tcpdump mailing list archives
Re: pcap_findalldevs() failing on FreeBSD 7.2
From: Aaron Turner <synfinatic () gmail com>
Date: Wed, 28 Oct 2009 09:50:18 -0700
On Wed, Oct 28, 2009 at 9:27 AM, Wesley Shields <wxs () freebsd org> wrote:
On Wed, Oct 28, 2009 at 10:57:33AM -0400, Wesley Shields wrote:On Tue, Oct 27, 2009 at 12:00:04PM -0700, Aaron Turner wrote:On Tue, Oct 27, 2009 at 11:55 AM, Jung-uk Kim <jkim () freebsd org> wrote:On Friday 25 September 2009 01:18 am, 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.It's working fine for me: %uname -mrs FreeBSD 9.0-CURRENT amd64 %tcpdump -D 1.re0 2.lo0 %tcpdump -c 10 -w /dev/null tcpdump: listening on re0, link-type EN10MB (Ethernet), capture size 96 bytes 10 packets captured 18 packets received by filter 0 packets dropped by kernel Note "tcpdump -D" is using pcap_findalldevs() as well: tcpdump.c: -------------------------------------------------- #ifdef HAVE_PCAP_FINDALLDEVS ? ?case 'D': ? ? ? ?if (pcap_findalldevs(&devpointer, ebuf) < 0) ? ? ? ? ? ?error("%s", ebuf); ? ? ? ?else { ? ? ? ? ? ?for (i = 0; devpointer != 0; i++) { ? ? ? ? ? ? ? ?printf("%d.%s", i+1, devpointer->name); ? ? ? ? ? ? ? ?if (devpointer->description != NULL) ? ? ? ? ? ? ? ? ? ?printf(" (%s)", devpointer->description); ? ? ? ? ? ? ? ?printf("\n"); ? ? ? ? ? ? ? ?devpointer = devpointer->next; ? ? ? ? ? ?} ? ? ? ?} ? ? ? ?return 0; -------------------------------------------------- Jung-uk KimI notice you're using FreeBSD 9.0... what version of libpcap? I wonder if this is a libpcap bug or something in FreeBSD?I have two machines with identical hardware. They both have an nfe and bge interface. I don't use the nfe one at all. wxs@syn wxs % uname -sr FreeBSD 7.1-RELEASE-p5 wxs@syn wxs % ifconfig -l bge0 fwe0 fwip0 nfe0 lo0 pflog0 wxs@syn wxs % ifconfig nfe0 nfe0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=10b<RXCSUM,TXCSUM,VLAN_MTU,TSO4> ether 00:e0:81:5b:6b:4f media: Ethernet autoselect (none) status: no carrier wxs@syn wxs % sudo tcpdump -D 1.bge0 2.lo0 wxs@syn wxs % sudo ifconfig nfe0 192.168.3.100/24 wxs@syn wxs % sudo tcpdump -D 1.bge0 2.nfe0 3.lo0 wxs@syn wxs % tcpdump -V tcpdump version 3.9.8 libpcap version 0.9.8 I get the same results on a 9-CURRENT machine. That is with tcpdump version 4.0.0 and libpcap version 1.0.0.Sorry if another one comes through but my first attempt at this message never made it through. nfe0 doesn't need to have an IP address, just be up. Maybe that is what is going on?
If you look back in my original post, you'll see that in that case at least, the interface was up, running (had link) and an IP address configured. -- Aaron Turner http://synfin.net/ http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix & Windows Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety. -- Benjamin Franklin "carpe diem quam minimum credula postero" - This is the tcpdump-workers list. Visit https://cod.sandelman.ca/ to unsubscribe.
Current thread:
- Re: pcap_findalldevs() failing on FreeBSD 7.2 Abdelrazak Younes (Oct 27)
- Re: pcap_findalldevs() failing on FreeBSD 7.2 Gianluca Varenni (Oct 27)
- <Possible follow-ups>
- Re: pcap_findalldevs() failing on FreeBSD 7.2 Jung-uk Kim (Oct 27)
- Re: pcap_findalldevs() failing on FreeBSD 7.2 Aaron Turner (Oct 27)
- Re: pcap_findalldevs() failing on FreeBSD 7.2 Wesley Shields (Oct 28)
- Re: pcap_findalldevs() failing on FreeBSD 7.2 Wesley Shields (Oct 28)
- Re: pcap_findalldevs() failing on FreeBSD 7.2 Aaron Turner (Oct 28)
- Re: pcap_findalldevs() failing on FreeBSD 7.2 Aaron Turner (Oct 27)