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wifi: cfg80211: add a kunit test for 6 GHz colocated AP parsing
Test a few things around parsing of 6 GHz colocated APs to e.g. ensure that we are not going to scan for a disabled (affiliated) AP. Signed-off-by: Benjamin Berg <benjamin.berg@intel.com> Link: https://msgid.link/20240129220918.079dc50ab43b.Ide898d9f1d4c26d7e774d6fd0ec57766967d6572@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Benjamin Berg
Johannes Berg
parent
ce1fa3adc0
commit
45d43937a4
3 changed files with 230 additions and 42 deletions
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@ -550,9 +550,53 @@ int cfg80211_remove_virtual_intf(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev);
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void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask);
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/**
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* struct cfg80211_colocated_ap - colocated AP information
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*
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* @list: linked list to all colocated APs
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* @bssid: BSSID of the reported AP
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* @ssid: SSID of the reported AP
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* @ssid_len: length of the ssid
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* @center_freq: frequency the reported AP is on
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* @unsolicited_probe: the reported AP is part of an ESS, where all the APs
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* that operate in the same channel as the reported AP and that might be
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* detected by a STA receiving this frame, are transmitting unsolicited
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* Probe Response frames every 20 TUs
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* @oct_recommended: OCT is recommended to exchange MMPDUs with the reported AP
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* @same_ssid: the reported AP has the same SSID as the reporting AP
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* @multi_bss: the reported AP is part of a multiple BSSID set
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* @transmitted_bssid: the reported AP is the transmitting BSSID
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* @colocated_ess: all the APs that share the same ESS as the reported AP are
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* colocated and can be discovered via legacy bands.
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* @short_ssid_valid: short_ssid is valid and can be used
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* @short_ssid: the short SSID for this SSID
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* @psd_20: The 20MHz PSD EIRP of the primary 20MHz channel for the reported AP
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*/
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struct cfg80211_colocated_ap {
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struct list_head list;
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u8 bssid[ETH_ALEN];
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u8 ssid[IEEE80211_MAX_SSID_LEN];
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size_t ssid_len;
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u32 short_ssid;
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u32 center_freq;
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u8 unsolicited_probe:1,
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oct_recommended:1,
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same_ssid:1,
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multi_bss:1,
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transmitted_bssid:1,
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colocated_ess:1,
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short_ssid_valid:1;
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s8 psd_20;
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};
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#if IS_ENABLED(CONFIG_CFG80211_KUNIT_TEST)
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#define EXPORT_SYMBOL_IF_CFG80211_KUNIT(sym) EXPORT_SYMBOL_IF_KUNIT(sym)
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#define VISIBLE_IF_CFG80211_KUNIT
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void cfg80211_free_coloc_ap_list(struct list_head *coloc_ap_list);
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int cfg80211_parse_colocated_ap(const struct cfg80211_bss_ies *ies,
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struct list_head *list);
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size_t cfg80211_gen_new_ie(const u8 *ie, size_t ielen,
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const u8 *subie, size_t subie_len,
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u8 *new_ie, size_t new_ie_len);
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@ -77,45 +77,6 @@ MODULE_PARM_DESC(bss_entries_limit,
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#define IEEE80211_SCAN_RESULT_EXPIRE (30 * HZ)
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/**
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* struct cfg80211_colocated_ap - colocated AP information
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*
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* @list: linked list to all colocated aPS
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* @bssid: BSSID of the reported AP
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* @ssid: SSID of the reported AP
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* @ssid_len: length of the ssid
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* @center_freq: frequency the reported AP is on
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* @unsolicited_probe: the reported AP is part of an ESS, where all the APs
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* that operate in the same channel as the reported AP and that might be
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* detected by a STA receiving this frame, are transmitting unsolicited
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* Probe Response frames every 20 TUs
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* @oct_recommended: OCT is recommended to exchange MMPDUs with the reported AP
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* @same_ssid: the reported AP has the same SSID as the reporting AP
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* @multi_bss: the reported AP is part of a multiple BSSID set
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* @transmitted_bssid: the reported AP is the transmitting BSSID
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* @colocated_ess: all the APs that share the same ESS as the reported AP are
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* colocated and can be discovered via legacy bands.
