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Just a couple of more things over the holidays:

Browse Source 
- first kunit tests for both cfg80211 and mac80211
  - a few multi-link fixes
  - DSCP mapping update
  - RCU fix
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Merge tag 'wireless-next-2024-01-03' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next

Johannes Berg says:

====================
Just a couple of more things over the holidays:

 - first kunit tests for both cfg80211 and mac80211
 - a few multi-link fixes
 - DSCP mapping update
 - RCU fix

* tag 'wireless-next-2024-01-03' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next:
  wifi: mac80211: remove redundant ML element check
  wifi: cfg80211: parse all ML elements in an ML probe response
  wifi: cfg80211: correct comment about MLD ID
  wifi: cfg80211: Update the default DSCP-to-UP mapping
  wifi: cfg80211: tests: add some scanning related tests
  wifi: mac80211: kunit: extend MFP tests
  wifi: mac80211: kunit: generalize public action test
  wifi: mac80211: add kunit tests for public action handling
  kunit: add a convenience allocation wrapper for SKBs
  kunit: add parameter generation macro using description from array
  wifi: mac80211: fix spelling typo in comment
  wifi: cfg80211: fix RCU dereference in __cfg80211_bss_update
====================

Link: https://lore.kernel.org/r/20240103144423.52269-3-johannes@sipsolutions.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2024-01-04 17:00:07 -08:00
commit a180b0b1a6
16 changed files with 1244 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Documentation/dev-tools/kunit/usage.rst
View File

@ -566,13 +566,9 @@ By reusing the same ``cases`` array from above, we can write the test as a
},
};
// Need a helper function to generate a name for each test case.
static void case_to_desc(const struct sha1_test_case *t, char *desc)
{
strcpy(desc, t->str);
}
// Creates `sha1_gen_params()` to iterate over `cases`.
KUNIT_ARRAY_PARAM(sha1, cases, case_to_desc);
// Creates `sha1_gen_params()` to iterate over `cases` while using
// the struct member `str` for the case description.
KUNIT_ARRAY_PARAM_DESC(sha1, cases, str);
// Looks no different from a normal test.
static void sha1_test(struct kunit *test)
@ -588,7 +584,7 @@ By reusing the same ``cases`` array from above, we can write the test as a
}
// Instead of KUNIT_CASE, we use KUNIT_CASE_PARAM and pass in the
// function declared by KUNIT_ARRAY_PARAM.
// function declared by KUNIT_ARRAY_PARAM or KUNIT_ARRAY_PARAM_DESC.
static struct kunit_case sha1_test_cases[] = {
KUNIT_CASE_PARAM(sha1_test, sha1_gen_params),
{}

56
include/kunit/skbuff.h Normal file
View File

@ -0,0 +1,56 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* KUnit resource management helpers for SKBs (skbuff).
*
* Copyright (C) 2023 Intel Corporation
*/
#ifndef _KUNIT_SKBUFF_H
#define _KUNIT_SKBUFF_H
#include <kunit/resource.h>
#include <linux/skbuff.h>
static void kunit_action_kfree_skb(void *p)
{
kfree_skb((struct sk_buff *)p);
}
/**
* kunit_zalloc_skb() - Allocate and initialize a resource managed skb.
* @test: The test case to which the skb belongs
* @len: size to allocate
*
* Allocate a new struct sk_buff with GFP_KERNEL, zero fill the give length
* and add it as a resource to the kunit test for automatic cleanup.
*
* Returns: newly allocated SKB, or %NULL on error
*/
static inline struct sk_buff *kunit_zalloc_skb(struct kunit *test, int len,
gfp_t gfp)
{
struct sk_buff *res = alloc_skb(len, GFP_KERNEL);
if (!res || skb_pad(res, len))
return NULL;
if (kunit_add_action_or_reset(test, kunit_action_kfree_skb, res))
return NULL;
return res;
}
/**
* kunit_kfree_skb() - Like kfree_skb except for allocations managed by KUnit.
* @test: The test case to which the resource belongs.
* @skb: The SKB to free.
*/
static inline void kunit_kfree_skb(struct kunit *test, struct sk_buff *skb)
{
if (!skb)
return;
kunit_release_action(test, kunit_action_kfree_skb, (void *)skb);
}
#endif /* _KUNIT_SKBUFF_H */

19
include/kunit/test.h
View File

@ -1514,6 +1514,25 @@ do { \
return NULL; \
}
/**
* KUNIT_ARRAY_PARAM_DESC() - Define test parameter generator from an array.
* @name: prefix for the test parameter generator function.
* @array: array of test parameters.
* @desc_member: structure member from array element to use as description
*
* Define function @name_gen_params which uses @array to generate parameters.
*/
#define KUNIT_ARRAY_PARAM_DESC(name, array, desc_member) \
static const void *name##_gen_params(const void *prev, char *desc) \
{ \
typeof((array)[0]) *__next = prev ? ((typeof(__next)) prev) + 1 : (array); \
if (__next - (array) < ARRAY_SIZE((array))) { \
strscpy(desc, __next->desc_member, KUNIT_PARAM_DESC_SIZE); \
return __next; \
} \
return NULL; \
}
// TODO(dlatypov@google.com): consider eventually migrating users to explicitly
// include resource.h themselves if they need it.
#include <kunit/resource.h>

2
net/mac80211/debugfs_sta.c
View File

@ -16,7 +16,7 @@
#include "sta_info.h"
#include "driver-ops.h"
/* sta attributtes */
/* sta attributes */
#define STA_READ(name, field, format_string) \
static ssize_t sta_ ##name## _read(struct file *file, \

10
net/mac80211/ieee80211_i.h
View File

@ -2608,4 +2608,14 @@ void ieee80211_check_wbrf_support(struct ieee80211_local *local);
void ieee80211_add_wbrf(struct ieee80211_local *local, struct cfg80211_chan_def *chandef);
void ieee80211_remove_wbrf(struct ieee80211_local *local, struct cfg80211_chan_def *chandef);
#if IS_ENABLED(CONFIG_MAC80211_KUNIT_TEST)
#define EXPORT_SYMBOL_IF_MAC80211_KUNIT(sym) EXPORT_SYMBOL_IF_KUNIT(sym)
#define VISIBLE_IF_MAC80211_KUNIT
ieee80211_rx_result
ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx);
#else
#define EXPORT_SYMBOL_IF_MAC80211_KUNIT(sym)
#define VISIBLE_IF_MAC80211_KUNIT static
#endif
#endif /* IEEE80211_I_H */

