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redirect.c
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redirect.c
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/*
* USB redirector usb-guest
*
* Copyright (c) 2011-2012 Red Hat, Inc.
*
* Red Hat Authors:
* Hans de Goede <hdegoede@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu-common.h"
#include "qemu-timer.h"
#include "monitor.h"
#include "sysemu.h"
#include <dirent.h>
#include <sys/ioctl.h>
#include <signal.h>
#include <usbredirparser.h>
#include <usbredirfilter.h>
#include "hw/usb.h"
#define MAX_ENDPOINTS 32
#define NO_INTERFACE_INFO 255 /* Valid interface_count always <= 32 */
#define EP2I(ep_address) (((ep_address & 0x80) >> 3) | (ep_address & 0x0f))
#define I2EP(i) (((i & 0x10) << 3) | (i & 0x0f))
typedef struct USBRedirDevice USBRedirDevice;
/* Struct to hold buffered packets (iso or int input packets) */
struct buf_packet {
uint8_t *data;
int len;
int status;
QTAILQ_ENTRY(buf_packet)next;
};
struct endp_data {
uint8_t type;
uint8_t interval;
uint8_t interface; /* bInterfaceNumber this ep belongs to */
uint16_t max_packet_size; /* In bytes, not wMaxPacketSize format !! */
uint8_t iso_started;
uint8_t iso_error; /* For reporting iso errors to the HC */
uint8_t interrupt_started;
uint8_t interrupt_error;
uint8_t bufpq_prefilled;
uint8_t bufpq_dropping_packets;
QTAILQ_HEAD(, buf_packet) bufpq;
int32_t bufpq_size;
int32_t bufpq_target_size;
};
struct PacketIdQueueEntry {
uint64_t id;
QTAILQ_ENTRY(PacketIdQueueEntry)next;
};
struct PacketIdQueue {
USBRedirDevice *dev;
const char *name;
QTAILQ_HEAD(, PacketIdQueueEntry) head;
int size;
};
struct USBRedirDevice {
USBDevice dev;
/* Properties */
CharDriverState *cs;
uint8_t debug;
char *filter_str;
int32_t bootindex;
/* Data passed from chardev the fd_read cb to the usbredirparser read cb */
const uint8_t *read_buf;
int read_buf_size;
/* For async handling of close */
QEMUBH *chardev_close_bh;
/* To delay the usb attach in case of quick chardev close + open */
QEMUTimer *attach_timer;
int64_t next_attach_time;
struct usbredirparser *parser;
struct endp_data endpoint[MAX_ENDPOINTS];
struct PacketIdQueue cancelled;
struct PacketIdQueue already_in_flight;
/* Data for device filtering */
struct usb_redir_device_connect_header device_info;
struct usb_redir_interface_info_header interface_info;
struct usbredirfilter_rule *filter_rules;
int filter_rules_count;
};
static void usbredir_hello(void *priv, struct usb_redir_hello_header *h);
static void usbredir_device_connect(void *priv,
struct usb_redir_device_connect_header *device_connect);
static void usbredir_device_disconnect(void *priv);
static void usbredir_interface_info(void *priv,
struct usb_redir_interface_info_header *interface_info);
static void usbredir_ep_info(void *priv,
struct usb_redir_ep_info_header *ep_info);
static void usbredir_configuration_status(void *priv, uint64_t id,
struct usb_redir_configuration_status_header *configuration_status);
static void usbredir_alt_setting_status(void *priv, uint64_t id,
struct usb_redir_alt_setting_status_header *alt_setting_status);
static void usbredir_iso_stream_status(void *priv, uint64_t id,
struct usb_redir_iso_stream_status_header *iso_stream_status);
