ares_save_options - Save configuration values obtained from initialized
int ares_save_options(ares_channel channel, struct ares_options *options, int *optmask)
function saves the channel data identified by
, into the options struct identified by options
saves the mask of options which are set to the integer pointer (passed by
reference) identified by optmask
The resultant options and optmask are then able to be passed directly to
ares_init_options. When the options are no longer needed, ares_destroy_options
should be called to free any associated memory.
can return any of the following values:
- The channel data was successfully stored
- The memory was exhausted
- The channel data identified by channel were
Since c-ares 1.6.0 the ares_options struct has been "locked" meaning
that it won't be extended to cover new functions. This function will remain
functioning, but it can only return config data that can be represented in
this config struct, which may no longer be the complete set of config options.
will not have that restriction.
The ares_options struct can not handle potential IPv6 name servers the
ares_channel might be configured to use. The ares_save_options(3)
function will only return IPv4 servers, if any. In order to retrieve all name
servers an ares_channel might be using, the ares_get_servers(3)
function must be used instead.
ares_save_options(3) was added in c-ares 1.4.0
Copyright 1998 by the Massachusetts Institute of Technology.