/*      $OpenBSD: ipcp.h,v 1.8 2024/08/09 05:16:13 deraadt Exp $        */

/*
 * ipcp.h - IP Control Protocol definitions.
 *
 * Copyright (c) 1984-2000 Carnegie Mellon University. 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 "Carnegie Mellon University" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For permission or any legal
 *    details, please contact
 *      Office of Technology Transfer
 *      Carnegie Mellon University
 *      5000 Forbes Avenue
 *      Pittsburgh, PA  15213-3890
 *      (412) 268-4387, fax: (412) 268-7395
 *      tech-transfer@andrew.cmu.edu
 *
 * 4. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by Computing Services
 *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
 *
 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY 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.
 */

/*
 * Options.
 */
#define CI_ADDRS        1       /* IP Addresses */
#define CI_COMPRESSTYPE 2       /* Compression Type */
#define CI_ADDR         3

#define CI_MS_DNS1      129     /* Primary DNS value */
#define CI_MS_WINS1     130     /* Primary WINS value */
#define CI_MS_DNS2      131     /* Secondary DNS value */
#define CI_MS_WINS2     132     /* Secondary WINS value */

#define MAX_STATES 16           /* from slcompress.h */

#define IPCP_VJMODE_OLD 1       /* "old" mode (option # = 0x0037) */
#define IPCP_VJMODE_RFC1172 2   /* "old-rfc"mode (option # = 0x002d) */
#define IPCP_VJMODE_RFC1332 3   /* "new-rfc"mode (option # = 0x002d, */
                                /*  maxslot and slot number compression) */

#define IPCP_VJ_COMP 0x002d     /* current value for VJ compression option*/
#define IPCP_VJ_COMP_OLD 0x0037 /* "old" (i.e, broken) value for VJ */
                                /* compression option*/ 

typedef struct ipcp_options {
    u_int neg_addr : 1;         /* Negotiate IP Address? */
    u_int old_addrs : 1;        /* Use old (IP-Addresses) option? */
    u_int req_addr : 1;         /* Ask peer to send IP address? */
    u_int default_route : 1;    /* Assign default route through interface? */
    u_int proxy_arp : 1;                /* Make proxy ARP entry for peer? */
    u_int neg_vj : 1;           /* Van Jacobson Compression? */
    u_int old_vj : 1;           /* use old (short) form of VJ option? */
    u_int accept_local : 1;     /* accept peer's value for ouraddr */
    u_int accept_remote : 1;    /* accept peer's value for hisaddr */
    u_short vj_protocol;        /* protocol value to use in VJ option */
    u_char maxslotindex, cflag; /* values for RFC1332 VJ compression neg. */
    u_int32_t ouraddr, hisaddr; /* Addresses in NETWORK BYTE ORDER */
    u_int32_t dnsaddr[2];       /* Primary and secondary MS DNS entries */
    u_int32_t winsaddr[2];      /* Primary and secondary MS WINS entries */
} ipcp_options;

extern fsm ipcp_fsm[];
extern ipcp_options ipcp_wantoptions[];
extern ipcp_options ipcp_gotoptions[];
extern ipcp_options ipcp_allowoptions[];
extern ipcp_options ipcp_hisoptions[];

char *ip_ntoa(u_int32_t);

extern struct protent ipcp_protent;