[Spice-devel] [PATCH spice-gtk v4 06/29] usb-redir: extend USB backend to support emulated devices
Victor Toso
victortoso at redhat.com
Tue Aug 27 10:03:46 UTC 2019
Hi,
Didn't check the whole series yet but I recall some other
comments in the patch besides the fixup. I'll comment later on
it.
On Tue, Aug 27, 2019 at 10:22:23AM +0100, Frediano Ziglio wrote:
> From: Yuri Benditovich <yuri.benditovich at daynix.com>
>
> Redirection of emulated devices requires special approach,
> as usbredirhost can't be used for that (it works only with
> libusb devices). For emulated devices we create instance of
> usbredirparser that implements USB redirection protocol.
> In order to work with the same set of protocol capabilities
> that usbredirhost sets up with remote side, the parser shall:
> - not send its own 'hello' to the server
> - initialize the same capabilities that usbredirhost
> - receive the same 'hello' response
> For that we analyze 'hello' sent by USB redir parser and
> extract set of capabilities from it and upon receive of
> 'hello' response we provide it also to the parser.
> When libusb device is redirected via a channel, instance of
> usbredirhost serves it.
> When emulated device is redirected via a channel, instance
> of usbredirparser does the job.
>
> Signed-off-by: Yuri Benditovich <yuri.benditovich at daynix.com>
> ---
> src/usb-backend.c | 616 +++++++++++++++++++++++++++++++++++++++++++---
> 1 file changed, 580 insertions(+), 36 deletions(-)
>
> diff --git a/src/usb-backend.c b/src/usb-backend.c
> index 252c0a64..9369bf5e 100644
> --- a/src/usb-backend.c
> +++ b/src/usb-backend.c
> @@ -55,6 +55,7 @@ struct _SpiceUsbBackendDevice
> gint ref_count;
> SpiceUsbBackendChannel *attached_to;
> UsbDeviceInformation device_info;
> + gboolean edev_configured;
> };
>
> struct _SpiceUsbBackend
> @@ -80,10 +81,20 @@ struct _SpiceUsbBackend
> struct _SpiceUsbBackendChannel
> {
> struct usbredirhost *usbredirhost;
> + struct usbredirhost *hidden_host;
> + struct usbredirparser *parser;
> + struct usbredirparser *hidden_parser;
> uint8_t *read_buf;
> int read_buf_size;
> struct usbredirfilter_rule *rules;
> int rules_count;
> + uint32_t host_caps;
> + uint32_t parser_init_done : 1;
> + uint32_t parser_with_hello : 1;
> + uint32_t hello_done_parser : 1;
> + uint32_t hello_sent : 1;
> + uint32_t rejected : 1;
> + uint32_t wait_disc_ack : 1;
> SpiceUsbBackendDevice *attached;
> SpiceUsbredirChannel *user_data;
> SpiceUsbBackend *backend;
> @@ -355,7 +366,11 @@ gboolean spice_usb_backend_device_isoch(SpiceUsbBackendDevice *dev)
> gint i, j, k;
> int rc;
>
> - g_return_val_if_fail(libdev != NULL, 0);
> + g_return_val_if_fail(libdev != NULL || dev->edev != NULL, 0);
> + if (dev->edev) {
> + /* currently we do not emulate isoch devices */
> + return FALSE;
> + }
>
> rc = libusb_get_active_config_descriptor(libdev, &conf_desc);
> if (rc) {
> @@ -390,13 +405,16 @@ from both the main thread as well as from the usb event handling thread */
> static void usbredir_write_flush_callback(void *user_data)
> {
> SpiceUsbBackendChannel *ch = user_data;
> - if (!ch->usbredirhost) {
> - /* just to be on the safe side */
> - return;
> - }
> if (is_channel_ready(ch->user_data)) {
> - SPICE_DEBUG("%s ch %p -> usbredirhost", __FUNCTION__, ch);
> - usbredirhost_write_guest_data(ch->usbredirhost);
> + if (ch->usbredirhost) {
