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61fb48930

Russ Dill

2002-10-14

FAILED Duration: 5s

Subject

added full udhcp integration

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No binary (build failed)

Architecture & Compiler Flags

Architecture: x86_64-linux-gnu Compiler: gcc (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0

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Commit Diff GitHub →

Makefile+1 -1

@@ -22,7 +22,7 @@ include $(TOPDIR).config
	include $(TOPDIR)Rules.mak
	SUBDIRS:=applets archival archival/libunarchive console-tools \
	editors fileutils findutils init miscutils modutils networking \
-	procps loginutils shell shellutils sysklogd \
+	networking/udhcp procps loginutils shell shellutils sysklogd \
	textutils util-linux libbb libpwdgrp

	all: do-it-all

examples/udhcpc/default.bound → examples/udhcp/sample.bound+1 -1

@@ -1,7 +1,7 @@
	#!/bin/sh
	# Sample udhcpc renew script

-	RESOLV_CONF="/etc/resolv.conf"
+	RESOLV_CONF="/etc/udhcpc/resolv.conf"

	[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
	[ -n "$subnet" ] && NETMASK="netmask $subnet"

?+0 -0

examples/udhcp/sample.nak+4 -0

@@ -0,0 +1,4 @@
+	#!/bin/sh
+	# Sample udhcpc nak script
+
+	echo Received a NAK: $message

examples/udhcpc/default.renew → examples/udhcp/sample.renew+2 -2

@@ -1,7 +1,7 @@
	#!/bin/sh
	# Sample udhcpc bound script

-	RESOLV_CONF="/etc/resolv.conf"
+	RESOLV_CONF="/etc/udhcpc/resolv.conf"

	[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
	[ -n "$subnet" ] && NETMASK="netmask $subnet"
@@ -27,4 +27,4 @@ for i in $dns
	do
	echo adding dns $i
	echo nameserver $i >> $RESOLV_CONF
-	done
+	done

examples/udhcpc/default.script → examples/udhcp/sample.script+1 -1

@@ -4,4 +4,4 @@
	# common initialization first, especially if more dhcp event notifications
	# are added.

-	exec /usr/share/udhcpc/default.$1
+	exec /usr/share/udhcpc/sample.$1

examples/udhcp/simple.script+39 -0

@@ -0,0 +1,39 @@
+	#!/bin/sh
+
+	# udhcpc script edited by Tim Riker <[email protected]>
+
+	[ -z "$1" ] && echo "Error: should be called from udhcpc" && exit 1
+
+	RESOLV_CONF="/etc/resolv.conf"
+	[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
+	[ -n "$subnet" ] && NETMASK="netmask $subnet"
+
+	case "$1" in
+	deconfig)
+	/sbin/ifconfig $interface 0.0.0.0
+	;;
+
+	renew\|bound)
+	/sbin/ifconfig $interface $ip $BROADCAST $NETMASK
+
+	if [ -n "$router" ] ; then
+	echo "deleting routers"
+	while route del default gw 0.0.0.0 dev $interface ; do
+	:
+	done
+
+	for i in $router ; do
+	route add default gw $i dev $interface
+	done
+	fi
+
+	echo -n > $RESOLV_CONF
+	[ -n "$domain" ] && echo search $domain >> $RESOLV_CONF
+	for i in $dns ; do
+	echo adding dns $i
+	echo nameserver $i >> $RESOLV_CONF
+	done
+	;;
+	esac
+
+	exit 0

examples/udhcp/udhcpd.conf+116 -0

@@ -0,0 +1,116 @@
+	# Sample udhcpd configuration file (/etc/udhcpd.conf)
+
+	# The start and end of the IP lease block
+
+	start 192.168.0.20 #default: 192.168.0.20
+	end 192.168.0.254 #default: 192.168.0.254
+
+
+	# The interface that udhcpd will use
+
+	interface eth0 #default: eth0
+
+
+	# The maximim number of leases (includes addressesd reserved
+	# by OFFER's, DECLINE's, and ARP conficts
+
+	#max_leases 254 #default: 254
+
+
+	# If remaining is true (default), udhcpd will store the time
+	# remaining for each lease in the udhcpd leases file. This is
+	# for embedded systems that cannot keep time between reboots.
+	# If you set remaining to no, the absolute time that the lease
+	# expires at will be stored in the dhcpd.leases file.
+
+	#remaining yes #default: yes
+
+
+	# The time period at which udhcpd will write out a dhcpd.leases
+	# file. If this is 0, udhcpd will never automatically write a
+	# lease file. (specified in seconds)
+
+	#auto_time 7200 #default: 7200 (2 hours)
+
+
+	# The amount of time that an IP will be reserved (leased) for if a
+	# DHCP decline message is received (seconds).
+
+	#decline_time 3600 #default: 3600 (1 hour)
+
+
+	# The amount of time that an IP will be reserved (leased) for if an
+	# ARP conflct occurs. (seconds
+
+	#conflict_time 3600 #default: 3600 (1 hour)
+
+
+	# How long an offered address is reserved (leased) in seconds
+
+	#offer_time 60 #default: 60 (1 minute)
+
+	# If a lease to be given is below this value, the full lease time is
+	# instead used (seconds).
+
+	#min_lease 60 #defult: 60
+
+
+	# The location of the leases file
+
+	#lease_file /var/lib/misc/udhcpd.leases #defualt: /var/lib/misc/udhcpd.leases
+
+	# The location of the pid file
+	#pidfile /var/run/udhcpd.pid #default: /var/run/udhcpd.pid
+
+	# Everytime udhcpd writes a leases file, the below script will be called.
+	# Useful for writing the lease file to flash every few hours.
+
+	#notify_file #default: (no script)
+
+	#notify_file dumpleases # <--- usefull for debugging
+
+	# The following are bootp specific options, setable by udhcpd.
+
+	#siaddr 192.168.0.22 #default: 0.0.0.0
+
+	#sname zorak #default: (none)
+
+	#boot_file /var/nfs_root #default: (none)
+
+	# The remainer of options are DHCP options and can be specifed with the
+	# keyword 'opt' or 'option'. If an option can take multiple items, such
+	# as the dns option, they can be listed on the same line, or multiple
+	# lines. The only option with a default is 'lease'.
+
+	#Examles
+	opt dns 192.168.10.2 192.168.10.10
+	option subnet 255.255.255.0
+	opt router 192.168.10.2
+	opt wins 192.168.10.10
+	option dns 129.219.13.81 # appened to above DNS servers for a total of 3
+	option domain local
+	option lease 864000 # 10 days of seconds
+
+
+	# Currently supported options, for more info, see options.c
+	#subnet
+	#timezone
+	#router
+	#timesvr
+	#namesvr
+	#dns
+	#logsvr
+	#cookiesvr
+	#lprsvr
+	#bootsize
+	#domain
+	#swapsvr
+	#rootpath
+	#ipttl
+	#mtu
+	#broadcast
+	#wins
+	#lease
+	#ntpsrv
+	#tftp
+	#bootfile

include/applets.h+7 -1

@@ -152,6 +152,9 @@
	#ifdef CONFIG_DUMPKMAP
	APPLET(dumpkmap, dumpkmap_main, _BB_DIR_BIN, _BB_SUID_NEVER)
	#endif
+	#ifdef CONFIG_DUMPLEASES
+	APPLET(dumpleases, dumpleases_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
+	#endif
	#ifdef CONFIG_DUTMP
	APPLET(dutmp, dutmp_main, _BB_DIR_USR_SBIN, _BB_SUID_NEVER)
	#endif
@@ -495,7 +498,10 @@
	APPLET(tty, tty_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
	#endif
	#ifdef CONFIG_UDHCPC
-	APPLET(udhcpc, udhcpc_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
+	APPLET(udhcpc, udhcpc_main, _BB_DIR_USR_SBIN, _BB_SUID_NEVER)
+	#endif
+	#ifdef CONFIG_UDHCPD
+	APPLET(udhcpd, udhcpd_main, _BB_DIR_USR_SBIN, _BB_SUID_NEVER)
	#endif
	#ifdef CONFIG_UMOUNT
	APPLET(umount, umount_main, _BB_DIR_BIN, _BB_SUID_NEVER)

include/usage.h+18 -2

@@ -385,6 +385,14 @@
	#define dumpkmap_example_usage \
	"$ dumpkmap > keymap\n"

+	#define dumpleases_trivial_usage \
+	"[-r\|-a] [-f LEASEFILE]"
+	#define dumpleases_full_usage \
+	"Usage: dumpleases -f <file> -[r\|a]\n" \
+	"\t-f,\t--file=FILENAME\tLeases file to load\n" \
+	"\t-r,\t--remaining\tInterepret lease times as time remaing\n" \
+	"\t-a,\t--absolute\tInterepret lease times as expire time\n"
+
	#define dutmp_trivial_usage \
	"[FILE]"
	#define dutmp_full_usage \
@@ -1945,12 +1953,14 @@
	"/dev/tty2\n"

	#define udhcpc_trivial_usage \
-	"[-fqv] [-c CLIENTID] [-H HOSTNAME] [-i INTERFACE]\n[-p file] [-r IP] [-s script]"
+	"[-fbnqv] [-c CLIENTID] [-H HOSTNAME] [-i INTERFACE]\n[-p pidfile] [-r IP] [-s script]"
	#define udhcpc_full_usage \
-	"\tUsage: udhcpcd [OPTIONS]\n" \
+	"\tUsage: udhcpc [OPTIONS]\n" \
	"\t-c,\t--clientid=CLIENTID\tClient identifier\n" \
	"\t-H,\t--hostname=HOSTNAME\tClient hostname\n" \
+	"\t-h,\t \tAlias for -h\n" \
	"\t-f,\t--foreground\tDo not fork after getting lease\n" \
+	"\t-b,\t--background\tFork to background if lease cannot be immediately negotiated.\n" \
	"\t-i,\t--interface=INTERFACE\tInterface to use (default: eth0)\n" \
	"\t-n,\t--now\tExit with failure if lease cannot be immediately negotiated.\n" \
	"\t-p,\t--pidfile=file\tStore process ID of daemon in file\n" \
@@ -1959,6 +1969,12 @@
	"\t-s,\t--script=file\tRun file at dhcp events (default: /usr/share/udhcpc/default.script)\n" \
	"\t-v,\t--version\tDisplay version"

+	#define udhcpd_trivial_usage \
+	"[configfile]\n" \
+
+	#define udhcpd_full_usage \
+	"\tUsage: udhcpd [configfile]\n"
+
	#ifdef CONFIG_FEATURE_MOUNT_FORCE
	#define USAGE_MOUNT_FORCE(a) a
	#else

networking/Makefile.in+0 -1

@@ -35,7 +35,6 @@ NETWORKING-$(CONFIG_TELNET) += telnet.o
	NETWORKING-$(CONFIG_TELNETD) += telnetd.o
	NETWORKING-$(CONFIG_TFTP) += tftp.o
	NETWORKING-$(CONFIG_TRACEROUTE) += traceroute.o
-	NETWORKING-$(CONFIG_UDHCPC) += udhcpc.o
	NETWORKING-$(CONFIG_WGET) += wget.o

	libraries-y+=$(NETWORKING_DIR)$(NETWORKING_AR)

networking/config.in+2 -1

@@ -47,12 +47,13 @@ if [ "$CONFIG_TRACEROUTE" = "y" ]; then
	bool ' Enable verbose output' CONFIG_FEATURE_TRACEROUTE_VERBOSE
	bool ' Enable SO_DEBUG option' CONFIG_FEATURE_TRACEROUTE_SO_DEBUG
	fi
-	bool 'udhcpc' CONFIG_UDHCPC
	bool 'wget' CONFIG_WGET
	if [ "$CONFIG_WGET" = "y" ]; then
	bool ' Enable a nifty process meter (+2k)' CONFIG_FEATURE_WGET_STATUSBAR
	bool ' Enable HTTP authentication' CONFIG_FEATURE_WGET_AUTHENTICATION
	fi

+	source networking/udhcp/config.in
+
	endmenu

networking/udhcp/AUTHORS+13 -0

@@ -0,0 +1,13 @@
+	udhcp server/client package
+	-----------------------
+
+	Russ Dill <[email protected]>
+	Matthew Ramsay <[email protected]>
+	Chris Trew <[email protected]>
+
+	Other Credits:
+	--------------
+	Moreton Bay (http://www.moretonbay.com/)
+	Lineo (http://opensource.lineo.com)
+
+

networking/udhcp/COPYING+339 -0

@@ -0,0 +1,339 @@
+	GNU GENERAL PUBLIC LICENSE
+	Version 2, June 1991
+
+	Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+	675 Mass Ave, Cambridge, MA 02139, USA
+	Everyone is permitted to copy and distribute verbatim copies
+	of this license document, but changing it is not allowed.
+
+	Preamble
+
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+	freedom to share and change it. By contrast, the GNU General Public
+	License is intended to guarantee your freedom to share and change free
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+	General Public License applies to most of the Free Software
+	Foundation's software and to any other program whose authors commit to
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+
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+	REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+	INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+	OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+	TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+	YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+	PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+	POSSIBILITY OF SUCH DAMAGES.
+
+	END OF TERMS AND CONDITIONS
+

+	Appendix: How to Apply These Terms to Your New Programs
+
+	If you develop a new program, and you want it to be of the greatest
+	possible use to the public, the best way to achieve this is to make it
+	free software which everyone can redistribute and change under these terms.
+
+	To do so, attach the following notices to the program. It is safest
+	to attach them to the start of each source file to most effectively
+	convey the exclusion of warranty; and each file should have at least
+	the "copyright" line and a pointer to where the full notice is found.
+
+	<one line to give the program's name and a brief idea of what it does.>
+	Copyright (C) 19yy <name of author>
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program; if not, write to the Free Software
+	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+	Also add information on how to contact you by electronic and paper mail.
+
+	If the program is interactive, make it output a short notice like this
+	when it starts in an interactive mode:
+
+	Gnomovision version 69, Copyright (C) 19yy name of author
+	Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+	This is free software, and you are welcome to redistribute it
+	under certain conditions; type `show c' for details.
+
+	The hypothetical commands `show w' and `show c' should show the appropriate
+	parts of the General Public License. Of course, the commands you use may
+	be called something other than `show w' and `show c'; they could even be
+	mouse-clicks or menu items--whatever suits your program.
+
+	You should also get your employer (if you work as a programmer) or your
+	school, if any, to sign a "copyright disclaimer" for the program, if
+	necessary. Here is a sample; alter the names:
+
+	Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+	`Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+	<signature of Ty Coon>, 1 April 1989
+	Ty Coon, President of Vice
+
+	This General Public License does not permit incorporating your program into
+	proprietary programs. If your program is a subroutine library, you may
+	consider it more useful to permit linking proprietary applications with the
+	library. If this is what you want to do, use the GNU Library General
+	Public License instead of this License.

networking/udhcp/ChangeLog+246 -0

@@ -0,0 +1,246 @@
+	0.9.8 (pending)
+	+ udhcp now fits nicely into busybox
+	(Glenn McGrath <[email protected]> as well as myself)
+	+ updated client manpage (me)
+	+ both client and server now use sockets for signal handling,
+	hopefully, this will be the last needed change in signal
+	handling, I'm fairly certain all the possible races are now
+	closed. (me)
+	+ The server now restarts the auto_time timer when it receives
+	a SIGUSR1 (write out config file). (me)
+	+ Improve signal handling (David Poole)
+	+ Fix to config file parsing (Matt Kraai)
+	+ Fix load lease logic (me)
+	+ Fix clear_lease logic (me)
+	+ -h is now an alias for -H (udhcp bug #1253)
+	+ Shorter timeout on not receiving offers (me)
+	+ Improved signal behavior by client (me)
+	+ Would never assign end address (Keith Smith <[email protected]>)
+	+ Was improperly reporting yiaddr as siaddr ([email protected])
+	udhcp bug#1256
+	+ Fixed reading of client id (David Poole <[email protected]>)
+	+ change sys_errlist[] to strerror() as it aparently doesn't exist
+	(andersee <[email protected]>)
+	+ fixed get_raw_packet so it returns -2 on non fatal errors
+	(Ted Lemon <[email protected]>)
+	+ Improved (hopefully) NAKing behavior (me)
+	+ Added -b option (Jouni Malinen)
+	+ Compute checksums correctly on big endian hosts
+	(Jouni Malinen <[email protected]>)
+
+	0.9.7 (020526)
+	+ Use add_lease in read_leases, sanitizes leases more, and clears out exprired
+	ones if there is no more room (me)
+	+ Moved udhcpd.leases to /var/lib/misc/udhcpd.leases (Debian bug #147747)
+	+ Change (obsolete) AF_INET in arping.c to PF_PACKET (Debian bug #127049)
+	+ Added script hook for DHCPNAK (nak), as well as providing the message option
+	(me)
+	+ Generate the paramaters request list by seeing what options in options.c are
+	ored with OPTION_REQ in options.c
+	+ Fix dhcp renew forgetfullness on client (bug #1230)
+	+ Fix dhcp release bug on client (bug #1231)
+	+ Set option request list for DHCP renew (bug #1233)
+	+ Set BOOTREQUEST/REPLY properly
+	+ Change client-identifier field to popularly expected behavior (me)
+	+ Only reopen port on errors (me)
+	+ Change fork/close/setsid structures to daemon() (me)
+	+ Allow user to specify udhcpd config file at run time (Steven, me)
+	+ Write pidfile after changing it (Steven CTR Carr <[email protected]>)
+	+ Added env var docs to udhcpc man page (Matt)
+	+ Standardized lowercase udhcp in documentation (me)
+	+ Accept packets without a UDP checksum (me)
+	+ Accept packets with extra garbage (me)
+	+ Better error handling in files.c (me)
+	+ Combined read_interface function to reduce COMBINED_BINARY size (me)
+	+ Drop calc_length(), some servers choke on smaller packets (me)
+	+ Try to clean some fat out (me)
+
+	0.9.6 (011001)
+	+ Added bootp paramaters to server (me)
+	+ Added bootp paramaters to client (me)
+	+ Added vendor id to client (me)
+	+ Better pidfile handling in client and server (me)
+	+ Added man pages (Matt Kraai <[email protected]>)
+
+	0.9.5 (010914)
+	+ Fixed $HOME and $PATH env passing (me)
+	+ Fixed client to only listen for raw packets on correct interface (me)
+	+ added --quit,-q option to quit after a lease is obtained (me)
+	+ Fixed 100% CPU utilization by client when interface is down (me)
+
+	0.9.4 (010827)
+	+ Force broadcast to broken clients that request unicast (ie, MSFT 98)
+	+ Make install rules (Adam J. Richter <[email protected]>)
+	+ One scripts, instead of many (Adam)
+	+ Removed script paramater info files (env vars only) (Adam)
+	+ Controlling of forking behavior in client (Adam)
+	+ General script.c/dhcpc.c cleanups (Adam)
+
+	0.9.3 (010820)
+	+ Increased debugging verbosity (me)
+	+ Cut trailing whitespace when reading config file (me)
+	+ added hostname option to client (me)
+	+ fixed a strncpy bug in script.c (me)
+	+ fixed a leaky socket in dhcpc.c (me)
+	+ fixed a leaky socket in dhcpd.c (me)
+
+	0.9.2 (010810)
+	+ Added raw sockets to client (me)
+	+ alignment fixes (Mark Huang)
+	+ compiler warning fixes (Mark Huang)
+	+ client now sends parameter list (Mark Huang/me)
+	+ added ipttl option
+	+ Does now not request broadcast packets
+
+	0.9.1 (010806)
+	+ Added udhcpc client
+	+ reorganized functions/files
+	+ listening socket now only binds to one interface
+
+	0.9.0 (010720) Major rewrite, current changes, goals:
+	+ should not segfault on bogus packets.
+	+ Options can be read from sname and file fields.
+	+ supports all DHCP messages (release, decline, inform).
+	+ IP block is now specified by a range of IP's.
+	+ Leases file now contains lease time (relative, or absolute).
+	+ Just about any DHCP option is now supported.
+	+ DNS entries are no longer read from resolv.conf
+	+ Lease file can be written periodically when the process receives a SIGUSR1
+	+ arpping should be supported on all arches.
+	+ support for DHCP relays.
+	+ DHCP messages can be unicast if the client requests it.
+	+ many, many, many other things.
+
+	0.8.29 (000323)
+	+ stable(?) release
+
+
+	0.8.28 (000323)
+	+ removed alarm as it was causing server to go down
+	+ removed debugging
+	+ break down dhcpd.c into manageable files
+
+
+	0.8.27 (000221)
+	+ OFFER also sends gateway/subnet (for picky dhcp clients)
+	+ multiple DNS now handled from resolv.conf if available
+	+ multiple WINS (from dhcpd.conf)
+
+	0.8.25 (000120)
+	+ now compiles and runs on a generic linux system
+	tested with a windows 98 client and the sample config
+	files in the samples directory.
+
+	0.8.24 (000117)
+	+ makeiplist tool has basic functionality in place
+	+ new sample config files
+	+ route add -host 255.255.255.255 dev eth0 added for generic linux
+
+	0.8.23 (000117)
+	+ NETtel specific fix for ignoring dhcp requests on 2nd interface
+
+	0.8.22 (000113)
+	+ minor changes to compile under a generic linux system
+	+ minor config file location changes for a generic linux system
+	+ makeiplist fixes.. still incomplete.. but etting closer
+
+	0.8.21 (000113)
+	+ now sends the correct server ip instead of hardcoded value
+	+ minor debugging fixes for critical messages
+
+	0.8.20 (000106)
+	+ cut out dhcp server checking.. this was causing dialout ppp
+	sessions with idle time set to never time out.
+	+ also removed the 10 second pause before launching.. as this
+	was originally to stop it replying to a dhcp client
+	on a NETtel which was really a bad way to do it in the
+	first place :-)
+
+	0.8.19 (000104)
+	+ fixes for route add -host on a machine that needs to run both
+	a DHCP client and server (dual eth box)
+
+	0.8.18 (991220)
+
+	+ Race conditions fixed by disabling alarm whilst the server is busy
+	+ Fixed continous clearing of the offered array so that it is only cleared
+	when it is dirty - (could change the position of when dirty is set)
+
+	0.8.17 (991212)
+
+	- has problems clearing out the offered array
+
+	0.8.16 (991203)
+	+ Non blocking error is changes to informational as it is not really
+	an error
+
+	0.8.15 (991129)
+	+ Servs the dns field 3 times (Nettel only) so that windows servers
+	dont time out whilst nettel is booting
+
+	0.8.14 (991126)
+	+ added owner check for the offered array so clean out time may be
+	increased
+	+ added new func to print out chadder/MAC
+
+	0.8.13 (991125)
+	+ added win95 support (w95 changed xid halfway through conversation)
+	+ had to change the offered array to use hardware addresses instead of xid
+	+ fixed re offered bug
+	+ added more debugging
+
+	0.8.12 (991111)
+	+ debugging was real bad.. cleaned up a bit.. needs overhaul
+
+
+	0.8.11 (991110)
+	+ fixed up offeredAddr array to actually be used now!! offeredAddr is
+	used to see if another simultaneous connecting client was offered
+	an address that we are about to offer another client (multiple
+	client bug)
+	+ removed re_offered variable as it breaks multiple client support
+	+ added lease time to ACK -- doesn't work if in OFFER
+	+ decreased internal array clear delay to 60 seconds
+	+ minor findAddr bug (returning -1 instead of 0)
+	+ if clients xid already in offeredAddr offer the same addr and don't add a
+	new addr to offered (caused by a client issuing multiple DISCOVERs)
+
+	0.8.10 (991105)
+	+ \n bug in arpping
+	+ minor debugging changes (removed printfs etc)
+	+ started browseiplist (not finished)
+
+	0.8.9 (19991105)
+	+ fixed options array size bug (options were cut off)
+
+	0.8.8 (19991105)
+	+ ignores requests from dhcpcd on the same machine
+
+	0.8.7 (19991104)
+	+ don't die if we can't bind to search for existing DHCP server
+	+ slightly more verbose syslogging
+
+	0.8.6 (19991103)
+	+ added makeiplist (not finished -- core dumps)
+	+ minor debug changes
+
+	0.8.5 (19991029)
+	+ exits if another DHCP server is already on the network
+	+ added Linux Makefile
+
+	0.8.4 (19991026)
+	+ minor bug fix in findaddr preventing an addr being found
+
+	0.8.3 (19991025)
+	+ fixed up debugging
+	+ minor hwaddr issues
+
+	0.8.2 (19991022)
+	+ free leases (new arpping code from dhcpcd)
+	+ fixed bug where crashes if no leases/iplist file
+	+ syslogging and debugging switch
+	+ serve DNS from resolv.conf
+	+ fixed bug where new lease added if same mac offered
+	+ now checks the ip is free b4 offering
+	+ now supports wins server
+

networking/udhcp/Makefile.in+46 -0

@@ -0,0 +1,46 @@
+	# Makefile for busybox
+	#
+	# Copyright (C) 1999-2002 Erik Andersen <[email protected]>
+	#
+	# This program is free software; you can redistribute it and/or modify
+	# it under the terms of the GNU General Public License as published by
+	# the Free Software Foundation; either version 2 of the License, or
+	# (at your option) any later version.
+	#
+	# This program is distributed in the hope that it will be useful,
+	# but WITHOUT ANY WARRANTY; without even the implied warranty of
+	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+	# General Public License for more details.
+	#
+	# You should have received a copy of the GNU General Public License
+	# along with this program; if not, write to the Free Software
+	# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+	#
+
+	UDHCP_AR:=udhcp.a
+	ifndef $(UDHCP_DIR)
+	UDHCP_DIR:=$(TOPDIR)networking/udhcp/
+	endif
+
+	#ok, so I forgot how to do an or, but this is a quick and dirty hack
+	ifeq ($(CONFIG_UDHCPC), y)
+	CONFIG_UDHCP_SHARED=y
+	else
+	ifeq ($(CONFIG_UDHCPD), y)
+	CONFIG_UDHCP_SHARED=y
+	else
+	CONFIG_UDHCP_SHARED=n
+	endif
+	endif
+
+	UDHCP-y:=
+	UDHCP-$(CONFIG_UDHCP_SHARED) += options.o socket.o packet.o pidfile.o
+	UDHCP-$(CONFIG_UDHCPC) += dhcpc.o clientpacket.o script.o
+	UDHCP-$(CONFIG_UDHCPD) += dhcpd.o arpping.o files.o leases.o serverpacket.o
+	UDHCP-$(CONFIG_DUMPLEASES) += dumpleases.o
+
+	libraries-y+=$(UDHCP_DIR)$(UDHCP_AR)
+
+	$(UDHCP_DIR)$(UDHCP_AR): $(patsubst %,$(UDHCP_DIR)%, $(UDHCP-y))
+	$(AR) -ro $@ $(patsubst %,$(UDHCP_DIR)%, $(UDHCP-y))
+

