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Diffstat (limited to 'libc/include/netinet/ip.h')
| -rw-r--r-- | libc/include/netinet/ip.h | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/libc/include/netinet/ip.h b/libc/include/netinet/ip.h new file mode 100644 index 0000000..541905c --- /dev/null +++ b/libc/include/netinet/ip.h @@ -0,0 +1,275 @@ +/* $OpenBSD: ip.h,v 1.12 2006/04/27 02:19:32 tedu Exp $ */ +/* $NetBSD: ip.h,v 1.9 1995/05/15 01:22:44 cgd Exp $ */ + +/* + * Copyright (c) 1982, 1986, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)ip.h 8.1 (Berkeley) 6/10/93 + */ + +#ifndef _NETINET_IP_H_ +#define _NETINET_IP_H_ + +#include <sys/cdefs.h> +#include <sys/types.h> +#include <endian.h> +#include <netinet/in.h> +#include <netinet/in_systm.h> + +__BEGIN_DECLS + +/* + * Definitions for internet protocol version 4. + * Per RFC 791, September 1981. + */ +#define IPVERSION 4 + +/* + * Structure of an internet header, naked of options. + */ +struct ip { +#if BYTE_ORDER == LITTLE_ENDIAN + u_int32_t ip_hl:4, /* header length */ + ip_v:4; /* version */ +#endif +#if BYTE_ORDER == BIG_ENDIAN + u_int32_t ip_v:4, /* version */ + ip_hl:4; /* header length */ +#endif + u_int8_t ip_tos; /* type of service */ + u_int16_t ip_len; /* total length */ + u_int16_t ip_id; /* identification */ + u_int16_t ip_off; /* fragment offset field */ +#define IP_RF 0x8000 /* reserved fragment flag */ +#define IP_DF 0x4000 /* dont fragment flag */ +#define IP_MF 0x2000 /* more fragments flag */ +#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ + u_int8_t ip_ttl; /* time to live */ + u_int8_t ip_p; /* protocol */ + u_int16_t ip_sum; /* checksum */ + struct in_addr ip_src, ip_dst; /* source and dest address */ +}; + +#define IP_MAXPACKET 65535 /* maximum packet size */ + +/* + * Definitions for IP type of service (ip_tos) + */ +#define IPTOS_LOWDELAY 0x10 +#define IPTOS_THROUGHPUT 0x08 +#define IPTOS_RELIABILITY 0x04 +/* IPTOS_LOWCOST 0x02 XXX */ +#if 1 +/* ECN RFC3168 obsoletes RFC2481, and these will be deprecated soon. */ +#define IPTOS_CE 0x01 /* congestion experienced */ +#define IPTOS_ECT 0x02 /* ECN-capable transport */ +#endif + +/* + * Definitions for IP precedence (also in ip_tos) (hopefully unused) + */ +#define IPTOS_PREC_NETCONTROL 0xe0 +#define IPTOS_PREC_INTERNETCONTROL 0xc0 +#define IPTOS_PREC_CRITIC_ECP 0xa0 +#define IPTOS_PREC_FLASHOVERRIDE 0x80 +#define IPTOS_PREC_FLASH 0x60 +#define IPTOS_PREC_IMMEDIATE 0x40 +#define IPTOS_PREC_PRIORITY 0x20 +#define IPTOS_PREC_ROUTINE 0x00 + +/* + * ECN (Explicit Congestion Notification) codepoints in RFC3168 + * mapped to the lower 2 bits of the TOS field. + */ +#define IPTOS_ECN_NOTECT 0x00 /* not-ECT */ +#define IPTOS_ECN_ECT1 0x01 /* ECN-capable transport (1) */ +#define IPTOS_ECN_ECT0 0x02 /* ECN-capable transport (0) */ +#define IPTOS_ECN_CE 0x03 /* congestion experienced */ +#define IPTOS_ECN_MASK 0x03 /* ECN field mask */ + +/* + * Definitions for options. + */ +#define IPOPT_COPIED(o) ((o)&0x80) +#define IPOPT_CLASS(o) ((o)&0x60) +#define IPOPT_NUMBER(o) ((o)&0x1f) + +#define IPOPT_CONTROL 0x00 +#define IPOPT_RESERVED1 0x20 +#define IPOPT_DEBMEAS 0x40 +#define IPOPT_RESERVED2 0x60 + +#define IPOPT_EOL 0 /* end of option list */ +#define IPOPT_NOP 1 /* no operation */ + +#define IPOPT_RR 7 /* record packet route */ +#define IPOPT_TS 68 /* timestamp */ +#define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ +#define IPOPT_LSRR 131 /* loose source route */ +#define IPOPT_SATID 136 /* satnet id */ +#define IPOPT_SSRR 137 /* strict source route */ + +/* + * Offsets to