/*
* InspIRCd -- Internet Relay Chat Daemon
*
+ * Copyright (C) 2018-2020 Matt Schatz <genius3000@g3k.solutions>
+ * Copyright (C) 2018-2019 linuxdaemon <linuxdaemon.irc@gmail.com>
+ * Copyright (C) 2013, 2016-2020 Sadie Powell <sadie@witchery.services>
+ * Copyright (C) 2013, 2015-2016 Adam <Adam@anope.org>
+ * Copyright (C) 2012-2016 Attila Molnar <attilamolnar@hush.com>
+ * Copyright (C) 2012, 2018 Robby <robby@chatbelgie.be>
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
- * Copyright (C) 2006-2008 Robin Burchell <robin+git@viroteck.net>
- * Copyright (C) 2007 Craig Edwards <craigedwards@brainbox.cc>
- * Copyright (C) 2006-2007 Dennis Friis <peavey@inspircd.org>
- * Copyright (C) 2007 John Brooks <john.brooks@dereferenced.net>
+ * Copyright (C) 2007, 2010 Craig Edwards <brain@inspircd.org>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ * Copyright (C) 2006-2009 Robin Burchell <robin+git@viroteck.net>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
#include "inspircd.h"
#include "xline.h"
#include "modules/dns.h"
+#include "modules/stats.h"
/* Class holding data for a single entry */
class DNSBLConfEntry : public refcountbase
std::string name, ident, host, domain, reason;
EnumBanaction banaction;
EnumType type;
- long duration;
- int bitmask;
+ unsigned long duration;
+ unsigned int bitmask;
unsigned char records[256];
unsigned long stats_hits, stats_misses;
DNSBLConfEntry(): type(A_BITMASK),duration(86400),bitmask(0),stats_hits(0), stats_misses(0) {}
};
-/** Resolver for CGI:IRC hostnames encoded in ident/GECOS
+/** Resolver for CGI:IRC hostnames encoded in ident/real name
*/
class DNSBLResolver : public DNS::Request
{
+ private:
+ irc::sockets::sockaddrs theirsa;
std::string theiruid;
LocalStringExt& nameExt;
LocalIntExt& countExt;
reference<DNSBLConfEntry> ConfEntry;
public:
-
DNSBLResolver(DNS::Manager *mgr, Module *me, LocalStringExt& match, LocalIntExt& ctr, const std::string &hostname, LocalUser* u, reference<DNSBLConfEntry> conf)
- : DNS::Request(mgr, me, hostname, DNS::QUERY_A, true), theiruid(u->uuid), nameExt(match), countExt(ctr), ConfEntry(conf)
+ : DNS::Request(mgr, me, hostname, DNS::QUERY_A, true)
+ , theirsa(u->client_sa)
+ , theiruid(u->uuid)
+ , nameExt(match)
+ , countExt(ctr)
+ , ConfEntry(conf)
{
}
void OnLookupComplete(const DNS::Query *r) CXX11_OVERRIDE
{
/* Check the user still exists */
- LocalUser* them = (LocalUser*)ServerInstance->FindUUID(theiruid);
- if (!them)
+ LocalUser* them = IS_LOCAL(ServerInstance->FindUUID(theiruid));
+ if (!them || them->client_sa != theirsa)
return;
const DNS::ResourceRecord* const ans_record = r->FindAnswerOfType(DNS::QUERY_A);
// All replies should be in 127.0.0.0/8
if (ans_record->rdata.compare(0, 4, "127.") != 0)
{
- ServerInstance->SNO->WriteGlobalSno('a', "DNSBL: %s returned address outside of acceptable subnet 127.0.0.0/8: %s", ConfEntry->domain.c_str(), ans_record->rdata.c_str());
+ ServerInstance->SNO->WriteGlobalSno('d', "DNSBL: %s returned address outside of acceptable subnet 127.0.0.0/8: %s", ConfEntry->domain.c_str(), ans_record->rdata.c_str());
ConfEntry->stats_misses++;
return;
}
bool match = false;
in_addr resultip;
- inet_aton(ans_record->rdata.c_str(), &resultip);