networking/udhcp/README+197 -0

@@ -0,0 +1,197 @@
+	udhcp server/client package readme
+	-------------------------
+
+	The udhcp server/client package is primarily geared towards embedded
+	systems. It does however, strive to be fully functional, and RFC
+	compliant.
+
+	udhcp server (udhcpd)
+	--------------------
+
+	The only command line argument to udhcpd is an optional specifed
+	config file. If no config file is specified, udhcpd uses the default
+	config file, /etc/udhcpd.conf. Ex:
+
+	udhcpd /etc/udhcpd.eth1.conf
+
+	The udhcp server employs a number of simple config files:
+
+	udhcpd.leases
+	------------
+
+	The udhcpd.leases behavior is designed for an embedded system. The
+	file is written either every auto_time seconds, or when a SIGUSR1
+	is received (the auto_time timer restarts if a SIGUSR1 is received).
+	If you send a SIGTERM to udhcpd directly after a SIGUSR1, udhcpd will
+	finish writing the leases file and wait for the aftermentioned script
+	to be executed and finish before quiting, so you do not need to sleep
+	between sending signals. When the file is written, a script can be
+	optionally called to commit the file to flash. Lease times are stored
+	in the file by time remaining in lease (for systems without clock
+	that works when there is no power), or by the absolute time that it
+	expires in seconds from epoch. In the remainig format, expired leases
+	are stored as zero. The file is of the format:
+
+	16 byte MAC
+	4 byte ip address
+	u32 expire time
+	16 byte MAC
+	4 byte ip address
+	u32 expire time
+	.
+	etc.
+
+	example: hexdump udhcpd.leases
+
+	0000000 1000 c95a 27d9 0000 0000 0000 0000 0000
+	0000010 a8c0 150a 0d00 2d29 5000 23fc 8566 0000
+	0000020 0000 0000 0000 0000 a8c0 140a 0d00 4e29
+	0000030
+
+
+	udhcpd.conf
+	----------
+
+	The format is fairly simple, there is a sample file with all the
+	available options and comments describing them in samples/udhcpd.conf
+
+
+	udhcp client (udhcpc)
+	--------------------
+
+	The udhcp client negotiates a lease with the DHCP server and notifies
+	a set of scripts when a leases is obtained or lost. The command line
+	options for the udhcp client are:
+
+	-c, --clientid=CLIENTID Client identifier
+	-H, --hostname=HOSTNAME Client hostname
+	-h, Alias for -H
+	-f, --foreground Do not fork after getting lease
+	-b, --background Fork to background if lease cannot be
+	immediately negotiated.
+	-i, --interface=INTERFACE Interface to use (default: eth0)
+	-n, --now Exit with failure if lease cannot be
+	immediately negotiated.
+	-p, --pidfile=file Store process ID of daemon in file
+	-q, --quit Quit after obtaining lease
+	-r, --request=IP IP address to request (default: none)
+	-s, --script=file Run file at dhcp events (default:
+	/usr/share/udhcpc/default.script)
+	-v, --version Display version
+
+	If the requested IP address cannot be obtained, the client accepts the
+	address that the server offers.
+
+	When an event occurs, udhcpc calls the action script. The script by
+	default is /usr/share/udhcpc/default.script but this can be changed via
+	the command line arguments. The three possible arguments to the script
+	are:
+
+	deconfig: This argument is used when udhcpc starts, and
+	when a leases is lost. The script should put the interface in an
+	up, but deconfigured state, ie: ifconfig $interface 0.0.0.0.
+
+	bound: This argument is used when udhcpc moves from an
+	unbound, to a bound state. All of the paramaters are set in
+	enviromental variables, The script should configure the interface,
+	and set any other relavent parameters (default gateway, dns server,
+	etc).
+
+	renew: This argument is used when a DHCP lease is renewed. All of
+	the paramaters are set in enviromental variables. This argument is
+	used when the interface is already configured, so the IP address,
+	will not change, however, the other DHCP paramaters, such as the
+	default gateway, subnet mask, and dns server may change.
+
+	nak: This argument is used with udhcpc receives a NAK message.
+	The script with the deconfig argument will be called directly
+	afterwards, so no changes to the network interface are neccessary.
+	This hook is provided for purely informational purposes (the
+	message option may contain a reason for the NAK).
+
+	The paramaters for enviromental variables are as follows:
+
+	$HOME - The set $HOME env or "/"
+	$PATH - the set $PATH env or "/bin:/usr/bin:/sbin:/usr/sbin"
+	$1 - What action the script should perform
+	interface - The interface this was obtained on
+	ip - The obtained IP
+	siaddr - The bootp next server option
+	sname - The bootp server name option
+	boot_file - The bootp boot file option
+	subnet - The assigend subnet mask
+	timezone - Offset in seconds from UTC
+	router - A list of routers
+	timesvr - A list of time servers
+	namesvr - A list of IEN 116 name servers
+	dns - A list of DNS server
+	logsvr - A list of MIT-LCS UDP log servers
+	cookiesvr - A list of RFC 865 cookie servers
+	lprsvr - A list of LPR servers
+	hostname - The assigned hostname
+	bootsize - The length in 512 octect blocks of the bootfile
+	domain - The domain name of the network
+	swapsvr - The IP address of the client's swap server
+	rootpath - The path name of the client's root disk
+	ipttl - The TTL to use for this network
+	mtu - The MTU to use for this network
+	broadcast - The broadcast address for this network
+	ntpsrv - A list of NTP servers
+	wins - A list of WINS servers
+	lease - The lease time, in seconds
+	dhcptype - DHCP message type (safely ignored)
+	serverid - The IP of the server
+	message - Reason for a DHCPNAK
+	tftp - The TFTP server name
+	bootfile - The bootfile name
+
+	additional options are easily added in options.c.
+
+	udhcpc also responds to SIGUSR1 and SIGUSR2. SIGUSR1 will force a renew state,
+	and SIGUSR2 will force a release of the current lease, and cause udhcpc to
+	go into an inactive state (until it is killed, or receives a SIGUSR1). You do
+	not need to sleep between sending signals, as signals received are processed
+	sequencially in the order they are received.
+
+
+
+	compile time options
+	-------------------
+
+	The Makefile contains three of the compile time options:
+
+	DEBUG: If DEBUG is defined, udhcpd will output extra debugging
+	output, compile with -g, and not fork to the background when run.
+	SYSLOG: If SYSLOG is defined, udhcpd will log all its messages
+	syslog, otherwise, it will attempt to log them to stdout.
+
+	COMBINED_BINARY: If COMBINED_BINARY is define, one binary, udhcpd,
+	is created. If called as udhcpd, the dhcp server will be started.
+	If called as udhcpc, the dhcp client will be started.
+
+	dhcpd.h contains the other two compile time options:
+
+	LEASE_TIME: The default lease time if not specified in the config
+	file.
+
+	DHCPD_CONFIG_FILE: The defualt config file to use.
+
+	options.c contains a set of dhcp options for the client:
+
+	name[10]: The name of the option as it will appear in scripts
+
+	flags: The type of option, as well as if it will be requested
+	by the client (OPTION_REQ)
+
+	code: The DHCP code for this option
+
+	busybox drop-in
+	--------------
+	udhcp is now a drop-in component for busybox (http://busybox.net).
+	To update busybox to the latest revision, simply do a:
+
+	cp *.[ch] README AUTHORS COPYING ChangeLog TODO \
+	<busybox_source>/networking/udhcp
+
+	The only two files udhcp does not provide are config.in and
+	Makefile.in, so these may need to be updated from time to time.

networking/udhcp/TODO+17 -0

@@ -0,0 +1,17 @@
+	TODO
+	----
+	+ make failure of reading functions revert to previous value, not the default
+	+ sanity code for option[OPT_LEN]
+	+ fix aliasing (ie: eth0:0)
+	+ DONE: Make sure get_raw_packet only accepts packets on the specified interface
+	+ better standard linux distro support
+	+ DONE: make config file a command line option for server
+	+ IMPLEMENTED: make forking a command line option
+	+ make sure packet generation works on a wide varitey of arches
+	+ Interoperability testing
+	+ Hooks within the DHCP server
+	+ Additional bootp support in client/server
+	+ Make serverid option in server configurable
+	+ DONE: cause client to generate DHCP_VENDOR option
+	+ Possibly add failure message to DHCP NAK
+	+ Possibly log DHCP NAK failure message in client

networking/udhcp/arpping.c+105 -0

@@ -0,0 +1,105 @@
+	/*
+	* arpping.c
+	*
+	* Mostly stolen from: dhcpcd - DHCP client daemon
+	* by Yoichi Hariguchi <[email protected]>
+	*/
+
+	#include <sys/types.h>
+	#include <sys/time.h>
+	#include <time.h>
+	#include <sys/types.h>
+	#include <sys/socket.h>
+	#include <netinet/if_ether.h>
+	#include <net/if_arp.h>
+	#include <netinet/in.h>
+	#include <stdio.h>
+	#include <string.h>
+	#include <unistd.h>
+	#include <errno.h>
+
+	#include "dhcpd.h"
+	#include "debug.h"
+	#include "arpping.h"
+
+	/* args: yiaddr - what IP to ping
+	* ip - our ip
+	* mac - our arp address
+	* interface - interface to use
+	* retn: 1 addr free
+	* 0 addr used
+	* -1 error
+	*/
+
+	/* FIXME: match response against chaddr */
+	int arpping(u_int32_t yiaddr, u_int32_t ip, unsigned char mac, char interface)
+	{
+
+	int timeout = 2;
+	int optval = 1;
+	int s; /* socket */
+	int rv = 1; /* return value */
+	struct sockaddr addr; /* for interface name */
+	struct arpMsg arp;
+	fd_set fdset;
+	struct timeval tm;
+	time_t prevTime;
+
+
+	if ((s = socket (PF_PACKET, SOCK_PACKET, htons(ETH_P_ARP))) == -1) {
+	LOG(LOG_ERR, "Could not open raw socket");
+	return -1;
+	}
+
+	if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &optval, sizeof(optval)) == -1) {
+	LOG(LOG_ERR, "Could not setsocketopt on raw socket");
+	close(s);
+	return -1;
+	}
+
+	/* send arp request */
+	memset(&arp, 0, sizeof(arp));
+	memcpy(arp.ethhdr.h_dest, MAC_BCAST_ADDR, 6); /* MAC DA */
+	memcpy(arp.ethhdr.h_source, mac, 6); /* MAC SA */
+	arp.ethhdr.h_proto = htons(ETH_P_ARP); /* protocol type (Ethernet) */
+	arp.htype = htons(ARPHRD_ETHER); /* hardware type */
+	arp.ptype = htons(ETH_P_IP); /* protocol type (ARP message) */
+	arp.hlen = 6; /* hardware address length */
+	arp.plen = 4; /* protocol address length */
+	arp.operation = htons(ARPOP_REQUEST); /* ARP op code */
+	((u_int ) arp.sInaddr) = ip; /* source IP address */
+	memcpy(arp.sHaddr, mac, 6); /* source hardware address */
+	((u_int ) arp.tInaddr) = yiaddr; /* target IP address */
+
+	memset(&addr, 0, sizeof(addr));
+	strcpy(addr.sa_data, interface);
+	if (sendto(s, &arp, sizeof(arp), 0, &addr, sizeof(addr)) < 0)
+	rv = 0;
+
+	/* wait arp reply, and check it */
+	tm.tv_usec = 0;
+	time(&prevTime);
+	while (timeout > 0) {
+	FD_ZERO(&fdset);
+	FD_SET(s, &fdset);
+	tm.tv_sec = timeout;
+	if (select(s + 1, &fdset, (fd_set ) NULL, (fd_set ) NULL, &tm) < 0) {
+	DEBUG(LOG_ERR, "Error on ARPING request: %s", strerror(errno));
+	if (errno != EINTR) rv = 0;
+	} else if (FD_ISSET(s, &fdset)) {
+	if (recv(s, &arp, sizeof(arp), 0) < 0 ) rv = 0;
+	if (arp.operation == htons(ARPOP_REPLY) &&
+	bcmp(arp.tHaddr, mac, 6) == 0 &&
+	((u_int ) arp.sInaddr) == yiaddr) {
+	DEBUG(LOG_INFO, "Valid arp reply receved for this address");
+	rv = 0;
+	break;
+	}
+	}
+	timeout -= time(NULL) - prevTime;
+	time(&prevTime);
+	}
+	close(s);
+	DEBUG(LOG_INFO, "%salid arp replies for this address", rv ? "No v" : "V");
+	return rv;
+	}

networking/udhcp/arpping.h+30 -0

@@ -0,0 +1,30 @@
+	/*
+	* arpping .h
+	*/
+
+	#ifndef ARPPING_H
+	#define ARPPING_H
+
+	#include <netinet/if_ether.h>
+	#include <net/if_arp.h>
+	#include <net/if.h>
+	#include <netinet/in.h>
+
+	struct arpMsg {
+	struct ethhdr ethhdr; /* Ethernet header */
+	u_short htype; /* hardware type (must be ARPHRD_ETHER) */
+	u_short ptype; /* protocol type (must be ETH_P_IP) */
+	u_char hlen; /* hardware address length (must be 6) */
+	u_char plen; /* protocol address length (must be 4) */
+	u_short operation; /* ARP opcode */
+	u_char sHaddr[6]; /* sender's hardware address */
+	u_char sInaddr[4]; /* sender's IP address */
+	u_char tHaddr[6]; /* target's hardware address */
+	u_char tInaddr[4]; /* target's IP address */
+	u_char pad[18]; /* pad for min. Ethernet payload (60 bytes) */
+	};
+
+	/* function prototypes */
+	int arpping(u_int32_t yiaddr, u_int32_t ip, unsigned char arp, char interface);
+
+	#endif

networking/udhcp/clientpacket.c+239 -0

@@ -0,0 +1,239 @@
+	/* clientpacket.c
+	*
+	* Packet generation and dispatching functions for the DHCP client.
+	*
+	* Russ Dill <[email protected]> July 2001
+	*
+	* This program is free software; you can redistribute it and/or modify
+	* it under the terms of the GNU General Public License as published by
+	* the Free Software Foundation; either version 2 of the License, or
+	* (at your option) any later version.
+	*
+	* This program is distributed in the hope that it will be useful,
+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	* GNU General Public License for more details.
+	*
+	* You should have received a copy of the GNU General Public License
+	* along with this program; if not, write to the Free Software
+	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+	*/
+
+	#include <string.h>
+	#include <sys/socket.h>
+	#include <features.h>
+	#if __GLIBC__ >=2 && __GLIBC_MINOR >= 1
+	#include <netpacket/packet.h>
+	#include <net/ethernet.h>
+	#else
+	#include <asm/types.h>
+	#include <linux/if_packet.h>
+	#include <linux/if_ether.h>
+	#endif
+	#include <stdlib.h>
+	#include <time.h>
+	#include <unistd.h>
+	#include <netinet/in.h>
+	#include <arpa/inet.h>
+
+
+	#include "dhcpd.h"
+	#include "packet.h"
+	#include "options.h"
+	#include "dhcpc.h"
+	#include "debug.h"
+
+
+	/* Create a random xid */
+	unsigned long random_xid(void)
+	{
+	static int initialized;
+	if (!initialized) {
+	srand(time(0));
+	initialized++;
+	}
+	return rand();
+	}
+
+
+	/* initialize a packet with the proper defaults */
+	static void init_packet(struct dhcpMessage *packet, char type)
+	{
+	struct vendor {
+	char vendor, length;
+	char str[sizeof("udhcp "VERSION)];
+	} vendor_id = { DHCP_VENDOR, sizeof("udhcp "VERSION) - 1, "udhcp "VERSION};
+
+	init_header(packet, type);
+	memcpy(packet->chaddr, client_config.arp, 6);
+	add_option_string(packet->options, client_config.clientid);
+	if (client_config.hostname) add_option_string(packet->options, client_config.hostname);
+	add_option_string(packet->options, (unsigned char *) &vendor_id);
+	}
+
+
+	/* Add a paramater request list for stubborn DHCP servers. Pull the data
+	* from the struct in options.c. Don't do bounds checking here because it
+	* goes towards the head of the packet. */
+	static void add_requests(struct dhcpMessage *packet)
+	{
+	int end = end_option(packet->options);
+	int i, len = 0;
+
+	packet->options[end + OPT_CODE] = DHCP_PARAM_REQ;
+	for (i = 0; options[i].code; i++)
+	if (options[i].flags & OPTION_REQ)
+	packet->options[end + OPT_DATA + len++] = options[i].code;
+	packet->options[end + OPT_LEN] = len;
+	packet->options[end + OPT_DATA + len] = DHCP_END;
+
+	}
+
+
+	/* Broadcast a DHCP discover packet to the network, with an optionally requested IP */
+	int send_discover(unsigned long xid, unsigned long requested)
+	{
+	struct dhcpMessage packet;
+
+	init_packet(&packet, DHCPDISCOVER);
+	packet.xid = xid;
+	if (requested)
+	add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
+
+	add_requests(&packet);
+	LOG(LOG_DEBUG, "Sending discover...");
+	return raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
+	SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
+	}
+
+
+	/* Broadcasts a DHCP request message */
+	int send_selecting(unsigned long xid, unsigned long server, unsigned long requested)
+	{
+	struct dhcpMessage packet;
+	struct in_addr addr;
+
+	init_packet(&packet, DHCPREQUEST);
+	packet.xid = xid;
+
+	add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
+	add_simple_option(packet.options, DHCP_SERVER_ID, server);
+
+	add_requests(&packet);
+	addr.s_addr = requested;
+	LOG(LOG_DEBUG, "Sending select for %s...", inet_ntoa(addr));
+	return raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
+	SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
+	}
+
+
+	/* Unicasts or broadcasts a DHCP renew message */
+	int send_renew(unsigned long xid, unsigned long server, unsigned long ciaddr)
+	{
+	struct dhcpMessage packet;
+	int ret = 0;
+
+	init_packet(&packet, DHCPREQUEST);
+	packet.xid = xid;
+	packet.ciaddr = ciaddr;
+
+	add_requests(&packet);
+	LOG(LOG_DEBUG, "Sending renew...");
+	if (server)
+	ret = kernel_packet(&packet, ciaddr, CLIENT_PORT, server, SERVER_PORT);
+	else ret = raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
+	SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
+	return ret;
+	}
+
+
+	/* Unicasts a DHCP release message */
+	int send_release(unsigned long server, unsigned long ciaddr)
+	{
+	struct dhcpMessage packet;
+
+	init_packet(&packet, DHCPRELEASE);
+	packet.xid = random_xid();
+	packet.ciaddr = ciaddr;
+
+	add_simple_option(packet.options, DHCP_REQUESTED_IP, ciaddr);
+	add_simple_option(packet.options, DHCP_SERVER_ID, server);
+
+	LOG(LOG_DEBUG, "Sending release...");
+	return kernel_packet(&packet, ciaddr, CLIENT_PORT, server, SERVER_PORT);
+	}
+
+
+	/* return -1 on errors that are fatal for the socket, -2 for those that aren't */
+	int get_raw_packet(struct dhcpMessage *payload, int fd)
+	{
+	int bytes;
+	struct udp_dhcp_packet packet;
+	u_int32_t source, dest;
+	u_int16_t check;
+
+	memset(&packet, 0, sizeof(struct udp_dhcp_packet));
+	bytes = read(fd, &packet, sizeof(struct udp_dhcp_packet));
+	if (bytes < 0) {
+	DEBUG(LOG_INFO, "couldn't read on raw listening socket -- ignoring");
+	usleep(500000); /* possible down interface, looping condition */
+	return -1;
+	}
+
+	if (bytes < (int) (sizeof(struct iphdr) + sizeof(struct udphdr))) {
+	DEBUG(LOG_INFO, "message too short, ignoring");
+	return -2;
+	}
+
+	if (bytes < ntohs(packet.ip.tot_len)) {
+	DEBUG(LOG_INFO, "Truncated packet");
+	return -2;
+	}
+
+	/* ignore any extra garbage bytes */
+	bytes = ntohs(packet.ip.tot_len);
+
+	/* Make sure its the right packet for us, and that it passes sanity checks */
+	if (packet.ip.protocol != IPPROTO_UDP \|\| packet.ip.version != IPVERSION \|\|
+	packet.ip.ihl != sizeof(packet.ip) >> 2 \|\| packet.udp.dest != htons(CLIENT_PORT) \|\|
+	bytes > (int) sizeof(struct udp_dhcp_packet) \|\|
+	ntohs(packet.udp.len) != (short) (bytes - sizeof(packet.ip))) {
+	DEBUG(LOG_INFO, "unrelated/bogus packet");
+	return -2;
+	}
+
+	/* check IP checksum */
+	check = packet.ip.check;
+	packet.ip.check = 0;
+	if (check != checksum(&(packet.ip), sizeof(packet.ip))) {
+	DEBUG(LOG_INFO, "bad IP header checksum, ignoring");
+	return -1;
+	}
+
+	/* verify the UDP checksum by replacing the header with a psuedo header */
+	source = packet.ip.saddr;
+	dest = packet.ip.daddr;
+	check = packet.udp.check;
+	packet.udp.check = 0;
+	memset(&packet.ip, 0, sizeof(packet.ip));
+
+	packet.ip.protocol = IPPROTO_UDP;
+	packet.ip.saddr = source;
+	packet.ip.daddr = dest;
+	packet.ip.tot_len = packet.udp.len; /* cheat on the psuedo-header */
+	if (check && check != checksum(&packet, bytes)) {
+	DEBUG(LOG_ERR, "packet with bad UDP checksum received, ignoring");
+	return -2;
+	}
+
+	memcpy(payload, &(packet.data), bytes - (sizeof(packet.ip) + sizeof(packet.udp)));
+
+	if (ntohl(payload->cookie) != DHCP_MAGIC) {
+	LOG(LOG_ERR, "received bogus message (bad magic) -- ignoring");
+	return -2;
+	}
+	DEBUG(LOG_INFO, "oooooh!!! got some!");
+	return bytes - (sizeof(packet.ip) + sizeof(packet.udp));
+
+	}
+

networking/udhcp/clientpacket.h+12 -0

@@ -0,0 +1,12 @@
+	#ifndef _CLIENTPACKET_H
+	#define _CLIENTPACKET_H
+
+	unsigned long random_xid(void);
+	int send_discover(unsigned long xid, unsigned long requested);
+	int send_selecting(unsigned long xid, unsigned long server, unsigned long requested);
+	int send_renew(unsigned long xid, unsigned long server, unsigned long ciaddr);
+	int send_renew(unsigned long xid, unsigned long server, unsigned long ciaddr);
+	int send_release(unsigned long server, unsigned long ciaddr);
+	int get_raw_packet(struct dhcpMessage *payload, int fd);
+
+	#endif

networking/udhcp/config.in+18 -0

@@ -0,0 +1,18 @@
+	#
+	# For a description of the syntax of this configuration file,
+	# see scripts/kbuild/config-language.txt.
+	#
+
+	mainmenu_option next_comment
+	comment 'udhcp Server/Client'
+
+	bool 'udhcp Server (udhcpd)' CONFIG_UDHCPD
+	bool 'udhcp Client (udhcpc)' CONFIG_UDHCPC
+	bool 'Lease display utility (dumpleases)' CONFIG_DUMPLEASES
+	if [ "$CONFIG_UDHCPD" = "y" -o "$CONFIG_UDHCPC" = "y" ]; then
+	bool ' Log udhcp messages to syslog (instead of stdout)' CONFIG_FEATURE_UDHCP_SYSLOG
+	bool ' Compile udhcp with noisy debugging messages' CONFIG_FEATURE_UDHCP_DEBUG
+	fi
+
+	endmenu
+

networking/udhcp/debug.h+41 -0

@@ -0,0 +1,41 @@
+	#ifndef _DEBUG_H
+	#define _DEBUG_H
+
+	#include "libbb_udhcp.h"
+
+	#include <stdio.h>
+	#ifdef SYSLOG
+	#include <syslog.h>
+	#endif
+
+
+	#ifdef SYSLOG
+	# define LOG(level, str, args...) do { printf(str, ## args); \
+	printf("\n"); \
+	syslog(level, str, ## args); } while(0)
+	# define OPEN_LOG(name) openlog(name, 0, 0)
+	#define CLOSE_LOG() closelog()
+	#else
+	# define LOG_EMERG "EMERGENCY!"
+	# define LOG_ALERT "ALERT!"
+	# define LOG_CRIT "critical!"
+	# define LOG_WARNING "warning"
+	# define LOG_ERR "error"
+	# define LOG_INFO "info"
+	# define LOG_DEBUG "debug"
+	# define LOG(level, str, args...) do { printf("%s, ", level); \
+	printf(str, ## args); \
+	printf("\n"); } while(0)
+	# define OPEN_LOG(name) do {;} while(0)
+	#define CLOSE_LOG() do {;} while(0)
+	#endif
+
+	#ifdef DEBUG
+	# undef DEBUG
+	# define DEBUG(level, str, args...) LOG(level, str, ## args)
+	# define DEBUGGING
+	#else
+	# define DEBUG(level, str, args...) do {;} while(0)
+	#endif
+
+	#endif

