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iwd
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network: add 6GHz restrictions to network_can_connect_bss 

The 802.11ax standards adds some restrictions for the 6GHz band. In short
stations must use SAE, OWE, or 8021x on this band and frame protection is
required.
This commit is contained in:
James Prestwood 2022-02-25 17:06:39 -08:00 committed by Denis Kenzior
parent 1024384ffd
commit d38b7f2406
1 changed files with 46 additions and 14 deletions
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60
src/network.c
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@ -55,6 +55,7 @@
#include "src/util.h"
#include "src/erp.h"
#include "src/handshake.h"
#include "src/band.h"
#define SAE_PT_SETTING "SAE-PT-Group%u"
@ -774,6 +775,7 @@ int network_can_connect_bss(struct network *network, const struct scan_bss *bss)
struct network_config *config = info ? &info->config : NULL;
bool can_transition_disable = wiphy_can_transition_disable(wiphy);
struct ie_rsn_info rsn;
enum band_freq band;
int ret;
switch (security) {
@ -785,6 +787,9 @@ int network_can_connect_bss(struct network *network, const struct scan_bss *bss)
return -ENOSYS;
}
if (!band_freq_to_channel(bss->frequency, &band))
return -ENOTSUP;
memset(&rsn, 0, sizeof(rsn));
ret = scan_bss_get_rsn_info(bss, &rsn);
if (ret < 0) {
@ -797,6 +802,13 @@ int network_can_connect_bss(struct network *network, const struct scan_bss *bss)
* We assume the spec means us to check bit 3 here
*/
if (ret == -ENOENT && security == SECURITY_NONE) {
/*
* 802.11ax 12.12.2 - STA shall not use Open System
* authentication without encryption
*/
if (band == BAND_FREQ_6_GHZ)
return -EPERM;
if (!config)
return 0;
@ -814,25 +826,20 @@ int network_can_connect_bss(struct network *network, const struct scan_bss *bss)
return ret;
}
if (!config || !config->have_transition_disable)
goto no_transition_disable;
if (!config || !config->have_transition_disable) {
if (band == BAND_FREQ_6_GHZ)
goto mfp_no_tkip;
if (!can_transition_disable) {
l_debug("HW not capable of Transition Disable, skip");
goto no_transition_disable;
}
/*
* WPA3 Specification, v3, Section 8:
* - Disable use of WEP and TKIP
* - Disallow association without negotiation of PMF
*/
rsn.pairwise_ciphers &= ~IE_RSN_CIPHER_SUITE_TKIP;
if (!can_transition_disable) {
if (band == BAND_FREQ_6_GHZ)
return -EPERM;
if (!rsn.group_management_cipher)
return -EPERM;
rsn.mfpr = true;
l_debug("HW not capable of Transition Disable, skip");
goto no_transition_disable;
}
/* WPA3-Personal */
if (test_bit(&config->transition_disable, 0)) {
@ -851,6 +858,31 @@ int network_can_connect_bss(struct network *network, const struct scan_bss *bss)
return -EPERM;
}
mfp_no_tkip:
/*
* WPA3 Specification, v3, Section 8:
* - Disable use of WEP and TKIP
* - Disallow association without negotiation of PMF
*/
rsn.pairwise_ciphers &= ~IE_RSN_CIPHER_SUITE_TKIP;
if (!rsn.group_management_cipher)
return -EPERM;
rsn.mfpr = true;
/* 802.11ax Section 12.12.2 */
if (band == BAND_FREQ_6_GHZ) {
/* STA shall not use the following cipher suite selectors */
rsn.pairwise_ciphers &= ~IE_RSN_CIPHER_SUITE_USE_GROUP_CIPHER;
/* Basically the STA must use OWE, SAE, or 8021x */
if (!IE_AKM_IS_SAE(rsn.akm_suites) &&
!IE_AKM_IS_8021X(rsn.akm_suites) &&
(!(rsn.akm_suites & IE_RSN_AKM_SUITE_OWE)))
return -EPERM;
}
no_transition_disable:
if (!wiphy_select_cipher(wiphy, rsn.pairwise_ciphers))
return -ENOTSUP;