Handle failures in Conn ctor.

[stg.git] / projects / stargazer / plugins / configuration / sgconfig / configproto.cpp

diff --git a/projects/stargazer/plugins/configuration/sgconfig/configproto.cpp b/projects/stargazer/plugins/configuration/sgconfig/configproto.cpp
index dee6dbb914db53a44a492846dda03d36289e25fd..847e1ebc7e2feeac81c22ef2b6332f783cba09f9 100644 (file)
--- a/projects/stargazer/plugins/configuration/sgconfig/configproto.cpp
+++ b/projects/stargazer/plugins/configuration/sgconfig/configproto.cpp
@@ -14,234 +14,236 @@
  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 

-/*
- *    Date: 27.10.2002
- */
-

 /*
  *    Author : Boris Mikhailenko <stg34@stargazer.dp.ua>
 /*
  *    Author : Boris Mikhailenko <stg34@stargazer.dp.ua>

+ *    Author : Maxim Mamontov <faust@stargazer.dp.ua>

  */
 
  */
 

- /*
- $Revision: 1.22 $
- $Date: 2010/10/04 20:24:14 $
- $Author: faust $
- */

 
 

+#include "conn.h"
+
+#include "stg/common.h"
+#include "stg/logger.h"

 
 

-#include <unistd.h>
+#include <algorithm>
+#include <functional>
+#include <csignal>
+#include <cstring>
+#include <cerrno>
+#include <cassert>

 
 

-#include "configproto.h"
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>

 
 

-//-----------------------------------------------------------------------------
-void ParseXMLStart(void *data, const char *el, const char **attr)
+namespace

 {
 {

-CONFIGPROTO * cp = static_cast<CONFIGPROTO *>(data);

 
 

-if (cp->currParser)
+struct IsFinished : public std::unary_function<STG::Conn *, bool>
+{
+    result_type operator()(const argument_type & arg)

     {
     {

-    cp->currParser->SetAnswerList(&cp->answerList);
-    cp->currParser->SetCurrAdmin(*cp->currAdmin);
-    cp->currParser->ParseStart(data, el, attr);
+        return (arg->IsDone() && !arg->IsKeepAlive()) || !arg->IsOk();

     }
     }

-else
+};
+
+struct RemoveConn : public std::unary_function<STG::Conn *, void>
+{
+    result_type operator()(const argument_type & arg)

     {
     {

-    for (unsigned int i = 0; i < cp->dataParser.size(); i++)
-        {
-        cp->dataParser[i]->SetAnswerList(&cp->answerList);
-        cp->dataParser[i]->SetCurrAdmin(*cp->currAdmin);
-        cp->dataParser[i]->Reset();
-        if (cp->dataParser[i]->ParseStart(data, el, attr) == 0)
-            {
-            cp->currParser = cp->dataParser[i];
-            break;
-            }
-        else
-            {
-            cp->dataParser[i]->Reset();
-            }
-        }
+        delete arg;

     }
     }

+};
+

 }
 }

-//-----------------------------------------------------------------------------
-void ParseXMLEnd(void *data, const char *el)
+
+CONFIGPROTO::CONFIGPROTO(PLUGIN_LOGGER & l)
+    : m_settings(NULL),
+      m_admins(NULL),
+      m_tariffs(NULL),
+      m_users(NULL),
+      m_port(0),
+      m_running(false),
+      m_stopped(true),
+      m_logger(l),
+      m_listenSocket(-1)

 {
 {

-CONFIGPROTO * cp = static_cast<CONFIGPROTO *>(data);
-if (cp->currParser)
-    {
-    if (cp->currParser->ParseEnd(data, el) == 0)
-        {
-        cp->currParser = NULL;
-        }
-    }
-else
-    {
-    for (unsigned int i = 0; i < cp->dataParser.size(); i++)
-        {
-        if (cp->dataParser[i]->ParseEnd(data, el) == 0)
-            {
-            break;
-            }
-        }
-    }
+    std::for_each(m_conns.begin(), m_conns.end(), RemoveConn());

 }
 }

-//-----------------------------------------------------------------------------
-CONFIGPROTO::CONFIGPROTO()
-    : adminIP(0),
-      port(0),
-      nonstop(1),
-      state(0),
-      currAdmin(),
-      WriteServLog(GetStgLogger()),
-      listenSocket(0),
-      admins(NULL),
-      currParser(NULL)
+
+int CONFIGPROTO::Prepare()

 {
 {

-dataParser.push_back(&parserGetServInfo);
+    sigset_t sigmask, oldmask;
+    sigemptyset(&sigmask);
+    sigaddset(&sigmask, SIGINT);
+    sigaddset(&sigmask, SIGTERM);
+    sigaddset(&sigmask, SIGUSR1);
+    sigaddset(&sigmask, SIGHUP);
+    pthread_sigmask(SIG_BLOCK, &sigmask, &oldmask);

 
 

