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1177 lines
28 KiB
1177 lines
28 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* RNDIS MSG parser |
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* |
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* Authors: Benedikt Spranger, Pengutronix |
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* Robert Schwebel, Pengutronix |
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* |
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* This software was originally developed in conformance with |
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* Microsoft's Remote NDIS Specification License Agreement. |
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* |
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* 03/12/2004 Kai-Uwe Bloem <[email protected]> |
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* Fixed message length bug in init_response |
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* |
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* 03/25/2004 Kai-Uwe Bloem <[email protected]> |
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* Fixed rndis_rm_hdr length bug. |
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* |
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* Copyright (C) 2004 by David Brownell |
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* updates to merge with Linux 2.6, better match RNDIS spec |
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*/ |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/kernel.h> |
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#include <linux/errno.h> |
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#include <linux/idr.h> |
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#include <linux/list.h> |
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#include <linux/proc_fs.h> |
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#include <linux/slab.h> |
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#include <linux/seq_file.h> |
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#include <linux/netdevice.h> |
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#include <asm/io.h> |
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#include <asm/byteorder.h> |
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#include <asm/unaligned.h> |
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#include "u_rndis.h" |
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#undef VERBOSE_DEBUG |
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#include "rndis.h" |
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/* The driver for your USB chip needs to support ep0 OUT to work with |
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* RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional). |
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* |
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* Windows hosts need an INF file like Documentation/usb/linux.inf |
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* and will be happier if you provide the host_addr module parameter. |
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*/ |
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#if 0 |
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static int rndis_debug = 0; |
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module_param (rndis_debug, int, 0); |
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MODULE_PARM_DESC (rndis_debug, "enable debugging"); |
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#else |
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#define rndis_debug 0 |
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#endif |
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#ifdef CONFIG_USB_GADGET_DEBUG_FILES |
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#define NAME_TEMPLATE "driver/rndis-%03d" |
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#endif /* CONFIG_USB_GADGET_DEBUG_FILES */ |
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static DEFINE_IDA(rndis_ida); |
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/* Driver Version */ |
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static const __le32 rndis_driver_version = cpu_to_le32(1); |
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/* Function Prototypes */ |
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static rndis_resp_t *rndis_add_response(struct rndis_params *params, |
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u32 length); |
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#ifdef CONFIG_USB_GADGET_DEBUG_FILES |
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static const struct proc_ops rndis_proc_ops; |
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#endif /* CONFIG_USB_GADGET_DEBUG_FILES */ |
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/* supported OIDs */ |
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static const u32 oid_supported_list[] = { |
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/* the general stuff */ |
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RNDIS_OID_GEN_SUPPORTED_LIST, |
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RNDIS_OID_GEN_HARDWARE_STATUS, |
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RNDIS_OID_GEN_MEDIA_SUPPORTED, |
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RNDIS_OID_GEN_MEDIA_IN_USE, |
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RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE, |
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RNDIS_OID_GEN_LINK_SPEED, |
