/*
 *This is the root component of the SqueakEasy.
 *[Header with internal data structures and information]
 *
 * Copyright 2003 Joseph Pingenot

    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

  *
  *
  */

/*Our protocol versions.*/
#define SQKRT_SUBJ_BADPROTO 0
#define SQKRT_SUBJ_PROTOV1  1

/*Our protocol version 1 command numbers*/
#define SQKRT_SUBJ_BADCMD 0
#define SQKRT_SUBJ_QUIT 1

/*Returns a negative protocol version acknowledgement to the client.*/
void nak_subj_proto(int proto, int fd);

/*Returns a negative cmmand acknowledgement to the client.*/
void nak_subj_cmd(int proto, int fd);

/*Get the subject command from the line they sent
 *RETURNS:
 *  command number or BADCMD
 */
int get_subj_cmd(int proto, char *line, long int len);

/*Verify that the protocol version is one we know.*/
int subjectproto_isvalid(int proto);

/*Acknowledge the client's quit request.*/
void ack_subj_quit(int proto, int fd);

/*This opens up the conversation and checks the protcol version.
 *RETURNS:
 * protcol version or BADPROTO
 */
int do_subject_pleasantries(int fd);

/*This processes the subject's command.  It acts as a central dispatch
 * routine to other internal handlers.
 *RETURNS:
 * command actually processed (NOTE: this can return QUIT command or
 *      BADCMD even though it didn't necessarily come as a QUIT or
 *      BADCMD from get_subj_cmd!!!!
 */
int process_subj_cmd(int proto, int cmd_type, int fd);