2005-08-31 16:54:36 +00:00
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/*
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* Host Side support for RNDIS Networking Links
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* Copyright (C) 2005 by David Brownell
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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// #define DEBUG // error path messages, extra info
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// #define VERBOSE // more; success messages
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/workqueue.h>
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#include <linux/mii.h>
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#include <linux/usb.h>
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#include <linux/usb_cdc.h>
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#include "usbnet.h"
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/*
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* RNDIS is NDIS remoted over USB. It's a MSFT variant of CDC ACM ... of
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* course ACM was intended for modems, not Ethernet links! USB's standard
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* for Ethernet links is "CDC Ethernet", which is significantly simpler.
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2006-04-02 18:19:08 +00:00
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*
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* NOTE that Microsoft's "RNDIS 1.0" specification is incomplete. Issues
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* include:
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* - Power management in particular relies on information that's scattered
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* through other documentation, and which is incomplete or incorrect even
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* there.
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* - There are various undocumented protocol requirements, such as the
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* need to send unused garbage in control-OUT messages.
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* - In some cases, MS-Windows will emit undocumented requests; this
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* matters more to peripheral implementations than host ones.
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*
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* For these reasons and others, ** USE OF RNDIS IS STRONGLY DISCOURAGED ** in
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* favor of such non-proprietary alternatives as CDC Ethernet or the newer (and
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* currently rare) "Ethernet Emulation Model" (EEM).
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2005-08-31 16:54:36 +00:00
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*/
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/*
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* CONTROL uses CDC "encapsulated commands" with funky notifications.
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* - control-out: SEND_ENCAPSULATED
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* - interrupt-in: RESPONSE_AVAILABLE
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* - control-in: GET_ENCAPSULATED
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*
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* We'll try to ignore the RESPONSE_AVAILABLE notifications.
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*/
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struct rndis_msg_hdr {
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__le32 msg_type; /* RNDIS_MSG_* */
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__le32 msg_len;
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// followed by data that varies between messages
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__le32 request_id;
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__le32 status;
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// ... and more
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} __attribute__ ((packed));
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/* RNDIS defines this (absurdly huge) control timeout */
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#define RNDIS_CONTROL_TIMEOUT_MS (10 * 1000)
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#define ccpu2 __constant_cpu_to_le32
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#define RNDIS_MSG_COMPLETION ccpu2(0x80000000)
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/* codes for "msg_type" field of rndis messages;
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* only the data channel uses packet messages (maybe batched);
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* everything else goes on the control channel.
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*/
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#define RNDIS_MSG_PACKET ccpu2(0x00000001) /* 1-N packets */
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#define RNDIS_MSG_INIT ccpu2(0x00000002)
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2006-04-02 18:19:08 +00:00
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#define RNDIS_MSG_INIT_C (RNDIS_MSG_INIT|RNDIS_MSG_COMPLETION)
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2005-08-31 16:54:36 +00:00
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#define RNDIS_MSG_HALT ccpu2(0x00000003)
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#define RNDIS_MSG_QUERY ccpu2(0x00000004)
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2006-04-02 18:19:08 +00:00
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#define RNDIS_MSG_QUERY_C (RNDIS_MSG_QUERY|RNDIS_MSG_COMPLETION)
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2005-08-31 16:54:36 +00:00
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#define RNDIS_MSG_SET ccpu2(0x00000005)
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2006-04-02 18:19:08 +00:00
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#define RNDIS_MSG_SET_C (RNDIS_MSG_SET|RNDIS_MSG_COMPLETION)
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2005-08-31 16:54:36 +00:00
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#define RNDIS_MSG_RESET ccpu2(0x00000006)
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2006-04-02 18:19:08 +00:00
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#define RNDIS_MSG_RESET_C (RNDIS_MSG_RESET|RNDIS_MSG_COMPLETION)
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2005-08-31 16:54:36 +00:00
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#define RNDIS_MSG_INDICATE ccpu2(0x00000007)
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#define RNDIS_MSG_KEEPALIVE ccpu2(0x00000008)
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2006-04-02 18:19:08 +00:00
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#define RNDIS_MSG_KEEPALIVE_C (RNDIS_MSG_KEEPALIVE|RNDIS_MSG_COMPLETION)
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2005-08-31 16:54:36 +00:00
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/* codes for "status" field of completion messages */
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#define RNDIS_STATUS_SUCCESS ccpu2(0x00000000)
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#define RNDIS_STATUS_FAILURE ccpu2(0xc0000001)
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#define RNDIS_STATUS_INVALID_DATA ccpu2(0xc0010015)
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#define RNDIS_STATUS_NOT_SUPPORTED ccpu2(0xc00000bb)
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#define RNDIS_STATUS_MEDIA_CONNECT ccpu2(0x4001000b)
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#define RNDIS_STATUS_MEDIA_DISCONNECT ccpu2(0x4001000c)
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struct rndis_data_hdr {
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__le32 msg_type; /* RNDIS_MSG_PACKET */
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__le32 msg_len; // rndis_data_hdr + data_len + pad
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__le32 data_offset; // 36 -- right after header
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__le32 data_len; // ... real packet size
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__le32 oob_data_offset; // zero
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__le32 oob_data_len; // zero
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__le32 num_oob; // zero
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__le32 packet_data_offset; // zero
