mirror of
https://github.com/rsmarples/dhcpcd.git
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124 lines
4.1 KiB
C
124 lines
4.1 KiB
C
/*
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* dhcpcd - DHCP client daemon
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* Copyright (c) 2006-2015 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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#include "dhcpcd.h"
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/* Max MTU - defines dhcp option length */
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#define IP_UDP_SIZE 28
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#define MTU_MAX 1500 - IP_UDP_SIZE
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#define MTU_MIN 576 + IP_UDP_SIZE
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#define OT_REQUEST (1 << 0)
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#define OT_UINT8 (1 << 1)
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#define OT_INT8 (1 << 2)
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#define OT_UINT16 (1 << 3)
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#define OT_INT16 (1 << 4)
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#define OT_UINT32 (1 << 5)
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#define OT_INT32 (1 << 6)
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#define OT_ADDRIPV4 (1 << 7)
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#define OT_STRING (1 << 8)
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#define OT_ARRAY (1 << 9)
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#define OT_RFC3361 (1 << 10)
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#define OT_RFC1035 (1 << 11)
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#define OT_RFC3442 (1 << 12)
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#define OT_OPTIONAL (1 << 13)
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#define OT_ADDRIPV6 (1 << 14)
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#define OT_BINHEX (1 << 15)
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#define OT_FLAG (1 << 16)
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#define OT_NOREQ (1 << 17)
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#define OT_EMBED (1 << 18)
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#define OT_ENCAP (1 << 19)
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#define OT_INDEX (1 << 20)
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#define OT_OPTION (1 << 21)
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#define OT_DOMAIN (1 << 22)
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#define OT_ASCII (1 << 23)
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#define OT_RAW (1 << 24)
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#define OT_ESCSTRING (1 << 25)
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#define OT_ESCFILE (1 << 26)
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#define OT_BITFLAG (1 << 27)
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#define OT_RESERVED (1 << 28)
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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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size_t 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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char bitflags[8];
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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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const char *dhcp_get_hostname(char *, size_t, const struct if_options *);
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struct dhcp_opt *vivso_find(uint32_t, const void *);
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ssize_t dhcp_vendor(char *, size_t);
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void dhcp_print_option_encoding(const struct dhcp_opt *opt, int cols);
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#define add_option_mask(var, val) \
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((var)[(val) >> 3] = (uint8_t)((var)[(val) >> 3] | 1 << ((val) & 7)))
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#define del_option_mask(var, val) \
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((var)[(val) >> 3] = (uint8_t)((var)[(val) >> 3] & ~(1 << ((val) & 7))))
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#define has_option_mask(var, val) \
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((var)[(val) >> 3] & (uint8_t)(1 << ((val) & 7)))
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int make_option_mask(const struct dhcp_opt *, size_t,
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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_rfc1035(char *, size_t, const uint8_t *, size_t);
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ssize_t print_string(char *, size_t, int, const uint8_t *, size_t);
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int dhcp_set_leasefile(char *, size_t, int, const struct interface *);
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size_t dhcp_envoption(struct dhcpcd_ctx *,
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char **, const char *, const char *, struct dhcp_opt *,
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const uint8_t *(*dgetopt)(struct dhcpcd_ctx *,
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size_t *, unsigned int *, size_t *,
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const uint8_t *, size_t, struct dhcp_opt **),
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const uint8_t *od, size_t ol);
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void dhcp_zero_index(struct dhcp_opt *);
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size_t dhcp_read_lease_fd(int, uint8_t **);
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#endif
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