+int config_parse_dhcp_black_listed_ip_address(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ Network *network = data;
+ const char *p;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ if (isempty(rvalue)) {
+ network->dhcp_black_listed_ip = set_free(network->dhcp_black_listed_ip);
+ return 0;
+ }
+
+ for (p = rvalue;;) {
+ _cleanup_free_ char *n = NULL;
+ union in_addr_union ip;
+
+ r = extract_first_word(&p, &n, NULL, 0);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Failed to parse DHCP black listed ip address, ignoring assignment: %s",
+ rvalue);
+ return 0;
+ }
+ if (r == 0)
+ return 0;
+
+ r = in_addr_from_string(AF_INET, n, &ip);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "DHCP black listed ip address is invalid, ignoring assignment: %s", n);
+ continue;
+ }
+
+ r = set_ensure_allocated(&network->dhcp_black_listed_ip, NULL);
+ if (r < 0)
+ return log_oom();
+
+ r = set_put(network->dhcp_black_listed_ip, UINT32_TO_PTR(ip.in.s_addr));
+ if (r == -EEXIST) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "DHCP black listed ip address is duplicated, ignoring assignment: %s", n);
+ continue;
+ }
+ if (r < 0)
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Failed to store DHCP black listed ip address '%s', ignoring assignment: %m", n);
+ }
+
+ return 0;
+}
+