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FT: Fix hostapd_wpa_auth_oui_iter() iteration for multicast packets

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When using FT wildcard feature, the inter-AP protocol will send
broadcast messages to discover related APs.

For example,
12/6 16:24:43 FT: Send PMK-R1 pull request to remote R0KH address
    ff:ff:ff:ff:ff:ff
12/6 16:24:43 FT: Send out sequence number request to
    ff:ff:ff:ff:ff:ff

If you have multiple interfaces/BSSs in a single hostapd process,
hostapd_wpa_auth_oui_iter() returned 1 after the first interface was
processed. Iteration in for_each_interface() will be stopped since it
gets a non-zero return value from hostapd_wpa_auth_oui_iter().

Even worse, the packet will not be sent to ethernet because
for_each_interface() returns non-zero value. hostapd_wpa_auth_send_oui()
will then return data_len immediately.

To prevent this, hostapd_wpa_auth_oui_iter() should not return 1 after
any successful transmission to other interfaces, if the dst_addr of
packet is a multicast address.

Signed-off-by: Jinglin Wang <bryanwang@synology.com>
Signed-off-by: MinHong Wang <minhongw@synology.com>
This commit is contained in:
Jinglin Wang 2019-12-13 16:30:27 +08:00 committed by Jouni Malinen
parent 18780c6d67
commit 4834c6869d
1 changed files with 5 additions and 1 deletions
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4
src/ap/wpa_auth_glue.c
View file

@ -748,6 +748,10 @@ static int hostapd_wpa_auth_oui_iter(struct hostapd_iface *iface, void *ctx)
hostapd_oui_deliver_later,
hapd, NULL);
/* If dst_addr is a multicast address, do not return any
* non-zero value here. Otherwise, the iteration of
* for_each_interface() will be stopped. */
if (!is_multicast_ether_addr(idata->dst_addr))
return 1;
}