15 static char *servername;
16 static RR *serveraddrs;
20 char *logfile = "dnsdebug";
28 char *zonerefreshprogram;
30 void docmd(int, char**);
31 void doquery(char*, char*);
32 void preloadserveraddrs(void);
33 int prettyrrfmt(Fmt*);
35 void squirrelserveraddrs(void);
40 fprint(2, "%s: [-rx] [-f db-file] [[@server] domain [type]]\n", argv0);
45 main(int argc, char *argv[])
52 strcpy(mntpt, "/net");
57 dbfile = EARGF(usage());
63 dbfile = "/lib/ndb/external";
64 strcpy(mntpt, "/net.alt");
73 fmtinstall('R', prettyrrfmt);
78 squirrelserveraddrs();
88 for(print("> "); p = Brdline(&in, '\n'); print("> ")){
89 p[Blinelen(&in)-1] = 0;
90 n = tokenize(p, f, 3);
92 dnpurge(); /* flush the cache */
105 for(d = 0; t >= 24*60*60; t -= 24*60*60)
107 for(h = 0; t >= 60*60; t -= 60*60)
109 for(m = 0; t >= 60; t -= 60)
113 n += sprint(x, "%d day ", d);
115 n += sprint(x+n, "%d hr ", h);
117 n += sprint(x+n, "%d min ", m);
119 sprint(x+n, "%ld sec", t);
124 * convert address into a reverse lookup address
127 mkptrname(char *ip, char *rip, int rlen)
133 if(cistrstr(ip, "in-addr.arpa") || cistrstr(ip, "ip6.arpa") || parseip(a, ip) == -1)
134 snprint(rip, rlen, "%s", ip);
136 snprint(rip, rlen, "%ud.%ud.%ud.%ud.in-addr.arpa",
137 a[15], a[14], a[13], a[12]);
141 for(i = 15; i >= 0; i--){
142 p = seprint(p, e, "%ux.", a[i]&0xf);
143 p = seprint(p, e, "%ux.", a[i]>>4);
145 seprint(p, e, "ip6.arpa");
157 rp = va_arg(f->args, RR*);
159 strcpy(buf, "<null>");
164 e = buf + sizeof(buf);
165 p = seprint(p, e, "%-32.32s %-15.15s %-5.5s", rp->owner->name,
167 rrname(rp->type, buf, sizeof buf));
170 seprint(p, e, "negative rcode %d", rp->negrcode);
176 seprint(p, e, "\t%s %s", rp->cpu->name, rp->os->name);
183 seprint(p, e, "\t%s", (rp->host? rp->host->name: ""));
187 seprint(p, e, "\t%s", (rp->mb? rp->mb->name: ""));
190 seprint(p, e, "\t%s %s", (rp->mb? rp->mb->name: ""),
191 (rp->rmb? rp->rmb->name: ""));
194 seprint(p, e, "\t%lud %s", rp->pref,
195 (rp->host? rp->host->name: ""));
199 seprint(p, e, "\t%s", (rp->ip? rp->ip->name: ""));
202 seprint(p, e, "\t%s", (rp->ptr? rp->ptr->name: ""));
205 seprint(p, e, "\t%s %s %lud %lud %lud %lud %lud",
206 rp->host->name, rp->rmb->name, rp->soa->serial,
207 rp->soa->refresh, rp->soa->retry,
208 rp->soa->expire, rp->soa->minttl);
211 seprint(p, e, "\t%ud %ud %ud %s",
212 rp->srv->pri, rp->srv->weight, rp->port, rp->host->name);
215 seprint(p, e, "\t%.*H", rp->null->dlen, rp->null->data);
218 p = seprint(p, e, "\t");
219 for(t = rp->txt; t != nil; t = t->next)
220 p = seprint(p, e, "%s", t->p);
223 seprint(p, e, "\t%s %s", rp->rmb->name, rp->rp->name);
226 seprint(p, e, "\t%d %d %d", rp->key->flags, rp->key->proto,
230 seprint(p, e, "\t%d %d %d %lud %lud %lud %d %s",
231 rp->sig->type, rp->sig->alg, rp->sig->labels,
232 rp->sig->ttl, rp->sig->exp, rp->sig->incep,
233 rp->sig->tag, rp->sig->signer->name);
236 seprint(p, e, "\t%d %d %d",
237 rp->sig->type, rp->sig->tag, rp->sig->alg);
241 return fmtstrcpy(f, buf);
245 logsection(char *flag, RR *rp)
249 print("\t%s%R\n", flag, rp);
250 for(rp = rp->next; rp != nil; rp = rp->next)