-dataParser.push_back(&parserGetUsers);
-dataParser.push_back(&parserGetUser);
-dataParser.push_back(&parserChgUser);
-dataParser.push_back(&parserAddUser);
-dataParser.push_back(&parserDelUser);
-dataParser.push_back(&parserCheckUser);
-dataParser.push_back(&parserSendMessage);
+    m_listenSocket = socket(PF_INET, SOCK_STREAM, 0);

 
 

-dataParser.push_back(&parserGetTariffs);
-dataParser.push_back(&parserAddTariff);
-dataParser.push_back(&parserDelTariff);
-dataParser.push_back(&parserChgTariff);
+    if (m_listenSocket < 0)
+    {
+        m_errorStr = std::string("Cannot create listen socket: '") + strerror(errno) + "'.";
+        m_logger(m_errorStr);
+        return -1;
+    }

 
 

-dataParser.push_back(&parserGetAdmins);
-dataParser.push_back(&parserChgAdmin);
-dataParser.push_back(&parserDelAdmin);
-dataParser.push_back(&parserAddAdmin);
+    struct sockaddr_in listenAddr;
+    listenAddr.sin_family = PF_INET;
+    listenAddr.sin_port = htons(m_port);
+    listenAddr.sin_addr.s_addr = inet_addr("0.0.0.0"); // TODO: arbitrary address

 
 

-xmlParser = XML_ParserCreate(NULL);
+    int dummy = 1;

 
 

-if (!xmlParser)
+    if (setsockopt(m_listenSocket, SOL_SOCKET, SO_REUSEADDR, &dummy, 4) != 0)

     {
     {

-    WriteServLog("Couldn't allocate memory for parser.");
-    exit(1);
+        m_errorStr = std::string("Failed to set SO_REUSEADDR to the listen socket: '") + strerror(errno) + "'.";
+        m_logger(m_errorStr);
+        return -1;

     }
 
     }
 

-}
-//-----------------------------------------------------------------------------
-CONFIGPROTO::~CONFIGPROTO()
-{
-XML_ParserFree(xmlParser);
-}
-//-----------------------------------------------------------------------------
-int CONFIGPROTO::ParseCommand()
-{
-list<string>::iterator n;
-int done = 0;
-char str[9];
-int len;
+    if (bind(m_listenSocket, reinterpret_cast<sockaddr *>(&listenAddr), sizeof(listenAddr)) == -1)
+    {
+        m_errorStr = std::string("Cannot bind listen socket: '") + strerror(errno) + "'.";
+        m_logger(m_errorStr);
+        return -1;
+    }
+
+    if (listen(m_listenSocket, 64) == -1) // TODO: backlog length
+    {
+        m_errorStr = std::string("Failed to start listening for connections: '") + strerror(errno) + "'.";
+        m_logger(m_errorStr);
+        return -1;
+    }

 
 

-if (requestList.empty())
+    m_running = true;
+    m_stopped = false;

     return 0;
     return 0;

+}

 
 

-n = requestList.begin();
+int CONFIGPROTO::Stop()
+{
+    m_running = false;
+    for (int i = 0; i < 5 && !m_stopped; ++i)
+    {
+        struct timespec ts = {0, 200000000};
+        nanosleep(&ts, NULL);
+    }

 
 

-strncpy(str, (*n).c_str(), 8);
-str[8] = 0;
+    if (!m_stopped)
+    {
+        m_errorStr = "Cannot stop listenign thread.";
+        m_logger(m_errorStr);
+        return -1;
+    }

 
 

-XML_ParserReset(xmlParser, NULL);
-XML_SetElementHandler(xmlParser, ParseXMLStart, ParseXMLEnd);
-XML_SetUserData(xmlParser, this);
+    shutdown(m_listenSocket, SHUT_RDWR);
+    close(m_listenSocket);
+    return 0;
+}

 
 

-while(nonstop)
+void CONFIGPROTO::Run()
+{
+    while (m_running)

     {
     {

-    strncpy(str, (*n).c_str(), 8);
-    str[8] = 0;
-    len = strlen(str);
+        fd_set fds;

 
 

-    n++;
-    if (n == requestList.end())
-        done = 1;
-    n--;
+        BuildFDSet(fds);

 
 

-    if (XML_Parse(xmlParser, (*n).c_str(), len, done) == XML_STATUS_ERROR)
-        {
-        WriteServLog("Invalid configuration request");
-        printfd(__FILE__, "Parse error at line %d:\n%s\n",
-           XML_GetCurrentLineNumber(xmlParser),
-           XML_ErrorString(XML_GetErrorCode(xmlParser)));
-        if (currParser)
-            {
-            printfd(__FILE__, "Parser reset\n");
-            currParser->Reset();
-            currParser = NULL;
-            }
+        struct timeval tv;
+        tv.tv_sec = 0;
+        tv.tv_usec = 500000;

 
 

-        return -1;
+        int res = select(MaxFD() + 1, &fds, NULL, NULL, &tv);
+        if (res < 0)
+        {
+            m_errorStr = std::string("'select' is failed: '") + strerror(errno) + "'.";
+            m_logger(m_errorStr);
+            break;