29
net/mac80211/mlme.c
View File

@ -5407,33 +5407,24 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
}
if (ieee80211_vif_is_mld(&sdata->vif)) {
struct ieee80211_mle_basic_common_info *common;
if (!elems->ml_basic) {
sdata_info(sdata,
"MLO association with %pM but no multi-link element in response!\n",
"MLO association with %pM but no (basic) multi-link element in response!\n",
assoc_data->ap_addr);
goto abandon_assoc;
}
if (le16_get_bits(elems->ml_basic->control,
IEEE80211_ML_CONTROL_TYPE) !=
IEEE80211_ML_CONTROL_TYPE_BASIC) {
common = (void *)elems->ml_basic->variable;
if (memcmp(assoc_data->ap_addr,
common->mld_mac_addr, ETH_ALEN)) {
sdata_info(sdata,
"bad multi-link element (control=0x%x)\n",
le16_to_cpu(elems->ml_basic->control));
"AP MLD MAC address mismatch: got %pM expected %pM\n",
common->mld_mac_addr,
assoc_data->ap_addr);
goto abandon_assoc;
} else {
struct ieee80211_mle_basic_common_info *common;
common = (void *)elems->ml_basic->variable;
if (memcmp(assoc_data->ap_addr,
common->mld_mac_addr, ETH_ALEN)) {
sdata_info(sdata,
"AP MLD MAC address mismatch: got %pM expected %pM\n",
common->mld_mac_addr,
assoc_data->ap_addr);
goto abandon_assoc;
}
}
}

4
net/mac80211/rx.c
View File

@ -19,6 +19,7 @@
#include <linux/export.h>
#include <linux/kcov.h>
#include <linux/bitops.h>
#include <kunit/visibility.h>
#include <net/mac80211.h>
#include <net/ieee80211_radiotap.h>
#include <asm/unaligned.h>
@ -2414,7 +2415,7 @@ static int ieee80211_drop_unencrypted(struct ieee80211_rx_data *rx, __le16 fc)
return 0;
}
static ieee80211_rx_result
VISIBLE_IF_MAC80211_KUNIT ieee80211_rx_result
ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx)
{
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
@ -2493,6 +2494,7 @@ ieee80211_drop_unencrypted_mgmt(struct ieee80211_rx_data *rx)
return RX_CONTINUE;
}
EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_drop_unencrypted_mgmt);
static ieee80211_rx_result
__ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control)

2
net/mac80211/tests/Makefile
View File

@ -1,3 +1,3 @@
mac80211-tests-y += module.o elems.o
mac80211-tests-y += module.o elems.o mfp.o
obj-$(CONFIG_MAC80211_KUNIT_TEST) += mac80211-tests.o

286
net/mac80211/tests/mfp.c Normal file
View File

@ -0,0 +1,286 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* KUnit tests for management frame acceptance
*
* Copyright (C) 2023 Intel Corporation
*/
#include <kunit/test.h>
#include <kunit/skbuff.h>
#include "../ieee80211_i.h"
#include "../sta_info.h"
MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);
static const struct mfp_test_case {
const char *desc;
bool sta, mfp, decrypted, unicast, assoc;
u8 category;
u8 stype;
u8 action;
ieee80211_rx_result result;
} accept_mfp_cases[] = {
/* regular public action */
{
.desc = "public action: accept unicast from unknown peer",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PUBLIC,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.unicast = true,
.result = RX_CONTINUE,
},
{
.desc = "public action: accept multicast from unknown peer",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PUBLIC,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.unicast = false,
.result = RX_CONTINUE,
},
{
.desc = "public action: accept unicast without MFP",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PUBLIC,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.unicast = true,
.sta = true,
.result = RX_CONTINUE,
},
{
.desc = "public action: accept multicast without MFP",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PUBLIC,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.unicast = false,
.sta = true,
.result = RX_CONTINUE,
},
{
.desc = "public action: drop unicast with MFP",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PUBLIC,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.unicast = true,
.sta = true,
.mfp = true,
.result = RX_DROP_U_UNPROT_UNICAST_PUB_ACTION,
},
{
.desc = "public action: accept multicast with MFP",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PUBLIC,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.unicast = false,
.sta = true,
.mfp = true,
.result = RX_CONTINUE,
},
/* protected dual of public action */
{
.desc = "protected dual: drop unicast from unknown peer",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.unicast = true,
.result = RX_DROP_U_UNPROT_DUAL,
},
{
.desc = "protected dual: drop multicast from unknown peer",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.unicast = false,
.result = RX_DROP_U_UNPROT_DUAL,
},
{
.desc = "protected dual: drop unicast without MFP",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.unicast = true,
.sta = true,
.result = RX_DROP_U_UNPROT_DUAL,
},
{
.desc = "protected dual: drop multicast without MFP",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.unicast = false,
.sta = true,
.result = RX_DROP_U_UNPROT_DUAL,
},
{
.desc = "protected dual: drop undecrypted unicast with MFP",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.unicast = true,
.sta = true,
.mfp = true,
.result = RX_DROP_U_UNPROT_DUAL,
},
{
.desc = "protected dual: drop undecrypted multicast with MFP",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.unicast = false,
.sta = true,
.mfp = true,
.result = RX_DROP_U_UNPROT_DUAL,
},
{
.desc = "protected dual: accept unicast with MFP",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.decrypted = true,
.unicast = true,
.sta = true,
.mfp = true,
.result = RX_CONTINUE,
},
{
.desc = "protected dual: accept multicast with MFP",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION,
.action = WLAN_PUB_ACTION_DSE_ENABLEMENT,
.decrypted = true,
.unicast = false,
.sta = true,
.mfp = true,
.result = RX_CONTINUE,
},
/* deauth/disassoc before keys are set */
{
.desc = "deauth: accept unicast with MFP but w/o key",
.stype = IEEE80211_STYPE_DEAUTH,
.sta = true,
.mfp = true,
.unicast = true,
.result = RX_CONTINUE,
},
{
.desc = "disassoc: accept unicast with MFP but w/o key",
.stype = IEEE80211_STYPE_DEAUTH,
.sta = true,
.mfp = true,
.unicast = true,
.result = RX_CONTINUE,
},
/* non-public robust action frame ... */
{
.desc = "BA action: drop unicast before assoc",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_BACK,
.unicast = true,
.sta = true,
.result = RX_DROP_U_UNPROT_ROBUST_ACTION,
},
{
.desc = "BA action: drop unprotected after assoc",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_BACK,
.unicast = true,
.sta = true,
.mfp = true,
.result = RX_DROP_U_UNPROT_UCAST_MGMT,
},
{
.desc = "BA action: accept unprotected without MFP",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_BACK,
.unicast = true,
.sta = true,
.assoc = true,
.mfp = false,
.result = RX_CONTINUE,
},
{
.desc = "BA action: drop unprotected with MFP",
.stype = IEEE80211_STYPE_ACTION,
.category = WLAN_CATEGORY_BACK,
.unicast = true,
.sta = true,
.mfp = true,
.result = RX_DROP_U_UNPROT_UCAST_MGMT,
},
};
KUNIT_ARRAY_PARAM_DESC(accept_mfp, accept_mfp_cases, desc);
static void accept_mfp(struct kunit *test)
{
static struct sta_info sta;
const struct mfp_test_case *params = test->param_value;
struct ieee80211_rx_data rx = {
.sta = params->sta ? &sta : NULL,
};
struct ieee80211_rx_status *status;
struct ieee80211_hdr_3addr hdr = {
.frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
params->stype),
.addr1 = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
.addr2 = { 0x12, 0x22, 0x33, 0x44, 0x55, 0x66 },
/* A3/BSSID doesn't matter here */
};
memset(&sta, 0, sizeof(sta));
if (!params->sta) {
KUNIT_ASSERT_FALSE(test, params->mfp);
KUNIT_ASSERT_FALSE(test, params->decrypted);
}
if (params->mfp)
set_sta_flag(&sta, WLAN_STA_MFP);
if (params->assoc)
set_bit(WLAN_STA_ASSOC, &sta._flags);
rx.skb = kunit_zalloc_skb(test, 128, GFP_KERNEL);
KUNIT_ASSERT_NOT_NULL(test, rx.skb);
status = IEEE80211_SKB_RXCB(rx.skb);
if (params->decrypted) {
status->flag |= RX_FLAG_DECRYPTED;
if (params->unicast)
hdr.frame_control |=
cpu_to_le16(IEEE80211_FCTL_PROTECTED);
}
if (params->unicast)
hdr.addr1[0] = 0x02;
skb_put_data(rx.skb, &hdr, sizeof(hdr));
switch (params->stype) {
case IEEE80211_STYPE_ACTION:
skb_put_u8(rx.skb, params->category);
skb_put_u8(rx.skb, params->action);
break;
case IEEE80211_STYPE_DEAUTH:
case IEEE80211_STYPE_DISASSOC: {
__le16 reason = cpu_to_le16(WLAN_REASON_UNSPECIFIED);
skb_put_data(rx.skb, &reason, sizeof(reason));
}
break;
}
KUNIT_EXPECT_EQ(test,
(__force u32)ieee80211_drop_unencrypted_mgmt(&rx),
(__force u32)params->result);
}
static struct kunit_case mfp_test_cases[] = {
KUNIT_CASE_PARAM(accept_mfp, accept_mfp_gen_params),
{}
};
static struct kunit_suite mfp = {
.name = "mac80211-mfp",
.test_cases = mfp_test_cases,
};
kunit_test_suite(mfp);

