Differences Between TI-RPC and TS-RPC

The major differences between transport-independent RPC and transport-specific RPC are illustrated in the following table. Also see Comparison Examples for code examples comparing TS-RPC with TI-RPC.

Table 6-1 Differences Between TI-RPC and TS-RPC

Category	TI-RPC	TS-RPC
Default Transport Selection	TI-RPC uses the TLI interface.	TS-RPC uses the socket interface.
RPC Address Binding	TI-RPC uses `rpcbind()` for service binding. `rpcbind()` keeps address in universal address format.	TS-RPC uses `portmap` for service binding.
Transport Information	Transport information is kept in a local file, `/etc/netconfig`. Any transport identified in `netconfig` is accessible.	Only TCP and UDP transports are supported.
Loopback Transports	`rpcbind` service requires a secure loopback transport for server registration.	TS-RPC services do not require a loopback transport.
Host Name Resolution	The order of host-name resolution in TI-RPC depends on the order of dynamic libraries identified by entries in `/etc/netconfig`.	Host-name resolution is done by name services. The order is set by the state of the `hosts` database.
File Descriptors	Descriptors are assumed to be TLI endpoints.	Descriptors are assumed to be sockets.
Libraries	TI-RPC requires that applications be linked to the libnsl library.	All TS-RPC functionality is provided in libc.
MT Support	Multithreaded RPC clients and servers are supported.	Multithreaded RPC is not supported.

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