add back in udhcp support

61 files changed, 5812 insertions, 0 deletions

diff --git a/networking/udhcp/AUTHORS b/networking/udhcp/AUTHORS
new file mode 100644
index 000000000..f3f43364a
--- /dev/null
+++ b/networking/udhcp/AUTHORS
@@ -0,0 +1,13 @@
+udhcp server/client package
+-----------------------
+
+Russ Dill <Russ.Dill@asu.edu>
+Matthew Ramsay	<matthewr@moreton.com.au>
+Chris Trew <christ@moreton.com.au>
+
+Other Credits:
+--------------
+Moreton Bay	(http://www.moretonbay.com/)
+Vladimir Oleynik <dzo@simtrea.ru> Size optimizations
+
+
diff --git a/networking/udhcp/COPYING b/networking/udhcp/COPYING
new file mode 100644
index 000000000..a43ea2126
--- /dev/null
+++ b/networking/udhcp/COPYING
@@ -0,0 +1,339 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
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diff --git a/networking/udhcp/ChangeLog b/networking/udhcp/ChangeLog
new file mode 100644
index 000000000..bf2982f4b
--- /dev/null
+++ b/networking/udhcp/ChangeLog
@@ -0,0 +1,260 @@
+0.9.9 (pending)
++ Various other size optimizations (Vladimir)
++ Change strerror(errno) to %m (Vladimir N. Oleynik <dzo@simtreas.ru>)
++ Fixed a little endian problem in mton (Bastian Blank <waldi@debian.org>)
++ Fixed a arpping alignment problem (Rui He <rhe@3eti.com>)
++ Added sanity check for max_leases (udhcp bug #1285) (me)
++ Finally got rid of the trailing space in enviromental vars (me)
++ added an new enviromental variable: $mask. It contains the number
+  of subnet bits for tools like ip route that require it.
+  (Bastian Blank <waldi@debian.org>, me)
+
+0.9.8 (021031)
++ split up README files (me)
++ use /dev/urandom to seed xid's (instead of time(0)) (me)
++ fixed renew behavior (me)
++ udhcp now fits nicely into busybox
+  (Glenn McGrath <bug1@iinet.net.au> 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 <keith@ksmith.com>)
++ Was improperly reporting yiaddr as siaddr (ben-udhcp@bdlow.net)
+  udhcp bug#1256
++ Fixed reading of client id (David Poole <davep@portsmith.com>)
++ change sys_errlist[] to strerror() as it aparently doesn't exist
+  (Erik Andersen <andersee@codepoet.org>)
++ fixed get_raw_packet so it returns -2 on non fatal errors
+  (Ted Lemon <Ted.Lemon@nominum.com>)
++ Improved (hopefully) NAKing behavior (me)
++ Added -b option (Jouni Malinen)
++ Compute checksums correctly on big endian hosts
+  (Jouni Malinen <jkmaline@cc.hut.fi>)
+
+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 <Steven.CTR.Carr@tc.faa.gov>)
++ 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 <kraai@alumni.carnegiemellon.edu>)
+
+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 <adam@yggdrasil.com>)
++ 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
+
diff --git a/networking/udhcp/Config.in b/networking/udhcp/Config.in
new file mode 100644
index 000000000..fc07a9b7f
--- /dev/null
+++ b/networking/udhcp/Config.in
@@ -0,0 +1,62 @@
+#
+# For a description of the syntax of this configuration file,
+# see scripts/kbuild/config-language.txt.
+#
+
+menu "udhcp Server/Client"
+
+config CONFIG_UDHCPD
+	bool "udhcp Server (udhcpd)"
+	default n
+	help
+	  uDHCPd is a DHCP server geared primarily toward embedded systems,
+	  while striving to be fully functional and RFC compliant.
+
+	  See http://udhcp.busybox.net for further details.
+
+config CONFIG_UDHCPC
+	bool "udhcp Client (udhcpc)"
+	default n
+	help
+	  uDHCPc is a DHCP client geared primarily toward embedded systems,
+	  while striving to be fully functional and RFC compliant.
+
+	  The udhcp client negotiates a lease with the DHCP server and
+	  notifies a set of scripts when a lease is obtained or lost.
+
+	  See http://udhcp.busybox.net for further details.
+
+config CONFIG_DUMPLEASES
+	bool "Lease display utility (dumpleases)"
+	default n
+	depends on CONFIG_UDHCPD
+	help
+	  dumpleases displays the leases written out by the udhcpd server.
+	  Lease times are stored in the file by time remaining in lease, or
+	  by the absolute time that it expires in seconds from epoch.
+
+	  See http://udhcp.busybox.net for further details.
+
+config CONFIG_FEATURE_UDHCP_SYSLOG
+	bool "  Log udhcp messages to syslog (instead of stdout)"
+	default n
+	depends on CONFIG_UDHCPD || CONFIG_UDHCPC
+	help
+	  If selected, udhcpd will log all its messages to syslog, otherwise,
+	  it will attempt to log them to stdout.
+
+	  See http://udhcp.busybox.net for further details.
+
+config CONFIG_FEATURE_UDHCP_DEBUG
+	bool "  Compile udhcp with noisy debugging messages"
+	default n
+	depends on CONFIG_UDHCPD || CONFIG_UDHCPC
+	help
+	  If selected, udhcpd will output extra debugging output.  If using
+	  this option, compile uDHCP with "-g", and do not fork the daemon to
+	  the background.
+
+	  See http://udhcp.busybox.net for further details.
+
+endmenu
+
diff --git a/networking/udhcp/Makefile b/networking/udhcp/Makefile
new file mode 100644
index 000000000..469ac3dc1
--- /dev/null
+++ b/networking/udhcp/Makefile
@@ -0,0 +1,5 @@
+ifneq ($(wildcard ../../networking/Config.in),)
+include Makefile.busybox
+else
+include Makefile.udhcp
+endif
diff --git a/networking/udhcp/Makefile.busybox b/networking/udhcp/Makefile.busybox
new file mode 100644
index 000000000..7c027edc0
--- /dev/null
+++ b/networking/udhcp/Makefile.busybox
@@ -0,0 +1,36 @@
+# Makefile for busybox
+#
+# Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+#
+# 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
+#
+
+ifndef top_srcdir
+top_srcdir=../..
+endif
+ifndef top_builddir
+top_builddir=../..
+endif
+srcdir=$(top_srcdir)/networking/udhcp
+UDHCP_DIR:=./
+include $(top_builddir)/Rules.mak
+include $(top_builddir)/.config
+include Makefile.in
+all: $(libraries-y)
+-include $(top_builddir)/.depend
+
+clean:
+	rm -f *.o *.a $(AR_TARGET)
+
diff --git a/networking/udhcp/Makefile.in b/networking/udhcp/Makefile.in
new file mode 100644
index 000000000..df32247c6
--- /dev/null
+++ b/networking/udhcp/Makefile.in
@@ -0,0 +1,53 @@
+# Makefile for busybox
+#
+# Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+#
+# Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+#
+
+UDHCP_AR:=udhcp.a
+ifndef $(UDHCP_DIR)
+UDHCP_DIR:=$(top_builddir)/networking/udhcp/
+endif
+srcdir=$(top_srcdir)/networking/udhcp
+
+#ok, so I forgot how to do an or, but this is a quick and dirty hack
+ifeq ($(strip $(CONFIG_UDHCPC)),y)
+CONFIG_UDHCP_SHARED=y
+else
+ifeq ($(strip $(CONFIG_UDHCPD)),y)
+CONFIG_UDHCP_SHARED=y
+else
+CONFIG_UDHCP_SHARED=n
+endif
+endif
+
+UDHCP-y:=
+UDHCP-$(CONFIG_UDHCP_SHARED)    += common.c options.c packet.c pidfile.c \
+				   signalpipe.c socket.c
+UDHCP-$(CONFIG_UDHCPC)		+= dhcpc.c clientpacket.c clientsocket.c \
+				   script.c
+UDHCP-$(CONFIG_UDHCPD)		+= dhcpd.c arpping.c files.c leases.c \
+				   serverpacket.c static_leases.c
+UDHCP-$(CONFIG_DUMPLEASES)	+= dumpleases.c
+UDHCP_OBJS:=$(patsubst %.c,$(UDHCP_DIR)%.o, $(UDHCP-y))
+
+ifneq ($(strip $(UDHCP-y)),)
+libraries-y+=$(UDHCP_DIR)$(UDHCP_AR)
+endif
+
+UDHCP-y:=$(patsubst %,$(srcdir)/%,$(UDHCP-y))
+UDHCP-a:=$(wildcard $(srcdir)/*.c)
+APPLET_SRC-y+=$(UDHCP-y)
+APPLET_SRC-a+=$(UDHCP-a)
+
+UDHCP_INCLUDES:=$(srcdir)
+
+APPLETS_DEFINE-y+=-DIN_BUSYBOX -I$(UDHCP_INCLUDES)
+APPLETS_DEFINE-a+=-DIN_BUSYBOX -I$(UDHCP_INCLUDES)
+
+$(UDHCP_DIR)$(UDHCP_AR): $(UDHCP_OBJS)
+	$(do_ar)
+
+$(UDHCP_OBJS): $(UDHCP_DIR)%.o : $(srcdir)/%.c
+	$(compile.c) -DIN_BUSYBOX
diff --git a/networking/udhcp/Makefile.udhcp b/networking/udhcp/Makefile.udhcp
new file mode 100644
index 000000000..1ba31c11c
--- /dev/null
+++ b/networking/udhcp/Makefile.udhcp
@@ -0,0 +1,110 @@
+# udhcp makefile
+
+DESTDIR     = 
+prefix      = /usr
+SBINDIR     = /sbin
+USRSBINDIR  = $(DESTDIR)$(prefix)/sbin
+USRBINDIR   = $(DESTDIR)$(prefix)/bin
+USRSHAREDIR = $(DESTDIR)$(prefix)/share
+
+# Uncomment this to get a shared binary. Call as udhcpd for the server,
+# and udhcpc for the client
+#COMBINED_BINARY=1
+
+# Uncomment this for extra output and to compile with debugging symbols
+#UDHCP_DEBUG=1
+
+# Uncomment this to output messages to syslog, otherwise, messages go to stdout
+#UDHCP_SYSLOG=1
+
+# Set to the prefix of your cross-compiler
+#CROSS_COMPILE=arm-uclibc-
+
+
+#---------------------------------------------------#
+# You should not have to change anything below here #
+#---------------------------------------------------#
+
+CC = $(CROSS_COMPILE)gcc
+LD = $(CROSS_COMPILE)gcc
+INSTALL = install
+
+OBJS_SHARED = common.o options.o packet.o pidfile.o signalpipe.o socket.o
+DHCPD_OBJS = dhcpd.o arpping.o files.o leases.o serverpacket.o static_leases.o
+DHCPC_OBJS = dhcpc.o clientpacket.o clientsocket.o script.o
+
+ifdef COMBINED_BINARY
+EXEC1 = udhcpd
+OBJS1 = $(DHCPD_OBJS) $(DHCPC_OBJS) $(OBJS_SHARED) frontend.o
+CFLAGS += -DCOMBINED_BINARY
+else
+EXEC1 = udhcpd
+OBJS1 = $(DHCPD_OBJS) $(OBJS_SHARED)
+
+EXEC2 = udhcpc
+OBJS2 = $(DHCPC_OBJS) $(OBJS_SHARED)
+endif
+
+EXEC3 = dumpleases
+OBJS3 = dumpleases.o
+
+BOOT_PROGRAM = udhcpc
+DAEMON = udhcpd
+COMMAND = dumpleases
+
+ifdef UDHCP_SYSLOG
+CFLAGS += -DUDHCP_SYSLOG
+endif
+
+CFLAGS += -W -Wall -Wstrict-prototypes -D_GNU_SOURCE
+
+ifdef UDHCP_DEBUG
+CFLAGS += -g -DUDHCP_DEBUG
+STRIP=true
+else
+CFLAGS += -Os -fomit-frame-pointer
+STRIP=$(CROSS_COMPILE)strip
+endif
+
+all: $(EXEC1) $(EXEC2) $(EXEC3)
+	$(STRIP) --remove-section=.note --remove-section=.comment $(EXEC1) $(EXEC2) $(EXEC3)
+
+$(OBJS1) $(OBJS2) $(OBJS3): *.h Makefile
+$(EXEC1) $(EXEC2) $(EXEC3): Makefile
+
+.c.o:
+	$(CC) -c $(CFLAGS) $<
+	
+$(EXEC1): $(OBJS1)
+	$(LD) $(CFLAGS) $(LDFLAGS) $(OBJS1) -o $(EXEC1)
+
+$(EXEC2): $(OBJS2)
+	$(LD) $(CFLAGS) $(LDFLAGS) $(OBJS2) -o $(EXEC2)
+
+$(EXEC3): $(OBJS3)
+	$(LD) $(CFLAGS) $(LDFLAGS) $(OBJS3) -o $(EXEC3)
+
+
+install: all
+	mkdir -p $(USRSBINDIR) $(USRBINDIR) 
+	$(INSTALL) -m 755 $(DAEMON) $(USRSBINDIR)
+	$(INSTALL) -m 755 $(COMMAND) $(USRBINDIR)
+ifdef COMBINED_BINARY
+	ln -sf $(DAEMON) $(USRSBINDIR)/$(BOOT_PROGRAM)
+else
+	$(INSTALL) -m 755 $(BOOT_PROGRAM) $(USRSBINDIR)
+endif
+	mkdir -p $(USRSHAREDIR)/udhcpc
+	for name in bound deconfig nak renew script ; do \
+		$(INSTALL) -m 755 samples/sample.$$name \
+			$(USRSHAREDIR)/udhcpc/default.$$name ; \
+	done
+	mkdir -p $(USRSHAREDIR)/man/man1
+	$(INSTALL) -m 644 dumpleases.1 $(USRSHAREDIR)/man/man1
+	mkdir -p $(USRSHAREDIR)/man/man5
+	$(INSTALL) -m 644 udhcpd.conf.5 $(USRSHAREDIR)/man/man5
+	mkdir -p $(USRSHAREDIR)/man/man8
+	$(INSTALL) -m 644 udhcpc.8 udhcpd.8 $(USRSHAREDIR)/man/man8
+
+clean:
+	-rm -f udhcpd udhcpc dumpleases *.o *.a core
diff --git a/networking/udhcp/README b/networking/udhcp/README
new file mode 100644
index 000000000..dd992949a
--- /dev/null
+++ b/networking/udhcp/README
@@ -0,0 +1,53 @@
+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.
