wpa_supplicant: Remove duplicate logic in wpas_ml_element()
Parsing multiple RNR elements already exists in wpa_bss_parse_basic_ml_element(), so wpas_ml_element() just duplicates the same code. Combine the functionality of both these functions and remove the duplicate. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
This commit is contained in:
Andrei Otcheretianski
Jouni Malinen
parent
74b6884306
commit
cb90aa3acf
6 changed files with 76 additions and 276 deletions
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@ -2495,35 +2495,6 @@ const u8 * get_ie(const u8 *ies, size_t len, u8 eid)
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}
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/**
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* get_ie_nth - Fetch a specified information element from IEs buffer
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* @ies: Information elements buffer
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* @len: Information elements buffer length
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* @eid: Information element identifier (WLAN_EID_*)
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* @nth: Return the nth element of the requested type (2 returns the second)
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* Returns: Pointer to the information element (id field) or %NULL if not found
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*
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* This function returns the nth matching information element in the IEs
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* buffer or %NULL in case the element is not found.
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*/
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const u8 * get_ie_nth(const u8 *ies, size_t len, u8 eid, int nth)
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{
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const struct element *elem;
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int sofar = 0;
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if (!ies)
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return NULL;
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for_each_element_id(elem, eid, ies, len) {
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sofar++;
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if (sofar == nth)
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return &elem->id;
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}
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return NULL;
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}
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/**
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* get_ie_ext - Fetch a specified extended information element from IEs buffer
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* @ies: Information elements buffer
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@ -261,7 +261,6 @@ extern const struct oper_class_map global_op_class[];
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extern size_t global_op_class_size;
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const u8 * get_ie(const u8 *ies, size_t len, u8 eid);
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const u8 * get_ie_nth(const u8 *ies, size_t len, u8 eid, int nth);
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const u8 * get_ie_ext(const u8 *ies, size_t len, u8 ext);
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const u8 * get_vendor_ie(const u8 *ies, size_t len, u32 vendor_type);
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@ -13,6 +13,7 @@
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#include "common/ieee802_11_defs.h"
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#include "drivers/driver.h"
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#include "eap_peer/eap.h"
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#include "rsn_supp/wpa.h"
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#include "wpa_supplicant_i.h"
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#include "config.h"
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#include "notify.h"
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@ -1222,22 +1223,6 @@ const u8 * wpa_bss_get_ie(const struct wpa_bss *bss, u8 ie)
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}
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/**
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* wpa_bss_get_ie_nth - Fetch a specified information element from a BSS entry
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* @bss: BSS table entry
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* @ie: Information element identitifier (WLAN_EID_*)
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* @nth: Return the nth element of the requested type (2 returns the second)
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* Returns: Pointer to the information element (id field) or %NULL if not found
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*
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* This function returns the nth matching information element in the BSS
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* entry.
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*/
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const u8 * wpa_bss_get_ie_nth(const struct wpa_bss *bss, u8 ie, int nth)
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{
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return get_ie_nth(wpa_bss_ie_ptr(bss), bss->ie_len, ie, nth);
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}
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/**
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* wpa_bss_get_ie_ext - Fetch a specified extended IE from a BSS entry
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* @bss: BSS table entry
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@ -1501,7 +1486,8 @@ static void
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wpa_bss_parse_ml_rnr_ap_info(struct wpa_supplicant *wpa_s,
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struct wpa_bss *bss, u8 mbssid_idx,
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const struct ieee80211_neighbor_ap_info *ap_info,
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size_t len, u16 *seen, u16 *missing)
