diff options
| author | Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> | 2018-01-07 11:36:38 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-01-08 13:58:49 -0500 |
| commit | 23c76eb74098902e41b0f2140d4bbc3af06a1547 (patch) | |
| tree | 8444b9313cf5c9206996f0a78e0fd73a1d61b9da /drivers | |
| parent | bbd21b247cb596a426a1df0ad7658f141f558f86 (diff) | |
| download | linux-23c76eb74098902e41b0f2140d4bbc3af06a1547.tar.bz2 | |
net: qualcomm: rmnet: Handle command packets with checksum trailer
When using the MAPv4 packet format in conjunction with MAP commands,
a dummy DL checksum trailer will be appended to the packet. Before
this packet is sent out as an ACK, the DL checksum trailer needs to be
removed.
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c index 51e604923ac1..6bc328fb88e1 100644 --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c @@ -58,11 +58,24 @@ static u8 rmnet_map_do_flow_control(struct sk_buff *skb, } static void rmnet_map_send_ack(struct sk_buff *skb, - unsigned char type) + unsigned char type, + struct rmnet_port *port) { struct rmnet_map_control_command *cmd; int xmit_status; + if (port->data_format & RMNET_INGRESS_FORMAT_MAP_CKSUMV4) { + if (skb->len < sizeof(struct rmnet_map_header) + + RMNET_MAP_GET_LENGTH(skb) + + sizeof(struct rmnet_map_dl_csum_trailer)) { + kfree_skb(skb); + return; + } + + skb_trim(skb, skb->len - + sizeof(struct rmnet_map_dl_csum_trailer)); + } + skb->protocol = htons(ETH_P_MAP); cmd = RMNET_MAP_GET_CMD_START(skb); @@ -100,5 +113,5 @@ void rmnet_map_command(struct sk_buff *skb, struct rmnet_port *port) break; } if (rc == RMNET_MAP_COMMAND_ACK) - rmnet_map_send_ack(skb, rc); + rmnet_map_send_ack(skb, rc, port); } |