+++ /dev/null
-udhcp server/client package
------------------------
-
-Russ Dill <Russ.Dill@asu.edu>
-Matthew Ramsay <matthewr@moreton.com.au>
-Chris Trew <christ@moreton.com.au>
-
-Other Credits:
---------------
-Moreton Bay (http://www.moretonbay.com/)
-Vladimir Oleynik <dzo@simtrea.ru> Size optimizations
-
-
+++ /dev/null
- GNU GENERAL PUBLIC LICENSE
- Version 2, June 1991
-
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.
- 675 Mass Ave, Cambridge, MA 02139, USA
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-The hypothetical commands `show w' and `show c' should show the appropriate
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-This General Public License does not permit incorporating your program into
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-Public License instead of this License.
+++ /dev/null
-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
-
+++ /dev/null
-#
-# 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
-
+++ /dev/null
-ifneq ($(wildcard ../../networking/Config.in),)
-include Makefile.busybox
-else
-include Makefile.udhcp
-endif
+++ /dev/null
-# 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)
-
+++ /dev/null
-# 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
+++ /dev/null
-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.
-
+++ /dev/null
-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.
-
+++ /dev/null
-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
-
+++ /dev/null
-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.
+++ /dev/null
-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
+++ /dev/null
-/*
- * 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;
-}
+++ /dev/null
-/*
- * 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
+++ /dev/null
-/* 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));
-
-}
+++ /dev/null
-#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
+++ /dev/null
-/*
- * 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;
-}
+++ /dev/null
-/* clientsocket.h */
-#ifndef _CLIENTSOCKET_H
-#define _CLIENTSOCKET_H
-
-int raw_socket(int ifindex);
-
-#endif
+++ /dev/null
-/* 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
-
+++ /dev/null
-/* 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
+++ /dev/null
-/* 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;
-}
+++ /dev/null
-/* 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
+++ /dev/null
-/* 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;
-}
-
+++ /dev/null
-/* 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
+++ /dev/null
-/* 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;
-}
+++ /dev/null
-/*
- * 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);
-}
+++ /dev/null
-/* 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
+++ /dev/null
-#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;
-}
+++ /dev/null
-/*
- * 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;
-}
+++ /dev/null
-/* 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
+++ /dev/null
-/* 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 */
+++ /dev/null
-/*
- * 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;
-}
+++ /dev/null
-/* 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
+++ /dev/null
-#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;
-}
+++ /dev/null
-#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
+++ /dev/null
-/* 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);
-}
-
-
-
-
+++ /dev/null
-/* 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);
-
+++ /dev/null
-/* 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);
- }
-}
+++ /dev/null
-#ifndef _SCRIPT_H
-#define _SCRIPT_H
-
-extern void run_script(struct dhcpMessage *packet, const char *name);
-
-#endif
+++ /dev/null
-/* 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);
-}
+++ /dev/null
-#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
+++ /dev/null
-/* 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;
-}
+++ /dev/null
-/* 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);
+++ /dev/null
-/*
- * 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;
-}
+++ /dev/null
-/* 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
+++ /dev/null
-/*
- * 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
-
-
-
+++ /dev/null
-/* 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
-
-
-
+++ /dev/null
-#ifndef _UDHCP_VERSION_H
-#define _UDHCP_VERSION_H
-
-#define VERSION "0.9.9-pre"
-
-#endif
projects / platform / upstream / busybox.git / commitdiff