| /* |
| * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #ifndef ICMP_H |
| #define ICMP_H |
| |
| /* |
| * Structure of an internet header, naked of options. |
| * |
| * We declare ip_len and ip_off to be short, rather than ushort_t |
| * pragmatically since otherwise unsigned comparisons can result |
| * against negative integers quite easily, and fail in subtle ways. |
| */ |
| struct ip { |
| unsigned char ip_hl:4, /* header length */ |
| ip_v:4; /* version */ |
| unsigned char ip_tos; /* type of service */ |
| short ip_len; /* total length */ |
| unsigned short ip_id; /* identification */ |
| short ip_off; /* fragment offset field */ |
| #define IP_DF 0x4000 /* dont fragment flag */ |
| #define IP_MF 0x2000 /* more fragments flag */ |
| unsigned char ip_ttl; /* time to live */ |
| unsigned char ip_p; /* protocol */ |
| unsigned short ip_sum; /* checksum */ |
| struct in_addr ip_src, ip_dst; /* source and dest address */ |
| }; |
| |
| /* |
| * Structure of an icmp header. |
| */ |
| struct icmp { |
| unsigned char icmp_type; /* type of message, see below */ |
| unsigned char icmp_code; /* type sub code */ |
| unsigned short icmp_cksum; /* ones complement cksum of struct */ |
| union { |
| unsigned char ih_pptr; /* ICMP_PARAMPROB */ |
| struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ |
| struct ih_idseq { |
| unsigned short icd_id; |
| unsigned short icd_seq; |
| } ih_idseq; |
| int ih_void; |
| |
| /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ |
| struct ih_pmtu { |
| unsigned short ipm_void; |
| unsigned short ipm_nextmtu; |
| } ih_pmtu; |
| |
| struct ih_rtradv { |
| unsigned char irt_num_addrs; |
| unsigned char irt_wpa; |
| unsigned short irt_lifetime; |
| } ih_rtradv; |
| } icmp_hun; |
| #define icmp_pptr icmp_hun.ih_pptr |
| #define icmp_gwaddr icmp_hun.ih_gwaddr |
| #define icmp_id icmp_hun.ih_idseq.icd_id |
| #define icmp_seq icmp_hun.ih_idseq.icd_seq |
| #define icmp_void icmp_hun.ih_void |
| #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void |
| #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu |
| union { |
| struct id_ts { |
| unsigned int its_otime; |
| unsigned int its_rtime; |
| unsigned int its_ttime; |
| } id_ts; |
| struct id_ip { |
| struct ip idi_ip; |
| /* options and then 64 bits of data */ |
| } id_ip; |
| unsigned int id_mask; |
| char id_data[1]; |
| } icmp_dun; |
| #define icmp_otime icmp_dun.id_ts.its_otime |
| #define icmp_rtime icmp_dun.id_ts.its_rtime |
| #define icmp_ttime icmp_dun.id_ts.its_ttime |
| #define icmp_ip icmp_dun.id_ip.idi_ip |
| #define icmp_mask icmp_dun.id_mask |
| #define icmp_data icmp_dun.id_data |
| }; |
| |
| #define ICMP_ECHOREPLY 0 /* echo reply */ |
| #define ICMP_ECHO 8 /* echo service */ |
| |
| /* |
| * ICMPv6 structures & constants |
| */ |
| |
| typedef struct icmp6_hdr { |
| u_char icmp6_type; /* type field */ |
| u_char icmp6_code; /* code field */ |
| u_short icmp6_cksum; /* checksum field */ |
| union { |
| u_int icmp6_un_data32[1]; /* type-specific field */ |
| u_short icmp6_un_data16[2]; /* type-specific field */ |
| u_char icmp6_un_data8[4]; /* type-specific field */ |
| } icmp6_dataun; |
| } icmp6_t; |
| |
| #define icmp6_data32 icmp6_dataun.icmp6_un_data32 |
| #define icmp6_data16 icmp6_dataun.icmp6_un_data16 |
| #define icmp6_data8 icmp6_dataun.icmp6_un_data8 |
| #define icmp6_pptr icmp6_data32[0] /* parameter prob */ |
| #define icmp6_mtu icmp6_data32[0] /* packet too big */ |
| #define icmp6_id icmp6_data16[0] /* echo request/reply */ |
| #define icmp6_seq icmp6_data16[1] /* echo request/reply */ |
| #define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */ |
| |
| struct ip6_pseudo_hdr /* for calculate the ICMPv6 checksum */ |
| { |
| struct in6_addr ip6_src; |
| struct in6_addr ip6_dst; |
| u_int ip6_plen; |
| u_int ip6_nxt; |
| }; |
| |
| #define ICMP6_ECHO_REQUEST 128 |
| #define ICMP6_ECHO_REPLY 129 |
| #define IPPROTO_ICMPV6 58 |
| #define IPV6_UNICAST_HOPS 4 /* Set/get IP unicast hop limit */ |
| |
| |
| #endif |
