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authorPatrick McHardy <kaber@trash.net>2006-11-29 02:35:38 +0100
committerDavid S. Miller <davem@sunset.davemloft.net>2006-12-02 21:31:31 -0800
commitbaf7b1e11282127e068d149825cccec002091d61 (patch)
tree33eae4a25dad2666e5b51bffb76d5c7d2db725c2 /net
parent39b46fc6f0d1161a5585cd8af7b3a05e8118ab7e (diff)
[NETFILTER]: x_tables: add NFLOG target
Add new NFLOG target to allow use of nfnetlink_log for both IPv4 and IPv6. Currently we have two (unsupported by userspace) hacks in the LOG and ULOG targets to optionally call to the nflog API. They lack a few features, namely the IPv4 and IPv6 LOG targets can not specify a number of arguments related to nfnetlink_log, while the ULOG target is only available for IPv4. Remove those hacks and add a clean way to use nfnetlink_log. Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/netfilter/ipt_LOG.c9
-rw-r--r--net/ipv6/netfilter/ip6t_LOG.c9
-rw-r--r--net/netfilter/Kconfig11
-rw-r--r--net/netfilter/Makefile1
-rw-r--r--net/netfilter/xt_NFLOG.c86
5 files changed, 102 insertions, 14 deletions
diff --git a/net/ipv4/netfilter/ipt_LOG.c b/net/ipv4/netfilter/ipt_LOG.c
index 46eee64a11f..c96de16fefa 100644
--- a/net/ipv4/netfilter/ipt_LOG.c
+++ b/net/ipv4/netfilter/ipt_LOG.c
@@ -430,13 +430,8 @@ ipt_log_target(struct sk_buff **pskb,
li.u.log.level = loginfo->level;
li.u.log.logflags = loginfo->logflags;
- if (loginfo->logflags & IPT_LOG_NFLOG)
- nf_log_packet(PF_INET, hooknum, *pskb, in, out, &li,
- "%s", loginfo->prefix);
- else
- ipt_log_packet(PF_INET, hooknum, *pskb, in, out, &li,
- loginfo->prefix);
-
+ ipt_log_packet(PF_INET, hooknum, *pskb, in, out, &li,
+ loginfo->prefix);
return IPT_CONTINUE;
}
diff --git a/net/ipv6/netfilter/ip6t_LOG.c b/net/ipv6/netfilter/ip6t_LOG.c
index f4857cf97f0..33b1faa90d7 100644
--- a/net/ipv6/netfilter/ip6t_LOG.c
+++ b/net/ipv6/netfilter/ip6t_LOG.c
@@ -440,13 +440,8 @@ ip6t_log_target(struct sk_buff **pskb,
li.u.log.level = loginfo->level;
li.u.log.logflags = loginfo->logflags;
- if (loginfo->logflags & IP6T_LOG_NFLOG)
- nf_log_packet(PF_INET6, hooknum, *pskb, in, out, &li,
- "%s", loginfo->prefix);
- else
- ip6t_log_packet(PF_INET6, hooknum, *pskb, in, out, &li,
- loginfo->prefix);
-
+ ip6t_log_packet(PF_INET6, hooknum, *pskb, in, out, &li,
+ loginfo->prefix);
return IP6T_CONTINUE;
}
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index 7e6125467c1..d191dacead5 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -184,6 +184,17 @@ config NETFILTER_XT_TARGET_NFQUEUE
To compile it as a module, choose M here. If unsure, say N.
+config NETFILTER_XT_TARGET_NFLOG
+ tristate '"NFLOG" target support'
+ depends on NETFILTER_XTABLES
+ help
+ This option enables the NFLOG target, which allows to LOG
+ messages through the netfilter logging API, which can use
+ either the old LOG target, the old ULOG target or nfnetlink_log
+ as backend.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
config NETFILTER_XT_TARGET_NOTRACK
tristate '"NOTRACK" target support'
depends on NETFILTER_XTABLES
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index f85811bfcfe..7f0089c584b 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_CONNMARK) += xt_CONNMARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_DSCP) += xt_DSCP.o
obj-$(CONFIG_NETFILTER_XT_TARGET_MARK) += xt_MARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE) += xt_NFQUEUE.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) += xt_NFLOG.o
obj-$(CONFIG_NETFILTER_XT_TARGET_NOTRACK) += xt_NOTRACK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_SECMARK) += xt_SECMARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o
diff --git a/net/netfilter/xt_NFLOG.c b/net/netfilter/xt_NFLOG.c
new file mode 100644
index 00000000000..901ed7abaa1
--- /dev/null
+++ b/net/netfilter/xt_NFLOG.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2006 Patrick McHardy <kaber@trash.net>
+ *
+ * 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>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+
+#include <linux/netfilter/x_tables.h>
+#include <linux/netfilter/xt_NFLOG.h>
+
+MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
+MODULE_DESCRIPTION("x_tables NFLOG target");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("ipt_NFLOG");
+MODULE_ALIAS("ip6t_NFLOG");
+
+static unsigned int
+nflog_target(struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ unsigned int hooknum, const struct xt_target *target,
+ const void *targinfo)
+{
+ const struct xt_nflog_info *info = targinfo;
+ struct nf_loginfo li;
+
+ li.type = NF_LOG_TYPE_ULOG;
+ li.u.ulog.copy_len = info->len;
+ li.u.ulog.group = info->group;
+ li.u.ulog.qthreshold = info->threshold;
+
+ nf_log_packet(target->family, hooknum, *pskb, in, out, &li,
+ "%s", info->prefix);
+ return XT_CONTINUE;
+}
+
+static int
+nflog_checkentry(const char *tablename, const void *entry,
+ const struct xt_target *target, void *targetinfo,
+ unsigned int hookmask)
+{
+ struct xt_nflog_info *info = targetinfo;
+
+ if (info->flags & ~XT_NFLOG_MASK)
+ return 0;
+ if (info->prefix[sizeof(info->prefix) - 1] != '\0')
+ return 0;
+ return 1;
+}
+
+static struct xt_target xt_nflog_target[] = {
+ {
+ .name = "NFLOG",
+ .family = AF_INET,
+ .checkentry = nflog_checkentry,
+ .target = nflog_target,
+ .targetsize = sizeof(struct xt_nflog_info),
+ .me = THIS_MODULE,
+ },
+ {
+ .name = "NFLOG",
+ .family = AF_INET6,
+ .checkentry = nflog_checkentry,
+ .target = nflog_target,
+ .targetsize = sizeof(struct xt_nflog_info),
+ .me = THIS_MODULE,
+ },
+};
+
+static int __init xt_nflog_init(void)
+{
+ return xt_register_targets(xt_nflog_target,
+ ARRAY_SIZE(xt_nflog_target));
+}
+
+static void __exit xt_nflog_fini(void)
+{
+ xt_unregister_targets(xt_nflog_target, ARRAY_SIZE(xt_nflog_target));
+}
+
+module_init(xt_nflog_init);
+module_exit(xt_nflog_fini);