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RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE, |
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RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE, |
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RNDIS_OID_GEN_VENDOR_ID, |
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RNDIS_OID_GEN_VENDOR_DESCRIPTION, |
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RNDIS_OID_GEN_VENDOR_DRIVER_VERSION, |
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RNDIS_OID_GEN_CURRENT_PACKET_FILTER, |
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RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE, |
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RNDIS_OID_GEN_MEDIA_CONNECT_STATUS, |
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RNDIS_OID_GEN_PHYSICAL_MEDIUM, |
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/* the statistical stuff */ |
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RNDIS_OID_GEN_XMIT_OK, |
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RNDIS_OID_GEN_RCV_OK, |
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RNDIS_OID_GEN_XMIT_ERROR, |
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RNDIS_OID_GEN_RCV_ERROR, |
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RNDIS_OID_GEN_RCV_NO_BUFFER, |
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#ifdef RNDIS_OPTIONAL_STATS |
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RNDIS_OID_GEN_DIRECTED_BYTES_XMIT, |
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RNDIS_OID_GEN_DIRECTED_FRAMES_XMIT, |
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RNDIS_OID_GEN_MULTICAST_BYTES_XMIT, |
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RNDIS_OID_GEN_MULTICAST_FRAMES_XMIT, |
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RNDIS_OID_GEN_BROADCAST_BYTES_XMIT, |
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RNDIS_OID_GEN_BROADCAST_FRAMES_XMIT, |
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RNDIS_OID_GEN_DIRECTED_BYTES_RCV, |
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RNDIS_OID_GEN_DIRECTED_FRAMES_RCV, |
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RNDIS_OID_GEN_MULTICAST_BYTES_RCV, |
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RNDIS_OID_GEN_MULTICAST_FRAMES_RCV, |
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RNDIS_OID_GEN_BROADCAST_BYTES_RCV, |
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RNDIS_OID_GEN_BROADCAST_FRAMES_RCV, |
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RNDIS_OID_GEN_RCV_CRC_ERROR, |
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RNDIS_OID_GEN_TRANSMIT_QUEUE_LENGTH, |
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#endif /* RNDIS_OPTIONAL_STATS */ |
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/* mandatory 802.3 */ |
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/* the general stuff */ |
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RNDIS_OID_802_3_PERMANENT_ADDRESS, |
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RNDIS_OID_802_3_CURRENT_ADDRESS, |
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RNDIS_OID_802_3_MULTICAST_LIST, |
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RNDIS_OID_802_3_MAC_OPTIONS, |
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RNDIS_OID_802_3_MAXIMUM_LIST_SIZE, |
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/* the statistical stuff */ |
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RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT, |
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RNDIS_OID_802_3_XMIT_ONE_COLLISION, |
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RNDIS_OID_802_3_XMIT_MORE_COLLISIONS, |
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#ifdef RNDIS_OPTIONAL_STATS |
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RNDIS_OID_802_3_XMIT_DEFERRED, |
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RNDIS_OID_802_3_XMIT_MAX_COLLISIONS, |
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RNDIS_OID_802_3_RCV_OVERRUN, |
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RNDIS_OID_802_3_XMIT_UNDERRUN, |
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RNDIS_OID_802_3_XMIT_HEARTBEAT_FAILURE, |
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RNDIS_OID_802_3_XMIT_TIMES_CRS_LOST, |
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RNDIS_OID_802_3_XMIT_LATE_COLLISIONS, |
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#endif /* RNDIS_OPTIONAL_STATS */ |
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#ifdef RNDIS_PM |
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/* PM and wakeup are "mandatory" for USB, but the RNDIS specs |
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* don't say what they mean ... and the NDIS specs are often |
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* confusing and/or ambiguous in this context. (That is, more |
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* so than their specs for the other OIDs.) |
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* |
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* FIXME someone who knows what these should do, please |
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* implement them! |
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*/ |
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/* power management */ |
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OID_PNP_CAPABILITIES, |
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OID_PNP_QUERY_POWER, |
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OID_PNP_SET_POWER, |
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#ifdef RNDIS_WAKEUP |
