Move modules out of extras that dont have external dependencies

1 files changed, 379 insertions, 0 deletions

diff --git a/modules/m_proxyscan.cpp b/modules/m_proxyscan.cpp
new file mode 100644
index 000000000..98178260c
--- /dev/null
+++ b/modules/m_proxyscan.cpp
@@ -0,0 +1,379 @@
+/*
+ * (C) 2003-2014 Anope Team
+ * Contact us at team@anope.org
+ *
+ * Please read COPYING and README for further details.
+ */
+
+#include "module.h"
+
+struct ProxyCheck
+{
+	std::set<Anope::string, ci::less> types;
+	std::vector<unsigned short> ports;
+	time_t duration;
+	Anope::string reason;
+};
+
+static Anope::string ProxyCheckString;
+static Anope::string target_ip;
+static unsigned short target_port;
+static bool add_to_akill;
+
+class ProxyCallbackListener : public ListenSocket
+{
+	class ProxyCallbackClient : public ClientSocket, public BufferedSocket
+	{
+	 public:
+		ProxyCallbackClient(ListenSocket *l, int f, const sockaddrs &a) : Socket(f, l->IsIPv6()), ClientSocket(l, a), BufferedSocket()
+		{
+		}
+
+		void OnAccept() anope_override
+		{
+			this->Write(ProxyCheckString);
+		}
+
+		bool ProcessWrite() anope_override
+		{
+			return !BufferedSocket::ProcessWrite() || this->write_buffer.empty() ? false : true;
+		}
+	};
+
+ public:
+	ProxyCallbackListener(const Anope::string &b, int p) : Socket(-1, b.find(':') != Anope::string::npos), ListenSocket(b, p, false)
+	{
+	}
+
+	ClientSocket *OnAccept(int fd, const sockaddrs &addr) anope_override
+	{
+		return new ProxyCallbackClient(this, fd, addr);
+	}
+};
+
+class ProxyConnect : public ConnectionSocket
+{
+	static ServiceReference<XLineManager> akills;
+
+ public:
+ 	static std::set<ProxyConnect *> proxies;
+
+ 	ProxyCheck proxy;
+	unsigned short port;
+ 	time_t created;
+
+	ProxyConnect(ProxyCheck &p, unsigned short po) : Socket(-1), ConnectionSocket(), proxy(p),
+		port(po), created(Anope::CurTime)
+	{
+		proxies.insert(this);
+	}
+
+	~ProxyConnect()
+	{
+		proxies.erase(this);
+	}
+
+	virtual void OnConnect() anope_override = 0;
+	virtual const Anope::string GetType() const = 0;
+
+ protected:
+	void Ban()
+	{
+		Anope::string reason = this->proxy.reason;
+
+		reason = reason.replace_all_cs("%t", this->GetType());
+		reason = reason.replace_all_cs("%i", this->conaddr.addr());
+		reason = reason.replace_all_cs("%p", stringify(this->conaddr.port()));
+
+		BotInfo *OperServ = Config->GetClient("OperServ");
+		Log(OperServ) << "PROXYSCAN: Open " << this->GetType() << " proxy found on " << this->conaddr.addr() << ":" << this->conaddr.port() << " (" << reason << ")";
+		XLine *x = new XLine("*@" + this->conaddr.addr(), OperServ ? OperServ->nick : "", Anope::CurTime + this->proxy.duration, reason, XLineManager::GenerateUID());
+		if (add_to_akill && akills)
+		{
+			akills->AddXLine(x);
+			akills->Send(NULL, x);
+		}
+		else
+		{
+			if (IRCD->CanSZLine)
+				IRCD->SendSZLine(NULL, x);
+			else
+				IRCD->SendAkill(NULL, x);
+			delete x;
+		}
+	}
+};
+ServiceReference<XLineManager> ProxyConnect::akills("XLineManager", "xlinemanager/sgline");
+std::set<ProxyConnect *> ProxyConnect::proxies;
+
+class HTTPProxyConnect : public ProxyConnect, public BufferedSocket
+{
+ public:
+	HTTPProxyConnect(ProxyCheck &p, unsigned short po) : Socket(-1), ProxyConnect(p, po), BufferedSocket()
+	{
+	}
+
+	void OnConnect() anope_override
+	{
+		this->Write("CONNECT %s:%d HTTP/1.0", target_ip.c_str(), target_port);
+		this->Write("Content-length: 0");