13
net/wireless/core.h
View File

@ -3,7 +3,7 @@
* Wireless configuration interface internals.
*
* Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
* Copyright (C) 2018-2022 Intel Corporation
* Copyright (C) 2018-2023 Intel Corporation
*/
#ifndef __NET_WIRELESS_CORE_H
#define __NET_WIRELESS_CORE_H
@ -549,4 +549,15 @@ int cfg80211_remove_virtual_intf(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev);
void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask);
#if IS_ENABLED(CONFIG_CFG80211_KUNIT_TEST)
#define EXPORT_SYMBOL_IF_CFG80211_KUNIT(sym) EXPORT_SYMBOL_IF_KUNIT(sym)
#define VISIBLE_IF_CFG80211_KUNIT
size_t cfg80211_gen_new_ie(const u8 *ie, size_t ielen,
const u8 *subie, size_t subie_len,
u8 *new_ie, size_t new_ie_len);
#else
#define EXPORT_SYMBOL_IF_CFG80211_KUNIT(sym)
#define VISIBLE_IF_CFG80211_KUNIT static
#endif /* IS_ENABLED(CONFIG_CFG80211_KUNIT_TEST) */
#endif /* __NET_WIRELESS_CORE_H */

58
net/wireless/scan.c
View File

@ -20,6 +20,7 @@
#include <net/cfg80211.h>
#include <net/cfg80211-wext.h>
#include <net/iw_handler.h>
#include <kunit/visibility.h>
#include "core.h"
#include "nl80211.h"
#include "wext-compat.h"
@ -303,9 +304,10 @@ static size_t cfg80211_copy_elem_with_frags(const struct element *elem,
return *pos - buf;
}
static size_t cfg80211_gen_new_ie(const u8 *ie, size_t ielen,
const u8 *subie, size_t subie_len,
u8 *new_ie, size_t new_ie_len)
VISIBLE_IF_CFG80211_KUNIT size_t
cfg80211_gen_new_ie(const u8 *ie, size_t ielen,
const u8 *subie, size_t subie_len,
u8 *new_ie, size_t new_ie_len)
{
const struct element *non_inherit_elem, *parent, *sub;
u8 *pos = new_ie;
@ -413,6 +415,7 @@ static size_t cfg80211_gen_new_ie(const u8 *ie, size_t ielen,
return pos - new_ie;
}
EXPORT_SYMBOL_IF_CFG80211_KUNIT(cfg80211_gen_new_ie);
static bool is_bss(struct cfg80211_bss *a, const u8 *bssid,
const u8 *ssid, size_t ssid_len)
@ -1864,7 +1867,7 @@ __cfg80211_bss_update(struct cfg80211_registered_device *rdev,
&hidden->hidden_list);
hidden->refcount++;
ies = (void *)rcu_dereference(new->pub.beacon_ies);
ies = (void *)rcu_access_pointer(new->pub.beacon_ies);
rcu_assign_pointer(new->pub.beacon_ies,
hidden->pub.beacon_ies);
if (ies)
@ -2614,10 +2617,12 @@ cfg80211_tbtt_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id,
return 0;
}
static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
struct cfg80211_inform_single_bss_data *tx_data,
struct cfg80211_bss *source_bss,
gfp_t gfp)
static void
cfg80211_parse_ml_elem_sta_data(struct wiphy *wiphy,
struct cfg80211_inform_single_bss_data *tx_data,
struct cfg80211_bss *source_bss,
const struct element *elem,
gfp_t gfp)
{
struct cfg80211_inform_single_bss_data data = {
.drv_data = tx_data->drv_data,
@ -2626,7 +2631,6 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
.bss_source = BSS_SOURCE_STA_PROFILE,
};
struct ieee80211_multi_link_elem *ml_elem;
const struct element *elem;
struct cfg80211_mle *mle;
u16 control;
u8 ml_common_len;
@ -2637,15 +2641,7 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
const u8 *pos;
u8 i;
if (!source_bss)
return;
if (tx_data->ftype != CFG80211_BSS_FTYPE_PRESP)
return;
elem = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK,
tx_data->ie, tx_data->ielen);
if (!elem || !ieee80211_mle_size_ok(elem->data + 1, elem->datalen - 1))
if (!ieee80211_mle_size_ok(elem->data + 1, elem->datalen - 1))
return;
ml_elem = (void *)elem->data + 1;
@ -2673,8 +2669,11 @@ static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
/* MLD capabilities and operations */
pos += 2;
/* Not included when the (nontransmitted) AP is responding itself,
* but defined to zero then (Draft P802.11be_D3.0, 9.4.2.170.2)
/*
* The MLD ID of the reporting AP is always zero. It is set if the AP
* is part of an MBSSID set and will be non-zero for ML Elements
* relating to a nontransmitted BSS (matching the Multi-BSSID Index,
* Draft P802.11be_D3.2, 35.3.4.2)
*/
if (u16_get_bits(control, IEEE80211_MLC_BASIC_PRES_MLD_ID)) {
mld_id = *pos;
@ -2817,6 +2816,25 @@ out:
kfree(mle);
}
static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy,
struct cfg80211_inform_single_bss_data *tx_data,
struct cfg80211_bss *source_bss,
gfp_t gfp)
{
const struct element *elem;
if (!source_bss)
return;
if (tx_data->ftype != CFG80211_BSS_FTYPE_PRESP)
return;
for_each_element_extid(elem, WLAN_EID_EXT_EHT_MULTI_LINK,
tx_data->ie, tx_data->ielen)
cfg80211_parse_ml_elem_sta_data(wiphy, tx_data, source_bss,
elem, gfp);
}
struct cfg80211_bss *
cfg80211_inform_bss_data(struct wiphy *wiphy,
struct cfg80211_inform_bss *data,

