+ route->flags = (v6 ? DEVADDR_INET6 : DEVADDR_INET4);
+ vlist_add(&iface->proto_ip.route, &route->node, route);
+
+ return true;
+}
+
+static bool
+parse_prefix_option(struct interface *iface, const char *str, size_t len)
+{
+ char buf[128] = {0}, *saveptr;
+ if (len > sizeof(buf))
+ return false;
+
+ memcpy(buf, str, len);
+ char *addrstr = strtok_r(buf, "/", &saveptr);
+ if (!addrstr)
+ return false;
+
+ char *lengthstr = strtok_r(NULL, ",", &saveptr);
+ if (!lengthstr)
+ return false;
+
+ char *prefstr = strtok_r(NULL, ",", &saveptr);
+ char *validstr = (!prefstr) ? NULL : strtok_r(NULL, ",", &saveptr);
+ char *excludestr = (!validstr) ? NULL : strtok_r(NULL, ",", &saveptr);
+
+ uint32_t pref = (!prefstr) ? 0 : strtoul(prefstr, NULL, 10);
+ uint32_t valid = (!validstr) ? 0 : strtoul(validstr, NULL, 10);
+
+ uint8_t length = strtoul(lengthstr, NULL, 10), excl_length = 0;
+ if (length < 1 || length > 64)
+ return false;
+
+ struct in6_addr addr, excluded, *excludedp = NULL;
+ if (inet_pton(AF_INET6, addrstr, &addr) < 1)
+ return false;
+
+ if (excludestr) {
+ char *sep = strchr(excludestr, '/');
+ if (!sep)
+ return false;
+
+ *sep = 0;
+ excl_length = atoi(sep + 1);
+
+ if (inet_pton(AF_INET6, excludestr, &excluded) < 1)
+ return false;
+
+ excludedp = &excluded;
+ }