projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 84cfda75 C |
1 | /* ns.h 4.3 86/06/04 */ |
| 2 | ||
| 3 | /* | |
| 4 | * Copyright (c) 1985 Regents of the University of California | |
| 5 | * All Rights Reserved | |
| 6 | */ | |
| 7 | ||
| 8 | /* | |
| 9 | * Global definitions and variables for the name server. | |
| 10 | */ | |
| 11 | ||
| 12 | #include <strings.h> | |
| 13 | #include <arpa/inet.h> | |
| 14 | ||
| 15 | /* MAXRETRY * RETRYTIME * #ns should be less than 1 minute or so */ | |
| 16 | /* 3 * 8 * 3 = 72 seconds for 3 root domain servers */ | |
| 17 | #define MAXNS 10 /* max number of NS's to try */ | |
| 18 | #define RETRYTIME 8 /* time between retries */ | |
| 19 | #define MAXRETRY 3 /* max number of retries per addr */ | |
| 20 | #define MAXCNAMES 8 /* max # of CNAMES tried per addr */ | |
| 21 | ||
| 22 | #define MAXZONES 32 | |
| 23 | ||
| 24 | struct zoneinfo { | |
| 25 | int z_type; /* type of zone */ | |
| 26 | char *z_origin; /* root domain name of zone */ | |
| 27 | time_t z_time; /* time left before refresh */ | |
| 28 | u_long z_refresh; /* refresh interval */ | |
| 29 | u_long z_retry; /* refresh retry interval */ | |
| 30 | u_long z_expire; /* expiriation time for cached info */ | |
| 31 | u_long z_minimum; /* minimum TTL value */ | |
| 32 | u_long z_serial; /* changes if zone modified */ | |
| 33 | char *z_source; /* source location of data */ | |
| 34 | int z_addrcnt; /* address count */ | |
| 35 | struct in_addr z_addr[MAXNS]; /* list of master servers for zone */ | |
| 36 | }; | |
| 37 | ||
| 38 | /* zone types (z_type) */ | |
| 39 | #define Z_PRIMARY 1 | |
| 40 | #define Z_SECONDARY 2 | |
| 41 | #define Z_CACHE 3 | |
| 42 | #define Z_DOMAIN 4 | |
| 43 | ||
| 44 | /* Flags to ns_req() */ | |
| 45 | #define ISTCP 01 | |
| 46 | #define ISLOCAL 02 | |
| 47 | ||
| 48 | /* | |
| 49 | * Structure for recording info on forwarded queries. | |
| 50 | */ | |
| 51 | struct qinfo { | |
| 52 | u_short q_id; /* id of query */ | |
| 53 | u_short q_nsid; /* id of forwarded query */ | |
| 54 | struct sockaddr_in q_from; /* requestor's address */ | |
| 55 | char *q_msg; /* the message */ | |
| 56 | int q_msglen; /* len of message */ | |
| 57 | int q_naddr; /* number of addr's in q_addr */ | |
| 58 | int q_curaddr; /* last addr sent to */ | |
| 59 | time_t q_time; /* time to retry */ | |
| 60 | struct qinfo *q_next; /* rexmit list (sorted by time) */ | |
| 61 | struct qinfo *q_link; /* storage list (random order) */ | |
| 62 | struct sockaddr_in q_addr[MAXNS]; /* addresses of NS's */ | |
| 63 | int q_nretry[MAXNS]; /* # of times addr retried */ | |
| 64 | int q_cname; /* # of cnames found */ | |
| 65 | char *q_cmsg; /* the cname message */ | |
| 66 | int q_cmsglen; /* len of cname message */ | |
| 67 | struct qstream *q_stream; /* TCP stream, null if UDP */ | |
| 68 | }; | |
| 69 | ||
| 70 | #define QINFO_NULL ((struct qinfo *)0) | |
| 71 | extern struct qinfo *qfindid(); | |
| 72 | extern struct qinfo *qnew(); | |
| 73 | extern struct qinfo *retryqp; /* next query to retry */ | |
| 74 | ||
| 75 | struct qstream { | |
| 76 | int s_rfd; /* stream file descriptor */ | |
| 77 | int s_size; /* expected amount of data to recive */ | |
| 78 | int s_bufsize; /* amount of data recived in s_buf */ | |
| 79 | char *s_buf; /* buffer of recived data */ | |
| 80 | char *s_bufp; /* pointer into s_buf of recived data */ | |
| 81 | struct qstream *s_next; /* next stream */ | |
| 82 | struct sockaddr_in s_from; /* address query came from */ | |
| 83 | u_long s_time; /* time stamp of last transaction */ | |
| 84 | int s_refcnt; /* number of outstanding queries */ | |
| 85 | u_short s_tempsize; /* temporary for size from net */ | |
| 86 | }; | |
| 87 | ||
| 88 | #define QSTREAM_NULL ((struct qstream *)0) | |
| 89 | extern struct qstream *streamq; /* stream queue */ | |
| 90 | ||
| 91 | #ifdef DEBUG | |
| 92 | extern int debug; /* debug flag */ | |
| 93 | extern FILE *ddt; /* debug file discriptor */ | |
| 94 | #endif | |
| 95 | extern int ds; /* datagram socket */ | |
| 96 | extern struct timeval tt; /* place to store time */ | |
| 97 | ||
| 98 | extern struct itimerval ival; /* maintenance interval */ | |
| 99 | extern struct zoneinfo zones[MAXZONES]; /* zone information */ | |
| 100 | extern int nzones; /* number of zones in use */ | |
| 101 | ||
| 102 | #ifdef vax | |
| 103 | extern u_short htons(), ntohs(); | |
| 104 | extern u_long htonl(), ntohl(); | |
| 105 | #endif |