| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | #ifndef ICMP_H |
| 27 | #define ICMP_H |
| 28 | |
| 29 | /* |
| 30 | * Structure of an internet header, naked of options. |
| 31 | * |
| 32 | * We declare ip_len and ip_off to be short, rather than ushort_t |
| 33 | * pragmatically since otherwise unsigned comparisons can result |
| 34 | * against negative integers quite easily, and fail in subtle ways. |
| 35 | */ |
| 36 | struct ip { |
| 37 | unsigned char ip_hl:4, /* header length */ |
| 38 | ip_v:4; /* version */ |
| 39 | unsigned char ip_tos; /* type of service */ |
| 40 | short ip_len; /* total length */ |
| 41 | unsigned short ip_id; /* identification */ |
| 42 | short ip_off; /* fragment offset field */ |
| 43 | #define IP_DF 0x4000 /* dont fragment flag */ |
| 44 | #define IP_MF 0x2000 /* more fragments flag */ |
| 45 | unsigned char ip_ttl; /* time to live */ |
| 46 | unsigned char ip_p; /* protocol */ |
| 47 | unsigned short ip_sum; /* checksum */ |
| 48 | struct in_addr ip_src, ip_dst; /* source and dest address */ |
| 49 | }; |
| 50 | |
| 51 | /* |
| 52 | * Structure of an icmp header. |
| 53 | */ |
| 54 | struct icmp { |
| 55 | unsigned char icmp_type; /* type of message, see below */ |
| 56 | unsigned char icmp_code; /* type sub code */ |
| 57 | unsigned short icmp_cksum; /* ones complement cksum of struct */ |
| 58 | union { |
| 59 | unsigned char ih_pptr; /* ICMP_PARAMPROB */ |
| 60 | struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ |
| 61 | struct ih_idseq { |
| 62 | unsigned short icd_id; |
| 63 | unsigned short icd_seq; |
| 64 | } ih_idseq; |
| 65 | int ih_void; |
| 66 | |
| 67 | /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ |
| 68 | struct ih_pmtu { |
| 69 | unsigned short ipm_void; |
| 70 | unsigned short ipm_nextmtu; |
| 71 | } ih_pmtu; |
| 72 | |
| 73 | struct ih_rtradv { |
| 74 | unsigned char irt_num_addrs; |
| 75 | unsigned char irt_wpa; |
| 76 | unsigned short irt_lifetime; |
| 77 | } ih_rtradv; |
| 78 | } icmp_hun; |
| 79 | #define icmp_pptr icmp_hun.ih_pptr |
| 80 | #define icmp_gwaddr icmp_hun.ih_gwaddr |
| 81 | #define icmp_id icmp_hun.ih_idseq.icd_id |
| 82 | #define icmp_seq icmp_hun.ih_idseq.icd_seq |
| 83 | #define icmp_void icmp_hun.ih_void |
| 84 | #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void |
| 85 | #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu |
| 86 | union { |
| 87 | struct id_ts { |
| 88 | unsigned int its_otime; |
| 89 | unsigned int its_rtime; |
| 90 | unsigned int its_ttime; |
| 91 | } id_ts; |
| 92 | struct id_ip { |
| 93 | struct ip idi_ip; |
| 94 | /* options and then 64 bits of data */ |
| 95 | } id_ip; |
| 96 | unsigned int id_mask; |
| 97 | char id_data[1]; |
| 98 | } icmp_dun; |
| 99 | #define icmp_otime icmp_dun.id_ts.its_otime |
| 100 | #define icmp_rtime icmp_dun.id_ts.its_rtime |
| 101 | #define icmp_ttime icmp_dun.id_ts.its_ttime |
| 102 | #define icmp_ip icmp_dun.id_ip.idi_ip |
| 103 | #define icmp_mask icmp_dun.id_mask |
| 104 | #define icmp_data icmp_dun.id_data |
| 105 | }; |
| 106 | |
| 107 | #define ICMP_ECHOREPLY 0 /* echo reply */ |
| 108 | #define ICMP_ECHO 8 /* echo service */ |
| 109 | |
| 110 | /* |
| 111 | * ICMPv6 structures & constants |
| 112 | */ |
| 113 | |
| 114 | typedef struct icmp6_hdr { |
| 115 | u_char icmp6_type; /* type field */ |
| 116 | u_char icmp6_code; /* code field */ |
| 117 | u_short icmp6_cksum; /* checksum field */ |
| 118 | union { |
| 119 | u_int icmp6_un_data32[1]; /* type-specific field */ |
| 120 | u_short icmp6_un_data16[2]; /* type-specific field */ |
| 121 | u_char icmp6_un_data8[4]; /* type-specific field */ |
| 122 | } icmp6_dataun; |
| 123 | } icmp6_t; |
| 124 | |
| 125 | #define icmp6_data32 icmp6_dataun.icmp6_un_data32 |
| 126 | #define icmp6_data16 icmp6_dataun.icmp6_un_data16 |
| 127 | #define icmp6_data8 icmp6_dataun.icmp6_un_data8 |
| 128 | #define icmp6_pptr icmp6_data32[0] /* parameter prob */ |
| 129 | #define icmp6_mtu icmp6_data32[0] /* packet too big */ |
| 130 | #define icmp6_id icmp6_data16[0] /* echo request/reply */ |
| 131 | #define icmp6_seq icmp6_data16[1] /* echo request/reply */ |
| 132 | #define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */ |
| 133 | |
| 134 | struct ip6_pseudo_hdr /* for calculate the ICMPv6 checksum */ |
| 135 | { |
| 136 | struct in6_addr ip6_src; |
| 137 | struct in6_addr ip6_dst; |
| 138 | u_int ip6_plen; |
| 139 | u_int ip6_nxt; |
| 140 | }; |
| 141 | |
| 142 | #define ICMP6_ECHO_REQUEST 128 |
| 143 | #define ICMP6_ECHO_REPLY 129 |
| 144 | #define IPPROTO_ICMPV6 58 |
| 145 | #define IPV6_UNICAST_HOPS 4 /* Set/get IP unicast hop limit */ |
| 146 | |
| 147 | |
| 148 | #endif |