Wireshark mailing list archives
Re: Why tvb_get_bits() assumes Big Endian?
From: Tomasz Moń <desowin () gmail com>
Date: Thu, 30 Jul 2020 17:55:41 +0200
On Thu, Jul 30, 2020 at 3:35 PM Filipe Laíns <lains () archlinux org> wrote:
For this reason I decided to drop it in favor of tvb_get_bits_array + pletoh*. It is simple enough to be used standalone.
This looks like a workaround to me, not a proper solution. To me the bit level order within a single byte seems clear - it's up to the tool that provides data to Wireshark to handle it. Wireshark job starts at the byte (octet) level.
I would actually like to see tvb_get_bits* throw an error on ENC_LITTLE_ENDIAN as it is clearly not supported.
Yes, it would be better to throw an error than to silently assume Big Endian. However, the best would be if it simply worked with ENC_LITTLE_ENDIAN. In fact, if you check the history, you'll notice that the initial implementation did call DISSECTOR_ASSERT_NOT_REACHED(); when called with little endian [1]. [1] https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commitdiff;h=b688f9154aacf9c2f30dc6c715bc115a05e9fcef ___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev () wireshark org> Archives: https://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://www.wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-request () wireshark org?subject=unsubscribe
Current thread:
- Re: Why tvb_get_bits() assumes Big Endian?, (continued)
- Re: Why tvb_get_bits() assumes Big Endian? Jaap Keuter (Jul 29)
- Re: Why tvb_get_bits() assumes Big Endian? Tomasz Moń (Jul 29)
- Re: Why tvb_get_bits() assumes Big Endian? Roland Knall (Jul 30)
- Re: Why tvb_get_bits() assumes Big Endian? Tomasz Moń (Jul 30)
- Re: Why tvb_get_bits() assumes Big Endian? Graham Bloice (Jul 30)
- Re: Why tvb_get_bits() assumes Big Endian? Graham Bloice (Jul 30)
- Re: Why tvb_get_bits() assumes Big Endian? Jaap Keuter (Jul 30)
- Re: Why tvb_get_bits() assumes Big Endian? Tomasz Moń (Jul 29)
- Re: Why tvb_get_bits() assumes Big Endian? Jaap Keuter (Jul 29)
- Re: Why tvb_get_bits() assumes Big Endian? Tomasz Moń (Jul 30)
- Re: Why tvb_get_bits() assumes Big Endian? Jaap Keuter (Jul 30)
- Re: Why tvb_get_bits() assumes Big Endian? Tomasz Moń (Jul 30)
- Re: Why tvb_get_bits() assumes Big Endian? Filipe Laíns (Jul 30)
- Re: Why tvb_get_bits() assumes Big Endian? Tomasz Moń (Jul 30)
- Re: Why tvb_get_bits() assumes Big Endian? John Thacker (Jul 30)