root / slirp / ip.h @ 45724d6d
History | View | Annotate | Download (7.2 kB)
| 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. Neither the name of the University nor the names of its contributors
|
| 14 |
* may be used to endorse or promote products derived from this software
|
| 15 |
* without specific prior written permission.
|
| 16 |
*
|
| 17 |
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
| 18 |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
| 19 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
| 20 |
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
| 21 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
| 22 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
| 23 |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
| 24 |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
| 25 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
| 26 |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
| 27 |
* SUCH DAMAGE.
|
| 28 |
*
|
| 29 |
* @(#)ip.h 8.1 (Berkeley) 6/10/93
|
| 30 |
* ip.h,v 1.3 1994/08/21 05:27:30 paul Exp
|
| 31 |
*/
|
| 32 |
|
| 33 |
#ifndef _IP_H_
|
| 34 |
#define _IP_H_
|
| 35 |
|
| 36 |
#ifdef HOST_WORDS_BIGENDIAN
|
| 37 |
# undef NTOHL
|
| 38 |
# undef NTOHS
|
| 39 |
# undef HTONL
|
| 40 |
# undef HTONS
|
| 41 |
# define NTOHL(d)
|
| 42 |
# define NTOHS(d)
|
| 43 |
# define HTONL(d)
|
| 44 |
# define HTONS(d)
|
| 45 |
#else
|
| 46 |
# ifndef NTOHL
|
| 47 |
# define NTOHL(d) ((d) = ntohl((d)))
|
| 48 |
# endif
|
| 49 |
# ifndef NTOHS
|
| 50 |
# define NTOHS(d) ((d) = ntohs((uint16_t)(d)))
|
| 51 |
# endif
|
| 52 |
# ifndef HTONL
|
| 53 |
# define HTONL(d) ((d) = htonl((d)))
|
| 54 |
# endif
|
| 55 |
# ifndef HTONS
|
| 56 |
# define HTONS(d) ((d) = htons((uint16_t)(d)))
|
| 57 |
# endif
|
| 58 |
#endif
|
| 59 |
|
| 60 |
typedef uint32_t n_long; /* long as received from the net */ |
| 61 |
|
| 62 |
/*
|
| 63 |
* Definitions for internet protocol version 4.
|
| 64 |
* Per RFC 791, September 1981.
|
| 65 |
*/
|
| 66 |
#define IPVERSION 4 |
| 67 |
|
| 68 |
/*
|
| 69 |
* Structure of an internet header, naked of options.
|
| 70 |
*/
|
| 71 |
struct ip {
|
| 72 |
#ifdef HOST_WORDS_BIGENDIAN
|
| 73 |
uint8_t ip_v:4, /* version */ |
| 74 |
ip_hl:4; /* header length */ |
| 75 |
#else
|
| 76 |
uint8_t ip_hl:4, /* header length */ |
| 77 |
ip_v:4; /* version */ |
| 78 |
#endif
|
| 79 |
uint8_t ip_tos; /* type of service */
|
| 80 |
uint16_t ip_len; /* total length */
|
| 81 |
uint16_t ip_id; /* identification */
|
| 82 |
uint16_t ip_off; /* fragment offset field */
|
| 83 |
#define IP_DF 0x4000 /* don't fragment flag */ |
| 84 |
#define IP_MF 0x2000 /* more fragments flag */ |
| 85 |
#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ |
| 86 |
uint8_t ip_ttl; /* time to live */
|
| 87 |
uint8_t ip_p; /* protocol */
|
| 88 |
uint16_t ip_sum; /* checksum */
|
| 89 |
struct in_addr ip_src,ip_dst; /* source and dest address */ |
| 90 |
} QEMU_PACKED; |
| 91 |
|
| 92 |
#define IP_MAXPACKET 65535 /* maximum packet size */ |
| 93 |
|
| 94 |
/*
|
| 95 |
* Definitions for IP type of service (ip_tos)
|
| 96 |
*/
|
| 97 |
#define IPTOS_LOWDELAY 0x10 |
| 98 |
#define IPTOS_THROUGHPUT 0x08 |
| 99 |
#define IPTOS_RELIABILITY 0x04 |
| 100 |
|
| 101 |
/*
|
| 102 |
* Definitions for options.