> + SPICE_DEBUG("%s ch %p -> usbredirhost", __FUNCTION__, ch);
> + usbredirhost_write_guest_data(ch->usbredirhost);
> + } else if (ch->parser) {
> + SPICE_DEBUG("%s ch %p -> parser", __FUNCTION__, ch);
> + usbredirparser_do_write(ch->parser);
> + } else {
> + SPICE_DEBUG("%s ch %p (NOT ACTIVE)", __FUNCTION__, ch);
> + }
> } else {
> SPICE_DEBUG("%s ch %p (not ready)", __FUNCTION__, ch);
> }
> @@ -551,13 +569,52 @@ void spice_usb_backend_device_unref(SpiceUsbBackendDevice *dev)
> }
> }
>
> -int spice_usb_backend_device_check_filter(
> - SpiceUsbBackendDevice *dev,
> - const struct usbredirfilter_rule *rules,
> - int count)
> +static int check_edev_device_filter(SpiceUsbBackendDevice *dev,
> + const struct usbredirfilter_rule *rules,
> + int count)
> {
> - return usbredirhost_check_device_filter(
> - rules, count, dev->libusb_device, 0);
> + SpiceUsbEmulatedDevice *edev = dev->edev;
> + uint8_t cls[32], subcls[32], proto[32], *cfg, ifnum = 0;
> + uint16_t size, offset = 0;
> + if (!edev) {
> + return 1;
> + }
> + if (!device_ops(edev)->get_descriptor(edev, LIBUSB_DT_CONFIG, 0, (void **)&cfg, &size)) {
> + return 1;
> + }
> + while ((offset + 1) < size) {
> + uint8_t len = cfg[offset];
> + uint8_t type = cfg[offset + 1];
> + if ((offset + len) > size) {
> + break;
> + }
> + if (type == LIBUSB_DT_INTERFACE) {
> + cls[ifnum] = cfg[offset + 5];
> + subcls[ifnum] = cfg[offset + 6];
> + proto[ifnum] = cfg[offset + 7];
> + ifnum++;
> + }
> + offset += len;
> + }
> +
> + return usbredirfilter_check(rules, count,
> + dev->device_info.class,
> + dev->device_info.subclass,
> + dev->device_info.protocol,
> + cls, subcls, proto, ifnum,
> + dev->device_info.vid,
> + dev->device_info.pid,
> + dev->device_info.bcdUSB, 0);
> +}
> +
> +int spice_usb_backend_device_check_filter(SpiceUsbBackendDevice *dev,
> + const struct usbredirfilter_rule *rules, int count)
> +{
> + if (dev->libusb_device) {
> + return usbredirhost_check_device_filter(rules, count, dev->libusb_device, 0);
> + } else {
> + return check_edev_device_filter(dev, rules, count);
> + }
> }
>
> static int usbredir_read_callback(void *user_data, uint8_t *data, int count)
> @@ -621,6 +678,17 @@ static int usbredir_write_callback(void *user_data, uint8_t *data, int count)
> SpiceUsbBackendChannel *ch = user_data;
> int res;
> SPICE_DEBUG("%s ch %p, %d bytes", __FUNCTION__, ch, count);
> + if (!ch->hello_sent) {
> + /* hello is short header (12) + hello struct (64) + capabilities (4) */
> + int hello_size = sizeof(struct usb_redir_header) + sizeof(struct usb_redir_hello_header);
> + ch->hello_sent = 1;
> + if (count == hello_size) {
> + memcpy(&ch->host_caps, data + hello_size - sizeof(ch->host_caps),
> + sizeof(ch->host_caps));
> + SPICE_DEBUG("%s ch %p, sending first hello, caps %08X",
> + __FUNCTION__, ch, ch->host_caps);
> + }
> + }
> res = spice_usbredir_write_callback(ch->user_data, data, count);
> return res;
> }
> @@ -641,6 +709,27 @@ int spice_usb_backend_read_guest_data(SpiceUsbBackendChannel *ch, uint8_t *data,
> ch->read_buf_size = count;
> if (ch->usbredirhost) {
> res = usbredirhost_read_guest_data(ch->usbredirhost);
> + if (!ch->hello_done_parser) {
> + int res_parser;
> + /* usbredirhost should consume hello response */
> + g_return_val_if_fail(ch->read_buf == NULL, USB_REDIR_ERROR_READ_PARSE);
> +
> + ch->read_buf = data;
> + ch->read_buf_size = count;
> + ch->hello_done_parser = 1;
