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linux/drivers/net/usb/rndis_host.c
Thomas Sailer 500d2c2f7b rndis_host: reduce MTU instead of refusing to talk to devices with low max packet size 
This patch makes the host RNDIS driver talk to RNDIS devices with an MTU
less than 1.5k, instead of refusing to talk to such a device.

Signed-Off-by: Thomas Sailer <t.sailer@alumni.ethz.ch>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>

--

Hi Jeff,
are you the right person to send this to?
Nobody else seems to be wanting to forward this to Linus...

Thanks,
Tom

Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-25 03:34:59 -04:00

737 lines
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/*
* Host Side support for RNDIS Networking Links
* Copyright (C) 2005 by David Brownell
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
// #define DEBUG // error path messages, extra info
// #define VERBOSE // more; success messages
#include <linux/module.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/workqueue.h>
#include <linux/mii.h>
#include <linux/usb.h>
#include <linux/usb/cdc.h>
#include "usbnet.h"
/*
* RNDIS is NDIS remoted over USB. It's a MSFT variant of CDC ACM ... of
* course ACM was intended for modems, not Ethernet links! USB's standard
* for Ethernet links is "CDC Ethernet", which is significantly simpler.
*
* NOTE that Microsoft's "RNDIS 1.0" specification is incomplete. Issues
* include:
* - Power management in particular relies on information that's scattered
* through other documentation, and which is incomplete or incorrect even
* there.
* - There are various undocumented protocol requirements, such as the
* need to send unused garbage in control-OUT messages.
* - In some cases, MS-Windows will emit undocumented requests; this
* matters more to peripheral implementations than host ones.
*
* Moreover there's a no-open-specs variant of RNDIS called "ActiveSync".
*
* For these reasons and others, ** USE OF RNDIS IS STRONGLY DISCOURAGED ** in
* favor of such non-proprietary alternatives as CDC Ethernet or the newer (and
* currently rare) "Ethernet Emulation Model" (EEM).
*/
/*
* CONTROL uses CDC "encapsulated commands" with funky notifications.
* - control-out: SEND_ENCAPSULATED
* - interrupt-in: RESPONSE_AVAILABLE
* - control-in: GET_ENCAPSULATED
*
* We'll try to ignore the RESPONSE_AVAILABLE notifications.
*
* REVISIT some RNDIS implementations seem to have curious issues still
* to be resolved.
*/
struct rndis_msg_hdr {
__le32 msg_type; /* RNDIS_MSG_* */
__le32 msg_len;
// followed by data that varies between messages
__le32 request_id;
__le32 status;
// ... and more
} __attribute__ ((packed));
/* MS-Windows uses this strange size, but RNDIS spec says 1024 minimum */
#define CONTROL_BUFFER_SIZE 1025
/* RNDIS defines an (absurdly huge) 10 second control timeout,
* but ActiveSync seems to use a more usual 5 second timeout
* (which matches the USB 2.0 spec).
*/
#define RNDIS_CONTROL_TIMEOUT_MS (5 * 1000)
#define ccpu2 __constant_cpu_to_le32
#define RNDIS_MSG_COMPLETION ccpu2(0x80000000)
/* codes for "msg_type" field of rndis messages;
* only the data channel uses packet messages (maybe batched);
* everything else goes on the control channel.
