This routine is part of the XTI interfaces which evolved from the TLI interfaces. XTI represents the future evolution of these interfaces. However, TLI interfaces are supported for compatibility. When using a TLI routine that has the same name as an XTI routine, the tiuser.h header file must be used. Refer to the TLI COMPATIBILITY section for a description of differences between the two interfaces.

The t_getstate() function returns the current state of the provider associated with the transport endpoint specified by fd.

State is returned upon successful completion. Otherwise, a value of -1 is returned and t_errno is set to indicate an error. The current state is one of the following:

T_UNBND

Unbound.

T_IDLE

Idle.

T_OUTCON

Outgoing connection pending.

T_INCON

Incoming connection pending.

T_DATAXFER

Data transfer.

T_OUTREL

Outgoing direction orderly release sent.

T_INREL

Incoming direction orderly release received.

If the provider is undergoing a state transition when t_getstate() is called, the function will fail.

On failure, t_errno is set to one of the following:

TBADF

The specified file descriptor does not refer to a transport endpoint.

TPROTO

This error indicates that a communication problem has been detected between XTI and the transport provider for which there is no other suitable XTI error (t_errno).

TSTATECHNG

The transport provider is undergoing a transient state change.

TSYSERR

A system error has occurred during execution of this function.

The XTI and TLI interface definitions have common names but use different header files. This, and other semantic differences between the two interfaces are described in the subsections below.

Interface Header

Error Description Values

See attributes(5) for descriptions of the following attributes:

t_open(3NSL), attributes(5)