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Re: [Wireshark-dev] Familiar with gtk/sctp_graph_dlg.c?
From: Michael Tüxen <Michael.Tuexen_at_nospam>Date: Tue Apr 26 2011 - 13:29:12 GMT
To: Developer support list for Wireshark <wireshark-dev@wireshark.org>
On Apr 26, 2011, at 2:44 PM, Jakub Zawadzki wrote:
> On Mon, Apr 25, 2011 at 03:02:18PM -0600, Stephen Fisher wrote:
>> dup_list = (guint32 *)(((char *)&sack_header->nr_of_dups)+sizeof(guint16)+(nr*sizeof(struct gaps)));
>
> It seems to be less readable version of:
> dup_list = (guint32 *) &sack_header->gaps[nr];
This code should also point to the right place in memory, assuming
the correct alignment. dup_list is 4 byte aligned if and only if
sack_header is.
Best regards
Michael
>
> (At least on amd64 printed offsets:
> printf("%p %p\n", &sack_header->gaps[nr], (((char *)&sack_header->nr_of_dups)+sizeof(guint16)+(nr*sizeof(struct gaps))));
> are the same)
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