+
+
+compile time options
+-------------------
+
+The Makefile contains three of the compile time options:
+
+	UDHCP_DEBUG: If UDHCP_DEBUG is defined, udhcpd will output extra
+	debugging output, compile with -g, and not fork to the background when
+	run.
+	UDHCP_SYSLOG: If UDHCP_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 three compile time options:
+
+	LEASE_TIME: The default lease time if not specified in the config
+	file.
+
+	LEASES_FILE: The default file for storing leases.
+
+	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.
+
diff --git a/networking/udhcp/README.dumpleases b/networking/udhcp/README.dumpleases
new file mode 100644
index 000000000..6367710c4
--- /dev/null
+++ b/networking/udhcp/README.dumpleases
@@ -0,0 +1,17 @@
+udhcp lease dump (dumpleases)
+----------------------------
+
+dumpleases displays the leases written out by the udhcpd server. 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. dumpleases accepts the
+following command line options:
+
+-a, --absolute		Interpret lease times as expiration time.
+-r, --remaining		Interpret lease times as remaining time.
+-f, --file=FILE		Read lease information from FILE.
+-h, --help 		Display help.
+
+Note that if udhcpd has not written a leases file recently, the output
+of may not be up to date.
+
diff --git a/networking/udhcp/README.udhcpc b/networking/udhcp/README.udhcpc
new file mode 100644
index 000000000..0417ff2ab
--- /dev/null
+++ b/networking/udhcp/README.udhcpc
@@ -0,0 +1,144 @@
+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.
+
+
+command line options
+-------------------
+
+The command line options for the udhcp client are:
+
+-c, --clientid=CLIENTID         Set client identifier.  Type is first char.
+-C, --clientid-none             Suppress default client identifier
+-V, --vendorclass=CLASSID       Set vendor class identifier
+-H, --hostname=HOSTNAME         Client hostname
+-h,                             Alias for -H
+-F, --fqdn=FQDN                 Client fully qualified domain name
+-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.
+
+
+udhcp client scripts
+-------------------
+
+When an event occurs, udhcpc calls the action script. udhcpc never does
+any configuration of the network interface itself, but instead relies on
+a set of scripts. 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 must 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
+	mask		- The number of bits in the netmask (ie: 24)
+	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.
+
+
+note on udhcpc's random seed
+---------------------------
+
+udhcpc will seed its random number generator (used for generating xid's)
+by reading /dev/urandom. If you have a lot of embedded systems on the same
+network, with no entropy, you can either seed /dev/urandom by a method of
+your own, or doing the following on startup:
+
+ifconfig eth0 > /dev/urandom
+
+in order to seed /dev/urandom with some data (mac address) unique to your
+system. If reading /dev/urandom fails, udhcpc will fall back to its old
+behavior of seeding with time(0).
+
+
+signals accepted by udhcpc
+-------------------------
+
+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
+-------------------
+
+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
+
diff --git a/networking/udhcp/README.udhcpd b/networking/udhcp/README.udhcpd
new file mode 100644
index 000000000..169de78ec
--- /dev/null
+++ b/networking/udhcp/README.udhcpd
@@ -0,0 +1,59 @@
+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 remaining 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
+
+compile time options
+-------------------
+
+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.
diff --git a/networking/udhcp/TODO b/networking/udhcp/TODO
new file mode 100644
index 000000000..6febe5ab4
--- /dev/null
+++ b/networking/udhcp/TODO
@@ -0,0 +1,16 @@
+TODO
+----
++ Check for valid IP, netmask, hostname, paths, strings, etc
++ Integrade README.*'s with manpages
++ using time(0) breaks if the system clock changes, find a portable solution
++ make failure of reading functions revert to previous value, not the default
++ sanity code for option[OPT_LEN]
++ fix aliasing (ie: eth0:0)
++ better standard linux distro support
++ make sure packet generation works on a wide varitey of arches
++ Interoperability testing
++ Hooks within the DHCP server
+	* Server notification when a lease is added/removed
++ Additional bootp support in client/server
++ Make serverid option in server configurable
++ Possibly add failure message to DHCP NAK
diff --git a/networking/udhcp/arpping.c b/networking/udhcp/arpping.c
new file mode 100644
index 000000000..df626f159
--- /dev/null
+++ b/networking/udhcp/arpping.c
@@ -0,0 +1,106 @@
+/*
+ * arpping.c
+ *
+ * Mostly stolen from: dhcpcd - DHCP client daemon
+ * by Yoichi Hariguchi <yoichi@fore.com>
+ */
+
+#include <sys/time.h>
+#include <time.h>
+#include <sys/socket.h>
+#include <netinet/if_ether.h>
+#include <net/if_arp.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "dhcpd.h"
+#include "arpping.h"
+#include "common.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(uint32_t yiaddr, uint32_t ip, uint8_t *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) {
+#ifdef IN_BUSYBOX
+		LOG(LOG_ERR, bb_msg_can_not_create_raw_socket);
+#else
+		LOG(LOG_ERR, "Could not open raw socket");
+#endif
+		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.h_dest, MAC_BCAST_ADDR, 6);		/* MAC DA */
+	memcpy(arp.h_source, mac, 6);			/* MAC SA */
+	arp.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 */
+	memcpy(arp.sInaddr, &ip, sizeof(ip));		/* source IP address */
+	memcpy(arp.sHaddr, mac, 6);			/* source hardware address */
+	memcpy(arp.tInaddr, &yiaddr, sizeof(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;
+	prevTime = uptime();
+	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: %m");
+			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) &&
+			    memcmp(arp.tHaddr, mac, 6) == 0 &&
+			    *((uint32_t *) arp.sInaddr) == yiaddr) {
+				DEBUG(LOG_INFO, "Valid arp reply receved for this address");
+				rv = 0;
+				break;
+			}
+		}
+		timeout -= uptime() - prevTime;
+		prevTime = uptime();
+	}
+	close(s);
+	DEBUG(LOG_INFO, "%salid arp replies for this address", rv ? "No v" : "V");
+	return rv;
+}
diff --git a/networking/udhcp/arpping.h b/networking/udhcp/arpping.h
new file mode 100644
index 000000000..30959ca99
--- /dev/null
+++ b/networking/udhcp/arpping.h
@@ -0,0 +1,35 @@
+/*
+ * 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 {
+	/* Ethernet header */
+	u_char   h_dest[6];			/* destination ether addr */
+	u_char   h_source[6];			/* source ether addr */
+	u_short  h_proto;			/* packet type ID field */
+
+	/* ARP packet */
+	uint16_t htype;				/* hardware type (must be ARPHRD_ETHER) */
+	uint16_t ptype;				/* protocol type (must be ETH_P_IP) */
+	uint8_t  hlen;				/* hardware address length (must be 6) */
+	uint8_t  plen;				/* protocol address length (must be 4) */
+	uint16_t operation;			/* ARP opcode */
+	uint8_t  sHaddr[6];			/* sender's hardware address */
+	uint8_t  sInaddr[4];			/* sender's IP address */
+	uint8_t  tHaddr[6];			/* target's hardware address */
+	uint8_t  tInaddr[4];			/* target's IP address */
+	uint8_t  pad[18];			/* pad for min. Ethernet payload (60 bytes) */
+} ATTRIBUTE_PACKED;
+
+/* function prototypes */
+int arpping(uint32_t yiaddr, uint32_t ip, uint8_t *arp, char *interface);
+
+#endif
diff --git a/networking/udhcp/clientpacket.c b/networking/udhcp/clientpacket.c
new file mode 100644
index 000000000..88d4d88dc
--- /dev/null
+++ b/networking/udhcp/clientpacket.c
@@ -0,0 +1,245 @@
+/* clientpacket.c
+ *
+ * Packet generation and dispatching functions for the DHCP client.
+ *
+ * Russ Dill <Russ.Dill@asu.edu> 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) || defined _NEWLIB_VERSION
+#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 <fcntl.h>
+
+
+#include "dhcpd.h"
+#include "clientpacket.h"
+#include "options.h"
+#include "dhcpc.h"
+#include "common.h"
+
+
+/* Create a random xid */
+unsigned long random_xid(void)
+{
+	static int initialized;
+	if (!initialized) {
+		int fd;
+		unsigned long seed;
+
+		fd = open("/dev/urandom", 0);
+		if (fd < 0 || read(fd, &seed, sizeof(seed)) < 0) {
+			LOG(LOG_WARNING, "Could not load seed from /dev/urandom: %m");
+			seed = time(0);
+		}
+		if (fd >= 0) close(fd);
+		srand(seed);
+		initialized++;
+	}
+	return rand();
+}
+
+
+/* initialize a packet with the proper defaults */
+static void init_packet(struct dhcpMessage *packet, char type)
+{
+	init_header(packet, type);
+	memcpy(packet->chaddr, client_config.arp, 6);
+	if (client_config.clientid)
+	    add_option_string(packet->options, client_config.clientid);
+	if (client_config.hostname) add_option_string(packet->options, client_config.hostname);
+	if (client_config.fqdn) add_option_string(packet->options, client_config.fqdn);
+	add_option_string(packet->options, client_config.vendorclass);
+}
+
+
+/* Add a parameter 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; dhcp_options[i].code; i++)
+		if (dhcp_options[i].flags & OPTION_REQ)
+			packet->options[end + OPT_DATA + len++] = dhcp_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;
+	uint32_t source, dest;
+	uint16_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) != (uint16_t) (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));
+
+}
diff --git a/networking/udhcp/clientpacket.h b/networking/udhcp/clientpacket.h
new file mode 100644
index 000000000..8e5441bc7
--- /dev/null
+++ b/networking/udhcp/clientpacket.h
@@ -0,0 +1,14 @@
+#ifndef _CLIENTPACKET_H
+#define _CLIENTPACKET_H
+
+#include "packet.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
diff --git a/networking/udhcp/clientsocket.c b/networking/udhcp/clientsocket.c
new file mode 100644
index 000000000..5d08421b3
--- /dev/null
+++ b/networking/udhcp/clientsocket.c
@@ -0,0 +1,62 @@
+/*
+ * clientsocket.c -- DHCP client socket creation
+ *
+ * udhcp client
+ *
+ * Russ Dill <Russ.Dill@asu.edu> 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 <unistd.h>
+#include <netinet/in.h>
+#include <features.h>
+#if (__GLIBC__ >= 2 && __GLIBC_MINOR >= 1) || defined _NEWLIB_VERSION
+#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 "clientsocket.h"
+#include "common.h"
+
+
+int raw_socket(int ifindex)
+{
+	int fd;
+	struct sockaddr_ll sock;
+
+	DEBUG(LOG_INFO, "Opening raw socket on ifindex %d", ifindex);
+	if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
+		DEBUG(LOG_ERR, "socket call failed: %m");
+		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: %m");
+		close(fd);
+		return -1;
+	}
+
+	return fd;
+}
diff --git a/networking/udhcp/clientsocket.h b/networking/udhcp/clientsocket.h
new file mode 100644
index 000000000..17a55c154
--- /dev/null
+++ b/networking/udhcp/clientsocket.h
@@ -0,0 +1,7 @@
+/* clientsocket.h */
+#ifndef _CLIENTSOCKET_H
+#define _CLIENTSOCKET_H
+
+int raw_socket(int ifindex);
+
+#endif
diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c
new file mode 100644
index 000000000..f36009a1c
--- /dev/null
+++ b/networking/udhcp/common.c
@@ -0,0 +1,135 @@
+/* vi: set sw=4 ts=4: */
+/* common.c
+ *
+ * Functions for debugging and logging as well as some other
+ * simple helper functions.