static void usbredir_interrupt_receiving_status(void *priv, uint64_t id,
struct usb_redir_interrupt_receiving_status_header
*interrupt_receiving_status);
static void usbredir_bulk_streams_status(void *priv, uint64_t id,
struct usb_redir_bulk_streams_status_header *bulk_streams_status);
static void usbredir_control_packet(void *priv, uint64_t id,
struct usb_redir_control_packet_header *control_packet,
uint8_t *data, int data_len);
static void usbredir_bulk_packet(void *priv, uint64_t id,
struct usb_redir_bulk_packet_header *bulk_packet,
uint8_t *data, int data_len);
static void usbredir_iso_packet(void *priv, uint64_t id,
struct usb_redir_iso_packet_header *iso_packet,
uint8_t *data, int data_len);
static void usbredir_interrupt_packet(void *priv, uint64_t id,
struct usb_redir_interrupt_packet_header *interrupt_header,
uint8_t *data, int data_len);
static int usbredir_handle_status(USBRedirDevice *dev,
int status, int actual_len);
#define VERSION "qemu usb-redir guest " QEMU_VERSION
/*
* Logging stuff
*/
#define ERROR(...) \
do { \
if (dev->debug >= usbredirparser_error) { \
error_report("usb-redir error: " __VA_ARGS__); \
} \
} while (0)
#define WARNING(...) \
do { \
if (dev->debug >= usbredirparser_warning) { \
error_report("usb-redir warning: " __VA_ARGS__); \
} \
} while (0)
#define INFO(...) \
do { \
if (dev->debug >= usbredirparser_info) { \
error_report("usb-redir: " __VA_ARGS__); \
} \
} while (0)
#define DPRINTF(...) \
do { \
if (dev->debug >= usbredirparser_debug) { \
error_report("usb-redir: " __VA_ARGS__); \
} \
} while (0)
#define DPRINTF2(...) \
do { \
if (dev->debug >= usbredirparser_debug_data) { \
error_report("usb-redir: " __VA_ARGS__); \
} \
} while (0)
static void usbredir_log(void *priv, int level, const char *msg)
{
USBRedirDevice *dev = priv;
if (dev->debug < level) {
return;
}
error_report("%s", msg);
}
static void usbredir_log_data(USBRedirDevice *dev, const char *desc,
const uint8_t *data, int len)
{
int i, j, n;
if (dev->debug < usbredirparser_debug_data) {
return;
}
for (i = 0; i < len; i += j) {
char buf[128];
n = sprintf(buf, "%s", desc);
for (j = 0; j < 8 && i + j < len; j++) {
n += sprintf(buf + n, " %02X", data[i + j]);
}
error_report("%s", buf);
}
}
/*
* usbredirparser io functions
*/
static int usbredir_read(void *priv, uint8_t *data, int count)
{
USBRedirDevice *dev = priv;
if (dev->read_buf_size < count) {
count = dev->read_buf_size;
}
memcpy(data, dev->read_buf, count);
dev->read_buf_size -= count;
if (dev->read_buf_size) {
dev->read_buf += count;
} else {
dev->read_buf = NULL;
}
return count;
}
static int usbredir_write(void *priv, uint8_t *data, int count)
{
USBRedirDevice *dev = priv;
if (!dev->cs->opened) {
return 0;
}
/* Don't send new data to the chardev until our state is fully synced */
if (!runstate_check(RUN_STATE_RUNNING)) {
return 0;
}
return qemu_chr_fe_write(dev->cs, data, count);
}
/*
* Cancelled and buffered packets helpers
*/
static void packet_id_queue_init(struct PacketIdQueue *q,
USBRedirDevice *dev, const char *name)
{
q->dev = dev;
q->name = name;
QTAILQ_INIT(&q->head);
q->size = 0;
}
static void packet_id_queue_add(struct PacketIdQueue *q, uint64_t id)
{
USBRedirDevice *dev = q->dev;
struct PacketIdQueueEntry *e;