networking/udhcp/dhcpc.c+559 -0

@@ -0,0 +1,559 @@
+	/* dhcpc.c
+	*
+	* udhcp DHCP client
+	*
+	* Russ Dill <[email protected]> July 2001
+	*
+	* This program is free software; you can redistribute it and/or modify
+	* it under the terms of the GNU General Public License as published by
+	* the Free Software Foundation; either version 2 of the License, or
+	* (at your option) any later version.
+	*
+	* This program is distributed in the hope that it will be useful,
+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	* GNU General Public License for more details.
+	*
+	* You should have received a copy of the GNU General Public License
+	* along with this program; if not, write to the Free Software
+	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+	*/
+
+	#include <stdio.h>
+	#include <sys/time.h>
+	#include <sys/types.h>
+	#include <sys/file.h>
+	#include <unistd.h>
+	#include <getopt.h>
+	#include <stdlib.h>
+	#include <sys/socket.h>
+	#include <netinet/in.h>
+	#include <arpa/inet.h>
+	#include <signal.h>
+	#include <time.h>
+	#include <string.h>
+	#include <sys/ioctl.h>
+	#include <net/if.h>
+	#include <errno.h>
+
+	#include "dhcpd.h"
+	#include "dhcpc.h"
+	#include "options.h"
+	#include "clientpacket.h"
+	#include "packet.h"
+	#include "script.h"
+	#include "socket.h"
+	#include "debug.h"
+	#include "pidfile.h"
+
+	static int state;
+	static unsigned long requested_ip; /* = 0 */
+	static unsigned long server_addr;
+	static unsigned long timeout;
+	static int packet_num; /* = 0 */
+	static int fd;
+	static int signal_pipe[2];
+
+	#define LISTEN_NONE 0
+	#define LISTEN_KERNEL 1
+	#define LISTEN_RAW 2
+	static int listen_mode;
+
+	#define DEFAULT_SCRIPT "/usr/share/udhcpc/default.script"
+
+	struct client_config_t client_config = {
+	/* Default options. */
+	abort_if_no_lease: 0,
+	foreground: 0,
+	quit_after_lease: 0,
+	background_if_no_lease: 0,
+	interface: "eth0",
+	pidfile: NULL,
+	script: DEFAULT_SCRIPT,
+	clientid: NULL,
+	hostname: NULL,
+	ifindex: 0,
+	arp: "\0\0\0\0\0\0", /* appease gcc-3.0 */
+	};
+
+	#ifndef BB_VER
+	static void show_usage(void)
+	{
+	printf(
+	"Usage: udhcpc [OPTIONS]\n\n"
+	" -c, --clientid=CLIENTID Client identifier\n"
+	" -H, --hostname=HOSTNAME Client hostname\n"
+	" -h Alias for -H\n"
+	" -f, --foreground Do not fork after getting lease\n"
+	" -b, --background Fork to background if lease cannot be\n"
+	" immediately negotiated.\n"
+	" -i, --interface=INTERFACE Interface to use (default: eth0)\n"
+	" -n, --now Exit with failure if lease cannot be\n"
+	" immediately negotiated.\n"
+	" -p, --pidfile=file Store process ID of daemon in file\n"
+	" -q, --quit Quit after obtaining lease\n"
+	" -r, --request=IP IP address to request (default: none)\n"
+	" -s, --script=file Run file at dhcp events (default:\n"
+	" " DEFAULT_SCRIPT ")\n"
+	" -v, --version Display version\n"
+	);
+	exit(0);
+	}
+	#endif
+
+
+	/* just a little helper */
+	static void change_mode(int new_mode)
+	{
+	DEBUG(LOG_INFO, "entering %s listen mode",
+	new_mode ? (new_mode == 1 ? "kernel" : "raw") : "none");
+	close(fd);
+	fd = -1;
+	listen_mode = new_mode;
+	}
+
+
+	/* perform a renew */
+	static void perform_renew(void)
+	{
+	LOG(LOG_INFO, "Performing a DHCP renew");
+	switch (state) {
+	case RENEWING:
+	run_script(NULL, "deconfig");
+	case BOUND:
+	case REBINDING:
+	change_mode(LISTEN_KERNEL);
+	state = RENEW_REQUESTED;
+	break;
+	case RENEW_REQUESTED:
+	case REQUESTING:
+	case RELEASED:
+	change_mode(LISTEN_RAW);
+	state = INIT_SELECTING;
+	break;
+	case INIT_SELECTING:
+	}
+
+	/* start things over */
+	packet_num = 0;
+
+	/* Kill any timeouts because the user wants this to hurry along */
+	timeout = 0;
+	}
+
+
+	/* perform a release */
+	static void perform_release(void)
+	{
+	char buffer[16];
+	struct in_addr temp_addr;
+
+	/* send release packet */
+	if (state == BOUND \|\| state == RENEWING \|\| state == REBINDING) {
+	temp_addr.s_addr = server_addr;
+	sprintf(buffer, "%s", inet_ntoa(temp_addr));
+	temp_addr.s_addr = requested_ip;
+	LOG(LOG_INFO, "Unicasting a release of %s to %s",
+	inet_ntoa(temp_addr), buffer);
+	send_release(server_addr, requested_ip); /* unicast */
+	run_script(NULL, "deconfig");
+	}
+	LOG(LOG_INFO, "Entering released state");
+
+	change_mode(LISTEN_NONE);
+	state = RELEASED;
+	timeout = 0x7fffffff;
+	}
+
+
+	/* Exit and cleanup */
+	static void exit_client(int retval)
+	{
+	pidfile_delete(client_config.pidfile);
+	CLOSE_LOG();
+	exit(retval);
+	}
+
+
+	/* Signal handler */
+	static void signal_handler(int sig)
+	{
+	if (send(signal_pipe[1], &sig, sizeof(sig), MSG_DONTWAIT) < 0) {
+	LOG(LOG_ERR, "Could not send signal: %s",
+	strerror(errno));
+	}
+	}
+
+
+	static void background(void)
+	{
+	int pid_fd;
+
+	pid_fd = pidfile_acquire(client_config.pidfile); /* hold lock during fork. */
+	while (pid_fd >= 0 && pid_fd < 3) pid_fd = dup(pid_fd); /* don't let daemon close it */
+	if (daemon(0, 0) == -1) {
+	perror("fork");
+	exit_client(1);
+	}
+	client_config.foreground = 1; /* Do not fork again. */
+	pidfile_write_release(pid_fd);
+	}
+
+
+	#ifdef COMBINED_BINARY
+	int udhcpc_main(int argc, char *argv[])
+	#else
+	int main(int argc, char *argv[])
+	#endif
+	{
+	unsigned char temp, message;
+	unsigned long t1 = 0, t2 = 0, xid = 0;
+	unsigned long start = 0, lease;
+	fd_set rfds;
+	int retval;
+	struct timeval tv;
+	int c, len;
+	struct dhcpMessage packet;
+	struct in_addr temp_addr;
+	int pid_fd;
+	time_t now;
+	int max_fd;
+	int sig;
+
+	static struct option arg_options[] = {
+	{"clientid", required_argument, 0, 'c'},
+	{"foreground", no_argument, 0, 'f'},
+	{"background", no_argument, 0, 'b'},
+	{"hostname", required_argument, 0, 'H'},
+	{"hostname", required_argument, 0, 'h'},
+	{"interface", required_argument, 0, 'i'},
+	{"now", no_argument, 0, 'n'},
+	{"pidfile", required_argument, 0, 'p'},
+	{"quit", no_argument, 0, 'q'},
+	{"request", required_argument, 0, 'r'},
+	{"script", required_argument, 0, 's'},
+	{"version", no_argument, 0, 'v'},
+	{"help", no_argument, 0, '?'},
+	{0, 0, 0, 0}
+	};
+
+	/* get options */
+	while (1) {
+	int option_index = 0;
+	c = getopt_long(argc, argv, "c:fbH:h:i:np:qr:s:v", arg_options, &option_index);
+	if (c == -1) break;
+
+	switch (c) {
+	case 'c':
+	len = strlen(optarg) > 255 ? 255 : strlen(optarg);
+	if (client_config.clientid) free(client_config.clientid);
+	client_config.clientid = xmalloc(len + 2);
+	client_config.clientid[OPT_CODE] = DHCP_CLIENT_ID;
+	client_config.clientid[OPT_LEN] = len;
+	client_config.clientid[OPT_DATA] = '\0';
+	strncpy(client_config.clientid + OPT_DATA, optarg, len);
+	break;
+	case 'f':
+	client_config.foreground = 1;
+	break;
+	case 'b':
+	client_config.background_if_no_lease = 1;
+	break;
+	case 'h':
+	case 'H':
+	len = strlen(optarg) > 255 ? 255 : strlen(optarg);
+	if (client_config.hostname) free(client_config.hostname);
+	client_config.hostname = xmalloc(len + 2);
+	client_config.hostname[OPT_CODE] = DHCP_HOST_NAME;
+	client_config.hostname[OPT_LEN] = len;
+	strncpy(client_config.hostname + 2, optarg, len);
+	break;
+	case 'i':
+	client_config.interface = optarg;
+	break;
+	case 'n':
+	client_config.abort_if_no_lease = 1;
+	break;
+	case 'p':
+	client_config.pidfile = optarg;
+	break;
+	case 'q':
+	client_config.quit_after_lease = 1;
+	break;
+	case 'r':
+	requested_ip = inet_addr(optarg);
+	break;
+	case 's':
+	client_config.script = optarg;
+	break;
+	case 'v':
+	printf("udhcpcd, version %s\n\n", VERSION);
+	exit_client(0);
+	break;
+	default:
+	show_usage();
+	}
+	}
+
+	OPEN_LOG("udhcpc");
+	LOG(LOG_INFO, "udhcp client (v%s) started", VERSION);
+
+	pid_fd = pidfile_acquire(client_config.pidfile);
+	pidfile_write_release(pid_fd);
+
+	if (read_interface(client_config.interface, &client_config.ifindex,
+	NULL, client_config.arp) < 0)
+	exit_client(1);
+
+	if (!client_config.clientid) {
+	client_config.clientid = xmalloc(6 + 3);
+	client_config.clientid[OPT_CODE] = DHCP_CLIENT_ID;
+	client_config.clientid[OPT_LEN] = 7;
+	client_config.clientid[OPT_DATA] = 1;
+	memcpy(client_config.clientid + 3, client_config.arp, 6);
+	}
+
+	/* setup signal handlers */
+	socketpair(AF_UNIX, SOCK_STREAM, 0, signal_pipe);
+	signal(SIGUSR1, signal_handler);
+	signal(SIGUSR2, signal_handler);
+	signal(SIGTERM, signal_handler);
+
+	state = INIT_SELECTING;
+	run_script(NULL, "deconfig");
+	change_mode(LISTEN_RAW);
+
+	for (;;) {
+
+	tv.tv_sec = timeout - time(0);
+	tv.tv_usec = 0;
+	FD_ZERO(&rfds);
+
+	if (listen_mode != LISTEN_NONE && fd < 0) {
+	if (listen_mode == LISTEN_KERNEL)
+	fd = listen_socket(INADDR_ANY, CLIENT_PORT, client_config.interface);
+	else
+	fd = raw_socket(client_config.ifindex);
+	if (fd < 0) {
+	LOG(LOG_ERR, "FATAL: couldn't listen on socket, %s", strerror(errno));
+	exit_client(0);
+	}
+	}
+	if (fd >= 0) FD_SET(fd, &rfds);
+	FD_SET(signal_pipe[0], &rfds);
+
+	if (tv.tv_sec > 0) {
+	DEBUG(LOG_INFO, "Waiting on select...\n");
+	max_fd = signal_pipe[0] > fd ? signal_pipe[0] : fd;
+	retval = select(max_fd + 1, &rfds, NULL, NULL, &tv);
+	} else retval = 0; /* If we already timed out, fall through */
+
+	now = time(0);
+	if (retval == 0) {
+	/* timeout dropped to zero */
+	switch (state) {
+	case INIT_SELECTING:
+	if (packet_num < 3) {
+	if (packet_num == 0)
+	xid = random_xid();
+
+	/* send discover packet */
+	send_discover(xid, requested_ip); /* broadcast */
+
+	timeout = now + ((packet_num == 2) ? 4 : 2);
+	packet_num++;
+	} else {
+	if (client_config.background_if_no_lease) {
+	LOG(LOG_INFO, "No lease, forking to background.");
+	background();
+	} else if (client_config.abort_if_no_lease) {
+	LOG(LOG_INFO, "No lease, failing.");
+	exit_client(1);
+	}
+	/* wait to try again */
+	packet_num = 0;
+	timeout = now + 60;
+	}
+	break;
+	case RENEW_REQUESTED:
+	case REQUESTING:
+	if (packet_num < 3) {
+	/* send request packet */
+	if (state == RENEW_REQUESTED)
+	send_renew(xid, server_addr, requested_ip); /* unicast */
+	else send_selecting(xid, server_addr, requested_ip); /* broadcast */
+
+	timeout = now + ((packet_num == 2) ? 10 : 2);
+	packet_num++;
+	} else {
+	/* timed out, go back to init state */
+	state = INIT_SELECTING;
+	timeout = now;
+	packet_num = 0;
+	change_mode(LISTEN_RAW);
+	}
+	break;
+	case BOUND:
+	/* Lease is starting to run out, time to enter renewing state */
+	state = RENEWING;
+	change_mode(LISTEN_KERNEL);
+	DEBUG(LOG_INFO, "Entering renew state");
+	/* fall right through */
+	case RENEWING:
+	/* Either set a new T1, or enter REBINDING state */
+	if ((t2 - t1) <= (lease / 14400 + 1)) {
+	/* timed out, enter rebinding state */
+	state = REBINDING;
+	timeout = now + (t2 - t1);
+	DEBUG(LOG_INFO, "Entering rebinding state");
+	} else {
+	/* send a request packet */
+	send_renew(xid, server_addr, requested_ip); /* unicast */
+
+	t1 = (t2 - t1) / 2 + t1;
+	timeout = t1 + start;
+	}
+	break;
+	case REBINDING:
+	/* Either set a new T2, or enter INIT state */
+	if ((lease - t2) <= (lease / 14400 + 1)) {
+	/* timed out, enter init state */
+	state = INIT_SELECTING;
+	LOG(LOG_INFO, "Lease lost, entering init state");
+	run_script(NULL, "deconfig");
+	timeout = now;
+	packet_num = 0;
+	change_mode(LISTEN_RAW);
+	} else {
+	/* send a request packet */
+	send_renew(xid, 0, requested_ip); /* broadcast */
+
+	t2 = (lease - t2) / 2 + t2;
+	timeout = t2 + start;
+	}
+	break;
+	case RELEASED:
+	/* yah, I know, you say it would never happen */
+	timeout = 0x7fffffff;
+	break;
+	}
+	} else if (retval > 0 && listen_mode != LISTEN_NONE && FD_ISSET(fd, &rfds)) {
+	/* a packet is ready, read it */
+
+	if (listen_mode == LISTEN_KERNEL)
+	len = get_packet(&packet, fd);
+	else len = get_raw_packet(&packet, fd);
+
+	if (len == -1 && errno != EINTR) {
+	DEBUG(LOG_INFO, "error on read, %s, reopening socket", strerror(errno));
+	change_mode(listen_mode); /* just close and reopen */
+	}
+	if (len < 0) continue;
+
+	if (packet.xid != xid) {
+	DEBUG(LOG_INFO, "Ignoring XID %lx (our xid is %lx)",
+	(unsigned long) packet.xid, xid);
+	continue;
+	}
+
+	if ((message = get_option(&packet, DHCP_MESSAGE_TYPE)) == NULL) {
+	DEBUG(LOG_ERR, "couldnt get option from packet -- ignoring");
+	continue;
+	}
+
+	switch (state) {
+	case INIT_SELECTING:
+	/* Must be a DHCPOFFER to one of our xid's */
+	if (*message == DHCPOFFER) {
+	if ((temp = get_option(&packet, DHCP_SERVER_ID))) {
+	memcpy(&server_addr, temp, 4);
+	xid = packet.xid;
+	requested_ip = packet.yiaddr;
+
+	/* enter requesting state */
+	state = REQUESTING;
+	timeout = now;
+	packet_num = 0;
+	} else {
+	DEBUG(LOG_ERR, "No server ID in message");
+	}
+	}
+	break;
+	case RENEW_REQUESTED:
+	case REQUESTING:
+	case RENEWING:
+	case REBINDING:
+	if (*message == DHCPACK) {
+	if (!(temp = get_option(&packet, DHCP_LEASE_TIME))) {
+	LOG(LOG_ERR, "No lease time with ACK, using 1 hour lease");
+	lease = 60 * 60;
+	} else {
+	memcpy(&lease, temp, 4);
+	lease = ntohl(lease);
+	}
+
+	/* enter bound state */
+	t1 = lease / 2;
+
+	/* little fixed point for n * .875 */
+	t2 = (lease * 0x7) >> 3;
+	temp_addr.s_addr = packet.yiaddr;
+	LOG(LOG_INFO, "Lease of %s obtained, lease time %ld",
+	inet_ntoa(temp_addr), lease);
+	start = now;
+	timeout = t1 + start;
+	requested_ip = packet.yiaddr;
+	run_script(&packet,
+	((state == RENEWING \|\| state == REBINDING) ? "renew" : "bound"));
+
+	state = BOUND;
+	change_mode(LISTEN_NONE);
+	if (client_config.quit_after_lease)
+	exit_client(0);
+	if (!client_config.foreground)
+	background();
+
+	} else if (*message == DHCPNAK) {
+	/* return to init state */
+	LOG(LOG_INFO, "Received DHCP NAK");
+	run_script(&packet, "nak");
+	if (state != REQUESTING)
+	run_script(NULL, "deconfig");
+	state = INIT_SELECTING;
+	timeout = now;
+	requested_ip = 0;
+	packet_num = 0;
+	change_mode(LISTEN_RAW);
+	sleep(3); /* avoid excessive network traffic */
+	}
+	break;
+	/* case BOUND, RELEASED: - ignore all packets */
+	}
+	} else if (retval > 0 && FD_ISSET(signal_pipe[0], &rfds)) {
+	if (read(signal_pipe[0], &sig, sizeof(signal)) < 0) {
+	DEBUG(LOG_ERR, "Could not read signal: %s",
+	strerror(errno));
+	continue; /* probably just EINTR */
+	}
+	switch (sig) {
+	case SIGUSR1:
+	perform_renew();
+	break;
+	case SIGUSR2:
+	perform_release();
+	break;
+	case SIGTERM:
+	LOG(LOG_INFO, "Received SIGTERM");
+	exit_client(0);
+	}
+	} else if (retval == -1 && errno == EINTR) {
+	/* a signal was caught */
+	} else {
+	/* An error occured */
+	DEBUG(LOG_ERR, "Error on select");
+	}
+
+	}
+	return 0;
+	}
+

networking/udhcp/dhcpc.h+34 -0

@@ -0,0 +1,34 @@
+	/* dhcpc.h */
+	#ifndef _DHCPC_H
+	#define _DHCPC_H
+
+	#include "libbb_udhcp.h"
+
+	#define INIT_SELECTING 0
+	#define REQUESTING 1
+	#define BOUND 2
+	#define RENEWING 3
+	#define REBINDING 4
+	#define INIT_REBOOT 5
+	#define RENEW_REQUESTED 6
+	#define RELEASED 7
+
+
+	struct client_config_t {
+	char foreground; /* Do not fork */
+	char quit_after_lease; /* Quit after obtaining lease */
+	char abort_if_no_lease; /* Abort if no lease */
+	char background_if_no_lease; /* Fork to background if no lease */
+	char interface; / The name of the interface to use */
+	char pidfile; / Optionally store the process ID */
+	char script; / User script to run at dhcp events */
+	unsigned char clientid; / Optional client id to use */
+	unsigned char hostname; / Optional hostname to use */
+	int ifindex; /* Index number of the interface to use */
+	unsigned char arp[6]; /* Our arp address */
+	};
+
+	extern struct client_config_t client_config;
+
+
+	#endif

networking/udhcp/dhcpd.c+287 -0

@@ -0,0 +1,287 @@
+	/* dhcpd.c
+	*
+	* udhcp Server
+	* Copyright (C) 1999 Matthew Ramsay <[email protected]>
+	* Chris Trew <[email protected]>
+	*
+	* Rewrite by Russ Dill <[email protected]> July 2001
+	*
+	* This program is free software; you can redistribute it and/or modify
+	* it under the terms of the GNU General Public License as published by
+	* the Free Software Foundation; either version 2 of the License, or
+	* (at your option) any later version.
+	*
+	* This program is distributed in the hope that it will be useful,
+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	* GNU General Public License for more details.
+	*
+	* You should have received a copy of the GNU General Public License
+	* along with this program; if not, write to the Free Software
+	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+	*/
+
+	#include <fcntl.h>
+	#include <string.h>
+	#include <stdlib.h>
+	#include <sys/wait.h>
+	#include <sys/stat.h>
+	#include <arpa/inet.h>
+	#include <netdb.h>
+	#include <netinet/in.h>
+	#include <stdio.h>
+	#include <sys/types.h>
+	#include <sys/socket.h>
+	#include <unistd.h>
+	#include <signal.h>
+	#include <errno.h>
+	#include <sys/ioctl.h>
+	#include <time.h>
+	#include <sys/time.h>
+
+	#include "debug.h"
+	#include "dhcpd.h"
+	#include "arpping.h"
+	#include "socket.h"
+	#include "options.h"
+	#include "files.h"
+	#include "leases.h"
+	#include "packet.h"
+	#include "serverpacket.h"
+	#include "pidfile.h"
+
+
+	/* globals */
+	struct dhcpOfferedAddr *leases;
+	struct server_config_t server_config;
+	static int signal_pipe[2];
+
+	/* Exit and cleanup */
+	static void exit_server(int retval)
+	{
+	pidfile_delete(server_config.pidfile);
+	CLOSE_LOG();
+	exit(retval);
+	}
+
+
+	/* Signal handler */
+	static void signal_handler(int sig)
+	{
+	if (send(signal_pipe[1], &sig, sizeof(sig), MSG_DONTWAIT) < 0) {
+	LOG(LOG_ERR, "Could not send signal: %s",
+	strerror(errno));
+	}
+	}
+
+
+	#ifdef COMBINED_BINARY
+	int udhcpd_main(int argc, char *argv[])
+	#else
+	int main(int argc, char *argv[])
+	#endif
+	{
+	fd_set rfds;
+	struct timeval tv;
+	int server_socket = -1;
+	int bytes, retval;
+	struct dhcpMessage packet;
+	unsigned char *state;
+	unsigned char server_id, requested;
+	u_int32_t server_id_align, requested_align;
+	unsigned long timeout_end;
+	struct option_set *option;
+	struct dhcpOfferedAddr *lease;
+	int pid_fd;
+	int max_sock;
+	int sig;
+
+	OPEN_LOG("udhcpd");
+	LOG(LOG_INFO, "udhcp server (v%s) started", VERSION);
+
+	memset(&server_config, 0, sizeof(struct server_config_t));
+
+	if (argc < 2)
+	read_config(DHCPD_CONF_FILE);
+	else read_config(argv[1]);
+
+	pid_fd = pidfile_acquire(server_config.pidfile);
+	pidfile_write_release(pid_fd);
+
+	if ((option = find_option(server_config.options, DHCP_LEASE_TIME))) {
+	memcpy(&server_config.lease, option->data + 2, 4);
+	server_config.lease = ntohl(server_config.lease);
+	}
+	else server_config.lease = LEASE_TIME;
+
+	leases = malloc(sizeof(struct dhcpOfferedAddr) * server_config.max_leases);
+	memset(leases, 0, sizeof(struct dhcpOfferedAddr) * server_config.max_leases);
+	read_leases(server_config.lease_file);
+
+	if (read_interface(server_config.interface, &server_config.ifindex,
+	&server_config.server, server_config.arp) < 0)
+	exit_server(1);
+
+	#ifndef DEBUGGING
+	pid_fd = pidfile_acquire(server_config.pidfile); /* hold lock during fork. */
+	if (daemon(0, 0) == -1) {
+	perror("fork");
+	exit_server(1);
+	}
+	pidfile_write_release(pid_fd);
+	#endif
+
+
+	socketpair(AF_UNIX, SOCK_STREAM, 0, signal_pipe);
+	signal(SIGUSR1, signal_handler);
+	signal(SIGTERM, signal_handler);
+
+	timeout_end = time(0) + server_config.auto_time;
+	while(1) { /* loop until universe collapses */
+
+	if (server_socket < 0)
+	if ((server_socket = listen_socket(INADDR_ANY, SERVER_PORT, server_config.interface)) < 0) {
+	LOG(LOG_ERR, "FATAL: couldn't create server socket, %s", strerror(errno));
+	exit_server(0);
+	}
+
+	FD_ZERO(&rfds);
+	FD_SET(server_socket, &rfds);
+	FD_SET(signal_pipe[0], &rfds);
+	if (server_config.auto_time) {
+	tv.tv_sec = timeout_end - time(0);
+	tv.tv_usec = 0;
+	}
+	if (!server_config.auto_time \|\| tv.tv_sec > 0) {
+	max_sock = server_socket > signal_pipe[0] ? server_socket : signal_pipe[0];
+	retval = select(max_sock + 1, &rfds, NULL, NULL,
+	server_config.auto_time ? &tv : NULL);
+	} else retval = 0; /* If we already timed out, fall through */
+
+	if (retval == 0) {
+	write_leases();
+	timeout_end = time(0) + server_config.auto_time;
+	continue;
+	} else if (retval < 0 && errno != EINTR) {
+	DEBUG(LOG_INFO, "error on select");
+	continue;
+	}
+
+	if (FD_ISSET(signal_pipe[0], &rfds)) {
+	if (read(signal_pipe[0], &sig, sizeof(sig)) < 0)
+	continue; /* probably just EINTR */
+	switch (sig) {
+	case SIGUSR1:
+	LOG(LOG_INFO, "Received a SIGUSR1");
+	write_leases();
+	/* why not just reset the timeout, eh */
+	timeout_end = time(0) + server_config.auto_time;
+	continue;
+	case SIGTERM:
+	LOG(LOG_INFO, "Received a SIGTERM");
+	exit_server(0);
+	}
+	}
+
+	if ((bytes = get_packet(&packet, server_socket)) < 0) { /* this waits for a packet - idle */
+	if (bytes == -1 && errno != EINTR) {
+	DEBUG(LOG_INFO, "error on read, %s, reopening socket", strerror(errno));
+	close(server_socket);
+	server_socket = -1;
+	}
+	continue;
+	}
+
+	if ((state = get_option(&packet, DHCP_MESSAGE_TYPE)) == NULL) {
+	DEBUG(LOG_ERR, "couldn't get option from packet, ignoring");
+	continue;
+	}
+
+	/* ADDME: look for a static lease */
+	lease = find_lease_by_chaddr(packet.chaddr);
+	switch (state[0]) {
+	case DHCPDISCOVER:
+	DEBUG(LOG_INFO,"received DISCOVER");
+
+	if (sendOffer(&packet) < 0) {
+	LOG(LOG_ERR, "send OFFER failed");
+	}
+	break;
+	case DHCPREQUEST:
+	DEBUG(LOG_INFO, "received REQUEST");
+
+	requested = get_option(&packet, DHCP_REQUESTED_IP);
+	server_id = get_option(&packet, DHCP_SERVER_ID);
+
+	if (requested) memcpy(&requested_align, requested, 4);
+	if (server_id) memcpy(&server_id_align, server_id, 4);
+
+	if (lease) { /ADDME: or static lease /
+	if (server_id) {
+	/* SELECTING State */
+	DEBUG(LOG_INFO, "server_id = %08x", ntohl(server_id_align));
+	if (server_id_align == server_config.server && requested &&
+	requested_align == lease->yiaddr) {
+	sendACK(&packet, lease->yiaddr);
+	}
+	} else {
+	if (requested) {
+	/* INIT-REBOOT State */
+	if (lease->yiaddr == requested_align)
+	sendACK(&packet, lease->yiaddr);
+	else sendNAK(&packet);
+	} else {
+	/* RENEWING or REBINDING State */
+	if (lease->yiaddr == packet.ciaddr)
+	sendACK(&packet, lease->yiaddr);
+	else {
+	/* don't know what to do!!!! */
+	sendNAK(&packet);
+	}
+	}
+	}
+
+	/* what to do if we have no record of the client */
+	} else if (server_id) {
+	/* SELECTING State */
+
+	} else if (requested) {
+	/* INIT-REBOOT State */
+	if ((lease = find_lease_by_yiaddr(requested_align))) {
+	if (lease_expired(lease)) {
+	/* probably best if we drop this lease */
+	memset(lease->chaddr, 0, 16);
+	/* make some contention for this address */
+	} else sendNAK(&packet);
+	} else if (requested_align < server_config.start \|\|
+	requested_align > server_config.end) {
+	sendNAK(&packet);
+	} /* else remain silent */
+
+	} else {
+	/* RENEWING or REBINDING State */
+	}
+	break;
+	case DHCPDECLINE:
+	DEBUG(LOG_INFO,"received DECLINE");
+	if (lease) {
+	memset(lease->chaddr, 0, 16);
+	lease->expires = time(0) + server_config.decline_time;
+	}
+	break;
+	case DHCPRELEASE:
+	DEBUG(LOG_INFO,"received RELEASE");
+	if (lease) lease->expires = time(0);
+	break;
+	case DHCPINFORM:
+	DEBUG(LOG_INFO,"received INFORM");
+	send_inform(&packet);
+	break;
+	default:
+	LOG(LOG_WARNING, "unsupported DHCP message (%02x) -- ignoring", state[0]);
+	}
+	}
+
+	return 0;
+	}
+

