--- /dev/null
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/*
+ * Author : Maxim Mamontov <faust@stargazer.dp.ua>
+ */
+
+#include "conn.h"
+
+#include "radius.h"
+#include "config.h"
+
+#include "stg/json_parser.h"
+#include "stg/json_generator.h"
+#include "stg/users.h"
+#include "stg/user.h"
+#include "stg/logger.h"
+#include "stg/common.h"
+
+#include <yajl/yajl_gen.h>
+
+#include <map>
+#include <stdexcept>
+#include <cstring>
+#include <cerrno>
+
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+using STG::Conn;
+using STG::Config;
+using STG::JSON::Parser;
+using STG::JSON::PairsParser;
+using STG::JSON::EnumParser;
+using STG::JSON::NodeParser;
+using STG::JSON::Gen;
+using STG::JSON::MapGen;
+using STG::JSON::StringGen;
+
+namespace
+{
+
+double CONN_TIMEOUT = 60;
+double PING_TIMEOUT = 10;
+
+enum Packet
+{
+ PING,
+ PONG,
+ DATA
+};
+
+enum Stage
+{
+ AUTHORIZE,
+ AUTHENTICATE,
+ PREACCT,
+ ACCOUNTING,
+ POSTAUTH
+};
+
+std::map<std::string, Packet> packetCodes;
+std::map<std::string, Stage> stageCodes;
+
+class PacketParser : public EnumParser<Packet>
+{
+ public:
+ PacketParser(NodeParser* next, Packet& packet, std::string& packetStr)
+ : EnumParser(next, packet, packetStr, packetCodes)
+ {
+ if (!packetCodes.empty())
+ return;
+ packetCodes["ping"] = PING;
+ packetCodes["pong"] = PONG;
+ packetCodes["data"] = DATA;
+ }
+};
+
+class StageParser : public EnumParser<Stage>
+{
+ public:
+ StageParser(NodeParser* next, Stage& stage, std::string& stageStr)
+ : EnumParser(next, stage, stageStr, stageCodes)
+ {
+ if (!stageCodes.empty())
+ return;
+ stageCodes["authorize"] = AUTHORIZE;
+ stageCodes["authenticate"] = AUTHENTICATE;
+ stageCodes["preacct"] = PREACCT;
+ stageCodes["accounting"] = ACCOUNTING;
+ stageCodes["postauth"] = POSTAUTH;
+ }
+};
+
+class TopParser : public NodeParser
+{
+ public:
+ typedef void (*Callback) (void* /*data*/);
+ TopParser(Callback callback, void* data)
+ : m_packetParser(this, m_packet, m_packetStr),
+ m_stageParser(this, m_stage, m_stageStr),
+ m_pairsParser(this, m_data),
+ m_callback(callback), m_callbackData(data)
+ {}
+
+ virtual NodeParser* parseStartMap() { return this; }
+ virtual NodeParser* parseMapKey(const std::string& value)
+ {
+ std::string key = ToLower(value);
+
+ if (key == "packet")
+ return &m_packetParser;
+ else if (key == "stage")
+ return &m_stageParser;
+ else if (key == "pairs")
+ return &m_pairsParser;
+
+ return this;
+ }
+ virtual NodeParser* parseEndMap() { m_callback(m_callbackData); return this; }
+
+ const std::string& packetStr() const { return m_packetStr; }
+ Packet packet() const { return m_packet; }
+ const std::string& stageStr() const { return m_stageStr; }
+ Stage stage() const { return m_stage; }
+ const Config::Pairs& data() const { return m_data; }
+
+ private:
+ std::string m_packetStr;
+ Packet m_packet;
+ std::string m_stageStr;
+ Stage m_stage;
+ Config::Pairs m_data;
+
+ PacketParser m_packetParser;
+ StageParser m_stageParser;
+ PairsParser m_pairsParser;
+
+ Callback m_callback;
+ void* m_callbackData;
+};
+
+class ProtoParser : public Parser
+{
+ public:
+ ProtoParser(TopParser::Callback callback, void* data)
+ : Parser( &m_topParser ),
+ m_topParser(callback, data)
+ {}
+
+ const std::string& packetStr() const { return m_topParser.packetStr(); }
+ Packet packet() const { return m_topParser.packet(); }
+ const std::string& stageStr() const { return m_topParser.stageStr(); }
+ Stage stage() const { return m_topParser.stage(); }
+ const Config::Pairs& data() const { return m_topParser.data(); }
+
+ private:
+ TopParser m_topParser;
+};
+
+class PacketGen : public Gen
+{
+ public:
+ PacketGen(const std::string& type)
+ : m_type(type)
+ {
+ m_gen.add("packet", m_type);
+ }
+ void run(yajl_gen_t* handle) const
+ {
+ m_gen.run(handle);
+ }
+ PacketGen& add(const std::string& key, const std::string& value)
+ {
+ m_gen.add(key, new StringGen(value));
+ return *this;
+ }
