예제 #1
0
/*******************************************************************************
**
**  Function        l2c_ucd_check_pending_info_req
**
** Description      check if any application is waiting for UCD information
**
**  Return          TRUE if any pending UCD info request
**
*******************************************************************************/
BOOLEAN l2c_ucd_check_pending_info_req(tL2C_CCB  *p_ccb)
{
    tL2C_RCB    *p_rcb = &l2cb.rcb_pool[0];
    UINT16      xx;
    BOOLEAN     pending = FALSE;

    if (p_ccb == NULL) {
        L2CAP_TRACE_ERROR ("L2CAP - NULL p_ccb in l2c_ucd_check_pending_info_req");
        return (FALSE);
    }

    for (xx = 0; xx < MAX_L2CAP_CLIENTS; xx++, p_rcb++) {
        if (p_rcb->in_use) {
            /* if application is waiting UCD reception info */
            if (p_rcb->ucd.state & L2C_UCD_STATE_W4_RECEPTION) {
                /* if this information is available */
                if ( p_ccb->p_lcb->info_rx_bits & (1 << L2CAP_EXTENDED_FEATURES_INFO_TYPE) ) {
                    if (!(p_ccb->p_lcb->peer_ext_fea & L2CAP_EXTFEA_UCD_RECEPTION)) {
                        L2CAP_TRACE_WARNING ("L2CAP - UCD is not supported by peer, l2c_ucd_check_pending_info_req");

                        l2c_ucd_delete_sec_pending_q(p_ccb->p_lcb);
                        l2cu_release_ccb (p_ccb);
                    }

                    p_ccb->p_rcb->ucd.cb_info.pL2CA_UCD_Discover_Cb (p_ccb->p_lcb->remote_bd_addr,
                            L2CAP_UCD_INFO_TYPE_RECEPTION,
                            p_ccb->p_lcb->peer_ext_fea & L2CAP_EXTFEA_UCD_RECEPTION);
                } else {
                    pending = TRUE;
                    if (p_ccb->p_lcb->w4_info_rsp == FALSE) {
                        l2cu_send_peer_info_req (p_ccb->p_lcb, L2CAP_EXTENDED_FEATURES_INFO_TYPE);
                    }
                }
            }

            /* if application is waiting for UCD MTU */
            if (p_rcb->ucd.state & L2C_UCD_STATE_W4_MTU) {
                /* if this information is available */
                if ( p_ccb->p_lcb->info_rx_bits & (1 << L2CAP_CONNLESS_MTU_INFO_TYPE)) {
                    p_ccb->p_rcb->ucd.cb_info.pL2CA_UCD_Discover_Cb (p_ccb->p_lcb->remote_bd_addr,
                            L2CAP_UCD_INFO_TYPE_MTU,
                            p_ccb->p_lcb->ucd_mtu);
                } else {
                    pending = TRUE;
                    if (p_ccb->p_lcb->w4_info_rsp == FALSE) {
                        l2cu_send_peer_info_req (p_ccb->p_lcb, L2CAP_CONNLESS_MTU_INFO_TYPE);
                    }
                }
            }
        }
    }
    return (pending);
}
예제 #2
0
/*******************************************************************************
**
** Function         process_l2cap_cmd
**
** Description      This function is called when a packet is received on the
**                  L2CAP signalling CID
**
** Returns          void
**
*******************************************************************************/
static void process_l2cap_cmd (tL2C_LCB *p_lcb, UINT8 *p, UINT16 pkt_len)
{
    UINT8           *p_pkt_end, *p_next_cmd, *p_cfg_end, *p_cfg_start;
    UINT8           cmd_code, cfg_code, cfg_len, id;
    tL2C_CONN_INFO  con_info;
    tL2CAP_CFG_INFO cfg_info;
    UINT16          rej_reason, rej_mtu, lcid, rcid, info_type;
    tL2C_CCB        *p_ccb;
    tL2C_RCB        *p_rcb;
    BOOLEAN         cfg_rej;
    UINT16          cfg_rej_len, cmd_len;
    UINT16          result;
    tL2C_CONN_INFO  ci;

#if (defined BLE_INCLUDED && BLE_INCLUDED == TRUE)
    /* if l2cap command received in CID 1 on top of an LE link, ignore this command */
    if (p_lcb->is_ble_link)
        return;
#endif
    p_next_cmd = p;
    p_pkt_end  = p + pkt_len;

    memset (&cfg_info, 0, sizeof(cfg_info));

