imported original firmware WRT54GL_v4.30.11_11_US

43 files changed, 4495 insertions, 0 deletions

diff --git a/release/src/router/busybox/networking/udhcp/AUTHORS b/release/src/router/busybox/networking/udhcp/AUTHORS
new file mode 100755
index 00000000..3772aedb
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/AUTHORS
@@ -0,0 +1,14 @@
+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/)
+Lineo		(http://opensource.lineo.com)
+Vladimir Oleynik <dzo@simtrea.ru>, optimize and more integrate for busybox
+
+
diff --git a/release/src/router/busybox/networking/udhcp/COPYING b/release/src/router/busybox/networking/udhcp/COPYING
new file mode 100755
index 00000000..a43ea212
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/COPYING
@@ -0,0 +1,339 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                          675 Mass Ave, Cambridge, MA 02139, USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	Appendix: How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) 19yy  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) 19yy name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
diff --git a/release/src/router/busybox/networking/udhcp/ChangeLog b/release/src/router/busybox/networking/udhcp/ChangeLog
new file mode 100755
index 00000000..9ee97534
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/ChangeLog
@@ -0,0 +1,262 @@
+0.9.10
+  Size optimization (over 3k), more busybox integration
+  (Vladimir Oleynik <dzo@simtreas.ru>
+
+0.9.9 (pending)
++ 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@optushome.com.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 <andersen@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/release/src/router/busybox/networking/udhcp/Config.in b/release/src/router/busybox/networking/udhcp/Config.in
new file mode 100755
index 00000000..a3223de9
--- /dev/null
+++ b/release/src/router/busybox/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 leases 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/release/src/router/busybox/networking/udhcp/Makefile b/release/src/router/busybox/networking/udhcp/Makefile
new file mode 100644
index 00000000..ee34d48f
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/Makefile
@@ -0,0 +1,30 @@
+# Makefile for busybox
+#
+# Copyright (C) 1999-2003 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
+#
+
+TOPDIR:= ../../
+UDHCP_DIR:=./
+include $(TOPDIR).config
+include $(TOPDIR)Rules.mak
+include Makefile.in
+all: $(libraries-y)
+-include $(TOPDIR).depend
+
+clean:
+	rm -f *.o *.a $(AR_TARGET)
+
diff --git a/release/src/router/busybox/networking/udhcp/Makefile.in b/release/src/router/busybox/networking/udhcp/Makefile.in
new file mode 100755
index 00000000..502aa1c3
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/Makefile.in
@@ -0,0 +1,61 @@
+# Makefile for busybox
+#
+# Copyright (C) 1999-2003 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
+#
+
+UDHCP_AR:=udhcp.a
+ifndef $(UDHCP_DIR)
+UDHCP_DIR:=$(TOPDIR)networking/udhcp/
+endif
+
+#ok, so I forgot how to do an or, but this is a quick and dirty hack
+ifeq ($(CONFIG_UDHCPC), y)
+CONFIG_UDHCP_SHARED=y
+else
+ifeq ($(CONFIG_UDHCPD), y)
+CONFIG_UDHCP_SHARED=y
+else
+CONFIG_UDHCP_SHARED=n
+endif
+endif
+
+ifeq ($(CONFIG_UDHCPD), y)
+CONFIG_UDHCP_LEASES_FILE=y
+else
+ifeq ($(CONFIG_UDHCPD), y)
+CONFIG_UDHCP_LEASES_FILE=y
+else
+CONFIG_UDHCP_LEASES_FILE=n
+endif
+endif
+
+UDHCP-y:=
+UDHCP-$(CONFIG_UDHCP_SHARED)    += options.c socket.c packet.c common.c
+UDHCP-$(CONFIG_UDHCPC)		+= dhcpc.c clientpacket.c script.c
+UDHCP-$(CONFIG_UDHCPD)		+= dhcpd.c arpping.c files.c leases.c serverpacket.c
+UDHCP-$(CONFIG_DUMPLEASES)	+= dumpleases.c
+UDHCP-$(CONFIG_UDHCP_LEASES_FILE) += leases_file.c
+UDHCP_OBJS=$(patsubst %.c,$(UDHCP_DIR)%.o, $(UDHCP-y))
+
+libraries-y+=$(UDHCP_DIR)$(UDHCP_AR)
+
+$(UDHCP_DIR)$(UDHCP_AR): $(UDHCP_OBJS)
+	$(AR) -ro $@ $(UDHCP_OBJS)
+
+$(UDHCP_OBJS): %.o : %.c
+	$(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c $< -o $@
+
diff --git a/release/src/router/busybox/networking/udhcp/README b/release/src/router/busybox/networking/udhcp/README
new file mode 100644
index 00000000..5f4bb78a
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/README
@@ -0,0 +1,50 @@
+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:
+	
+	DEBUG: If DEBUG is defined, udhcpd will output extra debugging
+	output, compile with -g, and not fork to the background when run.
+	SYSLOG: If SYSLOG is defined, udhcpd will log all its messages
+	syslog, otherwise, it will attempt to log them to stdout.
+	
+	COMBINED_BINARY: If COMBINED_BINARY is define, one binary, udhcpd,
+	is created. If called as udhcpd, the dhcp server will be started.
+	If called as udhcpc, the dhcp client will be started.
+	
+dhcpd.h contains the other two compile time options:
+	
+	LEASE_TIME: The default lease time if not specified in the config
+	file.
+	
+	DHCPD_CONFIG_FILE: The defualt config file to use.
+	
+options.c contains a set of dhcp options for the client:
+
+	name[10]: The name of the option as it will appear in scripts
+	
+	flags: The type of option, as well as if it will be requested
+	by the client (OPTION_REQ)
+
+	code: The DHCP code for this option
+
+
+busybox drop-in
+--------------
+udhcp is now a drop-in component for busybox (http://busybox.net).
+To update busybox to the latest revision, simply do a:
+
+cp *.[ch] README AUTHORS COPYING ChangeLog TODO \ 
+	<busybox_source>/networking/udhcp
+
+The only two files udhcp does not provide are config.in and
+Makefile.in, so these may need to be updated from time to time.
+
diff --git a/release/src/router/busybox/networking/udhcp/README.dumpleases b/release/src/router/busybox/networking/udhcp/README.dumpleases
new file mode 100755
index 00000000..6367710c
--- /dev/null
+++ b/release/src/router/busybox/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/release/src/router/busybox/networking/udhcp/README.udhcpc b/release/src/router/busybox/networking/udhcp/README.udhcpc
new file mode 100755
index 00000000..8aee9814
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/README.udhcpc
@@ -0,0 +1,141 @@
+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         Client identifier
+-H, --hostname=HOSTNAME         Client hostname
+-h,				Alias for -H
+-f, --foreground                Do not fork after getting lease
+-b, --background                Fork to background if lease cannot be
+                                immediately negotiated.
+-i, --interface=INTERFACE       Interface to use (default: eth0)
+-n, --now                       Exit with failure if lease cannot be
+                                immediately negotiated.
+-p, --pidfile=file              Store process ID of daemon in file
+-q, --quit                      Quit after obtaining lease
+-r, --request=IP                IP address to request (default: none)
+-s, --script=file               Run file at dhcp events (default:
+                                /usr/share/udhcpc/default.script)
+-v, --version                   Display version
+
+
+If the requested IP address cannot be obtained, the client accepts the
+address that the server offers.
+
+
+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/release/src/router/busybox/networking/udhcp/README.udhcpd b/release/src/router/busybox/networking/udhcp/README.udhcpd
new file mode 100755
index 00000000..bc6137de
--- /dev/null
+++ b/release/src/router/busybox/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/release/src/router/busybox/networking/udhcp/TODO b/release/src/router/busybox/networking/udhcp/TODO
new file mode 100755
index 00000000..f88694a8
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/TODO
@@ -0,0 +1,14 @@
+TODO
+----
++ 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
++ Additional bootp support in client/server
++ Make serverid option in server configurable
++ Possibly add failure message to DHCP NAK
diff --git a/release/src/router/busybox/networking/udhcp/arpping.c b/release/src/router/busybox/networking/udhcp/arpping.c
new file mode 100644
index 00000000..e20395a9
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/arpping.c
@@ -0,0 +1,102 @@
+/*
+ * 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(u_int32_t yiaddr, u_int32_t ip, unsigned char *mac, char *interface)
+{
+
+	int	timeout = 2;
+	int 	optval = 1;
+	int	s;			/* socket */
+	int	rv = 1;			/* return value */
+	struct sockaddr addr;		/* for interface name */
+	struct arpMsg	arp;
+	fd_set		fdset;
+	struct timeval	tm;
+	time_t		prevTime;
+
+
+	if ((s = socket (PF_PACKET, SOCK_PACKET, htons(ETH_P_ARP))) == -1) {
+		LOG(LOG_ERR, bb_msg_can_not_create_raw_socket);
+		return -1;
+	}
+	
+	if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &optval, sizeof(optval)) == -1) {
+		LOG(LOG_ERR, "Could not setsocketopt on raw socket");
+		close(s);
+		return -1;
+	}
+
+	/* send arp request */
+	memset(&arp, 0, sizeof(arp));
+	memcpy(arp.ethhdr.h_dest, MAC_BCAST_ADDR, 6);	/* MAC DA */
+	memcpy(arp.ethhdr.h_source, mac, 6);		/* MAC SA */
+	arp.ethhdr.h_proto = htons(ETH_P_ARP);		/* protocol type (Ethernet) */
+	arp.htype = htons(ARPHRD_ETHER);		/* hardware type */
+	arp.ptype = htons(ETH_P_IP);			/* protocol type (ARP message) */
+	arp.hlen = 6;					/* hardware address length */
+	arp.plen = 4;					/* protocol address length */
+	arp.operation = htons(ARPOP_REQUEST);		/* ARP op code */
+	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;
+	time(&prevTime);
+	while (timeout > 0) {
+		FD_ZERO(&fdset);
+		FD_SET(s, &fdset);
+		tm.tv_sec = timeout;
+		if (select(s + 1, &fdset, (fd_set *) NULL, (fd_set *) NULL, &tm) < 0) {
+			DEBUG(LOG_ERR, "Error on ARPING request: %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) && 
+			    bcmp(arp.tHaddr, mac, 6) == 0 && 
+			    *((u_int *) arp.sInaddr) == yiaddr) {
+				DEBUG(LOG_INFO, "Valid arp reply receved for this address");
+				rv = 0;
+				break;
+			}
+		}
+		timeout -= time(NULL) - prevTime;
+		time(&prevTime);
+	}
+	close(s);
+	DEBUG(LOG_INFO, "%salid arp replies for this address", rv ? "No v" : "V");	 
+	return rv;
+}
diff --git a/release/src/router/busybox/networking/udhcp/arpping.h b/release/src/router/busybox/networking/udhcp/arpping.h
new file mode 100644
index 00000000..92b828db
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/arpping.h
@@ -0,0 +1,30 @@
+/*
+ * arpping .h
+ */
+
+#ifndef ARPPING_H
+#define ARPPING_H
+
+#include <netinet/if_ether.h>
+#include <net/if_arp.h>
+#include <net/if.h>
+#include <netinet/in.h>
+
+struct arpMsg {
+	struct ethhdr ethhdr;	 		/* Ethernet header */
+	u_short htype;				/* hardware type (must be ARPHRD_ETHER) */