+ PacketGen& add(const std::string& key, MapGen* map)
+ {
+ m_gen.add(key, map);
+ return *this;
+ }
+ PacketGen& add(const std::string& key, MapGen& map)
+ {
+ m_gen.add(key, map);
+ return *this;
+ }
+ private:
+ MapGen m_gen;
+ StringGen m_type;
+};
+
+std::string toString(Config::ReturnCode code)
+{
+ switch (code)
+ {
+ case Config::REJECT: return "reject";
+ case Config::FAIL: return "fail";
+ case Config::OK: return "ok";
+ case Config::HANDLED: return "handled";
+ case Config::INVALID: return "invalid";
+ case Config::USERLOCK: return "userlock";
+ case Config::NOTFOUND: return "notfound";
+ case Config::NOOP: return "noop";
+ case Config::UPDATED: return "noop";
+ }
+ return "reject";
+}
+
+}
+
+class Conn::Impl
+{
+ public:
+ Impl(USERS& users, PLUGIN_LOGGER& logger, RADIUS& plugin, const Config& config, int fd, const std::string& remote);
+ ~Impl();
+
+ int sock() const { return m_sock; }
+
+ bool read();
+ bool tick();
+
+ bool isOk() const { return m_ok; }
+
+ private:
+ USERS& m_users;
+ PLUGIN_LOGGER& m_logger;
+ RADIUS& m_plugin;
+ const Config& m_config;
+ int m_sock;
+ std::string m_remote;
+ bool m_ok;
+ time_t m_lastPing;
+ time_t m_lastActivity;
+ ProtoParser m_parser;
+ std::set<std::string> m_authorized;
+
+ template <typename T>
+ const T& stageMember(T Config::Section::* member) const
+ {
+ switch (m_parser.stage())
+ {
+ case AUTHORIZE: return m_config.autz.*member;
+ case AUTHENTICATE: return m_config.auth.*member;
+ case POSTAUTH: return m_config.postauth.*member;
+ case PREACCT: return m_config.preacct.*member;
+ case ACCOUNTING: return m_config.acct.*member;
+ }
+ throw std::runtime_error("Invalid stage: '" + m_parser.stageStr() + "'.");
+ }
+
+ const Config::Pairs& match() const { return stageMember(&Config::Section::match); }
+ const Config::Pairs& modify() const { return stageMember(&Config::Section::modify); }
+ const Config::Pairs& reply() const { return stageMember(&Config::Section::reply); }
+ Config::ReturnCode returnCode() const { return stageMember(&Config::Section::returnCode); }
+ const Config::Authorize& authorize() const { return stageMember(&Config::Section::authorize); }
+
+ static void process(void* data);
+ void processPing();
+ void processPong();
+ void processData();
+ bool answer(const USER& user);
+ bool answerNo();
+ bool sendPing();
+ bool sendPong();
+
+ static bool write(void* data, const char* buf, size_t size);
+};
+
+Conn::Conn(USERS& users, PLUGIN_LOGGER& logger, RADIUS& plugin, const Config& config, int fd, const std::string& remote)
+ : m_impl(new Impl(users, logger, plugin, config, fd, remote))
+{
+}
+
+Conn::~Conn()
+{
+}
+
+int Conn::sock() const
+{
+ return m_impl->sock();
+}
+
+bool Conn::read()
+{
+ return m_impl->read();
+}
+
+bool Conn::tick()
+{
+ return m_impl->tick();
+}
+
+bool Conn::isOk() const
+{
+ return m_impl->isOk();
+}
+
+Conn::Impl::Impl(USERS& users, PLUGIN_LOGGER& logger, RADIUS& plugin, const Config& config, int fd, const std::string& remote)
+ : m_users(users),
+ m_logger(logger),
+ m_plugin(plugin),
+ m_config(config),
+ m_sock(fd),
+ m_remote(remote),
+ m_ok(true),
+ m_lastPing(time(NULL)),
+ m_lastActivity(m_lastPing),
+ m_parser(&Conn::Impl::process, this)
+{
+}
+
+Conn::Impl::~Impl()
+{
+ close(m_sock);
+
+ std::set<std::string>::const_iterator it = m_authorized.begin();
+ for (; it != m_authorized.end(); ++it)
+ m_plugin.unauthorize(*it, "Lost connection to RADIUS server " + m_remote + ".");
+}
+
+bool Conn::Impl::read()
+{
+ static std::vector<char> buffer(1024);
+ ssize_t res = ::read(m_sock, buffer.data(), buffer.size());
+ if (res < 0)
+ {
+ m_logger("Failed to read data from '" + m_remote + "': " + strerror(errno));
+ m_ok = false;
+ return false;
+ }
+ printfd(__FILE__, "Read %d bytes.\n%s\n", res, std::string(buffer.data(), res).c_str());
+ m_lastActivity = time(NULL);
+ if (res == 0)
+ {
+ m_ok = false;
+ return true;
+ }
+ return m_parser.append(buffer.data(), res);
+}
+
