npfctl.h revision 1.52
1 /*- 2 * Copyright (c) 2009-2017 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This material is based upon work partially supported by The 6 * NetBSD Foundation under a contract with Mindaugas Rasiukevicius. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef _NPFCTL_H_ 31 #define _NPFCTL_H_ 32 33 #include <stdio.h> 34 #include <stdbool.h> 35 #include <inttypes.h> 36 #include <assert.h> 37 #include <util.h> 38 39 #define NPF_BPFCOP 40 #include <net/npf.h> 41 42 #define _NPF_PRIVATE 43 #include <npf.h> 44 45 #include "npf_var.h" 46 47 #define NPF_DEV_PATH "/dev/npf" 48 #define NPF_CONF_PATH "/etc/npf.conf" 49 #define NPF_DB_PATH "/var/db/npf.db" 50 51 typedef struct fam_addr_mask { 52 sa_family_t fam_family; 53 npf_addr_t fam_addr; 54 npf_netmask_t fam_mask; 55 unsigned long fam_ifindex; 56 } fam_addr_mask_t; 57 58 typedef struct ifnet_addr { 59 char * ifna_name; 60 unsigned long ifna_index; 61 sa_family_t ifna_family; 62 npfvar_t * ifna_filter; 63 npfvar_t * ifna_addrs; 64 } ifnet_addr_t; 65 66 typedef struct port_range { 67 in_port_t pr_start; 68 in_port_t pr_end; 69 } port_range_t; 70 71 typedef struct addr_port { 72 npfvar_t * ap_netaddr; 73 npfvar_t * ap_portrange; 74 } addr_port_t; 75 76 typedef struct filt_opts { 77 addr_port_t fo_from; 78 addr_port_t fo_to; 79 bool fo_finvert; 80 bool fo_tinvert; 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 const char * rg_ifname; 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 typedef enum { 106 NPFCTL_PARSE_DEFAULT, 107 NPFCTL_PARSE_RULE, 108 NPFCTL_PARSE_MAP 109 } parse_entry_t; 110 111 #define NPF_IFNET_TABLE_PREF ".ifnet-" 112 #define NPF_IFNET_TABLE_PREFLEN (sizeof(NPF_IFNET_TABLE_PREF) - 1) 113 114 bool join(char *, size_t, int, char **, const char *); 115 void yyerror(const char *, ...) __printflike(1, 2) __dead; 116 void npfctl_bpfjit(bool); 117 void npfctl_parse_file(const char *); 118 void npfctl_parse_string(const char *, parse_entry_t); 119 120 void npfctl_print_error(const npf_error_t *); 121 char * npfctl_print_addrmask(int, const char *, const npf_addr_t *, 122 npf_netmask_t); 123 void npfctl_note_interface(const char *); 124 nl_table_t * npfctl_table_getbyname(nl_config_t *, const char *); 125 unsigned npfctl_table_getid(const char *); 126 const char * npfctl_table_getname(nl_config_t *, unsigned, bool *); 127 int npfctl_protono(const char *); 128 in_port_t npfctl_portno(const char *); 129 uint8_t npfctl_icmpcode(int, uint8_t, const char *); 130 uint8_t npfctl_icmptype(int, const char *); 131 npfvar_t * npfctl_ifnet_table(const char *); 132 npfvar_t * npfctl_parse_ifnet(const char *, const int); 133 npfvar_t * npfctl_parse_tcpflag(const char *); 134 npfvar_t * npfctl_parse_table_id(const char *); 135 npfvar_t * npfctl_parse_icmp(int, int, int); 136 npfvar_t * npfctl_parse_port_range(in_port_t, in_port_t); 137 npfvar_t * npfctl_parse_port_range_variable(const char *, npfvar_t *); 138 npfvar_t * npfctl_parse_fam_addr_mask(const char *, const char *, 139 unsigned long *); 140 bool npfctl_parse_cidr(char *, fam_addr_mask_t *, int *); 141 uint16_t npfctl_npt66_calcadj(npf_netmask_t, const npf_addr_t *, 142 const npf_addr_t *); 143 int npfctl_nat_ruleset_p(const char *, bool *); 144 145 /* 146 * NPF extension loading. 