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.TH ARES_SET_SORTLIST 3 "23 November 2015"
.SH NAME
ares_set_sortlist \- Initialize an ares_channel sortlist configuration
.SH SYNOPSIS
.nf
.B #include <ares.h>
.PP
.B int ares_set_sortlist(ares_channel \fIchannel\fP, const char *\fIsortstr\fP)
.fi
.SH DESCRIPTION
The \fBares_set_sortlist(3)\fP function initializes an address sortlist configuration
for the channel data identified by
.IR channel ,
so that addresses returned by \fBares_gethostbyname(3)\fP are sorted according to the
sortlist.  The provided
.IR sortstr
string that holds a space separated list of IP-address-netmask pairs.  The
netmask is optional but follows the address after a slash if present.  For example,
"130.155.160.0/255.255.240.0 130.155.0.0".

This function replaces any potentially previously configured address sortlist
with the ones given in the configuration string.

.SH RETURN VALUES
.B ares_set_sortlist(3)
may return any of the following values:
.TP 15
.B ARES_SUCCESS
The sortlist configuration was successfully initialized.
.TP 15
.B ARES_ENOMEM
The process's available memory was exhausted.
.TP 15
.B ARES_ENODATA
The channel data identified by
.IR channel
was invalid.
.TP 15
.B ARES_ENOTINITIALIZED
c-ares library initialization not yet performed.
.SH SEE ALSO
.BR ares_init_options (3),
.BR ares_dup(3)
.SH AVAILABILITY
ares_set_sortlist(3) was added in c-ares 1.11.0