mirror of
https://github.com/anope/anope.git
synced 2026-06-12 17:04:47 +02:00
Sadie Powell
976 lines
24 KiB
C++
976 lines
24 KiB
C++
// Anope IRC Services <https://www.anope.org/>
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//
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// Copyright (C) 2003-2026 Anope Contributors
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//
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// Anope is free software. You can use, modify, and/or distribute it under the
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// terms of version 2 of the GNU General Public License. See docs/LICENSE.txt
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// for the complete terms of this license and docs/AUTHORS.txt for a list of
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// contributors.
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//
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// Based on the original code of Epona by Lara
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// Based on the original code of Services by Andy Church
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//
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// SPDX-License-Identifier: GPL-2.0-only
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#include "module.h"
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#include "modules/dns.h"
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static ServiceReference<DNS::Manager> dnsmanager("DNS::Manager", "dns/manager");
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struct DNSZone;
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class DNSServer;
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static Serialize::Checker<std::vector<DNSZone *> > zones("DNSZone");
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static Serialize::Checker<std::vector<DNSServer *> > dns_servers("DNSServer");
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static std::map<Anope::string, std::list<time_t> > server_quit_times;
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struct DNSZone final
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: Serializable
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{
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Anope::string name;
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std::set<Anope::string, ci::less> servers;
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DNSZone(const Anope::string &n) : Serializable("DNSZone"), name(n)
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{
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zones->push_back(this);
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}
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~DNSZone() override
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{
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auto it = std::find(zones->begin(), zones->end(), this);
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if (it != zones->end())
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zones->erase(it);
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}
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static DNSZone *Find(const Anope::string &name)
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{
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for (auto *zone : *zones)
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{
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if (zone->name.equals_ci(name))
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{
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zone->QueueUpdate();
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return zone;
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}
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}
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return NULL;
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}
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};
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struct DNSZoneType final
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: Serialize::Type
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{
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DNSZoneType()
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: Serialize::Type("DNSZone")
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{
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}
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void Serialize(Serializable *obj, Serialize::Data &data) const override
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{
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const auto *zone = static_cast<const DNSZone *>(obj);
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data.Store("name", zone->name);
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unsigned count = 0;
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for (const auto &server : zone->servers)
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data.Store("server" + Anope::ToString(count++), server);
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}
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Serializable *Unserialize(Serializable *obj, Serialize::Data &data) const override
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{
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DNSZone *zone;
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Anope::string zone_name;
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zone_name = data.Load("name");
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if (obj)
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{
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zone = anope_dynamic_static_cast<DNSZone *>(obj);
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zone->name = data.Load("name");
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}
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else
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zone = new DNSZone(zone_name);
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zone->servers.clear();
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for (unsigned count = 0; true; ++count)
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{
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const auto server_str = data.Load(Anope::Format("server%u", count));
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if (server_str.empty())
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break;
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zone->servers.insert(server_str);
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}
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return zone;
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}
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};
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class DNSServer final