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__le32 packet_data_len; // zero
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__le32 vc_handle; // zero
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__le32 reserved; // zero
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} __attribute__ ((packed));
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struct rndis_init { /* OUT */
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// header and:
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__le32 msg_type; /* RNDIS_MSG_INIT */
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__le32 msg_len; // 24
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__le32 request_id;
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__le32 major_version; // of rndis (1.0)
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__le32 minor_version;
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__le32 max_transfer_size;
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} __attribute__ ((packed));
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struct rndis_init_c { /* IN */
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// header and:
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__le32 msg_type; /* RNDIS_MSG_INIT_C */
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__le32 msg_len;
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__le32 request_id;
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__le32 status;
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__le32 major_version; // of rndis (1.0)
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__le32 minor_version;
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__le32 device_flags;
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__le32 medium; // zero == 802.3
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__le32 max_packets_per_message;
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__le32 max_transfer_size;
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__le32 packet_alignment; // max 7; (1<<n) bytes
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__le32 af_list_offset; // zero
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__le32 af_list_size; // zero
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} __attribute__ ((packed));
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struct rndis_halt { /* OUT (no reply) */
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// header and:
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__le32 msg_type; /* RNDIS_MSG_HALT */
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__le32 msg_len;
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__le32 request_id;
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} __attribute__ ((packed));
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struct rndis_query { /* OUT */
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// header and:
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__le32 msg_type; /* RNDIS_MSG_QUERY */
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__le32 msg_len;
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__le32 request_id;
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__le32 oid;
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__le32 len;
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__le32 offset;
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/*?*/ __le32 handle; // zero
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} __attribute__ ((packed));
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struct rndis_query_c { /* IN */
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// header and:
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__le32 msg_type; /* RNDIS_MSG_QUERY_C */
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__le32 msg_len;
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__le32 request_id;
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__le32 status;
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__le32 len;
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__le32 offset;
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} __attribute__ ((packed));
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struct rndis_set { /* OUT */
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// header and:
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__le32 msg_type; /* RNDIS_MSG_SET */
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__le32 msg_len;
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__le32 request_id;
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__le32 oid;
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__le32 len;
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__le32 offset;
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/*?*/ __le32 handle; // zero
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} __attribute__ ((packed));
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struct rndis_set_c { /* IN */
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// header and:
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__le32 msg_type; /* RNDIS_MSG_SET_C */
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__le32 msg_len;
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__le32 request_id;
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__le32 status;
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} __attribute__ ((packed));
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struct rndis_reset { /* IN */
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// header and:
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__le32 msg_type; /* RNDIS_MSG_RESET */
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__le32 msg_len;
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__le32 reserved;
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} __attribute__ ((packed));
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struct rndis_reset_c { /* OUT */
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// header and:
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__le32 msg_type; /* RNDIS_MSG_RESET_C */
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__le32 msg_len;
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__le32 status;
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__le32 addressing_lost;
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} __attribute__ ((packed));
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struct rndis_indicate { /* IN (unrequested) */
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// header and:
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__le32 msg_type; /* RNDIS_MSG_INDICATE */
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__le32 msg_len;
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__le32 status;
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__le32 length;
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__le32 offset;
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/**/ __le32 diag_status;
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__le32 error_offset;
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/**/ __le32 message;
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} __attribute__ ((packed));
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struct rndis_keepalive { /* OUT (optionally IN) */
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// header and:
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__le32 msg_type; /* RNDIS_MSG_KEEPALIVE */
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__le32 msg_len;
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__le32 request_id;
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} __attribute__ ((packed));
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struct rndis_keepalive_c { /* IN (optionally OUT) */
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// header and:
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__le32 msg_type; /* RNDIS_MSG_KEEPALIVE_C */
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__le32 msg_len;
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__le32 request_id;
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__le32 status;
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} __attribute__ ((packed));
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/* NOTE: about 30 OIDs are "mandatory" for peripherals to support ... and
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* there are gobs more that may optionally be supported. We'll avoid as much
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* of that mess as possible.
