ares_set_sortlist - Man Page

#include <ares.h>

int ares_set_sortlist(ares_channel_t *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, "130.155.160.0/255.255.240.0 130.155.0.0".

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:

ARES_SUCCESS

The sortlist configuration was successfully initialized.

ARES_ENOMEM

The process's available memory was exhausted.

ARES_ENODATA

The channel data identified by channel was invalid.

ARES_ENOTINITIALIZED

c-ares library initialization not yet performed.

ares_init_options(3), ares_dup(3)

ares_set_sortlist(3) was added in c-ares 1.11.0

ares_init_options(3).