mirror of https://github.com/mirror/busybox.git
remove in place of external link
Mike Frysinger
parent
e0fe937593
commit
787140df39
|
|
@ -1,13 +0,0 @@
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|||
udhcp server/client package
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||||
-----------------------
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||||
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||||
Russ Dill <Russ.Dill@asu.edu>
|
||||
Matthew Ramsay <matthewr@moreton.com.au>
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||||
Chris Trew <christ@moreton.com.au>
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||||
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||||
Other Credits:
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||||
--------------
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||||
Moreton Bay (http://www.moretonbay.com/)
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||||
Vladimir Oleynik <dzo@simtrea.ru> Size optimizations
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||||
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||||
|
|
@ -1,339 +0,0 @@
|
|||
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
|
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|
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your programs, too.
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|
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When we speak of free software, we are referring to freedom, not
|
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To protect your rights, we need to make restrictions that forbid
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GNU GENERAL PUBLIC LICENSE
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TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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|
||||
END OF TERMS AND CONDITIONS
|
||||
|
||||
Appendix: How to Apply These Terms to Your New Programs
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||||
|
||||
If you develop a new program, and you want it to be of the greatest
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||||
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|
||||
To do so, attach the following notices to the program. It is safest
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Copyright (C) 19yy <name of author>
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|
||||
This program is free software; you can redistribute it and/or modify
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This program is distributed in the hope that it will be useful,
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||||
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||||
Also add information on how to contact you by electronic and paper mail.
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||||
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||||
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||||
|
||||
Gnomovision version 69, Copyright (C) 19yy name of author
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||||
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|
||||
This is free software, and you are welcome to redistribute it
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||||
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||||
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||||
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||||
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|
||||
You should also get your employer (if you work as a programmer) or your
|
||||
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|
||||
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|
||||
|
||||
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
|
||||
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|
||||
consider it more useful to permit linking proprietary applications with the
|
||||
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|
||||
Public License instead of this License.
|
||||
|
|
@ -1,260 +0,0 @@
|
|||
0.9.9 (pending)
|
||||
+ Various other size optimizations (Vladimir)
|
||||
+ Change strerror(errno) to %m (Vladimir N. Oleynik <dzo@simtreas.ru>)
|
||||
+ Fixed a little endian problem in mton (Bastian Blank <waldi@debian.org>)
|
||||
+ Fixed a arpping alignment problem (Rui He <rhe@3eti.com>)
|
||||
+ Added sanity check for max_leases (udhcp bug #1285) (me)
|
||||
+ Finally got rid of the trailing space in enviromental vars (me)
|
||||
+ added an new enviromental variable: $mask. It contains the number
|
||||
of subnet bits for tools like ip route that require it.
|
||||
(Bastian Blank <waldi@debian.org>, me)
|
||||
|
||||
0.9.8 (021031)
|
||||
+ split up README files (me)
|
||||
+ use /dev/urandom to seed xid's (instead of time(0)) (me)
|
||||
+ fixed renew behavior (me)
|
||||
+ udhcp now fits nicely into busybox
|
||||
(Glenn McGrath <bug1@iinet.net.au> as well as myself)
|
||||
+ updated client manpage (me)
|
||||
+ both client and server now use sockets for signal handling,
|
||||
hopefully, this will be the last needed change in signal
|
||||
handling, I'm fairly certain all the possible races are now
|
||||
closed. (me)
|
||||
+ The server now restarts the auto_time timer when it receives
|
||||
a SIGUSR1 (write out config file). (me)
|
||||
+ Improve signal handling (David Poole)
|
||||
+ Fix to config file parsing (Matt Kraai)
|
||||
+ Fix load lease logic (me)
|
||||
+ Fix clear_lease logic (me)
|
||||
+ -h is now an alias for -H (udhcp bug #1253)
|
||||
+ Shorter timeout on not receiving offers (me)
|
||||
+ Improved signal behavior by client (me)
|
||||
+ Would never assign end address (Keith Smith <keith@ksmith.com>)
|
||||
+ Was improperly reporting yiaddr as siaddr (ben-udhcp@bdlow.net)
|
||||
udhcp bug#1256
|
||||
+ Fixed reading of client id (David Poole <davep@portsmith.com>)
|
||||
+ change sys_errlist[] to strerror() as it aparently doesn't exist
|
||||
(Erik Andersen <andersee@codepoet.org>)
|
||||
+ fixed get_raw_packet so it returns -2 on non fatal errors
|
||||
(Ted Lemon <Ted.Lemon@nominum.com>)
|
||||
+ Improved (hopefully) NAKing behavior (me)
|
||||
+ Added -b option (Jouni Malinen)
|
||||
+ Compute checksums correctly on big endian hosts
|
||||
(Jouni Malinen <jkmaline@cc.hut.fi>)
|
||||
|
||||
0.9.7 (020526)
|
||||
+ Use add_lease in read_leases, sanitizes leases more, and clears out exprired
|
||||
ones if there is no more room (me)
|
||||
+ Moved udhcpd.leases to /var/lib/misc/udhcpd.leases (Debian bug #147747)
|
||||
+ Change (obsolete) AF_INET in arping.c to PF_PACKET (Debian bug #127049)
|
||||
+ Added script hook for DHCPNAK (nak), as well as providing the message option
|
||||
(me)
|
||||
+ Generate the paramaters request list by seeing what options in options.c are
|
||||
ored with OPTION_REQ in options.c
|
||||
+ Fix dhcp renew forgetfullness on client (bug #1230)
|
||||
+ Fix dhcp release bug on client (bug #1231)
|
||||
+ Set option request list for DHCP renew (bug #1233)
|
||||
+ Set BOOTREQUEST/REPLY properly
|
||||
+ Change client-identifier field to popularly expected behavior (me)
|
||||
+ Only reopen port on errors (me)
|
||||
+ Change fork/close/setsid structures to daemon() (me)
|
||||
+ Allow user to specify udhcpd config file at run time (Steven, me)
|
||||
+ Write pidfile after changing it (Steven CTR Carr <Steven.CTR.Carr@tc.faa.gov>)
|
||||
+ Added env var docs to udhcpc man page (Matt)
|
||||
+ Standardized lowercase udhcp in documentation (me)
|
||||
+ Accept packets without a UDP checksum (me)
|
||||
+ Accept packets with extra garbage (me)
|
||||
+ Better error handling in files.c (me)
|
||||
+ Combined read_interface function to reduce COMBINED_BINARY size (me)
|
||||
+ Drop calc_length(), some servers choke on smaller packets (me)
|
||||
+ Try to clean some fat out (me)
|
||||
|
||||
0.9.6 (011001)
|
||||
+ Added bootp paramaters to server (me)
|
||||
+ Added bootp paramaters to client (me)
|
||||
+ Added vendor id to client (me)
|
||||
+ Better pidfile handling in client and server (me)
|
||||
+ Added man pages (Matt Kraai <kraai@alumni.carnegiemellon.edu>)
|
||||
|
||||
0.9.5 (010914)
|
||||
+ Fixed $HOME and $PATH env passing (me)
|
||||
+ Fixed client to only listen for raw packets on correct interface (me)
|
||||
+ added --quit,-q option to quit after a lease is obtained (me)
|
||||
+ Fixed 100% CPU utilization by client when interface is down (me)
|
||||
|
||||
0.9.4 (010827)
|
||||
+ Force broadcast to broken clients that request unicast (ie, MSFT 98)
|
||||
+ Make install rules (Adam J. Richter <adam@yggdrasil.com>)
|
||||
+ One scripts, instead of many (Adam)
|
||||
+ Removed script paramater info files (env vars only) (Adam)
|
||||
+ Controlling of forking behavior in client (Adam)
|
||||
+ General script.c/dhcpc.c cleanups (Adam)
|
||||
|
||||
0.9.3 (010820)
|
||||
+ Increased debugging verbosity (me)
|
||||
+ Cut trailing whitespace when reading config file (me)
|
||||
+ added hostname option to client (me)
|
||||
+ fixed a strncpy bug in script.c (me)
|
||||
+ fixed a leaky socket in dhcpc.c (me)
|
||||
+ fixed a leaky socket in dhcpd.c (me)
|
||||
|
||||
0.9.2 (010810)
|
||||
+ Added raw sockets to client (me)
|
||||
+ alignment fixes (Mark Huang)
|
||||
+ compiler warning fixes (Mark Huang)
|
||||
+ client now sends parameter list (Mark Huang/me)
|
||||
+ added ipttl option
|
||||
+ Does now not request broadcast packets
|
||||
|
||||
0.9.1 (010806)
|
||||
+ Added udhcpc client
|
||||
+ reorganized functions/files
|
||||
+ listening socket now only binds to one interface
|
||||
|
||||
0.9.0 (010720) Major rewrite, current changes, goals:
|
||||
+ should not segfault on bogus packets.
|
||||
+ Options can be read from sname and file fields.
|
||||
+ supports all DHCP messages (release, decline, inform).
|
||||
+ IP block is now specified by a range of IP's.
|
||||
+ Leases file now contains lease time (relative, or absolute).
|
||||
+ Just about any DHCP option is now supported.
|
||||
+ DNS entries are no longer read from resolv.conf
|
||||
+ Lease file can be written periodically when the process receives a SIGUSR1
|
||||
+ arpping should be supported on all arches.
|
||||
+ support for DHCP relays.
|
||||
+ DHCP messages can be unicast if the client requests it.
|
||||
+ many, many, many other things.
|
||||
|
||||
0.8.29 (000323)
|
||||
+ stable(?) release
|
||||
|
||||
|
||||
0.8.28 (000323)
|
||||
+ removed alarm as it was causing server to go down
|
||||
+ removed debugging
|
||||
+ break down dhcpd.c into manageable files
|
||||
|
||||
|
||||
0.8.27 (000221)
|
||||
+ OFFER also sends gateway/subnet (for picky dhcp clients)
|
||||
+ multiple DNS now handled from resolv.conf if available
|
||||
+ multiple WINS (from dhcpd.conf)
|
||||
|
||||
0.8.25 (000120)
|
||||
+ now compiles *and* runs on a generic linux system
|
||||
tested with a windows 98 client and the sample config
|
||||
files in the samples directory.
|
||||
|
||||
0.8.24 (000117)
|
||||
+ makeiplist tool has basic functionality in place
|
||||
+ new sample config files
|
||||
+ route add -host 255.255.255.255 dev eth0 added for generic linux
|
||||
|
||||
0.8.23 (000117)
|
||||
+ NETtel specific fix for ignoring dhcp requests on 2nd interface
|
||||
|
||||
0.8.22 (000113)
|
||||
+ minor changes to compile under a generic linux system
|
||||
+ minor config file location changes for a generic linux system
|
||||
+ makeiplist fixes.. still incomplete.. but etting closer
|
||||
|
||||
0.8.21 (000113)
|
||||
+ now sends the correct server ip instead of hardcoded value
|
||||
+ minor debugging fixes for critical messages
|
||||
|
||||
0.8.20 (000106)
|
||||
+ cut out dhcp server checking.. this was causing dialout ppp
|
||||
sessions with idle time set to never time out.
|
||||
+ also removed the 10 second pause before launching.. as this
|
||||
was originally to stop it replying to a dhcp client
|
||||
on a NETtel which was really a bad way to do it in the
|
||||
first place :-)
|
||||
|
||||
0.8.19 (000104)
|
||||
+ fixes for route add -host on a machine that needs to run both
|
||||
a DHCP client and server (dual eth box)
|
||||
|
||||
0.8.18 (991220)
|
||||
|
||||
+ Race conditions fixed by disabling alarm whilst the server is busy
|
||||
+ Fixed continous clearing of the offered array so that it is only cleared
|
||||
when it is dirty - (could change the position of when dirty is set)
|
||||
|
||||
0.8.17 (991212)
|
||||
|
||||
- has problems clearing out the offered array
|
||||
|
||||
0.8.16 (991203)
|
||||
+ Non blocking error is changes to informational as it is not really
|
||||
an error
|
||||
|
||||
0.8.15 (991129)
|
||||
+ Servs the dns field 3 times (Nettel only) so that windows servers
|
||||
dont time out whilst nettel is booting
|
||||
|
||||
0.8.14 (991126)
|
||||
+ added owner check for the offered array so clean out time may be
|
||||
increased
|
||||
+ added new func to print out chadder/MAC
|
||||
|
||||
0.8.13 (991125)
|
||||
+ added win95 support (w95 changed xid halfway through conversation)
|
||||
+ had to change the offered array to use hardware addresses instead of xid
|
||||
+ fixed re offered bug
|
||||
+ added more debugging
|
||||
|
||||
0.8.12 (991111)
|
||||
+ debugging was real bad.. cleaned up a bit.. needs overhaul
|
||||
|
||||
|
||||
0.8.11 (991110)
|
||||
+ fixed up offeredAddr array to actually be used now!! offeredAddr is
|
||||
used to see if another simultaneous connecting client was offered
|
||||
an address that we are about to offer another client (multiple
|
||||
client bug)
|
||||
+ removed re_offered variable as it breaks multiple client support
|
||||
+ added lease time to ACK -- doesn't work if in OFFER
|
||||
+ decreased internal array clear delay to 60 seconds
|
||||
+ minor findAddr bug (returning -1 instead of 0)
|
||||
+ if clients xid already in offeredAddr offer the same addr and don't add a
|
||||
new addr to offered (caused by a client issuing multiple DISCOVERs)
|
||||
|
||||
0.8.10 (991105)
|
||||
+ \n bug in arpping
|
||||
+ minor debugging changes (removed printfs etc)
|
||||
+ started browseiplist (not finished)
|
||||
|
||||
0.8.9 (19991105)
|
||||
+ fixed options array size bug (options were cut off)
|
||||
|
||||
0.8.8 (19991105)
|
||||
+ ignores requests from dhcpcd on the same machine
|
||||
|
||||
0.8.7 (19991104)
|
||||
+ don't die if we can't bind to search for existing DHCP server
|
||||
+ slightly more verbose syslogging
|
||||
|
||||
0.8.6 (19991103)
|
||||
+ added makeiplist (not finished -- core dumps)
|
||||
+ minor debug changes
|
||||
|
||||
0.8.5 (19991029)
|
||||
+ exits if another DHCP server is already on the network
|
||||
+ added Linux Makefile
|
||||
|
||||
0.8.4 (19991026)
|
||||
+ minor bug fix in findaddr preventing an addr being found
|
||||
|
||||
0.8.3 (19991025)
|
||||
+ fixed up debugging
|
||||
+ minor hwaddr issues
|
||||
|
||||
0.8.2 (19991022)
|
||||
+ free leases (new arpping code from dhcpcd)
|
||||
+ fixed bug where crashes if no leases/iplist file
|
||||
+ syslogging and debugging switch
|
||||
+ serve DNS from resolv.conf
|
||||
+ fixed bug where new lease added if same mac offered
|
||||
+ now checks the ip is free b4 offering
|
||||
+ now supports wins server
|
||||
|
||||
|
|
@ -1,62 +0,0 @@
|
|||
#
|
||||
# For a description of the syntax of this configuration file,
|
||||
# see scripts/kbuild/config-language.txt.
|
||||
#
|
||||
|
||||
menu "udhcp Server/Client"
|
||||
|
||||
config CONFIG_UDHCPD
|
||||
bool "udhcp Server (udhcpd)"
|
||||
default n
|
||||
help
|
||||
uDHCPd is a DHCP server geared primarily toward embedded systems,
|
||||
while striving to be fully functional and RFC compliant.
|
||||
|
||||
See http://udhcp.busybox.net for further details.
|
||||
|
||||
config CONFIG_UDHCPC
|
||||
bool "udhcp Client (udhcpc)"
|
||||
default n
|
||||
help
|
||||
uDHCPc is a DHCP client geared primarily toward embedded systems,
|
||||
while striving to be fully functional and RFC compliant.
|
||||
|
||||
The udhcp client negotiates a lease with the DHCP server and
|
||||
notifies a set of scripts when a lease is obtained or lost.
|
||||
|
||||
See http://udhcp.busybox.net for further details.
|
||||
|
||||
config CONFIG_DUMPLEASES
|
||||
bool "Lease display utility (dumpleases)"
|
||||
default n
|
||||
depends on CONFIG_UDHCPD
|
||||
help
|
||||
dumpleases displays the leases written out by the udhcpd server.
|
||||
Lease times are stored in the file by time remaining in lease, or
|
||||
by the absolute time that it expires in seconds from epoch.
|
||||
|
||||
See http://udhcp.busybox.net for further details.
|
||||
|
||||
config CONFIG_FEATURE_UDHCP_SYSLOG
|
||||
bool " Log udhcp messages to syslog (instead of stdout)"
|
||||
default n
|
||||
depends on CONFIG_UDHCPD || CONFIG_UDHCPC
|
||||
help
|
||||
If selected, udhcpd will log all its messages to syslog, otherwise,
|
||||
it will attempt to log them to stdout.
|
||||
|
||||
See http://udhcp.busybox.net for further details.
|
||||
|
||||
config CONFIG_FEATURE_UDHCP_DEBUG
|
||||
bool " Compile udhcp with noisy debugging messages"
|
||||
default n
|
||||
depends on CONFIG_UDHCPD || CONFIG_UDHCPC
|
||||
help
|
||||
If selected, udhcpd will output extra debugging output. If using
|
||||
this option, compile uDHCP with "-g", and do not fork the daemon to
|
||||
the background.
|
||||
|
||||
See http://udhcp.busybox.net for further details.
|
||||
|
||||
endmenu
|
||||
|
||||
|
|
@ -1,5 +0,0 @@
|
|||
ifneq ($(wildcard ../../networking/Config.in),)
|
||||
include Makefile.busybox
|
||||
else
|
||||
include Makefile.udhcp
|
||||
endif
|
||||
|
|
@ -1,36 +0,0 @@
|
|||
# Makefile for busybox
|
||||
#
|
||||
# Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
||||
#
|
||||
# This program is free software; you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation; either version 2 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
# General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program; if not, write to the Free Software
|
||||
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
#
|
||||
|
||||
ifndef top_srcdir
|
||||
top_srcdir=../..
|
||||
endif
|
||||
ifndef top_builddir
|
||||
top_builddir=../..
|
||||
endif
|
||||
srcdir=$(top_srcdir)/networking/udhcp
|
||||
UDHCP_DIR:=./
|
||||
include $(top_builddir)/Rules.mak
|
||||
include $(top_builddir)/.config
|
||||
include Makefile.in
|
||||
all: $(libraries-y)
|
||||
-include $(top_builddir)/.depend
|
||||
|
||||
clean:
|
||||
rm -f *.o *.a $(AR_TARGET)
|
||||
|
||||
|
|
@ -1,53 +0,0 @@
|
|||
# Makefile for busybox
|
||||
#
|
||||
# Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
||||
#
|
||||
# Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
||||
#
|
||||
|
||||
UDHCP_AR:=udhcp.a
|
||||
ifndef $(UDHCP_DIR)
|
||||
UDHCP_DIR:=$(top_builddir)/networking/udhcp/
|
||||
endif
|
||||
srcdir=$(top_srcdir)/networking/udhcp
|
||||
|
||||
#ok, so I forgot how to do an or, but this is a quick and dirty hack
|
||||
ifeq ($(strip $(CONFIG_UDHCPC)),y)
|
||||
CONFIG_UDHCP_SHARED=y
|
||||
else
|
||||
ifeq ($(strip $(CONFIG_UDHCPD)),y)
|
||||
CONFIG_UDHCP_SHARED=y
|
||||
else
|
||||
CONFIG_UDHCP_SHARED=n
|
||||
endif
|
||||
endif
|
||||
|
||||
UDHCP-y:=
|
||||
UDHCP-$(CONFIG_UDHCP_SHARED) += common.c options.c packet.c pidfile.c \
|
||||
signalpipe.c socket.c
|
||||
UDHCP-$(CONFIG_UDHCPC) += dhcpc.c clientpacket.c clientsocket.c \
|
||||
script.c
|
||||
UDHCP-$(CONFIG_UDHCPD) += dhcpd.c arpping.c files.c leases.c \
|
||||
serverpacket.c static_leases.c
|
||||
UDHCP-$(CONFIG_DUMPLEASES) += dumpleases.c
|
||||
UDHCP_OBJS:=$(patsubst %.c,$(UDHCP_DIR)%.o, $(UDHCP-y))
|
||||
|
||||
ifneq ($(strip $(UDHCP-y)),)
|
||||
libraries-y+=$(UDHCP_DIR)$(UDHCP_AR)
|
||||
endif
|
||||
|
||||
UDHCP-y:=$(patsubst %,$(srcdir)/%,$(UDHCP-y))
|
||||
UDHCP-a:=$(wildcard $(srcdir)/*.c)
|
||||
APPLET_SRC-y+=$(UDHCP-y)
|
||||
APPLET_SRC-a+=$(UDHCP-a)
|
||||
|
||||
UDHCP_INCLUDES:=$(srcdir)
|
||||
|
||||
APPLETS_DEFINE-y+=-DIN_BUSYBOX -I$(UDHCP_INCLUDES)
|
||||
APPLETS_DEFINE-a+=-DIN_BUSYBOX -I$(UDHCP_INCLUDES)
|
||||
|
||||
$(UDHCP_DIR)$(UDHCP_AR): $(UDHCP_OBJS)
|
||||
$(do_ar)
|
||||
|
||||
$(UDHCP_OBJS): $(UDHCP_DIR)%.o : $(srcdir)/%.c
|
||||
$(compile.c) -DIN_BUSYBOX
|
||||
|
|
@ -1,53 +0,0 @@
|
|||
udhcp server/client package readme
|
||||
-------------------------
|
||||
|
||||
The udhcp server/client package is primarily geared towards embedded
|
||||
systems. It does however, strive to be fully functional, and RFC
|
||||
compliant.
|
||||
|
||||
|
||||
compile time options
|
||||
-------------------
|
||||
|
||||
The Makefile contains three of the compile time options:
|
||||
|
||||
UDHCP_DEBUG: If UDHCP_DEBUG is defined, udhcpd will output extra
|
||||
debugging output, compile with -g, and not fork to the background when
|
||||
run.
|
||||
UDHCP_SYSLOG: If UDHCP_SYSLOG is defined, udhcpd will log all its
|
||||
messages syslog, otherwise, it will attempt to log them to stdout.