2
net/wireless/tests/Makefile
View File

@ -1,3 +1,3 @@
cfg80211-tests-y += module.o fragmentation.o
cfg80211-tests-y += module.o fragmentation.o scan.o util.o
obj-$(CONFIG_CFG80211_KUNIT_TEST) += cfg80211-tests.o

625
net/wireless/tests/scan.c Normal file
View File

@ -0,0 +1,625 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* KUnit tests for inform_bss functions
*
* Copyright (C) 2023 Intel Corporation
*/
#include <linux/ieee80211.h>
#include <net/cfg80211.h>
#include <kunit/test.h>
#include <kunit/skbuff.h>
#include "../core.h"
#include "util.h"
/* mac80211 helpers for element building */
#include "../../mac80211/ieee80211_i.h"
MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);
struct test_elem {
u8 id;
u8 len;
union {
u8 data[255];
struct {
u8 eid;
u8 edata[254];
};
};
};
static struct gen_new_ie_case {
const char *desc;
struct test_elem parent_ies[16];
struct test_elem child_ies[16];
struct test_elem result_ies[16];
} gen_new_ie_cases[] = {
{
.desc = "ML not inherited",
.parent_ies = {
{ .id = WLAN_EID_EXTENSION, .len = 255,
.eid = WLAN_EID_EXT_EHT_MULTI_LINK },
},
.child_ies = {
{ .id = WLAN_EID_SSID, .len = 2 },
},
.result_ies = {
{ .id = WLAN_EID_SSID, .len = 2 },
},
},
{
.desc = "fragments are ignored if previous len not 255",
.parent_ies = {
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 254, },
{ .id = WLAN_EID_FRAGMENT, .len = 125, },
},
.child_ies = {
{ .id = WLAN_EID_SSID, .len = 2 },
{ .id = WLAN_EID_FRAGMENT, .len = 125, },
},
.result_ies = {
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 254, },
{ .id = WLAN_EID_SSID, .len = 2 },
},
},
{
.desc = "fragments inherited",
.parent_ies = {
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 255, },
{ .id = WLAN_EID_FRAGMENT, .len = 125, },
},
.child_ies = {
{ .id = WLAN_EID_SSID, .len = 2 },
},
.result_ies = {
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 255, },
{ .id = WLAN_EID_FRAGMENT, .len = 125, },
{ .id = WLAN_EID_SSID, .len = 2 },
},
},
{
.desc = "fragments copied",
.parent_ies = {
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 255, },
{ .id = WLAN_EID_FRAGMENT, .len = 125, },
},
.child_ies = {
{ .id = WLAN_EID_SSID, .len = 2 },
},
.result_ies = {
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 255, },
{ .id = WLAN_EID_FRAGMENT, .len = 125, },
{ .id = WLAN_EID_SSID, .len = 2 },
},
},
{
.desc = "multiple elements inherit",
.parent_ies = {
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 255, },
{ .id = WLAN_EID_FRAGMENT, .len = 125, },
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 123, },
},
.child_ies = {
{ .id = WLAN_EID_SSID, .len = 2 },
},
.result_ies = {
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 255, },
{ .id = WLAN_EID_FRAGMENT, .len = 125, },
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 123, },
{ .id = WLAN_EID_SSID, .len = 2 },
},
},
{
.desc = "one child element overrides",
.parent_ies = {
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 255, },
{ .id = WLAN_EID_FRAGMENT, .len = 125, },
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 123, },
},
.child_ies = {
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 127, },
{ .id = WLAN_EID_SSID, .len = 2 },
},
.result_ies = {
{ .id = WLAN_EID_REDUCED_NEIGHBOR_REPORT, .len = 127, },
{ .id = WLAN_EID_SSID, .len = 2 },
},
},
{
.desc = "empty elements from parent",
.parent_ies = {
{ .id = 0x1, .len = 0, },
{ .id = WLAN_EID_EXTENSION, .len = 1, .eid = 0x10 },
},
.child_ies = {
},
.result_ies = {
{ .id = 0x1, .len = 0, },
{ .id = WLAN_EID_EXTENSION, .len = 1, .eid = 0x10 },
},
},
{
.desc = "empty elements from child",
.parent_ies = {
},
.child_ies = {
{ .id = 0x1, .len = 0, },
{ .id = WLAN_EID_EXTENSION, .len = 1, .eid = 0x10 },
},
.result_ies = {
{ .id = 0x1, .len = 0, },
{ .id = WLAN_EID_EXTENSION, .len = 1, .eid = 0x10 },
},
},
{
.desc = "invalid extended elements ignored",
.parent_ies = {
{ .id = WLAN_EID_EXTENSION, .len = 0 },
},
.child_ies = {
{ .id = WLAN_EID_EXTENSION, .len = 0 },
},
.result_ies = {
},
},
{
.desc = "multiple extended elements",
.parent_ies = {
{ .id = WLAN_EID_EXTENSION, .len = 3,
.eid = WLAN_EID_EXT_HE_CAPABILITY },
{ .id = WLAN_EID_EXTENSION, .len = 5,
.eid = WLAN_EID_EXT_ASSOC_DELAY_INFO },
{ .id = WLAN_EID_EXTENSION, .len = 7,
.eid = WLAN_EID_EXT_HE_OPERATION },
{ .id = WLAN_EID_EXTENSION, .len = 11,
.eid = WLAN_EID_EXT_FILS_REQ_PARAMS },
},
.child_ies = {
{ .id = WLAN_EID_SSID, .len = 13 },
{ .id = WLAN_EID_EXTENSION, .len = 17,
.eid = WLAN_EID_EXT_HE_CAPABILITY },
{ .id = WLAN_EID_EXTENSION, .len = 11,
.eid = WLAN_EID_EXT_FILS_KEY_CONFIRM },
{ .id = WLAN_EID_EXTENSION, .len = 19,
.eid = WLAN_EID_EXT_HE_OPERATION },
},
.result_ies = {
{ .id = WLAN_EID_EXTENSION, .len = 17,
.eid = WLAN_EID_EXT_HE_CAPABILITY },
{ .id = WLAN_EID_EXTENSION, .len = 5,
.eid = WLAN_EID_EXT_ASSOC_DELAY_INFO },
{ .id = WLAN_EID_EXTENSION, .len = 19,
.eid = WLAN_EID_EXT_HE_OPERATION },
{ .id = WLAN_EID_EXTENSION, .len = 11,
.eid = WLAN_EID_EXT_FILS_REQ_PARAMS },
{ .id = WLAN_EID_SSID, .len = 13 },
{ .id = WLAN_EID_EXTENSION, .len = 11,
.eid = WLAN_EID_EXT_FILS_KEY_CONFIRM },
},
},
{
.desc = "non-inherit element",
.parent_ies = {
{ .id = 0x1, .len = 7, },
{ .id = 0x2, .len = 11, },
{ .id = 0x3, .len = 13, },
{ .id = WLAN_EID_EXTENSION, .len = 17, .eid = 0x10 },
{ .id = WLAN_EID_EXTENSION, .len = 19, .eid = 0x11 },
{ .id = WLAN_EID_EXTENSION, .len = 23, .eid = 0x12 },
{ .id = WLAN_EID_EXTENSION, .len = 29, .eid = 0x14 },
},
.child_ies = {
{ .id = WLAN_EID_EXTENSION,
.eid = WLAN_EID_EXT_NON_INHERITANCE,
.len = 10,
.edata = { 0x3, 0x1, 0x2, 0x3,
0x4, 0x10, 0x11, 0x13, 0x14 } },
{ .id = WLAN_EID_SSID, .len = 2 },
},
.result_ies = {
{ .id = WLAN_EID_EXTENSION, .len = 23, .eid = 0x12 },
{ .id = WLAN_EID_SSID, .len = 2 },
},
},
};
KUNIT_ARRAY_PARAM_DESC(gen_new_ie, gen_new_ie_cases, desc)
static void test_gen_new_ie(struct kunit *test)
{
const struct gen_new_ie_case *params = test->param_value;
