1 // SPDX-License-Identifier: GPL-2.0
2 /******************************************************************************
3 *
4 * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
5 *
6 ******************************************************************************/
7 #include <drv_types.h>
8 #include <linux/jiffies.h>
9 #include <net/cfg80211.h>
10 #include <linux/unaligned.h>
11
rtw_os_free_recvframe(union recv_frame * precvframe)12 void rtw_os_free_recvframe(union recv_frame *precvframe)
13 {
14 if (precvframe->u.hdr.pkt) {
15 dev_kfree_skb_any(precvframe->u.hdr.pkt);/* free skb by driver */
16
17 precvframe->u.hdr.pkt = NULL;
18 }
19 }
20
21 /* alloc os related resource in union recv_frame */
rtw_os_recv_resource_alloc(struct adapter * padapter,union recv_frame * precvframe)22 void rtw_os_recv_resource_alloc(struct adapter *padapter, union recv_frame *precvframe)
23 {
24 precvframe->u.hdr.pkt_newalloc = precvframe->u.hdr.pkt = NULL;
25 }
26
27 /* free os related resource in union recv_frame */
rtw_os_recv_resource_free(struct recv_priv * precvpriv)28 void rtw_os_recv_resource_free(struct recv_priv *precvpriv)
29 {
30 signed int i;
31 union recv_frame *precvframe;
32
33 precvframe = (union recv_frame *) precvpriv->precv_frame_buf;
34
35 for (i = 0; i < NR_RECVFRAME; i++) {
36 if (precvframe->u.hdr.pkt) {
37 /* free skb by driver */
38 dev_kfree_skb_any(precvframe->u.hdr.pkt);
39 precvframe->u.hdr.pkt = NULL;
40 }
41 precvframe++;
42 }
43 }
44
45 /* free os related resource in struct recv_buf */
rtw_os_recvbuf_resource_free(struct adapter * padapter,struct recv_buf * precvbuf)46 void rtw_os_recvbuf_resource_free(struct adapter *padapter, struct recv_buf *precvbuf)
47 {
48 if (precvbuf->pskb)
49 dev_kfree_skb_any(precvbuf->pskb);
50 }
51
rtw_os_alloc_msdu_pkt(union recv_frame * prframe,u16 nSubframe_Length,u8 * pdata)52 struct sk_buff *rtw_os_alloc_msdu_pkt(union recv_frame *prframe, u16 nSubframe_Length, u8 *pdata)
53 {
54 u16 eth_type;
55 struct sk_buff *sub_skb;
56 struct rx_pkt_attrib *pattrib;
57
58 pattrib = &prframe->u.hdr.attrib;
59
60 sub_skb = rtw_skb_alloc(nSubframe_Length + 12);
61 if (!sub_skb)
62 return NULL;
63
64 skb_reserve(sub_skb, 12);
65 skb_put_data(sub_skb, (pdata + ETH_HLEN), nSubframe_Length);
66
67 eth_type = get_unaligned_be16(&sub_skb->data[6]);
68
69 if (sub_skb->len >= 8 &&
70 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
71 eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
72 !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
73 /*
74 * remove RFC1042 or Bridge-Tunnel encapsulation and replace
75 * EtherType
76 */
77 skb_pull(sub_skb, SNAP_SIZE);
78 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
79 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
80 } else {
81 __be16 len;
82 /* Leave Ethernet header part of hdr and full payload */
83 len = htons(sub_skb->len);
84 memcpy(skb_push(sub_skb, 2), &len, 2);
85 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
86 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
87 }
88
89 return sub_skb;
90 }
91
rtw_os_recv_indicate_pkt(struct adapter * padapter,struct sk_buff * pkt,struct rx_pkt_attrib * pattrib)92 void rtw_os_recv_indicate_pkt(struct adapter *padapter, struct sk_buff *pkt, struct rx_pkt_attrib *pattrib)
93 {
94 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
95
96 /* Indicate the packets to upper layer */
97 if (pkt) {
98 if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
99 struct sk_buff *pskb2 = NULL;
100 struct sta_info *psta = NULL;
101 struct sta_priv *pstapriv = &padapter->stapriv;
