linux/drivers/net/wireless/marvell/mwifiex/sta_rx.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * NXP Wireless LAN device driver: station RX data handling
 *
 * Copyright 2011-2020 NXP
 */

#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)
{ … }

/*
 * 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)
{ … }

/*
 * 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)
{ … }