> + if (ch->attached && ch->attached->edev) {
> + /* case of CD sharing on connect */
> + ch->usbredirhost = NULL;
> + ch->parser = ch->hidden_parser;
> + SPICE_DEBUG("%s: switch %p to parser", __FUNCTION__, ch);
> + }
> + res_parser = usbredirparser_do_read(ch->hidden_parser);
> + if (res >= 0) {
> + res = res_parser;
> + }
> + }
> + } else if (ch->parser) {
> + res = usbredirparser_do_read(ch->parser);
> } else {
> res = USB_REDIR_ERROR_IO;
> }
> @@ -661,6 +750,11 @@ int spice_usb_backend_read_guest_data(SpiceUsbBackendChannel *ch, uint8_t *data,
> }
> SPICE_DEBUG("%s ch %p, %d bytes, res %d", __FUNCTION__, ch, count, res);
>
> + if (ch->rejected) {
> + ch->rejected = 0;
> + res = USB_REDIR_ERROR_DEV_REJECTED;
> + }
> +
> return res;
> }
>
> @@ -690,13 +784,426 @@ GError *spice_usb_backend_get_error_details(int error_code, gchar *desc)
> void spice_usb_backend_return_write_data(SpiceUsbBackendChannel *ch, void *data)
> {
> if (ch->usbredirhost) {
> - SPICE_DEBUG("%s ch %p", __FUNCTION__, ch);
> + SPICE_DEBUG("%s ch %p -> usbredirhost", __FUNCTION__, ch);
> usbredirhost_free_write_buffer(ch->usbredirhost, data);
> + } else if (ch->parser) {
> + SPICE_DEBUG("%s ch %p -> parser", __FUNCTION__, ch);
> + usbredirparser_free_write_buffer(ch->parser, data);
> } else {
> SPICE_DEBUG("%s ch %p - NOBODY TO CALL", __FUNCTION__, ch);
> }
> }
>
> +static void usbredir_control_packet(void *priv,
> + uint64_t id, struct usb_redir_control_packet_header *h,
> + uint8_t *data, int data_len)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + SpiceUsbBackendDevice *d = ch->attached;
> + SpiceUsbEmulatedDevice *edev = d ? d->edev : NULL;
> + struct usb_redir_control_packet_header response = *h;
> + uint8_t reqtype = h->requesttype & 0x7f;
> + gboolean done = FALSE;
> + void *out_buffer = NULL;
> +
> + response.status = usb_redir_stall;
> + SPICE_DEBUG("%s %p: TRVIL %02X %02X %04X %04X %04X",
> + __FUNCTION__,
> + ch, h->requesttype, h->request,
> + h->value, h->index, h->length);
> +
> + if (!edev) {
> + SPICE_DEBUG("%s: device not attached", __FUNCTION__);
> + response.status = usb_redir_ioerror;
> + done = TRUE;
> + } else if (reqtype == (LIBUSB_REQUEST_TYPE_STANDARD | LIBUSB_RECIPIENT_DEVICE) &&
> + h->request == LIBUSB_REQUEST_GET_DESCRIPTOR) {
> + uint16_t size;
> + done = device_ops(edev)->get_descriptor(edev, h->value >> 8, h->value & 0xff,
> + &out_buffer, &size);
> + response.length = size;
> + if (done) {
> + response.status = 0;
> + }
> + done = TRUE;
> + }
> +
> + if (!done) {
> + device_ops(edev)->control_request(edev, data, data_len, &response, &out_buffer);
> + done = TRUE;
> + }
> +
> + if (response.status) {
> + response.length = 0;
> + } else if (response.length > h->length) {
> + response.length = h->length;
> + }
> +
> + SPICE_DEBUG("%s responding with payload of %02X, status %X",
> + __FUNCTION__, response.length, response.status);
> + usbredirparser_send_control_packet(ch->parser, id, &response,
> + response.length ? out_buffer : NULL,
> + response.length);
> +
> + usbredir_write_flush_callback(ch);
> + usbredirparser_free_packet_data(ch->parser, data);
> +}
> +
> +static void usbredir_bulk_packet(void *priv,
> + uint64_t id, struct usb_redir_bulk_packet_header *h,
> + uint8_t *data, int data_len)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + SpiceUsbBackendDevice *d = ch->attached;
