From 102e356db79e993614e9b3f47c874fb6d1e67494 Mon Sep 17 00:00:00 2001
From: Gerhard Rieger <gerhard@dest-unreach.org>
Date: Wed, 15 Oct 2008 22:50:25 +0200
Subject: [PATCH] prepared code for generic xiocheckrange

---
 xio-socket.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/xio-socket.c b/xio-socket.c
index b924f66..a28710f 100644
--- a/xio-socket.c
+++ b/xio-socket.c
@@ -1671,6 +1671,8 @@ int xiodopacketinfo(struct msghdr *msgh, bool withlog, bool withenv) {
 }
 
 
+/* check if peer address is within permitted range.
+   return >= 0 if so. */
 int xiocheckrange(union sockaddr_union *sa, struct xiorange *range) {
    switch (sa->soa.sa_family) {
 #if WITH_IP4
@@ -1683,6 +1685,18 @@ int xiocheckrange(union sockaddr_union *sa, struct xiorange *range) {
       return
 	 xiocheckrange_ip6(&sa->ip6, range);
 #endif /* WITH_IP6 */
+#if 0
+   case PF_UNSPEC:
+     {
+      socklen_t i;
+      for (i = 0; i < sizeof(sa->soa.sa_data); ++i) {
+	 if ((range->netmask.soa.sa_data[i] & sa->soa.sa_data[i]) != range->netaddr.soa.sa_data[i]) {
+	    return -1;
+	 }
+      }
+      return 0;
+     }
+#endif
    }
    return -1;
 }