Public bug reported: Binary package hint: linux-source-2.6.20
UDP packets checksum is wrong with my card: [EMAIL PROTECTED]:~$ lspci | grep Marvell 02:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8053 PCI-E Gigabit Ethernet Controller (rev 15) I discovered this bug trying to set up a DHCP server for my LAN, UDP packets got dropped by the client because their checksum was wrong. This is due to checksum offloading, if i disable it using: sudo ethtool -K eth0 rx on tx off everything works, if I re-enable it on tx then i'm unable to get an IP. This only seems to affet UDP packets, for tcp packet everything works fine. This is a similar bug: https://bugs.launchpad.net/ubuntu/+source/libpcap/+bug/31273 it is normal that packets get captured with wrong checksum, cause the checksum will be added by the card, however some cards (like mine) send a wrong checksum on wire. Driver: [EMAIL PROTECTED]:~$ sudo ethtool -i eth0 driver: sky2 version: 1.13 firmware-version: N/A bus-info: 0000:02:00.0 Output of ethtool -k: [EMAIL PROTECTED]:~$ sudo ethtool -k eth0 Offload parameters for eth0: Cannot get device udp large send offload settings: Operation not supported rx-checksumming: on tx-checksumming: on scatter-gather: on tcp segmentation offload: on udp fragmentation offload: off generic segmentation offload: off (Notice "Cannot get device udp ....") [EMAIL PROTECTED]:~$ uname -a Linux steven-desktop 2.6.20-16-generic #2 SMP Thu Jun 7 20:19:32 UTC 2007 i686 GNU/Linux (Credit to dnsmasq team for help) ** Affects: linux-source-2.6.20 (Ubuntu) Importance: Undecided Status: New -- Wrong UDP Packets Checksum https://bugs.launchpad.net/bugs/127749 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
