src/network.cc


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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            network.cc
 *
 *  Wed Nov  3 21:23:14 CET 2004
 *  Copyright  2004 Bent Bisballe
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  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 Library 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.
 */

#include <config.h>
#include "network.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/socket.h> 

Network::Network(Socket *gs)
{
  s = gs;
}

Network::~Network()
{
}

int Network::write(void *buf, int size)
{
  if(!s->isConnected()) {
    fprintf(stderr, "Write attempted to a socket not connected!\n");
    return 0;
  }
  int n = send(s->ssocket, buf, size, MSG_WAITALL);

  if(n == -1) printf("An error occurred!\n");

  //  printf("Sent: %s\n", buf);

  return n;
}

int Network::read(void *buf, int size)
{
  if(!s->isConnected()) {
    fprintf(stderr, "Read attempted from a socket not connected!\n");
    return 0;
  }
  int n = recv(s->ssocket, buf, size, MSG_WAITALL);

  if(n == -1) printf("An error occurred!\n");
  
  //  printf("Recieved: %s\n", buf);

  return n;
}

/*
struct  msghdr {
  void          *msg_name        // Optional address.
  socklen_t      msg_namelen     // Size of address.
  struct iovec  *msg_iov         // Scatter/gather array.
  int            msg_iovlen      // Members in msg_iov.
  void          *msg_control     // Ancillary data; see below.
  socklen_t      msg_controllen  // Ancillary data buffer len.
  int            msg_flags       // Flags on received message.
};
*/

int Network::sendPackage(n_header *h, void* buf, int bufsz)
{
  struct msghdr msg;
  struct iovec iovecs[2];

  memset(&msg, 0, sizeof(msg));
  
  msg.msg_iov = iovecs;
  msg.msg_iovlen = 2;

  msg.msg_iov[0].iov_base = h;
  msg.msg_iov[0].iov_len = sizeof(*h);

  msg.msg_iov[1].iov_base = buf;
  msg.msg_iov[1].iov_len = bufsz;

  int n = sendmsg(s->ssocket, &msg, 0);
  if(n < 0) {
    perror("sendmsg");
    return -1;
  }

  return n;
}

int Network::recvPackage(n_header *h, void* buf, int bufsz)
{	
  struct msghdr msg;
  struct iovec iovecs[2];

  memset(&msg, 0, sizeof(msg));
  
  iovecs[0].iov_base = h;
  iovecs[0].iov_len = sizeof(*h);
  
  iovecs[1].iov_base = buf;
  iovecs[1].iov_len = bufsz;
  
  msg.msg_iov = iovecs;
  msg.msg_iovlen = 2;

  int n = recvmsg(s->ssocket, &msg, MSG_WAITALL);

  if(n < 0) {
    perror("recvmsg");
    return -1;
  }

  if(msg.msg_iovlen != 2) {
    fprintf(stderr, "Wrong package format!\n");
    return -1;
  }
  return n;
}