projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 53a5409e | 1 | /* ip.h 1.7 81/11/14 */ |
| 6e8b2eca | 2 | |
| dad64fdf BJ |
3 | /* |
| 4 | * Definitions for internet protocol version 4. | |
| 5 | * Per RFC 791, September 1981. | |
| 6 | */ | |
| 7 | #define IPVERSION 4 | |
| 8 | ||
| 9 | /* | |
| 10 | * Structure of an internet header, naked of options. | |
| 11 | * | |
| 53a5409e BJ |
12 | * We declare ip_len and ip_off to be short, rather than u_short |
| 13 | * pragmatically since otherwise unsigned comparisons can result | |
| 14 | * against negative integers quite easily, and fail in subtle ways. | |
| dad64fdf | 15 | */ |
| 6e8b2eca BJ |
16 | struct ip { |
| 17 | u_char ip_hl:4, /* header length */ | |
| 18 | ip_v:4; /* version */ | |
| 19 | u_char ip_tos; /* type of service */ | |
| 82422b42 | 20 | short ip_len; /* total length */ |
| 6e8b2eca | 21 | u_short ip_id; /* identification */ |
| 82422b42 | 22 | short ip_off; /* fragment offset field */ |
| dad64fdf BJ |
23 | #define IP_DF 0x4000 /* dont fragment flag */ |
| 24 | #define IP_MF 0x2000 /* more fragments flag */ | |
| 6e8b2eca BJ |
25 | u_char ip_ttl; /* time to live */ |
| 26 | u_char ip_p; /* protocol */ | |
| 27 | u_short ip_sum; /* checksum */ | |
| 53a5409e | 28 | struct ip_addr ip_src,ip_dst; /* source and dest address */ |
| 0fcb2ae6 BJ |
29 | }; |
| 30 | ||
| 6e8b2eca | 31 | /* |
| dad64fdf BJ |
32 | * Definitions for options. |
| 33 | */ | |
| 34 | #define IPOPT_COPIED(o) ((o)&0x80) | |
| 35 | #define IPOPT_CLASS(o) ((o)&0x40) | |
| 36 | #define IPOPT_NUMBER(o) ((o)&0x3f) | |
| 37 | ||
| 38 | #define IPOPT_CONTROL 0x00 | |
| 39 | #define IPOPT_RESERVED1 0x10 | |
| 40 | #define IPOPT_DEBMEAS 0x20 | |
| 41 | #define IPOPT_RESERVED2 0x30 | |
| 42 | ||
| 43 | #define IPOPT_EOL 0 /* end of option list */ | |
| 44 | #define IPOPT_NOP 1 /* no operation */ | |
| 45 | ||
| 46 | #define IPOPT_RR 7 /* record packet route */ | |
| 47 | #define IPOPT_TS 68 /* timestamp */ | |
| 48 | #define IPOPT_SECURITY 130 /* provide s,c,h,tcc */ | |
| 49 | #define IPOPT_LSRR 131 /* loose source route */ | |
| 50 | #define IPOPT_SATID 136 /* satnet id */ | |
| 51 | #define IPOPT_SSRR 137 /* strict source route */ | |
| 52 | ||
| 53 | /* | |
| 54 | * Time stamp option structure. | |
| 55 | */ | |
| 56 | struct ip_timestamp { | |
| 57 | u_char ipt_code; /* IPOPT_TS */ | |
| 58 | u_char ipt_len; /* size of structure (variable) */ | |
| 59 | u_char ipt_ptr; /* index of current entry */ | |
| 60 | u_char ipt_flg:4, /* flags, see below */ | |
| 61 | ipt_oflw:4; /* overflow counter */ | |
| 62 | union { | |
| 63 | n_long ipt_time[1]; | |
| 64 | struct ipt_ta { | |
| d52566dd | 65 | struct ip_addr ipt_addr; |
| dad64fdf BJ |
66 | n_long ipt_time; |
| 67 | } ipt_ta[1]; | |
| 68 | } | |
| 69 | }; | |
| 70 | ||
| 71 | /* flag bits for ipt_flg */ | |
| 72 | #define IPOPT_TS_TSONLY 0 /* timestamps only */ | |
| 73 | #define IPOPT_TS_TSANDADDR 1 /* timestamps and addresses */ | |
| 74 | #define IPOPT_TS_PRESPEC 2 /* specified modules only */ | |
| 75 | ||
| 76 | /* bits for security (not byte swapped) */ | |
| 77 | #define IPOPT_SECUR_UNCLASS 0x0000 | |
| 78 | #define IPOPT_SECUR_CONFID 0xf135 | |
| 79 | #define IPOPT_SECUR_EFTO 0x789a | |
| 80 | #define IPOPT_SECUR_MMMM 0xbc4d | |
| 81 | #define IPOPT_SECUR_RESTR 0xaf13 | |
| 82 | #define IPOPT_SECUR_SECRET 0xd788 | |
| 83 | #define IPOPT_SECUR_TOPSECRET 0x6bc5 | |
| 84 | ||
| dad64fdf BJ |
85 | /* |
| 86 | * Internet implementation parameters. | |
| 87 | */ | |
| 6e8b2eca | 88 | #define MAXTTL 255 /* maximum time to live (seconds) */ |
| dad64fdf | 89 | #define IPFRAGTTL 15 /* time to live for frag chains */ |