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android_kernel_samsung_hero.../drivers/usb/gadget/function/rndis.c
HackerOO7 2bd1731e0a init: OSRC G9300ZCU2APF7
2016-08-17 16:41:52 +08:00

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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/list.h>
#include <linux/proc_fs.h>
#include <linux/slab.h>
#include <linux/seq_file.h>
#include <linux/netdevice.h>
#include <asm/io.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
#include "u_rndis.h"
#include "u_bam_data.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 RNDIS_MAX_CONFIGS 1
int rndis_ul_max_pkt_per_xfer_rcvd;
module_param(rndis_ul_max_pkt_per_xfer_rcvd, int, S_IRUGO);
MODULE_PARM_DESC(rndis_ul_max_pkt_per_xfer_rcvd,
"Max num of REMOTE_NDIS_PACKET_MSGs received in a single transfer");
int rndis_ul_max_xfer_size_rcvd;
module_param(rndis_ul_max_xfer_size_rcvd, int, S_IRUGO);
MODULE_PARM_DESC(rndis_ul_max_xfer_size_rcvd,
"Max size of bus transfer received");
static rndis_params rndis_per_dev_params[RNDIS_MAX_CONFIGS];
/* Driver Version */
static const __le32 rndis_driver_version = 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 */
RNDIS_OID_GEN_SUPPORTED_LIST,
RNDIS_OID_GEN_HARDWARE_STATUS,
RNDIS_OID_GEN_MEDIA_SUPPORTED,
RNDIS_OID_GEN_MEDIA_IN_USE,
RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
RNDIS_OID_GEN_LINK_SPEED,
RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE,
RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE,
RNDIS_OID_GEN_VENDOR_ID,
RNDIS_OID_GEN_VENDOR_DESCRIPTION,
RNDIS_OID_GEN_VENDOR_DRIVER_VERSION,
RNDIS_OID_GEN_CURRENT_PACKET_FILTER,
RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE,
RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
RNDIS_OID_GEN_PHYSICAL_MEDIUM,
/* the statistical stuff */
RNDIS_OID_GEN_XMIT_OK,
RNDIS_OID_GEN_RCV_OK,
RNDIS_OID_GEN_XMIT_ERROR,
RNDIS_OID_GEN_RCV_ERROR,
RNDIS_OID_GEN_RCV_NO_BUFFER,
#ifdef RNDIS_OPTIONAL_STATS
RNDIS_OID_GEN_DIRECTED_BYTES_XMIT,
RNDIS_OID_GEN_DIRECTED_FRAMES_XMIT,
RNDIS_OID_GEN_MULTICAST_BYTES_XMIT,
RNDIS_OID_GEN_MULTICAST_FRAMES_XMIT,
RNDIS_OID_GEN_BROADCAST_BYTES_XMIT,
RNDIS_OID_GEN_BROADCAST_FRAMES_XMIT,
RNDIS_OID_GEN_DIRECTED_BYTES_RCV,
RNDIS_OID_GEN_DIRECTED_FRAMES_RCV,
RNDIS_OID_GEN_MULTICAST_BYTES_RCV,
RNDIS_OID_GEN_MULTICAST_FRAMES_RCV,
RNDIS_OID_GEN_BROADCAST_BYTES_RCV,
RNDIS_OID_GEN_BROADCAST_FRAMES_RCV,
RNDIS_OID_GEN_RCV_CRC_ERROR,
RNDIS_OID_GEN_TRANSMIT_QUEUE_LENGTH,
#endif /* RNDIS_OPTIONAL_STATS */
/* mandatory 802.3 */
/* the general stuff */
RNDIS_OID_802_3_PERMANENT_ADDRESS,
RNDIS_OID_802_3_CURRENT_ADDRESS,
RNDIS_OID_802_3_MULTICAST_LIST,
RNDIS_OID_802_3_MAC_OPTIONS,