networking/udhcp/dhcpd.h+131 -0

@@ -0,0 +1,131 @@
+	/* dhcpd.h */
+	#ifndef _DHCPD_H
+	#define _DHCPD_H
+
+	#include <netinet/ip.h>
+	#include <netinet/udp.h>
+
+	#include "libbb_udhcp.h"
+	#include "leases.h"
+
+	/************************************/
+	/* Defaults _you_ may want to tweak */
+	/************************************/
+
+	/* the period of time the client is allowed to use that address */
+	#define LEASE_TIME (60602410) / 10 days of seconds */
+
+	/* where to find the DHCP server configuration file */
+	#define DHCPD_CONF_FILE "/etc/udhcpd.conf"
+
+	/*****************************************************************/
+	/* Do not modify below here unless you know what you are doing!! */
+	/*****************************************************************/
+
+	/* DHCP protocol -- see RFC 2131 */
+	#define SERVER_PORT 67
+	#define CLIENT_PORT 68
+
+	#define DHCP_MAGIC 0x63825363
+
+	/* DHCP option codes (partial list) */
+	#define DHCP_PADDING 0x00
+	#define DHCP_SUBNET 0x01
+	#define DHCP_TIME_OFFSET 0x02
+	#define DHCP_ROUTER 0x03
+	#define DHCP_TIME_SERVER 0x04
+	#define DHCP_NAME_SERVER 0x05
+	#define DHCP_DNS_SERVER 0x06
+	#define DHCP_LOG_SERVER 0x07
+	#define DHCP_COOKIE_SERVER 0x08
+	#define DHCP_LPR_SERVER 0x09
+	#define DHCP_HOST_NAME 0x0c
+	#define DHCP_BOOT_SIZE 0x0d
+	#define DHCP_DOMAIN_NAME 0x0f
+	#define DHCP_SWAP_SERVER 0x10
+	#define DHCP_ROOT_PATH 0x11
+	#define DHCP_IP_TTL 0x17
+	#define DHCP_MTU 0x1a
+	#define DHCP_BROADCAST 0x1c
+	#define DHCP_NTP_SERVER 0x2a
+	#define DHCP_WINS_SERVER 0x2c
+	#define DHCP_REQUESTED_IP 0x32
+	#define DHCP_LEASE_TIME 0x33
+	#define DHCP_OPTION_OVER 0x34
+	#define DHCP_MESSAGE_TYPE 0x35
+	#define DHCP_SERVER_ID 0x36
+	#define DHCP_PARAM_REQ 0x37
+	#define DHCP_MESSAGE 0x38
+	#define DHCP_MAX_SIZE 0x39
+	#define DHCP_T1 0x3a
+	#define DHCP_T2 0x3b
+	#define DHCP_VENDOR 0x3c
+	#define DHCP_CLIENT_ID 0x3d
+
+	#define DHCP_END 0xFF
+
+
+	#define BOOTREQUEST 1
+	#define BOOTREPLY 2
+
+	#define ETH_10MB 1
+	#define ETH_10MB_LEN 6
+
+	#define DHCPDISCOVER 1
+	#define DHCPOFFER 2
+	#define DHCPREQUEST 3
+	#define DHCPDECLINE 4
+	#define DHCPACK 5
+	#define DHCPNAK 6
+	#define DHCPRELEASE 7
+	#define DHCPINFORM 8
+
+	#define BROADCAST_FLAG 0x8000
+
+	#define OPTION_FIELD 0
+	#define FILE_FIELD 1
+	#define SNAME_FIELD 2
+
+	/* miscellaneous defines */
+	#define MAC_BCAST_ADDR (unsigned char *) "\xff\xff\xff\xff\xff\xff"
+	#define OPT_CODE 0
+	#define OPT_LEN 1
+	#define OPT_DATA 2
+
+	struct option_set {
+	unsigned char *data;
+	struct option_set *next;
+	};
+
+	struct server_config_t {
+	u_int32_t server; /* Our IP, in network order */
+	u_int32_t start; /* Start address of leases, network order */
+	u_int32_t end; /* End of leases, network order */
+	struct option_set options; / List of DHCP options loaded from the config file */
+	char interface; / The name of the interface to use */
+	int ifindex; /* Index number of the interface to use */
+	unsigned char arp[6]; /* Our arp address */
+	unsigned long lease; /* lease time in seconds (host order) */
+	unsigned long max_leases; /* maximum number of leases (including reserved address) */
+	char remaining; /* should the lease file be interpreted as lease time remaining, or
+	* as the time the lease expires */
+	unsigned long auto_time; /* how long should udhcpd wait before writing a config file.
+	* if this is zero, it will only write one on SIGUSR1 */
+	unsigned long decline_time; /* how long an address is reserved if a client returns a
+	* decline message */
+	unsigned long conflict_time; /* how long an arp conflict offender is leased for */
+	unsigned long offer_time; /* how long an offered address is reserved */
+	unsigned long min_lease; /* minimum lease a client can request*/
+	char *lease_file;
+	char *pidfile;
+	char notify_file; / What to run whenever leases are written */
+	u_int32_t siaddr; /* next server bootp option */
+	char sname; / bootp server name */
+	char boot_file; / bootp boot file option */
+	};
+
+	extern struct server_config_t server_config;
+	extern struct dhcpOfferedAddr *leases;
+
+
+	#endif

networking/udhcp/dumpleases.c+112 -0

@@ -0,0 +1,112 @@
+	#include <fcntl.h>
+	#include <string.h>
+	#include <stdlib.h>
+	#include <stdio.h>
+	#include <sys/wait.h>
+	#include <sys/stat.h>
+	#include <arpa/inet.h>
+	#include <netdb.h>
+	#include <netinet/in.h>
+	#include <stdio.h>
+	#include <sys/types.h>
+	#include <sys/socket.h>
+	#include <unistd.h>
+	#include <syslog.h>
+	#include <signal.h>
+	#include <errno.h>
+	#include <getopt.h>
+	#include <time.h>
+
+	#include "libbb_udhcp.h"
+
+	#define REMAINING 0
+	#define ABSOLUTE 1
+
+	struct lease_t {
+	unsigned char chaddr[16];
+	u_int32_t yiaddr;
+	u_int32_t expires;
+	};
+
+	#ifdef BB_VER
+	int dumpleases_main(int argc, char *argv[])
+	#else
+	int main(int argc, char *argv[])
+	#endif
+	{
+	FILE *fp;
+	int i, c, mode = REMAINING;
+	long expires;
+	char file[255] = "/var/lib/misc/udhcpd.leases";
+	struct lease_t lease;
+	struct in_addr addr;
+
+	static struct option options[] = {
+	{"absolute", 0, 0, 'a'},
+	{"remaining", 0, 0, 'r'},
+	{"file", 1, 0, 'f'},
+	{"help", 0, 0, 'h'},
+	{0, 0, 0, 0}
+	};
+
+	while (1) {
+	int option_index = 0;
+	c = getopt_long(argc, argv, "arf:h", options, &option_index);
+	if (c == -1) break;
+
+	switch (c) {
+	case 'a': mode = ABSOLUTE; break;
+	case 'r': mode = REMAINING; break;
+	case 'f':
+	strncpy(file, optarg, 255);
+	file[254] = '\0';
+	break;
+	case 'h':
+	printf("Usage: dumpleases -f <file> -[r\|a]\n\n");
+	printf(" -f, --file=FILENAME Leases file to load\n");
+	printf(" -r, --remaining Interepret lease times as time remaing\n");
+	printf(" -a, --absolute Interepret lease times as expire time\n");
+	break;
+	}
+	}
+
+	if (!(fp = fopen(file, "r"))) {
+	perror("could not open input file");
+	return 0;
+	}
+
+	printf("Mac Address IP-Address Expires %s\n", mode == REMAINING ? "in" : "at");
+	/* "00:00:00:00:00:00 255.255.255.255 Wed Jun 30 21:49:08 1993" */
+	while (fread(&lease, sizeof(lease), 1, fp)) {
+
+	for (i = 0; i < 6; i++) {
+	printf("%02x", lease.chaddr[i]);
+	if (i != 5) printf(":");
+	}
+	addr.s_addr = lease.yiaddr;
+	printf(" %-15s", inet_ntoa(addr));
+	expires = ntohl(lease.expires);
+	printf(" ");
+	if (mode == REMAINING) {
+	if (!expires) printf("expired\n");
+	else {
+	if (expires > 606024) {
+	printf("%ld days, ", expires / (606024));
+	expires %= 606024;
+	}
+	if (expires > 60*60) {
+	printf("%ld hours, ", expires / (60*60));
+	expires %= 60*60;
+	}
+	if (expires > 60) {
+	printf("%ld minutes, ", expires / 60);
+	expires %= 60;
+	}
+	printf("%ld seconds\n", expires);
+	}
+	} else printf("%s", ctime(&expires));
+	}
+	fclose(fp);
+
+	return 0;
+	}

networking/udhcp/files.c+284 -0

@@ -0,0 +1,284 @@
+	/*
+	* files.c -- DHCP server file manipulation *
+	* Rewrite by Russ Dill <[email protected]> July 2001
+	*/
+
+	#include <stdio.h>
+	#include <sys/socket.h>
+	#include <arpa/inet.h>
+	#include <string.h>
+	#include <stdlib.h>
+	#include <time.h>
+	#include <ctype.h>
+	#include <netdb.h>
+
+	#include "debug.h"
+	#include "dhcpd.h"
+	#include "files.h"
+	#include "options.h"
+	#include "leases.h"
+
+	/* on these functions, make sure you datatype matches */
+	static int read_ip(char line, void arg)
+	{
+	struct in_addr *addr = arg;
+	struct hostent *host;
+	int retval = 1;
+
+	if (!inet_aton(line, addr)) {
+	if ((host = gethostbyname(line)))
+	addr->s_addr = ((unsigned long ) host->h_addr_list[0]);
+	else retval = 0;
+	}
+	return retval;
+	}
+
+
+	static int read_str(char line, void arg)
+	{
+	char **dest = arg;
+
+	if (dest) free(dest);
+	*dest = strdup(line);
+
+	return 1;
+	}
+
+
+	static int read_u32(char line, void arg)
+	{
+	u_int32_t *dest = arg;
+	char *endptr;
+	*dest = strtoul(line, &endptr, 0);
+	return endptr[0] == '\0';
+	}
+
+
+	static int read_yn(char line, void arg)
+	{
+	char *dest = arg;
+	int retval = 1;
+
+	if (!strcasecmp("yes", line))
+	*dest = 1;
+	else if (!strcasecmp("no", line))
+	*dest = 0;
+	else retval = 0;
+
+	return retval;
+	}
+
+
+	/* read a dhcp option and add it to opt_list */
+	static int read_opt(char line, void arg)
+	{
+	struct option_set **opt_list = arg;
+	char opt, val, *endptr;
+	struct dhcp_option *option = NULL;
+	int retval = 0, length = 0;
+	char buffer[255];
+	u_int16_t result_u16;
+	u_int32_t result_u32;
+	int i;
+
+	if (!(opt = strtok(line, " \t="))) return 0;
+
+	for (i = 0; options[i].code; i++)
+	if (!strcmp(options[i].name, opt))
+	option = &(options[i]);
+
+	if (!option) return 0;
+
+	do {
+	val = strtok(NULL, ", \t");
+	if (val) {
+	length = option_lengths[option->flags & TYPE_MASK];
+	retval = 0;
+	switch (option->flags & TYPE_MASK) {
+	case OPTION_IP:
+	retval = read_ip(val, buffer);
+	break;
+	case OPTION_IP_PAIR:
+	retval = read_ip(val, buffer);
+	if (!(val = strtok(NULL, ", \t/-"))) retval = 0;
+	if (retval) retval = read_ip(val, buffer + 4);
+	break;
+	case OPTION_STRING:
+	length = strlen(val);
+	if (length > 0) {
+	if (length > 254) length = 254;
+	memcpy(buffer, val, length);
+	retval = 1;
+	}
+	break;
+	case OPTION_BOOLEAN:
+	retval = read_yn(val, buffer);
+	break;
+	case OPTION_U8:
+	buffer[0] = strtoul(val, &endptr, 0);
+	retval = (endptr[0] == '\0');
+	break;
+	case OPTION_U16:
+	result_u16 = htons(strtoul(val, &endptr, 0));
+	memcpy(buffer, &result_u16, 2);
+	retval = (endptr[0] == '\0');
+	break;
+	case OPTION_S16:
+	result_u16 = htons(strtol(val, &endptr, 0));
+	memcpy(buffer, &result_u16, 2);
+	retval = (endptr[0] == '\0');
+	break;
+	case OPTION_U32:
+	result_u32 = htonl(strtoul(val, &endptr, 0));
+	memcpy(buffer, &result_u32, 4);
+	retval = (endptr[0] == '\0');
+	break;
+	case OPTION_S32:
+	result_u32 = htonl(strtol(val, &endptr, 0));
+	memcpy(buffer, &result_u32, 4);
+	retval = (endptr[0] == '\0');
+	break;
+	default:
+	break;
+	}
+	if (retval)
+	attach_option(opt_list, option, buffer, length);
+	};
+	} while (val && retval && option->flags & OPTION_LIST);
+	return retval;
+	}
+
+
+	static struct config_keyword keywords[] = {
+	/* keyword[14] handler variable address default[20] */
+	{"start", read_ip, &(server_config.start), "192.168.0.20"},
+	{"end", read_ip, &(server_config.end), "192.168.0.254"},
+	{"interface", read_str, &(server_config.interface), "eth0"},
+	{"option", read_opt, &(server_config.options), ""},
+	{"opt", read_opt, &(server_config.options), ""},
+	{"max_leases", read_u32, &(server_config.max_leases), "254"},
+	{"remaining", read_yn, &(server_config.remaining), "yes"},
+	{"auto_time", read_u32, &(server_config.auto_time), "7200"},
+	{"decline_time",read_u32, &(server_config.decline_time),"3600"},
+	{"conflict_time",read_u32,&(server_config.conflict_time),"3600"},
+	{"offer_time", read_u32, &(server_config.offer_time), "60"},
+	{"min_lease", read_u32, &(server_config.min_lease), "60"},
+	{"lease_file", read_str, &(server_config.lease_file), "/var/lib/misc/udhcpd.leases"},
+	{"pidfile", read_str, &(server_config.pidfile), "/var/run/udhcpd.pid"},
+	{"notify_file", read_str, &(server_config.notify_file), ""},
+	{"siaddr", read_ip, &(server_config.siaddr), "0.0.0.0"},
+	{"sname", read_str, &(server_config.sname), ""},
+	{"boot_file", read_str, &(server_config.boot_file), ""},
+	/ADDME: static lease /
+	{"", NULL, NULL, ""}
+	};
+
+
+	int read_config(char *file)
+	{
+	FILE *in;
+	char buffer[80], orig[80], token, line;
+	int i;
+
+	for (i = 0; strlen(keywords[i].keyword); i++)
+	if (strlen(keywords[i].def))
+	keywords[i].handler(keywords[i].def, keywords[i].var);
+
+	if (!(in = fopen(file, "r"))) {
+	LOG(LOG_ERR, "unable to open config file: %s", file);
+	return 0;
+	}
+
+	while (fgets(buffer, 80, in)) {
+	if (strchr(buffer, '\n')) *(strchr(buffer, '\n')) = '\0';
+	strncpy(orig, buffer, 80);
+	if (strchr(buffer, '#')) *(strchr(buffer, '#')) = '\0';
+	token = buffer + strspn(buffer, " \t");
+	if (*token == '\0') continue;
+	line = token + strcspn(token, " \t=");
+	if (*line == '\0') continue;
+	*line = '\0';
+	line++;
+
+	/* eat leading whitespace */
+	line = line + strspn(line, " \t=");
+	/* eat trailing whitespace */
+	for (i = strlen(line); i > 0 && isspace(line[i - 1]); i--);
+	line[i] = '\0';
+
+	for (i = 0; strlen(keywords[i].keyword); i++)
+	if (!strcasecmp(token, keywords[i].keyword))
+	if (!keywords[i].handler(line, keywords[i].var)) {
+	LOG(LOG_ERR, "unable to parse '%s'", orig);
+	/* reset back to the default value */
+	keywords[i].handler(keywords[i].def, keywords[i].var);
+	}
+	}
+	fclose(in);
+	return 1;
+	}
+
+
+	void write_leases(void)
+	{
+	FILE *fp;
+	unsigned int i;
+	char buf[255];
+	time_t curr = time(0);
+	unsigned long lease_time;
+
+	if (!(fp = fopen(server_config.lease_file, "w"))) {
+	LOG(LOG_ERR, "Unable to open %s for writing", server_config.lease_file);
+	return;
+	}
+
+	for (i = 0; i < server_config.max_leases; i++) {
+	if (leases[i].yiaddr != 0) {
+	if (server_config.remaining) {
+	if (lease_expired(&(leases[i])))
+	lease_time = 0;
+	else lease_time = leases[i].expires - curr;
+	} else lease_time = leases[i].expires;
+	lease_time = htonl(lease_time);
+	fwrite(leases[i].chaddr, 16, 1, fp);
+	fwrite(&(leases[i].yiaddr), 4, 1, fp);
+	fwrite(&lease_time, 4, 1, fp);
+	}
+	}
+	fclose(fp);
+
+	if (server_config.notify_file) {
+	sprintf(buf, "%s %s", server_config.notify_file, server_config.lease_file);
+	system(buf);
+	}
+	}
+
+
+	void read_leases(char *file)
+	{
+	FILE *fp;
+	unsigned int i = 0;
+	struct dhcpOfferedAddr lease;
+
+	if (!(fp = fopen(file, "r"))) {
+	LOG(LOG_ERR, "Unable to open %s for reading", file);
+	return;
+	}
+
+	while (i < server_config.max_leases && (fread(&lease, sizeof lease, 1, fp) == 1)) {
+	/* ADDME: is it a static lease */
+	if (lease.yiaddr >= server_config.start && lease.yiaddr <= server_config.end) {
+	lease.expires = ntohl(lease.expires);
+	if (!server_config.remaining) lease.expires -= time(0);
+	if (!(add_lease(lease.chaddr, lease.yiaddr, lease.expires))) {
+	LOG(LOG_WARNING, "Too many leases while loading %s\n", file);
+	break;
+	}
+	i++;
+	}
+	}
+	DEBUG(LOG_INFO, "Read %d leases", i);
+	fclose(fp);
+	}
+
+

networking/udhcp/files.h+17 -0

@@ -0,0 +1,17 @@
+	/* files.h */
+	#ifndef _FILES_H
+	#define _FILES_H
+
+	struct config_keyword {
+	char keyword[14];
+	int (handler)(char line, void *var);
+	void *var;
+	char def[30];
+	};
+
+
+	int read_config(char *file);
+	void write_leases(void);
+	void read_leases(char *file);
+
+	#endif

networking/udhcp/frontend.c+16 -0

@@ -0,0 +1,16 @@
+	#include <string.h>
+
+	extern int udhcpd_main(int argc, char *argv[]);
+	extern int udhcpc_main(int argc, char *argv[]);
+
+	int main(int argc, char *argv[])
+	{
+	int ret = 0;
+	char *base = strrchr(argv[0], '/');
+
+	if (strstr(base ? (base + 1) : argv[0], "dhcpd"))
+	ret = udhcpd_main(argc, argv);
+	else ret = udhcpc_main(argc, argv);
+
+	return ret;
+	}

networking/udhcp/leases.c+151 -0

@@ -0,0 +1,151 @@
+	/*
+	* leases.c -- tools to manage DHCP leases
+	* Russ Dill <[email protected]> July 2001
+	*/
+
+	#include <time.h>
+	#include <string.h>
+	#include <sys/socket.h>
+	#include <netinet/in.h>
+	#include <arpa/inet.h>
+
+	#include "debug.h"
+	#include "dhcpd.h"
+	#include "files.h"
+	#include "options.h"
+	#include "leases.h"
+	#include "arpping.h"
+
+	unsigned char blank_chaddr[] = {[0 ... 15] = 0};
+
+	/* clear every lease out that chaddr OR yiaddr matches and is nonzero */
+	void clear_lease(u_int8_t *chaddr, u_int32_t yiaddr)
+	{
+	unsigned int i, j;
+
+	for (j = 0; j < 16 && !chaddr[j]; j++);
+
+	for (i = 0; i < server_config.max_leases; i++)
+	if ((j != 16 && !memcmp(leases[i].chaddr, chaddr, 16)) \|\|
+	(yiaddr && leases[i].yiaddr == yiaddr)) {
+	memset(&(leases[i]), 0, sizeof(struct dhcpOfferedAddr));
+	}
+	}
+
+
+	/* add a lease into the table, clearing out any old ones */
+	struct dhcpOfferedAddr add_lease(u_int8_t chaddr, u_int32_t yiaddr, unsigned long lease)
+	{
+	struct dhcpOfferedAddr *oldest;
+
+	/* clean out any old ones */
+	clear_lease(chaddr, yiaddr);
+
+	oldest = oldest_expired_lease();
+
+	if (oldest) {
+	memcpy(oldest->chaddr, chaddr, 16);
+	oldest->yiaddr = yiaddr;
+	oldest->expires = time(0) + lease;
+	}
+
+	return oldest;
+	}
+
+
+	/* true if a lease has expired */
+	int lease_expired(struct dhcpOfferedAddr *lease)
+	{
+	return (lease->expires < (unsigned long) time(0));
+	}
+
+
+	/* Find the oldest expired lease, NULL if there are no expired leases */
+	struct dhcpOfferedAddr *oldest_expired_lease(void)
+	{
+	struct dhcpOfferedAddr *oldest = NULL;
+	unsigned long oldest_lease = time(0);
+	unsigned int i;
+
+
+	for (i = 0; i < server_config.max_leases; i++)
+	if (oldest_lease > leases[i].expires) {
+	oldest_lease = leases[i].expires;
+	oldest = &(leases[i]);
+	}
+	return oldest;
+
+	}
+
+
+	/* Find the first lease that matches chaddr, NULL if no match */
+	struct dhcpOfferedAddr find_lease_by_chaddr(u_int8_t chaddr)
+	{
+	unsigned int i;
+
+	for (i = 0; i < server_config.max_leases; i++)
+	if (!memcmp(leases[i].chaddr, chaddr, 16)) return &(leases[i]);
+
+	return NULL;
+	}
+
+
+	/* Find the first lease that matches yiaddr, NULL is no match */
+	struct dhcpOfferedAddr *find_lease_by_yiaddr(u_int32_t yiaddr)
+	{
+	unsigned int i;
+
+	for (i = 0; i < server_config.max_leases; i++)
+	if (leases[i].yiaddr == yiaddr) return &(leases[i]);
+
+	return NULL;
+	}
+
+
+	/* find an assignable address, it check_expired is true, we check all the expired leases as well.
+	* Maybe this should try expired leases by age... */
+	u_int32_t find_address(int check_expired)
+	{
+	u_int32_t addr, ret;
+	struct dhcpOfferedAddr *lease = NULL;
+
+	addr = ntohl(server_config.start); /* addr is in host order here */
+	for (;addr <= ntohl(server_config.end); addr++) {
+
+	/* ie, 192.168.55.0 */
+	if (!(addr & 0xFF)) continue;
+
+	/* ie, 192.168.55.255 */
+	if ((addr & 0xFF) == 0xFF) continue;
+
+	/* lease is not taken */
+	ret = htonl(addr);
+	if ((!(lease = find_lease_by_yiaddr(ret)) \|\|
+
+	/* or it expired and we are checking for expired leases */
+	(check_expired && lease_expired(lease))) &&
+
+	/* and it isn't on the network */
+	!check_ip(ret)) {
+	return ret;
+	break;
+	}
+	}
+	return 0;
+	}
+
+
+	/* check is an IP is taken, if it is, add it to the lease table */
+	int check_ip(u_int32_t addr)
+	{
+	struct in_addr temp;
+
+	if (arpping(addr, server_config.server, server_config.arp, server_config.interface) == 0) {
+	temp.s_addr = addr;
+	LOG(LOG_INFO, "%s belongs to someone, reserving it for %ld seconds",
+	inet_ntoa(temp), server_config.conflict_time);
+	add_lease(blank_chaddr, addr, server_config.conflict_time);
+	return 1;
+	} else return 0;
+	}
+