147 */ 148 149 typedef struct npf_extmod npf_extmod_t; 150 151 npf_extmod_t * npf_extmod_get(const char *, nl_ext_t **); 152 int npf_extmod_param(npf_extmod_t *, nl_ext_t *, 153 const char *, const char *); 154 155 /* 156 * BFF byte-code generation interface. 157 */ 158 159 typedef struct npf_bpf npf_bpf_t; 160 161 #define MATCH_DST 0x01 162 #define MATCH_SRC 0x02 163 #define MATCH_INVERT 0x04 164 165 enum { 166 BM_IPVER, BM_PROTO, BM_SRC_CIDR, BM_SRC_TABLE, BM_DST_CIDR, 167 BM_DST_TABLE, BM_SRC_PORTS, BM_DST_PORTS, BM_TCPFL, BM_ICMP_TYPE, 168 BM_ICMP_CODE, 169 }; 170 171 npf_bpf_t * npfctl_bpf_create(void); 172 struct bpf_program *npfctl_bpf_complete(npf_bpf_t *); 173 const void * npfctl_bpf_bmarks(npf_bpf_t *, size_t *); 174 void npfctl_bpf_destroy(npf_bpf_t *); 175 176 void npfctl_bpf_group_enter(npf_bpf_t *); 177 void npfctl_bpf_group_exit(npf_bpf_t *, bool); 178 179 void npfctl_bpf_proto(npf_bpf_t *, sa_family_t, int); 180 void npfctl_bpf_cidr(npf_bpf_t *, u_int, sa_family_t, 181 const npf_addr_t *, const npf_netmask_t); 182 void npfctl_bpf_ports(npf_bpf_t *, u_int, in_port_t, in_port_t); 183 void npfctl_bpf_tcpfl(npf_bpf_t *, uint8_t, uint8_t, bool); 184 void npfctl_bpf_icmp(npf_bpf_t *, int, int); 185 void npfctl_bpf_table(npf_bpf_t *, u_int, u_int); 186 187 /* 188 * Configuration building interface. 189 */ 190 191 #define NPFCTL_NAT_DYNAMIC 1 192 #define NPFCTL_NAT_STATIC 2 193 194 void npfctl_config_init(bool); 195 void npfctl_config_build(void); 196 int npfctl_config_send(int); 197 nl_config_t * npfctl_config_ref(void); 198 int npfctl_config_show(int); 199 void npfctl_config_save(nl_config_t *, const char *); 200 void npfctl_config_debug(const char *); 201 202 void npfctl_show_init(void); 203 int npfctl_ruleset_show(int, const char *); 204 205 nl_rule_t * npfctl_rule_ref(void); 206 nl_table_t * npfctl_table_ref(void); 207 bool npfctl_debug_addif(const char *); 208 209 nl_table_t * npfctl_load_table(const char *, int, u_int, const char *, FILE *); 210 211 void npfctl_build_alg(const char *); 212 void npfctl_build_rproc(const char *, npfvar_t *); 213 void npfctl_build_group(const char *, int, const char *, bool); 214 void npfctl_build_group_end(void); 215 void npfctl_build_rule(uint32_t, const char *, sa_family_t, 216 const opt_proto_t *, const filt_opts_t *, 217 const char *, const char *); 218 void npfctl_build_natseg(int, int, unsigned, const char *, 219 const addr_port_t *, const addr_port_t *, 220 const opt_proto_t *, const filt_opts_t *, unsigned); 221 void npfctl_build_maprset(const char *, int, const char *); 222 void npfctl_build_table(const char *, u_int, const char *); 223 224 void npfctl_setparam(const char *, int); 225 226 /* 227 * For the systems which do not define TH_ECE and TW_CRW. 228 */ 229 #ifndef TH_ECE 230 #define TH_ECE 0x40 231 #endif 232 #ifndef TH_CWR 233 #define TH_CWR 0x80 234 #endif 235 236 #endif 237
Indexes created Mon Sep 29 03:10:08 GMT 2025