android_kernel_xiaomi_sm8350/drivers/usb/gadget/rndis.c
David Brownell 15b2d2b529 usb gadget: RNDIS cleanups
Some cleanup to the RNDIS code:

 - Minor bugfix:  rndis_unit() is supposed to put the link into the
   RNDIS_UNINITIALIZED state, which does not mean "unused".  There's
   a separate method to stop using the link.  (Bug doesn't affect
   anything right now because of how the code is used.)

 - Reduce coupling between RNDIS code and its user(s), in preparation
   for updates in that code:

    * Decouple RNDIS_RESPONSE_AVAILABLE notifications from net_device
      by passing just a void* handle.  (Also, remove the unused return
      value of the notification callback.)
    * When it needs a copy of net_device stats, just ask for it

 - Remove unused/untested code backing various never-used OIDs:

    * RNDIS_PM, RNDIS_WAKEUP ... "should" get implemented, but the
      relevant docs were unclear, ambguous, and incomplete.  Someone
      with access to the Hidden Gospels (maybe in the EU?) might be
      able to figure out what this should do.
    * RNDIS_OPTIONAL_STATS ... as the name suggests, optional.  Never
      implemented in part because not all the semantics were clear.
    * OID_GEN_RNDIS_CONFIG_PARAMETER, which has been #if 0 forever.

 - A few small whitespace fixes

Plus switch the VERBOSE symbol over to the newer VERBOSE_DEBUG style.

There should be no functional changes because of this patch; it's a
net source code shrink (because of the dead/unused code removal) and
a small object code shrink (a couple hundred bytes on ARMv5).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-21 15:16:10 -07:00

1195 lines
29 KiB
C

/*
* RNDIS MSG parser
*
* Authors: Benedikt Spranger, Pengutronix
* Robert Schwebel, Pengutronix
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2, as published by the Free Software Foundation.
*
* This software was originally developed in conformance with
* Microsoft's Remote NDIS Specification License Agreement.
*
* 03/12/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
* Fixed message length bug in init_response
*
* 03/25/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
* Fixed rndis_rm_hdr length bug.
*
* Copyright (C) 2004 by David Brownell
* updates to merge with Linux 2.6, better match RNDIS spec
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/netdevice.h>
#include <asm/io.h>
#include <asm/byteorder.h>
#include <asm/system.h>
#include <asm/unaligned.h>
#undef VERBOSE_DEBUG
#include "rndis.h"
/* The driver for your USB chip needs to support ep0 OUT to work with
* RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
*
* Windows hosts need an INF file like Documentation/usb/linux.inf
* and will be happier if you provide the host_addr module parameter.
*/
#if 0
static int rndis_debug = 0;
module_param (rndis_debug, int, 0);
MODULE_PARM_DESC (rndis_debug, "enable debugging");
#else
#define rndis_debug 0
#endif
#define DBG(str,args...) do { \
if (rndis_debug) \
pr_debug(str , ## args); \
} while (0)
#define RNDIS_MAX_CONFIGS 1
static rndis_params rndis_per_dev_params [RNDIS_MAX_CONFIGS];
/* Driver Version */
static const __le32 rndis_driver_version = __constant_cpu_to_le32 (1);
/* Function Prototypes */
static rndis_resp_t *rndis_add_response (int configNr, u32 length);
/* supported OIDs */
static const u32 oid_supported_list [] =
{
/* the general stuff */
OID_GEN_SUPPORTED_LIST,
OID_GEN_HARDWARE_STATUS,
