Porting Issues

libnsl Library

libc no longer includes networking functions. libnsl must be explicitly specified at compile time to link the network services routines.

Old Interfaces

Many old interfaces are supported in the libnsl library, but they work only with TCP or UDP transports. To take advantage of new transports, you must use the new interfaces.

Name-to-Address Mapping

Transport independence requires opaque addressing. This has implications for applications that interpret addresses.