/*
    connlist.c -- connection list management
    Copyright (C) 2000 Guus Sliepen <guus@sliepen.warande.net>,
                  2000 Ivo Timmermans <itimmermans@bigfoot.com>

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

    $Id: connlist.c,v 1.1.2.1 2000/10/11 10:35:15 guus Exp $
*/

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

#include "connlist.h"

/* Root of the connection list */

conn_list_t *conn_list = NULL;
conn_list_t *myself = NULL;

/* Creation and deletion of conn_list elements */

conn_list_t *new_conn_list(void)
{
  conn_list_t *p = xmalloc(sizeof(*p));
cp
  /* initialise all those stupid pointers at once */
  memset(p, '\0', sizeof(*p));
cp
  return p;
}

void free_conn_list(conn_list_t *p)
{
cp
  if(p->sq)
    destroy_queue(p->sq);
  if(p->rq)
    destroy_queue(p->rq);
  if(p->name)
    free(p->name);
  if(p->hostname)
    free(p->hostname);
  free_key(p->public_key);
  free_key(p->datakey);
  free(p);
cp
}

/*
  remove all marked connections
*/
void prune_conn_list(void)
{
  conn_list_t *p, *prev = NULL, *next = NULL;
cp
  for(p = conn_list; p != NULL; )
    {
      next = p->next;

      if(p->status.remove)
	{
	  if(prev)
	    prev->next = next;
	  else
	    conn_list = next;

	  free_conn_element(p);
	}
      else
	prev = p;

      p = next;
    }
cp
}

/*
  free all elements of conn_list
*/
void destroy_conn_list(void)
{
  conn_list_t *p, *next;
cp
  for(p = conn_list; p != NULL; )
    {
      next = p->next;
      free_conn_element(p);
      p = next;
    }

  conn_list = NULL;
cp
}

/* Linked list management */

void conn_list_add(conn_list_t *cl)
{
cp
  cl->next = connlist;
  cl->prev = NULL;
  cl->next->prev = cl;
  connlist = cl;
cp
}

void conn_list_del(conn_list_t *cl)
{
cp
  if(cl->prev)
    cl->prev->next = cl->next;
  else
    connlist = cl->next;
  
  cl->next->prev = cl->prev;
  free_conn_list(cl);
cp
}

/* Lookup functions */

conn_list_t *lookup_conn_list_mac(mac_t address)
{
  conn_list_t *p;
cp
  for(p = conn_list; p != NULL; p = p->next)
    if(lookup_subnet_mac(p, address))
      break;
cp
  return p;
}

conn_list_t *lookup_conn_list_ipv4(ipv4_t address)
{
  conn_list_t *p;
cp
  for(p = conn_list; p != NULL; p = p->next)
    if(lookup_subnet_ipv4(p, address))
      break;
cp
  return p;
}

conn_list_t *lookup_conn_list_ipv6(ipv6_t address)
{
  conn_list_t *p;
cp
  for(p = conn_list; p != NULL; p = p->next)
    if(lookup_subnet_ipv6(p, address))
      break;
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  return p;
}

/* Debugging */

void dump_conn_list(void)
{
  conn_list_t *p;
cp
  syslog(LOG_DEBUG, _("Connection list:"));

  for(p = conn_list; p != NULL; p = p->next)
    {
      syslog(LOG_DEBUG, _("%s netmask %d.%d.%d.%d at %s port %hd flags %d sockets %d, %d status %04x"),
	     p->name, IP_ADDR_V(p->vpn_mask), p->hostname, p->port, p->flags,
	     p->socket, p->meta_socket, p->status);
    }
cp
}