Delete one value of multiple attribute(Class)
okischuang at outlook.com
Wed Jul 17 12:29:10 CEST 2013
Okis Chuang wrote:
> Actually I can write a short perl script to do this, but I try to do
> with pure unlang.
Unlang is not really intended to do that.
> In fact, the reason why I need this function is that sometimes we treat
> some attributes as temporary variable for generating another attribute
> value pair.
Use Tmp-String-0, or Tmp-Octets-0 instead. That way the problem goes
away. See "dictionary.freeradius.internal" for more examples.
> Then erase it before sending request or reply out. So I am wondering
> would majority of FR user do this things like this?
And you don't need to erase the Tmp-* attributes before sending a
packet. They will *never* show up in a packet.
Thanks for reply.
Yes, I totally can understand the solution you recommend, and I've been
using this skill for quite a long time.
But the situation I encountered is :
1. I need to save some information returned in Access-Accept from
external AAA in the attribute *Class* at the section *post-auth*. So it will
return back to gateway.
2. Then gateway will send Accounting-Start to my server. In this time, I
need to pop out the information I saved in the attribute *Class* in the
section *accounting* so that I can generate the avp what I need.
Hence, it cannot work by using Tmp-XXX internal attribute because those two
events occur in two different sessions to FreeRADIUS.
I thought Tmp-* attributes will not exist across two sessions at the same
So that way I must choose some kind of attribute that gateway must return
back for saving temporary attribute value.
Concerning about total available length of Class in our wifi gateway, I
don't want to do such a waste on attribute Class.
Again, just like I said before, because Class is a multi-value attribute I
can't find a way to remove a specific value from entire Class array.
But anyway, if this is too much for unlang I can use perl to fulfill this
definitely. Just curious about if unlang can totally achieve this. :P
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