|
||||
|
||||
COMBINED_BINARY: If COMBINED_BINARY is define, one binary, udhcpd,
|
||||
is created. If called as udhcpd, the dhcp server will be started.
|
||||
If called as udhcpc, the dhcp client will be started.
|
||||
|
||||
dhcpd.h contains the other three compile time options:
|
||||
|
||||
LEASE_TIME: The default lease time if not specified in the config
|
||||
file.
|
||||
|
||||
LEASES_FILE: The default file for storing leases.
|
||||
|
||||
DHCPD_CONFIG_FILE: The defualt config file to use.
|
||||
|
||||
options.c contains a set of dhcp options for the client:
|
||||
|
||||
name[10]: The name of the option as it will appear in scripts
|
||||
|
||||
flags: The type of option, as well as if it will be requested
|
||||
by the client (OPTION_REQ)
|
||||
|
||||
code: The DHCP code for this option
|
||||
|
||||
|
||||
busybox drop-in
|
||||
--------------
|
||||
udhcp is now a drop-in component for busybox (http://busybox.net).
|
||||
To update busybox to the latest revision, simply do a:
|
||||
|
||||
cp *.[ch] README AUTHORS COPYING ChangeLog TODO \
|
||||
<busybox_source>/networking/udhcp
|
||||
|
||||
The only two files udhcp does not provide are config.in and
|
||||
Makefile.in, so these may need to be updated from time to time.
|
||||
|
||||
|
|
@ -1,17 +0,0 @@
|
|||
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.
|
||||
|
||||
|
|
@ -1,144 +0,0 @@
|
|||
udhcp client (udhcpc)
|
||||
--------------------
|
||||
|
||||
The udhcp client negotiates a lease with the DHCP server and notifies
|
||||
a set of scripts when a leases is obtained or lost.
|
||||
|
||||
|
||||
command line options
|
||||
-------------------
|
||||
|
||||
The command line options for the udhcp client are:
|
||||
|
||||
-c, --clientid=CLIENTID Set client identifier. Type is first char.
|
||||
-C, --clientid-none Suppress default client identifier
|
||||
-V, --vendorclass=CLASSID Set vendor class identifier
|
||||
-H, --hostname=HOSTNAME Client hostname
|
||||
-h, Alias for -H
|
||||
-F, --fqdn=FQDN Client fully qualified domain name
|
||||
-f, --foreground Do not fork after getting lease
|
||||
-b, --background Fork to background if lease cannot be
|
||||
immediately negotiated.
|
||||
-i, --interface=INTERFACE Interface to use (default: eth0)
|
||||
-n, --now Exit with failure if lease cannot be
|
||||
immediately negotiated.
|
||||
-p, --pidfile=file Store process ID of daemon in file
|
||||
-q, --quit Quit after obtaining lease
|
||||
-r, --request=IP IP address to request (default: none)
|
||||
-s, --script=file Run file at dhcp events (default:
|
||||
/usr/share/udhcpc/default.script)
|
||||
-v, --version Display version
|
||||
|
||||
|
||||
If the requested IP address cannot be obtained, the client accepts the
|
||||
address that the server offers.
|
||||
|
||||
|
||||
udhcp client scripts
|
||||
-------------------
|
||||
|
||||
When an event occurs, udhcpc calls the action script. udhcpc never does
|
||||
any configuration of the network interface itself, but instead relies on
|
||||
a set of scripts. The script by default is
|
||||
/usr/share/udhcpc/default.script but this can be changed via the command
|
||||
line arguments. The three possible arguments to the script are:
|
||||
|
||||
deconfig: This argument is used when udhcpc starts, and
|
||||
when a leases is lost. The script must put the interface in an
|
||||
up, but deconfigured state, ie: ifconfig $interface 0.0.0.0.
|
||||
|
||||
bound: This argument is used when udhcpc moves from an
|
||||
unbound, to a bound state. All of the paramaters are set in
|
||||
enviromental variables, The script should configure the interface,
|
||||
and set any other relavent parameters (default gateway, dns server,
|
||||
etc).
|
||||
|
||||
renew: This argument is used when a DHCP lease is renewed. All of
|
||||
the paramaters are set in enviromental variables. This argument is
|
||||
used when the interface is already configured, so the IP address,
|
||||
will not change, however, the other DHCP paramaters, such as the
|
||||
default gateway, subnet mask, and dns server may change.
|
||||
|
||||
nak: This argument is used with udhcpc receives a NAK message.
|
||||
The script with the deconfig argument will be called directly
|
||||
afterwards, so no changes to the network interface are neccessary.
|
||||
This hook is provided for purely informational purposes (the
|
||||
message option may contain a reason for the NAK).
|
||||
|
||||
The paramaters for enviromental variables are as follows:
|
||||
|
||||
$HOME - The set $HOME env or "/"
|
||||
$PATH - the set $PATH env or "/bin:/usr/bin:/sbin:/usr/sbin"
|
||||
$1 - What action the script should perform
|
||||
interface - The interface this was obtained on
|
||||
ip - The obtained IP
|
||||
mask - The number of bits in the netmask (ie: 24)
|
||||
siaddr - The bootp next server option
|
||||
sname - The bootp server name option
|
||||
boot_file - The bootp boot file option
|
||||
subnet - The assigend subnet mask
|
||||
timezone - Offset in seconds from UTC
|
||||
router - A list of routers
|
||||
timesvr - A list of time servers
|
||||
namesvr - A list of IEN 116 name servers
|
||||
dns - A list of DNS server
|
||||
logsvr - A list of MIT-LCS UDP log servers
|
||||
cookiesvr - A list of RFC 865 cookie servers
|
||||
lprsvr - A list of LPR servers
|
||||
hostname - The assigned hostname
|
||||
bootsize - The length in 512 octect blocks of the bootfile
|
||||
domain - The domain name of the network
|
||||
swapsvr - The IP address of the client's swap server
|
||||
rootpath - The path name of the client's root disk
|
||||
ipttl - The TTL to use for this network
|
||||
mtu - The MTU to use for this network
|
||||
broadcast - The broadcast address for this network
|
||||
ntpsrv - A list of NTP servers
|
||||
wins - A list of WINS servers
|
||||
lease - The lease time, in seconds
|
||||
dhcptype - DHCP message type (safely ignored)
|
||||
serverid - The IP of the server
|
||||
message - Reason for a DHCPNAK
|
||||
tftp - The TFTP server name
|
||||
bootfile - The bootfile name
|
||||
|
||||
additional options are easily added in options.c.
|
||||
|
||||
|
||||
note on udhcpc's random seed
|
||||
---------------------------
|
||||
|
||||
udhcpc will seed its random number generator (used for generating xid's)
|
||||
by reading /dev/urandom. If you have a lot of embedded systems on the same
|
||||
network, with no entropy, you can either seed /dev/urandom by a method of
|
||||
your own, or doing the following on startup:
|
||||
|
||||
ifconfig eth0 > /dev/urandom
|
||||
|
||||
in order to seed /dev/urandom with some data (mac address) unique to your
|
||||
system. If reading /dev/urandom fails, udhcpc will fall back to its old
|
||||
behavior of seeding with time(0).
|
||||
|
||||
|
||||
signals accepted by udhcpc
|
||||
-------------------------
|
||||
|
||||
udhcpc also responds to SIGUSR1 and SIGUSR2. SIGUSR1 will force a renew state,
|
||||
and SIGUSR2 will force a release of the current lease, and cause udhcpc to
|
||||
go into an inactive state (until it is killed, or receives a SIGUSR1). You do
|
||||
not need to sleep between sending signals, as signals received are processed
|
||||
sequencially in the order they are received.
|
||||
|
||||
|
||||
compile time options
|
||||
-------------------
|
||||
|
||||
options.c contains a set of dhcp options for the client:
|
||||
|
||||
name[10]: The name of the option as it will appear in scripts
|
||||
|
||||
flags: The type of option, as well as if it will be requested
|
||||
by the client (OPTION_REQ)
|
||||
|
||||
code: The DHCP code for this option
|
||||
|
||||
|
|
@ -1,59 +0,0 @@
|
|||
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.
|
||||
|
|
@ -1,16 +0,0 @@
|
|||
TODO
|
||||
----
|
||||
+ Check for valid IP, netmask, hostname, paths, strings, etc
|
||||
+ Integrade README.*'s with manpages
|
||||
+ using time(0) breaks if the system clock changes, find a portable solution
|
||||
+ make failure of reading functions revert to previous value, not the default
|
||||
+ sanity code for option[OPT_LEN]
|
||||
+ fix aliasing (ie: eth0:0)
|
||||
+ better standard linux distro support
|
||||
+ make sure packet generation works on a wide varitey of arches
|
||||
+ Interoperability testing
|
||||
+ Hooks within the DHCP server
|
||||
* Server notification when a lease is added/removed
|
||||
+ Additional bootp support in client/server
|
||||
+ Make serverid option in server configurable
|
||||
+ Possibly add failure message to DHCP NAK
|
||||
|
|
@ -1,106 +0,0 @@
|
|||
/*
|
||||
* arpping.c
|
||||
*
|
||||
* Mostly stolen from: dhcpcd - DHCP client daemon
|
||||
* by Yoichi Hariguchi <yoichi@fore.com>
|
||||
*/
|
||||
|
||||
#include <sys/time.h>
|
||||
#include <time.h>
|
||||
#include <sys/socket.h>
|
||||
#include <netinet/if_ether.h>
|
||||
#include <net/if_arp.h>
|
||||
#include <netinet/in.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
#include <errno.h>
|
||||
|
||||
#include "dhcpd.h"
|
||||
#include "arpping.h"
|
||||
#include "common.h"
|
||||
|
||||
/* args: yiaddr - what IP to ping
|
||||
* ip - our ip
|
||||
* mac - our arp address
|
||||
* interface - interface to use
|
||||
* retn: 1 addr free
|
||||
* 0 addr used
|
||||
* -1 error
|
||||
*/
|
||||
|
||||
/* FIXME: match response against chaddr */
|
||||
int arpping(uint32_t yiaddr, uint32_t ip, uint8_t *mac, char *interface)
|
||||
{
|
||||
|
||||
int timeout = 2;
|
||||
int optval = 1;
|
||||
int s; /* socket */
|
||||
int rv = 1; /* return value */
|
||||
struct sockaddr addr; /* for interface name */
|
||||
struct arpMsg arp;
|
||||
fd_set fdset;
|
||||
struct timeval tm;
|
||||
time_t prevTime;
|
||||
|
||||
|
||||
if ((s = socket (PF_PACKET, SOCK_PACKET, htons(ETH_P_ARP))) == -1) {
|
||||
#ifdef IN_BUSYBOX
|
||||
LOG(LOG_ERR, bb_msg_can_not_create_raw_socket);
|
||||
#else
|
||||
LOG(LOG_ERR, "Could not open raw socket");
|
||||
#endif
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &optval, sizeof(optval)) == -1) {
|
||||
LOG(LOG_ERR, "Could not setsocketopt on raw socket");
|
||||
close(s);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* send arp request */
|
||||
memset(&arp, 0, sizeof(arp));
|
||||
memcpy(arp.h_dest, MAC_BCAST_ADDR, 6); /* MAC DA */
|
||||
memcpy(arp.h_source, mac, 6); /* MAC SA */
|
||||
arp.h_proto = htons(ETH_P_ARP); /* protocol type (Ethernet) */
|
||||
arp.htype = htons(ARPHRD_ETHER); /* hardware type */
|
||||
arp.ptype = htons(ETH_P_IP); /* protocol type (ARP message) */
|
||||
arp.hlen = 6; /* hardware address length */
|
||||
arp.plen = 4; /* protocol address length */
|
||||
arp.operation = htons(ARPOP_REQUEST); /* ARP op code */
|
||||
memcpy(arp.sInaddr, &ip, sizeof(ip)); /* source IP address */
|
||||
memcpy(arp.sHaddr, mac, 6); /* source hardware address */
|
||||
memcpy(arp.tInaddr, &yiaddr, sizeof(yiaddr)); /* target IP address */
|
||||
|
||||
memset(&addr, 0, sizeof(addr));
|
||||
strcpy(addr.sa_data, interface);
|
||||
if (sendto(s, &arp, sizeof(arp), 0, &addr, sizeof(addr)) < 0)
|
||||
rv = 0;
|
||||
|
||||
/* wait arp reply, and check it */
|
||||
tm.tv_usec = 0;
|
||||
prevTime = uptime();
|
||||
while (timeout > 0) {
|
||||
FD_ZERO(&fdset);
|
||||
FD_SET(s, &fdset);
|
||||
tm.tv_sec = timeout;
|
||||
if (select(s + 1, &fdset, (fd_set *) NULL, (fd_set *) NULL, &tm) < 0) {
|
||||
DEBUG(LOG_ERR, "Error on ARPING request: %m");
|
||||
if (errno != EINTR) rv = 0;
|
||||
} else if (FD_ISSET(s, &fdset)) {
|
||||
if (recv(s, &arp, sizeof(arp), 0) < 0 ) rv = 0;
|
||||
if (arp.operation == htons(ARPOP_REPLY) &&
|
||||
bcmp(arp.tHaddr, mac, 6) == 0 &&
|
||||
*((uint32_t *) arp.sInaddr) == yiaddr) {
|
||||
DEBUG(LOG_INFO, "Valid arp reply receved for this address");
|
||||
rv = 0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
timeout -= uptime() - prevTime;
|
||||
prevTime = uptime();
|
||||
}
|
||||
close(s);
|
||||
DEBUG(LOG_INFO, "%salid arp replies for this address", rv ? "No v" : "V");
|
||||
return rv;
|
||||
}
|
||||
|
|
@ -1,35 +0,0 @@
|
|||
/*
|
||||
* arpping .h
|
||||
*/
|
||||
|
||||
#ifndef ARPPING_H
|
||||
#define ARPPING_H
|
||||
|
||||
#include <netinet/if_ether.h>
|
||||
#include <net/if_arp.h>
|
||||
#include <net/if.h>
|
||||
#include <netinet/in.h>
|
||||
|
||||
struct arpMsg {
|
||||
/* Ethernet header */
|
||||
u_char h_dest[6]; /* destination ether addr */
|
||||
u_char h_source[6]; /* source ether addr */
|
||||
u_short h_proto; /* packet type ID field */
|
||||
|
||||
/* ARP packet */
|
||||
uint16_t htype; /* hardware type (must be ARPHRD_ETHER) */
|
||||
uint16_t ptype; /* protocol type (must be ETH_P_IP) */
|
||||
uint8_t hlen; /* hardware address length (must be 6) */
|
||||
uint8_t plen; /* protocol address length (must be 4) */
|
||||
uint16_t operation; /* ARP opcode */
|
||||
uint8_t sHaddr[6]; /* sender's hardware address */
|
||||
uint8_t sInaddr[4]; /* sender's IP address */
|
||||
uint8_t tHaddr[6]; /* target's hardware address */
|
||||
uint8_t tInaddr[4]; /* target's IP address */
|
||||
uint8_t pad[18]; /* pad for min. Ethernet payload (60 bytes) */
|
||||
} ATTRIBUTE_PACKED;
|
||||
|
||||
/* function prototypes */
|
||||
int arpping(uint32_t yiaddr, uint32_t ip, uint8_t *arp, char *interface);
|
||||
|
||||
#endif
|
||||
|
|
@ -1,245 +0,0 @@
|
|||
/* 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 "clientpacket.h"
|
||||
#include "options.h"
|
||||
#include "dhcpc.h"
|
||||
#include "common.h"
|
||||
|
||||
|
||||
/* Create a random xid */
|
||||
unsigned long random_xid(void)
|
||||
{
|
||||
static int initialized;
|
||||
if (!initialized) {
|
||||
int fd;
|
||||
unsigned long seed;
|
||||
|
||||
fd = open("/dev/urandom", 0);
|
||||
if (fd < 0 || read(fd, &seed, sizeof(seed)) < 0) {
|
||||
LOG(LOG_WARNING, "Could not load seed from /dev/urandom: %m");
|
||||
seed = time(0);
|
||||
}
|
||||
if (fd >= 0) close(fd);
|
||||
srand(seed);
|
||||
initialized++;
|
||||
}
|
||||
return rand();
|
||||
}
|
||||
|
||||
|
||||
/* initialize a packet with the proper defaults */
|
||||
static void init_packet(struct dhcpMessage *packet, char type)
|
||||
{
|
||||
init_header(packet, type);
|
||||
memcpy(packet->chaddr, client_config.arp, 6);
|
||||
if (client_config.clientid)
|
||||
add_option_string(packet->options, client_config.clientid);
|
||||
if (client_config.hostname) add_option_string(packet->options, client_config.hostname);
|
||||
if (client_config.fqdn) add_option_string(packet->options, client_config.fqdn);
|
||||
add_option_string(packet->options, client_config.vendorclass);
|
||||
}
|
||||
|
||||
|
||||
/* Add a parameter request list for stubborn DHCP servers. Pull the data
|
||||
* from the struct in options.c. Don't do bounds checking here because it
|
||||
* goes towards the head of the packet. */
|
||||
static void add_requests(struct dhcpMessage *packet)
|
||||
{
|
||||
int end = end_option(packet->options);
|
||||
int i, len = 0;
|
||||
|
||||
packet->options[end + OPT_CODE] = DHCP_PARAM_REQ;
|
||||
for (i = 0; dhcp_options[i].code; i++)
|
||||
if (dhcp_options[i].flags & OPTION_REQ)
|
||||
packet->options[end + OPT_DATA + len++] = dhcp_options[i].code;
|
||||
packet->options[end + OPT_LEN] = len;
|
||||
packet->options[end + OPT_DATA + len] = DHCP_END;
|
||||
|
||||
}
|
||||
|
||||
|
||||
/* Broadcast a DHCP discover packet to the network, with an optionally requested IP */
|
||||
int send_discover(unsigned long xid, unsigned long requested)
|
||||
{
|
||||
struct dhcpMessage packet;
|
||||
|
||||
init_packet(&packet, DHCPDISCOVER);
|
||||
packet.xid = xid;
|
||||
if (requested)
|
||||
add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
|
||||
|
||||
add_requests(&packet);
|
||||
LOG(LOG_DEBUG, "Sending discover...");
|
||||
return raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
|
||||
SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
|
||||
}
|
||||
|
||||
|
||||
/* Broadcasts a DHCP request message */
|
||||
int send_selecting(unsigned long xid, unsigned long server, unsigned long requested)
|
||||
{
|
||||
struct dhcpMessage packet;
|
||||
struct in_addr addr;
|
||||
|
||||
init_packet(&packet, DHCPREQUEST);
|
||||
packet.xid = xid;
|
||||
|
||||
add_simple_option(packet.options, DHCP_REQUESTED_IP, requested);
|
||||
add_simple_option(packet.options, DHCP_SERVER_ID, server);
|
||||
|
||||
add_requests(&packet);
|
||||
addr.s_addr = requested;
|
||||
LOG(LOG_DEBUG, "Sending select for %s...", inet_ntoa(addr));
|
||||
return raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
|
||||
SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
|
||||
}
|
||||
|
||||
|
||||
/* Unicasts or broadcasts a DHCP renew message */
|
||||
int send_renew(unsigned long xid, unsigned long server, unsigned long ciaddr)
|
||||
{
|
||||
struct dhcpMessage packet;
|
||||
int ret = 0;
|
||||
|
||||
init_packet(&packet, DHCPREQUEST);
|
||||
packet.xid = xid;
|
||||
packet.ciaddr = ciaddr;
|
||||
|
||||
add_requests(&packet);
|
||||
LOG(LOG_DEBUG, "Sending renew...");
|
||||
if (server)
|
||||
ret = kernel_packet(&packet, ciaddr, CLIENT_PORT, server, SERVER_PORT);
|
||||
else ret = raw_packet(&packet, INADDR_ANY, CLIENT_PORT, INADDR_BROADCAST,
|
||||
SERVER_PORT, MAC_BCAST_ADDR, client_config.ifindex);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
/* Unicasts a DHCP release message */
|
||||
int send_release(unsigned long server, unsigned long ciaddr)
|
||||
{
|
||||
struct dhcpMessage packet;
|
||||
|
||||
init_packet(&packet, DHCPRELEASE);
|
||||
packet.xid = random_xid();
|
||||
packet.ciaddr = ciaddr;
|
||||
|
||||
add_simple_option(packet.options, DHCP_REQUESTED_IP, ciaddr);
|
||||
add_simple_option(packet.options, DHCP_SERVER_ID, server);
|
||||
|
||||
LOG(LOG_DEBUG, "Sending release...");
|
||||
return kernel_packet(&packet, ciaddr, CLIENT_PORT, server, SERVER_PORT);
|
||||
}
|
||||
|
||||
|
||||
/* return -1 on errors that are fatal for the socket, -2 for those that aren't */
|
||||
int get_raw_packet(struct dhcpMessage *payload, int fd)
|
||||
{
|
||||
int bytes;
|
||||
struct udp_dhcp_packet packet;
|
||||
uint32_t source, dest;
|
||||
uint16_t check;
|
||||
|
||||
memset(&packet, 0, sizeof(struct udp_dhcp_packet));
|
||||
bytes = read(fd, &packet, sizeof(struct udp_dhcp_packet));
|
||||
if (bytes < 0) {
|
||||
DEBUG(LOG_INFO, "couldn't read on raw listening socket -- ignoring");
|
||||
usleep(500000); /* possible down interface, looping condition */
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (bytes < (int) (sizeof(struct iphdr) + sizeof(struct udphdr))) {
|
||||
DEBUG(LOG_INFO, "message too short, ignoring");
|
||||
return -2;
|
||||
}
|
||||
|
||||
if (bytes < ntohs(packet.ip.tot_len)) {
|
||||
DEBUG(LOG_INFO, "Truncated packet");
|
||||
return -2;
|
||||
}
|
||||
|
||||
/* ignore any extra garbage bytes */
|
||||
bytes = ntohs(packet.ip.tot_len);
|
||||
|
||||
/* Make sure its the right packet for us, and that it passes sanity checks */
|
||||
if (packet.ip.protocol != IPPROTO_UDP || packet.ip.version != IPVERSION ||
|
||||
packet.ip.ihl != sizeof(packet.ip) >> 2 || packet.udp.dest != htons(CLIENT_PORT) ||
|
||||
bytes > (int) sizeof(struct udp_dhcp_packet) ||
|
||||
ntohs(packet.udp.len) != (uint16_t) (bytes - sizeof(packet.ip))) {
|
||||
DEBUG(LOG_INFO, "unrelated/bogus packet");
|
||||
return -2;
|
||||
}
|
||||
|
||||
/* check IP checksum */
|
||||
check = packet.ip.check;
|
||||
packet.ip.check = 0;
|
||||
if (check != checksum(&(packet.ip), sizeof(packet.ip))) {
|
||||
DEBUG(LOG_INFO, "bad IP header checksum, ignoring");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* verify the UDP checksum by replacing the header with a psuedo header */
|
||||
source = packet.ip.saddr;
|
||||
dest = packet.ip.daddr;
|
||||
check = packet.udp.check;
|
||||
packet.udp.check = 0;
|
||||
memset(&packet.ip, 0, sizeof(packet.ip));
|
||||
|
||||
packet.ip.protocol = IPPROTO_UDP;
|
||||
packet.ip.saddr = source;
|
||||
packet.ip.daddr = dest;
|
||||
packet.ip.tot_len = packet.udp.len; /* cheat on the psuedo-header */
|
||||
if (check && check != checksum(&packet, bytes)) {
|
||||
DEBUG(LOG_ERR, "packet with bad UDP checksum received, ignoring");
|
||||
return -2;
|
||||
}
|
||||
|
||||
memcpy(payload, &(packet.data), bytes - (sizeof(packet.ip) + sizeof(packet.udp)));
|
||||
|
||||
if (ntohl(payload->cookie) != DHCP_MAGIC) {
|
||||
LOG(LOG_ERR, "received bogus message (bad magic) -- ignoring");
|
||||
return -2;
|
||||
}
|
||||
DEBUG(LOG_INFO, "oooooh!!! got some!");
|
||||
return bytes - (sizeof(packet.ip) + sizeof(packet.udp));
|
||||
|
||||
}
|
||||
|
|
@ -1,14 +0,0 @@
|
|||
#ifndef _CLIENTPACKET_H
|
||||
#define _CLIENTPACKET_H
|
||||
|
||||
#include "packet.h"
|
||||
|
||||
unsigned long random_xid(void);
|
||||
int send_discover(unsigned long xid, unsigned long requested);
|
||||
int send_selecting(unsigned long xid, unsigned long server, unsigned long requested);
|
||||
int send_renew(unsigned long xid, unsigned long server, unsigned long ciaddr);
|
||||
int send_renew(unsigned long xid, unsigned long server, unsigned long ciaddr);
|
||||
int send_release(unsigned long server, unsigned long ciaddr);
|
||||
int get_raw_packet(struct dhcpMessage *payload, int fd);
|
||||
|
||||
#endif
|
||||
|
|
@ -1,62 +0,0 @@
|
|||
/*
|
||||
* clientsocket.c -- DHCP client socket creation
|
||||
*
|
||||
* udhcp client
|
||||
*
|
||||
* Russ Dill <Russ.Dill@asu.edu> July 2001
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <sys/socket.h>
|
||||
#include <unistd.h>
|
||||
#include <netinet/in.h>
|
||||
#include <features.h>
|
||||
#if __GLIBC__ >=2 && __GLIBC_MINOR >= 1
|
||||
#include <netpacket/packet.h>
|
||||
#include <net/ethernet.h>
|
||||
#else
|
||||
#include <asm/types.h>
|
||||
#include <linux/if_packet.h>
|
||||
#include <linux/if_ether.h>
|
||||
#endif
|
||||
|
||||
#include "clientsocket.h"
|
||||
#include "common.h"
|
||||
|
||||
|
||||
int raw_socket(int ifindex)
|
||||
{
|
||||
int fd;
|
||||
struct sockaddr_ll sock;
|
||||
|
||||
DEBUG(LOG_INFO, "Opening raw socket on ifindex %d", ifindex);
|
||||
if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
|
||||
DEBUG(LOG_ERR, "socket call failed: %m");
|
||||
return -1;
|
||||
}
|
||||
|
||||
sock.sll_family = AF_PACKET;
|
||||
sock.sll_protocol = htons(ETH_P_IP);
|
||||
sock.sll_ifindex = ifindex;
|
||||
if (bind(fd, (struct sockaddr *) &sock, sizeof(sock)) < 0) {
|
||||
DEBUG(LOG_ERR, "bind call failed: %m");
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return fd;
|
||||
}
|
||||
|
|
@ -1,7 +0,0 @@
|
|||
/* clientsocket.h */
|
||||
#ifndef _CLIENTSOCKET_H
|
||||
#define _CLIENTSOCKET_H
|
||||
|
||||
int raw_socket(int ifindex);
|
||||
|
||||
#endif
|
||||
|
|
@ -1,162 +0,0 @@
|
|||
/* common.c
|
||||
*
|
||||
* Functions for debugging and logging as well as some other
|
||||
* simple helper functions.