networking/udhcp/leases.h+24 -0

@@ -0,0 +1,24 @@
+	/* leases.h */
+	#ifndef _LEASES_H
+	#define _LEASES_H
+
+
+	struct dhcpOfferedAddr {
+	u_int8_t chaddr[16];
+	u_int32_t yiaddr; /* network order */
+	u_int32_t expires; /* host order */
+	};
+
+	extern unsigned char blank_chaddr[];
+
+	void clear_lease(u_int8_t *chaddr, u_int32_t yiaddr);
+	struct dhcpOfferedAddr add_lease(u_int8_t chaddr, u_int32_t yiaddr, unsigned long lease);
+	int lease_expired(struct dhcpOfferedAddr *lease);
+	struct dhcpOfferedAddr *oldest_expired_lease(void);
+	struct dhcpOfferedAddr find_lease_by_chaddr(u_int8_t chaddr);
+	struct dhcpOfferedAddr *find_lease_by_yiaddr(u_int32_t yiaddr);
+	u_int32_t find_address(int check_expired);
+	int check_ip(u_int32_t addr);
+
+
+	#endif

networking/udhcp/libbb_udhcp.h+29 -0

@@ -0,0 +1,29 @@
+	/* libbb_udhcp.h - busybox compatability wrapper */
+
+	#ifndef _LIBBB_UDHCP_H
+	#define _LIBBB_UDHCP_H
+
+	#ifdef BB_VER
+	#include "libbb.h"
+
+	#ifdef CONFIG_FEATURE_UDHCP_SYSLOG
+	#define SYSLOG
+	#endif
+
+	#ifdef CONFIG_FEATURE_UDHCP_DEBUG
+	#define DEBUG
+	#endif
+
+	#define COMBINED_BINARY
+	#define VERSION "0.9.8-pre"
+
+	#else /* ! BB_VER */
+
+	#define TRUE 1
+	#define FALSE 0
+
+	#define xmalloc malloc
+
+	#endif /* BB_VER */
+
+	#endif /* _LIBBB_UDHCP_H */

networking/udhcp/options.c+230 -0

@@ -0,0 +1,230 @@
+	/*
+	* options.c -- DHCP server option packet tools
+	* Rewrite by Russ Dill <[email protected]> July 2001
+	*/
+
+	#include <stdio.h>
+	#include <stdlib.h>
+	#include <string.h>
+
+	#include "debug.h"
+	#include "dhcpd.h"
+	#include "files.h"
+	#include "options.h"
+	#include "leases.h"
+
+
+	/* supported options are easily added here */
+	struct dhcp_option options[] = {
+	/* name[10] flags code */
+	{"subnet", OPTION_IP \| OPTION_REQ, 0x01},
+	{"timezone", OPTION_S32, 0x02},
+	{"router", OPTION_IP \| OPTION_LIST \| OPTION_REQ, 0x03},
+	{"timesvr", OPTION_IP \| OPTION_LIST, 0x04},
+	{"namesvr", OPTION_IP \| OPTION_LIST, 0x05},
+	{"dns", OPTION_IP \| OPTION_LIST \| OPTION_REQ, 0x06},
+	{"logsvr", OPTION_IP \| OPTION_LIST, 0x07},
+	{"cookiesvr", OPTION_IP \| OPTION_LIST, 0x08},
+	{"lprsvr", OPTION_IP \| OPTION_LIST, 0x09},
+	{"hostname", OPTION_STRING \| OPTION_REQ, 0x0c},
+	{"bootsize", OPTION_U16, 0x0d},
+	{"domain", OPTION_STRING \| OPTION_REQ, 0x0f},
+	{"swapsvr", OPTION_IP, 0x10},
+	{"rootpath", OPTION_STRING, 0x11},
+	{"ipttl", OPTION_U8, 0x17},
+	{"mtu", OPTION_U16, 0x1a},
+	{"broadcast", OPTION_IP \| OPTION_REQ, 0x1c},
+	{"ntpsrv", OPTION_IP \| OPTION_LIST, 0x2a},
+	{"wins", OPTION_IP \| OPTION_LIST, 0x2c},
+	{"requestip", OPTION_IP, 0x32},
+	{"lease", OPTION_U32, 0x33},
+	{"dhcptype", OPTION_U8, 0x35},
+	{"serverid", OPTION_IP, 0x36},
+	{"message", OPTION_STRING, 0x38},
+	{"tftp", OPTION_STRING, 0x42},
+	{"bootfile", OPTION_STRING, 0x43},
+	{"", 0x00, 0x00}
+	};
+
+	/* Lengths of the different option types */
+	int option_lengths[] = {
+	[OPTION_IP] = 4,
+	[OPTION_IP_PAIR] = 8,
+	[OPTION_BOOLEAN] = 1,
+	[OPTION_STRING] = 1,
+	[OPTION_U8] = 1,
+	[OPTION_U16] = 2,
+	[OPTION_S16] = 2,
+	[OPTION_U32] = 4,
+	[OPTION_S32] = 4
+	};
+
+
+	/* get an option with bounds checking (warning, not aligned). */
+	unsigned char get_option(struct dhcpMessage packet, int code)
+	{
+	int i, length;
+	unsigned char *optionptr;
+	int over = 0, done = 0, curr = OPTION_FIELD;
+
+	optionptr = packet->options;
+	i = 0;
+	length = 308;
+	while (!done) {
+	if (i >= length) {
+	LOG(LOG_WARNING, "bogus packet, option fields too long.");
+	return NULL;
+	}
+	if (optionptr[i + OPT_CODE] == code) {
+	if (i + 1 + optionptr[i + OPT_LEN] >= length) {
+	LOG(LOG_WARNING, "bogus packet, option fields too long.");
+	return NULL;
+	}
+	return optionptr + i + 2;
+	}
+	switch (optionptr[i + OPT_CODE]) {
+	case DHCP_PADDING:
+	i++;
+	break;
+	case DHCP_OPTION_OVER:
+	if (i + 1 + optionptr[i + OPT_LEN] >= length) {
+	LOG(LOG_WARNING, "bogus packet, option fields too long.");
+	return NULL;
+	}
+	over = optionptr[i + 3];
+	i += optionptr[OPT_LEN] + 2;
+	break;
+	case DHCP_END:
+	if (curr == OPTION_FIELD && over & FILE_FIELD) {
+	optionptr = packet->file;
+	i = 0;
+	length = 128;
+	curr = FILE_FIELD;
+	} else if (curr == FILE_FIELD && over & SNAME_FIELD) {
+	optionptr = packet->sname;
+	i = 0;
+	length = 64;
+	curr = SNAME_FIELD;
+	} else done = 1;
+	break;
+	default:
+	i += optionptr[OPT_LEN + i] + 2;
+	}
+	}
+	return NULL;
+	}
+
+
+	/* return the position of the 'end' option (no bounds checking) */
+	int end_option(unsigned char *optionptr)
+	{
+	int i = 0;
+
+	while (optionptr[i] != DHCP_END) {
+	if (optionptr[i] == DHCP_PADDING) i++;
+	else i += optionptr[i + OPT_LEN] + 2;
+	}
+	return i;
+	}
+
+
+	/* add an option string to the options (an option string contains an option code,
+	* length, then data) */
+	int add_option_string(unsigned char optionptr, unsigned char string)
+	{
+	int end = end_option(optionptr);
+
+	/* end position + string length + option code/length + end option */
+	if (end + string[OPT_LEN] + 2 + 1 >= 308) {
+	LOG(LOG_ERR, "Option 0x%02x did not fit into the packet!", string[OPT_CODE]);
+	return 0;
+	}
+	DEBUG(LOG_INFO, "adding option 0x%02x", string[OPT_CODE]);
+	memcpy(optionptr + end, string, string[OPT_LEN] + 2);
+	optionptr[end + string[OPT_LEN] + 2] = DHCP_END;
+	return string[OPT_LEN] + 2;
+	}
+
+
+	/* add a one to four byte option to a packet */
+	int add_simple_option(unsigned char *optionptr, unsigned char code, u_int32_t data)
+	{
+	char length = 0;
+	int i;
+	unsigned char option[2 + 4];
+	unsigned char *u8;
+	u_int16_t *u16;
+	u_int32_t *u32;
+	u_int32_t aligned;
+	u8 = (unsigned char *) &aligned;
+	u16 = (u_int16_t *) &aligned;
+	u32 = &aligned;
+
+	for (i = 0; options[i].code; i++)
+	if (options[i].code == code) {
+	length = option_lengths[options[i].flags & TYPE_MASK];
+	}
+
+	if (!length) {
+	DEBUG(LOG_ERR, "Could not add option 0x%02x", code);
+	return 0;
+	}
+
+	option[OPT_CODE] = code;
+	option[OPT_LEN] = length;
+
+	switch (length) {
+	case 1: *u8 = data; break;
+	case 2: *u16 = data; break;
+	case 4: *u32 = data; break;
+	}
+	memcpy(option + 2, &aligned, length);
+	return add_option_string(optionptr, option);
+	}
+
+
+	/* find option 'code' in opt_list */
+	struct option_set find_option(struct option_set opt_list, char code)
+	{
+	while (opt_list && opt_list->data[OPT_CODE] < code)
+	opt_list = opt_list->next;
+
+	if (opt_list && opt_list->data[OPT_CODE] == code) return opt_list;
+	else return NULL;
+	}
+
+
+	/* add an option to the opt_list */
+	void attach_option(struct option_set *opt_list, struct dhcp_option option, char *buffer, int length)
+	{
+	struct option_set existing, new, **curr;
+
+	/* add it to an existing option */
+	if ((existing = find_option(*opt_list, option->code))) {
+	DEBUG(LOG_INFO, "Attaching option %s to existing member of list", option->name);
+	if (option->flags & OPTION_LIST) {
+	if (existing->data[OPT_LEN] + length <= 255) {
+	existing->data = realloc(existing->data,
+	existing->data[OPT_LEN] + length + 2);
+	memcpy(existing->data + existing->data[OPT_LEN] + 2, buffer, length);
+	existing->data[OPT_LEN] += length;
+	} /* else, ignore the data, we could put this in a second option in the future */
+	} /* else, ignore the new data */
+	} else {
+	DEBUG(LOG_INFO, "Attaching option %s to list", option->name);
+
+	/* make a new option */
+	new = malloc(sizeof(struct option_set));
+	new->data = malloc(length + 2);
+	new->data[OPT_CODE] = option->code;
+	new->data[OPT_LEN] = length;
+	memcpy(new->data + 2, buffer, length);
+
+	curr = opt_list;
+	while (curr && (curr)->data[OPT_CODE] < option->code)
+	curr = &(*curr)->next;
+
+	new->next = *curr;
+	*curr = new;
+	}
+	}

networking/udhcp/options.h+40 -0

@@ -0,0 +1,40 @@
+	/* options.h */
+	#ifndef _OPTIONS_H
+	#define _OPTIONS_H
+
+	#include "packet.h"
+
+	#define TYPE_MASK 0x0F
+
+	enum {
+	OPTION_IP=1,
+	OPTION_IP_PAIR,
+	OPTION_STRING,
+	OPTION_BOOLEAN,
+	OPTION_U8,
+	OPTION_U16,
+	OPTION_S16,
+	OPTION_U32,
+	OPTION_S32
+	};
+
+	#define OPTION_REQ 0x10 /* have the client request this option */
+	#define OPTION_LIST 0x20 /* There can be a list of 1 or more of these */
+
+	struct dhcp_option {
+	char name[10];
+	char flags;
+	unsigned char code;
+	};
+
+	extern struct dhcp_option options[];
+	extern int option_lengths[];
+
+	unsigned char get_option(struct dhcpMessage packet, int code);
+	int end_option(unsigned char *optionptr);
+	int add_option_string(unsigned char optionptr, unsigned char string);
+	int add_simple_option(unsigned char *optionptr, unsigned char code, u_int32_t data);
+	struct option_set find_option(struct option_set opt_list, char code);
+	void attach_option(struct option_set *opt_list, struct dhcp_option option, char *buffer, int length);
+
+	#endif

networking/udhcp/packet.c+203 -0

@@ -0,0 +1,203 @@
+	#include <unistd.h>
+	#include <string.h>
+	#include <netinet/in.h>
+	#include <sys/types.h>
+	#include <sys/socket.h>
+	#include <features.h>
+	#if __GLIBC__ >=2 && __GLIBC_MINOR >= 1
+	#include <netpacket/packet.h>
+	#include <net/ethernet.h>
+	#else
+	#include <asm/types.h>
+	#include <linux/if_packet.h>
+	#include <linux/if_ether.h>
+	#endif
+	#include <errno.h>
+
+	#include "packet.h"
+	#include "debug.h"
+	#include "dhcpd.h"
+	#include "options.h"
+
+
+	void init_header(struct dhcpMessage *packet, char type)
+	{
+	memset(packet, 0, sizeof(struct dhcpMessage));
+	switch (type) {
+	case DHCPDISCOVER:
+	case DHCPREQUEST:
+	case DHCPRELEASE:
+	case DHCPINFORM:
+	packet->op = BOOTREQUEST;
+	break;
+	case DHCPOFFER:
+	case DHCPACK:
+	case DHCPNAK:
+	packet->op = BOOTREPLY;
+	}
+	packet->htype = ETH_10MB;
+	packet->hlen = ETH_10MB_LEN;
+	packet->cookie = htonl(DHCP_MAGIC);
+	packet->options[0] = DHCP_END;
+	add_simple_option(packet->options, DHCP_MESSAGE_TYPE, type);
+	}
+
+
+	/* read a packet from socket fd, return -1 on read error, -2 on packet error */
+	int get_packet(struct dhcpMessage *packet, int fd)
+	{
+	int bytes;
+	int i;
+	const char broken_vendors[][8] = {
+	"MSFT 98",
+	""
+	};
+	char unsigned *vendor;
+
+	memset(packet, 0, sizeof(struct dhcpMessage));
+	bytes = read(fd, packet, sizeof(struct dhcpMessage));
+	if (bytes < 0) {
+	DEBUG(LOG_INFO, "couldn't read on listening socket, ignoring");
+	return -1;
+	}
+
+	if (ntohl(packet->cookie) != DHCP_MAGIC) {
+	LOG(LOG_ERR, "received bogus message, ignoring");
+	return -2;
+	}
+	DEBUG(LOG_INFO, "Received a packet");
+
+	if (packet->op == BOOTREQUEST && (vendor = get_option(packet, DHCP_VENDOR))) {
+	for (i = 0; broken_vendors[i][0]; i++) {
+	if (vendor[OPT_LEN - 2] == (unsigned char) strlen(broken_vendors[i]) &&
+	!strncmp(vendor, broken_vendors[i], vendor[OPT_LEN - 2])) {
+	DEBUG(LOG_INFO, "broken client (%s), forcing broadcast",
+	broken_vendors[i]);
+	packet->flags \|= htons(BROADCAST_FLAG);
+	}
+	}
+	}
+
+
+	return bytes;
+	}
+
+
+	u_int16_t checksum(void *addr, int count)
+	{
+	/* Compute Internet Checksum for "count" bytes
+	* beginning at location "addr".
+	*/
+	register int32_t sum = 0;
+	u_int16_t source = (u_int16_t ) addr;
+
+	while (count > 1) {
+	/* This is the inner loop */
+	sum += *source++;
+	count -= 2;
+	}
+
+	/* Add left-over byte, if any */
+	if (count > 0) {
+	/* Make sure that the left-over byte is added correctly both
+	* with little and big endian hosts */
+	u_int16_t tmp = 0;
+	(unsigned char ) (&tmp) = * (unsigned char *) source;
+	sum += tmp;
+	}
+	/* Fold 32-bit sum to 16 bits */
+	while (sum >> 16)
+	sum = (sum & 0xffff) + (sum >> 16);
+
+	return ~sum;
+	}
+
+
+	/* Constuct a ip/udp header for a packet, and specify the source and dest hardware address */
+	int raw_packet(struct dhcpMessage *payload, u_int32_t source_ip, int source_port,
+	u_int32_t dest_ip, int dest_port, unsigned char *dest_arp, int ifindex)
+	{
+	int fd;
+	int result;
+	struct sockaddr_ll dest;
+	struct udp_dhcp_packet packet;
+
+	if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
+	DEBUG(LOG_ERR, "socket call failed: %s", strerror(errno));
+	return -1;
+	}
+
+	memset(&dest, 0, sizeof(dest));
+	memset(&packet, 0, sizeof(packet));
+
+	dest.sll_family = AF_PACKET;
+	dest.sll_protocol = htons(ETH_P_IP);
+	dest.sll_ifindex = ifindex;
+	dest.sll_halen = 6;
+	memcpy(dest.sll_addr, dest_arp, 6);
+	if (bind(fd, (struct sockaddr *)&dest, sizeof(struct sockaddr_ll)) < 0) {
+	DEBUG(LOG_ERR, "bind call failed: %s", strerror(errno));
+	close(fd);
+	return -1;
+	}
+
+	packet.ip.protocol = IPPROTO_UDP;
+	packet.ip.saddr = source_ip;
+	packet.ip.daddr = dest_ip;
+	packet.udp.source = htons(source_port);
+	packet.udp.dest = htons(dest_port);
+	packet.udp.len = htons(sizeof(packet.udp) + sizeof(struct dhcpMessage)); /* cheat on the psuedo-header */
+	packet.ip.tot_len = packet.udp.len;
+	memcpy(&(packet.data), payload, sizeof(struct dhcpMessage));
+	packet.udp.check = checksum(&packet, sizeof(struct udp_dhcp_packet));
+
+	packet.ip.tot_len = htons(sizeof(struct udp_dhcp_packet));
+	packet.ip.ihl = sizeof(packet.ip) >> 2;
+	packet.ip.version = IPVERSION;
+	packet.ip.ttl = IPDEFTTL;
+	packet.ip.check = checksum(&(packet.ip), sizeof(packet.ip));
+
+	result = sendto(fd, &packet, sizeof(struct udp_dhcp_packet), 0, (struct sockaddr *) &dest, sizeof(dest));
+	if (result <= 0) {
+	DEBUG(LOG_ERR, "write on socket failed: %s", strerror(errno));
+	}
+	close(fd);
+	return result;
+	}
+
+
+	/* Let the kernel do all the work for packet generation */
+	int kernel_packet(struct dhcpMessage *payload, u_int32_t source_ip, int source_port,
+	u_int32_t dest_ip, int dest_port)
+	{
+	int n = 1;
+	int fd, result;
+	struct sockaddr_in client;
+
+	if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
+	return -1;
+
+	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &n, sizeof(n)) == -1)
+	return -1;
+
+	memset(&client, 0, sizeof(client));
+	client.sin_family = AF_INET;
+	client.sin_port = htons(source_port);
+	client.sin_addr.s_addr = source_ip;
+
+	if (bind(fd, (struct sockaddr *)&client, sizeof(struct sockaddr)) == -1)
+	return -1;
+
+	memset(&client, 0, sizeof(client));
+	client.sin_family = AF_INET;
+	client.sin_port = htons(dest_port);
+	client.sin_addr.s_addr = dest_ip;
+
+	if (connect(fd, (struct sockaddr *)&client, sizeof(struct sockaddr)) == -1)
+	return -1;
+
+	result = write(fd, payload, sizeof(struct dhcpMessage));
+	close(fd);
+	return result;
+	}
+

networking/udhcp/packet.h+41 -0

@@ -0,0 +1,41 @@
+	#ifndef _PACKET_H
+	#define _PACKET_H
+
+	#include <netinet/udp.h>
+	#include <netinet/ip.h>
+
+	struct dhcpMessage {
+	u_int8_t op;
+	u_int8_t htype;
+	u_int8_t hlen;
+	u_int8_t hops;
+	u_int32_t xid;
+	u_int16_t secs;
+	u_int16_t flags;
+	u_int32_t ciaddr;
+	u_int32_t yiaddr;
+	u_int32_t siaddr;
+	u_int32_t giaddr;
+	u_int8_t chaddr[16];
+	u_int8_t sname[64];
+	u_int8_t file[128];
+	u_int32_t cookie;
+	u_int8_t options[308]; /* 312 - cookie */
+	};
+
+	struct udp_dhcp_packet {
+	struct iphdr ip;
+	struct udphdr udp;
+	struct dhcpMessage data;
+	};
+
+	void init_header(struct dhcpMessage *packet, char type);
+	int get_packet(struct dhcpMessage *packet, int fd);
+	u_int16_t checksum(void *addr, int count);
+	int raw_packet(struct dhcpMessage *payload, u_int32_t source_ip, int source_port,
+	u_int32_t dest_ip, int dest_port, unsigned char *dest_arp, int ifindex);
+	int kernel_packet(struct dhcpMessage *payload, u_int32_t source_ip, int source_port,
+	u_int32_t dest_ip, int dest_port);
+
+
+	#endif

networking/udhcp/pidfile.c+69 -0

@@ -0,0 +1,69 @@
+	/* pidfile.c
+	*
+	* Functions to assist in the writing and removing of pidfiles.
+	*
+	* Russ Dill <[email protected]> Soptember 2001
+	*
+	* This program is free software; you can redistribute it and/or modify
+	* it under the terms of the GNU General Public License as published by
+	* the Free Software Foundation; either version 2 of the License, or
+	* (at your option) any later version.
+	*
+	* This program is distributed in the hope that it will be useful,
+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	* GNU General Public License for more details.
+	*
+	* You should have received a copy of the GNU General Public License
+	* along with this program; if not, write to the Free Software
+	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+	*/
+
+	#include <sys/types.h>
+	#include <sys/stat.h>
+	#include <fcntl.h>
+	#include <unistd.h>
+	#include <errno.h>
+	#include <string.h>
+	#include <stdio.h>
+
+	#include "debug.h"
+
+	int pidfile_acquire(char *pidfile)
+	{
+	int pid_fd;
+	if (pidfile == NULL) return -1;
+
+	pid_fd = open(pidfile, O_CREAT \| O_WRONLY, 0644);
+	if (pid_fd < 0) {
+	LOG(LOG_ERR, "Unable to open pidfile %s: %s\n",
+	pidfile, strerror(errno));
+	} else {
+	lockf(pid_fd, F_LOCK, 0);
+	}
+
+	return pid_fd;
+	}
+
+
+	void pidfile_write_release(int pid_fd)
+	{
+	FILE *out;
+
+	if (pid_fd < 0) return;
+
+	if ((out = fdopen(pid_fd, "w")) != NULL) {
+	fprintf(out, "%d\n", getpid());
+	fclose(out);
+	}
+	lockf(pid_fd, F_UNLCK, 0);
+	close(pid_fd);
+	}
+
+
+	void pidfile_delete(char *pidfile)
+	{
+	if (pidfile) unlink(pidfile);
+	}
+
+

networking/udhcp/pidfile.h+26 -0

@@ -0,0 +1,26 @@
+	/* pidfile.h
+	*
+	* Functions to assist in the writing and removing of pidfiles.
+	*
+	* Russ Dill <[email protected]> Soptember 2001
+	*
+	* This program is free software; you can redistribute it and/or modify
+	* it under the terms of the GNU General Public License as published by
+	* the Free Software Foundation; either version 2 of the License, or
+	* (at your option) any later version.
+	*
+	* This program is distributed in the hope that it will be useful,
+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	* GNU General Public License for more details.
+	*
+	* You should have received a copy of the GNU General Public License
+	* along with this program; if not, write to the Free Software
+	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+	*/
+
+
+	int pidfile_acquire(char *pidfile);
+	void pidfile_write_release(int pid_fd);
+	void pidfile_delete(char *pidfile);
+

