npf_impl.h revision 1.3.2.2
1 1.3.2.2 yamt /* $NetBSD: npf_impl.h,v 1.3.2.2 2010/10/09 03:32:37 yamt Exp $ */ 2 1.3.2.2 yamt 3 1.3.2.2 yamt /*- 4 1.3.2.2 yamt * Copyright (c) 2009-2010 The NetBSD Foundation, Inc. 5 1.3.2.2 yamt * All rights reserved. 6 1.3.2.2 yamt * 7 1.3.2.2 yamt * This material is based upon work partially supported by The 8 1.3.2.2 yamt * NetBSD Foundation under a contract with Mindaugas Rasiukevicius. 9 1.3.2.2 yamt * 10 1.3.2.2 yamt * Redistribution and use in source and binary forms, with or without 11 1.3.2.2 yamt * modification, are permitted provided that the following conditions 12 1.3.2.2 yamt * are met: 13 1.3.2.2 yamt * 1. Redistributions of source code must retain the above copyright 14 1.3.2.2 yamt * notice, this list of conditions and the following disclaimer. 15 1.3.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 16 1.3.2.2 yamt * notice, this list of conditions and the following disclaimer in the 17 1.3.2.2 yamt * documentation and/or other materials provided with the distribution. 18 1.3.2.2 yamt * 19 1.3.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.3.2.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.3.2.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.3.2.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.3.2.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.3.2.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.3.2.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.3.2.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.3.2.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.3.2.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.3.2.2 yamt * POSSIBILITY OF SUCH DAMAGE. 30 1.3.2.2 yamt */ 31 1.3.2.2 yamt 32 1.3.2.2 yamt /* 33 1.3.2.2 yamt * Private NPF structures and interfaces. 34 1.3.2.2 yamt * For internal use within NPF core only. 35 1.3.2.2 yamt */ 36 1.3.2.2 yamt 37 1.3.2.2 yamt #ifndef _NPF_IMPL_H_ 38 1.3.2.2 yamt #define _NPF_IMPL_H_ 39 1.3.2.2 yamt 40 1.3.2.2 yamt #include <sys/rbtree.h> 41 1.3.2.2 yamt #include <sys/hash.h> 42 1.3.2.2 yamt #include <sys/queue.h> 43 1.3.2.2 yamt #include <sys/types.h> 44 1.3.2.2 yamt #include <sys/rwlock.h> 45 1.3.2.2 yamt 46 1.3.2.2 yamt #include "npf.h" 47 1.3.2.2 yamt #include "npf_ncode.h" 48 1.3.2.2 yamt 49 1.3.2.2 yamt #ifdef _NPF_TESTING 50 1.3.2.2 yamt #include "testing.h" 51 1.3.2.2 yamt #endif 52 1.3.2.2 yamt 53 1.3.2.2 yamt /* 54 1.3.2.2 yamt * STRUCTURE DECLARATIONS. 55 1.3.2.2 yamt * 56 1.3.2.2 yamt * Note: ruleset interface declarations are public. 57 1.3.2.2 yamt */ 58 1.3.2.2 yamt 59 1.3.2.2 yamt struct npf_nat; 60 1.3.2.2 yamt struct npf_session; 61 1.3.2.2 yamt 62 1.3.2.2 yamt typedef struct npf_nat npf_nat_t; 63 1.3.2.2 yamt typedef struct npf_alg npf_alg_t; 64 1.3.2.2 yamt typedef struct npf_natpolicy npf_natpolicy_t; 65 1.3.2.2 yamt typedef struct npf_session npf_session_t; 66 1.3.2.2 yamt 67 1.3.2.2 yamt struct npf_tblent; 68 1.3.2.2 yamt struct npf_table; 69 1.3.2.2 yamt 70 1.3.2.2 yamt typedef struct npf_tblent npf_tblent_t; 71 1.3.2.2 yamt typedef struct npf_table npf_table_t; 72 1.3.2.2 yamt 73 1.3.2.2 yamt typedef npf_table_t * npf_tableset_t; 74 1.3.2.2 yamt 75 1.3.2.2 yamt /* 76 1.3.2.2 yamt * DEFINITIONS. 77 1.3.2.2 yamt */ 78 1.3.2.2 yamt 79 1.3.2.2 yamt typedef bool (*npf_algfunc_t)(npf_cache_t *, void *, void *); 80 1.3.2.2 yamt 81 1.3.2.2 yamt #define NPF_NCODE_LIMIT 1024 82 1.3.2.2 yamt #define NPF_TABLE_SLOTS 32 83 1.3.2.2 yamt 84 1.3.2.2 yamt /* 85 1.3.2.2 yamt * INTERFACES. 