From: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Date: Thu, 3 Nov 2022 08:08:45 +0000 (+0530)
Subject: MLD STA: Set MLO connection info to wpa_sm
X-Git-Tag: hostap_2_11~1561
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=472a0b8d6069b9730041d0109942661b3f13ca0b;p=thirdparty%2Fhostap.git

MLD STA: Set MLO connection info to wpa_sm

Update the following MLO connection information to wpa_sm:
- AP MLD address and link ID of the (re)association link.
- Bitmap of requested links and accepted links
- Own link address for each requested link
- AP link address, RSNE and RSNXE for each requested link

Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
---

diff --git a/src/rsn_supp/wpa.c b/src/rsn_supp/wpa.c
index 3a9d03bda..ea32858d0 100644
--- a/src/rsn_supp/wpa.c
+++ b/src/rsn_supp/wpa.c
@@ -37,6 +37,27 @@
 static const u8 null_rsc[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
 
 
+static void wpa_hexdump_link(int level, u8 link_id, const char *title,
+			     const void *buf, size_t len)
+{
+	char *link_title = NULL;
+
+	if (link_id >= MAX_NUM_MLD_LINKS)
+		goto out;
+
+	link_title = os_malloc(os_strlen(title) + 20);
+	if (!link_title)
+		goto out;
+
+	os_snprintf(link_title, os_strlen(title) + 20, "MLO link[%u]: %s",
+		    link_id, title);
+
+out:
+	wpa_hexdump(level, link_title ? link_title : title, buf, len);
+	os_free(link_title);
+}
+
+
 /**
  * wpa_eapol_key_send - Send WPA/RSN EAPOL-Key message
  * @sm: Pointer to WPA state machine data from wpa_sm_init()
@@ -3006,6 +3027,8 @@ struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx)
  */
 void wpa_sm_deinit(struct wpa_sm *sm)
 {
+	int i;
+
 	if (sm == NULL)
 		return;
 	pmksa_cache_deinit(sm->pmksa);
@@ -3016,6 +3039,10 @@ void wpa_sm_deinit(struct wpa_sm *sm)
 	os_free(sm->ap_wpa_ie);
 	os_free(sm->ap_rsn_ie);
 	os_free(sm->ap_rsnxe);
+	for (i = 0; i < MAX_NUM_MLD_LINKS; i++) {
+		os_free(sm->mlo.links[i].ap_rsne);
+		os_free(sm->mlo.links[i].ap_rsnxe);
+	}
 	wpa_sm_drop_sa(sm);
 	os_free(sm->ctx);
 #ifdef CONFIG_IEEE80211R
@@ -3304,6 +3331,81 @@ void wpa_sm_set_config(struct wpa_sm *sm, struct rsn_supp_config *config)
 }
 
