The original DHCP specification includes a route option but it supports
only class-based routes. RFC3442 adds support for specifying the netmask
width for each static route. A variable length encoding is used to minimize
the size of this option.
PR: bin/99534
Submitted by: Andrey V. Elsukov <bu7cher@yandex.ru>
Reviewed by: brooks
/tmp may not be writeable yet when dhclient is first run via
/etc/rc.d/netif so using it may not work. Also, writing to a
predictable file in /tmp as root is a really bad idea since a malicious
user may be able to win a race and insert a symlink which will allow
them to cause any file to be overwritten. To solve these problems,
create the tempory file in /var/run which will exist this early and is
writable only by root.
Security: Local risk if users can cause dhclient to run on demand
(such as by unplugging and replugging the network cable).
entries from the interface rather than using ifconfig's delete command.
This preserves non-dhclient configured addresses (though they are wiped
out when dhclient is restarted).
MFC after: 1 week
renewal, or we lose link, be more forceful about clearing interface
state so another interface that connects to the same network has a
chance of working. This doesn't address attemping to connect to both at
once, but appears to allow unplugging from a wired interface and then
inserting a wireless card that associates with an AP bridged to the same
LAN.
serves no apparent purpose (we commented this out ages ago in the ISC
scripts) and cases problems with some ADSL setups.
Reported by: Rostislav Krasny <rosti dot bsd at gmail dot com>
