rndis.c

底层驱动开发

	case OID_GEN_DIRECTED_BYTES_RCV:
		DEBUG("%s: OID_GEN_DIRECTED_BYTES_RCV\n", __FUNCTION__);
		*outbuf = __constant_cpu_to_le32 (0);
		retval = 0;
		break;
		
	case OID_GEN_DIRECTED_FRAMES_RCV:
		DEBUG("%s: OID_GEN_DIRECTED_FRAMES_RCV\n", __FUNCTION__);
		*outbuf = __constant_cpu_to_le32 (0);
		retval = 0;
		break;
		
	case OID_GEN_MULTICAST_BYTES_RCV:
		DEBUG("%s: OID_GEN_MULTICAST_BYTES_RCV\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].stats) {
			*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
					.stats->multicast * 1111);
			retval = 0;
		}
		break;
		
	case OID_GEN_MULTICAST_FRAMES_RCV:
		DEBUG("%s: OID_GEN_MULTICAST_FRAMES_RCV\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].stats) {
			*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
					.stats->multicast);
			retval = 0;
		}
		break;
		
	case OID_GEN_BROADCAST_BYTES_RCV:
		DEBUG("%s: OID_GEN_BROADCAST_BYTES_RCV\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].stats) {
			*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
					.stats->rx_packets/42*255);
			retval = 0;
		}
		break;
		
	case OID_GEN_BROADCAST_FRAMES_RCV:
		DEBUG("%s: OID_GEN_BROADCAST_FRAMES_RCV\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].stats) {
			*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
					.stats->rx_packets/42);
			retval = 0;
		}
		break;
		
	case OID_GEN_RCV_CRC_ERROR:
		DEBUG("%s: OID_GEN_RCV_CRC_ERROR\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].stats) {
			*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
					.stats->rx_crc_errors);
			retval = 0;
		}
		break;
		
	case OID_GEN_TRANSMIT_QUEUE_LENGTH:
		DEBUG("%s: OID_GEN_TRANSMIT_QUEUE_LENGTH\n", __FUNCTION__);
		*outbuf = __constant_cpu_to_le32 (0);
		retval = 0;
		break;
#endif	/* RNDIS_OPTIONAL_STATS */

	/* ieee802.3 OIDs (table 4-3) */

	/* mandatory */
	case OID_802_3_PERMANENT_ADDRESS:
		DEBUG("%s: OID_802_3_PERMANENT_ADDRESS\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].dev) {
			length = ETH_ALEN;
			memcpy (outbuf,
				rndis_per_dev_params [configNr].host_mac,
				length);
			retval = 0;
		}
		break;
		
	/* mandatory */
	case OID_802_3_CURRENT_ADDRESS:
		DEBUG("%s: OID_802_3_CURRENT_ADDRESS\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].dev) {
			length = ETH_ALEN;
			memcpy (outbuf,
				rndis_per_dev_params [configNr].host_mac,
				length);
			retval = 0;
		}
		break;
		
	/* mandatory */
	case OID_802_3_MULTICAST_LIST:
		DEBUG("%s: OID_802_3_MULTICAST_LIST\n", __FUNCTION__);
		/* Multicast base address only */
		*outbuf = __constant_cpu_to_le32 (0xE0000000);
		retval = 0;
		break;
		
	/* mandatory */
	case OID_802_3_MAXIMUM_LIST_SIZE:
		DEBUG("%s: OID_802_3_MAXIMUM_LIST_SIZE\n", __FUNCTION__);
		/* Multicast base address only */
		*outbuf = __constant_cpu_to_le32 (1);
		retval = 0;
		break;
		
	case OID_802_3_MAC_OPTIONS:
		DEBUG("%s: OID_802_3_MAC_OPTIONS\n", __FUNCTION__);
		break;

	/* ieee802.3 statistics OIDs (table 4-4) */

	/* mandatory */
	case OID_802_3_RCV_ERROR_ALIGNMENT:
		DEBUG("%s: OID_802_3_RCV_ERROR_ALIGNMENT\n", __FUNCTION__);
		if (rndis_per_dev_params [configNr].stats) {
			*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
					.stats->rx_frame_errors);
			retval = 0;
		}
		break;
		
	/* mandatory */
	case OID_802_3_XMIT_ONE_COLLISION:
		DEBUG("%s: OID_802_3_XMIT_ONE_COLLISION\n", __FUNCTION__);
		*outbuf = __constant_cpu_to_le32 (0);
		retval = 0;
		break;
		
