+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 *addstr = (!validstr) ? NULL : strtok_r(NULL, ",", &saveptr);
+ const char *pclass = NULL;
+
+ 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);
+ return true;
+}
+
+static int
+parse_prefix_list(struct interface *iface, struct blob_attr *attr)
+{
+ struct blob_attr *cur;
+ int n_addr = 0;
+ int rem;
+
+ blobmsg_for_each_attr(cur, attr, rem) {
+ if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
+ return -1;
+
+ n_addr++;
+ if (!parse_prefix_option(iface, blobmsg_data(cur),
+ blobmsg_data_len(cur)))
+ return -1;
+ }
+
+ return n_addr;
+}
+