Lines Matching defs:*
0 #ifndef _LIBIPTC_H
2 #define _LIBIPTC_H
3 /* Library which manipulates filtering rules. */
5 #include <linux/types.h>
6 #include <libiptc/ipt_kernel_headers.h>
7 #ifdef __cplusplus
8 # include <climits>
9 #else
10 # include <limits.h> /* INT_MAX in ip_tables.h */
11 #endif
12 #include <linux/netfilter_ipv4/ip_tables.h>
14 #ifdef __cplusplus
15 extern "C" {
16 #endif
18 struct iptc_handle;
20 typedef char ipt_chainlabel[32];
22 #define IPTC_LABEL_ACCEPT "ACCEPT"
23 #define IPTC_LABEL_DROP "DROP"
24 #define IPTC_LABEL_QUEUE "QUEUE"
25 #define IPTC_LABEL_RETURN "RETURN"
27 /* Does this chain exist? */
28 int iptc_is_chain(const char *chain, struct iptc_handle *const handle);
30 /* Take a snapshot of the rules. Returns NULL on error. */
31 struct iptc_handle *iptc_init(const char *tablename);
33 /* Cleanup after iptc_init(). */
34 void iptc_free(struct iptc_handle *h);
36 /* Iterator functions to run through the chains. Returns NULL at end. */
37 const char *iptc_first_chain(struct iptc_handle *handle);
38 const char *iptc_next_chain(struct iptc_handle *handle);
40 /* Get first rule in the given chain: NULL for empty chain. */
41 const struct ipt_entry *iptc_first_rule(const char *chain,
42 struct iptc_handle *handle);
44 /* Returns NULL when rules run out. */
45 const struct ipt_entry *iptc_next_rule(const struct ipt_entry *prev,
46 struct iptc_handle *handle);
48 /* Returns a pointer to the target name of this entry. */
49 const char *iptc_get_target(const struct ipt_entry *e,
50 struct iptc_handle *handle);
52 /* Is this a built-in chain? */
53 int iptc_builtin(const char *chain, struct iptc_handle *const handle);
55 /* Get the policy of a given built-in chain */
56 const char *iptc_get_policy(const char *chain,
57 struct ipt_counters *counter,
58 struct iptc_handle *handle);
60 /* These functions return TRUE for OK or 0 and set errno. If errno ==
61 0, it means there was a version error (ie. upgrade libiptc). */
62 /* Rule numbers start at 1 for the first rule. */
64 /* Insert the entry `e' in chain `chain' into position `rulenum'. */
65 int iptc_insert_entry(const ipt_chainlabel chain,
66 const struct ipt_entry *e,
67 unsigned int rulenum,
68 struct iptc_handle *handle);
70 /* Atomically replace rule `rulenum' in `chain' with `e'. */
71 int iptc_replace_entry(const ipt_chainlabel chain,
72 const struct ipt_entry *e,
73 unsigned int rulenum,
74 struct iptc_handle *handle);
76 /* Append entry `e' to chain `chain'. Equivalent to insert with
77 rulenum = length of chain. */
78 int iptc_append_entry(const ipt_chainlabel chain,
79 const struct ipt_entry *e,
80 struct iptc_handle *handle);
82 /* Check whether a mathching rule exists */
83 int iptc_check_entry(const ipt_chainlabel chain,
84 const struct ipt_entry *origfw,
85 unsigned char *matchmask,
86 struct iptc_handle *handle);
88 /* Delete the first rule in `chain' which matches `e', subject to
89 matchmask (array of length == origfw) */
90 int iptc_delete_entry(const ipt_chainlabel chain,
91 const struct ipt_entry *origfw,
92 unsigned char *matchmask,
93 struct iptc_handle *handle);
95 /* Delete the rule in position `rulenum' in `chain'. */
96 int iptc_delete_num_entry(const ipt_chainlabel chain,
97 unsigned int rulenum,
98 struct iptc_handle *handle);
100 /* Check the packet `e' on chain `chain'. Returns the verdict, or
101 NULL and sets errno. */
102 const char *iptc_check_packet(const ipt_chainlabel chain,
103 struct ipt_entry *entry,
104 struct iptc_handle *handle);
106 /* Flushes the entries in the given chain (ie. empties chain). */
107 int iptc_flush_entries(const ipt_chainlabel chain,
108 struct iptc_handle *handle);
110 /* Zeroes the counters in a chain. */
111 int iptc_zero_entries(const ipt_chainlabel chain,
112 struct iptc_handle *handle);
114 /* Creates a new chain. */
115 int iptc_create_chain(const ipt_chainlabel chain,
116 struct iptc_handle *handle);
118 /* Deletes a chain. */
119 int iptc_delete_chain(const ipt_chainlabel chain,
120 struct iptc_handle *handle);
122 /* Renames a chain. */
123 int iptc_rename_chain(const ipt_chainlabel oldname,
124 const ipt_chainlabel newname,
125 struct iptc_handle *handle);
127 /* Sets the policy on a built-in chain. */
128 int iptc_set_policy(const ipt_chainlabel chain,
129 const ipt_chainlabel policy,
130 struct ipt_counters *counters,
131 struct iptc_handle *handle);
133 /* Get the number of references to this chain */
134 int iptc_get_references(unsigned int *ref,
135 const ipt_chainlabel chain,
136 struct iptc_handle *handle);
138 /* read packet and byte counters for a specific rule */
139 struct ipt_counters *iptc_read_counter(const ipt_chainlabel chain,
140 unsigned int rulenum,
141 struct iptc_handle *handle);
143 /* zero packet and byte counters for a specific rule */
144 int iptc_zero_counter(const ipt_chainlabel chain,
145 unsigned int rulenum,
146 struct iptc_handle *handle);
148 /* set packet and byte counters for a specific rule */
149 int iptc_set_counter(const ipt_chainlabel chain,
150 unsigned int rulenum,
151 struct ipt_counters *counters,
152 struct iptc_handle *handle);
154 /* Makes the actual changes. */
155 int iptc_commit(struct iptc_handle *handle);
157 /* Get raw socket. */
158 int iptc_get_raw_socket(void);
160 /* Translates errno numbers into more human-readable form than strerror. */
161 const char *iptc_strerror(int err);
163 extern void dump_entries(struct iptc_handle *const);
165 #ifdef __cplusplus
167 #endif
170 #endif /* _LIBIPTC_H */