t_unitdata_ind.7

7号信令功能代码,为开源代码

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.so lis.macros
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bracket-label "\fR[\fB" "\fR]" "\fR, \fB"
no-default-database
database lis.refs
accumulate
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abbreviate A
join-authors ", " ", " " and "
et-al " et al" 2 3
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.\"
.\"
.TH T_UNITDATA_IND 7 "2004/01/12 23:45:25" "LiS-2_16_18-8" "Transport Provider Interface (TPI)"
.SH NAME
.B T_UNITDATA_IND
\- Unitdata Indication
.SH SYNOPSIS
This message consists of one
.B M_PROTO
message block followed by zero or more
.B M_DATA
message blocks where each
.B M_DATA
message block contains at least one byte of data.  The format of the
.B M_PROTO
message block is as follows:
.sp
.nf
\fC\s-1\
struct T_unitdata_ind {
    t_scalar_t   PRIM_type;      /* Always T_UNITDATA_IND */
    t_scalar_t   SRC_length;
    t_scalar_t   SRC_offset;
    t_scalar_t   OPT_length;
    t_scalar_t   OPT_offset;
};
\fR\s+1
.fi
.SH DESCRIPTION
This primitive indicates to the transport user that a datagram has been
received from the specified source address.
.SH PARAMETERS
.TP 16
.I PRIM_type
identifies the primitive type.
.TP
.I SRC_length
is the length of the source address.
.TP
.I SRC_offset
is the offset (from the beginning of the
.B M_PROTO
message block) where the source address begins. 
.TP
.I OPT_length
is the length of the requested options associated with the primitive.
.TP
.I OPT_offset
is the offset (from the beginning of the
.B M_PROTO
message block) of the requested options associated with the primitive. 
.PP
The proper alignment of the source address and options in the M_PROTO message
block is not guaranteed. 
.SH MODES
Only connectionless-mode.
.SH ORIGINATOR
Transport provider.
.SH "SEE ALSO"
.BR T_UNITDATA_REQ (7),
.BR T_UDERROR_IND (7).
.SH VERSIONS
.PP
This manpage was written for
.B LiS\c
.
.[
LiS
.]
.br
The Transport Provider Interface first appeared in SVR 4.
.[
svr4
.]
.br
This interface conforms to TPI Version 2, Draft 2.
.XX
.[
TPI Revision 2.0.0
.]
.[
magic
.]
.[
advprog
.]
.[
$LIST$
.]
.T2