272 lines
8.7 KiB
C
272 lines
8.7 KiB
C
|
/*
|
||
|
|
* Marvell Wireless LAN device driver: station RX data handling
|
||
|
|
*
|
||
|
|
* Copyright (C) 2011-2014, Marvell International Ltd.
|
||
|
|
*
|
||
|
|
* This software file (the "File") is distributed by Marvell International
|
||
|
|
* Ltd. under the terms of the GNU General Public License Version 2, June 1991
|
||
|
|
* (the "License"). You may use, redistribute and/or modify this File in
|
||
|
|
* accordance with the terms and conditions of the License, a copy of which
|
||
|
|
* is available by writing to the Free Software Foundation, Inc.,
|
||
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
|
||
|
|
* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
|
||
|
|
*
|
||
|
|
* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
|
||
|
|
* this warranty disclaimer.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <uapi/linux/ipv6.h>
|
||
|
|
#include <net/ndisc.h>
|
||
|
|
#include "decl.h"
|
||
|
|
#include "ioctl.h"
|
||
|
|
#include "util.h"
|
||
|
|
#include "fw.h"
|
||
|
|
#include "main.h"
|
||
|
|
#include "11n_aggr.h"
|
||
|
|
#include "11n_rxreorder.h"
|
||
|
|
|
||
|
|
/* This function checks if a frame is IPv4 ARP or IPv6 Neighbour advertisement
|
||
|
|
* frame. If frame has both source and destination mac address as same, this
|
||
|
|
* function drops such gratuitous frames.
|
||
|
|
*/
|
||
|
|
static bool
|
||
|
|
mwifiex_discard_gratuitous_arp(struct mwifiex_private *priv,
|
||
|
|
struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
const struct mwifiex_arp_eth_header *arp;
|
||
|
|
struct ethhdr *eth;
|
||
|
|
struct ipv6hdr *ipv6;
|
||
|
|
struct icmp6hdr *icmpv6;
|
||
|
|
|
||
|
|
eth = (struct ethhdr *)skb->data;
|
||
|
|
switch (ntohs(eth->h_proto)) {
|
||
|
|
case ETH_P_ARP:
|
||
|
|
arp = (void *)(skb->data + sizeof(struct ethhdr));
|
||
|
|
if (arp->hdr.ar_op == htons(ARPOP_REPLY) ||
|
||
|
|
arp->hdr.ar_op == htons(ARPOP_REQUEST)) {
|
||
|
|
if (!memcmp(arp->ar_sip, arp->ar_tip, 4))
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case ETH_P_IPV6:
|
||
|
|
ipv6 = (void *)(skb->data + sizeof(struct ethhdr));
|
||
|
|
icmpv6 = (void *)(skb->data + sizeof(struct ethhdr) +
|
||
|
|
sizeof(struct ipv6hdr));
|
||
|
|
if (NDISC_NEIGHBOUR_ADVERTISEMENT == icmpv6->icmp6_type) {
|
||
|
|
if (!memcmp(&ipv6->saddr, &ipv6->daddr,
|
||
|
|
sizeof(struct in6_addr)))
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This function processes the received packet and forwards it
|
||
|
|
* to kernel/upper layer.
|
||
|
|
*
|
||
|
|
* This function parses through the received packet and determines
|
||
|
|
* if it is a debug packet or normal packet.
|
||
|
|
*
|
||
|
|
* For non-debug packets, the function chops off unnecessary leading
|
||
|
|
* header bytes, reconstructs the packet as an ethernet frame or
|
||
|
|
* 802.2/llc/snap frame as required, and sends it to kernel/upper layer.
|
||
|
|
*
|
||
|
|
* The completion callback is called after processing in complete.
|
||
|
|
*/
|
||
|
|
int mwifiex_process_rx_packet(struct mwifiex_private *priv,
|
||
|
|
struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
struct rx_packet_hdr *rx_pkt_hdr;
|
||
|
|
struct rxpd *local_rx_pd;
|
||
|
|
int hdr_chop;
|
||
|
|
struct ethhdr *eth;
|
||
|
|
u16 rx_pkt_off, rx_pkt_len;
|
||
|
|
u8 *offset;
|
||
|
|
u8 adj_rx_rate = 0;
|
||
|
|
|
||
|
|
local_rx_pd = (struct rxpd *) (skb->data);
|
||
|
|
|
||
|
|
rx_pkt_off = le16_to_cpu(local_rx_pd->rx_pkt_offset);
|
||
|
|
rx_pkt_len = le16_to_cpu(local_rx_pd->rx_pkt_length);
|
||
|
|
rx_pkt_hdr = (void *)local_rx_pd + rx_pkt_off;
|
||
|
|
|
||
|
|
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
|
||
|
|
* (ethertype).