*/
#define RNDIS_MSG_PACKET ccpu2(0x00000001) /* 1-N packets */
#define RNDIS_MSG_INIT ccpu2(0x00000002)
#define RNDIS_MSG_INIT_C (RNDIS_MSG_INIT|RNDIS_MSG_COMPLETION)
#define RNDIS_MSG_HALT ccpu2(0x00000003)
#define RNDIS_MSG_QUERY ccpu2(0x00000004)
#define RNDIS_MSG_QUERY_C (RNDIS_MSG_QUERY|RNDIS_MSG_COMPLETION)
#define RNDIS_MSG_SET ccpu2(0x00000005)
#define RNDIS_MSG_SET_C (RNDIS_MSG_SET|RNDIS_MSG_COMPLETION)
#define RNDIS_MSG_RESET ccpu2(0x00000006)
#define RNDIS_MSG_RESET_C (RNDIS_MSG_RESET|RNDIS_MSG_COMPLETION)
#define RNDIS_MSG_INDICATE ccpu2(0x00000007)
#define RNDIS_MSG_KEEPALIVE ccpu2(0x00000008)
#define RNDIS_MSG_KEEPALIVE_C (RNDIS_MSG_KEEPALIVE|RNDIS_MSG_COMPLETION)
/* codes for "status" field of completion messages */
#define RNDIS_STATUS_SUCCESS ccpu2(0x00000000)
#define RNDIS_STATUS_FAILURE ccpu2(0xc0000001)
#define RNDIS_STATUS_INVALID_DATA ccpu2(0xc0010015)
#define RNDIS_STATUS_NOT_SUPPORTED ccpu2(0xc00000bb)
#define RNDIS_STATUS_MEDIA_CONNECT ccpu2(0x4001000b)
#define RNDIS_STATUS_MEDIA_DISCONNECT ccpu2(0x4001000c)
struct rndis_data_hdr {
__le32 msg_type; /* RNDIS_MSG_PACKET */
__le32 msg_len; // rndis_data_hdr + data_len + pad
__le32 data_offset; // 36 -- right after header
__le32 data_len; // ... real packet size
__le32 oob_data_offset; // zero
__le32 oob_data_len; // zero
__le32 num_oob; // zero
__le32 packet_data_offset; // zero
__le32 packet_data_len; // zero
__le32 vc_handle; // zero
__le32 reserved; // zero
} __attribute__ ((packed));
struct rndis_init { /* OUT */
// header and:
__le32 msg_type; /* RNDIS_MSG_INIT */
__le32 msg_len; // 24
__le32 request_id;
__le32 major_version; // of rndis (1.0)
__le32 minor_version;
__le32 max_transfer_size;
} __attribute__ ((packed));
struct rndis_init_c { /* IN */
// header and:
__le32 msg_type; /* RNDIS_MSG_INIT_C */
__le32 msg_len;
__le32 request_id;
__le32 status;
__le32 major_version; // of rndis (1.0)
__le32 minor_version;
__le32 device_flags;
__le32 medium; // zero == 802.3
__le32 max_packets_per_message;
__le32 max_transfer_size;
__le32 packet_alignment; // max 7; (1<<n) bytes
__le32 af_list_offset; // zero
__le32 af_list_size; // zero
} __attribute__ ((packed));
struct rndis_halt { /* OUT (no reply) */
// header and:
__le32 msg_type; /* RNDIS_MSG_HALT */
__le32 msg_len;
__le32 request_id;
} __attribute__ ((packed));
struct rndis_query { /* OUT */
// header and:
__le32 msg_type; /* RNDIS_MSG_QUERY */
__le32 msg_len;
__le32 request_id;
__le32 oid;
__le32 len;
__le32 offset;
/*?*/ __le32 handle; // zero
} __attribute__ ((packed));
struct rndis_query_c { /* IN */
// header and:
__le32 msg_type; /* RNDIS_MSG_QUERY_C */
__le32 msg_len;
__le32 request_id;
__le32 status;
__le32 len;
__le32 offset;
} __attribute__ ((packed));
struct rndis_set { /* OUT */
// header and:
__le32 msg_type; /* RNDIS_MSG_SET */
__le32 msg_len;
__le32 request_id;
__le32 oid;
__le32 len;
__le32 offset;
/*?*/ __le32 handle; // zero
} __attribute__ ((packed));
struct rndis_set_c { /* IN */
// header and:
__le32 msg_type; /* RNDIS_MSG_SET_C */
__le32 msg_len;
__le32 request_id;
__le32 status;
} __attribute__ ((packed));
struct rndis_reset { /* IN */
// header and:
__le32 msg_type; /* RNDIS_MSG_RESET */
__le32 msg_len;
__le32 reserved;
} __attribute__ ((packed));
struct rndis_reset_c { /* OUT */
// header and:
__le32 msg_type; /* RNDIS_MSG_RESET_C */
__le32 msg_len;
__le32 status;
__le32 addressing_lost;
} __attribute__ ((packed));
struct rndis_indicate { /* IN (unrequested) */
// header and:
__le32 msg_type; /* RNDIS_MSG_INDICATE */
__le32 msg_len;
__le32 status;
__le32 length;
__le32 offset;
/**/ __le32 diag_status;
__le32 error_offset;
/**/ __le32 message;
} __attribute__ ((packed));
struct rndis_keepalive { /* OUT (optionally IN) */
// header and:
__le32 msg_type; /* RNDIS_MSG_KEEPALIVE */
__le32 msg_len;
__le32 request_id;
} __attribute__ ((packed));
struct rndis_keepalive_c { /* IN (optionally OUT) */
// header and:
__le32 msg_type; /* RNDIS_MSG_KEEPALIVE_C */
__le32 msg_len;
__le32 request_id;
__le32 status;
} __attribute__ ((packed));
/* NOTE: about 30 OIDs are "mandatory" for peripherals to support ... and
* there are gobs more that may optionally be supported. We'll avoid as much
* of that mess as possible.
