// Copyright (C) 1999,2000 Bruce Guenter <bruceg@em.ca>

//

// 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

#include <config.h>

#include <unistd.h>

#include "response.h"

static mystring receive_string(int fd)

{

  unsigned char lenbuf[2];

  if(read(fd, lenbuf, 2) != 2)

    return "";

  ssize_t len = lenbuf[0] << 8 | lenbuf[1];

  char buf[len+1];

  if(read(fd, buf, len) != len)

    return "";

  return mystring(buf, len);

}

static response read_response(int fd)

{

  response::response_code code;

  mystring msg;

  unsigned char c;

  if(read(fd, &c, 1) != 1) {

    code = response::econn;

    msg = "Sender aborted the data connection";

  }

  else {

    msg = receive_string(fd);

    switch(c) {

    case 0:

    case 1:

    case 2:

      code = (response::response_code)c;

      break;

    default:

      code = response::econn;

      msg = "Invalid data received from sender";

    }

  }

  return response(code, msg);

}

response response::read(int fd)

{

  return read_response(fd);

}