X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git;a=blobdiff_plain;f=src%2Ftypes.c;h=e494ab36554fadb88d70dc557b393cd80705fcce;hp=45741fa36cee820080a584cfa1bac145194738fa;hb=7da210700fbdd45a273d6735f6a2a55ae3838633;hpb=e576be5096ae358bebe2e9b6ad07c49f74aef616

diff --git a/src/types.c b/src/types.c
index 45741fa..e494ab3 100644
--- a/src/types.c
+++ b/src/types.c
@@ -20,60 +20,579 @@
  *  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 
  */
 
+#include <stdlib.h>
+#include <string.h>
+
+#include <arpa/inet.h>
+
 #include "internal.h"
 
-static adns_status rp_inaddr(adns_state ads, adns_query qu, int serv,
-			     const byte *dgram, int dglen, int cbyte, int max,
-			     void *store_r) {
-  struct in_addr *dr= store_r;
+#define R_NOMEM           return adns_s_nolocalmem
+#define CSP_ADDSTR(s)     if (!adns__vbuf_appendstr(vb,(s))) R_NOMEM; else;
+
+/*
+ * order of sections:
+ *
+ * _textdata, _qstring        (csp)
+ * _str                       (mf,cs)
+ * _intstr                    (mf,cs)
+ * _manyistr                  (mf,cs)
+ * _txt                       (pa)
+ * _inaddr                    (pa,dip,di)
+ * _addr                      (pa,di,csp,cs)
+ * _domain                    (pap)
+ * _host_raw                  (pa)
+ * _hostaddr                  (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs)
+ * _mx_raw                    (pa,di)
+ * _mx                        (pa,di)
+ * _inthostaddr               (mf,cs)
+ * _flat                      (mf)
+ *
+ * within each section:
+ *    pap_*
+ *    pa_*
+ *    dip_*
+ *    di_*
+ *    mfp_*
+ *    mf_*
+ *    csp_*
+ *    cs_*
+ */
+
+/*
+ * _textdata, _qstring   (csp)
+ */
+
+static adns_status csp_textdata(vbuf *vb, const char *dp, int len) {
+  unsigned char ch;
+  char buf[10];
+  int cn;
+
+  CSP_ADDSTR("\"");
+  for (cn=0; cn<len; cn++) {
+    ch= *dp++;
+    if (ch >= 32 && ch <= 126 && ch != '"' && ch != '\\') {
+      if (!adns__vbuf_append(vb,&ch,1)) R_NOMEM;
+    } else {
+      sprintf(buf,"\\%02x",ch);
+      CSP_ADDSTR(buf);
+    }
+  }
+  CSP_ADDSTR("\"");
+  
+  return adns_s_ok;
+}
+
+static adns_status csp_qstring(vbuf *vb, const char *dp) {
+  return csp_textdata(vb, dp, strlen(dp));
+}
+
+/*
+ * _str  (mf,cs)
+ */
+
+static void mf_str(adns_query qu, void *datap) {
+  char **rrp= datap;
+
+  adns__makefinal_str(qu,rrp);
+}
+
+static adns_status cs_str(vbuf *vb, const void *datap) {
+  const char *const *rrp= datap;
+
+  return csp_qstring(vb,*rrp);
+}
+
+/*
+ * _intstr  (mf,cs)
+ */
+
+static void mf_intstr(adns_query qu, void *datap) {
+  adns_rr_intstr *rrp= datap;
+
+  adns__makefinal_str(qu,&rrp->str);
+}
+
+static adns_status cs_intstr(vbuf *vb, const void *datap) {
+  const adns_rr_intstr *rrp= datap;
+  char buf[10];
+
+  sprintf(buf,"%u ",rrp->i);
+  CSP_ADDSTR(buf);
+  return csp_qstring(vb,rrp->str);
+}
+
+/*
+ * _manyistr   (mf,cs)
+ */
+
+static void mf_manyistr(adns_query qu, void *datap) {
+  adns_rr_intstr **rrp= datap;
+  adns_rr_intstr *te, *table;
+  void *tablev;
+  int tc;
+
+  for (tc=0, te= *rrp; te->i >= 0; te++, tc++);
+  tablev= *rrp;
+  adns__makefinal_block(qu,&tablev,sizeof(*te)*(tc+1));
+  *rrp= table= tablev;
+  for (te= *rrp; te->i >= 0; te++)
+    adns__makefinal_str(qu,&te->str);
+}
+
+static adns_status cs_manyistr(vbuf *vb, const void *datap) {
+  const adns_rr_intstr *const *rrp= datap;
+  const adns_rr_intstr *current;
+  adns_status st;
+  int spc;
+
+  for (spc=0, current= *rrp; current->i >= 0; current++) {
+    if (spc) CSP_ADDSTR(" ");
+    st= csp_textdata(vb,current->str,current->i); if (st) return st;
+  }
+  return adns_s_ok;
+}
+
+/*
+ * _txt   (pa)
+ */
+
+static adns_status pa_txt(const parseinfo *pai, int cbyte, int max, void *datap) {
+  adns_rr_intstr **rrp= datap, *table, *te;
+  const byte *dgram= pai->dgram;
+  int ti, tc, l, startbyte;
+
+  startbyte= cbyte;
+  if (cbyte >= max) return adns_s_invaliddata;
+  tc= 0;
+  while (cbyte < max) {
+    GET_B(cbyte,l);
+    cbyte+= l;
+  }
+  if (cbyte != max) return adns_s_invaliddata;
+
+  table= adns__alloc_interim(pai->qu,sizeof(*table)*(tc+1));
+  if (!table) R_NOMEM;
+
+  for (cbyte=startbyte, ti=0, te=table; ti<tc; ti++, te++) {
+    GET_B(cbyte,l);
+    te->str= adns__alloc_interim(pai->qu, l+1);
+    if (!te->str) R_NOMEM;
+    te->str[l]= 0;
+    memcpy(te->str,dgram+cbyte,l);
+    te->i= l;
+  }
+  assert(cbyte == max);
+
+  te->i= -1;
+  te->str= 0;
+  
+  *rrp= table;
+  return adns_s_ok;
+}
+
+/*
+ * _inaddr   (pa,dip,di)
+ */
+
+static adns_status pa_inaddr(const parseinfo *pai, int cbyte, int max, void *datap) {
+  struct in_addr *storeto= datap;
   
