npfctl.h revision 1.49
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 enum { NPFCTL_PARSE_FILE, NPFCTL_PARSE_STRING }; 106 107 #define NPF_IFNET_TABLE_PREF ".ifnet-" 108 #define NPF_IFNET_TABLE_PREFLEN (sizeof(NPF_IFNET_TABLE_PREF) - 1) 109 110 bool join(char *, size_t, int, char **, const char *); 111 void yyerror(const char *, ...) __printflike(1, 2) __dead; 112 void npfctl_bpfjit(bool); 113 void npfctl_parse_file(const char *); 114 void npfctl_parse_string(const char *); 115 116 void npfctl_print_error(const npf_error_t *); 117 char * npfctl_print_addrmask(int, const char *, const npf_addr_t *, 118 npf_netmask_t); 119 void npfctl_note_interface(const char *); 120 unsigned npfctl_table_getid(const char *); 121 const char * npfctl_table_getname(nl_config_t *, unsigned, bool *); 122 int npfctl_protono(const char *); 123 in_port_t npfctl_portno(const char *); 124 uint8_t npfctl_icmpcode(int, uint8_t, const char *); 125 uint8_t npfctl_icmptype(int, const char *); 126 npfvar_t * npfctl_ifnet_table(const char *); 127 npfvar_t * npfctl_parse_ifnet(const char *, const int); 128 npfvar_t * npfctl_parse_tcpflag(const char *); 129 npfvar_t * npfctl_parse_table_id(const char *); 130 npfvar_t * npfctl_parse_icmp(int, int, int); 131 npfvar_t * npfctl_parse_port_range(in_port_t, in_port_t); 132 npfvar_t * npfctl_parse_port_range_variable(const char *, npfvar_t *); 133 npfvar_t * npfctl_parse_fam_addr_mask(const char *, const char *, 134 unsigned long *); 135 bool npfctl_parse_cidr(char *, fam_addr_mask_t *, int *); 136 uint16_t npfctl_npt66_calcadj(npf_netmask_t, const npf_addr_t *, 137 const npf_addr_t *); 138 139 /* 140 * NPF extension loading. 141 */ 142 143 typedef struct npf_extmod npf_extmod_t; 144 145 npf_extmod_t * npf_extmod_get(const char *, nl_ext_t **); 146 int npf_extmod_param(npf_extmod_t *, nl_ext_t *, 147 const char *, const char *); 148 149 /* 150 * BFF byte-code generation interface. 151 */ 152 153 typedef struct npf_bpf npf_bpf_t; 154 155 #define MATCH_DST 0x01 156 #define MATCH_SRC 0x02 157 #define MATCH_INVERT 0x04 158 159 enum { 160 BM_IPVER, BM_PROTO, BM_SRC_CIDR, BM_SRC_TABLE, BM_DST_CIDR, 161 BM_DST_TABLE, BM_SRC_PORTS, BM_DST_PORTS, BM_TCPFL, 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_enter(npf_bpf_t *); 171 void npfctl_bpf_group_exit(npf_bpf_t *, bool); 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, bool); 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 * Configuration building interface. 183 */ 184 185 #define NPFCTL_NAT_DYNAMIC 1 186 #define NPFCTL_NAT_STATIC 2 187 188 void npfctl_config_init(bool); 189 int npfctl_config_send(int); 190 nl_config_t * npfctl_config_ref(void); 191 int npfctl_config_show(int); 192 void npfctl_config_save(nl_config_t *, const char *); 193 void npfctl_config_debug(const char *); 194 195 void npfctl_show_init(void); 196 int npfctl_ruleset_show(int, const char *); 197 198 nl_rule_t * npfctl_rule_ref(void); 199 bool npfctl_debug_addif(const char *); 200 201 void npfctl_build_alg(const char *); 202 void npfctl_build_rproc(const char *, npfvar_t *); 203 void npfctl_build_group(const char *, int, const char *, bool); 204 void npfctl_build_group_end(void); 205 void npfctl_build_rule(uint32_t, const char *, sa_family_t, 206 const opt_proto_t *, const filt_opts_t *, 207 const char *, const char *); 208 void npfctl_build_natseg(int, int, unsigned, const char *, 209 const addr_port_t *, const addr_port_t *, 210 const opt_proto_t *, const filt_opts_t *, unsigned); 211 void npfctl_build_maprset(const char *, int, const char *); 212 void npfctl_build_table(const char *, u_int, const char *); 213 214 void npfctl_setparam(const char *, int); 215 216 /* 217 * For the systems which do not define TH_ECE and TW_CRW. 218 */ 219 #ifndef TH_ECE 220 #define TH_ECE 0x40 221 #endif 222 #ifndef TH_CWR 223 #define TH_CWR 0x80 224 #endif 225 226 #endif 227
Indexes created Mon Sep 29 21:09:56 GMT 2025