> + SpiceUsbEmulatedDevice *edev = d ? d->edev : NULL;
> + struct usb_redir_bulk_packet_header hout = *h;
> + uint32_t len = (h->length_high << 16) | h->length;
> + SPICE_DEBUG("%s %p: ep %X, len %u, id %" G_GUINT64_FORMAT, __FUNCTION__,
> + ch, h->endpoint, len, id);
> +
> + if (!edev) {
> + SPICE_DEBUG("%s: device not attached", __FUNCTION__);
> + hout.status = usb_redir_ioerror;
> + hout.length = hout.length_high = 0;
> + SPICE_DEBUG("%s: responding with ZLP status %d", __FUNCTION__, hout.status);
> + } else if (h->endpoint & LIBUSB_ENDPOINT_IN) {
> + if (device_ops(edev)->bulk_in_request(edev, id, &hout)) {
> + usbredirparser_free_packet_data(ch->parser, data);
> + /* completion is asynchronous */
> + return;
> + }
> + } else {
> + hout.status = usb_redir_stall;
> + device_ops(edev)->bulk_out_request(edev, h->endpoint, data, data_len, &hout.status);
> + SPICE_DEBUG("%s: responding status %d", __FUNCTION__, hout.status);
> + }
> +
> + usbredirparser_send_bulk_packet(ch->parser, id, &hout, NULL, 0);
> + usbredirparser_free_packet_data(ch->parser, data);
> + usbredir_write_flush_callback(ch);
> +}
> +
> +static void usbredir_device_reset(void *priv)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + SpiceUsbBackendDevice *d = ch->attached;
> + SpiceUsbEmulatedDevice *edev = d ? d->edev : NULL;
> + SPICE_DEBUG("%s ch %p", __FUNCTION__, ch);
> + if (edev) {
> + device_ops(edev)->reset(edev);
> + }
> +}
> +
> +static void usbredir_interface_info(void *priv,
> + struct usb_redir_interface_info_header *interface_info)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + SPICE_DEBUG("%s not implemented %p", __FUNCTION__, ch);
> +}
> +
> +static void usbredir_interface_ep_info(void *priv,
> + struct usb_redir_ep_info_header *ep_info)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + SPICE_DEBUG("%s not implemented %p", __FUNCTION__, ch);
> +}
> +
> +static void usbredir_set_configuration(void *priv,
> + uint64_t id, struct usb_redir_set_configuration_header *set_configuration)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + struct usb_redir_configuration_status_header h;
> + h.status = 0;
> + h.configuration = set_configuration->configuration;
> + SPICE_DEBUG("%s ch %p, cfg %d", __FUNCTION__, ch, h.configuration);
> + if (ch->attached) {
> + ch->attached->edev_configured = h.configuration != 0;
> + }
> + usbredirparser_send_configuration_status(ch->parser, id, &h);
> + usbredir_write_flush_callback(ch);
> +}
> +
> +static void usbredir_get_configuration(void *priv, uint64_t id)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + struct usb_redir_configuration_status_header h;
> + h.status = 0;
> + h.configuration = ch->attached && ch->attached->edev_configured;
> + SPICE_DEBUG("%s ch %p, cfg %d", __FUNCTION__, ch, h.configuration);
> + usbredirparser_send_configuration_status(ch->parser, id, &h);
> + usbredir_write_flush_callback(ch);
> +}
> +
> +static void usbredir_set_alt_setting(void *priv,
> + uint64_t id, struct usb_redir_set_alt_setting_header *s)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + struct usb_redir_alt_setting_status_header sh;
> + sh.status = (!s->interface && !s->alt) ? 0 : usb_redir_stall;
> + sh.interface = s->interface;
> + sh.alt = s->alt;
> + SPICE_DEBUG("%s ch %p, %d:%d", __FUNCTION__, ch, s->interface, s->alt);
> + usbredirparser_send_alt_setting_status(ch->parser, id, &sh);