+ inet_pton(AF_INET, ans_record->rdata.c_str(), &resultip);
switch (ConfEntry->type)
{
{
if (!ConfEntry->ident.empty())
{
- them->WriteNumeric(304, "Your ident has been set to " + ConfEntry->ident + " because you matched " + reason);
+ them->WriteNotice("Your ident has been set to " + ConfEntry->ident + " because you matched " + reason);
them->ChangeIdent(ConfEntry->ident);
}
if (!ConfEntry->host.empty())
{
- them->WriteNumeric(304, "Your host has been set to " + ConfEntry->host + " because you matched " + reason);
+ them->WriteNotice("Your host has been set to " + ConfEntry->host + " because you matched " + reason);
them->ChangeDisplayedHost(ConfEntry->host);
}
"*", them->GetIPString());
if (ServerInstance->XLines->AddLine(kl,NULL))
{
- std::string timestr = InspIRCd::TimeString(kl->expiry);
- ServerInstance->SNO->WriteGlobalSno('x',"K:line added due to DNSBL match on *@%s to expire on %s: %s",
- them->GetIPString().c_str(), timestr.c_str(), reason.c_str());
+ ServerInstance->SNO->WriteToSnoMask('x', "K-line added due to DNSBL match on *@%s to expire in %s (on %s): %s",
+ them->GetIPString().c_str(), InspIRCd::DurationString(kl->duration).c_str(),
+ InspIRCd::TimeString(kl->expiry).c_str(), reason.c_str());
ServerInstance->XLines->ApplyLines();
}
else
"*", them->GetIPString());
if (ServerInstance->XLines->AddLine(gl,NULL))
{
- std::string timestr = InspIRCd::TimeString(gl->expiry);
- ServerInstance->SNO->WriteGlobalSno('x',"G:line added due to DNSBL match on *@%s to expire on %s: %s",
- them->GetIPString().c_str(), timestr.c_str(), reason.c_str());
+ ServerInstance->SNO->WriteToSnoMask('x', "G-line added due to DNSBL match on *@%s to expire in %s (on %s): %s",
+ them->GetIPString().c_str(), InspIRCd::DurationString(gl->duration).c_str(),
+ InspIRCd::TimeString(gl->expiry).c_str(), reason.c_str());
ServerInstance->XLines->ApplyLines();
}
else
them->GetIPString());
if (ServerInstance->XLines->AddLine(zl,NULL))
{
- std::string timestr = InspIRCd::TimeString(zl->expiry);
- ServerInstance->SNO->WriteGlobalSno('x',"Z:line added due to DNSBL match on %s to expire on %s: %s",
- them->GetIPString().c_str(), timestr.c_str(), reason.c_str());
+ ServerInstance->SNO->WriteToSnoMask('x', "Z-line added due to DNSBL match on %s to expire in %s (on %s): %s",
+ them->GetIPString().c_str(), InspIRCd::DurationString(zl->duration).c_str(),
+ InspIRCd::TimeString(zl->expiry).c_str(), reason.c_str());
ServerInstance->XLines->ApplyLines();
}
else
break;
}
- ServerInstance->SNO->WriteGlobalSno('a', "Connecting user %s%s detected as being on a DNS blacklist (%s) with result %d", them->nick.empty() ? "<unknown>" : "", them->GetFullRealHost().c_str(), ConfEntry->domain.c_str(), (ConfEntry->type==DNSBLConfEntry::A_BITMASK) ? bitmask : record);
+ ServerInstance->SNO->WriteGlobalSno('d', "Connecting user %s (%s) detected as being on the '%s' DNS blacklist with result %d",
+ them->GetFullRealHost().c_str(), them->GetIPString().c_str(), ConfEntry->name.c_str(), (ConfEntry->type==DNSBLConfEntry::A_BITMASK) ? bitmask : record);
}
else
ConfEntry->stats_misses++;
void OnError(const DNS::Query *q) CXX11_OVERRIDE
{
- LocalUser* them = (LocalUser*)ServerInstance->FindUUID(theiruid);
- if (!them)
+ LocalUser* them = IS_LOCAL(ServerInstance->FindUUID(theiruid));