fields in options other than EOL and NOP. + */ +#define IPOPT_OPTVAL 0 /* option ID */ +#define IPOPT_OLEN 1 /* option length */ +#define IPOPT_OFFSET 2 /* offset within option */ +#define IPOPT_MINOFF 4 /* min value of above */ + +/* + * Time stamp option structure. + */ +struct ip_timestamp { + u_int8_t ipt_code; /* IPOPT_TS */ + u_int8_t ipt_len; /* size of structure (variable) */ + u_int8_t ipt_ptr; /* index of current entry */ +#if _BYTE_ORDER == _LITTLE_ENDIAN + u_int32_t ipt_flg:4, /* flags, see below */ + ipt_oflw:4; /* overflow counter */ +#endif +#if _BYTE_ORDER == _BIG_ENDIAN + u_int32_t ipt_oflw:4, /* overflow counter */ + ipt_flg:4; /* flags, see below */ +#endif + union ipt_timestamp { + n_time ipt_time[1]; + struct ipt_ta { + struct in_addr ipt_addr; + n_time ipt_time; + } ipt_ta[1]; + } ipt_timestamp; +}; + +/* flag bits for ipt_flg */ +#define IPOPT_TS_TSONLY 0 /* timestamps only */ +#define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ +#define IPOPT_TS_PRESPEC 3 /* specified modules only */ + +/* bits for security (not byte swapped) */ +#define IPOPT_SECUR_UNCLASS 0x0000 +#define IPOPT_SECUR_CONFID 0xf135 +#define IPOPT_SECUR_EFTO 0x789a +#define IPOPT_SECUR_MMMM 0xbc4d +#define IPOPT_SECUR_RESTR 0xaf13 +#define IPOPT_SECUR_SECRET 0xd788 +#define IPOPT_SECUR_TOPSECRET 0x6bc5 + +/* + * Internet implementation parameters. + */ +#define MAXTTL 255 /* maximum time to live (seconds) */ +#define IPDEFTTL 64 /* default ttl, from RFC 1340 */ +#define IPFRAGTTL 60 /* time to live for frags, slowhz */ +#define IPTTLDEC 1 /* subtracted when forwarding */ + +#define IP_MSS 576 /* default maximum segment size */ + +/* + * This is the real IPv4 pseudo header, used for computing the TCP and UDP + * checksums. For the Internet checksum, struct ipovly can be used instead. + * For stronger checksums, the real thing must be used. + */ +struct ippseudo { + struct in_addr ippseudo_src; /* source internet address */ + struct in_addr ippseudo_dst; /* destination internet address */ + u_int8_t ippseudo_pad; /* pad, must be zero */ + u_int8_t ippseudo_p; /* protocol */ + u_int16_t ippseudo_len; /* protocol length */ +}; + +/* BIONIC addition: declarations matching the Linux kernel */ +/* some programs expect these... */ + +#define IPOPT_OPTVAL 0 +#define IPOPT_OLEN 1 +#define IPOPT_OFFSET 2 +#define IPOPT_MINOFF 4 +#define MAX_IPOPTLEN 40 + +#define IPOPT_COPY 0x80 +#define IPOPT_CLASS_MASK 0x60 +#define IPOPT_NUMBER_MASK 0x1f + +#define IPOPT_CONTROL 0x00 +#define IPOPT_RESERVED1 0x20 +#define IPOPT_MEASUREMENT 0x40 +#define IPOPT_RESERVED2 0x60 + +#define IPOPT_END (0 |IPOPT_CONTROL) +#define IPOPT_NOOP (1 |IPOPT_CONTROL) +#define IPOPT_SEC (2 |IPOPT_CONTROL|IPOPT_COPY) +#define IPOPT_TIMESTAMP (4 |IPOPT_MEASUREMENT) +#define IPOPT_SID (8 |IPOPT_CONTROL|IPOPT_COPY) +#define IPOPT_RA (20|IPOPT_CONTROL|IPOPT_COPY) + +struct iphdr { +#if defined(__LITTLE_ENDIAN_BITFIELD) + uint8_t ihl :4, + version:4; +#elif defined (__BIG_ENDIAN_BITFIELD) + uint8_t version:4, + ihl :4; +#else +#error "Please fix <asm/byteorder.h>" +#endif + uint8_t tos; + uint16_t tot_len; + uint16_t id; + uint16_t frag_off; + uint8_t ttl; + uint8_t protocol; + uint16_t check; + int32_t saddr; + int32_t daddr; +}; + +struct ip_auth_hdr { + uint8_t nexthdr; + uint8_t hdrlen; + uint16_t reserved; + uint32_t spi; + uint32_t seq_no; + uint8_t auth_data[0]; +}; + +struct ip_esp_hdr { + uint32_t spi; + uint32_t seq_no; + uint8_t enc_data[0]; +}; + +struct ip_comp_hdr { + uint8_t nexthdr; + uint8_t flags; + uint16_t cpi; +}; + +__END_DECLS + +#endif /* _NETINET_IP_H_ */ |