From fd85192a54926bd1bbba564228682630b8448c21 Mon Sep 17 00:00:00 2001
From: James Prestwood <prestwoj@gmail.com>
Date: Thu, 4 Nov 2021 10:57:54 -0700
Subject: [PATCH] scan: parse Proxy ARP bit from extended capabilities

---
 src/scan.c | 17 +++++++++++++++++
 src/scan.h |  1 +
 2 files changed, 18 insertions(+)

diff --git a/src/scan.c b/src/scan.c
index be5953ad..2a96943b 100644
--- a/src/scan.c
+++ b/src/scan.c
@@ -1252,6 +1252,23 @@ static bool scan_parse_bss_information_elements(struct scan_bss *bss,
 			bss->rc_ie = l_memdup(iter.data - 2, iter.len + 2);
 
 			break;
+
+		case IE_TYPE_EXTENDED_CAPABILITIES:
+			/* 802.11-2020 9.4.2.26
+			 *
+			 * "The length of the Extended Capabilities field is
+			 * variable. If fewer bits are received in an Extended
+			 * Capabilities field than shown in Table 9-153, the
+			 * rest of the Extended Capabilities field bits are
+			 * assumed to be zero"
+			 *
+			 * Currently only Proxy ARP bit (12) is checked, and if
+			 * not found, this is not a fatal error.
+			 */
+			if (iter.len < 2)
+				break;
+
+			bss->proxy_arp = test_bit(iter.data, 12);
 		}
 	}
 
diff --git a/src/scan.h b/src/scan.h
index 22981585..0378ccca 100644
--- a/src/scan.h
+++ b/src/scan.h
@@ -86,6 +86,7 @@ struct scan_bss {
 	bool anqp_capable : 1;
 	bool hs20_capable : 1;
 	bool force_default_sae_group : 1;
+	bool proxy_arp : 1;
 	uint8_t cost_level : 3;
 	uint8_t cost_flags : 4;
 };