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134 lines
3.9 KiB
C
134 lines
3.9 KiB
C
/*
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** Special compatibility definitions for linux.
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**
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** On the linux platform, several IP-related structures have
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** different names. Also some of the structure fields have
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** other names, although the layout is (obviously) fixed.
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** Several constants are not defined in the standard files.
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**
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** @(#)linux.h e07@nikhef.nl (Eric Wassenaar) 960301
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*/
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#if defined(linux)
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#include <endian.h> /* to get the proper BYTE_ORDER */
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#if !defined(BYTE_ORDER) || (BYTE_ORDER != BIG_ENDIAN && \
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BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != PDP_ENDIAN)
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error "Undefined or invalid BYTE_ORDER";
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#endif
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/*
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* Structure of an ip header, without options.
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*/
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#define IPVERSION 4
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struct ip {
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#if (BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN)
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u_char ip_hl:4, /* header length */
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ip_v:4; /* version */
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#else
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u_char ip_v:4, /* version */
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ip_hl:4; /* header length */
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#endif
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u_char ip_tos; /* type of service */
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short ip_len; /* total length */
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u_short ip_id; /* identification */
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short ip_off; /* fragment offset field */
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#define IP_DF 0x4000 /* dont fragment flag */
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#define IP_MF 0x2000 /* more fragments flag */
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u_char ip_ttl; /* time to live */
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u_char ip_p; /* protocol */
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u_short ip_sum; /* checksum */
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struct in_addr ip_src,ip_dst; /* source and dest address */
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};
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#define IP_MAXPACKET 65535 /* maximum packet size */
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/*
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* Structure of an icmp header.
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*/
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struct icmp {
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u_char icmp_type; /* type of message, see below */
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u_char icmp_code; /* type sub code */
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u_short icmp_cksum; /* ones complement cksum of struct */
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union {
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u_char ih_pptr; /* ICMP_PARAMPROB */
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struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
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struct ih_idseq {
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n_short icd_id;
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n_short icd_seq;
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} ih_idseq;
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int ih_void;
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} icmp_hun;
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#define icmp_pptr icmp_hun.ih_pptr
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#define icmp_gwaddr icmp_hun.ih_gwaddr
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#define icmp_id icmp_hun.ih_idseq.icd_id
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#define icmp_seq icmp_hun.ih_idseq.icd_seq
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#define icmp_void icmp_hun.ih_void
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union {
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struct id_ts {
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n_time its_otime;
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n_time its_rtime;
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n_time its_ttime;
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} id_ts;
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struct id_ip {
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struct ip idi_ip;
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/* options and then 64 bits of data */
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} id_ip;
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u_long id_mask;
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char id_data[1];
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} icmp_dun;
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#define icmp_otime icmp_dun.id_ts.its_otime
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#define icmp_rtime icmp_dun.id_ts.its_rtime
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#define icmp_ttime icmp_dun.id_ts.its_ttime
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#define icmp_ip icmp_dun.id_ip.idi_ip
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#define icmp_mask icmp_dun.id_mask
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#define icmp_data icmp_dun.id_data
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};
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#define ICMP_MINLEN 8 /* abs minimum */
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/*
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* Definition of icmp type and code field values.
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*/
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#define ICMP_ECHOREPLY 0 /* echo reply */
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#define ICMP_UNREACH 3 /* dest unreachable, codes: */
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#define ICMP_UNREACH_NET 0 /* bad net */
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#define ICMP_UNREACH_HOST 1 /* bad host */
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#define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
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#define ICMP_UNREACH_PORT 3 /* bad port */
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#define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
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#define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
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#define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
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#define ICMP_REDIRECT 5 /* shorter route, codes: */
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#define ICMP_REDIRECT_NET 0 /* for network */
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#define ICMP_REDIRECT_HOST 1 /* for host */
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#define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
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#define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
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#define ICMP_ECHO 8 /* echo service */
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#define ICMP_TIMXCEED 11 /* time exceeded, code: */
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#define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
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#define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
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#define ICMP_PARAMPROB 12 /* ip header bad */
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#define ICMP_TSTAMP 13 /* timestamp request */
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#define ICMP_TSTAMPREPLY 14 /* timestamp reply */
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#define ICMP_IREQ 15 /* information request */
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#define ICMP_IREQREPLY 16 /* information reply */
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#define ICMP_MASKREQ 17 /* address mask request */
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#define ICMP_MASKREPLY 18 /* address mask reply */
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/*
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* Definitions needed for the udp header structure.
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*/
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#define uh_sport source
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#define uh_dport dest
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#define uh_ulen len
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#define uh_sum check
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#endif /* linux */
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