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/* wake up host */ |
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OID_PNP_ENABLE_WAKE_UP, |
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OID_PNP_ADD_WAKE_UP_PATTERN, |
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OID_PNP_REMOVE_WAKE_UP_PATTERN, |
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#endif /* RNDIS_WAKEUP */ |
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#endif /* RNDIS_PM */ |
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}; |
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/* NDIS Functions */ |
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static int gen_ndis_query_resp(struct rndis_params *params, u32 OID, u8 *buf, |
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unsigned buf_len, rndis_resp_t *r) |
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{ |
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int retval = -ENOTSUPP; |
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u32 length = 4; /* usually */ |
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__le32 *outbuf; |
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int i, count; |
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rndis_query_cmplt_type *resp; |
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struct net_device *net; |
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struct rtnl_link_stats64 temp; |
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const struct rtnl_link_stats64 *stats; |
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if (!r) return -ENOMEM; |
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resp = (rndis_query_cmplt_type *)r->buf; |
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if (!resp) return -ENOMEM; |
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if (buf_len && rndis_debug > 1) { |
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pr_debug("query OID %08x value, len %d:\n", OID, buf_len); |
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for (i = 0; i < buf_len; i += 16) { |
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pr_debug("%03d: %08x %08x %08x %08x\n", i, |
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get_unaligned_le32(&buf[i]), |
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get_unaligned_le32(&buf[i + 4]), |
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get_unaligned_le32(&buf[i + 8]), |
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get_unaligned_le32(&buf[i + 12])); |
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} |
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} |
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/* response goes here, right after the header */ |
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outbuf = (__le32 *)&resp[1]; |
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resp->InformationBufferOffset = cpu_to_le32(16); |
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net = params->dev; |
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stats = dev_get_stats(net, &temp); |
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switch (OID) { |
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/* general oids (table 4-1) */ |
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/* mandatory */ |
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case RNDIS_OID_GEN_SUPPORTED_LIST: |
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pr_debug("%s: RNDIS_OID_GEN_SUPPORTED_LIST\n", __func__); |
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length = sizeof(oid_supported_list); |
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count = length / sizeof(u32); |
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for (i = 0; i < count; i++) |
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outbuf[i] = cpu_to_le32(oid_supported_list[i]); |
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retval = 0; |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_HARDWARE_STATUS: |
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pr_debug("%s: RNDIS_OID_GEN_HARDWARE_STATUS\n", __func__); |
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/* Bogus question! |
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* Hardware must be ready to receive high level protocols. |
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* BTW: |
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* reddite ergo quae sunt Caesaris Caesari |
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* et quae sunt Dei Deo! |
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*/ |
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*outbuf = cpu_to_le32(0); |
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retval = 0; |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_MEDIA_SUPPORTED: |
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pr_debug("%s: RNDIS_OID_GEN_MEDIA_SUPPORTED\n", __func__); |
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*outbuf = cpu_to_le32(params->medium); |
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retval = 0; |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_MEDIA_IN_USE: |
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pr_debug("%s: RNDIS_OID_GEN_MEDIA_IN_USE\n", __func__); |
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/* one medium, one transport... (maybe you do it better) */ |
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*outbuf = cpu_to_le32(params->medium); |
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retval = 0; |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE: |