networking/udhcp/script.c+228 -0

@@ -0,0 +1,228 @@
+	/* script.c
+	*
+	* Functions to call the DHCP client notification scripts
+	*
+	* Russ Dill <[email protected]> July 2001
+	*
+	* This program is free software; you can redistribute it and/or modify
+	* it under the terms of the GNU General Public License as published by
+	* the Free Software Foundation; either version 2 of the License, or
+	* (at your option) any later version.
+	*
+	* This program is distributed in the hope that it will be useful,
+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	* GNU General Public License for more details.
+	*
+	* You should have received a copy of the GNU General Public License
+	* along with this program; if not, write to the Free Software
+	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+	*/
+
+	#include <string.h>
+	#include <unistd.h>
+	#include <stdio.h>
+	#include <stdlib.h>
+	#include <sys/socket.h>
+	#include <netinet/in.h>
+	#include <arpa/inet.h>
+	#include <sys/types.h>
+	#include <sys/wait.h>
+	#include <errno.h>
+
+	#include "options.h"
+	#include "dhcpd.h"
+	#include "dhcpc.h"
+	#include "packet.h"
+	#include "options.h"
+	#include "debug.h"
+
+	/* get a rough idea of how long an option will be (rounding up...) */
+	static int max_option_length[] = {
+	[OPTION_IP] = sizeof("255.255.255.255 "),
+	[OPTION_IP_PAIR] = sizeof("255.255.255.255 ") * 2,
+	[OPTION_STRING] = 1,
+	[OPTION_BOOLEAN] = sizeof("yes "),
+	[OPTION_U8] = sizeof("255 "),
+	[OPTION_U16] = sizeof("65535 "),
+	[OPTION_S16] = sizeof("-32768 "),
+	[OPTION_U32] = sizeof("4294967295 "),
+	[OPTION_S32] = sizeof("-2147483684 "),
+	};
+
+
+	static int upper_length(int length, struct dhcp_option *option)
+	{
+	return max_option_length[option->flags & TYPE_MASK] *
+	(length / option_lengths[option->flags & TYPE_MASK]);
+	}
+
+
+	static int sprintip(char dest, char pre, unsigned char *ip) {
+	return sprintf(dest, "%s%d.%d.%d.%d ", pre, ip[0], ip[1], ip[2], ip[3]);
+	}
+
+
+	/* Fill dest with the text of option 'option'. */
+	static void fill_options(char dest, unsigned char option, struct dhcp_option *type_p)
+	{
+	int type, optlen;
+	u_int16_t val_u16;
+	int16_t val_s16;
+	u_int32_t val_u32;
+	int32_t val_s32;
+	int len = option[OPT_LEN - 2];
+
+	dest += sprintf(dest, "%s=", type_p->name);
+
+	type = type_p->flags & TYPE_MASK;
+	optlen = option_lengths[type];
+	for(;;) {
+	switch (type) {
+	case OPTION_IP_PAIR:
+	dest += sprintip(dest, "", option);
+	*(dest++) = '/';
+	option += 4;
+	optlen = 4;
+	case OPTION_IP: /* Works regardless of host byte order. */
+	dest += sprintip(dest, "", option);
+	break;
+	case OPTION_BOOLEAN:
+	dest += sprintf(dest, *option ? "yes " : "no ");
+	break;
+	case OPTION_U8:
+	dest += sprintf(dest, "%u ", *option);
+	break;
+	case OPTION_U16:
+	memcpy(&val_u16, option, 2);
+	dest += sprintf(dest, "%u ", ntohs(val_u16));
+	break;
+	case OPTION_S16:
+	memcpy(&val_s16, option, 2);
+	dest += sprintf(dest, "%d ", ntohs(val_s16));
+	break;
+	case OPTION_U32:
+	memcpy(&val_u32, option, 4);
+	dest += sprintf(dest, "%lu ", (unsigned long) ntohl(val_u32));
+	break;
+	case OPTION_S32:
+	memcpy(&val_s32, option, 4);
+	dest += sprintf(dest, "%ld ", (long) ntohl(val_s32));
+	break;
+	case OPTION_STRING:
+	memcpy(dest, option, len);
+	dest[len] = '\0';
+	return; /* Short circuit this case */
+	}
+	option += optlen;
+	len -= optlen;
+	if (len <= 0) break;
+	}
+	}
+
+
+	static char find_env(const char prefix, char *defaultstr)
+	{
+	extern char **environ;
+	char **ptr;
+	const int len = strlen(prefix);
+
+	for (ptr = environ; *ptr != NULL; ptr++) {
+	if (strncmp(prefix, *ptr, len) == 0)
+	return *ptr;
+	}
+	return defaultstr;
+	}
+
+
+	/* put all the paramaters into an environment */
+	static char *fill_envp(struct dhcpMessage packet)
+	{
+	int num_options = 0;
+	int i, j;
+	char **envp;
+	unsigned char *temp;
+	char over = 0;
+
+	if (packet == NULL)
+	num_options = 0;
+	else {
+	for (i = 0; options[i].code; i++)
+	if (get_option(packet, options[i].code))
+	num_options++;
+	if (packet->siaddr) num_options++;
+	if ((temp = get_option(packet, DHCP_OPTION_OVER)))
+	over = *temp;
+	if (!(over & FILE_FIELD) && packet->file[0]) num_options++;
+	if (!(over & SNAME_FIELD) && packet->sname[0]) num_options++;
+	}
+
+	envp = xmalloc((num_options + 5) * sizeof(char *));
+	envp[0] = xmalloc(sizeof("interface=") + strlen(client_config.interface));
+	sprintf(envp[0], "interface=%s", client_config.interface);
+	envp[1] = find_env("PATH", "PATH=/bin:/usr/bin:/sbin:/usr/sbin");
+	envp[2] = find_env("HOME", "HOME=/");
+
+	if (packet == NULL) {
+	envp[3] = NULL;
+	return envp;
+	}
+
+	envp[3] = xmalloc(sizeof("ip=255.255.255.255"));
+	sprintip(envp[3], "ip=", (unsigned char *) &packet->yiaddr);
+	for (i = 0, j = 4; options[i].code; i++) {
+	if ((temp = get_option(packet, options[i].code))) {
+	envp[j] = xmalloc(upper_length(temp[OPT_LEN - 2], &options[i]) + strlen(options[i].name) + 2);
+	fill_options(envp[j], temp, &options[i]);
+	j++;
+	}
+	}
+	if (packet->siaddr) {
+	envp[j] = xmalloc(sizeof("siaddr=255.255.255.255"));
+	sprintip(envp[j++], "siaddr=", (unsigned char *) &packet->siaddr);
+	}
+	if (!(over & FILE_FIELD) && packet->file[0]) {
+	/* watch out for invalid packets */
+	packet->file[sizeof(packet->file) - 1] = '\0';
+	envp[j] = xmalloc(sizeof("boot_file=") + strlen(packet->file));
+	sprintf(envp[j++], "boot_file=%s", packet->file);
+	}
+	if (!(over & SNAME_FIELD) && packet->sname[0]) {
+	/* watch out for invalid packets */
+	packet->sname[sizeof(packet->sname) - 1] = '\0';
+	envp[j] = xmalloc(sizeof("sname=") + strlen(packet->sname));
+	sprintf(envp[j++], "sname=%s", packet->sname);
+	}
+	envp[j] = NULL;
+	return envp;
+	}
+
+
+	/* Call a script with a par file and env vars */
+	void run_script(struct dhcpMessage packet, const char name)
+	{
+	int pid;
+	char **envp;
+
+	if (client_config.script == NULL)
+	return;
+
+	/* call script */
+	pid = fork();
+	if (pid) {
+	waitpid(pid, NULL, 0);
+	return;
+	} else if (pid == 0) {
+	envp = fill_envp(packet);
+
+	/* close fd's? */
+
+	/* exec script */
+	DEBUG(LOG_INFO, "execle'ing %s", client_config.script);
+	execle(client_config.script, client_config.script,
+	name, NULL, envp);
+	LOG(LOG_ERR, "script %s failed: %s",
+	client_config.script, strerror(errno));
+	exit(1);
+	}
+	}

networking/udhcp/script.h+6 -0

@@ -0,0 +1,6 @@
+	#ifndef _SCRIPT_H
+	#define _SCRIPT_H
+
+	void run_script(struct dhcpMessage packet, const char name);
+
+	#endif

networking/udhcp/serverpacket.c+263 -0

@@ -0,0 +1,263 @@
+	/* serverpacket.c
+	*
+	* Constuct and send DHCP server packets
+	*
+	* Russ Dill <[email protected]> July 2001
+	*
+	* This program is free software; you can redistribute it and/or modify
+	* it under the terms of the GNU General Public License as published by
+	* the Free Software Foundation; either version 2 of the License, or
+	* (at your option) any later version.
+	*
+	* This program is distributed in the hope that it will be useful,
+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	* GNU General Public License for more details.
+	*
+	* You should have received a copy of the GNU General Public License
+	* along with this program; if not, write to the Free Software
+	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+	*/
+
+	#include <sys/socket.h>
+	#include <netinet/in.h>
+	#include <arpa/inet.h>
+	#include <string.h>
+	#include <time.h>
+
+	#include "packet.h"
+	#include "debug.h"
+	#include "dhcpd.h"
+	#include "options.h"
+	#include "leases.h"
+
+	/* send a packet to giaddr using the kernel ip stack */
+	static int send_packet_to_relay(struct dhcpMessage *payload)
+	{
+	DEBUG(LOG_INFO, "Forwarding packet to relay");
+
+	return kernel_packet(payload, server_config.server, SERVER_PORT,
+	payload->giaddr, SERVER_PORT);
+	}
+
+
+	/* send a packet to a specific arp address and ip address by creating our own ip packet */
+	static int send_packet_to_client(struct dhcpMessage *payload, int force_broadcast)
+	{
+	unsigned char *chaddr;
+	u_int32_t ciaddr;
+
+	if (force_broadcast) {
+	DEBUG(LOG_INFO, "broadcasting packet to client (NAK)");
+	ciaddr = INADDR_BROADCAST;
+	chaddr = MAC_BCAST_ADDR;
+	} else if (payload->ciaddr) {
+	DEBUG(LOG_INFO, "unicasting packet to client ciaddr");
+	ciaddr = payload->ciaddr;
+	chaddr = payload->chaddr;
+	} else if (ntohs(payload->flags) & BROADCAST_FLAG) {
+	DEBUG(LOG_INFO, "broadcasting packet to client (requested)");
+	ciaddr = INADDR_BROADCAST;
+	chaddr = MAC_BCAST_ADDR;
+	} else {
+	DEBUG(LOG_INFO, "unicasting packet to client yiaddr");
+	ciaddr = payload->yiaddr;
+	chaddr = payload->chaddr;
+	}
+	return raw_packet(payload, server_config.server, SERVER_PORT,
+	ciaddr, CLIENT_PORT, chaddr, server_config.ifindex);
+	}
+
+
+	/* send a dhcp packet, if force broadcast is set, the packet will be broadcast to the client */
+	static int send_packet(struct dhcpMessage *payload, int force_broadcast)
+	{
+	int ret;
+
+	if (payload->giaddr)
+	ret = send_packet_to_relay(payload);
+	else ret = send_packet_to_client(payload, force_broadcast);
+	return ret;
+	}
+
+
+	static void init_packet(struct dhcpMessage packet, struct dhcpMessage oldpacket, char type)
+	{
+	init_header(packet, type);
+	packet->xid = oldpacket->xid;
+	memcpy(packet->chaddr, oldpacket->chaddr, 16);
+	packet->flags = oldpacket->flags;
+	packet->giaddr = oldpacket->giaddr;
+	packet->ciaddr = oldpacket->ciaddr;
+	add_simple_option(packet->options, DHCP_SERVER_ID, server_config.server);
+	}
+
+
+	/* add in the bootp options */
+	static void add_bootp_options(struct dhcpMessage *packet)
+	{
+	packet->siaddr = server_config.siaddr;
+	if (server_config.sname)
+	strncpy(packet->sname, server_config.sname, sizeof(packet->sname) - 1);
+	if (server_config.boot_file)
+	strncpy(packet->file, server_config.boot_file, sizeof(packet->file) - 1);
+	}
+
+
+	/* send a DHCP OFFER to a DHCP DISCOVER */
+	int sendOffer(struct dhcpMessage *oldpacket)
+	{
+	struct dhcpMessage packet;
+	struct dhcpOfferedAddr *lease = NULL;
+	u_int32_t req_align, lease_time_align = server_config.lease;
+	unsigned char req, lease_time;
+	struct option_set *curr;
+	struct in_addr addr;
+
+	init_packet(&packet, oldpacket, DHCPOFFER);
+
+	/* ADDME: if static, short circuit */
+	/* the client is in our lease/offered table */
+	if ((lease = find_lease_by_chaddr(oldpacket->chaddr))) {
+	if (!lease_expired(lease))
+	lease_time_align = lease->expires - time(0);
+	packet.yiaddr = lease->yiaddr;
+
+	/* Or the client has a requested ip */
+	} else if ((req = get_option(oldpacket, DHCP_REQUESTED_IP)) &&
+
+	/* Don't look here (ugly hackish thing to do) */
+	memcpy(&req_align, req, 4) &&
+
+	/* and the ip is in the lease range */
+	ntohl(req_align) >= ntohl(server_config.start) &&
+	ntohl(req_align) <= ntohl(server_config.end) &&
+
+	/* and its not already taken/offered / / ADDME: check that its not a static lease */
+	((!(lease = find_lease_by_yiaddr(req_align)) \|\|
+
+	/* or its taken, but expired / / ADDME: or maybe in here */
+	lease_expired(lease)))) {
+	packet.yiaddr = req_align; /* FIXME: oh my, is there a host using this IP? */
+
+	/* otherwise, find a free IP / /ADDME: is it a static lease? */
+	} else {
+	packet.yiaddr = find_address(0);
+
+	/* try for an expired lease */
+	if (!packet.yiaddr) packet.yiaddr = find_address(1);
+	}
+
+	if(!packet.yiaddr) {
+	LOG(LOG_WARNING, "no IP addresses to give -- OFFER abandoned");
+	return -1;
+	}
+
+	if (!add_lease(packet.chaddr, packet.yiaddr, server_config.offer_time)) {
+	LOG(LOG_WARNING, "lease pool is full -- OFFER abandoned");
+	return -1;
+	}
+
+	if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
+	memcpy(&lease_time_align, lease_time, 4);
+	lease_time_align = ntohl(lease_time_align);
+	if (lease_time_align > server_config.lease)
+	lease_time_align = server_config.lease;
+	}
+
+	/* Make sure we aren't just using the lease time from the previous offer */
+	if (lease_time_align < server_config.min_lease)
+	lease_time_align = server_config.lease;
+	/* ADDME: end of short circuit */
+	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));
+
+	curr = server_config.options;
+	while (curr) {
+	if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
+	add_option_string(packet.options, curr->data);
+	curr = curr->next;
+	}
+
+	add_bootp_options(&packet);
+
+	addr.s_addr = packet.yiaddr;
+	LOG(LOG_INFO, "sending OFFER of %s", inet_ntoa(addr));
+	return send_packet(&packet, 0);
+	}
+
+
+	int sendNAK(struct dhcpMessage *oldpacket)
+	{
+	struct dhcpMessage packet;
+
+	init_packet(&packet, oldpacket, DHCPNAK);
+
+	DEBUG(LOG_INFO, "sending NAK");
+	return send_packet(&packet, 1);
+	}
+
+
+	int sendACK(struct dhcpMessage *oldpacket, u_int32_t yiaddr)
+	{
+	struct dhcpMessage packet;
+	struct option_set *curr;
+	unsigned char *lease_time;
+	u_int32_t lease_time_align = server_config.lease;
+	struct in_addr addr;
+
+	init_packet(&packet, oldpacket, DHCPACK);
+	packet.yiaddr = yiaddr;
+
+	if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
+	memcpy(&lease_time_align, lease_time, 4);
+	lease_time_align = ntohl(lease_time_align);
+	if (lease_time_align > server_config.lease)
+	lease_time_align = server_config.lease;
+	else if (lease_time_align < server_config.min_lease)
+	lease_time_align = server_config.lease;
+	}
+
+	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));
+
+	curr = server_config.options;
+	while (curr) {
+	if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
+	add_option_string(packet.options, curr->data);
+	curr = curr->next;
+	}
+
+	add_bootp_options(&packet);
+
+	addr.s_addr = packet.yiaddr;
+	LOG(LOG_INFO, "sending ACK to %s", inet_ntoa(addr));
+
+	if (send_packet(&packet, 0) < 0)
+	return -1;
+
+	add_lease(packet.chaddr, packet.yiaddr, lease_time_align);
+
+	return 0;
+	}
+
+
+	int send_inform(struct dhcpMessage *oldpacket)
+	{
+	struct dhcpMessage packet;
+	struct option_set *curr;
+
+	init_packet(&packet, oldpacket, DHCPACK);
+
+	curr = server_config.options;
+	while (curr) {
+	if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
+	add_option_string(packet.options, curr->data);
+	curr = curr->next;
+	}
+
+	add_bootp_options(&packet);
+
+	return send_packet(&packet, 0);
+	}
+
+
+

networking/udhcp/serverpacket.h+11 -0

@@ -0,0 +1,11 @@
+	#ifndef _SERVERPACKET_H
+	#define _SERVERPACKET_H
+
+
+	int sendOffer(struct dhcpMessage *oldpacket);
+	int sendNAK(struct dhcpMessage *oldpacket);
+	int sendACK(struct dhcpMessage *oldpacket, u_int32_t yiaddr);
+	int send_inform(struct dhcpMessage *oldpacket);
+
+
+	#endif

networking/udhcp/socket.c+157 -0

@@ -0,0 +1,157 @@
+	/*
+	* socket.c -- DHCP server client/server socket creation
+	*
+	* udhcp client/server
+	* Copyright (C) 1999 Matthew Ramsay <[email protected]>
+	* Chris Trew <[email protected]>
+	*
+	* Rewrite by Russ Dill <[email protected]> July 2001
+	*
+	* This program is free software; you can redistribute it and/or modify
+	* it under the terms of the GNU General Public License as published by
+	* the Free Software Foundation; either version 2 of the License, or
+	* (at your option) any later version.
+	*
+	* This program is distributed in the hope that it will be useful,
+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	* GNU General Public License for more details.
+	*
+	* You should have received a copy of the GNU General Public License
+	* along with this program; if not, write to the Free Software
+	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+	*/
+
+	#include <sys/types.h>
+	#include <sys/socket.h>
+	#include <sys/ioctl.h>
+	#include <netinet/in.h>
+	#include <unistd.h>
+	#include <string.h>
+	#include <arpa/inet.h>
+	#include <net/if.h>
+	#include <errno.h>
+	#include <features.h>
+	#if __GLIBC__ >=2 && __GLIBC_MINOR >= 1
+	#include <netpacket/packet.h>
+	#include <net/ethernet.h>
+	#else
+	#include <asm/types.h>
+	#include <linux/if_packet.h>
+	#include <linux/if_ether.h>
+	#endif
+
+	#include "debug.h"
+
+	int read_interface(char interface, int ifindex, u_int32_t addr, unsigned char arp)
+	{
+	int fd;
+	struct ifreq ifr;
+	struct sockaddr_in *our_ip;
+
+	memset(&ifr, 0, sizeof(struct ifreq));
+	if((fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) >= 0) {
+	ifr.ifr_addr.sa_family = AF_INET;
+	strcpy(ifr.ifr_name, interface);
+
+	if (addr) {
+	if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
+	our_ip = (struct sockaddr_in *) &ifr.ifr_addr;
+	*addr = our_ip->sin_addr.s_addr;
+	DEBUG(LOG_INFO, "%s (our ip) = %s", ifr.ifr_name, inet_ntoa(our_ip->sin_addr));
+	} else {
+	LOG(LOG_ERR, "SIOCGIFADDR failed, is the interface up and configured?: %s",
+	strerror(errno));
+	return -1;
+	}
+	}
+
+	if (ioctl(fd, SIOCGIFINDEX, &ifr) == 0) {
+	DEBUG(LOG_INFO, "adapter index %d", ifr.ifr_ifindex);
+	*ifindex = ifr.ifr_ifindex;
+	} else {
+	LOG(LOG_ERR, "SIOCGIFINDEX failed!: %s", strerror(errno));
+	return -1;
+	}
+	if (ioctl(fd, SIOCGIFHWADDR, &ifr) == 0) {
+	memcpy(arp, ifr.ifr_hwaddr.sa_data, 6);
+	DEBUG(LOG_INFO, "adapter hardware address %02x:%02x:%02x:%02x:%02x:%02x",
+	arp[0], arp[1], arp[2], arp[3], arp[4], arp[5]);
+	} else {
+	LOG(LOG_ERR, "SIOCGIFHWADDR failed!: %s", strerror(errno));
+	return -1;
+	}
+	} else {
+	LOG(LOG_ERR, "socket failed!: %s", strerror(errno));
+	return -1;
+	}
+	close(fd);
+	return 0;
+	}
+
+
+	int listen_socket(unsigned int ip, int port, char *inf)
+	{
+	struct ifreq interface;
+	int fd;
+	struct sockaddr_in addr;
+	int n = 1;
+
+	DEBUG(LOG_INFO, "Opening listen socket on 0x%08x:%d %s\n", ip, port, inf);
+	if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
+	DEBUG(LOG_ERR, "socket call failed: %s", strerror(errno));
+	return -1;
+	}
+
+	memset(&addr, 0, sizeof(addr));
+	addr.sin_family = AF_INET;
+	addr.sin_port = htons(port);
+	addr.sin_addr.s_addr = ip;
+
+	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &n, sizeof(n)) == -1) {
+	close(fd);
+	return -1;
+	}
+	if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, (char *) &n, sizeof(n)) == -1) {
+	close(fd);
+	return -1;
+	}
+
+	strncpy(interface.ifr_ifrn.ifrn_name, inf, IFNAMSIZ);
+	if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,(char *)&interface, sizeof(interface)) < 0) {
+	close(fd);
+	return -1;
+	}
+
+	if (bind(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr)) == -1) {
+	close(fd);
+	return -1;
+	}
+
+	return fd;
+	}
+
+
+	int raw_socket(int ifindex)
+	{
+	int fd;
+	struct sockaddr_ll sock;
+
+	DEBUG(LOG_INFO, "Opening raw socket on ifindex %d\n", ifindex);
+	if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
+	DEBUG(LOG_ERR, "socket call failed: %s", strerror(errno));
+	return -1;
+	}
+
+	sock.sll_family = AF_PACKET;
+	sock.sll_protocol = htons(ETH_P_IP);
+	sock.sll_ifindex = ifindex;
+	if (bind(fd, (struct sockaddr *) &sock, sizeof(sock)) < 0) {
+	DEBUG(LOG_ERR, "bind call failed: %s", strerror(errno));
+	close(fd);
+	return -1;
+	}
+
+	return fd;
+	}
+

networking/udhcp/socket.h+9 -0

@@ -0,0 +1,9 @@
+	/* socket.h */
+	#ifndef _SOCKET_H
+	#define _SOCKET_H
+
+	int read_interface(char interface, int ifindex, u_int32_t addr, unsigned char arp);
+	int listen_socket(unsigned int ip, int port, char *inf);
+	int raw_socket(int ifindex);
+
+	#endif

