[PATCH] wpa_supplicant: Resolve secondary VAP association issue

[Cy Schubert]

Association will fail on a secondary open unprotected VAP when the
primary VAP is configured for WPA. Examples of secondary VAPs are,
hotels, universities, and commodity routers' guest networks.

A broadly similar bug was discussed on Red Hat's bugzilla affecting
association to a D-Link DIR-842.

This suggests that as IEs were added to the 802.11 protocol the old code
was increasingly inadaquate to handle the additional IEs, not only a
secondary VAP.

FreeBSD PR:		264238
Reported by:		Jaskie <jiangjun12321 at gmail.com>

Signed-off-by:	"J.R. Oldroyd" <fbsd at opal.com>
---
 src/drivers/driver_bsd.c | 65 +++++++++++++++++++++++++++++-----------
 1 file changed, 48 insertions(+), 17 deletions(-)

diff --git a/src/drivers/driver_bsd.c b/src/drivers/driver_bsd.c
index 00d970a6d..f469651e4 100644
--- a/src/drivers/driver_bsd.c
+++ b/src/drivers/driver_bsd.c
@@ -14,6 +14,7 @@
 #include "driver.h"
 #include "eloop.h"
 #include "common/ieee802_11_defs.h"
+#include "common/ieee802_11_common.h"
 #include "common/wpa_common.h"
 
 #include <ifaddrs.h>
@@ -1196,14 +1197,42 @@ handle_read(void *ctx, const u8 *src_addr, const u8 
*buf, size_t len)
 	drv_event_eapol_rx(drv->ctx, src_addr, buf, len);
 }
 
+static int
+wpa_driver_bsd_set_rsn_wpa_ie(struct bsd_driver_data * drv,
+    struct wpa_driver_associate_params *params, const u8 *ie)
+{
+	int privacy;
+	size_t ie_len = ie[1] ? ie[1] + 2 : 0;
+
+	/* XXX error handling is wrong but unclear what to do... */
+	if (wpa_driver_bsd_set_wpa_ie(drv, ie, ie_len) < 0)
+		return -1;
+
+	privacy = !(params->pairwise_suite == WPA_CIPHER_NONE &&
+	    params->group_suite == WPA_CIPHER_NONE &&
+	    params->key_mgmt_suite == WPA_KEY_MGMT_NONE);
+	wpa_printf(MSG_DEBUG, "%s: set PRIVACY %u", __func__,
+	    privacy);
+
+	if (set80211param(drv, IEEE80211_IOC_PRIVACY, privacy) < 0)
+		return -1;
+
+	if (ie_len &&
+	    set80211param(drv, IEEE80211_IOC_WPA,
+	    ie[0] == WLAN_EID_RSN ? 2 : 1) < 0)
+		return -1;
+
+	return 0;
+}
+
 static int
 wpa_driver_bsd_associate(void *priv, struct wpa_driver_associate_params 
*params)
 {
 	struct bsd_driver_data *drv = priv;
 	struct ieee80211req_mlme mlme;
 	u32 mode;
-	int privacy;
 	int ret = 0;
+	const u8 *wpa_ie, *rsn_ie;
 
 	wpa_printf(MSG_DEBUG,
 		"%s: ssid '%.*s' wpa ie len %u pairwise %u group %u key mgmt %u"
@@ -1249,23 +1278,25 @@ wpa_driver_bsd_associate(void *priv, struct 
wpa_driver_associate_params *params)
 		ret = -1;
 	if (wpa_driver_bsd_set_auth_alg(drv, params->auth_alg) < 0)
 		ret = -1;
-	/* XXX error handling is wrong but unclear what to do... */
-	if (wpa_driver_bsd_set_wpa_ie(drv, params->wpa_ie, params->wpa_ie_len) < 
0)
-		return -1;
 
-	privacy = !(params->pairwise_suite == WPA_CIPHER_NONE &&
-	    params->group_suite == WPA_CIPHER_NONE &&
-	    params->key_mgmt_suite == WPA_KEY_MGMT_NONE &&
-	    params->wpa_ie_len == 0);
-	wpa_printf(MSG_DEBUG, "%s: set PRIVACY %u", __func__, privacy);
-
-	if (set80211param(drv, IEEE80211_IOC_PRIVACY, privacy) < 0)
-		return -1;
-
-	if (params->wpa_ie_len &&
-	    set80211param(drv, IEEE80211_IOC_WPA,
-			  params->wpa_ie[0] == WLAN_EID_RSN ? 2 : 1) < 0)
-		return -1;
+	if (params->wpa_ie_len) {
+		rsn_ie = get_ie(params->wpa_ie, params->wpa_ie_len,
+		    WLAN_EID_RSN);
+		if (rsn_ie) {
+			if (wpa_driver_bsd_set_rsn_wpa_ie(drv, params,
+			    rsn_ie) < 0)
+				return -1;
+		}
+		else {
+			wpa_ie = get_vendor_ie(params->wpa_ie,
+			    params->wpa_ie_len, WPA_IE_VENDOR_TYPE);
+			if (wpa_ie) {
+				if (wpa_driver_bsd_set_rsn_wpa_ie(drv, params,
+				    wpa_ie) < 0)
+					return -1;
+			}
+		}
+	}
 
 	os_memset(&mlme, 0, sizeof(mlme));
 	mlme.im_op = IEEE80211_MLME_ASSOC;
-- 
2.37.0


-- 
Cheers,
Cy Schubert <Cy.Schubert at cschubert.com>
FreeBSD UNIX:  <cy at FreeBSD.org>   Web:  http://www.FreeBSD.org
NTP:           <cy at nwtime.org>    Web:  https://nwtime.org

			e**(i*pi)+1=0