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pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__); |
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if (params->dev) { |
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*outbuf = cpu_to_le32(params->dev->mtu); |
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retval = 0; |
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} |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_LINK_SPEED: |
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if (rndis_debug > 1) |
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pr_debug("%s: RNDIS_OID_GEN_LINK_SPEED\n", __func__); |
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if (params->media_state == RNDIS_MEDIA_STATE_DISCONNECTED) |
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*outbuf = cpu_to_le32(0); |
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else |
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*outbuf = cpu_to_le32(params->speed); |
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retval = 0; |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE: |
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pr_debug("%s: RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__); |
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if (params->dev) { |
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*outbuf = cpu_to_le32(params->dev->mtu); |
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retval = 0; |
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} |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE: |
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pr_debug("%s: RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__); |
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if (params->dev) { |
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*outbuf = cpu_to_le32(params->dev->mtu); |
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retval = 0; |
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} |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_VENDOR_ID: |
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pr_debug("%s: RNDIS_OID_GEN_VENDOR_ID\n", __func__); |
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*outbuf = cpu_to_le32(params->vendorID); |
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retval = 0; |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_VENDOR_DESCRIPTION: |
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pr_debug("%s: RNDIS_OID_GEN_VENDOR_DESCRIPTION\n", __func__); |
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if (params->vendorDescr) { |
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length = strlen(params->vendorDescr); |
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memcpy(outbuf, params->vendorDescr, length); |
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} else { |
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outbuf[0] = 0; |
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} |
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retval = 0; |
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break; |
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case RNDIS_OID_GEN_VENDOR_DRIVER_VERSION: |
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pr_debug("%s: RNDIS_OID_GEN_VENDOR_DRIVER_VERSION\n", __func__); |
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/* Created as LE */ |
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*outbuf = rndis_driver_version; |
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retval = 0; |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_CURRENT_PACKET_FILTER: |
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pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER\n", __func__); |
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*outbuf = cpu_to_le32(*params->filter); |
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retval = 0; |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE: |
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pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__); |
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*outbuf = cpu_to_le32(RNDIS_MAX_TOTAL_SIZE); |
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retval = 0; |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_MEDIA_CONNECT_STATUS: |
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if (rndis_debug > 1) |
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pr_debug("%s: RNDIS_OID_GEN_MEDIA_CONNECT_STATUS\n", __func__); |
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*outbuf = cpu_to_le32(params->media_state); |
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retval = 0; |
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break; |
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case RNDIS_OID_GEN_PHYSICAL_MEDIUM: |
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pr_debug("%s: RNDIS_OID_GEN_PHYSICAL_MEDIUM\n", __func__); |
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*outbuf = cpu_to_le32(0); |
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retval = 0; |
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break; |
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/* The RNDIS specification is incomplete/wrong. Some versions |
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* of MS-Windows expect OIDs that aren't specified there. Other |
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* versions emit undefined RNDIS messages. DOCUMENT ALL THESE! |
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*/ |
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case RNDIS_OID_GEN_MAC_OPTIONS: /* from WinME */ |
