udhcpd not starting

[Ruben Lagar]

I run it as root

I added that line in the right place

It still doesn't work. When you ask if af_packet is built in my kernel, do
you mean the option "Packet socket" under "Networking options"? I am not
sure what I should check...

Thank you!


2009/10/8 Denys Vlasenko <vda.linux at googlemail.com>

> On Thursday 08 October 2009 14:11, Ruben Lagar wrote:
> > Hello everybody,
> > I have successfully cross-compiled busybox for an arm processor. Now I am
> > trying to run udhcpd with a very basic config file
> >
> >
> > *start ** **10.0.1.100** *
> > *end** **10.0.1.120** *
> > *interface** **usb0** *
> > *max_leases** **21** *
> > *lease_file** **/etc/udhcpd.leases** *
> > *pidfile** **/etc/udhcpd.pid** *
> > *option** **subnet** **255.255.255.0*
> > *option** **domain** **local*
> > *option** **lease** **864000*
> >
> > But when I try to run it, I get an error:
> >
> > udhcpd (v1.14.1) started
> > *udhcpd: can't bind to interface usb0: Protocol not available*
> >
> > I have been Googling it, and it looks like some Kernel problem or
> similar,
> > but haven't found exactly what is going on.
> >
> > Has anyone get this error before? Is there any way around it?
>
> Here is where it comes from:
>
> int FAST_FUNC setsockopt_bindtodevice(int fd, const char *iface)
> {
>        int r;
>        struct ifreq ifr;
>        strncpy_IFNAMSIZ(ifr.ifr_name, iface);
>        /* NB: passing (iface, strlen(iface) + 1) does not work!
>         * (maybe it works on _some_ kernels, but not on 2.6.26)
>         * Actually, ifr_name is at offset 0, and in practice
>         * just giving char[IFNAMSIZ] instead of struct ifreq works too.
>         * But just in case it's not true on some obscure arch... */
>        r = setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr));
>        if (r)
>                bb_perror_msg("can't bind to interface %s", iface);
>        return r;
> }
>
> A few shots in the dark:
>
> (1) Is af_packet built (CONFIG_FILTER=y/m)? If it's a module (m, not y),
>    is it inserted?
> (2) Do you run udhcpd as root?
> (3) Try adding "memset(&ifr, 0, sizeof(ifr));" before strncpy_IFNAMSIZ.
>
> --
> vda
>
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