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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 | /* * Copyright (c) 2008-2013 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1993 Daniel Boulet * Copyright (c) 1994 Ugen J.S.Antsilevich * * Redistribution and use in source forms, with and without modification, * are permitted provided that this entire comment appears intact. * * Redistribution in binary form may occur without any restrictions. * Obviously, it would be nice if you gave credit where credit is due * but requiring it would be too onerous. * * This software is provided ``AS IS'' without any warranties of any kind. * */ #ifndef _IP6_FW_H #define _IP6_FW_H #ifdef __APPLE_API_OBSOLETE #include <sys/appleapiopts.h> /* * Define IPv6 Firewall event subclass, and associated events. */ /*! * @defined KEV_IP6FW_SUBCLASS * @discussion The kernel event subclass for IPv6 Firewall. */ #define KEV_IP6FW_SUBCLASS 2 /*! * @defined KEV_IP6FW_ADD * @discussion The event code indicating a rule has been added. */ #define KEV_IP6FW_ADD 1 /*! * @defined KEV_IP6FW_DEL * @discussion The event code indicating a rule has been removed. */ #define KEV_IP6FW_DEL 2 /*! * @defined KEV_IP6FW_FLUSH * @discussion The event code indicating the rule set has been flushed. */ #define KEV_IP6FW_FLUSH 3 /*! * @defined KEV_IP6FW_FLUSH * @discussion The event code indicating the enable flag has been changed */ #define KEV_IP6FW_ENABLE 4 #include <net/if.h> #define IPV6_FW_CURRENT_API_VERSION 20 /* Version of this API */ /* * This union structure identifies an interface, either explicitly * by name or implicitly by IP address. The flags IP_FW_F_IIFNAME * and IP_FW_F_OIFNAME say how to interpret this structure. An * interface unit number of -1 matches any unit number, while an * IP address of 0.0.0.0 indicates matches any interface. * * The receive and transmit interfaces are only compared against the * the packet if the corresponding bit (IP_FW_F_IIFACE or IP_FW_F_OIFACE) * is set. Note some packets lack a receive or transmit interface * (in which case the missing "interface" never matches). */ union ip6_fw_if { struct in6_addr fu_via_ip6; /* Specified by IPv6 address */ struct { /* Specified by interface name */ #define IP6FW_IFNLEN IFNAMSIZ char name[IP6FW_IFNLEN]; short unit; /* -1 means match any unit */ } fu_via_if; }; /* * Format of an IP firewall descriptor * * fw_src, fw_dst, fw_smsk, fw_dmsk are always stored in network byte order. * fw_flg and fw_n*p are stored in host byte order (of course). * Port numbers are stored in HOST byte order. * Warning: setsockopt() will fail if sizeof(struct ip_fw) > MLEN (108) */ struct ip6_fw { u_int32_t version; /* Version of this structure. Should always be */ /* set to IP6_FW_CURRENT_API_VERSION by clients. */ void *context; /* Context that is usable by user processes to */ /* identify this rule. */ u_int32_t fw_pcnt, fw_bcnt; /* Packet and byte counters */ struct in6_addr fw_src, fw_dst; /* Source and destination IPv6 addr */ struct in6_addr fw_smsk, fw_dmsk; /* Mask for src and dest IPv6 addr */ u_short fw_number; /* Rule number */ u_short fw_flg; /* Flags word */ #define IPV6_FW_MAX_PORTS 10 /* A reasonable maximum */ u_int fw_ipflg; /* IP flags word */ u_short fw_pts[IPV6_FW_MAX_PORTS]; /* Array of port numbers to match */ u_char fw_ip6opt, fw_ip6nopt; /* IPv6 options set/unset */ u_char fw_tcpf, fw_tcpnf; /* TCP flags set/unset */ #define IPV6_FW_ICMPTYPES_DIM (256 / (sizeof(unsigned) * 8)) unsigned fw_icmp6types[IPV6_FW_ICMPTYPES_DIM]; /* ICMP types bitmap */ long timestamp; /* timestamp (tv_sec) of last match */ union ip6_fw_if fw_in_if, fw_out_if;/* Incoming