+	u_short ptype;				/* protocol type (must be ETH_P_IP) */
+	u_char  hlen;				/* hardware address length (must be 6) */
+	u_char  plen;				/* protocol address length (must be 4) */
+	u_short operation;			/* ARP opcode */
+	u_char  sHaddr[6];			/* sender's hardware address */
+	u_char  sInaddr[4];			/* sender's IP address */
+	u_char  tHaddr[6];			/* target's hardware address */
+	u_char  tInaddr[4];			/* target's IP address */
+	u_char  pad[18];			/* pad for min. Ethernet payload (60 bytes) */
+};
+
+/* function prototypes */
+int arpping(u_int32_t yiaddr, u_int32_t ip, unsigned char *arp, char *interface);
+
+#endif
diff --git a/release/src/router/busybox/networking/udhcp/clientpacket.c b/release/src/router/busybox/networking/udhcp/clientpacket.c
new file mode 100644
index 00000000..7debac2e
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/clientpacket.c
@@ -0,0 +1,247 @@
+/* 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
+#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 "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)
+{
+	struct vendor  {
+		char vendor, length;
+		char str[sizeof("udhcp "VERSION)];
+	} vendor_id = { DHCP_VENDOR,  sizeof("udhcp "VERSION) - 1, "udhcp "VERSION};
+	
+	init_header(packet, type);
+	memcpy(packet->chaddr, client_config.arp, 6);
+	add_option_string(packet->options, client_config.clientid);
+	if (client_config.hostname) add_option_string(packet->options, client_config.hostname);
+	add_option_string(packet->options, (unsigned char *) &vendor_id);
+}
+
+
+/* Add a paramater request list for stubborn DHCP servers. Pull the data
+ * from the struct in options.c. Don't do bounds checking here because it
+ * goes towards the head of the packet. */
+static void add_requests(struct dhcpMessage *packet)
+{
+	int end = end_option(packet->options);
+	int i, len = 0;
+
+	packet->options[end + OPT_CODE] = DHCP_PARAM_REQ;
+	for (i = 0; options[i].code; i++)
+		if (options[i].flags & OPTION_REQ)
+			packet->options[end + OPT_DATA + len++] = options[i].code;
+	packet->options[end + OPT_LEN] = len;
+	packet->options[end + OPT_DATA + len] = DHCP_END;
+
+}
+
+
+/* Broadcast a DHCP discover packet to the network, with an optionally requested IP */
+int send_discover(unsigned long xid, unsigned long requested)
+{
+	struct dhcpMessage packet;
+
+	init_packet(&packet, DHCPDISCOVER);
+	packet.xid = xid;
+	if (requested)
+		add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
+
+	add_requests(&packet);
+	LOG(LOG_DEBUG, "Sending discover...");
+	return raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST, 
+				SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
+}
+
+
+/* Broadcasts a DHCP request message */
+int send_selecting(unsigned long xid, unsigned long server, unsigned long requested)
+{
+	struct dhcpMessage packet;
+	struct in_addr addr;
+
+	init_packet(&packet, DHCPREQUEST);
+	packet.xid = xid;
+
+	add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
+	add_simple_option(packet.options, DHCP_SERVER_ID, server);
+	
+	add_requests(&packet);
+	addr.s_addr = requested;
+	LOG(LOG_DEBUG, "Sending select for %s...", inet_ntoa(addr));
+	return raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST, 
+				SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
+}
+
+
+/* Unicasts or broadcasts a DHCP renew message */
+int send_renew(unsigned long xid, unsigned long server, unsigned long ciaddr)
+{
+	struct dhcpMessage packet;
+	int ret = 0;
+
+	init_packet(&packet, DHCPREQUEST);
+	packet.xid = xid;
+	packet.ciaddr = ciaddr;
+
+	add_requests(&packet);
+	LOG(LOG_DEBUG, "Sending renew...");
+	if (server) 
+		ret = kernel_packet(&packet, ciaddr, CLIENT_PORT, server, SERVER_PORT);
+	else ret = raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
+				SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
+	return ret;
+}	
+
+
+/* Unicasts a DHCP release message */
+int send_release(unsigned long server, unsigned long ciaddr)
+{
+	struct dhcpMessage packet;
+
+	init_packet(&packet, DHCPRELEASE);
+	packet.xid = random_xid();
+	packet.ciaddr = ciaddr;
+	
+	add_simple_option(packet.options, DHCP_REQUESTED_IP, ciaddr);
+	add_simple_option(packet.options, DHCP_SERVER_ID, server);
+
+	LOG(LOG_DEBUG, "Sending release...");
+	return kernel_packet(&packet, ciaddr, CLIENT_PORT, server, SERVER_PORT);
+}
+
+
+/* return -1 on errors that are fatal for the socket, -2 for those that aren't */
+int get_raw_packet(struct dhcpMessage *payload, int fd)
+{
+	int bytes;
+	struct udp_dhcp_packet packet;
+	u_int32_t source, dest;
+	u_int16_t check;
+
+	memset(&packet, 0, sizeof(struct udp_dhcp_packet));
+	bytes = read(fd, &packet, sizeof(struct udp_dhcp_packet));
+	if (bytes < 0) {
+		DEBUG(LOG_INFO, "couldn't read on raw listening socket -- ignoring");
+		usleep(500000); /* possible down interface, looping condition */
+		return -1;
+	}
+	
+	if (bytes < (int) (sizeof(struct iphdr) + sizeof(struct udphdr))) {
+		DEBUG(LOG_INFO, "message too short, ignoring");
+		return -2;
+	}
+	
+	if (bytes < ntohs(packet.ip.tot_len)) {
+		DEBUG(LOG_INFO, "Truncated packet");
+		return -2;
+	}
+	
+	/* ignore any extra garbage bytes */
+	bytes = ntohs(packet.ip.tot_len);
+	
+	/* Make sure its the right packet for us, and that it passes sanity checks */
+	if (packet.ip.protocol != IPPROTO_UDP || packet.ip.version != IPVERSION ||
+	    packet.ip.ihl != sizeof(packet.ip) >> 2 || packet.udp.dest != htons(CLIENT_PORT) ||
+	    bytes > (int) sizeof(struct udp_dhcp_packet) ||
+	    ntohs(packet.udp.len) != (short) (bytes - sizeof(packet.ip))) {
+	    	DEBUG(LOG_INFO, "unrelated/bogus packet");
+	    	return -2;
+	}
+
+	/* check IP checksum */
+	check = packet.ip.check;
+	packet.ip.check = 0;
+	if (check != checksum(&(packet.ip), sizeof(packet.ip))) {
+		DEBUG(LOG_INFO, "bad IP header checksum, ignoring");
+		return -1;
+	}
+	
+	/* verify the UDP checksum by replacing the header with a psuedo header */
+	source = packet.ip.saddr;
+	dest = packet.ip.daddr;
+	check = packet.udp.check;
+	packet.udp.check = 0;
+	memset(&packet.ip, 0, sizeof(packet.ip));
+
+	packet.ip.protocol = IPPROTO_UDP;
+	packet.ip.saddr = source;
+	packet.ip.daddr = dest;
+	packet.ip.tot_len = packet.udp.len; /* cheat on the psuedo-header */
+	if (check && check != checksum(&packet, bytes)) {
+		DEBUG(LOG_ERR, "packet with bad UDP checksum received, ignoring");
+		return -2;
+	}
+	
+	memcpy(payload, &(packet.data), bytes - (sizeof(packet.ip) + sizeof(packet.udp)));
+	
+	if (ntohl(payload->cookie) != DHCP_MAGIC) {
+		LOG(LOG_ERR, "received bogus message (bad magic) -- ignoring");
+		return -2;
+	}
+	DEBUG(LOG_INFO, "oooooh!!! got some!");
+	return bytes - (sizeof(packet.ip) + sizeof(packet.udp));
+	
+}
diff --git a/release/src/router/busybox/networking/udhcp/clientpacket.h b/release/src/router/busybox/networking/udhcp/clientpacket.h
new file mode 100644
index 00000000..2a6facbc
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/clientpacket.h
@@ -0,0 +1,12 @@
+#ifndef _CLIENTPACKET_H
+#define _CLIENTPACKET_H
+
+unsigned long random_xid(void);
+int send_discover(unsigned long xid, unsigned long requested);
+int send_selecting(unsigned long xid, unsigned long server, unsigned long requested);
+int send_renew(unsigned long xid, unsigned long server, unsigned long ciaddr);
+int send_renew(unsigned long xid, unsigned long server, unsigned long ciaddr);
+int send_release(unsigned long server, unsigned long ciaddr);
+int get_raw_packet(struct dhcpMessage *payload, int fd);
+
+#endif
diff --git a/release/src/router/busybox/networking/udhcp/common.c b/release/src/router/busybox/networking/udhcp/common.c
new file mode 100644
index 00000000..c01cd576
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/common.c
@@ -0,0 +1,150 @@
+/* common.c
+ *
+ * Functions to assist in the writing and removing of pidfiles.
+ *
+ * Russ Dill <Russ.Dill@asu.edu> Soptember 2001
+ * Rewrited 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.
+ */
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <sys/socket.h>
+
+#include "common.h"
+
+
+static int daemonized;
+
+#ifdef CONFIG_FEATURE_UDHCP_SYSLOG
+
+void udhcp_logging(int level, const char *fmt, ...)
+{
+	int e = errno;
+	va_list p;
+	va_list p2;
+
+	va_start(p, fmt);
+	__va_copy(p2, p);
+	if(!daemonized) {
+		vprintf(fmt, p);
+		putchar('\n');
+		errno = e;
+	}
+	vsyslog(level, fmt, p2);
+	va_end(p);
+}
+
+void start_log(const char *client_server)
+{
+	openlog(bb_applet_name, LOG_PID | LOG_CONS, LOG_LOCAL0);
+	udhcp_logging(LOG_INFO, "%s (v%s) started", client_server, VERSION);
+}
+
+#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, ...)
+{
+	int e = errno;
+	va_list p;
+
+	va_start(p, fmt);
+	if(!daemonized) {
+		printf("%s, ", syslog_level_msg[level]);
+		errno = e;
+		vprintf(fmt, p);
+		putchar('\n');
+	}
+	va_end(p);
+}
+
+void start_log(const char *client_server)
+{
+	udhcp_logging(LOG_INFO, "%s (v%s) started", client_server, VERSION);
+}
+#endif
+
+static const char *saved_pidfile;
+
+static void exit_fun(void)
+{
+	if (saved_pidfile) unlink(saved_pidfile);
+}
+
+void background(const char *pidfile)
+{
+	int pid_fd = -1;
+
+	if (pidfile) {
+		pid_fd = open(pidfile, O_CREAT | O_WRONLY, 0644);
+		if (pid_fd < 0) {
+			LOG(LOG_ERR, "Unable to open pidfile %s: %m", pidfile);
+		} else {
+			lockf(pid_fd, F_LOCK, 0);
+			if(!saved_pidfile)
+				atexit(exit_fun);       /* set atexit one only */
+			saved_pidfile = pidfile;        /* but may be rewrite */
+		}
+	}
+	while (pid_fd >= 0 && pid_fd < 3) pid_fd = dup(pid_fd); /* don't let daemon close it */
+	if (daemon(0, 0) == -1) {
+		perror("fork");
+		exit(1);
+	}
+	daemonized++;
+	if (pid_fd >= 0) {
+		FILE *out;
+
+		if ((out = fdopen(pid_fd, "w")) != NULL) {
+			fprintf(out, "%d\n", getpid());
+			fclose(out);
+		}
+		lockf(pid_fd, F_UNLCK, 0);
+		close(pid_fd);
+	}
+}
+
+/* Signal handler */
+int udhcp_signal_pipe[2];
+static void signal_handler(int sig)
+{
+	if (send(udhcp_signal_pipe[1], &sig, sizeof(sig), MSG_DONTWAIT) < 0) {
+		LOG(LOG_ERR, "Could not send signal: %m");
+	}
+}
+
+void udhcp_set_signal_pipe(int sig_add)
+{
+	socketpair(AF_UNIX, SOCK_STREAM, 0, udhcp_signal_pipe);
+	signal(SIGUSR1, signal_handler);
+	signal(SIGTERM, signal_handler);
+	if(sig_add)
+		signal(sig_add, signal_handler);
+}
diff --git a/release/src/router/busybox/networking/udhcp/common.h b/release/src/router/busybox/networking/udhcp/common.h
new file mode 100644
index 00000000..768f551b
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/common.h
@@ -0,0 +1,52 @@
+/* common.h
+ *
+ * Russ Dill <Russ.Dill@asu.edu> Soptember 2001
+ * Rewrited 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.
