| 1 | /* |
| 2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
| 3 | * operating system. INET is implemented using the BSD Socket |
| 4 | * interface as the means of communication with the user level. |
| 5 | * |
| 6 | * Definitions of the Internet Protocol. |
| 7 | * |
| 8 | * Version: @(#)in.h 1.0.1 04/21/93 |
| 9 | * |
| 10 | * Authors: Original taken from the GNU Project <netinet/in.h> file. |
| 11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or |
| 14 | * modify it under the terms of the GNU General Public License |
| 15 | * as published by the Free Software Foundation; either version |
| 16 | * 2 of the License, or (at your option) any later version. |
| 17 | */ |
| 18 | #ifndef _LINUX_IN_H |
| 19 | #define _LINUX_IN_H |
| 20 | |
| 21 | #include <linux/types.h> |
| 22 | #include <linux/socket.h> |
| 23 | |
| 24 | /* Standard well-defined IP protocols. */ |
| 25 | enum { |
| 26 | IPPROTO_IP = 0, /* Dummy protocol for TCP */ |
| 27 | IPPROTO_ICMP = 1, /* Internet Control Message Protocol */ |
| 28 | IPPROTO_IGMP = 2, /* Internet Group Management Protocol */ |
| 29 | IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */ |
| 30 | IPPROTO_TCP = 6, /* Transmission Control Protocol */ |
| 31 | IPPROTO_EGP = 8, /* Exterior Gateway Protocol */ |
| 32 | IPPROTO_PUP = 12, /* PUP protocol */ |
| 33 | IPPROTO_UDP = 17, /* User Datagram Protocol */ |
| 34 | IPPROTO_IDP = 22, /* XNS IDP protocol */ |
| 35 | IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */ |
| 36 | IPPROTO_RSVP = 46, /* RSVP protocol */ |
| 37 | IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */ |
| 38 | |
| 39 | IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */ |
| 40 | |
| 41 | IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */ |
| 42 | IPPROTO_AH = 51, /* Authentication Header protocol */ |
| 43 | IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET */ |
| 44 | IPPROTO_PIM = 103, /* Protocol Independent Multicast */ |
| 45 | |
| 46 | IPPROTO_COMP = 108, /* Compression Header protocol */ |
| 47 | IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */ |
| 48 | IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */ |
| 49 | |
| 50 | IPPROTO_RAW = 255, /* Raw IP packets */ |
| 51 | IPPROTO_MAX |
| 52 | }; |
| 53 | |
| 54 | |
| 55 | /* Internet address. */ |
| 56 | struct in_addr { |
| 57 | __be32 s_addr; |
| 58 | }; |
| 59 | |
| 60 | #define IP_TOS 1 |
| 61 | #define IP_TTL 2 |
| 62 | #define IP_HDRINCL 3 |
| 63 | #define IP_OPTIONS 4 |
| 64 | #define IP_ROUTER_ALERT 5 |
| 65 | #define IP_RECVOPTS 6 |
| 66 | #define IP_RETOPTS 7 |
| 67 | #define IP_PKTINFO 8 |
| 68 | #define IP_PKTOPTIONS 9 |
| 69 | #define IP_MTU_DISCOVER 10 |
| 70 | #define IP_RECVERR 11 |
| 71 | #define IP_RECVTTL 12 |
| 72 | #define IP_RECVTOS 13 |
| 73 | #define IP_MTU 14 |
| 74 | #define IP_FREEBIND 15 |
| 75 | #define IP_IPSEC_POLICY 16 |
| 76 | #define IP_XFRM_POLICY 17 |
| 77 | #define IP_PASSSEC 18 |
| 78 | #define IP_TRANSPARENT 19 |
| 79 | |
| 80 | /* BSD compatibility */ |
| 81 | #define IP_RECVRETOPTS IP_RETOPTS |
| 82 | |