DPRINTF("adding packet id %"PRIu64" to %s queue\n", id, q->name);
e = g_malloc0(sizeof(struct PacketIdQueueEntry));
e->id = id;
QTAILQ_INSERT_TAIL(&q->head, e, next);
q->size++;
}
static int packet_id_queue_remove(struct PacketIdQueue *q, uint64_t id)
{
USBRedirDevice *dev = q->dev;
struct PacketIdQueueEntry *e;
QTAILQ_FOREACH(e, &q->head, next) {
if (e->id == id) {
DPRINTF("removing packet id %"PRIu64" from %s queue\n",
id, q->name);
QTAILQ_REMOVE(&q->head, e, next);
q->size--;
g_free(e);
return 1;
}
}
return 0;
}
static void packet_id_queue_empty(struct PacketIdQueue *q)
{
USBRedirDevice *dev = q->dev;
struct PacketIdQueueEntry *e, *next_e;
DPRINTF("removing %d packet-ids from %s queue\n", q->size, q->name);
QTAILQ_FOREACH_SAFE(e, &q->head, next, next_e) {
QTAILQ_REMOVE(&q->head, e, next);
g_free(e);
}
q->size = 0;
}
static void usbredir_cancel_packet(USBDevice *udev, USBPacket *p)
{
USBRedirDevice *dev = DO_UPCAST(USBRedirDevice, dev, udev);
packet_id_queue_add(&dev->cancelled, p->id);
usbredirparser_send_cancel_data_packet(dev->parser, p->id);
usbredirparser_do_write(dev->parser);
}
static int usbredir_is_cancelled(USBRedirDevice *dev, uint64_t id)
{
if (!dev->dev.attached) {
return 1; /* Treat everything as cancelled after a disconnect */
}
return packet_id_queue_remove(&dev->cancelled, id);
}
static void usbredir_fill_already_in_flight_from_ep(USBRedirDevice *dev,
struct USBEndpoint *ep)
{
static USBPacket *p;
QTAILQ_FOREACH(p, &ep->queue, queue) {
packet_id_queue_add(&dev->already_in_flight, p->id);
}
}
static void usbredir_fill_already_in_flight(USBRedirDevice *dev)
{
int ep;
struct USBDevice *udev = &dev->dev;
usbredir_fill_already_in_flight_from_ep(dev, &udev->ep_ctl);
for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) {
usbredir_fill_already_in_flight_from_ep(dev, &udev->ep_in[ep]);
usbredir_fill_already_in_flight_from_ep(dev, &udev->ep_out[ep]);
}
}
static int usbredir_already_in_flight(USBRedirDevice *dev, uint64_t id)
{
return packet_id_queue_remove(&dev->already_in_flight, id);
}
static USBPacket *usbredir_find_packet_by_id(USBRedirDevice *dev,
uint8_t ep, uint64_t id)
{
USBPacket *p;
if (usbredir_is_cancelled(dev, id)) {
return NULL;
}
p = usb_ep_find_packet_by_id(&dev->dev,
(ep & USB_DIR_IN) ? USB_TOKEN_IN : USB_TOKEN_OUT,
ep & 0x0f, id);
if (p == NULL) {
ERROR("could not find packet with id %"PRIu64"\n", id);
}
return p;
}
static void bufp_alloc(USBRedirDevice *dev,
uint8_t *data, int len, int status, uint8_t ep)
{
struct buf_packet *bufp;
if (!dev->endpoint[EP2I(ep)].bufpq_dropping_packets &&
dev->endpoint[EP2I(ep)].bufpq_size >
2 * dev->endpoint[EP2I(ep)].bufpq_target_size) {
DPRINTF("bufpq overflow, dropping packets ep %02X\n", ep);
dev->endpoint[EP2I(ep)].bufpq_dropping_packets = 1;
}
/* Since we're interupting the stream anyways, drop enough packets to get
back to our target buffer size */
if (dev->endpoint[EP2I(ep)].bufpq_dropping_packets) {
if (dev->endpoint[EP2I(ep)].bufpq_size >
dev->endpoint[EP2I(ep)].bufpq_target_size) {
free(data);
return;
}
dev->endpoint[EP2I(ep)].bufpq_dropping_packets = 0;
}
bufp = g_malloc(sizeof(struct buf_packet));
bufp->data = data;
bufp->len = len;
bufp->status = status;
QTAILQ_INSERT_TAIL(&dev->endpoint[EP2I(ep)].bufpq, bufp, next);
