void smartcard_char_device_wakeup(SpiceCharDeviceInstance *sin)
{
SmartCardDeviceState* state = SPICE_CONTAINEROF(
sin->st, SmartCardDeviceState, base);
SpiceCharDeviceInterface *sif = SPICE_CONTAINEROF(sin->base.sif, SpiceCharDeviceInterface, base);
VSCMsgHeader *vheader = (VSCMsgHeader*)state->buf;
int n;
int remaining;
while ((n = sif->read(sin, state->buf_pos, state->buf_size - state->buf_used)) > 0) {
state->buf_pos += n;
state->buf_used += n;
if (state->buf_used < sizeof(VSCMsgHeader)) {
continue;
}
if (vheader->length > state->buf_size) {
state->buf_size = MAX(state->buf_size*2, vheader->length + sizeof(VSCMsgHeader));
state->buf = spice_realloc(state->buf, state->buf_size);
ASSERT(state->buf != NULL);
}
if (state->buf_used - sizeof(VSCMsgHeader) < vheader->length) {
continue;
}
smartcard_char_device_on_message_from_device(state, vheader);
remaining = state->buf_used - sizeof(VSCMsgHeader) > vheader->length;
if (remaining > 0) {
memcpy(state->buf, state->buf_pos, remaining);
}
state->buf_pos = state->buf;
state->buf_used = remaining;
}
}
static SpiceCharDeviceMsgToClient *spicevmc_chardev_read_msg_from_dev(SpiceCharDeviceInstance *sin,
void *opaque)
{
SpiceVmcState *state = opaque;
SpiceCharDeviceInterface *sif;
SpiceVmcPipeItem *msg_item;
int n;
sif = SPICE_CONTAINEROF(sin->base.sif, SpiceCharDeviceInterface, base);
if (!state->rcc) {
return NULL;
}
if (!state->pipe_item) {
msg_item = spice_new0(SpiceVmcPipeItem, 1);
msg_item->refs = 1;
red_channel_pipe_item_init(&state->channel,
&msg_item->base, PIPE_ITEM_TYPE_SPICEVMC_DATA);
} else {
spice_assert(state->pipe_item->buf_used == 0);
msg_item = state->pipe_item;
state->pipe_item = NULL;
}
n = sif->read(sin, msg_item->buf,
sizeof(msg_item->buf));
if (n > 0) {
spice_debug("read from dev %d", n);
msg_item->buf_used = n;
return msg_item;
} else {
state->pipe_item = msg_item;
return NULL;
}
}
SpiceCharDeviceMsgToClient *smartcard_read_msg_from_device(SpiceCharDeviceInstance *sin,
void *opaque)
{
SmartCardDeviceState *state = opaque;
SpiceCharDeviceInterface *sif = SPICE_CONTAINEROF(sin->base.sif, SpiceCharDeviceInterface, base);
VSCMsgHeader *vheader = (VSCMsgHeader*)state->buf;
int n;
int remaining;
int actual_length;
while ((n = sif->read(sin, state->buf_pos, state->buf_size - state->buf_used)) > 0) {
MsgItem *msg_to_client;
state->buf_pos += n;
state->buf_used += n;
if (state->buf_used < sizeof(VSCMsgHeader)) {
continue;
}
smartcard_read_buf_prepare(state, vheader);
actual_length = ntohl(vheader->length);
if (state->buf_used - sizeof(VSCMsgHeader) < actual_length) {
continue;
}
msg_to_client = smartcard_char_device_on_message_from_device(state, vheader);
remaining = state->buf_used - sizeof(VSCMsgHeader) - actual_length;
if (remaining > 0) {
memcpy(state->buf, state->buf_pos, remaining);
}
state->buf_pos = state->buf;
state->buf_used = remaining;
if (msg_to_client) {
return msg_to_client;
}
}
return NULL;
}