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Do not send more descriptor bytes than we have

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The request may be for more bytes than our descriptor has. Do not
send more when asked for more.
This commit is contained in:
Raphael Assenat 2017-11-19 14:40:53 -05:00
parent 05b47f9967
commit e7426e684a
1 changed files with 2 additions and 2 deletions
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4
usb.c
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@ -180,7 +180,7 @@ static void buf2EP(uint8_t epnum, const void *src, uint16_t len, uint16_t max_le
*/
static void longDescriptorHelper(const uint8_t *data, uint16_t len, uint16_t rq_len, uint8_t progmem)
{
uint16_t todo = rq_len;
uint16_t todo = rq_len > len ? len : rq_len;
uint16_t pos = 0;
while(1)
@ -208,7 +208,7 @@ static void handleSetupPacket(struct usb_request *rq)
char unhandled = 0;
#ifdef VERBOSE
printf_P(PSTR("t: %02x, rq: 0x%02x, val: %04x, l: %d\r\n"), rq->bmRequestType, rq->bRequest, rq->wValue, rq->wLength);
printf_P(PSTR("t: %02x, rq: 0x%02x, val: %04x, idx: %04x, l: %d\r\n"), rq->bmRequestType, rq->bRequest, rq->wValue, rq->wIndex, rq->wLength);
#endif
if (USB_RQT_IS_HOST_TO_DEVICE(rq->bmRequestType))