251 print("\t %R\n", rp);
255 logreply(int id, uchar *addr, DNSmsg *mp)
258 char buf[12], resp[32];
260 switch(mp->flags & Rmask){
265 strcpy(resp, "Format error");
268 strcpy(resp, "Server failed");
271 strcpy(resp, "Nonexistent");
274 strcpy(resp, "Unimplemented");
277 strcpy(resp, "Refused");
280 sprint(resp, "%d", mp->flags & Rmask);
284 print("%d: rcvd %s from %I (%s%s%s%s%s)\n", id, resp, addr,
285 mp->flags & Fauth? "authoritative": "",
286 mp->flags & Ftrunc? " truncated": "",
287 mp->flags & Frecurse? " recurse": "",
288 mp->flags & Fcanrec? " can_recurse": "",
289 (mp->flags & (Fauth|Rmask)) == (Fauth|Rname)? " nx": "");
290 for(rp = mp->qd; rp != nil; rp = rp->next)
291 print("\tQ: %s %s\n", rp->owner->name,
292 rrname(rp->type, buf, sizeof buf));
293 logsection("Ans: ", mp->an);
294 logsection("Auth: ", mp->ns);
295 logsection("Hint: ", mp->ar);
299 logsend(int id, int subid, uchar *addr, char *sname, char *rname, int type)
303 print("%d.%d: sending to %I/%s %s %s\n", id, subid,
304 addr, sname, rname, rrname(type, buf, sizeof buf));
308 getdnsservers(int class)
312 if(servername == nil)
313 return dnsservers(class);
316 rr->owner = dnlookup("local#dns#servers", class, 1);
317 rr->host = idnlookup(servername, class, 1);
323 squirrelserveraddrs(void)
330 /* look up the resolver address first */
334 rrfreelist(serveraddrs);
337 rr = getdnsservers(Cin);
339 for(rp = rr; rp != nil; rp = rp->next){
340 attr = ipattr(rp->host->name);
341 v4 = strcmp(attr, "ip") == 0;
342 if(v4 || strcmp(attr, "ipv6") == 0){
343 *l = rralloc(v4? Ta: Taaaa);
344 (*l)->owner = rp->host;
349 memset(&req, 0, sizeof req);
351 req.aborttime = NS2MS(nowns) + Maxreqtm;
352 *l = dnresolve(rp->host->name, Cin, Ta, &req, nil, 0, Recurse, 0, nil);
354 *l = dnresolve(rp->host->name, Cin, Taaaa, &req,
355 nil, 0, Recurse, 0, nil);
364 preloadserveraddrs(void)
370 for(rp = serveraddrs; rp != nil; rp = rp->next){
372 rrattach(first, Authoritative);
377 setserver(char *server)
379 if(servername != nil){
384 if(server == nil || *server == 0)
386 servername = strdup(server);
387 squirrelserveraddrs();
388 if(serveraddrs == nil){
389 print("can't resolve %s\n", servername);
393 return cfg.resolver? 0: -1;
397 doquery(char *name, char *tstr)
399 int len, type, rooted;
405 preloadserveraddrs();
407 /* default to an "ip" request if alpha, "ptr" if numeric */
408 if(tstr == nil || *tstr == 0)
409 if(strcmp(ipattr(name), "ip") == 0)
417 print("!unknown type %s\n", tstr);
421 /* if name end in '.', remove it */
423 if(len > 0 && name[len-1] == '.'){
429 /* inverse queries may need to be permuted */
431 mkptrname(name, buf, sizeof buf);
433 strncpy(buf, name, sizeof buf);
435 memset(&req, 0, sizeof req);
436 getactivity(&req, 0);
438 req.aborttime = NS2MS(nowns) + Maxreqtm;
439 rr = dnresolve(buf, Cin, type, &req, nil, 0, Recurse, rooted, nil);
441 print("----------------------------\n");
442 for(rp = rr; rp; rp = rp->next)
443 print("answer %R\n", rp);
444 print("----------------------------\n");
452 docmd(int n, char **f)
461 if(setserver(f[0]+1) < 0)