dev->endpoint[EP2I(ep)].bufpq_size++;
}
static void bufp_free(USBRedirDevice *dev, struct buf_packet *bufp,
uint8_t ep)
{
QTAILQ_REMOVE(&dev->endpoint[EP2I(ep)].bufpq, bufp, next);
dev->endpoint[EP2I(ep)].bufpq_size--;
free(bufp->data);
g_free(bufp);
}
static void usbredir_free_bufpq(USBRedirDevice *dev, uint8_t ep)
{
struct buf_packet *buf, *buf_next;
QTAILQ_FOREACH_SAFE(buf, &dev->endpoint[EP2I(ep)].bufpq, next, buf_next) {
bufp_free(dev, buf, ep);
}
}
/*
* USBDevice callbacks
*/
static void usbredir_handle_reset(USBDevice *udev)
{
USBRedirDevice *dev = DO_UPCAST(USBRedirDevice, dev, udev);
DPRINTF("reset device\n");
usbredirparser_send_reset(dev->parser);
usbredirparser_do_write(dev->parser);
}
static int usbredir_handle_iso_data(USBRedirDevice *dev, USBPacket *p,
uint8_t ep)
{
int status, len;
if (!dev->endpoint[EP2I(ep)].iso_started &&
!dev->endpoint[EP2I(ep)].iso_error) {
struct usb_redir_start_iso_stream_header start_iso = {
.endpoint = ep,
};
int pkts_per_sec;
if (dev->dev.speed == USB_SPEED_HIGH) {
pkts_per_sec = 8000 / dev->endpoint[EP2I(ep)].interval;
} else {
pkts_per_sec = 1000 / dev->endpoint[EP2I(ep)].interval;
}
/* Testing has shown that we need circa 60 ms buffer */
dev->endpoint[EP2I(ep)].bufpq_target_size = (pkts_per_sec * 60) / 1000;
/* Aim for approx 100 interrupts / second on the client to
balance latency and interrupt load */
start_iso.pkts_per_urb = pkts_per_sec / 100;
if (start_iso.pkts_per_urb < 1) {
start_iso.pkts_per_urb = 1;
} else if (start_iso.pkts_per_urb > 32) {
start_iso.pkts_per_urb = 32;
}
start_iso.no_urbs = (dev->endpoint[EP2I(ep)].bufpq_target_size +
start_iso.pkts_per_urb - 1) /
start_iso.pkts_per_urb;
/* Output endpoints pre-fill only 1/2 of the packets, keeping the rest
as overflow buffer. Also see the usbredir protocol documentation */
if (!(ep & USB_DIR_IN)) {
start_iso.no_urbs *= 2;
}
if (start_iso.no_urbs > 16) {
start_iso.no_urbs = 16;
}
/* No id, we look at the ep when receiving a status back */
usbredirparser_send_start_iso_stream(dev->parser, 0, &start_iso);
usbredirparser_do_write(dev->parser);
DPRINTF("iso stream started pkts/sec %d pkts/urb %d urbs %d ep %02X\n",
pkts_per_sec, start_iso.pkts_per_urb, start_iso.no_urbs, ep);
dev->endpoint[EP2I(ep)].iso_started = 1;
dev->endpoint[EP2I(ep)].bufpq_prefilled = 0;
dev->endpoint[EP2I(ep)].bufpq_dropping_packets = 0;
}
if (ep & USB_DIR_IN) {
struct buf_packet *isop;
if (dev->endpoint[EP2I(ep)].iso_started &&
!dev->endpoint[EP2I(ep)].bufpq_prefilled) {
if (dev->endpoint[EP2I(ep)].bufpq_size <
dev->endpoint[EP2I(ep)].bufpq_target_size) {
return usbredir_handle_status(dev, 0, 0);
}
dev->endpoint[EP2I(ep)].bufpq_prefilled = 1;
}
isop = QTAILQ_FIRST(&dev->endpoint[EP2I(ep)].bufpq);
if (isop == NULL) {
DPRINTF("iso-token-in ep %02X, no isop, iso_error: %d\n",
ep, dev->endpoint[EP2I(ep)].iso_error);
/* Re-fill the buffer */
dev->endpoint[EP2I(ep)].bufpq_prefilled = 0;
/* Check iso_error for stream errors, otherwise its an underrun */
status = dev->endpoint[EP2I(ep)].iso_error;
dev->endpoint[EP2I(ep)].iso_error = 0;
return status ? USB_RET_IOERROR : 0;
}
DPRINTF2("iso-token-in ep %02X status %d len %d queue-size: %d\n", ep,
isop->status, isop->len, dev->endpoint[EP2I(ep)].bufpq_size);
