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- #ifndef __netinet_ip_icmp_h
- #define __netinet_ip_icmp_h
-
- /* Freenet programmers interface - netinet/ip_icmp.h - 23/5/95 */
-
- #include "sys/types.h"
- #include "netinet/ip.h"
- #include "netinet/in.h"
- #include "netinet/in_systm.h"
-
- /*
- * Interface Control Message Protocol Definitions.
- * Per RFC 792, September 1981.
- */
-
- /*
- * Structure of an icmp header.
- */
- struct icmp {
- u_char icmp_type; /* type of message, see below */
- u_char icmp_code; /* type sub code */
- u_short icmp_cksum; /* ones complement cksum of struct */
- union {
- u_char ih_pptr; /* ICMP_PARAMPROB */
- struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
- struct ih_idseq {
- n_short icd_id;
- n_short icd_seq;
- } ih_idseq;
- int ih_void;
-
- /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
- struct ih_pmtu {
- n_short ipm_void;
- n_short ipm_nextmtu;
- } ih_pmtu;
- } 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 {
- n_time its_otime;
- n_time its_rtime;
- n_time its_ttime;
- } id_ts;
- struct id_ip {
- struct ip idi_ip;
- /* options and then 64 bits of data */
- } id_ip;
- u_long 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
- };
-
- /*
- * Minimum ICMP packet size
- */
- #define ICMP_MINLEN 8
- #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
- #define ICMP_MASKLEN 12 /* address mask */
- #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
- #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
-
- /*
- * Values for type and code fields
- */
- #define ICMP_ECHOREPLY 0 /* Echo reply */
- #define ICMP_UNREACH 3 /* Destination unreachable */
- #define ICMP_UNREACH_NET 0 /* Bad net */
- #define ICMP_UNREACH_HOST 1 /* Bad host */
- #define ICMP_UNREACH_PROTOCOL 2 /* Bad protocol */
- #define ICMP_UNREACH_PORT 3 /* Bad port */
- #define ICMP_UNREACH_NEEDFRAG 4 /* Fragmentation needed */
- #define ICMP_UNREACH_SRCFAIL 5 /* Source route failed */
- #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
- #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
- #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
- #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */
- #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
- #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
- #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
- #define ICMP_SOURCEQUENCH 4 /* Source quench */
- #define ICMP_REDIRECT 5 /* Redirection advice */
- #define ICMP_REDIRECT_NET 0 /* For network */
- #define ICMP_REDIRECT_HOST 1 /* For host */
- #define ICMP_REDIRECT_TOSNET 2 /* For network and TOS */
- #define ICMP_REDIRECT_TOSHOST 3 /* For host and TOS */
- #define ICMP_ECHO 8 /* Echo request */
- #define ICMP_ROUTERADVERT 9 /* router advertisement */
- #define ICMP_ROUTERSOLICIT 10 /* router solicitation */
- #define ICMP_TIMXCEED 11 /* Time exceeded */
- #define ICMP_TIMXCEED_INTRANS 0 /* TTL exceeded */
- #define ICMP_TIMXCEED_REASS 1 /* Reassembly timed out */
- #define ICMP_PARAMPROB 12 /* Parameter problem */
- #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
- #define ICMP_TSTAMP 13 /* Timestamp request */
- #define ICMP_TSTAMPREPLY 14 /* Timestamp reply */
- #define ICMP_IREQ 15 /* Information request */
- #define ICMP_IREQREPLY 16 /* Information reply */
- #define ICMP_MASKREQ 17 /* Address mask request */
- #define ICMP_MASKREPLY 18 /* Address mask reply */
-
- #define ICMP_MAXTYPE 18
-
- #define ICMP_INFOTYPE(type) \
- ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
- (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
- (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
- (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
- (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
-
- #endif
-