Re: usb sniffer setup packet

["ronnie sahlberg" <ronniesahlberg () gmail com>]

Since only 4 such capture files are known to exist as of today, it is
probably better to do the change sooner than later.

Paolo,
you will also need to generate new example captures for the wireshark
wiki as well as a patch to update wireshark asap and if this pcap
patch is accepted.

The wireshark patch is somewhat urgent since there will likely be a
new wireshark release very very soon and it would be very good to do
this change before then.

best regards
ronnie s


On 10/11/06, Paolo Abeni <paolo.abeni () email it> wrote:
> 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
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