/*
 * Linux cfg80211 Vendor Extension Code
 *
 * Copyright (C) 1999-2016, Broadcom Corporation
 * 
 *      Unless you and Broadcom execute a separate written software license
 * agreement governing use of this software, this software is licensed to you
 * under the terms of the GNU General Public License version 2 (the "GPL"),
 * available at http://www.broadcom.com/licenses/GPLv2.php, with the
 * following added to such license:
 * 
 *      As a special exception, the copyright holders of this software give you
 * permission to link this software with independent modules, and to copy and
 * distribute the resulting executable under terms of your choice, provided that
 * you also meet, for each linked independent module, the terms and conditions of
 * the license of that module.  An independent module is a module which is not
 * derived from this software.  The special exception does not apply to any
 * modifications of the software.
 * 
 *      Notwithstanding the above, under no circumstances may you combine this
 * software in any way with any other Broadcom software provided under a license
 * other than the GPL, without Broadcom's express prior written consent.
 *
 * $Id: wl_cfgvendor.c 455257 2014-02-13 08:10:24Z $
*/

/*
 * New vendor interface additon to nl80211/cfg80211 to allow vendors
 * to implement proprietary features over the cfg80211 stack.
*/

#include <typedefs.h>
#include <linuxver.h>
#include <osl.h>
#include <linux/kernel.h>

#include <bcmutils.h>
#include <bcmwifi_channels.h>
#include <bcmendian.h>
#include <proto/ethernet.h>
#include <proto/802.11.h>
#include <linux/if_arp.h>
#include <asm/uaccess.h>

#include <dngl_stats.h>
#include <dhd.h>
#include <dhdioctl.h>
#include <wlioctl.h>
#include <dhd_cfg80211.h>
#ifdef PNO_SUPPORT
#include <dhd_pno.h>
#endif /* PNO_SUPPORT */

#include <proto/ethernet.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/netdevice.h>
#include <linux/sched.h>
#include <linux/etherdevice.h>
#include <linux/wireless.h>
#include <linux/ieee80211.h>
#include <linux/wait.h>
#include <net/cfg80211.h>
#include <net/rtnetlink.h>

#include <wlioctl.h>
#include <wldev_common.h>
#include <wl_cfg80211.h>
#include <wl_cfgp2p.h>
#include <wl_android.h>
#include <wl_cfgvendor.h>
#ifdef PROP_TXSTATUS
#include <dhd_wlfc.h>
#endif

#if (LINUX_VERSION_CODE > KERNEL_VERSION(3, 13, 0)) || defined(WL_VENDOR_EXT_SUPPORT)
/*
 * This API is to be used for asynchronous vendor events. This
 * shouldn't be used in response to a vendor command from its
 * do_it handler context (instead wl_cfgvendor_send_cmd_reply should
 * be used).
 */
int wl_cfgvendor_send_async_event(struct wiphy *wiphy,
	struct net_device *dev, int event_id, const void  *data, int len)
{
	u16 kflags;
	struct sk_buff *skb;

	kflags = in_atomic() ? GFP_ATOMIC : GFP_KERNEL;

	/* Alloc the SKB for vendor_event */
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0))
	skb = cfg80211_vendor_event_alloc(wiphy, NULL, len, event_id, kflags);
#else
	skb = cfg80211_vendor_event_alloc(wiphy, len, event_id, kflags);
#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0)) */
	if (!skb) {
		WL_ERR(("skb alloc failed"));
		return -ENOMEM;
	}

	/* Push the data to the skb */
	nla_put_nohdr(skb, len, data);

	cfg80211_vendor_event(skb, kflags);

	return 0;
}

static int wl_cfgvendor_send_cmd_reply(struct wiphy *wiphy,
	struct net_device *dev, const void  *data, int len)
{
	struct sk_buff *skb;

	/* Alloc the SKB for vendor_event */
	skb = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, len);
	if (unlikely(!skb)) {
		WL_ERR(("skb alloc failed"));
		return -ENOMEM;
	}

	/* Push the data to the skb */
	nla_put_nohdr(skb, len, data);

	return cfg80211_vendor_cmd_reply(skb);
}

static int wl_cfgvendor_priv_string_handler(struct wiphy *wiphy,
	struct wireless_dev *wdev, const void  *data, int len)
{
	struct bcm_cfg80211 *cfg = wiphy_priv(wiphy);
	int err = 0;
	int data_len = 0;

	WL_INFO(("%s: Enter \n", __func__));

	bzero(cfg->ioctl_buf, WLC_IOCTL_MAXLEN);

	if (strncmp((char *)data, BRCM_VENDOR_SCMD_CAPA, strlen(BRCM_VENDOR_SCMD_CAPA)) == 0) {
		err = wldev_iovar_getbuf(bcmcfg_to_prmry_ndev(cfg), "cap", NULL, 0,
			cfg->ioctl_buf, WLC_IOCTL_MAXLEN, &cfg->ioctl_buf_sync);
		if (unlikely(err)) {
			WL_ERR(("error (%d)\n", err));
			return err;
		}
		data_len = strlen(cfg->ioctl_buf);
		cfg->ioctl_buf[data_len] = '\0';
	}

	err =  wl_cfgvendor_send_cmd_reply(wiphy, bcmcfg_to_prmry_ndev(cfg),
		cfg->ioctl_buf, data_len+1);
	if (unlikely(err))
		WL_ERR(("Vendor Command reply failed ret:%d \n", err));
	else
		WL_INFO(("Vendor Command reply sent successfully!\n"));

	return err;
}

static const struct wiphy_vendor_command wl_vendor_cmds [] = {
	{
		{
			.vendor_id = OUI_BRCM,
			.subcmd = BRCM_VENDOR_SCMD_PRIV_STR
		},
		.flags = WIPHY_VENDOR_CMD_NEED_WDEV | WIPHY_VENDOR_CMD_NEED_NETDEV,
		.doit = wl_cfgvendor_priv_string_handler
	},
};

static const struct  nl80211_vendor_cmd_info wl_vendor_events [] = {
		{ OUI_BRCM, BRCM_VENDOR_EVENT_UNSPEC },
		{ OUI_BRCM, BRCM_VENDOR_EVENT_PRIV_STR },
};

int wl_cfgvendor_attach(struct wiphy *wiphy)
{

	WL_INFO(("Vendor: Register BRCM cfg80211 vendor cmd(0x%x) interface \n",
		NL80211_CMD_VENDOR));

	wiphy->vendor_commands	= wl_vendor_cmds;
	wiphy->n_vendor_commands = ARRAY_SIZE(wl_vendor_cmds);
	wiphy->vendor_events	= wl_vendor_events;
	wiphy->n_vendor_events	= ARRAY_SIZE(wl_vendor_events);

	return 0;
}

int wl_cfgvendor_detach(struct wiphy *wiphy)
{
	WL_INFO(("Vendor: Unregister BRCM cfg80211 vendor interface \n"));

	wiphy->vendor_commands  = NULL;
	wiphy->vendor_events    = NULL;
	wiphy->n_vendor_commands = 0;
	wiphy->n_vendor_events  = 0;

	return 0;
}
#endif /* (LINUX_VERSION_CODE > KERNEL_VERSION(3, 13, 0)) || defined(WL_VENDOR_EXT_SUPPORT) */