+static int network_get_in_addr(const char *key, unsigned index, struct in_addr **addr) {
+ _cleanup_free_ char *p = NULL, *s = NULL;
+ int r;
+
+ assert_return(index, -EINVAL);
+ assert_return(addr, -EINVAL);
+
+ if (asprintf(&p, "/run/systemd/netif/links/%u", index) < 0)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, key, &s, NULL);
+ if (r < 0)
+ return r;
+ else if (!s)
+ return -EIO;
+
+ return deserialize_in_addrs(addr, s);
+}
+
+_public_ int sd_network_get_dns(unsigned index, struct in_addr **addr) {
+ return network_get_in_addr("DNS", index, addr);
+}
+
+_public_ int sd_network_get_ntp(unsigned index, struct in_addr **addr) {
+ return network_get_in_addr("NTP", index, addr);
+}
+
+static int network_get_in6_addr(const char *key, unsigned index, struct in6_addr **addr) {
+ _cleanup_free_ char *p = NULL, *s = NULL;
+ int r;
+
+ assert_return(index, -EINVAL);
+ assert_return(addr, -EINVAL);
+
+ if (asprintf(&p, "/run/systemd/netif/links/%u", index) < 0)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, key, &s, NULL);
+ if (r < 0)
+ return r;
+ else if (!s)
+ return -EIO;
+
+ return deserialize_in6_addrs(addr, s);
+}
+
+_public_ int sd_network_get_dns6(unsigned index, struct in6_addr **addr) {
+ return network_get_in6_addr("DNS", index, addr);
+}
+
+_public_ int sd_network_get_ntp6(unsigned index, struct in6_addr **addr) {
+ return network_get_in6_addr("NTP", index, addr);
+}
+
+static int network_get_boolean(const char *key, unsigned index) {
+ _cleanup_free_ char *p = NULL, *s = NULL;
+ int r;
+
+ assert_return(index, -EINVAL);
+
+ if (asprintf(&p, "/run/systemd/netif/links/%u", index) < 0)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, key, &s, NULL);
+ if (r < 0)
+ return r;
+ else if (!s)
+ return false;
+
+ return parse_boolean(s);
+}
+
+_public_ int sd_network_dhcp_use_dns(unsigned index) {
+ return network_get_boolean("DHCP_USE_DNS", index);
+}
+
+_public_ int sd_network_dhcp_use_ntp(unsigned index) {
+ return network_get_boolean("DHCP_USE_NTP", index);
+}
+