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* @short_ssid_valid: short_ssid is valid and can be used
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* @short_ssid: the short SSID for this SSID
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* @psd_20: The 20MHz PSD EIRP of the primary 20MHz channel for the reported AP
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*/
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struct cfg80211_colocated_ap {
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struct list_head list;
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u8 bssid[ETH_ALEN];
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u8 ssid[IEEE80211_MAX_SSID_LEN];
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size_t ssid_len;
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u32 short_ssid;
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u32 center_freq;
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u8 unsolicited_probe:1,
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oct_recommended:1,
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same_ssid:1,
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multi_bss:1,
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transmitted_bssid:1,
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colocated_ess:1,
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short_ssid_valid:1;
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s8 psd_20;
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};
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static void bss_free(struct cfg80211_internal_bss *bss)
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{
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struct cfg80211_bss_ies *ies;
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@ -566,7 +527,8 @@ static int cfg80211_calc_short_ssid(const struct cfg80211_bss_ies *ies,
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return 0;
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}
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static void cfg80211_free_coloc_ap_list(struct list_head *coloc_ap_list)
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VISIBLE_IF_CFG80211_KUNIT void
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cfg80211_free_coloc_ap_list(struct list_head *coloc_ap_list)
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{
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struct cfg80211_colocated_ap *ap, *tmp_ap;
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@ -575,6 +537,7 @@ static void cfg80211_free_coloc_ap_list(struct list_head *coloc_ap_list)
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kfree(ap);
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}
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}
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EXPORT_SYMBOL_IF_KUNIT(cfg80211_free_coloc_ap_list);
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static int cfg80211_parse_ap_info(struct cfg80211_colocated_ap *entry,
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const u8 *pos, u8 length,
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@ -648,8 +611,9 @@ static int cfg80211_parse_ap_info(struct cfg80211_colocated_ap *entry,
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return 0;
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}
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static int cfg80211_parse_colocated_ap(const struct cfg80211_bss_ies *ies,
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struct list_head *list)
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VISIBLE_IF_CFG80211_KUNIT int
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cfg80211_parse_colocated_ap(const struct cfg80211_bss_ies *ies,
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struct list_head *list)
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{
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struct ieee80211_neighbor_ap_info *ap_info;
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const struct element *elem, *ssid_elem;
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@ -746,6 +710,7 @@ static int cfg80211_parse_colocated_ap(const struct cfg80211_bss_ies *ies,
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list_splice_tail(&ap_list, list);
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return n_coloc;
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}
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EXPORT_SYMBOL_IF_KUNIT(cfg80211_parse_colocated_ap);
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static void cfg80211_scan_req_add_chan(struct cfg80211_scan_request *request,
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struct ieee80211_channel *chan,
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@ -628,6 +628,172 @@ static void test_inform_bss_ml_sta(struct kunit *test)
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cfg80211_put_bss(wiphy, link_bss);
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}
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static struct cfg80211_parse_colocated_ap_case {
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const char *desc;
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u8 op_class;
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u8 channel;
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struct ieee80211_neighbor_ap_info info;
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union {
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struct ieee80211_tbtt_info_ge_11 tbtt_long;
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struct ieee80211_tbtt_info_7_8_9 tbtt_short;
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};
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bool add_junk;
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bool same_ssid;
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bool valid;
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} cfg80211_parse_colocated_ap_cases[] = {
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{
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.desc = "wrong_band",
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.info.op_class = 81,
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.info.channel = 11,
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.tbtt_long = {
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.bssid = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
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.bss_params = IEEE80211_RNR_TBTT_PARAMS_COLOC_AP,
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},
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.valid = false,
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},
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{
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.desc = "wrong_type",
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/* IEEE80211_AP_INFO_TBTT_HDR_TYPE is in the least significant bits */
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.info.tbtt_info_hdr = IEEE80211_TBTT_INFO_TYPE_MLD,
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.tbtt_long = {
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.bssid = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
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.bss_params = IEEE80211_RNR_TBTT_PARAMS_COLOC_AP,
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},
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.valid = false,
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},
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{
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.desc = "colocated_invalid_len_short",
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.info.tbtt_info_len = 6,
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.tbtt_short = {
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.bssid = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
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.bss_params = IEEE80211_RNR_TBTT_PARAMS_COLOC_AP |
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IEEE80211_RNR_TBTT_PARAMS_SAME_SSID,
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},
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.valid = false,
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},
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{
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.desc = "colocated_invalid_len_short_mld",
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.info.tbtt_info_len = 10,
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.tbtt_long = {
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.bssid = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
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.bss_params = IEEE80211_RNR_TBTT_PARAMS_COLOC_AP,
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},
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.valid = false,
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},
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{
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.desc = "colocated_non_mld",
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.info.tbtt_info_len = sizeof(struct ieee80211_tbtt_info_7_8_9),
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.tbtt_short = {
