+/*
+ * 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 "radius.h"
+
+#include "stg/store.h"
+#include "stg/users.h"
+#include "stg/plugin_creator.h"
+#include "stg/common.h"
+
+#include <algorithm>
+#include <stdexcept>
+#include <csignal>
+#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>
+
+using STG::Config;
+using STG::Conn;
+
+namespace
+{
+
+PLUGIN_CREATOR<RADIUS> creator;
+
+}
+
+extern "C" PLUGIN * GetPlugin()
+{
+ return creator.GetPlugin();
+}
+
+RADIUS::RADIUS()
+ : m_config(),
+ m_running(false),
+ m_stopped(true),
+ m_users(NULL),
+ m_store(NULL),
+ m_listenSocket(0),
+ m_logger(GetPluginLogger(GetStgLogger(), "radius"))
+{
+}
+
+int RADIUS::ParseSettings()
+{
+ try {
+ m_config = STG::Config(m_settings);
+ return reconnect() ? 0 : -1;
+ } catch (const std::runtime_error& ex) {
+ m_logger("Failed to parse settings. %s", ex.what());
+ return -1;
+ }
+}
+
+int RADIUS::Start()
+{
+ if (m_running)
+ return 0;
+
+ int res = pthread_create(&m_thread, NULL, run, this);
+ if (res == 0)
+ return 0;
+
+ m_error = strerror(res);
+ m_logger("Failed to create thread: '" + m_error + "'.");
+ return -1;
+}
+
+int RADIUS::Stop()
+{
+ std::set<std::string>::const_iterator it = m_logins.begin();
+ for (; it != m_logins.end(); ++it)
+ m_users->Unauthorize(*it, this, "Stopping RADIUS plugin.");
+ m_logins.clear();
+
+ if (m_stopped)
+ return 0;
+
+ 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 0;
+ }
+
+ if (m_config.connectionType == Config::UNIX)
+ unlink(m_config.bindAddress.c_str());
+
+ m_error = "Failed to stop thread.";
+ m_logger(m_error);
+ return -1;
+}
+//-----------------------------------------------------------------------------
+void* RADIUS::run(void* d)
+{
+ sigset_t signalSet;
+ sigfillset(&signalSet);
+ pthread_sigmask(SIG_BLOCK, &signalSet, NULL);
+
+ static_cast<RADIUS *>(d)->runImpl();
+
+ return NULL;
+}
+
+bool RADIUS::reconnect()
+{
+ if (!m_conns.empty())
+ {
+ std::deque<STG::Conn *>::const_iterator it;
+ for (it = m_conns.begin(); it != m_conns.end(); ++it)
+ delete(*it);
+ m_conns.clear();
+ }
+ if (m_listenSocket != 0)
+ {
+ shutdown(m_listenSocket, SHUT_RDWR);
+ close(m_listenSocket);
+ }
+ if (m_config.connectionType == Config::UNIX)
+ m_listenSocket = createUNIX();
+ else
+ m_listenSocket = createTCP();
+ if (m_listenSocket == 0)
+ return false;
+ if (listen(m_listenSocket, 100) == -1)
+ {
+ m_error = std::string("Error starting to listen socket: ") + strerror(errno);
+ m_logger(m_error);
+ return false;
+ }
+ return true;
+}
+
+int RADIUS::createUNIX() const
+{
+ int fd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (fd == -1)
+ {
+ m_error = std::string("Error creating UNIX socket: ") + strerror(errno);
+ m_logger(m_error);
+ return 0;
+ }
+ struct sockaddr_un addr;
+ memset(&addr, 0, sizeof(addr));
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, m_config.bindAddress.c_str(), m_config.bindAddress.length());
+ unlink(m_config.bindAddress.c_str());
+ if (bind(fd, reinterpret_cast<struct sockaddr*>(&addr), sizeof(addr)) == -1)
+ {
+ shutdown(fd, SHUT_RDWR);
+ close(fd);
+ m_error = std::string("Error binding UNIX socket: ") + strerror(errno);
+ m_logger(m_error);
+ return 0;
+ }
+ chown(m_config.bindAddress.c_str(), m_config.sockUID, m_config.sockGID);
+ if (m_config.sockMode != static_cast<mode_t>(-1))
+ chmod(m_config.bindAddress.c_str(), m_config.sockMode);
+ return fd;
+}
+
+int RADIUS::createTCP() const
+{
+ addrinfo hints;
+ memset(&hints, 0, sizeof(addrinfo));
+
+ hints.ai_family = AF_INET; /* Allow IPv4 */
+ hints.ai_socktype = SOCK_STREAM; /* Stream socket */
+ hints.ai_flags = AI_PASSIVE; /* 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.bindAddress.c_str(), m_config.portStr.c_str(), &hints, &ais);
+ if (res != 0)
+ {
+ m_error = "Error resolving address '" + m_config.bindAddress + "': " + gai_strerror(res);
+ m_logger(m_error);
+ return 0;
+ }
+
+ for (addrinfo* ai = ais; ai != NULL; ai = ai->ai_next)
+ {
+ int fd = socket(AF_INET, SOCK_STREAM, 0);
+ if (fd == -1)
+ {
