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/*
* dhcpcd - DHCP client daemon
* Copyright (c) 2006-2013 Roy Marples <roy@marples.name>
* 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 DHCPCOMMON_H
#define DHCPCOMMON_H
#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdint.h>
#include "common.h"
/* Max MTU - defines dhcp option length */
#define MTU_MAX 1500
#define MTU_MIN 576
#define REQUEST (1 << 0)
#define UINT8 (1 << 1)
#define UINT16 (1 << 2)
#define SINT16 (1 << 3)
#define UINT32 (1 << 4)
#define SINT32 (1 << 5)
#define ADDRIPV4 (1 << 6)
#define STRING (1 << 7)
#define ARRAY (1 << 8)
#define RFC3361 (1 << 9)
#define RFC3397 (1 << 10)
#define RFC3442 (1 << 11)
#define RFC5969 (1 << 12)
#define ADDRIPV6 (1 << 13)
#define BINHEX (1 << 14)
#define FLAG (1 << 15)
#define NOREQ (1 << 16)
#define EMBED (1 << 17)
#define ENCAP (1 << 18)
#define INDEX (1 << 19)
#define OPTION (1 << 20)
struct dhcp_opt {
uint32_t option; /* Also used for IANA Enterpise Number */
int type;
int len;
char *var;
int index; /* Index counter for many instances of the same option */
/* Embedded options.
* The option code is irrelevant here. */
struct dhcp_opt *embopts;
size_t embopts_len;
/* Encapsulated options */
struct dhcp_opt *encopts;
size_t encopts_len;
};
/* DHCP Vendor-Identifying Vendor Options, RFC3925 */
extern struct dhcp_opt *vivso;
extern size_t vivso_len;
struct dhcp_opt *vivso_find(uint16_t, const void *);
#define add_option_mask(var, val) (var[val >> 3] |= 1 << (val & 7))
#define del_option_mask(var, val) (var[val >> 3] &= ~(1 << (val & 7)))
#define has_option_mask(var, val) (var[val >>3] & (1 << (val & 7)))
int make_option_mask(const struct dhcp_opt *, size_t,
uint8_t *, const char *, int);
size_t encode_rfc1035(const char *src, uint8_t *dst);
ssize_t decode_rfc3397(char *, ssize_t, int, const uint8_t *);
ssize_t print_string(char *, ssize_t, int, const uint8_t *);
ssize_t print_option(char *, ssize_t, int, int, const uint8_t *, const char *);
ssize_t dhcp_envoption(char **, const char *, const char *, struct dhcp_opt *,
const uint8_t *(*dgetopt)(unsigned int *, unsigned int *, unsigned int *,
const uint8_t *, unsigned int, struct dhcp_opt **),
const uint8_t *od, int ol);
void dhcp_zero_index(struct dhcp_opt *);
#endif
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