diff options
Diffstat (limited to 'include/xtables.h.in')
| -rw-r--r-- | include/xtables.h.in | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/include/xtables.h.in b/include/xtables.h.in index c71839e1..3bdf7248 100644 --- a/include/xtables.h.in +++ b/include/xtables.h.in @@ -10,6 +10,8 @@ #include <sys/types.h> #include <limits.h> #include <stdbool.h> +#include <stddef.h> +#include <stdint.h> #include <netinet/in.h> #include <net/if.h> #include <linux/types.h> @@ -34,6 +36,89 @@ struct in_addr; +/* + * .size is here so that there is a somewhat reasonable check + * against the chosen .type. + */ +#define XTOPT_POINTER(stype, member) \ + .ptroff = offsetof(stype, member), \ + .size = sizeof(((stype *)NULL)->member) +#define XTOPT_TABLEEND {.name = NULL} + +/** + * %XTTYPE_NONE: option takes no argument + * %XTTYPE_UINT*: standard integer + */ +enum xt_option_type { + XTTYPE_NONE, + XTTYPE_UINT32, +}; + +/** + * %XTOPT_INVERT: option is invertible (usable with !) + * %XTOPT_MAND: option is mandatory + * %XTOPT_MULTI: option may be specified multiple times + * %XTOPT_PUT: store value into memory at @ptroff + */ +enum xt_option_flags { + XTOPT_INVERT = 1 << 0, + XTOPT_MAND = 1 << 1, + XTOPT_MULTI = 1 << 2, + XTOPT_PUT = 1 << 3, +}; + +/** + * @name: name of option + * @type: type of input and validation method, see %XTTYPE_* + * @id: unique number (within extension) for option, 0-31 + * @excl: bitmask of flags that cannot be used with this option + * @also: bitmask of flags that must be used with this option + * @flags: bitmask of option flags, see %XTOPT_* + * @ptroff: offset into private structure for member + * @size: size of the item pointed to by @ptroff; this is a safeguard + * @min: lowest allowed value (for singular integral types) + * @max: highest allowed value (for singular integral types) + */ +struct xt_option_entry { + const char *name; + enum xt_option_type type; + unsigned int id, excl, also, flags; + unsigned int ptroff; + size_t size; + unsigned int min, max; +}; + +/** + * @arg: input from command line + * @ext_name: name of extension currently being processed + * @entry: current option being processed + * @data: per-extension data block + * @xflags: options of the extension that have been used + * @invert: whether option was used with ! + * @val: parsed result + */ +struct xt_option_call { + const char *arg, *ext_name; + const struct xt_option_entry *entry; + void *data; + unsigned int xflags; + bool invert; + union { + uint32_t u32; + } val; +}; + +/** + * @ext_name: name of extension currently being processed + * @data: per-extension data block + * @xflags: options of the extension that have been used + */ +struct xt_fcheck_call { + const char *ext_name; + void *data; + unsigned int xflags; +}; + /* Include file for additions: new matches and targets. */ struct xtables_match { @@ -86,6 +171,11 @@ struct xtables_match /* Pointer to list of extra command-line options */ const struct option *extra_opts; + /* New parser */ + void (*x6_parse)(struct xt_option_call *); + void (*x6_fcheck)(struct xt_fcheck_call *); + const struct xt_option_entry *x6_options; + /* Ignore these men behind the curtain: */ unsigned int option_offset; struct xt_entry_match *m; @@ -145,6 +235,11 @@ struct xtables_target /* Pointer to list of extra command-line options */ const struct option *extra_opts; + /* New parser */ + void (*x6_parse)(struct xt_option_call *); + void (*x6_fcheck)(struct xt_fcheck_call *); + const struct xt_option_entry *x6_options; + /* Ignore these men behind the curtain: */ unsigned int option_offset; struct xt_entry_target *t; @@ -293,6 +388,22 @@ extern void xtables_save_string(const char *value); extern const struct xtables_pprot xtables_chain_protos[]; extern u_int16_t xtables_parse_protocol(const char *s); +/* xtoptions.c */ +extern void xtables_option_metavalidate(const char *, + const struct xt_option_entry *); +extern struct option *xtables_options_xfrm(struct option *, struct option *, + const struct xt_option_entry *, + unsigned int *); +extern void xtables_option_parse(struct xt_option_call *); +extern void xtables_option_tpcall(unsigned int, char **, bool, + struct xtables_target *, void *); +extern void xtables_option_mpcall(unsigned int, char **, bool, + struct xtables_match *, void *); +extern void xtables_option_tfcall(struct xtables_target *); +extern void xtables_option_mfcall(struct xtables_match *); +extern void xtables_options_fcheck(const char *, unsigned int, + const struct xt_option_entry *); + #ifdef XTABLES_INTERNAL /* Shipped modules rely on this... */ |