#include "inspircd.h"
#include "xline.h"
-
-#ifndef WINDOWS
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#endif
-
-/* $ModDesc: Provides handling of DNS blacklists */
+#include "modules/dns.h"
/* Class holding data for a single entry */
-class DNSBLConfEntry
+class DNSBLConfEntry : public refcountbase
{
public:
enum EnumBanaction { I_UNKNOWN, I_KILL, I_ZLINE, I_KLINE, I_GLINE, I_MARK };
unsigned char records[256];
unsigned long stats_hits, stats_misses;
DNSBLConfEntry(): type(A_BITMASK),duration(86400),bitmask(0),stats_hits(0), stats_misses(0) {}
- ~DNSBLConfEntry() { }
};
/** Resolver for CGI:IRC hostnames encoded in ident/GECOS
*/
-class DNSBLResolver : public Resolver
+class DNSBLResolver : public DNS::Request
{
std::string theiruid;
LocalStringExt& nameExt;
LocalIntExt& countExt;
- DNSBLConfEntry *ConfEntry;
+ reference<DNSBLConfEntry> ConfEntry;
public:
- DNSBLResolver(Module *me, LocalStringExt& match, LocalIntExt& ctr, const std::string &hostname, LocalUser* u, DNSBLConfEntry *conf, bool &cached)
- : Resolver(hostname, DNS_QUERY_A, cached, me), theiruid(u->uuid), nameExt(match), countExt(ctr), ConfEntry(conf)
+ 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)
{
}
/* Note: This may be called multiple times for multiple A record results */
- virtual void OnLookupComplete(const std::string &result, unsigned int ttl, bool cached)
+ void OnLookupComplete(const DNS::Query *r) CXX11_OVERRIDE
{
/* Check the user still exists */
LocalUser* them = (LocalUser*)ServerInstance->FindUUID(theiruid);
- if (them)
+ if (!them)
+ return;
+
+ const DNS::ResourceRecord &ans_record = r->answers[0];
+
+ int i = countExt.get(them);
+ if (i)
+ countExt.set(them, i - 1);
+
+ // Now we calculate the bitmask: 256*(256*(256*a+b)+c)+d
+
+ unsigned int bitmask = 0, record = 0;
+ bool match = false;
+ in_addr resultip;
+
+ inet_aton(ans_record.rdata.c_str(), &resultip);
+
+ switch (ConfEntry->type)
+ {
+ case DNSBLConfEntry::A_BITMASK:
+ bitmask = resultip.s_addr >> 24; /* Last octet (network byte order) */
+ bitmask &= ConfEntry->bitmask;
+ match = (bitmask != 0);
+ break;
+ case DNSBLConfEntry::A_RECORD:
+ record = resultip.s_addr >> 24; /* Last octet */
+ match = (ConfEntry->records[record] == 1);
+ break;
+ }
+
+ if (match)
{
- int i = countExt.get(them);
- if (i)
- countExt.set(them, i - 1);
- // Now we calculate the bitmask: 256*(256*(256*a+b)+c)+d
- if(result.length())
+ std::string reason = ConfEntry->reason;
+ std::string::size_type x = reason.find("%ip%");
+ while (x != std::string::npos)
{
- unsigned int bitmask = 0, record = 0;
- bool match = false;
- in_addr resultip;
+ reason.erase(x, 4);
+ reason.insert(x, them->GetIPString());
+ x = reason.find("%ip%");
+ }
- inet_aton(result.c_str(), &resultip);
+ ConfEntry->stats_hits++;
- switch (ConfEntry->type)
+ switch (ConfEntry->banaction)
+ {
+ case DNSBLConfEntry::I_KILL:
{
- case DNSBLConfEntry::A_BITMASK:
- bitmask = resultip.s_addr >> 24; /* Last octet (network byte order) */
- bitmask &= ConfEntry->bitmask;
- match = (bitmask != 0);
- break;
- case DNSBLConfEntry::A_RECORD:
- record = resultip.s_addr >> 24; /* Last octet */
- match = (ConfEntry->records[record] == 1);
+ ServerInstance->Users->QuitUser(them, "Killed (" + reason + ")");
break;
