net/hostapd-devel: driver_bsd.c: backout upstream IFF_ change and add…

… logging

This reverts the state to our old supplicant logic setting or clearing
IFF_UP if needed.  In addition this adds logging for the cases in which
we do (not) change the interface state.

Depending on testing this seems to help bringing WiFi up or not log
any needed changes (which would be the expected wpa_supplicant logic
now).  People should look out for ``(changed)`` log entries (at least
if debugging the issue; this way we will at least have data points).

There is a hypothesis still pondered that the entire IFF_UP toggling
only exploits a race in net80211 (see further discssussions for more
debugging and alternative solutions see D38508 and D38753).
That may also explain why the changes to the rc startup script [1]
only helped partially for some people to no longer see the
continuous CTRL-EVENT-SCAN-FAILED.

It is highly likely that we will want further changes and until
we know for sure that people are seeing ''(changed)'' events
this should stay local.  Should we need to upstream this we'll
likely need #ifdef __FreeBSD__ around this code.

PR:		273696
Obtained from:	src bfb202c4554a
MFH:		2023Q3

net/hostapd-devel/Makefile

@@ -1,5 +1,6 @@
 PORTNAME=	hostapd
 PORTVERSION=	${COMMIT_DATE}
+PORTREVISION=	1
 CATEGORIES=	net
 PKGNAMESUFFIX=	-devel
 

net/hostapd-devel/files/patch-src_drivers_driver__bsd.c

@@ -1,5 +1,5 @@
---- src/drivers/driver_bsd.c.orig	2022-06-20 04:39:26.000000000 -0700
-+++ src/drivers/driver_bsd.c	2022-07-03 14:14:25.865828000 -0700
+--- src/drivers/driver_bsd.c.orig	2023-09-05 10:38:47.000000000 -0700
++++ src/drivers/driver_bsd.c	2023-09-10 23:12:00.594370000 -0700
 @@ -14,6 +14,7 @@
  #include "driver.h"
  #include "eloop.h"
@@ -8,7 +8,62 @@
  #include "common/wpa_common.h"
 
  #include <ifaddrs.h>
-@@ -853,14 +854,18 @@
+@@ -293,8 +294,9 @@
+ }
+
+ static int
+-bsd_get_iface_flags(struct bsd_driver_data *drv)
++bsd_ctrl_iface(void *priv, int enable)
+ {
++	struct bsd_driver_data *drv = priv;
+ 	struct ifreq ifr;
+
+ 	os_memset(&ifr, 0, sizeof(ifr));
+@@ -306,7 +308,34 @@
+ 		return -1;
+ 	}
+ 	drv->flags = ifr.ifr_flags;
++
++
++	if (enable) {
++		if (ifr.ifr_flags & IFF_UP)
++			goto nochange;
++		ifr.ifr_flags |= IFF_UP;
++	} else {
++		if (!(ifr.ifr_flags & IFF_UP))
++			goto nochange;
++		ifr.ifr_flags &= ~IFF_UP;
++	}
++
++	if (ioctl(drv->global->sock, SIOCSIFFLAGS, &ifr) < 0) {
++		wpa_printf(MSG_ERROR, "ioctl[SIOCSIFFLAGS]: %s",
++			   strerror(errno));
++		return -1;
++	}
++
++	wpa_printf(MSG_DEBUG, "%s: if %s (changed) enable %d IFF_UP %d ",
++	    __func__, drv->ifname, enable, ((ifr.ifr_flags & IFF_UP) != 0));
++
++	drv->flags = ifr.ifr_flags;
+ 	return 0;
++
++nochange:
++	wpa_printf(MSG_DEBUG, "%s: if %s (no change) enable %d IFF_UP %d ",
++	    __func__, drv->ifname, enable, ((ifr.ifr_flags & IFF_UP) != 0));
++	return 0;
+ }
+
+ static int
+@@ -525,7 +554,7 @@
+ 			   __func__);
+ 		return -1;
+ 	}
+-	return 0;
++	return bsd_ctrl_iface(priv, 1);
+ }
+
+ static void
+@@ -853,14 +882,18 @@
  		drv = bsd_get_drvindex(global, ifm->ifm_index);
  		if (drv == NULL)
  			return;
@@ -30,7 +85,32 @@
  			wpa_printf(MSG_DEBUG, "RTM_IFINFO: Interface '%s' UP",
  				   drv->ifname);
  			wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED,
-@@ -1197,13 +1202,41 @@
+@@ -1027,7 +1060,8 @@
+ 	if (l2_packet_get_own_addr(drv->sock_xmit, params->own_addr))
+ 		goto bad;
+
+-	if (bsd_get_iface_flags(drv) < 0)
++	/* mark down during setup */
++	if (bsd_ctrl_iface(drv, 0) < 0)
+ 		goto bad;
+
+ 	if (bsd_set_mediaopt(drv, IFM_OMASK, IFM_IEEE80211_HOSTAP) < 0) {
+@@ -1052,12 +1086,13 @@
+ {
+ 	struct bsd_driver_data *drv = priv;
+
++	if (drv->ifindex != 0)
++		bsd_ctrl_iface(drv, 0);
+ 	if (drv->sock_xmit != NULL)
+ 		l2_packet_deinit(drv->sock_xmit);
+ 	os_free(drv);
+ }
+
+-
+ static int
+ bsd_set_sta_authorized(void *priv, const u8 *addr,
+ 		       unsigned int total_flags, unsigned int flags_or,
+@@ -1199,13 +1234,41 @@
  }
 
