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mwifiex: fix an issue with Appletalk devices

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SNAP/LLC header in the AARP packet is being stripped off while
preparing an EthernetII header.
Annex M, Table M.3 in 802.11 spec says that some header
(ex. AppleTalk AARP(2)) should pass through untouched.
This patch modifies the check to exclude/include EthernetII
header translation for special cases.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Amitkumar Karwar 2013-12-02 23:17:51 -08:00 committed by John W. Linville
parent 1bf947a791
commit c613d16fa7
2 changed files with 12 additions and 4 deletions
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8
drivers/net/wireless/mwifiex/sta_rx.c
View file

@ -94,8 +94,12 @@ int mwifiex_process_rx_packet(struct mwifiex_private *priv,
rx_pkt_hdr = (void *)local_rx_pd +
le16_to_cpu(local_rx_pd->rx_pkt_offset);
if (!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header,
sizeof(rfc1042_header))) {
if ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header,
sizeof(bridge_tunnel_header))) ||
(!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header,
sizeof(rfc1042_header)) &&
ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_AARP &&
ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_IPX)) {
/*
* Replace the 803 header and rfc1042 header (llc/snap) with an
* EthernetII header, keep the src/dst and snap_type

8
drivers/net/wireless/mwifiex/uap_txrx.c
View file

@ -111,8 +111,12 @@ static void mwifiex_uap_queue_bridged_pkt(struct mwifiex_private *priv,
return;
}
if (!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header,
sizeof(rfc1042_header))) {
if ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header,
sizeof(bridge_tunnel_header))) ||
(!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header,
sizeof(rfc1042_header)) &&
ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_AARP &&
ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_IPX)) {
/* Replace the 803 header and rfc1042 header (llc/snap) with
* an Ethernet II header, keep the src/dst and snap_type
* (ethertype).