+ *
+ * Russ Dill <Russ.Dill@asu.edu> 2001-2003
+ * Rewritten by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <paths.h>
+#include <sys/socket.h>
+#include <stdarg.h>
+
+#include "common.h"
+#include "pidfile.h"
+
+
+static int daemonized;
+
+long uptime(void)
+{
+	struct sysinfo info;
+	sysinfo(&info);
+	return info.uptime;
+}
+
+
+/*
+ * This function makes sure our first socket calls
+ * aren't going to fd 1 (printf badness...) and are
+ * not later closed by daemon()
+ */
+static inline void sanitize_fds(void)
+{
+	int zero;
+	if ((zero = open(_PATH_DEVNULL, O_RDWR, 0)) < 0) return;
+	while (zero < 3) zero = dup(zero);
+	close(zero);
+}
+
+
+void background(const char *pidfile)
+{
+#ifdef __uClinux__
+	LOG(LOG_ERR, "Cannot background in uclinux (yet)");
+#else /* __uClinux__ */
+	int pid_fd;
+
+	/* hold lock during fork. */
+	pid_fd = pidfile_acquire(pidfile);
+	if (daemon(0, 0) == -1) { /* bb_xdaemon? */
+		perror("fork");
+		exit(1);
+	}
+	daemonized++;
+	pidfile_write_release(pid_fd);
+#endif /* __uClinux__ */
+}
+
+
+#ifdef UDHCP_SYSLOG
+
+void udhcp_logging(int level, const char *fmt, ...)
+{
+	va_list p;
+	va_list p2;
+
+	va_start(p, fmt);
+	__va_copy(p2, p);
+	if(!daemonized) {
+		vprintf(fmt, p);
+		putchar('\n');
+	}
+	vsyslog(level, fmt, p2);
+	va_end(p);
+}
+
+#else
+
+
+static char *syslog_level_msg[] = {
+	[LOG_EMERG]   = "EMERGENCY!",
+	[LOG_ALERT]   = "ALERT!",
+	[LOG_CRIT]    = "critical!",
+	[LOG_WARNING] = "warning",
+	[LOG_ERR]     = "error",
+	[LOG_INFO]    = "info",
+	[LOG_DEBUG]   = "debug"
+};
+
+
+void udhcp_logging(int level, const char *fmt, ...)
+{
+	va_list p;
+
+	va_start(p, fmt);
+	if(!daemonized) {
+		printf("%s, ", syslog_level_msg[level]);
+		vprintf(fmt, p);
+		putchar('\n');
+	}
+	va_end(p);
+}
+#endif
+
+
+void start_log_and_pid(const char *client_server, const char *pidfile)
+{
+	int pid_fd;
+
+	/* Make sure our syslog fd isn't overwritten */
+	sanitize_fds();
+
+	/* do some other misc startup stuff while we are here to save bytes */
+	pid_fd = pidfile_acquire(pidfile);
+	pidfile_write_release(pid_fd);
+
+	/* equivelent of doing a fflush after every \n */
+	setlinebuf(stdout);
+
+#ifdef UDHCP_SYSLOG
+	openlog(client_server, LOG_PID | LOG_CONS, LOG_LOCAL0);
+#endif
+
+	udhcp_logging(LOG_INFO, "%s (v%s) started", client_server, VERSION);
+}
diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h
new file mode 100644
index 000000000..071a5c428
--- /dev/null
+++ b/networking/udhcp/common.h
@@ -0,0 +1,55 @@
+/* common.h
+ *
+ * Russ Dill <Russ.Dill@asu.edu> September 2001
+ * Rewritten by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
+ *
+ * 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.
+ */
+
+#ifndef _COMMON_H
+#define _COMMON_H
+
+#include "version.h"
+#include "libbb_udhcp.h"
+
+
+#ifndef UDHCP_SYSLOG
+enum syslog_levels {
+	LOG_EMERG = 0,
+	LOG_ALERT,
+	LOG_CRIT,
+	LOG_WARNING,
+	LOG_ERR,
+	LOG_INFO,
+	LOG_DEBUG
+};
+#else
+#include <syslog.h>
+#endif
+
+long uptime(void);
+void background(const char *pidfile);
+void start_log_and_pid(const char *client_server, const char *pidfile);
+void udhcp_logging(int level, const char *fmt, ...);
+
+#define LOG(level, str, args...) udhcp_logging(level, str, ## args)
+
+#ifdef UDHCP_DEBUG
+# define DEBUG(level, str, args...) LOG(level, str, ## args)
+#else
+# define DEBUG(level, str, args...) do {;} while(0)
+#endif
+
+#endif
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
new file mode 100644
index 000000000..222bd6519
--- /dev/null
+++ b/networking/udhcp/dhcpc.c
@@ -0,0 +1,574 @@
+/* dhcpc.c
+ *
+ * udhcp DHCP client
+ *
+ * Russ Dill <Russ.Dill@asu.edu> July 2001
+ *
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ */
+
+#include <sys/time.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 "common.h"
+#include "dhcpd.h"
+#include "dhcpc.h"
+#include "options.h"
+#include "clientpacket.h"
+#include "clientsocket.h"
+#include "script.h"
+#include "socket.h"
+#include "signalpipe.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 = -1;
+
+#define LISTEN_NONE 0
+#define LISTEN_KERNEL 1
+#define LISTEN_RAW 2
+static int listen_mode;
+
+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,
+	.vendorclass = NULL,
+	.hostname = NULL,
+	.fqdn = NULL,
+	.ifindex = 0,
+	.retries = 3,
+	.timeout = 3,
+	.arp = "\0\0\0\0\0\0",		/* appease gcc-3.0 */
+};
+
+#ifndef IN_BUSYBOX
+static void ATTRIBUTE_NORETURN show_usage(void)
+{
+	printf(
+"Usage: udhcpc [OPTIONS]\n\n"
+"  -c, --clientid=CLIENTID         Set client identifier - type is first char\n"
+"  -C, --clientid-none             Suppress default client identifier\n"
+"  -V, --vendorclass=CLASSID       Set vendor class identifier\n"
+"  -H, --hostname=HOSTNAME         Client hostname\n"
+"  -h                              Alias for -H\n"
+"  -F, --fqdn=FQDN                 Client fully qualified domain name\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"
+"  -T, --timeout=seconds           Try to get the lease for the amount of\n"
+"                                  seconds (default: 3)\n"
+"  -t, --retries=NUM               Send up to NUM request packets\n"
+"  -v, --version                   Display version\n"
+	);
+	exit(0);
+}
+#else
+#define show_usage bb_show_usage
+extern void show_usage(void) ATTRIBUTE_NORETURN;
+#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");
+	if (fd >= 0) 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 BOUND:
+		change_mode(LISTEN_KERNEL);
+	case RENEWING:
+	case REBINDING:
+		state = RENEW_REQUESTED;
+		break;
+	case RENEW_REQUESTED: /* impatient are we? fine, square 1 */
+		run_script(NULL, "deconfig");
+	case REQUESTING:
+	case RELEASED:
+		change_mode(LISTEN_RAW);
+		state = INIT_SELECTING;
+		break;
+	case INIT_SELECTING:
+		break;
+	}
+
+	/* 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;
+}
+
+
+static void client_background(void)
+{
+	background(client_config.pidfile);
+	client_config.foreground = 1; /* Do not fork again. */
+	client_config.background_if_no_lease = 0;
+}
+
+
+#ifdef COMBINED_BINARY
+int udhcpc_main(int argc, char *argv[])
+#else
+int main(int argc, char *argv[])
+#endif
+{
+	uint8_t *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;
+	long now;
+	int max_fd;
+	int sig;
+	int no_clientid = 0;
+
+	static const struct option arg_options[] = {
+		{"clientid",	required_argument,	0, 'c'},
+		{"clientid-none", no_argument,		0, 'C'},
+		{"vendorclass",	required_argument,	0, 'V'},
+		{"foreground",	no_argument,		0, 'f'},
+		{"background",	no_argument,		0, 'b'},
+		{"hostname",	required_argument,	0, 'H'},
+		{"hostname",	required_argument,	0, 'h'},
+		{"fqdn",	required_argument,	0, 'F'},
+		{"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'},
+		{"timeout",	required_argument,	0, 'T'},
+		{"version",	no_argument,		0, 'v'},
+		{"retries",	required_argument,	0, 't'},		
+		{0, 0, 0, 0}
+	};
+
+	/* get options */
+	while (1) {
+		int option_index = 0;
+		c = getopt_long(argc, argv, "c:CV:fbH:h:F:i:np:qr:s:T:t:v", arg_options, &option_index);
+		if (c == -1) break;
+
+		switch (c) {
+		case 'c':
+			if (no_clientid) show_usage();
+			len = strlen(optarg) > 255 ? 255 : strlen(optarg);
+			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((char*)client_config.clientid + OPT_DATA, optarg, len);
+			break;
+		case 'C':
+			if (client_config.clientid) show_usage();
+			no_clientid = 1;
+			break;
+		case 'V':
+			len = strlen(optarg) > 255 ? 255 : strlen(optarg);
+			free(client_config.vendorclass);
+			client_config.vendorclass = xmalloc(len + 2);
+			client_config.vendorclass[OPT_CODE] = DHCP_VENDOR;
+			client_config.vendorclass[OPT_LEN] = len;
+			strncpy((char*)client_config.vendorclass + 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);
+			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((char*)client_config.hostname + 2, optarg, len);
+			break;
+		case 'F':
+			len = strlen(optarg) > 255 ? 255 : strlen(optarg);
+			free(client_config.fqdn);
+			client_config.fqdn = xmalloc(len + 5);
+			client_config.fqdn[OPT_CODE] = DHCP_FQDN;
+			client_config.fqdn[OPT_LEN] = len + 3;
+			/* Flags: 0000NEOS
+			S: 1 => Client requests Server to update A RR in DNS as well as PTR
+			O: 1 => Server indicates to client that DNS has been updated regardless
+			E: 1 => Name data is DNS format, i.e. <4>host<6>domain<4>com<0> not "host.domain.com"
+			N: 1 => Client requests Server to not update DNS
+			*/
+			client_config.fqdn[OPT_LEN + 1] = 0x1;
+			client_config.fqdn[OPT_LEN + 2] = 0;
+			client_config.fqdn[OPT_LEN + 3] = 0;
+			strncpy((char*)client_config.fqdn + 5, 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 'T':
+			client_config.timeout = atoi(optarg);
+			break;
+		case 't':
+			client_config.retries = atoi(optarg);
+			break;
+		case 'v':
+			printf("udhcpcd, version %s\n\n", VERSION);
+			return 0;
+			break;
+		default:
+			show_usage();
+		}
+	}
+
+	/* Start the log, sanitize fd's, and write a pid file */
+	start_log_and_pid("udhcpc", client_config.pidfile);
+
+	if (read_interface(client_config.interface, &client_config.ifindex,
+			   NULL, client_config.arp) < 0)
+		return 1;
+
+	/* if not set, and not suppressed, setup the default client ID */
+	if (!client_config.clientid && !no_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);
+	}
+
+	if (!client_config.vendorclass) {
+		client_config.vendorclass = xmalloc(sizeof("udhcp "VERSION) + 2);
