nl80211: Support PMKSA candidate events

This adds support for RSN pre-authentication with nl80211 interface and
drivers that handle roaming internally (i.e., wpa_supplicant is not
responsible for requesting scan results that provide the needed
information without these events).

diff --git a/src/drivers/driver_nl80211.c b/src/drivers/driver_nl80211.c
index 625d7f2201c67abc348440a5d44ae13f32347297..0cd4cfb4a033621f4d0a65543aec2e99311672b6 100644 (file)
--- a/src/drivers/driver_nl80211.c
+++ b/src/drivers/driver_nl80211.c
@@ -1471,6 +1471,40 @@ static void nl80211_rekey_offload_event(struct wpa_driver_nl80211_data *drv,
 }
 
 
+static void nl80211_pmksa_candidate_event(struct wpa_driver_nl80211_data *drv,
+                                         struct nlattr **tb)
+{
+       struct nlattr *cand[NUM_NL80211_PMKSA_CANDIDATE];
+       static struct nla_policy cand_policy[NUM_NL80211_PMKSA_CANDIDATE] = {
+               [NL80211_PMKSA_CANDIDATE_INDEX] = { .type = NLA_U32 },
+               [NL80211_PMKSA_CANDIDATE_BSSID] = {
+                       .minlen = ETH_ALEN,
+                       .maxlen = ETH_ALEN,
+               },
+               [NL80211_PMKSA_CANDIDATE_PREAUTH] = { .type = NLA_FLAG },
+       };
+       union wpa_event_data data;
+
+       if (!tb[NL80211_ATTR_PMKSA_CANDIDATE])
+               return;
+       if (nla_parse_nested(cand, MAX_NL80211_PMKSA_CANDIDATE,
+                            tb[NL80211_ATTR_PMKSA_CANDIDATE], cand_policy))
+               return;
+       if (!cand[NL80211_PMKSA_CANDIDATE_INDEX] ||
+           !cand[NL80211_PMKSA_CANDIDATE_BSSID])
+               return;
+
+       os_memset(&data, 0, sizeof(data));
+       os_memcpy(data.pmkid_candidate.bssid,
+                 nla_data(cand[NL80211_PMKSA_CANDIDATE_BSSID]), ETH_ALEN);
+       data.pmkid_candidate.index =
+               nla_get_u32(cand[NL80211_PMKSA_CANDIDATE_INDEX]);
+       data.pmkid_candidate.preauth =
+               cand[NL80211_PMKSA_CANDIDATE_PREAUTH] != NULL;
+       wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
+}
+
+
 static int process_event(struct nl_msg *msg, void *arg)
 {
        struct wpa_driver_nl80211_data *drv = arg;
@@ -1578,6 +1612,9 @@ static int process_event(struct nl_msg *msg, void *arg)
        case NL80211_CMD_SET_REKEY_OFFLOAD:
                nl80211_rekey_offload_event(drv, tb);
                break;
+       case NL80211_CMD_PMKSA_CANDIDATE:
+               nl80211_pmksa_candidate_event(drv, tb);
+               break;
        default:
                wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
                           "(cmd=%d)", gnlh->cmd);