Commit Graph

17 Commits

Author SHA1 Message Date
Alan Somers
79a1d19516 dhclient: raise WARNS to 4
Mostly const-correctness fixes. There were also some variable-shadowing,
unused variable, and a couple of sockaddr type-correctness changes. I also had
trouble with cast-align warnings. I was able to prove that one of them was a
false positive. But ultimately I had to disable the warning program-wide to
deal with the others.

Reviewed by:	cem
MFC after:	3 weeks
Sponsored by:	Spectra Logic Corp
Differential Revision:	https://reviews.freebsd.org/D14460
2018-02-21 21:13:08 +00:00
Alan Somers
afe6f8358e dhclient(8): raise WARNS to 3
Mostly had to fix a lot of signed/unsigned comparison warnings

MFC after:	3 weeks
Sponsored by:	Spectra Logic Corp
2017-12-14 15:41:32 +00:00
Pedro F. Giffuni
8a16b7a18f General further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:49:47 +00:00
Mariusz Zaborski
cb003dd918 Use syslog service in dhclient(8).
dhclient(8) is failing during boot to connect to the syslog service, because
syslog daemon is started after dhclient(8). This can be reproduced by stooping
syslog daemon and ktrace the dhclient or use kern.trap_enotcap sysctl and boot
the machine. Using the Casper syslog service fix the problem.

Reviewed by:	bapt@
Differential Revision:	https://reviews.freebsd.org/D12825
2017-11-12 08:42:43 +00:00
Conrad Meyer
387016a576 dhclient: add support for interface-mtu (26)
Make dhclient set interface MTU if it was provided.

This version implements MTU setting in dhclient itself before it runs
dhclient-script.

PR:		206721
Submitted by:	novel@
Reported by:	Jarrod Petz <jlpetz at gmail.com>
Reviewed by:	cem, allanjude
Differential Revision:	https://reviews.freebsd.org/D5675
2016-09-02 21:14:29 +00:00
Pawel Jakub Dawidek
235eb53002 MFp4 @229481:
Currently it was allowed to send any UDP packets from unprivileged process and
possibly any packets because /dev/bpf was open for writing.

Move sending packets to privileged process. Unprivileged process has no longer
access to not connected UDP socket and has only access to /dev/bpf in read-only
mode.

Reviewed by:	brooks
Sponsored by:	The FreeBSD Foundation
2013-07-03 22:12:54 +00:00
Pawel Jakub Dawidek
b0f1b32afb MFp4 @229476,229478:
Make use of two fields: rfdesc and wfdesc to keep bpf descriptor open for
reading only in rfdesc and bpf descriptor open for writing only in wfdesc.
In the end they will be used by two different processes.

Reviewed by:	brooks
Sponsored by:	The FreeBSD Foundation
2013-07-03 22:01:52 +00:00
Pawel Jakub Dawidek
e8da500388 MFp4 @229473:
No caller checks send_packet() return value, so make it void.

Reviewed by:	brooks
Sponsored by:	The FreeBSD Foundation
2013-07-03 21:57:24 +00:00
Pawel Jakub Dawidek
ba019ae51f MFp4 @229472:
Use the same type for 'from' and 'to' argument in send_packet().

Reviewed by:	brooks
Sponsored by:	The FreeBSD Foundation
2013-07-03 21:53:54 +00:00
Pawel Jakub Dawidek
d1f4d85494 MFp4 @229471:
Remove unused argument from assemble_hw_header().

Reviewed by:	brooks
Sponsored by:	The FreeBSD Foundation
2013-07-03 21:49:10 +00:00
Pawel Jakub Dawidek
592291c1e7 MFp4 @229470:
Remove unused argument from send_packet().

Reviewed by:	brooks
Sponsored by:	The FreeBSD Foundation
2013-07-03 21:45:29 +00:00
Pawel Jakub Dawidek
181ab08d9e MFp4: @229469:
Garbage-collect dead prototypes.

Reviewed by:	brooks
Sponsored by:	The FreeBSD Foundation
2013-07-03 21:41:35 +00:00
Bruce M Simpson
d32438c3f1 When acquiring a lease, record the value of the BOOTP siaddr field
contained in the DHCP offer, and write it out to the lease file
as an unquoted value of the "next-server" keyword. The value is ignored
when the lease is read back by dhclient, however other applications
are free to parse it.

The intent behind this change is to allow easier interoperability
with automated installation systems e.g. Cobbler, Foreman, Razor;
FreeBSD installation kernels can automatically probe the network
to discover deployment servers.  There are no plans to MFC this
change unless a backport is specifically requested.

The syntax of the "next-server <ip>" lease keyword is intended to be
identical to that used by the ISC DHCPD server in its configuration files.
The required defines are already present in dhclient but were unused before
this change. (Note: This is NOT the same as Option 66, tftp-server-name).

It has been exercised in a university protocol testbed environment, with
Cobbler and an mfsBSD image containing pc-sysinstall (driven by Cobbler
Cheetah templates). The SYSLINUX memdisk driver is used to boot mfsBSD.
Currently this approach requires that a dedicated system profile has
been created for the node where FreeBSD is to be deployed. If this
is not present, the pc-sysinstall wrapper will be unable to obtain
a node configuration. There is code in progress to allow mfsBSD images
to obtain the required hints from the memdisk environment by parsing
the MBFT ACPI chunk.  This is non-standard as it is not linked into
the platform's ACPI RSDT.

Reviewed by:	des
2013-07-02 13:24:37 +00:00
John Baldwin
0a26f85822 Revert r239356 and use an alternate algorithm.
First, don't exit when the link goes down on an interface.  Instead,
teach dhclient to track changes in link state and to enter the reboot
state when the link on an interface goes up causing dhclient to attempt
to renew its existing lease.

Second, remove the change I added to clear the old lease when dhclient
exits due to an error (such as ifconfig down).  If an interface is
using autoconfiguration it should keep its autoconfiguration as much as
possible.  If the next time it needs a configuration it is able to reuse
the previous autoconfiguration, then leaving the settings intact allows
existing connections to survive temporary outages, etc.

PR:		bin/166656
MFC after:	1 month
2012-08-22 13:53:37 +00:00
Dag-Erling Smørgrav
23f39c906b Make dhclient use a pid file. Modify the rc script accordingly; while
there, clean it up and add some error checks.

Glanced at by:	brooks@
MFC after:	3 weeks
2011-10-13 17:20:45 +00:00
Philip Paeps
9b683f8da6 Make dhclient use bootpc (68) as the source port for unicast DHCPREQUEST
packets instead of allowing the protocol stack to pick a random source port.

This fixes the behaviour where dhclient would never transition from RENEWING
to BOUND without going through REBINDING in networks which are paranoid about
DHCP spoofing, such as most mainstream cable-broadband ISP networks.

Reviewed by:	brooks
Obtained from:	OpenBSD (partly - I'm not convinced their solution can work)
MFC after:	1 week (pending re approval)
2009-10-21 23:50:35 +00:00
Brooks Davis
47c0859616 Import the OpenBSD dhclient as shipped with OpenBSD-3.7 (the tag
OPENBSD_3_7).
2005-06-07 04:05:09 +00:00