86 1.3.2.2 yamt */ 87 1.3.2.2 yamt 88 1.3.2.2 yamt /* NPF control. */ 89 1.3.2.2 yamt int npfctl_switch(void *); 90 1.3.2.2 yamt int npfctl_reload(u_long, void *); 91 1.3.2.2 yamt int npfctl_table(void *); 92 1.3.2.2 yamt 93 1.3.2.2 yamt /* Packet filter hooks. */ 94 1.3.2.2 yamt int npf_register_pfil(void); 95 1.3.2.2 yamt void npf_unregister_pfil(void); 96 1.3.2.2 yamt 97 1.3.2.2 yamt /* Protocol helpers. */ 98 1.3.2.2 yamt bool npf_ip4_proto(npf_cache_t *, nbuf_t *, void *); 99 1.3.2.2 yamt bool npf_fetch_ip4addrs(npf_cache_t *, nbuf_t *, void *); 100 1.3.2.2 yamt bool npf_fetch_ports(npf_cache_t *, nbuf_t *, void *, const int); 101 1.3.2.2 yamt bool npf_fetch_tcpfl(npf_cache_t *, nbuf_t *, void *); 102 1.3.2.2 yamt bool npf_fetch_icmp(npf_cache_t *, nbuf_t *, void *); 103 1.3.2.2 yamt bool npf_cache_all(npf_cache_t *, nbuf_t *); 104 1.3.2.2 yamt 105 1.3.2.2 yamt bool npf_rwrport(npf_cache_t *, nbuf_t *, void *, const int, 106 1.3.2.2 yamt in_port_t, in_addr_t); 107 1.3.2.2 yamt bool npf_rwrip(npf_cache_t *, nbuf_t *, void *, const int, in_addr_t); 108 1.3.2.2 yamt 109 1.3.2.2 yamt uint16_t npf_fixup16_cksum(uint16_t, uint16_t, uint16_t); 110 1.3.2.2 yamt uint16_t npf_fixup32_cksum(uint16_t, uint32_t, uint32_t); 111 1.3.2.2 yamt 112 1.3.2.2 yamt void npf_return_block(npf_cache_t *, nbuf_t *, const int); 113 1.3.2.2 yamt 114 1.3.2.2 yamt /* Complex instructions. */ 115 1.3.2.2 yamt int npf_match_ether(nbuf_t *, int, int, uint16_t, uint32_t *); 116 1.3.2.2 yamt int npf_match_ip4table(npf_cache_t *, nbuf_t *, void *, 117 1.3.2.2 yamt const int, const u_int); 118 1.3.2.2 yamt int npf_match_ip4mask(npf_cache_t *, nbuf_t *, void *, 119 1.3.2.2 yamt const int, in_addr_t, in_addr_t); 120 1.3.2.2 yamt int npf_match_tcp_ports(npf_cache_t *, nbuf_t *, void *, 121 1.3.2.2 yamt const int, const uint32_t); 122 1.3.2.2 yamt int npf_match_udp_ports(npf_cache_t *, nbuf_t *, void *, 123 1.3.2.2 yamt const int, const uint32_t); 124 1.3.2.2 yamt int npf_match_icmp4(npf_cache_t *, nbuf_t *, void *, const uint32_t); 125 1.3.2.2 yamt int npf_match_tcpfl(npf_cache_t *, nbuf_t *, void *, const uint32_t); 126 1.3.2.2 yamt 127 1.3.2.2 yamt /* Tableset interface. */ 128 1.3.2.2 yamt int npf_tableset_sysinit(void); 129 1.3.2.2 yamt void npf_tableset_sysfini(void); 130 1.3.2.2 yamt 131 1.3.2.2 yamt npf_tableset_t *npf_tableset_create(void); 132 1.3.2.2 yamt void npf_tableset_destroy(npf_tableset_t *); 133 1.3.2.2 yamt int npf_tableset_insert(npf_tableset_t *, npf_table_t *); 134 1.3.2.2 yamt npf_tableset_t *npf_tableset_reload(npf_tableset_t *); 135 1.3.2.2 yamt 136 1.3.2.2 yamt npf_table_t * npf_table_create(u_int, int, size_t); 137 1.3.2.2 yamt void npf_table_destroy(npf_table_t *); 138 1.3.2.2 yamt void npf_table_ref(npf_table_t *); 139 1.3.2.2 yamt void npf_table_unref(npf_table_t *); 140 1.3.2.2 yamt 141 1.3.2.2 yamt npf_table_t * npf_table_get(npf_tableset_t *, u_int); 142 1.3.2.2 yamt void npf_table_put(npf_table_t *); 143 1.3.2.2 yamt int npf_table_check(npf_tableset_t *, u_int, int); 144 1.3.2.2 yamt int npf_table_add_v4cidr(npf_tableset_t *, u_int, 145 1.3.2.2 yamt in_addr_t, in_addr_t); 146 1.3.2.2 yamt int npf_table_rem_v4cidr(npf_tableset_t *, u_int, 147 1.3.2.2 yamt in_addr_t, in_addr_t); 148 1.3.2.2 yamt int npf_table_match_v4addr(u_int, in_addr_t); 149 1.3.2.2 yamt 150 1.3.2.2 