iw: parse michael MIC failure event

Add code to iw to parse the MMIC failure
event and print out the cause and key
information.

diff --git a/event.c b/event.c
index 78c6958f51fd11ffb2f0aca6d7b56d204ff4f686..7331fd53f6452e67d326bb0b39d94fd8e71a0d1b 100644 (file)
--- a/event.c
+++ b/event.c
@@ -137,6 +137,51 @@ static void parse_cqm_event(struct nlattr **attrs)
                printf("unknown event\n");
 }
 
+static const char * key_type_str(enum nl80211_key_type key_type)
+{
+       static char buf[30];
+       switch (key_type) {
+       case NL80211_KEYTYPE_GROUP:
+               return "Group";
+       case NL80211_KEYTYPE_PAIRWISE:
+               return "Pairwise";
+       case NL80211_KEYTYPE_PEERKEY:
+               return "PeerKey";
+       default:
+               snprintf(buf, sizeof(buf), "unknown(%d)", key_type);
+               return buf;
+       }
+}
+
+static void parse_mic_failure(struct nlattr **attrs)
+{
+       printf("Michael MIC failure event:");
+
+       if (attrs[NL80211_ATTR_MAC]) {
+               char addr[3 * ETH_ALEN];
+               mac_addr_n2a(addr, nla_data(attrs[NL80211_ATTR_MAC]));
+               printf(" source MAC address %s", addr);
+       }
+
+       if (attrs[NL80211_ATTR_KEY_SEQ] &&
+           nla_len(attrs[NL80211_ATTR_KEY_SEQ]) == 6) {
+               unsigned char *seq = nla_data(attrs[NL80211_ATTR_KEY_SEQ]);
+               printf(" seq=%02x%02x%02x%02x%02x%02x",
+                      seq[0], seq[1], seq[2], seq[3], seq[4], seq[5]);
+       }
+       if (attrs[NL80211_ATTR_KEY_TYPE]) {
+               enum nl80211_key_type key_type =
+                       nla_get_u32(attrs[NL80211_ATTR_KEY_TYPE]);
+               printf(" Key Type %s", key_type_str(key_type));
+       }
+
+       if (attrs[NL80211_ATTR_KEY_IDX]) {
+               __u8 key_id = nla_get_u8(attrs[NL80211_ATTR_KEY_IDX]);
+               printf(" Key Id %d", key_id);
+       }
+
+       printf("\n");
+}
 
 static int print_event(struct nl_msg *msg, void *arg)
 {
@@ -371,6 +416,9 @@ static int print_event(struct nl_msg *msg, void *arg)
        case NL80211_CMD_NOTIFY_CQM:
                parse_cqm_event(tb);
                break;
+       case NL80211_CMD_MICHAEL_MIC_FAILURE:
+               parse_mic_failure(tb);
+               break;
        default:
                printf("unknown event %d\n", gnlh->cmd);
                break;