Enforce size limit when paged searches are enabled

[arianf]

Enforce size limit when paged searches are enabled

Fixes the :size option being ignored when paged searches are enabled and the requested size exceeds 126.

Problem

When paging is enabled and remaining entries needed exceeds 126, the code sets query_limit = 0 (no server-side limit) to avoid conflicts with the page size. However, the limit is never enforced client-side.

The existing code comment acknowledges this:

"(Because we pass zero as the sizelimit on search rounds when the remaining limit is larger than our max page size of 126. In these cases, I think the caller's search limit will be ignored!)"

Solution

Add a client-side check to break the paging loop when the requested size limit is reached:

break if size > 0 && n_results >= size

Related Issues

• Search only returns 126 entries when nsslapd-sizelimit is 126 #437
• Wrong paged result from search #36

Testing

Tested against a production LDAP server with 5900+ entries matching the filter.
Before: all 5900+ returned.
After: exactly 3000 as requested.

Checklist

• Fix applied to lib/net/ldap/connection.rb
• Add unit test for size limit with paged searches
• Update History.rdoc with change summary
• Run full test suite (bundle exec rake)