|
||||
*
|
||||
* Russ Dill <Russ.Dill@asu.edu> 2001-2003
|
||||
* Rewritten by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
|
||||
*
|
||||
* 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 <paths.h>
|
||||
#include <sys/socket.h>
|
||||
#include <stdarg.h>
|
||||
|
||||
#include "common.h"
|
||||
#include "pidfile.h"
|
||||
|
||||
|
||||
static int daemonized;
|
||||
|
||||
long uptime(void)
|
||||
{
|
||||
struct sysinfo info;
|
||||
sysinfo(&info);
|
||||
return info.uptime;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* This function makes sure our first socket calls
|
||||
* aren't going to fd 1 (printf badness...) and are
|
||||
* not later closed by daemon()
|
||||
*/
|
||||
static inline void sanitize_fds(void)
|
||||
{
|
||||
int zero;
|
||||
if ((zero = open(_PATH_DEVNULL, O_RDWR, 0)) < 0) return;
|
||||
while (zero < 3) zero = dup(zero);
|
||||
close(zero);
|
||||
}
|
||||
|
||||
|
||||
void background(const char *pidfile)
|
||||
{
|
||||
#ifdef __uClinux__
|
||||
LOG(LOG_ERR, "Cannot background in uclinux (yet)");
|
||||
#else /* __uClinux__ */
|
||||
int pid_fd;
|
||||
|
||||
/* hold lock during fork. */
|
||||
pid_fd = pidfile_acquire(pidfile);
|
||||
if (daemon(0, 0) == -1) {
|
||||
perror("fork");
|
||||
exit(1);
|
||||
}
|
||||
daemonized++;
|
||||
pidfile_write_release(pid_fd);
|
||||
#endif /* __uClinux__ */
|
||||
}
|
||||
|
||||
|
||||
#ifdef UDHCP_SYSLOG
|
||||
void udhcp_logging(int level, const char *fmt, ...)
|
||||
{
|
||||
va_list p;
|
||||
va_list p2;
|
||||
|
||||
va_start(p, fmt);
|
||||
__va_copy(p2, p);
|
||||
if(!daemonized) {
|
||||
vprintf(fmt, p);
|
||||
putchar('\n');
|
||||
}
|
||||
vsyslog(level, fmt, p2);
|
||||
va_end(p);
|
||||
}
|
||||
|
||||
|
||||
void start_log_and_pid(const char *client_server, const char *pidfile)
|
||||
{
|
||||
int pid_fd;
|
||||
|
||||
/* Make sure our syslog fd isn't overwritten */
|
||||
sanitize_fds();
|
||||
|
||||
/* do some other misc startup stuff while we are here to save bytes */
|
||||
pid_fd = pidfile_acquire(pidfile);
|
||||
pidfile_write_release(pid_fd);
|
||||
|
||||
/* equivelent of doing a fflush after every \n */
|
||||
setlinebuf(stdout);
|
||||
|
||||
openlog(client_server, 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, ...)
|
||||
{
|
||||
va_list p;
|
||||
|
||||
va_start(p, fmt);
|
||||
if(!daemonized) {
|
||||
printf("%s, ", syslog_level_msg[level]);
|
||||
vprintf(fmt, p);
|
||||
putchar('\n');
|
||||
}
|
||||
va_end(p);
|
||||
}
|
||||
|
||||
|
||||
void start_log_and_pid(const char *client_server, const char *pidfile)
|
||||
{
|
||||
int pid_fd;
|
||||
|
||||
/* Make sure our syslog fd isn't overwritten */
|
||||
sanitize_fds();
|
||||
|
||||
/* do some other misc startup stuff while we are here to save bytes */
|
||||
pid_fd = pidfile_acquire(pidfile);
|
||||
pidfile_write_release(pid_fd);
|
||||
|
||||
/* equivelent of doing a fflush after every \n */
|
||||
setlinebuf(stdout);
|
||||
|
||||
udhcp_logging(LOG_INFO, "%s (v%s) started", client_server, VERSION);
|
||||
}
|
||||
#endif
|
||||
|
||||
|
|
@ -1,55 +0,0 @@
|
|||
/* common.h
|
||||
*
|
||||
* Russ Dill <Russ.Dill@asu.edu> September 2001
|
||||
* Rewritten by Vladimir Oleynik <dzo@simtreas.ru> (C) 2003
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#ifndef _COMMON_H
|
||||
#define _COMMON_H
|
||||
|
||||
#include "version.h"
|
||||
#include "libbb_udhcp.h"
|
||||
|
||||
|
||||
#ifndef UDHCP_SYSLOG
|
||||
enum syslog_levels {
|
||||
LOG_EMERG = 0,
|
||||
LOG_ALERT,
|
||||
LOG_CRIT,
|
||||
LOG_WARNING,
|
||||
LOG_ERR,
|
||||
LOG_INFO,
|
||||
LOG_DEBUG
|
||||
};
|
||||
#else
|
||||
#include <syslog.h>
|
||||
#endif
|
||||
|
||||
long uptime(void);
|
||||
void background(const char *pidfile);
|
||||
void start_log_and_pid(const char *client_server, const char *pidfile);
|
||||
void udhcp_logging(int level, const char *fmt, ...);
|
||||
|
||||
#define LOG(level, str, args...) udhcp_logging(level, str, ## args)
|
||||
|
||||
#ifdef UDHCP_DEBUG
|
||||
# define DEBUG(level, str, args...) LOG(level, str, ## args)
|
||||
#else
|
||||
# define DEBUG(level, str, args...) do {;} while(0)
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
|
@ -1,573 +0,0 @@
|
|||
/* dhcpc.c
|
||||
*
|
||||
* udhcp DHCP client
|
||||
*
|
||||
* Russ Dill <Russ.Dill@asu.edu> July 2001
|
||||
*
|
||||
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
||||
*/
|
||||
|
||||
#include <sys/time.h>
|
||||
#include <sys/file.h>
|
||||
#include <unistd.h>
|
||||
#include <getopt.h>
|
||||
#include <stdlib.h>
|
||||
#include <sys/socket.h>
|
||||
#include <netinet/in.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <signal.h>
|
||||
#include <time.h>
|
||||
#include <string.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <net/if.h>
|
||||
#include <errno.h>
|
||||
|
||||
#include "common.h"
|
||||
#include "dhcpd.h"
|
||||
#include "dhcpc.h"
|
||||
#include "options.h"
|
||||
#include "clientpacket.h"
|
||||
#include "clientsocket.h"
|
||||
#include "script.h"
|
||||
#include "socket.h"
|
||||
#include "signalpipe.h"
|
||||
|
||||
static int state;
|
||||
static unsigned long requested_ip; /* = 0 */
|
||||
static unsigned long server_addr;
|
||||
static unsigned long timeout;
|
||||
static int packet_num; /* = 0 */
|
||||
static int fd = -1;
|
||||
|
||||
#define LISTEN_NONE 0
|
||||
#define LISTEN_KERNEL 1
|
||||
#define LISTEN_RAW 2
|
||||
static int listen_mode;
|
||||
|
||||
struct client_config_t client_config = {
|
||||
/* Default options. */
|
||||
.abort_if_no_lease = 0,
|
||||
.foreground = 0,
|
||||
.quit_after_lease = 0,
|
||||
.background_if_no_lease = 0,
|
||||
.interface = "eth0",
|
||||
.pidfile = NULL,
|
||||
.script = DEFAULT_SCRIPT,
|
||||
.clientid = NULL,
|
||||
.vendorclass = NULL,
|
||||
.hostname = NULL,
|
||||
.fqdn = NULL,
|
||||
.ifindex = 0,
|
||||
.retries = 3,
|
||||
.timeout = 3,
|
||||
.arp = "\0\0\0\0\0\0", /* appease gcc-3.0 */
|
||||
};
|
||||
|
||||
#ifndef IN_BUSYBOX
|
||||
static void ATTRIBUTE_NORETURN show_usage(void)
|
||||
{
|
||||
printf(
|
||||
"Usage: udhcpc [OPTIONS]\n\n"
|
||||
" -c, --clientid=CLIENTID Set client identifier - type is first char\n"
|
||||
" -C, --clientid-none Suppress default client identifier\n"
|
||||
" -V, --vendorclass=CLASSID Set vendor class identifier\n"
|
||||
" -H, --hostname=HOSTNAME Client hostname\n"
|
||||
" -h Alias for -H\n"
|
||||
" -F, --fqdn=FQDN Client fully qualified domain name\n"
|
||||
" -f, --foreground Do not fork after getting lease\n"
|
||||
" -b, --background Fork to background if lease cannot be\n"
|
||||
" immediately negotiated.\n"
|
||||
" -i, --interface=INTERFACE Interface to use (default: eth0)\n"
|
||||
" -n, --now Exit with failure if lease cannot be\n"
|
||||
" immediately negotiated.\n"
|
||||
" -p, --pidfile=file Store process ID of daemon in file\n"
|
||||
" -q, --quit Quit after obtaining lease\n"
|
||||
" -r, --request=IP IP address to request (default: none)\n"
|
||||
" -s, --script=file Run file at dhcp events (default:\n"
|
||||
" " DEFAULT_SCRIPT ")\n"
|
||||
" -T, --timeout=seconds Try to get the lease for the amount of\n"
|
||||
" seconds (default: 3)\n"
|
||||
" -v, --version Display version\n"
|
||||
);
|
||||
exit(0);
|
||||
}
|
||||
#else
|
||||
#define show_usage bb_show_usage
|
||||
extern void show_usage(void) ATTRIBUTE_NORETURN;
|
||||
#endif
|
||||
|
||||
|
||||
/* just a little helper */
|
||||
static void change_mode(int new_mode)
|
||||
{
|
||||
DEBUG(LOG_INFO, "entering %s listen mode",
|
||||
new_mode ? (new_mode == 1 ? "kernel" : "raw") : "none");
|
||||
if (fd >= 0) close(fd);
|
||||
fd = -1;
|
||||
listen_mode = new_mode;
|
||||
}
|
||||
|
||||
|
||||
/* perform a renew */
|
||||
static void perform_renew(void)
|
||||
{
|
||||
LOG(LOG_INFO, "Performing a DHCP renew");
|
||||
switch (state) {
|
||||
case BOUND:
|
||||
change_mode(LISTEN_KERNEL);
|
||||
case RENEWING:
|
||||
case REBINDING:
|
||||
state = RENEW_REQUESTED;
|
||||
break;
|
||||
case RENEW_REQUESTED: /* impatient are we? fine, square 1 */
|
||||
run_script(NULL, "deconfig");
|
||||
case REQUESTING:
|
||||
case RELEASED:
|
||||
change_mode(LISTEN_RAW);
|
||||
state = INIT_SELECTING;
|
||||
break;
|
||||
case INIT_SELECTING:
|
||||
break;
|
||||
}
|
||||
|
||||
/* start things over */
|
||||
packet_num = 0;
|
||||
|
||||
/* Kill any timeouts because the user wants this to hurry along */
|
||||
timeout = 0;
|
||||
}
|
||||
|
||||
|
||||
/* perform a release */
|
||||
static void perform_release(void)
|
||||
{
|
||||
char buffer[16];
|
||||
struct in_addr temp_addr;
|
||||
|
||||
/* send release packet */
|
||||
if (state == BOUND || state == RENEWING || state == REBINDING) {
|
||||
temp_addr.s_addr = server_addr;
|
||||
sprintf(buffer, "%s", inet_ntoa(temp_addr));
|
||||
temp_addr.s_addr = requested_ip;
|
||||
LOG(LOG_INFO, "Unicasting a release of %s to %s",
|
||||
inet_ntoa(temp_addr), buffer);
|
||||
send_release(server_addr, requested_ip); /* unicast */
|
||||
run_script(NULL, "deconfig");
|
||||
}
|
||||
LOG(LOG_INFO, "Entering released state");
|
||||
|
||||
change_mode(LISTEN_NONE);
|
||||
state = RELEASED;
|
||||
timeout = 0x7fffffff;
|
||||
}
|
||||
|
||||
|
||||
static void client_background(void)
|
||||
{
|
||||
background(client_config.pidfile);
|
||||
client_config.foreground = 1; /* Do not fork again. */
|
||||
client_config.background_if_no_lease = 0;
|
||||
}
|
||||
|
||||
|
||||
#ifdef COMBINED_BINARY
|
||||
int udhcpc_main(int argc, char *argv[])
|
||||
#else
|
||||
int main(int argc, char *argv[])
|
||||
#endif
|
||||
{
|
||||
uint8_t *temp, *message;
|
||||
unsigned long t1 = 0, t2 = 0, xid = 0;
|
||||
unsigned long start = 0, lease;
|
||||
fd_set rfds;
|
||||
int retval;
|
||||
struct timeval tv;
|
||||
int c, len;
|
||||
struct dhcpMessage packet;
|
||||
struct in_addr temp_addr;
|
||||
long now;
|
||||
int max_fd;
|
||||
int sig;
|
||||
int no_clientid = 0;
|
||||
|
||||
static const struct option arg_options[] = {
|
||||
{"clientid", required_argument, 0, 'c'},
|
||||
{"clientid-none", no_argument, 0, 'C'},
|
||||
{"vendorclass", required_argument, 0, 'V'},
|
||||
{"foreground", no_argument, 0, 'f'},
|
||||
{"background", no_argument, 0, 'b'},
|
||||
{"hostname", required_argument, 0, 'H'},
|
||||
{"hostname", required_argument, 0, 'h'},
|
||||
{"fqdn", required_argument, 0, 'F'},
|
||||
{"interface", required_argument, 0, 'i'},
|
||||
{"now", no_argument, 0, 'n'},
|
||||
{"pidfile", required_argument, 0, 'p'},
|
||||
{"quit", no_argument, 0, 'q'},
|
||||
{"request", required_argument, 0, 'r'},
|
||||
{"script", required_argument, 0, 's'},
|
||||
{"timeout", required_argument, 0, 'T'},
|
||||
{"version", no_argument, 0, 'v'},
|
||||
{"retries", required_argument, 0, 't'},
|
||||
{0, 0, 0, 0}
|
||||
};
|
||||
|
||||
/* get options */
|
||||
while (1) {
|
||||
int option_index = 0;
|
||||
c = getopt_long(argc, argv, "c:CV:fbH:h:F:i:np:qr:s:T:t:v", arg_options, &option_index);
|
||||
if (c == -1) break;
|
||||
|
||||
switch (c) {
|
||||
case 'c':
|
||||
if (no_clientid) show_usage();
|
||||
len = strlen(optarg) > 255 ? 255 : strlen(optarg);
|
||||
free(client_config.clientid);
|
||||
client_config.clientid = xmalloc(len + 2);
|
||||
client_config.clientid[OPT_CODE] = DHCP_CLIENT_ID;
|
||||
client_config.clientid[OPT_LEN] = len;
|
||||
client_config.clientid[OPT_DATA] = '\0';
|
||||
strncpy((char*)client_config.clientid + OPT_DATA, optarg, len);
|
||||
break;
|
||||
case 'C':
|
||||
if (client_config.clientid) show_usage();
|
||||
no_clientid = 1;
|
||||
break;
|
||||
case 'V':
|
||||
len = strlen(optarg) > 255 ? 255 : strlen(optarg);
|
||||
free(client_config.vendorclass);
|
||||
client_config.vendorclass = xmalloc(len + 2);
|
||||
client_config.vendorclass[OPT_CODE] = DHCP_VENDOR;
|
||||
client_config.vendorclass[OPT_LEN] = len;
|
||||
strncpy((char*)client_config.vendorclass + OPT_DATA, optarg, len);
|
||||
break;
|
||||
case 'f':
|
||||
client_config.foreground = 1;
|
||||
break;
|
||||
case 'b':
|
||||
client_config.background_if_no_lease = 1;
|
||||
break;
|
||||
case 'h':
|
||||
case 'H':
|
||||
len = strlen(optarg) > 255 ? 255 : strlen(optarg);
|
||||
free(client_config.hostname);
|
||||
client_config.hostname = xmalloc(len + 2);
|
||||
client_config.hostname[OPT_CODE] = DHCP_HOST_NAME;
|
||||
client_config.hostname[OPT_LEN] = len;
|
||||
strncpy((char*)client_config.hostname + 2, optarg, len);
|
||||
break;
|
||||
case 'F':
|
||||
len = strlen(optarg) > 255 ? 255 : strlen(optarg);
|
||||
free(client_config.fqdn);
|
||||
client_config.fqdn = xmalloc(len + 5);
|
||||
client_config.fqdn[OPT_CODE] = DHCP_FQDN;
|
||||
client_config.fqdn[OPT_LEN] = len + 3;
|
||||
/* Flags: 0000NEOS
|
||||
S: 1 => Client requests Server to update A RR in DNS as well as PTR
|
||||
O: 1 => Server indicates to client that DNS has been updated regardless
|
||||
E: 1 => Name data is DNS format, i.e. <4>host<6>domain<4>com<0> not "host.domain.com"
|
||||
N: 1 => Client requests Server to not update DNS
|
||||
*/
|
||||
client_config.fqdn[OPT_LEN + 1] = 0x1;
|
||||
client_config.fqdn[OPT_LEN + 2] = 0;
|
||||
client_config.fqdn[OPT_LEN + 3] = 0;
|
||||
strncpy((char*)client_config.fqdn + 5, optarg, len);
|
||||
break;
|
||||
case 'i':
|
||||
client_config.interface = optarg;
|
||||
break;
|
||||
case 'n':
|
||||
client_config.abort_if_no_lease = 1;
|
||||
break;
|
||||
case 'p':
|
||||
client_config.pidfile = optarg;
|
||||
break;
|
||||
case 'q':
|
||||
client_config.quit_after_lease = 1;
|
||||
break;
|
||||
case 'r':
|
||||
requested_ip = inet_addr(optarg);
|
||||
break;
|
||||
case 's':
|
||||
client_config.script = optarg;
|
||||
break;
|
||||
case 'T':
|
||||
client_config.timeout = atoi(optarg);
|
||||
break;
|
||||
case 't':
|
||||
client_config.retries = atoi(optarg);
|
||||
break;
|
||||
case 'v':
|
||||
printf("udhcpcd, version %s\n\n", VERSION);
|
||||
return 0;
|
||||
break;
|
||||
default:
|
||||
show_usage();
|
||||
}
|
||||
}
|
||||
|
||||
/* Start the log, sanitize fd's, and write a pid file */
|
||||
start_log_and_pid("udhcpc", client_config.pidfile);
|
||||
|
||||
if (read_interface(client_config.interface, &client_config.ifindex,
|
||||
NULL, client_config.arp) < 0)
|
||||
return 1;
|
||||
|
||||
/* if not set, and not suppressed, setup the default client ID */
|
||||
if (!client_config.clientid && !no_clientid) {
|
||||
client_config.clientid = xmalloc(6 + 3);
|
||||
client_config.clientid[OPT_CODE] = DHCP_CLIENT_ID;
|
||||
client_config.clientid[OPT_LEN] = 7;
|
||||
client_config.clientid[OPT_DATA] = 1;
|
||||
memcpy(client_config.clientid + 3, client_config.arp, 6);
|
||||
}
|
||||
|
||||
if (!client_config.vendorclass) {
|
||||
client_config.vendorclass = xmalloc(sizeof("udhcp "VERSION) + 2);
|
||||
client_config.vendorclass[OPT_CODE] = DHCP_VENDOR;
|
||||
client_config.vendorclass[OPT_LEN] = sizeof("udhcp "VERSION) - 1;
|
||||
client_config.vendorclass[OPT_DATA] = 1;
|
||||
memcpy(&client_config.vendorclass[OPT_DATA],
|
||||
"udhcp "VERSION, sizeof("udhcp "VERSION) - 1);
|
||||
}
|
||||
|
||||
|
||||
/* setup the signal pipe */
|
||||
udhcp_sp_setup();
|
||||
|
||||
state = INIT_SELECTING;
|
||||
run_script(NULL, "deconfig");
|
||||
change_mode(LISTEN_RAW);
|
||||
|
||||
for (;;) {
|
||||
|
||||
tv.tv_sec = timeout - uptime();
|
||||
tv.tv_usec = 0;
|
||||
|
||||
if (listen_mode != LISTEN_NONE && fd < 0) {
|
||||
if (listen_mode == LISTEN_KERNEL)
|
||||
fd = listen_socket(INADDR_ANY, CLIENT_PORT, client_config.interface);
|
||||
else
|
||||
fd = raw_socket(client_config.ifindex);
|
||||
if (fd < 0) {
|
||||
LOG(LOG_ERR, "FATAL: couldn't listen on socket, %m");
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
max_fd = udhcp_sp_fd_set(&rfds, fd);
|
||||
|
||||
if (tv.tv_sec > 0) {
|
||||
DEBUG(LOG_INFO, "Waiting on select...");
|
||||
retval = select(max_fd + 1, &rfds, NULL, NULL, &tv);
|
||||
} else retval = 0; /* If we already timed out, fall through */
|
||||
|
||||
now = uptime();
|
||||
if (retval == 0) {
|
||||
/* timeout dropped to zero */
|
||||
switch (state) {
|
||||
case INIT_SELECTING:
|
||||
if (packet_num < client_config.retries) {
|
||||
if (packet_num == 0)
|
||||
xid = random_xid();
|
||||
|
||||
/* send discover packet */
|
||||
send_discover(xid, requested_ip); /* broadcast */
|
||||
|
||||
timeout = now + client_config.timeout;
|
||||
packet_num++;
|
||||
} else {
|
||||
run_script(NULL, "leasefail");
|
||||
if (client_config.background_if_no_lease) {
|
||||
LOG(LOG_INFO, "No lease, forking to background.");
|
||||
client_background();
|
||||
} else if (client_config.abort_if_no_lease) {
|
||||
LOG(LOG_INFO, "No lease, failing.");
|
||||
return 1;
|
||||
}
|
||||
/* wait to try again */
|
||||
packet_num = 0;
|
||||
timeout = now + 60;
|
||||
}
|
||||
break;
|
||||
case RENEW_REQUESTED:
|
||||
case REQUESTING:
|
||||
if (packet_num < client_config.retries) {
|
||||
/* send request packet */
|
||||
if (state == RENEW_REQUESTED)
|
||||
send_renew(xid, server_addr, requested_ip); /* unicast */
|
||||
else send_selecting(xid, server_addr, requested_ip); /* broadcast */
|
||||
|
||||
timeout = now + ((packet_num == 2) ? 10 : 2);
|
||||
packet_num++;
|
||||
} else {
|
||||
/* timed out, go back to init state */
|
||||
if (state == RENEW_REQUESTED) run_script(NULL, "deconfig");
|
||||
state = INIT_SELECTING;
|
||||
timeout = now;
|
||||
packet_num = 0;
|
||||
change_mode(LISTEN_RAW);
|
||||
}
|
||||
break;
|