+ */
+
+#include "version.h"
+#include "busybox.h"
+
+#ifndef CONFIG_FEATURE_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
+
+void start_log(const char *client_server);
+void background(const char *pidfile);
+void udhcp_logging(int level, const char *fmt, ...);
+
+extern int udhcp_signal_pipe[2];
+void udhcp_set_signal_pipe(int sig_add);
+
+
+#define LOG(level, str, args...) udhcp_logging(level, str, ## args)
+
+#ifdef CONFIG_FEATURE_UDHCP_DEBUG
+# define DEBUG(level, str, args...) udhcp_logging(level, str, ## args)
+#else
+# define DEBUG(level, str, args...) do {;} while(0)
+#endif
diff --git a/release/src/router/busybox/networking/udhcp/debug.h b/release/src/router/busybox/networking/udhcp/debug.h
new file mode 100644
index 00000000..a1e19741
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/debug.h
@@ -0,0 +1,41 @@
+#ifndef _DEBUG_H
+#define _DEBUG_H
+
+#include "libbb_udhcp.h"
+
+#include <stdio.h>
+#ifdef SYSLOG
+#include <syslog.h>
+#endif
+
+
+#ifdef SYSLOG
+# define LOG(level, str, args...) do { printf(str, ## args); \
+				printf("\n"); \
+				syslog(level, str, ## args); } while(0)
+# define OPEN_LOG(name) openlog(name, 0, 0)
+#define CLOSE_LOG() closelog()
+#else
+# define LOG_EMERG	"EMERGENCY!"
+# define LOG_ALERT	"ALERT!"
+# define LOG_CRIT	"critical!"
+# define LOG_WARNING	"warning"
+# define LOG_ERR	"error"
+# define LOG_INFO	"info"
+# define LOG_DEBUG	"debug"
+# define LOG(level, str, args...) do { printf("%s, ", level); \
+				printf(str, ## args); \
+				printf("\n"); } while(0)
+# define OPEN_LOG(name) do {;} while(0)
+#define CLOSE_LOG() do {;} while(0)
+#endif
+
+#ifdef DEBUG
+# undef DEBUG
+# define DEBUG(level, str, args...) LOG(level, str, ## args)
+# define DEBUGGING
+#else
+# define DEBUG(level, str, args...) do {;} while(0)
+#endif
+
+#endif
diff --git a/release/src/router/busybox/networking/udhcp/dhcpc.c b/release/src/router/busybox/networking/udhcp/dhcpc.c
new file mode 100644
index 00000000..d18cb423
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/dhcpc.c
@@ -0,0 +1,492 @@
+/* dhcpc.c
+ *
+ * udhcp 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 <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 "dhcpd.h"
+#include "dhcpc.h"
+#include "options.h"
+#include "clientpacket.h"
+#include "script.h"
+#include "socket.h"
+#include "common.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;
+
+#ifdef CONFIG_INSTALL_NO_USR
+#define DEFAULT_SCRIPT	"/share/udhcpc/default.script"
+#else
+#define DEFAULT_SCRIPT	"/usr/share/udhcpc/default.script"
+#endif
+
+struct client_config_t client_config = {
+	/* Default options. */
+	abort_if_no_lease: 0,
+	foreground: 0,
+	quit_after_lease: 0,
+	background_if_no_lease: 0,
+	interface: "eth0",
+	pidfile: NULL,
+	script: DEFAULT_SCRIPT,
+	clientid: NULL,
+	hostname: NULL,
+	ifindex: 0,
+	arp: "\0\0\0\0\0\0",		/* appease gcc-3.0 */
+};
+
+/* 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;
+}
+
+
+int udhcpc_main(int argc, char *argv[])
+{
+	unsigned char *temp, *message;
+	unsigned long t1 = 0, t2 = 0, xid = 0;
+	unsigned long start = 0, lease;
+	fd_set rfds;
+	int retval;
+	struct timeval tv;
+	int c, len;
+	struct dhcpMessage packet;
+	struct in_addr temp_addr;
+	time_t now;
+	int max_fd;
+	int sig;
+
+	static const struct option arg_options[] = {
+		{"clientid",	required_argument,	0, 'c'},
+		{"foreground",	no_argument,		0, 'f'},
+		{"background",	no_argument,		0, 'b'},
+		{"hostname",	required_argument,	0, 'H'},
+		{"hostname",    required_argument,      0, 'h'},
+		{"interface",	required_argument,	0, 'i'},
+		{"now", 	no_argument,		0, 'n'},
+		{"pidfile",	required_argument,	0, 'p'},
+		{"quit",	no_argument,		0, 'q'},
+		{"request",	required_argument,	0, 'r'},
+		{"script",	required_argument,	0, 's'},
+		{"version",	no_argument,		0, 'v'},
+		{0, 0, 0, 0}
+	};
+
+	/* get options */
+	while (1) {
+		int option_index = 0;
+		c = getopt_long(argc, argv, "c:fbH:h:i:np:qr:s:v", arg_options, &option_index);
+		if (c == -1) break;
+		
+		switch (c) {
+		case 'c':
+			len = strlen(optarg) > 255 ? 255 : strlen(optarg);
+			if (client_config.clientid) free(client_config.clientid);
+			client_config.clientid = xmalloc(len + 2);
+			client_config.clientid[OPT_CODE] = DHCP_CLIENT_ID;
+			client_config.clientid[OPT_LEN] = len;
+			client_config.clientid[OPT_DATA] = '\0';
+			strncpy(client_config.clientid + OPT_DATA, optarg, len);
+			break;
+		case 'f':
+			client_config.foreground = 1;
+			break;
+		case 'b':
+			client_config.background_if_no_lease = 1;
+			break;
+		case 'h':
+		case 'H':
+			len = strlen(optarg) > 255 ? 255 : strlen(optarg);
+			if (client_config.hostname) free(client_config.hostname);
+			client_config.hostname = xmalloc(len + 2);
+			client_config.hostname[OPT_CODE] = DHCP_HOST_NAME;
+			client_config.hostname[OPT_LEN] = len;
+			strncpy(client_config.hostname + 2, optarg, len);
+			break;
+		case 'i':
+			client_config.interface =  optarg;
+			break;
+		case 'n':
+			client_config.abort_if_no_lease = 1;
+			break;
+		case 'p':
+			client_config.pidfile = optarg;
+			break;
+		case 'q':
+			client_config.quit_after_lease = 1;
+			break;
+		case 'r':
+			requested_ip = inet_addr(optarg);
+			break;
+		case 's':
+			client_config.script = optarg;
+			break;
+		case 'v':
+			bb_error_msg("version %s\n", VERSION);
+			return(0);
+			break;
+		default:
+			bb_show_usage();
+		}
+	}
+
+	start_log("client");
+	if (read_interface(client_config.interface, &client_config.ifindex, 
+			   NULL, client_config.arp) < 0)
+		return(1);
+		
+	if (!client_config.clientid) {
+		client_config.clientid = xmalloc(6 + 3);
+		client_config.clientid[OPT_CODE] = DHCP_CLIENT_ID;
+		client_config.clientid[OPT_LEN] = 7;
+		client_config.clientid[OPT_DATA] = 1;
+		memcpy(client_config.clientid + 3, client_config.arp, 6);
+	}
+
+	/* setup signal handlers */
+	udhcp_set_signal_pipe(SIGUSR2);
+	
+	state = INIT_SELECTING;
+	run_script(NULL, "deconfig");
+	change_mode(LISTEN_RAW);
+
+	for (;;) {
+
+		tv.tv_sec = timeout - time(0);
+		tv.tv_usec = 0;
+		FD_ZERO(&rfds);
+
+		if (listen_mode != LISTEN_NONE && fd < 0) {
+			if (listen_mode == LISTEN_KERNEL)
+				fd = listen_socket(INADDR_ANY, CLIENT_PORT, client_config.interface);
+			else
+				fd = raw_socket(client_config.ifindex);
+			if (fd < 0) {
+				LOG(LOG_ERR, "FATAL: couldn't listen on socket, %m");
+				return(0);
+			}
+		}
+		if (fd >= 0) FD_SET(fd, &rfds);
+		FD_SET(udhcp_signal_pipe[0], &rfds);
+
+		if (tv.tv_sec > 0) {
+			DEBUG(LOG_INFO, "Waiting on select...\n");
+			max_fd = udhcp_signal_pipe[0] > fd ? udhcp_signal_pipe[0] : fd;
+			retval = select(max_fd + 1, &rfds, NULL, NULL, &tv);
+		} else retval = 0; /* If we already timed out, fall through */
+
+		now = time(0);
+		if (retval == 0) {
+			/* timeout dropped to zero */
+			switch (state) {
+			case INIT_SELECTING:
+				if (packet_num < 3) {
+					if (packet_num == 0)
+						xid = random_xid();
+
+					/* send discover packet */
+					send_discover(xid, requested_ip); /* broadcast */
+					
+					timeout = now + ((packet_num == 2) ? 4 : 2);
+					packet_num++;
+				} else {
+					if (client_config.background_if_no_lease) {
+						LOG(LOG_INFO, "No lease, forking to background.");
+						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 < 3) {
+					/* send request packet */
+					if (state == RENEW_REQUESTED)
+						send_renew(xid, server_addr, requested_ip); /* unicast */
+					else send_selecting(xid, server_addr, requested_ip); /* broadcast */
+					
+					timeout = now + ((packet_num == 2) ? 10 : 2);
+					packet_num++;
+				} else {
+					/* timed out, go back to init state */
+					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;
+			}
+			
+			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 && FD_ISSET(udhcp_signal_pipe[0], &rfds)) {
+			if (read(udhcp_signal_pipe[0], &sig, sizeof(sig)) < 0) {
+				DEBUG(LOG_ERR, "Could not read signal: %m");
+				continue; /* probably just EINTR */
+			}
+			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/release/src/router/busybox/networking/udhcp/dhcpc.h b/release/src/router/busybox/networking/udhcp/dhcpc.h
new file mode 100644
index 00000000..e23d9d4f
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/dhcpc.h
@@ -0,0 +1,32 @@
+/* dhcpc.h */
+#ifndef _DHCPC_H
+#define _DHCPC_H
+
+#define INIT_SELECTING	0
+#define REQUESTING	1
+#define BOUND		2
+#define RENEWING	3
+#define REBINDING	4
+#define INIT_REBOOT	5
+#define RENEW_REQUESTED 6
+#define RELEASED	7
+
+
+struct client_config_t {
+	char foreground;		/* Do not fork */
+	char quit_after_lease;		/* Quit after obtaining lease */
+	char abort_if_no_lease;		/* Abort if no lease */
+	char background_if_no_lease;	/* Fork to background if no lease */
+	char *interface;		/* The name of the interface to use */
+	char *pidfile;			/* Optionally store the process ID */
+	char *script;			/* User script to run at dhcp events */
+	unsigned char *clientid;	/* Optional client id to use */
+	unsigned char *hostname;	/* Optional hostname to use */
+	int ifindex;			/* Index number of the interface to use */