status = isop->status;
if (status != usb_redir_success) {
bufp_free(dev, isop, ep);
return USB_RET_IOERROR;
}
len = isop->len;
if (len > p->iov.size) {
ERROR("received iso data is larger then packet ep %02X (%d > %d)\n",
ep, len, (int)p->iov.size);
bufp_free(dev, isop, ep);
return USB_RET_BABBLE;
}
usb_packet_copy(p, isop->data, len);
bufp_free(dev, isop, ep);
return len;
} else {
/* If the stream was not started because of a pending error don't
send the packet to the usb-host */
if (dev->endpoint[EP2I(ep)].iso_started) {
struct usb_redir_iso_packet_header iso_packet = {
.endpoint = ep,
.length = p->iov.size
};
uint8_t buf[p->iov.size];
/* No id, we look at the ep when receiving a status back */
usb_packet_copy(p, buf, p->iov.size);
usbredirparser_send_iso_packet(dev->parser, 0, &iso_packet,
buf, p->iov.size);
usbredirparser_do_write(dev->parser);
}
status = dev->endpoint[EP2I(ep)].iso_error;
dev->endpoint[EP2I(ep)].iso_error = 0;
DPRINTF2("iso-token-out ep %02X status %d len %zd\n", ep, status,
p->iov.size);
return usbredir_handle_status(dev, status, p->iov.size);
}
}
static void usbredir_stop_iso_stream(USBRedirDevice *dev, uint8_t ep)
{
struct usb_redir_stop_iso_stream_header stop_iso_stream = {
.endpoint = ep
};
if (dev->endpoint[EP2I(ep)].iso_started) {
usbredirparser_send_stop_iso_stream(dev->parser, 0, &stop_iso_stream);
DPRINTF("iso stream stopped ep %02X\n", ep);
dev->endpoint[EP2I(ep)].iso_started = 0;
}
dev->endpoint[EP2I(ep)].iso_error = 0;
usbredir_free_bufpq(dev, ep);
}
static int usbredir_handle_bulk_data(USBRedirDevice *dev, USBPacket *p,
uint8_t ep)
{
struct usb_redir_bulk_packet_header bulk_packet;
DPRINTF("bulk-out ep %02X len %zd id %"PRIu64"\n", ep, p->iov.size, p->id);
if (usbredir_already_in_flight(dev, p->id)) {
return USB_RET_ASYNC;
}
bulk_packet.endpoint = ep;
bulk_packet.length = p->iov.size;
bulk_packet.stream_id = 0;
if (ep & USB_DIR_IN) {
usbredirparser_send_bulk_packet(dev->parser, p->id,
&bulk_packet, NULL, 0);
} else {
uint8_t buf[p->iov.size];
usb_packet_copy(p, buf, p->iov.size);
usbredir_log_data(dev, "bulk data out:", buf, p->iov.size);
usbredirparser_send_bulk_packet(dev->parser, p->id,
&bulk_packet, buf, p->iov.size);
}
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
static int usbredir_handle_interrupt_data(USBRedirDevice *dev,
USBPacket *p, uint8_t ep)
{
if (ep & USB_DIR_IN) {
/* Input interrupt endpoint, buffered packet input */
struct buf_packet *intp;
int status, len;
if (!dev->endpoint[EP2I(ep)].interrupt_started &&
!dev->endpoint[EP2I(ep)].interrupt_error) {
struct usb_redir_start_interrupt_receiving_header start_int = {
.endpoint = ep,
};
/* No id, we look at the ep when receiving a status back */
usbredirparser_send_start_interrupt_receiving(dev->parser, 0,
&start_int);
usbredirparser_do_write(dev->parser);
DPRINTF("interrupt recv started ep %02X\n", ep);
dev->endpoint[EP2I(ep)].interrupt_started = 1;
/* We don't really want to drop interrupt packets ever, but
having some upper limit to how much we buffer is good. */
dev->endpoint[EP2I(ep)].bufpq_target_size = 1000;
dev->endpoint[EP2I(ep)].bufpq_dropping_packets = 0;
}
intp = QTAILQ_FIRST(&dev->endpoint[EP2I(ep)].bufpq);
if (intp == NULL) {
