Re: [lime-dev] dhcpdiscover

Mando algo que me habia quedado colgado en el outbox, una forma simple de chequear dhcp servers con udhcpc On 07/14/2013 03:34 PM, Gioacchino Mazzurco wrote: (08:20:49 PM) mrkiko: the problem is ethernet - how is it possible to check if ethernet connectivity is actually available in an event-based way? So, since ifup implies ifdown and then ifup, I was thinking to try to ifup the interface and verify with ifstatus if things gone well (08:21:26 PM) jow_laptop: you want to chack ethernet availability without actually bring the interface up? like a dry-run? (08:21:31 PM) jow_laptop: s/chack/check/ (08:21:52 PM) mrkiko: yes (08:21:56 PM) mrkiko: exactly that (08:22:36 PM) mrkiko: I might also manage to do it by hand - with the ip command and ping... but I would not be so happy :) (08:22:38 PM) jow_laptop: udhcpc -n -q -s /bin/true -t 1 -i eth1 (08:22:56 PM) mrkiko: ah (08:23:23 PM) mrkiko: yeah - you changed my day - for the second time (08:23:32 PM) jow_laptop: the trick is to invoke udhcpc with a dummy script (/bin/true) that does simply nothing with the received lease (08:23:43 PM) mrkiko: I looked ad udhcp help various times without noticing (08:25:08 PM) jow_laptop: you might need to ifconfig eth1 up / ip link set dev eth1 up before calling udhcpc (08:25:13 PM) jow_laptop: not sure if it does it by itself (08:25:48 PM) mrkiko: Infact I need to do so (08:25:52 PM) mrkiko: and I will :) (08:25:56 PM) jow_laptop: also a larger timeout etc. (08:26:04 PM) jow_laptop: not any dhcp server might be that fast