> + usbredir_write_flush_callback(ch);
> +}
> +
> +static void usbredir_get_alt_setting(void *priv,
> + uint64_t id, struct usb_redir_get_alt_setting_header *s)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + struct usb_redir_alt_setting_status_header sh;
> + sh.status = (s->interface == 0) ? 0 : usb_redir_stall;
> + sh.interface = s->interface;
> + sh.alt = 0;
> + SPICE_DEBUG("%s ch %p, if %d", __FUNCTION__, ch, s->interface);
> + usbredirparser_send_alt_setting_status(ch->parser, id, &sh);
> + usbredir_write_flush_callback(ch);
> +}
> +
> +static void usbredir_cancel_data(void *priv, uint64_t id)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + SpiceUsbBackendDevice *d = ch->attached;
> + SpiceUsbEmulatedDevice *edev = d ? d->edev : NULL;
> + if (!edev) {
> + SPICE_DEBUG("%s: device not attached", __FUNCTION__);
> + return;
> + }
> + device_ops(edev)->cancel_request(edev, id);
> +}
> +
> +static void usbredir_filter_reject(void *priv)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + SPICE_DEBUG("%s %p", __FUNCTION__, ch);
> + ch->rejected = 1;
> +}
> +
> +/* Note that the ownership of the rules array is passed on to the callback. */
> +static void usbredir_filter_filter(void *priv,
> + struct usbredirfilter_rule *r, int count)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + SPICE_DEBUG("%s ch %p %d filters", __FUNCTION__, ch, count);
> +
> + free(ch->rules);
> +
> + ch->rules = r;
> + ch->rules_count = count;
> + if (count) {
> + int i;
> + for (i = 0; i < count; i++) {
> + SPICE_DEBUG("%s class %d, %X:%X",
> + r[i].allow ? "allowed" : "denied", r[i].device_class,
> + (uint32_t)r[i].vendor_id, (uint32_t)r[i].product_id);
> + }
> + }
> +}
> +
> +static void usbredir_device_disconnect_ack(void *priv)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + SPICE_DEBUG("%s ch %p", __FUNCTION__, ch);
> + if (ch->parser && ch->wait_disc_ack) {
> + ch->parser = NULL;
> + SPICE_DEBUG("%s switch to usbredirhost", __FUNCTION__);
> + ch->usbredirhost = ch->hidden_host;
> + }
> + ch->wait_disc_ack = 0;
> +}
> +
> +static void usbredir_hello(void *priv,
> + struct usb_redir_hello_header *hello)
> +{
> + SpiceUsbBackendChannel *ch = priv;
> + SpiceUsbBackendDevice *d = ch->attached;
> + SpiceUsbEmulatedDevice *edev = d ? d->edev : NULL;
> + struct usb_redir_device_connect_header device_connect;
> + struct usb_redir_ep_info_header ep_info = { 0 };
> + struct usb_redir_interface_info_header interface_info = { 0 };
> + uint8_t *cfg;
> + uint16_t size, offset = 0;
> + SPICE_DEBUG("%s %p %sattached %s", __FUNCTION__, ch,
> + edev ? "" : "not ", hello ? "" : "(internal)");
> +
> + if (hello) {
> + ch->hello_done_parser = 1;
> + }
> + if (!edev) {
> + return;
> + }
> + if (!device_ops(edev)->get_descriptor(edev, LIBUSB_DT_CONFIG, 0, (void **)&cfg, &size)) {
> + return;
> + }
> + while ((offset + 1) < size) {
> + uint8_t len = cfg[offset];
> + uint8_t type = cfg[offset + 1];
> + if ((offset + len) > size) {
> + break;
> + }
> + if (type == LIBUSB_DT_INTERFACE) {
> + uint32_t i = interface_info.interface_count;
> + uint8_t class, subclass, protocol;
> + class = cfg[offset + 5];
> + subclass = cfg[offset + 6];
> + protocol = cfg[offset + 7];
> + interface_info.interface_class[i] = class;
> + interface_info.interface_subclass[i] = subclass;
> + interface_info.interface_protocol[i] = protocol;
