Re: Problems with axe(4) and checksum offloading

From: Spil Oss <spil.oss_at_gmail.com>
Date: Sat, 13 Apr 2013 15:25:11 +0200
Hi YongHyeon,

Will post on freebsd-ipfw_at_ as well...

Does your engineering sample function normally with rxcsum/txcsum disabled?

Kind regards,

Spil.


On Thu, Apr 11, 2013 at 3:11 AM, YongHyeon PYUN <pyunyh_at_gmail.com> wrote:

> On Wed, Apr 10, 2013 at 07:48:00PM +0200, Spil Oss wrote:
> > Hi YongHyeon,
> >
> > With the original unmodified .ko...
> >
> > ifconfig output as requested at bottom
> >
> > Static IP-configuration does not make a difference with the ipfw
> behaviour.
> >
> > ipfw ruleset (based on /etc/rc.firewall simple ruleset)
> > 00010 allow ip from any to me dst-port 22 recv ue0
> > 00010 allow tcp from me 22 to any xmit ue0
> > 00100 allow ip from any to any via lo0
> > 00200 deny ip from any to 127.0.0.0/8
> > 00300 deny ip from 127.0.0.0/8 to any
> > 00400 deny ip from any to ::1
> > 00500 deny ip from ::1 to any
> > 00600 allow ipv6-icmp from :: to ff02::/16
> > 00700 allow ipv6-icmp from fe80::/10 to fe80::/10
> > 00800 allow ipv6-icmp from fe80::/10 to ff02::/16
> > 00900 allow ipv6-icmp from any to any ip6 icmp6types 1
> > 01000 allow ipv6-icmp from any to any ip6 icmp6types 2,135,136
> > 01100 deny ip from 10.16.2.1 to any in via ue0
> > 01200 deny ip from 172.17.2.111 to any in via re0
> > 01300 deny ip from any to 10.0.0.0/8 via ue0
> > 01500 deny ip from any to 192.168.0.0/16 via ue0
> > 01600 deny ip from any to 0.0.0.0/8 via ue0
> > 01700 deny ip from any to 169.254.0.0/16 via ue0
> > 01800 deny ip from any to 192.0.2.0/24 via ue0
> > 01900 deny ip from any to 224.0.0.0/4 via ue0
> > 02000 deny ip from any to 240.0.0.0/4 via ue0
> > 02100 divert 8668 ip4 from any to any via ue0
> > 02200 deny ip from 10.0.0.0/8 to any via ue0
> > 02400 deny ip from 192.168.0.0/16 to any via ue0
> > 02500 deny ip from 0.0.0.0/8 to any via ue0
> > 02600 deny ip from 169.254.0.0/16 to any via ue0
> > 02700 deny ip from 192.0.2.0/24 to any via ue0
> > 02800 deny ip from 224.0.0.0/4 to any via ue0
> > 02900 deny ip from 240.0.0.0/4 to any via ue0
> > 03000 allow tcp from any to any established
> > 03100 allow ip from any to any frag
> > 03200 allow tcp from any to me dst-port 22 setup
> > 03300 allow tcp from any to me dst-port 25 setup
> > 03400 allow tcp from any to me dst-port 465 setup
> > 03500 allow tcp from any to me dst-port 587 setup
> > 03600 allow tcp from any to me dst-port 80 setup
> > 03700 allow tcp from any to me dst-port 443 setup
> > 03800 deny log logamount 5 ip4 from any to any in via ue0 setup proto tcp
> > 03900 allow tcp from any to any setup
> > 04000 allow udp from me to any dst-port 53 keep-state
> > 04100 allow udp from me to any dst-port 123 keep-state
> > 04200 allow ip from any to any dst-port 22 recv ue0
> > 65535 deny ip from any to any
> >
> > If I remove rule 10 it will NOT work with ue0, the ruleset without rule
> 10
> > DOES work with re0.
> >
> > Found an older PR about em or fxp having trouble with natd when
> > rxcsum/txcsum was enabled, that is why I started fiddling with
> > rxcsum/txcsum and found that the NIC would be unusable without
> > rxcsum/txcsum enabled. If only I could find that PR now
> (kern/170081???)...
> > Was fixed in base...
>
> If you don't use ipfw/natd, checksum offloading of axe(4) work?
> If yes, you'd get better answer from ipfw mailing list.
>
> >
> > Some other post reported fake AX88772A chips (32-pin packaging vs 64 in
> the
> > original) on cheap USB NICs so I checked the hardware as well and could
> not
>
> AX88772A does not support TX/RX checksum offloading.
>
> > see an issue (64-pin packaging).
> >
> > # ifconfig ue0
> > ue0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
> >         options=8000b<RXCSUM,TXCSUM,VLAN_MTU,LINKSTATE>
> >         ether 00:60:6e:42:5b:53
> >         nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
> >         media: Ethernet autoselect (100baseTX <full-duplex>)
> >         status: active
> >
> > # dhclient ue0
> > DHCPDISCOVER on ue0 to 255.255.255.255 port 67 interval 4