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*/
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#define OID_802_3_PERMANENT_ADDRESS ccpu2(0x01010101)
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#define OID_GEN_CURRENT_PACKET_FILTER ccpu2(0x0001010e)
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/*
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* RNDIS notifications from device: command completion; "reverse"
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* keepalives; etc
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*/
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static void rndis_status(struct usbnet *dev, struct urb *urb)
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{
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devdbg(dev, "rndis status urb, len %d stat %d",
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urb->actual_length, urb->status);
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// FIXME for keepalives, respond immediately (asynchronously)
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// if not an RNDIS status, do like cdc_status(dev,urb) does
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}
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/*
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* RPC done RNDIS-style. Caller guarantees:
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* - message is properly byteswapped
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* - there's no other request pending
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* - buf can hold up to 1KB response (required by RNDIS spec)
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* On return, the first few entries are already byteswapped.
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*
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* Call context is likely probe(), before interface name is known,
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* which is why we won't try to use it in the diagnostics.
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*/
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static int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf)
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{
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struct cdc_state *info = (void *) &dev->data;
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int retval;
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unsigned count;
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__le32 rsp;
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u32 xid = 0, msg_len, request_id;
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/* REVISIT when this gets called from contexts other than probe() or
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* disconnect(): either serialize, or dispatch responses on xid
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*/
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/* Issue the request; don't bother byteswapping our xid */
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if (likely(buf->msg_type != RNDIS_MSG_HALT
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&& buf->msg_type != RNDIS_MSG_RESET)) {
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xid = dev->xid++;
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if (!xid)
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xid = dev->xid++;
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buf->request_id = (__force __le32) xid;
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}
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retval = usb_control_msg(dev->udev,
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usb_sndctrlpipe(dev->udev, 0),
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USB_CDC_SEND_ENCAPSULATED_COMMAND,
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USB_TYPE_CLASS | USB_RECIP_INTERFACE,
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0, info->u->bMasterInterface0,
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buf, le32_to_cpu(buf->msg_len),
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RNDIS_CONTROL_TIMEOUT_MS);
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if (unlikely(retval < 0 || xid == 0))
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return retval;