         }
         }

+        if (!m_running)
+            break;
+        if (res > 0)
+            HandleEvents(fds);

 
 

-    if (done)
-        return 0;
-
-    n++;
+        CleanupConns();

     }
     }

-
-return 0;
+    m_stopped = true;

 }
 }

-//-----------------------------------------------------------------------------
-void CONFIGPROTO::SetPort(uint16_t p)
+
+int CONFIGPROTO::MaxFD() const

 {
 {

-port = p;
+    int maxFD = m_listenSocket;
+    for (size_t i = 0; i < m_conns.size(); ++i)
+        if (maxFD < m_conns[i]->Sock())
+            maxFD = m_conns[i]->Sock();
+    return maxFD;

 }
 }

-//-----------------------------------------------------------------------------
-void CONFIGPROTO::SetAdmins(ADMINS * a)
+
+void CONFIGPROTO::BuildFDSet(fd_set & fds) const

 {
 {

-admins = a;
-for (unsigned int i = 0; i < dataParser.size(); i++)
-    {
-    dataParser[i]->SetAdmins(a);
-    }
+    for (size_t i = 0; i < m_conns.size(); ++i)
+        FD_SET(m_conns[i]->Sock(), &fds);
+}

 
 

+void CONFIGPROTO::CleanupConns()
+{
+    std::vector<STG::Conn *>::iterator pos;
+    pos = std::remove_if(m_conns.begin(), m_conns.end(), IsFinished());
+    if (pos == m_conns.end())
+        return;
+    std::for_each(pos, m_conns.end(), RemoveConn());
+    m_conns.erase(pos, m_conns.end());

 }
 }

-//-----------------------------------------------------------------------------
-void CONFIGPROTO::SetUsers(USERS * u)
+
+void CONFIGPROTO::HandleEvents(const fd_set & fds)

 {
 {

-for (unsigned int i = 0; i < dataParser.size(); i++)
+    if (FD_ISSET(m_listenSocket, &fds))
+        AcceptConnection();
+    else

     {
     {

-    dataParser[i]->SetUsers(u);
+        for (size_t i = 0; i < m_conns.size(); ++i)
+            if (FD_ISSET(m_conns[i]->Sock(), &fds))
+                m_conns[i]->Read();

     }
     }

-

 }
 }

-//-----------------------------------------------------------------------------
-void CONFIGPROTO::SetTariffs(TARIFFS * t)
+
+void CONFIGPROTO::AcceptConnection()

 {
 {

-for (unsigned int i = 0; i < dataParser.size(); i++)
+    struct sockaddr_in outerAddr;
+    socklen_t outerAddrLen(sizeof(outerAddr));
+    int sock = accept(m_listenSocket, reinterpret_cast<sockaddr *>(&outerAddr), &outerAddrLen);
+
+    if (sock < 0)

     {
     {

-    dataParser[i]->SetTariffs(t);
+        m_errorStr = std::string("Failed to accept connection: '") + strerror(errno) + "'.";
+        printfd(__FILE__, "%s", m_errorStr.c_str());
+        m_logger(m_errorStr);
+        return;

     }
     }

-}
-//-----------------------------------------------------------------------------
-void CONFIGPROTO::SetStore(BASE_STORE * s)
-{
-for (unsigned int i = 0; i < dataParser.size(); i++)
+
+    assert(m_settings != NULL);
+    assert(m_admins != NULL);
+    assert(m_users != NULL);
+    assert(m_tariffs != NULL);
+
+    try

     {
     {

-    dataParser[i]->SetStore(s);
+        m_conns.push_back(new STG::Conn(*m_settings, *m_admins, *m_users, *m_tariffs, sock, outerAddr));
+        printfd(__FILE__, "New connection from %s:%d\n", inet_ntostring(m_conns.back()->IP()).c_str(), m_conns.back()->Port());

     }
     }

-}
-//-----------------------------------------------------------------------------
-void CONFIGPROTO::SetStgSettings(const SETTINGS * s)
-{
-for (unsigned int i = 0; i < dataParser.size(); i++)
+    catch (const STG::Conn::Error & error)

     {
     {

-    dataParser[i]->SetStgSettings(s);
+        // Unlikely.
+        m_logger(std::string("Failed to create new client connection: '") + error.what() + "'.");

     }
 }
     }
 }

-//-----------------------------------------------------------------------------
-const string & CONFIGPROTO::GetStrError() const
-{
-return errorStr;
-}
-//-----------------------------------------------------------------------------
-uint32_t CONFIGPROTO::GetAdminIP() const
+/*
+void CONFIGPROTO::WriteLogAccessFailed(uint32_t ip)

 {
 {

-return adminIP;
+    m_logger("Admin's connection failed. IP %s", inet_ntostring(ip).c_str());

 }
 }

-//-----------------------------------------------------------------------------
+*/