ares_set_sortlist - Initialize an ares_channel sortlist configuration
int ares_set_sortlist(ares_channel channel, const char *sortstr)
The ares_set_sortlist(3) function initializes an address sortlist
configuration for the channel data identified by channel, so that
addresses returned by ares_gethostbyname(3) are sorted according to the
sortlist. The provided 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, "18.104.22.168/255.255.240.0
This function replaces any potentially previously configured
address sortlist with the ones given in the configuration string.
ares_set_sortlist(3) may return any of the following values:
- The sortlist configuration was successfully initialized.
- The process's available memory was exhausted.
- The channel data identified by channel was invalid.
- c-ares library initialization not yet performed.