	/* mandatory */
	case OID_802_3_XMIT_MORE_COLLISIONS:
		DEBUG("%s: OID_802_3_XMIT_MORE_COLLISIONS\n", __FUNCTION__);
		*outbuf = __constant_cpu_to_le32 (0);
		retval = 0;
		break;
		
#ifdef	RNDIS_OPTIONAL_STATS
	case OID_802_3_XMIT_DEFERRED:
		DEBUG("%s: OID_802_3_XMIT_DEFERRED\n", __FUNCTION__);
		/* TODO */
		break;
		
	case OID_802_3_XMIT_MAX_COLLISIONS:
		DEBUG("%s: OID_802_3_XMIT_MAX_COLLISIONS\n", __FUNCTION__);
		/* TODO */
		break;
		
	case OID_802_3_RCV_OVERRUN:
		DEBUG("%s: OID_802_3_RCV_OVERRUN\n", __FUNCTION__);
		/* TODO */
		break;
		
	case OID_802_3_XMIT_UNDERRUN:
		DEBUG("%s: OID_802_3_XMIT_UNDERRUN\n", __FUNCTION__);
		/* TODO */
		break;
		
	case OID_802_3_XMIT_HEARTBEAT_FAILURE:
		DEBUG("%s: OID_802_3_XMIT_HEARTBEAT_FAILURE\n", __FUNCTION__);
		/* TODO */
		break;
		
	case OID_802_3_XMIT_TIMES_CRS_LOST:
		DEBUG("%s: OID_802_3_XMIT_TIMES_CRS_LOST\n", __FUNCTION__);
		/* TODO */
		break;
		
	case OID_802_3_XMIT_LATE_COLLISIONS:
		DEBUG("%s: OID_802_3_XMIT_LATE_COLLISIONS\n", __FUNCTION__);
		/* TODO */
		break;		
#endif	/* RNDIS_OPTIONAL_STATS */

#ifdef	RNDIS_PM
	/* power management OIDs (table 4-5) */
	case OID_PNP_CAPABILITIES:
		DEBUG("%s: OID_PNP_CAPABILITIES\n", __FUNCTION__);

		/* for now, no wakeup capabilities */
		length = sizeof (struct NDIS_PNP_CAPABILITIES);
		memset(outbuf, 0, length);
		retval = 0;
		break;
	case OID_PNP_QUERY_POWER:
		DEBUG("%s: OID_PNP_QUERY_POWER D%d\n", __FUNCTION__,
				le32_to_cpup((__le32 *) buf) - 1);
		/* only suspend is a real power state, and
		 * it can't be entered by OID_PNP_SET_POWER...
		 */
		length = 0;
		retval = 0;
		break;
#endif

	default:
		printk (KERN_WARNING "%s: query unknown OID 0x%08X\n", 
			 __FUNCTION__, OID);
	}
	if (retval < 0)
		length = 0;
	
	resp->InformationBufferLength = cpu_to_le32 (length);
	r->length = length + sizeof *resp;
	resp->MessageLength = cpu_to_le32 (r->length);
	return retval;
}

static int gen_ndis_set_resp (u8 configNr, u32 OID, u8 *buf, u32 buf_len, 
			      rndis_resp_t *r)
{
	rndis_set_cmplt_type		*resp;
	int 				i, retval = -ENOTSUPP;
	struct rndis_params		*params;

	if (!r)
		return -ENOMEM;
	resp = (rndis_set_cmplt_type *) r->buf;
	if (!resp)
		return -ENOMEM;

	if (buf_len && rndis_debug > 1) {
		DEBUG("set OID %08x value, len %d:\n", OID, buf_len);
		for (i = 0; i < buf_len; i += 16) {
			DEBUG ("%03d: %08x %08x %08x %08x\n", i,
				le32_to_cpup((__le32 *)&buf[i]),
				le32_to_cpup((__le32 *)&buf[i + 4]),
				le32_to_cpup((__le32 *)&buf[i + 8]),
				le32_to_cpup((__le32 *)&buf[i + 12]));
		}
	}

	params = &rndis_per_dev_params [configNr];
	switch (OID) {
	case OID_GEN_CURRENT_PACKET_FILTER:

		/* these NDIS_PACKET_TYPE_* bitflags are shared with
		 * cdc_filter; it's not RNDIS-specific
		 * NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in:
		 *	PROMISCUOUS, DIRECTED,
		 *	MULTICAST, ALL_MULTICAST, BROADCAST
		 */
		*params->filter = (u16) le32_to_cpup((__le32 *)buf);
		DEBUG("%s: OID_GEN_CURRENT_PACKET_FILTER %08x\n",
			__FUNCTION__, *params->filter);

