[16/17] netdev: parse michael MIC failure message

Commit Message

James Prestwood Nov. 1, 2022, 8:17 p.m. UTC

This event indicates a security issue. The proper handling would be
to rekey but for now at least provide some information to the user.
---
 src/netdev.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

Patch

diff --git a/src/netdev.c b/src/netdev.c
index 23bbbcf6..ced87191 100644
--- a/src/netdev.c
+++ b/src/netdev.c
@@ -5224,6 +5224,20 @@  static void netdev_channel_switch_event(struct l_genl_msg *msg,
 				&netdev->frequency, netdev->user_data);
 }
 
+static void netdev_michael_mic_failure(struct l_genl_msg *msg,
+					struct netdev *netdev)
+{
+	uint8_t idx;
+	uint32_t type;
+
+	if (nl80211_parse_attrs(msg, NL80211_ATTR_KEY_IDX, &idx,
+				NL80211_ATTR_KEY_TYPE, &type,
+				NL80211_ATTR_UNSPEC) < 0)
+		return;
+
+	l_debug("ifindex=%u key_idx=%u type=%u", netdev->index, idx, type);
+}
+
 static void netdev_mlme_notify(struct l_genl_msg *msg, void *user_data)
 {
 	struct netdev *netdev = NULL;
@@ -5274,6 +5288,9 @@  static void netdev_mlme_notify(struct l_genl_msg *msg, void *user_data)
 	case NL80211_CMD_DEL_STATION:
 		netdev_station_event(msg, netdev, false);
 		break;
+	case NL80211_CMD_MICHAEL_MIC_FAILURE:
+		netdev_michael_mic_failure(msg, netdev);
+		break;
 	}
 }