1 /* 2 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* 7 * Copyright (c) 1982, 1986 Regents of the University of California. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms are permitted 11 * provided that this notice is preserved and that due credit is given 12 * to the University of California at Berkeley. The name of the University 13 * may not be used to endorse or promote products derived from this 14 * software without specific prior written permission. This software 15 * is provided ``as is'' without express or implied warranty. 16 */ 17 18 /* 19 * Definitions for internet protocol version 4. 20 * Per RFC 791, September 1981. 21 */ 22 23 #ifndef _NETINET_IP_H 24 #define _NETINET_IP_H 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 /* ip.h 1.13 88/08/19 SMI; from UCB 7.6.1.1 3/15/88 */ 28 29 #include <sys/isa_defs.h> 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 #define IPVERSION 4 36 37 /* 38 * Structure of an internet header, naked of options. 39 */ 40 struct ip { 41 #ifdef _BIT_FIELDS_LTOH 42 uchar_t ip_hl:4, /* header length */ 43 ip_v:4; /* version */ 44 #else 45 uchar_t ip_v:4, /* version */ 46 ip_hl:4; /* header length */ 47 #endif 48 uchar_t ip_tos; /* type of service */ 49 ushort_t ip_len; /* total length */ 50 ushort_t ip_id; /* identification */ 51 ushort_t ip_off; /* fragment offset field */ 52 #define IP_DF 0x4000 /* dont fragment flag */ 53 #define IP_MF 0x2000 /* more fragments flag */ 54 uchar_t ip_ttl; /* time to live */ 55 uchar_t ip_p; /* protocol */ 56 ushort_t ip_sum; /* checksum */ 57 struct in_addr ip_src, ip_dst; /* source and dest address */ 58 }; 59 60 #define IP_MAXPACKET 65535 /* maximum packet size */ 61 62 /* 63 * Definitions for IP type of service (ip_tos) 64 */ 65 #define IPTOS_LOWDELAY 0x10 66 #define IPTOS_THROUGHPUT 0x08 67 #define IPTOS_RELIABILITY 0x04 68 #define IPTOS_ECT 0x02 /* ECN-Capable Transport flag */ 69 #define IPTOS_CE 0x01 /* ECN-Congestion Experienced flag */ 70 71 /* 72 * Definitions for IP precedence (also in ip_tos) (hopefully unused) 73 */ 74 #define IPTOS_PREC_NETCONTROL 0xe0 75 #define IPTOS_PREC_INTERNETCONTROL 0xc0 76 #define IPTOS_PREC_CRITIC_ECP 0xa0 77 #define IPTOS_PREC_FLASHOVERRIDE 0x80 78 #define IPTOS_PREC_FLASH 0x60 79 #define IPTOS_PREC_IMMEDIATE 0x40 80 #define IPTOS_PREC_PRIORITY 0x20 81 #define IPTOS_PREC_ROUTINE 0x00 82 83 /* 84 * Definitions for options. 85 */ 86 87 /* Bits in the option value */ 88 #define IPOPT_COPY 0x80 89 90 #define IPOPT_COPIED(o) ((o)&0x80) 91 #define IPOPT_CLASS(o) ((o)&0x60) 92 #define IPOPT_NUMBER(o) ((o)&0x1f) 93 94 #define IPOPT_CONTROL 0x00 95 #define IPOPT_RESERVED1 0x20 96 #define IPOPT_DEBMEAS 0x40 97 #define IPOPT_RESERVED2 0x60 98 99 #define IPOPT_EOL 0x00 /* end of option list */ 100 #define IPOPT_NOP 0x01 /* no operation */ 101 102 #define IPOPT_RR 0x07 /* record packet route */ 103 #define IPOPT_RTRALERT 0x14 /* router alert */ 104 #define IPOPT_TS 0x44 /* timestamp */ 105 #define IPOPT_SECURITY 0x82 /* provide s,c,h,tcc */ 106 #define IPOPT_LSRR 0x83 /* loose source route */ 107 #define IPOPT_EXTSEC 0x85 108 #define IPOPT_COMSEC 0x86 109 #define IPOPT_SATID 0x88 /* satnet id */ 110 #define IPOPT_SSRR 0x89 /* strict source route */ 111 #define IPOPT_RA 0x94 112 #define IPOPT_SDMDD 0x95 113 114 /* 115 * Offsets to fields in options other than EOL and NOP. 116 */ 117 #define IPOPT_OPTVAL 0 /* option ID */ 118 #define IPOPT_OLEN 1 /* option length */ 119 #define IPOPT_OFFSET 2 /* offset within option */ 120 #define IPOPT_POS_OV_FLG 3 121 #define IPOPT_MINOFF 4 /* min value of IPOPT_OFFSET */ 122 123 124 /* Minimum for src and record route options */ 125 #define IPOPT_MINOFF_SR IPOPT_MINOFF 126 127 /* 128 * Time stamp option structure. 129 */ 130 struct ip_timestamp { 131 uchar_t ipt_code; /* IPOPT_TS */ 132 uchar_t ipt_len; /* size of structure (variable) */ 133 uchar_t ipt_ptr; /* index of current entry */ 134 #ifdef _BIT_FIELDS_LTOH 135 uchar_t ipt_flg:4, /* flags, see below */ 136 ipt_oflw:4; /* overflow counter */ 137 #else 138 uchar_t ipt_oflw:4, /* overflow counter */ 139 ipt_flg:4; /* flags, see below */ 140 #endif 141 union ipt_timestamp { 142 uint32_t ipt_time[1]; 143 struct ipt_ta { 144 struct in_addr ipt_addr; 145 uint32_t ipt_time; 146 } ipt_ta[1]; 147 } ipt_timestamp; 148 }; 149 150 /* flag bits for ipt_flg */ 151 #define IPOPT_TS_TSONLY 0 /* timestamps only */ 152 #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ 153 #define IPOPT_TS_PRESPEC 2 /* specified modules only */ 154 #define IPOPT_TS_PRESPEC_RFC791 3 155 156 /* Minimum for timestamp option */ 157 #define IPOPT_MINOFF_IT 5 158 #define IPOPT_MINLEN_IT 5 159 160 #define IPOPT_TS_TIMELEN 4 /* Timestamp size */ 161 162 /* bits for security (not byte swapped) */ 163 #define IPOPT_SECUR_UNCLASS 0x0000 164 #define IPOPT_SECUR_CONFID 0xf135 165 #define IPOPT_SECUR_EFTO 0x789a 166 #define IPOPT_SECUR_MMMM 0xbc4d 167 #define IPOPT_SECUR_RESTR 0xaf13 168 #define IPOPT_SECUR_SECRET 0xd788 169 #define IPOPT_SECUR_TOPSECRET 0x6bc5 170 171 /* 172 * Internet implementation parameters. 173 */ 174 #define MAXTTL 255 /* maximum time to live (seconds) */ 175 #define IPFRAGTTL 60 /* time to live for frags, slowhz */ 176 #define IPTTLDEC 1 /* subtracted when forwarding */ 177 178 #define IP_MSS 576 /* default maximum segment size */ 179 180 #ifdef __cplusplus 181 } 182 #endif 183 184 #endif /* _NETINET_IP_H */ 185