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: public Serializable
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{
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Anope::string server_name;
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std::vector<Anope::string> ips;
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unsigned limit = 0;
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/* wants to be in the pool */
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bool pooled = false;
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/* is actually in the pool */
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bool active = false;
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public:
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friend struct DNSServerType;
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std::set<Anope::string, ci::less> zones;
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time_t repool = 0;
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DNSServer(const Anope::string &sn) : Serializable("DNSServer"), server_name(sn)
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{
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dns_servers->push_back(this);
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}
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~DNSServer() override
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{
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auto it = std::find(dns_servers->begin(), dns_servers->end(), this);
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if (it != dns_servers->end())
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dns_servers->erase(it);
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}
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const Anope::string &GetName() const { return server_name; }
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std::vector<Anope::string> &GetIPs() { return ips; }
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unsigned GetLimit() const { return limit; }
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void SetLimit(unsigned l) { limit = l; }
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bool Pooled() const { return pooled; }
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void Pool(bool p)
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{
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if (!p)
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this->SetActive(p);
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pooled = p;
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}
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bool Active() const { return pooled && active; }
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void SetActive(bool p)
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{
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if (p)
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this->Pool(p);
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active = p;
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if (dnsmanager)
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{
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dnsmanager->UpdateSerial();
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for (const auto &zone : zones)
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dnsmanager->Notify(zone);
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}
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}
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static DNSServer *Find(const Anope::string &s)
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{
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for (auto *serv : *dns_servers)
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if (serv->GetName().equals_ci(s))
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{
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serv->QueueUpdate();
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return serv;
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}
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return NULL;
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}
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};
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struct DNSServerType final
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: Serialize::Type
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{
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DNSServerType()
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: Serialize::Type("DNSServer")
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{
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}
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void Serialize(Serializable *obj, Serialize::Data &data) const override
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{
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const auto *req = static_cast<const DNSServer *>(obj);
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data.Store("server_name", req->server_name);
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for (unsigned i = 0; i < req->ips.size(); ++i)
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data.Store("ip" + Anope::ToString(i), req->ips[i]);
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data.Store("limit", req->limit);
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data.Store("pooled", req->pooled);
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unsigned count = 0;
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for (const auto &zone : req->zones)
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data.Store("zone" + Anope::ToString(count++), zone);
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}
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Serializable *Unserialize(Serializable *obj, Serialize::Data &data) const override
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{
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const auto server_name = data.Load("server_name");
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DNSServer *req;
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if (obj)
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{
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req = anope_dynamic_static_cast<DNSServer *>(obj);
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req->server_name = server_name;
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}
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else
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req = new DNSServer(server_name);
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for (unsigned i = 0; true; ++i)
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{
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const auto ip_str = data.Load(Anope::Format("ip%u", i));
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if (ip_str.empty())
