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[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>
This commit is contained in:
Jan Engelhardt 2008-01-31 04:06:38 -08:00 committed by David S. Miller
parent 37c08387fc
commit edc26f7aaa
2 changed files with 10 additions and 8 deletions
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4
include/linux/netfilter/xt_owner.h
View File

@ -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;
};

14
net/netfilter/xt_owner.c
View File

@ -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;