rndis_wlan: handle 802.11 indications from device

Add handling for 802.11 specific rndis indications.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 232 insertions, 1 deletions

diff --git a/drivers/net/wireless/rndis_wlan.c b/drivers/net/wireless/rndis_wlan.c
index 6b6452b0e8c4..7a50cfa18843 100644
--- a/drivers/net/wireless/rndis_wlan.c
+++ b/drivers/net/wireless/rndis_wlan.c
@@ -201,6 +201,24 @@ enum ndis_80211_priv_filter {
         NDIS_80211_PRIV_8021X_WEP
 };
 
+enum ndis_80211_status_type {
+        NDIS_80211_STATUSTYPE_AUTHENTICATION,
+        NDIS_80211_STATUSTYPE_MEDIASTREAMMODE,
+        NDIS_80211_STATUSTYPE_PMKID_CANDIDATELIST,
+        NDIS_80211_STATUSTYPE_RADIOSTATE,
+};
+
+enum ndis_80211_media_stream_mode {
+        NDIS_80211_MEDIA_STREAM_OFF,
+        NDIS_80211_MEDIA_STREAM_ON
+};
+
+enum ndis_80211_radio_status {
+        NDIS_80211_RADIO_STATUS_ON,
+        NDIS_80211_RADIO_STATUS_HARDWARE_OFF,
+        NDIS_80211_RADIO_STATUS_SOFTWARE_OFF,
+};
+
 enum ndis_80211_addkey_bits {
         NDIS_80211_ADDKEY_8021X_AUTH = cpu_to_le32(1 << 28),
         NDIS_80211_ADDKEY_SET_INIT_RECV_SEQ = cpu_to_le32(1 << 29),
@@ -213,6 +231,35 @@ enum ndis_80211_addwep_bits {
         NDIS_80211_ADDWEP_TRANSMIT_KEY = cpu_to_le32(1 << 31)
 };
 
+struct ndis_80211_auth_request {
+        __le32 length;
+        u8 bssid[6];
+        u8 padding[2];
+        __le32 flags;
+} __attribute__((packed));
+
+struct ndis_80211_pmkid_candidate {
+        u8 bssid[6];
+        u8 padding[2];
+        __le32 flags;
+} __attribute__((packed));
+
+struct ndis_80211_pmkid_cand_list {
+        __le32 version;
+        __le32 num_candidates;
+        struct ndis_80211_pmkid_candidate candidate_list[0];
+} __attribute__((packed));
+
+struct ndis_80211_status_indication {
+        __le32 status_type;
+        union {
+                enum ndis_80211_media_stream_mode       media_stream_mode;
+                enum ndis_80211_radio_status            radio_status;
+                struct ndis_80211_auth_request          auth_request[0];
+                struct ndis_80211_pmkid_cand_list       cand_list;
+        } u;
+} __attribute__((packed));
+
 struct ndis_80211_ssid {
         __le32 length;
         u8 essid[NDIS_802_11_LENGTH_SSID];
@@ -2211,16 +2258,195 @@ static void rndis_wlan_set_multicast_list(struct net_device *dev)
         queue_work(priv->workqueue, &priv->work);
 }
 