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break;
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req->ips.push_back(ip_str);
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}
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req->limit = data.Load<unsigned>("limit");
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req->pooled = data.Load<bool>("pooled");
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req->zones.clear();
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for (unsigned i = 0; true; ++i)
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{
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const auto zone_str = data.Load(Anope::Format("zone%u", i));
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if (zone_str.empty())
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break;
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req->zones.insert(zone_str);
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}
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return req;
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}
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};
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class CommandOSDNS final
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: public Command
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{
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static void DisplayPoolState(CommandSource &source)
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{
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if (dns_servers->empty())
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{
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source.Reply(_("There are no configured servers."));
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return;
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}
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ListFormatter lf(source.GetAccount());
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lf.AddColumn(_("Server")).AddColumn(_("IP")).AddColumn(_("Limit")).AddColumn(_("State"));
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lf.SetFlexible(_("Server: \002{server}\002 = {ip} -- limit: {limit}; state: {state}"));
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for (auto *s : *dns_servers)
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{
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Server *srv = Server::Find(s->GetName(), true);
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ListFormatter::ListEntry entry;
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entry["Server"] = s->GetName();
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entry["Limit"] = s->GetLimit() ? Anope::ToString(s->GetLimit()) : Language::Translate(source.GetAccount(), _("None"));
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Anope::string ip_str;
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for (const auto &ip : s->GetIPs())
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ip_str += ip + " ";
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ip_str.trim();
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if (ip_str.empty())
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ip_str = "None";
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entry["IP"] = ip_str;
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if (s->Active())
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entry["State"] = Language::Translate(source.GetAccount(), _("Pooled/Active"));
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else if (s->Pooled())
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entry["State"] = Language::Translate(source.GetAccount(), _("Pooled/Not Active"));
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else
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entry["State"] = Language::Translate(source.GetAccount(), _("Unpooled"));
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if (!srv)
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entry["State"] += Anope::string(" ") + Language::Translate(source.GetAccount(), _("(Split)"));
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lf.AddEntry(entry);
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}
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lf.SendTo(source);
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if (!zones->empty())
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{
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ListFormatter lf2(source.GetAccount());
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lf2.AddColumn(_("Zone")).AddColumn(_("Servers"));
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lf2.SetFlexible([](ListFormatter::ListEntry &row)
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{
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return row["Servers"].equals_cs("None")
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? _("Zone: \002{zone}\002")
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: _("Zone: \002{zone}\002 = {servers}");
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});
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for (auto *z : *zones)
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{
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ListFormatter::ListEntry entry;
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entry["Zone"] = z->name;
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Anope::string server_str;
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for (const auto &server : z->servers)
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server_str += server + " ";
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server_str.trim();
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if (server_str.empty())
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server_str = "None";
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entry["Servers"] = server_str;
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lf2.AddEntry(entry);
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}
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lf2.SendTo(source);
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}
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}
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void AddZone(CommandSource &source, const std::vector<Anope::string> ¶ms)
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{
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const Anope::string &zone = params[1];
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if (DNSZone::Find(zone))
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{
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source.Reply(_("Zone %s already exists."), zone.c_str());
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return;
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}
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if (Anope::ReadOnly)