> > DHCPOFFER from 172.17.2.1
> > DHCPREQUEST on ue0 to 255.255.255.255 port 67
> > DHCPACK from 172.17.2.1
> > bound to 172.17.2.111 -- renewal in 43200 seconds.
> >
> > # ifconfig ue0
> > ue0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
> >         options=8000b<RXCSUM,TXCSUM,VLAN_MTU,LINKSTATE>
> >         ether 00:60:6e:42:5b:53
> >         inet6 fe80::260:6eff:fe42:5b53%ue0 prefixlen 64 scopeid 0x7
> >         inet 172.17.2.111 netmask 0xffffff00 broadcast 172.17.2.255
> >         nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
> >         media: Ethernet autoselect (100baseTX <full-duplex>)
> >         status: active
>
> I can see TX/RX checksum offloading is active and it successfully
> got a IP address via DHCP.
>
> >
> >
> >
> >
> > On Wed, Apr 10, 2013 at 4:14 AM, YongHyeon PYUN <pyunyh_at_gmail.com>
> wrote:
> >
> > > On Mon, Apr 08, 2013 at 08:45:58PM +0200, Spil Oss wrote:
> > > > Hi YongHyeon,
> > > >
> > > > output from verbose boot
> > > >
> > > > ugen3.2: <vendor 0x0b95> at usbus3
> > > > axe0: <vendor 0x0b95 product 0x772b, rev 2.00/0.01, addr 2> on usbus3
> > > > axe0: PHYADDR 0xe0:0x10
> > > > miibus1: <MII bus> on axe0
> > > > ukphy0: <Generic IEEE 802.3u media interface> PHY 16 on miibus1
> > > > ukphy0: OUI 0x007063, model 0x0008, rev. 1
> > > > ukphy0:  none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto,
> > > > auto-flow
> > > > ue0: <USB Ethernet> on axe0
> > > > ue0: bpf attached
> > > > ue0: Ethernet address: 00:60:6e:42:5b:53
> > > > ue0: link state changed to UP
> > > > ue0: link state changed to DOWN
> > > > ue0: link state changed to UP
> > >
> > > AX88772B engineering sample I have still worked on latest current.
> > > Could you use a static IP rather than using DHCP and see whether
> > > that makes any difference?(Note, you have to revert your changes
> > > made to axe(4) before trying that).
> > >
> > > Also show me the output of 'ifconfig ue0' before/after running
> > > dhclient(8).
> > >
> > > >
> > > > Apart from what I originally described...
> > > > Networking does work, but not when packets pass through ipfw and
> nat. If
> > > I
> > > > add my ipfw rules before the divert natd rule networking works as
> > > expected,
> > > > without the SYN,ACK response packets are not accepted if I e.g.
> connect
> > > to
> > > > something on the axe interface. I have validated the ipfw ruleset
> with
> > > the
> > > > onboard realtek NIC and it then works as expected.
> > > >
> > > > # usbconfig -u 3 -a 2 dump_info
> > > > ugen3.2: <product 0x772b vendor 0x0b95> at usbus3, cfg=0 md=HOST
> spd=HIGH
> > > > (480Mbps) pwr=ON (200mA)
> > > >
> > > > Kind regards,
> > > >
> > > > Spil.
> > > >
> > > >
> > > > On Mon, Apr 8, 2013 at 8:35 AM, YongHyeon PYUN <pyunyh_at_gmail.com>
> wrote:
> > > >
> > > > > On Sun, Apr 07, 2013 at 09:14:16PM +0200, Spil Oss wrote:
> > > > > > Hi all,
> > > > > >
> > > > > > With checksum offloading enabled I cannot use my axe NIC (ASIX
> > > AX88772B).
> > > > > >
> > > > > > ifconfig ue0 -txcsum -rxcsum
> > > > > > will make dhclient ue0 return
> > > > > >
> > > > > > if I re-enable txcsum and rxcsum I get an immediate response
> from the
> > > > > dhcp
> > > > > > server.
> > > > > >
> > > > > > Tried to remove the csum features by commenting out
> > > > > > ifp->if_capabilities |= IFCAP_TXCSUM | IFCAP_RXCSUM;
> > > > > > ifp->if_hwassist = AXE_CSUM_FEATURES;
> > > > > > (lines 855 and 856 in /usr/src/sys/dev/usb/net/if_axe.c)
> > > > > > and rebuild the module. This does remove RXCSUM and TXCSUM from
> > > options
> > > > > and
> > > > > > behaves the same as disabling the features with ifconfig (i.e.
> does
> > > not
> > > > > > work)
> > > > > >
> > > > > > 10.0-CURRENT r248351
> > > > > >
> > > > > > Hope someone can help me... Spil.
> > > > >
> > > > > Last time I tried, checksum offloading worked as expected.
> > > > > Would you show me the verbose dmesg output after attaching the
> > > > > axe(4) NIC?
> > > > >
> > >
>
Received on Sat Apr 13 2013 - 11:25:12 UTC

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