npfctl.h revision 1.30
1 /* $NetBSD: npfctl.h,v 1.30 2013/09/19 01:04:45 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 #define NPF_BPFCOP 42 #include <net/npf_ncode.h> 43 #include <net/npf.h> 44 45 #define _NPF_PRIVATE 46 #include <npf.h> 47 48 #include "npf_var.h" 49 50 #define NPF_DEV_PATH "/dev/npf" 51 #define NPF_CONF_PATH "/etc/npf.conf" 52 #define NPF_SESSDB_PATH "/var/db/npf_sessions.db" 53 54 typedef struct fam_addr_mask { 55 sa_family_t fam_family; 56 npf_addr_t fam_addr; 57 npf_netmask_t fam_mask; 58 unsigned long fam_ifindex; 59 } fam_addr_mask_t; 60 61 typedef struct ifnet_addr { 62 unsigned long ifna_index; 63 sa_family_t ifna_family; 64 npfvar_t * ifna_filter; 65 npfvar_t * ifna_addrs; 66 } ifnet_addr_t; 67 68 typedef struct port_range { 69 in_port_t pr_start; 70 in_port_t pr_end; 71 } port_range_t; 72 73 typedef struct addr_port { 74 npfvar_t * ap_netaddr; 75 npfvar_t * ap_portrange; 76 } addr_port_t; 77 78 typedef struct filt_opts { 79 addr_port_t fo_from; 80 addr_port_t fo_to; 81 } filt_opts_t; 82 83 typedef struct opt_proto { 84 int op_proto; 85 npfvar_t * op_opts; 86 } opt_proto_t; 87 88 typedef struct rule_group { 89 const char * rg_name; 90 uint32_t rg_attr; 91 u_int rg_ifnum; 92 bool rg_default; 93 } rule_group_t; 94 95 typedef struct proc_call { 96 const char * pc_name; 97 npfvar_t * pc_opts; 98 } proc_call_t; 99 100 typedef struct proc_param { 101 const char * pp_param; 102 const char * pp_value; 103 } proc_param_t; 104 105 enum { NPFCTL_PARSE_FILE, NPFCTL_PARSE_STRING }; 106 107 bool join(char *, size_t, int, char **, const char *); 108 void yyerror(const char *, ...) __printflike(1, 2) __dead; 109 void npfctl_parse_file(const char *); 110 void npfctl_parse_string(const char *); 111 112 void npfctl_print_error(const nl_error_t *); 113 char * npfctl_print_addrmask(int, const npf_addr_t *, npf_netmask_t); 114 bool npfctl_table_exists_p(const char *); 115 int npfctl_protono(const char *); 116 in_port_t npfctl_portno(const char *); 117 uint8_t npfctl_icmpcode(int, uint8_t, const char *); 118 uint8_t npfctl_icmptype(int, const char *); 119 unsigned long npfctl_find_ifindex(const char *); 120 npfvar_t * npfctl_parse_ifnet(const char *, const int); 121 npfvar_t * npfctl_parse_tcpflag(const char *); 122 npfvar_t * npfctl_parse_table_id(const char *); 123 npfvar_t * npfctl_parse_icmp(int, int, int); 124 npfvar_t * npfctl_parse_port_range(in_port_t, in_port_t); 125 npfvar_t * npfctl_parse_port_range_variable(const char *); 126 npfvar_t * npfctl_parse_fam_addr_mask(const char *, const char *, 127 unsigned long *); 128 bool npfctl_parse_cidr(char *, fam_addr_mask_t *, int *); 129 130 /* 131 * NPF extension loading. 132 */ 133 134 typedef struct npf_extmod npf_extmod_t; 135 136 npf_extmod_t * npf_extmod_get(const char *, nl_ext_t **); 137 int npf_extmod_param(npf_extmod_t *, nl_ext_t *, 138 const char *, const char *); 139 140 /* 141 * BFF byte-code generation interface. 