| 1 |
/* |
| 2 |
* Copyright (c) 1982, 1986, 1993 |
| 3 |
* The Regents of the University of California. All rights reserved. |
| 4 |
* |
| 5 |
* Redistribution and use in source and binary forms, with or without |
| 6 |
* modification, are permitted provided that the following conditions |
| 7 |
* are met: |
| 8 |
* 1. Redistributions of source code must retain the above copyright |
| 9 |
* notice, this list of conditions and the following disclaimer. |
| 10 |
* 2. Redistributions in binary form must reproduce the above copyright |
| 11 |
* notice, this list of conditions and the following disclaimer in the |
| 12 |
* documentation and/or other materials provided with the distribution. |
| 13 |
* 3. All advertising materials mentioning features or use of this software |
| 14 |
* must display the following acknowledgement: |
| 15 |
* This product includes software developed by the University of |
| 16 |
* California, Berkeley and its contributors. |
| 17 |
* 4. Neither the name of the University nor the names of its contributors |
| 18 |
* may be used to endorse or promote products derived from this software |
| 19 |
* without specific prior written permission. |
| 20 |
* |
| 21 |
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 |
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 |
* SUCH DAMAGE. |
| 32 |
* |
| 33 |
* @(#)ip.h 8.1 (Berkeley) 6/10/93 |
| 34 |
* ip.h,v 1.3 1994/08/21 05:27:30 paul Exp |
| 35 |
*/ |
| 36 |
|
| 37 |
#ifndef _IP_H_ |
| 38 |
#define _IP_H_ |
| 39 |
|
| 40 |
#ifdef WORDS_BIGENDIAN |
| 41 |
# ifndef NTOHL |
| 42 |
# define NTOHL(d) |
| 43 |
# endif |
| 44 |
# ifndef NTOHS |
| 45 |
# define NTOHS(d) |
| 46 |
# endif |
| 47 |
# ifndef HTONL |
| 48 |
# define HTONL(d) |
| 49 |
# endif |
| 50 |
# ifndef HTONS |
| 51 |
# define HTONS(d) |
| 52 |
# endif |
| 53 |
#else |
| 54 |
# ifndef NTOHL |
| 55 |
# define NTOHL(d) ((d) = ntohl((d))) |
| 56 |
# endif |
| 57 |
# ifndef NTOHS |
| 58 |
# define NTOHS(d) ((d) = ntohs((u_int16_t)(d))) |
| 59 |
# endif |
| 60 |
# ifndef HTONL |
| 61 |
# define HTONL(d) ((d) = htonl((d))) |
| 62 |
# endif |
| 63 |
# ifndef HTONS |
| 64 |
# define HTONS(d) ((d) = htons((u_int16_t)(d))) |
| 65 |
# endif |
| 66 |
#endif |
| 67 |
|
| 68 |
typedef u_int32_t n_long; /* long as received from the net */ |
| 69 |
|
| 70 |
/* |
| 71 |
* Definitions for internet protocol version 4. |
| 72 |
* Per RFC 791, September 1981. |
| 73 |
*/ |
| 74 |
#define IPVERSION 4 |
| 75 |
|
| 76 |
/* |
| 77 |
* Structure of an internet header, naked of options. |
| 78 |
* |
| 79 |
* We declare ip_len and ip_off to be short, rather than u_short |
| 80 |
* pragmatically since otherwise unsigned comparisons can result |
| 81 |
* against negative integers quite easily, and fail in subtle ways. |
| 82 |
*/ |
| 83 |
#ifdef PRAGMA_PACK_SUPPORTED |
| 84 |
#pragma pack(1) |
| 85 |
#endif |
| 86 |
|
| 87 |
struct ip { |
| 88 |
#ifdef WORDS_BIGENDIAN |
| 89 |
u_int ip_v:4, /* version */ |
| 90 |
ip_hl:4; /* header length */ |
| 91 |
#else |
| 92 |
u_int ip_hl:4, /* header length */ |
| 93 |
ip_v:4; /* version */ |
| 94 |
#endif |
| 95 |
