[NETFILTER]: xt_owner: allow matching UID/GID ranges

Add support for ranges to the new revision. This doesn't affect
compatibility since the new revision was not released yet.

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 10 insertions, 8 deletions

diff --git a/include/linux/netfilter/xt_owner.h b/include/linux/netfilter/xt_owner.h
index eacd34efebd5..c84e52cfe415 100644
--- a/include/linux/netfilter/xt_owner.h
+++ b/include/linux/netfilter/xt_owner.h
@@ -8,8 +8,8 @@ enum {
 };
 
 struct xt_owner_match_info {
-        u_int32_t uid;
-        u_int32_t gid;
+        u_int32_t uid_min, uid_max;
+        u_int32_t gid_min, gid_max;
         u_int8_t match, invert;
 };
 
diff --git a/net/netfilter/xt_owner.c b/net/netfilter/xt_owner.c
index d382f9cc38b0..9059c16144c3 100644
--- a/net/netfilter/xt_owner.c
+++ b/net/netfilter/xt_owner.c
@@ -4,8 +4,8 @@
  *
  * (C) 2000 Marc Boucher <marc@mbsi.ca>
  *
- * Copyright © CC Computer Consultants GmbH, 2007
- * Contact: <jengelh@computergmbh.de>
+ * Copyright © CC Computer Consultants GmbH, 2007 - 2008
+ * <jengelh@computergmbh.de>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -102,13 +102,15 @@ owner_mt(const struct sk_buff *skb, const struct net_device *in,
                        (XT_OWNER_UID | XT_OWNER_GID)) == 0;
 
         if (info->match & XT_OWNER_UID)
-                if ((filp->f_uid != info->uid) ^
-                    !!(info->invert & XT_OWNER_UID))
+                if ((filp->f_uid >= info->uid_min &&
+                    filp->f_uid <= info->uid_max) ^
+                    !(info->invert & XT_OWNER_UID))
                         return false;
 
         if (info->match & XT_OWNER_GID)
-                if ((filp->f_gid != info->gid) ^
-                    !!(info->invert & XT_OWNER_GID))
+                if ((filp->f_gid >= info->gid_min &&
+                    filp->f_gid <= info->gid_max) ^
+                    !(info->invert & XT_OWNER_GID))
                         return false;
 
         return true;