+	unsigned char arp[6];		/* Our arp address */
+};
+
+extern struct client_config_t client_config;
+
+
+#endif
diff --git a/release/src/router/busybox/networking/udhcp/dhcpd.c b/release/src/router/busybox/networking/udhcp/dhcpd.c
new file mode 100644
index 00000000..c21cb72a
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/dhcpd.c
@@ -0,0 +1,253 @@
+/* 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"
+
+
+/* globals */
+struct dhcpOfferedAddr *leases;
+struct server_config_t server_config;
+
+
+int udhcpd_main(int argc, char *argv[])
+{	
+	fd_set rfds;
+	struct timeval tv;
+	int server_socket = -1;
+	int bytes, retval;
+	struct dhcpMessage packet;
+	unsigned char *state;
+	unsigned char *server_id, *requested;
+	u_int32_t server_id_align, requested_align;
+	unsigned long timeout_end;
+	struct option_set *option;
+	struct dhcpOfferedAddr *lease;
+	int max_sock;
+	int sig;
+	unsigned long num_ips;
+	
+	start_log("server");
+
+	memset(&server_config, 0, sizeof(struct server_config_t));
+	
+	if (argc < 2)
+		read_config(DHCPD_CONF_FILE);
+	else read_config(argv[1]);
+
+	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);
+	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(sizeof(struct dhcpOfferedAddr), server_config.max_leases);
+	read_leases(server_config.lease_file);
+
+	if (read_interface(server_config.interface, &server_config.ifindex,
+			   &server_config.server, server_config.arp) < 0)
+		return(1);
+
+#ifndef CONFIG_FEATURE_UDHCP_DEBUG
+	background(server_config.pidfile);
+#endif
+
+	udhcp_set_signal_pipe(0);
+
+	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);
+			}			
+
+		FD_ZERO(&rfds);
+		FD_SET(server_socket, &rfds);
+		FD_SET(udhcp_signal_pipe[0], &rfds);
+		if (server_config.auto_time) {
+			tv.tv_sec = timeout_end - time(0);
+			tv.tv_usec = 0;
+		}
+		if (!server_config.auto_time || tv.tv_sec > 0) {
+			max_sock = server_socket > udhcp_signal_pipe[0] ? server_socket : udhcp_signal_pipe[0];
+			retval = select(max_sock + 1, &rfds, NULL, NULL, 
+					server_config.auto_time ? &tv : NULL);
+		} else retval = 0; /* If we already timed out, fall through */
+
+		if (retval == 0) {
+			write_leases();
+			timeout_end = time(0) + server_config.auto_time;
+			continue;
+		} else if (retval < 0 && errno != EINTR) {
+			DEBUG(LOG_INFO, "error on select");
+			continue;
+		}
+		
+		if (FD_ISSET(udhcp_signal_pipe[0], &rfds)) {
+			if (read(udhcp_signal_pipe[0], &sig, sizeof(sig)) < 0)
+				continue; /* probably just EINTR */
+			switch (sig) {
+			case SIGUSR1:
+				LOG(LOG_INFO, "Received a SIGUSR1");
+				write_leases();
+				/* why not just reset the timeout, eh */
+				timeout_end = time(0) + server_config.auto_time;
+				continue;
+			case SIGTERM:
+				LOG(LOG_INFO, "Received a SIGTERM");
+				return(0);
+			}
+		}
+
+		if ((bytes = get_packet(&packet, server_socket)) < 0) { /* this waits for a packet - idle */
+			if (bytes == -1 && errno != EINTR) {
+				DEBUG(LOG_INFO, "error on read, %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;
+		}
+		
+		/* ADDME: look for a static lease */
+		lease = find_lease_by_chaddr(packet.chaddr);
+		switch (state[0]) {
+		case DHCPDISCOVER:
+			DEBUG(LOG_INFO,"received DISCOVER");
+			
+			if (sendOffer(&packet) < 0) {
+				LOG(LOG_ERR, "send OFFER failed");
+			}
+			break;			
+ 		case DHCPREQUEST:
+			DEBUG(LOG_INFO, "received REQUEST");
+
+			requested = get_option(&packet, DHCP_REQUESTED_IP);
+			server_id = get_option(&packet, DHCP_SERVER_ID);
+
+			if (requested) memcpy(&requested_align, requested, 4);
+			if (server_id) memcpy(&server_id_align, server_id, 4);
+		
+			if (lease) { /*ADDME: or static lease */
+				if (server_id) {
+					/* SELECTING State */
+					DEBUG(LOG_INFO, "server_id = %08x", ntohl(server_id_align));
+					if (server_id_align == server_config.server && requested && 
+					    requested_align == lease->yiaddr) {
+						sendACK(&packet, lease->yiaddr);
+					}
+				} else {
+					if (requested) {
+						/* INIT-REBOOT State */
+						if (lease->yiaddr == requested_align)
+							sendACK(&packet, lease->yiaddr);
+						else sendNAK(&packet);
+					} else {
+						/* RENEWING or REBINDING State */
+						if (lease->yiaddr == packet.ciaddr)
+							sendACK(&packet, lease->yiaddr);
+						else {
+							/* don't know what to do!!!! */
+							sendNAK(&packet);
+						}
+					}						
+				}
+			
+			/* what to do if we have no record of the client */
+			} else if (server_id) {
+				/* SELECTING State */
+
+			} else if (requested) {
+				/* INIT-REBOOT State */
+				if ((lease = find_lease_by_yiaddr(requested_align))) {
+					if (lease_expired(lease)) {
+						/* probably best if we drop this lease */
+						memset(lease->chaddr, 0, 16);
+					/* make some contention for this address */
+					} else sendNAK(&packet);
+				} else if (requested_align < server_config.start || 
+					   requested_align > server_config.end) {
+					sendNAK(&packet);
+				} /* else remain silent */
+
+			} else {
+				 /* RENEWING or REBINDING State */
+			}
+			break;
+		case DHCPDECLINE:
+			DEBUG(LOG_INFO,"received DECLINE");
+			if (lease) {
+				memset(lease->chaddr, 0, 16);
+				lease->expires = time(0) + server_config.decline_time;
+			}			
+			break;
+		case DHCPRELEASE:
+			DEBUG(LOG_INFO,"received RELEASE");
+			if (lease) lease->expires = time(0);
+			break;
+		case DHCPINFORM:
+			DEBUG(LOG_INFO,"received INFORM");
+			send_inform(&packet);
+			break;	
+		default:
+			LOG(LOG_WARNING, "unsupported DHCP message (%02x) -- ignoring", state[0]);
+		}
+	}
+
+	return 0;
+}
diff --git a/release/src/router/busybox/networking/udhcp/dhcpd.h b/release/src/router/busybox/networking/udhcp/dhcpd.h
new file mode 100644
index 00000000..e219143c
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/dhcpd.h
@@ -0,0 +1,130 @@
+/* dhcpd.h */
+#ifndef _DHCPD_H
+#define _DHCPD_H
+
+#include <netinet/ip.h>
+#include <netinet/udp.h>
+
+#include "leases.h"
+
+/************************************/
+/* Defaults _you_ may want to tweak */
+/************************************/
+
+/* the period of time the client is allowed to use that address */
+#define LEASE_TIME              (60*60*24*10) /* 10 days of seconds */
+
+/* where to find the DHCP server configuration file */
+#define DHCPD_CONF_FILE         "/etc/udhcpd.conf"
+
+/*****************************************************************/
+/* Do not modify below here unless you know what you are doing!! */
+/*****************************************************************/
+
+/* DHCP protocol -- see RFC 2131 */
+#define SERVER_PORT		67
+#define CLIENT_PORT		68
+
+#define DHCP_MAGIC		0x63825363
+
+/* DHCP option codes (partial list) */
+#define DHCP_PADDING		0x00
+#define DHCP_SUBNET		0x01
+#define DHCP_TIME_OFFSET	0x02
+#define DHCP_ROUTER		0x03
+#define DHCP_TIME_SERVER	0x04
+#define DHCP_NAME_SERVER	0x05
+#define DHCP_DNS_SERVER		0x06
+#define DHCP_LOG_SERVER		0x07
+#define DHCP_COOKIE_SERVER	0x08
+#define DHCP_LPR_SERVER		0x09
+#define DHCP_HOST_NAME		0x0c
+#define DHCP_BOOT_SIZE		0x0d
+#define DHCP_DOMAIN_NAME	0x0f
+#define DHCP_SWAP_SERVER	0x10
+#define DHCP_ROOT_PATH		0x11
+#define DHCP_IP_TTL		0x17
+#define DHCP_MTU		0x1a
+#define DHCP_BROADCAST		0x1c
+#define DHCP_NTP_SERVER		0x2a
+#define DHCP_WINS_SERVER	0x2c
+#define DHCP_REQUESTED_IP	0x32
+#define DHCP_LEASE_TIME		0x33
+#define DHCP_OPTION_OVER	0x34
+#define DHCP_MESSAGE_TYPE	0x35
+#define DHCP_SERVER_ID		0x36
+#define DHCP_PARAM_REQ		0x37
+#define DHCP_MESSAGE		0x38
+#define DHCP_MAX_SIZE		0x39
+#define DHCP_T1			0x3a
+#define DHCP_T2			0x3b
+#define DHCP_VENDOR		0x3c
+#define DHCP_CLIENT_ID		0x3d
+
+#define DHCP_END		0xFF
+
+
+#define BOOTREQUEST		1
+#define BOOTREPLY		2
+
+#define ETH_10MB		1
+#define ETH_10MB_LEN		6
+
+#define DHCPDISCOVER		1
+#define DHCPOFFER		2
+#define DHCPREQUEST		3
+#define DHCPDECLINE		4
+#define DHCPACK			5
+#define DHCPNAK			6
+#define DHCPRELEASE		7
+#define DHCPINFORM		8
+
+#define BROADCAST_FLAG		0x8000
+
+#define OPTION_FIELD		0
+#define FILE_FIELD		1
+#define SNAME_FIELD		2
+
+/* miscellaneous defines */
+#define MAC_BCAST_ADDR		(unsigned char *) "\xff\xff\xff\xff\xff\xff"
+#define OPT_CODE 0
+#define OPT_LEN 1
+#define OPT_DATA 2
+
+struct option_set {
+	unsigned char *data;
+	struct option_set *next;
+};
+
+struct server_config_t {
+	u_int32_t server;		/* Our IP, in network order */
+	u_int32_t start;		/* Start address of leases, network order */
+	u_int32_t end;			/* End of leases, network order */
+	struct option_set *options;	/* List of DHCP options loaded from the config file */
+	char *interface;		/* The name of the interface to use */
+	int ifindex;			/* Index number of the interface to use */
+	unsigned char arp[6];		/* Our arp address */
+	unsigned long lease;		/* lease time in seconds (host order) */
+	unsigned long max_leases; 	/* maximum number of leases (including reserved address) */
+	char remaining; 		/* should the lease file be interpreted as lease time remaining, or
+			 		 * as the time the lease expires */
+	unsigned long auto_time; 	/* how long should udhcpd wait before writing a config file.