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pr_debug("%s: RNDIS_OID_GEN_MAC_OPTIONS\n", __func__); |
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*outbuf = cpu_to_le32( |
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RNDIS_MAC_OPTION_RECEIVE_SERIALIZED |
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| RNDIS_MAC_OPTION_FULL_DUPLEX); |
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retval = 0; |
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break; |
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/* statistics OIDs (table 4-2) */ |
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/* mandatory */ |
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case RNDIS_OID_GEN_XMIT_OK: |
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if (rndis_debug > 1) |
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pr_debug("%s: RNDIS_OID_GEN_XMIT_OK\n", __func__); |
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if (stats) { |
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*outbuf = cpu_to_le32(stats->tx_packets |
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- stats->tx_errors - stats->tx_dropped); |
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retval = 0; |
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} |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_RCV_OK: |
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if (rndis_debug > 1) |
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pr_debug("%s: RNDIS_OID_GEN_RCV_OK\n", __func__); |
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if (stats) { |
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*outbuf = cpu_to_le32(stats->rx_packets |
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- stats->rx_errors - stats->rx_dropped); |
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retval = 0; |
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} |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_XMIT_ERROR: |
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if (rndis_debug > 1) |
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pr_debug("%s: RNDIS_OID_GEN_XMIT_ERROR\n", __func__); |
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if (stats) { |
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*outbuf = cpu_to_le32(stats->tx_errors); |
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retval = 0; |
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} |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_RCV_ERROR: |
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if (rndis_debug > 1) |
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pr_debug("%s: RNDIS_OID_GEN_RCV_ERROR\n", __func__); |
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if (stats) { |
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*outbuf = cpu_to_le32(stats->rx_errors); |
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retval = 0; |
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} |
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break; |
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/* mandatory */ |
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case RNDIS_OID_GEN_RCV_NO_BUFFER: |
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pr_debug("%s: RNDIS_OID_GEN_RCV_NO_BUFFER\n", __func__); |
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if (stats) { |
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*outbuf = cpu_to_le32(stats->rx_dropped); |
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retval = 0; |
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} |
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break; |
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/* ieee802.3 OIDs (table 4-3) */ |
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/* mandatory */ |
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case RNDIS_OID_802_3_PERMANENT_ADDRESS: |
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pr_debug("%s: RNDIS_OID_802_3_PERMANENT_ADDRESS\n", __func__); |
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if (params->dev) { |
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length = ETH_ALEN; |
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memcpy(outbuf, params->host_mac, length); |
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retval = 0; |
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} |
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break; |
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/* mandatory */ |
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case RNDIS_OID_802_3_CURRENT_ADDRESS: |
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pr_debug("%s: RNDIS_OID_802_3_CURRENT_ADDRESS\n", __func__); |
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if (params->dev) { |
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length = ETH_ALEN; |
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memcpy(outbuf, params->host_mac, length); |
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retval = 0; |
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} |
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break; |
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/* mandatory */ |
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case RNDIS_OID_802_3_MULTICAST_LIST: |
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pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__); |
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/* Multicast base address only */ |
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*outbuf = cpu_to_le32(0xE0000000); |
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retval = 0; |