u_int8_t ip_tos; /* type of service */ |
| 96 |
int16_t ip_len; /* total length */ |
| 97 |
u_int16_t ip_id; /* identification */ |
| 98 |
int16_t ip_off; /* fragment offset field */ |
| 99 |
#define IP_DF 0x4000 /* don't fragment flag */ |
| 100 |
#define IP_MF 0x2000 /* more fragments flag */ |
| 101 |
#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ |
| 102 |
u_int8_t ip_ttl; /* time to live */ |
| 103 |
u_int8_t ip_p; /* protocol */ |
| 104 |
u_int16_t ip_sum; /* checksum */ |
| 105 |
struct in_addr ip_src,ip_dst; /* source and dest address */ |
| 106 |
} PACKED__; |
| 107 |
|
| 108 |
#ifdef PRAGMA_PACK_SUPPORTED |
| 109 |
#pragma pack(0) |
| 110 |
#endif |
| 111 |
|
| 112 |
#define IP_MAXPACKET 65535 /* maximum packet size */ |
| 113 |
|
| 114 |
/* |
| 115 |
* Definitions for IP type of service (ip_tos) |
| 116 |
*/ |
| 117 |
#define IPTOS_LOWDELAY 0x10 |
| 118 |
#define IPTOS_THROUGHPUT 0x08 |
| 119 |
#define IPTOS_RELIABILITY 0x04 |
| 120 |
|
| 121 |
/* |
| 122 |
* Definitions for options. |
| 123 |
*/ |
| 124 |
#define IPOPT_COPIED(o) ((o)&0x80) |
| 125 |
#define IPOPT_CLASS(o) ((o)&0x60) |
| 126 |
#define IPOPT_NUMBER(o) ((o)&0x1f) |
| 127 |
|
| 128 |
#define IPOPT_CONTROL 0x00 |
| 129 |
#define IPOPT_RESERVED1 0x20 |
| 130 |
#define IPOPT_DEBMEAS 0x40 |
| 131 |
#define IPOPT_RESERVED2 0x60 |
| 132 |
|
| 133 |
#define IPOPT_EOL 0 /* end of option list */ |
| 134 |
#define IPOPT_NOP 1 /* no operation */ |
| 135 |
|
| 136 |
#define IPOPT_RR 7 /* record packet route */ |
| 137 |
#define IPOPT_TS 68 /* timestamp */ |
| 138 |
#define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ |
| 139 |
#define IPOPT_LSRR 131 /* loose source route */ |
| 140 |
#define IPOPT_SATID 136 /* satnet id */ |
| 141 |
#define IPOPT_SSRR 137 /* strict source route */ |
| 142 |
|
| 143 |
/* |
| 144 |
* Offsets to fields in options other than EOL and NOP. |
| 145 |
*/ |
| 146 |
#define IPOPT_OPTVAL 0 /* option ID */ |
| 147 |
#define IPOPT_OLEN 1 /* option length */ |
| 148 |
#define IPOPT_OFFSET 2 /* offset within option */ |
| 149 |
#define IPOPT_MINOFF 4 /* min value of above */ |
| 150 |
|
| 151 |
/* |
| 152 |
* Time stamp option structure. |
| 153 |
*/ |
| 154 |
#ifdef PRAGMA_PACK_SUPPORTED |
| 155 |
#pragma pack(1) |
| 156 |
#endif |
| 157 |
|
| 158 |
struct ip_timestamp { |
| 159 |
u_int8_t ipt_code; /* IPOPT_TS */ |
| 160 |
u_int8_t ipt_len; /* size of structure (variable) */ |
| 161 |
u_int8_t ipt_ptr; /* index of current entry */ |
| 162 |
#ifdef WORDS_BIGENDIAN |
| 163 |
u_int ipt_oflw:4, /* overflow counter */ |
| 164 |
ipt_flg:4; /* flags, see below */ |
| 165 |
#else |
| 166 |
u_int ipt_flg:4, /* flags, see below */ |
| 167 |
ipt_oflw:4; /* overflow counter */ |
| 168 |
#endif |
| 169 |
union ipt_timestamp { |
| 170 |
n_long ipt_time[1]; |
| 171 |
struct ipt_ta { |
| 172 |
struct in_addr ipt_addr; |
| 173 |
n_long ipt_time; |
| 174 |
} ipt_ta[1]; |
| 175 |
} ipt_timestamp; |
| 176 |
} PACKED__; |
| 177 |
|
| 178 |
#ifdef PRAGMA_PACK_SUPPORTED |
| 179 |
#pragma pack(0) |
| 180 |
#endif |
| 181 |
|
| 182 |
/* flag bits for ipt_flg */ |
| 183 |
#define IPOPT_TS_TSONLY 0 /* timestamps only */ |
