Lines Matching defs:*
0 #ifndef _LIBIP6TC_H
2 #define _LIBIP6TC_H
3 /* Library which manipulates firewall rules. Version 0.2. */
5 #include <libiptc/ipt_kernel_headers.h>
6 #include <linux/netfilter_ipv6/ip6_tables.h>
8 #ifndef IP6T_MIN_ALIGN
9 #define IP6T_MIN_ALIGN (__alignof__(struct ip6t_entry))
10 #endif
11 #define IP6T_ALIGN(s) (((s) + (IP6T_MIN_ALIGN-1)) & ~(IP6T_MIN_ALIGN-1))
13 typedef char ip6t_chainlabel[32];
15 #define IP6TC_LABEL_ACCEPT "ACCEPT"
16 #define IP6TC_LABEL_DROP "DROP"
17 #define IP6TC_LABEL_QUEUE "QUEUE"
18 #define IP6TC_LABEL_RETURN "RETURN"
20 /* Transparent handle type. */
21 typedef struct ip6tc_handle *ip6tc_handle_t;
23 /* Does this chain exist? */
24 int ip6tc_is_chain(const char *chain, const ip6tc_handle_t handle);
26 /* Take a snapshot of the rules. Returns NULL on error. */
27 ip6tc_handle_t ip6tc_init(const char *tablename);
29 /* Cleanup after ip6tc_init(). */
30 void ip6tc_free(ip6tc_handle_t *h);
32 /* Iterator functions to run through the chains. Returns NULL at end. */
33 const char *ip6tc_first_chain(ip6tc_handle_t *handle);
34 const char *ip6tc_next_chain(ip6tc_handle_t *handle);
36 /* Get first rule in the given chain: NULL for empty chain. */
37 const struct ip6t_entry *ip6tc_first_rule(const char *chain,
38 ip6tc_handle_t *handle);
40 /* Returns NULL when rules run out. */
41 const struct ip6t_entry *ip6tc_next_rule(const struct ip6t_entry *prev,
42 ip6tc_handle_t *handle);
44 /* Returns a pointer to the target name of this position. */
45 const char *ip6tc_get_target(const struct ip6t_entry *e,
46 ip6tc_handle_t *handle);
48 /* Is this a built-in chain? */
49 int ip6tc_builtin(const char *chain, const ip6tc_handle_t handle);
51 /* Get the policy of a given built-in chain */
52 const char *ip6tc_get_policy(const char *chain,
53 struct ip6t_counters *counters,
54 ip6tc_handle_t *handle);
56 /* These functions return TRUE for OK or 0 and set errno. If errno ==
57 0, it means there was a version error (ie. upgrade libiptc). */
58 /* Rule numbers start at 1 for the first rule. */
60 /* Insert the entry `fw' in chain `chain' into position `rulenum'. */
61 int ip6tc_insert_entry(const ip6t_chainlabel chain,
62 const struct ip6t_entry *e,
63 unsigned int rulenum,
64 ip6tc_handle_t *handle);
66 /* Atomically replace rule `rulenum' in `chain' with `fw'. */
67 int ip6tc_replace_entry(const ip6t_chainlabel chain,
68 const struct ip6t_entry *e,
69 unsigned int rulenum,
70 ip6tc_handle_t *handle);
72 /* Append entry `fw' to chain `chain'. Equivalent to insert with
73 rulenum = length of chain. */
74 int ip6tc_append_entry(const ip6t_chainlabel chain,
75 const struct ip6t_entry *e,
76 ip6tc_handle_t *handle);
78 /* Delete the first rule in `chain' which matches `fw'. */
79 int ip6tc_delete_entry(const ip6t_chainlabel chain,
80 const struct ip6t_entry *origfw,
81 unsigned char *matchmask,
82 ip6tc_handle_t *handle);
84 /* Delete the rule in position `rulenum' in `chain'. */
85 int ip6tc_delete_num_entry(const ip6t_chainlabel chain,
86 unsigned int rulenum,
87 ip6tc_handle_t *handle);
89 /* Check the packet `fw' on chain `chain'. Returns the verdict, or
90 NULL and sets errno. */
91 const char *ip6tc_check_packet(const ip6t_chainlabel chain,
92 struct ip6t_entry *,
93 ip6tc_handle_t *handle);
95 /* Flushes the entries in the given chain (ie. empties chain). */
96 int ip6tc_flush_entries(const ip6t_chainlabel chain,
97 ip6tc_handle_t *handle);
99 /* Zeroes the counters in a chain. */
100 int ip6tc_zero_entries(const ip6t_chainlabel chain,
101 ip6tc_handle_t *handle);
103 /* Creates a new chain. */
104 int ip6tc_create_chain(const ip6t_chainlabel chain,
105 ip6tc_handle_t *handle);
107 /* Deletes a chain. */
108 int ip6tc_delete_chain(const ip6t_chainlabel chain,
109 ip6tc_handle_t *handle);
111 /* Renames a chain. */
112 int ip6tc_rename_chain(const ip6t_chainlabel oldname,
113 const ip6t_chainlabel newname,
114 ip6tc_handle_t *handle);
116 /* Sets the policy on a built-in chain. */
117 int ip6tc_set_policy(const ip6t_chainlabel chain,
118 const ip6t_chainlabel policy,
119 struct ip6t_counters *counters,
120 ip6tc_handle_t *handle);
122 /* Get the number of references to this chain */
123 int ip6tc_get_references(unsigned int *ref, const ip6t_chainlabel chain,
124 ip6tc_handle_t *handle);
126 /* read packet and byte counters for a specific rule */
127 struct ip6t_counters *ip6tc_read_counter(const ip6t_chainlabel chain,
128 unsigned int rulenum,
129 ip6tc_handle_t *handle);
131 /* zero packet and byte counters for a specific rule */
132 int ip6tc_zero_counter(const ip6t_chainlabel chain,
133 unsigned int rulenum,
134 ip6tc_handle_t *handle);
136 /* set packet and byte counters for a specific rule */
137 int ip6tc_set_counter(const ip6t_chainlabel chain,
138 unsigned int rulenum,
139 struct ip6t_counters *counters,
140 ip6tc_handle_t *handle);
142 /* Makes the actual changes. */
143 int ip6tc_commit(ip6tc_handle_t *handle);
145 /* Get raw socket. */
146 int ip6tc_get_raw_socket();
148 /* Translates errno numbers into more human-readable form than strerror. */
149 const char *ip6tc_strerror(int err);
151 /* Return prefix length, or -1 if not contiguous */
152 int ipv6_prefix_length(const struct in6_addr *a);
154 #endif /* _LIBIP6TC_H */