+#define GETIL_B(cb) (dgram[*(cb)++])
+#define GET_B(cb,tv) ((tv)= GETIL_B((cb)))
+#define GET_W(cb,tv) ((tv)=0, (tv)|=(GETIL_B((cb))<<8), (tv)|=GETIL_B(cb), (tv))
+
+static void vbuf__append_quoted1035(vbuf *vb, const byte *buf, int len) {
+ char qbuf[10];
+ int i;
+
+ while (len) {
+ qbuf[0]= 0;
+ for (i=0; i<len; i++) {
+ ch= buf[i];
+ if (ch == '.' || ch == '"' || ch == '(' || ch == ')' ||
+ ch == '@' || ch == ';' || ch == '$') {
+ sprintf(qbuf,"\\%c",ch);
+ break;
+ } else if (ch <= ' ' || ch >= 127) {
+ sprintf(qbuf,"\\%03o",ch);
+ break;
+ }
+ }
+ if (!adns__vbuf_append(vb,buf,i) || !adns__vbuf_append(vb,qbuf,strlen(qbuf)))
+ return adns_s_nolocalmem;
+ buf+= i; len-= i;
+ }
+}
+
+static adns_status get_domain_perm(adns_state ads, adns_query qu, int serv,
+ const byte *dgram, int dglen,
+ int *cbyte_io, int max, char **domain_r) {
+ /* Returns 0 for OK (*domain_r set) or truncated (*domain_r null)
+ * or any other adns_s_* value.
+ */
+ int cbyte, sused, lablen;
+
+ /* If we follow a pointer we set cbyte_io to 0 to indicate that
+ * we've lost our original starting and ending points; we don't
+ * put the end of the pointed-to thing into the original *cbyte_io.
+ */
+ cbyte= *cbyte_io;
+ sused= qu->ans.used;
+ *domain_r= 0;
+ for (;;) {
+ if (cbyte>=max) goto x_truncated;
+ lablen= GET_B(cbyte);
+ if (!lablen) break;
+ if (lablen&0x0c000) {
+ if ((lablen&0x0c000) != 0x0c0000) return adns_s_unknownreply;
+ if (cbyte_io) { *cbyte_io= cbyte; cbyte_io= 0; }
+ cbyte= (lablen&0x3fff) + DNS_HDR_SIZE;
+ max= dglen;
+ continue;
+ }
+ if (cbyte+lablen>=max) bgoto x_truncated;
+ if (qu->ans.used != sused)
+ if (!adns__vbuf_append(&qu->ans,".",1)) return adns_s_nolocalmem;
+ if (qu->flags & adns_qf_anyquote) {
+ if (!vbuf__append_quoted1035(&qu->ans,dgram+cbyte,lablen))
+ return adns_s_nolocalmem;
+ } else {
+ if (!ctype_isalpha(dgram[cbyte])) return adns_s_invaliddomain;
+ for (i= cbyte+1; i<cbyte+lablen; i++) {
+ ch= dgram[cbyte];
+ if (ch != '-' && !ctype_isalpha(ch) && !ctype_isdigit(ch))
+ return adns_s_invaliddomain;
+ }
+ if (!adns__vbuf_append(&qu->ans,dgram+cbyte,lablen))
+ return adns_s_nolocalmem;
+ }
+ }
+ if (cbyte_io) *cbyte_io= cbyte;
+ if (!adns__vbuf_append(&qu->ans,"",1)) return adns_s_nolocalmem;
+ *domain_r= qu->ans.buf+sused;
+ return adns_s_ok;
+
+ x_truncated:
+ return cbyte_io ? -1 : adns_s_serverfaulty;
+}
+
+static adns_status get_domain_temp(adns_state ads, adns_query qu, int serv,
+ const byte *dgram, int dglen,
+ int *cbyte_io, int max, char **domain_r) {
+ int sused;
+ adns_status st;
+
+ sused= qu->ans.used;
+ st= get_domain_perm(ads,qu,serv,dgram,dglen,cbyte_io,max,domain_r);
+ qu->ans.used= sused;
+ return st;
+}
+
+/* fixme: sensible comparison of owners */
+
+static adns_status get_rr_temp(adns_state ads, adns_query qu, int serv,
+ const byte *dgram, int dglen,
+ int *cbyte_io,
+ int *type_r, int *class_r, int *rdlen_r, int *rdstart_r,
+ char **owner_r) {
+ int cbyte, tmp, rdlen;
+
+ cbyte= *cbyte_io;
+ st= get_domain_temp(ads,qu,serv,dgram,dglen,&cbyte,dglen,owner_r);
+ if (st) return st;
+
+ if (cbyte+10>len) goto x_truncated;
+ GET_W(cbyte,tmp); if (type_r) *type_r= tmp;
+ GET_W(cbyte,tmp); if (class_r) *class_r= tmp;
+ cbyte+= 4; /* we skip the TTL */
+ GET_W(cbyte,rdlen); if (rdlen_r) *rdlen_r= tmp;
+ if (rdstart_r) *rdstart_r= cbyte;
+ cbyte+= rdlen;
+ if (cbyte>dglen) goto x_truncated;
+ *cbyte_io= cbyte;
+ return adns_s_ok;
+
+ x_truncated:
+ *owner_r= 0; return 0;;
+}
+
+void adns__procdgram(adns_state ads, const byte *dgram, int dglen, int serv) {
+ int cbyte, anstart, rrstart, lablen, wantedrrs, get_t;
+
+ cbyte= 0;