||||
case BOUND:
|
||||
/* Lease is starting to run out, time to enter renewing state */
|
||||
state = RENEWING;
|
||||
change_mode(LISTEN_KERNEL);
|
||||
DEBUG(LOG_INFO, "Entering renew state");
|
||||
/* fall right through */
|
||||
case RENEWING:
|
||||
/* Either set a new T1, or enter REBINDING state */
|
||||
if ((t2 - t1) <= (lease / 14400 + 1)) {
|
||||
/* timed out, enter rebinding state */
|
||||
state = REBINDING;
|
||||
timeout = now + (t2 - t1);
|
||||
DEBUG(LOG_INFO, "Entering rebinding state");
|
||||
} else {
|
||||
/* send a request packet */
|
||||
send_renew(xid, server_addr, requested_ip); /* unicast */
|
||||
|
||||
t1 = (t2 - t1) / 2 + t1;
|
||||
timeout = t1 + start;
|
||||
}
|
||||
break;
|
||||
case REBINDING:
|
||||
/* Either set a new T2, or enter INIT state */
|
||||
if ((lease - t2) <= (lease / 14400 + 1)) {
|
||||
/* timed out, enter init state */
|
||||
state = INIT_SELECTING;
|
||||
LOG(LOG_INFO, "Lease lost, entering init state");
|
||||
run_script(NULL, "deconfig");
|
||||
timeout = now;
|
||||
packet_num = 0;
|
||||
change_mode(LISTEN_RAW);
|
||||
} else {
|
||||
/* send a request packet */
|
||||
send_renew(xid, 0, requested_ip); /* broadcast */
|
||||
|
||||
t2 = (lease - t2) / 2 + t2;
|
||||
timeout = t2 + start;
|
||||
}
|
||||
break;
|
||||
case RELEASED:
|
||||
/* yah, I know, *you* say it would never happen */
|
||||
timeout = 0x7fffffff;
|
||||
break;
|
||||
}
|
||||
} else if (retval > 0 && listen_mode != LISTEN_NONE && FD_ISSET(fd, &rfds)) {
|
||||
/* a packet is ready, read it */
|
||||
|
||||
if (listen_mode == LISTEN_KERNEL)
|
||||
len = get_packet(&packet, fd);
|
||||
else len = get_raw_packet(&packet, fd);
|
||||
|
||||
if (len == -1 && errno != EINTR) {
|
||||
DEBUG(LOG_INFO, "error on read, %m, reopening socket");
|
||||
change_mode(listen_mode); /* just close and reopen */
|
||||
}
|
||||
if (len < 0) continue;
|
||||
|
||||
if (packet.xid != xid) {
|
||||
DEBUG(LOG_INFO, "Ignoring XID %lx (our xid is %lx)",
|
||||
(unsigned long) packet.xid, xid);
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Ignore packets that aren't for us */
|
||||
if (memcmp(packet.chaddr, client_config.arp, 6)) {
|
||||
DEBUG(LOG_INFO, "packet does not have our chaddr -- ignoring");
|
||||
continue;
|
||||
}
|
||||
|
||||
if ((message = get_option(&packet, DHCP_MESSAGE_TYPE)) == NULL) {
|
||||
DEBUG(LOG_ERR, "couldnt get option from packet -- ignoring");
|
||||
continue;
|
||||
}
|
||||
|
||||
switch (state) {
|
||||
case INIT_SELECTING:
|
||||
/* Must be a DHCPOFFER to one of our xid's */
|
||||
if (*message == DHCPOFFER) {
|
||||
if ((temp = get_option(&packet, DHCP_SERVER_ID))) {
|
||||
memcpy(&server_addr, temp, 4);
|
||||
xid = packet.xid;
|
||||
requested_ip = packet.yiaddr;
|
||||
|
||||
/* enter requesting state */
|
||||
state = REQUESTING;
|
||||
timeout = now;
|
||||
packet_num = 0;
|
||||
} else {
|
||||
DEBUG(LOG_ERR, "No server ID in message");
|
||||
}
|
||||
}
|
||||
break;
|
||||
case RENEW_REQUESTED:
|
||||
case REQUESTING:
|
||||
case RENEWING:
|
||||
case REBINDING:
|
||||
if (*message == DHCPACK) {
|
||||
if (!(temp = get_option(&packet, DHCP_LEASE_TIME))) {
|
||||
LOG(LOG_ERR, "No lease time with ACK, using 1 hour lease");
|
||||
lease = 60 * 60;
|
||||
} else {
|
||||
memcpy(&lease, temp, 4);
|
||||
lease = ntohl(lease);
|
||||
}
|
||||
|
||||
/* enter bound state */
|
||||
t1 = lease / 2;
|
||||
|
||||
/* little fixed point for n * .875 */
|
||||
t2 = (lease * 0x7) >> 3;
|
||||
temp_addr.s_addr = packet.yiaddr;
|
||||
LOG(LOG_INFO, "Lease of %s obtained, lease time %ld",
|
||||
inet_ntoa(temp_addr), lease);
|
||||
start = now;
|
||||
timeout = t1 + start;
|
||||
requested_ip = packet.yiaddr;
|
||||
run_script(&packet,
|
||||
((state == RENEWING || state == REBINDING) ? "renew" : "bound"));
|
||||
|
||||
state = BOUND;
|
||||
change_mode(LISTEN_NONE);
|
||||
if (client_config.quit_after_lease)
|
||||
return 0;
|
||||
if (!client_config.foreground)
|
||||
client_background();
|
||||
|
||||
} else if (*message == DHCPNAK) {
|
||||
/* return to init state */
|
||||
LOG(LOG_INFO, "Received DHCP NAK");
|
||||
run_script(&packet, "nak");
|
||||
if (state != REQUESTING)
|
||||
run_script(NULL, "deconfig");
|
||||
state = INIT_SELECTING;
|
||||
timeout = now;
|
||||
requested_ip = 0;
|
||||
packet_num = 0;
|
||||
change_mode(LISTEN_RAW);
|
||||
sleep(3); /* avoid excessive network traffic */
|
||||
}
|
||||
break;
|
||||
/* case BOUND, RELEASED: - ignore all packets */
|
||||
}
|
||||
} else if (retval > 0 && (sig = udhcp_sp_read(&rfds))) {
|
||||
switch (sig) {
|
||||
case SIGUSR1:
|
||||
perform_renew();
|
||||
break;
|
||||
case SIGUSR2:
|
||||
perform_release();
|
||||
break;
|
||||
case SIGTERM:
|
||||
LOG(LOG_INFO, "Received SIGTERM");
|
||||
return 0;
|
||||
}
|
||||
} else if (retval == -1 && errno == EINTR) {
|
||||
/* a signal was caught */
|
||||
} else {
|
||||
/* An error occured */
|
||||
DEBUG(LOG_ERR, "Error on select");
|
||||
}
|
||||
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1,39 +0,0 @@
|
|||
/* dhcpc.h */
|
||||
#ifndef _DHCPC_H
|
||||
#define _DHCPC_H
|
||||
|
||||
/* grab define DEFAULT_SCRIPT */
|
||||
#include "libbb_udhcp.h"
|
||||
|
||||
#define INIT_SELECTING 0
|
||||
#define REQUESTING 1
|
||||
#define BOUND 2
|
||||
#define RENEWING 3
|
||||
#define REBINDING 4
|
||||
#define INIT_REBOOT 5
|
||||
#define RENEW_REQUESTED 6
|
||||
#define RELEASED 7
|
||||
|
||||
|
||||
struct client_config_t {
|
||||
char foreground; /* Do not fork */
|
||||
char quit_after_lease; /* Quit after obtaining lease */
|
||||
char abort_if_no_lease; /* Abort if no lease */
|
||||
char background_if_no_lease; /* Fork to background if no lease */
|
||||
char *interface; /* The name of the interface to use */
|
||||
char *pidfile; /* Optionally store the process ID */
|
||||
char *script; /* User script to run at dhcp events */
|
||||
uint8_t *clientid; /* Optional client id to use */
|
||||
uint8_t *vendorclass; /* Optional vendor class-id to use */
|
||||
uint8_t *hostname; /* Optional hostname to use */
|
||||
uint8_t *fqdn; /* Optional fully qualified domain name to use */
|
||||
int ifindex; /* Index number of the interface to use */
|
||||
int retries; /* Max number of request packets */
|
||||
int timeout; /* Number of seconds to try to get a lease */
|
||||
uint8_t arp[6]; /* Our arp address */
|
||||
};
|
||||
|
||||
extern struct client_config_t client_config;
|
||||
|
||||
|
||||
#endif
|
||||
|
|
@ -1,273 +0,0 @@
|
|||
/* dhcpd.c
|
||||
*
|
||||
* udhcp Server
|
||||
* Copyright (C) 1999 Matthew Ramsay <matthewr@moreton.com.au>
|
||||
* Chris Trew <ctrew@moreton.com.au>
|
||||
*
|
||||
* Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#include <fcntl.h>
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
#include <sys/wait.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <netdb.h>
|
||||
#include <netinet/in.h>
|
||||
#include <sys/socket.h>
|
||||
#include <unistd.h>
|
||||
#include <signal.h>
|
||||
#include <errno.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <time.h>
|
||||
#include <sys/time.h>
|
||||
|
||||
#include "dhcpd.h"
|
||||
#include "arpping.h"
|
||||
#include "socket.h"
|
||||
#include "options.h"
|
||||
#include "files.h"
|
||||
#include "serverpacket.h"
|
||||
#include "common.h"
|
||||
#include "signalpipe.h"
|
||||
#include "static_leases.h"
|
||||
|
||||
|
||||
/* globals */
|
||||
struct dhcpOfferedAddr *leases;
|
||||
struct server_config_t server_config;
|
||||
|
||||
|
||||
#ifdef COMBINED_BINARY
|
||||
int udhcpd_main(int argc, char *argv[])
|
||||
#else
|
||||
int main(int argc, char *argv[])
|
||||
#endif
|
||||
{
|
||||
fd_set rfds;
|
||||
struct timeval tv;
|
||||
int server_socket = -1;
|
||||
int bytes, retval;
|
||||
struct dhcpMessage packet;
|
||||
uint8_t *state;
|
||||
uint8_t *server_id, *requested;
|
||||
uint32_t server_id_align, requested_align;
|
||||
unsigned long timeout_end;
|
||||
struct option_set *option;
|
||||
struct dhcpOfferedAddr *lease;
|
||||
struct dhcpOfferedAddr static_lease;
|
||||
int max_sock;
|
||||
unsigned long num_ips;
|
||||
|
||||
uint32_t static_lease_ip;
|
||||
|
||||
memset(&server_config, 0, sizeof(struct server_config_t));
|
||||
read_config(argc < 2 ? DHCPD_CONF_FILE : argv[1]);
|
||||
|
||||
/* Start the log, sanitize fd's, and write a pid file */
|
||||
start_log_and_pid("udhcpd", server_config.pidfile);
|
||||
|
||||
if ((option = find_option(server_config.options, DHCP_LEASE_TIME))) {
|
||||
memcpy(&server_config.lease, option->data + 2, 4);
|
||||
server_config.lease = ntohl(server_config.lease);
|
||||
}
|
||||
else server_config.lease = LEASE_TIME;
|
||||
|
||||
/* Sanity check */
|
||||
num_ips = ntohl(server_config.end) - ntohl(server_config.start) + 1;
|
||||
if (server_config.max_leases > num_ips) {
|
||||
LOG(LOG_ERR, "max_leases value (%lu) not sane, "
|
||||
"setting to %lu instead",
|
||||
server_config.max_leases, num_ips);
|
||||
server_config.max_leases = num_ips;
|
||||
}
|
||||
|
||||
leases = xcalloc(server_config.max_leases, sizeof(struct dhcpOfferedAddr));
|
||||
read_leases(server_config.lease_file);
|
||||
|
||||
if (read_interface(server_config.interface, &server_config.ifindex,
|
||||
&server_config.server, server_config.arp) < 0)
|
||||
return 1;
|
||||
|
||||
#ifndef UDHCP_DEBUG
|
||||
background(server_config.pidfile); /* hold lock during fork. */
|
||||
#endif
|
||||
|
||||
/* Setup the signal pipe */
|
||||
udhcp_sp_setup();
|
||||
|
||||
timeout_end = time(0) + server_config.auto_time;
|
||||
while(1) { /* loop until universe collapses */
|
||||
|
||||
if (server_socket < 0)
|
||||
if ((server_socket = listen_socket(INADDR_ANY, SERVER_PORT, server_config.interface)) < 0) {
|
||||
LOG(LOG_ERR, "FATAL: couldn't create server socket, %m");
|
||||
return 2;
|
||||
}
|
||||
|
||||
max_sock = udhcp_sp_fd_set(&rfds, server_socket);
|
||||
if (server_config.auto_time) {
|
||||
tv.tv_sec = timeout_end - time(0);
|
||||
tv.tv_usec = 0;
|
||||
}
|
||||
if (!server_config.auto_time || tv.tv_sec > 0) {
|
||||
retval = select(max_sock + 1, &rfds, NULL, NULL,
|
||||
server_config.auto_time ? &tv : NULL);
|
||||
} else retval = 0; /* If we already timed out, fall through */
|
||||
|
||||
if (retval == 0) {
|
||||
write_leases();
|
||||
timeout_end = time(0) + server_config.auto_time;
|
||||
continue;
|
||||
} else if (retval < 0 && errno != EINTR) {
|
||||
DEBUG(LOG_INFO, "error on select");
|
||||
continue;
|
||||
}
|
||||
|
||||
switch (udhcp_sp_read(&rfds)) {
|
||||
case SIGUSR1:
|
||||
LOG(LOG_INFO, "Received a SIGUSR1");
|
||||
write_leases();
|
||||
/* why not just reset the timeout, eh */
|
||||
timeout_end = time(0) + server_config.auto_time;
|
||||
continue;
|
||||
case SIGTERM:
|
||||
LOG(LOG_INFO, "Received a SIGTERM");
|
||||
return 0;
|
||||
case 0: break; /* no signal */
|
||||
default: continue; /* signal or error (probably EINTR) */
|
||||
}
|
||||
|
||||
if ((bytes = get_packet(&packet, server_socket)) < 0) { /* this waits for a packet - idle */
|
||||
if (bytes == -1 && errno != EINTR) {
|
||||
DEBUG(LOG_INFO, "error on read, %m, reopening socket");
|
||||
close(server_socket);
|
||||
server_socket = -1;
|
||||
}
|
||||
continue;
|
||||
}
|
||||
|
||||
if ((state = get_option(&packet, DHCP_MESSAGE_TYPE)) == NULL) {
|
||||
DEBUG(LOG_ERR, "couldn't get option from packet, ignoring");
|
||||
continue;
|
||||
}
|
||||
|
||||
/* Look for a static lease */
|
||||
static_lease_ip = getIpByMac(server_config.static_leases, &packet.chaddr);
|
||||
|
||||
if(static_lease_ip)
|
||||
{
|
||||
printf("Found static lease: %x\n", static_lease_ip);
|
||||
|
||||
memcpy(&static_lease.chaddr, &packet.chaddr, 16);
|
||||
static_lease.yiaddr = static_lease_ip;
|
||||
static_lease.expires = 0;
|
||||
|
||||
lease = &static_lease;
|
||||
|
||||
}
|
||||
else
|
||||
{
|
||||
lease = find_lease_by_chaddr(packet.chaddr);
|
||||
}
|
||||
|
||||
switch (state[0]) {
|
||||
case DHCPDISCOVER:
|
||||
DEBUG(LOG_INFO,"received DISCOVER");
|
||||
|
||||
if (sendOffer(&packet) < 0) {
|
||||
LOG(LOG_ERR, "send OFFER failed");
|
||||
}
|
||||
break;
|
||||
case DHCPREQUEST:
|
||||
DEBUG(LOG_INFO, "received REQUEST");
|
||||
|
||||
requested = get_option(&packet, DHCP_REQUESTED_IP);
|
||||
server_id = get_option(&packet, DHCP_SERVER_ID);
|
||||
|
||||
if (requested) memcpy(&requested_align, requested, 4);
|
||||
if (server_id) memcpy(&server_id_align, server_id, 4);
|
||||
|
||||
if (lease) {
|
||||
if (server_id) {
|
||||
/* SELECTING State */
|
||||
DEBUG(LOG_INFO, "server_id = %08x", ntohl(server_id_align));
|
||||
if (server_id_align == server_config.server && requested &&
|
||||
requested_align == lease->yiaddr) {
|
||||
sendACK(&packet, lease->yiaddr);
|
||||
}
|
||||
} else {
|
||||
if (requested) {
|
||||
/* INIT-REBOOT State */
|
||||
if (lease->yiaddr == requested_align)
|
||||
sendACK(&packet, lease->yiaddr);
|
||||
else sendNAK(&packet);
|
||||
} else {
|
||||
/* RENEWING or REBINDING State */
|
||||
if (lease->yiaddr == packet.ciaddr)
|
||||
sendACK(&packet, lease->yiaddr);
|
||||
else {
|
||||
/* don't know what to do!!!! */
|
||||
sendNAK(&packet);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* what to do if we have no record of the client */
|
||||
} else if (server_id) {
|
||||
/* SELECTING State */
|
||||
|
||||
} else if (requested) {
|
||||
/* INIT-REBOOT State */
|
||||
if ((lease = find_lease_by_yiaddr(requested_align))) {
|
||||
if (lease_expired(lease)) {
|
||||
/* probably best if we drop this lease */
|
||||
memset(lease->chaddr, 0, 16);
|
||||
/* make some contention for this address */
|
||||
} else sendNAK(&packet);
|
||||
} else if (requested_align < server_config.start ||
|
||||
requested_align > server_config.end) {
|
||||
sendNAK(&packet);
|
||||
} /* else remain silent */
|
||||
|
||||
} else {
|
||||
/* RENEWING or REBINDING State */
|
||||
}
|
||||
break;
|
||||
case DHCPDECLINE:
|
||||
DEBUG(LOG_INFO,"received DECLINE");
|
||||
if (lease) {
|
||||
memset(lease->chaddr, 0, 16);
|
||||
lease->expires = time(0) + server_config.decline_time;
|
||||
}
|
||||
break;
|
||||
case DHCPRELEASE:
|
||||
DEBUG(LOG_INFO,"received RELEASE");
|
||||
if (lease) lease->expires = time(0);
|
||||
break;
|
||||
case DHCPINFORM:
|
||||
DEBUG(LOG_INFO,"received INFORM");
|
||||
send_inform(&packet);
|
||||
break;
|
||||
default:
|
||||
LOG(LOG_WARNING, "unsupported DHCP message (%02x) -- ignoring", state[0]);
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -1,141 +0,0 @@
|
|||
/* dhcpd.h */
|
||||
#ifndef _DHCPD_H
|
||||
#define _DHCPD_H
|
||||
|
||||
#include <netinet/ip.h>
|
||||
#include <netinet/udp.h>
|
||||
|
||||
#include "libbb_udhcp.h"
|
||||
#include "leases.h"
|
||||
#include "version.h"
|
||||
|
||||
/************************************/
|
||||
/* Defaults _you_ may want to tweak */
|
||||
/************************************/
|
||||
|
||||
/* the period of time the client is allowed to use that address */
|
||||
#define LEASE_TIME (60*60*24*10) /* 10 days of seconds */
|
||||
#define LEASES_FILE "/var/lib/misc/udhcpd.leases"
|
||||
|
||||
/* where to find the DHCP server configuration file */
|
||||
#define DHCPD_CONF_FILE "/etc/udhcpd.conf"
|
||||
|
||||
/*****************************************************************/
|
||||
/* Do not modify below here unless you know what you are doing!! */
|
||||
/*****************************************************************/
|
||||
|
||||
/* DHCP protocol -- see RFC 2131 */
|
||||
#define SERVER_PORT 67
|
||||
#define CLIENT_PORT 68
|
||||
|
||||
#define DHCP_MAGIC 0x63825363
|
||||
|
||||
/* DHCP option codes (partial list) */
|
||||
#define DHCP_PADDING 0x00
|
||||
#define DHCP_SUBNET 0x01
|
||||
#define DHCP_TIME_OFFSET 0x02
|
||||
#define DHCP_ROUTER 0x03
|
||||
#define DHCP_TIME_SERVER 0x04
|
||||
#define DHCP_NAME_SERVER 0x05
|
||||
#define DHCP_DNS_SERVER 0x06
|
||||
#define DHCP_LOG_SERVER 0x07
|
||||
#define DHCP_COOKIE_SERVER 0x08
|
||||
#define DHCP_LPR_SERVER 0x09
|
||||
#define DHCP_HOST_NAME 0x0c
|
||||
#define DHCP_BOOT_SIZE 0x0d
|
||||
#define DHCP_DOMAIN_NAME 0x0f
|
||||
#define DHCP_SWAP_SERVER 0x10
|
||||
#define DHCP_ROOT_PATH 0x11
|
||||
#define DHCP_IP_TTL 0x17
|
||||
#define DHCP_MTU 0x1a
|
||||
#define DHCP_BROADCAST 0x1c
|
||||
#define DHCP_NTP_SERVER 0x2a
|
||||
#define DHCP_WINS_SERVER 0x2c
|
||||
#define DHCP_REQUESTED_IP 0x32
|
||||
#define DHCP_LEASE_TIME 0x33
|
||||
#define DHCP_OPTION_OVER 0x34
|
||||
#define DHCP_MESSAGE_TYPE 0x35
|
||||
#define DHCP_SERVER_ID 0x36
|
||||
#define DHCP_PARAM_REQ 0x37
|
||||
#define DHCP_MESSAGE 0x38
|
||||
#define DHCP_MAX_SIZE 0x39
|
||||
#define DHCP_T1 0x3a
|
||||
#define DHCP_T2 0x3b
|
||||
#define DHCP_VENDOR 0x3c
|
||||
#define DHCP_CLIENT_ID 0x3d
|
||||
#define DHCP_FQDN 0x51
|
||||
|
||||
#define DHCP_END 0xFF
|
||||
|
||||
|
||||
#define BOOTREQUEST 1
|
||||
#define BOOTREPLY 2
|
||||
|
||||
#define ETH_10MB 1
|
||||
#define ETH_10MB_LEN 6
|
||||
|
||||
#define DHCPDISCOVER 1
|
||||
#define DHCPOFFER 2
|
||||
#define DHCPREQUEST 3
|
||||
#define DHCPDECLINE 4
|
||||
#define DHCPACK 5
|
||||
#define DHCPNAK 6
|
||||
#define DHCPRELEASE 7
|
||||
#define DHCPINFORM 8
|
||||
|
||||
#define BROADCAST_FLAG 0x8000
|
||||
|
||||
#define OPTION_FIELD 0
|
||||
#define FILE_FIELD 1
|
||||
#define SNAME_FIELD 2
|
||||
|
||||
/* miscellaneous defines */
|
||||
#define MAC_BCAST_ADDR (uint8_t *) "\xff\xff\xff\xff\xff\xff"
