rtl8188eu/os_dep/recv_linux.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2007 - 2011 Realtek Corporation. */

#define _RECV_OSDEP_C_

#include "../include/osdep_service.h"
#include "../include/drv_types.h"

#include "../include/wifi.h"
#include "../include/recv_osdep.h"

#include "../include/osdep_intf.h"
#include "../include/usb_ops.h"
#include <linux/version.h>

/* alloc os related resource in struct recv_buf */
int rtw_os_recvbuf_resource_alloc(struct adapter *padapter,
		struct recv_buf *precvbuf)
{
	int res = _SUCCESS;

	precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL);
	if (!precvbuf->purb)
		res = _FAIL;
	precvbuf->pskb = NULL;
	precvbuf->reuse = false;
	return res;
}

/* free os related resource in struct recv_buf */
int rtw_os_recvbuf_resource_free(struct adapter *padapter,
				 struct recv_buf *precvbuf)
{
	usb_free_urb(precvbuf->purb);
	return _SUCCESS;
}

void rtw_handle_tkip_mic_err(struct adapter *padapter, u8 bgroup)
{
	union iwreq_data wrqu;
	struct iw_michaelmicfailure    ev;
	struct mlme_priv *pmlmepriv  = &padapter->mlmepriv;
	struct security_priv	*psecuritypriv = &padapter->securitypriv;
	u32 cur_time = 0;

	if (psecuritypriv->last_mic_err_time == 0) {
		psecuritypriv->last_mic_err_time = jiffies;
	} else {
		cur_time = jiffies;

		if (cur_time - psecuritypriv->last_mic_err_time < 60 * HZ) {
			psecuritypriv->btkip_countermeasure = true;
			psecuritypriv->last_mic_err_time = 0;
			psecuritypriv->btkip_countermeasure_time = cur_time;
		} else {
			psecuritypriv->last_mic_err_time = jiffies;
		}
	}

	memset(&ev, 0x00, sizeof(ev));
	if (bgroup)
		ev.flags |= IW_MICFAILURE_GROUP;
	else
		ev.flags |= IW_MICFAILURE_PAIRWISE;

	ev.src_addr.sa_family = ARPHRD_ETHER;
	memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
	memset(&wrqu, 0x00, sizeof(wrqu));
	wrqu.data.length = sizeof(ev);
	wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE,
			    &wrqu, (char *)&ev);
}

int rtw_recv_indicatepkt(struct adapter *padapter,
			 struct recv_frame *precv_frame)
{
	struct recv_priv *precvpriv;
	struct __queue *pfree_recv_queue;
	struct sk_buff *skb;
	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;

	precvpriv = &padapter->recvpriv;
	pfree_recv_queue = &precvpriv->free_recv_queue;

	skb = precv_frame->pkt;
	if (!skb)
		goto _recv_indicatepkt_drop;

	skb->data = precv_frame->rx_data;

	skb_set_tail_pointer(skb, precv_frame->len);

	skb->len = precv_frame->len;

	if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
		struct sk_buff *pskb2 = NULL;
		struct sta_info *psta = NULL;
		struct sta_priv *pstapriv = &padapter->stapriv;
		struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
		bool bmcast = is_multicast_ether_addr(pattrib->dst);

		if (memcmp(pattrib->dst, myid(&padapter->eeprompriv),
				 ETH_ALEN)) {
			if (bmcast) {
				psta = rtw_get_bcmc_stainfo(padapter);
				pskb2 = skb_clone(skb, GFP_ATOMIC);
			} else {
				psta = rtw_get_stainfo(pstapriv, pattrib->dst);
			}

			if (psta) {
				struct net_device *pnetdev;

				pnetdev = (struct net_device *)padapter->pnetdev;
				skb->dev = pnetdev;
				skb_set_queue_mapping(skb, rtw_recv_select_queue(skb));

				rtw_xmit_entry(skb, pnetdev);

				if (bmcast)
					skb = pskb2;
				else
					goto _recv_indicatepkt_end;
			}
		}
	}

	rcu_read_lock();
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
	rcu_dereference(padapter->pnetdev->rx_handler_data);
#else
	rcu_dereference(padapter->pnetdev->br_port);
#endif
	rcu_read_unlock();

	skb->ip_summed = CHECKSUM_NONE;
	skb->dev = padapter->pnetdev;
	skb->protocol = eth_type_trans(skb, padapter->pnetdev);

	netif_rx(skb);

_recv_indicatepkt_end:

	/*  pointers to NULL before rtw_free_recvframe() */
	precv_frame->pkt = NULL;

	rtw_free_recvframe(precv_frame, pfree_recv_queue);

	return _SUCCESS;

_recv_indicatepkt_drop:

	 /* enqueue back to free_recv_queue */
		rtw_free_recvframe(precv_frame, pfree_recv_queue);

	 return _FAIL;
}

#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
static void _rtw_reordering_ctrl_timeout_handler(void *func_context)
#else
static void _rtw_reordering_ctrl_timeout_handler(struct timer_list *t)
#endif
{
	struct recv_reorder_ctrl *preorder_ctrl;

#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
	preorder_ctrl = (struct recv_reorder_ctrl *)func_context;
#else
	preorder_ctrl = from_timer(preorder_ctrl, t, reordering_ctrl_timer);
#endif
	rtw_reordering_ctrl_timeout_handler(preorder_ctrl);
}

void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 15, 0)
	_init_timer(&(preorder_ctrl->reordering_ctrl_timer), padapter->pnetdev, _rtw_reordering_ctrl_timeout_handler, preorder_ctrl);
#else
	timer_setup(&preorder_ctrl->reordering_ctrl_timer, _rtw_reordering_ctrl_timeout_handler, 0);
#endif
}