 
+int wpa_sm_set_mlo_params(struct wpa_sm *sm, const struct wpa_sm_mlo *mlo)
+{
+	int i;
+
+	if (!sm)
+		return -1;
+
+	os_memcpy(sm->mlo.ap_mld_addr, mlo->ap_mld_addr, ETH_ALEN);
+	sm->mlo.assoc_link_id =  mlo->assoc_link_id;
+	sm->mlo.valid_links = mlo->valid_links;
+	sm->mlo.req_links = mlo->req_links;
+
+	for (i = 0; i < MAX_NUM_MLD_LINKS; i++) {
+		const u8 *ie;
+		size_t len;
+
+		if (sm->mlo.req_links & BIT(i)) {
+			if (!mlo->links[i].ap_rsne ||
+			    mlo->links[i].ap_rsne_len == 0) {
+				wpa_dbg(sm->ctx->msg_ctx, MSG_INFO,
+					"RSN: No RSNE for AP MLO link %d with BSSID "
+					MACSTR,
+					i, MAC2STR(mlo->links[i].bssid));
+				return -1;
+
+			}
+			os_memcpy(sm->mlo.links[i].addr, mlo->links[i].addr,
+				  ETH_ALEN);
+			os_memcpy(sm->mlo.links[i].bssid, mlo->links[i].bssid,
+				  ETH_ALEN);
+		}
+
+		ie = mlo->links[i].ap_rsne;
+		len = mlo->links[i].ap_rsne_len;
+		os_free(sm->mlo.links[i].ap_rsne);
+		if (!ie || len == 0) {
+			wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
+				"RSN: Clearing MLO link[%u] AP RSNE", i);
+			sm->mlo.links[i].ap_rsne = NULL;
+			sm->mlo.links[i].ap_rsne_len = 0;
+		} else {
+			wpa_hexdump_link(MSG_DEBUG, i, "RSN: Set AP RSNE",
+					 ie, len);
+			sm->mlo.links[i].ap_rsne = os_memdup(ie, len);
+			if (!sm->mlo.links[i].ap_rsne) {
+				sm->mlo.links[i].ap_rsne_len = 0;
+				return -1;
+			}
+			sm->mlo.links[i].ap_rsne_len = len;
+		}
+
+		ie = mlo->links[i].ap_rsnxe;
+		len = mlo->links[i].ap_rsnxe_len;
+		os_free(sm->mlo.links[i].ap_rsnxe);
+		if (!ie || len == 0) {
+			wpa_dbg(sm->ctx->msg_ctx, MSG_DEBUG,
+				"RSN: Clearing MLO link[%u] AP RSNXE", i);
+			sm->mlo.links[i].ap_rsnxe = NULL;
+			sm->mlo.links[i].ap_rsnxe_len = 0;
+		} else {
+			wpa_hexdump_link(MSG_DEBUG, i, "RSN: Set AP RSNXE", ie,
+					 len);
+			sm->mlo.links[i].ap_rsnxe = os_memdup(ie, len);
+			if (!sm->mlo.links[i].ap_rsnxe) {
+				sm->mlo.links[i].ap_rsnxe_len = 0;
+				return -1;
+			}
+			sm->mlo.links[i].ap_rsnxe_len = len;
+		}
+	}
+
+	return 0;
+}
+
+
 /**
  * wpa_sm_set_own_addr - Set own MAC address
  * @sm: Pointer to WPA state machine data from wpa_sm_init()
diff --git a/src/rsn_supp/wpa.h b/src/rsn_supp/wpa.h
index cbeab435c..5c4e3e59c 100644
--- a/src/rsn_supp/wpa.h
+++ b/src/rsn_supp/wpa.h
@@ -145,6 +145,21 @@ struct rsn_supp_config {
 	bool force_kdk_derivation;
 };
 
+struct wpa_sm_link {
+	u8 addr[ETH_ALEN];
+	u8 bssid[ETH_ALEN];
+	u8 *ap_rsne, *ap_rsnxe;
+	size_t ap_rsne_len, ap_rsnxe_len;
+};
+
+struct wpa_sm_mlo {
+	u8 ap_mld_addr[ETH_ALEN];
+	u8 assoc_link_id;
+	u16 valid_links; /* bitmap of accepted links */
+	u16 req_links; /* bitmap of requested links */
+	struct wpa_sm_link links[MAX_NUM_MLD_LINKS];
+};
+
 #ifndef CONFIG_NO_WPA
 
 struct wpa_sm * wpa_sm_init(struct wpa_sm_ctx *ctx);
@@ -224,6 +239,7 @@ void wpa_sm_set_ptk_kck_kek(struct wpa_sm *sm,
 			    const u8 *ptk_kek, size_t ptk_kek_len);
 int wpa_fils_is_completed(struct wpa_sm *sm);
 void wpa_sm_pmksa_cache_reconfig(struct wpa_sm *sm);
+int wpa_sm_set_mlo_params(struct wpa_sm *sm, const struct wpa_sm_mlo *mlo);
 
 #else /* CONFIG_NO_WPA */
 
@@ -438,6 +454,12 @@ static inline void wpa_sm_pmksa_cache_reconfig(struct wpa_sm *sm)
 {
 }
 
+static inline int wpa_sm_set_mlo_params(struct wpa_sm *sm,
+					const struct wpa_sm_mlo *mlo)
+{
+	return 0;
+}
+
 #endif /* CONFIG_NO_WPA */
 
 #ifdef CONFIG_IEEE80211R
diff --git a/src/rsn_supp/wpa_i.h b/src/rsn_supp/wpa_i.h
index 3811c3bc4..f7b056696 100644
--- a/src/rsn_supp/wpa_i.h
+++ b/src/rsn_supp/wpa_i.h
@@ -218,6 +218,7 @@ struct wpa_sm {
 	struct wpabuf *dpp_z;
 	int dpp_pfs;
 #endif /* CONFIG_DPP2 */
+	struct wpa_sm_mlo mlo;
 };
 
 
diff --git a/wpa_supplicant/events.c b/wpa_supplicant/events.c
index f57b058f8..202afa8a5 100644
--- a/wpa_supplicant/events.c
+++ b/wpa_supplicant/events.c
@@ -3410,6 +3410,66 @@ static int wpa_drv_get_mlo_info(struct wpa_supplicant *wpa_s)
 }
 
