xref: /hardware/broadcom/wlan/bcmdhd/wpa_supplicant_8_lib/driver_cmd_nl80211.c

/*
 * Driver interaction with extended Linux CFG8021
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 */

#include "driver_nl80211.h"

#define WPA_EVENT_DRIVER_STATE	"CTRL-EVENT-DRIVER-STATE "

#define WPA_PS_ENABLED		0
#define WPA_PS_DISABLED		1

typedef struct android_wifi_priv_cmd {
	char *buf;
	int used_len;
	int total_len;
} android_wifi_priv_cmd;

int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv, struct nl_msg *msg,
		       int (*valid_handler)(struct nl_msg *, void *),
		       void *valid_data);

static int wpa_driver_set_btcoex_state(char state)
{
	int ret;
	int fd;

	fd = open("/sys/devices/platform/bcmdhd/bt_coex_state", O_RDWR, 0);
	if (fd == -1)
		return -1;

	ret = write(fd, &state, sizeof(state));
	close(fd);

	wpa_printf(MSG_DEBUG, "%s: set btcoex state to '%c' result = %d",
		__func__, state, ret);
	return (ret > 0) ? 0 : -1;
}

static int wpa_driver_set_power_save(void *priv, int state)
{
	struct i802_bss *bss = priv;
	struct wpa_driver_nl80211_data *drv = bss->drv;
	struct nl_msg *msg;
	int ret = -1;
	enum nl80211_ps_state ps_state;

	msg = nlmsg_alloc();
	if (!msg)
		return -1;

	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
		    NL80211_CMD_SET_POWER_SAVE, 0);

	if (state == WPA_PS_ENABLED)
		ps_state = NL80211_PS_ENABLED;
	else
		ps_state = NL80211_PS_DISABLED;

	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
	NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);

	ret = send_and_recv_msgs(drv, msg, NULL, NULL);
	msg = NULL;
	if (ret < 0)
		wpa_printf(MSG_ERROR, "nl80211: Set power mode fail: %d", ret);
nla_put_failure:
	nlmsg_free(msg);
	return ret;
}

static int get_power_mode_handler(struct nl_msg *msg, void *arg)
{
	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	int *state = (int *)arg;

	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);

	if (!tb[NL80211_ATTR_PS_STATE])
		return NL_SKIP;

	if (state) {
		*state = (int)nla_get_u32(tb[NL80211_ATTR_PS_STATE]);
		wpa_printf(MSG_DEBUG, "nl80211: Get power mode = %d", *state);
		*state = (*state == NL80211_PS_ENABLED) ?
				WPA_PS_ENABLED : WPA_PS_DISABLED;
	}

	return NL_SKIP;
}

static int wpa_driver_get_power_save(void *priv, int *state)
{
	struct i802_bss *bss = priv;
	struct wpa_driver_nl80211_data *drv = bss->drv;
	struct nl_msg *msg;
	int ret = -1;
	enum nl80211_ps_state ps_state;

	msg = nlmsg_alloc();
	if (!msg)
		return -1;

	genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
		    NL80211_CMD_GET_POWER_SAVE, 0);

	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);

	ret = send_and_recv_msgs(drv, msg, get_power_mode_handler, state);
	msg = NULL;
	if (ret < 0)
		wpa_printf(MSG_ERROR, "nl80211: Get power mode fail: %d", ret);
nla_put_failure:
	nlmsg_free(msg);
	return ret;
}

int wpa_driver_nl80211_driver_cmd(void *priv, char *cmd, char *buf,
				  size_t buf_len )
{
	struct i802_bss *bss = priv;
	struct wpa_driver_nl80211_data *drv = bss->drv;
	struct ifreq ifr;
	android_wifi_priv_cmd priv_cmd;
	int ret = 0;

	wpa_msg(drv->ctx, MSG_INFO, "%s: %s", __func__, cmd);

	if (os_strcasecmp(cmd, "STOP") == 0) {
		linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
		wpa_msg(drv->ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "STOPPED");
	} else if (os_strcasecmp(cmd, "START") == 0) {
		linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1);
		wpa_msg(drv->ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "STARTED");
	} else if (os_strcasecmp(cmd, "MACADDR") == 0) {
		u8 macaddr[ETH_ALEN] = {};

		ret = linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, macaddr);
		if (!ret)
			ret = os_snprintf(buf, buf_len,
					  "Macaddr = " MACSTR "\n", MAC2STR(macaddr));
	} else if (os_strcasecmp(cmd, "RELOAD") == 0) {
		wpa_msg(drv->ctx, MSG_INFO, WPA_EVENT_DRIVER_STATE "HANGED");
	} else if (os_strncasecmp(cmd, "POWERMODE ", 10) == 0) {
		int state;

		state = atoi(cmd + 10);
		ret = wpa_driver_set_power_save(priv, state);
	} else if (os_strncasecmp(cmd, "GETPOWER", 8) == 0) {
		int state = -1;

		ret = wpa_driver_get_power_save(priv, &state);
		if (!ret && (state != -1))
			ret = os_snprintf(buf, buf_len, "POWERMODE = %d\n", state);
	} else if (os_strncasecmp(cmd, "BTCOEXMODE ", 11) == 0) {
		char state = cmd[11];

		ret = wpa_driver_set_btcoex_state(state);
	} else { /* Use private command */
		memset(&ifr, 0, sizeof(ifr));
		memset(&priv_cmd, 0, sizeof(priv_cmd));
		os_memcpy(buf, cmd, strlen(cmd) + 1);
		os_strncpy(&ifr.ifr_name, bss->ifname, IFNAMSIZ);

		priv_cmd.buf = buf;
		priv_cmd.used_len = buf_len;
		priv_cmd.total_len = buf_len;
		ifr.ifr_data = &priv_cmd;

		if ((ret = ioctl(drv->ioctl_sock, SIOCDEVPRIVATE + 1, &ifr)) < 0)
			wpa_printf(MSG_ERROR, "%s: failed to issue private commands\n", __func__);
		else {
			ret = 0;
			if ((os_strcasecmp(cmd, "LINKSPEED") == 0) ||
			    (os_strcasecmp(cmd, "RSSI") == 0))
				ret = strlen(buf);

			wpa_printf(MSG_DEBUG, "%s %s len = %d, %d", __func__, buf, ret, strlen(buf));
		}
	}

	return ret;
}