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ndhc/ndhc/options.h

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Do more boundary and sanity checking when adding dhcp options. Simplify parameter list for ifchd_cmd().
2011-03-31 01:27:01 +05:30
/* options.h - DHCP options handling
*
Relicense under New BSD (2-clause) license. I don't see any advantage to restricting use unnecessarily, and simple attribution is fine.
2011-07-25 12:00:57 +05:30
* Copyright (c) 2004-2011 Nicholas J. Kain <njkain at gmail dot com>
* All rights reserved.
Do more boundary and sanity checking when adding dhcp options. Simplify parameter list for ifchd_cmd().
2011-03-31 01:27:01 +05:30
*
Relicense under New BSD (2-clause) license. I don't see any advantage to restricting use unnecessarily, and simple attribution is fine.
2011-07-25 12:00:57 +05:30
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
Do more boundary and sanity checking when adding dhcp options. Simplify parameter list for ifchd_cmd().
2011-03-31 01:27:01 +05:30
*
Relicense under New BSD (2-clause) license. I don't see any advantage to restricting use unnecessarily, and simple attribution is fine.
2011-07-25 12:00:57 +05:30
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
Do more boundary and sanity checking when adding dhcp options. Simplify parameter list for ifchd_cmd().
2011-03-31 01:27:01 +05:30
*
Relicense under New BSD (2-clause) license. I don't see any advantage to restricting use unnecessarily, and simple attribution is fine.
2011-07-25 12:00:57 +05:30
* - 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
Do more boundary and sanity checking when adding dhcp options. Simplify parameter list for ifchd_cmd().
2011-03-31 01:27:01 +05:30
*/
Fix header include guards to not use leading underscores.
2010-11-13 17:21:57 +05:30
#ifndef OPTIONS_H_
#define OPTIONS_H_
Initial commit.
2010-11-12 14:32:18 +05:30
Rename packet.[ch] to dhcp.[ch].
2011-07-02 13:21:44 +05:30
#include "dhcp.h"
Initial commit.
2010-11-12 14:32:18 +05:30
Some options are never sent to ifchd, but we unfortunately would need to sacrifice type checking to remove them from the options table. It may be worth doing that, but I want to audit each call point before.
2011-07-25 13:56:34 +05:30
#define DCODE_PADDING 0x00
Consolidate DHCP option code numbers.
2011-07-25 12:41:47 +05:30
#define DCODE_SUBNET 0x01
#define DCODE_TIMEZONE 0x02
#define DCODE_ROUTER 0x03
#define DCODE_DNS 0x06
#define DCODE_LPRSVR 0x09
#define DCODE_HOSTNAME 0x0c
#define DCODE_DOMAIN 0x0f
#define DCODE_IPTTL 0x17
#define DCODE_MTU 0x1a
#define DCODE_BROADCAST 0x1c
#define DCODE_NTPSVR 0x2a
#define DCODE_WINS 0x2c
Some options are never sent to ifchd, but we unfortunately would need to sacrifice type checking to remove them from the options table. It may be worth doing that, but I want to audit each call point before.
2011-07-25 13:56:34 +05:30
#define DCODE_REQIP 0x32
#define DCODE_LEASET 0x33
Consolidate DHCP option code numbers.
2011-07-25 12:41:47 +05:30
#define DCODE_OVERLOAD 0x34
Some options are never sent to ifchd, but we unfortunately would need to sacrifice type checking to remove them from the options table. It may be worth doing that, but I want to audit each call point before.
2011-07-25 13:56:34 +05:30
#define DCODE_MSGTYPE 0x35
Consolidate DHCP option code numbers.
2011-07-25 12:41:47 +05:30
#define DCODE_SERVER_ID 0x36
#define DCODE_PARAM_REQ 0x37
#define DCODE_MAX_SIZE 0x39
#define DCODE_VENDOR 0x3c
#define DCODE_CLIENT_ID 0x3d
#define DCODE_END 0xff
Move some defines out of dhcpd.h.
2011-03-30 15:07:22 +05:30
Rewrite DHCP options parsing to conform to RFC 3396: options concatenation is now fully supported.
2011-07-27 17:09:45 +05:30
#define MAX_DOPT_SIZE 500
ssize_t get_dhcp_opt(struct dhcpmsg *packet, uint8_t code, uint8_t *dbuf,
ssize_t dlen);
Make the various functions in options.c that take a pointer to an options buffer and length instead take a pointer to a struct dhcpmsg. This argument list choice implicitly gives safe length checks and is simpler. Remove DHCP_OPTIONS_LENGTH. Fold set_option() into alloc_option(). Make some more functions in options.[ch] static.
2011-06-27 22:23:35 +05:30
ssize_t get_end_option_idx(struct dhcpmsg *packet);
Encapsulate all string option additions into options.c. Note that these functions already existed, but were in dhcp.c -- this is just code motion between compilation units.
2011-07-26 09:18:35 +05:30
Delete a lot of code that is now unused thanks to the previous commit.
2011-07-26 15:54:30 +05:30
size_t add_option_request_list(struct dhcpmsg *packet);
Encapsulate all numeric option additions into options.c.
2011-07-26 09:04:32 +05:30
void add_option_msgtype(struct dhcpmsg *packet, uint8_t type);
void add_option_reqip(struct dhcpmsg *packet, uint32_t ip);
void add_option_maxsize(struct dhcpmsg *packet);
void add_option_serverid(struct dhcpmsg *packet, uint32_t sid);
Encapsulate all string option additions into options.c. Note that these functions already existed, but were in dhcp.c -- this is just code motion between compilation units.
2011-07-26 09:18:35 +05:30
void add_option_vendor(struct dhcpmsg *packet);
void add_option_clientid(struct dhcpmsg *packet);
void add_option_hostname(struct dhcpmsg *packet);
Move add_requests() from dhcpmsg.c to options.c. Fixes a layering violation. Document an ugly-as-hell code bit in ifchange.c. Add some debugging messages for the netlink response code. Clean headers a bit more.
2011-03-30 16:56:42 +05:30
Abstract uses of get_option_data() outside of ifchange.c and options.c. The eventual goal is to eliminate uses of get_option_data() in ifchange.c and will make it a static function in options.c.
2011-07-26 10:34:59 +05:30
uint32_t get_option_router(struct dhcpmsg *packet);
uint8_t get_option_msgtype(struct dhcpmsg *packet);
uint32_t get_option_serverid(struct dhcpmsg *packet, int *found);
uint32_t get_option_leasetime(struct dhcpmsg *packet);
Initial commit.
2010-11-12 14:32:18 +05:30
#endif
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