npfctl.h revision 1.26
1 /* $NetBSD: npfctl.h,v 1.26 2013/02/10 23:47:37 rmind Exp $ */ 2 3 /*- 4 * Copyright (c) 2009-2013 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 _NPFCTL_H_ 33 #define _NPFCTL_H_ 34 35 #include <stdio.h> 36 #include <stdbool.h> 37 #include <inttypes.h> 38 #include <assert.h> 39 #include <util.h> 40 41 #include <net/npf_ncode.h> 42 #include <net/npf.h> 43 44 #define _NPF_PRIVATE 45 #include <npf.h> 46 47 #include "npf_var.h" 48 49 #define NPF_DEV_PATH "/dev/npf" 50 #define NPF_CONF_PATH "/etc/npf.conf" 51 #define NPF_SESSDB_PATH "/var/db/npf_sessions.db" 52 53 typedef struct fam_addr_mask { 54 sa_family_t fam_family; 55 npf_addr_t fam_addr; 56 npf_netmask_t fam_mask; 57 unsigned long fam_ifindex; 58 } fam_addr_mask_t; 59 60 typedef struct ifnet_addr { 61 unsigned long ifna_index; 62 sa_family_t ifna_family; 63 npfvar_t * ifna_filter; 64 npfvar_t * ifna_addrs; 65 } ifnet_addr_t; 66 67 typedef struct port_range { 68 in_port_t pr_start; 69 in_port_t pr_end; 70 } port_range_t; 71 72 typedef struct addr_port { 73 npfvar_t * ap_netaddr; 74 npfvar_t * ap_portrange; 75 } addr_port_t; 76 77 typedef struct filt_opts { 78 addr_port_t fo_from; 79 addr_port_t fo_to; 80 } filt_opts_t; 81 82 typedef struct opt_proto { 83 int op_proto; 84 npfvar_t * op_opts; 85 } opt_proto_t; 86 87 typedef struct rule_group { 88 const char * rg_name; 89 uint32_t rg_attr; 90 u_int rg_ifnum; 91 bool rg_default; 92 } rule_group_t; 93 94 typedef struct proc_call { 95 const char * pc_name; 96 npfvar_t * pc_opts; 97 } proc_call_t; 98 99 typedef struct proc_param { 100 const char * pp_param; 101 const char * pp_value; 102 } proc_param_t; 103 104 enum { NPFCTL_PARSE_FILE, NPFCTL_PARSE_STRING }; 105 106 void yyerror(const char *, ...) __printflike(1, 2) __dead; 107 void npfctl_parse_file(const char *); 108 void npfctl_parse_string(const char *); 109 110 void npfctl_print_error(const nl_error_t *); 111 char * npfctl_print_addrmask(int, npf_addr_t *, npf_netmask_t); 112 bool npfctl_table_exists_p(const char *); 113 int npfctl_protono(const char *); 114 in_port_t npfctl_portno(const char *); 115 uint8_t npfctl_icmpcode(int, uint8_t, const char *); 116 uint8_t npfctl_icmptype(int, const char *); 117 unsigned long npfctl_find_ifindex(const char *); 118 npfvar_t * npfctl_parse_ifnet(const char *, const int); 119 npfvar_t * npfctl_parse_tcpflag(const char *); 120 npfvar_t * npfctl_parse_table_id(const char *); 121 npfvar_t * npfctl_parse_icmp(int, int, int); 122 npfvar_t * npfctl_parse_port_range(in_port_t, in_port_t); 123 npfvar_t * npfctl_parse_port_range_variable(const char *); 124 npfvar_t * npfctl_parse_fam_addr_mask(const char *, const char *, 125 unsigned long *); 126 bool npfctl_parse_cidr(char *, fam_addr_mask_t *, int *); 127 128 /* 129 * NPF extension loading. 130 */ 131 132 typedef struct npf_extmod npf_extmod_t; 133 134 npf_extmod_t * npf_extmod_get(const char *, nl_ext_t **); 135 int npf_extmod_param(npf_extmod_t *, nl_ext_t *, 136 const char *, const char *); 137 138 /* 139 * N-code generation interface. 140 */ 141 142 typedef struct nc_ctx nc_ctx_t; 143 144 #define NC_MATCH_DST 0x01 145 #define NC_MATCH_SRC 0x02 146 147 #define NC_MATCH_TCP 0x04 148 #define NC_MATCH_UDP 0x08 149 #define NC_MATCH_ICMP 0x10 150 #define NC_MATCH_ICMP6 0x20 151 152 nc_ctx_t * npfctl_ncgen_create(void); 153 void * npfctl_ncgen_complete(nc_ctx_t *, size_t *); 154 void npfctl_ncgen_print(const void *, size_t); 155 156 void npfctl_ncgen_group(nc_ctx_t *); 157 void npfctl_ncgen_endgroup(nc_ctx_t *); 158 159 void npfctl_gennc_v4cidr(nc_ctx_t *, int, const npf_addr_t *, 160 const npf_netmask_t); 161 void npfctl_gennc_v6cidr(nc_ctx_t *, int, const npf_addr_t *, 162 const npf_netmask_t); 163 void npfctl_gennc_ports(nc_ctx_t *, int, in_port_t, in_port_t); 164 void npfctl_gennc_icmp(nc_ctx_t *, int, int); 165 void npfctl_gennc_icmp6(nc_ctx_t *, int, int); 166 void npfctl_gennc_tbl(nc_ctx_t *, int, u_int); 167 void npfctl_gennc_tcpfl(nc_ctx_t *, uint8_t, uint8_t); 168 void npfctl_gennc_proto(nc_ctx_t *ctx, uint8_t, uint8_t); 169 170 /* 171 * N-code disassembler. 172 */ 173 174 typedef struct nc_inf nc_inf_t; 175 176 nc_inf_t * npfctl_ncode_disinf(FILE *); 177 int npfctl_ncode_disassemble(nc_inf_t *, const void *, size_t); 178 179 /* 180 * Configuration building interface. 181 */ 182 183 #define NPFCTL_NAT_DYNAMIC 1 184 #define NPFCTL_NAT_STATIC 2 185 186 void npfctl_config_init(bool); 187 int npfctl_config_send(int, const char *); 188 nl_config_t * npfctl_config_ref(void); 189 int npfctl_config_show(int); 190 int npfctl_ruleset_show(int, const char *); 191 192 nl_rule_t * npfctl_rule_ref(void); 193 unsigned long npfctl_debug_addif(const char *); 194 195 void npfctl_build_rproc(const char *, npfvar_t *); 196 void npfctl_build_group(const char *, int, u_int, bool); 197 void npfctl_build_group_end(void); 198 void npfctl_build_rule(int, u_int, sa_family_t, 199 const opt_proto_t *, const filt_opts_t *, const char *); 200 void npfctl_build_natseg(int, int, u_int, const addr_port_t *, 201 const addr_port_t *, const filt_opts_t *); 202 void npfctl_build_table(const char *, u_int, const char *); 203 204 #endif 205
Indexes created Fri Sep 26 20:09:58 GMT 2025