Wireshark mailing list archives
Re: smb.time || smb2.time is valid in a filter string but not in a custom column field?
From: Jeff Morriss <jeff.morriss.ws () gmail com>
Date: Fri, 14 Jun 2013 09:27:14 -0400
On 06/13/13 20:46, Guy Harris wrote:
On Jun 13, 2013, at 5:16 PM, Richard Sharpe <realrichardsharpe () gmail com> wrote:I thought I would try to work around my issue with smb.time vs smb2.time by using a custom column field and putting in an expression, but it seems not to work. An expression that is acceptable in the Filter field is not acceptable in a custom column. Why is this?Because "||" is a Boolean "or", not a human-language "or". :-) I.e., "a || b" is a packet-matching expression that matches if the expression "a" matches or the expression "b" matches, not a field expression that evaluates to whichever of the fields "a" or "b" is present (with "a" chosen if both are present, presumably). The Filter field takes packet-matching expressions; the custom column field takes field names. Field names are valid packet-matching expressions, which match if the field is present in the packet and don't match if it's not, but arbitrary packet-matching expressions aren't valid as custom columns. Having a separate feature allowing a set of field names for a custom column could be useful. I'm not sure an "||" operator, given its existing meaning in C (and in packet-matching expressions), would be the right syntax for that.
What would an "or" in the context of columns mean? In particular in the case where both fields have a value.
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Current thread:
- smb.time || smb2.time is valid in a filter string but not in a custom column field? Richard Sharpe (Jun 13)
- Re: smb.time || smb2.time is valid in a filter string but not in a custom column field? Guy Harris (Jun 13)
- Re: smb.time || smb2.time is valid in a filter string but not in a custom column field? Jeff Morriss (Jun 14)
- Re: smb.time || smb2.time is valid in a filter string but not in a custom column field? Richard Sharpe (Jun 14)
- Re: smb.time || smb2.time is valid in a filter string but not in a custom column field? Jeff Morriss (Jun 14)
- Re: smb.time || smb2.time is valid in a filter string but not in a custom column field? Richard Sharpe (Jun 14)
- Re: smb.time || smb2.time is valid in a filter string but not in a custom column field? Joerg Mayer (Jun 14)
- Re: smb.time || smb2.time is valid in a filter string but not in a custom column field? Jeff Morriss (Jun 14)
- Re: smb.time || smb2.time is valid in a filter string but not in a custom column field? Guy Harris (Jun 13)