| 184 |
#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ |
| 185 |
#define IPOPT_TS_PRESPEC 3 /* specified modules only */ |
| 186 |
|
| 187 |
/* bits for security (not byte swapped) */ |
| 188 |
#define IPOPT_SECUR_UNCLASS 0x0000 |
| 189 |
#define IPOPT_SECUR_CONFID 0xf135 |
| 190 |
#define IPOPT_SECUR_EFTO 0x789a |
| 191 |
#define IPOPT_SECUR_MMMM 0xbc4d |
| 192 |
#define IPOPT_SECUR_RESTR 0xaf13 |
| 193 |
#define IPOPT_SECUR_SECRET 0xd788 |
| 194 |
#define IPOPT_SECUR_TOPSECRET 0x6bc5 |
| 195 |
|
| 196 |
/* |
| 197 |
* Internet implementation parameters. |
| 198 |
*/ |
| 199 |
#define MAXTTL 255 /* maximum time to live (seconds) */ |
| 200 |
#define IPDEFTTL 64 /* default ttl, from RFC 1340 */ |
| 201 |
#define IPFRAGTTL 60 /* time to live for frags, slowhz */ |
| 202 |
#define IPTTLDEC 1 /* subtracted when forwarding */ |
| 203 |
|
| 204 |
#define IP_MSS 576 /* default maximum segment size */ |
| 205 |
|
| 206 |
#ifdef HAVE_SYS_TYPES32_H /* Overcome some Solaris 2.x junk */ |
| 207 |
#include <sys/types32.h> |
| 208 |
#else |
| 209 |
#if SIZEOF_CHAR_P == 4 |
| 210 |
typedef caddr_t caddr32_t; |
| 211 |
#else |
| 212 |
typedef u_int32_t caddr32_t; |
| 213 |
#endif |
| 214 |
#endif |
| 215 |
|
| 216 |
#if SIZEOF_CHAR_P == 4 |
| 217 |
typedef struct ipq *ipqp_32; |
| 218 |
typedef struct ipasfrag *ipasfragp_32; |
| 219 |
#else |
| 220 |
typedef caddr32_t ipqp_32; |
| 221 |
typedef caddr32_t ipasfragp_32; |
| 222 |
#endif |
| 223 |
|
| 224 |
/* |
| 225 |
* Overlay for ip header used by other protocols (tcp, udp). |
| 226 |
*/ |
| 227 |
#ifdef PRAGMA_PACK_SUPPORTED |
| 228 |
#pragma pack(1) |
| 229 |
#endif |
| 230 |
|
| 231 |
struct ipovly { |
| 232 |
caddr32_t ih_next, ih_prev; /* for protocol sequence q's */ |
| 233 |
u_int8_t ih_x1; /* (unused) */ |
| 234 |
u_int8_t ih_pr; /* protocol */ |
| 235 |
int16_t ih_len; /* protocol length */ |
| 236 |
struct in_addr ih_src; /* source internet address */ |
| 237 |
struct in_addr ih_dst; /* destination internet address */ |
| 238 |
} PACKED__; |
| 239 |
|
| 240 |
#ifdef PRAGMA_PACK_SUPPORTED |
| 241 |
#pragma pack(0) |
| 242 |
#endif |
| 243 |
|
| 244 |
/* |
| 245 |
* Ip reassembly queue structure. Each fragment |
| 246 |
* being reassembled is attached to one of these structures. |
| 247 |
* They are timed out after ipq_ttl drops to 0, and may also |
| 248 |
* be reclaimed if memory becomes tight. |
| 249 |
* size 28 bytes |
| 250 |
*/ |
| 251 |
struct ipq { |
| 252 |
ipqp_32 next,prev; /* to other reass headers */ |
| 253 |
u_int8_t ipq_ttl; /* time for reass q to live */ |
| 254 |
u_int8_t ipq_p; /* protocol of this fragment */ |
| 255 |
u_int16_t ipq_id; /* sequence id for reassembly */ |
| 256 |
ipasfragp_32 ipq_next,ipq_prev; |
| 257 |
/* to ip headers of fragments */ |
| 258 |
struct in_addr ipq_src,ipq_dst; |
| 259 |
}; |
| 260 |
|
| 261 |
/* |
| 262 |
* Ip header, when holding a fragment. |
| 263 |
* |
| 264 |
* Note: ipf_next must be at same offset as ipq_next above |
| 265 |
*/ |
| 266 |
struct ipasfrag { |
| 267 |
#ifdef WORDS_BIGENDIAN |
| 268 |
u_int ip_v:4, |
| 269 |
ip_hl:4; |
| 270 |
#else |
| 271 |
