iptables.h revision dcfb7a77f8709125e97c313cb8ab6ec4d87468f4 
1#ifndef _IPTABLES_USER_H
2#define _IPTABLES_USER_H
3
4#include "iptables_common.h"
5#include "libiptc/libiptc.h"
6
7#ifndef IPT_LIB_DIR
8#define IPT_LIB_DIR "/usr/local/lib/iptables"
9#endif
10
11#ifndef IPPROTO_SCTP
12#define IPPROTO_SCTP 132
13#endif
14
15#ifndef IPT_SO_GET_REVISION_MATCH /* Old kernel source. */
16#define IPT_SO_GET_REVISION_MATCH	(IPT_BASE_CTL + 2)
17#define IPT_SO_GET_REVISION_TARGET	(IPT_BASE_CTL + 3)
18
19struct ipt_get_revision
20{
21	char name[IPT_FUNCTION_MAXNAMELEN-1];
22
23	u_int8_t revision;
24};
25#endif /* IPT_SO_GET_REVISION_MATCH   Old kernel source */
26
27struct iptables_rule_match
28{
29	struct iptables_rule_match *next;
30
31	struct iptables_match *match;
32};
33
34/* Include file for additions: new matches and targets. */
35struct iptables_match
36{
37	struct iptables_match *next;
38
39	ipt_chainlabel name;
40
41	/* Revision of match (0 by default). */
42	u_int8_t revision;
43
44	const char *version;
45
46	/* Size of match data. */
47	size_t size;
48
49	/* Size of match data relevent for userspace comparison purposes */
50	size_t userspacesize;
51
52	/* Function which prints out usage message. */
53	void (*help)(void);
54
55	/* Initialize the match. */
56	void (*init)(struct ipt_entry_match *m, unsigned int *nfcache);
57
58	/* Function which parses command options; returns true if it
59           ate an option */
60	int (*parse)(int c, char **argv, int invert, unsigned int *flags,
61		     const struct ipt_entry *entry,
62		     unsigned int *nfcache,
63		     struct ipt_entry_match **match);
64
65	/* Final check; exit if not ok. */
66	void (*final_check)(unsigned int flags);
67
68	/* Prints out the match iff non-NULL: put space at end */
69	void (*print)(const struct ipt_ip *ip,
70		      const struct ipt_entry_match *match, int numeric);
71
72	/* Saves the match info in parsable form to stdout. */
73	void (*save)(const struct ipt_ip *ip,
74		     const struct ipt_entry_match *match);
75
76	/* Pointer to list of extra command-line options */
77	const struct option *extra_opts;
78
79	/* Ignore these men behind the curtain: */
80	unsigned int option_offset;
81	struct ipt_entry_match *m;
82	unsigned int mflags;
83#ifdef NO_SHARED_LIBS
84	unsigned int loaded; /* simulate loading so options are merged properly */
85#endif
86};
87
88struct iptables_target
89{
90	struct iptables_target *next;
91
92	ipt_chainlabel name;
93
94	/* Revision of target (0 by default). */
95	u_int8_t revision;
96
97	const char *version;
98
99	/* Size of target data. */
100	size_t size;
101
102	/* Size of target data relevent for userspace comparison purposes */
103	size_t userspacesize;
104
105	/* Function which prints out usage message. */
106	void (*help)(void);
107
108	/* Initialize the target. */
109	void (*init)(struct ipt_entry_target *t, unsigned int *nfcache);
110
111	/* Function which parses command options; returns true if it
112           ate an option */
113	int (*parse)(int c, char **argv, int invert, unsigned int *flags,
114		     const struct ipt_entry *entry,
115		     struct ipt_entry_target **target);
116
117	/* Final check; exit if not ok. */
118	void (*final_check)(unsigned int flags);
119
120	/* Prints out the target iff non-NULL: put space at end */
121	void (*print)(const struct ipt_ip *ip,
122		      const struct ipt_entry_target *target, int numeric);
123
124	/* Saves the targinfo in parsable form to stdout. */
125	void (*save)(const struct ipt_ip *ip,
126		     const struct ipt_entry_target *target);
127
128	/* Pointer to list of extra command-line options */
129	struct option *extra_opts;
130
131	/* Ignore these men behind the curtain: */
132	unsigned int option_offset;
133	struct ipt_entry_target *t;
134	unsigned int tflags;
135	unsigned int used;
136#ifdef NO_SHARED_LIBS
137	unsigned int loaded; /* simulate loading so options are merged properly */
138#endif
139};
140
141extern int line;
142
143/* Your shared library should call one of these. */
144extern void register_match(struct iptables_match *me);
145extern void register_target(struct iptables_target *me);
146
147extern struct in_addr *dotted_to_addr(const char *dotted);
148extern char *addr_to_dotted(const struct in_addr *addrp);
149extern char *addr_to_anyname(const struct in_addr *addr);
150extern char *mask_to_dotted(const struct in_addr *mask);
151
152extern void parse_hostnetworkmask(const char *name, struct in_addr **addrpp,
153                      struct in_addr *maskp, unsigned int *naddrs);
154extern u_int16_t parse_protocol(const char *s);
155
156extern int do_command(int argc, char *argv[], char **table,
157		      iptc_handle_t *handle);
158/* Keeping track of external matches and targets: linked lists.  */
159extern struct iptables_match *iptables_matches;
160extern struct iptables_target *iptables_targets;
161
162enum ipt_tryload {
163	DONT_LOAD,
164	TRY_LOAD,
165	LOAD_MUST_SUCCEED
166};
167
168extern struct iptables_target *find_target(const char *name, enum ipt_tryload);
169extern struct iptables_match *find_match(const char *name, enum ipt_tryload, struct iptables_rule_match **match);
170
171extern int delete_chain(const ipt_chainlabel chain, int verbose,
172			iptc_handle_t *handle);
173extern int flush_entries(const ipt_chainlabel chain, int verbose,
174			iptc_handle_t *handle);
175extern int for_each_chain(int (*fn)(const ipt_chainlabel, int, iptc_handle_t *),
176		int verbose, int builtinstoo, iptc_handle_t *handle);
177#endif /*_IPTABLES_USER_H*/
178