yamt /* Ruleset interface. */ 151 1.3.2.2 yamt int npf_ruleset_sysinit(void); 152 1.3.2.2 yamt void npf_ruleset_sysfini(void); 153 1.3.2.2 yamt 154 1.3.2.2 yamt npf_ruleset_t * npf_ruleset_create(void); 155 1.3.2.2 yamt void npf_ruleset_destroy(npf_ruleset_t *); 156 1.3.2.2 yamt void npf_ruleset_insert(npf_ruleset_t *, npf_rule_t *); 157 1.3.2.2 yamt void npf_ruleset_reload(npf_ruleset_t *, npf_tableset_t *); 158 1.3.2.2 yamt 159 1.3.2.2 yamt npf_rule_t * npf_ruleset_match(npf_ruleset_t *, npf_cache_t *, nbuf_t *, 160 1.3.2.2 yamt struct ifnet *, const int, const int); 161 1.3.2.2 yamt npf_rule_t * npf_ruleset_inspect(npf_cache_t *, nbuf_t *, 162 1.3.2.2 yamt struct ifnet *, const int, const int); 163 1.3.2.2 yamt int npf_rule_apply(const npf_cache_t *, npf_rule_t *, bool *, int *); 164 1.3.2.2 yamt npf_ruleset_t * npf_rule_subset(npf_rule_t *); 165 1.3.2.2 yamt 166 1.3.2.2 yamt npf_natpolicy_t *npf_rule_getnat(const npf_rule_t *); 167 1.3.2.2 yamt void npf_rule_setnat(npf_rule_t *, npf_natpolicy_t *); 168 1.3.2.2 yamt 169 1.3.2.2 yamt /* State handling interface. */ 170 1.3.2.2 yamt int npf_session_sysinit(void); 171 1.3.2.2 yamt void npf_session_sysfini(void); 172 1.3.2.2 yamt int npf_session_tracking(bool); 173 1.3.2.2 yamt 174 1.3.2.2 yamt npf_session_t * npf_session_inspect(npf_cache_t *, nbuf_t *, 175 1.3.2.2 yamt struct ifnet *, const int); 176 1.3.2.2 yamt npf_session_t * npf_session_establish(const npf_cache_t *, 177 1.3.2.2 yamt npf_nat_t *, const int); 178 1.3.2.2 yamt void npf_session_release(npf_session_t *); 179 1.3.2.2 yamt bool npf_session_pass(const npf_session_t *); 180 1.3.2.2 yamt void npf_session_setpass(npf_session_t *); 181 1.3.2.2 yamt void npf_session_link(npf_session_t *, npf_session_t *); 182 1.3.2.2 yamt npf_nat_t * npf_session_retnat(npf_session_t *, const int, bool *); 183 1.3.2.2 yamt 184 1.3.2.2 yamt /* NAT. */ 185 1.3.2.2 yamt void npf_nat_sysinit(void); 186 1.3.2.2 yamt void npf_nat_sysfini(void); 187 1.3.2.2 yamt npf_natpolicy_t *npf_nat_newpolicy(int, int, in_addr_t, in_port_t); 188 1.3.2.2 yamt void npf_nat_freepolicy(npf_natpolicy_t *); 189 1.3.2.2 yamt void npf_nat_flush(void); 190 1.3.2.2 yamt void npf_nat_reload(npf_ruleset_t *); 191 1.3.2.2 yamt 192 1.3.2.2 yamt int npf_do_nat(npf_cache_t *, npf_session_t *, nbuf_t *, 193 1.3.2.2 yamt struct ifnet *, const int); 194 1.3.2.2 yamt void npf_nat_expire(npf_nat_t *); 195 1.3.2.2 yamt void npf_nat_getorig(npf_nat_t *, in_addr_t *, in_port_t *); 196 1.3.2.2 yamt void npf_nat_setalg(npf_nat_t *, npf_alg_t *, uintptr_t); 197 1.3.2.2 yamt 198 1.3.2.2 yamt /* ALG interface. */ 199 1.3.2.2 yamt void npf_alg_sysinit(void); 200 1.3.2.2 yamt void npf_alg_sysfini(void); 201 1.3.2.2 yamt npf_alg_t * npf_alg_register(npf_algfunc_t, npf_algfunc_t, 202 1.3.2.2 yamt npf_algfunc_t, npf_algfunc_t); 203 1.3.2.2 yamt int npf_alg_unregister(npf_alg_t *); 204 1.3.2.2 yamt void npf_alg_match(npf_cache_t *, nbuf_t *, npf_nat_t *); 205 1.3.2.2 yamt void npf_alg_exec(npf_cache_t *, nbuf_t *, npf_nat_t *, const int ); 206 1.3.2.2 yamt bool npf_alg_sessionid(npf_cache_t *, nbuf_t *, npf_cache_t *); 207 1.3.2.2 yamt 208 1.3.2.2 yamt /* Debugging routines. */ 209 1.3.2.2 yamt void npf_rulenc_dump(npf_rule_t *); 210 1.3.2.2 yamt void npf_sessions_dump(void); 211 1.3.2.2 yamt void npf_nat_dump(npf_nat_t *); 212 1.3.2.2 yamt 213 1.3.2.2 yamt #endif 214
Indexes created Fri Oct 03 14:09:59 GMT 2025