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Release 4.11 drivers/net/wireless/marvell/mwifiex/sta_rx.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; }

Contributors

PersonTokensPropCommitsCommitProp
Avinash Patil20998.58%150.00%
Bing Zhao31.42%150.00%
Total212100.00%2100.00%

/* * 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); } 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, priv->rxpd_rate, priv->rxpd_htinfo); 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; }

Contributors

PersonTokensPropCommitsCommitProp
Bing Zhao25754.91%220.00%
Avinash Patil10722.86%330.00%
Xinming Hu5311.32%110.00%
Amitkumar Karwar459.62%330.00%
Zhaoyang Liu61.28%110.00%
Total468100.00%10100.00%

/* * 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) 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; }

Contributors

PersonTokensPropCommitsCommitProp
Bing Zhao25055.68%110.00%
Avinash Patil11826.28%330.00%
Amitkumar Karwar398.69%220.00%
Stone Piao306.68%110.00%
Zhaoyang Liu51.11%110.00%
Yogesh Ashok Powar51.11%110.00%
Ding Tianhong20.45%110.00%
Total449100.00%10100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Bing Zhao53345.95%211.76%
Avinash Patil44138.02%529.41%
Amitkumar Karwar847.24%423.53%
Xinming Hu544.66%211.76%
Stone Piao302.59%15.88%
Zhaoyang Liu110.95%15.88%
Yogesh Ashok Powar50.43%15.88%
Ding Tianhong20.17%15.88%
Total1160100.00%17100.00%
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