Archipelago » qemu

/*

 * 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

 * ip.h,v 1.3 1994/08/21 05:27:30 paul Exp

 */

#ifndef _IP_H_

#define _IP_H_

#ifdef HOST_WORDS_BIGENDIAN

# ifndef NTOHL

#  define NTOHL(d)

# endif

# ifndef NTOHS

#  define NTOHS(d)

# endif

# ifndef HTONL

#  define HTONL(d)

# endif

# ifndef HTONS

#  define HTONS(d)

# endif

#else

# ifndef NTOHL

#  define NTOHL(d) ((d) = ntohl((d)))

# endif

# ifndef NTOHS

#  define NTOHS(d) ((d) = ntohs((uint16_t)(d)))

# endif

# ifndef HTONL

#  define HTONL(d) ((d) = htonl((d)))

# endif

# ifndef HTONS

#  define HTONS(d) ((d) = htons((uint16_t)(d)))

# endif

#endif

typedef uint32_t n_long;                 /* long as received from the net */

/*

 * Definitions for internet protocol version 4.

 * Per RFC 791, September 1981.

 */

#define        IPVERSION        4

/*

 * Structure of an internet header, naked of options.

 */

struct ip {

#ifdef HOST_WORDS_BIGENDIAN

        u_int ip_v:4,                        /* version */

                ip_hl:4;                /* header length */

#else

        u_int ip_hl:4,                /* header length */

                ip_v:4;                        /* version */

#endif

        uint8_t                ip_tos;                        /* type of service */

        uint16_t        ip_len;                        /* total length */

        uint16_t        ip_id;                        /* identification */

        uint16_t        ip_off;                        /* fragment offset field */

#define        IP_DF 0x4000                        /* don't fragment flag */

#define        IP_MF 0x2000                        /* more fragments flag */

#define        IP_OFFMASK 0x1fff                /* mask for fragmenting bits */

        uint8_t ip_ttl;                        /* time to live */

        uint8_t ip_p;                        /* protocol */

        uint16_t        ip_sum;                        /* checksum */

        struct        in_addr ip_src,ip_dst;        /* source and dest address */

} __attribute__((packed));

#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

/*

 * 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 {

        uint8_t        ipt_code;                /* IPOPT_TS */

        uint8_t        ipt_len;                /* size of structure (variable) */

        uint8_t        ipt_ptr;                /* index of current entry */

#ifdef HOST_WORDS_BIGENDIAN

        u_int        ipt_oflw:4,                /* overflow counter */

                ipt_flg:4;                /* flags, see below */

#else

        u_int        ipt_flg:4,                /* flags, see below */

                ipt_oflw:4;                /* overflow counter */

#endif

        union ipt_timestamp {

                n_long        ipt_time[1];

                struct        ipt_ta {

                        struct in_addr ipt_addr;

                        n_long ipt_time;

                } ipt_ta[1];

        } ipt_timestamp;

} __attribute__((packed));

/* 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 */

#if SIZEOF_CHAR_P == 4

struct mbuf_ptr {

        struct mbuf *mptr;

        uint32_t dummy;

} __attribute__((packed));

#else

struct mbuf_ptr {

        struct mbuf *mptr;

} __attribute__((packed));

#endif

struct qlink {

        void *next, *prev;

};

/*

 * Overlay for ip header used by other protocols (tcp, udp).

 */

struct ipovly {

        struct mbuf_ptr ih_mbuf;        /* backpointer to mbuf */

        uint8_t        ih_x1;                        /* (unused) */

        uint8_t        ih_pr;                        /* protocol */

        uint16_t        ih_len;                        /* protocol length */

        struct        in_addr ih_src;                /* source internet address */

        struct        in_addr ih_dst;                /* destination internet address */

} __attribute__((packed));

/*

 * Ip reassembly queue structure.  Each fragment

 * being reassembled is attached to one of these structures.

 * They are timed out after ipq_ttl drops to 0, and may also

 * be reclaimed if memory becomes tight.

 * size 28 bytes

 */

struct ipq {

        struct qlink frag_link;                        /* to ip headers of fragments */

        struct qlink ip_link;                                /* to other reass headers */

        uint8_t        ipq_ttl;                /* time for reass q to live */

        uint8_t        ipq_p;                        /* protocol of this fragment */

        uint16_t        ipq_id;                        /* sequence id for reassembly */

        struct        in_addr ipq_src,ipq_dst;

} __attribute__((packed));

/*

 * Ip header, when holding a fragment.

 *

 * Note: ipf_link must be at same offset as frag_link above

 */

struct        ipasfrag {

        struct qlink ipf_link;

        struct ip ipf_ip;

} __attribute__((packed));

#define ipf_off      ipf_ip.ip_off

#define ipf_tos      ipf_ip.ip_tos

#define ipf_len      ipf_ip.ip_len

#define ipf_next     ipf_link.next

#define ipf_prev     ipf_link.prev

/*

 * Structure stored in mbuf in inpcb.ip_options

 * and passed to ip_output when ip options are in use.

 * The actual length of the options (including ipopt_dst)

 * is in m_len.

 */

#define MAX_IPOPTLEN        40

struct ipoption {

        struct        in_addr ipopt_dst;        /* first-hop dst if source routed */

        int8_t        ipopt_list[MAX_IPOPTLEN];        /* options proper */

} __attribute__((packed));

#endif