+		client_config.vendorclass[OPT_CODE] = DHCP_VENDOR;
+		client_config.vendorclass[OPT_LEN] = sizeof("udhcp "VERSION) - 1;
+		client_config.vendorclass[OPT_DATA] = 1;
+		memcpy(&client_config.vendorclass[OPT_DATA],
+			"udhcp "VERSION, sizeof("udhcp "VERSION) - 1);
+	}
+
+
+	/* setup the signal pipe */
+	udhcp_sp_setup();
+
+	state = INIT_SELECTING;
+	run_script(NULL, "deconfig");
+	change_mode(LISTEN_RAW);
+
+	for (;;) {
+
+		tv.tv_sec = timeout - uptime();
+		tv.tv_usec = 0;
+
+		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, %m");
+				return 0;
+			}
+		}
+		max_fd = udhcp_sp_fd_set(&rfds, fd);
+
+		if (tv.tv_sec > 0) {
+			DEBUG(LOG_INFO, "Waiting on select...");
+			retval = select(max_fd + 1, &rfds, NULL, NULL, &tv);
+		} else retval = 0; /* If we already timed out, fall through */
+
+		now = uptime();
+		if (retval == 0) {
+			/* timeout dropped to zero */
+			switch (state) {
+			case INIT_SELECTING:
+				if (packet_num < client_config.retries) {
+					if (packet_num == 0)
+						xid = random_xid();
+
+					/* send discover packet */
+					send_discover(xid, requested_ip); /* broadcast */
+
+					timeout = now + client_config.timeout;
+					packet_num++;
+				} else {
+					run_script(NULL, "leasefail");
+					if (client_config.background_if_no_lease) {
+						LOG(LOG_INFO, "No lease, forking to background.");
+						client_background();
+					} else if (client_config.abort_if_no_lease) {
+						LOG(LOG_INFO, "No lease, failing.");
+						return 1;
+					}
+					/* wait to try again */
+					packet_num = 0;
+					timeout = now + 60;
+				}
+				break;
+			case RENEW_REQUESTED:
+			case REQUESTING:
+				if (packet_num < client_config.retries) {
+					/* 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 */
+					if (state == RENEW_REQUESTED) run_script(NULL, "deconfig");
+					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, %m, reopening socket");
+				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;
+			}
+
+			/* Ignore packets that aren't for us */
+			if (memcmp(packet.chaddr, client_config.arp, 6)) {
+				DEBUG(LOG_INFO, "packet does not have our chaddr -- ignoring");
+				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)
+						return 0;
+					if (!client_config.foreground)
+						client_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 && (sig = udhcp_sp_read(&rfds))) {
+			switch (sig) {
+			case SIGUSR1:
+				perform_renew();
+				break;
+			case SIGUSR2:
+				perform_release();
+				break;
+			case SIGTERM:
+				LOG(LOG_INFO, "Received SIGTERM");
+				return 0;
+			}
+		} else if (retval == -1 && errno == EINTR) {
+			/* a signal was caught */
+		} else {
+			/* An error occured */
+			DEBUG(LOG_ERR, "Error on select");
+		}
+
+	}
+	return 0;
+}
diff --git a/networking/udhcp/dhcpc.h b/networking/udhcp/dhcpc.h
new file mode 100644
index 000000000..7c93f4232
--- /dev/null
+++ b/networking/udhcp/dhcpc.h
@@ -0,0 +1,39 @@
+/* dhcpc.h */
+#ifndef _DHCPC_H
+#define _DHCPC_H
+
+/* grab define DEFAULT_SCRIPT */
+#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 */
+	uint8_t *clientid;		/* Optional client id to use */
+	uint8_t *vendorclass;		/* Optional vendor class-id to use */
+	uint8_t *hostname;		/* Optional hostname to use */
+	uint8_t *fqdn;			/* Optional fully qualified domain name to use */
+	int ifindex;			/* Index number of the interface to use */
+	int retries;			/* Max number of request packets */        
+	int timeout;			/* Number of seconds to try to get a lease */
+	uint8_t arp[6];			/* Our arp address */
+};
+
+extern struct client_config_t client_config;
+
+
+#endif
diff --git a/networking/udhcp/dhcpd.c b/networking/udhcp/dhcpd.c
new file mode 100644
index 000000000..0dfc0b559
--- /dev/null
+++ b/networking/udhcp/dhcpd.c
@@ -0,0 +1,273 @@
+/* dhcpd.c
+ *
+ * udhcp Server
+ * Copyright (C) 1999 Matthew Ramsay <matthewr@moreton.com.au>
+ *			Chris Trew <ctrew@moreton.com.au>
+ *
+ * Rewrite by Russ Dill <Russ.Dill@asu.edu> 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 <arpa/inet.h>
+#include <netdb.h>
+#include <netinet/in.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 "dhcpd.h"
+#include "arpping.h"
+#include "socket.h"
+#include "options.h"
+#include "files.h"
+#include "serverpacket.h"
+#include "common.h"
+#include "signalpipe.h"
+#include "static_leases.h"
+
+
+/* globals */
+struct dhcpOfferedAddr *leases;
+struct server_config_t server_config;
+
+
+#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;
+	uint8_t *state;
+	uint8_t *server_id, *requested;
+	uint32_t server_id_align, requested_align;
+	unsigned long timeout_end;
+	struct option_set *option;
+	struct dhcpOfferedAddr *lease;
+	struct dhcpOfferedAddr static_lease;
+	int max_sock;
+	unsigned long num_ips;
+
+	uint32_t static_lease_ip;
+
+	memset(&server_config, 0, sizeof(struct server_config_t));
+	read_config(argc < 2 ? DHCPD_CONF_FILE : argv[1]);
+
+	/* Start the log, sanitize fd's, and write a pid file */
+	start_log_and_pid("udhcpd", server_config.pidfile);
+
+	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;
+
+	/* Sanity check */
+	num_ips = ntohl(server_config.end) - ntohl(server_config.start) + 1;
+	if (server_config.max_leases > num_ips) {
+		LOG(LOG_ERR, "max_leases value (%lu) not sane, "
+			"setting to %lu instead",
+			server_config.max_leases, num_ips);
+		server_config.max_leases = num_ips;
+	}
+
+	leases = xcalloc(server_config.max_leases, sizeof(struct dhcpOfferedAddr));
+	read_leases(server_config.lease_file);
+
+	if (read_interface(server_config.interface, &server_config.ifindex,
+			   &server_config.server, server_config.arp) < 0)
+		return 1;
+
+#ifndef UDHCP_DEBUG
+	background(server_config.pidfile); /* hold lock during fork. */
+#endif
+
+	/* Setup the signal pipe */
+	udhcp_sp_setup();
+
+	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, %m");
+				return 2;
+			}
+
+		max_sock = udhcp_sp_fd_set(&rfds, server_socket);
+		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) {
+			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;
+		}
+
+		switch (udhcp_sp_read(&rfds)) {
+		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");
+			return 0;
+		case 0: break;		/* no signal */
+		default: continue;	/* signal or error (probably EINTR) */
+		}
+
+		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, %m, reopening socket");
+				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;
+		}
+
+		/* Look for a static lease */
+		static_lease_ip = getIpByMac(server_config.static_leases, &packet.chaddr);
+
+		if(static_lease_ip)
+		{
+			printf("Found static lease: %x\n", static_lease_ip);
+
+			memcpy(&static_lease.chaddr, &packet.chaddr, 16);
+			static_lease.yiaddr = static_lease_ip;
+			static_lease.expires = 0;
+
+			lease = &static_lease;
+
+		}
+		else
+		{
+		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) {
+				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;
+}
+
diff --git a/networking/udhcp/dhcpd.h b/networking/udhcp/dhcpd.h
new file mode 100644
index 000000000..a060002cd
--- /dev/null
+++ b/networking/udhcp/dhcpd.h
@@ -0,0 +1,141 @@
+/* dhcpd.h */
+#ifndef _DHCPD_H
+#define _DHCPD_H
+
+#include <netinet/ip.h>
+#include <netinet/udp.h>
+
+#include "libbb_udhcp.h"
+#include "leases.h"
+#include "version.h"
+
+/************************************/
+/* Defaults _you_ may want to tweak */
+/************************************/
+
+/* the period of time the client is allowed to use that address */
+#define LEASE_TIME              (60*60*24*10) /* 10 days of seconds */
+#define LEASES_FILE		"/var/lib/misc/udhcpd.leases"
+
+/* 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_FQDN		0x51
+
+#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		(uint8_t *) "\xff\xff\xff\xff\xff\xff"
+#define OPT_CODE 0
+#define OPT_LEN 1
+#define OPT_DATA 2
+
+struct option_set {
+	uint8_t *data;
+	struct option_set *next;
+};
+
+struct static_lease {
+	uint8_t *mac;
+	uint32_t *ip;
+	struct static_lease *next;
+};
+
+struct server_config_t {
+	uint32_t server;		/* Our IP, in network order */
+	uint32_t start;			/* Start address of leases, network order */
+	uint32_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 */
+	uint8_t 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 */
+	uint32_t siaddr;		/* next server bootp option */
+	char *sname;			/* bootp server name */
+	char *boot_file;		/* bootp boot file option */
+	struct static_lease *static_leases; /* List of ip/mac pairs to assign static leases */
+};
+
+extern struct server_config_t server_config;
+extern struct dhcpOfferedAddr *leases;
+
+
+#endif
diff --git a/networking/udhcp/dumpleases.1 b/networking/udhcp/dumpleases.1
new file mode 100644
index 000000000..04a04da15
--- /dev/null
+++ b/networking/udhcp/dumpleases.1
@@ -0,0 +1,30 @@
+.TH DUMPLEASES 1 2001-09-27 GNU/Linux "GNU/Linux Administrator's Manual"
+.SH NAME
+dumpleases \- display leases granted by udhcp server
+.SH SYNOPSIS
+.B dumpleases
+.RI [ OPTION ]...
+.SH DESCRIPTION
+Display the DHCP leases granted by
+.BR udhcpd (8).
+.SH OPTIONS
+.TP
+.BR \-a ,\  \-\-absolute
+Interpret lease times as expiration time.
+.TP
+.BI \-f\  FILE,\  \-\-file= FILE
+Read lease information from
+.IR FILE .
+.TP
+.BR \-h ,\  \-\-help
+Display help.
+.TP
+.BR \-r ,\  \-\-remaining
+Interpret lease times as remaining time.
+.SH FILES
+.TP
+.I /var/lib/misc/udhcpd.leases
+Lease information file.
+.SH SEE ALSO
+.BR udhcpd (8),
+.BR udhcpd.conf (5).