   if (max-cbyte != 4) return adns_s_invaliddata;
-  memcpy(dr,dgram+cbyte,4);
+  memcpy(storeto, pai->dgram + cbyte, 4);
   return adns_s_ok;
 }
 
-static adns_status rmf_null(adns_state ads, adns_query qu, void *data) { }
+static int dip_inaddr(struct in_addr a, struct in_addr b) {
+  /* fixme implement sortlist */
+  return 0;
+}
+
+static int di_inaddr(const void *datap_a, const void *datap_b) {
+  const struct in_addr *ap= datap_a, *bp= datap_b;
+
+  return dip_inaddr(*ap,*bp);
+}
+
+static adns_status cs_inaddr(vbuf *vb, const void *datap) {
+  const struct in_addr *rrp= datap, rr= *rrp;
+  const char *ia;
 
-#define TYPE_SF(size,func,free)    size, rp_#func, rmf_#free
-#define TYPE_SN(size,func)         size, rp_#func, rmf_null
-#define TYPESZ_M(member)           (sizeof(((adns_answer*)0)->rrs.member))
-#define TYPE_MF(member,parse)      TYPE_SF(TYPESZ_M(member),parse,member)
-#define TYPE_MN(member,parse)      TYPE_SN(TYPESZ_M(member),parse)
+  ia= inet_ntoa(rr); assert(ia);
+  CSP_ADDSTR(ia);
+  return adns_s_ok;
+}
 
-/* TYPE_<ms><nf>
- *  ms is M  specify member name
- *     or S  specify size explicitly
- *  nf is F  full memory management, dependent on member name or specified func
- *        N  no memory management required
+/*
+ * _addr   (pa,di,csp,cs)
  */
 