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// FIXME Seems like some devices discard responses when
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// we time out and cancel our "get response" requests...
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// so, this is fragile. Probably need to poll for status.
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/* ignore status endpoint, just poll the control channel;
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* the request probably completed immediately
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*/
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rsp = buf->msg_type | RNDIS_MSG_COMPLETION;
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for (count = 0; count < 10; count++) {
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memset(buf, 0, 1024);
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retval = usb_control_msg(dev->udev,
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usb_rcvctrlpipe(dev->udev, 0),
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USB_CDC_GET_ENCAPSULATED_RESPONSE,
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USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
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0, info->u->bMasterInterface0,
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buf, 1024,
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RNDIS_CONTROL_TIMEOUT_MS);
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if (likely(retval >= 8)) {
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msg_len = le32_to_cpu(buf->msg_len);
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request_id = (__force u32) buf->request_id;
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if (likely(buf->msg_type == rsp)) {
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if (likely(request_id == xid)) {
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if (unlikely(rsp == RNDIS_MSG_RESET_C))
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return 0;
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if (likely(RNDIS_STATUS_SUCCESS
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== buf->status))
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return 0;
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dev_dbg(&info->control->dev,
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"rndis reply status %08x\n",
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le32_to_cpu(buf->status));
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return -EL3RST;
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}
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dev_dbg(&info->control->dev,
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"rndis reply id %d expected %d\n",
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request_id, xid);
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/* then likely retry */
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} else switch (buf->msg_type) {
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case RNDIS_MSG_INDICATE: { /* fault */
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// struct rndis_indicate *msg = (void *)buf;
|
|
|
|
dev_info(&info->control->dev,
|
|
|
|
"rndis fault indication\n");
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case RNDIS_MSG_KEEPALIVE: { /* ping */
|
|
|
|
struct rndis_keepalive_c *msg = (void *)buf;
|
|
|
|
|
|
|
|
msg->msg_type = RNDIS_MSG_KEEPALIVE_C;
|
|
|
|
msg->msg_len = ccpu2(sizeof *msg);
|
|
|
|
msg->status = RNDIS_STATUS_SUCCESS;
|
|
|
|
retval = usb_control_msg(dev->udev,
|
|
|
|
usb_sndctrlpipe(dev->udev, 0),
|
|
|
|
USB_CDC_SEND_ENCAPSULATED_COMMAND,
|
|
|
|
USB_TYPE_CLASS | USB_RECIP_INTERFACE,
|
|
|
|
0, info->u->bMasterInterface0,
|
|
|
|
msg, sizeof *msg,
|
|
|
|
RNDIS_CONTROL_TIMEOUT_MS);
|
|
|
|
if (unlikely(retval < 0))
|
|
|
|
dev_dbg(&info->control->dev,
|
|
|
|
"rndis keepalive err %d\n",
|
|
|
|
retval);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
dev_dbg(&info->control->dev,
|
|
|
|
"unexpected rndis msg %08x len %d\n",
|
|
|
|
le32_to_cpu(buf->msg_type), msg_len);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
/* device probably issued a protocol stall; ignore */
|
|
|
|
dev_dbg(&info->control->dev,
|
|
|
|