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source.Reply(READ_ONLY_MODE);
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Log(LOG_ADMIN, source, this) << "to add zone " << zone;
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new DNSZone(zone);
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source.Reply(_("Added zone %s."), zone.c_str());
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}
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void DelZone(CommandSource &source, const std::vector<Anope::string> ¶ms)
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{
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const Anope::string &zone = params[1];
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DNSZone *z = DNSZone::Find(zone);
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if (!z)
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{
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source.Reply(_("Zone %s does not exist."), zone.c_str());
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return;
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}
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if (Anope::ReadOnly)
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source.Reply(READ_ONLY_MODE);
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Log(LOG_ADMIN, source, this) << "to delete zone " << z->name;
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for (const auto &server : z->servers)
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{
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DNSServer *s = DNSServer::Find(server);
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if (s)
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s->zones.erase(z->name);
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}
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if (dnsmanager)
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{
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dnsmanager->UpdateSerial();
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dnsmanager->Notify(z->name);
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}
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source.Reply(_("Zone %s removed."), z->name.c_str());
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delete z;
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}
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void AddServer(CommandSource &source, const std::vector<Anope::string> ¶ms)
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{
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DNSServer *s = DNSServer::Find(params[1]);
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const Anope::string &zone = params.size() > 2 ? params[2] : "";
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if (s)
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{
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if (zone.empty())
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{
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source.Reply(_("Server %s already exists."), s->GetName().c_str());
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}
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else
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{
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DNSZone *z = DNSZone::Find(zone);
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if (!z)
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{
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source.Reply(_("Zone %s does not exist."), zone.c_str());
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return;
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}
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else if (z->servers.count(s->GetName()))
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{
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source.Reply(_("Server %s is already in zone %s."), s->GetName().c_str(), z->name.c_str());
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return;
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}
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if (Anope::ReadOnly)
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source.Reply(READ_ONLY_MODE);
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z->servers.insert(s->GetName());
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s->zones.insert(zone);
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if (dnsmanager)
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{
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dnsmanager->UpdateSerial();
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dnsmanager->Notify(zone);
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}
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Log(LOG_ADMIN, source, this) << "to add server " << s->GetName() << " to zone " << z->name;
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source.Reply(_("Server %s added to zone %s."), s->GetName().c_str(), z->name.c_str());
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}
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return;
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}
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Server *serv = Server::Find(params[1], true);
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if (!serv || serv == Me || serv->IsJuped())
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{
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source.Reply(_("Server %s is not linked to the network."), params[1].c_str());
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return;
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}
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s = new DNSServer(params[1]);
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if (zone.empty())
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{
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if (Anope::ReadOnly)
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source.Reply(READ_ONLY_MODE);
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Log(LOG_ADMIN, source, this) << "to add server " << s->GetName();
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source.Reply(_("Added server %s."), s->GetName().c_str());
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}
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else
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{
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DNSZone *z = DNSZone::Find(zone);
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if (!z)
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{
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source.Reply(_("Zone %s does not exist."), zone.c_str());
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delete s;
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return;
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}
