Annotation of qemu/slirp/ip_icmp.h, revision 1.1.1.4

1.1       root        1: /*
                      2:  * Copyright (c) 1982, 1986, 1993
                      3:  *     The Regents of the University of California.  All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
1.1.1.2   root       13:  * 3. Neither the name of the University nor the names of its contributors
1.1       root       14:  *    may be used to endorse or promote products derived from this software
                     15:  *    without specific prior written permission.
                     16:  *
                     17:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     27:  * SUCH DAMAGE.
                     28:  *
                     29:  *     @(#)ip_icmp.h   8.1 (Berkeley) 6/10/93
                     30:  * ip_icmp.h,v 1.4 1995/05/30 08:09:43 rgrimes Exp
                     31:  */
                     32: 
                     33: #ifndef _NETINET_IP_ICMP_H_
                     34: #define _NETINET_IP_ICMP_H_
                     35: 
                     36: /*
                     37:  * Interface Control Message Protocol Definitions.
                     38:  * Per RFC 792, September 1981.
                     39:  */
                     40: 
1.1.1.4 ! root       41: typedef uint32_t n_time;
1.1       root       42: 
                     43: /*
                     44:  * Structure of an icmp header.
                     45:  */
                     46: struct icmp {
                     47:        u_char  icmp_type;              /* type of message, see below */
                     48:        u_char  icmp_code;              /* type sub code */
                     49:        u_short icmp_cksum;             /* ones complement cksum of struct */
                     50:        union {
                     51:                u_char ih_pptr;                 /* ICMP_PARAMPROB */
                     52:                struct in_addr ih_gwaddr;       /* ICMP_REDIRECT */
                     53:                struct ih_idseq {
                     54:                        u_short icd_id;
                     55:                        u_short icd_seq;
                     56:                } ih_idseq;
                     57:                int ih_void;
                     58: 
                     59:                /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
                     60:                struct ih_pmtu {
                     61:                        u_short ipm_void;
                     62:                        u_short ipm_nextmtu;
                     63:                } ih_pmtu;
                     64:        } icmp_hun;
                     65: #define        icmp_pptr       icmp_hun.ih_pptr
                     66: #define        icmp_gwaddr     icmp_hun.ih_gwaddr
                     67: #define        icmp_id         icmp_hun.ih_idseq.icd_id
                     68: #define        icmp_seq        icmp_hun.ih_idseq.icd_seq
                     69: #define        icmp_void       icmp_hun.ih_void
                     70: #define        icmp_pmvoid     icmp_hun.ih_pmtu.ipm_void
                     71: #define        icmp_nextmtu    icmp_hun.ih_pmtu.ipm_nextmtu
                     72:        union {
                     73:                struct id_ts {
                     74:                        n_time its_otime;
                     75:                        n_time its_rtime;
                     76:                        n_time its_ttime;
                     77:                } id_ts;
                     78:                struct id_ip  {
                     79:                        struct ip idi_ip;
                     80:                        /* options and then 64 bits of data */
                     81:                } id_ip;
                     82:                uint32_t        id_mask;
                     83:                char            id_data[1];
                     84:        } icmp_dun;
                     85: #define        icmp_otime      icmp_dun.id_ts.its_otime
                     86: #define        icmp_rtime      icmp_dun.id_ts.its_rtime
                     87: #define        icmp_ttime      icmp_dun.id_ts.its_ttime
                     88: #define        icmp_ip         icmp_dun.id_ip.idi_ip
                     89: #define        icmp_mask       icmp_dun.id_mask
                     90: #define        icmp_data       icmp_dun.id_data
                     91: };
                     92: 
                     93: /*
                     94:  * Lower bounds on packet lengths for various types.
                     95:  * For the error advice packets must first insure that the
                     96:  * packet is large enought to contain the returned ip header.
                     97:  * Only then can we do the check to see if 64 bits of packet
                     98:  * data have been returned, since we need to check the returned
                     99:  * ip header length.
