--- /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 "radlog.h"
+
+#include "stg/json_parser.h"
+#include "stg/json_generator.h"
+#include "stg/locker.h"
+
+#include <cerrno>
+#include <cstring>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h> // UNIX
+#include <netinet/in.h> // IP
+#include <netinet/tcp.h> // TCP
+#include <netdb.h>
+
+namespace RLM = STG::RLM;
+
+using RLM::Conn;
+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;
+
+struct ChannelConfig {
+ struct Error : std::runtime_error {
+ Error(const std::string& message) : runtime_error(message) {}
+ };
+
+ ChannelConfig(std::string address);
+
+ std::string transport;
+ std::string key;
+ std::string address;
+ std::string portStr;
+ uint16_t port;
+};
+
+std::string toStage(RLM::REQUEST_TYPE type)
+{
+ switch (type)
+ {
+ case RLM::AUTHORIZE: return "authorize";
+ case RLM::AUTHENTICATE: return "authenticate";
+ case RLM::POST_AUTH: return "postauth";
+ case RLM::PRE_ACCT: return "preacct";
+ case RLM::ACCOUNT: return "accounting";
+ }
+ return "";
+}
+
+enum Packet
+{
+ PING,
+ PONG,
+ DATA
+};
+
+std::map<std::string, Packet> packetCodes;
+std::map<std::string, bool> resultCodes;
+
+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 ResultParser : public EnumParser<bool>
+{
+ public:
+ ResultParser(NodeParser* next, bool& result, std::string& resultStr)
+ : EnumParser(next, result, resultStr, resultCodes)
+ {
+ if (!resultCodes.empty())
+ return;
+ resultCodes["no"] = false;
+ resultCodes["ok"] = true;
+ }
+};
+
+class TopParser : public NodeParser
+{
+ public:
+ typedef void (*Callback) (void* /*data*/);
+ TopParser(Callback callback, void* data)
+ : m_packet(PING),
+ m_result(false),
+ m_packetParser(this, m_packet, m_packetStr),
+ m_resultParser(this, m_result, m_resultStr),
+ m_replyParser(this, m_reply),
+ m_modifyParser(this, m_modify),
+ m_callback(callback), m_data(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 == "result")
+ return &m_resultParser;
+ else if (key == "reply")
+ return &m_replyParser;
+ else if (key == "modify")
+ return &m_modifyParser;
+
+ return this;
+ }
+ virtual NodeParser* parseEndMap() { m_callback(m_data); return this; }
+
+ const std::string& packetStr() const { return m_packetStr; }
+ Packet packet() const { return m_packet; }
+ const std::string& resultStr() const { return m_resultStr; }
+ bool result() const { return m_result; }
+ const PairsParser::Pairs& reply() const { return m_reply; }
+ const PairsParser::Pairs& modify() const { return m_modify; }
+
+ private:
+ std::string m_packetStr;
+ Packet m_packet;
+ std::string m_resultStr;
+ bool m_result;
+ PairsParser::Pairs m_reply;
+ PairsParser::Pairs m_modify;
+
+ PacketParser m_packetParser;
+ ResultParser m_resultParser;
+ PairsParser m_replyParser;
+ PairsParser m_modifyParser;
+
+ Callback m_callback;
+ void* m_data;
+};
+
+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& resultStr() const { return m_topParser.resultStr(); }
+ bool result() const { return m_topParser.result(); }
+ const PairsParser::Pairs& reply() const { return m_topParser.reply(); }
+ const PairsParser::Pairs& modify() const { return m_topParser.modify(); }
+
+ 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;
+ }
+ private:
+ MapGen m_gen;
+ StringGen m_type;
+};
+
+}
+
+class Conn::Impl
+{
+public:
+ Impl(const std::string& address, Callback callback, void* data);
+ ~Impl();
+
+ bool stop();
+ bool connected() const { return m_connected; }
+
+ bool request(REQUEST_TYPE type, const std::string& userName, const std::string& password, const PAIRS& pairs);
+
+private:
+ ChannelConfig m_config;
+
+ int m_sock;
+
+ bool m_running;
+ bool m_stopped;
+
+ time_t m_lastPing;
+ time_t m_lastActivity;
+
+ pthread_t m_thread;
+ pthread_mutex_t m_mutex;
+
+ Callback m_callback;
+ void* m_data;
+
+ ProtoParser m_parser;
+
+ bool m_connected;
+
+ void m_writeHeader(REQUEST_TYPE type, const std::string& userName, const std::string& password);
