Full_Name: Stef Walter Version: 2.4.35 OS: Fedora 19 URL: ftp://ftp.openldap.org/incoming/stef-walter-130912.patch Submission from: (NULL) (46.5.2.70)
Connectionless LDAP (ie: cldap enabled with -DLDAP_CONNECTIONLESS) is broken for IPv6 for current versions of openldap. Tested with version 2.4.35
It's not clear if this ever worked properly.
Connections immediately fail with:
ldap_search_ext: Can't contact LDAP server (-1)
The reason for this is that the LDAP_CONNECTIONLESS buffers include a prefix containing an address in a "struct sockaddr". However, struct sockaddr, is not a concrete type. In particular struct sockaddr_in6 is longer than struct sockaddr.
Noted here: http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=blob;f=libraries/l...
So this leads to failures when using IPv6 as the code assumes that the address length is equal to sizeof (struct sockaddr). Seen here:
http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=blob;f=libraries/l...
Example command:
$ ldapsearch -d -1 -LL -H 'cldap://[2620:52:0:2223::1:1]' -b '' -s base '(&(DnsDomain=ad.baseos.qe)(NtVer=\06\00\00\00))' NetLogon
Output will contain this:
ldap_write: want=96 error=Invalid argument
Which is the EINVAL resulting from bad value passed to sendto().