FRClient.cc

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//
// ********************************************************************
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// * technical work of the GEANT4 collaboration.                      *
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//
//
// $Id$
//
// FRClient.cc
// FukuiRenderer Client
// Yasuhide Sawada & Satoshi Tanaka


//=================//
#ifndef WIN32
//=================//


//=================//
#ifdef G4VIS_BUILD_VRML_DRIVER
//=================//


#include "G4ios.hh"
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <fcntl.h>

#include <unistd.h>
#include <string.h>
#include <stdio.h>

#include "G4VisManager.hh"
#include "FRClient.h"

FRClient::FRClient()
{
    fd = -1;
    create();
}

FRClient::~FRClient()
{
    close();
}

int FRClient::create()
{
    /* stream socket */
    fd = socket(AF_INET, SOCK_STREAM, 0);
    if (fd < 0)
        fputs("error: socket.\n", stderr);
    return fd;
}



int FRClient::connect(const char *hostname, int port_)
{
    // local variables
    struct sockaddr_in sa;
    struct hostent *hp;

    // set port ( sa.sin_family,  sa.sin_port )
    port = port_;  // Store port number to data member
    memset( (char *)&sa, '\0', sizeof(sa)) ;
    sa.sin_family = AF_INET;
    sa.sin_port = htons(port);

    // set server host ( sa.sin_addr )
    if (hostname == NULL) {
        hostname = "localhost"; 
            // reset arg 
    }
    hp = gethostbyname(hostname) ;
    if ( !hp ) {
      if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
        G4cout << "ERROR: gethostbyname() failed" << G4endl;
      return -1; 
    }

    memcpy( (char * )&sa.sin_addr, (char * )hp->h_addr, hp->h_length );

    // make connection to server
    if (::connect(fd, (struct sockaddr *)&sa, sizeof(sa)) == -1) {
        fputs("error: connect\n", stderr);
        return -1;
    }

    // return file descripter (data member)
    return fd;
}



int FRClient::send(const char *sendbuf)
{
    int len = strlen(sendbuf);

    if (::send(fd, sendbuf, len, 0) < 0) {
        fputs("error: Send()\n", stderr);
        len = -1;
    }
    return len;
}

int FRClient::receive(char *recvbuf)
{
    int len;

    memset(recvbuf, '\0', FRSendLength + 1);
    len = ::recv(fd, recvbuf, FRSendLength, 0);
    if(len < 0) {
        fputs("error: Receive()\n", stderr);
        len = -1;
    }
    return len;
}

int FRClient::close()
{
    /*
        shutdown :argument '2' means shutdown both send and receive.
    */
    if (::shutdown(fd, 2) < 0) {
        fputs("error: shutdown\n", stderr);
        return -1;
    }
    ::close(fd);
    return 0;
}

#endif //G4VIS_BUILD_VRML_DRIVER

#endif // WIN32