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Mon, 2 Mar 2020 16:34:36 +0000 From: To: CC: , , , , , , , , Subject: [PATCH v4 10/18] wilc1000: add mon.c Thread-Topic: [PATCH v4 10/18] wilc1000: add mon.c Thread-Index: AQHV8LB2sRoFViCP0k6/3OqqdxXOmg== Date: Mon, 2 Mar 2020 16:34:36 +0000 Message-ID: <20200302163414.4342-11-ajay.kathat@microchip.com> References: <20200302163414.4342-1-ajay.kathat@microchip.com> In-Reply-To: <20200302163414.4342-1-ajay.kathat@microchip.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.17.1 x-originating-ip: [121.244.27.38] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 0439f89e-a642-4d9f-8557-08d7bec798c5 x-ms-traffictypediagnostic: BN6PR11MB4098: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:1284; x-forefront-prvs: 033054F29A x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(376002)(396003)(39860400002)(136003)(366004)(346002)(199004)(189003)(316002)(6916009)(86362001)(6512007)(2616005)(478600001)(71200400001)(54906003)(4326008)(64756008)(186003)(107886003)(66446008)(5660300002)(91956017)(76116006)(8676002)(66476007)(66946007)(6486002)(6506007)(66556008)(26005)(81156014)(81166006)(2906002)(1076003)(36756003)(8936002); DIR:OUT; SFP:1101; SCL:1; SRVR:BN6PR11MB4098; H:BN6PR11MB3985.namprd11.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: microchip.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: dIAtIMrtt6A5FCq0grOkdoXNCjyB30hZxJjxwfCtTCpfClR0hS/j1PS+h1Gphtx3COq1qwTajtKXHYCeT9zoErs3JVCsfHBrrf7xkDNzI5mmDMnVUvBKwuXVmM0CkKivRpXEzAPYmayOT0Qy5qvUKBA19P75xbEJMUYnHeUeyyKJPjPhuV++/GLiLV/v01Lp9ineFXo2hmFn+bgjR54hixzanqEiPu3adOQ3P4o5ZFZ25dda9ZeW0c7NxokXSPYKbtpvJgGQSPar+1owoMpxCzg2NsKvaLfrk16be8iKMOOEwoy4xWhy2b63Qm9YIBY+aO9jlOoXx3o0O04YkBoARoyGQW5joXpxyF3erUORw8SYH2YrbA40ExGU8QEy6hFZB+sJYbQC1YVwv/43w+mC83yChey8EzW39VRB7krQKii5XAnXLrhcntGVYKpN3I1s x-ms-exchange-antispam-messagedata: pVQ9+bJyIYdvh/usKVg7ANGMyIubrx7xP0I+ok29XetWnO1bEKeht1CBlMqk/h7mtGratjEvyCvGPEaR4wmQMyDWizdbGh2ZjsFDIfXO1TfwTM30S9OsR8Dv4VrmbwnBsv4PxbRT/2jUpavcVUzSYg== MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 0439f89e-a642-4d9f-8557-08d7bec798c5 X-MS-Exchange-CrossTenant-originalarrivaltime: 02 Mar 2020 16:34:36.5476 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: jeOVO+hZkk0MHHiHOKjdfVKCizKzerMW2YfRwlKEEWrnDPI8I1DQqtqRKlEERsML4/1sYiJWDyz951np7DCK0IlgjPCEbbhNtAMpOxu6JzQ= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR11MB4098 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Ajay Singh Moved 'drivers/staging/wilc1000/mon.c' to 'drivers/net/wireless/microchip/wilc1000/mon.c'. Signed-off-by: Ajay Singh --- drivers/net/wireless/microchip/wilc1000/mon.c | 260 ++++++++++++++++++ 1 file changed, 260 insertions(+) create mode 100644 drivers/net/wireless/microchip/wilc1000/mon.c diff --git a/drivers/net/wireless/microchip/wilc1000/mon.c b/drivers/net/wireless/microchip/wilc1000/mon.c new file mode 100644 index 000000000000..60331417bd98 --- /dev/null +++ b/drivers/net/wireless/microchip/wilc1000/mon.c @@ -0,0 +1,260 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries. + * All