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if (Anope::ReadOnly)
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source.Reply(READ_ONLY_MODE);
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Log(LOG_ADMIN, source, this) << "to add server " << s->GetName() << " to zone " << zone;
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z->servers.insert(s->GetName());
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s->zones.insert(z->name);
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if (dnsmanager)
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{
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dnsmanager->UpdateSerial();
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dnsmanager->Notify(z->name);
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}
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}
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}
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void DelServer(CommandSource &source, const std::vector<Anope::string> ¶ms)
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{
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DNSServer *s = DNSServer::Find(params[1]);
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const Anope::string &zone = params.size() > 2 ? params[2] : "";
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if (!s)
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{
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source.Reply(_("Server %s does not exist."), params[1].c_str());
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return;
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}
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else if (!zone.empty())
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{
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DNSZone *z = DNSZone::Find(zone);
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if (!z)
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{
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source.Reply(_("Zone %s does not exist."), zone.c_str());
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return;
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}
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else if (!z->servers.count(s->GetName()))
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{
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source.Reply(_("Server %s is not in zone %s."), s->GetName().c_str(), z->name.c_str());
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return;
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}
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if (Anope::ReadOnly)
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source.Reply(READ_ONLY_MODE);
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Log(LOG_ADMIN, source, this) << "to remove server " << s->GetName() << " from zone " << z->name;
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if (dnsmanager)
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{
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dnsmanager->UpdateSerial();
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dnsmanager->Notify(z->name);
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}
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z->servers.erase(s->GetName());
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s->zones.erase(z->name);
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source.Reply(_("Removed server %s from zone %s."), s->GetName().c_str(), z->name.c_str());
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return;
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}
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else if (Server::Find(s->GetName(), true))
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{
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source.Reply(_("Server %s must be quit before it can be deleted."), s->GetName().c_str());
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return;
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}
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for (const auto &zone : s->zones)
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{
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DNSZone *z = DNSZone::Find(zone);
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if (z)
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z->servers.erase(s->GetName());
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}
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if (Anope::ReadOnly)
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source.Reply(READ_ONLY_MODE);
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if (dnsmanager)
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dnsmanager->UpdateSerial();
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Log(LOG_ADMIN, source, this) << "to delete server " << s->GetName();
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source.Reply(_("Removed server %s."), s->GetName().c_str());
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delete s;
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}
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void AddIP(CommandSource &source, const std::vector<Anope::string> ¶ms)
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{
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DNSServer *s = DNSServer::Find(params[1]);
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if (!s)
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{
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source.Reply(_("Server %s does not exist."), params[1].c_str());
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return;
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}
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for (const auto &ip : s->GetIPs())
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{
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if (params[2].equals_ci(ip))
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{
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source.Reply(_("IP %s already exists for %s."), ip.c_str(), s->GetName().c_str());
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return;
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}
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}
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sockaddrs addr(params[2]);
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if (!addr.valid())
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{
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source.Reply(_("%s is not a valid IP address."), params[2].c_str());
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return;
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}
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if (Anope::ReadOnly)
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source.Reply(READ_ONLY_MODE);
