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* Add "flow:hash" algorithm Kernel changes: * Add O_IP_FLOW_LOOKUP opcode to support "flow" lookups * Add IPFW_TABLE_FLOW table type * Add "struct tflow_entry" as strage for 6-tuple flows * Add "flow:hash" algorithm. Basically it is auto-growing chained hash table. Additionally, we store mask of fields we need to compare in each instance/ * Increase ipfw_obj_tentry size by adding struct tflow_entry * Add per-algorithm stat (ifpw_ta_tinfo) to ipfw_xtable_info * Increase algoname length: 32 -> 64 (algo options passed there as string) * Assume every table type can be customized by flags, use u8 to store "tflags" field. * Simplify ipfw_find_table_entry() by providing @tentry directly to algo callback. * Fix bug in cidr:chash resize procedure. Userland changes: * add "flow table(NAME)" syntax to support n-tuple checking tables. * make fill_flags() separate function to ease working with _s_x arrays * change "table info" output to reflect longer "type" fields Syntax: ipfw table fl2 create type flow:[src-ip][,proto][,src-port][,dst-ip][dst-port] [algo flow:hash] Examples: 0:02 [2] zfscurr0# ipfw table fl2 create type flow:src-ip,proto,dst-port algo flow:hash 0:02 [2] zfscurr0# ipfw table fl2 info +++ table(fl2), set(0) +++ kindex: 0, type: flow:src-ip,proto,dst-port valtype: number, references: 0 algorithm: flow:hash items: 0, size: 280 0:02 [2] zfscurr0# ipfw table fl2 add 2a02:6b8::333,tcp,443 45000 0:02 [2] zfscurr0# ipfw table fl2 add 10.0.0.92,tcp,80 22000 0:02 [2] zfscurr0# ipfw table fl2 list +++ table(fl2), set(0) +++ 2a02:6b8::333,6,443 45000 10.0.0.92,6,80 22000 0:02 [2] zfscurr0# ipfw add 200 count tcp from me to 78.46.89.105 80 flow 'table(fl2)' 00200 count tcp from me to 78.46.89.105 dst-port 80 flow table(fl2) 0:03 [2] zfscurr0# ipfw show 00200 0 0 count tcp from me to 78.46.89.105 dst-port 80 flow table(fl2) 65535 617 59416 allow ip from any to any 0:03 [2] zfscurr0# telnet -s 10.0.0.92 78.46.89.105 80 Trying 78.46.89.105... .. 0:04 [2] zfscurr0# ipfw show 00200 5 272 count tcp from me to 78.46.89.105 dst-port 80 flow table(fl2) 65535 682 66733 allow ip from any to any
184 lines
6.9 KiB
C
184 lines
6.9 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: projects/ipfw/sys/netpfil/ipfw/ip_fw_private.h 267467 2014-06-14 10:58:39Z melifaro $
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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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* and not meant to be exported outside the kernel.
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*/
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#ifdef _KERNEL
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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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/* Internal structures for handling sockopt data */
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struct tid_info {
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uint32_t set; /* table set */
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uint16_t uidx; /* table index */
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uint8_t type; /* table type */
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uint8_t atype;
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void *tlvs; /* Pointer to first TLV */
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int tlen; /* Total TLV size block */
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};
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struct tentry_info {
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void *paddr;
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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 */
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};
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#define TEI_FLAGS_UPDATE 0x01 /* Update record if exists */
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#define TEI_FLAGS_UPDATED 0x02 /* Entry has been updated */
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#define TEI_FLAGS_COMPAT 0x04 /* Called from old ABI */
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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, uint64_t *pflags, 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, uint64_t *pflags, 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_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 int (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 int ta_dump_tinfo(void *ta_state, struct table_info *ti,
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ifpw_ta_tinfo *tinfo);
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struct table_algo {
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char name[16];
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int idx;
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int type;
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int refcnt;
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int spare;
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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_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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};
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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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extern struct table_algo cidr_radix, iface_idx, number_array, flow_hash;
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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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/* direct ipfw_ctl handlers */
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int ipfw_listsize_tables(struct ip_fw_chain *ch, struct sockopt_data *sd);
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int ipfw_list_tables(struct ip_fw_chain *ch, struct sockopt_data *sd);
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int ipfw_dump_table(struct ip_fw_chain *ch, ip_fw3_opheader *op3,
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struct sockopt_data *sd);
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int ipfw_describe_table(struct ip_fw_chain *ch, struct sockopt_data *sd);
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int ipfw_find_table_entry(struct ip_fw_chain *ch, ip_fw3_opheader *op3,
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struct sockopt_data *sd);
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int ipfw_create_table(struct ip_fw_chain *ch, ip_fw3_opheader *op3,
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struct sockopt_data *sd);
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int ipfw_manage_table_ent(struct ip_fw_chain *ch, ip_fw3_opheader *op3,
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struct sockopt_data *sd);
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int ipfw_flush_table(struct ip_fw_chain *ch, ip_fw3_opheader *op3,
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struct sockopt_data *sd);
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int ipfw_list_table_algo(struct ip_fw_chain *ch, struct sockopt_data *sd);
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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);
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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);
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int flush_table(struct ip_fw_chain *ch, struct tid_info *ti);
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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_rewrite_table_kidx(struct ip_fw_chain *chain,
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struct ip_fw_rule0 *rule);
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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_unbind_table_rule(struct ip_fw_chain *chain, struct ip_fw *rule);
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void ipfw_unbind_table_list(struct ip_fw_chain *chain, struct ip_fw *head);
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/* utility functions */
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void objheader_to_ti(struct _ipfw_obj_header *oh, struct tid_info *ti);
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int ipfw_check_table_name(char *name);
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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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