+ m_error = std::string("Error creating TCP socket: ") + strerror(errno);
+ m_logger(m_error);
+ freeaddrinfo(ais);
+ return 0;
+ }
+ if (bind(fd, ai->ai_addr, ai->ai_addrlen) == -1)
+ {
+ shutdown(fd, SHUT_RDWR);
+ close(fd);
+ m_error = std::string("Error binding TCP socket: ") + strerror(errno);
+ m_logger(m_error);
+ continue;
+ }
+ freeaddrinfo(ais);
+ return fd;
+ }
+
+ m_error = "Failed to resolve '" + m_config.bindAddress;
+ m_logger(m_error);
+
+ freeaddrinfo(ais);
+ return 0;
+}
+
+void RADIUS::runImpl()
+{
+ m_running = true;
+ m_stopped = false;
+
+ while (m_running) {
+ fd_set fds;
+
+ buildFDSet(fds);
+
+ struct timeval tv;
+ tv.tv_sec = 0;
+ tv.tv_usec = 500000;
+
+ int res = select(maxFD() + 1, &fds, NULL, NULL, &tv);
+ if (res < 0)
+ {
+ if (errno == EINTR)
+ continue;
+ m_error = std::string("'select' is failed: '") + strerror(errno) + "'.";
+ m_logger(m_error);
+ break;
+ }
+
+ if (!m_running)
+ break;
+
+ if (res > 0)
+ handleEvents(fds);
+ else
+ {
+ for (std::deque<Conn*>::iterator it = m_conns.begin(); it != m_conns.end(); ++it)
+ (*it)->tick();
+ }
+
+ cleanupConns();
+ }
+
+ m_stopped = true;
+}
+
+int RADIUS::maxFD() const
+{
+ int maxFD = m_listenSocket;
+ std::deque<STG::Conn *>::const_iterator it;
+ for (it = m_conns.begin(); it != m_conns.end(); ++it)
+ if (maxFD < (*it)->sock())
+ maxFD = (*it)->sock();
+ return maxFD;
+}
+
+void RADIUS::buildFDSet(fd_set & fds) const
+{
+ FD_ZERO(&fds);
+ FD_SET(m_listenSocket, &fds);
+ std::deque<STG::Conn *>::const_iterator it;
+ for (it = m_conns.begin(); it != m_conns.end(); ++it)
+ FD_SET((*it)->sock(), &fds);
+}
+
+void RADIUS::cleanupConns()
+{
+ std::deque<STG::Conn *>::iterator pos;
+ for (pos = m_conns.begin(); pos != m_conns.end(); ++pos)
+ if (!(*pos)->isOk()) {
+ delete *pos;
+ *pos = NULL;
+ }
+
+ pos = std::remove(m_conns.begin(), m_conns.end(), static_cast<STG::Conn *>(NULL));
+ m_conns.erase(pos, m_conns.end());
+}
+
+void RADIUS::handleEvents(const fd_set & fds)
+{
+ if (FD_ISSET(m_listenSocket, &fds))
+ acceptConnection();
+ else
+ {
+ std::deque<STG::Conn *>::iterator it;
+ for (it = m_conns.begin(); it != m_conns.end(); ++it)
+ if (FD_ISSET((*it)->sock(), &fds))
+ (*it)->read();
+ else
+ (*it)->tick();
+ }
+}
+
+void RADIUS::acceptConnection()
+{
+ if (m_config.connectionType == Config::UNIX)
+ acceptUNIX();
+ else
+ acceptTCP();
+}
+
+void RADIUS::acceptUNIX()
+{
+ struct sockaddr_un addr;
+ memset(&addr, 0, sizeof(addr));
+ socklen_t size = sizeof(addr);
+ int res = accept(m_listenSocket, reinterpret_cast<sockaddr*>(&addr), &size);
+ if (res == -1)
+ {
+ m_error = std::string("Failed to accept UNIX connection: ") + strerror(errno);
+ m_logger(m_error);
+ return;
+ }
+ printfd(__FILE__, "New UNIX connection: '%s'\n", addr.sun_path);
+ m_conns.push_back(new Conn(*m_users, m_logger, *this, m_config, res, addr.sun_path));
+}
+
+void RADIUS::acceptTCP()
+{
+ struct sockaddr_in addr;
+ memset(&addr, 0, sizeof(addr));
+ socklen_t size = sizeof(addr);
+ int res = accept(m_listenSocket, reinterpret_cast<sockaddr*>(&addr), &size);
+ if (res == -1)
+ {
+ m_error = std::string("Failed to accept TCP connection: ") + strerror(errno);
+ m_logger(m_error);
+ return;
+ }
+ std::string remote = inet_ntostring(addr.sin_addr.s_addr) + ":" + x2str(ntohs(addr.sin_port));
+ printfd(__FILE__, "New TCP connection: '%s'\n", remote.c_str());
+ m_conns.push_back(new Conn(*m_users, m_logger, *this, m_config, res, remote));
+}
+
+void RADIUS::authorize(const USER& user)
+{
+ uint32_t ip = 0;
+ const std::string& login(user.GetLogin());
+ if (!m_users->Authorize(login, ip, 0xffFFffFF, this))
+ {
+ m_error = "Unable to authorize user '" + login + "' with ip " + inet_ntostring(ip) + ".";
+ m_logger(m_error);
+ }
+ else
+ m_logins.insert(login);
+}
+
+void RADIUS::unauthorize(const std::string& login, const std::string& reason)
+{
+ const std::set<std::string>::const_iterator it = m_logins.find(login);
+ if (it == m_logins.end())
+ return;
+ m_logins.erase(it);
+ m_users->Unauthorize(login, this, reason);
+}
git.stg.codes / stg.git / blobdiff