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 <rtw_debug.h>
9 #include <linux/jiffies.h>
10 #include <net/cfg80211.h>
11 #include <asm/unaligned.h>
12
rtw_os_free_recvframe(union recv_frame * precvframe)13 void rtw_os_free_recvframe(union recv_frame *precvframe)
14 {
15 if (precvframe->u.hdr.pkt) {
16 dev_kfree_skb_any(precvframe->u.hdr.pkt);/* free skb by driver */
17
18 precvframe->u.hdr.pkt = NULL;
19 }
20 }
21
22 /* alloc os related resource in union recv_frame */
rtw_os_recv_resource_alloc(struct adapter * padapter,union recv_frame * precvframe)23 void rtw_os_recv_resource_alloc(struct adapter *padapter, union recv_frame *precvframe)
24 {
25 precvframe->u.hdr.pkt_newalloc = precvframe->u.hdr.pkt = NULL;
26 }
27
28 /* free os related resource in union recv_frame */
rtw_os_recv_resource_free(struct recv_priv * precvpriv)29 void rtw_os_recv_resource_free(struct recv_priv *precvpriv)
30 {
31 signed int i;
32 union recv_frame *precvframe;
33
34 precvframe = (union recv_frame *) precvpriv->precv_frame_buf;
35
36 for (i = 0; i < NR_RECVFRAME; i++) {
37 if (precvframe->u.hdr.pkt) {
38 /* free skb by driver */
39 dev_kfree_skb_any(precvframe->u.hdr.pkt);
40 precvframe->u.hdr.pkt = NULL;
41 }
42 precvframe++;
43 }
44 }
45
46 /* free os related resource in struct recv_buf */
rtw_os_recvbuf_resource_free(struct adapter * padapter,struct recv_buf * precvbuf)47 void rtw_os_recvbuf_resource_free(struct adapter *padapter, struct recv_buf *precvbuf)
48 {
49 if (precvbuf->pskb) {
50 dev_kfree_skb_any(precvbuf->pskb);
51 }
52 }
53
rtw_os_alloc_msdu_pkt(union recv_frame * prframe,u16 nSubframe_Length,u8 * pdata)54 struct sk_buff *rtw_os_alloc_msdu_pkt(union recv_frame *prframe, u16 nSubframe_Length, u8 *pdata)
55 {
56 u16 eth_type;
57 struct sk_buff *sub_skb;
58 struct rx_pkt_attrib *pattrib;
59
60 pattrib = &prframe->u.hdr.attrib;
61
62 sub_skb = rtw_skb_alloc(nSubframe_Length + 12);
63 if (!sub_skb)
64 return NULL;
65
66 skb_reserve(sub_skb, 12);
67 skb_put_data(sub_skb, (pdata + ETH_HLEN), nSubframe_Length);
68
69 eth_type = get_unaligned_be16(&sub_skb->data[6]);
70
71 if (sub_skb->len >= 8 &&
72 ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
73 eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
74 !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
75 /*
76 * remove RFC1042 or Bridge-Tunnel encapsulation and replace
77 * EtherType
78 */
79 skb_pull(sub_skb, SNAP_SIZE);
80 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
81 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
82 } else {
83 __be16 len;
84 /* Leave Ethernet header part of hdr and full payload */
85 len = htons(sub_skb->len);
86 memcpy(skb_push(sub_skb, 2), &len, 2);
87 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
88 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
89 }
90
91 return sub_skb;
92 }
93
rtw_os_recv_indicate_pkt(struct adapter * padapter,struct sk_buff * pkt,struct rx_pkt_attrib * pattrib)94 void rtw_os_recv_indicate_pkt(struct adapter *padapter, struct sk_buff *pkt, struct rx_pkt_attrib *pattrib)
95 {
96 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
97
98 /* Indicate the packets to upper layer */
99 if (pkt) {
100 if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
101 struct sk_buff *pskb2 = NULL;
102 struct sta_info *psta = NULL;
103 struct sta_priv *pstapriv = &padapter->stapriv;
104 int bmcast = IS_MCAST(pattrib->dst);
105
106 if (memcmp(pattrib->dst, myid(&padapter->eeprompriv), ETH_ALEN)) {
