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/*
* This file is part of rasdaman community.
*
* Rasdaman community 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 3 of the License, or
* (at your option) any later version.
*
* Rasdaman community 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 rasdaman community. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
rasdaman GmbH.
*
* For more information please see <http://www.rasdaman.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
*/
/*************************************************************
*
*
* PURPOSE:
*
*
* COMMENTS:
* - why sometimes exit() and sometimes return on error?
* should be return or exception, always.
*
************************************************************/
#include "srvrasmgrcomm.hh"
#include<stdio.h>
#include<errno.h>
#include<stdlib.h>
#include<unistd.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<netdb.h>
#include<iostream>
#include<string.h>
#include "raslib/rminit.hh"
#include "debug.hh"
// exit code of the server when communication is impossible
// PB: Why 10 ? Anyway, should not use exit in a server, how often did I tell you, Walter Schatz!!!
const unsigned int EXIT_CODE = 10;
// max number of retries to connect to rasmgr in informRasMgr()
const unsigned int SRV_MAX_RETRY = 10000000;
// how many retries are attempted before a message is issued informRasMgr()
const unsigned int SRV_TALK_INTERVAL = 100000;
SrvRasmgrComm rasmgrComm;
SrvRasmgrComm::SrvRasmgrComm()
{
timeout = 0;
serverName = 0;
rasmgrHost = 0;
rasmgrPort = -1;
}
// note: should make use of timeout as defined in cmd line,
// but that's a major undertaking -- PB 2005-sep-02
void SrvRasmgrComm::init(unsigned int timeOut, const char* instanceName, const char* nRasmgrHost, int nRasmgrPort)
{
timeout = timeOut;
serverName = instanceName;
rasmgrHost = nRasmgrHost;
rasmgrPort = nRasmgrPort;
}
unsigned int SrvRasmgrComm::getTimeout()
{
return timeout;
}
void SrvRasmgrComm::informRasmgrServerAvailable()
{
informRasMGR(SERVER_AVAILABLE);
}
void SrvRasmgrComm::informRasmgrServerDown()
{
informRasMGR(SERVER_DOWN);
}
void SrvRasmgrComm::informRasmgrServerStillAvailable()
{
// too verbose, blows up log file
// RMInit::logOut << "informing rasmgr: server still available." << endl;
informRasMGR(SERVER_REGULARSIG);
}
void SrvRasmgrComm::informRasMGR(int what)
{ //what: 0 - going down
// 1 - available
// 2 - regular signal
// cout<<"servername ="<<serverName<<" rasmgrhost="<<rasmgrHost<<" port="<<rasmgrPort<<endl;
// if(what == SERVER_AVAILABLE) accessControl.resetForNewClient();
struct protoent* getprotoptr = getprotobyname("tcp");
struct hostent *hostinfo = gethostbyname(rasmgrHost);
if(hostinfo==NULL)
{
RMInit::logOut << "Error: cannot locate rasmgr host '" << rasmgrHost << "': " << strerror(errno) << std::endl;
return;
}
sockaddr_in internetSocketAddress;
internetSocketAddress.sin_family = AF_INET;
internetSocketAddress.sin_port=htons(rasmgrPort);
internetSocketAddress.sin_addr=*(struct in_addr*)hostinfo->h_addr;
int sock;
bool ok=false;
long talkInterval=SRV_TALK_INTERVAL;
long maxRetry=SRV_MAX_RETRY;
long retry =0;
// creating socket
for(retry=0;retry<maxRetry;retry++)
{
sock=socket(PF_INET,SOCK_STREAM,getprotoptr->p_proto);
//std::cout<<"Socket="<<sock<<" protocol(tcp)="<<getprotoptr->p_proto<<std::endl;
if(sock<0)
{
if( (retry%talkInterval) == 0)
{
std::cerr<< "Error: server '" << serverName << " cannot open socket to rasmgr (" << retry << " attempts, still retrying): " << strerror(errno) << std::endl;
RMInit::logOut << "Error: server '" << serverName << " cannot open socket to rasmgr (" << retry << " attempts, still retrying): " << strerror(errno) << std::endl;
}
continue;
}
if(connect(sock,(struct sockaddr*)&internetSocketAddress,sizeof(internetSocketAddress)) < 0)
{
if( (retry%talkInterval) == 0)
{
std::cerr << "Error: server '" << serverName << " cannot connect to rasmgr (" << retry << " attempts, still retrying): " << strerror(errno) << std::endl;
RMInit::logOut << "Error: server '" << serverName << " cannot connect to rasmgr (" << retry << " attempts, still retrying): " << strerror(errno) << std::endl;
}
close(sock); //yes, some SO requieres this, like DEC from BLVA
continue;
}
ok = true;
break;
}
if( !ok )
{
std::cerr << "Error: unable to contact rasmgr, server '" << serverName << "' herewith giving up." <<std::endl;
RMInit::logOut << "Error: unable to contact rasmgr, server '" << serverName << "' herewith giving up." <<std::endl;
if(sock)
close(sock);
exit( EXIT_CODE );
}
// creating the HTTP message
char message[200];
sprintf(message,"%s%d\r\n\r\n%s %d %ld ","POST rasservernewstatus HTTP/1.1\r\nUserAgent: RasServer/1.0\r\nContent-length: ",strlen(serverName)+3,serverName,what,0);
// writing message;
if(writeWholeMessage(sock,message,strlen(message)+1)<0)
{
std::cerr << "Error: cannot send message to rasmgr: " << strerror(errno) << std::endl;
RMInit::logOut << "Error: cannot send message to rasmgr: " << strerror(errno) << std::endl;
close(sock);
exit( EXIT_CODE );
}
close(sock);
}
int SrvRasmgrComm::writeWholeMessage(int socket,char *destBuffer,int buffSize)
{
// we write the whole message, including the ending '\0', which is already in
// the buffSize provided by the caller
int totalLength=0;
int writeNow;
while(1)
{
writeNow = write(socket,destBuffer+totalLength,buffSize-totalLength);
if(writeNow == -1)
{
if(errno == EINTR)
continue; // read was interrupted by signal (on bad SO's)
return -1; // another error
}
totalLength+=writeNow;
if( totalLength==buffSize )
break; // THE END
}
return totalLength;
}
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