| 83 | /* TProxy original addresses */ |
| 84 | #define IP_ORIGDSTADDR 20 |
| 85 | #define IP_RECVORIGDSTADDR IP_ORIGDSTADDR |
| 86 | |
| 87 | #define IP_MINTTL 21 |
| 88 | #define IP_NODEFRAG 22 |
| 89 | |
| 90 | /* IP_MTU_DISCOVER values */ |
| 91 | #define IP_PMTUDISC_DONT 0 /* Never send DF frames */ |
| 92 | #define IP_PMTUDISC_WANT 1 /* Use per route hints */ |
| 93 | #define IP_PMTUDISC_DO 2 /* Always DF */ |
| 94 | #define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */ |
| 95 | |
| 96 | #define IP_MULTICAST_IF 32 |
| 97 | #define IP_MULTICAST_TTL 33 |
| 98 | #define IP_MULTICAST_LOOP 34 |
| 99 | #define IP_ADD_MEMBERSHIP 35 |
| 100 | #define IP_DROP_MEMBERSHIP 36 |
| 101 | #define IP_UNBLOCK_SOURCE 37 |
| 102 | #define IP_BLOCK_SOURCE 38 |
| 103 | #define IP_ADD_SOURCE_MEMBERSHIP 39 |
| 104 | #define IP_DROP_SOURCE_MEMBERSHIP 40 |
| 105 | #define IP_MSFILTER 41 |
| 106 | #define MCAST_JOIN_GROUP 42 |
| 107 | #define MCAST_BLOCK_SOURCE 43 |
| 108 | #define MCAST_UNBLOCK_SOURCE 44 |
| 109 | #define MCAST_LEAVE_GROUP 45 |
| 110 | #define MCAST_JOIN_SOURCE_GROUP 46 |
| 111 | #define MCAST_LEAVE_SOURCE_GROUP 47 |
| 112 | #define MCAST_MSFILTER 48 |
| 113 | #define IP_MULTICAST_ALL 49 |
| 114 | |
| 115 | #define MCAST_EXCLUDE 0 |
| 116 | #define MCAST_INCLUDE 1 |
| 117 | |
| 118 | /* These need to appear somewhere around here */ |
| 119 | #define IP_DEFAULT_MULTICAST_TTL 1 |
| 120 | #define IP_DEFAULT_MULTICAST_LOOP 1 |
| 121 | |
| 122 | /* Request struct for multicast socket ops */ |
| 123 | |
| 124 | struct ip_mreq { |
| 125 | struct in_addr imr_multiaddr; /* IP multicast address of group */ |
| 126 | struct in_addr imr_interface; /* local IP address of interface */ |
| 127 | }; |
| 128 | |
| 129 | struct ip_mreqn { |
| 130 | struct in_addr imr_multiaddr; /* IP multicast address of group */ |
| 131 | struct in_addr imr_address; /* local IP address of interface */ |
| 132 | int imr_ifindex; /* Interface index */ |
| 133 | }; |
| 134 | |
| 135 | struct ip_mreq_source { |
| 136 | __be32 imr_multiaddr; |
| 137 | __be32 imr_interface; |
| 138 | __be32 imr_sourceaddr; |
| 139 | }; |
| 140 | |
| 141 | struct ip_msfilter { |
| 142 | __be32 imsf_multiaddr; |
| 143 | __be32 imsf_interface; |
| 144 | __u32 imsf_fmode; |
| 145 | __u32 imsf_numsrc; |
| 146 | __be32 imsf_slist[1]; |
| 147 | }; |
| 148 | |
| 149 | #define IP_MSFILTER_SIZE(numsrc) \ |
| 150 | (sizeof(struct ip_msfilter) - sizeof(__u32) \ |
| 151 | + (numsrc) * sizeof(__u32)) |
| 152 | |
| 153 | struct group_req { |
| 154 | __u32 gr_interface; /* interface index */ |
| 155 | struct __kernel_sockaddr_storage gr_group; /* group address */ |
| 156 | }; |
| 157 | |
| 158 | struct group_source_req { |
| 159 | __u32 gsr_interface; /* interface index */ |
| 160 | struct __kernel_sockaddr_storage gsr_group; /* group address */ |
| 161 | struct __kernel_sockaddr_storage gsr_source; /* source address */ |
| 162 | }; |
| 163 | |
| 164 | struct group_filter { |
| 165 | __u32 gf_interface; /* interface index */ |
| 166 | struct __kernel_sockaddr_storage gf_group; /* multicast address */ |
