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freebsd-dev/sys/netpfil/ipfw/ip_fw_table.h
Andrey V. Elsukov f81431cca1 Add ipfw_check_object_name_generic() function to do basic checks for an 
object name correctness. Each type of object can do more strict checking
in own implementation. Do such checks for tables in check_table_name().

Reviewed by:	melifaro
Obtained from:	Yandex LLC
Sponsored by:	Yandex LLC
2015-11-03 10:29:46 +00:00

235 lines
8.9 KiB
C
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/*-
* Copyright (c) 2002-2009 Luigi Rizzo, Universita` di Pisa
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _IPFW2_TABLE_H
#define _IPFW2_TABLE_H
/*
* Internal constants and data structures used by ipfw tables
* not meant to be exported outside the kernel.
*/
#ifdef _KERNEL
struct table_algo;
struct tables_config {
struct namedobj_instance *namehash;
struct namedobj_instance *valhash;
uint32_t val_size;
uint32_t algo_count;
struct table_algo *algo[256];
struct table_algo *def_algo[IPFW_TABLE_MAXTYPE + 1];
TAILQ_HEAD(op_state_l,op_state) state_list;
};
#define CHAIN_TO_TCFG(chain) ((struct tables_config *)(chain)->tblcfg)
struct table_info {
table_lookup_t *lookup; /* Lookup function */
void *state; /* Lookup radix/other structure */
void *xstate; /* eXtended state */
u_long data; /* Hints for given func */
};
struct table_value;
struct tentry_info {
void *paddr;
struct table_value *pvalue;
void *ptv; /* Temporary field to hold obj */
uint8_t masklen; /* mask length */
uint8_t subtype;
uint16_t flags; /* record flags */
uint32_t value; /* value index */
};
#define TEI_FLAGS_UPDATE 0x0001 /* Add or update rec if exists */
#define TEI_FLAGS_UPDATED 0x0002 /* Entry has been updated */
#define TEI_FLAGS_COMPAT 0x0004 /* Called from old ABI */
#define TEI_FLAGS_DONTADD 0x0008 /* Do not create new rec */
#define TEI_FLAGS_ADDED 0x0010 /* Entry was added */
#define TEI_FLAGS_DELETED 0x0020 /* Entry was deleted */
#define TEI_FLAGS_LIMIT 0x0040 /* Limit was hit */
#define TEI_FLAGS_ERROR 0x0080 /* Unknown request error */
#define TEI_FLAGS_NOTFOUND 0x0100 /* Entry was not found */
#define TEI_FLAGS_EXISTS 0x0200 /* Entry already exists */
typedef int (ta_init)(struct ip_fw_chain *ch, void **ta_state,
struct table_info *ti, char *data, uint8_t tflags);
typedef void (ta_destroy)(void *ta_state, struct table_info *ti);
typedef int (ta_prepare_add)(struct ip_fw_chain *ch, struct tentry_info *tei,
void *ta_buf);
typedef int (ta_prepare_del)(struct ip_fw_chain *ch, struct tentry_info *tei,
void *ta_buf);
typedef int (ta_add)(void *ta_state, struct table_info *ti,
struct tentry_info *tei, void *ta_buf, uint32_t *pnum);
typedef int (ta_del)(void *ta_state, struct table_info *ti,
struct tentry_info *tei, void *ta_buf, uint32_t *pnum);
typedef void (ta_flush_entry)(struct ip_fw_chain *ch, struct tentry_info *tei,
void *ta_buf);
typedef int (ta_need_modify)(void *ta_state, struct table_info *ti,
uint32_t count, uint64_t *pflags);
typedef int (ta_prepare_mod)(void *ta_buf, uint64_t *pflags);
typedef int (ta_fill_mod)(void *ta_state, struct table_info *ti,
void *ta_buf, uint64_t *pflags);
typedef void (ta_modify)(void *ta_state, struct table_info *ti,
void *ta_buf, uint64_t pflags);
typedef void (ta_flush_mod)(void *ta_buf);
typedef void (ta_change_ti)(void *ta_state, struct table_info *ti);
typedef void (ta_print_config)(void *ta_state, struct table_info *ti, char *buf,
size_t bufsize);
typedef int ta_foreach_f(void *node, void *arg);
typedef void ta_foreach(void *ta_state, struct table_info *ti, ta_foreach_f *f,
void *arg);
typedef int ta_dump_tentry(void *ta_state, struct table_info *ti, void *e,
ipfw_obj_tentry *tent);
typedef int ta_find_tentry(void *ta_state, struct table_info *ti,
ipfw_obj_tentry *tent);
typedef void ta_dump_tinfo(void *ta_state, struct table_info *ti,
ipfw_ta_tinfo *tinfo);
typedef uint32_t ta_get_count(void *ta_state, struct table_info *ti);
struct table_algo {
char name[16];
uint32_t idx;
uint32_t type;
uint32_t refcnt;
uint32_t flags;
uint32_t vlimit;
size_t ta_buf_size;
ta_init *init;