rights reserved. + */ + +#include "cfg80211.h" + +struct wilc_wfi_radiotap_hdr { + struct ieee80211_radiotap_header hdr; + u8 rate; +} __packed; + +struct wilc_wfi_radiotap_cb_hdr { + struct ieee80211_radiotap_header hdr; + u8 rate; + u8 dump; + u16 tx_flags; +} __packed; + +#define TX_RADIOTAP_PRESENT ((1 << IEEE80211_RADIOTAP_RATE) | \ + (1 << IEEE80211_RADIOTAP_TX_FLAGS)) + +void wilc_wfi_monitor_rx(struct net_device *mon_dev, u8 *buff, u32 size) +{ + u32 header, pkt_offset; + struct sk_buff *skb = NULL; + struct wilc_wfi_radiotap_hdr *hdr; + struct wilc_wfi_radiotap_cb_hdr *cb_hdr; + + if (!mon_dev) + return; + + if (!netif_running(mon_dev)) + return; + + /* Get WILC header */ + header = get_unaligned_le32(buff - HOST_HDR_OFFSET); + /* + * The packet offset field contain info about what type of management + * the frame we are dealing with and ack status + */ + pkt_offset = FIELD_GET(WILC_PKT_HDR_OFFSET_FIELD, header); + + if (pkt_offset & IS_MANAGMEMENT_CALLBACK) { + /* hostapd callback mgmt frame */ + + skb = dev_alloc_skb(size + sizeof(*cb_hdr)); + if (!skb) + return; + + skb_put_data(skb, buff, size); + + cb_hdr = skb_push(skb, sizeof(*cb_hdr)); + memset(cb_hdr, 0, sizeof(*cb_hdr)); + + cb_hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */ + + cb_hdr->hdr.it_len = cpu_to_le16(sizeof(*cb_hdr)); + + cb_hdr->hdr.it_present = cpu_to_le32(TX_RADIOTAP_PRESENT); + + cb_hdr->rate = 5; + + if (pkt_offset & IS_MGMT_STATUS_SUCCES) { + /* success */ + cb_hdr->tx_flags = IEEE80211_RADIOTAP_F_TX_RTS; + } else { + cb_hdr->tx_flags = IEEE80211_RADIOTAP_F_TX_FAIL; + } + + } else { + skb = dev_alloc_skb(size + sizeof(*hdr)); + + if (!skb) + return; + + skb_put_data(skb, buff, size); + hdr = skb_push(skb, sizeof(*hdr)); + memset(hdr, 0, sizeof(struct wilc_wfi_radiotap_hdr)); + hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */ + hdr->hdr.it_len = cpu_to_le16(sizeof(*hdr)); + hdr->hdr.it_present = cpu_to_le32 + (1 << IEEE80211_RADIOTAP_RATE); + hdr->rate = 5; + } + + skb->dev = mon_dev; + skb_reset_mac_header(skb); + skb->ip_summed = CHECKSUM_UNNECESSARY; + skb->pkt_type = PACKET_OTHERHOST; + skb->protocol = htons(ETH_P_802_2); + memset(skb->cb, 0, sizeof(skb->cb)); + + netif_rx(skb); +} + +struct tx_complete_mon_data { + int size; + void *buff; +}; + +static void mgmt_tx_complete(void *priv, int status) +{ + struct tx_complete_mon_data *pv_data = priv; + /* + * in case of fully hosting mode, the freeing will be done + * in response to the cfg packet + */ + kfree(pv_data->buff); + + kfree(pv_data); +} + +static int mon_mgmt_tx(struct net_device *dev, const u8 *buf, size_t len) +{ + struct tx_complete_mon_data *mgmt_tx = NULL; + + if (!dev) + return -EFAULT; + + netif_stop_queue(dev); + mgmt_tx = kmalloc(sizeof(*mgmt_tx), GFP_ATOMIC); + if (!mgmt_tx) + return -ENOMEM; + + mgmt_tx->buff = kmemdup(buf, len, GFP_ATOMIC); + if (!mgmt_tx->buff) { + kfree(mgmt_tx); + return -ENOMEM; + } + + mgmt_tx->size = len; + + wilc_wlan_txq_add_mgmt_pkt(dev, mgmt_tx, mgmt_tx->buff, mgmt_tx->size, + mgmt_tx_complete); + + netif_wake_queue(dev); + return 