diff options
Diffstat (limited to 'drivers/usb/gadget/function/rndis.c')
| -rw-r--r-- | drivers/usb/gadget/function/rndis.c | 1190 |
1 files changed, 1190 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/rndis.c b/drivers/usb/gadget/function/rndis.c new file mode 100644 index 0000000..95d2324 --- /dev/null +++ b/drivers/usb/gadget/function/rndis.c @@ -0,0 +1,1190 @@ +/* + * 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" + +#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 + + +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) { + 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_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(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(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; + + 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; + __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__); + 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__); + 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(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) +{ + u8 i; + + if (!resp_avail) + return -EINVAL; + + for (i = 0; i < RNDIS_MAX_CONFIGS; i++) { + if (!rndis_per_dev_params[i].used) { + rndis_per_dev_params[i].used = 1; + rndis_per_dev_params[i].resp_avail = resp_avail; + rndis_per_dev_params[i].v = v; + 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; +} +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; + + 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); + +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; + + list_for_each_safe(act, tmp, + &(rndis_per_dev_params[configNr].resp_queue)) + { + r = list_entry(act, rndis_resp_t, list); + if (r && r->buf == buf) { + list_del(&r->list); + kfree(r); + } + } +} +EXPORT_SYMBOL_GPL(rndis_free_response); + +u8 *rndis_get_next_response(int configNr, u32 *length) +{ + rndis_resp_t *r; + struct list_head *act, *tmp; + + if (!length) return NULL; + + list_for_each_safe(act, tmp, + &(rndis_per_dev_params[configNr].resp_queue)) + { + r = list_entry(act, rndis_resp_t, list); + if (!r->send) { + r->send = 1; + *length = r->length; + return r->buf; + } + } + + return NULL; +} +EXPORT_SYMBOL_GPL(rndis_get_next_response); + +static rndis_resp_t *rndis_add_response(int configNr, u32 length) +{ + rndis_resp_t *r; + + /* NOTE: this gets copied into ether.c USB_BUFSIZ bytes ... */ + r = kmalloc(sizeof(rndis_resp_t) + length, GFP_ATOMIC); + if (!r) return NULL; + + r->buf = (u8 *)(r + 1); + r->length = length; + r->send = 0; + + list_add_tail(&r->list, + &(rndis_per_dev_params[configNr].resp_queue)); + return r; +} + +int rndis_rm_hdr(struct 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->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 + rndis_per_dev_params[i].confignr = i; + rndis_per_dev_params[i].used = 0; + rndis_per_dev_params[i].state = RNDIS_UNINITIALIZED; + rndis_per_dev_params[i].media_state + = 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 +} + |
