--- /dev/null
+#ifndef _IPTABLES_USER_H
+#define _IPTABLES_USER_H
+
+#include "iptables_common.h"
+#include "libiptc/libiptc.h"
+
+#ifndef IPPROTO_SCTP
+#define IPPROTO_SCTP 132
+#endif
+
+struct iptables_rule_match
+{
+ struct iptables_rule_match *next;
+
+ struct iptables_match *match;
+};
+
+/* Include file for additions: new matches and targets. */
+struct iptables_match
+{
+ struct iptables_match *next;
+
+ ipt_chainlabel name;
+
+ const char *version;
+
+ /* Size of match data. */
+ size_t size;
+
+ /* Size of match data relevent for userspace comparison purposes */
+ size_t userspacesize;
+
+ /* Function which prints out usage message. */
+ void (*help)(void);
+
+ /* Initialize the match. */
+ void (*init)(struct ipt_entry_match *m, unsigned int *nfcache);
+
+ /* Function which parses command options; returns true if it
+ ate an option */
+ int (*parse)(int c, char **argv, int invert, unsigned int *flags,
+ const struct ipt_entry *entry,
+ unsigned int *nfcache,
+ struct ipt_entry_match **match);
+
+ /* Final check; exit if not ok. */
+ void (*final_check)(unsigned int flags);
+
+ /* Prints out the match iff non-NULL: put space at end */
+ void (*print)(const struct ipt_ip *ip,
+ const struct ipt_entry_match *match, int numeric);
+
+ /* Saves the match info in parsable form to stdout. */
+ void (*save)(const struct ipt_ip *ip,
+ const struct ipt_entry_match *match);
+
+ /* Pointer to list of extra command-line options */
+ const struct option *extra_opts;
+
+ /* Ignore these men behind the curtain: */
+ unsigned int option_offset;
+ struct ipt_entry_match *m;
+ unsigned int mflags;
+#ifdef NO_SHARED_LIBS
+ unsigned int loaded; /* simulate loading so options are merged properly */
+#endif
+};
+
+struct iptables_target
+{
+ struct iptables_target *next;
+
+ ipt_chainlabel name;
+
+ const char *version;
+
+ /* Size of target data. */
+ size_t size;
+
+ /* Size of target data relevent for userspace comparison purposes */
+ size_t userspacesize;
+
+ /* Function which prints out usage message. */
+ void (*help)(void);
+
+ /* Initialize the target. */
+ void (*init)(struct ipt_entry_target *t, unsigned int *nfcache);
+
+ /* Function which parses command options; returns true if it
+ ate an option */
+ int (*parse)(int c, char **argv, int invert, unsigned int *flags,
+ const struct ipt_entry *entry,
+ struct ipt_entry_target **target);
+
+ /* Final check; exit if not ok. */
+ void (*final_check)(unsigned int flags);
+
+ /* Prints out the target iff non-NULL: put space at end */
+ void (*print)(const struct ipt_ip *ip,
+ const struct ipt_entry_target *target, int numeric);
+
+ /* Saves the targinfo in parsable form to stdout. */
+ void (*save)(const struct ipt_ip *ip,
+ const struct ipt_entry_target *target);
+
+ /* Pointer to list of extra command-line options */
+ struct option *extra_opts;
+
+ /* Ignore these men behind the curtain: */
+ unsigned int option_offset;
+ struct ipt_entry_target *t;
+ unsigned int tflags;
+ unsigned int used;
+#ifdef NO_SHARED_LIBS
+ unsigned int loaded; /* simulate loading so options are merged properly */
+#endif
+};
+
+extern int line;
+
+/* Your shared library should call one of these. */
+extern void register_match(struct iptables_match *me);
+extern void register_target(struct iptables_target *me);
+
+extern struct in_addr *dotted_to_addr(const char *dotted);
+extern char *addr_to_dotted(const struct in_addr *addrp);
+extern char *addr_to_anyname(const struct in_addr *addr);
+extern char *mask_to_dotted(const struct in_addr *mask);
+
+extern void parse_hostnetworkmask(const char *name, struct in_addr **addrpp,
+ struct in_addr *maskp, unsigned int *naddrs);
+extern u_int16_t parse_protocol(const char *s);
+
+extern int do_command(int argc, char *argv[], char **table,
+ iptc_handle_t *handle);
+/* Keeping track of external matches and targets: linked lists. */
+extern struct iptables_match *iptables_matches;
+extern struct iptables_target *iptables_targets;
+
+enum ipt_tryload {
+ DONT_LOAD,
+ TRY_LOAD,
+ LOAD_MUST_SUCCEED
+};
+
+extern struct iptables_target *find_target(const char *name, enum ipt_tryload);
+extern struct iptables_match *find_match(const char *name, enum ipt_tryload, struct iptables_rule_match **match);
+
+extern int delete_chain(const ipt_chainlabel chain, int verbose,
+ iptc_handle_t *handle);
+extern int flush_entries(const ipt_chainlabel chain, int verbose,
+ iptc_handle_t *handle);
+extern int for_each_chain(int (*fn)(const ipt_chainlabel, int, iptc_handle_t *),
+ int verbose, int builtinstoo, iptc_handle_t *handle);
+#endif /*_IPTABLES_USER_H*/