projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| fff51773 | 1 | /* nameser.h 4.3 85/03/27 */ |
| af0a941b RC |
2 | /* |
| 3 | * Define constants based on rfc883 | |
| 4 | */ | |
| 5 | #define PACKETSZ 512 /* maximum packet size */ | |
| 6 | #define MAXDNAME 256 /* maximum domain name */ | |
| 7 | #define MAXCDNAME 255 /* maximum compressed domain name */ | |
| 8 | #define MAXLABEL 63 /* maximum length of domain label */ | |
| 9 | /* Number of bytes of fixed size data in query structure */ | |
| 10 | #define QFIXEDSZ 4 | |
| 11 | /* number of bytes of fixed size data in resource record */ | |
| 12 | #define RRFIXEDSZ 10 | |
| 13 | ||
| 14 | #ifdef vax | |
| 15 | #define HTONS(s) (((s >> 8) & 0xff) | ((s & 0xff) << 8)) | |
| 16 | #else | |
| 17 | #define HTONS(s) | |
| 18 | #endif | |
| 19 | ||
| c789adbd RC |
20 | /* |
| 21 | * Internet nameserver port number | |
| 22 | */ | |
| 23 | #define NAMESERVER_PORT 53 | |
| 24 | ||
| af0a941b RC |
25 | /* |
| 26 | * Currently defined opcodes | |
| 27 | */ | |
| 28 | #define QUERY 0 /* standard query */ | |
| 29 | #define IQUERY 1 /* inverse query */ | |
| 30 | #define CQUERYM 2 /* completion query (multiple) */ | |
| 31 | #define CQUERYU 3 /* completion query (unique) */ | |
| 32 | /* non standard */ | |
| 33 | #define UPDATEA 11 /* add resource record */ | |
| 34 | #define UPDATED 12 /* delete resource record */ | |
| 35 | #define UPDATEM 13 /* modify resource record */ | |
| 36 | #define ZONEINIT 14 /* initial zone transfer */ | |
| 37 | #define ZONEREF 15 /* incremental zone referesh */ | |
| 38 | ||
| 39 | /* | |
| 40 | * Currently defined response codes | |
| 41 | */ | |
| 42 | #define NOERROR 0 /* no error */ | |
| 43 | #define FORMERR 1 /* format error */ | |
| 44 | #define SERVFAIL 2 /* server failure */ | |
| 45 | #define NXDOMAIN 3 /* non existent domain */ | |
| 46 | #define NOTIMP 4 /* not implemented */ | |
| 47 | #define REFUSED 5 /* query refused */ | |
| 48 | /* non standard */ | |
| 49 | #define NOCHANGE 15 /* update failed to change db */ | |
| 50 | ||
| 51 | /* | |
| 52 | * Type values for resources and queries | |
| 53 | */ | |
| 54 | #define T_A 1 /* host address */ | |
| 55 | #define T_NS 2 /* authoritative server */ | |
| 56 | #define T_MD 3 /* mail destination */ | |
| 57 | #define T_MF 4 /* mail forwarder */ | |
| 58 | #define T_CNAME 5 /* connonical name */ | |
| 59 | #define T_SOA 6 /* start of authority zone */ | |
| 60 | #define T_MB 7 /* mailbox domain name */ | |
| 61 | #define T_MG 8 /* mail group member */ | |
| 62 | #define T_MR 9 /* mail rename name */ | |
| 63 | #define T_NULL 10 /* null resource record */ | |
| 64 | #define T_WKS 11 /* well known service */ | |
| 65 | #define T_PTR 12 /* domain name pointer */ | |
| 66 | #define T_HINFO 13 /* host information */ | |
| 67 | #define T_MINFO 14 /* mailbox information */ | |
| 68 | /* non standard */ | |
| 69 | #define T_UINFO 15 /* user (finger) information */ | |
| 70 | #define T_UID 16 /* user ID */ | |
| 71 | #define T_GID 17 /* group ID */ | |
| 72 | /* Query type values which do not appear in resource records */ | |
| 73 | #define T_AXFR 252 /* transfer zone of authority */ | |
| 74 | #define T_MAILB 253 /* transfer mailbox records */ | |
| 75 | #define T_MAILA 254 /* transfer mail agent records */ | |
| 76 | #define T_ANY 255 /* wildcard match */ | |
| 77 | ||
| 78 | /* | |
| 79 | * Values for class field | |
| 80 | */ | |
| 81 | ||
| 82 | #define C_IN 1 /* the arpa internet */ | |
| 83 | #define C_CS 2 /* the computer science network */ | |
| 84 | /* Query class values which do not appear in resource records */ | |
| 85 | #define C_ANY 255 /* wildcard match */ | |
| 86 | ||
| 87 | /* | |
| 88 | * Structure for query header, the order of the fields is machine and | |
| 89 | * compiler dependent, in our case, the bits within a byte are assignd | |
| 90 | * least significant first, while the order of transmition is most | |
| 91 | * significant first. This requires a somewhat confusing rearrangement. | |
| 92 | */ | |
| 93 | ||
| 94 | typedef struct { | |
| 95 | u_short id; /* query identification number */ | |
| 96 | /* fields in third byte */ | |
| 97 | u_char rd:1; /* recursion desired */ | |
| 98 | u_char tc:1; /* truncated message */ | |
| 99 | u_char aa:1; /* authoritive answer */ | |
| 100 | u_char opcode:4; /* purpose of message */ | |
| 101 | u_char qr:1; /* response flag */ | |
| 102 | /* fields in forth byte */ | |
| 103 | u_char rcode:4; /* response code */ | |
| 104 | u_char unused:2; /* unused bits */ | |
| 105 | u_char pr:1; /* primary server required (non standard) */ | |
| 106 | u_char ra:1; /* recursion available */ | |
| 107 | /* remaining bytes */ | |
| 108 | u_short qdcount; /* number of question entries */ | |
| 109 | u_short ancount; /* number of answer entries */ | |
| 110 | u_short nscount; /* number of authority entries */ | |
| 111 | u_short arcount; /* number of resource entries */ | |
| 112 | } HEADER; | |
| 113 | ||
| 114 | /* | |
| 115 | * Defines for handling compressed domain names | |
| 116 | */ | |
| 117 | #define INDIR_MASK 0xc0 | |
| 118 | ||
| 119 | /* | |
| 120 | * Structure for passing resource records around. | |
| 121 | */ | |
| 122 | struct rrec { | |
| 123 | short r_zone; /* zone number */ | |
| 124 | short r_class; /* class number */ | |
| 125 | short r_type; /* type number */ | |
| 126 | u_long r_ttl; /* time to live */ | |
| 127 | int r_size; /* size of data area */ | |
| 128 | char *r_data; /* pointer to data */ | |
| 129 | }; | |
| fff51773 RC |
130 | |
| 131 | extern u_short getshort(); | |
| 132 | extern u_long getlong(); |