.\"
.\" Copyright 2010 by Ben Greear <greearb@candelatech.com>
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.\" SPDX-License-Identifier: MIT
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.TH ARES_SET_SERVERS_CSV 3 "30 June 2010"
.SH NAME
ares_set_servers_csv, ares_set_servers_ports_csv \- Set list of DNS servers to be used.
.SH SYNOPSIS
.nf
#include <ares.h>

int ares_set_servers_csv(ares_channel_t *\fIchannel\fP, const char* \fIservers\fP)

int ares_set_servers_ports_csv(ares_channel_t *\fIchannel\fP, const char* \fIservers\fP)
.fi
.SH DESCRIPTION
The \fBares_set_servers_csv\fP and \fBares_set_servers_ports_csv\fPfunctions set
the list of DNS servers that ARES will query.  As of v1.22.0 this function can
be called on an active channel with running queries, previously it would return
ARES_ENOTIMP.

Though not recommended, passing NULL for servers will clear all configured
servers and make an inoperable channel, this may be advantageous for test
simulation but unlikely to be useful in production.

The format of the servers option is:

host[:port][,host[:port]]...

For example:

192.168.1.100,192.168.1.101,3.4.5.6
.PP
The \fBares_set_servers_csv\fP function will ignore any port values specified in
the input string, whereare the \fBares_set_servers_ports_csv\fP function will
apply any specified port values as the UDP and TCP port to be used for that
particular nameserver.

.SH RETURN VALUES
.B ares_set_servers_csv(3)
This function may return any of the following values:
.TP 15
.B ARES_SUCCESS
The name servers 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_set_servers (3)
.SH AVAILABILITY
\fBares_set_servers_csv\fP was added in c-ares 1.7.2;
\fBares_set_servers_ports_csv\fP was added in c-ares 1.11.0.
.SH AUTHOR
Ben Greear