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ARES_GET_SERVERS(3) Library Functions Manual ARES_GET_SERVERS(3) NAME ares_get_servers, ares_get_servers_ports - Retrieve name servers from an initialized ares_channel (deprecated) SYNOPSIS #include <ares.h> int ares_get_servers(const ares_channel_t *channel, struct ares_addr_node **servers) int ares_get_servers_ports(const ares_channel_t *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 ad- dress 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 dynami- cally allocated and managed by c-ares. It is the caller's responsibil- ity 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 ad- dresses 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 re- trieved 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. NOTES As of c-ares 1.24, these functions are deprecated due to their lack of ability to store the entire server configuration. Use ares_get_servers_csv(3). 5 March 2010 ARES_GET_SERVERS(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | AVAILABILITY | NOTES
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