142 */ 143 144 #define NPFCTL_USE_BPF 1 145 146 typedef struct npf_bpf npf_bpf_t; 147 148 #define MATCH_DST 0x01 149 #define MATCH_SRC 0x02 150 151 enum { 152 BM_IPVER, 153 BM_PROTO, 154 BM_SRC_CIDR, 155 BM_SRC_TABLE, 156 BM_DST_CIDR, 157 BM_DST_TABLE, 158 BM_SRC_PORTS, 159 BM_DST_PORTS, 160 BM_TCPFL, 161 BM_ICMP_TYPE, 162 BM_ICMP_CODE, 163 }; 164 165 npf_bpf_t *npfctl_bpf_create(void); 166 struct bpf_program *npfctl_bpf_complete(npf_bpf_t *); 167 const void *npfctl_bpf_bmarks(npf_bpf_t *, size_t *); 168 void npfctl_bpf_destroy(npf_bpf_t *); 169 170 void npfctl_bpf_group(npf_bpf_t *); 171 void npfctl_bpf_endgroup(npf_bpf_t *); 172 173 void npfctl_bpf_proto(npf_bpf_t *, sa_family_t, int); 174 void npfctl_bpf_cidr(npf_bpf_t *, u_int, sa_family_t, 175 const npf_addr_t *, const npf_netmask_t); 176 void npfctl_bpf_ports(npf_bpf_t *, u_int, in_port_t, in_port_t); 177 void npfctl_bpf_tcpfl(npf_bpf_t *, uint8_t, uint8_t); 178 void npfctl_bpf_icmp(npf_bpf_t *, int, int); 179 void npfctl_bpf_table(npf_bpf_t *, u_int, u_int); 180 181 /* 182 * N-code generation interface. 183 */ 184 185 typedef struct nc_ctx nc_ctx_t; 186 187 #define NC_MATCH_DST 0x01 188 #define NC_MATCH_SRC 0x02 189 190 #define NC_MATCH_TCP 0x04 191 #define NC_MATCH_UDP 0x08 192 #define NC_MATCH_ICMP 0x10 193 #define NC_MATCH_ICMP6 0x20 194 195 nc_ctx_t * npfctl_ncgen_create(void); 196 void * npfctl_ncgen_complete(nc_ctx_t *, size_t *); 197 void npfctl_ncgen_print(const void *, size_t); 198 199 void npfctl_ncgen_group(nc_ctx_t *); 200 void npfctl_ncgen_endgroup(nc_ctx_t *); 201 202 void npfctl_gennc_v4cidr(nc_ctx_t *, int, const npf_addr_t *, 203 const npf_netmask_t); 204 void npfctl_gennc_v6cidr(nc_ctx_t *, int, const npf_addr_t *, 205 const npf_netmask_t); 206 void npfctl_gennc_ports(nc_ctx_t *, int, in_port_t, in_port_t); 207 void npfctl_gennc_icmp(nc_ctx_t *, int, int); 208 void npfctl_gennc_icmp6(nc_ctx_t *, int, int); 209 void npfctl_gennc_tbl(nc_ctx_t *, int, u_int); 210 void npfctl_gennc_tcpfl(nc_ctx_t *, uint8_t, uint8_t); 211 void npfctl_gennc_proto(nc_ctx_t *ctx, uint8_t, uint8_t); 212 213 /* 214 * N-code disassembler. 215 */ 216 217 typedef struct nc_inf nc_inf_t; 218 219 nc_inf_t * npfctl_ncode_disinf(FILE *); 220 int npfctl_ncode_disassemble(nc_inf_t *, const void *, size_t); 221 222 /* 223 * Configuration building interface. 224 */ 225 226 #define NPFCTL_NAT_DYNAMIC 1 227 #define NPFCTL_NAT_STATIC 2 228 229 void npfctl_config_init(bool); 230 int npfctl_config_send(int, const char *); 231 nl_config_t * npfctl_config_ref(void); 232 int npfctl_config_show(int); 233 int npfctl_ruleset_show(int, const char *); 234 235 nl_rule_t * npfctl_rule_ref(void); 236 unsigned long npfctl_debug_addif(const char *); 237 238 void npfctl_build_alg(const char *); 239 void npfctl_build_rproc(const char *, npfvar_t *); 240 void npfctl_build_group(const char *, int, u_int, bool); 241 void npfctl_build_group_end(void); 242 void npfctl_build_rule(uint32_t, u_int, sa_family_t, 243 const opt_proto_t *, const filt_opts_t *, const char *); 244 void npfctl_build_natseg(int, int, u_int, const addr_port_t *, 245 const addr_port_t *, const filt_opts_t *); 246 void npfctl_build_maprset(const char *, int, u_int); 247 void npfctl_build_table(const char *, u_int, const char *); 248 249 #endif 250
Indexes created Tue Sep 30 11:09:46 GMT 2025