-static const typeinfo typeinfos[] = {
-  /* Must be in ascending order of rrtype ! */
-  /* rr type code     name             style     member     size  parser */
+static adns_status pa_addr(const parseinfo *pai, int cbyte, int max, void *datap) {
+  adns_addr *storeto= datap;
+  const byte *dgram= pai->dgram;
+
+  if (max-cbyte != 4) return adns_s_invaliddata;
+  storeto->len= sizeof(storeto->addr.inet);
+  memset(&storeto->addr,0,sizeof(storeto->addr.inet));
+  storeto->addr.inet.sin_family= AF_INET;
+  storeto->addr.inet.sin_port= 0;
+  memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4);
+  return adns_s_ok;
+}
+
+static int di_addr(const void *datap_a, const void *datap_b) {
+  const adns_addr *ap= datap_a, *bp= datap_b;
+
+  assert(ap->addr.sa.sa_family == AF_INET);
+  return dip_inaddr(ap->addr.inet.sin_addr,bp->addr.inet.sin_addr);
+}
+
+static adns_status csp_addr(vbuf *vb, const adns_addr *rrp) {
+  const char *ia;
+  static char buf[30];
+
+  switch (rrp->addr.inet.sin_family) {
+  case AF_INET:
+    CSP_ADDSTR("AF_INET ");
+    ia= inet_ntoa(rrp->addr.inet.sin_addr); assert(ia);
+    CSP_ADDSTR(ia);
+    break;
+  default:
+    sprintf(buf,"AF=%u",rrp->addr.sa.sa_family);
+    CSP_ADDSTR(buf);
+    break;
+  }
+  return adns_s_ok;
+}
+
+static adns_status cs_addr(vbuf *vb, const void *datap) {
+  const adns_addr *rrp= datap;
+
+  return csp_addr(vb,rrp);
+}
+
+/*
+ * _domain  (pap)
+ */
+
+static adns_status pap_domain(const parseinfo *pai, int *cbyte_io, int max,
+			      char **domain_r, parsedomain_flags flags) {
+  adns_status st;
+  char *dm;
+  
+  st= adns__parse_domain(pai->qu->ads, pai->serv, pai->qu, &pai->qu->vb, flags,
+			 pai->dgram,pai->dglen, cbyte_io, max);
+  if (st) return st;
+  if (!pai->qu->vb.used) return adns_s_invaliddata;
+
+  dm= adns__alloc_interim(pai->qu, pai->qu->vb.used+1);
+  if (!dm) R_NOMEM;
+
+  dm[pai->qu->vb.used]= 0;
+  memcpy(dm,pai->qu->vb.buf,pai->qu->vb.used);
   