|
||||
#define OPT_CODE 0
|
||||
#define OPT_LEN 1
|
||||
#define OPT_DATA 2
|
||||
|
||||
struct option_set {
|
||||
uint8_t *data;
|
||||
struct option_set *next;
|
||||
};
|
||||
|
||||
struct static_lease {
|
||||
uint8_t *mac;
|
||||
uint32_t *ip;
|
||||
struct static_lease *next;
|
||||
};
|
||||
|
||||
struct server_config_t {
|
||||
uint32_t server; /* Our IP, in network order */
|
||||
uint32_t start; /* Start address of leases, network order */
|
||||
uint32_t end; /* End of leases, network order */
|
||||
struct option_set *options; /* List of DHCP options loaded from the config file */
|
||||
char *interface; /* The name of the interface to use */
|
||||
int ifindex; /* Index number of the interface to use */
|
||||
uint8_t arp[6]; /* Our arp address */
|
||||
unsigned long lease; /* lease time in seconds (host order) */
|
||||
unsigned long max_leases; /* maximum number of leases (including reserved address) */
|
||||
char remaining; /* should the lease file be interpreted as lease time remaining, or
|
||||
* as the time the lease expires */
|
||||
unsigned long auto_time; /* how long should udhcpd wait before writing a config file.
|
||||
* if this is zero, it will only write one on SIGUSR1 */
|
||||
unsigned long decline_time; /* how long an address is reserved if a client returns a
|
||||
* decline message */
|
||||
unsigned long conflict_time; /* how long an arp conflict offender is leased for */
|
||||
unsigned long offer_time; /* how long an offered address is reserved */
|
||||
unsigned long min_lease; /* minimum lease a client can request*/
|
||||
char *lease_file;
|
||||
char *pidfile;
|
||||
char *notify_file; /* What to run whenever leases are written */
|
||||
uint32_t siaddr; /* next server bootp option */
|
||||
char *sname; /* bootp server name */
|
||||
char *boot_file; /* bootp boot file option */
|
||||
struct static_lease *static_leases; /* List of ip/mac pairs to assign static leases */
|
||||
};
|
||||
|
||||
extern struct server_config_t server_config;
|
||||
extern struct dhcpOfferedAddr *leases;
|
||||
|
||||
|
||||
#endif
|
||||
|
|
@ -1,114 +0,0 @@
|
|||
/* vi: set sw=4 ts=4: */
|
||||
/*
|
||||
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
||||
*/
|
||||
#include <fcntl.h>
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <sys/wait.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <netdb.h>
|
||||
#include <netinet/in.h>
|
||||
#include <stdio.h>
|
||||
#include <sys/socket.h>
|
||||
#include <unistd.h>
|
||||
#include <getopt.h>
|
||||
#include <time.h>
|
||||
|
||||
#include "dhcpd.h"
|
||||
#include "leases.h"
|
||||
#include "libbb_udhcp.h"
|
||||
|
||||
#define REMAINING 0
|
||||
#define ABSOLUTE 1
|
||||
|
||||
|
||||
#ifndef IN_BUSYBOX
|
||||
static void ATTRIBUTE_NORETURN show_usage(void)
|
||||
{
|
||||
printf(
|
||||
"Usage: dumpleases -f <file> -[r|a]\n\n"
|
||||
" -f, --file=FILENAME Leases file to load\n"
|
||||
" -r, --remaining Interepret lease times as time remaing\n"
|
||||
" -a, --absolute Interepret lease times as expire time\n");
|
||||
exit(0);
|
||||
}
|
||||
#else
|
||||
#define show_usage bb_show_usage
|
||||
#endif
|
||||
|
||||
|
||||
#ifdef IN_BUSYBOX
|
||||
int dumpleases_main(int argc, char *argv[])
|
||||
#else
|
||||
int main(int argc, char *argv[])
|
||||
#endif
|
||||
{
|
||||
FILE *fp;
|
||||
int i, c, mode = REMAINING;
|
||||
long expires;
|
||||
const char *file = LEASES_FILE;
|
||||
struct dhcpOfferedAddr lease;
|
||||
struct in_addr addr;
|
||||
|
||||
static const struct option options[] = {
|
||||
{"absolute", 0, 0, 'a'},
|
||||
{"remaining", 0, 0, 'r'},
|
||||
{"file", 1, 0, 'f'},
|
||||
{0, 0, 0, 0}
|
||||
};
|
||||
|
||||
while (1) {
|
||||
int option_index = 0;
|
||||
c = getopt_long(argc, argv, "arf:", options, &option_index);
|
||||
if (c == -1) break;
|
||||
|
||||
switch (c) {
|
||||
case 'a': mode = ABSOLUTE; break;
|
||||
case 'r': mode = REMAINING; break;
|
||||
case 'f':
|
||||
file = optarg;
|
||||
break;
|
||||
default:
|
||||
show_usage();
|
||||
}
|
||||
}
|
||||
|
||||
fp = xfopen(file, "r");
|
||||
|
||||
printf("Mac Address IP-Address Expires %s\n", mode == REMAINING ? "in" : "at");
|
||||
/* "00:00:00:00:00:00 255.255.255.255 Wed Jun 30 21:49:08 1993" */
|
||||
while (fread(&lease, sizeof(lease), 1, fp)) {
|
||||
|
||||
for (i = 0; i < 6; i++) {
|
||||
printf("%02x", lease.chaddr[i]);
|
||||
if (i != 5) printf(":");
|
||||
}
|
||||
addr.s_addr = lease.yiaddr;
|
||||
printf(" %-15s", inet_ntoa(addr));
|
||||
expires = ntohl(lease.expires);
|
||||
printf(" ");
|
||||
if (mode == REMAINING) {
|
||||
if (!expires) printf("expired\n");
|
||||
else {
|
||||
if (expires > 60*60*24) {
|
||||
printf("%ld days, ", expires / (60*60*24));
|
||||
expires %= 60*60*24;
|
||||
}
|
||||
if (expires > 60*60) {
|
||||
printf("%ld hours, ", expires / (60*60));
|
||||
expires %= 60*60;
|
||||
}
|
||||
if (expires > 60) {
|
||||
printf("%ld minutes, ", expires / 60);
|
||||
expires %= 60;
|
||||
}
|
||||
printf("%ld seconds\n", expires);
|
||||
}
|
||||
} else printf("%s", ctime(&expires));
|
||||
}
|
||||
fclose(fp);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1,393 +0,0 @@
|
|||
/*
|
||||
* files.c -- DHCP server file manipulation *
|
||||
* Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001
|
||||
*/
|
||||
|
||||
#include <sys/socket.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
#include <time.h>
|
||||
#include <ctype.h>
|
||||
#include <netdb.h>
|
||||
|
||||
#include <netinet/ether.h>
|
||||
#include "static_leases.h"
|
||||
|
||||
#include "dhcpd.h"
|
||||
#include "options.h"
|
||||
#include "files.h"
|
||||
#include "common.h"
|
||||
|
||||
/*
|
||||
* Domain names may have 254 chars, and string options can be 254
|
||||
* chars long. However, 80 bytes will be enough for most, and won't
|
||||
* hog up memory. If you have a special application, change it
|
||||
*/
|
||||
#define READ_CONFIG_BUF_SIZE 80
|
||||
|
||||
/* on these functions, make sure you datatype matches */
|
||||
static int read_ip(const char *line, void *arg)
|
||||
{
|
||||
struct in_addr *addr = arg;
|
||||
struct hostent *host;
|
||||
int retval = 1;
|
||||
|
||||
if (!inet_aton(line, addr)) {
|
||||
if ((host = gethostbyname(line)))
|
||||
addr->s_addr = *((unsigned long *) host->h_addr_list[0]);
|
||||
else retval = 0;
|
||||
}
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int read_mac(const char *line, void *arg)
|
||||
{
|
||||
uint8_t *mac_bytes = arg;
|
||||
struct ether_addr *temp_ether_addr;
|
||||
int retval = 1;
|
||||
|
||||
temp_ether_addr = ether_aton(line);
|
||||
|
||||
if(temp_ether_addr == NULL)
|
||||
retval = 0;
|
||||
else
|
||||
memcpy(mac_bytes, temp_ether_addr, 6);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
|
||||
static int read_str(const char *line, void *arg)
|
||||
{
|
||||
char **dest = arg;
|
||||
|
||||
free(*dest);
|
||||
*dest = strdup(line);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int read_u32(const char *line, void *arg)
|
||||
{
|
||||
uint32_t *dest = arg;
|
||||
char *endptr;
|
||||
*dest = strtoul(line, &endptr, 0);
|
||||
return endptr[0] == '\0';
|
||||
}
|
||||
|
||||
|
||||
static int read_yn(const char *line, void *arg)
|
||||
{
|
||||
char *dest = arg;
|
||||
int retval = 1;
|
||||
|
||||
if (!strcasecmp("yes", line))
|
||||
*dest = 1;
|
||||
else if (!strcasecmp("no", line))
|
||||
*dest = 0;
|
||||
else retval = 0;
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
|
||||
/* find option 'code' in opt_list */
|
||||
struct option_set *find_option(struct option_set *opt_list, char code)
|
||||
{
|
||||
while (opt_list && opt_list->data[OPT_CODE] < code)
|
||||
opt_list = opt_list->next;
|
||||
|
||||
if (opt_list && opt_list->data[OPT_CODE] == code) return opt_list;
|
||||
else return NULL;
|
||||
}
|
||||
|
||||
|
||||
/* add an option to the opt_list */
|
||||
static void attach_option(struct option_set **opt_list, struct dhcp_option *option, char *buffer, int length)
|
||||
{
|
||||
struct option_set *existing, *new, **curr;
|
||||
|
||||
/* add it to an existing option */
|
||||
if ((existing = find_option(*opt_list, option->code))) {
|
||||
DEBUG(LOG_INFO, "Attaching option %s to existing member of list", option->name);
|
||||
if (option->flags & OPTION_LIST) {
|
||||
if (existing->data[OPT_LEN] + length <= 255) {
|
||||
existing->data = realloc(existing->data,
|
||||
existing->data[OPT_LEN] + length + 2);
|
||||
memcpy(existing->data + existing->data[OPT_LEN] + 2, buffer, length);
|
||||
existing->data[OPT_LEN] += length;
|
||||
} /* else, ignore the data, we could put this in a second option in the future */
|
||||
} /* else, ignore the new data */
|
||||
} else {
|
||||
DEBUG(LOG_INFO, "Attaching option %s to list", option->name);
|
||||
|
||||
/* make a new option */
|
||||
new = xmalloc(sizeof(struct option_set));
|
||||
new->data = xmalloc(length + 2);
|
||||
new->data[OPT_CODE] = option->code;
|
||||
new->data[OPT_LEN] = length;
|
||||
memcpy(new->data + 2, buffer, length);
|
||||
|
||||
curr = opt_list;
|
||||
while (*curr && (*curr)->data[OPT_CODE] < option->code)
|
||||
curr = &(*curr)->next;
|
||||
|
||||
new->next = *curr;
|
||||
*curr = new;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* read a dhcp option and add it to opt_list */
|
||||
static int read_opt(const char *const_line, void *arg)
|
||||
{
|
||||
struct option_set **opt_list = arg;
|
||||
char *opt, *val, *endptr;
|
||||
struct dhcp_option *option;
|
||||
int retval = 0, length;
|
||||
char buffer[8];
|
||||
char *line;
|
||||
uint16_t *result_u16 = (uint16_t *) buffer;
|
||||
uint32_t *result_u32 = (uint32_t *) buffer;
|
||||
|
||||
/* Cheat, the only const line we'll actually get is "" */
|
||||
line = (char *) const_line;
|
||||
if (!(opt = strtok(line, " \t="))) return 0;
|
||||
|
||||
for (option = dhcp_options; option->code; option++)
|
||||
if (!strcasecmp(option->name, opt))
|
||||
break;
|
||||
|
||||
if (!option->code) return 0;
|
||||
|
||||
do {
|
||||
if (!(val = strtok(NULL, ", \t"))) break;
|
||||
length = option_lengths[option->flags & TYPE_MASK];
|
||||
retval = 0;
|
||||
opt = buffer; /* new meaning for variable opt */
|
||||
switch (option->flags & TYPE_MASK) {
|
||||
case OPTION_IP:
|
||||
retval = read_ip(val, buffer);
|
||||
break;
|
||||
case OPTION_IP_PAIR:
|
||||
retval = read_ip(val, buffer);
|
||||
if (!(val = strtok(NULL, ", \t/-"))) retval = 0;
|
||||
if (retval) retval = read_ip(val, buffer + 4);
|
||||
break;
|
||||
case OPTION_STRING:
|
||||
length = strlen(val);
|
||||
if (length > 0) {
|
||||
if (length > 254) length = 254;
|
||||
opt = val;
|
||||
retval = 1;
|
||||
}
|
||||
break;
|
||||
case OPTION_BOOLEAN:
|
||||
retval = read_yn(val, buffer);
|
||||
break;
|
||||
case OPTION_U8:
|
||||
buffer[0] = strtoul(val, &endptr, 0);
|
||||
retval = (endptr[0] == '\0');
|
||||
break;
|
||||
case OPTION_U16:
|
||||
*result_u16 = htons(strtoul(val, &endptr, 0));
|
||||
retval = (endptr[0] == '\0');
|
||||
break;
|
||||
case OPTION_S16:
|
||||
*result_u16 = htons(strtol(val, &endptr, 0));
|
||||
retval = (endptr[0] == '\0');
|
||||
break;
|
||||
case OPTION_U32:
|
||||
*result_u32 = htonl(strtoul(val, &endptr, 0));
|
||||
retval = (endptr[0] == '\0');
|
||||
break;
|
||||
case OPTION_S32:
|
||||
*result_u32 = htonl(strtol(val, &endptr, 0));
|
||||
retval = (endptr[0] == '\0');
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
if (retval)
|
||||
attach_option(opt_list, option, opt, length);
|
||||
} while (retval && option->flags & OPTION_LIST);
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int read_staticlease(const char *const_line, void *arg)
|
||||
{
|
||||
|
||||
char *line;
|
||||
char *mac_string;
|
||||
char *ip_string;
|
||||
uint8_t *mac_bytes;
|
||||
uint32_t *ip;
|
||||
|
||||
|
||||
/* Allocate memory for addresses */
|
||||
mac_bytes = xmalloc(sizeof(unsigned char) * 8);
|
||||
ip = xmalloc(sizeof(uint32_t));
|
||||
|
||||
/* Read mac */
|
||||
line = (char *) const_line;
|
||||
mac_string = strtok(line, " \t");
|
||||
read_mac(mac_string, mac_bytes);
|
||||
|
||||
/* Read ip */
|
||||
ip_string = strtok(NULL, " \t");
|
||||
read_ip(ip_string, ip);
|
||||
|
||||
addStaticLease(arg, mac_bytes, ip);
|
||||
|
||||
#ifdef UDHCP_DEBUG
|
||||
printStaticLeases(arg);
|
||||
#endif
|
||||
|
||||
return 1;
|
||||
|
||||
}
|
||||
|
||||
|
||||
static const struct config_keyword keywords[] = {
|
||||
/* keyword handler variable address default */
|
||||
{"start", read_ip, &(server_config.start), "192.168.0.20"},
|
||||
{"end", read_ip, &(server_config.end), "192.168.0.254"},
|
||||
{"interface", read_str, &(server_config.interface), "eth0"},
|
||||
{"option", read_opt, &(server_config.options), ""},
|
||||
{"opt", read_opt, &(server_config.options), ""},
|
||||
{"max_leases", read_u32, &(server_config.max_leases), "254"},
|
||||
{"remaining", read_yn, &(server_config.remaining), "yes"},
|
||||
{"auto_time", read_u32, &(server_config.auto_time), "7200"},
|
||||
{"decline_time",read_u32, &(server_config.decline_time),"3600"},
|
||||
{"conflict_time",read_u32,&(server_config.conflict_time),"3600"},
|
||||
{"offer_time", read_u32, &(server_config.offer_time), "60"},
|
||||
{"min_lease", read_u32, &(server_config.min_lease), "60"},
|
||||
{"lease_file", read_str, &(server_config.lease_file), LEASES_FILE},
|
||||
{"pidfile", read_str, &(server_config.pidfile), "/var/run/udhcpd.pid"},
|
||||
{"notify_file", read_str, &(server_config.notify_file), ""},
|
||||
{"siaddr", read_ip, &(server_config.siaddr), "0.0.0.0"},
|
||||
{"sname", read_str, &(server_config.sname), ""},
|
||||
{"boot_file", read_str, &(server_config.boot_file), ""},
|
||||
{"static_lease",read_staticlease, &(server_config.static_leases), ""},
|
||||
/*ADDME: static lease */
|
||||
{"", NULL, NULL, ""}
|
||||
};
|
||||
|
||||
|
||||
int read_config(const char *file)
|
||||
{
|
||||
FILE *in;
|
||||
char buffer[READ_CONFIG_BUF_SIZE], *token, *line;
|
||||
#ifdef UDHCP_DEBUG
|
||||
char orig[READ_CONFIG_BUF_SIZE];
|
||||
#endif
|
||||
int i, lm = 0;
|
||||
|
||||
for (i = 0; keywords[i].keyword[0]; i++)
|
||||
if (keywords[i].def[0])
|
||||
keywords[i].handler(keywords[i].def, keywords[i].var);
|
||||
|
||||
if (!(in = fopen(file, "r"))) {
|
||||
LOG(LOG_ERR, "unable to open config file: %s", file);
|
||||
return 0;
|
||||
}
|
||||
|
||||
while (fgets(buffer, READ_CONFIG_BUF_SIZE, in)) {
|
||||
lm++;
|
||||
if (strchr(buffer, '\n')) *(strchr(buffer, '\n')) = '\0';
|
||||
#ifdef UDHCP_DEBUG
|
||||
strcpy(orig, buffer);
|
||||
#endif
|
||||
if (strchr(buffer, '#')) *(strchr(buffer, '#')) = '\0';
|
||||
|
||||
if (!(token = strtok(buffer, " \t"))) continue;
|
||||
if (!(line = strtok(NULL, ""))) continue;
|
||||
|
||||
/* eat leading whitespace */
|
||||
line = line + strspn(line, " \t=");
|
||||
/* eat trailing whitespace */
|
||||
for (i = strlen(line); i > 0 && isspace(line[i - 1]); i--);
|
||||
line[i] = '\0';
|
||||
|
||||
for (i = 0; keywords[i].keyword[0]; i++)
|
||||
if (!strcasecmp(token, keywords[i].keyword))
|
||||
if (!keywords[i].handler(line, keywords[i].var)) {
|
||||
LOG(LOG_ERR, "Failure parsing line %d of %s", lm, file);
|
||||
DEBUG(LOG_ERR, "unable to parse '%s'", orig);
|
||||
/* reset back to the default value */
|
||||
keywords[i].handler(keywords[i].def, keywords[i].var);
|
||||
}
|
||||
}
|
||||
fclose(in);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
void write_leases(void)
|
||||
{
|
||||
FILE *fp;
|
||||
unsigned int i;
|
||||
char buf[255];
|
||||
time_t curr = time(0);
|
||||
unsigned long tmp_time;
|
||||
|
||||
if (!(fp = fopen(server_config.lease_file, "w"))) {
|
||||
LOG(LOG_ERR, "Unable to open %s for writing", server_config.lease_file);
|
||||
return;
|
||||
}
|
||||
|
||||
for (i = 0; i < server_config.max_leases; i++) {
|
||||
if (leases[i].yiaddr != 0) {
|
||||
|
||||
/* screw with the time in the struct, for easier writing */
|
||||
tmp_time = leases[i].expires;
|
||||
|
||||
if (server_config.remaining) {
|
||||
if (lease_expired(&(leases[i])))
|
||||
leases[i].expires = 0;
|
||||
else leases[i].expires -= curr;
|
||||
} /* else stick with the time we got */
|
||||
leases[i].expires = htonl(leases[i].expires);
|
||||
fwrite(&leases[i], sizeof(struct dhcpOfferedAddr), 1, fp);
|
||||
|
||||
/* Then restore it when done. */
|
||||
leases[i].expires = tmp_time;
|
||||
}
|
||||
}
|
||||
fclose(fp);
|
||||
|
||||
if (server_config.notify_file) {
|
||||
sprintf(buf, "%s %s", server_config.notify_file, server_config.lease_file);
|
||||
system(buf);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void read_leases(const char *file)
|
||||
{
|
||||
FILE *fp;
|
||||
unsigned int i = 0;
|
||||
struct dhcpOfferedAddr lease;
|
||||
|
||||
if (!(fp = fopen(file, "r"))) {
|
||||
LOG(LOG_ERR, "Unable to open %s for reading", file);
|
||||
return;
|
||||
}
|
||||
|
||||
while (i < server_config.max_leases && (fread(&lease, sizeof lease, 1, fp) == 1)) {
|
||||
/* ADDME: is it a static lease */
|
||||
if (lease.yiaddr >= server_config.start && lease.yiaddr <= server_config.end) {
|
||||
lease.expires = ntohl(lease.expires);
|
||||
if (!server_config.remaining) lease.expires -= time(0);
|
||||
if (!(add_lease(lease.chaddr, lease.yiaddr, lease.expires))) {
|
||||
LOG(LOG_WARNING, "Too many leases while loading %s\n", file);
|
||||
break;
|
||||
}
|
||||
i++;
|
||||
}
|
||||
}
|
||||