> + interface_info.interface_count++;
> + SPICE_DEBUG("%s IF%d: %d/%d/%d", __FUNCTION__, i, class, subclass, protocol);
> + } else if (type == LIBUSB_DT_ENDPOINT) {
> + uint8_t address = cfg[offset + 2];
> + uint16_t max_packet_size = 0x100 * cfg[offset + 5] + cfg[offset + 4];
> + uint8_t index = address & 0xf;
> + if (address & 0x80) index += 0x10;
> + ep_info.type[index] = cfg[offset + 3] & 0x3;
> + ep_info.max_packet_size[index] = max_packet_size;
> + SPICE_DEBUG("%s EP[%02X]: %d/%d", __FUNCTION__, index, ep_info.type[index], max_packet_size);
> + }
> + offset += len;
> + }
> +
> + usbredirparser_send_interface_info(ch->parser, &interface_info);
> + usbredirparser_send_ep_info(ch->parser, &ep_info);
> +
> + device_connect.device_class = 0; //d->device_info.class;
> + device_connect.device_subclass = 0; //d->device_info.subclass;
> + device_connect.device_protocol = 0; //d->device_info.protocol;;
> + device_connect.vendor_id = d->device_info.vid;
> + device_connect.product_id = d->device_info.pid;
> + device_connect.device_version_bcd = d->device_info.bcdUSB;
> + device_connect.speed = usb_redir_speed_high;
> + usbredirparser_send_device_connect(ch->parser, &device_connect);
> + usbredir_write_flush_callback(ch);
> +}
> +
> +static void initialize_parser(SpiceUsbBackendChannel *ch, gboolean do_hello)
> +{
> + uint32_t flags, caps[USB_REDIR_CAPS_SIZE] = { 0 };
> +
> + g_return_if_fail(ch->hidden_parser != NULL);
> + if (ch->parser_init_done) {
> + if (ch->parser_with_hello != do_hello) {
> + g_return_if_reached();
> + }
> + return;
> + }
> +
> + ch->parser_init_done = 1;
> + ch->parser_with_hello = do_hello;
> + flags = usbredirparser_fl_write_cb_owns_buffer | usbredirparser_fl_usb_host;
> +
> + if (do_hello) {
> + ch->hello_sent = 1;
> + ch->host_caps |= 1 << usb_redir_cap_connect_device_version;
> + ch->host_caps |= 1 << usb_redir_cap_device_disconnect_ack;
> + ch->host_caps |= 1 << usb_redir_cap_ep_info_max_packet_size;
> + ch->host_caps |= 1 << usb_redir_cap_64bits_ids;
> + ch->host_caps |= 1 << usb_redir_cap_32bits_bulk_length;
> + } else {
> + flags |= usbredirparser_fl_no_hello;
> + }
> +
> + if (ch->host_caps & (1 << usb_redir_cap_connect_device_version)) {
> + usbredirparser_caps_set_cap(caps, usb_redir_cap_connect_device_version);
> + }
> + usbredirparser_caps_set_cap(caps, usb_redir_cap_filter);
> + if (ch->host_caps & (1 << usb_redir_cap_device_disconnect_ack)) {
> + usbredirparser_caps_set_cap(caps, usb_redir_cap_device_disconnect_ack);
> + }
> + if (ch->host_caps & (1 << usb_redir_cap_ep_info_max_packet_size)) {
> + usbredirparser_caps_set_cap(caps, usb_redir_cap_ep_info_max_packet_size);
> + }
> + if (ch->host_caps & (1 << usb_redir_cap_64bits_ids)) {
> + usbredirparser_caps_set_cap(caps, usb_redir_cap_64bits_ids);
> + }
> + if (ch->host_caps & (1 << usb_redir_cap_32bits_bulk_length)) {
> + usbredirparser_caps_set_cap(caps, usb_redir_cap_32bits_bulk_length);
> + }
> + if (ch->host_caps & (1 << usb_redir_cap_bulk_streams)) {
> + usbredirparser_caps_set_cap(caps, usb_redir_cap_bulk_streams);
> + }
> + usbredirparser_init(ch->hidden_parser, PACKAGE_STRING, caps, USB_REDIR_CAPS_SIZE, flags);
> +}
> +
> +/*
> + We can initialize the usbredirparser with HELLO enabled only in case
> + the libusb is not active and the usbredirhost does not function.
> + Then the parser sends session HELLO and receives server's response.
