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