RNDIS_OID_802_3_MAXIMUM_LIST_SIZE,
/* the statistical stuff */
RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT,
RNDIS_OID_802_3_XMIT_ONE_COLLISION,
RNDIS_OID_802_3_XMIT_MORE_COLLISIONS,
#ifdef RNDIS_OPTIONAL_STATS
RNDIS_OID_802_3_XMIT_DEFERRED,
RNDIS_OID_802_3_XMIT_MAX_COLLISIONS,
RNDIS_OID_802_3_RCV_OVERRUN,
RNDIS_OID_802_3_XMIT_UNDERRUN,
RNDIS_OID_802_3_XMIT_HEARTBEAT_FAILURE,
RNDIS_OID_802_3_XMIT_TIMES_CRS_LOST,
RNDIS_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 rtnl_link_stats64 temp;
const struct rtnl_link_stats64 *stats;
if (!r) return -ENOMEM;
resp = (rndis_query_cmplt_type *)r->buf;
if (!resp) return -ENOMEM;
if (buf_len && rndis_debug > 1) {
pr_debug("query OID %08x value, len %d:\n", OID, buf_len);
for (i = 0; i < buf_len; i += 16) {
pr_debug("%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 = cpu_to_le32(16);
net = rndis_per_dev_params[configNr].dev;
stats = dev_get_stats(net, &temp);
switch (OID) {
/* general oids (table 4-1) */
/* mandatory */
case RNDIS_OID_GEN_SUPPORTED_LIST:
pr_debug("%s: RNDIS_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 RNDIS_OID_GEN_HARDWARE_STATUS:
pr_debug("%s: RNDIS_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 = cpu_to_le32(0);
retval = 0;
break;
/* mandatory */
case RNDIS_OID_GEN_MEDIA_SUPPORTED:
pr_debug("%s: RNDIS_OID_GEN_MEDIA_SUPPORTED\n", __func__);
*outbuf = cpu_to_le32(rndis_per_dev_params[configNr].medium);
retval = 0;
break;
/* mandatory */
case RNDIS_OID_GEN_MEDIA_IN_USE:
pr_debug("%s: RNDIS_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 RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE:
pr_debug("%s: RNDIS_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 RNDIS_OID_GEN_LINK_SPEED:
if (rndis_debug > 1)
pr_debug("%s: RNDIS_OID_GEN_LINK_SPEED\n", __func__);
if (rndis_per_dev_params[configNr].media_state
== RNDIS_MEDIA_STATE_DISCONNECTED)
*outbuf = cpu_to_le32(0);
else
*outbuf = cpu_to_le32(
rndis_per_dev_params[configNr].speed);
retval = 0;
break;
/* mandatory */
case RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE:
pr_debug("%s: RNDIS_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 RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE:
pr_debug("%s: RNDIS_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 RNDIS_OID_GEN_VENDOR_ID:
pr_debug("%s: RNDIS_OID_GEN_VENDOR_ID\n", __func__);
*outbuf = cpu_to_le32(
rndis_per_dev_params[configNr].vendorID);
retval = 0;
break;
/* mandatory */
case RNDIS_OID_GEN_VENDOR_DESCRIPTION:
pr_debug("%s: RNDIS_OID_GEN_VENDOR_DESCRIPTION\n", __func__);
if (rndis_per_dev_params[configNr].vendorDescr) {
length = strlen(rndis_per_dev_params[configNr].