"rndis response error, code %d\n", retval);
|
|
|
|
}
|
|
|
|
msleep(2);
|
|
|
|
}
|
|
|
|
dev_dbg(&info->control->dev, "rndis response timeout\n");
|
|
|
|
return -ETIMEDOUT;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
|
|
|
|
{
|
|
|
|
int retval;
|
|
|
|
struct net_device *net = dev->net;
|
|
|
|
union {
|
|
|
|
void *buf;
|
|
|
|
struct rndis_msg_hdr *header;
|
|
|
|
struct rndis_init *init;
|
|
|
|
struct rndis_init_c *init_c;
|
|
|
|
struct rndis_query *get;
|
|
|
|
struct rndis_query_c *get_c;
|
|
|
|
struct rndis_set *set;
|
|
|
|
struct rndis_set_c *set_c;
|
|
|
|
} u;
|
|
|
|
u32 tmp;
|
|
|
|
|
|
|
|
/* we can't rely on i/o from stack working, or stack allocation */
|
|
|
|
u.buf = kmalloc(1024, GFP_KERNEL);
|
|
|
|
if (!u.buf)
|
|
|
|
return -ENOMEM;
|
|
|
|
retval = usbnet_generic_cdc_bind(dev, intf);
|
|
|
|
if (retval < 0)
|
|
|
|
goto done;
|
|
|
|
|
|
|
|
net->hard_header_len += sizeof (struct rndis_data_hdr);
|
|
|
|
|
|
|
|
/* initialize; max transfer is 16KB at full speed */
|
|
|
|
u.init->msg_type = RNDIS_MSG_INIT;
|
|
|
|
u.init->msg_len = ccpu2(sizeof *u.init);
|
|
|
|
u.init->major_version = ccpu2(1);
|
|
|
|
u.init->minor_version = ccpu2(0);
|
|
|
|
u.init->max_transfer_size = ccpu2(net->mtu + net->hard_header_len);
|
|
|
|
|
|
|
|
retval = rndis_command(dev, u.header);
|
|
|
|
if (unlikely(retval < 0)) {
|
|
|
|
/* it might not even be an RNDIS device!! */
|
|
|
|
dev_err(&intf->dev, "RNDIS init failed, %d\n", retval);
|
|
|
|
fail:
|
|
|
|
usb_driver_release_interface(driver_of(intf),
|
|
|
|
((struct cdc_state *)&(dev->data))->data);
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
dev->hard_mtu = le32_to_cpu(u.init_c->max_transfer_size);
|
|
|
|
/* REVISIT: peripheral "alignment" request is ignored ... */
|
|
|
|
dev_dbg(&intf->dev, "hard mtu %u, align %d\n", dev->hard_mtu,
|
|
|
|
1 << le32_to_cpu(u.init_c->packet_alignment));
|
|
|
|
|
|
|
|
/* get designated host ethernet address */
|
|
|
|
memset(u.get, 0, sizeof *u.get);
|
|
|
|
u.get->msg_type = RNDIS_MSG_QUERY;
|
|
|
|
u.get->msg_len = ccpu2(sizeof *u.get);
|
|
|
|
u.get->oid = OID_802_3_PERMANENT_ADDRESS;
|
|
|
|
|
|
|
|
retval = rndis_command(dev, u.header);
|
|
|
|
if (unlikely(retval < 0)) {
|
|
|
|
dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval);
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
tmp = le32_to_cpu(u.get_c->offset);
|
|
|
|
if (unlikely((tmp + 8) > (1024 - ETH_ALEN)
|
|
|
|
|| u.get_c->len != ccpu2(ETH_ALEN))) {
|
|
|
|
dev_err(&intf->dev, "rndis ethaddr off %d len %d ?\n",
|
|
|
|
tmp, le32_to_cpu(u.get_c->len));
|
|
|
|
retval = -EDOM;
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
memcpy(net->dev_addr, tmp + (char *)&u.get_c->request_id, ETH_ALEN);
|
|
|
|
|
|
|
|
/* set a nonzero filter to enable data transfers */
|
|
|
|
memset(u.set, 0, sizeof *u.set);
|
|
|
|
u.set->msg_type = RNDIS_MSG_SET;
|
|
|
|
u.set->msg_len = ccpu2(4 + sizeof *u.set);
|
|
|
|
u.set->oid = OID_GEN_CURRENT_PACKET_FILTER;
|
|
|
|
u.set->len = ccpu2(4);
|
|
|
|
u.set->offset = ccpu2((sizeof *u.set) - 8);
|
|
|
|
*(__le32 *)(u.buf + sizeof *u.set) = ccpu2(DEFAULT_FILTER);
|
|
|
|
|
|
|
|
retval = rndis_command(dev, u.header);
|
|
|
|
if (unlikely(retval < 0)) {
|
|
|
|
dev_err(&intf->dev, "rndis set packet filter, %d\n", retval);
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
retval = 0;
|
|
|
|
done:
|
|
|
|
kfree(u.buf);
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void rndis_unbind(struct usbnet *dev, struct usb_interface *intf)
|
|
|
|
{
|
|
|
|
struct rndis_halt *halt;
|
|
|
|
|
|
|
|
/* try to clear any rndis state/activity (no i/o from stack!) */
|
|
|
|
halt = kcalloc(1, sizeof *halt, SLAB_KERNEL);
|
|
|
|
if (halt) {
|
|
|
|
halt->msg_type = RNDIS_MSG_HALT;
|
|
|
|
halt->msg_len = ccpu2(sizeof *halt);
|
|
|
|
(void) rndis_command(dev, (void *)halt);
|
|
|
|
kfree(halt);
|
|
|
|
}
|
|
|
|
|
|
|
|
return usbnet_cdc_unbind(dev, intf);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DATA -- host must not write zlps
|
|
|
|
*/
|
|
|
|
static int rndis_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
/* peripheral may have batched packets to us... */
|
|
|
|
while (likely(skb->len)) {
|
|
|
|
struct rndis_data_hdr *hdr = (void *)skb->data;
|
|
|
|
struct sk_buff *skb2;
|
|
|
|
u32 msg_len, data_offset, data_len;
|
|
|
|
|
|
|
|
msg_len = le32_to_cpu(hdr->msg_len);