OID_GEN_MEDIA_SUPPORTED,
OID_GEN_MEDIA_IN_USE,
OID_GEN_MAXIMUM_FRAME_SIZE,
OID_GEN_LINK_SPEED,
OID_GEN_TRANSMIT_BLOCK_SIZE,
OID_GEN_RECEIVE_BLOCK_SIZE,
OID_GEN_VENDOR_ID,
OID_GEN_VENDOR_DESCRIPTION,
OID_GEN_VENDOR_DRIVER_VERSION,
OID_GEN_CURRENT_PACKET_FILTER,
OID_GEN_MAXIMUM_TOTAL_SIZE,
OID_GEN_MEDIA_CONNECT_STATUS,
OID_GEN_PHYSICAL_MEDIUM,
/* the statistical stuff */
OID_GEN_XMIT_OK,
OID_GEN_RCV_OK,
OID_GEN_XMIT_ERROR,
OID_GEN_RCV_ERROR,
OID_GEN_RCV_NO_BUFFER,
#ifdef RNDIS_OPTIONAL_STATS
OID_GEN_DIRECTED_BYTES_XMIT,
OID_GEN_DIRECTED_FRAMES_XMIT,
OID_GEN_MULTICAST_BYTES_XMIT,
OID_GEN_MULTICAST_FRAMES_XMIT,
OID_GEN_BROADCAST_BYTES_XMIT,
OID_GEN_BROADCAST_FRAMES_XMIT,
OID_GEN_DIRECTED_BYTES_RCV,
OID_GEN_DIRECTED_FRAMES_RCV,
OID_GEN_MULTICAST_BYTES_RCV,
OID_GEN_MULTICAST_FRAMES_RCV,
OID_GEN_BROADCAST_BYTES_RCV,
OID_GEN_BROADCAST_FRAMES_RCV,
OID_GEN_RCV_CRC_ERROR,
OID_GEN_TRANSMIT_QUEUE_LENGTH,
#endif /* RNDIS_OPTIONAL_STATS */
/* mandatory 802.3 */
/* the general stuff */
OID_802_3_PERMANENT_ADDRESS,
OID_802_3_CURRENT_ADDRESS,
OID_802_3_MULTICAST_LIST,
OID_802_3_MAC_OPTIONS,
OID_802_3_MAXIMUM_LIST_SIZE,
/* the statistical stuff */
OID_802_3_RCV_ERROR_ALIGNMENT,
OID_802_3_XMIT_ONE_COLLISION,
OID_802_3_XMIT_MORE_COLLISIONS,
#ifdef RNDIS_OPTIONAL_STATS
OID_802_3_XMIT_DEFERRED,
OID_802_3_XMIT_MAX_COLLISIONS,
OID_802_3_RCV_OVERRUN,
OID_802_3_XMIT_UNDERRUN,
OID_802_3_XMIT_HEARTBEAT_FAILURE,
OID_802_3_XMIT_TIMES_CRS_LOST,
OID_802_3_XMIT_LATE_COLLISIONS,
#endif /* RNDIS_OPTIONAL_STATS */
#ifdef RNDIS_PM
/* PM and wakeup are "mandatory" for USB, but the RNDIS specs
* don't say what they mean ... and the NDIS specs are often
* confusing and/or ambiguous in this context. (That is, more
* so than their specs for the other OIDs.)
*
* FIXME someone who knows what these should do, please
* implement them!
*/
/* power management */
OID_PNP_CAPABILITIES,
OID_PNP_QUERY_POWER,
OID_PNP_SET_POWER,
#ifdef RNDIS_WAKEUP
/* wake up host */
OID_PNP_ENABLE_WAKE_UP,
OID_PNP_ADD_WAKE_UP_PATTERN,
OID_PNP_REMOVE_WAKE_UP_PATTERN,
#endif /* RNDIS_WAKEUP */
#endif /* RNDIS_PM */
};
/* NDIS Functions */
static int
gen_ndis_query_resp (int configNr, u32 OID, u8 *buf, unsigned buf_len,
rndis_resp_t *r)
{
int retval = -ENOTSUPP;
u32 length = 4; /* usually */
__le32 *outbuf;
int i, count;
rndis_query_cmplt_type *resp;
struct net_device *net;
struct net_device_stats *stats;
if (!r) return -ENOMEM;
resp = (rndis_query_cmplt_type *) r->buf;
if (!resp) return -ENOMEM;
if (buf_len && rndis_debug > 1) {
DBG("query OID %08x value, len %d:\n", OID, buf_len);
for (i = 0; i < buf_len; i += 16) {
DBG("%03d: %08x %08x %08x %08x\n", i,
get_unaligned_le32(&buf[i]),
get_unaligned_le32(&buf[i + 4]),
get_unaligned_le32(&buf[i + 8]),
get_unaligned_le32(&buf[i + 12]));
}
}
/* response goes here, right after the header */
outbuf = (__le32 *) &resp[1];
resp->InformationBufferOffset = __constant_cpu_to_le32 (16);
net = rndis_per_dev_params[configNr].dev;
if (net->get_stats)
stats = net->get_stats(net);
else
stats = NULL;
switch (OID) {
/* general oids (table 4-1) */
/* mandatory */
case OID_GEN_SUPPORTED_LIST:
DBG("%s: OID_GEN_SUPPORTED_LIST\n", __func__);
length = sizeof (oid_supported_list);
count = length / sizeof (u32);
for (i = 0; i < count; i++)
outbuf[i] = cpu_to_le32 (oid_supported_list[i]);
retval = 0;
break;
/* mandatory */
case OID_GEN_HARDWARE_STATUS:
DBG("%s: OID_GEN_HARDWARE_STATUS\n", __func__);
/* Bogus question!
