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Annotation of 43BSD/etc/named/ns.h, revision 1.1

1.1     ! root        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

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