ta_destroy *destroy;
ta_prepare_add *prepare_add;
ta_prepare_del *prepare_del;
ta_add *add;
ta_del *del;
ta_flush_entry *flush_entry;
ta_find_tentry *find_tentry;
ta_need_modify *need_modify;
ta_prepare_mod *prepare_mod;
ta_fill_mod *fill_mod;
ta_modify *modify;
ta_flush_mod *flush_mod;
ta_change_ti *change_ti;
ta_foreach *foreach;
ta_dump_tentry *dump_tentry;
ta_print_config *print_config;
ta_dump_tinfo *dump_tinfo;
ta_get_count *get_count;
};
#define TA_FLAG_DEFAULT 0x01 /* Algo is default for given type */
#define TA_FLAG_READONLY 0x02 /* Algo does not support modifications*/
#define TA_FLAG_EXTCOUNTER 0x04 /* Algo has external counter available*/
int ipfw_add_table_algo(struct ip_fw_chain *ch, struct table_algo *ta,
size_t size, int *idx);
void ipfw_del_table_algo(struct ip_fw_chain *ch, int idx);
void ipfw_table_algo_init(struct ip_fw_chain *chain);
void ipfw_table_algo_destroy(struct ip_fw_chain *chain);
MALLOC_DECLARE(M_IPFW_TBL);
/* Exported to support legacy opcodes */
int add_table_entry(struct ip_fw_chain *ch, struct tid_info *ti,
struct tentry_info *tei, uint8_t flags, uint32_t count);
int del_table_entry(struct ip_fw_chain *ch, struct tid_info *ti,
struct tentry_info *tei, uint8_t flags, uint32_t count);
int flush_table(struct ip_fw_chain *ch, struct tid_info *ti);
void ipfw_import_table_value_legacy(uint32_t value, struct table_value *v);
uint32_t ipfw_export_table_value_legacy(struct table_value *v);
int ipfw_get_table_size(struct ip_fw_chain *ch, ip_fw3_opheader *op3,
struct sockopt_data *sd);
/* ipfw_table_value.c functions */
struct table_config;
struct tableop_state;
void ipfw_table_value_init(struct ip_fw_chain *ch, int first);
void ipfw_table_value_destroy(struct ip_fw_chain *ch, int last);
int ipfw_link_table_values(struct ip_fw_chain *ch, struct tableop_state *ts);
void ipfw_garbage_table_values(struct ip_fw_chain *ch, struct table_config *tc,
struct tentry_info *tei, uint32_t count, int rollback);
void ipfw_import_table_value_v1(ipfw_table_value *iv);
void ipfw_export_table_value_v1(struct table_value *v, ipfw_table_value *iv);
void ipfw_unref_table_values(struct ip_fw_chain *ch, struct table_config *tc,
struct table_algo *ta, void *astate, struct table_info *ti);
void rollback_table_values(struct tableop_state *ts);
int ipfw_rewrite_table_uidx(struct ip_fw_chain *chain,
struct rule_check_info *ci);
int ipfw_mark_table_kidx(struct ip_fw_chain *chain, struct ip_fw *rule,
uint32_t *bmask);
int ipfw_export_table_ntlv(struct ip_fw_chain *ch, uint16_t kidx,
struct sockopt_data *sd);
void ipfw_unref_rule_tables(struct ip_fw_chain *chain, struct ip_fw *rule);
struct namedobj_instance *ipfw_get_table_objhash(struct ip_fw_chain *ch);
/* utility functions */
int ipfw_move_tables_sets(struct ip_fw_chain *ch, ipfw_range_tlv *rt,
uint32_t new_set);
void ipfw_swap_tables_sets(struct ip_fw_chain *ch, uint32_t old_set,
uint32_t new_set, int mv);
int ipfw_foreach_table_tentry(struct ip_fw_chain *ch, uint16_t kidx,
ta_foreach_f f, void *arg);
/* internal functions */
void tc_ref(struct table_config *tc);
void tc_unref(struct table_config *tc);
struct op_state;
typedef void (op_rollback_f)(void *object, struct op_state *state);
struct op_state {
TAILQ_ENTRY(op_state) next; /* chain link */
op_rollback_f *func;
};
struct tableop_state {
struct op_state opstate;
struct ip_fw_chain *ch;
struct table_config *tc;
struct table_algo *ta;
struct tentry_info *tei;
uint32_t count;
uint32_t vmask;
int vshared;
int modified;
};
void add_toperation_state(struct ip_fw_chain *ch, struct tableop_state *ts);
void del_toperation_state(struct ip_fw_chain *ch, struct tableop_state *ts);
void rollback_toperation_state(struct ip_fw_chain *ch, void *object);
/* Legacy interfaces */
int ipfw_count_table(struct ip_fw_chain *ch, struct tid_info *ti,
uint32_t *cnt);
int ipfw_count_xtable(struct ip_fw_chain *ch, struct tid_info *ti,
uint32_t *cnt);
int ipfw_dump_table_legacy(struct ip_fw_chain *ch, struct tid_info *ti,
ipfw_table *tbl);
#endif /* _KERNEL */
#endif /* _IPFW2_TABLE_H */
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