vendorDescr);
memcpy(outbuf,
rndis_per_dev_params[configNr].vendorDescr,
length);
} else {
outbuf[0] = 0;
}
retval = 0;
break;
case RNDIS_OID_GEN_VENDOR_DRIVER_VERSION:
pr_debug("%s: RNDIS_OID_GEN_VENDOR_DRIVER_VERSION\n", __func__);
/* Created as LE */
*outbuf = rndis_driver_version;
retval = 0;
break;
/* mandatory */
case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER\n", __func__);
*outbuf = cpu_to_le32(*rndis_per_dev_params[configNr].filter);
retval = 0;
break;
/* mandatory */
case RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE:
pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__);
*outbuf = cpu_to_le32(RNDIS_MAX_TOTAL_SIZE);
retval = 0;
break;
/* mandatory */
case RNDIS_OID_GEN_MEDIA_CONNECT_STATUS:
if (rndis_debug > 1)
pr_debug("%s: RNDIS_OID_GEN_MEDIA_CONNECT_STATUS\n", __func__);
*outbuf = cpu_to_le32(rndis_per_dev_params[configNr]
.media_state);
retval = 0;
break;
case RNDIS_OID_GEN_PHYSICAL_MEDIUM:
pr_debug("%s: RNDIS_OID_GEN_PHYSICAL_MEDIUM\n", __func__);
*outbuf = 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 RNDIS_OID_GEN_MAC_OPTIONS: /* from WinME */
pr_debug("%s: RNDIS_OID_GEN_MAC_OPTIONS\n", __func__);
*outbuf = cpu_to_le32(
RNDIS_MAC_OPTION_RECEIVE_SERIALIZED
| RNDIS_MAC_OPTION_FULL_DUPLEX);
retval = 0;
break;
/* statistics OIDs (table 4-2) */
/* mandatory */
case RNDIS_OID_GEN_XMIT_OK:
if (rndis_debug > 1)
pr_debug("%s: RNDIS_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 RNDIS_OID_GEN_RCV_OK:
if (rndis_debug > 1)
pr_debug("%s: RNDIS_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 RNDIS_OID_GEN_XMIT_ERROR:
if (rndis_debug > 1)
pr_debug("%s: RNDIS_OID_GEN_XMIT_ERROR\n", __func__);
if (stats) {
*outbuf = cpu_to_le32(stats->tx_errors);
retval = 0;
}
break;
/* mandatory */
case RNDIS_OID_GEN_RCV_ERROR:
if (rndis_debug > 1)
pr_debug("%s: RNDIS_OID_GEN_RCV_ERROR\n", __func__);
if (stats) {
*outbuf = cpu_to_le32(stats->rx_errors);
retval = 0;
}
break;
/* mandatory */
case RNDIS_OID_GEN_RCV_NO_BUFFER:
pr_debug("%s: RNDIS_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 RNDIS_OID_802_3_PERMANENT_ADDRESS:
pr_debug("%s: RNDIS_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 RNDIS_OID_802_3_CURRENT_ADDRESS:
pr_debug("%s: RNDIS_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 RNDIS_OID_802_3_MULTICAST_LIST:
pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
/* Multicast base address only */
*outbuf = cpu_to_le32(0xE0000000);
retval = 0;
break;
/* mandatory */
case RNDIS_OID_802_3_MAXIMUM_LIST_SIZE:
pr_debug("%s: RNDIS_OID_802_3_MAXIMUM_LIST_SIZE\n", __func__);
/* Multicast base address only */
*outbuf = cpu_to_le32(1);
retval = 0;
break;
case RNDIS_OID_802_3_MAC_OPTIONS:
pr_debug("%s: RNDIS_OID_802_3_MAC_OPTIONS\n", __func__);
*outbuf = cpu_to_le32(0);
retval = 0;
break;
/* ieee802.3 statistics OIDs (table 4-4) */
/* mandatory */
case RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT:
pr_debug("%s: RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__);
if (stats) {
*outbuf = cpu_to_le32(stats->rx_frame_errors);
retval = 0;
}
break;
/* mandatory */
case RNDIS_OID_802_3_XMIT_ONE_COLLISION:
pr_debug("%s: RNDIS_OID_802_3_XMIT_ONE_COLLISION\n", __func__);
*outbuf = cpu_to_le32(0);
retval = 0;
break;
/* mandatory */
case RNDIS_OID_802_3_XMIT_MORE_COLLISIONS:
pr_debug("%s: RNDIS_OID_802_3_XMIT_MORE_COLLISIONS\n", __func__);