diff --git a/networking/udhcp/dumpleases.c b/networking/udhcp/dumpleases.c
new file mode 100644
index 000000000..c0c58ee35
--- /dev/null
+++ b/networking/udhcp/dumpleases.c
@@ -0,0 +1,114 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ */
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/wait.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <time.h>
+
+#include "dhcpd.h"
+#include "leases.h"
+#include "libbb_udhcp.h"
+
+#define REMAINING 0
+#define ABSOLUTE 1
+
+
+#ifndef IN_BUSYBOX
+static void ATTRIBUTE_NORETURN show_usage(void)
+{
+	printf(
+"Usage: dumpleases -f <file> -[r|a]\n\n"
+"  -f, --file=FILENAME             Leases file to load\n"
+"  -r, --remaining                 Interepret lease times as time remaing\n"
+"  -a, --absolute                  Interepret lease times as expire time\n");
+	exit(0);
+}
+#else
+#define show_usage bb_show_usage
+#endif
+
+
+#ifdef IN_BUSYBOX
+int dumpleases_main(int argc, char *argv[])
+#else
+int main(int argc, char *argv[])
+#endif
+{
+	FILE *fp;
+	int i, c, mode = REMAINING;
+	long expires;
+	const char *file = LEASES_FILE;
+	struct dhcpOfferedAddr lease;
+	struct in_addr addr;
+
+	static const struct option options[] = {
+		{"absolute", 0, 0, 'a'},
+		{"remaining", 0, 0, 'r'},
+		{"file", 1, 0, 'f'},
+		{0, 0, 0, 0}
+	};
+
+	while (1) {
+		int option_index = 0;
+		c = getopt_long(argc, argv, "arf:", options, &option_index);
+		if (c == -1) break;
+
+		switch (c) {
+		case 'a': mode = ABSOLUTE; break;
+		case 'r': mode = REMAINING; break;
+		case 'f':
+			file = optarg;
+			break;
+		default:
+			show_usage();
+		}
+	}
+
+	fp = xfopen(file, "r");
+
+	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 > 60*60*24) {
+					printf("%ld days, ", expires / (60*60*24));
+					expires %= 60*60*24;
+				}
+				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;
+}
diff --git a/networking/udhcp/files.c b/networking/udhcp/files.c
new file mode 100644
index 000000000..fe853c7cc
--- /dev/null
+++ b/networking/udhcp/files.c
@@ -0,0 +1,393 @@
+/*
+ * files.c -- DHCP server file manipulation *
+ * Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001
+ */
+
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+#include <ctype.h>
+#include <netdb.h>
+
+#include <netinet/ether.h>
+#include "static_leases.h"
+
+#include "dhcpd.h"
+#include "options.h"
+#include "files.h"
+#include "common.h"
+
+/*
+ * Domain names may have 254 chars, and string options can be 254
+ * chars long. However, 80 bytes will be enough for most, and won't
+ * hog up memory. If you have a special application, change it
+ */
+#define READ_CONFIG_BUF_SIZE 80
+
+/* on these functions, make sure you datatype matches */
+static int read_ip(const 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_mac(const char *line, void *arg)
+{
+	uint8_t *mac_bytes = arg;
+	struct ether_addr *temp_ether_addr;
+	int retval = 1;
+
+	temp_ether_addr = ether_aton(line);
+
+	if(temp_ether_addr == NULL)
+		retval = 0;
+	else
+		memcpy(mac_bytes, temp_ether_addr, 6);
+
+	return retval;
+}
+
+
+static int read_str(const char *line, void *arg)
+{
+	char **dest = arg;
+
+	free(*dest);
+	*dest = strdup(line);
+
+	return 1;
+}
+
+
+static int read_u32(const char *line, void *arg)
+{
+	uint32_t *dest = arg;
+	char *endptr;
+	*dest = strtoul(line, &endptr, 0);
+	return endptr[0] == '\0';
+}
+
+
+static int read_yn(const 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;
+}
+
+
+/* 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 */
+static 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 = xmalloc(sizeof(struct option_set));
+		new->data = xmalloc(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;
+	}
+}
+
+
+/* read a dhcp option and add it to opt_list */
+static int read_opt(const char *const_line, void *arg)
+{
+	struct option_set **opt_list = arg;
+	char *opt, *val, *endptr;
+	struct dhcp_option *option;
+	int retval = 0, length;
+	char buffer[8];
+	char *line;
+	uint16_t *result_u16 = (uint16_t *) buffer;
+	uint32_t *result_u32 = (uint32_t *) buffer;
+
+	/* Cheat, the only const line we'll actually get is "" */
+	line = (char *) const_line;
+	if (!(opt = strtok(line, " \t="))) return 0;
+
+	for (option = dhcp_options; option->code; option++)
+		if (!strcasecmp(option->name, opt))
+			break;
+
+	if (!option->code) return 0;
+
+	do {
+		if (!(val = strtok(NULL, ", \t"))) break;
+		length = option_lengths[option->flags & TYPE_MASK];
+		retval = 0;
+		opt = buffer; /* new meaning for variable opt */
+		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;
+				opt = val;
+				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));
+			retval = (endptr[0] == '\0');
+			break;
+		case OPTION_S16:
+			*result_u16 = htons(strtol(val, &endptr, 0));
+			retval = (endptr[0] == '\0');
+			break;
+		case OPTION_U32:
+			*result_u32 = htonl(strtoul(val, &endptr, 0));
+			retval = (endptr[0] == '\0');
+			break;
+		case OPTION_S32:
+			*result_u32 = htonl(strtol(val, &endptr, 0));
+			retval = (endptr[0] == '\0');
+			break;
+		default:
+			break;
+		}
+		if (retval)
+			attach_option(opt_list, option, opt, length);
+	} while (retval && option->flags & OPTION_LIST);
+	return retval;
+}
+
+static int read_staticlease(const char *const_line, void *arg)
+{
+
+	char *line;
+	char *mac_string;
+	char *ip_string;
+	uint8_t *mac_bytes;
+	uint32_t *ip;
+
+
+	/* Allocate memory for addresses */
+	mac_bytes = xmalloc(sizeof(unsigned char) * 8);
+	ip = xmalloc(sizeof(uint32_t));
+
+	/* Read mac */
+	line = (char *) const_line;
+	mac_string = strtok(line, " \t");
+	read_mac(mac_string, mac_bytes);
+
+	/* Read ip */
+	ip_string = strtok(NULL, " \t");
+	read_ip(ip_string, ip);
+
+	addStaticLease(arg, mac_bytes, ip);
+
+#ifdef UDHCP_DEBUG
+	printStaticLeases(arg);
+#endif
+
+	return 1;
+
+}
+
+
+static const struct config_keyword keywords[] = {
+	/* keyword	handler   variable address		default */
+	{"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),	LEASES_FILE},
+	{"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),	""},
+	{"static_lease",read_staticlease, &(server_config.static_leases),	""},
+	/*ADDME: static lease */
+	{"",		NULL,	  NULL,				""}
+};
+
+
+int read_config(const char *file)
+{
+	FILE *in;
+	char buffer[READ_CONFIG_BUF_SIZE], *token, *line;
+#ifdef UDHCP_DEBUG
+	char orig[READ_CONFIG_BUF_SIZE];
+#endif
+	int i, lm = 0;
+
+	for (i = 0; keywords[i].keyword[0]; i++)
+		if (keywords[i].def[0])
+			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, READ_CONFIG_BUF_SIZE, in)) {
+		lm++;
+		if (strchr(buffer, '\n')) *(strchr(buffer, '\n')) = '\0';
+#ifdef UDHCP_DEBUG
+		strcpy(orig, buffer);
+#endif
+		if (strchr(buffer, '#')) *(strchr(buffer, '#')) = '\0';
+
+		if (!(token = strtok(buffer, " \t"))) continue;
+		if (!(line = strtok(NULL, ""))) continue;
+
+		/* 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; keywords[i].keyword[0]; i++)
+			if (!strcasecmp(token, keywords[i].keyword))
+				if (!keywords[i].handler(line, keywords[i].var)) {
+					LOG(LOG_ERR, "Failure parsing line %d of %s", lm, file);
+					DEBUG(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 tmp_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) {
+
+			/* screw with the time in the struct, for easier writing */
+			tmp_time = leases[i].expires;
+
+			if (server_config.remaining) {
+				if (lease_expired(&(leases[i])))
+					leases[i].expires = 0;
+				else leases[i].expires -= curr;
+			} /* else stick with the time we got */
+			leases[i].expires = htonl(leases[i].expires);
+			fwrite(&leases[i], sizeof(struct dhcpOfferedAddr), 1, fp);
+
+			/* Then restore it when done. */
+			leases[i].expires = tmp_time;
+		}
+	}
+	fclose(fp);
+
+	if (server_config.notify_file) {
+		sprintf(buf, "%s %s", server_config.notify_file, server_config.lease_file);
+		system(buf);
+	}
+}
+
+
+void read_leases(const 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);
+}
diff --git a/networking/udhcp/files.h b/networking/udhcp/files.h
new file mode 100644
index 000000000..03acee2fc
--- /dev/null
+++ b/networking/udhcp/files.h
@@ -0,0 +1,19 @@
+/* files.h */
+#ifndef _FILES_H
+#define _FILES_H
+
+struct config_keyword {
+	const char *keyword;
+	int (* const handler)(const char *line, void *var);
+	void *var;
+	const char *def;
+};
+
+
+int read_config(const char *file);
+void write_leases(void);
+void read_leases(const char *file);
+
+struct option_set *find_option(struct option_set *opt_list, char code);
+
+#endif
diff --git a/networking/udhcp/frontend.c b/networking/udhcp/frontend.c
new file mode 100644
index 000000000..fa77ab977
--- /dev/null
+++ b/networking/udhcp/frontend.c
@@ -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;
+}
diff --git a/networking/udhcp/leases.c b/networking/udhcp/leases.c
new file mode 100644
index 000000000..bb08c3adb
--- /dev/null
+++ b/networking/udhcp/leases.c
@@ -0,0 +1,158 @@
+/*
+ * leases.c -- tools to manage DHCP leases
+ * Russ Dill <Russ.Dill@asu.edu> July 2001
+ */
+
+#include <time.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include "dhcpd.h"
+#include "files.h"
+#include "options.h"
+#include "leases.h"
+#include "arpping.h"
+#include "common.h"
+
+#include "static_leases.h"
+
+
+uint8_t blank_chaddr[] = {[0 ... 15] = 0};
+
+/* clear every lease out that chaddr OR yiaddr matches and is nonzero */
+void clear_lease(uint8_t *chaddr, uint32_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(uint8_t *chaddr, uint32_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(uint8_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(uint32_t yiaddr)
+{
+	unsigned int i;
+
+	for (i = 0; i < server_config.max_leases; i++)
+		if (leases[i].yiaddr == yiaddr) return &(leases[i]);
+
+	return NULL;
+}
+
+
+/* check is an IP is taken, if it is, add it to the lease table */
+static int check_ip(uint32_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;
+}
+
+
+/* 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... */
+uint32_t find_address(int check_expired)
+{
+	uint32_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;
+
+		/* Only do if it isn't an assigned as a static lease */
+		if(!reservedIp(server_config.static_leases, htonl(addr)))
+		{
+
+		/* 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;
+}
diff --git a/networking/udhcp/leases.h b/networking/udhcp/leases.h
new file mode 100644
index 000000000..b13fa72d3
--- /dev/null
+++ b/networking/udhcp/leases.h
@@ -0,0 +1,23 @@
+/* leases.h */
+#ifndef _LEASES_H
+#define _LEASES_H
+
+
+struct dhcpOfferedAddr {
+	uint8_t chaddr[16];
+	uint32_t yiaddr;	/* network order */
+	uint32_t expires;	/* host order */
+};
+
+extern uint8_t blank_chaddr[];
+
+void clear_lease(uint8_t *chaddr, uint32_t yiaddr);
+struct dhcpOfferedAddr *add_lease(uint8_t *chaddr, uint32_t yiaddr, unsigned long lease);
+int lease_expired(struct dhcpOfferedAddr *lease);
+struct dhcpOfferedAddr *oldest_expired_lease(void);
+struct dhcpOfferedAddr *find_lease_by_chaddr(uint8_t *chaddr);
+struct dhcpOfferedAddr *find_lease_by_yiaddr(uint32_t yiaddr);
+uint32_t find_address(int check_expired);
+
+
+#endif
diff --git a/networking/udhcp/libbb_udhcp.h b/networking/udhcp/libbb_udhcp.h
new file mode 100644
index 000000000..cce826786
--- /dev/null
+++ b/networking/udhcp/libbb_udhcp.h
@@ -0,0 +1,92 @@
+/* libbb_udhcp.h - busybox compatibility wrapper */
+
+/* bit of a hack, do this no matter what the order of the includes.
+ * (for busybox) */
+
+#ifndef _LIBBB_UDHCP_H
+#define _LIBBB_UDHCP_H
+
+#ifdef CONFIG_INSTALL_NO_USR
+# define DEFAULT_SCRIPT  "/share/udhcpc/default.script"
+#else
+# define DEFAULT_SCRIPT  "/usr/share/udhcpc/default.script"
+#endif
+
+#ifdef IN_BUSYBOX
+#include "busybox.h"
+
+#ifdef CONFIG_FEATURE_UDHCP_SYSLOG
+#define UDHCP_SYSLOG
+#endif
+
+#ifdef CONFIG_FEATURE_UDHCP_DEBUG
+#define UDHCP_DEBUG
+#endif
+
+#define COMBINED_BINARY
+#include "version.h"
+
+#define xfopen bb_xfopen
+
+/* make safe the exported namespace */
+/* from common.h */
+#define background		udhcp_background
+#define start_log_and_pid	udhcp_start_log_and_pid
+/* from script.h */
+#define run_script		udhcp_run_script
+/* from packet.h */
+#define init_header		udhcp_init_header
+#define get_packet		udhcp_get_packet
+#define checksum		udhcp_checksum
+#define raw_packet		udhcp_raw_packet
+#define kernel_packet		udhcp_kernel_packet
+/* from pidfile.h */
+#define pidfile_acquire		udhcp_pidfile_acquire
+#define pidfile_write_release	udhcp_pidfile_write_release
+/* from options.h */
+#define get_option		udhcp_get_option
+#define end_option		udhcp_end_option
+#define add_option_string	udhcp_add_option_string
+#define add_simple_option	udhcp_add_simple_option
+#define option_lengths		udhcp_option_lengths
+/* from socket.h */
+#define listen_socket		udhcp_listen_socket
+#define read_interface		udhcp_read_interface
+/* from dhcpc.h */
+#define client_config		udhcp_client_config
+/* from dhcpd.h */
+#define server_config		udhcp_server_config
+
+#else /* ! IN_BUSYBOX */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/sysinfo.h>
+
+#ifndef ATTRIBUTE_NORETURN
+#define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
+#endif /* ATTRIBUTE_NORETURN */
+
+#ifndef ATTRIBUTE_PACKED
+#define ATTRIBUTE_PACKED __attribute__ ((__packed__))
+#endif /* ATTRIBUTE_PACKED */
+
+#define TRUE			1
+#define FALSE			0
+
+#define xmalloc malloc
+#define xcalloc calloc
+
+static inline FILE *xfopen(const char *file, const char *mode)
+{
+	FILE *fp;
+	if (!(fp = fopen(file, mode))) {
+		perror("could not open input file");
+		exit(0);
+	}
+	return fp;
+}
+
+#endif /* IN_BUSYBOX */
+
+#endif /* _LIBBB_UDHCP_H */
diff --git a/networking/udhcp/options.c b/networking/udhcp/options.c
new file mode 100644
index 000000000..d394b4c39
--- /dev/null
+++ b/networking/udhcp/options.c
@@ -0,0 +1,172 @@
+/*
+ * options.c -- DHCP server option packet tools
+ * Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "common.h"
+#include "dhcpd.h"
+#include "options.h"
+#include "files.h"
+
+
+/* supported options are easily added here */
+struct dhcp_option dhcp_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},
+	{"nisdomain",	OPTION_STRING | OPTION_REQ,		0x28},
+	{"nissrv",	OPTION_IP | OPTION_LIST | OPTION_REQ,	0x29},
+	{"ntpsrv",	OPTION_IP | OPTION_LIST | OPTION_REQ,	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). */
+uint8_t *get_option(struct dhcpMessage *packet, int code)
+{
+	int i, length;
+	uint8_t *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(uint8_t *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(uint8_t *optionptr, uint8_t *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(uint8_t *optionptr, uint8_t code, uint32_t data)
+{
+	struct dhcp_option *dh;
+
+	for (dh=dhcp_options; dh->code; dh++) {
+		if (dh->code == code) {
+			uint8_t option[6], len;
+
+			option[OPT_CODE] = code;
+			len = option_lengths[dh->flags & TYPE_MASK];
+			option[OPT_LEN] = len;
+			if (__BYTE_ORDER == __BIG_ENDIAN)
+				data <<= 8 * (4 - len);
+			/* This memcpy is for broken processors which can't
+			 * handle a simple unaligned 32-bit assignment */
+			memcpy(&option[OPT_DATA], &data, 4);
+			return add_option_string(optionptr, option);
+		}
+	}
+
+	DEBUG(LOG_ERR, "Could not add option 0x%02x", code);
+	return 0;
+}
diff --git a/networking/udhcp/options.h b/networking/udhcp/options.h
new file mode 100644
index 000000000..4948bac00
--- /dev/null
+++ b/networking/udhcp/options.h
@@ -0,0 +1,38 @@
+/* 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;
+	uint8_t code;
+};
+
+extern struct dhcp_option dhcp_options[];
+extern int option_lengths[];
+
+uint8_t *get_option(struct dhcpMessage *packet, int code);
+int end_option(uint8_t *optionptr);
+int add_option_string(uint8_t *optionptr, uint8_t *string);
+int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data);
+
+#endif
diff --git a/networking/udhcp/packet.c b/networking/udhcp/packet.c
new file mode 100644
index 000000000..ae06d53cc
--- /dev/null
+++ b/networking/udhcp/packet.c
@@ -0,0 +1,207 @@
+#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) || defined _NEWLIB_VERSION
+#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 "common.h"
+#include "packet.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)
+{
+	static const char broken_vendors[][8] = {
+		"MSFT 98",
+		""
+	};
+	int bytes;
+	int i;
+	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] == (uint8_t) strlen(broken_vendors[i]) &&
+			    !strncmp((char*)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;
+}
+
+
+uint16_t checksum(void *addr, int count)
+{
+	/* Compute Internet Checksum for "count" bytes
+	 *         beginning at location "addr".
