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- /*
- ** Special compatibility definitions for linux.
- **
- ** On the linux platform, several IP-related structures have
- ** different names. Also some of the structure fields have
- ** other names, although the layout is (obviously) fixed.
- ** Several constants are not defined in the standard files.
- **
- ** @(#)linux.h e07@nikhef.nl (Eric Wassenaar) 960301
- */
-
- #if defined(linux)
-
- #include <endian.h> /* to get the proper BYTE_ORDER */
-
- #if !defined(BYTE_ORDER) || (BYTE_ORDER != BIG_ENDIAN && \
- BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != PDP_ENDIAN)
- error "Undefined or invalid BYTE_ORDER";
- #endif
-
- /*
- * Structure of an ip header, without options.
- */
-
- #define IPVERSION 4
-
- struct ip {
- #if (BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN)
- u_char ip_hl:4, /* header length */
- ip_v:4; /* version */
- #else
- u_char ip_v:4, /* version */
- ip_hl:4; /* header length */
- #endif
- u_char ip_tos; /* type of service */
- short ip_len; /* total length */
- u_short ip_id; /* identification */
- short ip_off; /* fragment offset field */
- #define IP_DF 0x4000 /* dont fragment flag */
- #define IP_MF 0x2000 /* more fragments flag */
- u_char ip_ttl; /* time to live */
- u_char ip_p; /* protocol */
- u_short ip_sum; /* checksum */
- struct in_addr ip_src,ip_dst; /* source and dest address */
- };
-
- #define IP_MAXPACKET 65535 /* maximum packet size */
-
- /*
- * 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_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
- 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
- };
-
- #define ICMP_MINLEN 8 /* abs minimum */
-
- /*
- * Definition of icmp type and code field values.
- */
-
- #define ICMP_ECHOREPLY 0 /* echo reply */
- #define ICMP_UNREACH 3 /* dest unreachable, codes: */
- #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 /* IP_DF caused drop */
- #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
- #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
- #define ICMP_REDIRECT 5 /* shorter route, codes: */
- #define ICMP_REDIRECT_NET 0 /* for network */
- #define ICMP_REDIRECT_HOST 1 /* for host */
- #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
- #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
- #define ICMP_ECHO 8 /* echo service */
- #define ICMP_TIMXCEED 11 /* time exceeded, code: */
- #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
- #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
- #define ICMP_PARAMPROB 12 /* ip header bad */
- #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 */
-
- /*
- * Definitions needed for the udp header structure.
- */
-
- #define uh_sport source
- #define uh_dport dest
- #define uh_ulen len
- #define uh_sum check
-
- #endif /* linux */
-