t_listen(3xti)t_listen(3xti)Namet_listen - listen for a connect request
Syntax
#include <xti.h>
int t_listen(fd, call)
int fd;
struct t_call *call;
Arguments
fd Identifies the local transport endpoint where the connect
indication arrived.
call Contains information describing the connect indication. The
call points to a t_call structure which contains the follow‐
ing members:
struct netbuf addr;
struct netbuf opt;
struct netbuf udata;
int sequence;
The members of the t_call structure have the following mean‐
ings:
addr Returns the protocol address of the calling
transport user.
udata Returns any user data sent by the caller on the
connect request.
sequence Identifies the returned connect indication with a
unique number. The value of sequence enables the
user to listen for multiple connect indications
before responding to any of them.
Because this function returns values for the addr, opt, and
udata fields of call, the maxlen field of each must be set
before issuing the to indicate the maximum size of the buffer
for each.
Description
This function listens for a connect request from a calling transport
user. The fd identifies the local transport endpoint where connect
indications arrive. On return, call contains information describing the
connect indication.
By default, executes in synchronous mode and waits for a connect indic‐
tion to arrive before returning to the user. However, if O_NONBLOCK is
set by means of or executes asynchronously, reducing to a poll for
existing connect indications. If none are available, it returns -1 and
sets to [TNODATA].
──────────────────────────────────────────────
Parameters Before Call After Call
──────────────────────────────────────────────
fd x /
call->addr.maxlen x /
call->addr.len / x
call->addr.buf x (x)
call->opt.maxlen x /
call->opt.len / x
call->opt.buf x (x)
call->udata.maxlen x /
call->udata.len / x
call->udata.buf x (?)
call->sequence / x
──────────────────────────────────────────────
Return Values
Upon successful completion, a value of 0 is returned. On failure, a
value of -1 is returned, and t_errno is set to indicate the error.
Diagnostics
On failure, t_errno is set to one of the following:
[TBADF] The specified file descriptor does not refer to a
transport endpoint.
[TOUTSTATE] The function was issued in the wrong sequence on
the transport endpoint referenced by fd.
[TBADQLEN] The qlen of the endpoint referenced by fd is zero.
[TBUFOVFLW] The number of bytes allocated for an incoming argu‐
ment is not sufficient to store the value of that
argument. The provider's state, as seen by the
user, changes to T_INCON, and the connect indica‐
tion information to be returned in call is dis‐
carded. The value of sequence returned can be used
to do a
[TNODATA] O_NONBLOCK was set, but no connect indications had
been queued.
[TLOOK] An asynchronous event has occurred on the transport
endpoint and requires immediate attention.
[TNOTSUPPORT] This function is not supported by the underlying
transport provider.
[TSYSERR] A system error has occurred during execution of
this function.
See Alsofcntl(2), t_accept(3xti), t_alloc(3xti), t_bind(3xti), t_connect(3xti),
t_open(3xti), t_optmgmt(3xti), t_rcvconnect(3xti)t_listen(3xti)