diff options
Diffstat (limited to 'wiretap/wtap.h')
| -rw-r--r-- | wiretap/wtap.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/wiretap/wtap.h b/wiretap/wtap.h index 0f17d9ea11..5995d97e94 100644 --- a/wiretap/wtap.h +++ b/wiretap/wtap.h @@ -641,6 +641,12 @@ struct catapult_dct2000_phdr * above. * * See linux/Documentation/usb/usbmon.txt and libpcap/pcap/usb.h for details. + * + * With WTAP_ENCAP_USB_LINUX, packets have the 48-byte header; with + * WTAP_ENCAP_USB_LINUX_MMAPPED, they have the 64-byte header. There + * is no indication of whether the header has the "struct iso_rec", or + * whether the last 16 bytes of a 64-byte header are all zeros or are + * a "struct linux_usb_phdr_ext". */ /* |