    /* An L2CAP packet may contain multiple commands */
    while (TRUE)
    {
        /* Smallest command is 4 bytes */
        if ((p = p_next_cmd) > (p_pkt_end - 4))
            break;

        STREAM_TO_UINT8  (cmd_code, p);
        STREAM_TO_UINT8  (id, p);
        STREAM_TO_UINT16 (cmd_len, p);

        if(cmd_len > GKI_BUF2_SIZE)
        {
             L2CAP_TRACE_WARNING0 ("L2CAP - Invalid MTU Size");
             l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_MTU_EXCEEDED, id, 0, 0);
             return;
        }
        /* Check command length does not exceed packet length */
        if ((p_next_cmd = p + cmd_len) > p_pkt_end)
        {
            L2CAP_TRACE_WARNING3 ("Command len bad  pkt_len: %d  cmd_len: %d  code: %d",
                                  pkt_len, cmd_len, cmd_code);
            break;
        }

        switch (cmd_code)
        {
        case L2CAP_CMD_REJECT:
            STREAM_TO_UINT16 (rej_reason, p);
            if (rej_reason == L2CAP_CMD_REJ_MTU_EXCEEDED)
            {
                STREAM_TO_UINT16 (rej_mtu, p);
                /* What to do with the MTU reject ? We have negotiated an MTU. For now */
                /* we will ignore it and let a higher protocol timeout take care of it */

                L2CAP_TRACE_WARNING2 ("L2CAP - MTU rej Handle: %d MTU: %d", p_lcb->handle, rej_mtu);
            }
            if (rej_reason == L2CAP_CMD_REJ_INVALID_CID)
            {
                STREAM_TO_UINT16 (rcid, p);
                STREAM_TO_UINT16 (lcid, p);

                L2CAP_TRACE_WARNING2 ("L2CAP - rej with CID invalid, LCID: 0x%04x RCID: 0x%04x", lcid, rcid);

                /* Remote CID invalid. Treat as a disconnect */
                if (((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL)
                 && (p_ccb->remote_cid == rcid))
                {
                    /* Fake link disconnect - no reply is generated */
                    l2c_csm_execute (p_ccb, L2CEVT_LP_DISCONNECT_IND, NULL);
                }
            }

            /* SonyEricsson Info request Bug workaround (Continue connection) */
            else if (rej_reason == L2CAP_CMD_REJ_NOT_UNDERSTOOD && p_lcb->w4_info_rsp)
            {
                btu_stop_timer (&p_lcb->info_timer_entry);

                p_lcb->w4_info_rsp = FALSE;
                ci.status = HCI_SUCCESS;
                memcpy (ci.bd_addr, p_lcb->remote_bd_addr, sizeof(BD_ADDR));

                /* For all channels, send the event through their FSMs */
                for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb; p_ccb = p_ccb->p_next_ccb)
                {
                    l2c_csm_execute (p_ccb, L2CEVT_L2CAP_INFO_RSP, &ci);
                }
            }
            break;

        case L2CAP_CMD_CONN_REQ:
            STREAM_TO_UINT16 (con_info.psm, p);
            STREAM_TO_UINT16 (rcid, p);
            if ((p_rcb = l2cu_find_rcb_by_psm (con_info.psm)) == NULL)
            {
                L2CAP_TRACE_WARNING1 ("L2CAP - rcvd conn req for unknown PSM: %d", con_info.psm);
                l2cu_reject_connection (p_lcb, rcid, id, L2CAP_CONN_NO_PSM);
                break;
            }
            else
            {
                if (!p_rcb->api.pL2CA_ConnectInd_Cb)
                {
                    L2CAP_TRACE_WARNING1 ("L2CAP - rcvd conn req for outgoing-only connection PSM: %d", con_info.psm);
                    l2cu_reject_connection (p_lcb, rcid, id, L2CAP_CONN_NO_PSM);
                    break;
                }
            }
            if ((p_ccb = l2cu_allocate_ccb (p_lcb, 0)) == NULL)
            {
                L2CAP_TRACE_ERROR0 ("L2CAP - unable to allocate CCB");
                l2cu_reject_connection (p_lcb, rcid, id, L2CAP_CONN_NO_RESOURCES);
                break;
            }
            p_ccb->remote_id = id;
            p_ccb->p_rcb = p_rcb;
            p_ccb->remote_cid = rcid;

            l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_REQ, &con_info);
            break;

        case L2CAP_CMD_CONN_RSP:
            STREAM_TO_UINT16 (con_info.remote_cid, p);
            STREAM_TO_UINT16 (lcid, p);
            STREAM_TO_UINT16 (con_info.l2cap_result, p);
            STREAM_TO_UINT16 (con_info.l2cap_status, p);