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size_t len, u16 *seen, u16 *missing,
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struct wpa_ssid *ssid)
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{
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const u8 *pos, *end;
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const u8 *mld_params;
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@ -1525,12 +1511,15 @@ wpa_bss_parse_ml_rnr_ap_info(struct wpa_supplicant *wpa_s,
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pos += sizeof(*ap_info);
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for (i = 0; i < count; i++) {
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u8 bss_params;
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if (bss->n_mld_links >= MAX_NUM_MLD_LINKS)
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return;
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if (end - pos < ap_info->tbtt_info_len)
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break;
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bss_params = pos[1 + ETH_ALEN + 4];
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mld_params = pos + mld_params_offset;
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link_id = *(mld_params + 1) & EHT_ML_LINK_ID_MSK;
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@ -1546,7 +1535,13 @@ wpa_bss_parse_ml_rnr_ap_info(struct wpa_supplicant *wpa_s,
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wpa_printf(MSG_DEBUG, "MLD: mld ID=%u, link ID=%u",
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*mld_params, link_id);
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if (neigh_bss) {
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if (!neigh_bss) {
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*missing |= BIT(link_id);
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} else if (!ssid ||
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(bss_params & (RNR_BSS_PARAM_SAME_SSID |
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RNR_BSS_PARAM_CO_LOCATED)) ||
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wpa_scan_res_match(wpa_s, 0, neigh_bss,
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ssid, 1, 0)) {
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struct mld_link *l;
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l = &bss->mld_links[bss->n_mld_links];
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@ -1555,8 +1550,6 @@ wpa_bss_parse_ml_rnr_ap_info(struct wpa_supplicant *wpa_s,
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ETH_ALEN);
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l->freq = neigh_bss->freq;
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bss->n_mld_links++;
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} else {
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*missing |= BIT(link_id);
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}
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}
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@ -1573,6 +1566,7 @@ wpa_bss_parse_ml_rnr_ap_info(struct wpa_supplicant *wpa_s,
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* @link_info: Array to store link information (or %NULL),
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* should be initialized and #MAX_NUM_MLD_LINKS elements long
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* @missing_links: Result bitmask of links that were not discovered (or %NULL)
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* @ssid: Target SSID (or %NULL)
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* Returns: 0 on success or -1 for non-MLD or parsing failures
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*
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* Parses the Basic Multi-Link element of the BSS into @link_info using the scan
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@ -1583,7 +1577,8 @@ wpa_bss_parse_ml_rnr_ap_info(struct wpa_supplicant *wpa_s,
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int wpa_bss_parse_basic_ml_element(struct wpa_supplicant *wpa_s,
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struct wpa_bss *bss,
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u8 *ap_mld_addr,
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u16 *missing_links)
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u16 *missing_links,
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struct wpa_ssid *ssid)
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{
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struct ieee802_11_elems elems;
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struct wpabuf *mlbuf;
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@ -1624,6 +1619,32 @@ int wpa_bss_parse_basic_ml_element(struct wpa_supplicant *wpa_s,
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ml_ie_len = wpabuf_len(mlbuf);
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if (ssid) {
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struct wpa_ie_data ie;
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if (!elems.rsn_ie ||
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wpa_parse_wpa_ie(elems.rsn_ie - 2, 2 + elems.rsn_ie_len,
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&ie)) {
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wpa_dbg(wpa_s, MSG_DEBUG, "MLD: No RSN element");
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goto out;
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}
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if (!(ie.capabilities & WPA_CAPABILITY_MFPC) ||
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wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION) {
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wpa_dbg(wpa_s, MSG_DEBUG,
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"MLD: No management frame protection");
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goto out;
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}
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ie.key_mgmt &= ~(WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK |
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WPA_KEY_MGMT_PSK_SHA256);
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if (!(ie.key_mgmt & ssid->key_mgmt)) {
