00001 /* 00002 * Copyright (c) 1982, 1986, 1993 00003 * The Regents of the University of California. All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. All advertising materials mentioning features or use of this software 00014 * must display the following acknowledgement: 00015 * This product includes software developed by the University of 00016 * California, Berkeley and its contributors. 00017 * 4. Neither the name of the University nor the names of its contributors 00018 * may be used to endorse or promote products derived from this software 00019 * without specific prior written permission. 00020 * 00021 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 00022 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00023 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00024 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 00025 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00026 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00027 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00028 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00029 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00030 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00031 * SUCH DAMAGE. 00032 * 00033 * @(#)ip.h 8.2 (Berkeley) 6/1/94 00034 */ 00035 #ifndef WIN32 00036 #include <endian.h> 00037 #else 00038 #include <winsock2.h> 00039 #ifndef LITTLE_ENDIAN 00040 #define LITTLE_ENDIAN 1234 00041 #define BIG_ENDIAN 4321 00042 #define BYTE_ORDER LITTLE_ENDIAN 00043 #endif 00044 #endif 00045 00046 /* 00047 * Definitions for internet protocol version 4. 00048 * Per RFC 791, September 1981. 00049 */ 00050 #define IPVERSION 4 00051 00052 /* 00053 * Structure of an internet header, naked of options. 00054 * 00055 * We declare ip_len and ip_off to be short, rather than u_short 00056 * pragmatically since otherwise unsigned comparisons can result 00057 * against negative integers quite easily, and fail in subtle ways. 00058 */ 00059 struct ip { 00060 #if BYTE_ORDER == LITTLE_ENDIAN 00061 u_char ip_hl:4, /* header length */ 00062 ip_v:4; /* version */ 00063 #endif 00064 #if BYTE_ORDER == BIG_ENDIAN 00065 u_char ip_v:4, /* version */ 00066 ip_hl:4; /* header length */ 00067 #endif 00068 u_char ip_tos; /* type of service */ 00069 short ip_len; /* total length */ 00070 u_short ip_id; /* identification */ 00071 short ip_off; /* fragment offset field */ 00072 #define IP_DF 0x4000 /* dont fragment flag */ 00073 #define IP_MF 0x2000 /* more fragments flag */ 00074 #define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ 00075 u_char ip_ttl; /* time to live */ 00076 u_char ip_p; /* protocol */ 00077 u_short ip_sum; /* checksum */ 00078 struct in_addr ip_src,ip_dst; /* source and dest address */ 00079 }; 00080 00081 #define IP_MAXPACKET 65535 /* maximum packet size */ 00082 00083 /* 00084 * Definitions for IP type of service (ip_tos) 00085 */ 00086 #define IPTOS_LOWDELAY 0x10 00087 #define IPTOS_THROUGHPUT 0x08 00088 #define IPTOS_RELIABILITY 0x04 00089 00090 /* 00091 * Definitions for IP precedence (also in ip_tos) (hopefully unused) 00092 */ 00093 #define IPTOS_PREC_NETCONTROL 0xe0 00094 #define IPTOS_PREC_INTERNETCONTROL 0xc0 00095 #define IPTOS_PREC_CRITIC_ECP 0xa0 00096 #define IPTOS_PREC_FLASHOVERRIDE 0x80 00097 #define IPTOS_PREC_FLASH 0x60 00098 #define IPTOS_PREC_IMMEDIATE 0x40 00099 #define IPTOS_PREC_PRIORITY 0x20 00100 #define IPTOS_PREC_ROUTINE 0x00 00101 00102 /* 00103 * Definitions for options. 00104 */ 00105 #define IPOPT_COPIED(o) ((o)&0x80) 00106 #define IPOPT_CLASS(o) ((o)&0x60) 00107 #define IPOPT_NUMBER(o) ((o)&0x1f) 00108 00109 #define IPOPT_CONTROL 0x00 00110 #define IPOPT_RESERVED1 0x20 00111 #define IPOPT_DEBMEAS 0x40 00112 #define IPOPT_RESERVED2 0x60 00113 00114 #define IPOPT_EOL 0 /* end of option list */ 00115 #define IPOPT_NOP 1 /* no operation */ 00116 00117 #define IPOPT_RR 7 /* record packet route */ 00118 #define IPOPT_TS 68 /* timestamp */ 00119 #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ 00120 #define IPOPT_LSRR 131 /* loose source route */ 00121 #define IPOPT_SATID 136 /* satnet id */ 00122 #define IPOPT_SSRR 137 /* strict source route */ 00123 00124 /* 00125 * Offsets to fields in options other than EOL and NOP. 00126 */ 00127 #define IPOPT_OPTVAL 0 /* option ID */ 00128 #define IPOPT_OLEN 1 /* option length */ 00129 #define IPOPT_OFFSET 2 /* offset within option */ 00130 #define IPOPT_MINOFF 4 /* min value of above */ 00131 00132 /* 00133 * Time stamp option structure. 00134 */ 00135 struct ip_timestamp { 00136 u_char ipt_code; /* IPOPT_TS */ 00137 u_char ipt_len; /* size of structure (variable) */ 00138 u_char ipt_ptr; /* index of current entry */ 00139 #if BYTE_ORDER == LITTLE_ENDIAN 00140 u_char ipt_flg:4, /* flags, see below */ 00141 ipt_oflw:4; /* overflow counter */ 00142 #endif 00143 #if BYTE_ORDER == BIG_ENDIAN 00144 u_char ipt_oflw:4, /* overflow counter */ 00145 ipt_flg:4; /* flags, see below */ 00146 #endif 00147 union ipt_timestamp { 00148 n_long ipt_time[1]; 00149 struct ipt_ta { 00150 struct in_addr ipt_addr; 00151 n_long ipt_time; 00152 } ipt_ta[1]; 00153 } ipt_timestamp; 00154 }; 00155 00156 /* flag bits for ipt_flg */ 00157 #define IPOPT_TS_TSONLY 0 /* timestamps only */ 00158 #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ 00159 #define IPOPT_TS_PRESPEC 3 /* specified modules only */ 00160 00161 /* bits for security (not byte swapped) */ 00162 #define IPOPT_SECUR_UNCLASS 0x0000 00163 #define IPOPT_SECUR_CONFID 0xf135 00164 #define IPOPT_SECUR_EFTO 0x789a 00165 #define IPOPT_SECUR_MMMM 0xbc4d 00166 #define IPOPT_SECUR_RESTR 0xaf13 00167 #define IPOPT_SECUR_SECRET 0xd788 00168 #define IPOPT_SECUR_TOPSECRET 0x6bc5 00169 00170 /* 00171 * Internet implementation parameters. 00172 */ 00173 #define MAXTTL 255 /* maximum time to live (seconds) */ 00174 #define IPDEFTTL 64 /* default ttl, from RFC 1340 */ 00175 #define IPFRAGTTL 60 /* time to live for frags, slowhz */ 00176 #define IPTTLDEC 1 /* subtracted when forwarding */ 00177 00178 #define IP_MSS 576 /* default maximum segment size */
1.4.2