3 * - RR-type-specific code, and the machinery to call it
6 * This file is part of adns, which is Copyright (C) 1997, 1998 Ian Jackson
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software Foundation,
20 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 #include <arpa/inet.h>
30 #define R_NOMEM return adns_s_nolocalmem
31 #define CSP_ADDSTR(s) if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; else;
36 * _textdata, _qstring (csp)
42 * _addr (pa,di,csp,cs)
45 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs)
48 * _inthostaddr (mf,cs)
51 * within each section:
63 * _textdata, _qstring (csp)
66 static adns_status csp_textdata(vbuf *vb, const char *dp, int len) {
72 for (cn=0; cn<len; cn++) {
74 if (ch >= 32 && ch <= 126 && ch != '"' && ch != '\\') {
75 if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM;
77 sprintf(buf,"\\%02x",ch);
86 static adns_status csp_qstring(vbuf *vb, const char *dp) {
87 return csp_textdata(vb, dp, strlen(dp));
94 static void mf_str(adns_query qu, void *datap) {
97 adns__makefinal_str(qu,rrp);
100 static adns_status cs_str(vbuf *vb, const void *datap) {
101 const char *const *rrp= datap;
103 return csp_qstring(vb,*rrp);
110 static void mf_intstr(adns_query qu, void *datap) {
111 adns_rr_intstr *rrp= datap;
113 adns__makefinal_str(qu,&rrp->str);
116 static adns_status cs_intstr(vbuf *vb, const void *datap) {
117 const adns_rr_intstr *rrp= datap;
120 sprintf(buf,"%u ",rrp->i);
122 return csp_qstring(vb,rrp->str);
129 static void mf_manyistr(adns_query qu, void *datap) {
130 adns_rr_intstr **rrp= datap;
131 adns_rr_intstr *te, *table;
135 for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
137 adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
139 for (te= *rrp; te->i >= 0; te++)
140 adns__makefinal_str(qu,&te->str);
143 static adns_status cs_manyistr(vbuf *vb, const void *datap) {
144 const adns_rr_intstr *const *rrp= datap;
145 const adns_rr_intstr *current;
149 for (spc=0, current= *rrp; current->i >= 0; current++) {
150 if (spc) CSP_ADDSTR(" ");
151 st= csp_textdata(vb,current->str,current->i); if (st) return st;
160 static adns_status pa_txt(const parseinfo *pai, int cbyte, int max, void *datap) {
161 adns_rr_intstr **rrp= datap, *table, *te;
162 const byte *dgram= pai->dgram;
163 int ti, tc, l, startbyte;
166 if (cbyte >= max) return adns_s_invaliddata;
168 while (cbyte < max) {
172 if (cbyte != max) return adns_s_invaliddata;
174 table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1));
177 for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
179 te->str= adns__alloc_interim(pai->qu, l+1);
180 if (!te->str) R_NOMEM;
182 memcpy(te->str,dgram+cbyte,l);
185 assert(cbyte == max);
195 * _inaddr (pa,dip,di)
198 static adns_status pa_inaddr(const parseinfo *pai, int cbyte, int max, void *datap) {
199 struct in_addr *storeto= datap;
201 if (max-cbyte != 4) return adns_s_invaliddata;
202 memcpy(storeto, pai->dgram + cbyte, 4);
206 static int dip_inaddr(struct in_addr a, struct in_addr b) {
207 /* fixme implement sortlist */
211 static int di_inaddr(const void *datap_a, const void *datap_b) {
212 const struct in_addr *ap= datap_a, *bp= datap_b;
214 return dip_inaddr(*ap,*bp);
217 static adns_status cs_inaddr(vbuf *vb, const void *datap) {
218 const struct in_addr *rrp= datap, rr= *rrp;
221 ia= inet_ntoa(rr); assert(ia);
227 * _addr (pa,di,csp,cs)
230 static adns_status pa_addr(const parseinfo *pai, int cbyte, int max, void *datap) {
231 adns_addr *storeto= datap;
232 const byte *dgram= pai->dgram;
234 if (max-cbyte != 4) return adns_s_invaliddata;
235 storeto->len= sizeof(storeto->addr.inet);
236 memset(&storeto->addr,0,sizeof(storeto->addr.inet));
237 storeto->addr.inet.sin_family= AF_INET;
238 storeto->addr.inet.sin_port= 0;
239 memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4);
243 static int di_addr(const void *datap_a, const void *datap_b) {