|
| 103 |
*/
|
| 104 |
#define IPOPT_COPIED(o) ((o)&0x80) |
| 105 |
#define IPOPT_CLASS(o) ((o)&0x60) |
| 106 |
#define IPOPT_NUMBER(o) ((o)&0x1f) |
| 107 |
|
| 108 |
#define IPOPT_CONTROL 0x00 |
| 109 |
#define IPOPT_RESERVED1 0x20 |
| 110 |
#define IPOPT_DEBMEAS 0x40 |
| 111 |
#define IPOPT_RESERVED2 0x60 |
| 112 |
|
| 113 |
#define IPOPT_EOL 0 /* end of option list */ |
| 114 |
#define IPOPT_NOP 1 /* no operation */ |
| 115 |
|
| 116 |
#define IPOPT_RR 7 /* record packet route */ |
| 117 |
#define IPOPT_TS 68 /* timestamp */ |
| 118 |
#define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ |
| 119 |
#define IPOPT_LSRR 131 /* loose source route */ |
| 120 |
#define IPOPT_SATID 136 /* satnet id */ |
| 121 |
#define IPOPT_SSRR 137 /* strict source route */ |
| 122 |
|
| 123 |
/*
|
| 124 |
* Offsets to fields in options other than EOL and NOP.
|
| 125 |
*/
|
| 126 |
#define IPOPT_OPTVAL 0 /* option ID */ |
| 127 |
#define IPOPT_OLEN 1 /* option length */ |
| 128 |
#define IPOPT_OFFSET 2 /* offset within option */ |
| 129 |
#define IPOPT_MINOFF 4 /* min value of above */ |
| 130 |
|
| 131 |
/*
|
| 132 |
* Time stamp option structure.
|
| 133 |
*/
|
| 134 |
struct ip_timestamp {
|
| 135 |
uint8_t ipt_code; /* IPOPT_TS */
|
| 136 |
uint8_t ipt_len; /* size of structure (variable) */
|
| 137 |
uint8_t ipt_ptr; /* index of current entry */
|
| 138 |
#ifdef HOST_WORDS_BIGENDIAN
|
| 139 |
uint8_t ipt_oflw:4, /* overflow counter */ |
| 140 |
ipt_flg:4; /* flags, see below */ |
| 141 |
#else
|
| 142 |
uint8_t ipt_flg:4, /* flags, see below */ |
| 143 |
ipt_oflw:4; /* overflow counter */ |
| 144 |
#endif
|
| 145 |
union ipt_timestamp {
|
| 146 |
n_long ipt_time[1];
|
| 147 |
struct ipt_ta {
|
| 148 |
struct in_addr ipt_addr;
|
| 149 |
n_long ipt_time; |
| 150 |
} ipt_ta[1];
|
| 151 |
} ipt_timestamp; |
| 152 |
} QEMU_PACKED; |
| 153 |
|
| 154 |
/* flag bits for ipt_flg */
|
| 155 |
#define IPOPT_TS_TSONLY 0 /* timestamps only */ |
| 156 |
#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ |
| 157 |
#define IPOPT_TS_PRESPEC 3 /* specified modules only */ |
| 158 |
|
| 159 |
/* bits for security (not byte swapped) */
|
| 160 |
#define IPOPT_SECUR_UNCLASS 0x0000 |
| 161 |
#define IPOPT_SECUR_CONFID 0xf135 |
| 162 |
#define IPOPT_SECUR_EFTO 0x789a |
| 163 |
#define IPOPT_SECUR_MMMM 0xbc4d |
| 164 |
#define IPOPT_SECUR_RESTR 0xaf13 |
| 165 |
#define IPOPT_SECUR_SECRET 0xd788 |
| 166 |
#define IPOPT_SECUR_TOPSECRET 0x6bc5 |
| 167 |
|
| 168 |
/*
|
| 169 |
* Internet implementation parameters.
