t_listen(3xti) [ultrix man page]
t_listen(3xti) t_listen(3xti) Name t_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 following mem- bers: struct netbuf addr; struct netbuf opt; struct netbuf udata; int sequence; The members of the t_call structure have the following meanings: 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 indiction 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 argument 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 indication information to be returned in call is discarded. 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 Also fcntl(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)
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t_rcvconnect(3xti) t_rcvconnect(3xti) Name t_rcvconnect - receive the confirmation from a connect request Syntax #include <xti.h> int t_rcvconnect(fd, call) int fd; struct t_call *call; Arguments fd Identifies the local transport endpoint where communications is established. call Contains information associated with the newly established connection. Call points to a t_call structure that contains the fol- lowing members: struct netbuf addr; struct netbuf opt; struct netbuf udata; int sequence; The members of the t_call structure have the following meanings: addr Returns the protocol address associated with the responding transport endpoint. opt Presents any protocol-specific information associated with the transport endpoint. udata Points to any optional user data that may be returned by the destination transport user during connection establish- ment. sequence Has no meaning for this function. Description This function enables a calling transport user to determine the status of a previously sent connect request. Is used in conjunction with to establish a connection in asynchronous mode. The connection is established on successful completion of this function. The maxlen field of each argument must be set before issuing this function to indicate the maximum size of the buffer for each. However, call can be NULL, in which case no information is given to the user on return from By default, executes in synchronous mode and waits for the connection to be established before returning. On return, the addr, opt, and udata fields reflect values associated with the connec- tion. ---------------------------------------------- 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 / / ---------------------------------------------- If O_NONBLOCK is set by means of or executes in asynchronous mode and reduces to a poll for existing connect confirmations. If none is available, fails and returns immediately without waiting for the connection to be established. The function must be reissued at a later time to complete the connection establishment phase and retrieve the information returned to call. 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, is set to one of the following: [TBADF] The specified file descriptor does not refer to a transport endpoint. [TBUFOVFLW] The number of bytes allocated for an incoming argument is not sufficient to store the value of that argument. The con- nect information to be returned in call is discarded. The provider's state, as seen by the user, is changed to DATAXFER. [TNODATA] O_NONBLOCK was set, but a connect confirmation has not yet arrived. [TLOOK] An asynchronous event has occurred on the transport connection and requires immediate attention. [TNOTSUPPORT] This function is not supported by the underlying transport provider. [TOUTSTATE] The function was issued in the wrong sequence on the transport endpoint referenced by fd. [TSYSERR] A system error has occurred during execution of this function. See Also t_accept(3xti), t_alloc(3xti), t_bind(3xti), t_connect(3xti), t_listen(3xti), t_open(3xti), t_optmgmt(3xti) t_rcvconnect(3xti)