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break; |
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|
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/* mandatory */ |
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case RNDIS_OID_802_3_MAXIMUM_LIST_SIZE: |
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pr_debug("%s: RNDIS_OID_802_3_MAXIMUM_LIST_SIZE\n", __func__); |
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/* Multicast base address only */ |
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*outbuf = cpu_to_le32(1); |
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retval = 0; |
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break; |
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case RNDIS_OID_802_3_MAC_OPTIONS: |
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pr_debug("%s: RNDIS_OID_802_3_MAC_OPTIONS\n", __func__); |
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*outbuf = cpu_to_le32(0); |
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retval = 0; |
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break; |
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|
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/* ieee802.3 statistics OIDs (table 4-4) */ |
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|
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/* mandatory */ |
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case RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT: |
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pr_debug("%s: RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__); |
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if (stats) { |
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*outbuf = cpu_to_le32(stats->rx_frame_errors); |
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retval = 0; |
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} |
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break; |
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|
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/* mandatory */ |
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case RNDIS_OID_802_3_XMIT_ONE_COLLISION: |
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pr_debug("%s: RNDIS_OID_802_3_XMIT_ONE_COLLISION\n", __func__); |
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*outbuf = cpu_to_le32(0); |
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retval = 0; |
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break; |
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|
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/* mandatory */ |
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case RNDIS_OID_802_3_XMIT_MORE_COLLISIONS: |
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pr_debug("%s: RNDIS_OID_802_3_XMIT_MORE_COLLISIONS\n", __func__); |
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*outbuf = cpu_to_le32(0); |
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retval = 0; |
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break; |
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|
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default: |
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pr_warn("%s: query unknown OID 0x%08X\n", __func__, OID); |
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} |
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if (retval < 0) |
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length = 0; |
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|
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resp->InformationBufferLength = cpu_to_le32(length); |
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r->length = length + sizeof(*resp); |
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resp->MessageLength = cpu_to_le32(r->length); |
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return retval; |
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} |
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|
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static int gen_ndis_set_resp(struct rndis_params *params, u32 OID, |
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u8 *buf, u32 buf_len, rndis_resp_t *r) |
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{ |
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rndis_set_cmplt_type *resp; |
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int i, retval = -ENOTSUPP; |
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|
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if (!r) |
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return -ENOMEM; |
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resp = (rndis_set_cmplt_type *)r->buf; |
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if (!resp) |
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return -ENOMEM; |
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|
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if (buf_len && rndis_debug > 1) { |
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pr_debug("set OID %08x value, len %d:\n", OID, buf_len); |
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for (i = 0; i < buf_len; i += 16) { |
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pr_debug("%03d: %08x %08x %08x %08x\n", i, |
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get_unaligned_le32(&buf[i]), |
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get_unaligned_le32(&buf[i + 4]), |
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get_unaligned_le32(&buf[i + 8]), |
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get_unaligned_le32(&buf[i + 12])); |