DEBUG(LOG_INFO, "Read %d leases", i);
|
||||
fclose(fp);
|
||||
}
|
||||
|
|
@ -1,19 +0,0 @@
|
|||
/* files.h */
|
||||
#ifndef _FILES_H
|
||||
#define _FILES_H
|
||||
|
||||
struct config_keyword {
|
||||
const char *keyword;
|
||||
int (* const handler)(const char *line, void *var);
|
||||
void *var;
|
||||
const char *def;
|
||||
};
|
||||
|
||||
|
||||
int read_config(const char *file);
|
||||
void write_leases(void);
|
||||
void read_leases(const char *file);
|
||||
|
||||
struct option_set *find_option(struct option_set *opt_list, char code);
|
||||
|
||||
#endif
|
||||
|
|
@ -1,16 +0,0 @@
|
|||
#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;
|
||||
}
|
||||
|
|
@ -1,158 +0,0 @@
|
|||
/*
|
||||
* leases.c -- tools to manage DHCP leases
|
||||
* Russ Dill <Russ.Dill@asu.edu> July 2001
|
||||
*/
|
||||
|
||||
#include <time.h>
|
||||
#include <string.h>
|
||||
#include <sys/socket.h>
|
||||
#include <netinet/in.h>
|
||||
#include <arpa/inet.h>
|
||||
|
||||
#include "dhcpd.h"
|
||||
#include "files.h"
|
||||
#include "options.h"
|
||||
#include "leases.h"
|
||||
#include "arpping.h"
|
||||
#include "common.h"
|
||||
|
||||
#include "static_leases.h"
|
||||
|
||||
|
||||
uint8_t blank_chaddr[] = {[0 ... 15] = 0};
|
||||
|
||||
/* clear every lease out that chaddr OR yiaddr matches and is nonzero */
|
||||
void clear_lease(uint8_t *chaddr, uint32_t yiaddr)
|
||||
{
|
||||
unsigned int i, j;
|
||||
|
||||
for (j = 0; j < 16 && !chaddr[j]; j++);
|
||||
|
||||
for (i = 0; i < server_config.max_leases; i++)
|
||||
if ((j != 16 && !memcmp(leases[i].chaddr, chaddr, 16)) ||
|
||||
(yiaddr && leases[i].yiaddr == yiaddr)) {
|
||||
memset(&(leases[i]), 0, sizeof(struct dhcpOfferedAddr));
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* add a lease into the table, clearing out any old ones */
|
||||
struct dhcpOfferedAddr *add_lease(uint8_t *chaddr, uint32_t yiaddr, unsigned long lease)
|
||||
{
|
||||
struct dhcpOfferedAddr *oldest;
|
||||
|
||||
/* clean out any old ones */
|
||||
clear_lease(chaddr, yiaddr);
|
||||
|
||||
oldest = oldest_expired_lease();
|
||||
|
||||
if (oldest) {
|
||||
memcpy(oldest->chaddr, chaddr, 16);
|
||||
oldest->yiaddr = yiaddr;
|
||||
oldest->expires = time(0) + lease;
|
||||
}
|
||||
|
||||
return oldest;
|
||||
}
|
||||
|
||||
|
||||
/* true if a lease has expired */
|
||||
int lease_expired(struct dhcpOfferedAddr *lease)
|
||||
{
|
||||
return (lease->expires < (unsigned long) time(0));
|
||||
}
|
||||
|
||||
|
||||
/* Find the oldest expired lease, NULL if there are no expired leases */
|
||||
struct dhcpOfferedAddr *oldest_expired_lease(void)
|
||||
{
|
||||
struct dhcpOfferedAddr *oldest = NULL;
|
||||
unsigned long oldest_lease = time(0);
|
||||
unsigned int i;
|
||||
|
||||
|
||||
for (i = 0; i < server_config.max_leases; i++)
|
||||
if (oldest_lease > leases[i].expires) {
|
||||
oldest_lease = leases[i].expires;
|
||||
oldest = &(leases[i]);
|
||||
}
|
||||
return oldest;
|
||||
|
||||
}
|
||||
|
||||
|
||||
/* Find the first lease that matches chaddr, NULL if no match */
|
||||
struct dhcpOfferedAddr *find_lease_by_chaddr(uint8_t *chaddr)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i < server_config.max_leases; i++)
|
||||
if (!memcmp(leases[i].chaddr, chaddr, 16)) return &(leases[i]);
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
/* Find the first lease that matches yiaddr, NULL is no match */
|
||||
struct dhcpOfferedAddr *find_lease_by_yiaddr(uint32_t yiaddr)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i < server_config.max_leases; i++)
|
||||
if (leases[i].yiaddr == yiaddr) return &(leases[i]);
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
/* check is an IP is taken, if it is, add it to the lease table */
|
||||
static int check_ip(uint32_t addr)
|
||||
{
|
||||
struct in_addr temp;
|
||||
|
||||
if (arpping(addr, server_config.server, server_config.arp, server_config.interface) == 0) {
|
||||
temp.s_addr = addr;
|
||||
LOG(LOG_INFO, "%s belongs to someone, reserving it for %ld seconds",
|
||||
inet_ntoa(temp), server_config.conflict_time);
|
||||
add_lease(blank_chaddr, addr, server_config.conflict_time);
|
||||
return 1;
|
||||
} else return 0;
|
||||
}
|
||||
|
||||
|
||||
/* find an assignable address, it check_expired is true, we check all the expired leases as well.
|
||||
* Maybe this should try expired leases by age... */
|
||||
uint32_t find_address(int check_expired)
|
||||
{
|
||||
uint32_t addr, ret;
|
||||
struct dhcpOfferedAddr *lease = NULL;
|
||||
|
||||
addr = ntohl(server_config.start); /* addr is in host order here */
|
||||
for (;addr <= ntohl(server_config.end); addr++) {
|
||||
|
||||
/* ie, 192.168.55.0 */
|
||||
if (!(addr & 0xFF)) continue;
|
||||
|
||||
/* ie, 192.168.55.255 */
|
||||
if ((addr & 0xFF) == 0xFF) continue;
|
||||
|
||||
/* Only do if it isn't an assigned as a static lease */
|
||||
if(!reservedIp(server_config.static_leases, htonl(addr)))
|
||||
{
|
||||
|
||||
/* lease is not taken */
|
||||
ret = htonl(addr);
|
||||
if ((!(lease = find_lease_by_yiaddr(ret)) ||
|
||||
|
||||
/* or it expired and we are checking for expired leases */
|
||||
(check_expired && lease_expired(lease))) &&
|
||||
|
||||
/* and it isn't on the network */
|
||||
!check_ip(ret)) {
|
||||
return ret;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1,23 +0,0 @@
|
|||
/* leases.h */
|
||||
#ifndef _LEASES_H
|
||||
#define _LEASES_H
|
||||
|
||||
|
||||
struct dhcpOfferedAddr {
|
||||
uint8_t chaddr[16];
|
||||
uint32_t yiaddr; /* network order */
|
||||
uint32_t expires; /* host order */
|
||||
};
|
||||
|
||||
extern uint8_t blank_chaddr[];
|
||||
|
||||
void clear_lease(uint8_t *chaddr, uint32_t yiaddr);
|
||||
struct dhcpOfferedAddr *add_lease(uint8_t *chaddr, uint32_t yiaddr, unsigned long lease);
|
||||
int lease_expired(struct dhcpOfferedAddr *lease);
|
||||
struct dhcpOfferedAddr *oldest_expired_lease(void);
|
||||
struct dhcpOfferedAddr *find_lease_by_chaddr(uint8_t *chaddr);
|
||||
struct dhcpOfferedAddr *find_lease_by_yiaddr(uint32_t yiaddr);
|
||||
uint32_t find_address(int check_expired);
|
||||
|
||||
|
||||
#endif
|
||||
|
|
@ -1,92 +0,0 @@
|
|||
/* libbb_udhcp.h - busybox compatability wrapper */
|
||||
|
||||
/* bit of a hack, do this no matter what the order of the includes.
|
||||
* (for busybox) */
|
||||
|
||||
#ifndef _LIBBB_UDHCP_H
|
||||
#define _LIBBB_UDHCP_H
|
||||
|
||||
#ifdef CONFIG_INSTALL_NO_USR
|
||||
# define DEFAULT_SCRIPT "/share/udhcpc/default.script"
|
||||
#else
|
||||
# define DEFAULT_SCRIPT "/usr/share/udhcpc/default.script"
|
||||
#endif
|
||||
|
||||
#ifdef IN_BUSYBOX
|
||||
#include "busybox.h"
|
||||
|
||||
#ifdef CONFIG_FEATURE_UDHCP_SYSLOG
|
||||
#define UDHCP_SYSLOG
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_FEATURE_UDHCP_DEBUG
|
||||
#define UDHCP_DEBUG
|
||||
#endif
|
||||
|
||||
#define COMBINED_BINARY
|
||||
#include "version.h"
|
||||
|
||||
#define xfopen bb_xfopen
|
||||
|
||||
/* make safe the exported namespace */
|
||||
/* from common.h */
|
||||
#define background udhcp_background
|
||||
#define start_log_and_pid udhcp_start_log_and_pid
|
||||
/* from script.h */
|
||||
#define run_script udhcp_run_script
|
||||
/* from packet.h */
|
||||
#define init_header udhcp_init_header
|
||||
#define get_packet udhcp_get_packet
|
||||
#define checksum udhcp_checksum
|
||||
#define raw_packet udhcp_raw_packet
|
||||
#define kernel_packet udhcp_kernel_packet
|
||||
/* from pidfile.h */
|
||||
#define pidfile_acquire udhcp_pidfile_acquire
|
||||
#define pidfile_write_release udhcp_pidfile_write_release
|
||||
/* from options.h */
|
||||
#define get_option udhcp_get_option
|
||||
#define end_option udhcp_end_option
|
||||
#define add_option_string udhcp_add_option_string
|
||||
#define add_simple_option udhcp_add_simple_option
|
||||
#define option_lengths udhcp_option_lengths
|
||||
/* from socket.h */
|
||||
#define listen_socket udhcp_listen_socket
|
||||
#define read_interface udhcp_read_interface
|
||||
/* from dhcpc.h */
|
||||
#define client_config udhcp_client_config
|
||||
/* from dhcpd.h */
|
||||
#define server_config udhcp_server_config
|
||||
|
||||
#else /* ! IN_BUSYBOX */
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <sys/sysinfo.h>
|
||||
|
||||
#ifndef ATTRIBUTE_NORETURN
|
||||
#define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
|
||||
#endif /* ATTRIBUTE_NORETURN */
|
||||
|
||||
#ifndef ATTRIBUTE_PACKED
|
||||
#define ATTRIBUTE_PACKED __attribute__ ((__packed__))
|
||||
#endif /* ATTRIBUTE_PACKED */
|
||||
|
||||
#define TRUE 1
|
||||
#define FALSE 0
|
||||
|
||||
#define xmalloc malloc
|
||||
#define xcalloc calloc
|
||||
|
||||
static inline FILE *xfopen(const char *file, const char *mode)
|
||||
{
|
||||
FILE *fp;
|
||||
if (!(fp = fopen(file, mode))) {
|
||||
perror("could not open input file");
|
||||
exit(0);
|
||||
}
|
||||
return fp;
|
||||
}
|
||||
|
||||
#endif /* IN_BUSYBOX */
|
||||
|
||||
#endif /* _LIBBB_UDHCP_H */
|
||||
|
|
@ -1,172 +0,0 @@
|
|||
/*
|
||||
* options.c -- DHCP server option packet tools
|
||||
* Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001
|
||||
*/
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "common.h"
|
||||
#include "dhcpd.h"
|
||||
#include "options.h"
|
||||
#include "files.h"
|
||||
|
||||
|
||||
/* supported options are easily added here */
|
||||
struct dhcp_option dhcp_options[] = {
|
||||
/* name[10] flags code */
|
||||
{"subnet", OPTION_IP | OPTION_REQ, 0x01},
|
||||
{"timezone", OPTION_S32, 0x02},
|
||||
{"router", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x03},
|
||||
{"timesvr", OPTION_IP | OPTION_LIST, 0x04},
|
||||
{"namesvr", OPTION_IP | OPTION_LIST, 0x05},
|
||||
{"dns", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x06},
|
||||
{"logsvr", OPTION_IP | OPTION_LIST, 0x07},
|
||||
{"cookiesvr", OPTION_IP | OPTION_LIST, 0x08},
|
||||
{"lprsvr", OPTION_IP | OPTION_LIST, 0x09},
|
||||
{"hostname", OPTION_STRING | OPTION_REQ, 0x0c},
|
||||
{"bootsize", OPTION_U16, 0x0d},
|
||||
{"domain", OPTION_STRING | OPTION_REQ, 0x0f},
|
||||
{"swapsvr", OPTION_IP, 0x10},
|
||||
{"rootpath", OPTION_STRING, 0x11},
|
||||
{"ipttl", OPTION_U8, 0x17},
|
||||
{"mtu", OPTION_U16, 0x1a},
|
||||
{"broadcast", OPTION_IP | OPTION_REQ, 0x1c},
|
||||
{"nisdomain", OPTION_STRING | OPTION_REQ, 0x28},
|
||||
{"nissrv", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x29},
|
||||
{"ntpsrv", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x2a},
|
||||
{"wins", OPTION_IP | OPTION_LIST, 0x2c},
|
||||
{"requestip", OPTION_IP, 0x32},
|
||||
{"lease", OPTION_U32, 0x33},
|
||||
{"dhcptype", OPTION_U8, 0x35},
|
||||
{"serverid", OPTION_IP, 0x36},
|
||||
{"message", OPTION_STRING, 0x38},
|
||||
{"tftp", OPTION_STRING, 0x42},
|
||||
{"bootfile", OPTION_STRING, 0x43},
|
||||
{"", 0x00, 0x00}
|
||||
};
|
||||
|
||||
/* Lengths of the different option types */
|
||||
int option_lengths[] = {
|
||||
[OPTION_IP] = 4,
|
||||
[OPTION_IP_PAIR] = 8,
|
||||
[OPTION_BOOLEAN] = 1,
|
||||
[OPTION_STRING] = 1,
|
||||
[OPTION_U8] = 1,
|
||||
[OPTION_U16] = 2,
|
||||
[OPTION_S16] = 2,
|
||||
[OPTION_U32] = 4,
|
||||
[OPTION_S32] = 4
|
||||
};
|
||||
|
||||
|
||||
/* get an option with bounds checking (warning, not aligned). */
|
||||
uint8_t *get_option(struct dhcpMessage *packet, int code)
|
||||
{
|
||||
int i, length;
|
||||
uint8_t *optionptr;
|
||||
int over = 0, done = 0, curr = OPTION_FIELD;
|
||||
|
||||
optionptr = packet->options;
|
||||
i = 0;
|
||||
length = 308;
|
||||
while (!done) {
|
||||
if (i >= length) {
|
||||
LOG(LOG_WARNING, "bogus packet, option fields too long.");
|
||||
return NULL;
|
||||
}
|
||||
if (optionptr[i + OPT_CODE] == code) {
|
||||
if (i + 1 + optionptr[i + OPT_LEN] >= length) {
|
||||
LOG(LOG_WARNING, "bogus packet, option fields too long.");
|
||||
return NULL;
|
||||
}
|
||||
return optionptr + i + 2;
|
||||
}
|
||||
switch (optionptr[i + OPT_CODE]) {
|
||||
case DHCP_PADDING:
|
||||
i++;
|
||||
break;
|
||||
case DHCP_OPTION_OVER:
|
||||
if (i + 1 + optionptr[i + OPT_LEN] >= length) {
|
||||
LOG(LOG_WARNING, "bogus packet, option fields too long.");
|
||||
return NULL;
|
||||
}
|
||||
over = optionptr[i + 3];
|
||||
i += optionptr[OPT_LEN] + 2;
|
||||
break;
|
||||
case DHCP_END:
|
||||
if (curr == OPTION_FIELD && over & FILE_FIELD) {
|
||||
optionptr = packet->file;
|
||||
i = 0;
|
||||
length = 128;
|
||||
curr = FILE_FIELD;
|
||||
} else if (curr == FILE_FIELD && over & SNAME_FIELD) {
|
||||
optionptr = packet->sname;
|
||||
i = 0;
|
||||
length = 64;
|
||||
curr = SNAME_FIELD;
|
||||
} else done = 1;
|
||||
break;
|
||||
default:
|
||||
i += optionptr[OPT_LEN + i] + 2;
|
||||
}
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
/* return the position of the 'end' option (no bounds checking) */
|
||||
int end_option(uint8_t *optionptr)
|
||||
{
|
||||
int i = 0;
|
||||
|
||||
while (optionptr[i] != DHCP_END) {
|
||||
if (optionptr[i] == DHCP_PADDING) i++;
|
||||
else i += optionptr[i + OPT_LEN] + 2;
|
||||
}
|
||||
return i;
|
||||
}
|
||||
|
||||
|
||||
/* add an option string to the options (an option string contains an option code,
|
||||
* length, then data) */
|
||||
int add_option_string(uint8_t *optionptr, uint8_t *string)
|
||||
{
|
||||
int end = end_option(optionptr);
|
||||
|
||||
/* end position + string length + option code/length + end option */
|
||||
if (end + string[OPT_LEN] + 2 + 1 >= 308) {
|
||||
LOG(LOG_ERR, "Option 0x%02x did not fit into the packet!", string[OPT_CODE]);
|
||||
return 0;
|
||||
}
|
||||
DEBUG(LOG_INFO, "adding option 0x%02x", string[OPT_CODE]);
|
||||
memcpy(optionptr + end, string, string[OPT_LEN] + 2);
|
||||
optionptr[end + string[OPT_LEN] + 2] = DHCP_END;
|
||||
return string[OPT_LEN] + 2;
|
||||
}
|
||||
|
||||
|
||||
/* add a one to four byte option to a packet */
|
||||
int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data)
|
||||
{
|
||||
struct dhcp_option *dh;
|
||||
|
||||
for (dh=dhcp_options; dh->code; dh++) {
|
||||
if (dh->code == code) {
|
||||
uint8_t option[6], len;
|
||||
|
||||
option[OPT_CODE] = code;
|
||||
len = option_lengths[dh->flags & TYPE_MASK];
|
||||
option[OPT_LEN] = len;
|
||||
if (__BYTE_ORDER == __BIG_ENDIAN)
|
||||
data <<= 8 * (4 - len);
|
||||
/* This memcpy is for broken processors which can't
|
||||
* handle a simple unaligned 32-bit assignment */
|
||||
memcpy(&option[OPT_DATA], &data, 4);
|
||||
return add_option_string(optionptr, option);
|
||||
}
|
||||
}
|
||||
|
||||
DEBUG(LOG_ERR, "Could not add option 0x%02x", code);
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1,38 +0,0 @@
|
|||
/* options.h */
|
||||
#ifndef _OPTIONS_H
|
||||
#define _OPTIONS_H
|
||||
|
||||
#include "packet.h"
|
||||
|
||||
#define TYPE_MASK 0x0F
|
||||
|
||||
enum {
|
||||
OPTION_IP=1,
|
||||
OPTION_IP_PAIR,
|
||||
OPTION_STRING,
|
||||
OPTION_BOOLEAN,
|
||||
OPTION_U8,
|
||||
OPTION_U16,
|
||||
OPTION_S16,
|
||||
OPTION_U32,
|
||||
OPTION_S32
|
||||
};
|
||||
|
||||
#define OPTION_REQ 0x10 /* have the client request this option */
|
||||
#define OPTION_LIST 0x20 /* There can be a list of 1 or more of these */
|
||||
|
||||
struct dhcp_option {
|
||||
char name[10];
|
||||
char flags;
|
||||
uint8_t code;
|
||||
};
|
||||
|
||||
extern struct dhcp_option dhcp_options[];
|
||||
extern int option_lengths[];
|
||||
|
||||
uint8_t *get_option(struct dhcpMessage *packet, int code);
|
||||
int end_option(uint8_t *optionptr);
|
||||
int add_option_string(uint8_t *optionptr, uint8_t *string);
|
||||
int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data);
|
||||
|
||||
#endif
|
||||
|
|
@ -1,207 +0,0 @@
|
|||
#include <unistd.h>
|
||||
#include <string.h>
|
||||
#include <netinet/in.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/socket.h>
|
||||
#include <features.h>
|
||||
#if __GLIBC__ >=2 && __GLIBC_MINOR >= 1
|
||||
#include <netpacket/packet.h>
|
||||
#include <net/ethernet.h>
|
||||
#else
|
||||
#include <asm/types.h>
|
||||
#include <linux/if_packet.h>
|
||||
#include <linux/if_ether.h>
|
||||
#endif
|
||||
#include <errno.h>
|
||||
|
||||
#include "packet.h"
|
||||
#include "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)
|
||||
{
|
||||
static const char broken_vendors[][8] = {
|
||||
"MSFT 98",
|
||||
""
|
||||
};
|
||||
int bytes;
|
||||
int i;
|
||||
char unsigned *vendor;
|
||||
|
||||
memset(packet, 0, sizeof(struct dhcpMessage));
|
||||
bytes = read(fd, packet, sizeof(struct dhcpMessage));
|
||||
if (bytes < 0) {
|
||||
DEBUG(LOG_INFO, "couldn't read on listening socket, ignoring");
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (ntohl(packet->cookie) != DHCP_MAGIC) {
|
||||
LOG(LOG_ERR, "received bogus message, ignoring");
|
||||
return -2;
|
||||
}
|
||||
DEBUG(LOG_INFO, "Received a packet");
|
||||
|
||||
if (packet->op == BOOTREQUEST && (vendor = get_option(packet, DHCP_VENDOR))) {
|
||||
for (i = 0; broken_vendors[i][0]; i++) {
|
||||
if (vendor[OPT_LEN - 2] == (uint8_t) strlen(broken_vendors[i]) &&
|
||||
!strncmp((char*)vendor, broken_vendors[i], vendor[OPT_LEN - 2])) {
|
||||
DEBUG(LOG_INFO, "broken client (%s), forcing broadcast",
|
||||
broken_vendors[i]);
|
||||
packet->flags |= htons(BROADCAST_FLAG);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return bytes;
|
||||
}
|
||||
|
||||
|
||||
uint16_t checksum(void *addr, int count)
|
||||
{
|
||||
/* Compute Internet Checksum for "count" bytes
|
||||
* beginning at location "addr".