+	 */
+	register int32_t sum = 0;
+	uint16_t *source = (uint16_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 */
+		uint16_t tmp = 0;
+		*(uint8_t *) (&tmp) = * (uint8_t *) source;
+		sum += tmp;
+	}
+	/*  Fold 32-bit sum to 16 bits */
+	while (sum >> 16)
+		sum = (sum & 0xffff) + (sum >> 16);
+
+	return ~sum;
+}
+
+
+/* Construct a ip/udp header for a packet, and specify the source and dest hardware address */
+int raw_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
+		   uint32_t dest_ip, int dest_port, uint8_t *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: %m");
+		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: %m");
+		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: %m");
+	}
+	close(fd);
+	return result;
+}
+
+
+/* Let the kernel do all the work for packet generation */
+int kernel_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
+		   uint32_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) {
+		close(fd);
+		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) {
+		close(fd);
+		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) {
+		close(fd);
+		return -1;
+	}
+
+	result = write(fd, payload, sizeof(struct dhcpMessage));
+	close(fd);
+	return result;
+}
diff --git a/networking/udhcp/packet.h b/networking/udhcp/packet.h
new file mode 100644
index 000000000..f5859e824
--- /dev/null
+++ b/networking/udhcp/packet.h
@@ -0,0 +1,41 @@
+#ifndef _PACKET_H
+#define _PACKET_H
+
+#include <netinet/udp.h>
+#include <netinet/ip.h>
+
+struct dhcpMessage {
+	uint8_t op;
+	uint8_t htype;
+	uint8_t hlen;
+	uint8_t hops;
+	uint32_t xid;
+	uint16_t secs;
+	uint16_t flags;
+	uint32_t ciaddr;
+	uint32_t yiaddr;
+	uint32_t siaddr;
+	uint32_t giaddr;
+	uint8_t chaddr[16];
+	uint8_t sname[64];
+	uint8_t file[128];
+	uint32_t cookie;
+	uint8_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);
+uint16_t checksum(void *addr, int count);
+int raw_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
+		   uint32_t dest_ip, int dest_port, uint8_t *dest_arp, int ifindex);
+int kernel_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
+		   uint32_t dest_ip, int dest_port);
+
+
+#endif
diff --git a/networking/udhcp/pidfile.c b/networking/udhcp/pidfile.c
new file mode 100644
index 000000000..7a956fb47
--- /dev/null
+++ b/networking/udhcp/pidfile.c
@@ -0,0 +1,75 @@
+/* pidfile.c
+ *
+ * Functions to assist in the writing and removing of pidfiles.
+ *
+ * Russ Dill <Russ.Dill@asu.edu> September 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 <stdio.h>
+#include <stdlib.h>
+
+#include "common.h"
+#include "pidfile.h"
+
+static char *saved_pidfile;
+
+static void pidfile_delete(void)
+{
+	if (saved_pidfile) unlink(saved_pidfile);
+}
+
+
+int pidfile_acquire(const char *pidfile)
+{
+	int pid_fd;
+	if (!pidfile) return -1;
+
+	pid_fd = open(pidfile, O_CREAT | O_WRONLY, 0644);
+	if (pid_fd < 0) {
+		LOG(LOG_ERR, "Unable to open pidfile %s: %m\n", pidfile);
+	} else {
+		lockf(pid_fd, F_LOCK, 0);
+		if (!saved_pidfile)
+			atexit(pidfile_delete);
+		saved_pidfile = (char *) pidfile;
+	}
+
+	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);
+}
+
+
+
+
diff --git a/networking/udhcp/pidfile.h b/networking/udhcp/pidfile.h
new file mode 100644
index 000000000..ea97d1de5
--- /dev/null
+++ b/networking/udhcp/pidfile.h
@@ -0,0 +1,25 @@
+/* pidfile.h
+ *
+ * Functions to assist in the writing and removing of pidfiles.
+ *
+ * Russ Dill <Russ.Dill@asu.edu> September 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(const char *pidfile);
+void pidfile_write_release(int pid_fd);
+
diff --git a/networking/udhcp/samples/README b/networking/udhcp/samples/README
new file mode 100644
index 000000000..51721ea3c
--- /dev/null
+++ b/networking/udhcp/samples/README
@@ -0,0 +1,11 @@
+The files in this dir are:
+
+	udhcpd.conf: A sample udhpcd configuration file.
+	
+	sample.script
+	sample.nak
+	sample.deconfig
+	sample.bound
+	sample.renew	: sample scripts for the udhcpc client.
+	
+	simple.script	: a simple sample script for the client.
diff --git a/networking/udhcp/samples/sample.bound b/networking/udhcp/samples/sample.bound
new file mode 100755
index 000000000..200352672
--- /dev/null
+++ b/networking/udhcp/samples/sample.bound
@@ -0,0 +1,30 @@
+#!/bin/sh
+# Sample udhcpc renew script
+
+RESOLV_CONF="/etc/udhcpc/resolv.conf"
+
+[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
+[ -n "$subnet" ] && NETMASK="netmask $subnet"
+
+/sbin/ifconfig $interface $ip $BROADCAST $NETMASK
+
+if [ -n "$router" ]
+then
+	echo "deleting routers"
+	while /sbin/route del default gw 0.0.0.0 dev $interface
+	do :
+	done
+
+	for i in $router
+	do
+		/sbin/route add default gw $i dev $interface
+	done
+fi
+
+echo -n > $RESOLV_CONF
+[ -n "$domain" ] && echo domain $domain >> $RESOLV_CONF
+for i in $dns
+do
+	echo adding dns $i
+	echo nameserver $i >> $RESOLV_CONF
+done
\ No newline at end of file
diff --git a/networking/udhcp/samples/sample.deconfig b/networking/udhcp/samples/sample.deconfig
new file mode 100755
index 000000000..b221bcf12
--- /dev/null
+++ b/networking/udhcp/samples/sample.deconfig
@@ -0,0 +1,4 @@
+#!/bin/sh
+# Sample udhcpc deconfig script
+
+/sbin/ifconfig $interface 0.0.0.0
diff --git a/networking/udhcp/samples/sample.nak b/networking/udhcp/samples/sample.nak
new file mode 100755
index 000000000..f4d08e669
--- /dev/null
+++ b/networking/udhcp/samples/sample.nak
@@ -0,0 +1,4 @@
+#!/bin/sh
+# Sample udhcpc nak script
+
+echo Received a NAK: $message
diff --git a/networking/udhcp/samples/sample.renew b/networking/udhcp/samples/sample.renew
new file mode 100755
index 000000000..c953e9758
--- /dev/null
+++ b/networking/udhcp/samples/sample.renew
@@ -0,0 +1,30 @@
+#!/bin/sh
+# Sample udhcpc bound script
+
+RESOLV_CONF="/etc/udhcpc/resolv.conf"
+
+[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
+[ -n "$subnet" ] && NETMASK="netmask $subnet"
+
+/sbin/ifconfig $interface $ip $BROADCAST $NETMASK
+
+if [ -n "$router" ]
+then
+	echo "deleting routers"
+	while /sbin/route del default gw 0.0.0.0 dev $interface
+	do :
+	done
+
+	for i in $router
+	do
+		/sbin/route add default gw $i dev $interface
+	done
+fi
+
+echo -n > $RESOLV_CONF
+[ -n "$domain" ] && echo domain $domain >> $RESOLV_CONF
+for i in $dns
+do
+	echo adding dns $i
+	echo nameserver $i >> $RESOLV_CONF
+done
\ No newline at end of file
diff --git a/networking/udhcp/samples/sample.script b/networking/udhcp/samples/sample.script
new file mode 100644
index 000000000..9b717ac3c
--- /dev/null
+++ b/networking/udhcp/samples/sample.script
@@ -0,0 +1,7 @@
+#!/bin/sh
+# Currently, we only dispatch according to command.  However, a more
+# elaborate system might dispatch by command and interface or do some
+# common initialization first, especially if more dhcp event notifications
+# are added.
