Cyrille Pitchen 924ec53c41 net/macb: add RX checksum offload feature ... When RX checksum offload is enabled at GEM level (bit 24 set in the Network Control Register), frames with invalid IP, TCP or UDP checksums are discarted even if promiscuous mode is enabled (bit 4 set in the Network Control Register). This was verified with a simple userspace program, which corrupts UDP checksum using libnetfilter_queue. Then both IFF_PROMISC bit must be clear in dev->flags and NETIF_F_RXCSUM bit must be set in dev->features to enable RX checksum offload at GEM level. This way tcpdump is still able to capture corrupted frames. Also skb->ip_summed is set to CHECKSUM_UNNECESSARY only when both TCP/IP or UDP/IP checksums were verified by the GEM. Indeed the GEM may verify only IP checksum but not the one for ICMP (or other protocol than TCP or UDP). Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-07-24 23:39:55 -07:00
..
at91_ether.c	net/at91_ether: avoid NULL pointer dereference	2014-04-07 15:10:17 -04:00
Kconfig	net: cadence: Fix architecture dependencies	2014-04-24 13:23:37 -04:00
macb.c	net/macb: add RX checksum offload feature	2014-07-24 23:39:55 -07:00
macb.h	net/macb: add RX checksum offload feature	2014-07-24 23:39:55 -07:00
Makefile	net/at91_ether: select MACB in Kconfig	2012-10-23 02:40:09 -04:00