| 167 | __u32 gf_fmode; /* filter mode */ |
| 168 | __u32 gf_numsrc; /* number of sources */ |
| 169 | struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */ |
| 170 | }; |
| 171 | |
| 172 | #define GROUP_FILTER_SIZE(numsrc) \ |
| 173 | (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \ |
| 174 | + (numsrc) * sizeof(struct __kernel_sockaddr_storage)) |
| 175 | |
| 176 | struct in_pktinfo { |
| 177 | int ipi_ifindex; |
| 178 | struct in_addr ipi_spec_dst; |
| 179 | struct in_addr ipi_addr; |
| 180 | }; |
| 181 | |
| 182 | /* Structure describing an Internet (IP) socket address. */ |
| 183 | #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */ |
| 184 | struct sockaddr_in { |
| 185 | sa_family_t sin_family; /* Address family */ |
| 186 | __be16 sin_port; /* Port number */ |
| 187 | struct in_addr sin_addr; /* Internet address */ |
| 188 | |
| 189 | /* Pad to size of `struct sockaddr'. */ |
| 190 | unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) - |
| 191 | sizeof(unsigned short int) - sizeof(struct in_addr)]; |
| 192 | }; |
| 193 | #define sin_zero __pad /* for BSD UNIX comp. -FvK */ |
| 194 | |
| 195 | |
| 196 | /* |
| 197 | * Definitions of the bits in an Internet address integer. |
| 198 | * On subnets, host and network parts are found according |
| 199 | * to the subnet mask, not these masks. |
| 200 | */ |
| 201 | #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0) |
| 202 | #define IN_CLASSA_NET 0xff000000 |
| 203 | #define IN_CLASSA_NSHIFT 24 |
| 204 | #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET) |
| 205 | #define IN_CLASSA_MAX 128 |
| 206 | |
| 207 | #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000) |
| 208 | #define IN_CLASSB_NET 0xffff0000 |
| 209 | #define IN_CLASSB_NSHIFT 16 |
| 210 | #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET) |
| 211 | #define IN_CLASSB_MAX 65536 |
| 212 | |
| 213 | #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000) |
| 214 | #define IN_CLASSC_NET 0xffffff00 |
| 215 | #define IN_CLASSC_NSHIFT 8 |
| 216 | #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET) |
| 217 | |
| 218 | #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000) |
| 219 | #define IN_MULTICAST(a) IN_CLASSD(a) |
| 220 | #define IN_MULTICAST_NET 0xF0000000 |
| 221 | |
| 222 | #define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) |
| 223 | #define IN_BADCLASS(a) IN_EXPERIMENTAL((a)) |
| 224 | |
| 225 | /* Address to accept any incoming messages. */ |
| 226 | #define INADDR_ANY ((unsigned long int) 0x00000000) |
| 227 | |
| 228 | /* Address to send to all hosts. */ |
| 229 | #define INADDR_BROADCAST ((unsigned long int) 0xffffffff) |
| 230 | |
| 231 | /* Address indicating an error return. */ |
| 232 | #define INADDR_NONE ((unsigned long int) 0xffffffff) |
| 233 | |
| 234 | /* Network number for local host loopback. */ |
| 235 | #define IN_LOOPBACKNET 127 |
| 236 | |
| 237 | /* Address to loopback in software to local host. */ |
| 238 | #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */ |
| 239 | #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000) |
