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Re: Wireshark lua (wslua) and bit fields - how to do it?
From: Tony Trinh <tony19 () gmail com>
Date: Mon, 25 Oct 2010 16:53:02 -0400
No problem. I think I can better help you if you outlined the spec for the 64-bit field and told me what exactly you wanted to do with it, but I'll try to help based on what you've told me so far... Currently, masking a uint64 does not work (at least I couldn't do it on my machine). You can only mask an int up to 32 bits. So, you would have to define two 32-bit fields and adjust the masks accordingly. For your most recent example, you can do something like: -- 24-bit integer in upper 32 bits of 64-bit flags fields.shred_foo = ProtoField.uint32("shred.foo", "Foo field", base.DEC, nil, 0x00FFFFFF) -- read-only bit at bit 1 of 64-bit flags fields.shred_rd = ProtoField.bool("shred.rd", "Read only", base.DEC, nil, 0x02) [...] local OFFSET_FLAGS = offset+8 local OFFSET_FLAGS_LSB = OFFSET_FLAGS+7 subtree:add(fields.shred_foo, buf(OFFSET_FLAGS, 4)) subtree:add(fields.shred_rd, buf(OFFSET_FLAGS_LSB, 1)) ___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-request () wireshark org?subject=unsubscribe
Current thread:
- Re: Wireshark lua (wslua) and bit fields - how to do it? Tony Trinh (Oct 23)
- Re: Wireshark lua (wslua) and bit fields - how to do it? Daniel Lynes (Oct 25)
- Re: Wireshark lua (wslua) and bit fields - how to do it? Tony Trinh (Oct 25)
- Re: Wireshark lua (wslua) and bit fields - how to do it? Daniel Lynes (Oct 28)
- Re: Wireshark lua (wslua) and bit fields - how to do it? Tony Trinh (Oct 28)