}
-
- if (match)
+ case DNSBLConfEntry::I_MARK:
{
- std::string reason = ConfEntry->reason;
- std::string::size_type x = reason.find("%ip%");
- while (x != std::string::npos)
+ if (!ConfEntry->ident.empty())
{
- reason.erase(x, 4);
- reason.insert(x, them->GetIPString());
- x = reason.find("%ip%");
+ them->WriteNumeric(304, "Your ident has been set to " + ConfEntry->ident + " because you matched " + reason);
+ them->ChangeIdent(ConfEntry->ident);
}
- ConfEntry->stats_hits++;
-
- switch (ConfEntry->banaction)
+ if (!ConfEntry->host.empty())
{
- case DNSBLConfEntry::I_KILL:
- {
- ServerInstance->Users->QuitUser(them, std::string("Killed (") + reason + ")");
- break;
- }
- case DNSBLConfEntry::I_MARK:
- {
- if (!ConfEntry->ident.empty())
- {
- them->WriteServ("304 " + them->nick + " :Your ident has been set to " + ConfEntry->ident + " because you matched " + reason);
- them->ChangeIdent(ConfEntry->ident.c_str());
- }
-
- if (!ConfEntry->host.empty())
- {
- them->WriteServ("304 " + them->nick + " :Your host has been set to " + ConfEntry->host + " because you matched " + reason);
- them->ChangeDisplayedHost(ConfEntry->host.c_str());
- }
-
- nameExt.set(them, ConfEntry->name);
- break;
- }
- case DNSBLConfEntry::I_KLINE:
- {
- KLine* kl = new KLine(ServerInstance->Time(), ConfEntry->duration, ServerInstance->Config->ServerName.c_str(), reason.c_str(),
- "*", them->GetIPString());
- if (ServerInstance->XLines->AddLine(kl,NULL))
- {
- ServerInstance->SNO->WriteGlobalSno('x',"K:line added due to DNSBL match on *@%s to expire on %s: %s",
- them->GetIPString(), ServerInstance->TimeString(kl->expiry).c_str(), reason.c_str());
- ServerInstance->XLines->ApplyLines();
- }
- else
- delete kl;
- break;
- }
- case DNSBLConfEntry::I_GLINE:
- {
- GLine* gl = new GLine(ServerInstance->Time(), ConfEntry->duration, ServerInstance->Config->ServerName.c_str(), reason.c_str(),
- "*", them->GetIPString());
- if (ServerInstance->XLines->AddLine(gl,NULL))
- {
- ServerInstance->SNO->WriteGlobalSno('x',"G:line added due to DNSBL match on *@%s to expire on %s: %s",
- them->GetIPString(), ServerInstance->TimeString(gl->expiry).c_str(), reason.c_str());
- ServerInstance->XLines->ApplyLines();
- }
- else
- delete gl;
- break;
- }
- case DNSBLConfEntry::I_ZLINE:
- {
- ZLine* zl = new ZLine(ServerInstance->Time(), ConfEntry->duration, ServerInstance->Config->ServerName.c_str(), reason.c_str(),
- them->GetIPString());
- if (ServerInstance->XLines->AddLine(zl,NULL))
- {
- ServerInstance->SNO->WriteGlobalSno('x',"Z:line added due to DNSBL match on *@%s to expire on %s: %s",
- them->GetIPString(), ServerInstance->TimeString(zl->expiry).c_str(), reason.c_str());
- ServerInstance->XLines->ApplyLines();
- }
- else
- delete zl;
- break;
- }
- case DNSBLConfEntry::I_UNKNOWN:
- {
- break;
- }
- break;
+ them->WriteNumeric(304, "Your host has been set to " + ConfEntry->host + " because you matched " + reason);
+ them->ChangeDisplayedHost(ConfEntry->host);
}
- 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);
+ nameExt.set(them, ConfEntry->name);
+ break;
+ }
+ case DNSBLConfEntry::I_KLINE:
+ {
+ KLine* kl = new KLine(ServerInstance->Time(), ConfEntry->duration, ServerInstance->Config->ServerName.c_str(), reason.c_str(),