244 const adns_addr *ap= datap_a, *bp= datap_b;
246 assert(ap->addr.sa.sa_family == AF_INET);
247 return dip_inaddr(ap->addr.inet.sin_addr,bp->addr.inet.sin_addr);
250 static adns_status csp_addr(vbuf *vb, const adns_addr *rrp) {
254 switch (rrp->addr.inet.sin_family) {
256 CSP_ADDSTR("AF_INET ");
257 ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia);
261 sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
268 static adns_status cs_addr(vbuf *vb, const void *datap) {
269 const adns_addr *rrp= datap;
271 return csp_addr(vb,rrp);
278 static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
279 char **domain_r, parsedomain_flags flags) {
283 st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
284 pai->dgram,pai->dglen, cbyte_io, max);
286 if (!pai->qu->vb.used) return adns_s_invaliddata;
288 dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
291 dm[pai->qu->vb.used]= 0;
292 memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
302 static adns_status pa_host_raw(const parseinfo *pai, int cbyte, int max, void *datap) {
306 st= pap_domain(pai, &cbyte, max, rrp,
307 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
310 if (cbyte != max) return adns_s_invaliddata;
315 * _hostaddr (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs)
318 static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
319 int *cbyte_io, int count, int dmstart) {
321 int type, class, rdlen, rdstart, ownermatched;
324 for (rri=0, naddrs=-1; rri<count; rri++) {
325 st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, pai->dglen, cbyte_io,
326 &type, &class, &rdlen, &rdstart,
327 pai->dgram, pai->dglen, dmstart, &ownermatched);
329 if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) {
330 if (naddrs>0) break; else continue;
335 if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*sizeof(adns_addr))) R_NOMEM;
336 st= pa_addr(pai, rdstart,rdstart+rdlen, pai->qu->vb.buf + naddrs*sizeof(adns_addr));
341 ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_addr));
342 if (!ha->addrs) R_NOMEM;
343 memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_addr));
345 ha->astatus= adns_s_ok;
347 adns__isort(ha->addrs, naddrs, sizeof(adns_addr), pai->qu->vb.buf, di_addr);
352 static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
353 int max, adns_rr_hostaddr *rrp) {
360 dmstart= cbyte= *cbyte_io;
361 st= pap_domain(pai, &cbyte, max, &rrp->host,
362 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
366 rrp->astatus= adns_s_ok;
372 st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart);
374 if (rrp->naddrs != -1) return adns_s_ok;
376 st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart);
378 if (rrp->naddrs != -1) return adns_s_ok;
380 st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
381 pai->dgram, pai->dglen, dmstart,
382 adns_r_addr, adns_qf_quoteok_query);
386 st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
388 adns_qf_quoteok_query, pai->now, 0, &ctx);
391 nqu->parent= pai->qu;
392 LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
397 static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, int max, void *datap) {
398 adns_rr_hostaddr *rrp= datap;
401 st= pap_hostaddr(pai, &cbyte, max, rrp);
403 if (cbyte != max) return adns_s_invaliddata;
408 static int dip_hostaddr(const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
409 if (ap->astatus != bp->astatus) return ap->astatus;
410 if (ap->astatus) return 0;
412 assert(ap->addrs[0].addr.sa.sa_family == AF_INET);
413 assert(bp->addrs[0].addr.sa.sa_family == AF_INET);
414 return dip_inaddr(ap->addrs[0].addr.inet.sin_addr, bp->addrs[0].addr.inet.sin_addr);
417 static int di_hostaddr(const void *datap_a, const void *datap_b) {
418 const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
420 return dip_hostaddr(ap,bp);
423 static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
426 adns__makefinal_str(qu,&rrp->host);
428 adns__makefinal_block(qu, &tablev, rrp->naddrs*sizeof(*rrp->addrs));