* Hardware must be ready to receive high level protocols.
* BTW:
* reddite ergo quae sunt Caesaris Caesari
* et quae sunt Dei Deo!
*/
*outbuf = __constant_cpu_to_le32 (0);
retval = 0;
break;
/* mandatory */
case OID_GEN_MEDIA_SUPPORTED:
DBG("%s: OID_GEN_MEDIA_SUPPORTED\n", __func__);
*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr].medium);
retval = 0;
break;
/* mandatory */
case OID_GEN_MEDIA_IN_USE:
DBG("%s: OID_GEN_MEDIA_IN_USE\n", __func__);
/* one medium, one transport... (maybe you do it better) */
*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr].medium);
retval = 0;
break;
/* mandatory */
case OID_GEN_MAXIMUM_FRAME_SIZE:
DBG("%s: OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
if (rndis_per_dev_params [configNr].dev) {
*outbuf = cpu_to_le32 (
rndis_per_dev_params [configNr].dev->mtu);
retval = 0;
}
break;
/* mandatory */
case OID_GEN_LINK_SPEED:
if (rndis_debug > 1)
DBG("%s: OID_GEN_LINK_SPEED\n", __func__);
if (rndis_per_dev_params [configNr].media_state
== NDIS_MEDIA_STATE_DISCONNECTED)
*outbuf = __constant_cpu_to_le32 (0);
else
*outbuf = cpu_to_le32 (
rndis_per_dev_params [configNr].speed);
retval = 0;
break;
/* mandatory */
case OID_GEN_TRANSMIT_BLOCK_SIZE:
DBG("%s: OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
if (rndis_per_dev_params [configNr].dev) {
*outbuf = cpu_to_le32 (
rndis_per_dev_params [configNr].dev->mtu);
retval = 0;
}
break;
/* mandatory */
case OID_GEN_RECEIVE_BLOCK_SIZE:
DBG("%s: OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__);
if (rndis_per_dev_params [configNr].dev) {
*outbuf = cpu_to_le32 (
rndis_per_dev_params [configNr].dev->mtu);
retval = 0;
}
break;
/* mandatory */
case OID_GEN_VENDOR_ID:
DBG("%s: OID_GEN_VENDOR_ID\n", __func__);
*outbuf = cpu_to_le32 (
rndis_per_dev_params [configNr].vendorID);
retval = 0;
break;
/* mandatory */
case OID_GEN_VENDOR_DESCRIPTION:
DBG("%s: OID_GEN_VENDOR_DESCRIPTION\n", __func__);
length = strlen (rndis_per_dev_params [configNr].vendorDescr);
memcpy (outbuf,
rndis_per_dev_params [configNr].vendorDescr, length);
retval = 0;
break;
case OID_GEN_VENDOR_DRIVER_VERSION:
DBG("%s: OID_GEN_VENDOR_DRIVER_VERSION\n", __func__);
/* Created as LE */
*outbuf = rndis_driver_version;
retval = 0;
break;
/* mandatory */
case OID_GEN_CURRENT_PACKET_FILTER:
DBG("%s: OID_GEN_CURRENT_PACKET_FILTER\n", __func__);
*outbuf = cpu_to_le32 (*rndis_per_dev_params[configNr].filter);
retval = 0;
break;
/* mandatory */
case OID_GEN_MAXIMUM_TOTAL_SIZE:
DBG("%s: OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__);
*outbuf = __constant_cpu_to_le32(RNDIS_MAX_TOTAL_SIZE);
retval = 0;
break;
/* mandatory */
case OID_GEN_MEDIA_CONNECT_STATUS:
if (rndis_debug > 1)
DBG("%s: OID_GEN_MEDIA_CONNECT_STATUS\n", __func__);
*outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
.media_state);
retval = 0;
break;
case OID_GEN_PHYSICAL_MEDIUM:
DBG("%s: OID_GEN_PHYSICAL_MEDIUM\n", __func__);
*outbuf = __constant_cpu_to_le32 (0);
