customizing referral chasing

[Pierangelo Masarati <ando@sys-net.it>]

I need to play with referral chasing in libldap; in detail, I need the 
capability to chase multiple values in an arbitrary order.  According to 
the LDAP data model (draft-ietf-ldapbis-protocol), "any supported URI 
may be used to progress the operation".  I take this sentence as the 
client should expect that whatever URI it contacts, it should be able to 
perform the same operation; e.g. in case of search, it should get the 
same results, or another referral.

My plan is to allow hooking a function, defaulting to ldap_int_refnext( 
LDAP *ld, char **refs, int *i, void *params), that takes the ld pointer, 
optional parameters, the pointer to the beginning of the referral array, 
and a pointer to the current index.  When first called, i == -1, while 
on subsequent calls it contains the value returned by previous calls; on 
return, it contains the index of the selected referral, or -1 to 
terminate scanning the array.

The default function will simply run thru the array, thus preserving the 
original behavior.  To store the new function, I'd design an interface 
analogous to that of ldap_set_rebind_proc().

Comments?

p.


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