*outbuf = 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) {
pr_debug("set OID %08x value, len %d:\n", OID, buf_len);
for (i = 0; i < buf_len; i += 16) {
pr_debug("%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 RNDIS_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);
pr_debug("%s: RNDIS_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) {
pr_debug("%s(): disable flow control\n", __func__);
rndis_flow_control(configNr, false);
} else {
pr_debug("%s(): enable flow control\n", __func__);
rndis_flow_control(configNr, true);
}
break;
case RNDIS_OID_802_3_MULTICAST_LIST:
/* I think we can ignore this */
pr_debug("%s: RNDIS_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 = cpu_to_le32(RNDIS_MSG_INIT_C);
resp->MessageLength = cpu_to_le32(52);
resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
resp->MajorVersion = cpu_to_le32(RNDIS_MAJOR_VERSION);
resp->MinorVersion = cpu_to_le32(RNDIS_MINOR_VERSION);
resp->DeviceFlags = cpu_to_le32(RNDIS_DF_CONNECTIONLESS);
resp->Medium = cpu_to_le32(RNDIS_MEDIUM_802_3);
resp->MaxPacketsPerTransfer = cpu_to_le32(params->max_pkt_per_xfer);
resp->MaxTransferSize = cpu_to_le32(params->max_pkt_per_xfer *
(params->dev->mtu
+ sizeof(struct ethhdr)
+ sizeof(struct rndis_packet_msg_type)
+ 22));
resp->PacketAlignmentFactor = cpu_to_le32(params->pkt_alignment_factor);
resp->AFListOffset = cpu_to_le32(0);
resp->AFListSize = cpu_to_le32(0);
params->ul_max_xfer_size = le32_to_cpu(resp->MaxTransferSize);
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;
/* pr_debug("%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 = cpu_to_le32(RNDIS_MSG_QUERY_C);
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 = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
resp->MessageLength = cpu_to_le32(sizeof *resp);
resp->InformationBufferLength = cpu_to_le32(0);
resp->InformationBufferOffset = cpu_to_le32(0);
} else
resp->Status = 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
pr_debug("%s: Length: %d\n", __func__, BufLength);
pr_debug("%s: Offset: %d\n", __func__, BufOffset);
pr_debug("%s: InfoBuffer: ", __func__);
for (i = 0; i < BufLength; i++) {
pr_debug("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
}
pr_debug("\n");
#endif
resp->MessageType = cpu_to_le32(RNDIS_MSG_SET_C);
resp->MessageLength = 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 = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
else
resp->Status = 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;
u32 length;
u8 *xbuf;
/* drain the response queue */
while ((xbuf = rndis_get_next_response(configNr, &length)))
rndis_free_response(configNr, xbuf);
r = rndis_add_response(configNr, sizeof(rndis_reset_cmplt_type));
if (!r)
return -ENOMEM;
resp = (rndis_reset_cmplt_type *)r->buf;
resp->MessageType = cpu_to_le32(RNDIS_MSG_RESET_C);
resp->MessageLength = cpu_to_le32(16);
resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
/* resent information */
resp->AddressingReset = 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 = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C);
resp->MessageLength = cpu_to_le32(16);
resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
resp->Status = 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 = cpu_to_le32(RNDIS_MSG_INDICATE);
resp->MessageLength = cpu_to_le32(20);
resp->Status = cpu_to_le32(status);
resp->StatusBufferLength = cpu_to_le32(0);
resp->StatusBufferOffset = cpu_to_le32(0);
