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/* |
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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 8.1 (Berkeley) 6/10/93 |
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* ip.h,v 1.3 1994/08/21 05:27:30 paul Exp |
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*/ |
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|
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#ifndef _IP_H_ |
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#define _IP_H_ |
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|
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#ifdef WORDS_BIGENDIAN |
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# ifndef NTOHL |
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# define NTOHL(d) |
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# endif |
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# ifndef NTOHS |
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# define NTOHS(d) |
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# endif |
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# ifndef HTONL |
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# define HTONL(d) |
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# endif |
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# ifndef HTONS |
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# define HTONS(d) |
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# endif |
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#else |
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# ifndef NTOHL |
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# define NTOHL(d) ((d) = ntohl((d))) |
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# endif |
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# ifndef NTOHS |
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# define NTOHS(d) ((d) = ntohs((u_int16_t)(d))) |
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# endif |
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# ifndef HTONL |
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# define HTONL(d) ((d) = htonl((d))) |
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# endif |
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# ifndef HTONS |
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# define HTONS(d) ((d) = htons((u_int16_t)(d))) |
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# endif |
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#endif |
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|
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typedef u_int32_t n_long; /* long as received from the net */ |
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|
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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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/* |
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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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#ifdef PRAGMA_PACK_SUPPORTED |
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#pragma pack(1) |
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#endif |
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|
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struct ip { |
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#ifdef WORDS_BIGENDIAN |
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u_char ip_v:4, /* version */ |
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ip_hl:4; /* header length */ |
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#else |
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u_char ip_hl:4, /* header length */ |
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ip_v:4; /* version */ |
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#endif |
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u_int8_t ip_tos; /* type of service */ |
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int16_t ip_len; /* total length */ |
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u_int16_t ip_id; /* identification */ |
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int16_t ip_off; /* fragment offset field */ |
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#define IP_DF 0x4000 /* don't 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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u_int8_t ip_ttl; /* time to live */ |
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u_int8_t ip_p; /* protocol */ |
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u_int16_t ip_sum; /* checksum */ |
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struct in_addr ip_src,ip_dst; /* source and dest address */ |
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} PACKED__; |
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|
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#ifdef PRAGMA_PACK_SUPPORTED |
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#pragma pack(0) |
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#endif |
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|
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#define IP_MAXPACKET 65535 /* maximum packet size */ |
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|
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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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/* |
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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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|
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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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|
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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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|
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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_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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|
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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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/* |
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* Time stamp option structure. |
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*/ |
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#ifdef PRAGMA_PACK_SUPPORTED |
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#pragma pack(1) |
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#endif |
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|
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struct ip_timestamp { |
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u_int8_t ipt_code; /* IPOPT_TS */ |
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u_int8_t ipt_len; /* size of structure (variable) */ |
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u_int8_t ipt_ptr; /* index of current entry */ |
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#ifdef WORDS_BIGENDIAN |
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u_char ipt_oflw:4, /* overflow counter */ |
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ipt_flg:4; /* flags, see below */ |
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#else |
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u_char ipt_flg:4, /* flags, see below */ |
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ipt_oflw:4; /* overflow counter */ |
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#endif |
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union ipt_timestamp { |
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n_long ipt_time[1]; |
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struct ipt_ta { |
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struct in_addr ipt_addr; |
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n_long ipt_time; |
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} ipt_ta[1]; |
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} ipt_timestamp; |
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} PACKED__; |
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|
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#ifdef PRAGMA_PACK_SUPPORTED |
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#pragma pack(0) |
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#endif |
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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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|
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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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/* |
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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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|
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#define IP_MSS 576 /* default maximum segment size */ |
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|
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#ifdef HAVE_SYS_TYPES32_H /* Overcome some Solaris 2.x junk */ |
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#include <sys/types32.h> |
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#else |
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#if SIZEOF_CHAR_P == 4 |
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typedef caddr_t caddr32_t; |
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#else |
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typedef u_int32_t caddr32_t; |
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#endif |
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#endif |
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|
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#if SIZEOF_CHAR_P == 4 |
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typedef struct ipq *ipqp_32; |
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typedef struct ipasfrag *ipasfragp_32; |
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#else |