 
+static int wpa_sm_set_ml_info(struct wpa_supplicant *wpa_s)
+{
+	struct driver_sta_mlo_info drv_mlo;
+	struct wpa_sm_mlo wpa_mlo;
+	const u8 *bss_rsn = NULL, *bss_rsnx = NULL;
+	int i;
+
+	os_memset(&drv_mlo, 0, sizeof(drv_mlo));
+	if (wpas_drv_get_sta_mlo_info(wpa_s, &drv_mlo)) {
+		wpa_dbg(wpa_s, MSG_INFO, "Failed to get MLO link info");
+		return -1;
+	}
+
+	os_memset(&wpa_mlo, 0, sizeof(wpa_mlo));
+	if (!drv_mlo.valid_links)
+		goto out;
+
+	os_memcpy(wpa_mlo.ap_mld_addr, drv_mlo.ap_mld_addr, ETH_ALEN);
+	wpa_mlo.assoc_link_id = drv_mlo.assoc_link_id;
+	wpa_mlo.valid_links = drv_mlo.valid_links;
+	wpa_mlo.req_links = drv_mlo.req_links;
+
+	for (i = 0; i < MAX_NUM_MLD_LINKS; i++) {
+		struct wpa_bss *bss;
+
+		if (!(drv_mlo.req_links & BIT(i)))
+			continue;
+
+		bss = wpa_supplicant_get_new_bss(wpa_s, drv_mlo.links[i].bssid);
+		if (!bss) {
+			wpa_supplicant_update_scan_results(wpa_s);
+			bss = wpa_supplicant_get_new_bss(
+				wpa_s, drv_mlo.links[i].bssid);
+		}
+
+		if (!bss) {
+			wpa_dbg(wpa_s, MSG_INFO,
+				"Failed to get MLO link %d BSS", i);
+			return -1;
+		}
+
+		bss_rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
+		bss_rsnx = wpa_bss_get_ie(bss, WLAN_EID_RSNX);
+
+		wpa_mlo.links[i].ap_rsne = bss_rsn ? (u8 *) bss_rsn : NULL;
+		wpa_mlo.links[i].ap_rsne_len = bss_rsn ? 2 + bss_rsn[1] : 0;
+		wpa_mlo.links[i].ap_rsnxe = bss_rsnx ? (u8 *) bss_rsnx : NULL;
+		wpa_mlo.links[i].ap_rsnxe_len = bss_rsnx ? 2 + bss_rsnx[1] : 0;
+
+		os_memcpy(wpa_mlo.links[i].bssid, drv_mlo.links[i].bssid,
+			  ETH_ALEN);
+		os_memcpy(wpa_mlo.links[i].addr, drv_mlo.links[i].addr,
+			  ETH_ALEN);
+	}
+
+out:
+	return wpa_sm_set_mlo_params(wpa_s->wpa, &wpa_mlo);
+}
+
+
 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
 				       union wpa_event_data *data)
 {
@@ -3534,6 +3594,15 @@ static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
 		wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
 	}
 	wpa_sm_notify_assoc(wpa_s->wpa, bssid);
+
+	if (wpa_sm_set_ml_info(wpa_s)) {
+		wpa_dbg(wpa_s, MSG_INFO,
+			"Failed to set MLO connection info to wpa_sm");
+		wpa_supplicant_deauthenticate(wpa_s,
+					      WLAN_REASON_DEAUTH_LEAVING);
+		return;
+	}
+
 	if (wpa_s->l2)
 		l2_packet_notify_auth_start(wpa_s->l2);
 
diff --git a/wpa_supplicant/wpa_supplicant.c b/wpa_supplicant/wpa_supplicant.c
index ba1c48fca..a56510a48 100644
--- a/wpa_supplicant/wpa_supplicant.c
+++ b/wpa_supplicant/wpa_supplicant.c
@@ -403,6 +403,7 @@ void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s,
 #ifdef CONFIG_WEP
 	int i;
 #endif /* CONFIG_WEP */
+	struct wpa_sm_mlo mlo;
 
 	if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 		wpa_s->key_mgmt = WPA_KEY_MGMT_WPS;
@@ -443,6 +444,8 @@ void wpa_supplicant_set_non_wpa_policy(struct wpa_supplicant *wpa_s,
 			 wpa_s->mgmt_group_cipher);
 
 	pmksa_cache_clear_current(wpa_s->wpa);
+	os_memset(&mlo, 0, sizeof(mlo));
+	wpa_sm_set_mlo_params(wpa_s->wpa, &mlo);
 }