bsd: Enable auto configuration

On NetBSD, we should configure some parameters manually out of hostapd
like below.

  ifconfig ath0 mediaopt hostap
  ifconfig ath0 mode 11g
  ifconfig ath0 chan 6

This patch does these automatically. Maybe there will be some
objections, like "hardware configuration is not hostapd/wpa_supplican's
work". So I will write the reasons why I made this patch.

1. For usability.
2. The first command fails when previous state is adhoc. This patch is
free from previous state.
3. Some driver wrappers configure these automatically (like nl80211).
4. I have wasted time trying to find out these command were needed :(

src/drivers/driver_bsd.c

@@ -22,6 +22,7 @@
 #include "common/ieee802_11_defs.h"
 
 #include <net/if.h>
+#include <net/if_media.h>
 
 #ifdef __NetBSD__
 #include <net/if_ether.h>
@@ -142,6 +143,55 @@ bsd_set_ssid(int s, const char *ifname, const u8 *ssid, size_t ssid_len)
 #endif
 }
 
+static int
+bsd_get_if_media(int s, const char *ifname)
+{
+	struct ifmediareq ifmr;
+
+	os_memset(&ifmr, 0, sizeof(ifmr));
+	os_strlcpy(ifmr.ifm_name, ifname, sizeof(ifmr.ifm_name));
+
+	if (ioctl(s, SIOCGIFMEDIA, &ifmr) < 0) {
+		wpa_printf(MSG_ERROR, "%s: SIOCGIFMEDIA %s", __func__,
+			   strerror(errno));
+		return -1;
+	}
+
+	return ifmr.ifm_current;
+}
+
+static int
+bsd_set_if_media(int s, const char *ifname, int media)
+{
+	struct ifreq ifr;
+
+	os_memset(&ifr, 0, sizeof(ifr));
+	os_strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
+	ifr.ifr_media = media;
+
+	if (ioctl(s, SIOCSIFMEDIA, &ifr) < 0) {
+		wpa_printf(MSG_ERROR, "%s: SIOCSIFMEDIA %s", __func__,
+			   strerror(errno));
+		return -1;
+	}
+
+	return 0;
+}
+
+static int
+bsd_set_mediaopt(int s, const char *ifname, uint32_t mask, uint32_t mode)
+{
+	int media = bsd_get_if_media(s, ifname);
+
+	if (media < 0)
+		return -1;
+	media &= ~mask;
+	media |= mode;
+	if (bsd_set_if_media(s, ifname, media) < 0)
+		return -1;
+	return 0;
+}
+
 
 #ifdef HOSTAPD
 
@@ -758,6 +808,32 @@ hostapd_bsd_set_ssid(const char *ifname, void *priv, const u8 *buf, int len)
 	return bsd_set_ssid(drv->ioctl_sock, drv->iface, buf, len);
 }
 
+static int
+bsd_set_freq(void *priv, struct hostapd_freq_params *freq)
+{
+	struct bsd_driver_data *drv = priv;
+	struct ieee80211chanreq creq;
+	uint32_t mode;
+
+	if (freq->channel < 14)
+		mode = IFM_IEEE80211_11G;
+	else if (freq->channel == 14)
+		mode = IFM_IEEE80211_11B;
+	else
+		mode = IFM_IEEE80211_11A;
+	if (bsd_set_mediaopt(drv->ioctl_sock, drv->iface, IFM_MMASK,
+			     mode) < 0) {
+		wpa_printf(MSG_ERROR, "%s: failed to set modulation mode",
+			   __func__);
+		return -1;
+	}
+
+	os_memset(&creq, 0, sizeof(creq));
+	os_strlcpy(creq.i_name, drv->iface, sizeof(creq.i_name));
+	creq.i_channel = freq->channel;
+	return ioctl(drv->ioctl_sock, SIOCS80211CHANNEL, &creq);
+}
+
 static void *
 bsd_init(struct hostapd_data *hapd, struct wpa_init_params *params)
 {
@@ -788,6 +864,13 @@ bsd_init(struct hostapd_data *hapd, struct wpa_init_params *params)
 	if (bsd_wireless_event_init(drv))
 		goto bad;
 
+	if (bsd_set_mediaopt(drv->ioctl_sock, drv->iface, IFM_OMASK,
+			     IFM_IEEE80211_HOSTAP) < 0) {
+		wpa_printf(MSG_ERROR, "%s: failed to set operation mode",
+			   __func__);
+		goto bad;
+	}
+
 	return drv;
 bad:
 	if (drv->sock_xmit != NULL)
@@ -831,6 +914,7 @@ const struct wpa_driver_ops wpa_driver_bsd_ops = {
 	.sta_deauth		= bsd_sta_deauth,
 	.hapd_set_ssid		= hostapd_bsd_set_ssid,
 	.hapd_get_ssid		= hostapd_bsd_get_ssid,
+	.set_freq		= bsd_set_freq,
 };
 
 #else /* HOSTAPD */
@@ -1465,6 +1549,13 @@ wpa_driver_bsd_init(void *ctx, const char *ifname)
 			__func__, strerror(errno));
 		goto fail;
 	}
+
+	if (bsd_set_mediaopt(drv->sock, drv->ifname, IFM_OMASK,
+			     0 /* STA */) < 0) {
+		wpa_printf(MSG_ERROR, "%s: failed to set operation mode",
+			   __func__);
+		goto fail;
+	}
 	if (set80211param(drv, IEEE80211_IOC_ROAMING, IEEE80211_ROAMING_MANUAL) < 0) {
 		wpa_printf(MSG_DEBUG, "%s: failed to set wpa_supplicant-based "
 			   "roaming: %s", __func__, strerror(errno));