DPRINTF2("interrupt-token-in ep %02X, no intp\n", ep);
/* Check interrupt_error for stream errors */
status = dev->endpoint[EP2I(ep)].interrupt_error;
dev->endpoint[EP2I(ep)].interrupt_error = 0;
if (status) {
return usbredir_handle_status(dev, status, 0);
}
return USB_RET_NAK;
}
DPRINTF("interrupt-token-in ep %02X status %d len %d\n", ep,
intp->status, intp->len);
status = intp->status;
if (status != usb_redir_success) {
bufp_free(dev, intp, ep);
return usbredir_handle_status(dev, status, 0);
}
len = intp->len;
if (len > p->iov.size) {
ERROR("received int data is larger then packet ep %02X\n", ep);
bufp_free(dev, intp, ep);
return USB_RET_BABBLE;
}
usb_packet_copy(p, intp->data, len);
bufp_free(dev, intp, ep);
return len;
} else {
/* Output interrupt endpoint, normal async operation */
struct usb_redir_interrupt_packet_header interrupt_packet;
uint8_t buf[p->iov.size];
DPRINTF("interrupt-out ep %02X len %zd id %"PRIu64"\n", ep,
p->iov.size, p->id);
if (usbredir_already_in_flight(dev, p->id)) {
return USB_RET_ASYNC;
}
interrupt_packet.endpoint = ep;
interrupt_packet.length = p->iov.size;
usb_packet_copy(p, buf, p->iov.size);
usbredir_log_data(dev, "interrupt data out:", buf, p->iov.size);
usbredirparser_send_interrupt_packet(dev->parser, p->id,
&interrupt_packet, buf, p->iov.size);
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
}
static void usbredir_stop_interrupt_receiving(USBRedirDevice *dev,
uint8_t ep)
{
struct usb_redir_stop_interrupt_receiving_header stop_interrupt_recv = {
.endpoint = ep
};
if (dev->endpoint[EP2I(ep)].interrupt_started) {
usbredirparser_send_stop_interrupt_receiving(dev->parser, 0,
&stop_interrupt_recv);
DPRINTF("interrupt recv stopped ep %02X\n", ep);
dev->endpoint[EP2I(ep)].interrupt_started = 0;
}
dev->endpoint[EP2I(ep)].interrupt_error = 0;
usbredir_free_bufpq(dev, ep);
}
static int usbredir_handle_data(USBDevice *udev, USBPacket *p)
{
USBRedirDevice *dev = DO_UPCAST(USBRedirDevice, dev, udev);
uint8_t ep;
ep = p->ep->nr;
if (p->pid == USB_TOKEN_IN) {
ep |= USB_DIR_IN;
}
switch (dev->endpoint[EP2I(ep)].type) {
case USB_ENDPOINT_XFER_CONTROL:
ERROR("handle_data called for control transfer on ep %02X\n", ep);
return USB_RET_NAK;
case USB_ENDPOINT_XFER_ISOC:
return usbredir_handle_iso_data(dev, p, ep);
case USB_ENDPOINT_XFER_BULK:
return usbredir_handle_bulk_data(dev, p, ep);
case USB_ENDPOINT_XFER_INT:
return usbredir_handle_interrupt_data(dev, p, ep);
default:
ERROR("handle_data ep %02X has unknown type %d\n", ep,
dev->endpoint[EP2I(ep)].type);
return USB_RET_NAK;
}
}
static int usbredir_set_config(USBRedirDevice *dev, USBPacket *p,
int config)
{
struct usb_redir_set_configuration_header set_config;
int i;
DPRINTF("set config %d id %"PRIu64"\n", config, p->id);
for (i = 0; i < MAX_ENDPOINTS; i++) {
switch (dev->endpoint[i].type) {
case USB_ENDPOINT_XFER_ISOC:
usbredir_stop_iso_stream(dev, I2EP(i));
break;
case USB_ENDPOINT_XFER_INT:
if (i & 0x10) {
usbredir_stop_interrupt_receiving(dev, I2EP(i));
}
break;
}
usbredir_free_bufpq(dev, I2EP(i));
}
set_config.configuration = config;
usbredirparser_send_set_configuration(dev->parser, p->id, &set_config);
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
static int usbredir_get_config(USBRedirDevice *dev, USBPacket *p)