+ "*", 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->XLines->ApplyLines();
+ }
+ else
+ {
+ delete kl;
+ return;
+ }
+ break;
+ }
+ case DNSBLConfEntry::I_GLINE:
+ {
+ GLine* gl = new GLine(ServerInstance->Time(), ConfEntry->duration, ServerInstance->Config->ServerName.c_str(), reason.c_str(),
+ "*", 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->XLines->ApplyLines();
+ }
+ else
+ {
+ delete gl;
+ return;
+ }
+ break;
+ }
+ case DNSBLConfEntry::I_ZLINE:
+ {
+ ZLine* zl = new ZLine(ServerInstance->Time(), ConfEntry->duration, ServerInstance->Config->ServerName.c_str(), reason.c_str(),
+ 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->XLines->ApplyLines();
+ }
+ else
+ {
+ delete zl;
+ return;
+ }
+ break;
}
- else
- ConfEntry->stats_misses++;
+ case DNSBLConfEntry::I_UNKNOWN:
+ default:
+ break;
}
- else
- ConfEntry->stats_misses++;
+
+ 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);
}
+ else
+ ConfEntry->stats_misses++;
}
- virtual void OnError(ResolverError e, const std::string &errormessage)
+ void OnError(const DNS::Query *q) CXX11_OVERRIDE
{
LocalUser* them = (LocalUser*)ServerInstance->FindUUID(theiruid);
- if (them)
- {
- int i = countExt.get(them);
- if (i)
- countExt.set(them, i - 1);
- }
- }
+ if (!them)
+ return;
- virtual ~DNSBLResolver()
- {
+ int i = countExt.get(them);
+ if (i)
+ countExt.set(them, i - 1);
+
+ if (q->error == DNS::ERROR_NO_RECORDS || q->error == DNS::ERROR_DOMAIN_NOT_FOUND)
+ ConfEntry->stats_misses++;
}
};
class ModuleDNSBL : public Module
{
- std::vector<DNSBLConfEntry *> DNSBLConfEntries;
+ std::vector<reference<DNSBLConfEntry> > DNSBLConfEntries;
+ dynamic_reference<DNS::Manager> DNS;
LocalStringExt nameExt;
LocalIntExt countExt;
return DNSBLConfEntry::I_UNKNOWN;
}
public:
- ModuleDNSBL() : nameExt("dnsbl_match", this), countExt("dnsbl_pending", this) { }
-
- void init()
- {
- ReadConf();
- ServerInstance->Modules->AddService(nameExt);
- ServerInstance->Modules->AddService(countExt);
- Implementation eventlist[] = { I_OnRehash, I_OnSetUserIP, I_OnStats, I_OnSetConnectClass, I_OnCheckReady };
- ServerInstance->Modules->Attach(eventlist, this, 5);
- }
-
- virtual ~ModuleDNSBL()
+ ModuleDNSBL()
+ : DNS(this, "DNS")
+ , nameExt("dnsbl_match", ExtensionItem::EXT_USER, this)
+ , countExt("dnsbl_pending", ExtensionItem::EXT_USER, this)
{
- ClearEntries();
}
- Version GetVersion()
+ Version GetVersion() CXX11_OVERRIDE
{
return Version("Provides handling of DNS blacklists", VF_VENDOR);
}
- /** Clear entries and free the mem it was using
- */
- void ClearEntries()
- {
- for (std::vector<DNSBLConfEntry *>::iterator i = DNSBLConfEntries.begin(); i != DNSBLConfEntries.end(); i++)
- delete *i;
- DNSBLConfEntries.clear();
- }
-
/** Fill our conf vector with data
*/
- void ReadConf()
+ void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
{
- ClearEntries();
+ DNSBLConfEntries.clear();
ConfigTagList dnsbls = ServerInstance->Config->ConfTags("dnsbl");
for(ConfigIter i = dnsbls.first; i != dnsbls.second; ++i)
{
ConfigTag* tag = i->second;
- DNSBLConfEntry *e = new DNSBLConfEntry();
+ reference<DNSBLConfEntry> e = new DNSBLConfEntry();
e->name = tag->getString("name");
e->ident = tag->getString("ident");
}
e->banaction = str2banaction(tag->getString("action"));
