patch-2.3.15 linux/include/net/ip_masq.h

• Lines: 341
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.14/linux/include/net/ip_masq.h
• Orig date: Wed Aug 18 16:44:42 1999

diff -u --recursive --new-file v2.3.14/linux/include/net/ip_masq.h linux/include/net/ip_masq.h
@@ -1,340 +0,0 @@
-/*
- * 	IP masquerading functionality definitions
- */
-
-#include <linux/config.h> /* for CONFIG_IP_MASQ_DEBUG */
-#ifndef _IP_MASQ_H
-#define _IP_MASQ_H
-
-#ifdef __KERNEL__
-#include <linux/types.h>
-#include <linux/netdevice.h>
-#include <linux/ip.h>
-#include <linux/skbuff.h>
-#endif /* __KERNEL__ */
-
-/*
- * This define affects the number of ports that can be handled
- * by each of the protocol helper modules.
- */
-#define MAX_MASQ_APP_PORTS 12
-
-/*
- *	Linux ports don't normally get allocated above 32K.
- *	I used an extra 4K port-space
- */
-
-#define PORT_MASQ_BEGIN	61000
-#define PORT_MASQ_END	(PORT_MASQ_BEGIN+4096)
-
-#define MASQUERADE_EXPIRE_TCP     15*60*HZ
-#define MASQUERADE_EXPIRE_TCP_FIN  2*60*HZ
-#define MASQUERADE_EXPIRE_UDP      5*60*HZ
-/* 
- * ICMP can no longer be modified on the fly using an ioctl - this
- * define is the only way to change the timeouts 
- */
-#define MASQUERADE_EXPIRE_ICMP      125*HZ
-
-#define IP_MASQ_MOD_CTL			0x00
-#define IP_MASQ_USER_CTL		0x01
-
-#ifdef __KERNEL__
-
-#define IP_MASQ_TAB_SIZE	256
-
-#define IP_MASQ_F_NO_DADDR	      0x0001 	/* no daddr yet */
-#define IP_MASQ_F_NO_DPORT     	      0x0002	/* no dport set yet */
-#define IP_MASQ_F_NO_SADDR	      0x0004	/* no sport set yet */
-#define IP_MASQ_F_NO_SPORT	      0x0008	/* no sport set yet */
-
-#define IP_MASQ_F_DLOOSE	      0x0010	/* loose dest binding */
-#define IP_MASQ_F_NO_REPLY	      0x0080	/* no reply yet from outside */
-
-#define IP_MASQ_F_HASHED	      0x0100 	/* hashed entry */
-#define IP_MASQ_F_OUT_SEQ             0x0200	/* must do output seq adjust */
-#define IP_MASQ_F_IN_SEQ              0x0400	/* must do input seq adjust */
-
-#define IP_MASQ_F_MPORT		      0x1000 	/* own mport specified */
-#define IP_MASQ_F_USER		      0x2000	/* from uspace */
-
-/*
- *	Delta seq. info structure
- *	Each MASQ struct has 2 (output AND input seq. changes).
- */
-
-struct ip_masq_seq {
-        __u32		init_seq;	/* Add delta from this seq */
-        short		delta;		/* Delta in sequence numbers */
-        short		previous_delta;	/* Delta in sequence numbers before last resized pkt */
-};
-
-/*
- *	MASQ structure allocated for each masqueraded association
- */
-struct ip_masq {
-        struct ip_masq  *m_link, *s_link; /* hashed link ptrs */
-	atomic_t refcnt;		/* reference count */
-	struct timer_list timer;	/* Expiration timer */
-	__u16 		protocol;	/* Which protocol are we talking? */
-	__u16		sport, dport, mport;	/* src, dst & masq ports */
-	__u32 		saddr, daddr, maddr;	/* src, dst & masq addresses */
-        struct ip_masq_seq out_seq, in_seq;
-	struct ip_masq_app *app;	/* bound ip_masq_app object */
-	void		*app_data;	/* Application private data */
-	struct ip_masq	*control;	/* Master control connection */
-	atomic_t        n_control;	/* Number of "controlled" masqs */
-	unsigned  	flags;        	/* status flags */
-	unsigned	timeout;	/* timeout */
-	unsigned	state;		/* state info */
-	struct ip_masq_timeout_table *timeout_table;
-};
-
-/*
- *	Timeout values
- *	ipchains holds a copy of this definition
- */
-
-struct ip_fw_masq {
-        int tcp_timeout;
-        int tcp_fin_timeout;
-        int udp_timeout;
-};
-
-union ip_masq_tphdr {
-		unsigned char *raw;
-		struct udphdr *uh;
-		struct tcphdr *th;
-		struct icmphdr *icmph;
-		__u16 *portp;
-};
-/*
- *	[0]: UDP free_ports
- *	[1]: TCP free_ports
- *	[2]: ICMP free_ports
- */
-
-extern atomic_t ip_masq_free_ports[3];
-
-/*
- *	ip_masq initializer (registers symbols and /proc/net entries)
- */
-extern int ip_masq_init(void);
-
-/*
- *	functions called from ip layer
- */
-extern int ip_fw_masquerade(struct sk_buff **, __u32 maddr);
-extern int ip_fw_masq_icmp(struct sk_buff **, __u32 maddr);
-extern int ip_fw_unmasq_icmp(struct sk_buff *);
-extern int ip_fw_demasquerade(struct sk_buff **);
-
-/*
- *	ip_masq obj creation/deletion functions.
