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Many functions use low-level socket interface for connection or various checks. However, most of the time we don't respect automatic address family detection but rather try to force our values. This may cause either redundat connection tries when an address family is disabled on system tries or even crashes when socket exceptions are not properly caught. Instead of forcing address families to socket, rather use getaddrinfo interface to automatically retrieve a list of all relevant address families and other connection settings when connecting to remote/local machine or binding to a local port. Now, we will also fill correctly all connection parameters like flowinfo and scopeid for IPv6 connections which will for example prevent issues with scoped IPv6 addresses. bind_port_responder function was changed to at first try to bind to IPv6 wildcard address before IPv4 as IPv6 socket is able to accept both IPv4 and IPv6 connections (unlike IPv4 socket). nsslib connection was refactored to use nss.io.AddrInfo class to get all the available connections. Socket is now not created by default in NSSConnection class initializer, but rather when the actual connection is being made, becase we do not an address family where connection is successful. https://fedorahosted.org/freeipa/ticket/2913 https://fedorahosted.org/freeipa/ticket/2695
Ground rules on adding new schema Brand new schema, particularly when written specifically for IPA, should be added in share/*.ldif. Any new files need to be explicitly loaded in ipaserver/install/dsinstance.py. These simply get copied directly into the new instance schema directory. Existing schema (e.g. in an LDAP draft) may either be added as a separate ldif in share or as an update in the updates directory. The advantage of adding the schema as an update is if 389-ds ever adds the schema then the installation won't fail due to existing schema failing to load during bootstrap. If the new schema requires a new container then this should be added to install/bootstrap-template.ldif.