retval = 0;
break;
/* The RNDIS specification is incomplete/wrong. Some versions
* of MS-Windows expect OIDs that aren't specified there. Other
* versions emit undefined RNDIS messages. DOCUMENT ALL THESE!
*/
case OID_GEN_MAC_OPTIONS: /* from WinME */
DBG("%s: OID_GEN_MAC_OPTIONS\n", __func__);
*outbuf = __constant_cpu_to_le32(
NDIS_MAC_OPTION_RECEIVE_SERIALIZED
| NDIS_MAC_OPTION_FULL_DUPLEX);
retval = 0;
break;
/* statistics OIDs (table 4-2) */
/* mandatory */
case OID_GEN_XMIT_OK:
if (rndis_debug > 1)
DBG("%s: OID_GEN_XMIT_OK\n", __func__);
if (stats) {
*outbuf = cpu_to_le32(stats->tx_packets
- stats->tx_errors - stats->tx_dropped);
retval = 0;
}
break;
/* mandatory */
case OID_GEN_RCV_OK:
if (rndis_debug > 1)
DBG("%s: OID_GEN_RCV_OK\n", __func__);
if (stats) {
*outbuf = cpu_to_le32(stats->rx_packets
- stats->rx_errors - stats->rx_dropped);
retval = 0;
}
break;
/* mandatory */
case OID_GEN_XMIT_ERROR:
if (rndis_debug > 1)
DBG("%s: OID_GEN_XMIT_ERROR\n", __func__);
if (stats) {
*outbuf = cpu_to_le32(stats->tx_errors);
retval = 0;
}
break;
/* mandatory */
case OID_GEN_RCV_ERROR:
if (rndis_debug > 1)
DBG("%s: OID_GEN_RCV_ERROR\n", __func__);
if (stats) {
*outbuf = cpu_to_le32(stats->rx_errors);
retval = 0;
}
break;
/* mandatory */
case OID_GEN_RCV_NO_BUFFER:
DBG("%s: OID_GEN_RCV_NO_BUFFER\n", __func__);
if (stats) {
*outbuf = cpu_to_le32(stats->rx_dropped);
retval = 0;
}
break;
/* ieee802.3 OIDs (table 4-3) */
/* mandatory */
case OID_802_3_PERMANENT_ADDRESS:
DBG("%s: OID_802_3_PERMANENT_ADDRESS\n", __func__);
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:
DBG("%s: OID_802_3_CURRENT_ADDRESS\n", __func__);
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:
DBG("%s: OID_802_3_MULTICAST_LIST\n", __func__);
/* Multicast base address only */
*outbuf = __constant_cpu_to_le32 (0xE0000000);
retval = 0;
break;
/* mandatory */
case OID_802_3_MAXIMUM_LIST_SIZE:
DBG("%s: OID_802_3_MAXIMUM_LIST_SIZE\n", __func__);
/* Multicast base address only */
*outbuf = __constant_cpu_to_le32 (1);
retval = 0;
break;
case OID_802_3_MAC_OPTIONS:
DBG("%s: OID_802_3_MAC_OPTIONS\n", __func__);
break;
/* ieee802.3 statistics OIDs (table 4-4) */
/* mandatory */
case OID_802_3_RCV_ERROR_ALIGNMENT:
DBG("%s: OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__);
if (stats) {
*outbuf = cpu_to_le32(stats->rx_frame_errors);
retval = 0;
}
break;
/* mandatory */
case OID_802_3_XMIT_ONE_COLLISION:
DBG("%s: OID_802_3_XMIT_ONE_COLLISION\n", __func__);
*outbuf = __constant_cpu_to_le32 (0);
retval = 0;
break;
/* mandatory */
case OID_802_3_XMIT_MORE_COLLISIONS:
DBG("%s: OID_802_3_XMIT_MORE_COLLISIONS\n", __func__);
*outbuf = __constant_cpu_to_le32 (0);
retval = 0;
break;
default:
pr_warning("%s: query unknown OID 0x%08X\n",
__func__, 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) {
DBG("set OID %08x value, len %d:\n", OID, buf_len);
for (i = 0; i < buf_len; i += 16) {