params->resp_avail(params->v);
return 0;
}
int rndis_signal_connect(int configNr)
{
rndis_per_dev_params[configNr].media_state
= RNDIS_MEDIA_STATE_CONNECTED;
return rndis_indicate_status_msg(configNr,
RNDIS_STATUS_MEDIA_CONNECT);
}
EXPORT_SYMBOL_GPL(rndis_signal_connect);
int rndis_signal_disconnect(int configNr)
{
rndis_per_dev_params[configNr].media_state
= RNDIS_MEDIA_STATE_DISCONNECTED;
return rndis_indicate_status_msg(configNr,
RNDIS_STATUS_MEDIA_DISCONNECT);
}
EXPORT_SYMBOL_GPL(rndis_signal_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);
}
EXPORT_SYMBOL_GPL(rndis_uninit);
void rndis_set_host_mac(int configNr, const u8 *addr)
{
rndis_per_dev_params[configNr].host_mac = addr;
}
EXPORT_SYMBOL_GPL(rndis_set_host_mac);
/*
* Message Parser
*/
int rndis_msg_parser(u8 configNr, u8 *buf)
{
u32 MsgType, MsgLength, major, minor, max_transfer_size;
__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 RNDIS_MSG_INIT:
pr_debug("%s: RNDIS_MSG_INIT\n",
__func__);
tmp++; /* to get RequestID */
major = get_unaligned_le32(tmp++);
minor = get_unaligned_le32(tmp++);
max_transfer_size = get_unaligned_le32(tmp++);
params->host_rndis_major_ver = major;
params->host_rndis_minor_ver = minor;
params->dl_max_xfer_size = max_transfer_size;
pr_debug("%s(): RNDIS Host Major:%d Minor:%d version\n",
__func__, major, minor);
pr_debug("%s(): UL Max Transfer size:%x\n", __func__,
max_transfer_size);
params->state = RNDIS_INITIALIZED;
return rndis_init_response(configNr,
(rndis_init_msg_type *)buf);
case RNDIS_MSG_HALT:
pr_debug("%s: RNDIS_MSG_HALT\n",
__func__);
if (params->state == RNDIS_DATA_INITIALIZED) {
if (params->flow_ctrl_enable) {
params->flow_ctrl_enable(true);
} else {
if (params->dev) {
netif_carrier_off(params->dev);
netif_stop_queue(params->dev);
}
}
params->state = RNDIS_UNINITIALIZED;
}
return 0;
case RNDIS_MSG_QUERY:
return rndis_query_response(configNr,
(rndis_query_msg_type *)buf);
case RNDIS_MSG_SET:
return rndis_set_response(configNr,
(rndis_set_msg_type *)buf);
case RNDIS_MSG_RESET:
pr_debug("%s: RNDIS_MSG_RESET\n",
__func__);
return rndis_reset_response(configNr,
(rndis_reset_msg_type *)buf);
case RNDIS_MSG_KEEPALIVE:
/* For USB: host does this every 5 seconds */
if (rndis_debug > 1)
pr_debug("%s: RNDIS_MSG_KEEPALIVE\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);
/*
print_hex_dump_bytes(__func__, DUMP_PREFIX_OFFSET,
buf, MsgLength);
*/
break;
}
return -ENOTSUPP;
}
EXPORT_SYMBOL_GPL(rndis_msg_parser);
int rndis_register(void (*resp_avail)(void *v), void *v,
void (*flow_ctrl_enable)(bool enable))
{
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].flow_ctrl_enable =
flow_ctrl_enable;
rndis_per_dev_params[i].v = v;
rndis_per_dev_params[i].max_pkt_per_xfer = 1;
rndis_per_dev_params[i].pkt_alignment_factor = 0;
pr_debug("%s: configNr = %d\n", __func__, i);
return i;
}
}
pr_debug("failed\n");
return -ENODEV;
}
EXPORT_SYMBOL_GPL(rndis_register);
void rndis_deregister(int configNr)
{
pr_debug("%s:\n", __func__);
if (configNr >= RNDIS_MAX_CONFIGS) return;
rndis_per_dev_params[configNr].used = 0;
rndis_per_dev_params[configNr].flow_ctrl_enable = NULL;
}
EXPORT_SYMBOL_GPL(rndis_deregister);
int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
{
pr_debug("%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;
/* reset aggregation stats for every set_alt */
rndis_ul_max_xfer_size_rcvd = 0;