-  {  adns_r_a,        "A",             TYPE_MN(  inaddr,          inaddr       ) },
-#if 0 /*fixme*/		                   	       
-  {  adns_r_ns_raw,   "NS(raw)",       TYPE_MF(  str,             domain_raw   ) },
-  {  adns_r_cname,    "CNAME",         TYPE_MF(  str,             domain_raw   ) },
-  {  adns_r_soa_raw,  "SOA(raw)",      TYPE_MF(  soa,             soa          ) },
-  {  adns_r_null,     "NULL",          TYPE_SN(              0,   null         ) },
-  {  adns_r_ptr_raw,  "PTR(raw)",      TYPE_MF(  str,             domain_raw   ) },
-  {  adns_r_hinfo,    "HINFO",         TYPE_MF(  strpair,         hinfo        ) },
-  {  adns_r_mx_raw,   "MX(raw)",       TYPE_MF(  intstr,          mx_raw       ) },
-  {  adns_r_txt,      "TXT",           TYPE_MF(  str,             txt          ) },
-  {  adns_r_rp_raw,   "RP(raw)",       TYPE_MF(  strpair,         rp           ) },
-    		       	                                      
-  {  adns_r_ns,       "NS(+addr)",     TYPE_MF(  dmaddr,          dmaddr       ) },
-  {  adns_r_ptr,      "PTR(checked)",  TYPE_MF(  str,             ptr          ) },
-  {  adns_r_mx,       "MX(+addr)",     TYPE_MF(  intdmaddr,       mx           ) },
-    		       	                                      
-  {  adns_r_soa,      "SOA(822)",      TYPE_MF(  soa,             soa          ) },
-  {  adns_r_rp,       "RP(822)",       TYPE_MF(  strpair,         rp           ) },
+  *domain_r= dm;
+  return adns_s_ok;
+}
+
+/*
+ * _host_raw   (pa)
+ */
+
+static adns_status pa_host_raw(const parseinfo *pai, int cbyte, int max, void *datap) {
+  char **rrp= datap;
+  adns_status st;
+
+  st= pap_domain(pai, &cbyte, max, rrp,
+		 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
+  if (st) return st;
+  
+  if (cbyte != max) return adns_s_invaliddata;
+  return adns_s_ok;
+}
+
+/*
+ * _hostaddr   (pap,pa,dip,di,mfp,mf,csp,cs +pap_findaddrs)
+ */
+
+static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
+				 int *cbyte_io, int count, int dmstart) {
+  int rri, naddrs;
+  int type, class, rdlen, rdstart, ownermatched;
+  adns_status st;
+  
+  for (rri=0, naddrs=-1; rri<count; rri++) {
+    st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram, pai->dglen, cbyte_io,
+			    &type, &class, &rdlen, &rdstart,
+			    pai->dgram, pai->dglen, dmstart, &ownermatched);
+    if (st) return st;
+    if (!ownermatched || class != DNS_CLASS_IN || type != adns_r_a) {
+      if (naddrs>0) break; else continue;
+    }
+    if (naddrs == -1) {
+      naddrs= 0;
+    }
+    if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*sizeof(adns_addr))) R_NOMEM;
+    st= pa_addr(pai, rdstart,rdstart+rdlen, pai->qu->vb.buf + naddrs*sizeof(adns_addr));
+    if (st) return st;
+    naddrs++;
+  }
+  if (naddrs >= 0) {
+    ha->addrs= adns__alloc_interim(pai->qu, naddrs*sizeof(adns_addr));
+    if (!ha->addrs) R_NOMEM;
+    memcpy(ha->addrs, pai->qu->vb.buf, naddrs*sizeof(adns_addr));
+    ha->naddrs= naddrs;
+    ha->astatus= adns_s_ok;
+
+    adns__isort(ha->addrs, naddrs, sizeof(adns_addr), pai->qu->vb.buf, di_addr);
+  }
+  return adns_s_ok;
+}
+
+static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
+				int max, adns_rr_hostaddr *rrp) {
+  adns_status st;
+  int dmstart, cbyte;
+  qcontext ctx;
+  int id;
+  adns_query nqu;
+
+  dmstart= cbyte= *cbyte_io;
+  st= pap_domain(pai, &cbyte, max, &rrp->host,
+		 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
+  if (st) return st;
+  *cbyte_io= cbyte;
+
