Some issues in examples/udhcp/simple.script
Rolf Eike Beer
eb at emlix.com
Wed Aug 14 07:50:19 UTC 2019
I have discovered some problems with examples/udhcp/simple.script. I know,
it's an example, and a simplified one. Most people will still just use it
because it works, so I would like to point out at least some things.
First, it does not really use ip. At least not if "command" does not exist.
Fair enough, I know I have ip, so I just deleted the checks and the ifconfig
This makes it do nothing. As I found out the culprit is this:
if command -v ip >/dev/null; then
ip addr flush dev $interface
ifconfig $interface 0.0.0.0
The difference between both cases is: ifconfig brings up the interface, ip
with this command does not. So if you are using ip this will just send DHCP
request to a network interface that has link down, which will not get you
Rolf Eike Beer, emlix GmbH, http://www.emlix.com
Fon +49 551 30664-0, Fax +49 551 30664-11
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