|
||
|
|
* The firmware only passes up SNAP frames converting
|
||
|
|
* all RX Data from 802.11 to 802.2/LLC/SNAP frames.
|
||
|
|
* To create the Ethernet II, just move the src, dst address
|
||
|
|
* right before the snap_type.
|
||
|
|
*/
|
||
|
|
eth = (struct ethhdr *)
|
||
|
|
((u8 *) &rx_pkt_hdr->eth803_hdr
|
||
|
|
+ sizeof(rx_pkt_hdr->eth803_hdr) +
|
||
|
|
sizeof(rx_pkt_hdr->rfc1042_hdr)
|
||
|
|
- sizeof(rx_pkt_hdr->eth803_hdr.h_dest)
|
||
|
|
- sizeof(rx_pkt_hdr->eth803_hdr.h_source)
|
||
|
|
- sizeof(rx_pkt_hdr->rfc1042_hdr.snap_type));
|
||
|
|
|
||
|
|
memcpy(eth->h_source, rx_pkt_hdr->eth803_hdr.h_source,
|
||
|
|
sizeof(eth->h_source));
|
||
|
|
memcpy(eth->h_dest, rx_pkt_hdr->eth803_hdr.h_dest,
|
||
|
|
sizeof(eth->h_dest));
|
||
|
|
|
||
|
|
/* Chop off the rxpd + the excess memory from the 802.2/llc/snap
|
||
|
|
header that was removed. */
|
||
|
|
hdr_chop = (u8 *) eth - (u8 *) local_rx_pd;
|
||
|
|
} else {
|
||
|
|
/* Chop off the rxpd */
|
||
|
|
hdr_chop = (u8 *) &rx_pkt_hdr->eth803_hdr -
|
||
|
|
(u8 *) local_rx_pd;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Chop off the leading header bytes so the it points to the start of
|
||
|
|
either the reconstructed EthII frame or the 802.2/llc/snap frame */
|
||
|
|
skb_pull(skb, hdr_chop);
|
||
|
|
|
||
|
|
if (priv->hs2_enabled &&
|
||
|
|
mwifiex_discard_gratuitous_arp(priv, skb)) {
|
||
|
|
mwifiex_dbg(priv->adapter, INFO, "Bypassed Gratuitous ARP\n");
|
||
|
|
dev_kfree_skb_any(skb);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
|
||
|
|
ntohs(rx_pkt_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {
|
||
|
|
offset = (u8 *)local_rx_pd + rx_pkt_off;
|
||
|
|
mwifiex_process_tdls_action_frame(priv, offset, rx_pkt_len);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Only stash RX bitrate for unicast packets. */
|
||
|
|
if (likely(!is_multicast_ether_addr(rx_pkt_hdr->eth803_hdr.h_dest))) {
|
||
|
|
priv->rxpd_rate = local_rx_pd->rx_rate;
|
||
|
|
priv->rxpd_htinfo = local_rx_pd->ht_info;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA ||
|
||
|
|
GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
|
||
|
|
adj_rx_rate = mwifiex_adjust_data_rate(priv,
|
||
|
|
local_rx_pd->rx_rate,
|
||
|
|
local_rx_pd->ht_info);
|
||
|
|
mwifiex_hist_data_add(priv, adj_rx_rate, local_rx_pd->snr,
|
||
|
|
local_rx_pd->nf);
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = mwifiex_recv_packet(priv, skb);
|
||
|
|
if (ret == -1)
|
||
|
|
mwifiex_dbg(priv->adapter, ERROR,
|
||
|
|
"recv packet failed\n");
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This function processes the received buffer.
|
||
|
|
*
|
||
|
|
* The function looks into the RxPD and performs sanity tests on the
|
||
|
|
* received buffer to ensure its a valid packet, before processing it
|
||
|
|
* further. If the packet is determined to be aggregated, it is
|
||
|
|
* de-aggregated accordingly. Non-unicast packets are sent directly to
|
||
|
|
* the kernel/upper layers. Unicast packets are handed over to the
|
||
|
|
* Rx reordering routine if 11n is enabled.
|
||
|
|
*
|
||
|
|
* The completion callback is called after processing in complete.
