Can dhcpclient handle broadcasting ?

[Chaigneau, Nicolas]

OK, the answer is no. It fails because:

"If the socket protocol supports broadcast and the specified address is a broadcast address for the socket protocol, sendmsg() will fail if the SO_BROADCAST option is not set for the socket."


The socket set up by dhcpclient.c needs something like this :

int so_broadcast = 1;
status = setsockopt(sockfd,
    SOL_SOCKET, SO_BROADCAST,
    &so_broadcast, sizeof so_broadcast);



De : freeradius-users-bounces+nicolas.chaigneau=capgemini.com at lists.freeradius.org [mailto:freeradius-users-bounces+nicolas.chaigneau=capgemini.com at lists.freeradius.org] De la part de Chaigneau, Nicolas
Envoyé : mercredi 9 juillet 2014 09:54
À : freeradius-users at lists.freeradius.org
Objet : Can dhcpclient handle broadcasting ?

Hello,


I'm trying to use dhcpclient to test broadcasting of a DHCP Discover.

I am root so I can use source port 68.
I'm sending the packet to the broadcast address.

I get the following error (returned by sendmsg, called from "sendfromto"): "Permission denied".

Is it possible to use dhcpclient from FreeRADIUS in broadcast mode ?



Regards,
Nicolas.
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