| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _LIBIPTC_H |
| #define _LIBIPTC_H |
| /* Library which manipulates filtering rules. */ |
| |
| #include <linux/types.h> |
| #include <libiptc/ipt_kernel_headers.h> |
| #ifdef __cplusplus |
| # include <climits> |
| #else |
| # include <limits.h> /* INT_MAX in ip_tables.h */ |
| #endif |
| #include <linux/netfilter_ipv4/ip_tables.h> |
| #include <libiptc/xtcshared.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define iptc_handle xtc_handle |
| #define ipt_chainlabel xt_chainlabel |
| |
| #define IPTC_LABEL_ACCEPT "ACCEPT" |
| #define IPTC_LABEL_DROP "DROP" |
| #define IPTC_LABEL_QUEUE "QUEUE" |
| #define IPTC_LABEL_RETURN "RETURN" |
| |
| /* Does this chain exist? */ |
| int iptc_is_chain(const char *chain, struct xtc_handle *const handle); |
| |
| /* Take a snapshot of the rules. Returns NULL on error. */ |
| struct xtc_handle *iptc_init(const char *tablename); |
| |
| /* Cleanup after iptc_init(). */ |
| void iptc_free(struct xtc_handle *h); |
| |
| /* Iterator functions to run through the chains. Returns NULL at end. */ |
| const char *iptc_first_chain(struct xtc_handle *handle); |
| const char *iptc_next_chain(struct xtc_handle *handle); |
| |
| /* Get first rule in the given chain: NULL for empty chain. */ |
| const struct ipt_entry *iptc_first_rule(const char *chain, |
| struct xtc_handle *handle); |
| |
| /* Returns NULL when rules run out. */ |
| const struct ipt_entry *iptc_next_rule(const struct ipt_entry *prev, |
| struct xtc_handle *handle); |
| |
| /* Returns a pointer to the target name of this entry. */ |
| const char *iptc_get_target(const struct ipt_entry *e, |
| struct xtc_handle *handle); |
| |
| /* Is this a built-in chain? */ |
| int iptc_builtin(const char *chain, struct xtc_handle *const handle); |
| |
| /* Get the policy of a given built-in chain */ |
| const char *iptc_get_policy(const char *chain, |
| struct xt_counters *counter, |
| 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 `e' in chain `chain' into position `rulenum'. */ |
| int iptc_insert_entry(const xt_chainlabel chain, |
| const struct ipt_entry *e, |
| unsigned int rulenum, |
| struct xtc_handle *handle); |
| |
| /* Atomically replace rule `rulenum' in `chain' with `e'. */ |
| int iptc_replace_entry(const xt_chainlabel chain, |
| const struct ipt_entry *e, |
| unsigned int rulenum, |
| struct xtc_handle *handle); |
| |
| /* Append entry `e' to chain `chain'. Equivalent to insert with |
| rulenum = length of chain. */ |
| int iptc_append_entry(const xt_chainlabel chain, |
| const struct ipt_entry *e, |
| struct xtc_handle *handle); |
| |
| /* Check whether a mathching rule exists */ |
| int iptc_check_entry(const xt_chainlabel chain, |
| const struct ipt_entry *origfw, |
| unsigned char *matchmask, |
| struct xtc_handle *handle); |
| |
| /* Delete the first rule in `chain' which matches `e', subject to |
| matchmask (array of length == origfw) */ |
| int iptc_delete_entry(const xt_chainlabel chain, |
| const struct ipt_entry *origfw, |
| unsigned char *matchmask, |
| struct xtc_handle *handle); |
| |
| /* Delete the rule in position `rulenum' in `chain'. */ |
| int iptc_delete_num_entry(const xt_chainlabel chain, |
| unsigned int rulenum, |
| struct xtc_handle *handle); |
| |
| /* Check the packet `e' on chain `chain'. Returns the verdict, or |
| NULL and sets errno. */ |
| const char *iptc_check_packet(const xt_chainlabel chain, |
| struct ipt_entry *entry, |
| struct xtc_handle *handle); |
| |
| /* Flushes the entries in the given chain (ie. empties chain). */ |
| int iptc_flush_entries(const xt_chainlabel chain, |
| struct xtc_handle *handle); |
| |
| /* Zeroes the counters in a chain. */ |
| int iptc_zero_entries(const xt_chainlabel chain, |
| struct xtc_handle *handle); |
| |
| /* Creates a new chain. */ |
| int iptc_create_chain(const xt_chainlabel chain, |
| struct xtc_handle *handle); |
| |
| /* Deletes a chain. */ |
| int iptc_delete_chain(const xt_chainlabel chain, |
| struct xtc_handle *handle); |
| |
| /* Renames a chain. */ |
| int iptc_rename_chain(const xt_chainlabel oldname, |
| const xt_chainlabel newname, |
| struct xtc_handle *handle); |
| |
| /* Sets the policy on a built-in chain. */ |
| int iptc_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 iptc_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 *iptc_read_counter(const xt_chainlabel chain, |
| unsigned int rulenum, |
| struct xtc_handle *handle); |
| |
| /* zero packet and byte counters for a specific rule */ |
| int iptc_zero_counter(const xt_chainlabel chain, |
| unsigned int rulenum, |
| struct xtc_handle *handle); |
| |
| /* set packet and byte counters for a specific rule */ |
| int iptc_set_counter(const xt_chainlabel chain, |
| unsigned int rulenum, |
| struct xt_counters *counters, |
| struct xtc_handle *handle); |
| |
| /* Makes the actual changes. */ |
| int iptc_commit(struct xtc_handle *handle); |
| |
| /* Get raw socket. */ |
| int iptc_get_raw_socket(void); |
| |
| /* Translates errno numbers into more human-readable form than strerror. */ |
| const char *iptc_strerror(int err); |
| |
| extern void dump_entries(struct xtc_handle *const); |
| |
| extern const struct xtc_ops iptc_ops; |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| |
| #endif /* _LIBIPTC_H */ |