|
| 170 |
*/
|
| 171 |
#define MAXTTL 255 /* maximum time to live (seconds) */ |
| 172 |
#define IPDEFTTL 64 /* default ttl, from RFC 1340 */ |
| 173 |
#define IPFRAGTTL 60 /* time to live for frags, slowhz */ |
| 174 |
#define IPTTLDEC 1 /* subtracted when forwarding */ |
| 175 |
|
| 176 |
#define IP_MSS 576 /* default maximum segment size */ |
| 177 |
|
| 178 |
#if SIZEOF_CHAR_P == 4 |
| 179 |
struct mbuf_ptr {
|
| 180 |
struct mbuf *mptr;
|
| 181 |
uint32_t dummy; |
| 182 |
} QEMU_PACKED; |
| 183 |
#else
|
| 184 |
struct mbuf_ptr {
|
| 185 |
struct mbuf *mptr;
|
| 186 |
} QEMU_PACKED; |
| 187 |
#endif
|
| 188 |
struct qlink {
|
| 189 |
void *next, *prev;
|
| 190 |
}; |
| 191 |
|
| 192 |
/*
|
| 193 |
* Overlay for ip header used by other protocols (tcp, udp).
|
| 194 |
*/
|
| 195 |
struct ipovly {
|
| 196 |
struct mbuf_ptr ih_mbuf; /* backpointer to mbuf */ |
| 197 |
uint8_t ih_x1; /* (unused) */
|
| 198 |
uint8_t ih_pr; /* protocol */
|
| 199 |
uint16_t ih_len; /* protocol length */
|
| 200 |
struct in_addr ih_src; /* source internet address */ |
| 201 |
struct in_addr ih_dst; /* destination internet address */ |
| 202 |
} QEMU_PACKED; |
| 203 |
|
| 204 |
/*
|
| 205 |
* Ip reassembly queue structure. Each fragment
|
| 206 |
* being reassembled is attached to one of these structures.
|
| 207 |
* They are timed out after ipq_ttl drops to 0, and may also
|
| 208 |
* be reclaimed if memory becomes tight.
|
| 209 |
* size 28 bytes
|
| 210 |
*/
|
| 211 |
struct ipq {
|
| 212 |
struct qlink frag_link; /* to ip headers of fragments */ |
| 213 |
struct qlink ip_link; /* to other reass headers */ |
| 214 |
uint8_t ipq_ttl; /* time for reass q to live */
|
| 215 |
uint8_t ipq_p; /* protocol of this fragment */
|
| 216 |
uint16_t ipq_id; /* sequence id for reassembly */
|
| 217 |
struct in_addr ipq_src,ipq_dst;
|
| 218 |
} QEMU_PACKED; |
| 219 |
|
| 220 |
/*
|
| 221 |
* Ip header, when holding a fragment.
|
| 222 |
*
|
| 223 |
* Note: ipf_link must be at same offset as frag_link above
|
| 224 |
*/
|
| 225 |
struct ipasfrag {
|
| 226 |
struct qlink ipf_link;
|
| 227 |
struct ip ipf_ip;
|
| 228 |
} QEMU_PACKED; |
| 229 |
|
| 230 |
#define ipf_off ipf_ip.ip_off
|
| 231 |
#define ipf_tos ipf_ip.ip_tos
|
| 232 |
#define ipf_len ipf_ip.ip_len
|
| 233 |
#define ipf_next ipf_link.next
|
| 234 |
#define ipf_prev ipf_link.prev
|
| 235 |
|
| 236 |
/*
|
| 237 |
* Structure stored in mbuf in inpcb.ip_options
|
| 238 |
* and passed to ip_output when ip options are in use.
|
| 239 |
* The actual length of the options (including ipopt_dst)
|
| 240 |
* is in m_len.
|
| 241 |
*/
|
| 242 |
#define MAX_IPOPTLEN 40 |
| 243 |
|
| 244 |
struct ipoption {
|
| 245 |
struct in_addr ipopt_dst; /* first-hop dst if source routed */ |
| 246 |
int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */
|
| 247 |
} QEMU_PACKED; |
| 248 |
|
| 249 |
#endif
|