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typedef caddr32_t ipqp_32; |
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typedef caddr32_t ipasfragp_32; |
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#endif |
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|
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/* |
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* Overlay for ip header used by other protocols (tcp, udp). |
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*/ |
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#ifdef PRAGMA_PACK_SUPPORTED |
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#pragma pack(1) |
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#endif |
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|
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struct ipovly { |
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caddr32_t ih_next, ih_prev; /* for protocol sequence q's */ |
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u_int8_t ih_x1; /* (unused) */ |
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u_int8_t ih_pr; /* protocol */ |
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int16_t ih_len; /* protocol length */ |
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struct in_addr ih_src; /* source internet address */ |
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struct in_addr ih_dst; /* destination internet address */ |
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} PACKED__; |
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|
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#ifdef PRAGMA_PACK_SUPPORTED |
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#pragma pack(0) |
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#endif |
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|
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/* |
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* Ip reassembly queue structure. Each fragment |
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* being reassembled is attached to one of these structures. |
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* They are timed out after ipq_ttl drops to 0, and may also |
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* be reclaimed if memory becomes tight. |
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* size 28 bytes |
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*/ |
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struct ipq { |
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ipqp_32 next,prev; /* to other reass headers */ |
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u_int8_t ipq_ttl; /* time for reass q to live */ |
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u_int8_t ipq_p; /* protocol of this fragment */ |
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u_int16_t ipq_id; /* sequence id for reassembly */ |
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ipasfragp_32 ipq_next,ipq_prev; |
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/* to ip headers of fragments */ |
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struct in_addr ipq_src,ipq_dst; |
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}; |
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|
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/* |
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* Ip header, when holding a fragment. |
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* |
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* Note: ipf_next must be at same offset as ipq_next above |
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*/ |
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struct ipasfrag { |
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#ifdef WORDS_BIGENDIAN |
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u_char ip_v:4, |
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ip_hl:4; |
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#else |
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u_char ip_hl:4, |
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ip_v:4; |
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#endif |
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/* BUG : u_int changed to u_int8_t. |
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* sizeof(u_int)==4 on linux 2.0 |
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*/ |
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u_int8_t ipf_mff; /* XXX overlays ip_tos: use low bit |
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* to avoid destroying tos (PPPDTRuu); |
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* copied from (ip_off&IP_MF) */ |
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int16_t ip_len; |
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u_int16_t ip_id; |
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int16_t ip_off; |
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u_int8_t ip_ttl; |
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u_int8_t ip_p; |
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u_int16_t ip_sum; |
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ipasfragp_32 ipf_next; /* next fragment */ |
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ipasfragp_32 ipf_prev; /* previous fragment */ |
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}; |
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|
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/* |
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* Structure stored in mbuf in inpcb.ip_options |
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* and passed to ip_output when ip options are in use. |
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* The actual length of the options (including ipopt_dst) |
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* is in m_len. |
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*/ |
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#define MAX_IPOPTLEN 40 |
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|
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struct ipoption { |
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struct in_addr ipopt_dst; /* first-hop dst if source routed */ |
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int8_t ipopt_list[MAX_IPOPTLEN]; /* options proper */ |
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}; |
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|
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/* |
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* Structure attached to inpcb.ip_moptions and |
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* passed to ip_output when IP multicast options are in use. |
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*/ |
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|
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struct ipstat { |
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u_long ips_total; /* total packets received */ |
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u_long ips_badsum; /* checksum bad */ |
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u_long ips_tooshort; /* packet too short */ |
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u_long ips_toosmall; /* not enough data */ |
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u_long ips_badhlen; /* ip header length < data size */ |
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u_long ips_badlen; /* ip length < ip header length */ |
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u_long ips_fragments; /* fragments received */ |
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u_long ips_fragdropped; /* frags dropped (dups, out of space) */ |
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u_long ips_fragtimeout; /* fragments timed out */ |
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u_long ips_forward; /* packets forwarded */ |
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u_long ips_cantforward; /* packets rcvd for unreachable dest */ |
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u_long ips_redirectsent; /* packets forwarded on same net */ |
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u_long ips_noproto; /* unknown or unsupported protocol */ |
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u_long ips_delivered; /* datagrams delivered to upper level*/ |
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u_long ips_localout; /* total ip packets generated here */ |
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u_long ips_odropped; /* lost packets due to nobufs, etc. */ |
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u_long ips_reassembled; /* total packets reassembled ok */ |
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u_long ips_fragmented; /* datagrams successfully fragmented */ |
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u_long ips_ofragments; /* output fragments created */ |
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u_long ips_cantfrag; /* don't fragment flag was set, etc. */ |
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u_long ips_badoptions; /* error in option processing */ |
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u_long ips_noroute; /* packets discarded due to no route */ |
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u_long ips_badvers; /* ip version != 4 */ |
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u_long ips_rawout; /* total raw ip packets generated */ |
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u_long ips_unaligned; /* times the ip packet was not aligned */ |
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}; |
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|
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extern struct ipstat ipstat; |
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extern struct ipq ipq; /* ip reass. queue */ |
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extern u_int16_t ip_id; /* ip packet ctr, for ids */ |
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extern int ip_defttl; /* default IP ttl */ |
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|
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#endif |