networking/udhcpc.c+0 -1587

@@ -1,1587 +0,0 @@
-	/* dhcpd.c
-	*
-	* udhcp DHCP client
-	*
-	* Russ Dill <[email protected]> July 2001
-	*
-	* Converted to busybox by Glenn McGrath August 2002
-	*
-	* This program is free software; you can redistribute it and/or modify
-	* it under the terms of the GNU General Public License as published by
-	* the Free Software Foundation; either version 2 of the License, or
-	* (at your option) any later version.
-	*
-	* This program is distributed in the hope that it will be useful,
-	* but WITHOUT ANY WARRANTY; without even the implied warranty of
-	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-	* GNU General Public License for more details.
-	*
-	* You should have received a copy of the GNU General Public License
-	* along with this program; if not, write to the Free Software
-	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-	*/
-
-	#include <stdio.h>
-	#include <sys/time.h>
-	#include <sys/types.h>
-	#include <sys/file.h>
-	#include <unistd.h>
-	#include <getopt.h>
-	#include <stdlib.h>
-	#include <sys/socket.h>
-	#include <netinet/in.h>
-	#include <arpa/inet.h>
-	#include <signal.h>
-	#include <time.h>
-	#include <string.h>
-	#include <sys/ioctl.h>
-	#include <net/if.h>
-	#include <errno.h>
-	#include <netinet/ip.h>
-	#include <netinet/udp.h>
-	#include <sys/types.h>
-	#include <sys/wait.h>
-
-	#if __GLIBC__ >=2 && __GLIBC_MINOR >= 1
-	#include <netpacket/packet.h>
-	#include <net/ethernet.h>
-	#else
-	#include <asm/types.h>
-	#include <linux/if_packet.h>
-	#include <linux/if_ether.h>
-	#endif
-	#include "libbb.h"
-
-	static int state;
-	static unsigned long requested_ip; /* = 0 */
-	static unsigned long server_addr;
-	static unsigned long timeout;
-	static int packet_num; /* = 0 */
-	static int fd_main;
-
-	/* #define DEBUG */
-
-	#define VERSION "0.9.7"
-
-	#define LISTEN_NONE 0
-	#define LISTEN_KERNEL 1
-	#define LISTEN_RAW 2
-	static int listen_mode;
-
-	#define DEFAULT_SCRIPT "/usr/share/udhcpc/default.script"
-
-	#define DHCP_END 0xFF
-	#define TYPE_MASK 0x0F
-	#define BROADCAST_FLAG 0x8000
-
-	#define SERVER_PORT 67
-
-	#define DHCP_MAGIC 0x63825363
-
-	#define BOOTREQUEST 1
-	#define BOOTREPLY 2
-
-	#define ETH_10MB 1
-	#define ETH_10MB_LEN 6
-
-	#define OPTION_FIELD 0
-	#define FILE_FIELD 1
-	#define SNAME_FIELD 2
-
-	#define INIT_SELECTING 0
-	#define REQUESTING 1
-	#define BOUND 2
-	#define RENEWING 3
-	#define REBINDING 4
-	#define INIT_REBOOT 5
-	#define RENEW_REQUESTED 6
-	#define RELEASED 7
-
-	#define CLIENT_PORT 68
-
-	#define DHCPDISCOVER 1
-	#define DHCPOFFER 2
-	#define DHCPREQUEST 3
-	#define DHCPDECLINE 4
-	#define DHCPACK 5
-	#define DHCPNAK 6
-	#define DHCPRELEASE 7
-	#define DHCPINFORM 8
-
-	/* DHCP option codes (partial list) */
-	#define DHCP_PADDING 0x00
-	#define DHCP_SUBNET 0x01
-	#define DHCP_TIME_OFFSET 0x02
-	#define DHCP_ROUTER 0x03
-	#define DHCP_TIME_SERVER 0x04
-	#define DHCP_NAME_SERVER 0x05
-	#define DHCP_DNS_SERVER 0x06
-	#define DHCP_LOG_SERVER 0x07
-	#define DHCP_COOKIE_SERVER 0x08
-	#define DHCP_LPR_SERVER 0x09
-	#define DHCP_HOST_NAME 0x0c
-	#define DHCP_BOOT_SIZE 0x0d
-	#define DHCP_DOMAIN_NAME 0x0f
-	#define DHCP_SWAP_SERVER 0x10
-	#define DHCP_ROOT_PATH 0x11
-	#define DHCP_IP_TTL 0x17
-	#define DHCP_MTU 0x1a
-	#define DHCP_BROADCAST 0x1c
-	#define DHCP_NTP_SERVER 0x2a
-	#define DHCP_WINS_SERVER 0x2c
-	#define DHCP_REQUESTED_IP 0x32
-	#define DHCP_LEASE_TIME 0x33
-	#define DHCP_OPTION_OVER 0x34
-	#define DHCP_MESSAGE_TYPE 0x35
-	#define DHCP_SERVER_ID 0x36
-	#define DHCP_PARAM_REQ 0x37
-	#define DHCP_MESSAGE 0x38
-	#define DHCP_MAX_SIZE 0x39
-	#define DHCP_T1 0x3a
-	#define DHCP_T2 0x3b
-	#define DHCP_VENDOR 0x3c
-	#define DHCP_CLIENT_ID 0x3d
-
-	/* miscellaneous defines */
-	#define MAC_BCAST_ADDR (unsigned char *) "\xff\xff\xff\xff\xff\xff"
-	#define OPT_CODE 0
-	#define OPT_LEN 1
-	#define OPT_DATA 2
-
-	enum {
-	OPTION_IP = 1,
-	OPTION_IP_PAIR,
-	OPTION_STRING,
-	OPTION_BOOLEAN,
-	OPTION_U8,
-	OPTION_U16,
-	OPTION_S16,
-	OPTION_U32,
-	OPTION_S32
-	};
-
-	#define OPTION_REQ 0x10 /* have the client request this option */
-	#define OPTION_LIST 0x20 /* There can be a list of 1 or more of these */
-
-	#ifdef SYSLOG
-	# define LOG(level, str, args...) do { printf(str, ## args); \
-	printf("\n"); \
-	syslog(level, str, ## args); } while(0)
-	# define OPEN_LOG(name) openlog(name, 0, 0)
-	# define CLOSE_LOG() closelog()
-	#else
-	# define LOG_EMERG "EMERGENCY!"
-	# define LOG_ALERT "ALERT!"
-	# define LOG_CRIT "critical!"
-	# define LOG_WARNING "warning"
-	# define LOG_ERR "error"
-	# define LOG_INFO "info"
-	# define LOG_DEBUG "debug"
-	# define LOG(level, str, args...) do { printf("%s, " str "\n", level, ## args); } while(0)
-	# define OPEN_LOG(name)
-	# define CLOSE_LOG()
-	#endif
-
-	#ifdef DEBUG
-	# undef DEBUG
-	# define DEBUG(level, str, args...) LOG(level, str, ## args)
-	# define DEBUGGING
-	#else
-	# define DEBUG(level, str, args...)
-	#endif
-
-	struct dhcpMessage {
-	u_int8_t op;
-	u_int8_t htype;
-	u_int8_t hlen;
-	u_int8_t hops;
-	u_int32_t xid;
-	u_int16_t secs;
-	u_int16_t flags;
-	u_int32_t ciaddr;
-	u_int32_t yiaddr;
-	u_int32_t siaddr;
-	u_int32_t giaddr;
-	u_int8_t chaddr[16];
-	u_int8_t sname[64];
-	u_int8_t file[128];
-	u_int32_t cookie;
-	u_int8_t options[308]; /* 312 - cookie */
-	};
-
-	struct client_config_t {
-	char foreground; /* Do not fork */
-	char quit_after_lease; /* Quit after obtaining lease */
-	char abort_if_no_lease; /* Abort if no lease */
-	char interface; / The name of the interface to use */
-	char pidfile; / Optionally store the process ID */
-	char script; / User script to run at dhcp events */
-	unsigned char clientid; / Optional client id to use */
-	unsigned char hostname; / Optional hostname to use */
-	int ifindex; /* Index number of the interface to use */
-	unsigned char arp[6]; /* Our arp address */
-	};
-
-	struct client_config_t client_config = {
-	/* Default options. */
-	abort_if_no_lease:0,
-	foreground:0,
-	quit_after_lease:0,
-	interface:"eth0",
-	pidfile:NULL,
-	script:DEFAULT_SCRIPT,
-	clientid:NULL,
-	hostname:NULL,
-	ifindex:0,
-	arp:"\0\0\0\0\0\0", /* appease gcc-3.0 */
-	};
-
-	struct dhcp_option {
-	char name[10];
-	char flags;
-	unsigned char code;
-	};
-
-	struct udp_dhcp_packet {
-	struct iphdr ip;
-	struct udphdr udp;
-	struct dhcpMessage data;
-	};
-
-	static const struct dhcp_option options[] = {
-	/* name[10] flags code */
-	{"subnet", OPTION_IP \| OPTION_REQ, 0x01},
-	{"timezone", OPTION_S32, 0x02},
-	{"router", OPTION_IP \| OPTION_LIST \| OPTION_REQ, 0x03},
-	{"timesvr", OPTION_IP \| OPTION_LIST, 0x04},
-	{"namesvr", OPTION_IP \| OPTION_LIST, 0x05},
-	{"dns", OPTION_IP \| OPTION_LIST \| OPTION_REQ, 0x06},
-	{"logsvr", OPTION_IP \| OPTION_LIST, 0x07},
-	{"cookiesvr", OPTION_IP \| OPTION_LIST, 0x08},
-	{"lprsvr", OPTION_IP \| OPTION_LIST, 0x09},
-	{"hostname", OPTION_STRING \| OPTION_REQ, 0x0c},
-	{"bootsize", OPTION_U16, 0x0d},
-	{"domain", OPTION_STRING \| OPTION_REQ, 0x0f},
-	{"swapsvr", OPTION_IP, 0x10},
-	{"rootpath", OPTION_STRING, 0x11},
-	{"ipttl", OPTION_U8, 0x17},
-	{"mtu", OPTION_U16, 0x1a},
-	{"broadcast", OPTION_IP \| OPTION_REQ, 0x1c},
-	{"ntpsrv", OPTION_IP \| OPTION_LIST, 0x2a},
-	{"wins", OPTION_IP \| OPTION_LIST, 0x2c},
-	{"requestip", OPTION_IP, 0x32},
-	{"lease", OPTION_U32, 0x33},
-	{"dhcptype", OPTION_U8, 0x35},
-	{"serverid", OPTION_IP, 0x36},
-	{"message", OPTION_STRING, 0x38},
-	{"tftp", OPTION_STRING, 0x42},
-	{"bootfile", OPTION_STRING, 0x43},
-	{"", 0x00, 0x00}
-	};
-
-	/* Lengths of the different option types */
-	static const unsigned char option_lengths[] = {
-	[OPTION_IP] = 4,
-	[OPTION_IP_PAIR] = 8,
-	[OPTION_BOOLEAN] = 1,
-	[OPTION_STRING] = 1,
-	[OPTION_U8] = 1,
-	[OPTION_U16] = 2,
-	[OPTION_S16] = 2,
-	[OPTION_U32] = 4,
-	[OPTION_S32] = 4
-	};
-
-	/* get a rough idea of how long an option will be (rounding up...) */
-	static const unsigned char max_option_length[] = {
-	[OPTION_IP] = sizeof("255.255.255.255 "),
-	[OPTION_IP_PAIR] = sizeof("255.255.255.255 ") * 2,
-	[OPTION_STRING] = 1,
-	[OPTION_BOOLEAN] = sizeof("yes "),
-	[OPTION_U8] = sizeof("255 "),
-	[OPTION_U16] = sizeof("65535 "),
-	[OPTION_S16] = sizeof("-32768 "),
-	[OPTION_U32] = sizeof("4294967295 "),
-	[OPTION_S32] = sizeof("-2147483684 "),
-	};
-
-	/* return the position of the 'end' option (no bounds checking) */
-	static int end_option(unsigned char *optionptr)
-	{
-	int i = 0;
-
-	while (optionptr[i] != DHCP_END) {
-	if (optionptr[i] == DHCP_PADDING)
-	i++;
-	else
-	i += optionptr[i + OPT_LEN] + 2;
-	}
-	return i;
-	}
-
-	/* add an option string to the options (an option string contains an option code,
-	* length, then data) */
-	static int add_option_string(unsigned char optionptr, unsigned char string)
-	{
-	int end = end_option(optionptr);
-
-	/* end position + string length + option code/length + end option */
-	if (end + string[OPT_LEN] + 2 + 1 >= 308) {
-	LOG(LOG_ERR, "Option 0x%02x did not fit into the packet!",
-	string[OPT_CODE]);
-	return 0;
-	}
-	DEBUG(LOG_INFO, "adding option 0x%02x", string[OPT_CODE]);
-	memcpy(optionptr + end, string, string[OPT_LEN] + 2);
-	optionptr[end + string[OPT_LEN] + 2] = DHCP_END;
-	return string[OPT_LEN] + 2;
-	}
-
-	/* add a one to four byte option to a packet */
-	static int add_simple_option(unsigned char *optionptr, unsigned char code,
-	u_int32_t data)
-	{
-	char length = 0;
-	int i;
-	unsigned char option[2 + 4];
-	unsigned char *u8;
-	u_int16_t *u16;
-	u_int32_t *u32;
-	u_int32_t aligned;
-
-	u8 = (unsigned char *) &aligned;
-	u16 = (u_int16_t *) & aligned;
-	u32 = &aligned;
-
-	for (i = 0; options[i].code; i++)
-	if (options[i].code == code) {
-	length = option_lengths[options[i].flags & TYPE_MASK];
-	}
-
-	if (!length) {
-	DEBUG(LOG_ERR, "Could not add option 0x%02x", code);
-	return 0;
-	}
-
-	option[OPT_CODE] = code;
-	option[OPT_LEN] = length;
-
-	switch (length) {
-	case 1:
-	*u8 = data;
-	break;
-	case 2:
-	*u16 = data;
-	break;
-	case 4:
-	*u32 = data;
-	break;
-	}
-
-	memcpy(option + 2, &aligned, length);
-	return add_option_string(optionptr, option);
-	}
-
-	static u_int16_t checksum(void *addr, int count)
-	{
-	/* Compute Internet Checksum for "count" bytes
-	* beginning at location "addr".
-	*/
-	register int32_t sum = 0;
-	u_int16_t source = (u_int16_t ) addr;
-
-	while (count > 1) {
-	/* This is the inner loop */
-	sum += *source++;
-	count -= 2;
-	}
-
-	/* Add left-over byte, if any */
-	if (count > 0) {
-	sum += (unsigned char ) source;
-	}
-
-	/* Fold 32-bit sum to 16 bits */
-	while (sum >> 16) {
-	sum = (sum & 0xffff) + (sum >> 16);
-	}
-
-	return ~sum;
-	}
-
-	/* Constuct a ip/udp header for a packet, and specify the source and dest hardware address */
-	static int raw_packet(struct dhcpMessage *payload, u_int32_t source_ip,
-	int source_port, u_int32_t dest_ip, int dest_port,
-	unsigned char *dest_arp, int ifindex)
-	{
-	int l_fd;
-	int result;
-	struct sockaddr_ll dest;
-	struct udp_dhcp_packet packet;
-
-	if ((l_fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
-	DEBUG(LOG_ERR, "socket call failed: %s", strerror(errno));
-	return -1;
-	}
-
-	memset(&dest, 0, sizeof(dest));
-	memset(&packet, 0, sizeof(packet));
-
-	dest.sll_family = AF_PACKET;
-	dest.sll_protocol = htons(ETH_P_IP);
-	dest.sll_ifindex = ifindex;
-	dest.sll_halen = 6;
-	memcpy(dest.sll_addr, dest_arp, 6);
-	if (bind(l_fd, (struct sockaddr *) &dest, sizeof(struct sockaddr_ll)) < 0) {
-	DEBUG(LOG_ERR, "bind call failed: %s", strerror(errno));
-	close(l_fd);
-	return -1;
-	}
-
-	packet.ip.protocol = IPPROTO_UDP;
-	packet.ip.saddr = source_ip;
-	packet.ip.daddr = dest_ip;
-	packet.udp.source = htons(source_port);
-	packet.udp.dest = htons(dest_port);
-	packet.udp.len = htons(sizeof(packet.udp) + sizeof(struct dhcpMessage)); /* cheat on the psuedo-header */
-	packet.ip.tot_len = packet.udp.len;
-	memcpy(&(packet.data), payload, sizeof(struct dhcpMessage));
-	packet.udp.check = checksum(&packet, sizeof(struct udp_dhcp_packet));
-
-	packet.ip.tot_len = htons(sizeof(struct udp_dhcp_packet));
-	packet.ip.ihl = sizeof(packet.ip) >> 2;
-	packet.ip.version = IPVERSION;
-	packet.ip.ttl = IPDEFTTL;
-	packet.ip.check = checksum(&(packet.ip), sizeof(packet.ip));
-
-	result =
-	sendto(l_fd, &packet, sizeof(struct udp_dhcp_packet), 0,
-	(struct sockaddr *) &dest, sizeof(dest));
-	if (result <= 0) {
-	DEBUG(LOG_ERR, "write on socket failed: %s", strerror(errno));
-	}
-	close(l_fd);
-	return result;
-	}
-
-	/* Let the kernel do all the work for packet generation */
-	static int kernel_packet(struct dhcpMessage *payload, u_int32_t source_ip,
-	int source_port, u_int32_t dest_ip, int dest_port)
-	{
-	int n = 1;
-	int l_fd, result;
-	struct sockaddr_in client;
-
-	if ((l_fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
-	return -1;
-	}
-
-	if (setsockopt(l_fd, SOL_SOCKET, SO_REUSEADDR, (char *) &n, sizeof(n)) ==
-	-1) {
-	return -1;
-	}
-
-	memset(&client, 0, sizeof(client));
-	client.sin_family = AF_INET;
-	client.sin_port = htons(source_port);
-	client.sin_addr.s_addr = source_ip;
-
-	if (bind(l_fd, (struct sockaddr *) &client, sizeof(struct sockaddr)) ==
-	-1) {
-	return -1;
-	}
-
-	memset(&client, 0, sizeof(client));
-	client.sin_family = AF_INET;
-	client.sin_port = htons(dest_port);
-	client.sin_addr.s_addr = dest_ip;
-
-	if (connect(l_fd, (struct sockaddr *) &client, sizeof(struct sockaddr)) ==
-	-1) {
-	return -1;
-	}
-
-	result = write(l_fd, payload, sizeof(struct dhcpMessage));
-	close(l_fd);
-	return result;
-	}
-
-	/* initialize a packet with the proper defaults */
-	static void init_packet(struct dhcpMessage *packet, char type)
-	{
-	struct vendor {
-	char vendor, length;
-	char str[sizeof("udhcp " VERSION)];
-	}
-	vendor_id = {
-	DHCP_VENDOR, sizeof("udhcp " VERSION) - 1, "udhcp " VERSION};
-
-	memset(packet, 0, sizeof(struct dhcpMessage));
-	switch (type) {
-	case DHCPDISCOVER:
-	case DHCPREQUEST:
-	case DHCPRELEASE:
-	case DHCPINFORM:
-	packet->op = BOOTREQUEST;
-	break;
-	case DHCPOFFER:
-	case DHCPACK:
-	case DHCPNAK:
-	packet->op = BOOTREPLY;
-	}
-	packet->htype = ETH_10MB;
-	packet->hlen = ETH_10MB_LEN;
-	packet->cookie = htonl(DHCP_MAGIC);
-	packet->options[0] = DHCP_END;
-	add_simple_option(packet->options, DHCP_MESSAGE_TYPE, type);
-
-	memcpy(packet->chaddr, client_config.arp, 6);
-	add_option_string(packet->options, client_config.clientid);
-	if (client_config.hostname) {
-	add_option_string(packet->options, client_config.hostname);
-	}
-	add_option_string(packet->options, (unsigned char *) &vendor_id);
-	}
-
-
-	/* Add a paramater request list for stubborn DHCP servers. Pull the data
-	* from the struct in options.c. Don't do bounds checking here because it
-	* goes towards the head of the packet. */
-	static void add_requests(struct dhcpMessage *packet)
-	{
-	int end = end_option(packet->options);
-	int i, len = 0;
-
-	packet->options[end + OPT_CODE] = DHCP_PARAM_REQ;
-	for (i = 0; options[i].code; i++) {
-	if (options[i].flags & OPTION_REQ) {
-	packet->options[end + OPT_DATA + len++] = options[i].code;
-	}
-	}
-	packet->options[end + OPT_LEN] = len;
-	packet->options[end + OPT_DATA + len] = DHCP_END;
-
-	}
-
-	/* Broadcast a DHCP discover packet to the network, with an optionally requested IP */
-	static inline int send_discover(unsigned long xid, unsigned long requested)
-	{
-	struct dhcpMessage packet;
-
-	init_packet(&packet, DHCPDISCOVER);
-	packet.xid = xid;
-	if (requested) {
-	add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
-	}
-	add_requests(&packet);
-	DEBUG(LOG_DEBUG, "Sending discover...");
-	return raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
-	SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
-	}
-
-	/* Broadcasts a DHCP request message */
-	static inline int send_selecting(unsigned long xid, unsigned long server,
-	unsigned long requested)
-	{
-	struct dhcpMessage packet;
-	struct in_addr addr;
-
-	init_packet(&packet, DHCPREQUEST);
-	packet.xid = xid;
-
-	add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
-	add_simple_option(packet.options, DHCP_SERVER_ID, server);
-
-	add_requests(&packet);
-	addr.s_addr = requested;
-	DEBUG(LOG_DEBUG, "Sending select for %s...", inet_ntoa(addr));
-	return raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
-	SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
-	}
-
-
-	/* Unicasts or broadcasts a DHCP renew message */
-	static int send_renew(unsigned long xid, unsigned long server,
-	unsigned long ciaddr)
-	{
-	struct dhcpMessage packet;
-
-	init_packet(&packet, DHCPREQUEST);
-	packet.xid = xid;
-	packet.ciaddr = ciaddr;
-
-	add_requests(&packet);
-	DEBUG(LOG_DEBUG, "Sending renew...");
-	if (server) {
-	return kernel_packet(&packet, ciaddr, CLIENT_PORT, server,
-	SERVER_PORT);
-	}
-	return raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
-	SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
-	}
-
-	/* Create a random xid */
-	static unsigned long random_xid(void)
-	{
-	static int initialized;
-
-	if (!initialized) {
-	srand(time(0));
-	initialized++;
-	}
-	return rand();
-	}
-
-	/* just a little helper */
-	static void change_mode(int new_mode)
-	{
-	DEBUG(LOG_INFO, "entering %s listen mode",
-	new_mode ? (new_mode == 1 ? "kernel" : "raw") : "none");
-	close(fd_main);
-	fd_main = -1;
-	listen_mode = new_mode;
-	}
-
-
-	/* SIGUSR1 handler (renew) */
-	static void renew_requested(int sig)
-	{
-	sig = 0;
-	LOG(LOG_INFO, "Received SIGUSR1");
-	if (state == BOUND \|\| state == RENEWING \|\| state == REBINDING \|\|
-	state == RELEASED) {
-	change_mode(LISTEN_KERNEL);
-	packet_num = 0;
-	state = RENEW_REQUESTED;
-	}
-
-	if (state == RELEASED) {
-	change_mode(LISTEN_RAW);
-	state = INIT_SELECTING;
-	}
-
-	/* Kill any timeouts because the user wants this to hurry along */
-	timeout = 0;
-	}
-
-	/* get an option with bounds checking (warning, not aligned). */
-	static unsigned char get_option(struct dhcpMessage packet, int code)
-	{
-	int i, length;
-	unsigned char *optionptr;
-	int over = 0, done = 0, curr = OPTION_FIELD;
-
-	optionptr = packet->options;
-	i = 0;
-	length = 308;
-	while (!done) {
-	if (i >= length) {
-	LOG(LOG_WARNING, "bogus packet, option fields too long.");
-	return NULL;
-	}
-	if (optionptr[i + OPT_CODE] == code) {
-	if (i + 1 + optionptr[i + OPT_LEN] >= length) {
-	LOG(LOG_WARNING, "bogus packet, option fields too long.");
-	return NULL;
-	}
-	return optionptr + i + 2;
-	}
-	switch (optionptr[i + OPT_CODE]) {
-	case DHCP_PADDING:
-	i++;
-	break;
-	case DHCP_OPTION_OVER:
-	if (i + 1 + optionptr[i + OPT_LEN] >= length) {
-	LOG(LOG_WARNING, "bogus packet, option fields too long.");
-	return NULL;
-	}
-	over = optionptr[i + 3];
-	i += optionptr[OPT_LEN] + 2;
-	break;
-	case DHCP_END:
-	if (curr == OPTION_FIELD && over & FILE_FIELD) {
-	optionptr = packet->file;
-	i = 0;
-	length = 128;
-	curr = FILE_FIELD;
-	} else if (curr == FILE_FIELD && over & SNAME_FIELD) {
-	optionptr = packet->sname;
-	i = 0;
-	length = 64;
-	curr = SNAME_FIELD;
-	} else {
-	done = 1;
-	}
-	break;
-	default:
-	i += optionptr[OPT_LEN + i] + 2;
-	}
-	}
-	return NULL;
-	}
-
-	static int sprintip(char dest, char pre, unsigned char *ip)
-	{
-	return sprintf(dest, "%s%d.%d.%d.%d ", pre, ip[0], ip[1], ip[2], ip[3]);
-	}
-
-
-	/* Fill dest with the text of option 'option'. */
-	static inline void fill_options(char dest, unsigned char option,
-	const struct dhcp_option *type_p)
-	{
-	int type, optlen;
-	u_int16_t val_u16;
-	int16_t val_s16;
-	u_int32_t val_u32;
-	int32_t val_s32;
-	int len = option[OPT_LEN - 2];
-
-	dest += sprintf(dest, "%s=", type_p->name);
-
-	type = type_p->flags & TYPE_MASK;
-	optlen = option_lengths[type];
-	for (;;) {
-	switch (type) {
-	case OPTION_IP_PAIR:
-	dest += sprintip(dest, "", option);
-	*(dest++) = '/';
-	option += 4;
-	optlen = 4;
-	case OPTION_IP: /* Works regardless of host byte order. */
-	dest += sprintip(dest, "", option);
-	break;
-	case OPTION_BOOLEAN:
-	dest += sprintf(dest, *option ? "yes " : "no ");
-	break;
-	case OPTION_U8:
-	dest += sprintf(dest, "%u ", *option);
-	break;
-	case OPTION_U16:
-	memcpy(&val_u16, option, 2);
-	dest += sprintf(dest, "%u ", ntohs(val_u16));
-	break;
-	case OPTION_S16:
-	memcpy(&val_s16, option, 2);
-	dest += sprintf(dest, "%d ", ntohs(val_s16));
-	break;
-	case OPTION_U32:
-	memcpy(&val_u32, option, 4);