DBG("%03d: %08x %08x %08x %08x\n", i,
get_unaligned_le32(&buf[i]),
get_unaligned_le32(&buf[i + 4]),
get_unaligned_le32(&buf[i + 8]),
get_unaligned_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)get_unaligned_le32(buf);
DBG("%s: OID_GEN_CURRENT_PACKET_FILTER %08x\n",
__func__, *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.
*/
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 */
DBG("%s: OID_802_3_MULTICAST_LIST\n", __func__);
retval = 0;
break;
default:
pr_warning("%s: set unknown OID 0x%08X, size %d\n",
__func__, 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;
struct rndis_params *params = rndis_per_dev_params + configNr;
if (!params->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 (
params->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);
params->resp_avail(params->v);
return 0;
}
static int rndis_query_response (int configNr, rndis_query_msg_type *buf)
{
rndis_query_cmplt_type *resp;
rndis_resp_t *r;
struct rndis_params *params = rndis_per_dev_params + configNr;
// DBG("%s: OID = %08X\n", __func__, cpu_to_le32(buf->OID));
if (!params->dev)
return -ENOTSUPP;
/*
* we need more memory:
* gen_ndis_query_resp expects enough space for
* rndis_query_cmplt_type followed by data.
* oid_supported_list is the largest data reply
*/
r = rndis_add_response (configNr,
sizeof (oid_supported_list) + sizeof(rndis_query_cmplt_type));
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);
params->resp_avail(params->v);
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;
struct rndis_params *params = rndis_per_dev_params + configNr;
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
DBG("%s: Length: %d\n", __func__, BufLength);
DBG("%s: Offset: %d\n", __func__, BufOffset);
DBG("%s: InfoBuffer: ", __func__);
for (i = 0; i < BufLength; i++) {
DBG("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
}
DBG("\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);
params->resp_avail(params->v);
return 0;
}
static int rndis_reset_response (int configNr, rndis_reset_msg_type *buf)
{
rndis_reset_cmplt_type *resp;
rndis_resp_t *r;
struct rndis_params *params = rndis_per_dev_params + configNr;
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);
params->resp_avail(params->v);
return 0;
}
static int rndis_keepalive_response (int configNr,
rndis_keepalive_msg_type *buf)
{
rndis_keepalive_cmplt_type *resp;
rndis_resp_t *r;
struct rndis_params *params = rndis_per_dev_params + configNr;
/* 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);
resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
params->resp_avail(params->v);
return 0;
}
/*
* Device to Host Comunication
*/
static int rndis_indicate_status_msg (int configNr, u32 status)
{
rndis_indicate_status_msg_type *resp;
rndis_resp_t *r;
struct rndis_params *params = rndis_per_dev_params + configNr;
if (params->state == RNDIS_UNINITIALIZED)
return -ENOTSUPP;
r = rndis_add_response (configNr,
sizeof (rndis_indicate_status_msg_type));