+					 * if this is zero, it will only write one on SIGUSR1 */
+	unsigned long decline_time; 	/* how long an address is reserved if a client returns a
+				    	 * decline message */
+	unsigned long conflict_time; 	/* how long an arp conflict offender is leased for */
+	unsigned long offer_time; 	/* how long an offered address is reserved */
+	unsigned long min_lease; 	/* minimum lease a client can request*/
+	char *lease_file;
+	char *pidfile;
+	char *notify_file;		/* What to run whenever leases are written */
+	u_int32_t siaddr;		/* next server bootp option */
+	char *sname;			/* bootp server name */
+	char *boot_file;		/* bootp boot file option */
+};	
+
+extern struct server_config_t server_config;
+extern struct dhcpOfferedAddr *leases;
+		
+
+#endif
diff --git a/release/src/router/busybox/networking/udhcp/dumpleases.c b/release/src/router/busybox/networking/udhcp/dumpleases.c
new file mode 100644
index 00000000..4c6107cf
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/dumpleases.c
@@ -0,0 +1,88 @@
+#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 <stdio.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <time.h>
+
+#include "leases.h"
+#include "busybox.h"
+
+#define REMAINING 0
+#define ABSOLUTE 1
+
+int dumpleases_main(int argc, char *argv[])
+{
+	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:
+			bb_show_usage();
+		}
+	}
+			
+	fp = bb_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/release/src/router/busybox/networking/udhcp/files.c b/release/src/router/busybox/networking/udhcp/files.c
new file mode 100644
index 00000000..3d0344b0
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/files.c
@@ -0,0 +1,287 @@
+/* 
+ * 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 "dhcpd.h"
+#include "files.h"
+#include "options.h"
+#include "common.h"
+
+/* 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_str(const char *line, void *arg)
+{
+	char **dest = arg;
+	
+	if (*dest) free(*dest);
+	*dest = strdup(line);
+	
+	return 1;
+}
+
+
+static int read_u32(const char *line, void *arg)
+{
+	u_int32_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;
+}
+
+#define READ_CONFIG_BUF_SIZE 512        /* domainname may have 254 chars */
+
+/* read a dhcp option and add it to opt_list */
+static int read_opt(const char *const_line, void *arg)
+{
+    char line[READ_CONFIG_BUF_SIZE];
+	struct option_set **opt_list = arg;
+	char *opt, *val, *endptr;
+    struct dhcp_option *option;
+    int retval = 0, length;
+    char buffer[256];                       /* max opt length */
+	u_int16_t result_u16;
+	u_int32_t result_u32;
+    void *valptr;
+	
+    if ((opt = strtok(strcpy(line, const_line), " \t="))) {
+		
+	for (option = options; option->code; option++)
+		if (!strcasecmp(option->name, opt))
+			break;
+	
+	if (option->code) do {
+		val = strtok(NULL, ", \t");
+		if(!val)
+			break;
+			length = option_lengths[option->flags & TYPE_MASK];
+		valptr = NULL;
+			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;
+				endptr = buffer + length;
+				endptr[0] = 0;
+				valptr = val;
+				}
+				break;
+			case OPTION_BOOLEAN:
+				retval = read_yn(val, buffer);
+				break;
+			case OPTION_U8:
+				buffer[0] = strtoul(val, &endptr, 0);
+			valptr = buffer;
+				break;
+			case OPTION_U16:
+				result_u16 = htons(strtoul(val, &endptr, 0));
+			valptr = &result_u16;
+				break;
+			case OPTION_S16:
+				result_u16 = htons(strtol(val, &endptr, 0));
+			valptr = &result_u16;
+				break;
+			case OPTION_U32:
+				result_u32 = htonl(strtoul(val, &endptr, 0));
+			valptr = &result_u32;
+				break;
+			case OPTION_S32:
+				result_u32 = htonl(strtol(val, &endptr, 0));	
+			valptr = &result_u32;
+				break;
+			default:
+			retval = 0;
+				break;
+			}
+		if(valptr) {
+			memcpy(buffer, valptr, length);
+			retval = (endptr[0] == '\0');
+		}
+			if (retval) 
+				attach_option(opt_list, option, buffer, length);
+		else
+			break;
+	} while (option->flags & OPTION_LIST);
+    }
+	return retval;
+}
+
+
+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),	""},
+	/*ADDME: static lease */
+	{"",		NULL, 	  NULL,				""}
+};
+
+
+int read_config(const char *file)
+{
+	FILE *in;
+	char buffer[READ_CONFIG_BUF_SIZE], orig[READ_CONFIG_BUF_SIZE];
+	char *token, *line;
+	int i;
+
+	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)) {
+		if (strchr(buffer, '\n')) *(strchr(buffer, '\n')) = '\0';
+		strcpy(orig, buffer);
+		if (strchr(buffer, '#')) *(strchr(buffer, '#')) = '\0';
+		token = strtok(buffer, " \t");
+		if(!token)
+			continue;
+		line = strtok(NULL, "");
+		if(!line)
+			continue;
+		while(*line == '=' || isspace(*line))
+		line++;
+		/* eat trailing whitespace */
+		for (i = strlen(line); i > 0 && isspace(line[i - 1]); i--);
+		line[i] = '\0';
+		if (*line == '\0')
+			continue;
+		
+		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, "unable to parse '%s'", orig);
+					/* reset back to the default value */
+					keywords[i].handler(keywords[i].def, keywords[i].var);
+				}
+	}
+	fclose(in);
+	return 1;
+}
+
+
+void write_leases(void)
+{
+	FILE *fp;
+	unsigned int i;
+	char buf[255];
+	time_t curr = time(0);
+	unsigned long lease_time;
+	
+	if (!(fp = fopen(server_config.lease_file, "w"))) {
+		LOG(LOG_ERR, "Unable to open %s for writing", server_config.lease_file);
+		return;
+	}
+	
+	for (i = 0; i < server_config.max_leases; i++) {
+		struct dhcpOfferedAddr lease;
+		if (leases[i].yiaddr != 0) {
+			if (server_config.remaining) {
+				if (lease_expired(&(leases[i])))
+					lease_time = 0;
+				else lease_time = leases[i].expires - curr;
+			} else lease_time = leases[i].expires;
+			lease.expires = htonl(lease_time);
+			memcpy(lease.chaddr, leases[i].chaddr, 16);
+			lease.yiaddr = leases[i].yiaddr;
+			fwrite(leases, sizeof(lease), 1, fp);
+		}
+	}
+	fclose(fp);
+	
+	if (server_config.notify_file) {
+		sprintf(buf, "%s %s", server_config.notify_file, server_config.lease_file);
+		system(buf);
+	}
+}
+
+
+void read_leases(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/release/src/router/busybox/networking/udhcp/files.h b/release/src/router/busybox/networking/udhcp/files.h
new file mode 100644
index 00000000..279738ad
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/files.h
@@ -0,0 +1,17 @@
+/* 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);
+
+#endif
diff --git a/release/src/router/busybox/networking/udhcp/frontend.c b/release/src/router/busybox/networking/udhcp/frontend.c
new file mode 100644
index 00000000..de577950
--- /dev/null
+++ b/release/src/router/busybox/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/release/src/router/busybox/networking/udhcp/leases.c b/release/src/router/busybox/networking/udhcp/leases.c
new file mode 100644
index 00000000..0b6b409c
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/leases.c
@@ -0,0 +1,149 @@
+/* 
+ * 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 "arpping.h"
+#include "common.h"
+
+
+unsigned char blank_chaddr[] = {[0 ... 15] = 0};
+
+/* clear every lease out that chaddr OR yiaddr matches and is nonzero */
+void clear_lease(u_int8_t *chaddr, u_int32_t yiaddr)
+{
+	unsigned int i, j;
+	
+	for (j = 0; j < 16 && !chaddr[j]; j++);
+	
+	for (i = 0; i < server_config.max_leases; i++)
+		if ((j != 16 && !memcmp(leases[i].chaddr, chaddr, 16)) ||
+		    (yiaddr && leases[i].yiaddr == yiaddr)) {
+			memset(&(leases[i]), 0, sizeof(struct dhcpOfferedAddr));
+		}
+}
+
+
+/* add a lease into the table, clearing out any old ones */
+struct dhcpOfferedAddr *add_lease(u_int8_t *chaddr, u_int32_t yiaddr, unsigned long lease)
+{
+	struct dhcpOfferedAddr *oldest;
+	
+	/* clean out any old ones */
+	clear_lease(chaddr, yiaddr);
+		
+	oldest = oldest_expired_lease();
+	
+	if (oldest) {
+		memcpy(oldest->chaddr, chaddr, 16);
+		oldest->yiaddr = yiaddr;
+		oldest->expires = time(0) + lease;
+	}
+	
+	return oldest;
+}
+
+
+/* true if a lease has expired */
+int lease_expired(struct dhcpOfferedAddr *lease)
+{
+	return (lease->expires < (unsigned long) time(0));
+}	
+
+
+/* Find the oldest expired lease, NULL if there are no expired leases */
+struct dhcpOfferedAddr *oldest_expired_lease(void)
+{
+	struct dhcpOfferedAddr *oldest = NULL;
+	unsigned long oldest_lease = time(0);
+	unsigned int i;
+
+	
+	for (i = 0; i < server_config.max_leases; i++)
+		if (oldest_lease > leases[i].expires) {
+			oldest_lease = leases[i].expires;
+			oldest = &(leases[i]);
+		}
+	return oldest;
+		
+}
+
+
+/* Find the first lease that matches chaddr, NULL if no match */
+struct dhcpOfferedAddr *find_lease_by_chaddr(u_int8_t *chaddr)
+{
+	unsigned int i;
+
+	for (i = 0; i < server_config.max_leases; i++)
+		if (!memcmp(leases[i].chaddr, chaddr, 16)) return &(leases[i]);
+	
+	return NULL;
+}
+
+
+/* Find the first lease that matches yiaddr, NULL is no match */
+struct dhcpOfferedAddr *find_lease_by_yiaddr(u_int32_t yiaddr)
+{
+	unsigned int i;
+
+	for (i = 0; i < server_config.max_leases; i++)
+		if (leases[i].yiaddr == yiaddr) return &(leases[i]);
+	
+	return NULL;
+}
+
+
+/* check is an IP is taken, if it is, add it to the lease table */
+static int check_ip(u_int32_t addr)
+{
+	struct in_addr temp;
+
+	if (arpping(addr, server_config.server, server_config.arp, server_config.interface) == 0) {
+		temp.s_addr = addr;
+		LOG(LOG_INFO, "%s belongs to someone, reserving it for %ld seconds",
+			inet_ntoa(temp), server_config.conflict_time);
+		add_lease(blank_chaddr, addr, server_config.conflict_time);
+		return 1;
+	} else return 0;
+}
+
+/* find an assignable address, it check_expired is true, we check all the expired leases as well.
+ * Maybe this should try expired leases by age... */
+u_int32_t find_address(int check_expired) 
+{
+	u_int32_t addr, ret;
+	struct dhcpOfferedAddr *lease = NULL;		
+
+	addr = ntohl(server_config.start); /* addr is in host order here */
+	for (;addr <= ntohl(server_config.end); addr++) {
+
+		/* ie, 192.168.55.0 */
+		if (!(addr & 0xFF)) continue;
+
+		/* ie, 192.168.55.255 */
+		if ((addr & 0xFF) == 0xFF) continue;
+
+		/* lease is not taken */
+		ret = htonl(addr);
+		if ((!(lease = find_lease_by_yiaddr(ret)) ||
+
+		     /* or it expired and we are checking for expired leases */
+		     (check_expired  && lease_expired(lease))) &&
+
+		     /* and it isn't on the network */
+	    	     !check_ip(ret)) {
+			return ret;
+			break;
+		}
+	}
+	return 0;
+}
diff --git a/release/src/router/busybox/networking/udhcp/leases.h b/release/src/router/busybox/networking/udhcp/leases.h
new file mode 100644
index 00000000..d54cd11c
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/leases.h
@@ -0,0 +1,25 @@
+/* leases.h */
+#ifndef _LEASES_H
+#define _LEASES_H
+
+
+struct dhcpOfferedAddr {
+	u_int8_t chaddr[16];
+	u_int32_t yiaddr;	/* network order */
+	u_int32_t expires;	/* host order */
+};
+
+extern const char leases_file[];
+
+extern unsigned char blank_chaddr[];
+
+void clear_lease(u_int8_t *chaddr, u_int32_t yiaddr);
+struct dhcpOfferedAddr *add_lease(u_int8_t *chaddr, u_int32_t yiaddr, unsigned long lease);
+int lease_expired(struct dhcpOfferedAddr *lease);
+struct dhcpOfferedAddr *oldest_expired_lease(void);
+struct dhcpOfferedAddr *find_lease_by_chaddr(u_int8_t *chaddr);
