/*      $OpenBSD: psm-opt.h,v 1.5 2012/05/08 13:18:37 yasuoka Exp $ */

/*-
 * Copyright (c) 2009 Internet Initiative Japan 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
#ifndef PSM_H
#define PSM_H   1

/**@file
 * This files provides helper macros for negotiating configuration options.
 *<p>Example:<pre>
 *  struct lcp {
 *      struct {
 *          uint8_t     pfc;    // bit flags for LCP PFC option
 *          uint8_t     acfc;   // bit flags for LCP ACFC option
 *      } opt;
 *  }
 * if (psm_opt_is_accepted(lcp, pfc)) {
 *      // We've accepted "Protocol Field Compression" option.
 * }
 * // Mark peer rejects "Address and Control Field Compression" option.
 * psm_peer_opt_set_reject(lcp, acfc, true)
 * </pre></p>
 * $Id: psm-opt.h,v 1.5 2012/05/08 13:18:37 yasuoka Exp $
 */

#define PSM_OPT_REQUEST_OURS            0x01
#define PSM_OPT_ACCEPT_OURS             0x02
#define PSM_OPT_REJECT_OURS             0x04
#define PSM_OPT_ENABLED_OURS            0x08

#define PSM_OPT_REQUEST_PEERS           0x10
#define PSM_OPT_ACCEPT_PEERS            0x20
#define PSM_OPT_REJECT_PEERS            0x40
#define PSM_OPT_ENABLED_PEERS           0x80

#define psm_peer_opt_is_requested(psm, confopt)                         \
        (((psm)->opt.confopt & PSM_OPT_REQUEST_PEERS) != 0)
#define psm_peer_opt_set_requested(psm, confopt, boolval)               \
        do {                                                            \
                if ((boolval)) {                                        \
                        (psm)->opt.confopt |= PSM_OPT_REQUEST_PEERS;    \
                } else {                                                \
                        (psm)->opt.confopt &= ~PSM_OPT_REQUEST_PEERS;   \
                }                                                       \
        } while (0)
#define psm_opt_is_requested(psm, confopt)                              \
        (((psm)->opt.confopt & PSM_OPT_REQUEST_OURS) != 0)
#define psm_opt_set_requested(psm, confopt, boolval)                    \
        do {                                                            \
                if ((boolval)) {                                        \
                        (psm)->opt.confopt |= PSM_OPT_REQUEST_OURS;     \
                } else {                                                \
                        (psm)->opt.confopt &= ~PSM_OPT_REQUEST_OURS;    \
                }                                                       \
        } while (0)
#define psm_peer_opt_is_accepted(psm, confopt)                          \
        (((psm)->opt.confopt & PSM_OPT_ACCEPT_PEERS) != 0)
#define psm_peer_opt_set_accepted(psm, confopt, boolval)                \
        do {                                                            \
                if ((boolval)) {                                        \
                        (psm)->opt.confopt |= PSM_OPT_ACCEPT_PEERS;     \
                } else {                                                \
                        (psm)->opt.confopt &= ~PSM_OPT_ACCEPT_PEERS;    \
                }                                                       \
        } while (0)
#define psm_opt_is_accepted(psm, confopt)                               \
        (((psm)->opt.confopt & PSM_OPT_ACCEPT_OURS) != 0)
#define psm_opt_set_accepted(psm, confopt, boolval)                     \
        do {                                                            \
                if ((boolval)) {                                        \
                        (psm)->opt.confopt |= PSM_OPT_ACCEPT_OURS;      \
                } else {                                                \
                        (psm)->opt.confopt &= ~PSM_OPT_ACCEPT_OURS;     \
                }                                                       \
        } while (0)
#define psm_peer_opt_is_rejected(psm, confopt)                          \
        (((psm)->opt.confopt & PSM_OPT_REJECT_PEERS) != 0)
#define psm_peer_opt_set_rejected(psm, confopt, boolval)                \
        do {                                                            \
                if ((boolval)) {                                        \
                        (psm)->opt.confopt |= PSM_OPT_REJECT_PEERS;     \
                } else {                                                \
                        (psm)->opt.confopt &= ~PSM_OPT_REJECT_PEERS;    \
                }                                                       \
        } while (0)
#define psm_opt_is_rejected(psm, confopt)                               \
        (((psm)->opt.confopt & PSM_OPT_REJECT_OURS) != 0)
#define psm_opt_set_rejected(psm, confopt, boolval)                     \
        do {                                                            \
                if ((boolval)) {                                        \
                        (psm)->opt.confopt |= PSM_OPT_REJECT_OURS;      \
                } else {                                                \
                        (psm)->opt.confopt &= ~PSM_OPT_REJECT_OURS;     \
                }                                                       \
        } while (0)
#define psm_peer_opt_is_enabled(psm, confopt)                           \
        (((psm)->opt.confopt & PSM_OPT_ENABLED_PEERS) != 0)
#define psm_peer_opt_set_enabled(psm, confopt, boolval)                 \
        do {                                                            \
                if ((boolval)) {                                        \
                        (psm)->opt.confopt |= PSM_OPT_ENABLED_PEERS;    \
                } else {                                                \
                        (psm)->opt.confopt &= ~PSM_OPT_ENABLED_PEERS;   \
                }                                                       \
        } while (0)
#define psm_opt_is_enabled(psm, confopt)                                \
        (((psm)->opt.confopt & PSM_OPT_ENABLED_OURS) != 0)
#define psm_opt_set_enabled(psm, confopt, boolval)                      \
        do {                                                            \
                if ((boolval)) {                                        \
                        (psm)->opt.confopt |= PSM_OPT_ENABLED_OURS;     \
                } else {                                                \
                        (psm)->opt.confopt &= ~PSM_OPT_ENABLED_OURS;    \
                }                                                       \
        } while (0)
#endif