u_int ip_hl:4, |
| 272 |
ip_v:4; |
| 273 |
#endif |
| 274 |
/* BUG : u_int changed to u_int8_t. |
| 275 |
* sizeof(u_int)==4 on linux 2.0 |
| 276 |
*/ |
| 277 |
u_int8_t ipf_mff; /* XXX overlays ip_tos: use low bit |
| 278 |
* to avoid destroying tos (PPPDTRuu); |
| 279 |
* copied from (ip_off&IP_MF) */ |
| 280 |
int16_t ip_len; |
| 281 |
u_int16_t ip_id; |
| 282 |
int16_t ip_off; |
| 283 |
u_int8_t ip_ttl; |
| 284 |
u_int8_t ip_p; |
| 285 |
u_int16_t ip_sum; |
| 286 |
ipasfragp_32 ipf_next; /* next fragment */ |
| 287 |
ipasfragp_32 ipf_prev; /* previous fragment */ |
| 288 |
}; |
| 289 |
|
| 290 |
/* |
| 291 |
* Structure stored in mbuf in inpcb.ip_options |
| 292 |
* and passed to ip_output when ip options are in use. |
| 293 |
* The actual length of the options (including ipopt_dst) |
| 294 |
* is in m_len. |
| 295 |
*/ |
| 296 |
#define MAX_IPOPTLEN 40 |
| 297 |
|
| 298 |
struct ipoption { |
| 299 |
struct in_addr ipopt_dst; /* first-hop dst if source routed */ |
| 300 |
int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */ |
| 301 |
}; |
| 302 |
|
| 303 |
/* |
| 304 |
* Structure attached to inpcb.ip_moptions and |
| 305 |
* passed to ip_output when IP multicast options are in use. |
| 306 |
*/ |
| 307 |
|
| 308 |
struct ipstat { |
| 309 |
u_long ips_total; /* total packets received */ |
| 310 |
u_long ips_badsum; /* checksum bad */ |
| 311 |
u_long ips_tooshort; /* packet too short */ |
| 312 |
u_long ips_toosmall; /* not enough data */ |
| 313 |
u_long ips_badhlen; /* ip header length < data size */ |
| 314 |
u_long ips_badlen; /* ip length < ip header length */ |
| 315 |
u_long ips_fragments; /* fragments received */ |
| 316 |
u_long ips_fragdropped; /* frags dropped (dups, out of space) */ |
| 317 |
u_long ips_fragtimeout; /* fragments timed out */ |
| 318 |
u_long ips_forward; /* packets forwarded */ |
| 319 |
u_long ips_cantforward; /* packets rcvd for unreachable dest */ |
| 320 |
u_long ips_redirectsent; /* packets forwarded on same net */ |
| 321 |
u_long ips_noproto; /* unknown or unsupported protocol */ |
| 322 |
u_long ips_delivered; /* datagrams delivered to upper level*/ |
| 323 |
u_long ips_localout; /* total ip packets generated here */ |
| 324 |
u_long ips_odropped; /* lost packets due to nobufs, etc. */ |
| 325 |
u_long ips_reassembled; /* total packets reassembled ok */ |
| 326 |
u_long ips_fragmented; /* datagrams successfully fragmented */ |
| 327 |
u_long ips_ofragments; /* output fragments created */ |
| 328 |
u_long ips_cantfrag; /* don't fragment flag was set, etc. */ |
| 329 |
u_long ips_badoptions; /* error in option processing */ |
| 330 |
u_long ips_noroute; /* packets discarded due to no route */ |
| 331 |
u_long ips_badvers; /* ip version != 4 */ |
| 332 |
u_long ips_rawout; /* total raw ip packets generated */ |
| 333 |
u_long ips_unaligned; /* times the ip packet was not aligned */ |
| 334 |
}; |
| 335 |
|
| 336 |
extern struct ipstat ipstat; |
| 337 |
extern struct ipq ipq; /* ip reass. queue */ |
| 338 |
extern u_int16_t ip_id; /* ip packet ctr, for ids */ |
| 339 |
extern int ip_defttl; /* default IP ttl */ |
| 340 |
|
| 341 |
#endif |