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s->GetIPs().push_back(params[2]);
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source.Reply(_("Added IP %s to %s."), params[2].c_str(), s->GetName().c_str());
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Log(LOG_ADMIN, source, this) << "to add IP " << params[2] << " to " << s->GetName();
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if (s->Active() && dnsmanager)
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{
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dnsmanager->UpdateSerial();
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for (const auto &zone : s->zones)
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dnsmanager->Notify(zone);
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}
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}
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void DelIP(CommandSource &source, const std::vector<Anope::string> ¶ms)
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{
|
|
DNSServer *s = DNSServer::Find(params[1]);
|
|
|
|
if (!s)
|
|
{
|
|
source.Reply(_("Server %s does not exist."), params[1].c_str());
|
|
return;
|
|
}
|
|
|
|
if (Anope::ReadOnly)
|
|
source.Reply(READ_ONLY_MODE);
|
|
|
|
for (unsigned i = 0; i < s->GetIPs().size(); ++i)
|
|
if (params[2].equals_ci(s->GetIPs()[i]))
|
|
{
|
|
s->GetIPs().erase(s->GetIPs().begin() + i);
|
|
source.Reply(_("Removed IP %s from %s."), params[2].c_str(), s->GetName().c_str());
|
|
Log(LOG_ADMIN, source, this) << "to remove IP " << params[2] << " from " << s->GetName();
|
|
|
|
if (s->GetIPs().empty())
|
|
{
|
|
s->repool = 0;
|
|
s->Pool(false);
|
|
}
|
|
|
|
if (s->Active() && dnsmanager)
|
|
{
|
|
dnsmanager->UpdateSerial();
|
|
for (const auto &zone : s->zones)
|
|
dnsmanager->Notify(zone);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
source.Reply(_("IP %s does not exist for %s."), params[2].c_str(), s->GetName().c_str());
|
|
}
|
|
|
|
static void OnSet(CommandSource &source, const std::vector<Anope::string> ¶ms)
|
|
{
|
|
DNSServer *s = DNSServer::Find(params[1]);
|
|
|
|
if (!s)
|
|
{
|
|
source.Reply(_("Server %s does not exist."), params[1].c_str());
|
|
return;
|
|
}
|
|
|
|
if (Anope::ReadOnly)
|
|
source.Reply(READ_ONLY_MODE);
|
|
|
|
if (params[2].equals_ci("LIMIT"))
|
|
{
|
|
if (auto l = Anope::TryConvert<unsigned>(params[3]))
|
|
{
|
|
s->SetLimit(l.value());
|
|
if (s->GetLimit())
|
|
source.Reply(_("User limit for %s set to %d."), s->GetName().c_str(), s->GetLimit());
|
|
else
|
|
source.Reply(_("User limit for %s removed."), s->GetName().c_str());
|
|
}
|
|
else
|
|
{
|
|
source.Reply(_("Invalid value for LIMIT. Must be numerical."));
|
|
}
|
|
}
|
|
else
|
|
source.Reply(_("Unknown SET option."));
|
|
}
|
|
|
|
void OnPool(CommandSource &source, const std::vector<Anope::string> ¶ms)
|
|
{
|
|
DNSServer *s = DNSServer::Find(params[1]);
|
|
|
|
if (!s)
|
|
{
|
|
source.Reply(_("Server %s does not exist."), params[1].c_str());
|
|
return;
|
|
}
|
|
else if (!Server::Find(s->GetName(), true))
|
|
{
|
|
source.Reply(_("Server %s is not currently linked."), s->GetName().c_str());
|
|
return;
|
|
}
|
|
else if (s->Pooled())
|
|
{
|
|
source.Reply(_("Server %s is already pooled."), s->GetName().c_str());
|
|
return;
|
|
}
|
|
else if (s->GetIPs().empty())
|
|
{
|
|
source.Reply(_("Server %s has no configured IPs."), s->GetName().c_str());
|
|
return;
|
|
}
|
|
|
|
if (Anope::ReadOnly)
|
|
source.Reply(READ_ONLY_MODE);
|
|
|
|
s->SetActive(true);
|
|
|
|
source.Reply(_("Pooled %s."), s->GetName().c_str());
|
|
Log(LOG_ADMIN, source, this) << "to pool " << s->GetName();
|
|
}
|
|
|
|
|
|
void OnDepool(CommandSource &source, const std::vector<Anope::string> ¶ms)
|
|
{
|
|
DNSServer *s = DNSServer::Find(params[1]);
|
|
|
|
if (!s)
|
|
{
|
|
source.Reply(_("Server %s does not exist."), params[1].c_str());
|
|
return;
|
|
}
|
|
else if (!s->Pooled())
|
|
{
|
|
source.Reply(_("Server %s is not pooled."), s->GetName().c_str());
|
|
return;
|
|
}
|
|
|
|
if (Anope::ReadOnly)
|
|
source.Reply(READ_ONLY_MODE);
|
|
|
|
s->Pool(false);
|
|
|
|
source.Reply(_("Depooled %s."), s->GetName().c_str());
|
|
Log(LOG_ADMIN, source, this) << "to depool " << s->GetName();
|
|
}
|
|
|
|
public:
|
|
CommandOSDNS(Module *creator) : Command(creator, "operserv/dns", 0, 4)
|
|
{
|
|
this->SetDesc(_("Manage DNS zones for this network"));
|
|
this->SetSyntax(_("ADDZONE \037zone.name\037"));
|
|
this->SetSyntax(_("DELZONE \037zone.name\037"));
|
|
this->SetSyntax(_("ADDSERVER \037server.name\037 [\037zone.name\037]"));
|
|
this->SetSyntax(_("DELSERVER \037server.name\037 [\037zone.name\037]"));
|
|
this->SetSyntax(_("ADDIP \037server.name\037 \037ip\037"));
|
|
this->SetSyntax(_("DELIP \037server.name\037 \037ip\037"));
|
|
this->SetSyntax(_("SET \037server.name\037 \037option\037 \037value\037"));
|
|
this->SetSyntax(_("POOL \037server.name\037"));
|
|
this->SetSyntax(_("DEPOOL \037server.name\037"));
|
|
}
|
|
|
|
void Execute(CommandSource &source, const std::vector<Anope::string> ¶ms) override
|
|
{
|
|
if (params.empty())
|
|
this->DisplayPoolState(source);
|
|
else if (params[0].equals_ci("ADDZONE") && params.size() > 1)
|
|
this->AddZone(source, params);
|
|
else if (params[0].equals_ci("DELZONE") && params.size() > 1)
|
|
this->DelZone(source, params);
|
|
else if (params[0].equals_ci("ADDSERVER") && params.size() > 1)
|
|
this->AddServer(source, params);
|
|
else if (params[0].equals_ci("DELSERVER") && params.size() > 1)
|
|
this->DelServer(source, params);
|
|
else if (params[0].equals_ci("ADDIP") && params.size() > 2)
|
|
this->AddIP(source, params);
|
|
else if (params[0].equals_ci("DELIP") && params.size() > 2)
|
|
this->DelIP(source, params);
|
|
else if (params[0].equals_ci("SET") && params.size() > 3)
|
|
this->OnSet(source, params);
|
|
else if (params[0].equals_ci("POOL") && params.size() > 1)
|
|
this->OnPool(source, params);
|
|
else if (params[0].equals_ci("DEPOOL") && params.size() > 1)
|
|
this->OnDepool(source, params);
|
|
else
|
|
this->OnSyntaxError(source, "");
|
|
}
|
|
|
|
bool OnHelp(CommandSource &source, const Anope::string &subcommand) override
|
|
{
|
|
this->SendSyntax(source);
|
|
source.Reply(" ");
|
|
source.Reply(_(
|
|
"This command allows managing DNS zones used for controlling what servers users "
|
|
"are directed to when connecting. Omitting all parameters prints out the status of "
|
|
"the DNS zone."
|
|
"\n\n"
|
|
"\002ADDZONE\002 adds a zone, eg us.yournetwork.tld. Servers can then be added to this "
|
|
"zone with the \002ADDSERVER\002 command."
|
|
"\n\n"
|
|
"The \002ADDSERVER\002 command adds a server to the given zone. When a query is done, the "
|
|
"zone in question is served if it exists, else all servers in all zones are served. "
|
|
"A server may be in more than one zone."
|
|
"\n\n"
|
|
"The \002ADDIP\002 command associates an IP with a server."
|
|
"\n\n"
|
|
"The \002POOL\002 and \002DEPOOL\002 commands actually add and remove servers to their given zones."