> + Otherwise (usbredirparser initialized with HELLO disabled):
> + - the usbredirhost sends session HELLO
> + - we look into it to know set of capabilities we shall initialize
> + the parser with
> + - when we receive server's response to HELLO we provide it also to
> + parser to let it synchronize with server's capabilities
> +*/
> +static struct usbredirparser *create_parser(SpiceUsbBackendChannel *ch)
> +{
> + struct usbredirparser *parser = usbredirparser_create();
> +
> + g_return_val_if_fail(parser != NULL, NULL);
> +
> + parser->priv = ch;
> + parser->log_func = usbredir_log;
> + parser->read_func = usbredir_read_callback;
> + parser->write_func = usbredir_write_callback;
> + parser->reset_func = usbredir_device_reset;
> + parser->set_configuration_func = usbredir_set_configuration;
> + parser->get_configuration_func = usbredir_get_configuration;
> + parser->set_alt_setting_func = usbredir_set_alt_setting;
> + parser->get_alt_setting_func = usbredir_get_alt_setting;
> + parser->cancel_data_packet_func = usbredir_cancel_data;
> + parser->control_packet_func = usbredir_control_packet;
> + parser->bulk_packet_func = usbredir_bulk_packet;
> + parser->alloc_lock_func = usbredir_alloc_lock;
> + parser->lock_func = usbredir_lock_lock;
> + parser->unlock_func = usbredir_unlock_lock;
> + parser->free_lock_func = usbredir_free_lock;
> + parser->hello_func = usbredir_hello;
> + parser->filter_reject_func = usbredir_filter_reject;
> + parser->device_disconnect_ack_func = usbredir_device_disconnect_ack;
> + parser->interface_info_func = usbredir_interface_info;
> + parser->ep_info_func = usbredir_interface_ep_info;
> + parser->filter_filter_func = usbredir_filter_filter;
> +
> + return parser;
> +}
> +
> +static gboolean attach_edev(SpiceUsbBackendChannel *ch,
> + SpiceUsbBackendDevice *dev,
> + GError **error)
> +{
> + if (!dev->edev) {
> + g_set_error(error, SPICE_CLIENT_ERROR, SPICE_CLIENT_ERROR_FAILED,
> + _("Failed to redirect device %d"), 1);
> + return FALSE;
> + }
> + if (ch->usbredirhost && !ch->hello_done_parser) {
> + /*
> + we can't initialize parser until we see hello from usbredir
> + and the parser can't work until it sees the hello response.
> + this is case of autoconnect when emulated device is attached
> + before the channel is up
> + */
> + SPICE_DEBUG("%s waiting until the channel is ready", __FUNCTION__);
> +
> + } else {
> + initialize_parser(ch, ch->hidden_host == NULL);
> + ch->usbredirhost = NULL;
> + ch->parser = ch->hidden_parser;
> + }
> + ch->wait_disc_ack = 0;
> + ch->attached = dev;
> + dev->attached_to = ch;
> + device_ops(dev->edev)->attach(dev->edev, ch->hidden_parser);
> + if (ch->hello_done_parser) {
> + /* send device info */
> + usbredir_hello(ch, NULL);
> + }
> + return TRUE;
> +}
> +
> gboolean spice_usb_backend_channel_attach(SpiceUsbBackendChannel *ch,
> SpiceUsbBackendDevice *dev,
> GError **error)
> @@ -706,7 +1213,13 @@ gboolean spice_usb_backend_channel_attach(SpiceUsbBackendChannel *ch,
>
> g_return_val_if_fail(dev != NULL, FALSE);
>
> + if (!dev->libusb_device) {
> + return attach_edev(ch, dev, error);
> + }
> +
> libusb_device_handle *handle = NULL;
> + ch->usbredirhost = ch->hidden_host;
> + ch->parser = NULL;
>
> /*
> Under Windows we need to avoid updating
> @@ -740,18 +1253,33 @@ gboolean spice_usb_backend_channel_attach(SpiceUsbBackendChannel *ch,
>
> void spice_usb_backend_channel_detach(SpiceUsbBackendChannel *ch)
> {
> + SpiceUsbBackendDevice *d = ch->attached;
> + SpiceUsbEmulatedDevice *edev = d ? d->edev : NULL;
> SPICE_DEBUG("%s >> ch %p, was attached %p", __FUNCTION__, ch, ch->attached);
> - if (!ch->attached) {
