/*
 * Copyright (C) 1999  Ross Combs (rocombs@cs.nmsu.edu)
 *
 * 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.
 */
#define VIRTCONN_INTERNAL_ACCESS
#include "common/setup_before.h"
#ifdef HAVE_STDDEF_H
# include <stddef.h>
#else
# ifndef NULL
#  define NULL ((void *)0)
# endif
#endif
#ifdef STDC_HEADERS
# include <stdlib.h>
#else
# ifdef HAVE_MALLOC_H
#  include <malloc.h>
# endif
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "compat/socket.h"
#include "compat/psock.h"
#include "common/queue.h"
#include "common/list.h"
#include "common/eventlog.h"
#include "virtconn.h"
#include "common/setup_after.h"


static t_list * virtconn_head=NULL;


extern t_virtconn * virtconn_create(int csd, int ssd, unsigned int udpaddr, unsigned short udpport)
{
    t_virtconn * temp=NULL;
    
    if (csd<0)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got bad client socket");
        return NULL;
    }
    if (ssd<0)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got bad server socket");
        return NULL;
    }
    
    if (!(temp = malloc(sizeof(t_virtconn))))
    {
        eventlog(eventlog_level_error,__FUNCTION__,"could not allocate memory for temp");
        return NULL;
    }
    
    temp->csd                   = csd;
    temp->ssd                   = ssd;
    temp->udpport               = udpport;
    temp->udpaddr               = udpaddr;
    temp->class                 = virtconn_class_none;
    temp->state                 = virtconn_state_initial;
    temp->coutqueue             = NULL;
    temp->coutsize              = 0;
    temp->cinqueue              = NULL;
    temp->cinsize               = 0;
    temp->soutqueue             = NULL;
    temp->soutsize              = 0;
    temp->sinqueue              = NULL;
    temp->sinsize               = 0;
    temp->fileleft              = 0;
    
    if (list_prepend_data(virtconn_head,temp)<0)
    {
        free(temp);
        eventlog(eventlog_level_error,__FUNCTION__,"could not prepend temp");
        return NULL;
    }
    
    return temp;
}


extern void virtconn_destroy(t_virtconn * vc)
{
    t_elem * curr;

    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL virtconn");
        return;
    }
    if (list_remove_data(virtconn_head,vc, &curr)<0)
	eventlog(eventlog_level_error,__FUNCTION__,"could not remove item from list");
    
    vc->state = virtconn_state_empty;
    
    psock_close(vc->ssd);
    psock_close(vc->csd);
    
    /* clear out the packet queues */
    queue_clear(&vc->sinqueue);
    queue_clear(&vc->soutqueue);
    queue_clear(&vc->cinqueue);
    queue_clear(&vc->coutqueue);
    
    eventlog(eventlog_level_info,__FUNCTION__,"[%d] closed server connection (%d) class=%d",vc->ssd,vc->csd,(int)vc->class);
    eventlog(eventlog_level_info,__FUNCTION__,"[%d] closed client connection (%d) class=%d",vc->csd,vc->ssd,(int)vc->class);
    
    free(vc);
}


extern t_virtconn_class virtconn_get_class(t_virtconn const * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL virtconn");
        return virtconn_class_none;
    }

    return vc->class;
}


extern void virtconn_set_class(t_virtconn * vc, t_virtconn_class class)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL virtconn");
        return;
    }
    
    vc->class = class;
}


extern t_virtconn_state virtconn_get_state(t_virtconn const * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL virtconn");
        return virtconn_state_empty;
    }
    
    return vc->state;
}


extern void virtconn_set_state(t_virtconn * vc, t_virtconn_state state)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL virtconn");
        return;
    }
    
    vc->state = state;
}


extern unsigned int virtconn_get_udpaddr(t_virtconn const * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL virtconn");
        return 0;
    }
    
    return vc->udpaddr;
}


extern unsigned short virtconn_get_udpport(t_virtconn const * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL virtconn");
        return 0;
    }
    
    return vc->udpport;
}


extern t_queue * * virtconn_get_clientin_queue(t_virtconn * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return NULL;
    }

    return &vc->cinqueue;
}


extern int virtconn_get_clientin_size(t_virtconn const * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return -1;
    }

    return vc->cinsize;
}


extern void virtconn_set_clientin_size(t_virtconn * vc, unsigned int size)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return;
    }

    vc->cinsize = size;
}


extern t_queue * * virtconn_get_clientout_queue(t_virtconn * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return NULL;
    }

    return &vc->coutqueue;
}


extern int virtconn_get_clientout_size(t_virtconn const * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return -1;
    }

    return vc->coutsize;
}


extern void virtconn_set_clientout_size(t_virtconn * vc, unsigned int size)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return;
    }

    vc->coutsize = size;
}


extern int virtconn_get_client_socket(t_virtconn const * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL virtconn");
	return -1;
    }
    return vc->csd;
}


extern t_queue * * virtconn_get_serverin_queue(t_virtconn * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return NULL;
    }

    return &vc->sinqueue;
}


extern int virtconn_get_serverin_size(t_virtconn const * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return -1;
    }

    return vc->sinsize;
}


extern void virtconn_set_serverin_size(t_virtconn * vc, unsigned int size)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return;
    }

    vc->sinsize = size;
}


extern t_queue * * virtconn_get_serverout_queue(t_virtconn * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return NULL;
    }

    return &vc->soutqueue;
}


extern int virtconn_get_serverout_size(t_virtconn const * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return -1;
    }

    return vc->soutsize;
}


extern void virtconn_set_serverout_size(t_virtconn * vc, unsigned int size)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL connection");
        return;
    }

    vc->soutsize = size;
}


extern int virtconn_get_server_socket(t_virtconn const * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL virtconn");
	return -1;
    }
    return vc->ssd;
}


extern void virtconn_set_fileleft(t_virtconn * vc, unsigned int size)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL virtconn");
	return;
    }
    vc->fileleft = size;
}


extern unsigned int virtconn_get_fileleft(t_virtconn const * vc)
{
    if (!vc)
    {
        eventlog(eventlog_level_error,__FUNCTION__,"got NULL virtconn");
	return 0;
    }
    return vc->fileleft;
}


extern int virtconnlist_create(void)
{
    if (!(virtconn_head = list_create()))
	return -1;
    return 0;
}


extern int virtconnlist_destroy(void)
{
    if (list_destroy(virtconn_head)<0)
	return -1;
    virtconn_head = NULL;
    return 0;
}


extern t_list * virtconnlist(void)
{
    return virtconn_head;
}