1 /* $NetBSD: npf.h,v 1.16 2013/03/20 00:29:46 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2011-2013 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 int npf_config_submit(nl_config_t *, int); 78 void npf_config_destroy(nl_config_t *); 79 nl_config_t * npf_config_retrieve(int, bool *, bool *); 80 int npf_config_flush(int); 81 82 int npf_ruleset_add(int, const char *, nl_rule_t *, uint64_t *); 83 int npf_ruleset_remove(int, const char *, uint64_t); 84 int npf_ruleset_remkey(int, const char *, const void *, size_t); 85 int npf_ruleset_flush(int, const char *); 86 87 nl_ext_t * npf_ext_construct(const char *name); 88 void npf_ext_param_u32(nl_ext_t *, const char *, uint32_t); 89 void npf_ext_param_bool(nl_ext_t *, const char *, bool); 90 91 nl_rule_t * npf_rule_create(const char *, uint32_t, u_int); 92 int npf_rule_setcode(nl_rule_t *, int, const void *, size_t); 93 int npf_rule_setprio(nl_rule_t *, pri_t); 94 int npf_rule_setproc(nl_rule_t *, const char *); 95 int npf_rule_setkey(nl_rule_t *, const void *, size_t); 96 bool npf_rule_exists_p(nl_config_t *, const char *); 97 int npf_rule_insert(nl_config_t *, nl_rule_t *, nl_rule_t *); 98 void * npf_rule_export(nl_rule_t *, size_t *); 99 void npf_rule_destroy(nl_rule_t *); 100 101 nl_rproc_t * npf_rproc_create(const char *); 102 int npf_rproc_extcall(nl_rproc_t *, nl_ext_t *); 103 bool npf_rproc_exists_p(nl_config_t *, const char *); 104 int npf_rproc_insert(nl_config_t *, nl_rproc_t *); 105 106 nl_nat_t * npf_nat_create(int, u_int, u_int, npf_addr_t *, int, in_port_t); 107 int npf_nat_insert(nl_config_t *, nl_nat_t *, pri_t); 108 109 nl_table_t * npf_table_create(u_int, int); 110 int npf_table_add_entry(nl_table_t *, int, 111 const npf_addr_t *, const npf_netmask_t); 112 bool npf_table_exists_p(nl_config_t *, u_int); 113 int npf_table_insert(nl_config_t *, nl_table_t *); 114 void npf_table_destroy(nl_table_t *); 115 116 #ifdef _NPF_PRIVATE 117 118 #include <ifaddrs.h> 119 120 int npf_sessions_send(int, const char *); 121 int npf_sessions_recv(int, const char *); 122 123 void _npf_config_error(nl_config_t *, nl_error_t *); 124 void _npf_config_setsubmit(nl_config_t *, const char *); 125 int _npf_ruleset_list(int, const char *, nl_config_t *); 126 int _npf_rule_foreach(nl_config_t *, nl_rule_callback_t); 127 pri_t _npf_rule_getinfo(nl_rule_t *, const char **, uint32_t *, 128 u_int *); 129 const void * _npf_rule_ncode(nl_rule_t *, size_t *); 130 const char * _npf_rule_rproc(nl_rule_t *); 131 int _npf_nat_foreach(nl_config_t *, nl_rule_callback_t); 132 void _npf_nat_getinfo(nl_nat_t *, int *, u_int *, npf_addr_t *, 133 size_t *, in_port_t *); 134 void _npf_table_foreach(nl_config_t *, nl_table_callback_t); 135 136 void _npf_debug_addif(nl_config_t *, struct ifaddrs *, u_int); 137 138 /* The ALG interface is experimental */ 139 int _npf_alg_load(nl_config_t *, const char *); 140 int _npf_alg_unload(nl_config_t *, const char *); 141 142 #endif 143 144 __END_DECLS 145 146 #endif /* _NPF_LIB_H_ */ 147