		/* this call has a significant side effect:  it's
		 * what makes the packet flow start and stop, like
		 * activating the CDC Ethernet altsetting.
		 */
#ifdef	RNDIS_PM
update_linkstate:
#endif
		retval = 0;
		if (*params->filter) {
			params->state = RNDIS_DATA_INITIALIZED;
			netif_carrier_on(params->dev);
			if (netif_running(params->dev))
				netif_wake_queue (params->dev);
		} else {
			params->state = RNDIS_INITIALIZED;
			netif_carrier_off (params->dev);
			netif_stop_queue (params->dev);
		}
		break;
		
	case OID_802_3_MULTICAST_LIST:
		/* I think we can ignore this */		
		DEBUG("%s: OID_802_3_MULTICAST_LIST\n", __FUNCTION__);
		retval = 0;
		break;
#if 0
	case OID_GEN_RNDIS_CONFIG_PARAMETER:
		{
		struct rndis_config_parameter	*param;
		param = (struct rndis_config_parameter *) buf;
		DEBUG("%s: OID_GEN_RNDIS_CONFIG_PARAMETER '%*s'\n",
			__FUNCTION__,
			min(cpu_to_le32(param->ParameterNameLength),80),
			buf + param->ParameterNameOffset);
		retval = 0;
		}
		break;
#endif

#ifdef	RNDIS_PM
	case OID_PNP_SET_POWER:
		/* The only real power state is USB suspend, and RNDIS requests
		 * can't enter it; this one isn't really about power.  After
		 * resuming, Windows forces a reset, and then SET_POWER D0.
		 * FIXME ... then things go batty; Windows wedges itself.
		 */
		i = le32_to_cpup((__force __le32 *)buf);
		DEBUG("%s: OID_PNP_SET_POWER D%d\n", __FUNCTION__, i - 1);
		switch (i) {
		case NdisDeviceStateD0:
			*params->filter = params->saved_filter;
			goto update_linkstate;
		case NdisDeviceStateD3:
		case NdisDeviceStateD2:
		case NdisDeviceStateD1:
			params->saved_filter = *params->filter;
			retval = 0;
			break;
		}
		break;

#ifdef	RNDIS_WAKEUP
	// no wakeup support advertised, so wakeup OIDs always fail:
	//  - OID_PNP_ENABLE_WAKE_UP
	//  - OID_PNP_{ADD,REMOVE}_WAKE_UP_PATTERN
#endif

#endif	/* RNDIS_PM */

	default:
		printk (KERN_WARNING "%s: set unknown OID 0x%08X, size %d\n", 
			 __FUNCTION__, OID, buf_len);
	}
	
	return retval;
}

/* 
 * Response Functions 
 */

static int rndis_init_response (int configNr, rndis_init_msg_type *buf)
{
	rndis_init_cmplt_type	*resp; 
	rndis_resp_t            *r;
	
	if (!rndis_per_dev_params [configNr].dev) return -ENOTSUPP;
	
	r = rndis_add_response (configNr, sizeof (rndis_init_cmplt_type));
	if (!r)
		return -ENOMEM;
	resp = (rndis_init_cmplt_type *) r->buf;
	
	resp->MessageType = __constant_cpu_to_le32 (
			REMOTE_NDIS_INITIALIZE_CMPLT);
	resp->MessageLength = __constant_cpu_to_le32 (52);
	resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
	resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
	resp->MajorVersion = __constant_cpu_to_le32 (RNDIS_MAJOR_VERSION);
	resp->MinorVersion = __constant_cpu_to_le32 (RNDIS_MINOR_VERSION);
	resp->DeviceFlags = __constant_cpu_to_le32 (RNDIS_DF_CONNECTIONLESS);
	resp->Medium = __constant_cpu_to_le32 (RNDIS_MEDIUM_802_3);
	resp->MaxPacketsPerTransfer = __constant_cpu_to_le32 (1);
	resp->MaxTransferSize = cpu_to_le32 (
		  rndis_per_dev_params [configNr].dev->mtu
		+ sizeof (struct ethhdr)
		+ sizeof (struct rndis_packet_msg_type)
		+ 22);
	resp->PacketAlignmentFactor = __constant_cpu_to_le32 (0);
	resp->AFListOffset = __constant_cpu_to_le32 (0);
	resp->AFListSize = __constant_cpu_to_le32 (0);
	
	if (rndis_per_dev_params [configNr].ack)
	    rndis_per_dev_params [configNr].ack (
	    		rndis_per_dev_params [configNr].dev);
	
	return 0;
}

static int rndis_query_response (int configNr, rndis_query_msg_type *buf)
{
	rndis_query_cmplt_type *resp;
	rndis_resp_t            *r;
	