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} |
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} |
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|
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switch (OID) { |
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case RNDIS_OID_GEN_CURRENT_PACKET_FILTER: |
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|
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/* these NDIS_PACKET_TYPE_* bitflags are shared with |
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* cdc_filter; it's not RNDIS-specific |
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* NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in: |
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* PROMISCUOUS, DIRECTED, |
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* MULTICAST, ALL_MULTICAST, BROADCAST |
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*/ |
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*params->filter = (u16)get_unaligned_le32(buf); |
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pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER %08x\n", |
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__func__, *params->filter); |
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|
|
/* 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 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_warn("%s: set unknown OID 0x%08X, size %d\n", |
|
__func__, OID, buf_len); |
|
} |
|
|
|
return retval; |
|
} |
|
|
|
/* |
|
* Response Functions |
|
*/ |
|
|
|
static int rndis_init_response(struct rndis_params *params, |
|
rndis_init_msg_type *buf) |
|
{ |
|
rndis_init_cmplt_type *resp; |
|
rndis_resp_t *r; |
|
|
|
if (!params->dev) |
|
return -ENOTSUPP; |
|
|
|
r = rndis_add_response(params, 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(1); |
|
resp->MaxTransferSize = cpu_to_le32( |
|
params->dev->mtu |
|
+ sizeof(struct ethhdr) |
|
+ sizeof(struct rndis_packet_msg_type) |
|
+ 22); |
|
resp->PacketAlignmentFactor = cpu_to_le32(0); |
|
resp->AFListOffset = cpu_to_le32(0); |
|
resp->AFListSize = cpu_to_le32(0); |
|
|
|
params->resp_avail(params->v); |
|
return 0; |
|
} |
|
|
|
static int rndis_query_response(struct rndis_params *params, |
|
rndis_query_msg_type *buf) |
|
{ |
|
rndis_query_cmplt_type *resp; |
|
rndis_resp_t *r; |
|
|
|
/* 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(params, |
|
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(params, 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(struct rndis_params *params, |
|
rndis_set_msg_type *buf) |
|
{ |
|
u32 BufLength, BufOffset; |
|
rndis_set_cmplt_type *resp; |
|
rndis_resp_t *r; |
|
|
|
r = rndis_add_response(params, 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(params, 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(struct rndis_params *params, |
|
rndis_reset_msg_type *buf) |
|
{ |
|
rndis_reset_cmplt_type *resp; |
|
rndis_resp_t *r; |
|
u8 *xbuf; |
|
u32 length; |
|
|
|
/* drain the response queue */ |
|
while ((xbuf = rndis_get_next_response(params, &length))) |
|
rndis_free_response(params, xbuf); |
|
|
|
r = rndis_add_response(params, 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(struct rndis_params *params, |
|
rndis_keepalive_msg_type *buf) |
|
{ |
|
rndis_keepalive_cmplt_type *resp; |
|
rndis_resp_t *r; |
|
|
|
/* host "should" check only in RNDIS_DATA_INITIALIZED state */ |
|
|
|
r = rndis_add_response(params, 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(struct rndis_params *params, u32 status) |
|
{ |
|
rndis_indicate_status_msg_type *resp; |
|
rndis_resp_t *r; |
|
|
|
if (params->state == RNDIS_UNINITIALIZED) |
|
return -ENOTSUPP; |
|
|
|
r = rndis_add_response(params, 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(struct rndis_params *params) |
|
{ |
|
params->media_state = RNDIS_MEDIA_STATE_CONNECTED; |
|
return rndis_indicate_status_msg(params, RNDIS_STATUS_MEDIA_CONNECT); |
|
} |
|
EXPORT_SYMBOL_GPL(rndis_signal_connect); |
|
|
|
int rndis_signal_disconnect(struct rndis_params *params) |
|
{ |
|
params->media_state = RNDIS_MEDIA_STATE_DISCONNECTED; |
|
return rndis_indicate_status_msg(params, RNDIS_STATUS_MEDIA_DISCONNECT); |
|
} |
|
EXPORT_SYMBOL_GPL(rndis_signal_disconnect); |
|
|
|
void rndis_uninit(struct rndis_params *params) |
|
{ |
|
u8 *buf; |
|
u32 length; |
|
|
|
if (!params) |
|
return; |
|
params->state = RNDIS_UNINITIALIZED; |
|
|
|
/* drain the response queue */ |
|
while ((buf = rndis_get_next_response(params, &length))) |
|
rndis_free_response(params, buf); |
|
} |
|
EXPORT_SYMBOL_GPL(rndis_uninit); |
|
|
|
void rndis_set_host_mac(struct rndis_params *params, const u8 *addr) |
|
{ |
|
params->host_mac = addr; |
|
} |
|
EXPORT_SYMBOL_GPL(rndis_set_host_mac); |
|
|
|
/* |
|
* Message Parser |
|
*/ |
|
int rndis_msg_parser(struct rndis_params *params, u8 *buf) |
|
{ |
|
u32 MsgType, MsgLength; |
|
__le32 *tmp; |
|
|
|
if (!buf) |
|
return -ENOMEM; |
|
|
|
tmp = (__le32 *)buf; |
|
MsgType = get_unaligned_le32(tmp++); |
|
MsgLength = get_unaligned_le32(tmp++); |
|
|
|
if (!params) |
|
return -ENOTSUPP; |
|
|
|
/* 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__); |
|
params->state = RNDIS_INITIALIZED; |
|
return rndis_init_response(params, (rndis_init_msg_type *)buf); |
|
|
|
case RNDIS_MSG_HALT: |
|
pr_debug("%s: RNDIS_MSG_HALT\n", |
|
__func__); |
|
params->state = RNDIS_UNINITIALIZED; |
|
if (params->dev) { |
|
netif_carrier_off(params->dev); |
|
netif_stop_queue(params->dev); |
|
} |
|
return 0; |
|
|
|
case RNDIS_MSG_QUERY: |
|
return rndis_query_response(params, |
|
(rndis_query_msg_type *)buf); |
|
