Fix for hardware checksum offloading in SMSC driver.
This also fixes IPv6 support for this particular hardware. Submitted by: Daisuke Aoyama
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39700e098d
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664413a163
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=246196
@ -1009,6 +1009,10 @@ smsc_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error)
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/* Check if RX TCP/UDP checksumming is being offloaded */
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if ((ifp->if_capenable & IFCAP_RXCSUM) != 0) {
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struct ether_header *eh;
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eh = mtod(m, struct ether_header *);
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/* Remove the extra 2 bytes of the csum */
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pktlen -= 2;
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@ -1020,8 +1024,10 @@ smsc_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error)
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* the padding bytes as well. Therefore to be safe we
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* ignore the H/W csum on frames less than or equal to
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* 64 bytes.
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*
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* Ignore H/W csum for non-IPv4 packets.
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*/
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if (pktlen > ETHER_MIN_LEN) {
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if (be16toh(eh->ether_type) == ETHERTYPE_IP && pktlen > ETHER_MIN_LEN) {
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/* Indicate the UDP/TCP csum has been calculated */
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m->m_pkthdr.csum_flags |= CSUM_DATA_VALID;
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