+		this->Write("Connection: close");
+		this->Write("");
+	}
+
+	const Anope::string GetType() const anope_override
+	{
+		return "HTTP";
+	}
+
+	bool ProcessRead() anope_override
+	{
+		bool b = BufferedSocket::ProcessRead();
+		if (this->GetLine() == ProxyCheckString)
+		{
+			this->Ban();
+			return false;
+		}
+		return b;
+	}
+};
+
+class SOCKS5ProxyConnect : public ProxyConnect, public BinarySocket
+{
+ public:
+	SOCKS5ProxyConnect(ProxyCheck &p, unsigned short po) : Socket(-1), ProxyConnect(p, po), BinarySocket()
+	{
+	}
+
+	void OnConnect() anope_override
+	{
+		sockaddrs target_addr;
+		char buf[4 + sizeof(target_addr.sa4.sin_addr.s_addr) + sizeof(target_addr.sa4.sin_port)];
+		int ptr = 0;
+		target_addr.pton(AF_INET, target_ip, target_port);
+		if (!target_addr.valid())
+			return;
+
+		buf[ptr++] = 5; // Version
+		buf[ptr++] = 1; // # of methods
+		buf[ptr++] = 0; // No authentication
+
+		this->Write(buf, ptr);
+
+		ptr = 1;
+		buf[ptr++] = 1; // Connect
+		buf[ptr++] = 0; // Reserved
+		buf[ptr++] = 1; // IPv4
+		memcpy(buf + ptr, &target_addr.sa4.sin_addr.s_addr, sizeof(target_addr.sa4.sin_addr.s_addr));
+		ptr += sizeof(target_addr.sa4.sin_addr.s_addr);
+		memcpy(buf + ptr, &target_addr.sa4.sin_port, sizeof(target_addr.sa4.sin_port));
+		ptr += sizeof(target_addr.sa4.sin_port);
+
+		this->Write(buf, ptr);
+	}
+
+	const Anope::string GetType() const anope_override
+	{
+		return "SOCKS5";
+	}
+
+	bool Read(const char *buffer, size_t l) anope_override
+	{
+		if (l >= ProxyCheckString.length() && !strncmp(buffer, ProxyCheckString.c_str(), ProxyCheckString.length()))
+		{
+			this->Ban();
+			return false;
+		}
+		return true;
+	}
+};
+
+class ModuleProxyScan : public Module
+{
+	Anope::string listen_ip;
+	unsigned short listen_port;
+	Anope::string con_notice, con_source;
+	std::vector<ProxyCheck> proxyscans;
+
+	ProxyCallbackListener *listener;
+
+	class ConnectionTimeout : public Timer
+	{
+	 public:
+		ConnectionTimeout(Module *c, long timeout) : Timer(c, timeout, Anope::CurTime, true)
+		{
+		}
+
+		void Tick(time_t) anope_override
+		{
+			for (std::set<ProxyConnect *>::iterator it = ProxyConnect::proxies.begin(), it_end = ProxyConnect::proxies.end(); it != it_end; ++it)
+			{
+				ProxyConnect *p = *it;
+
+				if (p->created + this->GetSecs() < Anope::CurTime)
+					p->flags[SF_DEAD] = true;
+			}
+		}
+	} connectionTimeout;
+
+ public:
+	ModuleProxyScan(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, EXTRA | VENDOR),
+		connectionTimeout(this, 5)
+	{
+
+
+		this->listener = NULL;
+	}
+
+	~ModuleProxyScan()
+	{
+		for (std::set<ProxyConnect *>::iterator it = ProxyConnect::proxies.begin(), it_end = ProxyConnect::proxies.end(); it != it_end;)
+		{
+			ProxyConnect *p = *it;
+			++it;
+			delete p;
+		}
+
+		for (std::map<int, Socket *>::const_iterator it = SocketEngine::Sockets.begin(), it_end = SocketEngine::Sockets.end(); it != it_end;)
+		{
+			Socket *s = it->second;
+			++it;
+
+			ClientSocket *cs = dynamic_cast<ClientSocket *>(s);
+			if (cs != NULL && cs->ls == this->listener)
+				delete s;
+		}
+
+		delete this->listener;
+	}
+
+	void OnReload(Configuration::Conf *conf) anope_override
+	{
+		Configuration::Block *config = Config->GetModule(this);
+
+		Anope::string s_target_ip = config->Get<const Anope::string>("target_ip");
+		if (s_target_ip.empty())
+			throw ConfigException(this->name + " target_ip may not be empty");
+
+		int s_target_port = config->Get<int>("target_port", "-1");
