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
) {
357 dmstart
= cbyte
= *cbyte_io
;
358 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->host
,
359 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
363 rrp
->astatus
= adns_s_ok
;
369 st
= pap_findaddrs(pai
, rrp
, &cbyte
, pai
->nscount
, dmstart
);
371 if (rrp
->naddrs
!= -1) return adns_s_ok
;
373 st
= pap_findaddrs(pai
, rrp
, &cbyte
, pai
->arcount
, dmstart
);
375 if (rrp
->naddrs
!= -1) return adns_s_ok
;
377 rrp
->naddrs
= 0; /* fixme additional section didn't have required data */
378 rrp
->astatus
= adns_s_notimplemented
;
383 static adns_status
pa_hostaddr(const parseinfo
*pai
, int cbyte
, int max
, void *datap
) {
384 adns_rr_hostaddr
*rrp
= datap
;
387 st
= pap_hostaddr(pai
, &cbyte
, max
, rrp
);
389 if (cbyte
!= max
) return adns_s_invaliddata
;
394 static int dip_hostaddr(const adns_rr_hostaddr
*ap
, const adns_rr_hostaddr
*bp
) {
395 if (ap
->astatus
!= bp
->astatus
) return ap
->astatus
;
396 if (ap
->astatus
) return 0;
398 assert(ap
->addrs
[0].addr
.sa
.sa_family
== AF_INET
);
399 assert(bp
->addrs
[0].addr
.sa
.sa_family
== AF_INET
);
400 return dip_inaddr(ap
->addrs
[0].addr
.inet
.sin_addr
, bp
->addrs
[0].addr
.inet
.sin_addr
);
403 static int di_hostaddr(const void *datap_a
, const void *datap_b
) {
404 const adns_rr_hostaddr
*ap
= datap_a
, *bp
= datap_b
;
406 return dip_hostaddr(ap
,bp
);
409 static void mfp_hostaddr(adns_query qu
, adns_rr_hostaddr
*rrp
) {
412 adns__makefinal_str(qu
,&rrp
->host
);
414 adns__makefinal_block(qu
, &tablev
, rrp
->naddrs
*sizeof(*rrp
->addrs
));
418 static void mf_hostaddr(adns_query qu
, void *datap
) {
419 adns_rr_hostaddr
*rrp
= datap
;
421 mfp_hostaddr(qu
,rrp
);
424 static adns_status
csp_hostaddr(vbuf
*vb
, const adns_rr_hostaddr
*rrp
) {
429 st
= csp_qstring(vb
,rrp
->host
); if (st
) return st
;
433 CSP_ADDSTR(adns_strerror(rrp
->astatus
));
435 assert(rrp
->naddrs
> 0);
436 for (i
=0, to_add
= ": "; i
<rrp
->naddrs
; i
++, to_add
= ", ") {
438 st
= csp_addr(vb
,&rrp
->addrs
[i
]);
444 static adns_status
cs_hostaddr(vbuf
*vb
, const void *datap
) {
445 const adns_rr_hostaddr
*rrp
= datap
;
447 return csp_hostaddr(vb
,rrp
);
454 static adns_status
pa_mx_raw(const parseinfo
*pai
, int cbyte
, int max
, void *datap
) {
455 const byte
*dgram
= pai
->dgram
;
456 adns_rr_intstr
*rrp
= datap
;
460 if (cbyte
+2 > max
) return adns_s_invaliddata
;
463 st
= pap_domain(pai
, &cbyte
, max
, &rrp
->str
,
464 pai
->qu
->flags
& adns_qf_quoteok_anshost ? pdf_quoteok
: 0);
467 if (cbyte
!= max
) return adns_s_invaliddata
;
471 static int di_mx_raw(const void *datap_a
, const void *datap_b
) {
472 const adns_rr_intstr
*ap
= datap_a
, *bp
= datap_b
;
474 if (ap
->i
< bp
->i
) return 0;
475 if (ap
->i
> bp
->i
) return 1;
483 static adns_status
pa_mx(const parseinfo
*pai
, int cbyte
