88 lines
3.5 KiB
C
88 lines
3.5 KiB
C
/* options.h - DHCP options handling
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*
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* Copyright (c) 2004-2011 Nicholas J. Kain <njkain at gmail dot com>
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* All rights reserved.
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*
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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 are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef OPTIONS_H_
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#define OPTIONS_H_
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#include "dhcp.h"
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#define DCODE_PADDING 0x00
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#define DCODE_SUBNET 0x01
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#define DCODE_TIMEZONE 0x02
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#define DCODE_ROUTER 0x03
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#define DCODE_DNS 0x06
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#define DCODE_LPRSVR 0x09
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#define DCODE_HOSTNAME 0x0c
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#define DCODE_DOMAIN 0x0f
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#define DCODE_IPTTL 0x17
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#define DCODE_MTU 0x1a
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#define DCODE_BROADCAST 0x1c
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#define DCODE_NTPSVR 0x2a
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#define DCODE_WINS 0x2c
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#define DCODE_REQIP 0x32
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#define DCODE_LEASET 0x33
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#define DCODE_OVERLOAD 0x34
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#define DCODE_MSGTYPE 0x35
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#define DCODE_SERVER_ID 0x36
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#define DCODE_PARAM_REQ 0x37
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#define DCODE_MAX_SIZE 0x39
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#define DCODE_VENDOR 0x3c
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#define DCODE_CLIENT_ID 0x3d
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#define DCODE_END 0xff
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#define MAX_DOPT_SIZE 500
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ssize_t get_dhcp_opt(struct dhcpmsg *packet, uint8_t code, uint8_t *dbuf,
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ssize_t dlen);
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ssize_t get_end_option_idx(struct dhcpmsg *packet);
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size_t add_option_string(struct dhcpmsg *packet, uint8_t code, const char *str,
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size_t slen);
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size_t add_u32_option(struct dhcpmsg *packet, uint8_t code, uint32_t data);
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size_t add_option_request_list(struct dhcpmsg *packet);
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size_t add_option_domain_name(struct dhcpmsg *packet, char *dom, size_t domlen);
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void add_option_subnet_mask(struct dhcpmsg *packet, uint32_t subnet);
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void add_option_broadcast(struct dhcpmsg *packet, uint32_t bc);
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void add_option_msgtype(struct dhcpmsg *packet, uint8_t type);
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void add_option_reqip(struct dhcpmsg *packet, uint32_t ip);
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void add_option_serverid(struct dhcpmsg *packet, uint32_t sid);
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#ifndef NDHS_BUILD
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void add_option_maxsize(struct dhcpmsg *packet);
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void add_option_vendor(struct dhcpmsg *packet);
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void add_option_clientid(struct dhcpmsg *packet);
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void add_option_hostname(struct dhcpmsg *packet);
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#else
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void add_option_clientid(struct dhcpmsg *packet, char *clientid, size_t clen);
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#endif
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uint32_t get_option_router(struct dhcpmsg *packet);
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uint8_t get_option_msgtype(struct dhcpmsg *packet);
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uint32_t get_option_serverid(struct dhcpmsg *packet, int *found);
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uint32_t get_option_leasetime(struct dhcpmsg *packet);
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#endif
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