            if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) == NULL)
            {
                L2CAP_TRACE_WARNING2 ("L2CAP - no CCB for conn rsp, LCID: %d RCID: %d",
                                      lcid, con_info.remote_cid);
                break;
            }
            if (p_ccb->local_id != id)
            {
                L2CAP_TRACE_WARNING2 ("L2CAP - con rsp - bad ID. Exp: %d Got: %d",
                                      p_ccb->local_id, id);
                break;
            }

            if (con_info.l2cap_result == L2CAP_CONN_OK)
                l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP, &con_info);
            else if (con_info.l2cap_result == L2CAP_CONN_PENDING)
                l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_PND, &con_info);
            else
                l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info);

            break;

        case L2CAP_CMD_CONFIG_REQ:
            p_cfg_end = p + cmd_len;
            cfg_rej = FALSE;
            cfg_rej_len = 0;

            STREAM_TO_UINT16 (lcid, p);
            STREAM_TO_UINT16 (cfg_info.flags, p);

            p_cfg_start = p;

            cfg_info.flush_to_present = cfg_info.mtu_present = cfg_info.qos_present =
            cfg_info.fcr_present = cfg_info.fcs_present = FALSE;

            while (p < p_cfg_end)
            {
                STREAM_TO_UINT8 (cfg_code, p);
                STREAM_TO_UINT8 (cfg_len, p);

                switch (cfg_code & 0x7F)
                {
                case L2CAP_CFG_TYPE_MTU:
                    cfg_info.mtu_present = TRUE;
                    STREAM_TO_UINT16 (cfg_info.mtu, p);
                    break;

                case L2CAP_CFG_TYPE_FLUSH_TOUT:
                    cfg_info.flush_to_present = TRUE;
                    STREAM_TO_UINT16 (cfg_info.flush_to, p);
                    break;

                case L2CAP_CFG_TYPE_QOS:
                    cfg_info.qos_present = TRUE;
                    STREAM_TO_UINT8  (cfg_info.qos.qos_flags, p);
                    STREAM_TO_UINT8  (cfg_info.qos.service_type, p);
                    STREAM_TO_UINT32 (cfg_info.qos.token_rate, p);
                    STREAM_TO_UINT32 (cfg_info.qos.token_bucket_size, p);
                    STREAM_TO_UINT32 (cfg_info.qos.peak_bandwidth, p);
                    STREAM_TO_UINT32 (cfg_info.qos.latency, p);
                    STREAM_TO_UINT32 (cfg_info.qos.delay_variation, p);
                    break;

                case L2CAP_CFG_TYPE_FCR:
                    cfg_info.fcr_present = TRUE;
                    STREAM_TO_UINT8 (cfg_info.fcr.mode, p);
                    STREAM_TO_UINT8 (cfg_info.fcr.tx_win_sz, p);
                    STREAM_TO_UINT8 (cfg_info.fcr.max_transmit, p);
                    STREAM_TO_UINT16 (cfg_info.fcr.rtrans_tout, p);
                    STREAM_TO_UINT16 (cfg_info.fcr.mon_tout, p);
                    STREAM_TO_UINT16 (cfg_info.fcr.mps, p);
                    break;

                case L2CAP_CFG_TYPE_FCS:
                    cfg_info.fcs_present = TRUE;
                    STREAM_TO_UINT8 (cfg_info.fcs, p);
                    break;

                case L2CAP_CFG_TYPE_EXT_FLOW:
                    cfg_info.ext_flow_spec_present = TRUE;
                    STREAM_TO_UINT8  (cfg_info.ext_flow_spec.id, p);
                    STREAM_TO_UINT8  (cfg_info.ext_flow_spec.stype, p);
                    STREAM_TO_UINT16 (cfg_info.ext_flow_spec.max_sdu_size, p);
                    STREAM_TO_UINT32 (cfg_info.ext_flow_spec.sdu_inter_time, p);
                    STREAM_TO_UINT32 (cfg_info.ext_flow_spec.access_latency, p);
                    STREAM_TO_UINT32 (cfg_info.ext_flow_spec.flush_timeout, p);
                    break;

                default:
                    /* sanity check option length */
                    if ((cfg_len + L2CAP_CFG_OPTION_OVERHEAD) <= cmd_len)
                    {
                        p += cfg_len;
                        if ((cfg_code & 0x80) == 0)
                        {
                            cfg_rej_len += cfg_len + L2CAP_CFG_OPTION_OVERHEAD;
                            cfg_rej = TRUE;
                        }
                    }
                    /* bad length; force loop exit */
                    else
                    {
                        p = p_cfg_end;
                        cfg_rej = TRUE;
                    }
                    break;
                }
            }