rndis_ul_max_pkt_per_xfer_rcvd = 0;
return 0;
}
EXPORT_SYMBOL_GPL(rndis_set_param_dev);
int rndis_set_param_vendor(u8 configNr, u32 vendorID, const char *vendorDescr)
{
pr_debug("%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;
}
EXPORT_SYMBOL_GPL(rndis_set_param_vendor);
int rndis_set_param_medium(u8 configNr, u32 medium, u32 speed)
{
pr_debug("%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;
}
EXPORT_SYMBOL_GPL(rndis_set_param_medium);
u32 rndis_get_dl_max_xfer_size(u8 configNr)
{
pr_debug("%s:\n", __func__);
return rndis_per_dev_params[configNr].dl_max_xfer_size;
}
u32 rndis_get_ul_max_xfer_size(u8 configNr)
{
pr_debug("%s:\n", __func__);
return rndis_per_dev_params[configNr].ul_max_xfer_size;
}
void rndis_set_max_pkt_xfer(u8 configNr, u8 max_pkt_per_xfer)
{
pr_debug("%s:\n", __func__);
rndis_per_dev_params[configNr].max_pkt_per_xfer = max_pkt_per_xfer;
}
void rndis_set_pkt_alignment_factor(u8 configNr, u8 pkt_alignment_factor)
{
pr_debug("%s:\n", __func__);
rndis_per_dev_params[configNr].pkt_alignment_factor =
pkt_alignment_factor;
}
/**
* rndis_flow_control: enable/disable flow control with USB RNDIS interface
* confignr - RNDIS network interface number
* enable_flow_control - true: perform flow control, false: disable flow control
*
* In BAM2BAM IPA mode, this function triggers functionality to start/stop
* endless transfers, otherwise it enables/disables RNDIS network interface.
*/
void rndis_flow_control(u8 confignr, bool enable_flow_control)
{
struct rndis_params *params;
params = &rndis_per_dev_params[confignr];
pr_debug("%s(): params->state:%x\n", __func__, params->state);
if (enable_flow_control) {
if (params->state == RNDIS_DATA_INITIALIZED) {
if (params->flow_ctrl_enable) {
params->flow_ctrl_enable(enable_flow_control);
} else {
netif_carrier_off(params->dev);
netif_stop_queue(params->dev);
}
}
params->state = RNDIS_INITIALIZED;
} else {
if (params->state != RNDIS_DATA_INITIALIZED) {
if (params->flow_ctrl_enable) {
params->flow_ctrl_enable(enable_flow_control);
} else {
netif_carrier_on(params->dev);
if (netif_running(params->dev))
netif_wake_queue(params->dev);
}
}
params->state = RNDIS_DATA_INITIALIZED;
}
}
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 = cpu_to_le32(RNDIS_MSG_PACKET);
header->MessageLength = cpu_to_le32(skb->len);
header->DataOffset = cpu_to_le32(36);
header->DataLength = cpu_to_le32(skb->len - sizeof(*header));
}
EXPORT_SYMBOL_GPL(rndis_add_hdr);
void rndis_free_response(int configNr, u8 *buf)
{
rndis_resp_t *r;
struct list_head *act, *tmp;
unsigned long flags;
spin_lock_irqsave(&rndis_per_dev_params[configNr].lock, flags);
list_for_each_safe(act, tmp,
&(rndis_per_dev_params[configNr].resp_queue))
{
if (!act)
continue;
r = list_entry(act, rndis_resp_t, list);
if (r && r->buf == buf) {
list_del(&r->list);
kfree(r);
}
}
spin_unlock_irqrestore(&rndis_per_dev_params[configNr].lock, flags);
}
EXPORT_SYMBOL_GPL(rndis_free_response);
u8 *rndis_get_next_response(int configNr, u32 *length)
{
rndis_resp_t *r;
struct list_head *act, *tmp;
unsigned long flags;
if (!length) return NULL;
spin_lock_irqsave(&rndis_per_dev_params[configNr].lock, flags);
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;
spin_unlock_irqrestore(
&rndis_per_dev_params[configNr].lock, flags);
return r->buf;
}
}
spin_unlock_irqrestore(&rndis_per_dev_params[configNr].lock, flags);
return NULL;
}
