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164 lines
5.7 KiB
164 lines
5.7 KiB
/* |
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* Copyright (c) 1982, 1986, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* This product includes software developed by the University of |
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* California, Berkeley and its contributors. |
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* 4. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* @(#)ip.h 8.2 (Berkeley) 6/1/94 |
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*/ |
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#ifndef netdissect_ip_h |
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#define netdissect_ip_h |
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/* |
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* Definitions for internet protocol version 4. |
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* Per RFC 791, September 1981. |
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*/ |
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#define IPVERSION 4 |
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/* |
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* Structure of an internet header, naked of options. |
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* |
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* We declare ip_len and ip_off to be short, rather than u_short |
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* pragmatically since otherwise unsigned comparisons can result |
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* against negative integers quite easily, and fail in subtle ways. |
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*/ |
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struct ip { |
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nd_uint8_t ip_vhl; /* header length, version */ |
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#define IP_V(ip) (((ip)->ip_vhl & 0xf0) >> 4) |
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#define IP_HL(ip) ((ip)->ip_vhl & 0x0f) |
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nd_uint8_t ip_tos; /* type of service */ |
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nd_uint16_t ip_len; /* total length */ |
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nd_uint16_t ip_id; /* identification */ |
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nd_uint16_t ip_off; /* fragment offset field */ |
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#define IP_DF 0x4000 /* dont fragment flag */ |
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#define IP_MF 0x2000 /* more fragments flag */ |
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#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ |
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nd_uint8_t ip_ttl; /* time to live */ |
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nd_uint8_t ip_p; /* protocol */ |
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nd_uint16_t ip_sum; /* checksum */ |
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nd_ipv4 ip_src,ip_dst; /* source and dest address */ |
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}; |
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#define IP_MAXPACKET 65535 /* maximum packet size */ |
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/* |
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* Definitions for IP type of service (ip_tos) |
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*/ |
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#define IPTOS_LOWDELAY 0x10 |
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#define IPTOS_THROUGHPUT 0x08 |
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#define IPTOS_RELIABILITY 0x04 |
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/* |
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* Definitions for IP precedence (also in ip_tos) (hopefully unused) |
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*/ |
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#define IPTOS_PREC_NETCONTROL 0xe0 |
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#define IPTOS_PREC_INTERNETCONTROL 0xc0 |
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#define IPTOS_PREC_CRITIC_ECP 0xa0 |
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#define IPTOS_PREC_FLASHOVERRIDE 0x80 |
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#define IPTOS_PREC_FLASH 0x60 |
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#define IPTOS_PREC_IMMEDIATE 0x40 |
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#define IPTOS_PREC_PRIORITY 0x20 |
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#define IPTOS_PREC_ROUTINE 0x00 |
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/* |
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* Definitions for options. |
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*/ |
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#define IPOPT_COPIED(o) ((o)&0x80) |
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#define IPOPT_CLASS(o) ((o)&0x60) |
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#define IPOPT_NUMBER(o) ((o)&0x1f) |
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#define IPOPT_CONTROL 0x00 |
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#define IPOPT_RESERVED1 0x20 |
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#define IPOPT_DEBMEAS 0x40 |
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#define IPOPT_RESERVED2 0x60 |
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#define IPOPT_EOL 0 /* end of option list */ |
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#define IPOPT_NOP 1 /* no operation */ |
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#define IPOPT_RR 7 /* record packet route */ |
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#define IPOPT_TS 68 /* timestamp */ |
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#define IPOPT_RFC1393 82 /* traceroute RFC 1393 */ |
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#define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ |
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#define IPOPT_LSRR 131 /* loose source route */ |
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#define IPOPT_SATID 136 /* satnet id */ |
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#define IPOPT_SSRR 137 /* strict source route */ |
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#define IPOPT_RA 148 /* router-alert, rfc2113 */ |
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/* |
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* Offsets to fields in options other than EOL and NOP. |
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*/ |
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#define IPOPT_OPTVAL 0 /* option ID */ |
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#define IPOPT_OLEN 1 /* option length */ |
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#define IPOPT_OFFSET 2 /* offset within option */ |
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#define IPOPT_MINOFF 4 /* min value of above */ |
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/* |
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* Time stamp option structure. |
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*/ |
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struct ip_timestamp { |
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nd_uint8_t ipt_code; /* IPOPT_TS */ |
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nd_uint8_t ipt_len; /* size of structure (variable) */ |
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nd_uint8_t ipt_ptr; /* index of current entry */ |
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nd_uint8_t ipt_oflwflg; /* flags, overflow counter */ |
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#define IPTS_OFLW(ip) (((ipt)->ipt_oflwflg & 0xf0) >> 4) |
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#define IPTS_FLG(ip) ((ipt)->ipt_oflwflg & 0x0f) |
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union ipt_timestamp { |
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nd_uint32_t ipt_time[1]; |
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struct ipt_ta { |
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nd_ipv4 ipt_addr; |
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nd_uint32_t ipt_time; |
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} ipt_ta[1]; |
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} ipt_timestamp; |
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}; |
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/* flag bits for ipt_flg */ |
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#define IPOPT_TS_TSONLY 0 /* timestamps only */ |
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#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ |
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#define IPOPT_TS_PRESPEC 3 /* specified modules only */ |
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/* bits for security (not byte swapped) */ |
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#define IPOPT_SECUR_UNCLASS 0x0000 |
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#define IPOPT_SECUR_CONFID 0xf135 |
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#define IPOPT_SECUR_EFTO 0x789a |
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#define IPOPT_SECUR_MMMM 0xbc4d |
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#define IPOPT_SECUR_RESTR 0xaf13 |
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#define IPOPT_SECUR_SECRET 0xd788 |
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#define IPOPT_SECUR_TOPSECRET 0x6bc5 |
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/* |
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* Internet implementation parameters. |
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*/ |
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#define MAXTTL 255 /* maximum time to live (seconds) */ |
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#define IPDEFTTL 64 /* default ttl, from RFC 1340 */ |
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#define IPFRAGTTL 60 /* time to live for frags, slowhz */ |
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#define IPTTLDEC 1 /* subtracted when forwarding */ |
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#define IP_MSS 576 /* default maximum segment size */ |
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#endif /* netdissect_ip_h */
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