            if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL)
            {
                p_ccb->remote_id = id;
                if (cfg_rej)
                {
                    l2cu_send_peer_config_rej (p_ccb, p_cfg_start, (UINT16) (cmd_len - L2CAP_CONFIG_REQ_LEN), cfg_rej_len);
                }
                else
                {
                    l2c_csm_execute (p_ccb, L2CEVT_L2CAP_CONFIG_REQ, &cfg_info);
                }
            }
            else
            {
                /* updated spec says send command reject on invalid cid */
                l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_INVALID_CID, id, 0, 0);
            }
            break;

        case L2CAP_CMD_CONFIG_RSP:
            p_cfg_end = p + cmd_len;
            STREAM_TO_UINT16 (lcid, p);
            STREAM_TO_UINT16 (cfg_info.flags, p);
            STREAM_TO_UINT16 (cfg_info.result, p);

            cfg_info.flush_to_present = cfg_info.mtu_present = cfg_info.qos_present =
                cfg_info.fcr_present = cfg_info.fcs_present = FALSE;

            while (p < p_cfg_end)
            {
                STREAM_TO_UINT8 (cfg_code, p);
                STREAM_TO_UINT8 (cfg_len, p);

                switch (cfg_code & 0x7F)
                {
                case L2CAP_CFG_TYPE_MTU:
                    cfg_info.mtu_present = TRUE;
                    STREAM_TO_UINT16 (cfg_info.mtu, p);
                    break;

                case L2CAP_CFG_TYPE_FLUSH_TOUT:
                    cfg_info.flush_to_present = TRUE;
                    STREAM_TO_UINT16 (cfg_info.flush_to, p);
                    break;

                case L2CAP_CFG_TYPE_QOS:
                    cfg_info.qos_present = TRUE;
                    STREAM_TO_UINT8  (cfg_info.qos.qos_flags, p);
                    STREAM_TO_UINT8  (cfg_info.qos.service_type, p);
                    STREAM_TO_UINT32 (cfg_info.qos.token_rate, p);
                    STREAM_TO_UINT32 (cfg_info.qos.token_bucket_size, p);
                    STREAM_TO_UINT32 (cfg_info.qos.peak_bandwidth, p);
                    STREAM_TO_UINT32 (cfg_info.qos.latency, p);
                    STREAM_TO_UINT32 (cfg_info.qos.delay_variation, p);
                    break;

                case L2CAP_CFG_TYPE_FCR:
                    cfg_info.fcr_present = TRUE;
                    STREAM_TO_UINT8 (cfg_info.fcr.mode, p);
                    STREAM_TO_UINT8 (cfg_info.fcr.tx_win_sz, p);
                    STREAM_TO_UINT8 (cfg_info.fcr.max_transmit, p);
                    STREAM_TO_UINT16 (cfg_info.fcr.rtrans_tout, p);
                    STREAM_TO_UINT16 (cfg_info.fcr.mon_tout, p);
                    STREAM_TO_UINT16 (cfg_info.fcr.mps, p);
                    break;

                case L2CAP_CFG_TYPE_FCS:
                    cfg_info.fcs_present = TRUE;
                    STREAM_TO_UINT8 (cfg_info.fcs, p);
                    break;

                case L2CAP_CFG_TYPE_EXT_FLOW:
                    cfg_info.ext_flow_spec_present = TRUE;
                    STREAM_TO_UINT8  (cfg_info.ext_flow_spec.id, p);
                    STREAM_TO_UINT8  (cfg_info.ext_flow_spec.stype, p);
                    STREAM_TO_UINT16 (cfg_info.ext_flow_spec.max_sdu_size, p);
                    STREAM_TO_UINT32 (cfg_info.ext_flow_spec.sdu_inter_time, p);
                    STREAM_TO_UINT32 (cfg_info.ext_flow_spec.access_latency, p);
                    STREAM_TO_UINT32 (cfg_info.ext_flow_spec.flush_timeout, p);
                    break;
                }
            }