+ void m_writePairBlock(const PAIRS& source);
+ PAIRS m_readPairBlock();
+
+ static void* run(void* );
+
+ void runImpl();
+
+ int connect();
+ int connectTCP();
+ int connectUNIX();
+
+ bool read();
+ bool tick();
+
+ static void process(void* data);
+ void processPing();
+ void processPong();
+ void processData();
+ bool sendPing();
+ bool sendPong();
+
+ static bool write(void* data, const char* buf, size_t size);
+};
+
+ChannelConfig::ChannelConfig(std::string addr)
+{
+ // unix:pass@/var/run/stg.sock
+ // tcp:secret@192.168.0.1:12345
+ // udp:key@isp.com.ua:54321
+
+ size_t pos = addr.find_first_of(':');
+ if (pos == std::string::npos)
+ throw Error("Missing transport name.");
+ transport = ToLower(addr.substr(0, pos));
+ addr = addr.substr(pos + 1);
+ if (addr.empty())
+ throw Error("Missing address to connect to.");
+ pos = addr.find_first_of('@');
+ if (pos != std::string::npos) {
+ key = addr.substr(0, pos);
+ addr = addr.substr(pos + 1);
+ if (addr.empty())
+ throw Error("Missing address to connect to.");
+ }
+ if (transport == "unix")
+ {
+ address = addr;
+ return;
+ }
+ pos = addr.find_first_of(':');
+ if (pos == std::string::npos)
+ throw Error("Missing port.");
+ address = addr.substr(0, pos);
+ portStr = addr.substr(pos + 1);
+ if (str2x(portStr, port))
+ throw Error("Invalid port value.");
+}
+
+Conn::Impl::Impl(const std::string& address, Callback callback, void* data)
+ : m_config(address),
+ m_sock(connect()),
+ m_running(false),
+ m_stopped(true),
+ m_lastPing(time(NULL)),
+ m_lastActivity(m_lastPing),
+ m_callback(callback),
+ m_data(data),
+ m_parser(&Conn::Impl::process, this),
+ m_connected(true)
+{
+ pthread_mutex_init(&m_mutex, NULL);
+ int res = pthread_create(&m_thread, NULL, &Conn::Impl::run, this);
+ if (res != 0)
+ throw Error("Failed to create thread: " + std::string(strerror(errno)));
+}
+
+Conn::Impl::~Impl()
+{
+ stop();
+ shutdown(m_sock, SHUT_RDWR);
+ close(m_sock);
+ pthread_mutex_destroy(&m_mutex);
+}
+
+bool Conn::Impl::stop()
+{
+ m_connected = false;
+
+ if (m_stopped)
+ return true;
+
+ m_running = false;
+
+ for (size_t i = 0; i < 25 && !m_stopped; i++) {
+ struct timespec ts = {0, 200000000};
+ nanosleep(&ts, NULL);
+ }
+
+ if (m_stopped) {
+ pthread_join(m_thread, NULL);
+ return true;
+ }
+
+ return false;
+}
+
+bool Conn::Impl::request(REQUEST_TYPE type, const std::string& userName, const std::string& password, const PAIRS& pairs)
+{
+ MapGen map;
+ for (PAIRS::const_iterator it = pairs.begin(); it != pairs.end(); ++it)
+ map.add(it->first, new StringGen(it->second));
+ map.add("Radius-Username", new StringGen(userName));
+ map.add("Radius-Userpass", new StringGen(password));
+
+ PacketGen gen("data");
+ gen.add("stage", toStage(type))
+ .add("pairs", map);
+
+ STG_LOCKER lock(m_mutex);
+
+ m_lastPing = time(NULL);
+
+ return generate(gen, &Conn::Impl::write, this);
+}
+
+void Conn::Impl::runImpl()
+{
+ m_running = true;
+
+ while (m_running) {
+ fd_set fds;
+
+ FD_ZERO(&fds);
+ FD_SET(m_sock, &fds);
+
+ struct timeval tv;
+ tv.tv_sec = 0;
+ tv.tv_usec = 500000;
+
+ int res = select(m_sock + 1, &fds, NULL, NULL, &tv);
+ if (res < 0)
+ {
+ if (errno == EINTR)
+ continue;
+ RadLog("'select' is failed: %s", strerror(errno));
+ break;
+ }
+
+ if (!m_running)
+ break;
+
+ STG_LOCKER lock(m_mutex);
+
+ if (res > 0)
+ {
+ if (FD_ISSET(m_sock, &fds))
+ m_running = read();
+ }
+ else
+ m_running = tick();
+ }
+
+ m_connected = false;
+ m_stopped = true;
+}
+
+int Conn::Impl::connect()
+{
+ if (m_config.transport == "tcp")
+ return connectTCP();
+ else if (m_config.transport == "unix")
+ return connectUNIX();
+ throw Error("Invalid transport type: '" + m_config.transport + "'. Should be 'tcp' or 'unix'.");
+}
+
+int Conn::Impl::connectTCP()
+{
+ addrinfo hints;
+ memset(&hints, 0, sizeof(addrinfo));
+
+ hints.ai_family = AF_INET; /* Allow IPv4 */
+ hints.ai_socktype = SOCK_STREAM; /* Stream socket */