if (!r)
return -ENOMEM;
resp = (rndis_indicate_status_msg_type *) r->buf;
resp->MessageType = __constant_cpu_to_le32 (
REMOTE_NDIS_INDICATE_STATUS_MSG);
resp->MessageLength = __constant_cpu_to_le32 (20);
resp->Status = cpu_to_le32 (status);
resp->StatusBufferLength = __constant_cpu_to_le32 (0);
resp->StatusBufferOffset = __constant_cpu_to_le32 (0);
params->resp_avail(params->v);
return 0;
}
int rndis_signal_connect (int configNr)
{
rndis_per_dev_params [configNr].media_state
= NDIS_MEDIA_STATE_CONNECTED;
return rndis_indicate_status_msg (configNr,
RNDIS_STATUS_MEDIA_CONNECT);
}
int rndis_signal_disconnect (int configNr)
{
rndis_per_dev_params [configNr].media_state
= NDIS_MEDIA_STATE_DISCONNECTED;
return rndis_indicate_status_msg (configNr,
RNDIS_STATUS_MEDIA_DISCONNECT);
}
void rndis_uninit (int configNr)
{
u8 *buf;
u32 length;
if (configNr >= RNDIS_MAX_CONFIGS)
return;
rndis_per_dev_params [configNr].state = RNDIS_UNINITIALIZED;
/* drain the response queue */
while ((buf = rndis_get_next_response(configNr, &length)))
rndis_free_response(configNr, buf);
}
void rndis_set_host_mac (int configNr, const u8 *addr)
{
rndis_per_dev_params [configNr].host_mac = addr;
}
/*
* Message Parser
*/
int rndis_msg_parser (u8 configNr, u8 *buf)
{
u32 MsgType, MsgLength;
__le32 *tmp;
struct rndis_params *params;
if (!buf)
return -ENOMEM;
tmp = (__le32 *) buf;
MsgType = get_unaligned_le32(tmp++);
MsgLength = get_unaligned_le32(tmp++);
if (configNr >= RNDIS_MAX_CONFIGS)
return -ENOTSUPP;
params = &rndis_per_dev_params [configNr];
/* NOTE: RNDIS is *EXTREMELY* chatty ... Windows constantly polls for
* rx/tx statistics and link status, in addition to KEEPALIVE traffic
* and normal HC level polling to see if there's any IN traffic.
*/
/* For USB: responses may take up to 10 seconds */
switch (MsgType) {
case REMOTE_NDIS_INITIALIZE_MSG:
DBG("%s: REMOTE_NDIS_INITIALIZE_MSG\n",
__func__ );
params->state = RNDIS_INITIALIZED;
return rndis_init_response (configNr,
(rndis_init_msg_type *) buf);
case REMOTE_NDIS_HALT_MSG:
DBG("%s: REMOTE_NDIS_HALT_MSG\n",
__func__ );
params->state = RNDIS_UNINITIALIZED;
if (params->dev) {
netif_carrier_off (params->dev);
netif_stop_queue (params->dev);
}
return 0;
case REMOTE_NDIS_QUERY_MSG:
return rndis_query_response (configNr,
(rndis_query_msg_type *) buf);
case REMOTE_NDIS_SET_MSG:
return rndis_set_response (configNr,
(rndis_set_msg_type *) buf);
case REMOTE_NDIS_RESET_MSG:
DBG("%s: REMOTE_NDIS_RESET_MSG\n",
__func__ );
return rndis_reset_response (configNr,
(rndis_reset_msg_type *) buf);
case REMOTE_NDIS_KEEPALIVE_MSG:
/* For USB: host does this every 5 seconds */
if (rndis_debug > 1)
DBG("%s: REMOTE_NDIS_KEEPALIVE_MSG\n",
__func__ );
return rndis_keepalive_response (configNr,
(rndis_keepalive_msg_type *)
buf);
default:
/* At least Windows XP emits some undefined RNDIS messages.
* In one case those messages seemed to relate to the host
* suspending itself.