{
DPRINTF("get config id %"PRIu64"\n", p->id);
usbredirparser_send_get_configuration(dev->parser, p->id);
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
static int usbredir_set_interface(USBRedirDevice *dev, USBPacket *p,
int interface, int alt)
{
struct usb_redir_set_alt_setting_header set_alt;
int i;
DPRINTF("set interface %d alt %d id %"PRIu64"\n", interface, alt, p->id);
for (i = 0; i < MAX_ENDPOINTS; i++) {
if (dev->endpoint[i].interface == interface) {
switch (dev->endpoint[i].type) {
case USB_ENDPOINT_XFER_ISOC:
usbredir_stop_iso_stream(dev, I2EP(i));
break;
case USB_ENDPOINT_XFER_INT:
if (i & 0x10) {
usbredir_stop_interrupt_receiving(dev, I2EP(i));
}
break;
}
usbredir_free_bufpq(dev, I2EP(i));
}
}
set_alt.interface = interface;
set_alt.alt = alt;
usbredirparser_send_set_alt_setting(dev->parser, p->id, &set_alt);
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
static int usbredir_get_interface(USBRedirDevice *dev, USBPacket *p,
int interface)
{
struct usb_redir_get_alt_setting_header get_alt;
DPRINTF("get interface %d id %"PRIu64"\n", interface, p->id);
get_alt.interface = interface;
usbredirparser_send_get_alt_setting(dev->parser, p->id, &get_alt);
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
static int usbredir_handle_control(USBDevice *udev, USBPacket *p,
int request, int value, int index, int length, uint8_t *data)
{
USBRedirDevice *dev = DO_UPCAST(USBRedirDevice, dev, udev);
struct usb_redir_control_packet_header control_packet;
if (usbredir_already_in_flight(dev, p->id)) {
return USB_RET_ASYNC;
}
/* Special cases for certain standard device requests */
switch (request) {
case DeviceOutRequest | USB_REQ_SET_ADDRESS:
DPRINTF("set address %d\n", value);
dev->dev.addr = value;
return 0;
case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
return usbredir_set_config(dev, p, value & 0xff);
case DeviceRequest | USB_REQ_GET_CONFIGURATION:
return usbredir_get_config(dev, p);
case InterfaceOutRequest | USB_REQ_SET_INTERFACE:
return usbredir_set_interface(dev, p, index, value);
case InterfaceRequest | USB_REQ_GET_INTERFACE:
return usbredir_get_interface(dev, p, index);
}
/* Normal ctrl requests, note request is (bRequestType << 8) | bRequest */
DPRINTF(
"ctrl-out type 0x%x req 0x%x val 0x%x index %d len %d id %"PRIu64"\n",
request >> 8, request & 0xff, value, index, length, p->id);
control_packet.request = request & 0xFF;
control_packet.requesttype = request >> 8;
control_packet.endpoint = control_packet.requesttype & USB_DIR_IN;
control_packet.value = value;
control_packet.index = index;
control_packet.length = length;
if (control_packet.requesttype & USB_DIR_IN) {
usbredirparser_send_control_packet(dev->parser, p->id,
&control_packet, NULL, 0);
} else {
usbredir_log_data(dev, "ctrl data out:", data, length);
usbredirparser_send_control_packet(dev->parser, p->id,
&control_packet, data, length);
}
usbredirparser_do_write(dev->parser);
return USB_RET_ASYNC;
}
/*
* Close events can be triggered by usbredirparser_do_write which gets called
* from within the USBDevice data / control packet callbacks and doing a
* usb_detach from within these callbacks is not a good idea.
*
* So we use a bh handler to take care of close events.