+struct dhcpOfferedAddr *find_lease_by_yiaddr(u_int32_t yiaddr);
+u_int32_t find_address(int check_expired);
+
+
+#endif
diff --git a/release/src/router/busybox/networking/udhcp/leases_file.c b/release/src/router/busybox/networking/udhcp/leases_file.c
new file mode 100644
index 00000000..96e2f2d1
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/leases_file.c
@@ -0,0 +1 @@
+const char leases_file[] = "/var/lib/misc/udhcpd.leases";
diff --git a/release/src/router/busybox/networking/udhcp/libbb_udhcp.h b/release/src/router/busybox/networking/udhcp/libbb_udhcp.h
new file mode 100644
index 00000000..e0942980
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/libbb_udhcp.h
@@ -0,0 +1,29 @@
+/* libbb_udhcp.h - busybox compatability wrapper */
+
+#ifndef _LIBBB_UDHCP_H
+#define _LIBBB_UDHCP_H
+
+#ifdef IN_BUSYBOX
+#include "libbb.h"
+
+#ifdef CONFIG_FEATURE_UDHCP_SYSLOG
+#define SYSLOG
+#endif
+
+#ifdef CONFIG_FEATURE_UDHCP_DEBUG
+#define DEBUG
+#endif
+
+#define COMBINED_BINARY
+#include "version.h"
+
+#else /* ! BB_VER */
+
+#define TRUE			1
+#define FALSE			0
+
+#define xmalloc malloc
+
+#endif /* BB_VER */
+
+#endif /* _LIBBB_UDHCP_H */
diff --git a/release/src/router/busybox/networking/udhcp/options.c b/release/src/router/busybox/networking/udhcp/options.c
new file mode 100644
index 00000000..a3edd0b8
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/options.c
@@ -0,0 +1,228 @@
+/* 
+ * options.c -- DHCP server option packet tools 
+ * Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001
+ */
+ 
+#include <stdlib.h>
+#include <string.h>
+
+#include "dhcpd.h"
+#include "files.h"
+#include "options.h"
+#include "common.h"
+
+
+/* supported options are easily added here */
+struct dhcp_option options[] = {
+	/* name[10]	flags					code */
+	{"subnet",	OPTION_IP | OPTION_REQ,			0x01},
+	{"timezone",	OPTION_S32,				0x02},
+	{"router",	OPTION_IP | OPTION_LIST | OPTION_REQ,	0x03},
+	{"timesvr",	OPTION_IP | OPTION_LIST,		0x04},
+	{"namesvr",	OPTION_IP | OPTION_LIST,		0x05},
+	{"dns",		OPTION_IP | OPTION_LIST | OPTION_REQ,	0x06},
+	{"logsvr",	OPTION_IP | OPTION_LIST,		0x07},
+	{"cookiesvr",	OPTION_IP | OPTION_LIST,		0x08},
+	{"lprsvr",	OPTION_IP | OPTION_LIST,		0x09},
+	{"hostname",	OPTION_STRING | OPTION_REQ,		0x0c},
+	{"bootsize",	OPTION_U16,				0x0d},
+	{"domain",	OPTION_STRING | OPTION_REQ,		0x0f},
+	{"swapsvr",	OPTION_IP,				0x10},
+	{"rootpath",	OPTION_STRING,				0x11},
+	{"ipttl",	OPTION_U8,				0x17},
+	{"mtu",		OPTION_U16,				0x1a},
+	{"broadcast",	OPTION_IP | OPTION_REQ,			0x1c},
+	{"ntpsrv",	OPTION_IP | OPTION_LIST,		0x2a},
+	{"wins",	OPTION_IP | OPTION_LIST,		0x2c},
+	{"requestip",	OPTION_IP,				0x32},
+	{"lease",	OPTION_U32,				0x33},
+	{"dhcptype",	OPTION_U8,				0x35},
+	{"serverid",	OPTION_IP,				0x36},
+	{"message",	OPTION_STRING,				0x38},
+	{"tftp",	OPTION_STRING,				0x42},
+	{"bootfile",	OPTION_STRING,				0x43},
+	{"",		0x00,				0x00}
+};
+
+/* Lengths of the different option types */
+int option_lengths[] = {
+	[OPTION_IP] =		4,
+	[OPTION_IP_PAIR] =	8,
+	[OPTION_BOOLEAN] =	1,
+	[OPTION_STRING] =	1,
+	[OPTION_U8] =		1,
+	[OPTION_U16] =		2,
+	[OPTION_S16] =		2,
+	[OPTION_U32] =		4,
+	[OPTION_S32] =		4
+};
+
+
+/* get an option with bounds checking (warning, not aligned). */
+unsigned char *get_option(struct dhcpMessage *packet, int code)
+{
+	int i, length;
+	unsigned char *optionptr;
+	int over = 0, done = 0, curr = OPTION_FIELD;
+	
+	optionptr = packet->options;
+	i = 0;
+	length = 308;
+	while (!done) {
+		if (i >= length) {
+			LOG(LOG_WARNING, "bogus packet, option fields too long.");
+			return NULL;
+		}
+		if (optionptr[i + OPT_CODE] == code) {
+			if (i + 1 + optionptr[i + OPT_LEN] >= length) {
+				LOG(LOG_WARNING, "bogus packet, option fields too long.");
+				return NULL;
+			}
+			return optionptr + i + 2;
+		}			
+		switch (optionptr[i + OPT_CODE]) {
+		case DHCP_PADDING:
+			i++;
+			break;
+		case DHCP_OPTION_OVER:
+			if (i + 1 + optionptr[i + OPT_LEN] >= length) {
+				LOG(LOG_WARNING, "bogus packet, option fields too long.");
+				return NULL;
+			}
+			over = optionptr[i + 3];
+			i += optionptr[OPT_LEN] + 2;
+			break;
+		case DHCP_END:
+			if (curr == OPTION_FIELD && over & FILE_FIELD) {
+				optionptr = packet->file;
+				i = 0;
+				length = 128;
+				curr = FILE_FIELD;
+			} else if (curr == FILE_FIELD && over & SNAME_FIELD) {
+				optionptr = packet->sname;
+				i = 0;
+				length = 64;
+				curr = SNAME_FIELD;
+			} else done = 1;
+			break;
+		default:
+			i += optionptr[OPT_LEN + i] + 2;
+		}
+	}
+	return NULL;
+}
+
+
+/* return the position of the 'end' option (no bounds checking) */
+int end_option(unsigned char *optionptr) 
+{
+	int i = 0;
+	
+	while (optionptr[i] != DHCP_END) {
+		if (optionptr[i] == DHCP_PADDING) i++;
+		else i += optionptr[i + OPT_LEN] + 2;
+	}
+	return i;
+}
+
+
+/* add an option string to the options (an option string contains an option code,
+ * length, then data) */
+int add_option_string(unsigned char *optionptr, unsigned char *string)
+{
+	int end = end_option(optionptr);
+	
+	/* end position + string length + option code/length + end option */
+	if (end + string[OPT_LEN] + 2 + 1 >= 308) {
+		LOG(LOG_ERR, "Option 0x%02x did not fit into the packet!", string[OPT_CODE]);
+		return 0;
+	}
+	DEBUG(LOG_INFO, "adding option 0x%02x", string[OPT_CODE]);
+	memcpy(optionptr + end, string, string[OPT_LEN] + 2);
+	optionptr[end + string[OPT_LEN] + 2] = DHCP_END;
+	return string[OPT_LEN] + 2;
+}
+
+
+/* add a one to four byte option to a packet */
+int add_simple_option(unsigned char *optionptr, unsigned char code, u_int32_t data)
+{
+	char length = 0;
+	int i;
+	unsigned char option[2 + 4];
+	unsigned char *u8;
+	u_int16_t *u16;
+	u_int32_t *u32;
+	u_int32_t aligned;
+	u8 = (unsigned char *) &aligned;
+	u16 = (u_int16_t *) &aligned;
+	u32 = &aligned;
+
+	for (i = 0; options[i].code; i++)
+		if (options[i].code == code) {
+			length = option_lengths[options[i].flags & TYPE_MASK];
+		}
+		
+	if (!length) {
+		DEBUG(LOG_ERR, "Could not add option 0x%02x", code);
+		return 0;
+	}
+	
+	option[OPT_CODE] = code;
+	option[OPT_LEN] = length;
+
+	switch (length) {
+		case 1: *u8 =  data; break;
+		case 2: *u16 = data; break;
+		case 4: *u32 = data; break;
+	}
+	memcpy(option + 2, &aligned, length);
+	return add_option_string(optionptr, option);
+}
+
+
+/* find option 'code' in opt_list */
+struct option_set *find_option(struct option_set *opt_list, char code)
+{
+	while (opt_list && opt_list->data[OPT_CODE] < code)
+		opt_list = opt_list->next;
+
+	if (opt_list && opt_list->data[OPT_CODE] == code) return opt_list;
+	else return NULL;
+}
+
+
+/* add an option to the opt_list */
+void attach_option(struct option_set **opt_list, struct dhcp_option *option, char *buffer, int length)
+{
+	struct option_set *existing, *new, **curr;
+
+	/* add it to an existing option */
+	if ((existing = find_option(*opt_list, option->code))) {
+		DEBUG(LOG_INFO, "Attaching option %s to existing member of list", option->name);
+		if (option->flags & OPTION_LIST) {
+			if (existing->data[OPT_LEN] + length <= 255) {
+				existing->data = realloc(existing->data, 
+						existing->data[OPT_LEN] + length + 2);
+				memcpy(existing->data + existing->data[OPT_LEN] + 2, buffer, length);
+				existing->data[OPT_LEN] += length;
+			} /* else, ignore the data, we could put this in a second option in the future */
+		} /* else, ignore the new data */
+	} else {
+		DEBUG(LOG_INFO, "Attaching option %s to list", option->name);
+		
+		/* make a new option */
+		new = 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;		
+	}
+}
diff --git a/release/src/router/busybox/networking/udhcp/options.h b/release/src/router/busybox/networking/udhcp/options.h
new file mode 100644
index 00000000..1fded2ef
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/options.h
@@ -0,0 +1,40 @@
+/* options.h */
+#ifndef _OPTIONS_H
+#define _OPTIONS_H
+
+#include "packet.h"
+
+#define TYPE_MASK	0x0F
+
+enum {
+	OPTION_IP=1,
+	OPTION_IP_PAIR,
+	OPTION_STRING,
+	OPTION_BOOLEAN,
+	OPTION_U8,
+	OPTION_U16,
+	OPTION_S16,
+	OPTION_U32,
+	OPTION_S32
+};
+
+#define OPTION_REQ	0x10 /* have the client request this option */
+#define OPTION_LIST	0x20 /* There can be a list of 1 or more of these */
+
+struct dhcp_option {
+	char name[10];
+	char flags;
+	unsigned char code;
+};
+
+extern struct dhcp_option options[];
+extern int option_lengths[];
+
+unsigned char *get_option(struct dhcpMessage *packet, int code);
+int end_option(unsigned char *optionptr);
+int add_option_string(unsigned char *optionptr, unsigned char *string);
+int add_simple_option(unsigned char *optionptr, unsigned char code, u_int32_t data);
+struct option_set *find_option(struct option_set *opt_list, char code);
+void attach_option(struct option_set **opt_list, struct dhcp_option *option, char *buffer, int length);
+
+#endif
diff --git a/release/src/router/busybox/networking/udhcp/packet.c b/release/src/router/busybox/networking/udhcp/packet.c
new file mode 100644
index 00000000..0f2a3bc6
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/packet.c
@@ -0,0 +1,201 @@
+#include <unistd.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <features.h>
+#if __GLIBC__ >=2 && __GLIBC_MINOR >= 1
+#include <netpacket/packet.h>
+#include <net/ethernet.h>
+#else
+#include <asm/types.h>
+#include <linux/if_packet.h>
+#include <linux/if_ether.h>
+#endif
+#include <errno.h>
+
+#include "dhcpd.h"
+#include "options.h"
+#include "common.h"
+
+
+void init_header(struct dhcpMessage *packet, char type)
+{
+	memset(packet, 0, sizeof(struct dhcpMessage));
+	switch (type) {
+	case DHCPDISCOVER:
+	case DHCPREQUEST:
+	case DHCPRELEASE:
+	case DHCPINFORM:
+		packet->op = BOOTREQUEST;
+		break;
+	case DHCPOFFER:
+	case DHCPACK:
+	case DHCPNAK:
+		packet->op = BOOTREPLY;
+	}
+	packet->htype = ETH_10MB;
+	packet->hlen = ETH_10MB_LEN;
+	packet->cookie = htonl(DHCP_MAGIC);
+	packet->options[0] = DHCP_END;
+	add_simple_option(packet->options, DHCP_MESSAGE_TYPE, type);
+}
+
+
+/* read a packet from socket fd, return -1 on read error, -2 on packet error */
+int get_packet(struct dhcpMessage *packet, int fd)
+{
+	int bytes;
+	int i;
+	const char broken_vendors[][8] = {
+		"MSFT 98",
+		""
+	};
+	char unsigned *vendor;
+
+	memset(packet, 0, sizeof(struct dhcpMessage));
+	bytes = read(fd, packet, sizeof(struct dhcpMessage));
+	if (bytes < 0) {
+		DEBUG(LOG_INFO, "couldn't read on listening socket, ignoring");
+		return -1;
+	}
+
+	if (ntohl(packet->cookie) != DHCP_MAGIC) {
+		LOG(LOG_ERR, "received bogus message, ignoring");
+		return -2;
+	}
+	DEBUG(LOG_INFO, "Received a packet");
+	
+	if (packet->op == BOOTREQUEST && (vendor = get_option(packet, DHCP_VENDOR))) {
+		for (i = 0; broken_vendors[i][0]; i++) {
+			if (vendor[OPT_LEN - 2] == (unsigned char) strlen(broken_vendors[i]) &&
+			    !strncmp(vendor, broken_vendors[i], vendor[OPT_LEN - 2])) {
+			    	DEBUG(LOG_INFO, "broken client (%s), forcing broadcast",
+			    		broken_vendors[i]);
+			    	packet->flags |= htons(BROADCAST_FLAG);
+			}
+		}
+	}
+			    	
+
+	return bytes;
+}
+
+
+u_int16_t checksum(void *addr, int count)
+{
+	/* Compute Internet Checksum for "count" bytes
+	 *         beginning at location "addr".