+
+static void rndis_wlan_auth_indication(struct usbnet *usbdev,
+                                struct ndis_80211_status_indication *indication,
+                                int len)
+{
+        u8 *buf;
+        const char *type;
+        int flags, buflen;
+        bool pairwise_error, group_error;
+        struct ndis_80211_auth_request *auth_req;
+
+        /* must have at least one array entry */
+        if (len < offsetof(struct ndis_80211_status_indication, u) +
+                                sizeof(struct ndis_80211_auth_request)) {
+                devinfo(usbdev, "authentication indication: "
+                                "too short message (%i)", len);
+                return;
+        }
+
+        buf = (void *)&indication->u.auth_request[0];
+        buflen = len - offsetof(struct ndis_80211_status_indication, u);
+
+        while (buflen >= sizeof(*auth_req)) {
+                auth_req = (void *)buf;
+                type = "unknown";
+                flags = le32_to_cpu(auth_req->flags);
+                pairwise_error = false;
+                group_error = false;
+
+                if (flags & 0x1)
+                        type = "reauth request";
+                if (flags & 0x2)
+                        type = "key update request";
+                if (flags & 0x6) {
+                        pairwise_error = true;
+                        type = "pairwise_error";
+                }
+                if (flags & 0xe) {
+                        group_error = true;
+                        type = "group_error";
+                }
+
+                devinfo(usbdev, "authentication indication: %s (0x%08x)", type,
+                                le32_to_cpu(auth_req->flags));
+
+                if (pairwise_error || group_error) {
+                        union iwreq_data wrqu;
+                        struct iw_michaelmicfailure micfailure;
+
+                        memset(&micfailure, 0, sizeof(micfailure));
+                        if (pairwise_error)
+                                micfailure.flags |= IW_MICFAILURE_PAIRWISE;
+                        if (group_error)
+                                micfailure.flags |= IW_MICFAILURE_GROUP;
+
+                        memcpy(micfailure.src_addr.sa_data, auth_req->bssid,
+                                ETH_ALEN);
+
+                        memset(&wrqu, 0, sizeof(wrqu));
+                        wrqu.data.length = sizeof(micfailure);
+                        wireless_send_event(usbdev->net, IWEVMICHAELMICFAILURE,
+                                                &wrqu, (u8 *)&micfailure);
+                }
+
+                buflen -= le32_to_cpu(auth_req->length);
+                buf += le32_to_cpu(auth_req->length);
+        }
+}
+
+static void rndis_wlan_pmkid_cand_list_indication(struct usbnet *usbdev,
+                                struct ndis_80211_status_indication *indication,
+                                int len)
+{
+        struct ndis_80211_pmkid_cand_list *cand_list;
+        int list_len, expected_len, i;
+
+        if (len < offsetof(struct ndis_80211_status_indication, u) +
+                                sizeof(struct ndis_80211_pmkid_cand_list)) {
+                devinfo(usbdev, "pmkid candidate list indication: "
+                                "too short message (%i)", len);
+                return;
+        }
+
+        list_len = le32_to_cpu(indication->u.cand_list.num_candidates) *
+                        sizeof(struct ndis_80211_pmkid_candidate);
+        expected_len = sizeof(struct ndis_80211_pmkid_cand_list) + list_len +
+                        offsetof(struct ndis_80211_status_indication, u);
+
+        if (len < expected_len) {
+                devinfo(usbdev, "pmkid candidate list indication: "
+                                "list larger than buffer (%i < %i)",
+                                len, expected_len);
+                return;
+        }
+
+        cand_list = &indication->u.cand_list;
+
+        devinfo(usbdev, "pmkid candidate list indication: "
+                        "version %i, candidates %i",
+                        le32_to_cpu(cand_list->version),
+                        le32_to_cpu(cand_list->num_candidates));
+
+        if (le32_to_cpu(cand_list->version) != 1)
+                return;
+
+        for (i = 0; i < le32_to_cpu(cand_list->num_candidates); i++) {
+                struct iw_pmkid_cand pcand;
+                union iwreq_data wrqu;
+                struct ndis_80211_pmkid_candidate *cand =
+                                                &cand_list->candidate_list[i];
+
+                devdbg(usbdev, "cand[%i]: flags: 0x%08x, bssid: %pM",
+                                i, le32_to_cpu(cand->flags), cand->bssid);
+
+                memset(&pcand, 0, sizeof(pcand));
+                if (le32_to_cpu(cand->flags) & 0x01)
+                        pcand.flags |= IW_PMKID_CAND_PREAUTH;
+                pcand.index = i;
+                memcpy(pcand.bssid.sa_data, cand->bssid, ETH_ALEN);
+
+                memset(&wrqu, 0, sizeof(wrqu));
+                wrqu.data.length = sizeof(pcand);
+                wireless_send_event(usbdev->net, IWEVPMKIDCAND, &wrqu,
+                                                                (u8 *)&pcand);
+        }
+}
+
+static void rndis_wlan_media_specific_indication(struct usbnet *usbdev,
+                        struct rndis_indicate *msg, int buflen)
+{
+        struct ndis_80211_status_indication *indication;
+        int len, offset;
+
+        offset = offsetof(struct rndis_indicate, status) +
+                        le32_to_cpu(msg->offset);
+        len = le32_to_cpu(msg->length);
+
+        if (len < 8) {
+                devinfo(usbdev, "media specific indication, "
+                                "ignore too short message (%i < 8)", len);
+                return;
+        }
+
+        if (offset + len > buflen) {
+                devinfo(usbdev, "media specific indication, "
+                                "too large to fit to buffer (%i > %i)",
+                                offset + len, buflen);
+                return;
+        }
+
+        indication = (void *)((u8 *)msg + offset);
+
+        switch (le32_to_cpu(indication->status_type)) {
+        case NDIS_80211_STATUSTYPE_RADIOSTATE:
+                devinfo(usbdev, "radio state indication: %i",
+                        le32_to_cpu(indication->u.radio_status));
+                return;
+
+        case NDIS_80211_STATUSTYPE_MEDIASTREAMMODE:
+                devinfo(usbdev, "media stream mode indication: %i",
+                        le32_to_cpu(indication->u.media_stream_mode));
+                return;
+
+        case NDIS_80211_STATUSTYPE_AUTHENTICATION:
+                rndis_wlan_auth_indication(usbdev, indication, len);
+                return;
+
+        case NDIS_80211_STATUSTYPE_PMKID_CANDIDATELIST:
+                rndis_wlan_pmkid_cand_list_indication(usbdev, indication, len);
+                return;
+
+        default:
+                devinfo(usbdev, "media specific indication: "
+                                "unknown status type 0x%08x",
+                                le32_to_cpu(indication->status_type));
+        }
+}
+
+
 static void rndis_wlan_indication(struct usbnet *usbdev, void *ind, int buflen)
 {
         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
         struct rndis_indicate *msg = ind;
 
-        /* queue work to avoid recursive calls into rndis_command */
         switch (msg->status) {
         case RNDIS_STATUS_MEDIA_CONNECT:
                 devinfo(usbdev, "media connect");
 
+                /* queue work to avoid recursive calls into rndis_command */
                 set_bit(WORK_LINK_UP, &priv->work_pending);
                 queue_work(priv->workqueue, &priv->work);
                 break;
@@ -2228,10 +2454,15 @@ static void rndis_wlan_indication(struct usbnet *usbdev, void *ind, int buflen)
         case RNDIS_STATUS_MEDIA_DISCONNECT:
                 devinfo(usbdev, "media disconnect");
 
+                /* queue work to avoid recursive calls into rndis_command */
                 set_bit(WORK_LINK_DOWN, &priv->work_pending);
                 queue_work(priv->workqueue, &priv->work);
                 break;
 
+        case RNDIS_STATUS_MEDIA_SPECIFIC_INDICATION:
+                rndis_wlan_media_specific_indication(usbdev, msg, buflen);
+                break;
+
         default:
                 devinfo(usbdev, "indication: 0x%08x",
                                 le32_to_cpu(msg->status));