+ hints.ai_flags = 0; /* For wildcard IP address */
+ hints.ai_protocol = 0; /* Any protocol */
+ hints.ai_canonname = NULL;
+ hints.ai_addr = NULL;
+ hints.ai_next = NULL;
+
+ addrinfo* ais = NULL;
+ int res = getaddrinfo(m_config.address.c_str(), m_config.portStr.c_str(), &hints, &ais);
+ if (res != 0)
+ throw Error("Error resolvin address '" + m_config.address + "': " + gai_strerror(res));
+
+ for (addrinfo* ai = ais; ai != NULL; ai = ai->ai_next)
+ {
+ int fd = socket(AF_INET, SOCK_STREAM, 0);
+ if (fd == -1)
+ {
+ Error error(std::string("Error creating TCP socket: ") + strerror(errno));
+ freeaddrinfo(ais);
+ throw error;
+ }
+ if (::connect(fd, ai->ai_addr, ai->ai_addrlen) == -1)
+ {
+ shutdown(fd, SHUT_RDWR);
+ close(fd);
+ RadLog("'connect' is failed: %s", strerror(errno));
+ continue;
+ }
+ freeaddrinfo(ais);
+ return fd;
+ }
+
+ freeaddrinfo(ais);
+
+ throw Error("Failed to resolve '" + m_config.address);
+};
+
+int Conn::Impl::connectUNIX()
+{
+ int fd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (fd == -1)
+ throw Error(std::string("Error creating UNIX socket: ") + strerror(errno));
+ struct sockaddr_un addr;
+ memset(&addr, 0, sizeof(addr));
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, m_config.address.c_str(), m_config.address.length());
+ if (::connect(fd, reinterpret_cast<struct sockaddr*>(&addr), sizeof(addr)) == -1)
+ {
+ Error error(std::string("Error connecting UNIX socket: ") + strerror(errno));
+ shutdown(fd, SHUT_RDWR);
+ close(fd);
+ throw error;
+ }
+ return fd;
+}
+
+bool Conn::Impl::read()
+{
+ static std::vector<char> buffer(1024);
+ ssize_t res = ::read(m_sock, buffer.data(), buffer.size());
+ if (res < 0)
+ {
+ RadLog("Failed to read data: %s", strerror(errno));
+ return false;
+ }
+ m_lastActivity = time(NULL);
+ RadLog("Read %d bytes.\n%s\n", res, std::string(buffer.data(), res).c_str());
+ if (res == 0)
+ {
+ m_parser.last();
+ return false;
+ }
+ 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);
+ RadLog("Connection timeout: %d sec.", delta);
+ //m_logger("Connection to " + m_remote + " timed out.");
+ return false;
+ }
+ if (difftime(now, m_lastPing) > PING_TIMEOUT)
+ {
+ int delta = difftime(now, m_lastPing);
+ RadLog("Ping timeout: %d sec. Sending ping...", delta);
+ sendPing();
+ }
+ return true;
+}
+
+void Conn::Impl::process(void* data)
+{
+ Impl& impl = *static_cast<Impl*>(data);
+ switch (impl.m_parser.packet())
+ {
+ case PING:
+ impl.processPing();
+ return;
+ case PONG:
+ impl.processPong();
+ return;
+ case DATA:
+ impl.processData();
+ return;
+ }
+ RadLog("Received invalid packet type: '%s'.", impl.m_parser.packetStr().c_str());
+}
+
+void Conn::Impl::processPing()
+{
+ RadLog("Got ping, sending pong.");
+ sendPong();
+}
+
+void Conn::Impl::processPong()
+{
+ RadLog("Got pong.");
+ m_lastActivity = time(NULL);
+}
+
+void Conn::Impl::processData()
+{
+ RESULT data;
+ RadLog("Got data.");
+ for (PairsParser::Pairs::const_iterator it = m_parser.reply().begin(); it != m_parser.reply().end(); ++it)
+ data.reply.push_back(std::make_pair(it->first, it->second));
+ for (PairsParser::Pairs::const_iterator it = m_parser.modify().begin(); it != m_parser.modify().end(); ++it)
+ data.modify.push_back(std::make_pair(it->first, it->second));
+ m_callback(m_data, data, m_parser.result());
+}
+
+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)
+{
+ RadLog("Sending JSON:");
+ std::string json(buf, size);
+ RadLog("%s", json.c_str());
+ Conn::Impl& impl = *static_cast<Conn::Impl*>(data);
+ while (size > 0)
+ {
+ ssize_t res = ::send(impl.m_sock, buf, size, MSG_NOSIGNAL);
+ if (res < 0)
+ {
+ impl.m_connected = false;
+ RadLog("Failed to write data: %s.", strerror(errno));
+ return false;
+ }
+ size -= res;
+ }
+ return true;
+}
+
+void* Conn::Impl::run(void* data)
+{
+ Impl& impl = *static_cast<Impl*>(data);
+ impl.runImpl();
+ return NULL;
+}
git.stg.codes / stg.git / commitdiff