+		if (s_target_port <= 0)
+			throw ConfigException(this->name + " target_port may not be empty and must be a positive number");
+
+		Anope::string s_listen_ip = config->Get<const Anope::string>("listen_ip");
+		if (s_listen_ip.empty())
+			throw ConfigException(this->name + " listen_ip may not be empty");
+
+		int s_listen_port = config->Get<int>("listen_port", "-1");
+		if (s_listen_port <= 0)
+			throw ConfigException(this->name + " listen_port may not be empty and must be a positive number");
+
+		target_ip = s_target_ip;
+		target_port = s_target_port;
+		this->listen_ip = s_listen_ip;
+		this->listen_port = s_listen_port;
+		this->con_notice = config->Get<const Anope::string>("connect_notice");
+		this->con_source = config->Get<const Anope::string>("connect_source");
+		add_to_akill = config->Get<bool>("add_to_akill", "true");
+		this->connectionTimeout.SetSecs(config->Get<time_t>("timeout", "5s"));
+
+		ProxyCheckString = Config->GetBlock("networkinfo")->Get<const Anope::string>("networkname") + " proxy check";
+		delete this->listener;
+		this->listener = NULL;
+		try
+		{
+			this->listener = new ProxyCallbackListener(this->listen_ip, this->listen_port);
+		}
+		catch (const SocketException &ex)
+		{
+			throw ConfigException("m_proxyscan: " + ex.GetReason());
+		}
+
+		this->proxyscans.clear();
+		for (int i = 0; i < config->CountBlock("proxyscan"); ++i)
+		{
+			Configuration::Block *block = config->GetBlock("proxyscan", i);
+			ProxyCheck p;
+			Anope::string token;
+
+			commasepstream sep(block->Get<const Anope::string>("type"));
+			while (sep.GetToken(token))
+			{
+				if (!token.equals_ci("HTTP") && !token.equals_ci("SOCKS5"))
+					continue;
+				p.types.insert(token);
+			}
+			if (p.types.empty())
+				continue;
+
+			commasepstream sep2(block->Get<const Anope::string>("port"));
+			while (sep2.GetToken(token))
+			{
+				try
+				{
+					unsigned short port = convertTo<unsigned short>(token);
+					p.ports.push_back(port);
+				}
+				catch (const ConvertException &) { }
+			}
+			if (p.ports.empty())
+				continue;
+
+			p.duration = block->Get<time_t>("time", "4h");
+			p.reason = block->Get<const Anope::string>("reason");
+			if (p.reason.empty())
+				continue;
+
+			this->proxyscans.push_back(p);
+		}
+	}
+
+	void OnUserConnect(User *user, bool &exempt) anope_override
+	{
+		if (exempt || user->Quitting() || !Me->IsSynced() || !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;
+
+		if (!this->con_notice.empty() && !this->con_source.empty())
+		{
+			BotInfo *bi = BotInfo::Find(this->con_source);
+			if (bi)
+				user->SendMessage(bi, this->con_notice);
+		}
+
+		for (unsigned i = this->proxyscans.size(); i > 0; --i)
+		{
+			ProxyCheck &p = this->proxyscans[i - 1];
+
+			for (std::set<Anope::string, ci::less>::iterator it = p.types.begin(), it_end = p.types.end(); it != it_end; ++it)
+			{
+				for (unsigned k = 0; k < p.ports.size(); ++k)
+				{
+					try
+					{
+						ProxyConnect *con = NULL;
+						if (it->equals_ci("HTTP"))
+							con = new HTTPProxyConnect(p, p.ports[k]);
+						else if (it->equals_ci("SOCKS5"))
+							con = new SOCKS5ProxyConnect(p, p.ports[k]);
+						else
+							continue;
+						con->Connect(user->ip, p.ports[k]);
+					}
+					catch (const SocketException &ex)
+					{
+						Log(LOG_DEBUG) << "m_proxyscan: " << ex.GetReason();
+					}
+				}
+			}
+		}
+	}
+};
+
+MODULE_INIT(ModuleProxyScan)
+