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(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(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(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(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 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 } 140 141 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 } 186 187 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 } 223 224 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