                    100:  */
                    101: #define        ICMP_MINLEN     8                               /* abs minimum */
                    102: #define        ICMP_TSLEN      (8 + 3 * sizeof (n_time))       /* timestamp */
                    103: #define        ICMP_MASKLEN    12                              /* address mask */
                    104: #define        ICMP_ADVLENMIN  (8 + sizeof (struct ip) + 8)    /* min */
                    105: #define        ICMP_ADVLEN(p)  (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
                    106:        /* N.B.: must separately check that ip_hl >= 5 */
                    107: 
                    108: /*
                    109:  * Definition of type and code field values.
                    110:  */
                    111: #define        ICMP_ECHOREPLY          0               /* echo reply */
                    112: #define        ICMP_UNREACH            3               /* dest unreachable, codes: */
                    113: #define                ICMP_UNREACH_NET        0               /* bad net */
                    114: #define                ICMP_UNREACH_HOST       1               /* bad host */
                    115: #define                ICMP_UNREACH_PROTOCOL   2               /* bad protocol */
                    116: #define                ICMP_UNREACH_PORT       3               /* bad port */
                    117: #define                ICMP_UNREACH_NEEDFRAG   4               /* IP_DF caused drop */
                    118: #define                ICMP_UNREACH_SRCFAIL    5               /* src route failed */
                    119: #define                ICMP_UNREACH_NET_UNKNOWN 6              /* unknown net */
                    120: #define                ICMP_UNREACH_HOST_UNKNOWN 7             /* unknown host */
                    121: #define                ICMP_UNREACH_ISOLATED   8               /* src host isolated */
                    122: #define                ICMP_UNREACH_NET_PROHIB 9               /* prohibited access */
                    123: #define                ICMP_UNREACH_HOST_PROHIB 10             /* ditto */
                    124: #define                ICMP_UNREACH_TOSNET     11              /* bad tos for net */
                    125: #define                ICMP_UNREACH_TOSHOST    12              /* bad tos for host */
                    126: #define        ICMP_SOURCEQUENCH       4               /* packet lost, slow down */
                    127: #define        ICMP_REDIRECT           5               /* shorter route, codes: */
                    128: #define                ICMP_REDIRECT_NET       0               /* for network */
                    129: #define                ICMP_REDIRECT_HOST      1               /* for host */
                    130: #define                ICMP_REDIRECT_TOSNET    2               /* for tos and net */
                    131: #define                ICMP_REDIRECT_TOSHOST   3               /* for tos and host */
                    132: #define        ICMP_ECHO               8               /* echo service */
                    133: #define        ICMP_ROUTERADVERT       9               /* router advertisement */
                    134: #define        ICMP_ROUTERSOLICIT      10              /* router solicitation */
                    135: #define        ICMP_TIMXCEED           11              /* time exceeded, code: */
                    136: #define                ICMP_TIMXCEED_INTRANS   0               /* ttl==0 in transit */
                    137: #define                ICMP_TIMXCEED_REASS     1               /* ttl==0 in reass */
                    138: #define        ICMP_PARAMPROB          12              /* ip header bad */
                    139: #define                ICMP_PARAMPROB_OPTABSENT 1              /* req. opt. absent */
                    140: #define        ICMP_TSTAMP             13              /* timestamp request */
                    141: #define        ICMP_TSTAMPREPLY        14              /* timestamp reply */
                    142: #define        ICMP_IREQ               15              /* information request */
                    143: #define        ICMP_IREQREPLY          16              /* information reply */
                    144: #define        ICMP_MASKREQ            17              /* address mask request */
                    145: #define        ICMP_MASKREPLY          18              /* address mask reply */
                    146: 
                    147: #define        ICMP_MAXTYPE            18
                    148: 
                    149: #define        ICMP_INFOTYPE(type) \
                    150:        ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
                    151:        (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
                    152:        (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
                    153:        (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
                    154:        (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
                    155: 
1.1.1.3   root      156: void icmp_input(struct mbuf *, int);
1.1.1.2   root      157: void icmp_error(struct mbuf *msrc, u_char type, u_char code, int minsize,
                    158:                 const char *message);
1.1.1.3   root      159: void icmp_reflect(struct mbuf *);
1.1       root      160: 
                    161: #endif

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