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.bssid = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
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.bss_params = IEEE80211_RNR_TBTT_PARAMS_COLOC_AP |
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IEEE80211_RNR_TBTT_PARAMS_SAME_SSID,
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},
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.same_ssid = true,
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.valid = true,
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},
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{
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.desc = "colocated_non_mld_invalid_bssid",
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.info.tbtt_info_len = sizeof(struct ieee80211_tbtt_info_7_8_9),
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.tbtt_short = {
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.bssid = { 0xff, 0x11, 0x22, 0x33, 0x44, 0x55 },
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.bss_params = IEEE80211_RNR_TBTT_PARAMS_COLOC_AP |
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IEEE80211_RNR_TBTT_PARAMS_SAME_SSID,
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},
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.same_ssid = true,
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.valid = false,
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},
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{
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.desc = "colocated_mld",
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.tbtt_long = {
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.bssid = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
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.bss_params = IEEE80211_RNR_TBTT_PARAMS_COLOC_AP,
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},
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.valid = true,
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},
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{
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.desc = "colocated_mld",
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.tbtt_long = {
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.bssid = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
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.bss_params = IEEE80211_RNR_TBTT_PARAMS_COLOC_AP,
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},
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.add_junk = true,
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.valid = false,
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},
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{
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.desc = "colocated_disabled_mld",
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.tbtt_long = {
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.bssid = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 },
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.bss_params = IEEE80211_RNR_TBTT_PARAMS_COLOC_AP,
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.mld_params.params = cpu_to_le16(IEEE80211_RNR_MLD_PARAMS_DISABLED_LINK),
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},
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.valid = false,
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},
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};
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KUNIT_ARRAY_PARAM_DESC(cfg80211_parse_colocated_ap, cfg80211_parse_colocated_ap_cases, desc)
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static void test_cfg80211_parse_colocated_ap(struct kunit *test)
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{
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const struct cfg80211_parse_colocated_ap_case *params = test->param_value;
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struct sk_buff *input = kunit_zalloc_skb(test, 1024, GFP_KERNEL);
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struct cfg80211_bss_ies *ies;
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struct ieee80211_neighbor_ap_info info;
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LIST_HEAD(coloc_ap_list);
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int count;
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KUNIT_ASSERT_NOT_NULL(test, input);
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info = params->info;
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/* Reasonable values for a colocated AP */
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if (!info.tbtt_info_len)
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info.tbtt_info_len = sizeof(params->tbtt_long);
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if (!info.op_class)
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info.op_class = 131;
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if (!info.channel)
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info.channel = 33;
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/* Zero is the correct default for .btt_info_hdr (one entry, TBTT type) */
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skb_put_u8(input, WLAN_EID_SSID);
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skb_put_u8(input, 4);
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skb_put_data(input, "TEST", 4);
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skb_put_u8(input, WLAN_EID_REDUCED_NEIGHBOR_REPORT);
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skb_put_u8(input, sizeof(info) + info.tbtt_info_len + (params->add_junk ? 3 : 0));
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skb_put_data(input, &info, sizeof(info));
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skb_put_data(input, ¶ms->tbtt_long, info.tbtt_info_len);
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if (params->add_junk)
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skb_put_data(input, "123", 3);
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ies = kunit_kzalloc(test, struct_size(ies, data, input->len), GFP_KERNEL);
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ies->len = input->len;
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memcpy(ies->data, input->data, input->len);
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count = cfg80211_parse_colocated_ap(ies, &coloc_ap_list);
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KUNIT_EXPECT_EQ(test, count, params->valid);
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KUNIT_EXPECT_EQ(test, list_count_nodes(&coloc_ap_list), params->valid);
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if (params->valid && !list_empty(&coloc_ap_list)) {
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struct cfg80211_colocated_ap *ap;
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ap = list_first_entry(&coloc_ap_list, typeof(*ap), list);
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if (info.tbtt_info_len <= sizeof(params->tbtt_short))
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KUNIT_EXPECT_MEMEQ(test, ap->bssid, params->tbtt_short.bssid, ETH_ALEN);
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else
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KUNIT_EXPECT_MEMEQ(test, ap->bssid, params->tbtt_long.bssid, ETH_ALEN);
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if (params->same_ssid) {
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KUNIT_EXPECT_EQ(test, ap->ssid_len, 4);
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KUNIT_EXPECT_MEMEQ(test, ap->ssid, "TEST", 4);
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} else {
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KUNIT_EXPECT_EQ(test, ap->ssid_len, 0);
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}
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}
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cfg80211_free_coloc_ap_list(&coloc_ap_list);
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}
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static struct kunit_case gen_new_ie_test_cases[] = {
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KUNIT_CASE_PARAM(test_gen_new_ie, gen_new_ie_gen_params),
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KUNIT_CASE(test_gen_new_ie_malformed),
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@ -653,3 +819,16 @@ static struct kunit_suite inform_bss = {
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};
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kunit_test_suite(inform_bss);
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static struct kunit_case scan_6ghz_cases[] = {
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KUNIT_CASE_PARAM(test_cfg80211_parse_colocated_ap,
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cfg80211_parse_colocated_ap_gen_params),
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{}
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};
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static struct kunit_suite scan_6ghz = {
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.name = "cfg80211-scan-6ghz",
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.test_cases = scan_6ghz_cases,
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};
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kunit_test_suite(scan_6ghz);
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