release/src/router/iproute2/include/iptables.h

   1 #ifndef _IPTABLES_USER_H
   2 #define _IPTABLES_USER_H
   3
   4 #include "iptables_common.h"
   5 #include "libiptc/libiptc.h"
   6
   7 #ifndef IPT_LIB_DIR
   8 #define IPT_LIB_DIR "/usr/local/lib/iptables"
   9 #endif
  10
  11 #ifndef IPPROTO_SCTP
  12 #define IPPROTO_SCTP 132
  13 #endif
  14
  15 #ifndef IPT_SO_GET_REVISION_MATCH /* Old kernel source. */
  16 #define IPT_SO_GET_REVISION_MATCH       (IPT_BASE_CTL + 2)
  17 #define IPT_SO_GET_REVISION_TARGET      (IPT_BASE_CTL + 3)
  18
  19 struct ipt_get_revision
  20 {
  21         char name[IPT_FUNCTION_MAXNAMELEN-1];
  22
  23         u_int8_t revision;
  24 };
  25 #endif /* IPT_SO_GET_REVISION_MATCH   Old kernel source */
  26
  27 struct iptables_rule_match
  28 {
  29         struct iptables_rule_match *next;
  30
  31         struct iptables_match *match;
  32 };
  33
  34 /* Include file for additions: new matches and targets. */
  35 struct iptables_match
  36 {
  37         struct iptables_match *next;
  38
  39         ipt_chainlabel name;
  40
  41         /* Revision of match (0 by default). */
  42         u_int8_t revision;
  43
  44         const char *version;
  45
  46         /* Size of match data. */
  47         size_t size;
  48
  49         /* Size of match data relevent for userspace comparison purposes */
  50         size_t userspacesize;
  51
  52         /* Function which prints out usage message. */
  53         void (*help)(void);
  54
  55         /* Initialize the match. */
  56         void (*init)(struct ipt_entry_match *m, unsigned int *nfcache);
  57
  58         /* Function which parses command options; returns true if it
  59            ate an option */
  60         int (*parse)(int c, char **argv, int invert, unsigned int *flags,
  61                      const struct ipt_entry *entry,
  62                      unsigned int *nfcache,
  63                      struct ipt_entry_match **match);
  64
  65         /* Final check; exit if not ok. */
  66         void (*final_check)(unsigned int flags);
  67
  68         /* Prints out the match iff non-NULL: put space at end */
  69         void (*print)(const struct ipt_ip *ip,
  70                       const struct ipt_entry_match *match, int numeric);
  71
  72         /* Saves the match info in parsable form to stdout. */
  73         void (*save)(const struct ipt_ip *ip,
  74                      const struct ipt_entry_match *match);
  75
  76         /* Pointer to list of extra command-line options */
  77         const struct option *extra_opts;
  78
  79         /* Ignore these men behind the curtain: */
  80         unsigned int option_offset;
  81         struct ipt_entry_match *m;
  82         unsigned int mflags;
  83 #ifdef NO_SHARED_LIBS
  84         unsigned int loaded; /* simulate loading so options are merged properly */
  85 #endif
  86 };
  87
  88 struct iptables_target
  89 {
  90         struct iptables_target *next;
  91
  92         ipt_chainlabel name;
  93
  94         /* Revision of target (0 by default). */
  95         u_int8_t revision;
  96
  97         const char *version;
  98
  99         /* Size of target data. */
 100         size_t size;
 101
 102         /* Size of target data relevent for userspace comparison purposes */
 103         size_t userspacesize;
 104
 105         /* Function which prints out usage message. */
 106         void (*help)(void);
 107
 108         /* Initialize the target. */
 109         void (*init)(struct ipt_entry_target *t, unsigned int *nfcache);
 110
 111         /* Function which parses command options; returns true if it
 112            ate an option */
 113         int (*parse)(int c, char **argv, int invert, unsigned int *flags,
 114                      const struct ipt_entry *entry,
 115                      struct ipt_entry_target **target);
 116
 117         /* Final check; exit if not ok. */
 118         void (*final_check)(unsigned int flags);
 119
 120         /* Prints out the target iff non-NULL: put space at end */
 121         void (*print)(const struct ipt_ip *ip,
 122                       const struct ipt_entry_target *target, int numeric);
 123
 124         /* Saves the targinfo in parsable form to stdout. */
 125         void (*save)(const struct ipt_ip *ip,
 126                      const struct ipt_entry_target *target);
 127
 128         /* Pointer to list of extra command-line options */
 129         struct option *extra_opts;
 130
 131         /* Ignore these men behind the curtain: */
 132         unsigned int option_offset;
 133         struct ipt_entry_target *t;
 134         unsigned int tflags;
 135         unsigned int used;
 136 #ifdef NO_SHARED_LIBS
 137         unsigned int loaded; /* simulate loading so options are merged properly */
 138 #endif
 139 };
 140
 141 extern int line;
 142
 143 /* Your shared library should call one of these. */
 144 extern void register_match(struct iptables_match *me);
 145 extern void register_target(struct iptables_target *me);
 146
 147 extern struct in_addr *dotted_to_addr(const char *dotted);
 148 extern char *addr_to_dotted(const struct in_addr *addrp);
 149 extern char *addr_to_anyname(const struct in_addr *addr);
 150 extern char *mask_to_dotted(const struct in_addr *mask);
 151
 152 extern void parse_hostnetworkmask(const char *name, struct in_addr **addrpp,
 153                       struct in_addr *maskp, unsigned int *naddrs);
 154 extern u_int16_t parse_protocol(const char *s);
 155
 156 extern int do_command(int argc, char *argv[], char **table,
 157                       iptc_handle_t *handle);
 158 /* Keeping track of external matches and targets: linked lists.  */
 159 extern struct iptables_match *iptables_matches;
 160 extern struct iptables_target *iptables_targets;
 161
 162 enum ipt_tryload {
 163         DONT_LOAD,
 164         TRY_LOAD,
 165         LOAD_MUST_SUCCEED
 166 };
 167
 168 extern struct iptables_target *find_target(const char *name, enum ipt_tryload);
 169 extern struct iptables_match *find_match(const char *name, enum ipt_tryload, struct iptables_rule_match **match);
 170
 171 extern int delete_chain(const ipt_chainlabel chain, int verbose,
 172                         iptc_handle_t *handle);
 173 extern int flush_entries(const ipt_chainlabel chain, int verbose,
 174                         iptc_handle_t *handle);
 175 extern int for_each_chain(int (*fn)(const ipt_chainlabel, int, iptc_handle_t *),
 176                 int verbose, int builtinstoo, iptc_handle_t *handle);
 177 #endif /*_IPTABLES_USER_H*/