|
||||
*/
|
||||
register int32_t sum = 0;
|
||||
uint16_t *source = (uint16_t *) addr;
|
||||
|
||||
while (count > 1) {
|
||||
/* This is the inner loop */
|
||||
sum += *source++;
|
||||
count -= 2;
|
||||
}
|
||||
|
||||
/* Add left-over byte, if any */
|
||||
if (count > 0) {
|
||||
/* Make sure that the left-over byte is added correctly both
|
||||
* with little and big endian hosts */
|
||||
uint16_t tmp = 0;
|
||||
*(uint8_t *) (&tmp) = * (uint8_t *) source;
|
||||
sum += tmp;
|
||||
}
|
||||
/* Fold 32-bit sum to 16 bits */
|
||||
while (sum >> 16)
|
||||
sum = (sum & 0xffff) + (sum >> 16);
|
||||
|
||||
return ~sum;
|
||||
}
|
||||
|
||||
|
||||
/* Construct a ip/udp header for a packet, and specify the source and dest hardware address */
|
||||
int raw_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
|
||||
uint32_t dest_ip, int dest_port, uint8_t *dest_arp, int ifindex)
|
||||
{
|
||||
int fd;
|
||||
int result;
|
||||
struct sockaddr_ll dest;
|
||||
struct udp_dhcp_packet packet;
|
||||
|
||||
if ((fd = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP))) < 0) {
|
||||
DEBUG(LOG_ERR, "socket call failed: %m");
|
||||
return -1;
|
||||
}
|
||||
|
||||
memset(&dest, 0, sizeof(dest));
|
||||
memset(&packet, 0, sizeof(packet));
|
||||
|
||||
dest.sll_family = AF_PACKET;
|
||||
dest.sll_protocol = htons(ETH_P_IP);
|
||||
dest.sll_ifindex = ifindex;
|
||||
dest.sll_halen = 6;
|
||||
memcpy(dest.sll_addr, dest_arp, 6);
|
||||
if (bind(fd, (struct sockaddr *)&dest, sizeof(struct sockaddr_ll)) < 0) {
|
||||
DEBUG(LOG_ERR, "bind call failed: %m");
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
|
||||
packet.ip.protocol = IPPROTO_UDP;
|
||||
packet.ip.saddr = source_ip;
|
||||
packet.ip.daddr = dest_ip;
|
||||
packet.udp.source = htons(source_port);
|
||||
packet.udp.dest = htons(dest_port);
|
||||
packet.udp.len = htons(sizeof(packet.udp) + sizeof(struct dhcpMessage)); /* cheat on the psuedo-header */
|
||||
packet.ip.tot_len = packet.udp.len;
|
||||
memcpy(&(packet.data), payload, sizeof(struct dhcpMessage));
|
||||
packet.udp.check = checksum(&packet, sizeof(struct udp_dhcp_packet));
|
||||
|
||||
packet.ip.tot_len = htons(sizeof(struct udp_dhcp_packet));
|
||||
packet.ip.ihl = sizeof(packet.ip) >> 2;
|
||||
packet.ip.version = IPVERSION;
|
||||
packet.ip.ttl = IPDEFTTL;
|
||||
packet.ip.check = checksum(&(packet.ip), sizeof(packet.ip));
|
||||
|
||||
result = sendto(fd, &packet, sizeof(struct udp_dhcp_packet), 0, (struct sockaddr *) &dest, sizeof(dest));
|
||||
if (result <= 0) {
|
||||
DEBUG(LOG_ERR, "write on socket failed: %m");
|
||||
}
|
||||
close(fd);
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
/* Let the kernel do all the work for packet generation */
|
||||
int kernel_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
|
||||
uint32_t dest_ip, int dest_port)
|
||||
{
|
||||
int n = 1;
|
||||
int fd, result;
|
||||
struct sockaddr_in client;
|
||||
|
||||
if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
|
||||
return -1;
|
||||
|
||||
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &n, sizeof(n)) == -1) {
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
|
||||
memset(&client, 0, sizeof(client));
|
||||
client.sin_family = AF_INET;
|
||||
client.sin_port = htons(source_port);
|
||||
client.sin_addr.s_addr = source_ip;
|
||||
|
||||
if (bind(fd, (struct sockaddr *)&client, sizeof(struct sockaddr)) == -1) {
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
|
||||
memset(&client, 0, sizeof(client));
|
||||
client.sin_family = AF_INET;
|
||||
client.sin_port = htons(dest_port);
|
||||
client.sin_addr.s_addr = dest_ip;
|
||||
|
||||
if (connect(fd, (struct sockaddr *)&client, sizeof(struct sockaddr)) == -1) {
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
|
||||
result = write(fd, payload, sizeof(struct dhcpMessage));
|
||||
close(fd);
|
||||
return result;
|
||||
}
|
||||
|
|
@ -1,41 +0,0 @@
|
|||
#ifndef _PACKET_H
|
||||
#define _PACKET_H
|
||||
|
||||
#include <netinet/udp.h>
|
||||
#include <netinet/ip.h>
|
||||
|
||||
struct dhcpMessage {
|
||||
uint8_t op;
|
||||
uint8_t htype;
|
||||
uint8_t hlen;
|
||||
uint8_t hops;
|
||||
uint32_t xid;
|
||||
uint16_t secs;
|
||||
uint16_t flags;
|
||||
uint32_t ciaddr;
|
||||
uint32_t yiaddr;
|
||||
uint32_t siaddr;
|
||||
uint32_t giaddr;
|
||||
uint8_t chaddr[16];
|
||||
uint8_t sname[64];
|
||||
uint8_t file[128];
|
||||
uint32_t cookie;
|
||||
uint8_t options[308]; /* 312 - cookie */
|
||||
};
|
||||
|
||||
struct udp_dhcp_packet {
|
||||
struct iphdr ip;
|
||||
struct udphdr udp;
|
||||
struct dhcpMessage data;
|
||||
};
|
||||
|
||||
void init_header(struct dhcpMessage *packet, char type);
|
||||
int get_packet(struct dhcpMessage *packet, int fd);
|
||||
uint16_t checksum(void *addr, int count);
|
||||
int raw_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
|
||||
uint32_t dest_ip, int dest_port, uint8_t *dest_arp, int ifindex);
|
||||
int kernel_packet(struct dhcpMessage *payload, uint32_t source_ip, int source_port,
|
||||
uint32_t dest_ip, int dest_port);
|
||||
|
||||
|
||||
#endif
|
||||
|
|
@ -1,75 +0,0 @@
|
|||
/* pidfile.c
|
||||
*
|
||||
* Functions to assist in the writing and removing of pidfiles.
|
||||
*
|
||||
* Russ Dill <Russ.Dill@asu.edu> September 2001
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
#include <unistd.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#include "pidfile.h"
|
||||
#include "common.h"
|
||||
|
||||
static char *saved_pidfile;
|
||||
|
||||
static void pidfile_delete(void)
|
||||
{
|
||||
if (saved_pidfile) unlink(saved_pidfile);
|
||||
}
|
||||
|
||||
|
||||
int pidfile_acquire(const char *pidfile)
|
||||
{
|
||||
int pid_fd;
|
||||
if (!pidfile) return -1;
|
||||
|
||||
pid_fd = open(pidfile, O_CREAT | O_WRONLY, 0644);
|
||||
if (pid_fd < 0) {
|
||||
LOG(LOG_ERR, "Unable to open pidfile %s: %m\n", pidfile);
|
||||
} else {
|
||||
lockf(pid_fd, F_LOCK, 0);
|
||||
if (!saved_pidfile)
|
||||
atexit(pidfile_delete);
|
||||
saved_pidfile = (char *) pidfile;
|
||||
}
|
||||
|
||||
return pid_fd;
|
||||
}
|
||||
|
||||
|
||||
void pidfile_write_release(int pid_fd)
|
||||
{
|
||||
FILE *out;
|
||||
|
||||
if (pid_fd < 0) return;
|
||||
|
||||
if ((out = fdopen(pid_fd, "w")) != NULL) {
|
||||
fprintf(out, "%d\n", getpid());
|
||||
fclose(out);
|
||||
}
|
||||
lockf(pid_fd, F_UNLCK, 0);
|
||||
close(pid_fd);
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
|
@ -1,25 +0,0 @@
|
|||
/* pidfile.h
|
||||
*
|
||||
* Functions to assist in the writing and removing of pidfiles.
|
||||
*
|
||||
* Russ Dill <Russ.Dill@asu.edu> September 2001
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
|
||||
int pidfile_acquire(const char *pidfile);
|
||||
void pidfile_write_release(int pid_fd);
|
||||
|
||||
|
|
@ -1,234 +0,0 @@
|
|||
/* script.c
|
||||
*
|
||||
* Functions to call the DHCP client notification scripts
|
||||
*
|
||||
* Russ Dill <Russ.Dill@asu.edu> July 2001
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <sys/socket.h>
|
||||
#include <netinet/in.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/wait.h>
|
||||
|
||||
#include "common.h"
|
||||
#include "options.h"
|
||||
#include "dhcpd.h"
|
||||
#include "dhcpc.h"
|
||||
#include "script.h"
|
||||
|
||||
/* get a rough idea of how long an option will be (rounding up...) */
|
||||
static const int max_option_length[] = {
|
||||
[OPTION_IP] = sizeof("255.255.255.255 "),
|
||||
[OPTION_IP_PAIR] = sizeof("255.255.255.255 ") * 2,
|
||||
[OPTION_STRING] = 1,
|
||||
[OPTION_BOOLEAN] = sizeof("yes "),
|
||||
[OPTION_U8] = sizeof("255 "),
|
||||
[OPTION_U16] = sizeof("65535 "),
|
||||
[OPTION_S16] = sizeof("-32768 "),
|
||||
[OPTION_U32] = sizeof("4294967295 "),
|
||||
[OPTION_S32] = sizeof("-2147483684 "),
|
||||
};
|
||||
|
||||
|
||||
static inline int upper_length(int length, int opt_index)
|
||||
{
|
||||
return max_option_length[opt_index] *
|
||||
(length / option_lengths[opt_index]);
|
||||
}
|
||||
|
||||
|
||||
static int sprintip(char *dest, char *pre, uint8_t *ip)
|
||||
{
|
||||
return sprintf(dest, "%s%d.%d.%d.%d", pre, ip[0], ip[1], ip[2], ip[3]);
|
||||
}
|
||||
|
||||
|
||||
/* really simple implementation, just count the bits */
|
||||
static int mton(struct in_addr *mask)
|
||||
{
|
||||
int i;
|
||||
unsigned long bits = ntohl(mask->s_addr);
|
||||
/* too bad one can't check the carry bit, etc in c bit
|
||||
* shifting */
|
||||
for (i = 0; i < 32 && !((bits >> i) & 1); i++);
|
||||
return 32 - i;
|
||||
}
|
||||
|
||||
|
||||
/* Fill dest with the text of option 'option'. */
|
||||
static void fill_options(char *dest, uint8_t *option, struct dhcp_option *type_p)
|
||||
{
|
||||
int type, optlen;
|
||||
uint16_t val_u16;
|
||||
int16_t val_s16;
|
||||
uint32_t val_u32;
|
||||
int32_t val_s32;
|
||||
int len = option[OPT_LEN - 2];
|
||||
|
||||
dest += sprintf(dest, "%s=", type_p->name);
|
||||
|
||||
type = type_p->flags & TYPE_MASK;
|
||||
optlen = option_lengths[type];
|
||||
for(;;) {
|
||||
switch (type) {
|
||||
case OPTION_IP_PAIR:
|
||||
dest += sprintip(dest, "", option);
|
||||
*(dest++) = '/';
|
||||
option += 4;
|
||||
optlen = 4;
|
||||
case OPTION_IP: /* Works regardless of host byte order. */
|
||||
dest += sprintip(dest, "", option);
|
||||
break;
|
||||
case OPTION_BOOLEAN:
|
||||
dest += sprintf(dest, *option ? "yes" : "no");
|
||||
break;
|
||||
case OPTION_U8:
|
||||
dest += sprintf(dest, "%u", *option);
|
||||
break;
|
||||
case OPTION_U16:
|
||||
memcpy(&val_u16, option, 2);
|
||||
dest += sprintf(dest, "%u", ntohs(val_u16));
|
||||
break;
|
||||
case OPTION_S16:
|
||||
memcpy(&val_s16, option, 2);
|
||||
dest += sprintf(dest, "%d", ntohs(val_s16));
|
||||
break;
|
||||
case OPTION_U32:
|
||||
memcpy(&val_u32, option, 4);
|
||||
dest += sprintf(dest, "%lu", (unsigned long) ntohl(val_u32));
|
||||
break;
|
||||
case OPTION_S32:
|
||||
memcpy(&val_s32, option, 4);
|
||||
dest += sprintf(dest, "%ld", (long) ntohl(val_s32));
|
||||
break;
|
||||
case OPTION_STRING:
|
||||
memcpy(dest, option, len);
|
||||
dest[len] = '\0';
|
||||
return; /* Short circuit this case */
|
||||
}
|
||||
option += optlen;
|
||||
len -= optlen;
|
||||
if (len <= 0) break;
|
||||
dest += sprintf(dest, " ");
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* put all the parameters into an environment */
|
||||
static char **fill_envp(struct dhcpMessage *packet)
|
||||
{
|
||||
int num_options = 0;
|
||||
int i, j;
|
||||
char **envp;
|
||||
uint8_t *temp;
|
||||
struct in_addr subnet;
|
||||
char over = 0;
|
||||
|
||||
if (packet == NULL)
|
||||
num_options = 0;
|
||||
else {
|
||||
for (i = 0; dhcp_options[i].code; i++)
|
||||
if (get_option(packet, dhcp_options[i].code)) {
|
||||
num_options++;
|
||||
if (dhcp_options[i].code == DHCP_SUBNET)
|
||||
num_options++; /* for mton */
|
||||
}
|
||||
if (packet->siaddr) num_options++;
|
||||
if ((temp = get_option(packet, DHCP_OPTION_OVER)))
|
||||
over = *temp;
|
||||
if (!(over & FILE_FIELD) && packet->file[0]) num_options++;
|
||||
if (!(over & SNAME_FIELD) && packet->sname[0]) num_options++;
|
||||
}
|
||||
|
||||
envp = xcalloc(sizeof(char *), num_options + 5);
|
||||
j = 0;
|
||||
asprintf(&envp[j++], "interface=%s", client_config.interface);
|
||||
asprintf(&envp[j++], "%s=%s", "PATH",
|
||||
getenv("PATH") ? : "/bin:/usr/bin:/sbin:/usr/sbin");
|
||||
asprintf(&envp[j++], "%s=%s", "HOME", getenv("HOME") ? : "/");
|
||||
|
||||
if (packet == NULL) return envp;
|
||||
|
||||
envp[j] = xmalloc(sizeof("ip=255.255.255.255"));
|
||||
sprintip(envp[j++], "ip=", (uint8_t *) &packet->yiaddr);
|
||||
|
||||
|
||||
for (i = 0; dhcp_options[i].code; i++) {
|
||||
if (!(temp = get_option(packet, dhcp_options[i].code)))
|
||||
continue;
|
||||
envp[j] = xmalloc(upper_length(temp[OPT_LEN - 2],
|
||||
dhcp_options[i].flags & TYPE_MASK) + strlen(dhcp_options[i].name) + 2);
|
||||
fill_options(envp[j++], temp, &dhcp_options[i]);
|
||||
|
||||
/* Fill in a subnet bits option for things like /24 */
|
||||
if (dhcp_options[i].code == DHCP_SUBNET) {
|
||||
memcpy(&subnet, temp, 4);
|
||||
asprintf(&envp[j++], "mask=%d", mton(&subnet));
|
||||
}
|
||||
}
|
||||
if (packet->siaddr) {
|
||||
envp[j] = xmalloc(sizeof("siaddr=255.255.255.255"));
|
||||
sprintip(envp[j++], "siaddr=", (uint8_t *) &packet->siaddr);
|
||||
}
|
||||
if (!(over & FILE_FIELD) && packet->file[0]) {
|
||||
/* watch out for invalid packets */
|
||||
packet->file[sizeof(packet->file) - 1] = '\0';
|
||||
asprintf(&envp[j++], "boot_file=%s", packet->file);
|
||||
}
|
||||
if (!(over & SNAME_FIELD) && packet->sname[0]) {
|
||||
/* watch out for invalid packets */
|
||||
packet->sname[sizeof(packet->sname) - 1] = '\0';
|
||||
asprintf(&envp[j++], "sname=%s", packet->sname);
|
||||
}
|
||||
return envp;
|
||||
}
|
||||
|
||||
|
||||
/* Call a script with a par file and env vars */
|
||||
void run_script(struct dhcpMessage *packet, const char *name)
|
||||
{
|
||||
int pid;
|
||||
char **envp, **curr;
|
||||
|
||||
if (client_config.script == NULL)
|
||||
return;
|
||||
|
||||
DEBUG(LOG_INFO, "vforking and execle'ing %s", client_config.script);
|
||||
|
||||
envp = fill_envp(packet);
|
||||
/* call script */
|
||||
pid = vfork();
|
||||
if (pid) {
|
||||
waitpid(pid, NULL, 0);
|
||||
for (curr = envp; *curr; curr++) free(*curr);
|
||||
free(envp);
|
||||
return;
|
||||
} else if (pid == 0) {
|
||||
/* close fd's? */
|
||||
|
||||
/* exec script */
|
||||
execle(client_config.script, client_config.script,
|
||||
name, NULL, envp);
|
||||
LOG(LOG_ERR, "script %s failed: %m", client_config.script);
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
|
|
@ -1,6 +0,0 @@
|
|||
#ifndef _SCRIPT_H
|
||||
#define _SCRIPT_H
|
||||
|
||||
extern void run_script(struct dhcpMessage *packet, const char *name);
|
||||
|
||||
#endif
|
||||
|
|
@ -1,275 +0,0 @@
|
|||
/* serverpacket.c
|
||||
*
|
||||
* Construct and send DHCP server packets
|
||||
*
|
||||
* Russ Dill <Russ.Dill@asu.edu> July 2001
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#include <sys/socket.h>
|
||||
#include <netinet/in.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <string.h>
|
||||
#include <time.h>
|
||||
|
||||
#include "common.h"
|
||||
#include "serverpacket.h"
|
||||
#include "dhcpd.h"
|
||||
#include "options.h"
|
||||
#include "static_leases.h"
|
||||
|
||||
/* send a packet to giaddr using the kernel ip stack */
|
||||
static int send_packet_to_relay(struct dhcpMessage *payload)
|
||||
{
|
||||
DEBUG(LOG_INFO, "Forwarding packet to relay");
|
||||
|
||||
return kernel_packet(payload, server_config.server, SERVER_PORT,
|
||||
payload->giaddr, SERVER_PORT);
|
||||
}
|
||||
|
||||
|
||||
/* send a packet to a specific arp address and ip address by creating our own ip packet */
|
||||
static int send_packet_to_client(struct dhcpMessage *payload, int force_broadcast)
|
||||
{
|
||||
uint8_t *chaddr;
|
||||
uint32_t ciaddr;
|
||||
|
||||
if (force_broadcast) {
|
||||
DEBUG(LOG_INFO, "broadcasting packet to client (NAK)");
|
||||
ciaddr = INADDR_BROADCAST;
|
||||
chaddr = MAC_BCAST_ADDR;
|
||||
} else if (payload->ciaddr) {
|
||||
DEBUG(LOG_INFO, "unicasting packet to client ciaddr");
|
||||
ciaddr = payload->ciaddr;
|
||||
chaddr = payload->chaddr;
|
||||
} else if (ntohs(payload->flags) & BROADCAST_FLAG) {
|
||||
DEBUG(LOG_INFO, "broadcasting packet to client (requested)");
|
||||
ciaddr = INADDR_BROADCAST;
|
||||
chaddr = MAC_BCAST_ADDR;
|
||||
} else {
|
||||
DEBUG(LOG_INFO, "unicasting packet to client yiaddr");
|
||||
ciaddr = payload->yiaddr;
|
||||
chaddr = payload->chaddr;
|
||||
}
|
||||
return raw_packet(payload, server_config.server, SERVER_PORT,
|
||||
ciaddr, CLIENT_PORT, chaddr, server_config.ifindex);
|
||||
}
|
||||
|
||||
|
||||
/* send a dhcp packet, if force broadcast is set, the packet will be broadcast to the client */
|
||||
static int send_packet(struct dhcpMessage *payload, int force_broadcast)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (payload->giaddr)
|
||||