|
|
case RNDIS_MSG_SET: |
|
return rndis_set_response(params, (rndis_set_msg_type *)buf); |
|
|
|
case RNDIS_MSG_RESET: |
|
pr_debug("%s: RNDIS_MSG_RESET\n", |
|
__func__); |
|
return rndis_reset_response(params, |
|
(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(params, |
|
(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_warn("%s: unknown RNDIS message 0x%08X len %d\n", |
|
__func__, MsgType, MsgLength); |
|
/* Garbled message can be huge, so limit what we display */ |
|
if (MsgLength > 16) |
|
MsgLength = 16; |
|
print_hex_dump_bytes(__func__, DUMP_PREFIX_OFFSET, |
|
buf, MsgLength); |
|
break; |
|
} |
|
|
|
return -ENOTSUPP; |
|
} |
|
EXPORT_SYMBOL_GPL(rndis_msg_parser); |
|
|
|
static inline int rndis_get_nr(void) |
|
{ |
|
return ida_simple_get(&rndis_ida, 0, 0, GFP_KERNEL); |
|
} |
|
|
|
static inline void rndis_put_nr(int nr) |
|
{ |
|
ida_simple_remove(&rndis_ida, nr); |
|
} |
|
|
|
struct rndis_params *rndis_register(void (*resp_avail)(void *v), void *v) |
|
{ |
|
struct rndis_params *params; |
|
int i; |
|
|
|
if (!resp_avail) |
|
return ERR_PTR(-EINVAL); |
|
|
|
i = rndis_get_nr(); |
|
if (i < 0) { |
|
pr_debug("failed\n"); |
|
|
|
return ERR_PTR(-ENODEV); |
|
} |
|
|
|
params = kzalloc(sizeof(*params), GFP_KERNEL); |
|
if (!params) { |
|
rndis_put_nr(i); |
|
|
|
return ERR_PTR(-ENOMEM); |
|
} |
|
|
|
#ifdef CONFIG_USB_GADGET_DEBUG_FILES |
|
{ |
|
struct proc_dir_entry *proc_entry; |
|
char name[20]; |
|
|
|
sprintf(name, NAME_TEMPLATE, i); |
|
proc_entry = proc_create_data(name, 0660, NULL, |
|
&rndis_proc_ops, params); |
|
if (!proc_entry) { |
|
kfree(params); |
|
rndis_put_nr(i); |
|
|
|
return ERR_PTR(-EIO); |
|
} |
|
} |
|
#endif |
|
|
|
params->confignr = i; |
|
params->used = 1; |
|
params->state = RNDIS_UNINITIALIZED; |
|
params->media_state = RNDIS_MEDIA_STATE_DISCONNECTED; |
|
params->resp_avail = resp_avail; |
|
params->v = v; |
|
INIT_LIST_HEAD(¶ms->resp_queue); |
|
pr_debug("%s: configNr = %d\n", __func__, i); |
|
|
|
return params; |
|
} |
|
EXPORT_SYMBOL_GPL(rndis_register); |
|
|
|
void rndis_deregister(struct rndis_params *params) |
|
{ |
|
int i; |
|
|
|
pr_debug("%s:\n", __func__); |
|
|
|
if (!params) |
|
return; |
|
|
|
i = params->confignr; |
|
|
|
#ifdef CONFIG_USB_GADGET_DEBUG_FILES |
|
{ |
|
char name[20]; |
|
|
|
sprintf(name, NAME_TEMPLATE, i); |
|
remove_proc_entry(name, NULL); |
|
} |
|
#endif |
|
|
|
kfree(params); |
|
rndis_put_nr(i); |
|
} |
|
EXPORT_SYMBOL_GPL(rndis_deregister); |
|
int rndis_set_param_dev(struct rndis_params *params, struct net_device *dev, |
|
u16 *cdc_filter) |
|
{ |
|
pr_debug("%s:\n", __func__); |
|
if (!dev) |
|
return -EINVAL; |
|
if (!params) |
|
return -1; |
|
|
|
params->dev = dev; |
|
params->filter = cdc_filter; |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(rndis_set_param_dev); |
|
|
|
int rndis_set_param_vendor(struct rndis_params *params, u32 vendorID, |
|
const char *vendorDescr) |
|
{ |
|
pr_debug("%s:\n", __func__); |
|
if (!vendorDescr) return -1; |
|
if (!params) |
|
return -1; |
|
|
|
params->vendorID = vendorID; |
|
params->vendorDescr = vendorDescr; |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(rndis_set_param_vendor); |
|
|
|
int rndis_set_param_medium(struct rndis_params *params, u32 medium, u32 speed) |
|
{ |
|
pr_debug("%s: %u %u\n", __func__, medium, speed); |
|
if (!params) |
|
return -1; |
|
|
|
params->medium = medium; |
|
params->speed = speed; |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(rndis_set_param_medium); |
|
|
|
void rndis_add_hdr(struct sk_buff *skb) |
|
{ |
|
struct rndis_packet_msg_type *header; |
|
|
|
if (!skb) |
|
return; |
|
header = 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(struct rndis_params *params, u8 *buf) |
|
{ |
|
rndis_resp_t *r, *n; |
|
|
|
list_for_each_entry_safe(r, n, ¶ms->resp_queue, list) { |
|
if (r->buf == buf) { |
|
list_del(&r->list); |
|
kfree(r); |
|
} |
|
} |
|
} |
|
EXPORT_SYMBOL_GPL(rndis_free_response); |
|
|
|
u8 *rndis_get_next_response(struct rndis_params *params, u32 *length) |
|
{ |
|
rndis_resp_t *r, *n; |
|
|
|
if (!length) return NULL; |
|
|
|
list_for_each_entry_safe(r, n, ¶ms->resp_queue, list) { |
|
if (!r->send) { |
|
r->send = 1; |
|
*length = r->length; |
|
return r->buf; |
|
} |
|
} |
|
|
|
return NULL; |
|
} |
|
EXPORT_SYMBOL_GPL(rndis_get_next_response); |
|
|
|
static rndis_resp_t *rndis_add_response(struct rndis_params *params, 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, ¶ms->resp_queue); |
|
return r; |
|
} |
|
|
|
int rndis_rm_hdr(struct gether *port, |
|
struct sk_buff *skb, |
|
struct sk_buff_head *list) |
|
{ |
|
/* tmp points to a struct rndis_packet_msg_type */ |
|
__le32 *tmp = (void *)skb->data; |
|
|
|
/* MessageType, MessageLength */ |
|
if (cpu_to_le32(RNDIS_MSG_PACKET) |
|
!= get_unaligned(tmp++)) { |
|
dev_kfree_skb_any(skb); |
|
return -EINVAL; |
|
} |
|
tmp++; |
|
|
|
/* DataOffset, DataLength */ |
|
if (!skb_pull(skb, get_unaligned_le32(tmp++) + 8)) { |
|
dev_kfree_skb_any(skb); |
|
return -EOVERFLOW; |
|
} |
|
skb_trim(skb, get_unaligned_le32(tmp++)); |
|
|
|
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", |
|
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_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); |
|
break; |
|
case 'D': |
|
case 'd': |
|
rndis_signal_disconnect(p); |
|
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 proc_ops rndis_proc_ops = { |
|
.proc_open = rndis_proc_open, |
|
.proc_read = seq_read, |
|
.proc_lseek = seq_lseek, |
|
.proc_release = single_release, |
|
.proc_write = rndis_proc_write, |
|
}; |
|
|
|
#define NAME_TEMPLATE "driver/rndis-%03d" |
|
|
|
#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
|
|
|