From df60a301bf24c3b3e37188d9da155b97fd6dc076 Mon Sep 17 00:00:00 2001 From: Jan Engelhardt Date: Fri, 31 Aug 2012 03:59:07 +0200 Subject: build: separate AC variable replacements from xtables.h It was/is a bit annoying that modifying xtables.h.in causes configure to rerun. Split the @foo@ things into a separate file to bypass this. Signed-off-by: Jan Engelhardt --- include/Makefile.am | 2 +- include/xtables-version.h.in | 2 + include/xtables.h | 526 ++++++++++++++++++++++++++++++++++++++++++ include/xtables.h.in | 527 ------------------------------------------- 4 files changed, 529 insertions(+), 528 deletions(-) create mode 100644 include/xtables-version.h.in create mode 100644 include/xtables.h delete mode 100644 include/xtables.h.in (limited to 'include') diff --git a/include/Makefile.am b/include/Makefile.am index 6f7da598..e6951209 100644 --- a/include/Makefile.am +++ b/include/Makefile.am @@ -1,7 +1,7 @@ # -*- Makefile -*- include_HEADERS = -nobase_include_HEADERS = xtables.h +nobase_include_HEADERS = xtables.h xtables-version.h if ENABLE_LIBIPQ include_HEADERS += libipq/libipq.h diff --git a/include/xtables-version.h.in b/include/xtables-version.h.in new file mode 100644 index 00000000..cb13827c --- /dev/null +++ b/include/xtables-version.h.in @@ -0,0 +1,2 @@ +#define XTABLES_VERSION "libxtables.so.@libxtables_vmajor@" +#define XTABLES_VERSION_CODE @libxtables_vmajor@ diff --git a/include/xtables.h b/include/xtables.h new file mode 100644 index 00000000..3b15e67e --- /dev/null +++ b/include/xtables.h @@ -0,0 +1,526 @@ +#ifndef _XTABLES_H +#define _XTABLES_H + +/* + * Changing any structs/functions may incur a needed change + * in libxtables_vcurrent/vage too. + */ + +#include /* PF_* */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifndef IPPROTO_SCTP +#define IPPROTO_SCTP 132 +#endif +#ifndef IPPROTO_DCCP +#define IPPROTO_DCCP 33 +#endif +#ifndef IPPROTO_MH +# define IPPROTO_MH 135 +#endif +#ifndef IPPROTO_UDPLITE +#define IPPROTO_UDPLITE 136 +#endif + +#include + +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} + +/** + * Select the format the input has to conform to, as well as the target type + * (area pointed to with XTOPT_POINTER). Note that the storing is not always + * uniform. @cb->val will be populated with as much as there is space, i.e. + * exactly 2 items for ranges, but the target area can receive more values + * (e.g. in case of ranges), or less values (e.g. %XTTYPE_HOSTMASK). + * + * %XTTYPE_NONE: option takes no argument + * %XTTYPE_UINT*: standard integer + * %XTTYPE_UINT*RC: colon-separated range of standard integers + * %XTTYPE_DOUBLE: double-precision floating point number + * %XTTYPE_STRING: arbitrary string + * %XTTYPE_TOSMASK: 8-bit TOS value with optional mask + * %XTTYPE_MARKMASK32: 32-bit mark with optional mask + * %XTTYPE_SYSLOGLEVEL: syslog level by name or number + * %XTTYPE_HOST: one host or address (ptr: union nf_inet_addr) + * %XTTYPE_HOSTMASK: one host or address, with an optional prefix length + * (ptr: union nf_inet_addr; only host portion is stored) + * %XTTYPE_PROTOCOL: protocol number/name from /etc/protocols (ptr: uint8_t) + * %XTTYPE_PORT: 16-bit port name or number (supports %XTOPT_NBO) + * %XTTYPE_PORTRC: colon-separated port range (names acceptable), + * (supports %XTOPT_NBO) + * %XTTYPE_PLEN: prefix length + * %XTTYPE_PLENMASK: prefix length (ptr: union nf_inet_addr) + * %XTTYPE_ETHERMAC: Ethernet MAC address in hex form + */ +enum xt_option_type { + XTTYPE_NONE, + XTTYPE_UINT8, + XTTYPE_UINT16, + XTTYPE_UINT32, + XTTYPE_UINT64, + XTTYPE_UINT8RC, + XTTYPE_UINT16RC, + XTTYPE_UINT32RC, + XTTYPE_UINT64RC, + XTTYPE_DOUBLE, + XTTYPE_STRING, + XTTYPE_TOSMASK, + XTTYPE_MARKMASK32, + XTTYPE_SYSLOGLEVEL, + XTTYPE_HOST, + XTTYPE_HOSTMASK, + XTTYPE_PROTOCOL, + XTTYPE_PORT, + XTTYPE_PORTRC, + XTTYPE_PLEN, + XTTYPE_PLENMASK, + XTTYPE_ETHERMAC, +}; + +/** + * %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 + * %XTOPT_NBO: store value in network-byte order + * (only certain XTTYPEs recognize this) + */ +enum xt_option_flags { + XTOPT_INVERT = 1 << 0, + XTOPT_MAND = 1 << 1, + XTOPT_MULTI = 1 << 2, + XTOPT_PUT = 1 << 3, + XTOPT_NBO = 1 << 4, +}; + +/** + * @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 kernel data block + * @xflags: options of the extension that have been used + * @invert: whether option was used with ! + * @nvals: number of results in uXX_multi + * @val: parsed result + * @udata: per-extension private scratch area + * (cf. xtables_{match,target}->udata_size) + */ +struct xt_option_call { + const char *arg, *ext_name; + const struct xt_option_entry *entry; + void *data; + unsigned int xflags; + bool invert; + uint8_t nvals; + union { + uint8_t u8, u8_range[2], syslog_level, protocol; + uint16_t u16, u16_range[2], port, port_range[2]; + uint32_t u32, u32_range[2]; + uint64_t u64, u64_range[2]; + double dbl; + struct { + union nf_inet_addr haddr, hmask; + uint8_t hlen; + }; + struct { + uint8_t tos_value, tos_mask; + }; + struct { + uint32_t mark, mask; + }; + uint8_t ethermac[6]; + } val; + /* Wished for a world where the ones below were gone: */ + union { + struct xt_entry_match **match; + struct xt_entry_target **target; + }; + void *xt_entry; + void *udata; +}; + +/** + * @ext_name: name of extension currently being processed + * @data: per-extension (kernel) data block + * @udata: per-extension private scratch area + * (cf. xtables_{match,target}->udata_size) + * @xflags: options of the extension that have been used + */ +struct xt_fcheck_call { + const char *ext_name; + void *data, *udata; + unsigned int xflags; +}; + +/** + * A "linear"/linked-list based name<->id map, for files similar to + * /etc/iproute2/. + */ +struct xtables_lmap { + char *name; + int id; + struct xtables_lmap *next; +}; + +/* Include file for additions: new matches and targets. */ +struct xtables_match +{ + /* + * ABI/API version this module requires. Must be first member, + * as the rest of this struct may be subject to ABI changes. + */ + const char *version; + + struct xtables_match *next; + + const char *name; + + /* Revision of match (0 by default). */ + u_int8_t revision; + + u_int16_t family; + + /* 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 xt_entry_match *m); + + /* Function which parses command options; returns true if it + ate an option */ + /* entry is struct ipt_entry for example */ + int (*parse)(int c, char **argv, int invert, unsigned int *flags, + const void *entry, + struct xt_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 */ + /* ip is struct ipt_ip * for example */ + void (*print)(const void *ip, + const struct xt_entry_match *match, int numeric); + + /* Saves the match info in parsable form to stdout. */ + /* ip is struct ipt_ip * for example */ + void (*save)(const void *ip, const struct xt_entry_match *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; + + /* Size of per-extension instance extra "global" scratch space */ + size_t udata_size; + + /* Ignore these men behind the curtain: */ + void *udata; + unsigned int option_offset; + struct xt_entry_match *m; + unsigned int mflags; + unsigned int loaded; /* simulate loading so options are merged properly */ +}; + +struct xtables_target +{ + /* + * ABI/API version this module requires. Must be first member, + * as the rest of this struct may be subject to ABI changes. + */ + const char *version; + + struct xtables_target *next; + + + const char *name; + + /* Revision of target (0 by default). */ + u_int8_t revision; + + u_int16_t family; + + + /* 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 xt_entry_target *t); + + /* Function which parses command options; returns true if it + ate an option */ + /* entry is struct ipt_entry for example */ + int (*parse)(int c, char **argv, int invert, unsigned int *flags, + const