*/
#define OID_802_3_PERMANENT_ADDRESS ccpu2(0x01010101)
#define OID_GEN_MAXIMUM_FRAME_SIZE ccpu2(0x00010106)
#define OID_GEN_CURRENT_PACKET_FILTER ccpu2(0x0001010e)
/*
* RNDIS notifications from device: command completion; "reverse"
* keepalives; etc
*/
static void rndis_status(struct usbnet *dev, struct urb *urb)
{
devdbg(dev, "rndis status urb, len %d stat %d",
urb->actual_length, urb->status);
// FIXME for keepalives, respond immediately (asynchronously)
// if not an RNDIS status, do like cdc_status(dev,urb) does
}
/*
* RPC done RNDIS-style. Caller guarantees:
* - message is properly byteswapped
* - there's no other request pending
* - buf can hold up to 1KB response (required by RNDIS spec)
* On return, the first few entries are already byteswapped.
*
* Call context is likely probe(), before interface name is known,
* which is why we won't try to use it in the diagnostics.
*/
static int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf)
{
struct cdc_state *info = (void *) &dev->data;
int master_ifnum;
int retval;
unsigned count;
__le32 rsp;
u32 xid = 0, msg_len, request_id;
/* REVISIT when this gets called from contexts other than probe() or
* disconnect(): either serialize, or dispatch responses on xid
*/
/* Issue the request; xid is unique, don't bother byteswapping it */
if (likely(buf->msg_type != RNDIS_MSG_HALT
&& buf->msg_type != RNDIS_MSG_RESET)) {
xid = dev->xid++;
if (!xid)
xid = dev->xid++;
buf->request_id = (__force __le32) xid;
}
master_ifnum = info->control->cur_altsetting->desc.bInterfaceNumber;
retval = usb_control_msg(dev->udev,
usb_sndctrlpipe(dev->udev, 0),
USB_CDC_SEND_ENCAPSULATED_COMMAND,
USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0, master_ifnum,
buf, le32_to_cpu(buf->msg_len),
RNDIS_CONTROL_TIMEOUT_MS);
if (unlikely(retval < 0 || xid == 0))
return retval;
// FIXME Seems like some devices discard responses when
// we time out and cancel our "get response" requests...
// so, this is fragile. Probably need to poll for status.
/* ignore status endpoint, just poll the control channel;
* the request probably completed immediately
*/
rsp = buf->msg_type | RNDIS_MSG_COMPLETION;
for (count = 0; count < 10; count++) {
memset(buf, 0, CONTROL_BUFFER_SIZE);
retval = usb_control_msg(dev->udev,
usb_rcvctrlpipe(dev->udev, 0),
USB_CDC_GET_ENCAPSULATED_RESPONSE,
USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0, master_ifnum,
buf, CONTROL_BUFFER_SIZE,
RNDIS_CONTROL_TIMEOUT_MS);
if (likely(retval >= 8)) {
msg_len = le32_to_cpu(buf->msg_len);
request_id = (__force u32) buf->request_id;
if (likely(buf->msg_type == rsp)) {
if (likely(request_id == xid)) {
if (unlikely(rsp == RNDIS_MSG_RESET_C))
return 0;
if (likely(RNDIS_STATUS_SUCCESS
== buf->status))
return 0;
dev_dbg(&info->control->dev,
"rndis reply status %08x\n",
le32_to_cpu(buf->status));
return -EL3RST;
}
dev_dbg(&info->control->dev,
"rndis reply id %d expected %d\n",
request_id, xid);
/* then likely retry */
} else switch (buf->msg_type) {
case RNDIS_MSG_INDICATE: { /* fault */
// 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, master_ifnum,
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;
}
/*
* rndis_query:
*
* Performs a query for @oid along with 0 or more bytes of payload as
* specified by @in_len. If @reply_len is not set to -1 then the reply
* length is checked against this value, resulting in an error if it
* doesn't match.
*
* NOTE: Adding a payload exactly or greater than the size of the expected
* response payload is an evident requirement MSFT added for ActiveSync.
*
* The only exception is for OIDs that return a variably sized response,
* in which case no payload should be added. This undocumented (and
* nonsensical!) issue was found by sniffing protocol requests from the
* ActiveSync 4.1 Windows driver.
