diff options
Diffstat (limited to 'drivers/net/wireless/mwifiex/sta_rx.c')
| -rw-r--r-- | drivers/net/wireless/mwifiex/sta_rx.c | 267 |
1 files changed, 0 insertions, 267 deletions
diff --git a/drivers/net/wireless/mwifiex/sta_rx.c b/drivers/net/wireless/mwifiex/sta_rx.c deleted file mode 100644 index d4d4cb1..0000000 --- a/drivers/net/wireless/mwifiex/sta_rx.c +++ /dev/null @@ -1,267 +0,0 @@ -/* - * 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); - } - - 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; -} - -/* - * 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, ERROR, "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; -} |
