patch-2.1.73 linux/include/net/ip_masq_mod.h

• Lines: 79
• Date: Wed Dec 10 09:45:16 1997
• Orig file: v2.1.72/linux/include/net/ip_masq_mod.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.72/linux/include/net/ip_masq_mod.h linux/include/net/ip_masq_mod.h
@@ -0,0 +1,78 @@
+/*
+ *	IP Masquerading Modules Support
+ *
+ * Version:	@(#)ip_masq_mod.h  0.01      97/10/30
+ *
+ * Author:	Juan Jose Ciarlante, <jjciarla@raiz.uncu.edu.ar>
+ *
+ */
+
+
+#ifdef __KERNEL__
+#include <linux/types.h>
+#include <linux/ip_fw.h>
+#include <linux/proc_fs.h>
+#include <net/ip_masq.h>
+
+enum {
+	IP_MASQ_MOD_NOP,
+	IP_MASQ_MOD_ACCEPT,
+	IP_MASQ_MOD_REJECT
+};
+
+struct ip_masq_mod {
+	struct ip_masq_mod *next;	/* next mod for addrs. lookups */
+	struct ip_masq_mod *next_reg;	/* next mod for configuration ctls */
+	char *mmod_name;
+	atomic_t refcnt;
+	atomic_t mmod_nent;		/* number of entries */
+	struct proc_dir_entry *mmod_proc_ent;
+	int (*mmod_ctl) (int optname, struct ip_fw_masqctl *, int optlen);
+	int (*mmod_init) (void);
+	int (*mmod_done) (void);
+	int (*mmod_in_rule) (struct iphdr *, __u16 *);
+	int (*mmod_in_update) (struct iphdr *, struct ip_masq *);
+	struct ip_masq * (*mmod_in_create) (struct iphdr *, __u16 *, __u32);
+	int (*mmod_out_rule) (struct iphdr *, __u16 *);
+	int (*mmod_out_update) (struct iphdr *, __u16 *, struct ip_masq *);
+	struct ip_masq * (*mmod_out_create) (struct iphdr *, __u16 *, __u32);
+};
+
+/*
+ *	Service routines (called from ip_masq.c)
+ */
+int ip_masq_mod_out_rule(struct iphdr *iph, __u16 *portp);
+int ip_masq_mod_out_update(struct iphdr *iph, __u16 *portp, struct ip_masq *ms);
+struct ip_masq * ip_masq_mod_out_create(struct iphdr *iph, __u16 *portp, __u32 maddr);
+
+int ip_masq_mod_in_rule(struct iphdr *iph, __u16 *portp);
+int ip_masq_mod_in_update(struct iphdr *iph, __u16 *portp, struct ip_masq *ms);
+struct ip_masq * ip_masq_mod_in_create(struct iphdr *iph, __u16 *portp, __u32 maddr);
+
+extern int ip_masq_mod_ctl(int optname, struct ip_fw_masqctl *, int len);
+
+/*
+ * 	ip_masq_mod registration functions 
+ */
+extern int register_ip_masq_mod(struct ip_masq_mod *mmod);
+extern int unregister_ip_masq_mod(struct ip_masq_mod *mmod);
+extern int ip_masq_mod_lkp_unlink(struct ip_masq_mod *mmod);
+extern int ip_masq_mod_lkp_link(struct ip_masq_mod *mmod);
+
+/*
+ *	Utility ...
+ */
+static __inline__ void ip_masq_mod_dec_nent(struct ip_masq_mod *mmod)
+{
+	if (atomic_dec_and_test(&mmod->mmod_nent)) {
+		ip_masq_mod_lkp_unlink(mmod);
+	}
+}
+static __inline__ void ip_masq_mod_inc_nent(struct ip_masq_mod *mmod)
+{
+	atomic_inc(&mmod->mmod_nent);
+	if (atomic_read(&mmod->mmod_nent)==1)
+		ip_masq_mod_lkp_link(mmod);
+}
+
+#endif /* __KERNEL__ */