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wpa_dbg(wpa_s, MSG_DEBUG,
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"MLD: No valid key management");
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goto out;
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}
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}
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/*
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* for ext ID + 2 control + common info len + MLD address +
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* link info
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@ -1703,7 +1724,7 @@ int wpa_bss_parse_basic_ml_element(struct wpa_supplicant *wpa_s,
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wpa_bss_parse_ml_rnr_ap_info(wpa_s, bss, mbssid_idx,
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ap_info, len, &seen,
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&missing);
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&missing, ssid);
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pos += ap_info_len;
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len -= ap_info_len;
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@ -171,7 +171,6 @@ struct wpa_bss * wpa_bss_get_id(struct wpa_supplicant *wpa_s, unsigned int id);
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struct wpa_bss * wpa_bss_get_id_range(struct wpa_supplicant *wpa_s,
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unsigned int idf, unsigned int idl);
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const u8 * wpa_bss_get_ie(const struct wpa_bss *bss, u8 ie);
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const u8 * wpa_bss_get_ie_nth(const struct wpa_bss *bss, u8 ie, int nth);
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const u8 * wpa_bss_get_ie_ext(const struct wpa_bss *bss, u8 ext);
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const u8 * wpa_bss_get_vendor_ie(const struct wpa_bss *bss, u32 vendor_type);
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const u8 * wpa_bss_get_vendor_ie_beacon(const struct wpa_bss *bss,
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@ -216,7 +215,8 @@ void calculate_update_time(const struct os_reltime *fetch_time,
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int wpa_bss_parse_basic_ml_element(struct wpa_supplicant *wpa_s,
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struct wpa_bss *bss,
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u8 *ap_mld_addr,
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u16 *missing_links);
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u16 *missing_links,
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struct wpa_ssid *ssid);
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u16 wpa_bss_parse_reconf_ml_element(struct wpa_supplicant *wpa_s,
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struct wpa_bss *bss);
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@ -1153,7 +1153,7 @@ static bool wpas_valid_ml_bss(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
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{
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u16 removed_links;
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if (wpa_bss_parse_basic_ml_element(wpa_s, bss, NULL, NULL))
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if (wpa_bss_parse_basic_ml_element(wpa_s, bss, NULL, NULL, NULL))
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return true;
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if (bss->n_mld_links == 0)
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@ -1878,7 +1878,8 @@ static int wpa_supplicant_connect_ml_missing(struct wpa_supplicant *wpa_s,
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/* Try to resolve any missing link information */
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if (wpa_bss_parse_basic_ml_element(wpa_s, selected, NULL,
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&missing_links) || !missing_links)
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&missing_links, ssid) ||
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!missing_links)
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return 0;
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removed_links = wpa_bss_parse_reconf_ml_element(wpa_s, selected);
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@ -378,225 +378,6 @@ static void sme_auth_handle_rrm(struct wpa_supplicant *wpa_s,
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}
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static void wpas_process_tbtt_info(struct wpa_supplicant *wpa_s, const u8 *data)
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{
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struct wpa_bss *neigh_bss;
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const u8 *bssid;
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u8 bss_params;
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u8 link_id;
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/* TBTT Information field
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* Neighbor AP TBTT Offset[1]
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* BSSID[6]
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* Short SSID[4]
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* BSS parameters[1]
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* 20 MHz PSD[1]
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* MLD Parameters[3]
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* B0..B7: AP MLD ID
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* B7..B11: Link ID
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* B12..B19: BSS Parameters Change Count
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* B20: All Updates Included
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* B21: Disabled Link Indication */
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bssid = data + 1;
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bss_params = data[1 + ETH_ALEN + 4];
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data += 13; /* MLD Parameters */
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link_id = *(data + 1) & 0xF;
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wpa_dbg(wpa_s, MSG_DEBUG,
