usb sniffer setup packet

[Paolo Abeni <paolo.abeni () email it>]

hello,

In the current usb header (<pcap/usb.h>), I defined the usb setup header
as:

typedef struct _usb_setup {
  bpf_u_int32 bmRequestType;
  bpf_u_int32 bRequest;
  bpf_u_int32 wValue;
  bpf_u_int32 wIndex;
  bpf_u_int32 wLength;
} pcap_usb_setup;

I choose the length of each field arbitrary, because in current
implementation each number obtained converting a text string.

Only later I discovered that this header is part of the USB standard
(and not an OS added feature, like I thought) and described in the USB
specification as:

typedef struct _usb_setup {
  u_int8_t bmRequestType;
  u_int8_t bRequest;
  u_int16_t wValue;
  u_int16_t wIndex;
  u_int16_t wLength;
} pcap_usb_setup;

A binary interface for sniffing USB packets is coming, so we will soon
get packets with this header formatted following the standard. The
attached patch change the usb setup struct as the standard tell, it is
worthy ?

Best regards,

Paolo

Attachment: usb_setup_hdr.patch
Description:

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