A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 19:21:31 -04:00
Code Issues Projects Releases Packages Wiki Activity

net: l2tp: fix reversed udp6 checksum flags

Browse source 
This patch fixes a bug which causes the behavior of whether to ignore
udp6 checksum of udp6 encapsulated l2tp tunnel contrary to what
userspace program requests.

When the flag `L2TP_ATTR_UDP_ZERO_CSUM6_RX` is set by userspace, it is
expected that udp6 checksums of received packets of the l2tp tunnel
to create should be ignored. In `l2tp_netlink.c`:
`l2tp_nl_cmd_tunnel_create()`, `cfg.udp6_zero_rx_checksums` is set
according to the flag, and then passed to `l2tp_core.c`:
`l2tp_tunnel_create()` and then `l2tp_tunnel_sock_create()`. In
`l2tp_tunnel_sock_create()`, `udp_conf.use_udp6_rx_checksums` is set
the same to `cfg.udp6_zero_rx_checksums`. However, if we want the
checksum to be ignored, `udp_conf.use_udp6_rx_checksums` should be set
to `false`, i.e. be set to the contrary. Similarly, the same should be
done to `udp_conf.use_udp6_tx_checksums`.

Signed-off-by: Miao Wang <[email protected]>
Acked-by: James Chapman <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Wang Shanker 2016-04-29 01:29:43 +08:00 • committed by David S. Miller
commit 018f825858
1 changed files with 2 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

4
net/l2tp/l2tp_core.c
View file

@ -1376,9 +1376,9 @@ static int l2tp_tunnel_sock_create(struct net *net,
memcpy(&udp_conf.peer_ip6, cfg->peer_ip6,
sizeof(udp_conf.peer_ip6));
udp_conf.use_udp6_tx_checksums =
cfg->udp6_zero_tx_checksums;
! cfg->udp6_zero_tx_checksums;
udp_conf.use_udp6_rx_checksums =
cfg->udp6_zero_rx_checksums;
! cfg->udp6_zero_rx_checksums;
} else
#endif
{