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"MLD: mld ID=%u, link ID=%u, bssid=" MACSTR ", bss_params=0x%x",
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*data, link_id, MAC2STR(bssid), bss_params);
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if (*data) {
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wpa_printf(MSG_DEBUG, "MLD: Reported link not part of MLD");
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return;
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}
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neigh_bss = wpa_bss_get_bssid(wpa_s, bssid);
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if (!neigh_bss) {
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wpa_printf(MSG_DEBUG, "MLD: Neighbor not found in scan");
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return;
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}
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if (!((bss_params & RNR_BSS_PARAM_SAME_SSID) &&
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(bss_params & RNR_BSS_PARAM_CO_LOCATED)) &&
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!wpa_scan_res_match(wpa_s, 0, neigh_bss, wpa_s->current_ssid,
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1, 0)) {
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wpa_printf(MSG_DEBUG,
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"MLD: Neighbor doesn't match current SSID - skip link");
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return;
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}
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wpa_s->valid_links |= BIT(link_id);
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os_memcpy(wpa_s->links[link_id].bssid, bssid, ETH_ALEN);
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wpa_s->links[link_id].freq = neigh_bss->freq;
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}
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static void wpas_process_rnr(struct wpa_supplicant *wpa_s, const u8 *pos,
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size_t rnr_ie_len)
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{
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while (rnr_ie_len > sizeof(struct ieee80211_neighbor_ap_info)) {
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const struct ieee80211_neighbor_ap_info *ap_info =
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(const struct ieee80211_neighbor_ap_info *) pos;
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/* The first TBTT Information field */
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const u8 *data = ap_info->data;
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u8 tbtt_count;
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size_t len;
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int tbtt_i;
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if (rnr_ie_len < sizeof(struct ieee80211_neighbor_ap_info))
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break;
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tbtt_count = (ap_info->tbtt_info_hdr >> 4) + 1;
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len = sizeof(struct ieee80211_neighbor_ap_info) +
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ap_info->tbtt_info_len * tbtt_count;
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wpa_printf(MSG_DEBUG, "MLD: op_class=%u, channel=%u",
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ap_info->op_class, ap_info->channel);
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if (len > rnr_ie_len)
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break;
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if (ap_info->tbtt_info_len < 16) {
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rnr_ie_len -= len;
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pos += len;
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continue;
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}
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for (tbtt_i = 0; tbtt_i < tbtt_count; tbtt_i++) {
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wpas_process_tbtt_info(wpa_s, data);
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data += ap_info->tbtt_info_len;
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}
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rnr_ie_len -= len;
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pos += len;
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}
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}
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static bool wpas_ml_element(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
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struct wpa_ssid *ssid)
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{
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struct wpabuf *mlbuf;
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const u8 *rnr_ie, *rsn_ie;
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struct wpa_ie_data ie;
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u8 ml_ie_len;
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const struct ieee80211_eht_ml *eht_ml;
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const struct eht_ml_basic_common_info *ml_basic_common_info;
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struct ieee802_11_elems elems;
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u8 i;
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const u16 control =
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host_to_le16(MULTI_LINK_CONTROL_TYPE_BASIC |
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BASIC_MULTI_LINK_CTRL_PRES_LINK_ID |
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BASIC_MULTI_LINK_CTRL_PRES_BSS_PARAM_CH_COUNT |
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BASIC_MULTI_LINK_CTRL_PRES_MLD_CAPA);
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bool ret = false;
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int rnr_idx;
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if (!(wpa_s->drv_flags2 & WPA_DRIVER_FLAGS2_MLO))
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return false;
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if (ieee802_11_parse_elems(wpa_bss_ie_ptr(bss),