struct sk_buff *parent = kunit_zalloc_skb(test, 1024, GFP_KERNEL);
struct sk_buff *child = kunit_zalloc_skb(test, 1024, GFP_KERNEL);
struct sk_buff *reference = kunit_zalloc_skb(test, 1024, GFP_KERNEL);
u8 *out = kunit_kzalloc(test, IEEE80211_MAX_DATA_LEN, GFP_KERNEL);
size_t len;
int i;
KUNIT_ASSERT_NOT_NULL(test, parent);
KUNIT_ASSERT_NOT_NULL(test, child);
KUNIT_ASSERT_NOT_NULL(test, reference);
KUNIT_ASSERT_NOT_NULL(test, out);
for (i = 0; i < ARRAY_SIZE(params->parent_ies); i++) {
if (params->parent_ies[i].len != 0) {
skb_put_u8(parent, params->parent_ies[i].id);
skb_put_u8(parent, params->parent_ies[i].len);
skb_put_data(parent, params->parent_ies[i].data,
params->parent_ies[i].len);
}
if (params->child_ies[i].len != 0) {
skb_put_u8(child, params->child_ies[i].id);
skb_put_u8(child, params->child_ies[i].len);
skb_put_data(child, params->child_ies[i].data,
params->child_ies[i].len);
}
if (params->result_ies[i].len != 0) {
skb_put_u8(reference, params->result_ies[i].id);
skb_put_u8(reference, params->result_ies[i].len);
skb_put_data(reference, params->result_ies[i].data,
params->result_ies[i].len);
}
}
len = cfg80211_gen_new_ie(parent->data, parent->len,
child->data, child->len,
out, IEEE80211_MAX_DATA_LEN);
KUNIT_EXPECT_EQ(test, len, reference->len);
KUNIT_EXPECT_MEMEQ(test, out, reference->data, reference->len);
memset(out, 0, IEEE80211_MAX_DATA_LEN);
/* Exactly enough space */
len = cfg80211_gen_new_ie(parent->data, parent->len,
child->data, child->len,
out, reference->len);
KUNIT_EXPECT_EQ(test, len, reference->len);
KUNIT_EXPECT_MEMEQ(test, out, reference->data, reference->len);
memset(out, 0, IEEE80211_MAX_DATA_LEN);
/* Not enough space (or expected zero length) */
len = cfg80211_gen_new_ie(parent->data, parent->len,
child->data, child->len,
out, reference->len - 1);
KUNIT_EXPECT_EQ(test, len, 0);
}
static void test_gen_new_ie_malformed(struct kunit *test)
{
struct sk_buff *malformed = kunit_zalloc_skb(test, 1024, GFP_KERNEL);
u8 *out = kunit_kzalloc(test, IEEE80211_MAX_DATA_LEN, GFP_KERNEL);
size_t len;
KUNIT_ASSERT_NOT_NULL(test, malformed);
KUNIT_ASSERT_NOT_NULL(test, out);
skb_put_u8(malformed, WLAN_EID_SSID);
skb_put_u8(malformed, 3);
skb_put(malformed, 3);
skb_put_u8(malformed, WLAN_EID_REDUCED_NEIGHBOR_REPORT);
skb_put_u8(malformed, 10);
skb_put(malformed, 9);
len = cfg80211_gen_new_ie(malformed->data, malformed->len,
out, 0,
out, IEEE80211_MAX_DATA_LEN);
KUNIT_EXPECT_EQ(test, len, 5);
len = cfg80211_gen_new_ie(out, 0,
malformed->data, malformed->len,
out, IEEE80211_MAX_DATA_LEN);
KUNIT_EXPECT_EQ(test, len, 5);
}
struct inform_bss {
struct kunit *test;
int inform_bss_count;
};
static void inform_bss_inc_counter(struct wiphy *wiphy,
struct cfg80211_bss *bss,
const struct cfg80211_bss_ies *ies,
void *drv_data)
{
struct inform_bss *ctx = t_wiphy_ctx(wiphy);
ctx->inform_bss_count++;
rcu_read_lock();
KUNIT_EXPECT_PTR_EQ(ctx->test, drv_data, ctx);
KUNIT_EXPECT_PTR_EQ(ctx->test, ies, rcu_dereference(bss->ies));
rcu_read_unlock();
}
static void test_inform_bss_ssid_only(struct kunit *test)
{
struct inform_bss ctx = {
.test = test,
};
struct wiphy *wiphy = T_WIPHY(test, ctx);
struct t_wiphy_priv *w_priv = wiphy_priv(wiphy);
struct cfg80211_inform_bss inform_bss = {
.signal = 50,
.drv_data = &ctx,
};
const u8 bssid[ETH_ALEN] = { 0x10, 0x22, 0x33, 0x44, 0x55, 0x66 };
u64 tsf = 0x1000000000000000ULL;
int beacon_int = 100;
u16 capability = 0x1234;
static const u8 input[] = {
[0] = WLAN_EID_SSID,
[1] = 4,
[2] = 'T', 'E', 'S', 'T'
};
struct cfg80211_bss *bss, *other;
const struct cfg80211_bss_ies *ies;
w_priv->ops->inform_bss = inform_bss_inc_counter;
inform_bss.chan = ieee80211_get_channel_khz(wiphy, MHZ_TO_KHZ(2412));
KUNIT_ASSERT_NOT_NULL(test, inform_bss.chan);
bss = cfg80211_inform_bss_data(wiphy, &inform_bss,
CFG80211_BSS_FTYPE_PRESP, bssid, tsf,
capability, beacon_int,
input, sizeof(input),
GFP_KERNEL);
KUNIT_EXPECT_NOT_NULL(test, bss);
KUNIT_EXPECT_EQ(test, ctx.inform_bss_count, 1);
/* Check values in returned bss are correct */
KUNIT_EXPECT_EQ(test, bss->signal, inform_bss.signal);
KUNIT_EXPECT_EQ(test, bss->beacon_interval, beacon_int);
KUNIT_EXPECT_EQ(test, bss->capability, capability);
KUNIT_EXPECT_EQ(test, bss->bssid_index, 0);
KUNIT_EXPECT_PTR_EQ(test, bss->channel, inform_bss.chan);
KUNIT_EXPECT_MEMEQ(test, bssid, bss->bssid, sizeof(bssid));
/* Check the IEs have the expected value */
rcu_read_lock();
ies = rcu_dereference(bss->ies);
KUNIT_EXPECT_NOT_NULL(test, ies);
KUNIT_EXPECT_EQ(test, ies->tsf, tsf);
KUNIT_EXPECT_EQ(test, ies->len, sizeof(input));
KUNIT_EXPECT_MEMEQ(test, ies->data, input, sizeof(input));
rcu_read_unlock();
/* Check we can look up the BSS - by SSID */
other = cfg80211_get_bss(wiphy, NULL, NULL, "TEST", 4,
IEEE80211_BSS_TYPE_ANY,
IEEE80211_PRIVACY_ANY);
KUNIT_EXPECT_PTR_EQ(test, bss, other);
cfg80211_put_bss(wiphy, other);
/* Check we can look up the BSS - by BSSID */
other = cfg80211_get_bss(wiphy, NULL, bssid, NULL, 0,
IEEE80211_BSS_TYPE_ANY,
IEEE80211_PRIVACY_ANY);
KUNIT_EXPECT_PTR_EQ(test, bss, other);
cfg80211_put_bss(wiphy, other);
cfg80211_put_bss(wiphy, bss);
}
static struct inform_bss_ml_sta_case {
const char *desc;
int mld_id;
bool sta_prof_vendor_elems;
} inform_bss_ml_sta_cases[] = {
{ .desc = "no_mld_id", .mld_id = 0, .sta_prof_vendor_elems = false },
{ .desc = "mld_id_eq_1", .mld_id = 1, .sta_prof_vendor_elems = true },
};
KUNIT_ARRAY_PARAM_DESC(inform_bss_ml_sta, inform_bss_ml_sta_cases, desc)
static void test_inform_bss_ml_sta(struct kunit *test)
{
const struct inform_bss_ml_sta_case *params = test->param_value;
struct inform_bss ctx = {
.test = test,
};
struct wiphy *wiphy = T_WIPHY(test, ctx);
struct t_wiphy_priv *w_priv = wiphy_priv(wiphy);
struct cfg80211_inform_bss inform_bss = {
.signal = 50,
.drv_data = &ctx,
};
struct cfg80211_bss *bss, *link_bss;
const struct cfg80211_bss_ies *ies;