- e->duration = ServerInstance->Duration(tag->getString("duration", "60"));
+ e->duration = tag->getDuration("duration", 60, 1);
/* Use portparser for record replies */
/* yeah, logic here is a little messy */
if ((e->bitmask <= 0) && (DNSBLConfEntry::A_BITMASK == e->type))
{
- ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): invalid bitmask",tag->getTagLocation().c_str());
+ std::string location = tag->getTagLocation();
+ ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): invalid bitmask", location.c_str());
}
else if (e->name.empty())
{
- ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): Invalid name",tag->getTagLocation().c_str());
+ std::string location = tag->getTagLocation();
+ ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): Invalid name", location.c_str());
}
else if (e->domain.empty())
{
- ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): Invalid domain",tag->getTagLocation().c_str());
+ std::string location = tag->getTagLocation();
+ ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): Invalid domain", location.c_str());
}
else if (e->banaction == DNSBLConfEntry::I_UNKNOWN)
{
- ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): Invalid banaction",tag->getTagLocation().c_str());
- }
- else if (e->duration <= 0)
- {
- ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): Invalid duration",tag->getTagLocation().c_str());
+ std::string location = tag->getTagLocation();
+ ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): Invalid banaction", location.c_str());
}
else
{
if (e->reason.empty())
{
- ServerInstance->SNO->WriteGlobalSno('a', "DNSBL(%s): empty reason, using defaults",tag->getTagLocation().c_str());
+ 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);
- continue;
}
-
- /* delete and drop it, error somewhere */
- delete e;
}
}
- void OnRehash(User* user)
+ void OnSetUserIP(LocalUser* user) CXX11_OVERRIDE
{
- ReadConf();
- }
-
- void OnSetUserIP(LocalUser* user)
- {
- if (user->exempt)
+ if ((user->exempt) || !DNS)
return;
- unsigned char a, b, c, d;
- char reversedipbuf[128];
+ if (user->MyClass)
+ {
+ if (!user->MyClass->config->getBool("usednsbl", true))
+ return;
+ }
+ else
+ ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "User has no connect class in OnSetUserIP");
+
std::string reversedip;
+ if (user->client_sa.sa.sa_family == AF_INET)
+ {
+ unsigned int a, b, c, d;
+ d = (unsigned int) (user->client_sa.in4.sin_addr.s_addr >> 24) & 0xFF;
+ c = (unsigned int) (user->client_sa.in4.sin_addr.s_addr >> 16) & 0xFF;
+ b = (unsigned int) (user->client_sa.in4.sin_addr.s_addr >> 8) & 0xFF;
+ a = (unsigned int) user->client_sa.in4.sin_addr.s_addr & 0xFF;
+
+ reversedip = ConvToStr(d) + "." + ConvToStr(c) + "." + ConvToStr(b) + "." + ConvToStr(a);
+ }
+ else if (user->client_sa.sa.sa_family == AF_INET6)
+ {
+ const unsigned char* ip = user->client_sa.in6.sin6_addr.s6_addr;
- if (user->client_sa.sa.sa_family != AF_INET)
+ std::string buf = BinToHex(ip, 16);
+ for (std::string::const_reverse_iterator it = buf.rbegin(); it != buf.rend(); ++it)
+ {
+ reversedip.push_back(*it);
+ reversedip.push_back('.');
+ }
+ }
+ else
return;
- d = (unsigned char) (user->client_sa.in4.sin_addr.s_addr >> 24) & 0xFF;
