[Devel] Re: [Users] BRANCH route support

Iqbal iqbal at gigo.co.uk
Tue Aug 23 20:13:56 CEST 2005

So as a user, how would/could I use this


Bogdan-Andrei Iancu wrote:

> Hi everybody,
> I just finished adding support for BRANCH routes. The idea and frame 
> were partial ported from SER (thanks to Juha for extracting and 
> adapting patches). For those who are not familiar with this concept: 
> branch route is a route to be execute separately for each branch 
> before being sent out - changes in that route should reflect only on 
> that branch.
> I say partial because the features, implementation were improved. 
> Shortly here is a list:
>    - remove from grammar default BRANCH ROUTE definition - since this 
> is a 100% TM route, make no sense
>    - RURI may be changed from a branch route (the routing will 
> accordingly change); This capability is essential, since there are 
> core function which alter the RURI, functions which cannot be blocked 
> in specific route types - not handling this, may easyly lead to memory 
> faults or leaks.
>    - flags per branch - if flags are changed in branch_route, the 
> change will not be visible for other branches, but it will be visible 
> for all replies of that branch (it might be useful for per branch NAT 
> traversal)
>    - full AVP support in branch route
>    - more efficient handling of lumps (changes in request) - instead 
> of cloning and removing the entire lump tree for each branch, using 
> lump flags, after each branch, the original lump tree will be just 
> cleaned only what was added during branch route will be removed).
> still pending: how to handle append_branch() core function.....I will 
> prefer to handle properly all core functions, since their execution 
> cannot be banned from specific routes.
> For the moment only textops, avpops and xlog modules were enabled for 
> branch route. Other will come in the future.
> regards,
> Bogdan
>      PS: testing done only superficial (is quite late now).....any 
> help/reports are welcomed :D
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