+	 */
+	register int32_t sum = 0;
+	u_int16_t *source = (u_int16_t *) addr;
+
+	while (count > 1)  {
+		/*  This is the inner loop */
+		sum += *source++;
+		count -= 2;
+	}
+
+	/*  Add left-over byte, if any */
+	if (count > 0) {
+		/* Make sure that the left-over byte is added correctly both
+		 * with little and big endian hosts */
+		u_int16_t tmp = 0;
+		*(unsigned char *) (&tmp) = * (unsigned char *) source;
+		sum += tmp;
+	}
+	/*  Fold 32-bit sum to 16 bits */
+	while (sum >> 16)
+		sum = (sum & 0xffff) + (sum >> 16);
+
+	return ~sum;
+}
+
+
+/* Constuct a ip/udp header for a packet, and specify the source and dest hardware address */
+int raw_packet(struct dhcpMessage *payload, u_int32_t source_ip, int source_port,
+		   u_int32_t dest_ip, int dest_port, unsigned char *dest_arp, int ifindex)
+{
+	int fd;
+	int result;
+	struct sockaddr_ll dest;
+	struct udp_dhcp_packet packet;
+
+	if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
+		DEBUG(LOG_ERR, "socket call failed: %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, u_int32_t source_ip, int source_port,
+		   u_int32_t dest_ip, int dest_port)
+{
+	int n = 1;
+	int fd, result;
+	struct sockaddr_in client;
+	
+	if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
+		return -1;
+	
+	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &n, sizeof(n)) == -1)
+		return -1;
+
+	memset(&client, 0, sizeof(client));
+	client.sin_family = AF_INET;
+	client.sin_port = htons(source_port);
+	client.sin_addr.s_addr = source_ip;
+
+	if (bind(fd, (struct sockaddr *)&client, sizeof(struct sockaddr)) == -1)
+		return -1;
+
+	memset(&client, 0, sizeof(client));
+	client.sin_family = AF_INET;
+	client.sin_port = htons(dest_port);
+	client.sin_addr.s_addr = dest_ip; 
+
+	if (connect(fd, (struct sockaddr *)&client, sizeof(struct sockaddr)) == -1)
+		return -1;
+
+	result = write(fd, payload, sizeof(struct dhcpMessage));
+	close(fd);
+	return result;
+}	
diff --git a/release/src/router/busybox/networking/udhcp/packet.h b/release/src/router/busybox/networking/udhcp/packet.h
new file mode 100644
index 00000000..1a263ef8
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/packet.h
@@ -0,0 +1,41 @@
+#ifndef _PACKET_H
+#define _PACKET_H
+
+#include <netinet/udp.h>
+#include <netinet/ip.h>
+
+struct dhcpMessage {
+	u_int8_t op;
+	u_int8_t htype;
+	u_int8_t hlen;
+	u_int8_t hops;
+	u_int32_t xid;
+	u_int16_t secs;
+	u_int16_t flags;
+	u_int32_t ciaddr;
+	u_int32_t yiaddr;
+	u_int32_t siaddr;
+	u_int32_t giaddr;
+	u_int8_t chaddr[16];
+	u_int8_t sname[64];
+	u_int8_t file[128];
+	u_int32_t cookie;
+	u_int8_t options[308]; /* 312 - cookie */ 
+};
+
+struct udp_dhcp_packet {
+	struct iphdr ip;
+	struct udphdr udp;
+	struct dhcpMessage data;
+};
+
+void init_header(struct dhcpMessage *packet, char type);
+int get_packet(struct dhcpMessage *packet, int fd);
+u_int16_t checksum(void *addr, int count);
+int raw_packet(struct dhcpMessage *payload, u_int32_t source_ip, int source_port,
+		   u_int32_t dest_ip, int dest_port, unsigned char *dest_arp, int ifindex);
+int kernel_packet(struct dhcpMessage *payload, u_int32_t source_ip, int source_port,
+		   u_int32_t dest_ip, int dest_port);
+
+
+#endif
diff --git a/release/src/router/busybox/networking/udhcp/pidfile.c b/release/src/router/busybox/networking/udhcp/pidfile.c
new file mode 100644
index 00000000..246a64aa
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/pidfile.c
@@ -0,0 +1,69 @@
+/* pidfile.c
+ *
+ * Functions to assist in the writing and removing of pidfiles.
+ *
+ * Russ Dill <Russ.Dill@asu.edu> Soptember 2001
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "debug.h"
+
+int pidfile_acquire(char *pidfile)
+{
+	int pid_fd;
+	if (pidfile == NULL) return -1;
+
+	pid_fd = open(pidfile, O_CREAT | O_WRONLY, 0644);
+	if (pid_fd < 0) {
+		LOG(LOG_ERR, "Unable to open pidfile %s: %s\n",
+		    pidfile, strerror(errno));
+	} else {
+		lockf(pid_fd, F_LOCK, 0);
+	}
+	
+	return pid_fd;
+}
+
+
+void pidfile_write_release(int pid_fd)
+{
+	FILE *out;
+
+	if (pid_fd < 0) return;
+
+	if ((out = fdopen(pid_fd, "w")) != NULL) {
+		fprintf(out, "%d\n", getpid());
+		fclose(out);
+	}
+	lockf(pid_fd, F_UNLCK, 0);
+	close(pid_fd);
+}
+
+
+void pidfile_delete(char *pidfile)
+{
+	if (pidfile) unlink(pidfile);
+}
+
+
diff --git a/release/src/router/busybox/networking/udhcp/pidfile.h b/release/src/router/busybox/networking/udhcp/pidfile.h
new file mode 100644
index 00000000..0e2b148a
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/pidfile.h
@@ -0,0 +1,26 @@
+/* pidfile.h
+ *
+ * Functions to assist in the writing and removing of pidfiles.
+ *
+ * Russ Dill <Russ.Dill@asu.edu> Soptember 2001
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+int pidfile_acquire(char *pidfile);
+void pidfile_write_release(int pid_fd);
+void pidfile_delete(char *pidfile);
+
diff --git a/release/src/router/busybox/networking/udhcp/script.c b/release/src/router/busybox/networking/udhcp/script.c
new file mode 100644
index 00000000..41b680d6
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/script.c
@@ -0,0 +1,243 @@
+/* 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 "options.h"
+#include "dhcpd.h"
+#include "dhcpc.h"
+#include "options.h"
+#include "common.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, unsigned char *ip)
+{
+	return sprintf(dest, "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
+}
+
+static void asprintip(char **dest, char *pre, unsigned char *ip)
+{
+	asprintf(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, unsigned char *option, struct dhcp_option *type_p)
+{
+	int type, optlen;
+	u_int16_t val_u16;
+	int16_t val_s16;
+	u_int32_t val_u32;
+	int32_t val_s32;
+	int len = option[OPT_LEN - 2];
+
+	dest += sprintf(dest, "%s=", type_p->name);
+
+	type = type_p->flags & TYPE_MASK;
+	optlen = option_lengths[type];
+	for(;;) {
+		switch (type) {
+		case OPTION_IP_PAIR:
+			dest += sprintip(dest, option);
+			*(dest++) = '/';
+			option += 4;
+			optlen = 4;
+		case OPTION_IP:	/* Works regardless of host byte order. */
+			dest += sprintip(dest, option);
+ 			break;
+		case OPTION_BOOLEAN:
+			dest += sprintf(dest, *option ? "yes" : "no");
+			break;
+		case OPTION_U8:
+			dest += sprintf(dest, "%u", *option);
+			break;
+		case OPTION_U16:
+			memcpy(&val_u16, option, 2);
+			dest += sprintf(dest, "%u", ntohs(val_u16));
+			break;
+		case OPTION_S16:
+			memcpy(&val_s16, option, 2);
+			dest += sprintf(dest, "%d", ntohs(val_s16));
+			break;
+		case OPTION_U32:
+			memcpy(&val_u32, option, 4);
+			dest += sprintf(dest, "%lu", (unsigned long) ntohl(val_u32));
+			break;
+		case OPTION_S32:
+			memcpy(&val_s32, option, 4);
+			dest += sprintf(dest, "%ld", (long) ntohl(val_s32));
+			break;
+		case OPTION_STRING:
+			memcpy(dest, option, len);
+			dest[len] = '\0';
+			return;	 /* Short circuit this case */
+		}
+		option += optlen;
+		len -= optlen;
+		if (len <= 0) break;
+		dest += sprintf(dest, " ");
+	}
+}
+
+
+static char *find_env(const char *prefix, char *defaultstr)
+{
+	char *ptr;
+
+	ptr = getenv(prefix);
+	return ptr ? ptr : defaultstr;
+}
+
+
+/* put all the paramaters into an environment */
+static char **fill_envp(struct dhcpMessage *packet)
+{
+	int num_options = 0;
+	int i, j;
+	char **envp;
+	unsigned char *temp;
+	struct in_addr subnet;
+	char over = 0;
+
+	if (packet == NULL)
+		num_options = 0;
+	else {
+		for (i = 0; options[i].code; i++)
+			if (get_option(packet, options[i].code))
+				num_options++;
+		if (packet->siaddr) num_options++;
+		if ((temp = get_option(packet, DHCP_OPTION_OVER)))
+			over = *temp;
+		if (!(over & FILE_FIELD) && packet->file[0]) num_options++;
+		if (!(over & SNAME_FIELD) && packet->sname[0]) num_options++;		
+	}
+	
+	envp = xmalloc((num_options + 5) * sizeof(char *));
+	j = 0;
+	asprintf(&envp[j++], "interface=%s", client_config.interface);
+	envp[j++] = find_env("PATH", "PATH=/bin:/usr/bin:/sbin:/usr/sbin");
+	envp[j++] = find_env("HOME", "HOME=/");
+
+	if (packet == NULL) {
+		envp[j++] = NULL;
+		return envp;
+	}
+
+	asprintip(&envp[j++], "ip=", (unsigned char *) &packet->yiaddr);
+
+
+	for (i = 0; options[i].code; i++) {
+		if (!(temp = get_option(packet, options[i].code)))
+			continue;
+		envp[j] = xmalloc(upper_length(temp[OPT_LEN - 2], options[i].flags & TYPE_MASK) + strlen(options[i].name) + 2);
+		fill_options(envp[j++], temp, &options[i]);
+
+		/* Fill in a subnet bits option for things like /24 */
+		if (options[i].code == DHCP_SUBNET) {
+			memcpy(&subnet, temp, 4);
+			asprintf(&envp[j++], "mask=%d", mton(&subnet));
+		}
+	}
+	if (packet->siaddr) {
+		asprintip(&envp[j++], "siaddr=", (unsigned char *) &packet->siaddr);
+	}
+	if (!(over & FILE_FIELD) && packet->file[0]) {
+		/* watch out for invalid packets */
+		packet->file[sizeof(packet->file) - 1] = '\0';
+		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);
+	}	
+	envp[j] = NULL;
+	return envp;
+}
+
+
+/* Call a script with a par file and env vars */
+void run_script(struct dhcpMessage *packet, const char *name)
+{
+	int pid;
+	char **envp;
+
+	if (client_config.script == NULL)
+		return;
+
+	/* call script */
+	pid = fork();
+	if (pid) {
+		waitpid(pid, NULL, 0);
+		return;
+	} else if (pid == 0) {
+		envp = fill_envp(packet);
+		
+		/* close fd's? */
+		
+		/* exec script */
+		DEBUG(LOG_INFO, "execle'ing %s", client_config.script);
+		execle(client_config.script, client_config.script,
+		       name, NULL, envp);
+		LOG(LOG_ERR, "script %s failed: %m", client_config.script);
+		exit(1);
+	}			
+}
diff --git a/release/src/router/busybox/networking/udhcp/script.h b/release/src/router/busybox/networking/udhcp/script.h
new file mode 100644
index 00000000..87a20cc1
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/script.h
@@ -0,0 +1,6 @@
+#ifndef _SCRIPT_H
+#define _SCRIPT_H
+
+void run_script(struct dhcpMessage *packet, const char *name);
+
+#endif
diff --git a/release/src/router/busybox/networking/udhcp/serverpacket.c b/release/src/router/busybox/networking/udhcp/serverpacket.c
new file mode 100644
index 00000000..09682444
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/serverpacket.c
@@ -0,0 +1,258 @@
+/* serverpacket.c
+ *
+ * Constuct 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 "dhcpd.h"
+#include "options.h"
+#include "common.h"
+
+/* send a packet to giaddr using the kernel ip stack */