+ if (!them || them->client_sa != theirsa)
return;
int i = countExt.get(them);
countExt.set(them, i - 1);
if (q->error == DNS::ERROR_NO_RECORDS || q->error == DNS::ERROR_DOMAIN_NOT_FOUND)
+ {
ConfEntry->stats_misses++;
+ return;
+ }
+
+ ServerInstance->SNO->WriteGlobalSno('d', "An error occurred whilst checking whether %s (%s) is on the '%s' DNS blacklist: %s",
+ them->GetFullRealHost().c_str(), them->GetIPString().c_str(), ConfEntry->name.c_str(), this->manager->GetErrorStr(q->error).c_str());
}
};
-class ModuleDNSBL : public Module
+typedef std::vector<reference<DNSBLConfEntry> > DNSBLConfList;
+
+class ModuleDNSBL : public Module, public Stats::EventListener
{
- std::vector<reference<DNSBLConfEntry> > DNSBLConfEntries;
+ DNSBLConfList DNSBLConfEntries;
dynamic_reference<DNS::Manager> DNS;
LocalStringExt nameExt;
LocalIntExt countExt;
*/
DNSBLConfEntry::EnumBanaction str2banaction(const std::string &action)
{
- if(action.compare("KILL")==0)
+ if (stdalgo::string::equalsci(action, "kill"))
return DNSBLConfEntry::I_KILL;
- if(action.compare("KLINE")==0)
+ if (stdalgo::string::equalsci(action, "kline"))
return DNSBLConfEntry::I_KLINE;
- if(action.compare("ZLINE")==0)
+ if (stdalgo::string::equalsci(action, "zline"))
return DNSBLConfEntry::I_ZLINE;
- if(action.compare("GLINE")==0)
+ if (stdalgo::string::equalsci(action, "gline"))
return DNSBLConfEntry::I_GLINE;
- if(action.compare("MARK")==0)
+ if (stdalgo::string::equalsci(action, "mark"))
return DNSBLConfEntry::I_MARK;
-
return DNSBLConfEntry::I_UNKNOWN;
}
public:
ModuleDNSBL()
- : DNS(this, "DNS")
+ : Stats::EventListener(this)
+ , DNS(this, "DNS")
, nameExt("dnsbl_match", ExtensionItem::EXT_USER, this)
, countExt("dnsbl_pending", ExtensionItem::EXT_USER, this)
{
}
+ void init() CXX11_OVERRIDE
+ {
+ ServerInstance->SNO->EnableSnomask('d', "DNSBL");
+ }
+
+ void Prioritize() CXX11_OVERRIDE
+ {
+ Module* corexline = ServerInstance->Modules->Find("core_xline");
+ ServerInstance->Modules->SetPriority(this, I_OnSetUserIP, PRIORITY_AFTER, corexline);
+ }
+
Version GetVersion() CXX11_OVERRIDE
{
- return Version("Provides handling of DNS blacklists", VF_VENDOR);
+ return Version("Allows the server administrator to check the IP address of connecting users against a DNSBL.", VF_VENDOR);
}
/** Fill our conf vector with data
*/
void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
{
- DNSBLConfEntries.clear();
+ DNSBLConfList newentries;
ConfigTagList dnsbls = ServerInstance->Config->ConfTags("dnsbl");
for(ConfigIter i = dnsbls.first; i != dnsbls.second; ++i)
e->name = tag->getString("name");
e->ident = tag->getString("ident");
e->host = tag->getString("host");
- e->reason = tag->getString("reason");
+ e->reason = tag->getString("reason", "Your IP has been blacklisted.", 1);
e->domain = tag->getString("domain");
- if (tag->getString("type") == "bitmask")
+ if (stdalgo::string::equalsci(tag->getString("type"), "bitmask"))
{
e->type = DNSBLConfEntry::A_BITMASK;
- e->bitmask = tag->getInt("bitmask");
+ e->bitmask = tag->getUInt("bitmask", 0, 0, UINT_MAX);
}
else
{
/* yeah, logic here is a little messy */
if ((e->bitmask <= 0) && (DNSBLConfEntry::A_BITMASK == e->type))
{
- std::string location = tag->getTagLocation();
- ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): invalid bitmask", location.c_str());
+ throw ModuleException("Invalid <dnsbl:bitmask> at " + tag->getTagLocation());
}
else if (e->name.empty())
{
- std::string location = tag->getTagLocation();
- ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): Invalid name", location.c_str());
+ throw ModuleException("Empty <dnsbl:name> at " + tag->getTagLocation());
}
else if (e->domain.empty())
{
- std::string location = tag->getTagLocation();
- ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): Invalid domain", location.c_str());
+ throw ModuleException("Empty <dnsbl:domain> at " + tag->getTagLocation());
}
else if (e->banaction == DNSBLConfEntry::I_UNKNOWN)
{
- std::string location = tag->getTagLocation();
- ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): Invalid banaction", location.c_str());
+ throw ModuleException("Unknown <dnsbl:action> at " + tag->getTagLocation());
}
else
{
- if (e->reason.empty())
- {
- std::string location = tag->getTagLocation();
- ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): empty reason, using defaults", location.c_str());
- e->reason = "Your IP has been blacklisted.";
- }
-
/* add it, all is ok */
- DNSBLConfEntries.push_back(e);
+ newentries.push_back(e);
}
}
+
+ DNSBLConfEntries.swap(newentries);
}
void OnSetUserIP(LocalUser* user) CXX11_OVERRIDE
{
- if ((user->exempt) || !DNS)
+ if (user->exempt || user->quitting || !DNS)
+ return;
+
+ // Clients can't be in a DNSBL if they aren't connected via IPv4 or IPv6.
+ if (user->client_sa.family() != AF_INET && user->client_sa.family() != AF_INET6)
return;
if (user->MyClass)
return;
}
else
+ {
ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "User has no connect class in OnSetUserIP");
+ return;
+ }
std::string reversedip;
- if (user->client_sa.sa.sa_family == AF_INET)
+ if (user->client_sa.family() == AF_INET)
{
unsigned int a, b, c, d;
d = (unsigned int) (user->client_sa.in4.sin_addr.s_addr >> 24) & 0xFF;
reversedip = ConvToStr(d) + "." + ConvToStr(c) + "." + ConvToStr(b) + "." + ConvToStr(a);
}
- else if (user->client_sa.sa.sa_family == AF_INET6)
+ else if (user->client_sa.family() == AF_INET6)
{
const unsigned char* ip = user->client_sa.in6.sin6_addr.s6_addr;
reversedip.push_back(*it);
reversedip.push_back('.');
}
+ reversedip.erase(reversedip.length() - 1, 1);
}
else
return;
std::string dnsbl;
if (!myclass->config->readString("dnsbl", dnsbl))
return MOD_RES_PASSTHRU;
+
std::string* match = nameExt.get(user);
- std::string myname = match ? *match : "";
- if (dnsbl == myname)
- return MOD_RES_PASSTHRU;
- return MOD_RES_DENY;
+ if (!match)
+ {
+ ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "The %s connect class is not suitable as it requires a DNSBL mark",
+ myclass->GetName().c_str());
+ return MOD_RES_DENY;
+ }
+
+ if (!InspIRCd::Match(*match, dnsbl))
+ {
+ ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "The %s connect class is not suitable as the DNSBL mark (%s) does not match %s",
+ myclass->GetName().c_str(), match->c_str(), dnsbl.c_str());
+ return MOD_RES_DENY;
+ }
+
+ return MOD_RES_PASSTHRU;
}
ModResult OnCheckReady(LocalUser *user) CXX11_OVERRIDE
projects / user / henk / code / inspircd.git / blobdiff