.\"	$NetBSD: sctp_opt_info.3,v 1.2 2018/08/13 06:00:21 wiz Exp $
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.\"     From: @(#)send.2	8.2 (Berkeley) 2/21/94
.\"
.Dd August 1, 2018
.Dt SCTP_OPT_INFO 3
.Os
.Sh NAME
.Nm sctp_opt_info
.Nd get SCTP socket information
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In sys/types.h
.In sys/socket.h
.In netinet/sctp.h
.Ft int
.Fn sctp_opt_info "int sd" "sctp_assoc_t id" "int opt" "void *arg" "socklen_t *size"
.Sh DESCRIPTION
The
.Fn sctp_opt_info
call provides a multi-os compatible method for getting
specific
.Fn getsockopt
data where an association identification needs to be passed
into the operating system.
For those
who wish to write portable code amongst multiple operating systems
this call should be used for the following SCTP
socket options.
.Pp
.Dv SCTP_RTOINFO
.Pp
.Dv SCTP_ASSOCINFO
.Pp
.Dv SCTP_PRIMARY_ADDR
.Pp
.Dv SCTP_PEER_ADDR_PARAMS
.Pp
.Dv SCTP_DEFAULT_SEND_PARAM
.Pp
.Dv SCTP_MAX_SEG
.Pp
.Dv SCTP_AUTH_ACTIVE_KEY
.Pp
.Dv SCTP_DELAYED_SACK
.Pp
.Dv SCTP_MAX_BURST
.Pp
.Dv SCTP_CONTEXT
.Pp
.Dv SCTP_EVENT
.Pp
.Dv SCTP_DEFAULT_SNDINFO
.Pp
.Dv SCTP_DEFAULT_PRINFO
.Pp
.Dv SCTP_STATUS
.Pp
.Dv SCTP_GET_PEER_ADDR_INFO
.Pp
.Dv SCTP_PEER_AUTH_CHUNKS
.Pp
.Dv SCTP_LOCAL_AUTH_CHUNKS
.Sh RETURN VALUES
The call returns 0 on success and \-1 upon error.
.Sh ERRORS
The
.Fn sctp_opt_info
function can return the following errors:
.Bl -tag -width Er
.It Bq Er EBADF
The argument
.Fa s
is not a valid descriptor.
.It Bq Er EINVAL
The argument
.Fa arg
value was invalid.
.It Bq Er ENOTSOCK
The argument
.Fa s
is not a socket.
.It Bq Er EOPNOTSUPP
The argument
.Fa opt
was not one of the above listed SCTP socket
options.
.El
.Sh SEE ALSO
.Xr getsockopt 2 ,
.Xr getsockopt2 2 ,
.Xr sctp 4
.Rs
.%R RFC
.%N 6458
.%T "Sockets API Extensions for the Stream Control Transmission Protocol (SCTP)"
.%D December 2011
.Re
.Sh HISTORY
This function first appeared in
.Nx 9.0 .