+  rrp->astatus= adns_s_ok;
+  rrp->naddrs= -1;
+  rrp->addrs= 0;
+
+  cbyte= pai->nsstart;
+
+  st= pap_findaddrs(pai, rrp, &cbyte, pai->nscount, dmstart);
+  if (st) return st;
+  if (rrp->naddrs != -1) return adns_s_ok;
+
+  st= pap_findaddrs(pai, rrp, &cbyte, pai->arcount, dmstart);
+  if (st) return st;
+  if (rrp->naddrs != -1) return adns_s_ok;
+
+  st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
+			    pai->dgram, pai->dglen, dmstart,
+			    adns_r_addr, adns_qf_quoteok_query);
+  if (st) return st;
+  
+  ctx.hostaddr= rrp;
+  st= adns__internal_submit(pai->ads, &nqu, adns__findtype(adns_r_addr),
+			    &pai->qu->vb, id,
+			    adns_qf_quoteok_query, pai->now, 0, &ctx);
+  if (st) return st;
+
+  nqu->parent= pai->qu;
+  LIST_LINK_TAIL_PART(pai->qu->children,nqu,siblings.);
+
+  return adns_s_ok;
+}
+
+static adns_status pa_hostaddr(const parseinfo *pai, int cbyte, int max, void *datap) {
+  adns_rr_hostaddr *rrp= datap;
+  adns_status st;
+
+  st= pap_hostaddr(pai, &cbyte, max, rrp);
+  if (st) return st;
+  if (cbyte != max) return adns_s_invaliddata;
+
+  return adns_s_ok;
+}
+
+static int dip_hostaddr(const adns_rr_hostaddr *ap, const adns_rr_hostaddr *bp) {
+  if (ap->astatus != bp->astatus) return ap->astatus;
+  if (ap->astatus) return 0;
+
+  assert(ap->addrs[0].addr.sa.sa_family == AF_INET);
+  assert(bp->addrs[0].addr.sa.sa_family == AF_INET);
+  return dip_inaddr(ap->addrs[0].addr.inet.sin_addr, bp->addrs[0].addr.inet.sin_addr);
+}
+
+static int di_hostaddr(const void *datap_a, const void *datap_b) {
+  const adns_rr_hostaddr *ap= datap_a, *bp= datap_b;
+
+  return dip_hostaddr(ap,bp);
+}
+
+static void mfp_hostaddr(adns_query qu, adns_rr_hostaddr *rrp) {
+  void *tablev;
+
+  adns__makefinal_str(qu,&rrp->host);
+  tablev= rrp->addrs;
+  adns__makefinal_block(qu, &tablev, rrp->naddrs*sizeof(*rrp->addrs));
+  rrp->addrs= tablev;
+}
+
+static void mf_hostaddr(adns_query qu, void *datap) {
+  adns_rr_hostaddr *rrp= datap;
+
+  mfp_hostaddr(qu,rrp);
+}
+
+static adns_status csp_hostaddr(vbuf *vb, const adns_rr_hostaddr *rrp) {
+  const char *to_add;
+  adns_status st;
+  int i;
+
+  st= csp_qstring(vb,rrp->host); if (st) return st;
+
+  if (rrp->astatus) {
+    CSP_ADDSTR(" - ");
+    CSP_ADDSTR(adns_strerror(rrp->astatus));
+  } else {
+    assert(rrp->naddrs > 0);
+    for (i=0, to_add= ": "; i<rrp->naddrs; i++, to_add= ", ") {
+      CSP_ADDSTR(to_add);
+      st= csp_addr(vb,&rrp->addrs[i]);
+    }
+  }
+  return adns_s_ok;
+}
+
+static adns_status cs_hostaddr(vbuf *vb, const void *datap) {
+  const adns_rr_hostaddr *rrp= datap;
+
+  return csp_hostaddr(vb,rrp);
+}
+
+/*
+ * _mx_raw   (pa,di)
+ */
+
+static adns_status pa_mx_raw(const parseinfo *pai, int cbyte, int max, void *datap) {
+  const byte *dgram= pai->dgram;
+  adns_rr_intstr *rrp= datap;
+  adns_status st;
+  int pref;
+
+  if (cbyte+2 > max) return adns_s_invaliddata;
+  GET_W(cbyte,pref);
+  rrp->i= pref;
+  st= pap_domain(pai, &cbyte, max, &rrp->str,
+		 pai->qu->flags & adns_qf_quoteok_anshost ? pdf_quoteok : 0);
+  if (st) return st;
+  
+  if (cbyte != max) return adns_s_invaliddata;
+  return adns_s_ok;
+}
+
+static int di_mx_raw(const void *datap_a, const void *datap_b) {
+  const adns_rr_intstr *ap= datap_a, *bp= datap_b;
+
+  if (ap->i < bp->i) return 0;
+  if (ap->i > bp->i) return 1;
+  return 0;
+}
+
+/*
+ * _mx   (pa,di)
+ */
+
+static adns_status pa_mx(const parseinfo *pai, int cbyte, int max, void *datap) {