107 if (bmcast) {
108 psta = rtw_get_bcmc_stainfo(padapter);
109 pskb2 = skb_clone(pkt, GFP_ATOMIC);
110 } else {
111 psta = rtw_get_stainfo(pstapriv, pattrib->dst);
112 }
113
114 if (psta) {
115 struct net_device *pnetdev = (struct net_device *)padapter->pnetdev;
116 /* skb->ip_summed = CHECKSUM_NONE; */
117 pkt->dev = pnetdev;
118 skb_set_queue_mapping(pkt, rtw_recv_select_queue(pkt));
119
120 _rtw_xmit_entry(pkt, pnetdev);
121
122 if (bmcast && pskb2)
123 pkt = pskb2;
124 else
125 return;
126 }
127 } else {
128 /* to APself */
129 }
130 }
131
132 pkt->protocol = eth_type_trans(pkt, padapter->pnetdev);
133 pkt->dev = padapter->pnetdev;
134
135 pkt->ip_summed = CHECKSUM_NONE;
136
137 rtw_netif_rx(padapter->pnetdev, pkt);
138 }
139 }
140
rtw_handle_tkip_mic_err(struct adapter * padapter,u8 bgroup)141 void rtw_handle_tkip_mic_err(struct adapter *padapter, u8 bgroup)
142 {
143 enum nl80211_key_type key_type = 0;
144 union iwreq_data wrqu;
145 struct iw_michaelmicfailure ev;
146 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
147 struct security_priv *psecuritypriv = &padapter->securitypriv;
148 unsigned long cur_time = 0;
149
150 if (psecuritypriv->last_mic_err_time == 0) {
151 psecuritypriv->last_mic_err_time = jiffies;
152 } else {
153 cur_time = jiffies;
154
155 if (cur_time - psecuritypriv->last_mic_err_time < 60*HZ) {
156 psecuritypriv->btkip_countermeasure = true;
157 psecuritypriv->last_mic_err_time = 0;
158 psecuritypriv->btkip_countermeasure_time = cur_time;
159 } else {
160 psecuritypriv->last_mic_err_time = jiffies;
161 }
162 }
163
164 if (bgroup) {
165 key_type |= NL80211_KEYTYPE_GROUP;
166 } else {
167 key_type |= NL80211_KEYTYPE_PAIRWISE;
168 }
169
170 cfg80211_michael_mic_failure(padapter->pnetdev, (u8 *)&pmlmepriv->assoc_bssid[0], key_type, -1,
171 NULL, GFP_ATOMIC);
172
173 memset(&ev, 0x00, sizeof(ev));
174 if (bgroup) {
175 ev.flags |= IW_MICFAILURE_GROUP;
176 } else {
177 ev.flags |= IW_MICFAILURE_PAIRWISE;
178 }
179
180 ev.src_addr.sa_family = ARPHRD_ETHER;
181 memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN);
182
183 memset(&wrqu, 0x00, sizeof(wrqu));
184 wrqu.data.length = sizeof(ev);
185 }
186
rtw_recv_indicatepkt(struct adapter * padapter,union recv_frame * precv_frame)187 int rtw_recv_indicatepkt(struct adapter *padapter, union recv_frame *precv_frame)
188 {
189 struct recv_priv *precvpriv;
190 struct __queue *pfree_recv_queue;
191 struct sk_buff *skb;
192 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
193
194 precvpriv = &(padapter->recvpriv);
195 pfree_recv_queue = &(precvpriv->free_recv_queue);
196
197 skb = precv_frame->u.hdr.pkt;
198 if (!skb)
199 goto _recv_indicatepkt_drop;
200
201 skb->data = precv_frame->u.hdr.rx_data;
202
203 skb_set_tail_pointer(skb, precv_frame->u.hdr.len);
204
205 skb->len = precv_frame->u.hdr.len;
206
207 rtw_os_recv_indicate_pkt(padapter, skb, pattrib);
208
209 /* pointers to NULL before rtw_free_recvframe() */
210 precv_frame->u.hdr.pkt = NULL;
211
212 rtw_free_recvframe(precv_frame, pfree_recv_queue);
213
214 return _SUCCESS;
215
216 _recv_indicatepkt_drop:
217
218 /* enqueue back to free_recv_queue */
219 rtw_free_recvframe(precv_frame, pfree_recv_queue);
220
221 return _FAIL;
222 }
223
rtw_init_recv_timer(struct recv_reorder_ctrl * preorder_ctrl)224 void rtw_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl)
225 {
226 timer_setup(&preorder_ctrl->reordering_ctrl_timer,
227 rtw_reordering_ctrl_timeout_handler, 0);
228
229 }
230