and outgoing interfaces */ union { u_short fu_divert_port; /* Divert/tee port (options IP6DIVERT) */ u_short fu_skipto_rule; /* SKIPTO command rule number */ u_short fu_reject_code; /* REJECT response code */ } fw_un; u_char fw_prot; /* IPv6 protocol */ u_char fw_nports; /* N'of src ports and # of dst ports */ /* in ports array (dst ports follow */ /* src ports; max of 10 ports in all; */ /* count of 0 means match all ports) */ }; #if defined(BSD_KERNEL_PRIVATE) #pragma pack(4) struct ip6_fw_32 { u_int32_t version; /* Version of this structure. Should always be */ /* set to IP6_FW_CURRENT_API_VERSION by clients. */ user32_addr_t context; /* Context that is usable by user processes to */ /* identify this rule. */ u_int32_t fw_pcnt, fw_bcnt; /* Packet and byte counters */ struct in6_addr fw_src, fw_dst; /* Source and destination IPv6 addr */ struct in6_addr fw_smsk, fw_dmsk; /* Mask for src and dest IPv6 addr */ u_short fw_number; /* Rule number */ u_short fw_flg; /* Flags word */ #define IPV6_FW_MAX_PORTS 10 /* A reasonable maximum */ u_int fw_ipflg; /* IP flags word */ u_short fw_pts[IPV6_FW_MAX_PORTS]; /* Array of port numbers to match */ u_char fw_ip6opt, fw_ip6nopt; /* IPv6 options set/unset */ u_char fw_tcpf, fw_tcpnf; /* TCP flags set/unset */ #define IPV6_FW_ICMPTYPES_DIM (256 / (sizeof(unsigned) * 8)) unsigned fw_icmp6types[IPV6_FW_ICMPTYPES_DIM]; /* ICMP types bitmap */ user32_time_t timestamp; /* timestamp (tv_sec) of last match */ union ip6_fw_if fw_in_if, fw_out_if;/* Incoming and outgoing interfaces */ union { u_short fu_divert_port; /* Divert/tee port (options IP6DIVERT) */ u_short fu_skipto_rule; /* SKIPTO command rule number */ u_short fu_reject_code; /* REJECT response code */ } fw_un; u_char fw_prot; /* IPv6 protocol */ u_char fw_nports; /* N'of src ports and # of dst ports */ /* in ports array (dst ports follow */ /* src ports; max of 10 ports in all; */ /* count of 0 means match all ports) */ }; #pragma pack() struct ip6_fw_64 { u_int32_t version; /* Version of this structure. Should always be */ /* set to IP6_FW_CURRENT_API_VERSION by clients. */ __uint64_t context __attribute__((aligned(8))); /* Context that is usable by user processes to */ /* identify this rule. */ u_int32_t fw_pcnt, fw_bcnt; /* Packet and byte counters */ struct in6_addr fw_src, fw_dst; /* Source and destination IPv6 addr */ struct in6_addr fw_smsk, fw_dmsk; /* Mask for src and dest IPv6 addr */ u_short fw_number; /* Rule number */ u_short fw_flg; /* Flags word */ #define IPV6_FW_MAX_PORTS 10 /* A reasonable maximum */ u_int fw_ipflg; /* IP flags word */ u_short fw_pts[IPV6_FW_MAX_PORTS]; /* Array of port numbers to match */ u_char fw_ip6opt, fw_ip6nopt; /* IPv6 options set/unset */ u_char fw_tcpf, fw_tcpnf; /* TCP flags set/unset */ #define IPV6_FW_ICMPTYPES_DIM (256 / (sizeof(unsigned) * 8)) unsigned fw_icmp6types[IPV6_FW_ICMPTYPES_DIM]; /* ICMP types bitmap */ user64_time_t timestamp; /* timestamp (tv_sec) of last match */ union ip6_fw_if fw_in_if, fw_out_if;/* Incoming and outgoing interfaces */ union { u_short fu_divert_port; /* Divert/tee port (options IP6DIVERT) */ u_short fu_skipto_rule; /* SKIPTO command rule number */ u_short fu_reject_code; /* REJECT response code */ } fw_un; u_char fw_prot; /* IPv6 protocol */ u_char fw_nports; /* N'of src ports and # of dst ports */ /* in ports array (dst ports follow */ /* src ports; max of 10 ports in all; */ /* count of 0 means match all ports) */ }; #endif /* BSD_KERNEL_PRIVATE */ #define IPV6_FW_GETNSRCP(rule) ((rule)->fw_nports & 0x0f) #define IPV6_FW_SETNSRCP(rule, n) do { \ (rule)->fw_nports &= ~0x0f; \ (rule)->fw_nports |= (n); \ } while (0) #define IPV6_FW_GETNDSTP(rule) ((rule)->fw_nports >> 4) #define IPV6_FW_SETNDSTP(rule, n) do { \ (rule)->fw_nports &= ~0xf0; \ (rule)->fw_nports |= (n) << 4;\ } while (0) #define fw_divert_port fw_un.fu_divert_port #define fw_skipto_rule fw_un.fu_skipto_rule #define fw_reject_code fw_un.fu_reject_code struct ip6_fw_chain { LIST_ENTRY(ip6_fw_chain) chain; struct ip6_fw *rule; }; /* * Values for "flags" field . */ #define IPV6_FW_F_IN 0x0001 /* Check inbound packets */ #define IPV6_FW_F_OUT 0x0002 /* Check outbound packets */ #define IPV6_FW_F_IIFACE 0x0004 /* Apply inbound interface test */ #define IPV6_FW_F_OIFACE 0x0008 /* Apply outbound interface test */ #define IPV6_FW_F_COMMAND 0x0070 /* Mask for type of chain entry: */ #define IPV6_FW_F_DENY 0x0000 /* This is a deny rule */ #define IPV6_FW_F_REJECT 0x0010 /* Deny and send a response packet */ #define IPV6_FW_F_ACCEPT 0x0020 /* This is an accept rule */ #define IPV6_FW_F_COUNT 0x0030 /* This is a count rule */ #define IPV6_FW_F_DIVERT 0x0040 /* This is a divert rule */ #define IPV6_FW_F_TEE 0x0050 /* This is a tee rule */ #define IPV6_FW_F_SKIPTO 0x0060 /* This is a skipto rule */ #define IPV6_FW_F_PRN 0x0080 /* Print if this rule matches */ #define IPV6_FW_F_SRNG 0x0100 /* The first two src ports are a min * * and max range (stored in host byte * * order). */ #define IPV6_FW_F_DRNG 0x0200 /* The first two dst ports are a min * * and max range (stored in host byte * * order). */ #define IPV6_FW_F_IIFNAME 0x0400 /* In interface by name/unit (not IP) */ #define IPV6_FW_F_OIFNAME 0x0800 /* Out interface by name/unit (not IP) */ #define IPV6_FW_F_INVSRC 0x1000 /* Invert sense of src check */ #define IPV6_FW_F_INVDST 0x2000 /* Invert sense of dst check */ #define IPV6_FW_F_FRAG 0x4000 /* Fragment */ #define IPV6_FW_F_ICMPBIT 0x8000 /* ICMP type bitmap is valid */ #define IPV6_FW_F_MASK 0xFFFF /* All possible flag bits mask */ /* * Flags for the 'fw_ipflg' field, for comparing values of ip and its protocols. */ #define IPV6_FW_IF_TCPEST 0x00000020 /* established TCP connection */ #define IPV6_FW_IF_TCPMSK 0x00000020 /* mask of all TCP values */ /* * For backwards compatibility with rules specifying "via iface" but * not restricted to only "in" or "out" packets, we define this combination * of bits to represent this configuration. */ #define IF6_FW_F_VIAHACK (IPV6_FW_F_IN|IPV6_FW_F_OUT|IPV6_FW_F_IIFACE|IPV6_FW_F_OIFACE) /* * Definitions for REJECT response codes. * Values less than 256 correspond to ICMP unreachable codes. */ #define IPV6_FW_REJECT_RST 0x0100 /* TCP packets: send RST */ /* * Definitions for IPv6 option names. */ #define IPV6_FW_IP6OPT_HOPOPT 0x01 #define IPV6_FW_IP6OPT_ROUTE 0x02 #define IPV6_FW_IP6OPT_FRAG 0x04 #define IPV6_FW_IP6OPT_ESP 0x08 #define IPV6_FW_IP6OPT_AH 0x10 #define IPV6_FW_IP6OPT_NONXT 0x20 #define IPV6_FW_IP6OPT_OPTS 0x40 /* * Definitions for TCP flags. */ #define IPV6_FW_TCPF_FIN TH_FIN #define IPV6_FW_TCPF_SYN TH_SYN #define IPV6_FW_TCPF_RST TH_RST #define IPV6_FW_TCPF_PSH TH_PUSH #define IPV6_FW_TCPF_ACK TH_ACK #define IPV6_FW_TCPF_URG TH_URG /* * Main firewall chains definitions and global var's definitions. */ #ifdef BSD_KERNEL_PRIVATE #define M_IP6FW M_IPFW /* * Function definitions. */ void ip6_fw_init(void); void load_ip6fw(void); /* Firewall hooks */ struct ip6_hdr; struct sockopt; typedef int ip6_fw_chk_t(struct ip6_hdr**, struct ifnet*, u_short *, struct mbuf**); typedef int ip6_fw_ctl_t(struct sockopt *); extern ip6_fw_chk_t *ip6_fw_chk_ptr; extern ip6_fw_ctl_t *ip6_fw_ctl_ptr; extern int ip6_fw_enable; #endif /* BSD_KERNEL_PRIVATE */ #endif /* __APPLE_API_OBSOLETE */ #endif /* _IP6_FW_H */ |