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These functions support the use of LDAP URLs (Uniform Resource Locators).
LDAP URLs look like this:
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ldap://hostport/dn[?attributes[?scope[?filter]]]
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where:
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hostport
- Host name with an optional ":portnumber".
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dn
- Base DN to be used for an LDAP search operation.
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attributes
- Comma separated list of attributes to be retrieved.
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scope
- One of these three strings: base one sub (default=base).
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filter
- LDAP search filter as used in a call to ldap_search(3LDAP).
Here is an example:
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ldap://ldap.itd.umich.edu/c=US?o,description?one?o=umich
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URLs that are wrapped in angle-brackets and/or preceded by "URL:" are also tolerated.
ldap_is_ldap_url() returns a non-zero value if url looks like an LDAP URL (as opposed to some other kind of URL). It can be used as a quick check for an LDAP URL; the ldap_url_parse() function should be used if a more thorough check
is needed.
ldap_url_parse() breaks down an LDAP URL passed in url into its component pieces. If successful, zero is returned, an LDAP URL description is allocated, filled in, and ludpp is set to point to it. See RETURN VALUES for values returned upon error.
ldap_free_urldesc() should be called to free an LDAP URL description that was obtained from a call to ldap_url_parse().
ldap_url_search() initiates an asynchronous LDAP search based on the contents of the url string. This function acts just like ldap_search(3LDAP)
except that many search parameters are pulled out of the URL.
ldap_url_search_s() performs a synchronous LDAP search based on the contents of the url string. This function acts just like ldap_search_s(3LDAP)
except that many search parameters are pulled out of the URL.
ldap_url_search_st() performs a synchronous LDAP URL search with a specified timeout. This function acts just like ldap_search_st(3LDAP)
except that many search parameters are pulled out of the URL.
ldap_dns_to_url() locates the LDAP URL associated with a DNS domain name. The supplied DNS domain name is converted into a distinguished name. The directory entry specified by that distinguished name is searched for a labeledURI attribute. If successful then the corresponding
LDAP URL is returned. If unsuccessful then that entry's parent is searched and so on until the target distinguished name is reduced to only two nameparts. If dns_name is NULL then the environment variable LOCALDOMAIN is used. If attrs is not NULL then
it is appended to the URL's attribute list. If scope is not NULL then it overrides the URL's scope. If filter is not NULL then it is merged with the URL's filter. If an error is encountered then zero is returned, otherwise a string URL is returned.
The caller should free the returned string if it is non-zero.
ldap_dn_to_url() locates the LDAP URL associated with a distinguished name. The number of nameparts in the supplied distinguished name must be provided. The specified directory entry is searched for a labeledURI attribute. If successful then the LDAP URL is returned. If unsuccessful
then that entry's parent is searched and so on until the target distinguished name is reduced to only two nameparts. If an error is encountered then zero is returned, otherwise a string URL is returned. The caller should free the returned string if it is non-zero.
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