+/*
+ * Check if a wildcard nfs_client record matches the canonical name
+ * or the aliases of a host. Return 1 if a match is found, otherwise
+ * zero.
+ */
+static int
+check_wildcard(const nfs_client *clp, const struct hostent *hp)
+{
+ char *cname = clp->m_hostname;
+ char *hname = hp->h_name;
+ char **ap;
+
+ if (wildmat(hname, cname))
+ return 1;
+
+ /* See if hname aliases listed in /etc/hosts or nis[+]
+ * match the requested wildcard */
+ for (ap = hp->h_aliases; *ap; ap++) {
+ if (wildmat(*ap, cname))
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ * Check if @hp's hostname or aliases fall in a given netgroup.
+ * Return 1 if @hp represents a host in the netgroup, otherwise zero.
+ */
+#ifdef HAVE_INNETGR
+static int
+check_netgroup(const nfs_client *clp, const struct hostent *hp)
+{
+ const char *netgroup = clp->m_hostname + 1;
+ const char *hname = hp->h_name;
+ struct hostent *nhp = NULL;
+ struct sockaddr_in addr;
+ int match, i;
+ char *dot;
+
+ /* First, try to match the hostname without
+ * splitting off the domain */
+ if (innetgr(netgroup, hname, NULL, NULL))
+ return 1;
+
+ /* See if hname aliases listed in /etc/hosts or nis[+]
+ * match the requested netgroup */
+ for (i = 0; hp->h_aliases[i]; i++) {
+ if (innetgr(netgroup, hp->h_aliases[i], NULL, NULL))
+ return 1;
+ }
+
+ /* If hname is ip address convert to FQDN */
+ if (inet_aton(hname, &addr.sin_addr) &&
+ (nhp = gethostbyaddr((const char *)&(addr.sin_addr),
+ sizeof(addr.sin_addr), AF_INET))) {
+ hname = nhp->h_name;
+ if (innetgr(netgroup, hname, NULL, NULL))
+ return 1;
+ }
+
+ /* Okay, strip off the domain (if we have one) */
+ dot = strchr(hname, '.');
+ if (dot == NULL)
+ return 0;
+
+ *dot = '\0';
+ match = innetgr(netgroup, hname, NULL, NULL);
+ *dot = '.';
+
+ return match;
+}
+#else /* !HAVE_INNETGR */
+static int
+check_netgroup(__attribute__((unused)) const nfs_client *clp,
+ __attribute__((unused)) const struct hostent *hp)
+{
+ return 0;
+}
+#endif /* !HAVE_INNETGR */
+