/*      $NetBSD: ecp.c,v 1.6 2025/01/08 19:59:39 christos Exp $ */

/*
* ecp.c - PPP Encryption Control Protocol.
*
* Copyright (c) 2002 Google, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in
*    the documentation and/or other materials provided with the
*    distribution.
*
* 3. The name(s) of the authors of this software must not be used to
*    endorse or promote products derived from this software without
*    prior written permission.
*
* THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Derived from ccp.c, which is:
*
* Copyright (c) 1994-2024 Paul Mackerras. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in
*    the documentation and/or other materials provided with the
*    distribution.
*
* THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include <sys/cdefs.h>
__RCSID("$NetBSD: ecp.c,v 1.6 2025/01/08 19:59:39 christos Exp $");

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <string.h>

#include "pppd-private.h"
#include "options.h"
#include "fsm.h"
#include "ecp.h"

static struct option ecp_option_list[] = {
   { "noecp", o_bool, &ecp_protent.enabled_flag,
     "Disable ECP negotiation" },
   { "-ecp", o_bool, &ecp_protent.enabled_flag,
     "Disable ECP negotiation", OPT_ALIAS },

   { NULL }
};

/*
* Protocol entry points from main code.
*/
static void ecp_init (int unit);
/*
static void ecp_open (int unit);
static void ecp_close (int unit, char *);
static void ecp_lowerup (int unit);
static void ecp_lowerdown (int);
static void ecp_input (int unit, u_char *pkt, int len);
static void ecp_protrej (int unit);
*/
static int  ecp_printpkt (u_char *pkt, int len,
                         void (*printer)(void *, char *, ...),
                         void *arg);
/*
static void ecp_datainput (int unit, u_char *pkt, int len);
*/

struct protent ecp_protent = {
   PPP_ECP,
   ecp_init,
   NULL, /* ecp_input, */
   NULL, /* ecp_protrej, */
   NULL, /* ecp_lowerup, */
   NULL, /* ecp_lowerdown, */
   NULL, /* ecp_open, */
   NULL, /* ecp_close, */
   ecp_printpkt,
   NULL, /* ecp_datainput, */
   0,
   "ECP",
   "Encrypted",
   ecp_option_list,
   NULL,
   NULL,
   NULL
};

fsm ecp_fsm[NUM_PPP];
ecp_options ecp_wantoptions[NUM_PPP];   /* what to request the peer to use */
ecp_options ecp_gotoptions[NUM_PPP];    /* what the peer agreed to do */
ecp_options ecp_allowoptions[NUM_PPP];  /* what we'll agree to do */
ecp_options ecp_hisoptions[NUM_PPP];    /* what we agreed to do */

static fsm_callbacks ecp_callbacks = {
   NULL, /* ecp_resetci, */
   NULL, /* ecp_cilen, */
   NULL, /* ecp_addci, */
   NULL, /* ecp_ackci, */
   NULL, /* ecp_nakci, */
   NULL, /* ecp_rejci, */
   NULL, /* ecp_reqci, */
   NULL, /* ecp_up, */
   NULL, /* ecp_down, */
   NULL,
   NULL,
   NULL,
   NULL,
   NULL, /* ecp_extcode, */
   "ECP"
};

/*
* ecp_init - initialize ECP.
*/
static void
ecp_init(int unit)
{
   fsm *f = &ecp_fsm[unit];

   f->unit = unit;
   f->protocol = PPP_ECP;
   f->callbacks = &ecp_callbacks;
   fsm_init(f);

   memset(&ecp_wantoptions[unit],  0, sizeof(ecp_options));
   memset(&ecp_gotoptions[unit],   0, sizeof(ecp_options));
   memset(&ecp_allowoptions[unit], 0, sizeof(ecp_options));
   memset(&ecp_hisoptions[unit],   0, sizeof(ecp_options));

}


static int
ecp_printpkt(u_char *p, int plen,
            void (*printer)(void *, char *, ...), void *arg)
{
   return 0;
}