*/
static int rndis_query(struct usbnet *dev, struct usb_interface *intf,
void *buf, u32 oid, u32 in_len,
void **reply, int *reply_len)
{
int retval;
union {
void *buf;
struct rndis_msg_hdr *header;
struct rndis_query *get;
struct rndis_query_c *get_c;
} u;
u32 off, len;
u.buf = buf;
memset(u.get, 0, sizeof *u.get + in_len);
u.get->msg_type = RNDIS_MSG_QUERY;
u.get->msg_len = cpu_to_le32(sizeof *u.get + in_len);
u.get->oid = oid;
u.get->len = cpu_to_le32(in_len);
u.get->offset = ccpu2(20);
retval = rndis_command(dev, u.header);
if (unlikely(retval < 0)) {
dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) failed, %d\n",
oid, retval);
return retval;
}
off = le32_to_cpu(u.get_c->offset);
len = le32_to_cpu(u.get_c->len);
if (unlikely((8 + off + len) > CONTROL_BUFFER_SIZE))
goto response_error;
if (*reply_len != -1 && len != *reply_len)
goto response_error;
*reply = (unsigned char *) &u.get_c->request_id + off;
*reply_len = len;
return retval;
response_error:
dev_err(&intf->dev, "RNDIS_MSG_QUERY(0x%08x) "
"invalid response - off %d len %d\n",
oid, off, len);
return -EDOM;
}
static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
{
int retval;
struct net_device *net = dev->net;
struct cdc_state *info = (void *) &dev->data;
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;
int reply_len;
unsigned char *bp;
/* we can't rely on i/o from stack working, or stack allocation */
u.buf = kmalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL);
if (!u.buf)
return -ENOMEM;
retval = usbnet_generic_cdc_bind(dev, intf);
if (retval < 0)
goto fail;
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);
/* max transfer (in spec) is 0x4000 at full speed, but for
* TX we'll stick to one Ethernet packet plus RNDIS framing.
* For RX we handle drivers that zero-pad to end-of-packet.
* Don't let userspace change these settings.
*
* NOTE: there still seems to be wierdness here, as if we need
* to do some more things to make sure WinCE targets accept this.
* They default to jumbograms of 8KB or 16KB, which is absurd
* for such low data rates and which is also more than Linux
* can usually expect to allocate for SKB data...
*/
net->hard_header_len += sizeof (struct rndis_data_hdr);
dev->hard_mtu = net->mtu + net->hard_header_len;
dev->rx_urb_size = dev->hard_mtu + (dev->maxpacket + 1);
dev->rx_urb_size &= ~(dev->maxpacket - 1);
u.init->max_transfer_size = cpu_to_le32(dev->rx_urb_size);
net->change_mtu = NULL;
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);
goto fail_and_release;
}
tmp = le32_to_cpu(u.init_c->max_transfer_size);
if (tmp < dev->hard_mtu) {
if (tmp <= net->hard_header_len) {
dev_err(&intf->dev,
"dev can't take %u byte packets (max %u)\n",
dev->hard_mtu, tmp);
retval = -EINVAL;
goto fail_and_release;
}
dev->hard_mtu = tmp;
net->mtu = dev->hard_mtu - net->hard_header_len;
dev_warn(&intf->dev,
"dev can't take %u byte packets (max %u), "
"adjusting MTU to %u\n",
dev->hard_mtu, tmp, net->mtu);
}
/* REVISIT: peripheral "alignment" request is ignored ... */
dev_dbg(&intf->dev,
"hard mtu %u (%u from dev), rx buflen %Zu, align %d\n",
dev->hard_mtu, tmp, dev->rx_urb_size,
1 << le32_to_cpu(u.init_c->packet_alignment));
/* Get designated host ethernet address */
reply_len = ETH_ALEN;
retval = rndis_query(dev, intf, u.buf, OID_802_3_PERMANENT_ADDRESS,
48, (void **) &bp, &reply_len);
if (unlikely(retval< 0)) {
dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval);
goto fail_and_release;
}
memcpy(net->dev_addr, bp, 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_and_release;
}
retval = 0;
kfree(u.buf);
return retval;
fail_and_release:
usb_set_intfdata(info->data, NULL);
usb_driver_release_interface(driver_of(intf), info->data);
info->data = NULL;
fail:
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 = kzalloc(sizeof *halt, GFP_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 *
rndis_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
{
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_set_tail_pointer(skb, 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 | FLAG_NO_SETINT,
.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,
}, {
/* "ActiveSync" is an undocumented variant of RNDIS, used in WM5 */
USB_INTERFACE_INFO(USB_CLASS_MISC, 1, 1),
.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)
{
return usb_register(&rndis_driver);
}
module_init(rndis_init);
static void __exit rndis_exit(void)
{
usb_deregister(&rndis_driver);
}
module_exit(rndis_exit);
MODULE_AUTHOR("David Brownell");
MODULE_DESCRIPTION("USB Host side RNDIS driver");
MODULE_LICENSE("GPL");
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