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WSL2-Linux-Kernel/drivers/usb/gadget/rndis.c

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29 KiB
C
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/*
* 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
}
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