| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _LIBIP6TC_H |
| #define _LIBIP6TC_H |
| /* Library which manipulates firewall rules. Version 0.2. */ |
| |
| #include <linux/types.h> |
| #include <libiptc/ipt_kernel_headers.h> |
| #ifdef __cplusplus |
| # include <climits> |
| #else |
| # include <limits.h> /* INT_MAX in ip6_tables.h */ |
| #endif |
| #include <linux/netfilter_ipv6/ip6_tables.h> |
| #include <libiptc/xtcshared.h> |
| |
| #define ip6tc_handle xtc_handle |
| #define ip6t_chainlabel xt_chainlabel |
| |
| #define IP6TC_LABEL_ACCEPT "ACCEPT" |
| #define IP6TC_LABEL_DROP "DROP" |
| #define IP6TC_LABEL_QUEUE "QUEUE" |
| #define IP6TC_LABEL_RETURN "RETURN" |
| |
| /* Does this chain exist? */ |
| int ip6tc_is_chain(const char *chain, struct xtc_handle *const handle); |
| |
| /* Take a snapshot of the rules. Returns NULL on error. */ |
| struct xtc_handle *ip6tc_init(const char *tablename); |
| |
| /* Cleanup after ip6tc_init(). */ |
| void ip6tc_free(struct xtc_handle *h); |
| |
| /* Iterator functions to run through the chains. Returns NULL at end. */ |
| const char *ip6tc_first_chain(struct xtc_handle *handle); |
| const char *ip6tc_next_chain(struct xtc_handle *handle); |
| |
| /* Get first rule in the given chain: NULL for empty chain. */ |
| const struct ip6t_entry *ip6tc_first_rule(const char *chain, |
| struct xtc_handle *handle); |
| |
| /* Returns NULL when rules run out. */ |
| const struct ip6t_entry *ip6tc_next_rule(const struct ip6t_entry *prev, |
| struct xtc_handle *handle); |
| |
| /* Returns a pointer to the target name of this position. */ |
| const char *ip6tc_get_target(const struct ip6t_entry *e, |
| struct xtc_handle *handle); |
| |
| /* Is this a built-in chain? */ |
| int ip6tc_builtin(const char *chain, struct xtc_handle *const handle); |
| |
| /* Get the policy of a given built-in chain */ |
| const char *ip6tc_get_policy(const char *chain, |
| struct xt_counters *counters, |
| struct xtc_handle *handle); |
| |
| /* These functions return TRUE for OK or 0 and set errno. If errno == |
| 0, it means there was a version error (ie. upgrade libiptc). */ |
| /* Rule numbers start at 1 for the first rule. */ |
| |
| /* Insert the entry `fw' in chain `chain' into position `rulenum'. */ |
| int ip6tc_insert_entry(const xt_chainlabel chain, |
| const struct ip6t_entry *e, |
| unsigned int rulenum, |
| struct xtc_handle *handle); |
| |
| /* Atomically replace rule `rulenum' in `chain' with `fw'. */ |
| int ip6tc_replace_entry(const xt_chainlabel chain, |
| const struct ip6t_entry *e, |
| unsigned int rulenum, |
| struct xtc_handle *handle); |
| |
| /* Append entry `fw' to chain `chain'. Equivalent to insert with |
| rulenum = length of chain. */ |
| int ip6tc_append_entry(const xt_chainlabel chain, |
| const struct ip6t_entry *e, |
| struct xtc_handle *handle); |
| |
| /* Check whether a matching rule exists */ |
| int ip6tc_check_entry(const xt_chainlabel chain, |
| const struct ip6t_entry *origfw, |
| unsigned char *matchmask, |
| struct xtc_handle *handle); |
| |
| /* Delete the first rule in `chain' which matches `fw'. */ |
| int ip6tc_delete_entry(const xt_chainlabel chain, |
| const struct ip6t_entry *origfw, |
| unsigned char *matchmask, |
| struct xtc_handle *handle); |
| |
| /* Delete the rule in position `rulenum' in `chain'. */ |
| int ip6tc_delete_num_entry(const xt_chainlabel chain, |
| unsigned int rulenum, |
| struct xtc_handle *handle); |
| |
| /* Check the packet `fw' on chain `chain'. Returns the verdict, or |
| NULL and sets errno. */ |
| const char *ip6tc_check_packet(const xt_chainlabel chain, |
| struct ip6t_entry *, |
| struct xtc_handle *handle); |
| |
| /* Flushes the entries in the given chain (ie. empties chain). */ |
| int ip6tc_flush_entries(const xt_chainlabel chain, |
| struct xtc_handle *handle); |
| |
| /* Zeroes the counters in a chain. */ |
| int ip6tc_zero_entries(const xt_chainlabel chain, |
| struct xtc_handle *handle); |
| |
| /* Creates a new chain. */ |
| int ip6tc_create_chain(const xt_chainlabel chain, |
| struct xtc_handle *handle); |
| |
| /* Deletes a chain. */ |
| int ip6tc_delete_chain(const xt_chainlabel chain, |
| struct xtc_handle *handle); |
| |
| /* Renames a chain. */ |
| int ip6tc_rename_chain(const xt_chainlabel oldname, |
| const xt_chainlabel newname, |
| struct xtc_handle *handle); |
| |
| /* Sets the policy on a built-in chain. */ |
| int ip6tc_set_policy(const xt_chainlabel chain, |
| const xt_chainlabel policy, |
| struct xt_counters *counters, |
| struct xtc_handle *handle); |
| |
| /* Get the number of references to this chain */ |
| int ip6tc_get_references(unsigned int *ref, const xt_chainlabel chain, |
| struct xtc_handle *handle); |
| |
| /* read packet and byte counters for a specific rule */ |
| struct xt_counters *ip6tc_read_counter(const xt_chainlabel chain, |
| unsigned int rulenum, |
| struct xtc_handle *handle); |
| |
| /* zero packet and byte counters for a specific rule */ |
| int ip6tc_zero_counter(const xt_chainlabel chain, |
| unsigned int rulenum, |
| struct xtc_handle *handle); |
| |
| /* set packet and byte counters for a specific rule */ |
| int ip6tc_set_counter(const xt_chainlabel chain, |
| unsigned int rulenum, |
| struct xt_counters *counters, |
| struct xtc_handle *handle); |
| |
| /* Makes the actual changes. */ |
| int ip6tc_commit(struct xtc_handle *handle); |
| |
| /* Get raw socket. */ |
| int ip6tc_get_raw_socket(void); |
| |
| /* Translates errno numbers into more human-readable form than strerror. */ |
| const char *ip6tc_strerror(int err); |
| |
| extern void dump_entries6(struct xtc_handle *const); |
| |
| extern const struct xtc_ops ip6tc_ops; |
| |
| #endif /* _LIBIP6TC_H */ |