/*      $OpenBSD: pdu.h,v 1.1 2025/05/02 06:12:53 dlg Exp $ */

/*
 * Copyright (c) 2024 David Gwynne <dlg@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, 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.
 */

struct tlv {
        const void              *tlv_payload;

        unsigned int             tlv_type;
        unsigned int             tlv_len;

        unsigned int             tlv_offset;
};

uint16_t        pdu_u16(const uint8_t *);
uint32_t        pdu_u32(const uint8_t *);

int             tlv_first(struct tlv *, const void *, size_t);
int             tlv_next(struct tlv *, const void *, size_t);