Lines Matching defs:*
0 #ifndef _LIBIPTC_H
2 #define _LIBIPTC_H
3 /* Library which manipulates filtering rules. */
5 #include <libiptc/ipt_kernel_headers.h>
6 #include <linux/netfilter_ipv4/ip_tables.h>
8 #ifdef __cplusplus
9 extern "C" {
10 #endif
12 #ifndef IPT_MIN_ALIGN
13 /* ipt_entry has pointers and u_int64_t's in it, so if you align to
14 it, you'll also align to any crazy matches and targets someone
15 might write */
16 #define IPT_MIN_ALIGN (__alignof__(struct ipt_entry))
17 #endif
19 #define IPT_ALIGN(s) (((s) + ((IPT_MIN_ALIGN)-1)) & ~((IPT_MIN_ALIGN)-1))
21 typedef char ipt_chainlabel[32];
23 #define IPTC_LABEL_ACCEPT "ACCEPT"
24 #define IPTC_LABEL_DROP "DROP"
25 #define IPTC_LABEL_QUEUE "QUEUE"
26 #define IPTC_LABEL_RETURN "RETURN"
28 /* Transparent handle type. */
29 typedef struct iptc_handle *iptc_handle_t;
31 /* Does this chain exist? */
32 int iptc_is_chain(const char *chain, const iptc_handle_t handle);
34 /* Take a snapshot of the rules. Returns NULL on error. */
35 iptc_handle_t iptc_init(const char *tablename);
37 /* Cleanup after iptc_init(). */
38 void iptc_free(iptc_handle_t *h);
40 /* Iterator functions to run through the chains. Returns NULL at end. */
41 const char *iptc_first_chain(iptc_handle_t *handle);
42 const char *iptc_next_chain(iptc_handle_t *handle);
44 /* Get first rule in the given chain: NULL for empty chain. */
45 const struct ipt_entry *iptc_first_rule(const char *chain,
46 iptc_handle_t *handle);
48 /* Returns NULL when rules run out. */
49 const struct ipt_entry *iptc_next_rule(const struct ipt_entry *prev,
50 iptc_handle_t *handle);
52 /* Returns a pointer to the target name of this entry. */
53 const char *iptc_get_target(const struct ipt_entry *e,
54 iptc_handle_t *handle);
56 /* Is this a built-in chain? */
57 int iptc_builtin(const char *chain, const iptc_handle_t handle);
59 /* Get the policy of a given built-in chain */
60 const char *iptc_get_policy(const char *chain,
61 struct ipt_counters *counter,
62 iptc_handle_t *handle);
64 /* These functions return TRUE for OK or 0 and set errno. If errno ==
65 0, it means there was a version error (ie. upgrade libiptc). */
66 /* Rule numbers start at 1 for the first rule. */
68 /* Insert the entry `e' in chain `chain' into position `rulenum'. */
69 int iptc_insert_entry(const ipt_chainlabel chain,
70 const struct ipt_entry *e,
71 unsigned int rulenum,
72 iptc_handle_t *handle);
74 /* Atomically replace rule `rulenum' in `chain' with `e'. */
75 int iptc_replace_entry(const ipt_chainlabel chain,
76 const struct ipt_entry *e,
77 unsigned int rulenum,
78 iptc_handle_t *handle);
80 /* Append entry `e' to chain `chain'. Equivalent to insert with
81 rulenum = length of chain. */
82 int iptc_append_entry(const ipt_chainlabel chain,
83 const struct ipt_entry *e,
84 iptc_handle_t *handle);
86 /* Delete the first rule in `chain' which matches `e', subject to
87 matchmask (array of length == origfw) */
88 int iptc_delete_entry(const ipt_chainlabel chain,
89 const struct ipt_entry *origfw,
90 unsigned char *matchmask,
91 iptc_handle_t *handle);
93 /* Delete the rule in position `rulenum' in `chain'. */
94 int iptc_delete_num_entry(const ipt_chainlabel chain,
95 unsigned int rulenum,
96 iptc_handle_t *handle);
98 /* Check the packet `e' on chain `chain'. Returns the verdict, or
99 NULL and sets errno. */
100 const char *iptc_check_packet(const ipt_chainlabel chain,
101 struct ipt_entry *entry,
102 iptc_handle_t *handle);
104 /* Flushes the entries in the given chain (ie. empties chain). */
105 int iptc_flush_entries(const ipt_chainlabel chain,
106 iptc_handle_t *handle);
108 /* Zeroes the counters in a chain. */
109 int iptc_zero_entries(const ipt_chainlabel chain,
110 iptc_handle_t *handle);
112 /* Creates a new chain. */
113 int iptc_create_chain(const ipt_chainlabel chain,
114 iptc_handle_t *handle);
116 /* Deletes a chain. */
117 int iptc_delete_chain(const ipt_chainlabel chain,
118 iptc_handle_t *handle);
120 /* Renames a chain. */
121 int iptc_rename_chain(const ipt_chainlabel oldname,
122 const ipt_chainlabel newname,
123 iptc_handle_t *handle);
125 /* Sets the policy on a built-in chain. */
126 int iptc_set_policy(const ipt_chainlabel chain,
127 const ipt_chainlabel policy,
128 struct ipt_counters *counters,
129 iptc_handle_t *handle);
131 /* Get the number of references to this chain */
132 int iptc_get_references(unsigned int *ref,
133 const ipt_chainlabel chain,
134 iptc_handle_t *handle);
136 /* read packet and byte counters for a specific rule */
137 struct ipt_counters *iptc_read_counter(const ipt_chainlabel chain,
138 unsigned int rulenum,
139 iptc_handle_t *handle);
141 /* zero packet and byte counters for a specific rule */
142 int iptc_zero_counter(const ipt_chainlabel chain,
143 unsigned int rulenum,
144 iptc_handle_t *handle);
146 /* set packet and byte counters for a specific rule */
147 int iptc_set_counter(const ipt_chainlabel chain,
148 unsigned int rulenum,
149 struct ipt_counters *counters,
150 iptc_handle_t *handle);
152 /* Makes the actual changes. */
153 int iptc_commit(iptc_handle_t *handle);
155 /* Get raw socket. */
156 int iptc_get_raw_socket(void);
158 /* Translates errno numbers into more human-readable form than strerror. */
159 const char *iptc_strerror(int err);
161 #ifdef __cplusplus
163 #endif
166 #endif /* _LIBIPTC_H */