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 | |
13 | void rtw_os_free_recvframe(union recv_frame *precvframe) |
14 | { |
15 | if (precvframe->u.hdr.pkt) { |
16 | dev_kfree_skb_any(skb: 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 */ |
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 */ |
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(skb: 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 */ |
47 | void rtw_os_recvbuf_resource_free(struct adapter *padapter, struct recv_buf *precvbuf) |
48 | { |
49 | if (precvbuf->pskb) { |
50 | dev_kfree_skb_any(skb: precvbuf->pskb); |
51 | } |
52 | } |
53 | |
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(skb: sub_skb, len: 12); |
67 | skb_put_data(skb: sub_skb, data: (pdata + ETH_HLEN), len: nSubframe_Length); |
68 | |
69 | eth_type = get_unaligned_be16(p: &sub_skb->data[6]); |
70 | |
71 | if (sub_skb->len >= 8 && |
72 | ((!memcmp(p: sub_skb->data, q: rfc1042_header, SNAP_SIZE) && |
73 | eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) || |
74 | !memcmp(p: sub_skb->data, q: bridge_tunnel_header, SNAP_SIZE))) { |
75 | /* |
76 | * remove RFC1042 or Bridge-Tunnel encapsulation and replace |
77 | * EtherType |
78 | */ |
79 | skb_pull(skb: 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 | |
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_multicast_ether_addr(addr: pattrib->dst); |
105 | |
106 | if (memcmp(p: pattrib->dst, q: myid(peepriv: &padapter->eeprompriv), ETH_ALEN)) { |
107 | if (bmcast) { |
108 | psta = rtw_get_bcmc_stainfo(padapter); |
109 | pskb2 = skb_clone(skb: pkt, GFP_ATOMIC); |
110 | } else { |
111 | psta = rtw_get_stainfo(pstapriv, hwaddr: 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(skb: pkt, queue_mapping: rtw_recv_select_queue(skb: 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(skb: pkt, dev: 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 | |
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(dev: padapter->pnetdev, addr: (u8 *)&pmlmepriv->assoc_bssid[0], key_type, key_id: -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 | |
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, offset: precv_frame->u.hdr.len); |
204 | |
205 | skb->len = precv_frame->u.hdr.len; |
206 | |
207 | rtw_os_recv_indicate_pkt(padapter, pkt: skb, pattrib); |
208 | |
209 | /* pointers to NULL before rtw_free_recvframe() */ |
210 | precv_frame->u.hdr.pkt = NULL; |
211 | |
212 | rtw_free_recvframe(precvframe: 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(precvframe: precv_frame, pfree_recv_queue); |
220 | |
221 | return _FAIL; |
222 | } |
223 | |
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 | |