/* sending station */
const u8 bssid[ETH_ALEN] = { 0x10, 0x22, 0x33, 0x44, 0x55, 0x66 };
u64 tsf = 0x1000000000000000ULL;
int beacon_int = 100;
u16 capability = 0x1234;
/* Building the frame *************************************************/
struct sk_buff *input = kunit_zalloc_skb(test, 1024, GFP_KERNEL);
u8 *len_mle, *len_prof;
u8 link_id = 2;
struct {
struct ieee80211_neighbor_ap_info info;
struct ieee80211_tbtt_info_ge_11 ap;
} __packed rnr = {
.info = {
.tbtt_info_hdr = u8_encode_bits(0, IEEE80211_AP_INFO_TBTT_HDR_COUNT),
.tbtt_info_len = sizeof(struct ieee80211_tbtt_info_ge_11),
.op_class = 81,
.channel = 11,
},
.ap = {
.tbtt_offset = 0xff,
.bssid = { 0x10, 0x22, 0x33, 0x44, 0x55, 0x67 },
.short_ssid = 0, /* unused */
.bss_params = 0,
.psd_20 = 0,
.mld_params.mld_id = params->mld_id,
.mld_params.params =
le16_encode_bits(link_id,
IEEE80211_RNR_MLD_PARAMS_LINK_ID),
}
};
struct {
__le16 control;
u8 var_len;
u8 mld_mac_addr[ETH_ALEN];
u8 link_id_info;
u8 params_change_count;
__le16 mld_caps_and_ops;
u8 mld_id;
__le16 ext_mld_caps_and_ops;
} __packed mle_basic_common_info = {
.control =
cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC |
IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT |
IEEE80211_MLC_BASIC_PRES_LINK_ID |
(params->mld_id ? IEEE80211_MLC_BASIC_PRES_MLD_ID : 0) |
IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP),
.mld_id = params->mld_id,
.mld_caps_and_ops = cpu_to_le16(0x0102),
.ext_mld_caps_and_ops = cpu_to_le16(0x0304),
.var_len = sizeof(mle_basic_common_info) - 2 -
(params->mld_id ? 0 : 1),
.mld_mac_addr = { 0x10, 0x22, 0x33, 0x44, 0x55, 0x60 },
};
struct {
__le16 control;
u8 var_len;
u8 bssid[ETH_ALEN];
__le16 beacon_int;
__le64 tsf_offset;
__le16 capabilities; /* already part of payload */
} __packed sta_prof = {
.control =
cpu_to_le16(IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE |
IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT |
IEEE80211_MLE_STA_CONTROL_BEACON_INT_PRESENT |
IEEE80211_MLE_STA_CONTROL_TSF_OFFS_PRESENT |
u16_encode_bits(link_id,
IEEE80211_MLE_STA_CONTROL_LINK_ID)),
.var_len = sizeof(sta_prof) - 2 - 2,
.bssid = { *rnr.ap.bssid },
.beacon_int = cpu_to_le16(101),
.tsf_offset = cpu_to_le64(-123ll),
.capabilities = cpu_to_le16(0xdead),
};
KUNIT_ASSERT_NOT_NULL(test, input);
w_priv->ops->inform_bss = inform_bss_inc_counter;
inform_bss.chan = ieee80211_get_channel_khz(wiphy, MHZ_TO_KHZ(2412));
KUNIT_ASSERT_NOT_NULL(test, inform_bss.chan);
skb_put_u8(input, WLAN_EID_SSID);
skb_put_u8(input, 4);
skb_put_data(input, "TEST", 4);
skb_put_u8(input, WLAN_EID_REDUCED_NEIGHBOR_REPORT);
skb_put_u8(input, sizeof(rnr));
skb_put_data(input, &rnr, sizeof(rnr));
/* build a multi-link element */
skb_put_u8(input, WLAN_EID_EXTENSION);
len_mle = skb_put(input, 1);
skb_put_u8(input, WLAN_EID_EXT_EHT_MULTI_LINK);
skb_put_data(input, &mle_basic_common_info, sizeof(mle_basic_common_info));
if (!params->mld_id)
t_skb_remove_member(input, typeof(mle_basic_common_info), mld_id);
/* with a STA profile inside */
skb_put_u8(input, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE);
len_prof = skb_put(input, 1);
skb_put_data(input, &sta_prof, sizeof(sta_prof));
if (params->sta_prof_vendor_elems) {
/* Put two (vendor) element into sta_prof */
skb_put_u8(input, WLAN_EID_VENDOR_SPECIFIC);
skb_put_u8(input, 160);
skb_put(input, 160);
skb_put_u8(input, WLAN_EID_VENDOR_SPECIFIC);
skb_put_u8(input, 165);
skb_put(input, 165);
}
/* fragment STA profile */
ieee80211_fragment_element(input, len_prof,
IEEE80211_MLE_SUBELEM_FRAGMENT);
/* fragment MLE */
ieee80211_fragment_element(input, len_mle, WLAN_EID_FRAGMENT);
/* Put a (vendor) element after the ML element */
skb_put_u8(input, WLAN_EID_VENDOR_SPECIFIC);
skb_put_u8(input, 155);
skb_put(input, 155);
/* Submit *************************************************************/
bss = cfg80211_inform_bss_data(wiphy, &inform_bss,
CFG80211_BSS_FTYPE_PRESP, bssid, tsf,
capability, beacon_int,
input->data, input->len,
GFP_KERNEL);
KUNIT_EXPECT_NOT_NULL(test, bss);
KUNIT_EXPECT_EQ(test, ctx.inform_bss_count, 2);
/* Check link_bss *****************************************************/
link_bss = cfg80211_get_bss(wiphy, NULL, sta_prof.bssid, NULL, 0,
IEEE80211_BSS_TYPE_ANY,
IEEE80211_PRIVACY_ANY);
KUNIT_ASSERT_NOT_NULL(test, link_bss);
KUNIT_EXPECT_EQ(test, link_bss->signal, 0);
KUNIT_EXPECT_EQ(test, link_bss->beacon_interval,
le16_to_cpu(sta_prof.beacon_int));
KUNIT_EXPECT_EQ(test, link_bss->capability,
le16_to_cpu(sta_prof.capabilities));
KUNIT_EXPECT_EQ(test, link_bss->bssid_index, 0);
KUNIT_EXPECT_PTR_EQ(test, link_bss->channel,
ieee80211_get_channel_khz(wiphy, MHZ_TO_KHZ(2462)));
rcu_read_lock();
ies = rcu_dereference(link_bss->ies);
KUNIT_EXPECT_NOT_NULL(test, ies);
KUNIT_EXPECT_EQ(test, ies->tsf, tsf + le64_to_cpu(sta_prof.tsf_offset));
/* Resulting length should be:
* SSID (inherited) + RNR (inherited) + vendor element(s) +
* MLE common info + MLE header and control
*/
if (params->sta_prof_vendor_elems)
KUNIT_EXPECT_EQ(test, ies->len,
6 + 2 + sizeof(rnr) + 2 + 160 + 2 + 165 +
mle_basic_common_info.var_len + 5);
else
KUNIT_EXPECT_EQ(test, ies->len,
6 + 2 + sizeof(rnr) + 2 + 155 +
mle_basic_common_info.var_len + 5);
rcu_read_unlock();
cfg80211_put_bss(wiphy, bss);
cfg80211_put_bss(wiphy, link_bss);
}
static struct kunit_case gen_new_ie_test_cases[] = {
KUNIT_CASE_PARAM(test_gen_new_ie, gen_new_ie_gen_params),
KUNIT_CASE(test_gen_new_ie_malformed),
{}
};
static struct kunit_suite gen_new_ie = {
.name = "cfg80211-ie-generation",
.test_cases = gen_new_ie_test_cases,
};
kunit_test_suite(gen_new_ie);
static struct kunit_case inform_bss_test_cases[] = {
KUNIT_CASE(test_inform_bss_ssid_only),
KUNIT_CASE_PARAM(test_inform_bss_ml_sta, inform_bss_ml_sta_gen_params),
{}
};
static struct kunit_suite inform_bss = {
.name = "cfg80211-inform-bss",
.test_cases = inform_bss_test_cases,
};
kunit_test_suite(inform_bss);