| 240 | |
| 241 | /* Defines for Multicast INADDR */ |
| 242 | #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */ |
| 243 | #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */ |
| 244 | #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */ |
| 245 | #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */ |
| 246 | |
| 247 | |
| 248 | /* <asm/byteorder.h> contains the htonl type stuff.. */ |
| 249 | #include <asm/byteorder.h> |
| 250 | |
| 251 | #ifdef __KERNEL__ |
| 252 | |
| 253 | #include <linux/errno.h> |
| 254 | |
| 255 | static inline int proto_ports_offset(int proto) |
| 256 | { |
| 257 | switch (proto) { |
| 258 | case IPPROTO_TCP: |
| 259 | case IPPROTO_UDP: |
| 260 | case IPPROTO_DCCP: |
| 261 | case IPPROTO_ESP: /* SPI */ |
| 262 | case IPPROTO_SCTP: |
| 263 | case IPPROTO_UDPLITE: |
| 264 | return 0; |
| 265 | case IPPROTO_AH: /* SPI */ |
| 266 | return 4; |
| 267 | default: |
| 268 | return -EINVAL; |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | static inline bool ipv4_is_loopback(__be32 addr) |
| 273 | { |
| 274 | return (addr & htonl(0xff000000)) == htonl(0x7f000000); |
| 275 | } |
| 276 | |
| 277 | static inline bool ipv4_is_multicast(__be32 addr) |
| 278 | { |
| 279 | return (addr & htonl(0xf0000000)) == htonl(0xe0000000); |
| 280 | } |
| 281 | |
| 282 | static inline bool ipv4_is_local_multicast(__be32 addr) |
| 283 | { |
| 284 | return (addr & htonl(0xffffff00)) == htonl(0xe0000000); |
| 285 | } |
| 286 | |
| 287 | static inline bool ipv4_is_lbcast(__be32 addr) |
| 288 | { |
| 289 | /* limited broadcast */ |
| 290 | return addr == htonl(INADDR_BROADCAST); |
| 291 | } |
| 292 | |
| 293 | static inline bool ipv4_is_zeronet(__be32 addr) |
| 294 | { |
| 295 | return (addr & htonl(0xff000000)) == htonl(0x00000000); |
| 296 | } |
| 297 | |
| 298 | /* Special-Use IPv4 Addresses (RFC3330) */ |
| 299 | |
| 300 | static inline bool ipv4_is_private_10(__be32 addr) |
| 301 | { |
| 302 | return (addr & htonl(0xff000000)) == htonl(0x0a000000); |
| 303 | } |
| 304 | |
| 305 | static inline bool ipv4_is_private_172(__be32 addr) |
| 306 | { |
| 307 | return (addr & htonl(0xfff00000)) == htonl(0xac100000); |
| 308 | } |
| 309 | |
| 310 | static inline bool ipv4_is_private_192(__be32 addr) |
| 311 | { |
| 312 | return (addr & htonl(0xffff0000)) == htonl(0xc0a80000); |
| 313 | } |
| 314 | |
| 315 | static inline bool ipv4_is_linklocal_169(__be32 addr) |
| 316 | { |
| 317 | return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000); |
| 318 | } |
| 319 | |
| 320 | static inline bool ipv4_is_anycast_6to4(__be32 addr) |
| 321 | { |
| 322 | return (addr & htonl(0xffffff00)) == htonl(0xc0586300); |
| 323 | } |
| 324 | |
| 325 | static inline bool ipv4_is_test_192(__be32 addr) |
| 326 | { |
| 327 | return (addr & htonl(0xffffff00)) == htonl(0xc0000200); |
| 328 | } |
| 329 | |
| 330 | static inline bool ipv4_is_test_198(__be32 addr) |
| 331 | { |
| 332 | return (addr & htonl(0xfffe0000)) == htonl(0xc6120000); |
| 333 | } |
| 334 | #endif |
| 335 | |
| 336 | #endif /* _LINUX_IN_H */ |