	// DEBUG("%s: OID = %08X\n", __FUNCTION__, cpu_to_le32(buf->OID));
	if (!rndis_per_dev_params [configNr].dev) return -ENOTSUPP;
	
	/* 
	 * we need more memory: 
	 * oid_supported_list is the largest answer 
	 */
	r = rndis_add_response (configNr, sizeof (oid_supported_list));
	if (!r)
		return -ENOMEM;
	resp = (rndis_query_cmplt_type *) r->buf;
	
	resp->MessageType = __constant_cpu_to_le32 (REMOTE_NDIS_QUERY_CMPLT);
	resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
  	
	if (gen_ndis_query_resp (configNr, le32_to_cpu (buf->OID),
			le32_to_cpu(buf->InformationBufferOffset)
					+ 8 + (u8 *) buf,
			le32_to_cpu(buf->InformationBufferLength),
			r)) {
		/* OID not supported */
		resp->Status = __constant_cpu_to_le32 (
				RNDIS_STATUS_NOT_SUPPORTED);
		resp->MessageLength = __constant_cpu_to_le32 (sizeof *resp);
		resp->InformationBufferLength = __constant_cpu_to_le32 (0);
		resp->InformationBufferOffset = __constant_cpu_to_le32 (0);
	} else
		resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
	
	if (rndis_per_dev_params [configNr].ack)
	    rndis_per_dev_params [configNr].ack (
	    		rndis_per_dev_params [configNr].dev);
	return 0;
}

static int rndis_set_response (int configNr, rndis_set_msg_type *buf)
{
	u32			BufLength, BufOffset;
	rndis_set_cmplt_type	*resp;
	rndis_resp_t		*r;
	
	r = rndis_add_response (configNr, sizeof (rndis_set_cmplt_type));
	if (!r)
		return -ENOMEM;
	resp = (rndis_set_cmplt_type *) r->buf;

	BufLength = le32_to_cpu (buf->InformationBufferLength);
	BufOffset = le32_to_cpu (buf->InformationBufferOffset);

#ifdef	VERBOSE
	DEBUG("%s: Length: %d\n", __FUNCTION__, BufLength);
	DEBUG("%s: Offset: %d\n", __FUNCTION__, BufOffset);
	DEBUG("%s: InfoBuffer: ", __FUNCTION__);
	
	for (i = 0; i < BufLength; i++) {
		DEBUG ("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
	}
	
	DEBUG ("\n");
#endif
	
	resp->MessageType = __constant_cpu_to_le32 (REMOTE_NDIS_SET_CMPLT);
	resp->MessageLength = __constant_cpu_to_le32 (16);
	resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
	if (gen_ndis_set_resp (configNr, le32_to_cpu (buf->OID), 
			       ((u8 *) buf) + 8 + BufOffset, BufLength, r))
	    resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_NOT_SUPPORTED);
	else resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
	
	if (rndis_per_dev_params [configNr].ack)
	    rndis_per_dev_params [configNr].ack (
	    		rndis_per_dev_params [configNr].dev);
	
	return 0;
}

static int rndis_reset_response (int configNr, rndis_reset_msg_type *buf)
{
	rndis_reset_cmplt_type	*resp;
	rndis_resp_t		*r;
	
	r = rndis_add_response (configNr, sizeof (rndis_reset_cmplt_type));
	if (!r)
		return -ENOMEM;
	resp = (rndis_reset_cmplt_type *) r->buf;
	
	resp->MessageType = __constant_cpu_to_le32 (REMOTE_NDIS_RESET_CMPLT);
	resp->MessageLength = __constant_cpu_to_le32 (16);
	resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
	/* resent information */
	resp->AddressingReset = __constant_cpu_to_le32 (1);
	
	if (rndis_per_dev_params [configNr].ack)
	    rndis_per_dev_params [configNr].ack (
	    		rndis_per_dev_params [configNr].dev);

	return 0;
}

static int rndis_keepalive_response (int configNr,
				     rndis_keepalive_msg_type *buf)
{
	rndis_keepalive_cmplt_type	*resp;
	rndis_resp_t			*r;

	/* host "should" check only in RNDIS_DATA_INITIALIZED state */

	r = rndis_add_response (configNr, sizeof (rndis_keepalive_cmplt_type));
	if (!r)
		return -ENOMEM;
	resp = (rndis_keepalive_cmplt_type *) r->buf;
		
	resp->MessageType = __constant_cpu_to_le32 (
			REMOTE_NDIS_KEEPALIVE_CMPLT);
	resp->MessageLength = __constant_cpu_to_le32 (16);