102 int bmcast = is_multicast_ether_addr(pattrib->dst);
103
104 if (memcmp(pattrib->dst, myid(&padapter->eeprompriv), ETH_ALEN)) {
105 if (bmcast) {
106 psta = rtw_get_bcmc_stainfo(padapter);
107 pskb2 = skb_clone(pkt, GFP_ATOMIC);
108 } else {
109 psta = rtw_get_stainfo(pstapriv, pattrib->dst);
110 }
111
112 if (psta) {
113 struct net_device *pnetdev = (struct net_device *)padapter->pnetdev;
114 /* skb->ip_summed = CHECKSUM_NONE; */
115 pkt->dev = pnetdev;
116 skb_set_queue_mapping(pkt, rtw_recv_select_queue(pkt));
117
118 _rtw_xmit_entry(pkt, pnetdev);
119
120 if (bmcast && pskb2)
121 pkt = pskb2;
122 else
123 return;
124 }
125 } else {
126 /* to APself */
127 }
128 }
129
130 pkt->protocol = eth_type_trans(pkt, padapter->pnetdev);
131 pkt->dev = padapter->pnetdev;
132
133 pkt->ip_summed = CHECKSUM_NONE;
134
135 rtw_netif_rx(padapter->pnetdev, pkt);
136 }
137 }
138
rtw_handle_tkip_mic_err(struct adapter * padapter,u8 bgroup)139 void rtw_handle_tkip_mic_err(struct adapter *padapter, u8 bgroup)
140 {
141 enum nl80211_key_type key_type = 0;
142 union iwreq_data wrqu;
143 struct iw_michaelmicfailure ev;
144 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
145 struct security_priv *psecuritypriv = &padapter->securitypriv;
146 unsigned long cur_time = 0;
147
148 if (psecuritypriv->last_mic_err_time == 0) {
149 psecuritypriv->last_mic_err_time = jiffies;
150 } else {
151 cur_time = jiffies;
152
153 if (cur_time - psecuritypriv->last_mic_err_time < 60*HZ) {
154 psecuritypriv->btkip_countermeasure = true;
155 psecuritypriv->last_mic_err_time = 0;
156 psecuritypriv->btkip_countermeasure_time = cur_time;
157 } else {
158 psecuritypriv->last_mic_err_time = jiffies;
159 }
160 }
161
162 if (bgroup)
163 key_type |= NL80211_KEYTYPE_GROUP;
164 else
165 key_type |= NL80211_KEYTYPE_PAIRWISE;
166
167 cfg80211_michael_mic_failure(padapter->pnetdev, (u8 *)&pmlmepriv->assoc_bssid[0], key_type, -1,
168 NULL, GFP_ATOMIC);
169
170 memset(&ev, 0x00, sizeof(ev));
171 if (bgroup)
172 ev.flags |= IW_MICFAILURE_GROUP;
173 else
174 ev.flags |= IW_MICFAILURE_PAIRWISE;
175
176 ev.src_addr.sa_family = ARPHRD_ETHER;
177 memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
178
179 memset(&wrqu, 0x00, sizeof(wrqu));
180 wrqu.data.length = sizeof(ev);
181 }
182
rtw_recv_indicatepkt(struct adapter * padapter,union recv_frame * precv_frame)183 int rtw_recv_indicatepkt(struct adapter *padapter, union recv_frame *precv_frame)
184 {
185 struct recv_priv *precvpriv;
186 struct __queue *pfree_recv_queue;
187 struct sk_buff *skb;
188 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
189
190 precvpriv = &(padapter->recvpriv);
191 pfree_recv_queue = &(precvpriv->free_recv_queue);
192
193 skb = precv_frame->u.hdr.pkt;
194 if (!skb)
195 goto _recv_indicatepkt_drop;
196
197 skb->data = precv_frame->u.hdr.rx_data;
198
199 skb_set_tail_pointer(skb, precv_frame->u.hdr.len);
200
201 skb->len = precv_frame->u.hdr.len;
202
203 rtw_os_recv_indicate_pkt(padapter, skb, pattrib);
204
205 /* pointers to NULL before rtw_free_recvframe() */
206 precv_frame->u.hdr.pkt = NULL;
207
208 rtw_free_recvframe(precv_frame, pfree_recv_queue);
209
210 return _SUCCESS;
211
212 _recv_indicatepkt_drop:
213
214 /* enqueue back to free_recv_queue */
215 rtw_free_recvframe(precv_frame, pfree_recv_queue);
216
217 return _FAIL;
218 }
219
rtw_init_recv_timer(struct recv_reorder_ctrl * preorder_ctrl)220 void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
221 {
222 timer_setup(&preorder_ctrl->reordering_ctrl_timer,
223 rtw_reordering_ctrl_timeout_handler, 0);
224
225 }
226