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.
25 #include <arpa/inet.h>
29 static adns_status pa_inaddr(adns_query qu, int serv,
30 const byte *dgram, int dglen, int cbyte, int max,
32 struct in_addr *storeto= datap;
34 if (max-cbyte != 4) return adns_s_invaliddata;
35 memcpy(storeto,dgram+cbyte,4);
39 static int dip_inaddr(struct in_addr a, struct in_addr b) {
40 /* fixme implement sortlist */
44 static int di_inaddr(const void *datap_a, const void *datap_b) {
45 const struct in_addr *ap= datap_a, *bp= datap_b;
47 return dip_inaddr(*ap,*bp);
50 static adns_status cs_inaddr(vbuf *vb, const void *datap) {
51 const struct in_addr *rrp= datap, rr= *rrp;
54 ia= inet_ntoa(rr); assert(ia);
55 return adns__vbuf_appendstr(vb,ia) ? adns_s_ok : adns_s_nolocalmem;
58 static adns_status pap_domain(adns_query qu, int serv,
59 const byte *dgram, int dglen, int *cbyte_io, int max,
64 st= adns__parse_domain(qu->ads,serv,qu,&qu->vb,qu->flags,
65 dgram,dglen, cbyte_io,max);
67 if (!qu->vb.used) return adns_s_invaliddata;
69 dm= adns__alloc_interim(qu,qu->vb.used+1);
70 if (!dm) return adns_s_nolocalmem;
73 memcpy(dm,qu->vb.buf,qu->vb.used);
79 static adns_status pa_domain_raw(adns_query qu, int serv,
80 const byte *dgram, int dglen, int cbyte, int max,
85 st= pap_domain(qu,serv,dgram,dglen,&cbyte,max,rrp);
88 if (cbyte != max) return adns_s_invaliddata;
92 static adns_status pa_mx_raw(adns_query qu, int serv,
93 const byte *dgram, int dglen, int cbyte, int max,
95 adns_rr_intstr *rrp= datap;
99 if (cbyte+2 > max) return adns_s_invaliddata;
102 st= pap_domain(qu,serv,dgram,dglen,&cbyte,max,&rrp->str);
105 if (cbyte != max) return adns_s_invaliddata;
109 static int di_mx_raw(const void *datap_a, const void *datap_b) {
110 const adns_rr_intstr *ap= datap_a, *bp= datap_b;
112 if (ap->i < bp->i) return 0;
113 if (ap->i > bp->i) return 1;
117 static adns_status pa_txt(adns_query qu, int serv,
118 const byte *dgram, int dglen, int startbyte, int max,
120 adns_rr_intstr **rrp= datap, *table, *te;
121 int ti, tc, cbyte, l;
124 if (cbyte >= max) return adns_s_invaliddata;
126 while (cbyte < max) {
130 if (cbyte != max) return adns_s_invaliddata;
132 table= adns__alloc_interim(qu,sizeof(*table)*(tc+1));
133 if (!table) return adns_s_nolocalmem;
135 for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
137 te->str= adns__alloc_interim(qu,l+1);
138 if (!te->str) return adns_s_nolocalmem;
140 memcpy(te->str,dgram+cbyte,l);
143 assert(cbyte == max);
152 static int csp_textdata(vbuf *vb, const char *dp, int len) {
157 if (!adns__vbuf_append(vb,"\"",1)) return 0;
159 for (cn=0; cn<len; cn++) {
161 if (ch >= 32 && ch <= 126 && ch != '"' && ch != '\\') {
162 if (!adns__vbuf_append(vb,&ch,1)) return 0;
164 sprintf(buf,"\\%02x",ch);
165 if (!adns__vbuf_appendstr(vb,buf)) return 0;
169 if (!adns__vbuf_append(vb,"\"",1)) return 0;
173 static int csp_qstring(vbuf *vb, const char *dp) {
174 return csp_textdata(vb, dp, strlen(dp));
177 static adns_status cs_str(vbuf *vb, const void *datap) {
178 const char *const *rrp= datap;
180 return csp_qstring(vb,*rrp) ? adns_s_ok : adns_s_nolocalmem;
183 static adns_status cs_intstr(vbuf *vb, const void *datap) {
