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Diffstat (limited to 'net/netfilter/xt_MARK.c')
-rw-r--r--net/netfilter/xt_MARK.c158
1 files changed, 112 insertions, 46 deletions
diff --git a/net/netfilter/xt_MARK.c b/net/netfilter/xt_MARK.c
index bc6503d77d7..f9ce20b5898 100644
--- a/net/netfilter/xt_MARK.c
+++ b/net/netfilter/xt_MARK.c
@@ -1,10 +1,13 @@
-/* This is a module which is used for setting the NFMARK field of an skb. */
-
-/* (C) 1999-2001 Marc Boucher <marc@mbsi.ca>
+/*
+ * xt_MARK - Netfilter module to modify the NFMARK field of an skb
+ *
+ * (C) 1999-2001 Marc Boucher <marc@mbsi.ca>
+ * Copyright © CC Computer Consultants GmbH, 2007 - 2008
+ * Jan Engelhardt <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
- * published by the Free Software Foundation.
+ * 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
+ * published by the Free Software Foundation.
*/
#include <linux/module.h>
@@ -17,17 +20,14 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>");
-MODULE_DESCRIPTION("ip[6]tables MARK modification module");
+MODULE_DESCRIPTION("Xtables: packet mark modification");
MODULE_ALIAS("ipt_MARK");
MODULE_ALIAS("ip6t_MARK");
static unsigned int
-target_v0(struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- unsigned int hooknum,
- const struct xt_target *target,
- const void *targinfo)
+mark_tg_v0(struct sk_buff *skb, const struct net_device *in,
+ const struct net_device *out, unsigned int hooknum,
+ const struct xt_target *target, const void *targinfo)
{
const struct xt_mark_target_info *markinfo = targinfo;
@@ -36,12 +36,9 @@ target_v0(struct sk_buff *skb,
}
static unsigned int
-target_v1(struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- unsigned int hooknum,
- const struct xt_target *target,
- const void *targinfo)
+mark_tg_v1(struct sk_buff *skb, const struct net_device *in,
+ const struct net_device *out, unsigned int hooknum,
+ const struct xt_target *target, const void *targinfo)
{
const struct xt_mark_target_info_v1 *markinfo = targinfo;
int mark = 0;
@@ -64,13 +61,21 @@ target_v1(struct sk_buff *skb,
return XT_CONTINUE;
}
+static unsigned int
+mark_tg(struct sk_buff *skb, const struct net_device *in,
+ const struct net_device *out, unsigned int hooknum,
+ const struct xt_target *target, const void *targinfo)
+{
+ const struct xt_mark_tginfo2 *info = targinfo;
+
+ skb->mark = (skb->mark & ~info->mask) ^ info->mark;
+ return XT_CONTINUE;
+}
static bool
-checkentry_v0(const char *tablename,
- const void *entry,
- const struct xt_target *target,
- void *targinfo,
- unsigned int hook_mask)
+mark_tg_check_v0(const char *tablename, const void *entry,
+ const struct xt_target *target, void *targinfo,
+ unsigned int hook_mask)
{
const struct xt_mark_target_info *markinfo = targinfo;
@@ -82,11 +87,9 @@ checkentry_v0(const char *tablename,
}
static bool
-checkentry_v1(const char *tablename,
- const void *entry,
- const struct xt_target *target,
- void *targinfo,
- unsigned int hook_mask)
+mark_tg_check_v1(const char *tablename, const void *entry,
+ const struct xt_target *target, void *targinfo,
+ unsigned int hook_mask)
{
const struct xt_mark_target_info_v1 *markinfo = targinfo;
@@ -105,6 +108,28 @@ checkentry_v1(const char *tablename,
}
#ifdef CONFIG_COMPAT
+struct compat_xt_mark_target_info {
+ compat_ulong_t mark;
+};
+
+static void mark_tg_compat_from_user_v0(void *dst, void *src)
+{
+ const struct compat_xt_mark_target_info *cm = src;
+ struct xt_mark_target_info m = {
+ .mark = cm->mark,
+ };
+ memcpy(dst, &m, sizeof(m));
+}
+
+static int mark_tg_compat_to_user_v0(void __user *dst, void *src)
+{
+ const struct xt_mark_target_info *m = src;
+ struct compat_xt_mark_target_info cm = {
+ .mark = m->mark,
+ };
+ return copy_to_user(dst, &cm, sizeof(cm)) ? -EFAULT : 0;
+}
+
struct compat_xt_mark_target_info_v1 {
