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authorHarald Welte <laforge@netfilter.org>2005-08-09 19:58:27 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2005-08-29 15:38:07 -0700
commit608c8e4f7b6e61cc783283e9dff8a465a5ad59bb (patch)
tree55ca8bed99789cd6af07f6cc6ee99b0cf718a611 /include
parent838ab6364956d9bdcefe84712de1621cf20a40b3 (diff)
[NETFILTER]: Extend netfilter logging API
This patch is in preparation to nfnetlink_log: - loggers now have to register struct nf_logger instead of nf_logfn - nf_log_unregister() replaced by nf_log_unregister_pf() and nf_log_unregister_logger() - add comment to ip[6]t_LOG.h to assure nobody redefines flags - add /proc/net/netfilter/nf_log to tell user which logger is currently registered for which address family - if user has configured logging, but no logging backend (logger) is available, always spit a message to syslog, not just the first time. - split ip[6]t_LOG.c into two parts: Backend: Always try to register as logger for the respective address family Frontend: Always log via nf_log_packet() API - modify all users of nf_log_packet() to accomodate additional argument Signed-off-by: Harald Welte <laforge@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/netfilter.h48
-rw-r--r--include/linux/netfilter_ipv4/ipt_LOG.h1
-rw-r--r--include/linux/netfilter_ipv6/ip6t_LOG.h1
3 files changed, 47 insertions, 3 deletions
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index 711e05f33d6..815583af06c 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -114,15 +114,51 @@ void nf_unregister_sockopt(struct nf_sockopt_ops *reg);
extern struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS];
-typedef void nf_logfn(unsigned int hooknum,
+/* those NF_LOG_* defines and struct nf_loginfo are legacy definitios that will
+ * disappear once iptables is replaced with pkttables. Please DO NOT use them
+ * for any new code! */
+#define NF_LOG_TCPSEQ 0x01 /* Log TCP sequence numbers */
+#define NF_LOG_TCPOPT 0x02 /* Log TCP options */
+#define NF_LOG_IPOPT 0x04 /* Log IP options */
+#define NF_LOG_UID 0x08 /* Log UID owning local socket */
+#define NF_LOG_MASK 0x0f
+
+#define NF_LOG_TYPE_LOG 0x01
+#define NF_LOG_TYPE_ULOG 0x02
+
+struct nf_loginfo {
+ u_int8_t type;
+ union {
+ struct {
+ u_int32_t copy_len;
+ u_int16_t group;
+ u_int16_t qthreshold;
+ } ulog;
+ struct {
+ u_int8_t level;
+ u_int8_t logflags;
+ } log;
+ } u;
+};
+
+typedef void nf_logfn(unsigned int pf,
+ unsigned int hooknum,
const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
+ const struct nf_loginfo *li,
const char *prefix);
+struct nf_logger {
+ struct module *me;
+ nf_logfn *logfn;
+ char *name;
+};
+
/* Function to register/unregister log function. */
-int nf_log_register(int pf, nf_logfn *logfn);
-void nf_log_unregister(int pf, nf_logfn *logfn);
+int nf_log_register(int pf, struct nf_logger *logger);
+void nf_log_unregister_pf(int pf);
+void nf_log_unregister_logger(struct nf_logger *logger);
/* Calls the registered backend logging function */
void nf_log_packet(int pf,
@@ -130,6 +166,7 @@ void nf_log_packet(int pf,
const struct sk_buff *skb,
const struct net_device *in,
const struct net_device *out,
+ struct nf_loginfo *li,
const char *fmt, ...);
/* Activate hook; either okfn or kfree_skb called, unless a hook
@@ -221,6 +258,11 @@ struct nf_queue_rerouter {
extern int nf_register_queue_rerouter(int pf, struct nf_queue_rerouter *rer);
extern int nf_unregister_queue_rerouter(int pf);
+#ifdef CONFIG_PROC_FS
+#include <linux/proc_fs.h>
+extern struct proc_dir_entry *proc_net_netfilter;
+#endif
+
#else /* !CONFIG_NETFILTER */
#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) (okfn)(skb)
static inline void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb) {}
diff --git a/include/linux/netfilter_ipv4/ipt_LOG.h b/include/linux/netfilter_ipv4/ipt_LOG.h
index d25f782e57d..22d16177319 100644
--- a/include/linux/netfilter_ipv4/ipt_LOG.h
+++ b/include/linux/netfilter_ipv4/ipt_LOG.h
@@ -1,6 +1,7 @@
#ifndef _IPT_LOG_H
#define _IPT_LOG_H
+/* make sure not to change this without changing netfilter.h:NF_LOG_* (!) */
#define IPT_LOG_TCPSEQ 0x01 /* Log TCP sequence numbers */
#define IPT_LOG_TCPOPT 0x02 /* Log TCP options */
#define IPT_LOG_IPOPT 0x04 /* Log IP options */
diff --git a/include/linux/netfilter_ipv6/ip6t_LOG.h b/include/linux/netfilter_ipv6/ip6t_LOG.h
index 42996a43bb3..9008ff5c40a 100644
--- a/include/linux/netfilter_ipv6/ip6t_LOG.h
+++ b/include/linux/netfilter_ipv6/ip6t_LOG.h
@@ -1,6 +1,7 @@
#ifndef _IP6T_LOG_H
#define _IP6T_LOG_H
+/* make sure not to change this without changing netfilter.h:NF_LOG_* (!) */
#define IP6T_LOG_TCPSEQ 0x01 /* Log TCP sequence numbers */
#define IP6T_LOG_TCPOPT 0x02 /* Log TCP options */
#define IP6T_LOG_IPOPT 0x04 /* Log IP options */