bellard | f0cbd3e | 2004-04-22 00:10:48 +0000 | [diff] [blame] | 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. |
aliguori | 2f5f899 | 2009-01-26 19:37:41 +0000 | [diff] [blame] | 13 | * 3. Neither the name of the University nor the names of its contributors |
bellard | f0cbd3e | 2004-04-22 00:10:48 +0000 | [diff] [blame] | 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 | |
Markus Armbruster | 2a6a407 | 2016-06-29 13:47:03 +0200 | [diff] [blame] | 33 | #ifndef NETINET_IP_ICMP_H |
| 34 | #define NETINET_IP_ICMP_H |
bellard | f0cbd3e | 2004-04-22 00:10:48 +0000 | [diff] [blame] | 35 | |
| 36 | /* |
| 37 | * Interface Control Message Protocol Definitions. |
| 38 | * Per RFC 792, September 1981. |
| 39 | */ |
| 40 | |
Stefan Weil | b6dce92 | 2010-07-22 22:15:23 +0200 | [diff] [blame] | 41 | typedef uint32_t n_time; |
bellard | f0cbd3e | 2004-04-22 00:10:48 +0000 | [diff] [blame] | 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; |
bellard | 101c593 | 2005-06-05 17:11:42 +0000 | [diff] [blame] | 82 | uint32_t id_mask; |
| 83 | char id_data[1]; |
bellard | f0cbd3e | 2004-04-22 00:10:48 +0000 | [diff] [blame] | 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. |
Stefan Weil | 30daca5 | 2012-09-27 20:57:38 +0200 | [diff] [blame] | 95 | * For the error advice packets must first ensure that the |
| 96 | * packet is large enough to contain the returned ip header. |
bellard | f0cbd3e | 2004-04-22 00:10:48 +0000 | [diff] [blame] | 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 | |
Jan Kiszka | e6d43cf | 2011-07-20 12:20:18 +0200 | [diff] [blame] | 156 | void icmp_init(Slirp *slirp); |
Jan Kiszka | a68adc2 | 2012-02-29 19:14:23 +0100 | [diff] [blame] | 157 | void icmp_cleanup(Slirp *slirp); |
Blue Swirl | 6cb9c6d | 2009-07-01 19:11:17 +0000 | [diff] [blame] | 158 | void icmp_input(struct mbuf *, int); |
Yann Bordenave | de40abf | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 159 | void icmp_send_error(struct mbuf *msrc, u_char type, u_char code, int minsize, |
| 160 | const char *message); |
Blue Swirl | 6cb9c6d | 2009-07-01 19:11:17 +0000 | [diff] [blame] | 161 | void icmp_reflect(struct mbuf *); |
Jan Kiszka | e6d43cf | 2011-07-20 12:20:18 +0200 | [diff] [blame] | 162 | void icmp_receive(struct socket *so); |
| 163 | void icmp_detach(struct socket *so); |
bellard | f0cbd3e | 2004-04-22 00:10:48 +0000 | [diff] [blame] | 164 | |
| 165 | #endif |