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106 lines
3.5 KiB
C
106 lines
3.5 KiB
C
/*
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* dhcpcd - DHCP client daemon
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* Copyright (c) 2006-2013 Roy Marples <roy@marples.name>
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* All rights reserved
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef DHCPCOMMON_H
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#define DHCPCOMMON_H
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <stdint.h>
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#include "common.h"
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/* Max MTU - defines dhcp option length */
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#define MTU_MAX 1500
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#define MTU_MIN 576
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#define REQUEST (1 << 0)
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#define UINT8 (1 << 1)
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#define UINT16 (1 << 2)
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#define SINT16 (1 << 3)
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#define UINT32 (1 << 4)
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#define SINT32 (1 << 5)
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#define ADDRIPV4 (1 << 6)
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#define STRING (1 << 7)
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#define ARRAY (1 << 8)
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#define RFC3361 (1 << 9)
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#define RFC3397 (1 << 10)
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#define RFC3442 (1 << 11)
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#define RFC5969 (1 << 12)
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#define ADDRIPV6 (1 << 13)
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#define BINHEX (1 << 14)
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#define FLAG (1 << 15)
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#define NOREQ (1 << 16)
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#define EMBED (1 << 17)
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#define ENCAP (1 << 18)
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#define INDEX (1 << 19)
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#define OPTION (1 << 20)
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struct dhcp_opt {
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uint32_t option; /* Also used for IANA Enterpise Number */
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int type;
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int len;
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char *var;
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int index; /* Index counter for many instances of the same option */
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/* Embedded options.
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* The option code is irrelevant here. */
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struct dhcp_opt *embopts;
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size_t embopts_len;
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/* Encapsulated options */
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struct dhcp_opt *encopts;
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size_t encopts_len;
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};
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/* DHCP Vendor-Identifying Vendor Options, RFC3925 */
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extern struct dhcp_opt *vivso;
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extern size_t vivso_len;
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struct dhcp_opt *vivso_find(uint16_t, const void *);
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#define add_option_mask(var, val) (var[val >> 3] |= 1 << (val & 7))
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#define del_option_mask(var, val) (var[val >> 3] &= ~(1 << (val & 7)))
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#define has_option_mask(var, val) (var[val >>3] & (1 << (val & 7)))
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int make_option_mask(const struct dhcp_opt *, size_t,
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uint8_t *, const char *, int);
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size_t encode_rfc1035(const char *src, uint8_t *dst);
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ssize_t decode_rfc3397(char *, ssize_t, int, const uint8_t *);
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ssize_t print_string(char *, ssize_t, int, const uint8_t *);
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ssize_t print_option(char *, ssize_t, int, int, const uint8_t *, const char *);
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ssize_t dhcp_envoption(char **, const char *, const char *, struct dhcp_opt *,
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const uint8_t *(*dgetopt)(unsigned int *, unsigned int *, unsigned int *,
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const uint8_t *, unsigned int, struct dhcp_opt **),
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const uint8_t *od, int ol);
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void dhcp_zero_index(struct dhcp_opt *);
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#endif
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