184 const adns_rr_intstr *rrp= datap;
187 sprintf(buf,"%u ",rrp->i);
188 return (adns__vbuf_appendstr(vb,buf) &&
189 csp_qstring(vb,rrp->str)) ? adns_s_ok : adns_s_nolocalmem;
192 static adns_status cs_manyistr(vbuf *vb, const void *datap) {
193 const adns_rr_intstr *const *rrp= datap;
194 const adns_rr_intstr *current;
197 for (spc=0, current= *rrp; current->i >= 0; current++) {
199 if (!adns__vbuf_append(vb," ",1)) goto x_nomem;
200 if (!csp_textdata(vb,current->str,current->i)) goto x_nomem;
205 return adns_s_nolocalmem;
208 static void mf_str(adns_query qu, void *datap) {
211 adns__makefinal_str(qu,rrp);
214 static void mf_intstr(adns_query qu, void *datap) {
215 adns_rr_intstr *rrp= datap;
217 adns__makefinal_str(qu,&rrp->str);
220 static void mf_manyistr(adns_query qu, void *datap) {
221 adns_rr_intstr **rrp= datap;
222 adns_rr_intstr *te, *table;
226 for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
228 adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
230 for (te= *rrp; te->i >= 0; te++)
231 adns__makefinal_str(qu,&te->str);
234 static void mf_flat(adns_query qu, void *data) { }
236 #define TYPE_SF(size,func,cp,free) size, pa_##func, mf_##free, cs_##cp
237 #define TYPE_SN(size,func,cp) size, pa_##func, mf_flat, cs_##cp
238 #define TYPESZ_M(member) (sizeof(*((adns_answer*)0)->rrs.member))
239 #define TYPE_MF(memb,parse) TYPE_SF(TYPESZ_M(memb),parse,memb,memb)
240 #define TYPE_MN(memb,parse) TYPE_SN(TYPESZ_M(memb),parse,memb)
242 #define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
243 #define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
246 * ms is M specify member name
247 * or S specify size explicitly
248 * nf is F full memory management, dependent on member name or specified func
249 * N no memory management required
252 static const typeinfo typeinfos[] = {
253 /* Must be in ascending order of rrtype ! */
254 /* rr type code rrt fmt mem.mgmt member parser comparer */
256 { adns_r_a, "A", 0, FLAT_MEMB(inaddr), pa_inaddr, di_inaddr },
257 { adns_r_ns_raw, "NS", "raw", DEEP_MEMB(str), pa_domain_raw, 0 },
258 { adns_r_cname, "CNAME", 0, DEEP_MEMB(str), pa_domain_raw, 0 },
260 { adns_r_soa_raw, "SOA", "raw", DEEP_MEMB(soa), pa_soa, 0 },
262 { adns_r_ptr_raw, "PTR", "raw", DEEP_MEMB(str), pa_domain_raw, 0 },
264 { adns_r_hinfo, "HINFO", 0, DEEP_MEMB(strpair), pa_hinfo, 0 },
266 { adns_r_mx_raw, "MX", "raw", DEEP_MEMB(intstr), pa_mx_raw, di_mx_raw },
267 { adns_r_txt, "TXT", 0, DEEP_MEMB(manyistr), pa_txt, 0 },
269 { adns_r_rp_raw, "RP", "raw", DEEP_MEMB(strpair), pa_rp, 0 },
273 { adns_r_ns, "NS", "+addr", DEEP_MEMB(dmaddr), pa_dmaddr, di_dmaddr },
274 { adns_r_ptr, "PTR","checked", DEEP_MEMB(str), pa_ptr, 0 },
275 { adns_r_mx, "MX", "+addr", DEEP_MEMB(intdmaddr), pa_mx, di_mx },
279 { adns_r_soa, "SOA", "822", DEEP_MEMB(soa), pa_soa, 0 },
280 { adns_r_rp, "RP", "822", DEEP_MEMB(strpair), pa_rp, 0 },
284 const typeinfo *adns__findtype(adns_rrtype type) {
285 const typeinfo *begin, *end, *mid;
287 begin= typeinfos; end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));
289 while (begin < end) {
290 mid= begin + ((end-begin)>>1);
291 if (mid->type == type) return mid;
292 if (type > mid->type) begin= mid+1;