56
net/wireless/tests/util.c Normal file
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@ -0,0 +1,56 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* KUnit fixture to have a (configurable) wiphy
*
* Copyright (C) 2023 Intel Corporation
*/
#include <linux/ieee80211.h>
#include <net/cfg80211.h>
#include <kunit/test.h>
#include <kunit/test-bug.h>
#include "util.h"
int t_wiphy_init(struct kunit_resource *resource, void *ctx)
{
struct kunit *test = kunit_get_current_test();
struct cfg80211_ops *ops;
struct wiphy *wiphy;
struct t_wiphy_priv *priv;
ops = kzalloc(sizeof(*ops), GFP_KERNEL);
KUNIT_ASSERT_NOT_NULL(test, ops);
wiphy = wiphy_new_nm(ops, sizeof(*priv), "kunit");
KUNIT_ASSERT_NOT_NULL(test, wiphy);
priv = wiphy_priv(wiphy);
priv->ctx = ctx;
priv->ops = ops;
/* Initialize channels, feel free to add more here channels/bands */
memcpy(priv->channels_2ghz, channels_2ghz, sizeof(channels_2ghz));
wiphy->bands[NL80211_BAND_2GHZ] = &priv->band_2ghz;
priv->band_2ghz.channels = priv->channels_2ghz;
priv->band_2ghz.n_channels = ARRAY_SIZE(channels_2ghz);
resource->data = wiphy;
resource->name = "wiphy";
return 0;
}
void t_wiphy_exit(struct kunit_resource *resource)
{
struct t_wiphy_priv *priv;
struct cfg80211_ops *ops;
priv = wiphy_priv(resource->data);
ops = priv->ops;
/* Should we ensure anything about the state here?
* e.g. full destruction or no calls to any ops on destruction?
*/
wiphy_free(resource->data);
kfree(ops);
}