compat_ulong_t mark;
u_int8_t mode;
@@ -112,7 +137,7 @@ struct compat_xt_mark_target_info_v1 {
u_int16_t __pad2;
};
-static void compat_from_user_v1(void *dst, void *src)
+static void mark_tg_compat_from_user_v1(void *dst, void *src)
{
const struct compat_xt_mark_target_info_v1 *cm = src;
struct xt_mark_target_info_v1 m = {
@@ -122,7 +147,7 @@ static void compat_from_user_v1(void *dst, void *src)
memcpy(dst, &m, sizeof(m));
}
-static int compat_to_user_v1(void __user *dst, void *src)
+static int mark_tg_compat_to_user_v1(void __user *dst, void *src)
{
const struct xt_mark_target_info_v1 *m = src;
struct compat_xt_mark_target_info_v1 cm = {
@@ -133,14 +158,19 @@ static int compat_to_user_v1(void __user *dst, void *src)
}
#endif /* CONFIG_COMPAT */
-static struct xt_target xt_mark_target[] __read_mostly = {
+static struct xt_target mark_tg_reg[] __read_mostly = {
{
.name = "MARK",
.family = AF_INET,
.revision = 0,
- .checkentry = checkentry_v0,
- .target = target_v0,
+ .checkentry = mark_tg_check_v0,
+ .target = mark_tg_v0,
.targetsize = sizeof(struct xt_mark_target_info),
+#ifdef CONFIG_COMPAT
+ .compatsize = sizeof(struct compat_xt_mark_target_info),
+ .compat_from_user = mark_tg_compat_from_user_v0,
+ .compat_to_user = mark_tg_compat_to_user_v0,
+#endif
.table = "mangle",
.me = THIS_MODULE,
},
@@ -148,13 +178,13 @@ static struct xt_target xt_mark_target[] __read_mostly = {
.name = "MARK",
.family = AF_INET,
.revision = 1,
- .checkentry = checkentry_v1,
- .target = target_v1,
+ .checkentry = mark_tg_check_v1,
+ .target = mark_tg_v1,
.targetsize = sizeof(struct xt_mark_target_info_v1),
#ifdef CONFIG_COMPAT
.compatsize = sizeof(struct compat_xt_mark_target_info_v1),
- .compat_from_user = compat_from_user_v1,
- .compat_to_user = compat_to_user_v1,
+ .compat_from_user = mark_tg_compat_from_user_v1,
+ .compat_to_user = mark_tg_compat_to_user_v1,
#endif
.table = "mangle",
.me = THIS_MODULE,
@@ -163,23 +193,59 @@ static struct xt_target xt_mark_target[] __read_mostly = {
.name = "MARK",
.family = AF_INET6,
.revision = 0,
- .checkentry = checkentry_v0,
- .target = target_v0,
+ .checkentry = mark_tg_check_v0,
+ .target = mark_tg_v0,
.targetsize = sizeof(struct xt_mark_target_info),
+#ifdef CONFIG_COMPAT
+ .compatsize = sizeof(struct compat_xt_mark_target_info),
+ .compat_from_user = mark_tg_compat_from_user_v0,
+ .compat_to_user = mark_tg_compat_to_user_v0,
+#endif
+ .table = "mangle",
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "MARK",
+ .family = AF_INET6,
+ .revision = 1,
+ .checkentry = mark_tg_check_v1,
+ .target = mark_tg_v1,
+ .targetsize = sizeof(struct xt_mark_target_info_v1),
+#ifdef CONFIG_COMPAT
+ .compatsize = sizeof(struct compat_xt_mark_target_info_v1),
+ .compat_from_user = mark_tg_compat_from_user_v1,
+ .compat_to_user = mark_tg_compat_to_user_v1,
+#endif
.table = "mangle",
.me = THIS_MODULE,
},
+ {
+ .name = "MARK",
+ .revision = 2,
+ .family = AF_INET,
+ .target = mark_tg,
+ .targetsize = sizeof(struct xt_mark_tginfo2),
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "MARK",
+ .revision = 2,
+ .family = AF_INET6,
+ .target = mark_tg,
+ .targetsize = sizeof(struct xt_mark_tginfo2),
+ .me = THIS_MODULE,
+ },
};
-static int __init xt_mark_init(void)
+static int __init mark_tg_init(void)
{
- return xt_register_targets(xt_mark_target, ARRAY_SIZE(xt_mark_target));
+ return xt_register_targets(mark_tg_reg, ARRAY_SIZE(mark_tg_reg));
}
-static void __exit xt_mark_fini(void)
+static void __exit mark_tg_exit(void)
{
- xt_unregister_targets(xt_mark_target, ARRAY_SIZE(xt_mark_target));
+ xt_unregister_targets(mark_tg_reg, ARRAY_SIZE(mark_tg_reg));
}
-module_init(xt_mark_init);
-module_exit(xt_mark_fini);
+module_init(mark_tg_init);
+module_exit(mark_tg_exit);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-25 23:26:29 +0000