- */
-extern struct ip_masq *ip_masq_new(int proto, __u32 maddr, __u16 mport, __u32 saddr, __u16 sport, __u32 daddr, __u16 dport, unsigned flags);
-
-extern void ip_masq_control_add(struct ip_masq *ms, struct ip_masq* ctl_ms);
-extern void ip_masq_control_del(struct ip_masq *ms);
-extern struct ip_masq * ip_masq_control_get(struct ip_masq *ms);
-
-struct ip_masq_ctl;
- 
-struct ip_masq_hook {
-	int (*ctl)(int, struct ip_masq_ctl *, int);
-	int (*info)(char *, char **, off_t, int, int);
-};
-
-extern struct ip_masq *ip_masq_m_tab[IP_MASQ_TAB_SIZE];
-extern struct ip_masq *ip_masq_s_tab[IP_MASQ_TAB_SIZE];
-extern const char * ip_masq_state_name(int state);
-extern struct ip_masq_hook *ip_masq_user_hook;
-extern u32 ip_masq_select_addr(struct net_device *dev, u32 dst, int scope);
-/*
- * 	
- *	IP_MASQ_APP: IP application masquerading definitions 
- *
- */
-
-struct ip_masq_app
-{
-        struct ip_masq_app *next;
-	char *name;		/* name of application proxy */
-        unsigned type;          /* type = proto<<16 | port (host byte order)*/
-        int n_attach;
-        int (*masq_init_1)      /* ip_masq initializer */
-                (struct ip_masq_app *, struct ip_masq *);
-        int (*masq_done_1)      /* ip_masq fin. */
-                (struct ip_masq_app *, struct ip_masq *);
-        int (*pkt_out)          /* output (masquerading) hook */
-                (struct ip_masq_app *, struct ip_masq *, struct sk_buff **, __u32);
-        int (*pkt_in)           /* input (demasq) hook */
-                (struct ip_masq_app *, struct ip_masq *, struct sk_buff **, __u32);
-};
-
-/*
- *	ip_masq_app initializer
- */
-extern int ip_masq_app_init(void);
-
-/*
- * 	ip_masq_app object registration functions (port: host byte order)
- */
-extern int register_ip_masq_app(struct ip_masq_app *mapp, unsigned short proto, __u16 port);
-extern int unregister_ip_masq_app(struct ip_masq_app *mapp);
-
-/*
- *	get ip_masq_app obj by proto,port(net_byte_order)
- */
-extern struct ip_masq_app * ip_masq_app_get(unsigned short proto, __u16 port);
-
-/*
- *	ip_masq TO ip_masq_app (un)binding functions.
- */
-extern struct ip_masq_app * ip_masq_bind_app(struct ip_masq *ms);
-extern int ip_masq_unbind_app(struct ip_masq *ms);
-
-/*
- *	output and input app. masquerading hooks.
- *	
- */
-extern int ip_masq_app_pkt_out(struct ip_masq *, struct sk_buff **skb_p, __u32 maddr);
-extern int ip_masq_app_pkt_in(struct ip_masq *, struct sk_buff **skb_p, __u32 maddr);
-
-/*
- *	service routine(s).