66
net/wireless/tests/util.h Normal file
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@ -0,0 +1,66 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Utilities for cfg80211 unit testing
*
* Copyright (C) 2023 Intel Corporation
*/
#ifndef __CFG80211_UTILS_H
#define __CFG80211_UTILS_H
#define CHAN2G(_freq) { \
.band = NL80211_BAND_2GHZ, \
.center_freq = (_freq), \
.hw_value = (_freq), \
}
static const struct ieee80211_channel channels_2ghz[] = {
CHAN2G(2412), /* Channel 1 */
CHAN2G(2417), /* Channel 2 */
CHAN2G(2422), /* Channel 3 */
CHAN2G(2427), /* Channel 4 */
CHAN2G(2432), /* Channel 5 */
CHAN2G(2437), /* Channel 6 */
CHAN2G(2442), /* Channel 7 */
CHAN2G(2447), /* Channel 8 */
CHAN2G(2452), /* Channel 9 */
CHAN2G(2457), /* Channel 10 */
CHAN2G(2462), /* Channel 11 */
CHAN2G(2467), /* Channel 12 */
CHAN2G(2472), /* Channel 13 */
CHAN2G(2484), /* Channel 14 */
};
struct t_wiphy_priv {
struct kunit *test;
struct cfg80211_ops *ops;
void *ctx;
struct ieee80211_supported_band band_2ghz;
struct ieee80211_channel channels_2ghz[ARRAY_SIZE(channels_2ghz)];
};
#define T_WIPHY(test, ctx) ({ \
struct wiphy *__wiphy = \
kunit_alloc_resource(test, t_wiphy_init, \
t_wiphy_exit, \
GFP_KERNEL, &(ctx)); \
\
KUNIT_ASSERT_NOT_NULL(test, __wiphy); \
__wiphy; \
})
#define t_wiphy_ctx(wiphy) (((struct t_wiphy_priv *)wiphy_priv(wiphy))->ctx)
int t_wiphy_init(struct kunit_resource *resource, void *data);
void t_wiphy_exit(struct kunit_resource *resource);
#define t_skb_remove_member(skb, type, member) do { \
memmove((skb)->data + (skb)->len - sizeof(type) + \
offsetof(type, member), \
(skb)->data + (skb)->len - sizeof(type) + \
offsetofend(type, member), \
offsetofend(type, member)); \
skb_trim(skb, (skb)->len - sizeof_field(type, member)); \
} while (0)
#endif /* __CFG80211_UTILS_H */

56
net/wireless/util.c
View File

@ -980,7 +980,63 @@ unsigned int cfg80211_classify8021d(struct sk_buff *skb,
}
}
/* The default mapping as defined Section 2.3 in RFC8325: The three
* Most Significant Bits (MSBs) of the DSCP are used as the
* corresponding L2 markings.
*/
ret = dscp >> 5;
/* Handle specific DSCP values for which the default mapping (as
* described above) doesn't adhere to the intended usage of the DSCP
* value. See section 4 in RFC8325. Specifically, for the following
* Diffserv Service Classes no update is needed:
* - Standard: DF
* - Low Priority Data: CS1
* - Multimedia Streaming: AF31, AF32, AF33
* - Multimedia Conferencing: AF41, AF42, AF43
* - Network Control Traffic: CS7
* - Real-Time Interactive: CS4
*/
switch (dscp >> 2) {
case 10:
case 12:
case 14:
/* High throughput data: AF11, AF12, AF13 */
ret = 0;
break;
case 16:
/* Operations, Administration, and Maintenance and Provisioning:
* CS2
*/
ret = 0;
break;
case 18:
case 20:
case 22:
/* Low latency data: AF21, AF22, AF23 */
ret = 3;
break;
case 24:
/* Broadcasting video: CS3 */
ret = 4;
break;
case 40:
/* Signaling: CS5 */
ret = 5;
break;
case 44:
/* Voice Admit: VA */
ret = 6;
break;
case 46:
/* Telephony traffic: EF */
ret = 6;
break;
case 48:
/* Network Control Traffic: CS6 */
ret = 7;
break;
}
out:
return array_index_nospec(ret, IEEE80211_NUM_TIDS);
}