, int max
, void *datap
) {
484 const byte
*dgram
= pai
->dgram
;
485 adns_rr_inthostaddr
*rrp
= datap
;
489 if (cbyte
+2 > max
) return adns_s_invaliddata
;
492 st
= pap_hostaddr(pai
, &cbyte
, max
, &rrp
->ha
);
495 if (cbyte
!= max
) return adns_s_invaliddata
;
499 static int di_mx(const void *datap_a
, const void *datap_b
) {
500 const adns_rr_inthostaddr
*ap
= datap_a
, *bp
= datap_b
;
502 if (ap
->i
< bp
->i
) return 0;
503 if (ap
->i
> bp
->i
) return 1;
504 return dip_hostaddr(&ap
->ha
,&bp
->ha
);
508 * _inthostaddr (mf,cs)
511 static void mf_inthostaddr(adns_query qu
, void *datap
) {
512 adns_rr_inthostaddr
*rrp
= datap
;
514 mfp_hostaddr(qu
,&rrp
->ha
);
517 static adns_status
cs_inthostaddr(vbuf
*vb
, const void *datap
) {
518 const adns_rr_inthostaddr
*rrp
= datap
;
521 sprintf(buf
,"%u ",rrp
->i
);
524 return csp_hostaddr(vb
,&rrp
->ha
);
531 static void mf_flat(adns_query qu
, void *data
) { }
537 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
539 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
540 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
542 #define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer) \
543 { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_##memb, cs_##memb, parser, comparer }
544 #define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer) \
545 { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_flat, cs_##memb, parser, comparer }
547 static const typeinfo typeinfos
[] = {
548 /* Must be in ascending order of rrtype ! */
549 /* mem-mgmt code rrt fmt member parser comparer */
551 FLAT_TYPE(a
, "A", 0, inaddr
, pa_inaddr
, di_inaddr
),
552 DEEP_TYPE(ns_raw
, "NS", "raw", str
, pa_host_raw
, 0 ),
553 DEEP_TYPE(cname
, "CNAME", 0, str
, pa_host_raw
, 0 ),
555 DEEP_TYPE(soa_raw
, "SOA", "raw", soa
, pa_soa
, 0 ),
557 DEEP_TYPE(ptr_raw
, "PTR", "raw", str
, pa_host_raw
, 0 ),
559 DEEP_TYPE(hinfo
, "HINFO", 0, strpair
, pa_hinfo
, 0 ),
561 DEEP_TYPE(mx_raw
, "MX", "raw", intstr
, pa_mx_raw
, di_mx_raw
),
562 DEEP_TYPE(txt
, "TXT", 0, manyistr
, pa_txt
, 0 ),
564 DEEP_TYPE(rp_raw
, "RP", "raw", strpair
, pa_rp
, 0 ),
567 FLAT_TYPE(addr
, "A", "addr", addr
, pa_addr
, di_addr
),
568 DEEP_TYPE(ns
, "NS", "+addr", hostaddr
, pa_hostaddr
, di_hostaddr
),
570 DEEP_TYPE(ptr
, "PTR","checked", str
, pa_ptr
, 0 ),
572 DEEP_TYPE(mx
, "MX", "+addr", inthostaddr
, pa_mx
, di_mx
),
575 DEEP_TYPE(soa
, "SOA","822", soa
, pa_soa
, 0 ),
576 DEEP_TYPE(rp
, "RP", "822", strpair
, pa_rp
, 0 ),
577 #endif /* fixme - implement all types */
580 const typeinfo
*adns__findtype(adns_rrtype type
) {
581 const typeinfo
*begin
, *end
, *mid
;
583 begin
= typeinfos
; end
= typeinfos
+(sizeof(typeinfos
)/sizeof(typeinfo
));
585 while (begin
< end
) {
586 mid
= begin
+ ((end
-begin
)>>1);
587 if (mid
->type
== type
) return mid
;
588 if (type
> mid
->type
) begin
= mid
+1;