mirror of https://github.com/c-ares/c-ares.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
96 lines
3.6 KiB
96 lines
3.6 KiB
5 years ago
|
.\"
|
||
|
|
.\" Copyright 2010 by Ben Greear <greearb@candelatech.com>
|
||
|
|
.\"
|
||
|
|
.\" Permission to use, copy, modify, and distribute this
|
||
|
|
.\" software and its documentation for any purpose and without
|
||
|
|
.\" fee is hereby granted, provided that the above copyright
|
||
|
|
.\" notice appear in all copies and that both that copyright
|
||
|
|
.\" notice and this permission notice appear in supporting
|
||
|
|
.\" documentation, and that the name of M.I.T. not be used in
|
||
|
|
.\" advertising or publicity pertaining to distribution of the
|
||
|
|
.\" software without specific, written prior permission.
|
||
|
|
.\" M.I.T. makes no representations about the suitability of
|
||
|
|
.\" this software for any purpose. It is provided "as is"
|
||
|
|
.\" without express or implied warranty.
|
||
|
|
.\"
|
||
|
|
.TH ARES_SET_SERVERS 3 "5 March 2010"
|
||
|
|
.SH NAME
|
||
|
|
ares_set_servers, ares_set_servers_ports \- Initialize an ares_channel name servers configuration
|
||
|
|
.SH SYNOPSIS
|
||
|
|
.nf
|
||
|
|
.B #include <ares.h>
|
||
|
|
.PP
|
||
|
|
.B int ares_set_servers(ares_channel \fIchannel\fP, struct ares_addr_node *\fIservers\fP)
|
||
|
|
.B int ares_set_servers_ports(ares_channel \fIchannel\fP, struct ares_addr_port_node *\fIservers\fP)
|
||
|
|
.fi
|
||
|
|
.SH DESCRIPTION
|
||
|
|
The \fBares_set_servers(3)\fP function initializes name servers configuration
|
||
|
|
for the channel data identified by
|
||
|
|
.IR channel ,
|
||
|
|
from a
|
||
|
|
.IR servers
|
||
|
|
pointer to a linked list of ares_addr_node structs holding name servers
|
||
|
|
address data.
|
||
|
|
.PP
|
||
|
|
The name server linked list pointer argument may be the result of a previous
|
||
|
|
call to \fBares_get_servers(3)\fP or a linked list of \fBares_addr_node\fP structs
|
||
|
|
set up by other means.
|
||
|
|
.PP
|
||
|
|
The \fBares_set_servers(3)\fP function also allows the specification of UDP and
|
||
|
|
TCP ports to be used for communication on a per-server basis. The provided
|
||
|
|
linked list argument may be the result of a previous call to
|
||
|
|
\fBares_get_servers_ports(3)\fP or a linked list of \fBares_addr_port_node\fP structs
|
||
|
|
set up by other means.
|
||
|
|
.PP
|
||
|
|
This function replaces any potentially previously configured name servers
|
||
|
|
with the ones given in the linked list. So, in order to configure a channel
|
||
|
|
with more than one name server all the desired ones must be specified in a
|
||
|
|
single list.
|
||
|
|
.PP
|
||
|
|
The function does not take ownership of the linked list argument.
|
||
|
|
The caller is responsible for freeing the linked list when no longer needed.
|
||
|
|
.PP
|
||
|
|
This function is capable of handling IPv4 and IPv6 name server
|
||
|
|
addresses simultaneously, rendering \fBares_init_options(3)\fP with
|
||
|
|
optmask \fBARES_OPT_SERVERS\fP functionally obsolete except for
|
||
|
|
IPv4-only name server usage.
|
||
|
|
|
||
|
|
.SH RETURN VALUES
|
||
|
|
.B ares_set_servers(3)
|
||
|
|
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.
|
||
|
|
.TP 15
|
||
|
|
.B ARES_ENOTIMP
|
||
|
|
Changing name servers configuration while queries are outstanding is not implemented.
|
||
|
|
.SH SEE ALSO
|
||
|
|
.BR ares_set_servers_csv (3),
|
||
|
|
.BR ares_get_servers (3),
|
||
|
|
.BR ares_init_options (3),
|
||
|
|
.BR ares_dup(3)
|
||
|
|
.SH AVAILABILITY
|
||
|
|
\fBares_set_servers(3)\fP was added in c-ares 1.7.1;
|
||
|
|
\fBares_set_servers_ports(3)\fP was added in c-ares 1.11.0.
|
||
|
|
.SH AUTHOR
|
||
|
|
Implementation of this function and associated library internals are based
|
||
|
|
on code, comments and feedback provided in November and December of 2008 by
|
||
|
|
Daniel Stenberg, Gregor Jasny, Phil Blundell and Yang Tse, December 2009
|
||
|
|
by Cedric Bail, February 2010 by Jakub Hrozek. On March 2010 Yang Tse
|
||
|
|
shuffled all the bits and this function popped out.
|
||
|
|
.br
|
||
|
|
Copyright 1998 by the Massachusetts Institute of Technology.
|
||
|
|
.br
|
||
|
|
Copyright (C) 2008-2010 by Daniel Stenberg
|