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WPS: Add a workaround for auth/encr type flags mismatches

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Some deployed implementations seem to advertise incorrect information
in this attribute. For example, Linksys WRT350N seems to have a
byteorder bug that breaks this negotiation. In order to interoperate
with existing implementations, assume that the Enrollee supports
everything we do.
This commit is contained in:
Jouni Malinen 2009-05-06 10:56:18 +03:00 committed by Jouni Malinen
parent 077ed46d2b
commit 826fff182f
1 changed files with 31 additions and 1 deletions
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32
src/wps/wps_registrar.c
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@ -24,6 +24,7 @@
#include "wps_upnp.h" #include "wps_upnp.h"
#include "crypto.h" #include "crypto.h"
#define WPS_WORKAROUNDS
struct wps_uuid_pin { struct wps_uuid_pin {
struct wps_uuid_pin *next; struct wps_uuid_pin *next;
@ -1695,7 +1696,21 @@ static int wps_process_auth_type_flags(struct wps_data *wps, const u8 *auth)
wpa_printf(MSG_DEBUG, "WPS: No match in supported " wpa_printf(MSG_DEBUG, "WPS: No match in supported "
"authentication types (own 0x%x Enrollee 0x%x)", "authentication types (own 0x%x Enrollee 0x%x)",
wps->wps->auth_types, auth_types); wps->wps->auth_types, auth_types);
#ifdef WPS_WORKAROUNDS
/*
* Some deployed implementations seem to advertise incorrect
* information in this attribute. For example, Linksys WRT350N
* seems to have a byteorder bug that breaks this negotiation.
* In order to interoperate with existing implementations,
* assume that the Enrollee supports everything we do.
*/
wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
"does not advertise supported authentication types "
"correctly");
wps->auth_type = wps->wps->auth_types;
#else /* WPS_WORKAROUNDS */
return -1; return -1;
#endif /* WPS_WORKAROUNDS */
} }
return 0; return 0;
@ -1719,8 +1734,23 @@ static int wps_process_encr_type_flags(struct wps_data *wps, const u8 *encr)
wps->encr_type = wps->wps->encr_types & encr_types; wps->encr_type = wps->wps->encr_types & encr_types;
if (wps->encr_type == 0) { if (wps->encr_type == 0) {
wpa_printf(MSG_DEBUG, "WPS: No match in supported " wpa_printf(MSG_DEBUG, "WPS: No match in supported "
"encryption types"); "encryption types (own 0x%x Enrollee 0x%x)",
wps->wps->encr_types, encr_types);
#ifdef WPS_WORKAROUNDS
/*
* Some deployed implementations seem to advertise incorrect
* information in this attribute. For example, Linksys WRT350N
* seems to have a byteorder bug that breaks this negotiation.
* In order to interoperate with existing implementations,
* assume that the Enrollee supports everything we do.
*/
wpa_printf(MSG_DEBUG, "WPS: Workaround - assume Enrollee "
"does not advertise supported encryption types "
"correctly");
wps->encr_type = wps->wps->encr_types;
#else /* WPS_WORKAROUNDS */
return -1; return -1;
#endif /* WPS_WORKAROUNDS */
} }
return 0; return 0;