williamr@2: /* IP_ICMP.H williamr@2: * williamr@2: * Portions copyright (c) 1997-1999 Symbian Ltd. All rights reserved. williamr@2: */ williamr@2: williamr@2: /** @file williamr@2: @publishedAll williamr@2: @released williamr@2: */ williamr@2: williamr@2: /* williamr@2: * Copyright (c) 1982, 1986 Regents of the University of California. williamr@2: * All rights reserved. williamr@2: * williamr@2: * Redistribution and use in source and binary forms are permitted williamr@2: * provided that this notice is preserved and that due credit is given williamr@2: * to the University of California at Berkeley. The name of the University williamr@2: * may not be used to endorse or promote products derived from this williamr@2: * software without specific prior written permission. This software williamr@2: * is provided ``as is'' without express or implied warranty. williamr@2: */ williamr@2: williamr@2: /* williamr@2: * Interface Control Message Protocol Definitions. williamr@2: * Per RFC 792, September 1981. williamr@2: */ williamr@2: williamr@2: #ifndef _NETINET_IP_ICMP_H williamr@2: #define _NETINET_IP_ICMP_H williamr@2: williamr@2: #include williamr@2: #include williamr@2: #include williamr@2: williamr@2: #ifdef __cplusplus williamr@2: extern "C" { williamr@2: #endif williamr@2: williamr@2: /** williamr@2: Structure of an icmp header. williamr@2: */ williamr@2: struct icmp { williamr@2: u_char icmp_type; /* type of message, see below */ williamr@2: u_char icmp_code; /* type sub code */ williamr@2: u_short icmp_cksum; /* ones complement cksum of struct */ williamr@2: union { williamr@2: u_char ih_pptr; /* ICMP_PARAMPROB */ williamr@2: struct in_addr ih_gwaddr; /* ICMP_REDIRECT */ williamr@2: struct ih_idseq { williamr@2: n_short icd_id; williamr@2: n_short icd_seq; williamr@2: } ih_idseq; williamr@2: int ih_void; williamr@2: } icmp_hun; williamr@2: #define icmp_pptr icmp_hun.ih_pptr williamr@2: #define icmp_gwaddr icmp_hun.ih_gwaddr williamr@2: #define icmp_id icmp_hun.ih_idseq.icd_id williamr@2: #define icmp_seq icmp_hun.ih_idseq.icd_seq williamr@2: #define icmp_void icmp_hun.ih_void williamr@2: union { williamr@2: struct id_ts { williamr@2: n_time its_otime; williamr@2: n_time its_rtime; williamr@2: n_time its_ttime; williamr@2: } id_ts; williamr@2: struct id_ip { williamr@2: struct ip idi_ip; williamr@2: /* options and then 64 bits of data */ williamr@2: } id_ip; williamr@2: u_long id_mask; williamr@2: char id_data[1]; williamr@2: } icmp_dun; williamr@2: #define icmp_otime icmp_dun.id_ts.its_otime williamr@2: #define icmp_rtime icmp_dun.id_ts.its_rtime williamr@2: #define icmp_ttime icmp_dun.id_ts.its_ttime williamr@2: #define icmp_ip icmp_dun.id_ip.idi_ip williamr@2: #define icmp_mask icmp_dun.id_mask williamr@2: #define icmp_data icmp_dun.id_data williamr@2: }; williamr@2: williamr@2: /** williamr@2: Lower bounds on packet lengths for various types. williamr@2: For the error advice packets must first insure that the williamr@2: packet is large enought to contain the returned ip header. williamr@2: Only then can we do the check to see if 64 bits of packet williamr@2: data have been returned, since we need to check the returned williamr@2: ip header length. williamr@2: */ williamr@2: #define ICMP_MINLEN 8 /* abs minimum */ williamr@2: #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */ williamr@2: #define ICMP_MASKLEN 12 /* address mask */ williamr@2: #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */ williamr@2: #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8) williamr@2: /* N.B.: must separately check that ip_hl >= 5 */ williamr@2: williamr@2: /** williamr@2: Definition of type and code field values. williamr@2: */ williamr@2: #define ICMP_ECHOREPLY 0 /* echo reply */ williamr@2: #define ICMP_UNREACH 3 /* dest unreachable, codes: */ williamr@2: #define ICMP_UNREACH_NET 0 /* bad net */ williamr@2: #define ICMP_UNREACH_HOST 1 /* bad host */ williamr@2: #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */ williamr@2: #define ICMP_UNREACH_PORT 3 /* bad port */ williamr@2: #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */ williamr@2: #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */ williamr@2: #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */ williamr@2: #define ICMP_REDIRECT 5 /* shorter route, codes: */ williamr@2: #define ICMP_REDIRECT_NET 0 /* for network */ williamr@2: #define ICMP_REDIRECT_HOST 1 /* for host */ williamr@2: #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */ williamr@2: #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */ williamr@2: #define ICMP_ECHO 8 /* echo service */ williamr@2: #define ICMP_TIMXCEED 11 /* time exceeded, code: */ williamr@2: #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */ williamr@2: #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */ williamr@2: #define ICMP_PARAMPROB 12 /* ip header bad */ williamr@2: #define ICMP_TSTAMP 13 /* timestamp request */ williamr@2: #define ICMP_TSTAMPREPLY 14 /* timestamp reply */ williamr@2: #define ICMP_IREQ 15 /* information request */ williamr@2: #define ICMP_IREQREPLY 16 /* information reply */ williamr@2: #define ICMP_MASKREQ 17 /* address mask request */ williamr@2: #define ICMP_MASKREPLY 18 /* address mask reply */ williamr@2: #define ICMP_MAXTYPE 18 williamr@2: williamr@2: #define ICMP_INFOTYPE(type) \ williamr@2: ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \ williamr@2: (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \ williamr@2: (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \ williamr@2: (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY) williamr@2: williamr@2: #ifdef __cplusplus williamr@2: } williamr@2: #endif williamr@2: williamr@2: #endif /* _NETINET_IP_ICMP_H */