+static int send_packet_to_relay(struct dhcpMessage *payload)
+{
+	DEBUG(LOG_INFO, "Forwarding packet to relay");
+
+	return kernel_packet(payload, server_config.server, SERVER_PORT,
+			payload->giaddr, SERVER_PORT);
+}
+
+
+/* send a packet to a specific arp address and ip address by creating our own ip packet */
+static int send_packet_to_client(struct dhcpMessage *payload, int force_broadcast)
+{
+	unsigned char *chaddr;
+	u_int32_t ciaddr;
+	
+	if (force_broadcast) {
+		DEBUG(LOG_INFO, "broadcasting packet to client (NAK)");
+		ciaddr = INADDR_BROADCAST;
+		chaddr = MAC_BCAST_ADDR;
+	} else if (payload->ciaddr) {
+		DEBUG(LOG_INFO, "unicasting packet to client ciaddr");
+		ciaddr = payload->ciaddr;
+		chaddr = payload->chaddr;
+	} else if (ntohs(payload->flags) & BROADCAST_FLAG) {
+		DEBUG(LOG_INFO, "broadcasting packet to client (requested)");
+		ciaddr = INADDR_BROADCAST;
+		chaddr = MAC_BCAST_ADDR;
+	} else {
+		DEBUG(LOG_INFO, "unicasting packet to client yiaddr");
+		ciaddr = payload->yiaddr;
+		chaddr = payload->chaddr;
+	}
+	return raw_packet(payload, server_config.server, SERVER_PORT, 
+			ciaddr, CLIENT_PORT, chaddr, server_config.ifindex);
+}
+
+
+/* send a dhcp packet, if force broadcast is set, the packet will be broadcast to the client */
+static int send_packet(struct dhcpMessage *payload, int force_broadcast)
+{
+	int ret;
+
+	if (payload->giaddr)
+		ret = send_packet_to_relay(payload);
+	else ret = send_packet_to_client(payload, force_broadcast);
+	return ret;
+}
+
+
+static void init_packet(struct dhcpMessage *packet, struct dhcpMessage *oldpacket, char type)
+{
+	init_header(packet, type);
+	packet->xid = oldpacket->xid;
+	memcpy(packet->chaddr, oldpacket->chaddr, 16);
+	packet->flags = oldpacket->flags;
+	packet->giaddr = oldpacket->giaddr;
+	packet->ciaddr = oldpacket->ciaddr;
+	add_simple_option(packet->options, DHCP_SERVER_ID, server_config.server);
+}
+
+
+/* add in the bootp options */
+static void add_bootp_options(struct dhcpMessage *packet)
+{
+	packet->siaddr = server_config.siaddr;
+	if (server_config.sname)
+		strncpy(packet->sname, server_config.sname, sizeof(packet->sname) - 1);
+	if (server_config.boot_file)
+		strncpy(packet->file, server_config.boot_file, sizeof(packet->file) - 1);
+}
+	
+
+/* send a DHCP OFFER to a DHCP DISCOVER */
+int sendOffer(struct dhcpMessage *oldpacket)
+{
+	struct dhcpMessage packet;
+	struct dhcpOfferedAddr *lease = NULL;
+	u_int32_t req_align, lease_time_align = server_config.lease;
+	unsigned char *req, *lease_time;
+	struct option_set *curr;
+	struct in_addr addr;
+
+	init_packet(&packet, oldpacket, DHCPOFFER);
+	
+	/* ADDME: if static, short circuit */
+	/* the client is in our lease/offered table */
+	if ((lease = find_lease_by_chaddr(oldpacket->chaddr))) {
+		if (!lease_expired(lease)) 
+			lease_time_align = lease->expires - time(0);
+		packet.yiaddr = lease->yiaddr;
+		
+	/* Or the client has a requested ip */
+	} else if ((req = get_option(oldpacket, DHCP_REQUESTED_IP)) &&
+
+		   /* Don't look here (ugly hackish thing to do) */
+		   memcpy(&req_align, req, 4) &&
+
+		   /* and the ip is in the lease range */
+		   ntohl(req_align) >= ntohl(server_config.start) &&
+		   ntohl(req_align) <= ntohl(server_config.end) &&
+		   
+		   /* and its not already taken/offered */ /* ADDME: check that its not a static lease */
+		   ((!(lease = find_lease_by_yiaddr(req_align)) ||
+		   
+		   /* or its taken, but expired */ /* ADDME: or maybe in here */
+		   lease_expired(lease)))) {
+				packet.yiaddr = req_align; /* FIXME: oh my, is there a host using this IP? */
+
+	/* otherwise, find a free IP */ /*ADDME: is it a static lease? */
+	} else {
+		packet.yiaddr = find_address(0);
+		
+		/* try for an expired lease */
+		if (!packet.yiaddr) packet.yiaddr = find_address(1);
+	}
+	
+	if(!packet.yiaddr) {
+		LOG(LOG_WARNING, "no IP addresses to give -- OFFER abandoned");
+		return -1;
+	}
+	
+	if (!add_lease(packet.chaddr, packet.yiaddr, server_config.offer_time)) {
+		LOG(LOG_WARNING, "lease pool is full -- OFFER abandoned");
+		return -1;
+	}		
+
+	if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
+		memcpy(&lease_time_align, lease_time, 4);
+		lease_time_align = ntohl(lease_time_align);
+		if (lease_time_align > server_config.lease) 
+			lease_time_align = server_config.lease;
+	}
+
+	/* Make sure we aren't just using the lease time from the previous offer */
+	if (lease_time_align < server_config.min_lease) 
+		lease_time_align = server_config.lease;
+	/* ADDME: end of short circuit */		
+	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));
+
+	curr = server_config.options;
+	while (curr) {
+		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
+			add_option_string(packet.options, curr->data);
+		curr = curr->next;
+	}
+
+	add_bootp_options(&packet);
+	
+	addr.s_addr = packet.yiaddr;
+	LOG(LOG_INFO, "sending OFFER of %s", inet_ntoa(addr));
+	return send_packet(&packet, 0);
+}
+
+
+int sendNAK(struct dhcpMessage *oldpacket)
+{
+	struct dhcpMessage packet;
+
+	init_packet(&packet, oldpacket, DHCPNAK);
+	
+	DEBUG(LOG_INFO, "sending NAK");
+	return send_packet(&packet, 1);
+}
+
+
+int sendACK(struct dhcpMessage *oldpacket, u_int32_t yiaddr)
+{
+	struct dhcpMessage packet;
+	struct option_set *curr;
+	unsigned char *lease_time;
+	u_int32_t lease_time_align = server_config.lease;
+	struct in_addr addr;
+
+	init_packet(&packet, oldpacket, DHCPACK);
+	packet.yiaddr = yiaddr;
+	
+	if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
+		memcpy(&lease_time_align, lease_time, 4);
+		lease_time_align = ntohl(lease_time_align);
+		if (lease_time_align > server_config.lease) 
+			lease_time_align = server_config.lease;
+		else if (lease_time_align < server_config.min_lease) 
+			lease_time_align = server_config.lease;
+	}
+	
+	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));
+	
+	curr = server_config.options;
+	while (curr) {
+		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
+			add_option_string(packet.options, curr->data);
+		curr = curr->next;
+	}
+
+	add_bootp_options(&packet);
+
+	addr.s_addr = packet.yiaddr;
+	LOG(LOG_INFO, "sending ACK to %s", inet_ntoa(addr));
+
+	if (send_packet(&packet, 0) < 0) 
+		return -1;
+
+	add_lease(packet.chaddr, packet.yiaddr, lease_time_align);
+
+	return 0;
+}
+
+
+int send_inform(struct dhcpMessage *oldpacket)
+{
+	struct dhcpMessage packet;
+	struct option_set *curr;
+
+	init_packet(&packet, oldpacket, DHCPACK);
+	
+	curr = server_config.options;
+	while (curr) {
+		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
+			add_option_string(packet.options, curr->data);
+		curr = curr->next;
+	}
+
+	add_bootp_options(&packet);
+
+	return send_packet(&packet, 0);
+}
diff --git a/release/src/router/busybox/networking/udhcp/serverpacket.h b/release/src/router/busybox/networking/udhcp/serverpacket.h
new file mode 100644
index 00000000..5a4fb276
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/serverpacket.h
@@ -0,0 +1,11 @@
+#ifndef _SERVERPACKET_H
+#define _SERVERPACKET_H
+
+
+int sendOffer(struct dhcpMessage *oldpacket);
+int sendNAK(struct dhcpMessage *oldpacket);
+int sendACK(struct dhcpMessage *oldpacket, u_int32_t yiaddr);
+int send_inform(struct dhcpMessage *oldpacket);
+
+
+#endif
diff --git a/release/src/router/busybox/networking/udhcp/socket.c b/release/src/router/busybox/networking/udhcp/socket.c
new file mode 100644
index 00000000..a51a7436
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/socket.c
@@ -0,0 +1,155 @@
+/*
+ * 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
+#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"
+
+int read_interface(char *interface, int *ifindex, u_int32_t *addr, unsigned char *arp)
+{
+	int fd;
+	struct ifreq ifr;
+	struct sockaddr_in *our_ip;
+
+	memset(&ifr, 0, sizeof(struct ifreq));
+	if((fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) >= 0) {
+		ifr.ifr_addr.sa_family = AF_INET;
+		strcpy(ifr.ifr_name, interface);
+
+		if (addr) { 
+			if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
+				our_ip = (struct sockaddr_in *) &ifr.ifr_addr;
+				*addr = our_ip->sin_addr.s_addr;
+				DEBUG(LOG_INFO, "%s (our ip) = %s", ifr.ifr_name, inet_ntoa(our_ip->sin_addr));
+			} else {
+				LOG(LOG_ERR, "SIOCGIFADDR failed, is the interface up and configured?: %m");
+				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");
+			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");
+			return -1;
+		}
+	} else {
+		LOG(LOG_ERR, "socket failed!: %m");
+		return -1;
+	}
+	close(fd);
+	return 0;
+}
+
+
+int listen_socket(unsigned int ip, int port, char *inf)
+{
+	struct ifreq interface;
+	int fd;
+	struct sockaddr_in addr;
+	int n = 1;
+
+	DEBUG(LOG_INFO, "Opening listen socket on 0x%08x:%d %s\n", ip, port, inf);
+	if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
+		DEBUG(LOG_ERR, "socket call failed: %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_ifrn.ifrn_name, inf, IFNAMSIZ);
+	if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,(char *)&interface, sizeof(interface)) < 0) {
+		close(fd);
+		return -1;
+	}
+
+	if (bind(fd, (struct sockaddr *)&addr, sizeof(struct sockaddr)) == -1) {
+		close(fd);
+		return -1;
+	}
+	
+	return fd;
+}
+
+
+int raw_socket(int ifindex)
+{
+	int fd;
+	struct sockaddr_ll sock;
+
+	DEBUG(LOG_INFO, "Opening raw socket on ifindex %d\n", ifindex);
+	if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
+		DEBUG(LOG_ERR, "socket call failed: %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/release/src/router/busybox/networking/udhcp/socket.h b/release/src/router/busybox/networking/udhcp/socket.h
new file mode 100644
index 00000000..333994b8
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/socket.h
@@ -0,0 +1,9 @@
+/* socket.h */
+#ifndef _SOCKET_H
+#define _SOCKET_H
+
+int read_interface(char *interface, int *ifindex, u_int32_t *addr, unsigned char *arp);
+int listen_socket(unsigned int ip, int port, char *inf);
+int raw_socket(int ifindex);
+
+#endif
diff --git a/release/src/router/busybox/networking/udhcp/version.h b/release/src/router/busybox/networking/udhcp/version.h
new file mode 100644
index 00000000..3862539f
--- /dev/null
+++ b/release/src/router/busybox/networking/udhcp/version.h
@@ -0,0 +1,6 @@
+#ifndef _UDHCP_VERSION_H
+#define _UDHCP_VERSION_H
+
+#define VERSION "0.9.9-pre"
+
+#endif