Re: pcap_findalldevs() failing on FreeBSD 7.2

[Abdelrazak Younes <younes.abdel () gmail com>]

Hello Aaron,

Aaron Turner wrote:
> I've got a user of tcpreplay having issues where his interfaces are
> not being returned via pcap_findalldevs() under FreeBSD 7.2 using
> libpcap 0.9.7.  I don't have much more information unfortunately, but
> I do know he has an "nVIDIA nForce 10/100/1000 Ethernet" NIC as well
> as the obvious loopback.
>
> I've confirmed he is running as root and the interface is up:
>
> nfe0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4>
>         ether 00:1e:8c:b1:de:91
>         inet 192.168.1.111 netmask 0xffffff00 broadcast 192.168.1.255
>         media: Ethernet autoselect (100baseTX <full-duplex,flag0,flag1>)
>         status: active
>
> Actually, none of his interfaces are being returned (nfe0, nfe1 and
> lo0).  I looked in the change log and don't see any mention of any
> improvements/fixes in pcap_finalldevs() since 0.9.7 so I figured I'd
> mention it.
>
> User has since switched to Linux which works fine, so more of a FYI
> then anything.

FWIW I noticed some problems with pcap_finalldevs() under Windows XP and 
Vista with Winpcap-4.1beta5.
Essentially pcap_findalldevs() can only be used once in an application. 
The second time, pcap_findalldevs() will find nothing.
Another problem that we noticed is that, sometimes, if you don't put 
some delay between the calls to pcap_compile() within pcap_finalldevs() 
it will crash...

Abdel.
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