+  const byte *dgram= pai->dgram;
+  adns_rr_inthostaddr *rrp= datap;
+  adns_status st;
+  int pref;
+
+  if (cbyte+2 > max) return adns_s_invaliddata;
+  GET_W(cbyte,pref);
+  rrp->i= pref;
+  st= pap_hostaddr(pai, &cbyte, max, &rrp->ha);
+  if (st) return st;
+  
+  if (cbyte != max) return adns_s_invaliddata;
+  return adns_s_ok;
+}
+
+static int di_mx(const void *datap_a, const void *datap_b) {
+  const adns_rr_inthostaddr *ap= datap_a, *bp= datap_b;
+
+  if (ap->i < bp->i) return 0;
+  if (ap->i > bp->i) return 1;
+  return dip_hostaddr(&ap->ha,&bp->ha);
+}
+
+/*
+ * _inthostaddr  (mf,cs)
+ */
+
+static void mf_inthostaddr(adns_query qu, void *datap) {
+  adns_rr_inthostaddr *rrp= datap;
+
+  mfp_hostaddr(qu,&rrp->ha);
+}
+
+static adns_status cs_inthostaddr(vbuf *vb, const void *datap) {
+  const adns_rr_inthostaddr *rrp= datap;
+  char buf[10];
+
+  sprintf(buf,"%u ",rrp->i);
+  CSP_ADDSTR(buf);
+
+  return csp_hostaddr(vb,&rrp->ha);
+}
+
+/*
+ * _flat   (mf)
+ */
+
+static void mf_flat(adns_query qu, void *data) { }
+
+/*
+ * Now the table.
+ */
+
+#define TYPESZ_M(member)           (sizeof(*((adns_answer*)0)->rrs.member))
+
+#define DEEP_MEMB(memb) TYPESZ_M(memb), mf_##memb, cs_##memb
+#define FLAT_MEMB(memb) TYPESZ_M(memb), mf_flat, cs_##memb
+
+#define DEEP_TYPE(code,rrt,fmt,memb,parser,comparer) \
+ { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_##memb, cs_##memb, parser, comparer }
+#define FLAT_TYPE(code,rrt,fmt,memb,parser,comparer) \
+ { adns_r_##code, rrt, fmt, TYPESZ_M(memb), mf_flat, cs_##memb, parser, comparer }
+
+static const typeinfo typeinfos[] = {
+/* Must be in ascending order of rrtype ! */
+/* mem-mgmt code     rrt     fmt      member       parser        comparer    */
+  							     
+  FLAT_TYPE(a,       "A",     0,      inaddr,      pa_inaddr,    di_inaddr   ),
+  DEEP_TYPE(ns_raw,  "NS",   "raw",   str,         pa_host_raw,  0           ),
+  DEEP_TYPE(cname,   "CNAME", 0,      str,         pa_host_raw,  0           ),
+#if 0
+  DEEP_TYPE(soa_raw, "SOA",  "raw",   soa,         pa_soa,       0           ),
+#endif							     		 	     
+  DEEP_TYPE(ptr_raw, "PTR",  "raw",   str,         pa_host_raw,  0           ),
+#if 0
+  DEEP_TYPE(hinfo,   "HINFO", 0,      strpair,     pa_hinfo,     0           ),
+#endif							     		 	     
+  DEEP_TYPE(mx_raw,  "MX",   "raw",   intstr,      pa_mx_raw,    di_mx_raw   ),
+  DEEP_TYPE(txt,     "TXT",   0,      manyistr,    pa_txt,       0           ),
+#if 0
+  DEEP_TYPE(rp_raw,  "RP",   "raw",   strpair,     pa_rp,        0           ),
+#endif							     		 	     
+   		      	                                     		  	     
+  FLAT_TYPE(addr,    "A",  "addr",    addr,        pa_addr,      di_addr     ),
+  DEEP_TYPE(ns,      "NS", "+addr",   hostaddr,    pa_hostaddr,  di_hostaddr ),
+#if 0
+  DEEP_TYPE(ptr,     "PTR","checked", str,         pa_ptr,       0           ),
 #endif
+  DEEP_TYPE(mx,      "MX", "+addr",   inthostaddr, pa_mx,        di_mx       ),
+   		      	                                  		   
+#if 0
+  DEEP_TYPE(soa,     "SOA","822",     soa,         pa_soa,        0          ),
+  DEEP_TYPE(rp,      "RP", "822",     strpair,     pa_rp,         0          ),
+#endif /* fixme - implement all types */
 };
 
-const typeinfo adns__findtype(adns_rrtype type) {
-  const typeinfo *begin, *end;
+const typeinfo *adns__findtype(adns_rrtype type) {
+  const typeinfo *begin, *end, *mid;
 
   begin= typeinfos;  end= typeinfos+(sizeof(typeinfos)/sizeof(typeinfo));