+
+exec /usr/share/udhcpc/sample.$1
diff --git a/networking/udhcp/samples/simple.script b/networking/udhcp/samples/simple.script
new file mode 100644
index 000000000..a52a7f812
--- /dev/null
+++ b/networking/udhcp/samples/simple.script
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+# udhcpc script edited by Tim Riker <Tim@Rikers.org>
+
+[ -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
diff --git a/networking/udhcp/samples/udhcpd.conf b/networking/udhcp/samples/udhcpd.conf
new file mode 100644
index 000000000..00105b3e5
--- /dev/null
+++ b/networking/udhcp/samples/udhcpd.conf
@@ -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
+#opt subnet
+#opt timezone
+#opt router
+#opt timesvr
+#opt namesvr
+#opt dns
+#opt logsvr
+#opt cookiesvr
+#opt lprsvr
+#opt bootsize
+#opt domain
+#opt swapsvr
+#opt rootpath
+#opt ipttl
+#opt mtu
+#opt broadcast
+#opt wins
+#opt lease
+#opt ntpsrv
+#opt tftp
+#opt bootfile
diff --git a/networking/udhcp/script.c b/networking/udhcp/script.c
new file mode 100644
index 000000000..b6b0e0d59
--- /dev/null
+++ b/networking/udhcp/script.c
@@ -0,0 +1,234 @@
+/* script.c
+ *
+ * Functions to call the DHCP client notification scripts
+ *
+ * Russ Dill <Russ.Dill@asu.edu> 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 "common.h"
+#include "options.h"
+#include "dhcpd.h"
+#include "dhcpc.h"
+#include "script.h"
+
+/* get a rough idea of how long an option will be (rounding up...) */
+static const 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 inline int upper_length(int length, int opt_index)
+{
+	return max_option_length[opt_index] *
+		(length / option_lengths[opt_index]);
+}
+
+
+static int sprintip(char *dest, char *pre, uint8_t *ip)
+{
+	return sprintf(dest, "%s%d.%d.%d.%d", pre, ip[0], ip[1], ip[2], ip[3]);
+}
+
+
+/* really simple implementation, just count the bits */
+static int mton(struct in_addr *mask)
+{
+	int i;
+	unsigned long bits = ntohl(mask->s_addr);
+	/* too bad one can't check the carry bit, etc in c bit
+	 * shifting */
+	for (i = 0; i < 32 && !((bits >> i) & 1); i++);
+	return 32 - i;
+}
+
+
+/* Fill dest with the text of option 'option'. */
+static void fill_options(char *dest, uint8_t *option, struct dhcp_option *type_p)
+{
+	int type, optlen;
+	uint16_t val_u16;
+	int16_t val_s16;
+	uint32_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;
+		dest += sprintf(dest, " ");
+	}
+}
+
+
+/* put all the parameters into an environment */
+static char **fill_envp(struct dhcpMessage *packet)
+{
+	int num_options = 0;
+	int i, j;
+	char **envp;
+	uint8_t *temp;
+	struct in_addr subnet;
+	char over = 0;
+
+	if (packet == NULL)
+		num_options = 0;
+	else {
+		for (i = 0; dhcp_options[i].code; i++)
+			if (get_option(packet, dhcp_options[i].code)) {
+				num_options++;
+				if (dhcp_options[i].code == DHCP_SUBNET)
+					num_options++; /* for mton */
+			}
+		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 = xcalloc(sizeof(char *), num_options + 5);
+	j = 0;
+	asprintf(&envp[j++], "interface=%s", client_config.interface);
+	asprintf(&envp[j++], "%s=%s", "PATH",
+		getenv("PATH") ? : "/bin:/usr/bin:/sbin:/usr/sbin");
+	asprintf(&envp[j++], "%s=%s", "HOME", getenv("HOME") ? : "/");
+
+	if (packet == NULL) return envp;
+
+	envp[j] = xmalloc(sizeof("ip=255.255.255.255"));
+	sprintip(envp[j++], "ip=", (uint8_t *) &packet->yiaddr);
+
+
+	for (i = 0; dhcp_options[i].code; i++) {
+		if (!(temp = get_option(packet, dhcp_options[i].code)))
+			continue;
+		envp[j] = xmalloc(upper_length(temp[OPT_LEN - 2],
+			dhcp_options[i].flags & TYPE_MASK) + strlen(dhcp_options[i].name) + 2);
+		fill_options(envp[j++], temp, &dhcp_options[i]);
+
+		/* Fill in a subnet bits option for things like /24 */
+		if (dhcp_options[i].code == DHCP_SUBNET) {
+			memcpy(&subnet, temp, 4);
+			asprintf(&envp[j++], "mask=%d", mton(&subnet));
+		}
+	}
+	if (packet->siaddr) {
+		envp[j] = xmalloc(sizeof("siaddr=255.255.255.255"));
+		sprintip(envp[j++], "siaddr=", (uint8_t *) &packet->siaddr);
+	}
+	if (!(over & FILE_FIELD) && packet->file[0]) {
+		/* watch out for invalid packets */
+		packet->file[sizeof(packet->file) - 1] = '\0';
+		asprintf(&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';
+		asprintf(&envp[j++], "sname=%s", packet->sname);
+	}
+	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, **curr;
+
+	if (client_config.script == NULL)
+		return;
+
+	DEBUG(LOG_INFO, "vforking and execle'ing %s", client_config.script);
+
+	envp = fill_envp(packet);
+	/* call script */
+	pid = vfork();
+	if (pid) {
+		waitpid(pid, NULL, 0);
+		for (curr = envp; *curr; curr++) free(*curr);
+		free(envp);
+		return;
+	} else if (pid == 0) {
+		/* close fd's? */
+
+		/* exec script */
+		execle(client_config.script, client_config.script,
+		       name, NULL, envp);
+		LOG(LOG_ERR, "script %s failed: %m", client_config.script);
+		exit(1);
+	}
+}
diff --git a/networking/udhcp/script.h b/networking/udhcp/script.h
new file mode 100644
index 000000000..71003311c
--- /dev/null
+++ b/networking/udhcp/script.h
@@ -0,0 +1,6 @@
+#ifndef _SCRIPT_H
+#define _SCRIPT_H
+
+extern void run_script(struct dhcpMessage *packet, const char *name);
+
+#endif
diff --git a/networking/udhcp/serverpacket.c b/networking/udhcp/serverpacket.c
new file mode 100644
index 000000000..fe880b4a0
--- /dev/null
+++ b/networking/udhcp/serverpacket.c
@@ -0,0 +1,275 @@
+/* serverpacket.c
+ *
+ * Construct and send DHCP server packets
+ *
+ * Russ Dill <Russ.Dill@asu.edu> 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 "common.h"
+#include "serverpacket.h"
+#include "dhcpd.h"
+#include "options.h"
+#include "static_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)
+{
+	uint8_t *chaddr;
+	uint32_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((char*)packet->sname, server_config.sname, sizeof(packet->sname) - 1);
+	if (server_config.boot_file)
+		strncpy((char*)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;
+	uint32_t req_align, lease_time_align = server_config.lease;
+	uint8_t *req, *lease_time;
+	struct option_set *curr;
+	struct in_addr addr;
+
+	uint32_t static_lease_ip;
+
+	init_packet(&packet, oldpacket, DHCPOFFER);
+
+	static_lease_ip = getIpByMac(server_config.static_leases, oldpacket->chaddr);
+
+	/* ADDME: if static, short circuit */
+	if(!static_lease_ip)
+	{
+	/* 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) &&
+
+			!static_lease_ip &&  /* Check that its not a static lease */
+			/* and is not already taken/offered */
+		   ((!(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 */
+	} else {
+			/* Is it a static lease? (No, because find_address skips static lease) */
+		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 */
+	else
+	{
+		/* It is a static lease... use it */
+		packet.yiaddr = static_lease_ip;
+	}
+
+	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, uint32_t yiaddr)
+{
+	struct dhcpMessage packet;
+	struct option_set *curr;
+	uint8_t *lease_time;
+	uint32_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);
+}
diff --git a/networking/udhcp/serverpacket.h b/networking/udhcp/serverpacket.h
new file mode 100644
index 000000000..902492895
--- /dev/null
+++ b/networking/udhcp/serverpacket.h
@@ -0,0 +1,12 @@
+#ifndef _SERVERPACKET_H
+#define _SERVERPACKET_H
+
+#include "packet.h"
+
+int sendOffer(struct dhcpMessage *oldpacket);
+int sendNAK(struct dhcpMessage *oldpacket);
+int sendACK(struct dhcpMessage *oldpacket, uint32_t yiaddr);
+int send_inform(struct dhcpMessage *oldpacket);
+
+
+#endif
diff --git a/networking/udhcp/signalpipe.c b/networking/udhcp/signalpipe.c
new file mode 100644
index 000000000..e973ff6b2
--- /dev/null
+++ b/networking/udhcp/signalpipe.c
@@ -0,0 +1,84 @@
+/* signalpipe.c
+ *
+ * Signal pipe infrastructure. A reliable way of delivering signals.
+ *
+ * Russ Dill <Russ.Dill@asu.edu> December 2003
+ *
+ * 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 <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/select.h>
+
+
+#include "signalpipe.h"
+#include "common.h"
+
+static int signal_pipe[2];
+
+static void signal_handler(int sig)
+{
+	if (send(signal_pipe[1], &sig, sizeof(sig), MSG_DONTWAIT) < 0)
+		DEBUG(LOG_ERR, "Could not send signal: %m");
+}
+
+
+/* Call this before doing anything else. Sets up the socket pair
+ * and installs the signal handler */
+void udhcp_sp_setup(void)
+{
+	socketpair(AF_UNIX, SOCK_STREAM, 0, signal_pipe);
+	fcntl(signal_pipe[0], F_SETFD, FD_CLOEXEC);
+	fcntl(signal_pipe[1], F_SETFD, FD_CLOEXEC);
+	signal(SIGUSR1, signal_handler);
+	signal(SIGUSR2, signal_handler);
+	signal(SIGTERM, signal_handler);
+}
+
+
+/* Quick little function to setup the rfds. Will return the
+ * max_fd for use with select. Limited in that you can only pass
+ * one extra fd */
+int udhcp_sp_fd_set(fd_set *rfds, int extra_fd)
+{
+	FD_ZERO(rfds);
+	FD_SET(signal_pipe[0], rfds);
+	if (extra_fd >= 0) {
+		fcntl(extra_fd, F_SETFD, FD_CLOEXEC);
+		FD_SET(extra_fd, rfds);
+	}
+	return signal_pipe[0] > extra_fd ? signal_pipe[0] : extra_fd;
+}
+
+
+/* Read a signal from the signal pipe. Returns 0 if there is
+ * no signal, -1 on error (and sets errno appropriately), and
+ * your signal on success */
+int udhcp_sp_read(fd_set *rfds)
+{
+	int sig;
+
+	if (!FD_ISSET(signal_pipe[0], rfds))
+		return 0;
+
+	if (read(signal_pipe[0], &sig, sizeof(sig)) < 0)
+		return -1;
+
+	return sig;
+}
diff --git a/networking/udhcp/signalpipe.h b/networking/udhcp/signalpipe.h
new file mode 100644
index 000000000..70c1e5715
--- /dev/null
+++ b/networking/udhcp/signalpipe.h
@@ -0,0 +1,22 @@
+/* signalpipe.h
+ *
+ * Russ Dill <Russ.Dill@asu.edu> December 2003
+ *
+ * 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.
+ */
+
+void udhcp_sp_setup(void);
+int udhcp_sp_fd_set(fd_set *rfds, int extra_fd);
+int udhcp_sp_read(fd_set *rfds);
diff --git a/networking/udhcp/socket.c b/networking/udhcp/socket.c
new file mode 100644
index 000000000..6417267ec
--- /dev/null
+++ b/networking/udhcp/socket.c
@@ -0,0 +1,135 @@
+/*
+ * socket.c -- DHCP server client/server socket creation
+ *
+ * udhcp client/server
+ * Copyright (C) 1999 Matthew Ramsay <matthewr@moreton.com.au>
+ *			Chris Trew <ctrew@moreton.com.au>
+ *
+ * Rewrite by Russ Dill <Russ.Dill@asu.edu> 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) || defined _NEWLIB_VERSION
+#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 "common.h"
+#include "socket.h"
+
+int read_interface(char *interface, int *ifindex, uint32_t *addr, uint8_t *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?: %m");
+				close(fd);
+				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!: %m");
+			close(fd);
+			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!: %m");
+			close(fd);
+			return -1;
+		}
+	} else {
+		LOG(LOG_ERR, "socket failed!: %m");
+		return -1;
+	}
+	close(fd);
+	return 0;
+}
+
+
+int listen_socket(uint32_t 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", ip, port, inf);
+	if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
+		DEBUG(LOG_ERR, "socket call failed: %m");
+		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_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;
+}
diff --git a/networking/udhcp/socket.h b/networking/udhcp/socket.h
new file mode 100644
index 000000000..66179d4f5
--- /dev/null
+++ b/networking/udhcp/socket.h
@@ -0,0 +1,8 @@
+/* socket.h */
+#ifndef _SOCKET_H
+#define _SOCKET_H
+
+int read_interface(char *interface, int *ifindex, uint32_t *addr, uint8_t *arp);
+int listen_socket(uint32_t ip, int port, char *inf);
+
+#endif
diff --git a/networking/udhcp/static_leases.c b/networking/udhcp/static_leases.c
new file mode 100644
index 000000000..1124d39de
--- /dev/null
+++ b/networking/udhcp/static_leases.c
@@ -0,0 +1,119 @@
+/*
+ * static_leases.c -- Couple of functions to assist with storing and
+ * retrieving data for static leases
+ *
+ * Wade Berrier <wberrier@myrealbox.com> September 2004
+ *
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "static_leases.h"
+#include "dhcpd.h"
+
+/* Takes the address of the pointer to the static_leases linked list,
+ *   Address to a 6 byte mac address
+ *   Address to a 4 byte ip address */
+int addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t *ip)
+{
+
+	struct static_lease *cur;
+	struct static_lease *new_static_lease;
+
+	/* Build new node */
+	new_static_lease = xmalloc(sizeof(struct static_lease));
+	new_static_lease->mac = mac;
+	new_static_lease->ip = ip;
+	new_static_lease->next = NULL;
+
+	/* If it's the first node to be added... */
+	if(*lease_struct == NULL)
+	{
+		*lease_struct = new_static_lease;
+	}
+	else
+	{
+		cur = *lease_struct;
+		while(cur->next != NULL)
+		{
+			cur = cur->next;
+		}
+
+		cur->next = new_static_lease;
+	}
+
+	return 1;
+
+}
+
+/* Check to see if a mac has an associated static lease */
+uint32_t getIpByMac(struct static_lease *lease_struct, void *arg)
+{
+	uint32_t return_ip;
+	struct static_lease *cur = lease_struct;
+	uint8_t *mac = arg;
+
+	return_ip = 0;
+
+	while(cur != NULL)
+	{
+		/* If the client has the correct mac  */
+		if(memcmp(cur->mac, mac, 6) == 0)
+		{
+			return_ip = *(cur->ip);
+		}
+
+		cur = cur->next;
+	}
+
+	return return_ip;
+
+}
+
+/* Check to see if an ip is reserved as a static ip */
+uint32_t reservedIp(struct static_lease *lease_struct, uint32_t ip)
+{
+	struct static_lease *cur = lease_struct;
+
+	uint32_t return_val = 0;
+
+	while(cur != NULL)
+	{
+		/* If the client has the correct ip  */
+		if(*cur->ip == ip)
+			return_val = 1;
+
+		cur = cur->next;
+	}
+
+	return return_val;
+
+}
+
+#ifdef UDHCP_DEBUG
+/* Print out static leases just to check what's going on */
+/* Takes the address of the pointer to the static_leases linked list */
+void printStaticLeases(struct static_lease **arg)
+{
+	/* Get a pointer to the linked list */
+	struct static_lease *cur = *arg;
+
+	while(cur != NULL)
+	{
+		/* printf("PrintStaticLeases: Lease mac Address: %x\n", cur->mac); */
+		printf("PrintStaticLeases: Lease mac Value: %x\n", *(cur->mac));
+		/* printf("PrintStaticLeases: Lease ip Address: %x\n", cur->ip); */
+		printf("PrintStaticLeases: Lease ip Value: %x\n", *(cur->ip));
+
+		cur = cur->next;
+	}
+
+
+}
+#endif
+
+
+
diff --git a/networking/udhcp/static_leases.h b/networking/udhcp/static_leases.h
new file mode 100644
index 000000000..d06520b23
--- /dev/null
+++ b/networking/udhcp/static_leases.h
@@ -0,0 +1,25 @@
+/* static_leases.h */
+#ifndef _STATIC_LEASES_H
+#define _STATIC_LEASES_H
+
+#include "dhcpd.h"
+
+/* Config file will pass static lease info to this function which will add it
+ * to a data structure that can be searched later */
+int addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t *ip);
+
+/* Check to see if a mac has an associated static lease */
+uint32_t getIpByMac(struct static_lease *lease_struct, void *arg);
+
+/* Check to see if an ip is reserved as a static ip */
+uint32_t reservedIp(struct static_lease *lease_struct, uint32_t ip);
+
+#ifdef UDHCP_DEBUG
+/* Print out static leases just to check what's going on */
+void printStaticLeases(struct static_lease **lease_struct);
+#endif
+
+#endif
+
+
+
diff --git a/networking/udhcp/udhcpc.8 b/networking/udhcp/udhcpc.8
new file mode 100644
index 000000000..752a736c0
--- /dev/null
+++ b/networking/udhcp/udhcpc.8
@@ -0,0 +1,208 @@
+.TH UDHCPC 8 2001-09-26 GNU/Linux "GNU/Linux Administrator's Manual"
+.SH NAME
+udhcpc \- very small DHCP client
+.SH SYNOPSIS
+.B udhcpc
+.RI [ OPTION ]...