-	dest += sprintf(dest, "%lu ", (unsigned long) ntohl(val_u32));
-	break;
-	case OPTION_S32:
-	memcpy(&val_s32, option, 4);
-	dest += sprintf(dest, "%ld ", (long) ntohl(val_s32));
-	break;
-	case OPTION_STRING:
-	memcpy(dest, option, len);
-	dest[len] = '\0';
-	return; /* Short circuit this case */
-	}
-	option += optlen;
-	len -= optlen;
-	if (len <= 0) {
-	break;
-	}
-	}
-	}
-
-	static char find_env(const char prefix, char *defaultstr)
-	{
-	extern char **environ;
-	char **ptr;
-	const int len = strlen(prefix);
-
-	for (ptr = environ; *ptr != NULL; ptr++) {
-	if (strncmp(prefix, *ptr, len) == 0) {
-	return *ptr;
-	}
-	}
-	return defaultstr;
-	}
-
-	/* put all the paramaters into an environment */
-	static char *fill_envp(struct dhcpMessage packet)
-	{
-	/* supported options are easily added here */
-	int num_options = 0;
-	int i, j;
-	char **envp;
-	unsigned char *temp;
-	char over = 0;
-
-	if (packet == NULL) {
-	num_options = 0;
-	} else {
-	for (i = 0; options[i].code; i++) {
-	if (get_option(packet, options[i].code)) {
-	num_options++;
-	}
-	}
-	if (packet->siaddr) {
-	num_options++;
-	}
-	if ((temp = get_option(packet, DHCP_OPTION_OVER))) {
-	over = *temp;
-	}
-	if (!(over & FILE_FIELD) && packet->file[0]) {
-	num_options++;
-	}
-	if (!(over & SNAME_FIELD) && packet->sname[0]) {
-	num_options++;
-	}
-	}
-
-	envp = xmalloc((num_options + 5) * sizeof(char *));
-	envp[0] = xmalloc(sizeof("interface=") + strlen(client_config.interface));
-	sprintf(envp[0], "interface=%s", client_config.interface);
-	envp[1] = find_env("PATH", "PATH=/bin:/usr/bin:/sbin:/usr/sbin");
-	envp[2] = find_env("HOME", "HOME=/");
-
-	if (packet == NULL) {
-	envp[3] = NULL;
-	return envp;
-	}
-
-	envp[3] = xmalloc(sizeof("ip=255.255.255.255"));
-	sprintip(envp[3], "ip=", (unsigned char *) &packet->yiaddr);
-	for (i = 0, j = 4; options[i].code; i++) {
-	if ((temp = get_option(packet, options[i].code))) {
-	envp[j] =
-	xmalloc(max_option_length[(&options[i])->flags & TYPE_MASK] *
-	(temp[OPT_LEN - 2] /
-	option_lengths[(&options[i])->flags & TYPE_MASK]) +
-	strlen((&options[i])->name) + 2);
-	fill_options(envp[j], temp, &options[i]);
-	j++;
-	}
-	}
-	if (packet->siaddr) {
-	envp[j] = xmalloc(sizeof("siaddr=255.255.255.255"));
-	sprintip(envp[j++], "siaddr=", (unsigned char *) &packet->yiaddr);
-	}
-	if (!(over & FILE_FIELD) && packet->file[0]) {
-	/* watch out for invalid packets */
-	packet->file[sizeof(packet->file) - 1] = '\0';
-	envp[j] = xmalloc(sizeof("boot_file=") + strlen(packet->file));
-	sprintf(envp[j++], "boot_file=%s", packet->file);
-	}
-	if (!(over & SNAME_FIELD) && packet->sname[0]) {
-	/* watch out for invalid packets */
-	packet->sname[sizeof(packet->sname) - 1] = '\0';
-	envp[j] = xmalloc(sizeof("sname=") + strlen(packet->sname));
-	sprintf(envp[j++], "sname=%s", packet->sname);
-	}
-	envp[j] = NULL;
-	return envp;
-	}
-
-	/* Call a script with a par file and env vars */
-	static void run_script(struct dhcpMessage packet, const char name)
-	{
-	int pid;
-	char **envp;
-
-	if (client_config.script == NULL) {
-	return;
-	}
-
-	/* call script */
-	pid = fork();
-	if (pid) {
-	waitpid(pid, NULL, 0);
-	return;
-	} else if (pid == 0) {
-	envp = fill_envp(packet);
-
-	/* close fd's? */
-
-	/* exec script */
-	DEBUG(LOG_INFO, "execle'ing %s", client_config.script);
-	execle(client_config.script, client_config.script, name, NULL, envp);
-	LOG(LOG_ERR, "script %s failed: %s",
-	client_config.script, strerror(errno));
-	exit(1);
-	}
-	}
-
-	/* SIGUSR2 handler (release) */
-	static void release_requested(int sig)
-	{
-	sig = 0;
-	LOG(LOG_INFO, "Received SIGUSR2");
-	/* send release packet */
-	if (state == BOUND \|\| state == RENEWING \|\| state == REBINDING) {
-	struct dhcpMessage packet;
-
-	init_packet(&packet, DHCPRELEASE);
-	packet.xid = random_xid();
-	packet.ciaddr = requested_ip;
-
-	add_simple_option(packet.options, DHCP_REQUESTED_IP, requested_ip);
-	add_simple_option(packet.options, DHCP_SERVER_ID, server_addr);
-
-	DEBUG(LOG_DEBUG, "Sending release...");
-	kernel_packet(&packet, requested_ip, CLIENT_PORT, server_addr,
-	SERVER_PORT);
-	run_script(NULL, "deconfig");
-	}
-
-	change_mode(LISTEN_NONE);
-	state = RELEASED;
-	timeout = 0x7fffffff;
-	}
-
-
-	static int pidfile_acquire(char *pidfile)
-	{
-	int pid_fd;
-
-	if (pidfile == NULL) {
-	return -1;
-	}
-	pid_fd = open(pidfile, O_CREAT \| O_WRONLY, 0644);
-	if (pid_fd < 0) {
-	LOG(LOG_ERR, "Unable to open pidfile %s: %s\n",
-	pidfile, strerror(errno));
-	} else {
-	lockf(pid_fd, F_LOCK, 0);
-	}
-
-	return pid_fd;
-	}
-
-
-	static void pidfile_write_release(int pid_fd)
-	{
-	FILE *out;
-
-	if (pid_fd < 0) {
-	return;
-	}
-	if ((out = fdopen(pid_fd, "w")) != NULL) {
-	fprintf(out, "%d\n", getpid());
-	fclose(out);
-	}
-	lockf(pid_fd, F_UNLCK, 0);
-	close(pid_fd);
-	}
-
-	/* Exit and cleanup */
-	static void exit_client(int retval)
-	{
-	unlink(client_config.pidfile);
-	if (client_config.pidfile) {
-	unlink(client_config.pidfile);
-	}
-	CLOSE_LOG();
-	exit(retval);
-	}
-
-
-	/* SIGTERM handler */
-	static void terminate(int sig)
-	{
-	sig = 0;
-	LOG(LOG_INFO, "Received SIGTERM");
-	exit_client(0);
-	}
-
-
-	static inline int read_interface(char interface, int ifindex,
-	u_int32_t * addr, unsigned char *arp)
-	{
-	int l_fd;
-	struct ifreq ifr;
-	struct sockaddr_in *s_in;
-
-	memset(&ifr, 0, sizeof(struct ifreq));
-	if ((l_fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) >= 0) {
-	ifr.ifr_addr.sa_family = AF_INET;
-	strcpy(ifr.ifr_name, interface);
-
-	if (addr) {
-	if (ioctl(l_fd, SIOCGIFADDR, &ifr) == 0) {
-	s_in = (struct sockaddr_in *) &ifr.ifr_addr;
-	*addr = s_in->sin_addr.s_addr;
-	DEBUG(LOG_INFO, "%s (our ip) = %s", ifr.ifr_name,
-	inet_ntoa(s_in->sin_addr));
-	} else {
-	LOG(LOG_ERR, "SIOCGIFADDR failed!: %s", strerror(errno));
-	return -1;
-	}
-	}
-
-	if (ioctl(l_fd, SIOCGIFINDEX, &ifr) == 0) {
-	DEBUG(LOG_INFO, "adapter index %d", ifr.ifr_ifindex);
-	*ifindex = ifr.ifr_ifindex;
-	} else {
-	LOG(LOG_ERR, "SIOCGIFINDEX failed!: %s", strerror(errno));
-	return -1;
-	}
-	if (ioctl(l_fd, SIOCGIFHWADDR, &ifr) == 0) {
-	memcpy(arp, ifr.ifr_hwaddr.sa_data, 6);
-	DEBUG(LOG_INFO,
-	"adapter hardware address %02x:%02x:%02x:%02x:%02x:%02x",
-	arp[0], arp[1], arp[2], arp[3], arp[4], arp[5]);
-	} else {
-	LOG(LOG_ERR, "SIOCGIFHWADDR failed!: %s", strerror(errno));
-	return -1;
-	}
-	} else {
-	LOG(LOG_ERR, "socket failed!: %s", strerror(errno));
-	return -1;
-	}
-	close(l_fd);
-	return 0;
-	}
-
-
-	static inline int listen_socket(unsigned int ip, int port, char *inf)
-	{
-	struct ifreq interface;
-	int l_fd;
-	struct sockaddr_in addr;
-	int n = 1;
-
-	DEBUG(LOG_INFO, "Opening listen socket on 0x%08x:%d %s\n", ip, port, inf);
-	if ((l_fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
-	DEBUG(LOG_ERR, "socket call failed: %s", strerror(errno));
-	return -1;
-	}
-
-	memset(&addr, 0, sizeof(addr));
-	addr.sin_family = AF_INET;
-	addr.sin_port = htons(port);
-	addr.sin_addr.s_addr = ip;
-
-	if (setsockopt(l_fd, SOL_SOCKET, SO_REUSEADDR, (char *) &n, sizeof(n)) ==
-	-1) {
-	close(l_fd);
-	return -1;
-	}
-	if (setsockopt(l_fd, SOL_SOCKET, SO_BROADCAST, (char *) &n, sizeof(n)) ==
-	-1) {
-	close(l_fd);
-	return -1;
-	}
-
-	strncpy(interface.ifr_ifrn.ifrn_name, inf, IFNAMSIZ);
-	if (setsockopt
-	(l_fd, SOL_SOCKET, SO_BINDTODEVICE, (char *) &interface,
-	sizeof(interface)) < 0) {
-	close(l_fd);
-	return -1;
-	}
-
-	if (bind(l_fd, (struct sockaddr *) &addr, sizeof(struct sockaddr)) == -1) {
-	close(l_fd);
-	return -1;
-	}
-
-	return l_fd;
-	}
-
-
-	static int raw_socket(int ifindex)
-	{
-	int l_fd;
-	struct sockaddr_ll sock;
-
-	DEBUG(LOG_INFO, "Opening raw socket on ifindex %d\n", ifindex);
-	if ((l_fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
-	DEBUG(LOG_ERR, "socket call failed: %s", strerror(errno));
-	return -1;
-	}
-
-	sock.sll_family = AF_PACKET;
-	sock.sll_protocol = htons(ETH_P_IP);
-	sock.sll_ifindex = ifindex;
-	if (bind(l_fd, (struct sockaddr *) &sock, sizeof(sock)) < 0) {
-	DEBUG(LOG_ERR, "bind call failed: %s", strerror(errno));
-	close(l_fd);
-	return -1;
-	}
-
-	return l_fd;
-
-	}
-
-	/* read a packet from socket fd, return -1 on read error, -2 on packet error */
-	static int get_packet(struct dhcpMessage *packet, int l_fd)
-	{
-	int bytes;
-	int i;
-	const char broken_vendors[][8] = {
-	"MSFT 98",
-	""
-	};
-	char unsigned *vendor;
-
-	memset(packet, 0, sizeof(struct dhcpMessage));
-	bytes = read(l_fd, packet, sizeof(struct dhcpMessage));
-	if (bytes < 0) {
-	DEBUG(LOG_INFO, "couldn't read on listening socket, ignoring");
-	return -1;
-	}
-
-	if (ntohl(packet->cookie) != DHCP_MAGIC) {
-	LOG(LOG_ERR, "received bogus message, ignoring");
-	return -2;
-	}
-	DEBUG(LOG_INFO, "Received a packet");
-
-	if (packet->op == BOOTREQUEST
-	&& (vendor = get_option(packet, DHCP_VENDOR))) {
-	for (i = 0; broken_vendors[i][0]; i++) {
-	if (vendor[OPT_LEN - 2] ==
-	(unsigned char) strlen(broken_vendors[i])
-	&& !strncmp(vendor, broken_vendors[i], vendor[OPT_LEN - 2])) {
-	DEBUG(LOG_INFO, "broken client (%s), forcing broadcast",
-	broken_vendors[i]);
-	packet->flags \|= htons(BROADCAST_FLAG);
-	}
-	}
-	}
-
-	return bytes;
-	}
-
-	static inline int get_raw_packet(struct dhcpMessage *payload, int l_fd)
-	{
-	int bytes;
-	struct udp_dhcp_packet packet;
-	u_int32_t source, dest;
-	u_int16_t check;
-
-	memset(&packet, 0, sizeof(struct udp_dhcp_packet));
-	bytes = read(l_fd, &packet, sizeof(struct udp_dhcp_packet));
-	if (bytes < 0) {
-	DEBUG(LOG_INFO, "couldn't read on raw listening socket -- ignoring");
-	usleep(500000); /* possible down interface, looping condition */
-	return -1;
-	}
-
-	if (bytes < (int) (sizeof(struct iphdr) + sizeof(struct udphdr))) {
-	DEBUG(LOG_INFO, "message too short, ignoring");
-	return -1;
-	}
-
-	if (bytes < ntohs(packet.ip.tot_len)) {
-	DEBUG(LOG_INFO, "Truncated packet");
-	return -1;
-	}
-
-	/* ignore any extra garbage bytes */
-	bytes = ntohs(packet.ip.tot_len);
-
-	/* Make sure its the right packet for us, and that it passes sanity checks */
-	if (packet.ip.protocol != IPPROTO_UDP \|\| packet.ip.version != IPVERSION \|\|
-	packet.ip.ihl != sizeof(packet.ip) >> 2
-	\|\| packet.udp.dest != htons(CLIENT_PORT)
-	\|\| bytes > (int) sizeof(struct udp_dhcp_packet)
-	\|\| ntohs(packet.udp.len) != (short) (bytes - sizeof(packet.ip))) {
-	DEBUG(LOG_INFO, "unrelated/bogus packet");
-	return -1;
-	}
-
-	/* check IP checksum */
-	check = packet.ip.check;
-	packet.ip.check = 0;
-	if (check != checksum(&(packet.ip), sizeof(packet.ip))) {
-	DEBUG(LOG_INFO, "bad IP header checksum, ignoring");
-	return -1;
-	}
-
-	/* verify the UDP checksum by replacing the header with a psuedo header */
-	source = packet.ip.saddr;
-	dest = packet.ip.daddr;
-	check = packet.udp.check;
-	packet.udp.check = 0;
-	memset(&packet.ip, 0, sizeof(packet.ip));
-
-	packet.ip.protocol = IPPROTO_UDP;
-	packet.ip.saddr = source;
-	packet.ip.daddr = dest;
-	packet.ip.tot_len = packet.udp.len; /* cheat on the psuedo-header */
-	if (check && check != checksum(&packet, bytes)) {
-	DEBUG(LOG_ERR, "packet with bad UDP checksum received, ignoring");
-	return -1;
-	}
-
-	memcpy(payload, &(packet.data),
-	bytes - (sizeof(packet.ip) + sizeof(packet.udp)));
-
-	if (ntohl(payload->cookie) != DHCP_MAGIC) {
-	LOG(LOG_ERR, "received bogus message (bad magic) -- ignoring");
-	return -1;
-	}
-	DEBUG(LOG_INFO, "oooooh!!! got some!");
-	return bytes - (sizeof(packet.ip) + sizeof(packet.udp));
-	}
-
-
-	int udhcpc_main(int argc, char *argv[])
-	{
-	unsigned char temp, message;
-	unsigned long t1 = 0, t2 = 0, xid = 0;
-	unsigned long start = 0, lease;
-	fd_set rfds;
-	int retval;
-	struct timeval tv;
-	int c, len;
-	struct dhcpMessage packet;
-	struct in_addr temp_addr;
-	int pid_fd;
-	time_t now;
-
-	static struct option l_options[] = {
-	{"clientid", required_argument, 0, 'c'},
-	{"foreground", no_argument, 0, 'f'},
-	{"hostname", required_argument, 0, 'H'},
-	{"help", no_argument, 0, 'h'},
-	{"interface", required_argument, 0, 'i'},
-	{"now", no_argument, 0, 'n'},
-	{"pidfile", required_argument, 0, 'p'},
-	{"quit", no_argument, 0, 'q'},
-	{"request", required_argument, 0, 'r'},
-	{"script", required_argument, 0, 's'},
-	{"version", no_argument, 0, 'v'},
-	{0, 0, 0, 0}
-	};
-
-	/* get options */
-	while (1) {
-	int option_index = 0;
-
-	c = getopt_long(argc, argv, "c:fH:i:np:qr:s:v", l_options,
-	&option_index);
-	if (c == -1) {
-	break;
-	}
-
-	switch (c) {
-	case 'c':
-	len = strlen(optarg);
-	if (len > 255) {
-	len = 255;
-	}
-	if (client_config.clientid) {
-	free(client_config.clientid);
-	}
-	client_config.clientid = xmalloc(len + 2);
-	client_config.clientid[OPT_CODE] = DHCP_CLIENT_ID;
-	client_config.clientid[OPT_LEN] = len;
-	client_config.clientid[OPT_DATA] = '\0';
-	strncpy(client_config.clientid + 3, optarg, len - 1);
-	break;
-	case 'f':
-	client_config.foreground = 1;
-	break;
-	case 'H':
-	len = strlen(optarg);
-	if (len > 255) {
-	len = 255;
-	}
-	if (client_config.hostname) {
-	free(client_config.hostname);
-	}
-	client_config.hostname = xmalloc(len + 2);
-	client_config.hostname[OPT_CODE] = DHCP_HOST_NAME;
-	client_config.hostname[OPT_LEN] = len;
-	strncpy(client_config.hostname + 2, optarg, len);
-	break;
-	case 'i':
-	client_config.interface = optarg;
-	break;
-	case 'n':
-	client_config.abort_if_no_lease = 1;
-	break;
-	case 'p':
-	client_config.pidfile = optarg;
-	break;
-	case 'q':
-	client_config.quit_after_lease = 1;
-	break;
-	case 'r':
-	requested_ip = inet_addr(optarg);
-	break;
-	case 's':
-	client_config.script = optarg;
-	break;
-	case 'v':
-	printf("udhcpcd, version %s\n\n", VERSION);
-	exit_client(0);
-	break;
-	default:
-	show_usage();
-	}
-	}
-
-	OPEN_LOG("udhcpc");
-	LOG(LOG_INFO, "udhcp client (v%s) started", VERSION);
-
-	pid_fd = pidfile_acquire(client_config.pidfile);
-	pidfile_write_release(pid_fd);
-
-	if (read_interface
-	(client_config.interface, &client_config.ifindex, NULL,
-	client_config.arp) < 0) {
-	exit_client(1);
-	}
-
-	if (!client_config.clientid) {
-	client_config.clientid = xmalloc(6 + 3);
-	client_config.clientid[OPT_CODE] = DHCP_CLIENT_ID;
-	client_config.clientid[OPT_LEN] = 7;
-	client_config.clientid[OPT_DATA] = 1;
-	memcpy(client_config.clientid + 3, client_config.arp, 6);
-	}
-
-	/* setup signal handlers */
-	signal(SIGUSR1, renew_requested);
-	signal(SIGUSR2, release_requested);
-	signal(SIGTERM, terminate);
-
-	state = INIT_SELECTING;
-	run_script(NULL, "deconfig");
-	change_mode(LISTEN_RAW);
-
-	for (;;) {
-	tv.tv_sec = timeout - time(0);
-	tv.tv_usec = 0;
-	FD_ZERO(&rfds);
-
-	if (listen_mode != LISTEN_NONE && fd_main < 0) {
-	if (listen_mode == LISTEN_KERNEL) {
-	fd_main =
-	listen_socket(INADDR_ANY, CLIENT_PORT,
-	client_config.interface);
-	} else {
-	fd_main = raw_socket(client_config.ifindex);
-	}
-	if (fd_main < 0) {
-	LOG(LOG_ERR, "FATAL: couldn't listen on socket, %s",
-	strerror(errno));
-	exit_client(0);
-	}
-	}
-	if (fd_main >= 0) {
-	FD_SET(fd_main, &rfds);
-	}
-
-	if (tv.tv_sec > 0) {
-	DEBUG(LOG_INFO, "Waiting on select...\n");
-	retval = select(fd_main + 1, &rfds, NULL, NULL, &tv);
-	} else {
-	retval = 0; /* If we already timed out, fall through */
-	}
-
-	now = time(0);
-	if (retval == 0) {
-	/* timeout dropped to zero */
-	switch (state) {
-	case INIT_SELECTING:
-	if (packet_num < 3) {
-	if (packet_num == 0) {
-	xid = random_xid();
-	}
-	/* send discover packet */
-	send_discover(xid, requested_ip); /* broadcast */
-
-	timeout = now + ((packet_num == 2) ? 10 : 2);
-	packet_num++;
-	} else {
-	if (client_config.abort_if_no_lease) {
-	LOG(LOG_INFO, "No lease, failing.");
-	exit_client(1);
-	}
-	/* wait to try again */
-	packet_num = 0;
-	timeout = now + 60;
-	}
-	break;
-	case RENEW_REQUESTED:
-	case REQUESTING:
-	if (packet_num < 3) {
-	/* send request packet */
-	if (state == RENEW_REQUESTED) {
-	send_renew(xid, server_addr, requested_ip); /* unicast */
-	} else {
-	send_selecting(xid, server_addr, requested_ip); /* broadcast */
-	}
-	timeout = now + ((packet_num == 2) ? 10 : 2);
-	packet_num++;
-	} else {
-	/* timed out, go back to init state */
-	state = INIT_SELECTING;
-	timeout = now;
-	packet_num = 0;
-	change_mode(LISTEN_RAW);
-	}
-	break;
-	case BOUND:
-	/* Lease is starting to run out, time to enter renewing state */
-	state = RENEWING;
-	change_mode(LISTEN_KERNEL);
-	DEBUG(LOG_INFO, "Entering renew state");
-	/* fall right through */
-	case RENEWING:
-	/* Either set a new T1, or enter REBINDING state */
-	if ((t2 - t1) <= (lease / 14400 + 1)) {
-	/* timed out, enter rebinding state */
-	state = REBINDING;
-	timeout = now + (t2 - t1);
-	DEBUG(LOG_INFO, "Entering rebinding state");
-	} else {
-	/* send a request packet */
-	send_renew(xid, server_addr, requested_ip); /* unicast */
-
-	t1 = (t2 - t1) / 2 + t1;
-	timeout = t1 + start;
-	}
-	break;
-	case REBINDING:
-	/* Either set a new T2, or enter INIT state */
-	if ((lease - t2) <= (lease / 14400 + 1)) {
-	/* timed out, enter init state */
-	state = INIT_SELECTING;
-	LOG(LOG_INFO, "Lease lost, entering init state");
-	run_script(NULL, "deconfig");
-	timeout = now;
-	packet_num = 0;
-	change_mode(LISTEN_RAW);
-	} else {
-	/* send a request packet */
-	send_renew(xid, 0, requested_ip); /* broadcast */
-
-	t2 = (lease - t2) / 2 + t2;
-	timeout = t2 + start;
-	}
-	break;
-	case RELEASED:
-	/* yah, I know, you say it would never happen */
-	timeout = 0x7fffffff;
-	break;
-	}
-	} else if (retval > 0 && listen_mode != LISTEN_NONE
-	&& FD_ISSET(fd_main, &rfds)) {
-	/* a packet is ready, read it */
-
-	if (listen_mode == LISTEN_KERNEL) {
-	len = get_packet(&packet, fd_main);
-	} else {
-	len = get_raw_packet(&packet, fd_main);
-	}
-	if (len == -1 && errno != EINTR) {
-	DEBUG(LOG_INFO, "error on read, %s, reopening socket",
-	strerror(errno));
-	change_mode(listen_mode); /* just close and reopen */
-	}
-	if (len < 0) {
-	continue;
-	}
-
-	if (packet.xid != xid) {
-	DEBUG(LOG_INFO, "Ignoring XID %lx (our xid is %lx)",
-	(unsigned long) packet.xid, xid);
-	continue;
-	}
-
-	if ((message = get_option(&packet, DHCP_MESSAGE_TYPE)) == NULL) {
-	DEBUG(LOG_ERR, "couldnt get option from packet -- ignoring");
-	continue;
-	}
-
-	switch (state) {
-	case INIT_SELECTING:
-	/* Must be a DHCPOFFER to one of our xid's */
-	if (*message == DHCPOFFER) {
-	if ((temp = get_option(&packet, DHCP_SERVER_ID))) {
-	memcpy(&server_addr, temp, 4);
-	xid = packet.xid;
-	requested_ip = packet.yiaddr;
-
-	/* enter requesting state */
-	state = REQUESTING;
-	timeout = now;
-	packet_num = 0;
-	} else {
-	DEBUG(LOG_ERR, "No server ID in message");
-	}
-	}
-	break;
-	case RENEW_REQUESTED:
-	case REQUESTING:
-	case RENEWING:
-	case REBINDING:
-	if (*message == DHCPACK) {
-	if (!(temp = get_option(&packet, DHCP_LEASE_TIME))) {
-	LOG(LOG_ERR,
-	"No lease time with ACK, using 1 hour lease");
-	lease = 60 * 60;
-	} else {
-	memcpy(&lease, temp, 4);
-	lease = ntohl(lease);
-	}
-
-	/* enter bound state */
-	t1 = lease / 2;
-
-	/* little fixed point for n * .875 */
-	t2 = (lease * 0x7) >> 3;
-	temp_addr.s_addr = packet.yiaddr;
-	LOG(LOG_INFO, "Lease of %s obtained, lease time %ld",
-	inet_ntoa(temp_addr), lease);
-	start = now;
-	timeout = t1 + start;
-	requested_ip = packet.yiaddr;
-	run_script(&packet,
-	((state == RENEWING
-	\|\| state == REBINDING) ? "renew" : "bound"));
-
-	state = BOUND;
-	change_mode(LISTEN_NONE);
-	{
-	int pid_fd2;
-
-	if (client_config.quit_after_lease) {
-	exit_client(0);
-	} else if (!client_config.foreground) {
-	pid_fd2 = pidfile_acquire(client_config.pidfile); /* hold lock during fork. */
-	if (daemon(0, 0) == -1) {
-	perror("fork");
-	exit_client(1);
-	}
-	client_config.foreground = 1; /* Do not fork again. */
-	pidfile_write_release(pid_fd2);
-	}
-	}
-	} else if (*message == DHCPNAK) {
-	/* return to init state */
-	LOG(LOG_INFO, "Received DHCP NAK");
-	run_script(&packet, "nak");
-	if (state != REQUESTING) {
-	run_script(NULL, "deconfig");
-	}
-	state = INIT_SELECTING;
-	timeout = now;
-	requested_ip = 0;
-	packet_num = 0;
-	change_mode(LISTEN_RAW);
-	sleep(3); /* avoid excessive network traffic */
-	}
-	break;
-	/* case BOUND, RELEASED: - ignore all packets */
-	}
-	} else if (retval == -1 && errno == EINTR) {
-	/* a signal was caught */
-
-	} else {
-	/* An error occured */
-	DEBUG(LOG_ERR, "Error on select");
-	}
-
-	}
-	return 0;
-	}