|
|
));
|
|
return true;
|
|
}
|
|
};
|
|
|
|
class ModuleDNS final
|
|
: public Module
|
|
{
|
|
DNSZoneType zone_type;
|
|
DNSServerType dns_type;
|
|
CommandOSDNS commandosdns;
|
|
|
|
time_t ttl;
|
|
int user_drop_mark;
|
|
time_t user_drop_time;
|
|
time_t user_drop_readd_time;
|
|
bool remove_split_servers;
|
|
bool readd_connected_servers;
|
|
|
|
time_t last_warn = 0;
|
|
|
|
public:
|
|
ModuleDNS(const Anope::string &modname, const Anope::string &creator)
|
|
: Module(modname, creator, EXTRA | VENDOR)
|
|
, commandosdns(this)
|
|
{
|
|
for (auto *s : *dns_servers)
|
|
{
|
|
if (s->Pooled() && Server::Find(s->GetName(), true))
|
|
s->SetActive(true);
|
|
}
|
|
}
|
|
|
|
~ModuleDNS() override
|
|
{
|
|
for (unsigned i = zones->size(); i > 0; --i)
|
|
delete zones->at(i - 1);
|
|
for (unsigned i = dns_servers->size(); i > 0; --i)
|
|
delete dns_servers->at(i - 1);
|
|
}
|
|
|
|
void OnReload(Configuration::Conf &conf) override
|
|
{
|
|
const auto &block = conf.GetModule(this);
|
|
this->ttl = block.Get<time_t>("ttl");
|
|
this->user_drop_mark = block.Get<int>("user_drop_mark");
|
|
this->user_drop_time = block.Get<time_t>("user_drop_time");
|
|
this->user_drop_readd_time = block.Get<time_t>("user_drop_readd_time");
|
|
this->remove_split_servers = block.Get<bool>("remove_split_servers");
|
|
this->readd_connected_servers = block.Get<bool>("readd_connected_servers");
|
|
}
|
|
|
|
void OnNewServer(Server *s) override
|
|
{
|
|
if (s == Me || s->IsJuped())
|
|
return;
|
|
if (!Me->IsSynced() || this->readd_connected_servers)
|
|
{
|
|
DNSServer *dns = DNSServer::Find(s->GetName());
|
|
if (dns && dns->Pooled() && !dns->Active() && !dns->GetIPs().empty())
|
|
{
|
|
dns->SetActive(true);
|
|
Log(this) << "Pooling server " << s->GetName();
|
|
}
|
|
}
|
|
}
|
|
|
|
void OnServerQuit(Server *s) override
|
|
{
|
|
DNSServer *dns = DNSServer::Find(s->GetName());
|
|
if (remove_split_servers && dns && dns->Pooled() && dns->Active())
|
|
{
|
|
if (readd_connected_servers)
|
|
dns->SetActive(false); // Will be reactivated when it comes back
|
|
else
|
|
dns->Pool(false); // Otherwise permanently pull this
|
|
Log(this) << "Depooling delinked server " << s->GetName();
|
|
}
|
|
}
|
|
|
|
void OnUserConnect(User *u, bool &exempt) override
|
|
{
|
|
if (!u->Quitting() && u->server)
|
|
{
|
|
DNSServer *s = DNSServer::Find(u->server->GetName());
|
|
/* Check for user limit reached */
|
|
if (s && s->Pooled() && s->Active() && s->GetLimit() && u->server->users >= s->GetLimit())
|
|
{
|
|
Log(this) << "Depooling full server " << s->GetName() << ": " << u->server->users << " users";
|
|
s->SetActive(false);
|
|
}
|
|
}
|
|
}
|
|
|
|
void OnPreUserLogoff(User *u) override
|
|
{
|
|
if (u && u->server)
|
|
{
|
|
DNSServer *s = DNSServer::Find(u->server->GetName());
|
|
if (!s || !s->Pooled())
|
|
return;
|
|
|
|
/* Check for dropping under userlimit */
|
|
if (s->GetLimit() && !s->Active() && s->GetLimit() > u->server->users)
|
|
{
|
|
Log(this) << "Pooling server " << s->GetName();
|
|
s->SetActive(true);
|
|
}
|
|
|
|
if (this->user_drop_mark > 0)
|
|
{
|
|
std::list<time_t>& times = server_quit_times[u->server->GetName()];
|
|
times.push_back(Anope::CurTime);
|
|
if (times.size() > static_cast<unsigned>(this->user_drop_mark))
