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- typedef struct Ndbtuple Ndbtuple;
- enum
- {
- /* RR types */
- Ta= 1,
- Tns= 2,
- Tmd= 3,
- Tmf= 4,
- Tcname= 5,
- Tsoa= 6,
- Tmb= 7,
- Tmg= 8,
- Tmr= 9,
- Tnull= 10,
- Twks= 11,
- Tptr= 12,
- Thinfo= 13,
- Tminfo= 14,
- Tmx= 15,
- Ttxt= 16,
- Trp= 17,
- Tsig= 24,
- Tkey= 25,
- Taaaa= 28,
- Tcert= 37,
- /* query types (all RR types are also queries) */
- Tixfr= 251, /* incremental zone transfer */
- Taxfr= 252, /* zone transfer */
- Tmailb= 253, /* { Tmb, Tmg, Tmr } */
- Tall= 255, /* all records */
- /* classes */
- Csym= 0, /* internal symbols */
- Cin= 1, /* internet */
- Ccs, /* CSNET (obsolete) */
- Cch, /* Chaos net */
- Chs, /* Hesiod (?) */
- /* class queries (all class types are also queries) */
- Call= 255, /* all classes */
- /* opcodes */
- Oquery= 0<<11, /* normal query */
- Oinverse= 1<<11, /* inverse query */
- Ostatus= 2<<11, /* status request */
- Onotify= 4<<11, /* notify slaves of updates */
- Omask= 0xf<<11, /* mask for opcode */
- /* response codes */
- Rok= 0,
- Rformat= 1, /* format error */
- Rserver= 2, /* server failure (e.g. no answer from something) */
- Rname= 3, /* bad name */
- Runimplimented= 4, /* unimplemented */
- Rrefused= 5, /* we don't like you */
- Rmask= 0xf, /* mask for response */
- Rtimeout= 0x10, /* timeout sending (for internal use only) */
- /* bits in flag word (other than opcode and response) */
- Fresp= 1<<15, /* message is a response */
- Fauth= 1<<10, /* true if an authoritative response */
- Ftrunc= 1<<9, /* truncated message */
- Frecurse= 1<<8, /* request recursion */
- Fcanrec= 1<<7, /* server can recurse */
- Domlen= 256, /* max domain name length (with NULL) */
- Labellen= 256, /* max domain label length (with NULL) */
- Strlen= 256, /* max string length (with NULL) */
- Iplen= 32, /* max ascii ip address length (with NULL) */
- /* time to live values (in seconds) */
- Min= 60,
- Hour= 60*Min, /* */
- Day= 24*Hour, /* Ta, Tmx */
- Week= 7*Day, /* Tsoa, Tns */
- Year= 52*Week,
- DEFTTL= Day,
- /* reserved time (can't be timed out earlier) */
- Reserved= 5*Min,
- /* packet header sizes */
- Maxudp= 512, /* maximum bytes per udp message */
- Maxudpin= 2048, /* maximum bytes per udp message */
- /* length of domain name hash table */
- HTLEN= 4*1024,
- RRmagic= 0xdeadbabe,
- DNmagic= 0xa110a110,
- /* parallelism */
- Maxactive= 32,
- };
- typedef struct DN DN;
- typedef struct DNSmsg DNSmsg;
- typedef struct RR RR;
- typedef struct SOA SOA;
- typedef struct Area Area;
- typedef struct Request Request;
- typedef struct Key Key;
- typedef struct Cert Cert;
- typedef struct Sig Sig;
- typedef struct Null Null;
- typedef struct Server Server;
- typedef struct Txt Txt;
- /*
- * a structure to track a request and any slave process handling it
- */
- struct Request
- {
- int isslave; /* pid of slave */
- ulong aborttime; /* time at which we give up */
- jmp_buf mret; /* where master jumps to after starting a slave */
- int id;
- };
- /*
- * a domain name
- */
- struct DN
- {
- int magic;
- DN *next; /* hash collision list */
- char *name; /* owner */
- RR *rr; /* resource records off this name */
- ulong referenced; /* time last referenced */
- ulong lookuptime; /* last time we tried to get a better value */
- ushort class; /* RR class */
- char refs; /* for mark and sweep */
- char nonexistent; /* true if we get an authoritative nx for this domain */
- ulong ordinal;
- };
- /*
- * security info
- */
- struct Key
- {
- int flags;
- int proto;
- int alg;
- int dlen;
- uchar *data;
- };
- struct Cert
- {
- int type;
- int tag;
- int alg;
- int dlen;
- uchar *data;
- };
- struct Sig
- {
- int type;
- int alg;
- int labels;
- ulong ttl;
- ulong exp;
- ulong incep;
- int tag;
- DN *signer;
- int dlen;
- uchar *data;
- };
- struct Null
- {
- int dlen;
- uchar *data;
- };
- /*
- * text strings
- */
- struct Txt
- {
- Txt *next;
- char *p;
- };
- /*
- * an unpacked resource record
- */
- struct RR
- {
- int magic;
- RR *next;
- DN *owner; /* domain that owns this resource record */
- uchar negative; /* this is a cached negative response */
- ulong pc;
- ulong ttl; /* time to live to be passed on */
- ulong expire; /* time this entry expires locally */
- ushort type; /* RR type */
- ushort query; /* query tyis is in response to */
- uchar auth; /* authoritative */
- uchar db; /* from database */
- uchar cached; /* rr in cache */
- ulong marker; /* used locally when scanning rrlists */
- union {
- DN *negsoaowner; /* soa for cached negative response */
- DN *host; /* hostname - soa, cname, mb, md, mf, mx, ns */
- DN *cpu; /* cpu type - hinfo */
- DN *mb; /* mailbox - mg, minfo */
- DN *ip; /* ip addrss - a */
- DN *rp; /* rp arg - rp */
- int cruftlen;
- ulong arg0;