0; +} + +static netdev_tx_t wilc_wfi_mon_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + u32 rtap_len, ret = 0; + struct wilc_wfi_mon_priv *mon_priv; + struct sk_buff *skb2; + struct wilc_wfi_radiotap_cb_hdr *cb_hdr; + u8 srcadd[ETH_ALEN]; + u8 bssid[ETH_ALEN]; + + mon_priv = netdev_priv(dev); + if (!mon_priv) + return -EFAULT; + + rtap_len = ieee80211_get_radiotap_len(skb->data); + if (skb->len < rtap_len) + return -1; + + skb_pull(skb, rtap_len); + + if (skb->data[0] == 0xc0 && is_broadcast_ether_addr(&skb->data[4])) { + skb2 = dev_alloc_skb(skb->len + sizeof(*cb_hdr)); + if (!skb2) + return -ENOMEM; + + skb_put_data(skb2, skb->data, skb->len); + + cb_hdr = skb_push(skb2, sizeof(*cb_hdr)); + memset(cb_hdr, 0, sizeof(struct wilc_wfi_radiotap_cb_hdr)); + + cb_hdr->hdr.it_version = 0; /* PKTHDR_RADIOTAP_VERSION; */ + + cb_hdr->hdr.it_len = cpu_to_le16(sizeof(*cb_hdr)); + + cb_hdr->hdr.it_present = cpu_to_le32(TX_RADIOTAP_PRESENT); + + cb_hdr->rate = 5; + cb_hdr->tx_flags = 0x0004; + + skb2->dev = dev; + skb_reset_mac_header(skb2); + skb2->ip_summed = CHECKSUM_UNNECESSARY; + skb2->pkt_type = PACKET_OTHERHOST; + skb2->protocol = htons(ETH_P_802_2); + memset(skb2->cb, 0, sizeof(skb2->cb)); + + netif_rx(skb2); + + return 0; + } + skb->dev = mon_priv->real_ndev; + + ether_addr_copy(srcadd, &skb->data[10]); + ether_addr_copy(bssid, &skb->data[16]); + /* + * Identify if data or mgmt packet, if source address and bssid + * fields are equal send it to mgmt frames handler + */ + if (!(memcmp(srcadd, bssid, 6))) { + ret = mon_mgmt_tx(mon_priv->real_ndev, skb->data, skb->len); + if (ret) + netdev_err(dev, "fail to mgmt tx\n"); + dev_kfree_skb(skb); + } else { + ret = wilc_mac_xmit(skb, mon_priv->real_ndev); + } + + return ret; +} + +static const struct net_device_ops wilc_wfi_netdev_ops = { + .ndo_start_xmit = wilc_wfi_mon_xmit, + +}; + +struct net_device *wilc_wfi_init_mon_interface(struct wilc *wl, + const char *name, + struct net_device *real_dev) +{ + struct wilc_wfi_mon_priv *priv; + + /* If monitor interface is already initialized, return it */ + if (wl->monitor_dev) + return wl->monitor_dev; + + wl->monitor_dev = alloc_etherdev(sizeof(struct wilc_wfi_mon_priv)); + if (!wl->monitor_dev) + return NULL; + + wl->monitor_dev->type = ARPHRD_IEEE80211_RADIOTAP; + strncpy(wl->monitor_dev->name, name, IFNAMSIZ); + wl->monitor_dev->name[IFNAMSIZ - 1] = 0; + wl->monitor_dev->netdev_ops = &wilc_wfi_netdev_ops; + wl->monitor_dev->needs_free_netdev = true; + + if (register_netdevice(wl->monitor_dev)) { + netdev_err(real_dev, "register_netdevice failed\n"); + return NULL; + } + priv = netdev_priv(wl->monitor_dev); + if (!priv) + return NULL; + + priv->real_ndev = real_dev; + + return wl->monitor_dev; +} + +void wilc_wfi_deinit_mon_interface(struct wilc *wl, bool rtnl_locked) +{ + if (!wl->monitor_dev) + return; + + if (rtnl_locked) + unregister_netdevice(wl->monitor_dev); + else + unregister_netdev(wl->monitor_dev); + wl->monitor_dev = NULL; +}