+.SH DESCRIPTION
+The udhcp client negotiates a lease with the DHCP server and
+executes a script when it is obtained or lost.
+.SH OPTIONS
+.TP
+.BI \-c\  CLIENTID ,\ \-\-clientid= CLIENTID
+Send the client identifier
+.IR CLIENTID .
+.TP
+.BR -f ,\  \-\-foreground
+Do not fork after obtaining a lease.
+.TP
+.BI \-H\  HOSTNAME ,\ \-\-hostname= HOSTNAME
+Send the client hostname
+.IR HOSTNAME .
+.TP
+.BI \-h\  HOSTNAME
+Alias for -H
+.IR HOSTNAME .
+.TP
+.BI \-i\  INTERFACE ,\ \-\-interface= INTERFACE
+Configure
+.IR INTERFACE .
+.TP
+.BR -n ,\  \-\-now
+Exit with failure if a lease cannot be obtained.
+.TP
+.BI \-p\  FILE ,\ \-\-pidfile= FILE
+Write the process ID of the daemon to
+.IR FILE .
+.TP
+.BR -q ,\  \-\-quit
+Exit after obtaining a lease.
+.TP
+.BI \-r\  ADDRESS ,\ \-\-request= ADDRESS
+Request IP address
+.IR ADDRESS .
+.TP
+.BI \-s\  FILE ,\ \-\-script= FILE
+Use script
+.IR FILE .
+.TP
+.BR -v ,\  \-\-version
+Display version.
+.SH USAGE
+When an event occurs,
+.B udhcpc
+executes a script.  There are four possible arguments to this
+script:
+.TP
+.B deconfig
+.B deconfig
+is used when
+.B udhcpc
+starts, and when a lease is lost.  The script should put the
+interface in an up, but deconfigured, state.
+.TP
+.B bound
+.B bound
+is used when
+.B udhcpc
+moves from an unbound to a bound state.  The script should
+configure the interface and set any other relevant parameters
+(e.g., default gateway, dns server, etc.).
+.TP
+.B renew
+.B renew
+is used when
+.B udhcpc
+when a lease is renewed.  The interface is already
+configured, so the IP address will not change.  Other parameters
+(e.g., default gateway, subnet mask, dns server) may.
+.TP
+.B nak
+.B nak
+is used when
+.B udhcpc
+receieves a NAK packet from the server. The
+enviromental variable
+.B $message
+will contain the reason for the
+NAK message if the server included one. Processing this message
+is optional, as the script will also be called with deconfig if
+need be.
+.PP
+Parameters are passed to the script via the following environment
+variables:
+.TP
+.B HOME
+The inherited HOME, or "/" if it is unset.
+.TP
+.B PATH
+The inherited PATH, or "/bin:/usr/bin:/sbin:/usr/sbin" if it is
+unset.
+.TP
+.B interface
+The interface.
+.TP
+.B ip
+The client IP address.
+.TP
+.B siaddr
+The BOOTP next server option.
+.TP
+.B sname
+The BOOTP server name option.
+.TP
+.B boot_file
+The BOOTP boot file option.
+.TP
+.B subnet
+The subnet mask.
+.TP
+.B timezone
+The timezone offset from UTC in seconds.
+.TP
+.B router
+The list of routers.
+.TP
+.B timesvr
+The list of time servers.
+.TP
+.B namesvr
+The list of IEN 116 name servers.
+.TP
+.B dns
+The list of DNS servers.
+.TP
+.B logsvr
+The list of MIT-LCS UDP log servers.
+.TP
+.B cookiesvr
+The list of RFC 865 cookie servers.
+.TP
+.B lprsvr
+The list of LPR servers.
+.TP
+.B hostname
+The host name.
+.TP
+.B bootsize
+The length in 512-octet blocks of the bootfile.
+.TP
+.B domain
+The domain name of the network.
+.TP
+.B swapsvr
+The client's swap server.
+.TP
+.B rootpath
+The path of the client's root dist.
+.TP
+.B ipttl
+The TTL.
+.TP
+.B mtu
+The MTU.
+.TP
+.B broadcast
+The broadcast address.
+.TP
+.B ntpsrv
+The list of NTP servers.
+.TP
+.B wins
+The list of WINS servers.
+.TP
+.B lease
+The lease time in seconds.
+.TP
+.B dhcptype
+The DHCP message type (safely ignored).
+.TP
+.B serverid
+The server IP address.
+.TP
+.B message
+Reason for a DHCPNAK.
+.TP
+.B tftp
+The TFTP server name.
+.TP
+.B bootfile
+The bootfile name.
+.SH FILES
+.TP
+.I /usr/share/udhcpc/default.script
+Script run when leases are obtained or lost.
+.SH NOTES
+.B udhcpc
+responds to the following signals:
+.TP
+.B SIGUSR1
+This signal causes
+.B udhcpc
+to renew the current lease or, if it does not have one, obtain a
+new lease.
+.TP
+.B SIGUSR2
+This signal caused
+.B udhcpc
+to release the current lease.
diff --git a/networking/udhcp/udhcpd.8 b/networking/udhcp/udhcpd.8
new file mode 100644
index 000000000..be8fac888
--- /dev/null
+++ b/networking/udhcp/udhcpd.8
@@ -0,0 +1,17 @@
+.TH UDHCPD 8 2001-09-27 GNU/Linux "GNU/Linux Administrator's Manual"
+.SH NAME
+udhcpd \- very small DHCP server
+.SH SYNOPSIS
+.B udhcpd
+.SH DESCRIPTION
+The udhcp server negotiates leases with DHCP clients.
+.SH FILES
+.TP
+.I /etc/udhcpd.conf
+Configuration file.
+.TP
+.I /var/lib/misc/udhcpd.leases
+Lease information file.
+.SH SEE ALSO
+.BR dumpleases (1),
+.BR udhcpd.conf (8).
diff --git a/networking/udhcp/udhcpd.conf.5 b/networking/udhcp/udhcpd.conf.5
new file mode 100644
index 000000000..b86a9f51f
--- /dev/null
+++ b/networking/udhcp/udhcpd.conf.5
@@ -0,0 +1,164 @@
+.TH UDHCPD.CONF 5 2001-09-26 GNU/Linux "GNU/Linux Administrator's Manual"
+.SH NAME
+udhcpd.conf \- udhcp server configuration file
+.SH DESCRIPTION
+The file
+.I /etc/udhcpd.conf
+contains configuration information specific to the udhcp server.
+It should contain one configuration keyword per line, followed by
+appropriate configuration information.
+.SH OPTIONS
+.TP
+.BI start\  ADDRESS
+The starting address of the IP lease block is
+.IR ADDRESS .
+The default is
+.BR 192.168.0.20 .
+.TP
+.BI end\  ADDRESS
+The ending address of the IP lease block is
+.IR ADDRESS .
+The default is
+.BR 192.168.0.254 .
+.TP
+.BI interface\  INTERFACE
+The udhcp server should listen on
+.IR INTERFACE .
+The default is
+.BR eth0 .
+.TP
+.BI max_leases\  LEASES
+Offer at most
+.I LEASES
+leases (including those reserved by OFFERs, DECLINEs, and ARP
+conflicts).  The default is
+.BR 254 .
+.TP 
+.BI remaining\  REMAINING
+If
+.I REMAINING
+is
+.BR yes ,
+store the time remaining for each lease.  If it is
+.BR no ,
+store the expiration time for each lease.  The default is
+.BR yes .
+.TP
+.BI auto_time\  SECONDS
+Write the lease information to a file every
+.I SECONDS
+seconds.  The default is
+.BR 7200 .
+.TP
+.BI decline_time\  SECONDS
+Reserve an IP for
+.I SECONDS
+seconds if a DHCP decline message is received.  The default is
+.BR 3600 .
+.TP
+.BI conflict_time\  SECONDS
+Reserve an IP for
+.I SECONDS
+seconds if an ARP conflict occurs.  The default is
+.BR 3600 .
+.TP
+.BI offer_time\  SECONDS
+Reserve an IP for
+.I SECONDS
+seconds if it is offered.  The default is
+.BR 60 .
+.TP
+.BI min_lease\  SECONDS
+Reserve an IP for the full lease time if the lease to be given is less than
+.I SECONDS
+seconds.  The default is
+.BR 60 .
+.TP
+.BI lease_file\  FILE
+Write the lease information to
+.IR FILE .
+The default is
+.BR /var/lib/misc/udhcpd.leases .
+.TP
+.BI pidfile\  FILE
+Write the process ID to
+.IR FILE .
+The default is
+.BR /var/run/udhcpd.pid .
+.TP
+.BI notify_file\  FILE
+Execute
+.I FILE
+after the lease information is written.  By default, no file is executed.
+.TP
+.BI siaddr\  ADDRESS
+BOOTP specific option.  The default is
+.BR 0.0.0.0 .
+.TP
+.BI sname\  NAME
+BOOTP specific option.  There is no default.
+.TP
+.BI boot_file\  FILE
+BOOTP specific option.  There is no default.
+.TP
+.BI option\  OPTION
+DHCP specific option.
+.RS
+.TP
+.BI subnet\  ADDRESS
+.TP
+.BI timezone\  OFFSET
+.TP
+.BI router\  ADDRESS...
+.TP
+.BI timesvr\  ADDRESS...
+.TP
+.BI namesvr\  ADDRESS...
+.TP
+.BI dns\  ADDRESS...
+.TP
+.BI logsvr\  ADDRESS...
+.TP
+.BI cookiesvr\  ADDRESS...
+.TP
+.BI lprsvr\  ADDRESS...
+.TP
+.BI hostname\  HOSTNAME
+.TP
+.BI bootsize\  SIZE
+.TP
+.BI domain\  DOMAIN
+.TP
+.BI swapsvr\  ADDRESS
+.TP
+.BI rootpath\  PATH
+.TP
+.BI ipttl\  TTL
+.TP
+.BI mtu\  MTU
+.TP
+.BI broadcast\  ADDRESS
+.TP
+.BI ntpsrv\  ADDRESS...
+.TP
+.BI wins\  ADDRESS...
+.TP
+.BI requestip\  ADDRESS
+.TP
+.BI lease\  SECONDS
+.TP
+.BI dhcptype\  TYPE
+.TP
+.BI serverid\  ADDRESS
+.TP
+.BI tftp\  FILE
+.TP
+.BI bootfile\  FILE
+The default for
+.B lease
+is
+.BR 864000 .
+There are no defaults for the other options.
+.RE
+.SH SEE ALSO
+.BR udhcpd (8).
diff --git a/networking/udhcp/version.h b/networking/udhcp/version.h
new file mode 100644
index 000000000..3862539f5
--- /dev/null
+++ b/networking/udhcp/version.h
@@ -0,0 +1,6 @@
+#ifndef _UDHCP_VERSION_H
+#define _UDHCP_VERSION_H
+
+#define VERSION "0.9.9-pre"
+
+#endif