> + if (!d) {
> SPICE_DEBUG("%s: nothing to detach", __FUNCTION__);
> return;
> }
> if (ch->usbredirhost) {
> /* it will call libusb_close internally */
> usbredirhost_set_device(ch->usbredirhost, NULL);
> + } else if (ch->parser) {
> + if (edev) {
> + device_ops(edev)->detach(edev);
> + }
> + usbredirparser_send_device_disconnect(ch->parser);
> + usbredir_write_flush_callback(ch);
> + ch->wait_disc_ack = usbredirparser_peer_has_cap(ch->parser,
> + usb_redir_cap_device_disconnect_ack);
> + if (!ch->wait_disc_ack) {
> + ch->usbredirhost = ch->hidden_host;
> + ch->parser = NULL;
> + }
> }
> SPICE_DEBUG("%s ch %p, detach done", __FUNCTION__, ch);
> ch->attached->attached_to = NULL;
> ch->attached = NULL;
> + ch->rejected = 0;
> }
>
> SpiceUsbBackendChannel *spice_usb_backend_channel_new(SpiceUsbBackend *be,
> @@ -766,26 +1294,33 @@ SpiceUsbBackendChannel *spice_usb_backend_channel_new(SpiceUsbBackend *be,
> ch->user_data = SPICE_USBREDIR_CHANNEL(user_data);
> if (be->libusb_context) {
> ch->backend = be;
> - ch->usbredirhost = usbredirhost_open_full(
> - be->libusb_context,
> - NULL,
> - usbredir_log,
> - usbredir_read_callback,
> - usbredir_write_callback,
> - usbredir_write_flush_callback,
> - usbredir_alloc_lock,
> - usbredir_lock_lock,
> - usbredir_unlock_lock,
> - usbredir_free_lock,
> - ch, PACKAGE_STRING,
> - spice_util_get_debug() ? usbredirparser_debug : usbredirparser_warning,
> - usbredirhost_fl_write_cb_owns_buffer);
> + ch->usbredirhost =
> + usbredirhost_open_full(be->libusb_context,
> + NULL,
> + usbredir_log,
> + usbredir_read_callback,
> + usbredir_write_callback,
> + usbredir_write_flush_callback,
> + usbredir_alloc_lock,
> + usbredir_lock_lock,
> + usbredir_unlock_lock,
> + usbredir_free_lock,
> + ch, PACKAGE_STRING,
> + spice_util_get_debug() ? usbredirparser_debug :
> + usbredirparser_warning,
> + usbredirhost_fl_write_cb_owns_buffer);
> g_warn_if_fail(ch->usbredirhost != NULL);
> }
> +
> if (ch->usbredirhost) {
> - usbredirhost_set_buffered_output_size_cb(ch->usbredirhost, usbredir_buffered_output_size_callback);
> - } else {
> - g_free(ch);
> + ch->hidden_parser = create_parser(ch);
> + ch->hidden_host = ch->usbredirhost;
> + usbredirhost_set_buffered_output_size_cb(ch->usbredirhost,
> + usbredir_buffered_output_size_callback);
> + }
> +
> + if (!ch->hidden_parser) {
> + spice_usb_backend_channel_delete(ch);
> ch = NULL;
> }
>
> @@ -795,9 +1330,14 @@ SpiceUsbBackendChannel *spice_usb_backend_channel_new(SpiceUsbBackend *be,
>
> void spice_usb_backend_channel_flush_writes(SpiceUsbBackendChannel *ch)
> {
> - SPICE_DEBUG("%s %p, host %p", __FUNCTION__, ch, ch->usbredirhost);
> + SPICE_DEBUG("%s %p is up", __FUNCTION__, ch);
> if (ch->usbredirhost) {
> usbredirhost_write_guest_data(ch->usbredirhost);
> + initialize_parser(ch, FALSE);
> + } else {
> + initialize_parser(ch, TRUE);
> + ch->parser = ch->hidden_parser;
> + usbredirparser_do_write(ch->parser);
> }
> }
>
> @@ -807,12 +1347,16 @@ void spice_usb_backend_channel_delete(SpiceUsbBackendChannel *ch)
> if (!ch) {
> return;
> }
> - if (ch->usbredirhost) {
> - usbredirhost_close(ch->usbredirhost);
> + if (ch->hidden_host) {
> + usbredirhost_close(ch->hidden_host);
> + }
> + if (ch->hidden_parser) {
> + usbredirparser_destroy(ch->hidden_parser);
> }
>
> if (ch->rules) {
> - g_free(ch->rules);
> + /* rules were allocated by usbredirparser */
> + free(ch->rules);
> }
>
> g_free(ch);
> --
> 2.20.1
>
> _______________________________________________
> Spice-devel mailing list
> Spice-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/spice-devel
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