void *entry, + struct xt_entry_target **targetinfo); + + /* 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 void *ip, + const struct xt_entry_target *target, int numeric); + + /* Saves the targinfo in parsable form to stdout. */ + void (*save)(const void *ip, + const struct xt_entry_target *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; + + size_t udata_size; + + /* Ignore these men behind the curtain: */ + void *udata; + unsigned int option_offset; + struct xt_entry_target *t; + unsigned int tflags; + unsigned int used; + unsigned int loaded; /* simulate loading so options are merged properly */ +}; + +struct xtables_rule_match { + struct xtables_rule_match *next; + struct xtables_match *match; + /* Multiple matches of the same type: the ones before + the current one are completed from parsing point of view */ + bool completed; +}; + +/** + * struct xtables_pprot - + * + * A few hardcoded protocols for 'all' and in case the user has no + * /etc/protocols. + */ +struct xtables_pprot { + const char *name; + u_int8_t num; +}; + +enum xtables_tryload { + XTF_DONT_LOAD, + XTF_DURING_LOAD, + XTF_TRY_LOAD, + XTF_LOAD_MUST_SUCCEED, +}; + +enum xtables_exittype { + OTHER_PROBLEM = 1, + PARAMETER_PROBLEM, + VERSION_PROBLEM, + RESOURCE_PROBLEM, + XTF_ONLY_ONCE, + XTF_NO_INVERT, + XTF_BAD_VALUE, + XTF_ONE_ACTION, +}; + +struct xtables_globals +{ + unsigned int option_offset; + const char *program_name, *program_version; + struct option *orig_opts; + struct option *opts; + void (*exit_err)(enum xtables_exittype status, const char *msg, ...) __attribute__((noreturn, format(printf,2,3))); +}; + +#define XT_GETOPT_TABLEEND {.name = NULL, .has_arg = false} + +#ifdef __cplusplus +extern "C" { +#endif + +extern const char *xtables_modprobe_program; +extern struct xtables_match *xtables_matches; +extern struct xtables_target *xtables_targets; + +extern void xtables_init(void); +extern void xtables_set_nfproto(uint8_t); +extern void *xtables_calloc(size_t, size_t); +extern void *xtables_malloc(size_t); +extern void *xtables_realloc(void *, size_t); + +extern int xtables_insmod(const char *, const char *, bool); +extern int xtables_load_ko(const char *, bool); +extern int xtables_set_params(struct xtables_globals *xtp); +extern void xtables_free_opts(int reset_offset); +extern struct option *xtables_merge_options(struct option *origopts, + struct option *oldopts, const struct option *newopts, + unsigned int *option_offset); + +extern int xtables_init_all(struct xtables_globals *xtp, uint8_t nfproto); +extern struct xtables_match *xtables_find_match(const char *name, + enum xtables_tryload, struct xtables_rule_match **match); +extern struct xtables_target *xtables_find_target(const char *name, + enum xtables_tryload); + +/* Your shared library should call one of these. */ +extern void xtables_register_match(struct xtables_match *me); +extern void xtables_register_matches(struct xtables_match *, unsigned int); +extern void xtables_register_target(struct xtables_target *me); +extern void xtables_register_targets(struct xtables_target *, unsigned int); + +extern bool xtables_strtoul(const char *, char **, uintmax_t *, + uintmax_t, uintmax_t); +extern bool xtables_strtoui(const char *, char **, unsigned int *, + unsigned int, unsigned int); +extern int xtables_service_to_port(const char *name, const char *proto); +extern u_int16_t xtables_parse_port(const char *port, const char *proto); +extern void +xtables_parse_interface(const char *arg, char *vianame, unsigned char *mask); + +/* this is a special 64bit data type that is 8-byte aligned */ +#define aligned_u64 u_int64_t __attribute__((aligned(8))) + +extern struct xtables_globals *xt_params; +#define xtables_error (xt_params->exit_err) + +extern void xtables_param_act(unsigned int, const char *, ...); + +extern const char *xtables_ipaddr_to_numeric(const struct in_addr *); +extern const char *xtables_ipaddr_to_anyname(const struct in_addr *); +extern const char *xtables_ipmask_to_numeric(const struct in_addr *); +extern struct in_addr *xtables_numeric_to_ipaddr(const char *); +extern struct in_addr *xtables_numeric_to_ipmask(const char *); +extern int xtables_ipmask_to_cidr(const struct in_addr *); +extern void xtables_ipparse_any(const char *, struct in_addr **, + struct in_addr *, unsigned int *); +extern void xtables_ipparse_multiple(const char *, struct in_addr **, + struct in_addr **, unsigned int *); + +extern struct in6_addr *xtables_numeric_to_ip6addr(const char *); +extern const char *xtables_ip6addr_to_numeric(const struct in6_addr *); +extern const char *xtables_ip6addr_to_anyname(const struct in6_addr *); +extern const char *xtables_ip6mask_to_numeric(const struct in6_addr *); +extern int xtables_ip6mask_to_cidr(const struct in6_addr *); +extern void xtables_ip6parse_any(const char *, struct in6_addr **, + struct in6_addr *, unsigned int *); +extern void xtables_ip6parse_multiple(const char *, struct in6_addr **, + struct in6_addr **, unsigned int *); + +/** + * Print the specified value to standard output, quoting dangerous + * characters if required. + */ +extern void xtables_save_string(const char *value); + +#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS) +# ifdef _INIT +# undef _init +# define _init _INIT +# endif + extern void init_extensions(void); + extern void init_extensions4(void); + extern void init_extensions6(void); +#else +# define _init __attribute__((constructor)) _INIT +#endif + +extern const struct xtables_pprot xtables_chain_protos[]; +extern u_int16_t xtables_parse_protocol(const char *s); + +/* kernel revision handling */ +extern int kernel_version; +extern void get_kernel_version(void); +#define LINUX_VERSION(x,y,z) (0x10000*(x) + 0x100*(y) + z) +#define LINUX_VERSION_MAJOR(x) (((x)>>16) & 0xFF) +#define LINUX_VERSION_MINOR(x) (((x)>> 8) & 0xFF) +#define LINUX_VERSION_PATCH(x) ( (x) & 0xFF) + +/* 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 *); + +extern struct xtables_lmap *xtables_lmap_init(const char *); +extern void xtables_lmap_free(struct xtables_lmap *); +extern int xtables_lmap_name2id(const struct xtables_lmap *, const char *); +extern const char *xtables_lmap_id2name(const struct xtables_lmap *, int); + +#ifdef XTABLES_INTERNAL + +/* Shipped modules rely on this... */ + +# ifndef ARRAY_SIZE +# define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x))) +# endif + +extern void _init(void); + +#endif + +#ifdef __cplusplus +} /* extern "C" */ +#endif + +#endif /* _XTABLES_H */ diff --git a/include/xtables.h.in b/include/xtables.h.in deleted file mode 100644 index db69c03b..00000000 --- a/include/xtables.h.in +++ /dev/null @@ -1,527 +0,0 @@ -#ifndef _XTABLES_H -#define _XTABLES_H - -/* - * Changing any structs/functions may incur a needed change - * in libxtables_vcurrent/vage too. - */ - -#include /* PF_* */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#ifndef IPPROTO_SCTP -#define IPPROTO_SCTP 132 -#endif -#ifndef IPPROTO_DCCP -#define IPPROTO_DCCP 33 -#endif -#ifndef IPPROTO_MH -# define IPPROTO_MH 135 -#endif -#ifndef IPPROTO_UDPLITE -#define IPPROTO_UDPLITE 136 -#endif - -#define XTABLES_VERSION "libxtables.so.@libxtables_vmajor@" -#define XTABLES_VERSION_CODE @libxtables_vmajor@ - -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} - -/** - * Select the format the input has to conform to, as well as the target type - * (area pointed to with XTOPT_POINTER). Note that the storing is not always - * uniform. @cb->val will be populated with as much as there is space, i.e. - * exactly 2 items for ranges, but the target area can receive more values - * (e.g. in case of ranges), or less values (e.g. %XTTYPE_HOSTMASK). - * - * %XTTYPE_NONE: option takes no argument - * %XTTYPE_UINT*: standard integer - * %XTTYPE_UINT*RC: colon-separated range of standard integers - * %XTTYPE_DOUBLE: double-precision floating point number - * %XTTYPE_STRING: arbitrary string - * %XTTYPE_TOSMASK: 8-bit TOS value with optional mask - * %XTTYPE_MARKMASK32: 32-bit mark with optional mask - * %XTTYPE_SYSLOGLEVEL: syslog level by name or number - * %XTTYPE_HOST: one host or address (ptr: union nf_inet_addr) - * %XTTYPE_HOSTMASK: one host or address, with an optional prefix length - * (ptr: union nf_inet_addr; only host portion is stored) - * %XTTYPE_PROTOCOL: protocol number/name from /etc/protocols (ptr: uint8_t) - * %XTTYPE_PORT: 16-bit port name or number (supports %XTOPT_NBO) - * %XTTYPE_PORTRC: colon-separated port range (names acceptable), - * (supports %XTOPT_NBO) - * %XTTYPE_PLEN: prefix length - * %XTTYPE_PLENMASK: prefix length (ptr: union nf_inet_addr) - * %XTTYPE_ETHERMAC: Ethernet MAC address in hex form - */ -enum xt_option_type { - XTTYPE_NONE, - XTTYPE_UINT8, - XTTYPE_UINT16, - XTTYPE_UINT32, - XTTYPE_UINT64, - XTTYPE_UINT8RC, - XTTYPE_UINT16RC, - XTTYPE_UINT32RC, - XTTYPE_UINT64RC, - XTTYPE_DOUBLE, - XTTYPE_STRING, - XTTYPE_TOSMASK, - XTTYPE_MARKMASK32, - XTTYPE_SYSLOGLEVEL, - XTTYPE_HOST, - XTTYPE_HOSTMASK, - XTTYPE_PROTOCOL, - XTTYPE_PORT, - XTTYPE_PORTRC, - XTTYPE_PLEN, - XTTYPE_PLENMASK, - XTTYPE_ETHERMAC, -}; - -/** - * %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 - * %XTOPT_NBO: store value in network-byte order - * (only certain XTTYPEs recognize this) - */ -enum xt_option_flags { - XTOPT_INVERT = 1 << 0, - XTOPT_MAND = 1 << 1, - XTOPT_MULTI = 1 << 2, - XTOPT_PUT = 1 << 3, - XTOPT_NBO = 1 << 4, -}; - -/** - * @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 kernel data block - * @xflags: options of the extension that have been used - * @invert: whether option was used with ! - * @nvals: number of results in uXX_multi - * @val: parsed result - * @udata: per-extension private scratch area - * (cf. xtables_{match,target}->udata_size) - */ -struct xt_option_call { - const char *arg, *ext_name; - const struct xt_option_entry *entry; - void *data; - unsigned int xflags; - bool invert; - uint8_t nvals; - union { - uint8_t u8, u8_range[2], syslog_level, protocol; - uint16_t u16, u16_range[2], port, port_range[2]; - uint32_t u32, u32_range[2]; - uint64_t u64, u64_range[2]; - double dbl; - struct { - union nf_inet_addr haddr, hmask; - uint8_t hlen; - }; - struct { - uint8_t tos_value, tos_mask; - }; - struct { - uint32_t mark, mask; - }; - uint8_t ethermac[6]; - } val; - /* Wished for a world where the ones below were gone: */ - union { - struct xt_entry_match **match; - struct xt_entry_target **target; - }; - void *xt_entry; - void *udata; -}; - -/** - * @ext_name: name of extension currently being processed - * @data: per-extension (kernel) data block - * @udata: per-extension private scratch area - * (cf. xtables_{match,target}->udata_size) - * @xflags: options of the extension that have been used - */ -struct xt_fcheck_call { - const char *ext_name; - void *data, *udata; - unsigned int xflags; -}; - -/** - * A "linear"/linked-list based name<->id map, for files similar to - * /etc/iproute2/. - */ -struct xtables_lmap { - char *name; - int id; - struct xtables_lmap *next; -}; - -/* Include file for additions: new matches and targets. */ -struct xtables_match -{ - /* - * ABI/API version this module requires. Must be first member, - * as the rest of this struct may be subject to ABI changes. - */ - const char *version; - - struct xtables_match *next; - - const char *name; - - /* Revision of match (0 by default). */ - u_int8_t revision; - - u_int16_t family; - - /* 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 xt_entry_match *m); - - /* Function which parses command options; returns true if it - ate an option */ - /* entry is struct ipt_entry for example */ - int (*parse)(int c, char **argv, int invert, unsigned int *flags, - const void *entry, - struct xt_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 */ - /* ip is struct ipt_ip * for example */ - void (*print)(const void *ip, - const struct xt_entry_match *match, int numeric); - - /* Saves the match info in parsable form to stdout. */ - /* ip is struct ipt_ip * for example */ - void (*save)(const void *ip, const struct xt_entry_match *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; - - /* Size of per-extension instance extra "global" scratch space */ - size_t udata_size; - - /* Ignore these men behind the curtain: */ - void *udata; - unsigned int option_offset; - struct xt_entry_match *m; - unsigned int mflags; - unsigned int loaded; /* simulate loading so options are merged properly */ -}; - -struct xtables_target -{ - /* - * ABI/API version this module requires. Must be first member, - * as the rest of this struct may be subject to ABI changes. - */ - const char *version; - - struct xtables_target *next; - - - const char *name; - - /* Revision of target (0 by default). */ - u_int8_t revision; - - u_int16_t family; - - - /* 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 xt_entry_target *t); - - /* Function which parses command options; returns true if it - ate an option */ - /* entry is struct ipt_entry for example */ - int (*parse)(int c, char **argv, int invert, unsigned int *flags, - const void *entry, - struct xt_entry_target **targetinfo); - - /* 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 void *ip, - const struct xt_entry_target *target, int numeric); - - /* Saves the targinfo in parsable form to stdout. */ - void (*save)(const void *ip, - const struct xt_entry_target *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; - - size_t udata_size; - - /* Ignore these men behind the curtain: */ - void *udata; - unsigned int option_offset; - struct xt_entry_target *t; - unsigned int tflags; - unsigned int used; - unsigned int loaded; /* simulate loading so options are merged properly */ -}; - -struct xtables_rule_match { - struct xtables_rule_match *next; - struct xtables_match *match; - /* Multiple matches of the same type: the ones before - the current one are completed from parsing point of view */ - bool completed; -}; - -/** - * struct xtables_pprot - - * - * A few hardcoded protocols for 'all' and in case the user has no - * /etc/protocols. - */ -struct xtables_pprot { - const char *name; - u_int8_t num; -}; - -enum xtables_tryload { - XTF_DONT_LOAD, - XTF_DURING_LOAD, - XTF_TRY_LOAD, - XTF_LOAD_MUST_SUCCEED, -}; - -enum xtables_exittype { - OTHER_PROBLEM = 1, - PARAMETER_PROBLEM, - VERSION_PROBLEM, - RESOURCE_PROBLEM, - XTF_ONLY_ONCE, - XTF_NO_INVERT, - XTF_BAD_VALUE, - XTF_ONE_ACTION, -}; - -struct xtables_globals -{ - unsigned int option_offset; - const char *program_name, *program_version; - struct option *orig_opts; - struct option *opts; - void (*exit_err)(enum xtables_exittype status, const char *msg, ...) __attribute__((noreturn, format(printf,2,3))); -}; - -#define XT_GETOPT_TABLEEND {.name = NULL, .has_arg = false} - -#ifdef __cplusplus -extern "C" { -#endif - -extern const char *xtables_modprobe_program; -extern struct xtables_match *xtables_matches; -extern struct xtables_target *xtables_targets; - -extern void xtables_init(void); -extern void xtables_set_nfproto(uint8_t); -extern void *xtables_calloc(size_t, size_t); -extern void *xtables_malloc(size_t); -extern void *xtables_realloc(void *, size_t); - -extern int xtables_insmod(const char *, const char *, bool); -extern int xtables_load_ko(const char *, bool); -extern int xtables_set_params(struct xtables_globals *xtp); -extern void xtables_free_opts(int reset_offset); -extern struct option *xtables_merge_options(struct option *origopts, - struct option *oldopts, const struct option *newopts, - unsigned int *option_offset); - -extern int xtables_init_all(struct xtables_globals *xtp, uint8_t nfproto); -extern struct xtables_match *xtables_find_match(const char *name, - enum xtables_tryload, struct xtables_rule_match **match); -extern struct xtables_target *xtables_find_target(const char *name, - enum xtables_tryload); - -/* Your shared library should call one of these. */ -extern void xtables_register_match(struct xtables_match *me); -extern void xtables_register_matches(struct xtables_match *, unsigned int); -extern void xtables_register_target(struct xtables_target *me); -extern void xtables_register_targets(struct xtables_target *, unsigned int); - -extern bool xtables_strtoul(const char *, char **, uintmax_t *, - uintmax_t, uintmax_t); -extern bool xtables_strtoui(const char *, char **, unsigned int *, - unsigned int, unsigned int); -extern int xtables_service_to_port(const char *name, const char *proto); -extern u_int16_t xtables_parse_port(const char *port, const char *proto); -extern void -xtables_parse_interface(const char *arg, char *vianame, unsigned char *mask); - -/* this is a special 64bit data type that is 8-byte aligned */ -#define aligned_u64 u_int64_t __attribute__((aligned(8))) - -extern struct xtables_globals *xt_params; -#define xtables_error (xt_params->exit_err) - -extern void xtables_param_act(unsigned int, const char *, ...); - -extern const char *xtables_ipaddr_to_numeric(const struct in_addr *); -extern const char *xtables_ipaddr_to_anyname(const struct in_addr *); -extern const char *xtables_ipmask_to_numeric(const struct in_addr *); -extern struct in_addr *xtables_numeric_to_ipaddr(const char *); -extern struct in_addr *xtables_numeric_to_ipmask(const char *); -extern int xtables_ipmask_to_cidr(const struct in_addr *); -extern void xtables_ipparse_any(const char *, struct in_addr **, - struct in_addr *, unsigned int *); -extern void xtables_ipparse_multiple(const char *, struct in_addr **, - struct in_addr **, unsigned int *); - -extern struct in6_addr *xtables_numeric_to_ip6addr(const char *); -extern const char *xtables_ip6addr_to_numeric(const struct in6_addr *); -extern const char *xtables_ip6addr_to_anyname(const struct in6_addr *); -extern const char *xtables_ip6mask_to_numeric(const struct in6_addr *); -extern int xtables_ip6mask_to_cidr(const struct in6_addr *); -extern void xtables_ip6parse_any(const char *, struct in6_addr **, - struct in6_addr *, unsigned int *); -extern void xtables_ip6parse_multiple(const char *, struct in6_addr **, - struct in6_addr **, unsigned int *); - -/** - * Print the specified value to standard output, quoting dangerous - * characters if required. - */ -extern void xtables_save_string(const char *value); - -#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS) -# ifdef _INIT -# undef _init -# define _init _INIT -# endif - extern void init_extensions(void); - extern void init_extensions4(void); - extern void init_extensions6(void); -#else -# define _init __attribute__((constructor)) _INIT -#endif - -extern const struct xtables_pprot xtables_chain_protos[]; -extern u_int16_t xtables_parse_protocol(const char *s); - -/* kernel revision handling */ -extern int kernel_version; -extern void get_kernel_version(void); -#define LINUX_VERSION(x,y,z) (0x10000*(x) + 0x100*(y) + z) -#define LINUX_VERSION_MAJOR(x) (((x)>>16) & 0xFF) -#define LINUX_VERSION_MINOR(x) (((x)>> 8) & 0xFF) -#define LINUX_VERSION_PATCH(x) ( (x) & 0xFF) - -/* 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 *); - -extern struct xtables_lmap *xtables_lmap_init(const char *); -extern void xtables_lmap_free(struct xtables_lmap *); -extern int xtables_lmap_name2id(const struct xtables_lmap *, const char *); -extern const char *xtables_lmap_id2name(const struct xtables_lmap *, int); - -#ifdef XTABLES_INTERNAL - -/* Shipped modules rely on this... */ - -# ifndef ARRAY_SIZE -# define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x))) -# endif - -extern void _init(void); - -#endif - -#ifdef __cplusplus -} /* extern "C" */ -#endif - -#endif /* _XTABLES_H */ -- cgit v1.2.3