+ /*
+ * Now construct the full netmask bitmask in a sockaddr_in6,
+ * and plant it in the nfs_client record.
+ */
+ for (i = 0; prefixlen > 32; i++) {
+ sin6.sin6_addr.s6_addr32[i] = 0xffffffff;
+ prefixlen -= 32;
+ }
+ shift = 32 - (uint32_t)prefixlen;
+ sin6.sin6_addr.s6_addr32[i] = htonl((uint32_t)~0 << shift);
+ set_addrlist_in6(clp, 1, &sin6);
+
+ return 1;
+
+out_badmask:
+ xlog(L_ERROR, "Invalid netmask `%s' for %s", slash + 1, clp->m_hostname);
+ return 0;
+
+out_badprefix:
+ xlog(L_ERROR, "Invalid prefix `%s' for %s", slash + 1, clp->m_hostname);
+ return 0;
+}
+#else /* IPV6_SUPPORTED */
+static int
+init_netmask6(nfs_client *UNUSED(clp), const char *UNUSED(slash))
+{
+}
+#endif /* IPV6_SUPPORTED */
+
+/*
+ * Parse the network mask for M_SUBNETWORK type clients.
+ *
+ * Return TRUE if successful, or FALSE if some error occurred.
+ */
+static int
+init_subnetwork(nfs_client *clp)
+{
+ struct addrinfo *ai;
+ sa_family_t family;
+ int result = 0;
+ char *slash;
+
+ slash = strchr(clp->m_hostname, '/');
+ if (slash != NULL) {
+ *slash = '\0';
+ ai = host_pton(clp->m_hostname);
+ *slash = '/';
+ } else
+ ai = host_pton(clp->m_hostname);
+ if (ai == NULL) {
+ xlog(L_ERROR, "Invalid IP address %s", clp->m_hostname);
+ return result;
+ }
+
+ set_addrlist(clp, 0, ai->ai_addr);
+ family = ai->ai_addr->sa_family;
+
+ freeaddrinfo(ai);
+
+ switch (family) {
+ case AF_INET:
+ result = init_netmask4(clp, slash);
+ break;
+ case AF_INET6:
+ result = init_netmask6(clp, slash);
+ break;
+ default:
+ xlog(L_ERROR, "Unsupported address family for %s",
+ clp->m_hostname);
+ }
+
+ return result;