|
||
|
|
*/
|
||
|
|
int mwifiex_process_sta_rx_packet(struct mwifiex_private *priv,
|
||
|
|
struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
struct mwifiex_adapter *adapter = priv->adapter;
|
||
|
|
int ret = 0;
|
||
|
|
struct rxpd *local_rx_pd;
|
||
|
|
struct rx_packet_hdr *rx_pkt_hdr;
|
||
|
|
u8 ta[ETH_ALEN];
|
||
|
|
u16 rx_pkt_type, rx_pkt_offset, rx_pkt_length, seq_num;
|
||
|
|
struct mwifiex_sta_node *sta_ptr;
|
||
|
|
|
||
|
|
local_rx_pd = (struct rxpd *) (skb->data);
|
||
|
|
rx_pkt_type = le16_to_cpu(local_rx_pd->rx_pkt_type);
|
||
|
|
rx_pkt_offset = le16_to_cpu(local_rx_pd->rx_pkt_offset);
|
||
|
|
rx_pkt_length = le16_to_cpu(local_rx_pd->rx_pkt_length);
|
||
|
|
seq_num = le16_to_cpu(local_rx_pd->seq_num);
|
||
|
|
|
||
|
|
rx_pkt_hdr = (void *)local_rx_pd + rx_pkt_offset;
|
||
|
|
|
||
|
|
if ((rx_pkt_offset + rx_pkt_length) > (u16) skb->len) {
|
||
|
|
mwifiex_dbg(adapter, ERROR,
|
||
|
|
"wrong rx packet: len=%d, rx_pkt_offset=%d, rx_pkt_length=%d\n",
|
||
|
|
skb->len, rx_pkt_offset, rx_pkt_length);
|
||
|
|
priv->stats.rx_dropped++;
|
||
|
|
dev_kfree_skb_any(skb);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (rx_pkt_type == PKT_TYPE_MGMT) {
|
||
|
|
ret = mwifiex_process_mgmt_packet(priv, skb);
|
||
|
|
if (ret)
|
||
|
|
mwifiex_dbg(adapter, DATA, "Rx of mgmt packet failed");
|
||
|
|
dev_kfree_skb_any(skb);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If the packet is not an unicast packet then send the packet
|
||
|
|
* directly to os. Don't pass thru rx reordering
|
||
|
|
*/
|
||
|
|
if ((!IS_11N_ENABLED(priv) &&
|
||
|
|
!(ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
|
||
|
|
!(local_rx_pd->flags & MWIFIEX_RXPD_FLAGS_TDLS_PACKET))) ||
|
||
|
|
!ether_addr_equal_unaligned(priv->curr_addr, rx_pkt_hdr->eth803_hdr.h_dest)) {
|
||
|
|
mwifiex_process_rx_packet(priv, skb);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mwifiex_queuing_ra_based(priv) ||
|
||
|
|
(ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
|
||
|
|
local_rx_pd->flags & MWIFIEX_RXPD_FLAGS_TDLS_PACKET)) {
|
||
|
|
memcpy(ta, rx_pkt_hdr->eth803_hdr.h_source, ETH_ALEN);
|
||
|
|
if (local_rx_pd->flags & MWIFIEX_RXPD_FLAGS_TDLS_PACKET &&
|
||
|
|
local_rx_pd->priority < MAX_NUM_TID) {
|
||
|
|
sta_ptr = mwifiex_get_sta_entry(priv, ta);
|
||
|
|
if (sta_ptr)
|
||
|
|
sta_ptr->rx_seq[local_rx_pd->priority] =
|
||
|
|
le16_to_cpu(local_rx_pd->seq_num);
|
||
|
|
mwifiex_auto_tdls_update_peer_signal(priv, ta,
|
||
|
|
local_rx_pd->snr,
|
||
|
|
local_rx_pd->nf);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if (rx_pkt_type != PKT_TYPE_BAR &&
|
||
|
|
local_rx_pd->priority < MAX_NUM_TID)
|
||
|
|
priv->rx_seq[local_rx_pd->priority] = seq_num;
|
||
|
|
memcpy(ta, priv->curr_bss_params.bss_descriptor.mac_address,
|
||
|
|
ETH_ALEN);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Reorder and send to OS */
|
||
|
|
ret = mwifiex_11n_rx_reorder_pkt(priv, seq_num, local_rx_pd->priority,
|
||
|
|
ta, (u8) rx_pkt_type, skb);
|
||
|
|
|
||
|
|
if (ret || (rx_pkt_type == PKT_TYPE_BAR))
|
||
|
|
dev_kfree_skb_any(skb);
|
||
|
|
|
||
|
|
if (ret)
|
||
|
|
priv->stats.rx_dropped++;
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|