v4.19.13 snapshot.
diff --git a/drivers/usb/gadget/function/rndis.c b/drivers/usb/gadget/function/rndis.c
new file mode 100644
index 0000000..04c142c
--- /dev/null
+++ b/drivers/usb/gadget/function/rndis.c
@@ -0,0 +1,1178 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * RNDIS MSG parser
+ *
+ * Authors: Benedikt Spranger, Pengutronix
+ * Robert Schwebel, Pengutronix
+ *
+ * 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/idr.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"
+
+#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
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+
+#define NAME_TEMPLATE "driver/rndis-%03d"
+
+#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
+
+static DEFINE_IDA(rndis_ida);
+
+/* Driver Version */
+static const __le32 rndis_driver_version = cpu_to_le32(1);
+
+/* Function Prototypes */
+static rndis_resp_t *rndis_add_response(struct rndis_params *params,
+ u32 length);
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+
+static const struct file_operations rndis_proc_fops;
+
+#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
+
+/* 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(struct rndis_params *params, 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 = params->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(params->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(params->medium);
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE:
+ pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
+ if (params->dev) {
+ *outbuf = cpu_to_le32(params->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 (params->media_state == RNDIS_MEDIA_STATE_DISCONNECTED)
+ *outbuf = cpu_to_le32(0);
+ else
+ *outbuf = cpu_to_le32(params->speed);
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE:
+ pr_debug("%s: RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
+ if (params->dev) {
+ *outbuf = cpu_to_le32(params->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 (params->dev) {
+ *outbuf = cpu_to_le32(params->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(params->vendorID);
+ retval = 0;
+ break;
+
+ /* mandatory */
+ case RNDIS_OID_GEN_VENDOR_DESCRIPTION:
+ pr_debug("%s: RNDIS_OID_GEN_VENDOR_DESCRIPTION\n", __func__);
+ if (params->vendorDescr) {
+ length = strlen(params->vendorDescr);
+ memcpy(outbuf, params->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(*params->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(params->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 (params->dev) {
+ length = ETH_ALEN;
+ memcpy(outbuf, params->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 (params->dev) {
+ length = ETH_ALEN;
+ memcpy(outbuf, params->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_warn("%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(struct rndis_params *params, u32 OID,
+ u8 *buf, u32 buf_len, rndis_resp_t *r)
+{
+ rndis_set_cmplt_type *resp;
+ int i, retval = -ENOTSUPP;
+
+ 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]));
+ }
+ }
+
+ 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) {
+ 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_fops, 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 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"
+
+#endif /* CONFIG_USB_GADGET_DEBUG_FILES */