|
|
|
|
data_offset = le32_to_cpu(hdr->data_offset);
|
|
|
|
data_len = le32_to_cpu(hdr->data_len);
|
|
|
|
|
|
|
|
/* don't choke if we see oob, per-packet data, etc */
|
|
|
|
if (unlikely(hdr->msg_type != RNDIS_MSG_PACKET
|
|
|
|
|| skb->len < msg_len
|
|
|
|
|| (data_offset + data_len + 8) > msg_len)) {
|
|
|
|
dev->stats.rx_frame_errors++;
|
|
|
|
devdbg(dev, "bad rndis message %d/%d/%d/%d, len %d",
|
|
|
|
le32_to_cpu(hdr->msg_type),
|
|
|
|
msg_len, data_offset, data_len, skb->len);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
skb_pull(skb, 8 + data_offset);
|
|
|
|
|
|
|
|
/* at most one packet left? */
|
|
|
|
if (likely((data_len - skb->len) <= sizeof *hdr)) {
|
|
|
|
skb_trim(skb, data_len);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* try to return all the packets in the batch */
|
|
|
|
skb2 = skb_clone(skb, GFP_ATOMIC);
|
|
|
|
if (unlikely(!skb2))
|
|
|
|
break;
|
|
|
|
skb_pull(skb, msg_len - sizeof *hdr);
|
|
|
|
skb_trim(skb2, data_len);
|
|
|
|
usbnet_skb_return(dev, skb2);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* caller will usbnet_skb_return the remaining packet */
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct sk_buff *
|
2005-10-21 07:21:58 +00:00
|
|
|
rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
|
2005-08-31 16:54:36 +00:00
|
|
|
{
|
|
|
|
struct rndis_data_hdr *hdr;
|
|
|
|
struct sk_buff *skb2;
|
|
|
|
unsigned len = skb->len;
|
|
|
|
|
|
|
|
if (likely(!skb_cloned(skb))) {
|
|
|
|
int room = skb_headroom(skb);
|
|
|
|
|
|
|
|
/* enough head room as-is? */
|
|
|
|
if (unlikely((sizeof *hdr) <= room))
|
|
|
|
goto fill;
|
|
|
|
|
|
|
|
/* enough room, but needs to be readjusted? */
|
|
|
|
room += skb_tailroom(skb);
|
|
|
|
if (likely((sizeof *hdr) <= room)) {
|
|
|
|
skb->data = memmove(skb->head + sizeof *hdr,
|
|
|
|
skb->data, len);
|
|
|
|
skb->tail = skb->data + len;
|
|
|
|
goto fill;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* create a new skb, with the correct size (and tailpad) */
|
|
|
|
skb2 = skb_copy_expand(skb, sizeof *hdr, 1, flags);
|
|
|
|
dev_kfree_skb_any(skb);
|
|
|
|
if (unlikely(!skb2))
|
|
|
|
return skb2;
|
|
|
|
skb = skb2;
|
|
|
|
|
|
|
|
/* fill out the RNDIS header. we won't bother trying to batch
|
|
|
|
* packets; Linux minimizes wasted bandwidth through tx queues.
|
|
|
|
*/
|
|
|
|
fill:
|
|
|
|
hdr = (void *) __skb_push(skb, sizeof *hdr);
|
|
|
|
memset(hdr, 0, sizeof *hdr);
|
|
|
|
hdr->msg_type = RNDIS_MSG_PACKET;
|
|
|
|
hdr->msg_len = cpu_to_le32(skb->len);
|
|
|
|
hdr->data_offset = ccpu2(sizeof(*hdr) - 8);
|
|
|
|
hdr->data_len = cpu_to_le32(len);
|
|
|
|
|
|
|
|
/* FIXME make the last packet always be short ... */
|
|
|
|
return skb;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static const struct driver_info rndis_info = {
|
|
|
|
.description = "RNDIS device",
|
|
|
|
.flags = FLAG_ETHER | FLAG_FRAMING_RN,
|
|
|
|
.bind = rndis_bind,
|
|
|
|
.unbind = rndis_unbind,
|
|
|
|
.status = rndis_status,
|
|
|
|
.rx_fixup = rndis_rx_fixup,
|
|
|
|
.tx_fixup = rndis_tx_fixup,
|
|
|
|
};
|
|
|
|
|
|
|
|
#undef ccpu2
|
|
|
|
|
|
|
|
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
|
|
|
|
static const struct usb_device_id products [] = {
|
|
|
|
{
|
|
|
|
/* RNDIS is MSFT's un-official variant of CDC ACM */
|
|
|
|
USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
|
|
|
|
.driver_info = (unsigned long) &rndis_info,
|
|
|
|
},
|
|
|
|
{ }, // END
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(usb, products);
|
|
|
|
|
|
|
|
static struct usb_driver rndis_driver = {
|
|
|
|
.name = "rndis_host",
|
|
|
|
.id_table = products,
|
|
|
|
.probe = usbnet_probe,
|
|
|
|
.disconnect = usbnet_disconnect,
|
|
|
|
.suspend = usbnet_suspend,
|
|
|
|
.resume = usbnet_resume,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init rndis_init(void)
|
|
|
|
{
|
2006-04-02 18:19:08 +00:00
|
|
|
return usb_register(&rndis_driver);
|
2005-08-31 16:54:36 +00:00
|
|
|
}
|
|
|
|
module_init(rndis_init);
|
|
|
|
|
|
|
|
static void __exit rndis_exit(void)
|
|
|
|
{
|
2006-04-02 18:19:08 +00:00
|
|
|
usb_deregister(&rndis_driver);
|
2005-08-31 16:54:36 +00:00
|
|
|
}
|
|
|
|
module_exit(rndis_exit);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("David Brownell");
|
|
|
|
MODULE_DESCRIPTION("USB Host side RNDIS driver");
|
|
|
|
MODULE_LICENSE("GPL");
|