Hi, It seems packet parsing in Linux implementation fails to analyze VLAN frames (on most recent Linux systems).
The implementation of 'odp_packet_parse' relies on frame's ethtype field to be either 0x8100 or 0x88A8 (i.e 802.1q and 802.1ad) for identification of vlan frames. Problem is, Linux carries packet's VLAN information out-of-band (in buffer's meta-data), and packet's data is stripped from the vlan header. This is done regardless of whether HW RX VLAN offload is enabled. (More precisely, if HW RX VLAN offload is disabled, software mimics its behavior. Rationale is probably to align implementation by having an invariant: VLAN info is always in meta-data). For AF_PACKET sockets, the way to get VLAN information in usermode is by reading PACKET_AUXDATA cmsg (in the recvmsg case), or by examining tp_status and tp_vlan_tci of the tpacket2_hdr (in the mmap case). Any plans this is going to be adderssed for linux-generic's 'odp_packet_parse'? Regards, Shmulik _______________________________________________ lng-odp mailing list lng-odp@lists.linaro.org http://lists.linaro.org/mailman/listinfo/lng-odp
