NAME

       ares_get_servers,  ares_get_servers_ports  -  Retrieve  name  servers  from an initialized
       ares_channel

SYNOPSIS

       #include <ares.h>

       int ares_get_servers(ares_channel channel, struct ares_addr_node **servers)
       int ares_get_servers_ports(ares_channel channel, struct ares_addr_port_node **servers)

DESCRIPTION

       The ares_get_servers(3) function retrieves name servers  configuration  from  the  channel
       data  identified  by channel, as a linked list of ares_addr_node structs storing a pointer
       to the first node at the address specified by servers.

       The ares_get_servers_ports(3) function also retrieves any per-server port information that
       may have been previously configured, returning a linked list of ares_addr_port structures.

       Function  caller may traverse the returned name server linked list, or may use it directly
       as suitable input for the ares_set_servers(3) / ares_set_servers_ports(3)  functions,  but
       shall not shrink or extend the list on its own.

       Each  node  of  the  name server linked list is stored in memory dynamically allocated and
       managed by c-ares. It is the caller's responsibility to free the  resulting  linked  list,
       using ares_free_data(3) , once the caller does not need it any longer.

       This  function  is capable of handling IPv4 and IPv6 name server addresses simultaneously,
       rendering ares_save_options(3) with optmask ARES_OPT_SERVERS functionally obsolete  except
       for IPv4-only name server usage.

RETURN VALUES

       This function may return any of the following values:

       ARES_SUCCESS   The name servers configuration was successfully retrieved

       ARES_ENOMEM    The memory was exhausted

       ARES_ENODATA   The channel data identified by channel was invalid.

SEE ALSO

       ares_set_servers(3), ares_init_options(3), ares_save_options(3)

AVAILABILITY

       ares_get_servers(3)  was  added in c-ares 1.7.1; ares_get_servers_ports(3) was added in c-
       ares 1.11.0.

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.
       Copyright 1998 by the Massachusetts Institute of Technology.
       Copyright (C) 2008-2010 by Daniel Stenberg

                                           5 March 2010                       ARES_GET_SERVERS(3)