            if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL)
            {
                if (p_ccb->local_id != id)
                {
                    L2CAP_TRACE_WARNING2 ("L2CAP - cfg rsp - bad ID. Exp: %d Got: %d",
                                          p_ccb->local_id, id);
                    break;
                }
                if ( (cfg_info.result == L2CAP_CFG_OK) || (cfg_info.result == L2CAP_CFG_PENDING) )
                    l2c_csm_execute (p_ccb, L2CEVT_L2CAP_CONFIG_RSP, &cfg_info);
                else
                    l2c_csm_execute (p_ccb, L2CEVT_L2CAP_CONFIG_RSP_NEG, &cfg_info);
            }
            else
            {
                L2CAP_TRACE_WARNING1 ("L2CAP - rcvd cfg rsp for unknown CID: 0x%04x", lcid);
            }
            break;


        case L2CAP_CMD_DISC_REQ:
            STREAM_TO_UINT16 (lcid, p);
            STREAM_TO_UINT16 (rcid, p);

            if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL)
            {
                if (p_ccb->remote_cid == rcid)
                {
                    p_ccb->remote_id = id;
                    l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DISCONNECT_REQ, &con_info);
                }
            }
            else
                l2cu_send_peer_disc_rsp (p_lcb, id, lcid, rcid);

            break;

        case L2CAP_CMD_DISC_RSP:
            STREAM_TO_UINT16 (rcid, p);
            STREAM_TO_UINT16 (lcid, p);

            if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL)
            {
                if ((p_ccb->remote_cid == rcid) && (p_ccb->local_id == id))
                {
                    l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DISCONNECT_RSP, &con_info);
                }
            }
            break;

        case L2CAP_CMD_ECHO_REQ:
            l2cu_send_peer_echo_rsp (p_lcb, id, p, cmd_len);
            break;

        case L2CAP_CMD_ECHO_RSP:
            if (p_lcb->p_echo_rsp_cb)
            {
                tL2CA_ECHO_RSP_CB *p_cb = p_lcb->p_echo_rsp_cb;

                /* Zero out the callback in case app immediately calls us again */
                p_lcb->p_echo_rsp_cb = NULL;

                (*p_cb) (L2CAP_PING_RESULT_OK);
            }
            break;

        case L2CAP_CMD_INFO_REQ:
            STREAM_TO_UINT16 (info_type, p);
            l2cu_send_peer_info_rsp (p_lcb, id, info_type);
            break;

        case L2CAP_CMD_INFO_RSP:
            /* Stop the link connect timer if sent before L2CAP connection is up */
            if (p_lcb->w4_info_rsp)
            {
                btu_stop_timer (&p_lcb->info_timer_entry);
                p_lcb->w4_info_rsp = FALSE;
            }

            STREAM_TO_UINT16 (info_type, p);
            STREAM_TO_UINT16 (result, p);

            p_lcb->info_rx_bits |= (1 << info_type);

            if ( (info_type == L2CAP_EXTENDED_FEATURES_INFO_TYPE)
              && (result == L2CAP_INFO_RESP_RESULT_SUCCESS) )
            {
                STREAM_TO_UINT32( p_lcb->peer_ext_fea, p );

#if (L2CAP_NUM_FIXED_CHNLS > 0)
                if (p_lcb->peer_ext_fea & L2CAP_EXTFEA_FIXED_CHNLS)
                {
                    l2cu_send_peer_info_req (p_lcb, L2CAP_FIXED_CHANNELS_INFO_TYPE);
                    break;
                }
                else
                {
                    l2cu_process_fixed_chnl_resp (p_lcb);
                }
#endif
            }


#if (L2CAP_NUM_FIXED_CHNLS > 0)
            if (info_type == L2CAP_FIXED_CHANNELS_INFO_TYPE)
            {
                if (result == L2CAP_INFO_RESP_RESULT_SUCCESS)
                {
                    memcpy (p_lcb->peer_chnl_mask, p, L2CAP_FIXED_CHNL_ARRAY_SIZE);
                }

                l2cu_process_fixed_chnl_resp (p_lcb);
            }
#endif
#if (L2CAP_UCD_INCLUDED == TRUE)
            else if (info_type == L2CAP_CONNLESS_MTU_INFO_TYPE)
            {
                if (result == L2CAP_INFO_RESP_RESULT_SUCCESS)
                {
                    STREAM_TO_UINT16 (p_lcb->ucd_mtu, p);
                }
            }
#endif

            ci.status = HCI_SUCCESS;
            memcpy (ci.bd_addr, p_lcb->remote_bd_addr, sizeof(BD_ADDR));
            for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb; p_ccb = p_ccb->p_next_ccb)
            {
                l2c_csm_execute (p_ccb, L2CEVT_L2CAP_INFO_RSP, &ci);
            }
            break;

        default:
            L2CAP_TRACE_WARNING1 ("L2CAP - bad cmd code: %d", cmd_code);
            l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
            return;
        }
    }
}