ret = send_packet_to_relay(payload);
|
||||
else ret = send_packet_to_client(payload, force_broadcast);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
static void init_packet(struct dhcpMessage *packet, struct dhcpMessage *oldpacket, char type)
|
||||
{
|
||||
init_header(packet, type);
|
||||
packet->xid = oldpacket->xid;
|
||||
memcpy(packet->chaddr, oldpacket->chaddr, 16);
|
||||
packet->flags = oldpacket->flags;
|
||||
packet->giaddr = oldpacket->giaddr;
|
||||
packet->ciaddr = oldpacket->ciaddr;
|
||||
add_simple_option(packet->options, DHCP_SERVER_ID, server_config.server);
|
||||
}
|
||||
|
||||
|
||||
/* add in the bootp options */
|
||||
static void add_bootp_options(struct dhcpMessage *packet)
|
||||
{
|
||||
packet->siaddr = server_config.siaddr;
|
||||
if (server_config.sname)
|
||||
strncpy((char*)packet->sname, server_config.sname, sizeof(packet->sname) - 1);
|
||||
if (server_config.boot_file)
|
||||
strncpy((char*)packet->file, server_config.boot_file, sizeof(packet->file) - 1);
|
||||
}
|
||||
|
||||
|
||||
/* send a DHCP OFFER to a DHCP DISCOVER */
|
||||
int sendOffer(struct dhcpMessage *oldpacket)
|
||||
{
|
||||
struct dhcpMessage packet;
|
||||
struct dhcpOfferedAddr *lease = NULL;
|
||||
uint32_t req_align, lease_time_align = server_config.lease;
|
||||
uint8_t *req, *lease_time;
|
||||
struct option_set *curr;
|
||||
struct in_addr addr;
|
||||
|
||||
uint32_t static_lease_ip;
|
||||
|
||||
init_packet(&packet, oldpacket, DHCPOFFER);
|
||||
|
||||
static_lease_ip = getIpByMac(server_config.static_leases, oldpacket->chaddr);
|
||||
|
||||
/* ADDME: if static, short circuit */
|
||||
if(!static_lease_ip)
|
||||
{
|
||||
/* the client is in our lease/offered table */
|
||||
if ((lease = find_lease_by_chaddr(oldpacket->chaddr))) {
|
||||
if (!lease_expired(lease))
|
||||
lease_time_align = lease->expires - time(0);
|
||||
packet.yiaddr = lease->yiaddr;
|
||||
|
||||
/* Or the client has a requested ip */
|
||||
} else if ((req = get_option(oldpacket, DHCP_REQUESTED_IP)) &&
|
||||
|
||||
/* Don't look here (ugly hackish thing to do) */
|
||||
memcpy(&req_align, req, 4) &&
|
||||
|
||||
/* and the ip is in the lease range */
|
||||
ntohl(req_align) >= ntohl(server_config.start) &&
|
||||
ntohl(req_align) <= ntohl(server_config.end) &&
|
||||
|
||||
!static_lease_ip && /* Check that its not a static lease */
|
||||
/* and is not already taken/offered */
|
||||
((!(lease = find_lease_by_yiaddr(req_align)) ||
|
||||
|
||||
/* or its taken, but expired */ /* ADDME: or maybe in here */
|
||||
lease_expired(lease)))) {
|
||||
packet.yiaddr = req_align; /* FIXME: oh my, is there a host using this IP? */
|
||||
|
||||
/* otherwise, find a free IP */
|
||||
} else {
|
||||
/* Is it a static lease? (No, because find_address skips static lease) */
|
||||
packet.yiaddr = find_address(0);
|
||||
|
||||
/* try for an expired lease */
|
||||
if (!packet.yiaddr) packet.yiaddr = find_address(1);
|
||||
}
|
||||
|
||||
if(!packet.yiaddr) {
|
||||
LOG(LOG_WARNING, "no IP addresses to give -- OFFER abandoned");
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (!add_lease(packet.chaddr, packet.yiaddr, server_config.offer_time)) {
|
||||
LOG(LOG_WARNING, "lease pool is full -- OFFER abandoned");
|
||||
return -1;
|
||||
}
|
||||
|
||||
if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
|
||||
memcpy(&lease_time_align, lease_time, 4);
|
||||
lease_time_align = ntohl(lease_time_align);
|
||||
if (lease_time_align > server_config.lease)
|
||||
lease_time_align = server_config.lease;
|
||||
}
|
||||
|
||||
/* Make sure we aren't just using the lease time from the previous offer */
|
||||
if (lease_time_align < server_config.min_lease)
|
||||
lease_time_align = server_config.lease;
|
||||
}
|
||||
/* ADDME: end of short circuit */
|
||||
else
|
||||
{
|
||||
/* It is a static lease... use it */
|
||||
packet.yiaddr = static_lease_ip;
|
||||
}
|
||||
|
||||
add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));
|
||||
|
||||
curr = server_config.options;
|
||||
while (curr) {
|
||||
if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
|
||||
add_option_string(packet.options, curr->data);
|
||||
curr = curr->next;
|
||||
}
|
||||
|
||||
add_bootp_options(&packet);
|
||||
|
||||
addr.s_addr = packet.yiaddr;
|
||||
LOG(LOG_INFO, "sending OFFER of %s", inet_ntoa(addr));
|
||||
return send_packet(&packet, 0);
|
||||
}
|
||||
|
||||
|
||||
int sendNAK(struct dhcpMessage *oldpacket)
|
||||
{
|
||||
struct dhcpMessage packet;
|
||||
|
||||
init_packet(&packet, oldpacket, DHCPNAK);
|
||||
|
||||
DEBUG(LOG_INFO, "sending NAK");
|
||||
return send_packet(&packet, 1);
|
||||
}
|
||||
|
||||
|
||||
int sendACK(struct dhcpMessage *oldpacket, uint32_t yiaddr)
|
||||
{
|
||||
struct dhcpMessage packet;
|
||||
struct option_set *curr;
|
||||
uint8_t *lease_time;
|
||||
uint32_t lease_time_align = server_config.lease;
|
||||
struct in_addr addr;
|
||||
|
||||
init_packet(&packet, oldpacket, DHCPACK);
|
||||
packet.yiaddr = yiaddr;
|
||||
|
||||
if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
|
||||
memcpy(&lease_time_align, lease_time, 4);
|
||||
lease_time_align = ntohl(lease_time_align);
|
||||
if (lease_time_align > server_config.lease)
|
||||
lease_time_align = server_config.lease;
|
||||
else if (lease_time_align < server_config.min_lease)
|
||||
lease_time_align = server_config.lease;
|
||||
}
|
||||
|
||||
add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));
|
||||
|
||||
curr = server_config.options;
|
||||
while (curr) {
|
||||
if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
|
||||
add_option_string(packet.options, curr->data);
|
||||
curr = curr->next;
|
||||
}
|
||||
|
||||
add_bootp_options(&packet);
|
||||
|
||||
addr.s_addr = packet.yiaddr;
|
||||
LOG(LOG_INFO, "sending ACK to %s", inet_ntoa(addr));
|
||||
|
||||
if (send_packet(&packet, 0) < 0)
|
||||
return -1;
|
||||
|
||||
add_lease(packet.chaddr, packet.yiaddr, lease_time_align);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int send_inform(struct dhcpMessage *oldpacket)
|
||||
{
|
||||
struct dhcpMessage packet;
|
||||
struct option_set *curr;
|
||||
|
||||
init_packet(&packet, oldpacket, DHCPACK);
|
||||
|
||||
curr = server_config.options;
|
||||
while (curr) {
|
||||
if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
|
||||
add_option_string(packet.options, curr->data);
|
||||
curr = curr->next;
|
||||
}
|
||||
|
||||
add_bootp_options(&packet);
|
||||
|
||||
return send_packet(&packet, 0);
|
||||
}
|
||||
|
|
@ -1,12 +0,0 @@
|
|||
#ifndef _SERVERPACKET_H
|
||||
#define _SERVERPACKET_H
|
||||
|
||||
#include "packet.h"
|
||||
|
||||
int sendOffer(struct dhcpMessage *oldpacket);
|
||||
int sendNAK(struct dhcpMessage *oldpacket);
|
||||
int sendACK(struct dhcpMessage *oldpacket, uint32_t yiaddr);
|
||||
int send_inform(struct dhcpMessage *oldpacket);
|
||||
|
||||
|
||||
#endif
|
||||
|
|
@ -1,78 +0,0 @@
|
|||
/* signalpipe.c
|
||||
*
|
||||
* Signal pipe infrastructure. A reliable way of delivering signals.
|
||||
*
|
||||
* Russ Dill <Russ.Dill@asu.edu> December 2003
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#include <unistd.h>
|
||||
#include <signal.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/socket.h>
|
||||
#include <sys/select.h>
|
||||
|
||||
|
||||
#include "signalpipe.h"
|
||||
#include "common.h"
|
||||
|
||||
static int signal_pipe[2];
|
||||
|
||||
static void signal_handler(int sig)
|
||||
{
|
||||
if (send(signal_pipe[1], &sig, sizeof(sig), MSG_DONTWAIT) < 0)
|
||||
DEBUG(LOG_ERR, "Could not send signal: %m");
|
||||
}
|
||||
|
||||
|
||||
/* Call this before doing anything else. Sets up the socket pair
|
||||
* and installs the signal handler */
|
||||
void udhcp_sp_setup(void)
|
||||
{
|
||||
socketpair(AF_UNIX, SOCK_STREAM, 0, signal_pipe);
|
||||
signal(SIGUSR1, signal_handler);
|
||||
signal(SIGUSR2, signal_handler);
|
||||
signal(SIGTERM, signal_handler);
|
||||
}
|
||||
|
||||
|
||||
/* Quick little function to setup the rfds. Will return the
|
||||
* max_fd for use with select. Limited in that you can only pass
|
||||
* one extra fd */
|
||||
int udhcp_sp_fd_set(fd_set *rfds, int extra_fd)
|
||||
{
|
||||
FD_ZERO(rfds);
|
||||
FD_SET(signal_pipe[0], rfds);
|
||||
if (extra_fd >= 0) FD_SET(extra_fd, rfds);
|
||||
return signal_pipe[0] > extra_fd ? signal_pipe[0] : extra_fd;
|
||||
}
|
||||
|
||||
|
||||
/* Read a signal from the signal pipe. Returns 0 if there is
|
||||
* no signal, -1 on error (and sets errno appropriately), and
|
||||
* your signal on success */
|
||||
int udhcp_sp_read(fd_set *rfds)
|
||||
{
|
||||
int sig;
|
||||
|
||||
if (!FD_ISSET(signal_pipe[0], rfds))
|
||||
return 0;
|
||||
|
||||
if (read(signal_pipe[0], &sig, sizeof(sig)) < 0)
|
||||
return -1;
|
||||
|
||||
return sig;
|
||||
}
|
||||
|
|
@ -1,22 +0,0 @@
|
|||
/* signalpipe.h
|
||||
*
|
||||
* Russ Dill <Russ.Dill@asu.edu> December 2003
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
void udhcp_sp_setup(void);
|
||||
int udhcp_sp_fd_set(fd_set *rfds, int extra_fd);
|
||||
int udhcp_sp_read(fd_set *rfds);
|
||||
|
|
@ -1,135 +0,0 @@
|
|||
/*
|
||||
* 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 "socket.h"
|
||||
#include "common.h"
|
||||
|
||||
int read_interface(char *interface, int *ifindex, uint32_t *addr, uint8_t *arp)
|
||||
{
|
||||
int fd;
|
||||
struct ifreq ifr;
|
||||
struct sockaddr_in *our_ip;
|
||||
|
||||
memset(&ifr, 0, sizeof(struct ifreq));
|
||||
if((fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) >= 0) {
|
||||
ifr.ifr_addr.sa_family = AF_INET;
|
||||
strcpy(ifr.ifr_name, interface);
|
||||
|
||||
if (addr) {
|
||||
if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
|
||||
our_ip = (struct sockaddr_in *) &ifr.ifr_addr;
|
||||
*addr = our_ip->sin_addr.s_addr;
|
||||
DEBUG(LOG_INFO, "%s (our ip) = %s", ifr.ifr_name, inet_ntoa(our_ip->sin_addr));
|
||||
} else {
|
||||
LOG(LOG_ERR, "SIOCGIFADDR failed, is the interface up and configured?: %m");
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
if (ioctl(fd, SIOCGIFINDEX, &ifr) == 0) {
|
||||
DEBUG(LOG_INFO, "adapter index %d", ifr.ifr_ifindex);
|
||||
*ifindex = ifr.ifr_ifindex;
|
||||
} else {
|
||||
LOG(LOG_ERR, "SIOCGIFINDEX failed!: %m");
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
if (ioctl(fd, SIOCGIFHWADDR, &ifr) == 0) {
|
||||
memcpy(arp, ifr.ifr_hwaddr.sa_data, 6);
|
||||
DEBUG(LOG_INFO, "adapter hardware address %02x:%02x:%02x:%02x:%02x:%02x",
|
||||
arp[0], arp[1], arp[2], arp[3], arp[4], arp[5]);
|
||||
} else {
|
||||
LOG(LOG_ERR, "SIOCGIFHWADDR failed!: %m");
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
} else {
|
||||
LOG(LOG_ERR, "socket failed!: %m");
|
||||
return -1;
|
||||
}
|
||||
close(fd);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int listen_socket(uint32_t ip, int port, char *inf)
|
||||
{
|
||||
struct ifreq interface;
|
||||
int fd;
|
||||
struct sockaddr_in addr;
|
||||
int n = 1;
|
||||
|
||||
DEBUG(LOG_INFO, "Opening listen socket on 0x%08x:%d %s", ip, port, inf);
|
||||
if ((fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
|
||||
DEBUG(LOG_ERR, "socket call failed: %m");
|
||||
return -1;
|
||||
}
|
||||
|
||||
memset(&addr, 0, sizeof(addr));
|
||||
addr.sin_family = AF_INET;
|
||||
addr.sin_port = htons(port);
|
||||
addr.sin_addr.s_addr = ip;
|
||||
|
||||
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &n, sizeof(n)) == -1) {
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, (char *) &n, sizeof(n)) == -1) {
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
|
||||
strncpy(interface.ifr_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;
|
||||
}
|
||||
|
|
@ -1,8 +0,0 @@
|
|||
/* socket.h */
|
||||
#ifndef _SOCKET_H
|
||||
#define _SOCKET_H
|
||||
|
||||
int read_interface(char *interface, int *ifindex, uint32_t *addr, uint8_t *arp);
|
||||
int listen_socket(uint32_t ip, int port, char *inf);
|
||||
|
||||
#endif
|
||||
|
|
@ -1,119 +0,0 @@
|
|||
/*
|
||||
* static_leases.c -- Couple of functions to assist with storing and
|
||||
* retrieving data for static leases
|
||||
*
|
||||
* Wade Berrier <wberrier@myrealbox.com> September 2004
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "static_leases.h"
|
||||
#include "dhcpd.h"
|
||||
|
||||
/* Takes the address of the pointer to the static_leases linked list,
|
||||
* Address to a 6 byte mac address
|
||||
* Address to a 4 byte ip address */
|
||||
int addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t *ip)
|
||||
{
|
||||
|
||||
struct static_lease *cur;
|
||||
struct static_lease *new_static_lease;
|
||||
|
||||
/* Build new node */
|
||||
new_static_lease = xmalloc(sizeof(struct static_lease));
|
||||
new_static_lease->mac = mac;
|
||||
new_static_lease->ip = ip;
|
||||
new_static_lease->next = NULL;
|
||||
|
||||
/* If it's the first node to be added... */
|
||||
if(*lease_struct == NULL)
|
||||
{
|
||||
*lease_struct = new_static_lease;
|
||||
}
|
||||
else
|
||||
{
|
||||
cur = *lease_struct;
|
||||
while(cur->next != NULL)
|
||||
{
|
||||
cur = cur->next;
|
||||
}
|
||||
|
||||
cur->next = new_static_lease;
|
||||
}
|
||||
|
||||
return 1;
|
||||
|
||||
}
|
||||
|
||||
/* Check to see if a mac has an associated static lease */
|
||||
uint32_t getIpByMac(struct static_lease *lease_struct, void *arg)
|
||||
{
|
||||
uint32_t return_ip;
|
||||
struct static_lease *cur = lease_struct;
|
||||
uint8_t *mac = arg;
|
||||
|
||||
return_ip = 0;
|
||||
|
||||
while(cur != NULL)
|
||||
{
|
||||
/* If the client has the correct mac */
|
||||
if(memcmp(cur->mac, mac, 6) == 0)
|
||||
{
|
||||
return_ip = *(cur->ip);
|
||||
}
|
||||
|
||||
cur = cur->next;
|
||||
}
|
||||
|
||||
return return_ip;
|
||||
|
||||
}
|
||||
|
||||
/* Check to see if an ip is reserved as a static ip */
|
||||
uint32_t reservedIp(struct static_lease *lease_struct, uint32_t ip)
|
||||
{
|
||||
struct static_lease *cur = lease_struct;
|
||||
|
||||
uint32_t return_val = 0;
|
||||
|
||||
while(cur != NULL)
|
||||
{
|
||||
/* If the client has the correct ip */
|
||||
if(*cur->ip == ip)
|
||||
return_val = 1;
|
||||
|
||||
cur = cur->next;
|
||||
}
|
||||
|
||||
return return_val;
|
||||
|
||||
}
|
||||
|
||||
#ifdef UDHCP_DEBUG
|
||||
/* Print out static leases just to check what's going on */
|
||||
/* Takes the address of the pointer to the static_leases linked list */
|
||||
void printStaticLeases(struct static_lease **arg)
|
||||
{
|
||||
/* Get a pointer to the linked list */
|
||||
struct static_lease *cur = *arg;
|
||||
|
||||
while(cur != NULL)
|
||||
{
|
||||
/* printf("PrintStaticLeases: Lease mac Address: %x\n", cur->mac); */
|
||||
printf("PrintStaticLeases: Lease mac Value: %x\n", *(cur->mac));
|
||||
/* printf("PrintStaticLeases: Lease ip Address: %x\n", cur->ip); */
|
||||
printf("PrintStaticLeases: Lease ip Value: %x\n", *(cur->ip));
|
||||
|
||||
cur = cur->next;
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
|
|
@ -1,25 +0,0 @@
|
|||
/* static_leases.h */
|
||||
#ifndef _STATIC_LEASES_H
|
||||
#define _STATIC_LEASES_H
|
||||
|
||||
#include "dhcpd.h"
|
||||
|
||||
/* Config file will pass static lease info to this function which will add it
|
||||
* to a data structure that can be searched later */
|
||||
int addStaticLease(struct static_lease **lease_struct, uint8_t *mac, uint32_t *ip);
|
||||
|
||||
/* Check to see if a mac has an associated static lease */
|
||||
uint32_t getIpByMac(struct static_lease *lease_struct, void *arg);
|
||||
|
||||
/* Check to see if an ip is reserved as a static ip */
|
||||
uint32_t reservedIp(struct static_lease *lease_struct, uint32_t ip);
|
||||
|
||||
#ifdef UDHCP_DEBUG
|
||||
/* Print out static leases just to check what's going on */
|
||||
void printStaticLeases(struct static_lease **lease_struct);
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
|
|
@ -1,6 +0,0 @@
|
|||
#ifndef _UDHCP_VERSION_H
|
||||
#define _UDHCP_VERSION_H
|
||||
|
||||
#define VERSION "0.9.9-pre"
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue