill) { }
void OnLookupComplete(const DNSRecord *record)
{
if (!user || user->GetExt("m_dnsbl_akilled"))
return;
Anope::string record_reason;
if (!this->blacklist.replies.empty())
{
sockaddrs sresult;
sresult.pton(AF_INET, record->result);
int result = (sresult.sa4.sin_addr.s_addr & 0xFF000000) >> 24;
if (!this->blacklist.replies.count(result))
return;
record_reason = this->blacklist.replies[result];
}
user->Extend("m_dnsbl_akilled");
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.addr());
reason = reason.replace_all_cs("%r", record_reason);
reason = reason.replace_all_cs("%N", Config->NetworkName);
XLine *x = NULL;
if (this->add_to_akill && SGLine && (x = SGLine->Add(NULL, NULL, Anope::string("*@") + user->host, Anope::CurTime + this->blacklist.bantime, reason)))
{
Log(LOG_COMMAND, OperServ, &fake_akill) << "for " << user->GetMask() << " (Listed in " << this->blacklist.name << ")";
/* If AkillOnAdd is disabled send it anyway, noone wants bots around... */
if (!Config->AkillOnAdd)
ircdproto->SendAkill(*user, x);
}
else
{
Log(OperServ) << "DNSBL: " << user->GetMask() << " appears in " << this->blacklist.name;
XLine xline(Anope::string("*@") + user->host, OperServ ? OperServ->nick : "OperServ", Anope::CurTime + this->blacklist.bantime, reason);
ircdproto->SendAkill(*user, &xline);
}
}
};
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)
{
this->SetAuthor("Anope");
this->SetType(SUPPORTED);
OnReload(false);
Implementation i[] = { I_OnReload, I_OnPreUserConnect };
ModuleManager::Attach(i, this, 2);
}
void OnReload(bool)
{
ConfigReader config;
this->check_on_connect = config.ReadFlag("m_dnsbl", "check_on_connect", "no", 0);
this->check_on_netburst = config.ReadFlag("m_dnsbl", "check_on_netburst", "no", 0);
this->add_to_akill = config.ReadFlag("m_dnsbl", "add_to_akill", "yes", 0);
this->blacklists.clear();
for (int i = 0, num = config.Enumerate("blacklist"); i < num; ++i)
{
Anope::string bname = config.ReadValue("blacklist", "name", "", i);
if (bname.empty())
continue;
Anope::string sbantime = config.ReadValue("blacklist", "time", "4h", i);
time_t bantime = dotime(sbantime);
if (bantime < 0)
bantime = 9000;
Anope::string reason = config.ReadValue("blacklist", "reason", "", i);
std::map<int, Anope::string> replies;
for (int j = 0; j < 256; ++j)
{
Anope::string k = config.ReadValue("blacklist", stringify(j), "", i);
if (!k.empty())
replies[j] = k;
}
this->blacklists.push_back(Blacklist(bname, bantime, reason, replies));
}
}
EventReturn OnPreUserConnect(User *u)
{
if (!this->check_on_connect && !Me->IsSynced())
return EVENT_CONTINUE;
if (!this->check_on_netburst && !u->server->IsSynced())
return EVENT_CONTINUE;
/* At this time we only support IPv4 */
if (u->ip.sa.sa_family != AF_INET)
return EVENT_CONTINUE;
unsigned long ip = u->ip.sa4.sin_addr.s_addr;
unsigned long reverse_ip = ((ip & 0xFF) << 24) | ((ip & 0xFF00) << 8) | ((ip & 0xFF0000) >> 8) | ((ip & 0xFF000000) >> 24);
sockaddrs user_ip;
user_ip.sa4.sin_family = AF_INET;
user_ip.sa4.sin_addr.s_addr = reverse_ip;
for (unsigned i = 0; i < this->blacklists.size(); ++i)
{
const Blacklist &b = this->blacklists[i];
try
{
Anope::string dnsbl_host = user_ip.addr() + "." + b.name;
DNSBLResolver *res = new DNSBLResolver(this, u, b, dnsbl_host, this->add_to_akill);
res->Process();
}
catch (const SocketException &ex)
{
Log() << "m_dnsbl: " << ex.GetReason();
}
}
return EVENT_CONTINUE;
}
};
MODULE_INIT(ModuleDNSBL)
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