*/
static void usbredir_chardev_close_bh(void *opaque)
{
USBRedirDevice *dev = opaque;
usbredir_device_disconnect(dev);
if (dev->parser) {
DPRINTF("destroying usbredirparser\n");
usbredirparser_destroy(dev->parser);
dev->parser = NULL;
}
}
static void usbredir_create_parser(USBRedirDevice *dev)
{
uint32_t caps[USB_REDIR_CAPS_SIZE] = { 0, };
int flags = 0;
DPRINTF("creating usbredirparser\n");
dev->parser = qemu_oom_check(usbredirparser_create());
dev->parser->priv = dev;
dev->parser->log_func = usbredir_log;
dev->parser->read_func = usbredir_read;
dev->parser->write_func = usbredir_write;
dev->parser->hello_func = usbredir_hello;
dev->parser->device_connect_func = usbredir_device_connect;
dev->parser->device_disconnect_func = usbredir_device_disconnect;
dev->parser->interface_info_func = usbredir_interface_info;
dev->parser->ep_info_func = usbredir_ep_info;
dev->parser->configuration_status_func = usbredir_configuration_status;
dev->parser->alt_setting_status_func = usbredir_alt_setting_status;
dev->parser->iso_stream_status_func = usbredir_iso_stream_status;
dev->parser->interrupt_receiving_status_func =
usbredir_interrupt_receiving_status;
dev->parser->bulk_streams_status_func = usbredir_bulk_streams_status;
dev->parser->control_packet_func = usbredir_control_packet;
dev->parser->bulk_packet_func = usbredir_bulk_packet;
dev->parser->iso_packet_func = usbredir_iso_packet;
dev->parser->interrupt_packet_func = usbredir_interrupt_packet;
dev->read_buf = NULL;
dev->read_buf_size = 0;
usbredirparser_caps_set_cap(caps, usb_redir_cap_connect_device_version);
usbredirparser_caps_set_cap(caps, usb_redir_cap_filter);
usbredirparser_caps_set_cap(caps, usb_redir_cap_ep_info_max_packet_size);
usbredirparser_caps_set_cap(caps, usb_redir_cap_64bits_ids);
if (runstate_check(RUN_STATE_INMIGRATE)) {
flags |= usbredirparser_fl_no_hello;
}
usbredirparser_init(dev->parser, VERSION, caps, USB_REDIR_CAPS_SIZE,
flags);
usbredirparser_do_write(dev->parser);
}
static void usbredir_reject_device(USBRedirDevice *dev)
{
usbredir_device_disconnect(dev);
if (usbredirparser_peer_has_cap(dev->parser, usb_redir_cap_filter)) {
usbredirparser_send_filter_reject(dev->parser);
usbredirparser_do_write(dev->parser);
}
}
static void usbredir_do_attach(void *opaque)
{
USBRedirDevice *dev = opaque;
/* In order to work properly with XHCI controllers we need these caps */
if ((dev->dev.port->speedmask & USB_SPEED_MASK_SUPER) && !(
usbredirparser_peer_has_cap(dev->parser,
usb_redir_cap_ep_info_max_packet_size) &&
usbredirparser_peer_has_cap(dev->parser,
usb_redir_cap_64bits_ids))) {
ERROR("usb-redir-host lacks capabilities needed for use with XHCI\n");
usbredir_reject_device(dev);
return;
}
if (usb_device_attach(&dev->dev) != 0) {
usbredir_reject_device(dev);
}
}
/*
* chardev callbacks
*/
static int usbredir_chardev_can_read(void *opaque)
{
USBRedirDevice *dev = opaque;
if (!dev->parser) {
WARNING("chardev_can_read called on non open chardev!\n");
return 0;
}
/* Don't read new data from the chardev until our state is fully synced */
if (!runstate_check(RUN_STATE_RUNNING)) {
return 0;
}
/* usbredir_parser_do_read will consume *all* data we give it */
return 1024 * 1024;
}
static void usbredir_chardev_read(void *opaque, const uint8_t *buf, int size)
{
USBRedirDevice *dev = opaque;
/* No recursion allowed! */
assert(dev->read_buf == NULL);
dev->read_buf = buf;
dev->read_buf_size = size;
usbredirparser_do_read(dev->parser);
/* Send any acks, etc. which may be queued now */
usbredirparser_do_write(dev->parser);
}
static void usbredir_chardev_event(void *opaque, int event)
{
USBRedirDevice *dev = opaque;
switch (event) {
case CHR_EVENT_OPENED:
DPRINTF("chardev open\n");
/* Make sure any pending closes are handled (no-op if none pending) */
usbredir_chardev_close_bh(dev);
qemu_bh_cancel(dev->chardev_close_bh);
usbredir_create_parser(dev);
break;
case CHR_EVENT_CLOSED:
DPRINTF("chardev close\n");
qemu_bh_schedule(dev->chardev_close_bh);
break;
}
}
/*
* init + destroy
*/
static void usbredir_vm_state_change(void *priv, int running, RunState state)
{
USBRedirDevice *dev = priv;