+ int64_t pref = (!prefstr) ? 0 : strtoul(prefstr, NULL, 10);
+ int64_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;
+
+ for (; addstr; addstr = strtok_r(NULL, ",", &saveptr)) {
+ char *key = NULL, *val = NULL, *addsaveptr;
+ if (!(key = strtok_r(addstr, "=", &addsaveptr)) ||
+ !(val = strtok_r(NULL, ",", &addsaveptr)))
+ continue;
+
+ if (!strcmp(key, "excluded")) {
+ char *sep = strchr(val, '/');
+ if (!sep)
+ return false;
+
+ *sep = 0;
+ excl_length = atoi(sep + 1);
+
+ if (inet_pton(AF_INET6, val, &excluded) < 1)
+ return false;
+
+ excludedp = &excluded;
+ } else if (!strcmp(key, "class")) {
+ pclass = val;
+ }
+
+ }
+
+
+
+
+ int64_t now = system_get_rtime();
+ time_t preferred_until = 0;
+ if (prefstr && pref != 0xffffffffLL && pref + now <= LONG_MAX)
+ preferred_until = pref + now;
+
+ time_t valid_until = 0;
+ if (validstr && valid != 0xffffffffLL && valid + now <= LONG_MAX)
+ valid_until = valid + now;
+
+ interface_ip_add_device_prefix(iface, &addr, length,
+ valid_until, preferred_until,
+ excludedp, excl_length, pclass);