- c = (unsigned char) (user->client_sa.in4.sin_addr.s_addr >> 16) & 0xFF;
- b = (unsigned char) (user->client_sa.in4.sin_addr.s_addr >> 8) & 0xFF;
- a = (unsigned char) user->client_sa.in4.sin_addr.s_addr & 0xFF;
+ ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Reversed IP %s -> %s", user->GetIPString().c_str(), reversedip.c_str());
- snprintf(reversedipbuf, 128, "%d.%d.%d.%d", d, c, b, a);
- reversedip = std::string(reversedipbuf);
+ countExt.set(user, DNSBLConfEntries.size());
// For each DNSBL, we will run through this lookup
- unsigned int i = 0;
- while (i < DNSBLConfEntries.size())
+ for (unsigned i = 0; i < DNSBLConfEntries.size(); ++i)
{
// Fill hostname with a dnsbl style host (d.c.b.a.domain.tld)
std::string hostname = reversedip + "." + DNSBLConfEntries[i]->domain;
/* now we'd need to fire off lookups for `hostname'. */
- bool cached;
- DNSBLResolver *r = new DNSBLResolver(this, nameExt, countExt, hostname, user, DNSBLConfEntries[i], cached);
- ServerInstance->AddResolver(r, cached);
- i++;
+ DNSBLResolver *r = new DNSBLResolver(*this->DNS, this, nameExt, countExt, hostname, user, DNSBLConfEntries[i]);
+ try
+ {
+ this->DNS->Process(r);
+ }
+ catch (DNS::Exception &ex)
+ {
+ delete r;
+ ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, ex.GetReason());
+ }
+
+ if (user->quitting)
+ break;
}
- countExt.set(user, i);
}
- ModResult OnSetConnectClass(LocalUser* user, ConnectClass* myclass)
+ ModResult OnSetConnectClass(LocalUser* user, ConnectClass* myclass) CXX11_OVERRIDE
{
std::string dnsbl;
if (!myclass->config->readString("dnsbl", dnsbl))
return MOD_RES_PASSTHRU;
return MOD_RES_DENY;
}
-
- ModResult OnCheckReady(LocalUser *user)
+
+ ModResult OnCheckReady(LocalUser *user) CXX11_OVERRIDE
{
if (countExt.get(user))
return MOD_RES_DENY;
return MOD_RES_PASSTHRU;
}
- ModResult OnStats(char symbol, User* user, string_list &results)
+ ModResult OnStats(char symbol, User* user, string_list &results) CXX11_OVERRIDE
{
if (symbol != 'd')
return MOD_RES_PASSTHRU;
unsigned long total_hits = 0, total_misses = 0;
- for (std::vector<DNSBLConfEntry*>::iterator i = DNSBLConfEntries.begin(); i != DNSBLConfEntries.end(); i++)
+ for (std::vector<reference<DNSBLConfEntry> >::const_iterator i = DNSBLConfEntries.begin(); i != DNSBLConfEntries.end(); ++i)
{
total_hits += (*i)->stats_hits;
total_misses += (*i)->stats_misses;
- results.push_back(std::string(ServerInstance->Config->ServerName.c_str()) + " 304 " + user->nick + " :DNSBLSTATS DNSbl \"" + (*i)->name + "\" had " +
+ results.push_back("304 " + user->nick + " :DNSBLSTATS DNSbl \"" + (*i)->name + "\" had " +
ConvToStr((*i)->stats_hits) + " hits and " + ConvToStr((*i)->stats_misses) + " misses");
}
- results.push_back(std::string(ServerInstance->Config->ServerName.c_str()) + " 304 " + user->nick + " :DNSBLSTATS Total hits: " + ConvToStr(total_hits));
- results.push_back(std::string(ServerInstance->Config->ServerName.c_str()) + " 304 " + user->nick + " :DNSBLSTATS Total misses: " + ConvToStr(total_misses));
+ results.push_back("304 " + user->nick + " :DNSBLSTATS Total hits: " + ConvToStr(total_hits));
+ results.push_back("304 " + user->nick + " :DNSBLSTATS Total misses: " + ConvToStr(total_misses));
return MOD_RES_PASSTHRU;
}
projects / user / henk / code / inspircd.git / blobdiff