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bss->ie_len, &elems, 1) == ParseFailed)
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return false;
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mlbuf = ieee802_11_defrag(elems.basic_mle, elems.basic_mle_len, true);
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if (!mlbuf) {
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wpa_dbg(wpa_s, MSG_DEBUG, "MLD: No ML element");
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return false;
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}
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rsn_ie = wpa_bss_get_ie(bss, WLAN_EID_RSN);
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if (!rsn_ie || wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
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wpa_dbg(wpa_s, MSG_DEBUG, "MLD: No RSN element");
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goto out;
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}
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if (!(ie.capabilities & WPA_CAPABILITY_MFPC) ||
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wpas_get_ssid_pmf(wpa_s, ssid) == NO_MGMT_FRAME_PROTECTION) {
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wpa_dbg(wpa_s, MSG_DEBUG,
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"MLD: No management frame protection");
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goto out;
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}
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ie.key_mgmt &= ~(WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_FT_PSK |
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WPA_KEY_MGMT_PSK_SHA256);
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if (!(ie.key_mgmt & ssid->key_mgmt)) {
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wpa_dbg(wpa_s, MSG_DEBUG, "MLD: No valid key management");
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goto out;
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}
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ml_ie_len = wpabuf_len(mlbuf);
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/* control + common info len + MLD address + MLD link information */
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if (ml_ie_len < 2 + 1 + ETH_ALEN + 1)
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goto out;
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eht_ml = wpabuf_head(mlbuf);
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if ((eht_ml->ml_control & control) != control) {
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wpa_printf(MSG_DEBUG, "MLD: Unexpected ML element control=0x%x",
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eht_ml->ml_control);
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goto out;
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}
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ml_basic_common_info =
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(const struct eht_ml_basic_common_info *) eht_ml->variable;
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/* common info length should be valid (self, mld_addr, link_id) */
|
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if (ml_basic_common_info->len < 1 + ETH_ALEN + 1)
|
||||
goto out;
|
||||
|
||||
/* get the MLD address and MLD link ID */
|
||||
os_memcpy(wpa_s->ap_mld_addr, ml_basic_common_info->mld_addr,
|
||||
ETH_ALEN);
|
||||
wpa_s->mlo_assoc_link_id = ml_basic_common_info->variable[0] &
|
||||
EHT_ML_LINK_ID_MSK;
|
||||
|
||||
os_memcpy(wpa_s->links[wpa_s->mlo_assoc_link_id].bssid, bss->bssid,
|
||||
ETH_ALEN);
|
||||
wpa_s->links[wpa_s->mlo_assoc_link_id].freq = bss->freq;
|
||||
|
||||
wpa_printf(MSG_DEBUG, "MLD: address=" MACSTR ", link ID=%u",
|
||||
MAC2STR(wpa_s->ap_mld_addr), wpa_s->mlo_assoc_link_id);
|
||||
|
||||
wpa_s->valid_links = BIT(wpa_s->mlo_assoc_link_id);
|
||||
|
||||
ret = true;
|
||||
|
||||
/* Process all Reduced Neighbor Report elements */
|
||||
for (rnr_idx = 1; ; rnr_idx++) {
|
||||
rnr_ie = wpa_bss_get_ie_nth(bss,
|
||||
WLAN_EID_REDUCED_NEIGHBOR_REPORT,
|
||||
rnr_idx);
|
||||
if (!rnr_ie) {
|
||||
if (rnr_idx == 0) {
|
||||
wpa_dbg(wpa_s, MSG_DEBUG,
|
||||
"MLD: No RNR element");
|
||||
goto out;
|
||||
}
|
||||
break;
|
||||
}
|
||||
wpas_process_rnr(wpa_s, rnr_ie + 2, rnr_ie[1]);
|
||||
}
|
||||
|
||||
wpa_printf(MSG_DEBUG, "MLD: valid_links=0x%x", wpa_s->valid_links);
|
||||
|
||||
for (i = 0; i < MAX_NUM_MLD_LINKS; i++) {
|
||||
if (!(wpa_s->valid_links & BIT(i)))
|
||||
continue;
|
||||
|
||||
wpa_printf(MSG_DEBUG, "MLD: link=%u, bssid=" MACSTR,
|
||||
i, MAC2STR(wpa_s->links[i].bssid));
|
||||
}
|
||||
|
||||
out:
|
||||
wpabuf_free(mlbuf);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
static void wpas_ml_handle_removed_links(struct wpa_supplicant *wpa_s,
|
||||
struct wpa_bss *bss)
|
||||
{
|
||||
|
|
@ -737,6 +518,27 @@ out:
|
|||
}
|
||||
|
||||
|
||||
static void wpas_sme_set_mlo_links(struct wpa_supplicant *wpa_s,
|
||||
struct wpa_bss *bss)
|
||||
{
|
||||
int i;
|
||||
|
||||
wpa_s->valid_links = 0;
|
||||
|
||||
for (i = 0; i < bss->n_mld_links; i++) {
|
||||
u8 link_id = bss->mld_links[i].link_id;
|
||||
const u8 *bssid = bss->mld_links[i].bssid;
|
||||
|
||||
if (i == 0)
|
||||
wpa_s->mlo_assoc_link_id = link_id;
|
||||
wpa_s->valid_links |= BIT(link_id);
|
||||
os_memcpy(wpa_s->links[link_id].bssid, bssid, ETH_ALEN);
|
||||
wpa_s->links[link_id].freq = bss->mld_links[i].freq;
|
||||
wpa_s->links[link_id].bss = wpa_bss_get_bssid(wpa_s, bssid);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void sme_send_authentication(struct wpa_supplicant *wpa_s,
|
||||
struct wpa_bss *bss, struct wpa_ssid *ssid,
|
||||
int start)
|
||||
|
|
@ -769,8 +571,14 @@ static void sme_send_authentication(struct wpa_supplicant *wpa_s,
|
|||
}
|
||||
|
||||
os_memset(¶ms, 0, sizeof(params));
|
||||
if (wpas_ml_element(wpa_s, bss, ssid)) {
|
||||
|
||||
if ((wpa_s->drv_flags2 & WPA_DRIVER_FLAGS2_MLO) &&
|
||||
!wpa_bss_parse_basic_ml_element(wpa_s, bss, wpa_s->ap_mld_addr,
|
||||
NULL, ssid) &&
|
||||
bss->n_mld_links) {
|
||||
wpa_printf(MSG_DEBUG, "MLD: In authentication");
|
||||
wpas_sme_set_mlo_links(wpa_s, bss);
|
||||
|
||||
#ifdef CONFIG_TESTING_OPTIONS
|
||||
bss = wpas_ml_connect_pref(wpa_s, bss);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue