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 static int dip_inaddr(struct in_addr a, struct in_addr b) {
31 /* fixme implement sortlist */
35 static adns_status pa_inaddr(adns_query qu, int serv,
36 const byte *dgram, int dglen, int cbyte, int max,
37 int nsstart, int *arstart_io, void *datap) {
38 struct in_addr *storeto= datap;
40 if (max-cbyte != 4) return adns_s_invaliddata;
41 memcpy(storeto,dgram+cbyte,4);
45 static int di_inaddr(const void *datap_a, const void *datap_b) {
46 const struct in_addr *ap= datap_a, *bp= datap_b;
48 return dip_inaddr(*ap,*bp);
51 static adns_status cs_inaddr(vbuf *vb, const void *datap) {
52 const struct in_addr *rrp= datap, rr= *rrp;
55 ia= inet_ntoa(rr); assert(ia);
56 return adns__vbuf_appendstr(vb,ia) ? adns_s_ok : adns_s_nolocalmem;
59 static adns_status pa_addr(adns_query qu, int serv,
60 const byte *dgram, int dglen, int cbyte, int max,
62 adns_addr *storeto= datap;
64 if (max-cbyte != 4) return adns_s_invaliddata;
65 storeto->len= sizeof(storeto->addr.inet);
66 memset(&storeto->addr,0,sizeof(storeto->addr.inet));
67 storeto->addr.inet.sin_family= AF_INET;
68 storeto->addr.inet.sin_port= 0;
69 memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4);
73 static int di_addr(const void *datap_a, const void *datap_b) {
74 const adns_addr *ap= datap_a, *bp= datap_b;
76 return dip_inaddr(ap->addr.inet.sin_addr,bp->addr.inet.sin_addr);
79 static adns_status cs_addr(vbuf *vb, const void *datap) {
80 const adns_addr *rrp= datap;
84 switch (rrp->addr.inet.sin_family) {
86 if (!adns__vbuf_appendstr(vb,"AF_INET ")) return adns_s_nolocalmem;
87 ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia);
88 if (!adns__vbuf_appendstr(vb,ia)) return adns_s_nolocalmem;
91 sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
92 if (!adns__vbuf_appendstr(vb,buf)) return adns_s_nolocalmem;
98 static adns_status pap_domain(adns_query qu, int serv, parsedomain_flags flags,
99 const byte *dgram, int dglen, int *cbyte_io, int max,
104 st= adns__parse_domain(qu->ads,serv,qu,&qu->vb,flags, dgram,dglen, cbyte_io,max);
106 if (!qu->vb.used) return adns_s_invaliddata;
108 dm= adns__alloc_interim(qu,qu->vb.used+1);
109 if (!dm) return adns_s_nolocalmem;
112 memcpy(dm,qu->vb.buf,qu->vb.used);
118 static adns_status pa_host_raw(adns_query qu, int serv,
119 const byte *dgram, int dglen, int cbyte, int max,
120 int nsstart, int *arstart_io, void *datap) {
124 st= pap_domain(qu,serv,
125 qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0,
126 dgram,dglen,&cbyte,max,rrp);
129 if (cbyte != max) return adns_s_invaliddata;
133 static adns_status pa_mx_raw(adns_query qu, int serv,
134 const byte *dgram, int dglen, int cbyte, int max,
135 int nsstart, int *arstart_io, void *datap) {
136 adns_rr_intstr *rrp= datap;
140 if (cbyte+2 > max) return adns_s_invaliddata;
143 st= pap_domain(qu,serv,
144 qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0,
145 dgram,dglen,&cbyte,max,&rrp->str);
148 if (cbyte != max) return adns_s_invaliddata;
153 static adns_status pap_findaddrs(adns_query qu, int serv, adns_rr_hostaddr *ha,
154 const byte *dgram, int dglen, int *cbyte_io,
155 int dmstart, int count) {
157 int type, class, rdlen, rdstart, ownermatched;
159 for (rri=0, nrrs=-1; rri<count; rri++) {
160 st= adns__findrr_anychk(qu,serv,dgram,dglen,cbyte_io,
161 &type,&class,&rdlen,&rdstart,
165 if (class != DNS_CLASS_IN) continue;
166 if (type != adns_r_a) continue;
171 if (!adns__vbuf_ensure(&qu->vb,qu->vb.used+sizeof(adns_addr)))
172 return adns_s_nolocalmem;
173 st= pa_addr(qu,serv, dgram,dglen, rdstart,rdstart+rdlen,
174 qu->vb.buf + qu->vb.used);
176 qu->vb.used += sizeof(adns_addr);
180 ha->rrs= adns__alloc_interim(qu,qu->vb.used);
181 if (!ha->rrs) return adns_s_nolocalmem;
183 ha->astatus= adns_s_ok;
188 static adns_status pap_hostaddr(adns_query qu, int serv,
189 const byte *dgram, int dglen, int *cbyte_io, int max,
190 int nsstart, int nscount, int arcount, void *datap) {
191 adns_rr_hostaddr **rrp= datap;
195 dmstart= cbyte= *cbyte_io;
196 st= pap_domain(qu,serv,
197 qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0,
198 dgram,dglen,&cbyte,max,&rrp->dm);
202 rrp->astatus= adns_s_ok;
208 st= pap_findaddrs(qu, rrp, dgram,dglen,&cbyte, dmstart);
210 if (rrp->naddrs != -1) return adns_s_ok;
212 st= pap_findaddrs(qu, rrp, dgram,dglen,&cbyte, dmstart);
214 if (rrp->naddrs != -1) return adns_s_ok;
217 static adns_status pa_hostaddr(adns_query qu, int serv,
218 const byte *dgram, int dglen, int cbyte, int max,
219 int nsstart, void *datap) {
220 adns_rr_hostaddr **rrp= datap;
225 st= pap_domain(qu,serv,
226 qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0,
227 dgram,dglen,&cbyte,max,&rrp->dm);
229 if (cbyte != max) return adns_s_invaliddata;
231 rrp->astatus= adns_s_ok;
237 st= pap_findaddrs(qu, rrp, dgram,dglen, dmstart,&cbyte);
239 if (rrp->naddrs != -1) return adns_s_ok;
241 st= pap_findaddrs(qu, rrp, dgram,dglen, dmstart,&cbyte);
243 if (rrp->naddrs != -1) return adns_s_ok;
245 assert(!"additional section didn't have required data");
248 static int di_mx_raw(const void *datap_a, const void *datap_b) {
249 const adns_rr_intstr *ap= datap_a, *bp= datap_b;
251 if (ap->i < bp->i) return 0;
252 if (ap->i > bp->i) return 1;
256 static adns_status pa_txt(adns_query qu, int serv,
257 const byte *dgram, int dglen, int startbyte, int max,
258 int nsstart, int *arstart_io, void *datap) {
259 adns_rr_intstr **rrp= datap, *table, *te;
260 int ti, tc, cbyte, l;
263 if (cbyte >= max) return adns_s_invaliddata;
265 while (cbyte < max) {
269 if (cbyte != max) return adns_s_invaliddata;
271 table= adns__alloc_interim(qu,sizeof(*table)*(tc+1));
272 if (!table) return adns_s_nolocalmem;
274 for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
276 te->str= adns__alloc_interim(qu,l+1);
277 if (!te->str) return adns_s_nolocalmem;
279 memcpy(te->str,dgram+cbyte,l);
282 assert(cbyte == max);
291 static int csp_textdata(vbuf *vb, const char *dp, int len) {
296 if (!adns__vbuf_append(vb,"\"",1)) return 0;
298 for (cn=0; cn<len; cn++) {
300 if (ch >= 32 && ch <= 126 && ch != '"' && ch != '\\') {
301 if (!adns__vbuf_append(vb,&ch,1)) return 0;
303 sprintf(buf,"\\%02x",ch);
304 if (!adns__vbuf_appendstr(vb,buf)) return 0;
308 if (!adns__vbuf_append(vb,"\"",1)) return 0;
312 static int csp_qstring(vbuf *vb, const char *dp) {
313 return csp_textdata(vb, dp, strlen(dp));
316 static adns_status cs_str(vbuf *vb, const void *datap) {
317 const char *const *rrp= datap;
319 return csp_qstring(vb,*rrp) ? adns_s_ok : adns_s_nolocalmem;
322 static adns_status cs_intstr(vbuf *vb, const void *datap) {
323 const adns_rr_intstr *rrp= datap;
326 sprintf(buf,"%u ",rrp->i);
327 return (adns__vbuf_appendstr(vb,buf) &&
328 csp_qstring(vb,rrp->str)) ? adns_s_ok : adns_s_nolocalmem;
331 static adns_status cs_manyistr(vbuf *vb, const void *datap) {
332 const adns_rr_intstr *const *rrp= datap;
333 const adns_rr_intstr *current;
336 for (spc=0, current= *rrp; current->i >= 0; current++) {
338 if (!adns__vbuf_append(vb," ",1)) goto x_nomem;
339 if (!csp_textdata(vb,current->str,current->i)) goto x_nomem;
344 return adns_s_nolocalmem;
347 static void mf_str(adns_query qu, void *datap) {
350 adns__makefinal_str(qu,rrp);
353 static void mf_intstr(adns_query qu, void *datap) {
354 adns_rr_intstr *rrp= datap;
356 adns__makefinal_str(qu,&rrp->str);
359 static void mf_manyistr(adns_query qu, void *datap) {
360 adns_rr_intstr **rrp= datap;
361 adns_rr_intstr *te, *table;
365 for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
367 adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
369 for (te= *rrp; te->i >= 0; te++)
370 adns__makefinal_str(qu,&te->str);
373 static void mf_flat(adns_query qu, void *data) { }
375 #define TYPE_SF(size,func,cp,free) size, pa_##func, mf_##free, cs_##cp
376 #define TYPE_SN(size,func,cp) size, pa_##func, mf_flat, cs_##cp
377 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
378 #define TYPE_MF(memb,parse) TYPE_SF(TYPESZ_M(memb),parse,memb,memb)
379 #define TYPE_MN(memb,parse) TYPE_SN(TYPESZ_M(memb),parse,memb)
381 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
382 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
385 * ms is M specify member name
386 * or S specify size explicitly
387 * nf is F full memory management, dependent on member name or specified func
388 * N no memory management required
391 static const typeinfo typeinfos[] = {
392 /* Must be in ascending order of rrtype ! */
393 /* rr type code rrt fmt mem.mgmt member parser comparer */
395 { adns_r_a, "A", 0, FLAT_MEMB(inaddr), pa_inaddr, di_inaddr },
396 { adns_r_ns_raw, "NS", "raw", DEEP_MEMB(str), pa_host_raw, 0 },
397 { adns_r_cname, "CNAME", 0, DEEP_MEMB(str), pa_host_raw, 0 },
399 { adns_r_soa_raw, "SOA", "raw", DEEP_MEMB(soa), pa_soa, 0 },
401 { adns_r_ptr_raw, "PTR", "raw", DEEP_MEMB(str), pa_host_raw, 0 },
403 { adns_r_hinfo, "HINFO", 0, DEEP_MEMB(strpair), pa_hinfo, 0 },
405 { adns_r_mx_raw, "MX", "raw", DEEP_MEMB(intstr), pa_mx_raw, di_mx_raw },
406 { adns_r_txt, "TXT", 0, DEEP_MEMB(manyistr), pa_txt, 0 },
408 { adns_r_rp_raw, "RP", "raw", DEEP_MEMB(strpair), pa_rp, 0 },
411 { adns_r_addr, "A", "addr", FLAT_MEMB(addr), pa_addr, di_addr },
412 { adns_r_ns, "NS", "+addr", DEEP_MEMB(dmaddr), pa_hostaddr, di_hostaddr },
414 { adns_r_ptr, "PTR","checked", DEEP_MEMB(str), pa_ptr, 0 },
415 { adns_r_mx, "MX", "+addr", DEEP_MEMB(intdmaddr), pa_mx, di_mx },
419 { adns_r_soa, "SOA","822", DEEP_MEMB(soa), pa_soa, 0 },
420 { adns_r_rp, "RP", "822", DEEP_MEMB(strpair), pa_rp, 0 },
424 const typeinfo *adns__findtype(adns_rrtype type) {
425 const typeinfo *begin, *end, *mid;
427 begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
429 while (begin < end) {
430 mid= begin + ((end-begin)>>1);
431 if (mid->type == type) return mid;
432 if (type > mid->type) begin= mid+1;