  static int
@@ -73,7 +153,7 @@
 
  	wpa_printf(MSG_DEBUG,
  		"%s: ssid '%.*s' wpa ie len %u pairwise %u group %u key mgmt %u"
-@@ -1220,7 +1253,10 @@
+@@ -1222,7 +1285,10 @@
  		mode = 0 /* STA */;
  		break;
  	case IEEE80211_MODE_IBSS:
@@ -84,7 +164,7 @@
  		break;
  	case IEEE80211_MODE_AP:
  		mode = IFM_IEEE80211_HOSTAP;
-@@ -1249,24 +1285,33 @@
+@@ -1251,24 +1317,33 @@
  		ret = -1;
  	if (wpa_driver_bsd_set_auth_alg(drv, params->auth_alg) < 0)
  		ret = -1;
@@ -121,7 +201,7 @@
 +	 * NB: interface must be marked UP for association
 +	 * or scanning (ap_scan=2)
 +	 */
-+	if (bsd_get_iface_flags(drv) < 0)
++	if (bsd_ctrl_iface(drv, 1) < 0)
  		return -1;
 
 -	if (params->wpa_ie_len &&
@@ -132,7 +212,20 @@
  	os_memset(&mlme, 0, sizeof(mlme));
  	mlme.im_op = IEEE80211_MLME_ASSOC;
  	if (params->ssid != NULL)
-@@ -1485,6 +1530,17 @@
+@@ -1311,11 +1386,8 @@
+ 	}
+
+ 	/* NB: interface must be marked UP to do a scan */
+-	if (!(drv->flags & IFF_UP)) {
+-		wpa_printf(MSG_DEBUG, "%s: interface is not up, cannot scan",
+-			   __func__);
++	if (bsd_ctrl_iface(drv, 1) < 0)
+ 		return -1;
+-	}
+
+ #ifdef IEEE80211_IOC_SCAN_MAX_SSID
+ 	os_memset(&sr, 0, sizeof(sr));
+@@ -1487,6 +1559,17 @@
  	if (devcaps.dc_drivercaps & IEEE80211_C_WPA2)
  		drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
  			WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
@@ -150,15 +243,15 @@
 
  	if (devcaps.dc_cryptocaps & IEEE80211_CRYPTO_WEP)
  		drv->capa.enc |= WPA_DRIVER_CAPA_ENC_WEP40 |
-@@ -1493,6 +1549,7 @@
+@@ -1495,6 +1578,7 @@
  		drv->capa.enc |= WPA_DRIVER_CAPA_ENC_TKIP;
  	if (devcaps.dc_cryptocaps & IEEE80211_CRYPTO_AES_CCM)
  		drv->capa.enc |= WPA_DRIVER_CAPA_ENC_CCMP;
 +#endif
 
  	if (devcaps.dc_drivercaps & IEEE80211_C_HOSTAP)
  		drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
-@@ -1545,6 +1602,8 @@
+@@ -1547,6 +1631,8 @@
  		}
  		if (ifmr.ifm_current & IFM_IEEE80211_HOSTAP)
  			return IEEE80211_M_HOSTAP;
@@ -167,3 +260,22 @@
  		if (ifmr.ifm_current & IFM_IEEE80211_MONITOR)
  			return IEEE80211_M_MONITOR;
  #ifdef IEEE80211_M_MBSS
+@@ -1607,7 +1693,7 @@
+ 		drv->capa.key_mgmt_iftype[i] = drv->capa.key_mgmt;
+
+ 	/* Down interface during setup. */
+-	if (bsd_get_iface_flags(drv) < 0)
++	if (bsd_ctrl_iface(drv, 0) < 0)
+ 		goto fail;
+
+ 	/* Proven to work, lets go! */
+@@ -1630,6 +1716,9 @@
+
+ 	if (drv->ifindex != 0 && !drv->if_removed) {
+ 		wpa_driver_bsd_set_wpa(drv, 0);
++
++		/* NB: mark interface down */
++		bsd_ctrl_iface(drv, 0);
+
+ 		wpa_driver_bsd_set_wpa_internal(drv, drv->prev_wpa,
+ 						drv->prev_privacy);