432 static void mf_hostaddr(adns_query qu, void *datap) {
433 adns_rr_hostaddr *rrp= datap;
435 mfp_hostaddr(qu,rrp);
438 static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
443 st= csp_qstring(vb,rrp->host); if (st) return st;
447 CSP_ADDSTR(adns_strerror(rrp->astatus));
449 assert(rrp->naddrs > 0);
450 for (i=0, to_add= ": "; i<rrp->naddrs; i++, to_add= ", ") {
452 st= csp_addr(vb,&rrp->addrs[i]);
458 static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
459 const adns_rr_hostaddr *rrp= datap;
461 return csp_hostaddr(vb,rrp);
468 static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, int max, void *datap) {
469 const byte *dgram= pai->dgram;
470 adns_rr_intstr *rrp= datap;
474 if (cbyte+2 > max) return adns_s_invaliddata;
477 st= pap_domain(pai, &cbyte, max, &rrp->str,
478 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
481 if (cbyte != max) return adns_s_invaliddata;
485 static int di_mx_raw(const void *datap_a, const void *datap_b) {
486 const adns_rr_intstr *ap= datap_a, *bp= datap_b;
488 if (ap->i < bp->i) return 0;
489 if (ap->i > bp->i) return 1;
497 static adns_status pa_mx(const parseinfo *pai, int cbyte, int max, void *datap) {
498 const byte *dgram= pai->dgram;
499 adns_rr_inthostaddr *rrp= datap;
503 if (cbyte+2 > max) return adns_s_invaliddata;
506 st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
509 if (cbyte != max) return adns_s_invaliddata;
513 static int di_mx(const void *datap_a, const void *datap_b) {
514 const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
516 if (ap->i < bp->i) return 0;
517 if (ap->i > bp->i) return 1;
518 return dip_hostaddr(&ap->ha,&bp->ha);
522 * _inthostaddr (mf,cs)
525 static void mf_inthostaddr(adns_query qu, void *datap) {
526 adns_rr_inthostaddr *rrp= datap;
528 mfp_hostaddr(qu,&rrp->ha);
531 static adns_status cs_inthostaddr(vbuf *vb, const void *datap) {
532 const adns_rr_inthostaddr *rrp= datap;
535 sprintf(buf,"%u ",rrp->i);
538 return csp_hostaddr(vb,&rrp->ha);
545 static void mf_flat(adns_query qu, void *data) { }
551 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
553 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
554 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
556 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer) \
557 { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_##memb, cs_##memb, parser, comparer }
558 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer) \
559 { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_flat, cs_##memb, parser, comparer }
561 static const typeinfo typeinfos[] = {
562 /* Must be in ascending order of rrtype ! */
563 /* mem-mgmt code rrt fmt member parser comparer */
565 FLAT_TYPE(a, "A", 0, inaddr, pa_inaddr, di_inaddr ),
566 DEEP_TYPE(ns_raw, "NS", "raw", str, pa_host_raw, 0 ),
567 DEEP_TYPE(cname, "CNAME", 0, str, pa_host_raw, 0 ),
569 DEEP_TYPE(soa_raw, "SOA", "raw", soa, pa_soa, 0 ),
571 DEEP_TYPE(ptr_raw, "PTR", "raw", str, pa_host_raw, 0 ),
573 DEEP_TYPE(hinfo, "HINFO", 0, strpair, pa_hinfo, 0 ),
575 DEEP_TYPE(mx_raw, "MX", "raw", intstr, pa_mx_raw, di_mx_raw ),
576 DEEP_TYPE(txt, "TXT", 0, manyistr, pa_txt, 0 ),
578 DEEP_TYPE(rp_raw, "RP", "raw", strpair, pa_rp, 0 ),
581 FLAT_TYPE(addr, "A", "addr", addr, pa_addr, di_addr ),
582 DEEP_TYPE(ns, "NS", "+addr", hostaddr, pa_hostaddr, di_hostaddr ),
584 DEEP_TYPE(ptr, "PTR","checked", str, pa_ptr, 0 ),
586 DEEP_TYPE(mx, "MX", "+addr", inthostaddr, pa_mx, di_mx ),
589 DEEP_TYPE(soa, "SOA","822", soa, pa_soa, 0 ),
590 DEEP_TYPE(rp, "RP", "822", strpair, pa_rp, 0 ),
591 #endif /* fixme - implement all types */
594 const typeinfo *adns__findtype(adns_rrtype type) {
595 const typeinfo *begin, *end, *mid;
597 begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
599 while (begin < end) {
600 mid= begin + ((end-begin)>>1);
601 if (mid->type == type) return mid;
602 if (type > mid->type) begin= mid+1;