- */
-
-extern struct ip_masq * ip_masq_out_get(int protocol, __u32 s_addr, __u16 s_port, __u32 d_addr, __u16 d_port);
-extern struct ip_masq * ip_masq_in_get(int protocol, __u32 s_addr, __u16 s_port, __u32 d_addr, __u16 d_port);
-
-extern int ip_masq_listen(struct ip_masq *);
-
-static __inline__ struct ip_masq * ip_masq_in_get_iph(const struct iphdr *iph)
-{
- 	const __u16 *portp = (__u16 *)&(((char *)iph)[iph->ihl*4]);
-        return ip_masq_in_get(iph->protocol, 
-				iph->saddr, portp[0], 
-				iph->daddr, portp[1]);
-}
-
-static __inline__ struct ip_masq * ip_masq_out_get_iph(const struct iphdr *iph)
-{
- 	const __u16 *portp  = (__u16 *)&(((char *)iph)[iph->ihl*4]);
-        return ip_masq_out_get(iph->protocol, 
-				iph->saddr, portp[0], 
-				iph->daddr, portp[1]);
-}
-
-extern void ip_masq_put(struct ip_masq *ms);
-
-
-extern rwlock_t __ip_masq_lock;
-
-
-/*
- *	Debugging stuff
- */
-
-extern int ip_masq_get_debug_level(void);
-
-#ifdef CONFIG_IP_MASQ_DEBUG
-#define IP_MASQ_DEBUG(level, msg...) do { \
-	if (level <= ip_masq_get_debug_level()) \
-		printk(KERN_DEBUG "IP_MASQ:" ## msg); \
-	} while (0)
-#else	/* NO DEBUGGING at ALL */
-#define IP_MASQ_DEBUG(level, msg...) do { } while (0)
-#endif
-
-#define IP_MASQ_INFO(msg...) \
-	printk(KERN_INFO "IP_MASQ:" ## msg)
-
-#define IP_MASQ_ERR(msg...) \
-	printk(KERN_ERR "IP_MASQ:" ## msg)
-
-#define IP_MASQ_WARNING(msg...) \
-	printk(KERN_WARNING "IP_MASQ:" ## msg)
-
-
-/*
- *	/proc/net entry
- */
-extern int ip_masq_proc_register(struct proc_dir_entry *);
-extern void ip_masq_proc_unregister(struct proc_dir_entry *);
-extern int ip_masq_app_getinfo(char *buffer, char **start, off_t offset, int length, int dummy);
-
-/*
- *	skb_replace function used by "client" modules to replace
- *	a segment of skb.
- */
-extern struct sk_buff * ip_masq_skb_replace(struct sk_buff *skb, int pri, char *o_buf, int o_len, char *n_buf, int n_len);
-
-/*
- * masq_proto_num returns 0 for UDP, 1 for TCP, 2 for ICMP
- */
-
-static __inline__ int masq_proto_num(unsigned proto)
-{
-   switch (proto)
-   {
-      case IPPROTO_UDP:  return (0); break;
-      case IPPROTO_TCP:  return (1); break;
-      case IPPROTO_ICMP: return (2); break;
-      default:           return (-1); break;
-   }
-}
-
-static __inline__ const char *masq_proto_name(unsigned proto)
-{
-	static char buf[20];
-	static const char *strProt[] = {"UDP","TCP","ICMP"};
-	int msproto = masq_proto_num(proto);
-
-	if (msproto<0||msproto>2)  {
-		sprintf(buf, "IP_%d", proto);
-		return buf;
-	}
-        return strProt[msproto];
-}
-
-enum {
-	IP_MASQ_S_NONE = 0,
-	IP_MASQ_S_ESTABLISHED,
-	IP_MASQ_S_SYN_SENT,
-	IP_MASQ_S_SYN_RECV,
-	IP_MASQ_S_FIN_WAIT,
-	IP_MASQ_S_TIME_WAIT,
-	IP_MASQ_S_CLOSE,
-	IP_MASQ_S_CLOSE_WAIT,
-	IP_MASQ_S_LAST_ACK,
-	IP_MASQ_S_LISTEN,
-	IP_MASQ_S_UDP,
-	IP_MASQ_S_ICMP,
-	IP_MASQ_S_LAST
-};
-
-struct ip_masq_timeout_table {
-	atomic_t refcnt;
-	int scale;
-	int timeout[IP_MASQ_S_LAST+1];
-};
-
-static __inline__ void ip_masq_timeout_attach(struct ip_masq *ms, struct ip_masq_timeout_table *mstim)
-{
-	atomic_inc (&mstim->refcnt);
-	ms->timeout_table=mstim;
-}
-
-static __inline__ void ip_masq_timeout_detach(struct ip_masq *ms)
-{
-	struct ip_masq_timeout_table *mstim = ms->timeout_table;
-
-	if (!mstim)
-		return;
-	atomic_dec(&mstim->refcnt);
-}
-
-#endif /* __KERNEL__ */
-
-#endif /* _IP_MASQ_H */