+bool Conn::Impl::tick()
+{
+ time_t now = time(NULL);
+ if (difftime(now, m_lastActivity) > CONN_TIMEOUT)
+ {
+ int delta = difftime(now, m_lastActivity);
+ printfd(__FILE__, "Connection to '%s' timed out: %d sec.\n", m_remote.c_str(), delta);
+ m_logger("Connection to " + m_remote + " timed out.");
+ m_ok = false;
+ return false;
+ }
+ if (difftime(now, m_lastPing) > PING_TIMEOUT)
+ {
+ int delta = difftime(now, m_lastPing);
+ printfd(__FILE__, "Ping timeout: %d sec. Sending ping...\n", delta);
+ sendPing();
+ }
+ return true;
+}
+
+void Conn::Impl::process(void* data)
+{
+ Impl& impl = *static_cast<Impl*>(data);
+ try
+ {
+ switch (impl.m_parser.packet())
+ {
+ case PING:
+ impl.processPing();
+ return;
+ case PONG:
+ impl.processPong();
+ return;
+ case DATA:
+ impl.processData();
+ return;
+ }
+ }
+ catch (const std::exception& ex)
+ {
+ printfd(__FILE__, "Processing error. %s", ex.what());
+ impl.m_logger("Processing error. %s", ex.what());
+ }
+ printfd(__FILE__, "Received invalid packet type: '%s'.\n", impl.m_parser.packetStr().c_str());
+ impl.m_logger("Received invalid packet type: " + impl.m_parser.packetStr());
+}
+
+void Conn::Impl::processPing()
+{
+ printfd(__FILE__, "Got ping. Sending pong...\n");
+ sendPong();
+}
+
+void Conn::Impl::processPong()
+{
+ printfd(__FILE__, "Got pong.\n");
+ m_lastActivity = time(NULL);
+}
+
+void Conn::Impl::processData()
+{
+ printfd(__FILE__, "Got data.\n");
+ int handle = m_users.OpenSearch();
+
+ USER_PTR user = NULL;
+ bool matched = false;
+ while (m_users.SearchNext(handle, &user) == 0)
+ {
+ if (user == NULL)
+ continue;
+
+ matched = true;
+ for (Config::Pairs::const_iterator it = match().begin(); it != match().end(); ++it)
+ {
+ Config::Pairs::const_iterator pos = m_parser.data().find(it->first);
+ if (pos == m_parser.data().end())
+ {
+ matched = false;
+ break;
+ }
+ if (user->GetParamValue(it->second) != pos->second)
+ {
+ matched = false;
+ break;
+ }
+ }
+ if (!matched)
+ continue;
+ answer(*user);
+ if (authorize().check(*user, m_parser.data()))
+ {
+ m_plugin.authorize(*user);
+ m_authorized.insert(user->GetLogin());
+ }
+ break;
+ }
+
+ if (!matched)
+ answerNo();
+
+ m_users.CloseSearch(handle);
+}
+
+bool Conn::Impl::answer(const USER& user)
+{
+ printfd(__FILE__, "Got match. Sending answer...\n");
+ MapGen replyData;
+ for (Config::Pairs::const_iterator it = reply().begin(); it != reply().end(); ++it)
+ replyData.add(it->first, new StringGen(user.GetParamValue(it->second)));
+
+ MapGen modifyData;
+ for (Config::Pairs::const_iterator it = modify().begin(); it != modify().end(); ++it)
+ modifyData.add(it->first, new StringGen(user.GetParamValue(it->second)));
+
+ PacketGen gen("data");
+ gen.add("result", "ok")
+ .add("reply", replyData)
+ .add("modify", modifyData);
+
+ m_lastPing = time(NULL);
+
+ return generate(gen, &Conn::Impl::write, this);
+}
+
+bool Conn::Impl::answerNo()
+{
+ printfd(__FILE__, "No match. Sending answer...\n");
+ PacketGen gen("data");
+ gen.add("result", "no");
+ gen.add("return_code", toString(returnCode()));
+
+ m_lastPing = time(NULL);
+
+ return generate(gen, &Conn::Impl::write, this);
+}
+
+bool Conn::Impl::sendPing()
+{
+ PacketGen gen("ping");
+
+ m_lastPing = time(NULL);
+
+ return generate(gen, &Conn::Impl::write, this);
+}
+
+bool Conn::Impl::sendPong()
+{
+ PacketGen gen("pong");
+
+ m_lastPing = time(NULL);
+
+ return generate(gen, &Conn::Impl::write, this);
+}
+
+bool Conn::Impl::write(void* data, const char* buf, size_t size)
+{
+ std::string json(buf, size);
+ printfd(__FILE__, "Writing JSON:\n%s\n", json.c_str());
+ Conn::Impl& conn = *static_cast<Conn::Impl*>(data);
+ while (size > 0)
+ {
+ ssize_t res = ::send(conn.m_sock, buf, size, MSG_NOSIGNAL);
+ if (res < 0)
+ {
+ conn.m_logger("Failed to write pong to '" + conn.m_remote + "': " + strerror(errno));
+ conn.m_ok = false;
+ return false;
+ }
+ size -= res;
+ }
+ return true;
+}
git.stg.codes / stg.git / blobdiff