|
|
times.pop_front();
|
|
|
|
if (times.size() == static_cast<unsigned>(this->user_drop_mark))
|
|
{
|
|
time_t diff = Anope::CurTime - *times.begin();
|
|
|
|
/* Check for very fast user drops */
|
|
if (s->Active() && diff <= this->user_drop_time)
|
|
{
|
|
Log(this) << "Depooling server " << s->GetName() << ": dropped " << this->user_drop_mark << " users in " << diff << " seconds";
|
|
s->repool = Anope::CurTime + this->user_drop_readd_time;
|
|
s->SetActive(false);
|
|
}
|
|
/* Check for needing to re-pool a server that dropped users */
|
|
else if (!s->Active() && s->repool && s->repool <= Anope::CurTime)
|
|
{
|
|
s->SetActive(true);
|
|
s->repool = 0;
|
|
Log(this) << "Pooling server " << s->GetName();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void OnDnsRequest(DNS::Query &req, DNS::Query *packet) override
|
|
{
|
|
if (req.questions.empty())
|
|
return;
|
|
/* Currently we reply to any QR for A/AAAA */
|
|
const DNS::Question &q = req.questions[0];
|
|
if (q.type != DNS::QUERY_A && q.type != DNS::QUERY_AAAA && q.type != DNS::QUERY_AXFR && q.type != DNS::QUERY_ANY)
|
|
return;
|
|
|
|
DNSZone *zone = DNSZone::Find(q.name);
|
|
size_t answer_size = packet->answers.size();
|
|
if (zone)
|
|
{
|
|
for (const auto &server : zone->servers)
|
|
{
|
|
DNSServer *s = DNSServer::Find(server);
|
|
if (!s || !s->Active())
|
|
continue;
|
|
|
|
for (const auto &ip : s->GetIPs())
|
|
{
|
|
DNS::QueryType q_type = ip.find(':') != Anope::string::npos ? DNS::QUERY_AAAA : DNS::QUERY_A;
|
|
|
|
if (q.type == DNS::QUERY_AXFR || q.type == DNS::QUERY_ANY || q_type == q.type)
|
|
{
|
|
DNS::ResourceRecord rr(q.name, q_type);
|
|
rr.ttl = this->ttl;
|
|
rr.rdata = ip;
|
|
packet->answers.push_back(rr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (packet->answers.size() == answer_size)
|
|
{
|
|
/* Default zone */
|
|
for (auto *s : *dns_servers)
|
|
{
|
|
if (!s->Active())
|
|
continue;
|
|
|
|
for (const auto &ip : s->GetIPs())
|
|
{
|
|
DNS::QueryType q_type = ip.find(':') != Anope::string::npos ? DNS::QUERY_AAAA : DNS::QUERY_A;
|
|
|
|
if (q.type == DNS::QUERY_AXFR || q.type == DNS::QUERY_ANY || q_type == q.type)
|
|
{
|
|
DNS::ResourceRecord rr(q.name, q_type);
|
|
rr.ttl = this->ttl;
|
|
rr.rdata = ip;
|
|
packet->answers.push_back(rr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (packet->answers.size() == answer_size)
|
|
{
|
|
if (last_warn + 60 < Anope::CurTime)
|
|
{
|
|
last_warn = Anope::CurTime;
|
|
Log(this) << "Warning! There are no pooled servers!";
|
|
}
|
|
|
|
/* Something messed up, just return them all and hope one is available */
|
|
for (auto *s : *dns_servers)
|
|
{
|
|
for (const auto &ip : s->GetIPs())
|
|
{
|
|
DNS::QueryType q_type = ip.find(':') != Anope::string::npos ? DNS::QUERY_AAAA : DNS::QUERY_A;
|
|
|
|
if (q.type == DNS::QUERY_AXFR || q.type == DNS::QUERY_ANY || q_type == q.type)
|
|
{
|
|
DNS::ResourceRecord rr(q.name, q_type);
|
|
rr.ttl = this->ttl;
|
|
rr.rdata = ip;
|
|
packet->answers.push_back(rr);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (packet->answers.size() == answer_size)
|
|
{
|
|
Log(this) << "Error! There are no servers with any IPs of type " << q.type;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
MODULE_INIT(ModuleDNS)
|