+ s = set_new(ðer_addr_hash_ops);
+ if (!s)
+ return log_oom();
+
+ for (;;) {
+ _cleanup_free_ char *word = NULL;
+ _cleanup_free_ struct ether_addr *n = NULL;
+
+ r = extract_first_word(&p, &word, NULL, 0);
+ if (r == 0)
+ break;
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ n = new(struct ether_addr, 1);
+ if (!n)
+ return log_oom();
+
+ r = ether_addr_from_string(word, n);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring: %s", word);
+ continue;
+ }
+
+ r = set_put(s, n);
+ if (r < 0)
+ return log_oom();
+ if (r > 0)
+ n = NULL; /* avoid cleanup */
+ }
+
+ r = set_ensure_allocated(hwaddrs, ðer_addr_hash_ops);
+ if (r < 0)
+ return log_oom();
+
+ r = set_move(*hwaddrs, s);
+ if (r < 0)
+ return log_oom();