[PATCH v3 03/21] EHT: Add support to parse Multi-Link elements

[Veerendranath Jakkam]

Parse and store pointers to different types of Multi-Link elements
received in management frames.

Signed-off-by: Veerendranath Jakkam <quic_vjakkam at quicinc.com>
---
 src/common/ieee802_11_common.c | 46 ++++++++++++++++++++++++++++++++++
 src/common/ieee802_11_common.h | 10 ++++++++
 2 files changed, 56 insertions(+)

diff --git a/src/common/ieee802_11_common.c b/src/common/ieee802_11_common.c
index d97525e9f..966861c17 100644
--- a/src/common/ieee802_11_common.c
+++ b/src/common/ieee802_11_common.c
@@ -199,6 +199,46 @@ static int ieee802_11_parse_vendor_specific(const u8 *pos, size_t elen,
 }
 
 
+static int ieee802_11_parse_mle(const u8 *pos, size_t elen,
+				struct ieee802_11_elems *elems,
+				int show_errors)
+{
+	u8 mle_type = pos[0] & MULTI_LINK_CONTROL_TYPE_MASK;
+
+	switch (mle_type) {
+	case MULTI_LINK_CONTROL_TYPE_BASIC:
+		elems->basic_mle = pos;
+		elems->basic_mle_len = elen;
+		break;
+	case MULTI_LINK_CONTROL_TYPE_PROBE_REQ:
+		elems->probe_req_mle = pos;
+		elems->probe_req_mle_len = elen;
+		break;
+	case MULTI_LINK_CONTROL_TYPE_RECONF:
+		elems->reconf_mle = pos;
+		elems->reconf_mle_len = elen;
+		break;
+	case MULTI_LINK_CONTROL_TYPE_TDLS:
+		elems->tdls_mle = pos;
+		elems->tdls_mle_len = elen;
+		break;
+	case MULTI_LINK_CONTROL_TYPE_PRIOR_ACCESS:
+		elems->prior_access_mle = pos;
+		elems->prior_access_mle_len = elen;
+		break;
+	default:
+		if (show_errors) {
+			wpa_printf(MSG_MSGDUMP,
+				   "Unknown Multi-Link element type %u",
+				   mle_type);
+		}
+		return -1;
+	}
+
+	return 0;
+}
+
+
 static int ieee802_11_parse_extension(const u8 *pos, size_t elen,
 				      struct ieee802_11_elems *elems,
 				      int show_errors)
@@ -315,6 +355,12 @@ static int ieee802_11_parse_extension(const u8 *pos, size_t elen,
 		elems->eht_operation = pos;
 		elems->eht_operation_len = elen;
 		break;
+	case WLAN_EID_EXT_MULTI_LINK:
+		if (elen < 2)
+			break;
+		if (ieee802_11_parse_mle(pos, elen, elems, show_errors))
+			return -1;
+		break;
 	default:
 		if (show_errors) {
 			wpa_printf(MSG_MSGDUMP,
diff --git a/src/common/ieee802_11_common.h b/src/common/ieee802_11_common.h
index c3a3234b3..ff6d2a89f 100644
--- a/src/common/ieee802_11_common.h
+++ b/src/common/ieee802_11_common.h
@@ -119,6 +119,11 @@ struct ieee802_11_elems {
 	const u8 *pasn_params;
 	const u8 *eht_capabilities;
 	const u8 *eht_operation;
+	const u8 *basic_mle;
+	const u8 *probe_req_mle;
+	const u8 *reconf_mle;
+	const u8 *tdls_mle;
+	const u8 *prior_access_mle;
 
 	u8 ssid_len;
 	u8 supp_rates_len;
@@ -175,6 +180,11 @@ struct ieee802_11_elems {
 	u8 pasn_params_len;
 	u8 eht_capabilities_len;
 	u8 eht_operation_len;
+	u8 basic_mle_len;
+	u8 probe_req_mle_len;
+	u8 reconf_mle_len;
+	u8 tdls_mle_len;
+	u8 prior_access_mle_len;
 
 	struct mb_ies_info mb_ies;
 	struct frag_ies_info frag_ies;
-- 
2.25.1