*/
pr_warning("%s: unknown RNDIS message 0x%08X len %d\n",
__func__ , MsgType, MsgLength);
{
unsigned i;
for (i = 0; i < MsgLength; i += 16) {
DBG("%03d: "
" %02x %02x %02x %02x"
" %02x %02x %02x %02x"
" %02x %02x %02x %02x"
" %02x %02x %02x %02x"
"\n",
i,
buf[i], buf [i+1],
buf[i+2], buf[i+3],
buf[i+4], buf [i+5],
buf[i+6], buf[i+7],
buf[i+8], buf [i+9],
buf[i+10], buf[i+11],
buf[i+12], buf [i+13],
buf[i+14], buf[i+15]);
}
}
break;
}
return -ENOTSUPP;
}
int rndis_register(void (*resp_avail)(void *v), void *v)
{
u8 i;
if (!resp_avail)
return -EINVAL;
for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
if (!rndis_per_dev_params [i].used) {
rndis_per_dev_params [i].used = 1;
rndis_per_dev_params [i].resp_avail = resp_avail;
rndis_per_dev_params [i].v = v;
DBG("%s: configNr = %d\n", __func__, i);
return i;
}
}
DBG("failed\n");
return -ENODEV;
}
void rndis_deregister (int configNr)
{
DBG("%s: \n", __func__ );
if (configNr >= RNDIS_MAX_CONFIGS) return;
rndis_per_dev_params [configNr].used = 0;
return;
}
int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
{
DBG("%s:\n", __func__ );
if (!dev)
return -EINVAL;
if (configNr >= RNDIS_MAX_CONFIGS) return -1;
rndis_per_dev_params [configNr].dev = dev;
rndis_per_dev_params [configNr].filter = cdc_filter;
return 0;
}
int rndis_set_param_vendor (u8 configNr, u32 vendorID, const char *vendorDescr)
{
DBG("%s:\n", __func__ );
if (!vendorDescr) return -1;
if (configNr >= RNDIS_MAX_CONFIGS) return -1;
rndis_per_dev_params [configNr].vendorID = vendorID;
rndis_per_dev_params [configNr].vendorDescr = vendorDescr;
return 0;
}
int rndis_set_param_medium (u8 configNr, u32 medium, u32 speed)
{
DBG("%s: %u %u\n", __func__, medium, speed);
if (configNr >= RNDIS_MAX_CONFIGS) return -1;
rndis_per_dev_params [configNr].medium = medium;
rndis_per_dev_params [configNr].speed = speed;
return 0;
}
void rndis_add_hdr (struct sk_buff *skb)
{
struct rndis_packet_msg_type *header;
if (!skb)
return;
header = (void *) skb_push (skb, sizeof *header);
memset (header, 0, sizeof *header);
header->MessageType = __constant_cpu_to_le32(REMOTE_NDIS_PACKET_MSG);
header->MessageLength = cpu_to_le32(skb->len);
header->DataOffset = __constant_cpu_to_le32 (36);
header->DataLength = cpu_to_le32(skb->len - sizeof *header);
}
void rndis_free_response (int configNr, u8 *buf)
{
rndis_resp_t *r;
struct list_head *act, *tmp;
list_for_each_safe (act, tmp,
&(rndis_per_dev_params [configNr].resp_queue))
{
r = list_entry (act, rndis_resp_t, list);
if (r && r->buf == buf) {
list_del (&r->list);
kfree (r);
}
}
}
u8 *rndis_get_next_response (int configNr, u32 *length)
{
rndis_resp_t *r;
struct list_head *act, *tmp;
if (!length) return NULL;
list_for_each_safe (act, tmp,
&(rndis_per_dev_params [configNr].resp_queue))
{
r = list_entry (act, rndis_resp_t, list);
if (!r->send) {
r->send = 1;
*length = r->length;
return r->buf;
}
}
return NULL;
}
static rndis_resp_t *rndis_add_response (int configNr, u32 length)
{
rndis_resp_t *r;
/* NOTE: this gets copied into ether.c USB_BUFSIZ bytes ... */
r = kmalloc (sizeof (rndis_resp_t) + length, GFP_ATOMIC);
if (!r) return NULL;
r->buf = (u8 *) (r + 1);
r->length = length;
r->send = 0;
list_add_tail (&r->list,
