_SD_BEGIN_DECLARATIONS;
-/* Get state from ifindex. Possible states: unknown, unmanaged, failed, configuring, configured */
-int sd_network_get_link_state(unsigned index, char**state);
+/* Get state from ifindex.
+ * Possible states: failed, configuring, configured, unmanaged
+ * Possible return codes:
+ * -ENODATA: networkd is not aware of the link
+ * -EBUSY: udev is still processing the link, networkd does not yet know if it will manage it
+ */
+int sd_network_get_link_state(int ifindex, char **state);
+
+/* Get operatinal state from ifindex.
+ * Possible states: unknown, dormant, carrier, degraded, routable
+ * Possible return codes:
+ * -ENODATA: networkd is not aware of the link
+ */
+int sd_network_get_link_operational_state(int ifindex, char **state);
+
+/* Get overall opeartional state
+ * Possible states: unknown, dormant, carrier, degraded, routable
+ * Possible return codes:
+ * -ENODATA: networkd is not aware of any links
+ */
+int sd_network_get_operational_state(char **state);
/* Get DHCPv4 lease from ifindex. */
-int sd_network_get_dhcp_lease(unsigned index, sd_dhcp_lease **ret);
+int sd_network_get_dhcp_lease(int ifindex, sd_dhcp_lease **ret);
+
+/* Indicates whether or not LLMNR should be enabled for the link
+ * Possible levels of support: yes, no, resolve
+ * Possible return codes:
+ * -ENODATA: networkd is not aware of the link*/
+int sd_network_get_llmnr(int ifindex, char **llmnr);
+
+/* Get DNS entries for a given link. These are string representations of
+ * IP addresses */
+int sd_network_get_dns(int ifindex, char ***addr);
-/* Get all network interfaces' indices, and store them in *indices. Returns
- * the number of indices. If indices is NULL, only returns the number of indices. */
-int sd_network_get_ifindices(unsigned **indices);
+/* Get NTP entries for a given link. These are domain names or string
+ * reperesentations of IP addresses */
+int sd_network_get_ntp(int ifindex, char ***addr);
/* Monitor object */
typedef struct sd_network_monitor sd_network_monitor;
-/* Create a new monitor. Category must be NULL. */
-int sd_network_monitor_new(const char *category, sd_network_monitor** ret);
+/* Create a new monitor. Category must be NULL, "links" or "leases". */
+int sd_network_monitor_new(sd_network_monitor **ret, const char *category);
/* Destroys the passed monitor. Returns NULL. */
sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m);