1 /* $NetBSD: npf.h,v 1.30 2016/12/10 21:04:12 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2011-2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This material is based upon work partially supported by The 8 * NetBSD Foundation under a contract with Mindaugas Rasiukevicius. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _NPF_LIB_H_ 33 #define _NPF_LIB_H_ 34 35 #include <sys/types.h> 36 #include <net/npf.h> 37 38 __BEGIN_DECLS 39 40 struct nl_config; 41 struct nl_rule; 42 struct nl_rproc; 43 struct nl_table; 44 struct nl_ext; 45 46 typedef struct nl_config nl_config_t; 47 typedef struct nl_rule nl_rule_t; 48 typedef struct nl_rproc nl_rproc_t; 49 typedef struct nl_table nl_table_t; 50 51 typedef struct nl_rule nl_nat_t; 52 53 typedef struct nl_ext nl_ext_t; 54 55 typedef int (*npfext_initfunc_t)(void); 56 typedef nl_ext_t *(*npfext_consfunc_t)(const char *); 57 typedef int (*npfext_paramfunc_t)(nl_ext_t *, const char *, const char *); 58 59 #ifdef _NPF_PRIVATE 60 61 typedef struct { 62 int ne_id; 63 char * ne_source_file; 64 u_int ne_source_line; 65 int ne_ncode_error; 66 int ne_ncode_errat; 67 } nl_error_t; 68 69 typedef void (*nl_rule_callback_t)(nl_rule_t *, unsigned); 70 typedef void (*nl_table_callback_t)(unsigned, int); 71 72 #endif 73 74 #define NPF_MAX_TABLE_ID (16) 75 76 nl_config_t * npf_config_create(void); 77 void npf_config_destroy(nl_config_t *); 78 79 int npf_config_submit(nl_config_t *, int); 80 nl_config_t * npf_config_retrieve(int, bool *, bool *); 81 nl_config_t * npf_config_import(const char *); 82 int npf_config_export(const nl_config_t *, const char *); 83 int npf_config_flush(int); 84 85 int npf_ruleset_add(int, const char *, nl_rule_t *, uint64_t *); 86 int npf_ruleset_remove(int, const char *, uint64_t); 87 int npf_ruleset_remkey(int, const char *, const void *, size_t); 88 int npf_ruleset_flush(int, const char *); 89 90 nl_ext_t * npf_ext_construct(const char *name); 91 void npf_ext_param_u32(nl_ext_t *, const char *, uint32_t); 92 void npf_ext_param_bool(nl_ext_t *, const char *, bool); 93 void npf_ext_param_string(nl_ext_t *, const char *, const char *); 94 95 nl_rule_t * npf_rule_create(const char *, uint32_t, const char *); 96 int npf_rule_setcode(nl_rule_t *, int, const void *, size_t); 97 int npf_rule_setprio(nl_rule_t *, pri_t); 98 int npf_rule_setproc(nl_rule_t *, const char *); 99 int npf_rule_setkey(nl_rule_t *, const void *, size_t); 100 int npf_rule_setinfo(nl_rule_t *, const void *, size_t); 101 bool npf_rule_exists_p(nl_config_t *, const char *); 102 int npf_rule_insert(nl_config_t *, nl_rule_t *, nl_rule_t *); 103 void * npf_rule_export(nl_rule_t *, size_t *); 104 void npf_rule_destroy(nl_rule_t *); 105 106 nl_rproc_t * npf_rproc_create(const char *); 107 int npf_rproc_extcall(nl_rproc_t *, nl_ext_t *); 108 bool npf_rproc_exists_p(nl_config_t *, const char *); 109 int npf_rproc_insert(nl_config_t *, nl_rproc_t *); 110 111 nl_nat_t * npf_nat_create(int, u_int, const char *, 112 int, npf_addr_t *, npf_netmask_t, in_port_t); 113 int npf_nat_insert(nl_config_t *, nl_nat_t *, pri_t); 114 int npf_nat_lookup(int, int, npf_addr_t *[2], in_port_t [2], int, int); 115 116 nl_table_t * npf_table_create(const char *, u_int, int); 117 int npf_table_add_entry(nl_table_t *, int, 118 const npf_addr_t *, const npf_netmask_t); 119 int npf_table_setdata(nl_table_t *, const void *, size_t); 120 int npf_table_insert(nl_config_t *, nl_table_t *); 121 void npf_table_destroy(nl_table_t *); 122 123 #ifdef _NPF_PRIVATE 124 125 #include <ifaddrs.h> 126 127 nl_rule_t * npf_rule_iterate(nl_config_t *, unsigned *); 128 const char * npf_rule_getname(nl_rule_t *); 129 uint32_t npf_rule_getattr(nl_rule_t *); 130 const char * npf_rule_getinterface(nl_rule_t *); 131 const void * npf_rule_getinfo(nl_rule_t *, size_t *); 132 const char * npf_rule_getproc(nl_rule_t *); 133 uint64_t npf_rule_getid(nl_rule_t *); 134 const void * npf_rule_getcode(nl_rule_t *, int *, size_t *); 135 136 nl_table_t * npf_table_iterate(nl_config_t *); 137 const char * npf_table_getname(nl_table_t *); 138 unsigned npf_table_getid(nl_table_t *); 139 int npf_table_gettype(nl_table_t *); 140 141 nl_nat_t * npf_nat_iterate(nl_config_t *); 142 int npf_nat_gettype(nl_nat_t *); 143 unsigned npf_nat_getflags(nl_nat_t *); 144 void npf_nat_getmap(nl_nat_t *, npf_addr_t *, size_t *, in_port_t *); 145 146 int npf_nat_setalgo(nl_nat_t *, u_int); 147 int npf_nat_setnpt66(nl_nat_t *, uint16_t); 148 149 nl_rproc_t * npf_rproc_iterate(nl_config_t *); 150 const char * npf_rproc_getname(nl_rproc_t *); 151 152 void _npf_config_error(nl_config_t *, nl_error_t *); 153 void _npf_config_setsubmit(nl_config_t *, const char *); 154 int _npf_ruleset_list(int, const char *, nl_config_t *); 155 void _npf_debug_addif(nl_config_t *, const char *); 156 157 /* The ALG interface is experimental */ 158 int _npf_alg_load(nl_config_t *, const char *); 159 int _npf_alg_unload(nl_config_t *, const char *); 160 161 #endif 162 163 __END_DECLS 164 165 #endif /* _NPF_LIB_H_ */ 166