&(rndis_per_dev_params [configNr].resp_queue));
return r;
}
int rndis_rm_hdr(struct sk_buff *skb)
{
/* tmp points to a struct rndis_packet_msg_type */
__le32 *tmp = (void *) skb->data;
/* MessageType, MessageLength */
if (__constant_cpu_to_le32(REMOTE_NDIS_PACKET_MSG)
!= get_unaligned(tmp++))
return -EINVAL;
tmp++;
/* DataOffset, DataLength */
if (!skb_pull(skb, get_unaligned_le32(tmp++) + 8))
return -EOVERFLOW;
skb_trim(skb, get_unaligned_le32(tmp++));
return 0;
}
#ifdef CONFIG_USB_GADGET_DEBUG_FILES
static int rndis_proc_show(struct seq_file *m, void *v)
{
rndis_params *param = m->private;
seq_printf(m,
"Config Nr. %d\n"
"used : %s\n"
"state : %s\n"
"medium : 0x%08X\n"
"speed : %d\n"
"cable : %s\n"
"vendor ID : 0x%08X\n"
"vendor : %s\n",
param->confignr, (param->used) ? "y" : "n",
({ char *s = "?";
switch (param->state) {
case RNDIS_UNINITIALIZED:
s = "RNDIS_UNINITIALIZED"; break;
case RNDIS_INITIALIZED:
s = "RNDIS_INITIALIZED"; break;
case RNDIS_DATA_INITIALIZED:
s = "RNDIS_DATA_INITIALIZED"; break;
}; s; }),
param->medium,
(param->media_state) ? 0 : param->speed*100,
(param->media_state) ? "disconnected" : "connected",
param->vendorID, param->vendorDescr);
return 0;
}
static ssize_t rndis_proc_write(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
{
rndis_params *p = PDE(file->f_path.dentry->d_inode)->data;
u32 speed = 0;
int i, fl_speed = 0;
for (i = 0; i < count; i++) {
char c;
if (get_user(c, buffer))
return -EFAULT;
switch (c) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
fl_speed = 1;
speed = speed*10 + c - '0';
break;
case 'C':
case 'c':
rndis_signal_connect (p->confignr);
break;
case 'D':
case 'd':
rndis_signal_disconnect(p->confignr);
break;
default:
if (fl_speed) p->speed = speed;
else DBG("%c is not valid\n", c);
break;
}
buffer++;
}
return count;
}
static int rndis_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, rndis_proc_show, PDE(inode)->data);
}
static const struct file_operations rndis_proc_fops = {
.owner = THIS_MODULE,
.open = rndis_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = rndis_proc_write,
};
#define NAME_TEMPLATE "driver/rndis-%03d"
static struct proc_dir_entry *rndis_connect_state [RNDIS_MAX_CONFIGS];
#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
int __init rndis_init (void)
{
u8 i;
for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
#ifdef CONFIG_USB_GADGET_DEBUG_FILES
char name [20];
sprintf (name, NAME_TEMPLATE, i);
if (!(rndis_connect_state [i]
= proc_create_data(name, 0660, NULL,
&rndis_proc_fops,
(void *)(rndis_per_dev_params + i))))
{
DBG("%s :remove entries", __func__);
while (i) {
sprintf (name, NAME_TEMPLATE, --i);
remove_proc_entry (name, NULL);
}
DBG("\n");
return -EIO;
}
#endif
rndis_per_dev_params [i].confignr = i;
rndis_per_dev_params [i].used = 0;
rndis_per_dev_params [i].state = RNDIS_UNINITIALIZED;
rndis_per_dev_params [i].media_state
= NDIS_MEDIA_STATE_DISCONNECTED;
INIT_LIST_HEAD (&(rndis_per_dev_params [i].resp_queue));
}
return 0;
}
void rndis_exit (void)
{
#ifdef CONFIG_USB_GADGET_DEBUG_FILES
u8 i;
char name [20];
for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
sprintf (name, NAME_TEMPLATE, i);
remove_proc_entry (name, NULL);
}
#endif
}