- };
- union {
- int negrcode; /* response code for cached negative response */
- DN *rmb; /* responsible maibox - minfo, soa, rp */
- DN *ptr; /* pointer to domain name - ptr */
- DN *os; /* operating system - hinfo */
- ulong pref; /* preference value - mx */
- ulong local; /* ns served from local database - ns */
- ulong arg1;
- };
- union {
- SOA *soa; /* soa timers - soa */
- Key *key;
- Cert *cert;
- Sig *sig;
- Null *null;
- Txt *txt;
- };
- };
- /*
- * list of servers
- */
- struct Server
- {
- Server *next;
- char *name;
- };
- /*
- * timers for a start of authenticated record
- */
- struct SOA
- {
- ulong serial; /* zone serial # (sec) - soa */
- ulong refresh; /* zone refresh interval (sec) - soa */
- ulong retry; /* zone retry interval (sec) - soa */
- ulong expire; /* time to expiration (sec) - soa */
- ulong minttl; /* minimum time to live for any entry (sec) - soa */
- Server *slaves; /* slave servers */
- };
- /*
- * domain messages
- */
- struct DNSmsg
- {
- ushort id;
- int flags;
- int qdcount; /* questions */
- RR *qd;
- int ancount; /* answers */
- RR *an;
- int nscount; /* name servers */
- RR *ns;
- int arcount; /* hints */
- RR *ar;
- };
- /*
- * definition of local area for dblookup
- */
- struct Area
- {
- Area *next;
- int len; /* strlen(area->soarr->owner->name) */
- RR *soarr; /* soa defining this area */
- int neednotify;
- int needrefresh;
- };
- enum
- {
- Recurse,
- Dontrecurse,
- NOneg,
- OKneg,
- };
- /* dn.c */
- extern char *rrtname[];
- extern char *rname[];
- extern char *opname[];
- extern void db2cache(int);
- extern void dninit(void);
- extern DN* dnlookup(char*, int, int);
- extern void dnage(DN*);
- extern void dnageall(int);
- extern void dnagedb(void);
- extern void dnauthdb(void);
- extern void dnget(void);
- extern void dnpurge(void);
- extern void dnput(void);
- extern Area* inmyarea(char*);
- extern void rrattach(RR*, int);
- extern RR* rralloc(int);
- extern void rrfree(RR*);
- extern void rrfreelist(RR*);
- extern RR* rrlookup(DN*, int, int);
- extern RR* rrcat(RR**, RR*);
- extern RR** rrcopy(RR*, RR**);
- extern RR* rrremneg(RR**);
- extern RR* rrremtype(RR**, int);
- extern int rrfmt(Fmt*);
- extern int rravfmt(Fmt*);
- extern int rrsupported(int);
- extern int rrtype(char*);
- extern char* rrname(int, char*, int);
- extern int tsame(int, int);
- extern void dndump(char*);
- extern int getactivity(Request*);
- extern void putactivity(void);
- extern void abort(); /* char*, ... */;
- extern void warning(char*, ...);
- extern void slave(Request*);
- extern void dncheck(void*, int);
- extern void unique(RR*);
- extern int subsume(char*, char*);
- extern RR* randomize(RR*);
- extern void* emalloc(int);
- extern char* estrdup(char*);
- extern void dnptr(uchar*, uchar*, char*, int, int);
- extern void addserver(Server**, char*);
- extern Server* copyserverlist(Server*);
- extern void freeserverlist(Server*);
- /* dnarea.c */
- extern void refresh_areas(Area*);
- extern void freearea(Area**);
- extern void addarea(DN *dp, RR *rp, Ndbtuple *t);
- /* dblookup.c */
- extern RR* dblookup(char*, int, int, int, int);
- extern RR* dbinaddr(DN*, int);
- extern int baddelegation(RR*, RR*, uchar*);
- extern RR* dnsservers(int);
- extern RR* domainlist(int);
- extern int opendatabase(void);
- /* dns.c */
- extern char* walkup(char*);
- extern RR* getdnsservers(int);
- extern void logreply(int, uchar*, DNSmsg*);
- extern void logsend(int, int, uchar*, char*, char*, int);
- /* dnresolve.c */
- extern RR* dnresolve(char*, int, int, Request*, RR**, int, int, int, int*);
- extern int udpport(void);
- extern int mkreq(DN *dp, int type, uchar *buf, int flags, ushort reqno);
- /* dnserver.c */
- extern void dnserver(DNSmsg*, DNSmsg*, Request*);
- extern void dnudpserver(char*);
- extern void dntcpserver(char*);
- /* dnnotify.c */
- extern void dnnotify(DNSmsg*, DNSmsg*, Request*);
- extern void notifyproc(void);
- /* convDNS2M.c */
- extern int convDNS2M(DNSmsg*, uchar*, int);
- /* convM2DNS.c */
- extern char* convM2DNS(uchar*, int, DNSmsg*);
- /* malloc.c */
- extern void mallocsanity(void*);
- extern void lasthist(void*, int, ulong);
- extern int debug;
- extern int traceactivity;
- extern char *trace;
- extern int testing; /* test cache whenever removing a DN */
- extern int cachedb;
- extern int needrefresh;
- extern char *dbfile;
- extern char mntpt[];
- extern char *logfile;
- extern int resolver;
- extern int maxage; /* age of oldest entry in cache (secs) */
- extern char *zonerefreshprogram;
- extern int sendnotifies;
- extern ulong now; /* time base */
- extern Area *owned;
- extern Area *delegated;
- #pragma varargck type "R" RR*
- #pragma varargck type "Q" RR*
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