EXPORT_SYMBOL_GPL(rndis_get_next_response);
static rndis_resp_t *rndis_add_response(int configNr, u32 length)
{
rndis_resp_t *r;
unsigned long flags;
/* 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;
spin_lock_irqsave(&rndis_per_dev_params[configNr].lock, flags);
list_add_tail(&r->list,
&(rndis_per_dev_params[configNr].resp_queue));
spin_unlock_irqrestore(&rndis_per_dev_params[configNr].lock, flags);
return r;
}
int rndis_rm_hdr(struct gether *port,
struct sk_buff *skb,
struct sk_buff_head *list)
{
int num_pkts = 0;
if (skb->len > rndis_ul_max_xfer_size_rcvd)
rndis_ul_max_xfer_size_rcvd = skb->len;
while (skb->len) {
struct rndis_packet_msg_type *hdr;
struct sk_buff *skb2;
u32 msg_len, data_offset, data_len;
if (skb->len < sizeof *hdr) {
pr_err("invalid rndis pkt: skblen:%u hdr_len:%zu",
skb->len, sizeof *hdr);
dev_kfree_skb_any(skb);
return -EINVAL;
}
hdr = (void *)skb->data;
msg_len = le32_to_cpu(hdr->MessageLength);
data_offset = le32_to_cpu(hdr->DataOffset);
data_len = le32_to_cpu(hdr->DataLength);
if (skb->len < msg_len ||
((data_offset + data_len + 8) > msg_len)) {
pr_err("invalid rndis message: %d/%d/%d/%d, len:%d\n",
le32_to_cpu(hdr->MessageType),
msg_len, data_offset, data_len, skb->len);
dev_kfree_skb_any(skb);
return -EOVERFLOW;
}
if (le32_to_cpu(hdr->MessageType) != RNDIS_MSG_PACKET) {
pr_err("invalid rndis message: %d/%d/%d/%d, len:%d\n",
le32_to_cpu(hdr->MessageType),
msg_len, data_offset, data_len, skb->len);
dev_kfree_skb_any(skb);
return -EINVAL;
}
num_pkts++;
skb_pull(skb, data_offset + 8);
if (data_len == skb->len ||
data_len == (skb->len - 1)) {
skb_trim(skb, data_len);
break;
}
skb2 = skb_clone(skb, GFP_ATOMIC);
if (!skb2) {
pr_err("%s:skb clone failed\n", __func__);
dev_kfree_skb_any(skb);
return -ENOMEM;
}
skb_pull(skb, msg_len - sizeof *hdr);
skb_trim(skb2, data_len);
skb_queue_tail(list, skb2);
}
if (num_pkts > rndis_ul_max_pkt_per_xfer_rcvd)
rndis_ul_max_pkt_per_xfer_rcvd = num_pkts;
skb_queue_tail(list, skb);
return 0;
}
EXPORT_SYMBOL_GPL(rndis_rm_hdr);
#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"
"ul-max-xfer-size:%zu max-xfer-size-rcvd: %d\n"
"ul-max-pkts-per-xfer:%d max-pkts-per-xfer-rcvd:%d\n"
"pkt_alignment_factor:%d\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,
param->max_pkt_per_xfer *
(param->dev->mtu + sizeof(struct ethhdr) +
sizeof(struct rndis_packet_msg_type) + 22),
rndis_ul_max_xfer_size_rcvd,
param->max_pkt_per_xfer,
rndis_ul_max_pkt_per_xfer_rcvd,
param->pkt_alignment_factor);
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_DATA(file_inode(file));
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 pr_debug("%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_DATA(inode));
}
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 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);
rndis_connect_state[i] = proc_create_data(name, 0660, NULL,
&rndis_proc_fops,
(void *)(rndis_per_dev_params + i));
if (!rndis_connect_state[i]) {
pr_debug("%s: remove entries", __func__);
while (i) {
sprintf(name, NAME_TEMPLATE, --i);
remove_proc_entry(name, NULL);
}
pr_debug("\n");
return -EIO;
}
#endif
spin_lock_init(&(rndis_per_dev_params[i].lock));
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].pkt_alignment_factor = 0;
rndis_per_dev_params[i].media_state
= RNDIS_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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