Wireshark mailing list archives
Re: Hierarchy of fields & offsets
From: Guy Harris <guy () alum mit edu>
Date: Tue, 25 Jul 2017 17:38:03 -0700
On Jul 25, 2017, at 3:26 PM, Sultan, Hassan via Wireshark-dev <wireshark-dev () wireshark org> wrote:
FT_BYTES 198 smb2.security_blob(120) : 60:76:06:06:2b:06:01:05:05:02:a0:6c:30:6a:a0:3c:30:3a:06:0a:2b:06:01:04:01:82:37:02:02:1e:06:09:2a:86:48:82:f7:12:01:02:02:06:09:2a:86:48:86:f7:1 2:01:02:02:06:0a:2a:86:48:86:f7:12:01:02:02:03:06:0a:2b:06:01:04:01:82:37:02:02:0a:a3:2a:30:28:a0:26:1b:24:6e:6f:74:5f:64:65:66:69:6e:65:64:5f:69:6e:5f:52:46:43:34:31:37:38:40:70:6c:65:61:73:65:5f:69:6 7:6e:6f:72:65 FT_UINT32 190 smb2.olb.offset(2) : 0x00000080 FT_UINT32 192 smb2.olb.length(2) : 120 FT_PROTOCOL 198 gss-api(120) : Notice how smb2.olb.offset & smb2.olb.length are under smb2.security_blob, but their offset starts at 190/192 while smb2.security_blob starts at 198
Now we're not just dealing with data structures, we're dealing with pointers.... If the pointer and length are considered part of the "security blob", then the "security blob" needs to have three subfields - offset, length, and content - and therefore must be an FT_NONE and must not be a contiguous blob. That would require that Wireshark support fields with more than one offset/length pair; if you clicked on them, they'd highlight more than one region of the hex pane. If the pointer and length are *not* considered part of the security blob, then they shouldn't be under smb2.security_blob. ___________________________________________________________________________ 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:
- Hierarchy of fields & offsets Sultan, Hassan via Wireshark-dev (Jul 25)
- Re: Hierarchy of fields & offsets Guy Harris (Jul 25)
- Re: "[UNVERIFIED SENDER]Re: Hierarchy of fields & offsets Sultan, Hassan via Wireshark-dev (Jul 25)
- Re: Hierarchy of fields & offsets Guy Harris (Jul 25)
- Re: "[UNVERIFIED SENDER]Re: Hierarchy of fields & offsets Sultan, Hassan via Wireshark-dev (Jul 25)
- Re: "[UNVERIFIED SENDER]Re: Hierarchy of fields & offsets Guy Harris (Jul 25)
- Re: "[UNVERIFIED SENDER]Re: "[UNVERIFIED SENDER]Re: Hierarchy of fields & offsets Sultan, Hassan via Wireshark-dev (Jul 27)
- Re: "[UNVERIFIED SENDER]Re: Hierarchy of fields & offsets Sultan, Hassan via Wireshark-dev (Jul 25)
- Re: Hierarchy of fields & offsets Guy Harris (Jul 25)