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 }
52
rtw_os_alloc_msdu_pkt(union recv_frame * prframe,u16 nSubframe_Length,u8 * pdata)53 struct sk_buff *rtw_os_alloc_msdu_pkt(union recv_frame *prframe, u16 nSubframe_Length, u8 *pdata)
54 {
55 u16 eth_type;
56 struct sk_buff *sub_skb;
57 struct rx_pkt_attrib *pattrib;
58
59 pattrib = &prframe->u.hdr.attrib;
60
61 sub_skb = rtw_skb_alloc(nSubframe_Length + 12);
62 if (!sub_skb)
63 return NULL;
64
65 skb_reserve(sub_skb, 12);
66 skb_put_data(sub_skb, (pdata + ETH_HLEN), nSubframe_Length);
67
68 eth_type = get_unaligned_be16(&sub_skb->data[6]);
69
70 if (sub_skb->len >= 8 &&
71 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
72 eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
73 !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
74 /*
75 * remove RFC1042 or Bridge-Tunnel encapsulation and replace
76 * EtherType
77 */
78 skb_pull(sub_skb, SNAP_SIZE);
79 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
80 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
81 } else {
82 __be16 len;
83 /* Leave Ethernet header part of hdr and full payload */
84 len = htons(sub_skb->len);
85 memcpy(skb_push(sub_skb, 2), &len, 2);
86 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
87 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
88 }
89
90 return sub_skb;
91 }
92
rtw_os_recv_indicate_pkt(struct adapter * padapter,struct sk_buff * pkt,struct rx_pkt_attrib * pattrib)93 void rtw_os_recv_indicate_pkt(struct adapter *padapter, struct sk_buff *pkt, struct rx_pkt_attrib *pattrib)
94 {
95 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
96
97 /* Indicate the packets to upper layer */
98 if (pkt) {
99 if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
100 struct sk_buff *pskb2 = NULL;
101 struct sta_info *psta = NULL;
102 struct sta_priv *pstapriv = &padapter->stapriv;
103 int bmcast = is_multicast_ether_addr(pattrib->dst);
104
105 if (memcmp(pattrib->dst, myid(&padapter->eeprompriv), ETH_ALEN)) {
106 if (bmcast) {
107 psta = rtw_get_bcmc_stainfo(padapter);
108 pskb2 = skb_clone(pkt, GFP_ATOMIC);
109 } else {
110 psta = rtw_get_stainfo(pstapriv, pattrib->dst);
111 }
112
113 if (psta) {
114 struct net_device *pnetdev = (struct net_device *)padapter->pnetdev;
115 /* skb->ip_summed = CHECKSUM_NONE; */
116 pkt->dev = pnetdev;
117 skb_set_queue_mapping(pkt, rtw_recv_select_queue(pkt));
118
119 _rtw_xmit_entry(pkt, pnetdev);
120
121 if (bmcast && pskb2)
122 pkt = pskb2;
123 else
124 return;
125 }
126 } else {
127 /* to APself */
128 }
129 }
130
131 pkt->protocol = eth_type_trans(pkt, padapter->pnetdev);
132 pkt->dev = padapter->pnetdev;
133
134 pkt->ip_summed = CHECKSUM_NONE;
135
136 rtw_netif_rx(padapter->pnetdev, pkt);
137 }
138 }
139
rtw_handle_tkip_mic_err(struct adapter * padapter,u8 bgroup)140 void rtw_handle_tkip_mic_err(struct adapter *padapter, u8 bgroup)
141 {
142 enum nl80211_key_type key_type = 0;
143 union iwreq_data wrqu;
144 struct iw_michaelmicfailure ev;
145 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
146 struct security_priv *psecuritypriv = &padapter->securitypriv;
147 unsigned long cur_time = 0;
148
149 if (psecuritypriv->last_mic_err_time == 0) {
150 psecuritypriv->last_mic_err_time = jiffies;
151 } else {
152 cur_time = jiffies;
153
154 if (cur_time - psecuritypriv->last_mic_err_time < 60*HZ) {
155 psecuritypriv->btkip_countermeasure = true;
156 psecuritypriv->last_mic_err_time = 0;
157 psecuritypriv->btkip_countermeasure_time = cur_time;
158 } else {
159 psecuritypriv->last_mic_err_time = jiffies;
160 }
161 }
162
163 if (bgroup) {
164 key_type |= NL80211_KEYTYPE_GROUP;
165 } else {
166 key_type |= NL80211_KEYTYPE_PAIRWISE;
167 }
168
169 cfg80211_michael_mic_failure(padapter->pnetdev, (u8 *)&pmlmepriv->assoc_bssid[0], key_type, -1,
170 NULL, GFP_ATOMIC);
171
172 memset(&ev, 0x00, sizeof(ev));
173 if (bgroup) {
174 ev.flags |= IW_MICFAILURE_GROUP;
175 } else {
176 ev.flags |= IW_MICFAILURE_PAIRWISE;
177 }
178
179 ev.src_addr.sa_family = ARPHRD_ETHER;
180 memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
181
182 memset(&wrqu, 0x00, sizeof(wrqu));
183 wrqu.data.length = sizeof(ev);
184 }
185
rtw_recv_indicatepkt(struct adapter * padapter,union recv_frame * precv_frame)186 int rtw_recv_indicatepkt(struct adapter *padapter, union recv_frame *precv_frame)
187 {
188 struct recv_priv *precvpriv;
189 struct __queue *pfree_recv_queue;
190 struct sk_buff *skb;
191 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
192
193 precvpriv = &(padapter->recvpriv);
194 pfree_recv_queue = &(precvpriv->free_recv_queue);
195
196 skb = precv_frame->u.hdr.pkt;
197 if (!skb)
198 goto _recv_indicatepkt_drop;
199
200 skb->data = precv_frame->u.hdr.rx_data;
201
202 skb_set_tail_pointer(skb, precv_frame->u.hdr.len);
203
204 skb->len = precv_frame->u.hdr.len;
205
206 rtw_os_recv_indicate_pkt(padapter, skb, pattrib);
207
208 /* pointers to NULL before rtw_free_recvframe() */
209 precv_frame->u.hdr.pkt = NULL;
210
211 rtw_free_recvframe(precv_frame, pfree_recv_queue);
212
213 return _SUCCESS;
214
215 _recv_indicatepkt_drop:
216
217 /* enqueue back to free_recv_queue */
218 rtw_free_recvframe(precv_frame, pfree_recv_queue);
219
220 return _FAIL;
221 }
222
rtw_init_recv_timer(struct recv_reorder_ctrl * preorder_ctrl)223 void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
224 {
225 timer_setup(&preorder_ctrl->reordering_ctrl_timer,
226 rtw_reordering_ctrl_timeout_handler, 0);
227
228 }
229