X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=adns.git;a=blobdiff_plain;f=src%2Ftypes.c;h=c1d235ebb389fb27e2f9881d2e01afb18964d867;hp=cb343beb8d4e6177042a51289147f6df35716f72;hb=1bc731c6994dda2c1ab12fb2d8261246bcbc139c;hpb=07c3d3e2ca60a3dba7843ebeccc3dc06f3c8ce5d

diff --git a/src/types.c b/src/types.c
index cb343be..c1d235e 100644
--- a/src/types.c
+++ b/src/types.c
@@ -24,6 +24,7 @@
  *  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 
  */
 
+#include <stddef.h>
 #include <stdlib.h>
 
 #include <sys/types.h>
@@ -50,8 +51,9 @@
  * _inaddr                    (pa,di,cs
  *				+search_sortlist, dip_genaddr, csp_genaddr)
  * _in6addr		      (pa,di,cs)
- * _addr                      (pa,di,div,csp,cs,gsz
- *				+search_sortlist_sa, dip_sockaddr)
+ * _addr                      (pap,pa,di,div,csp,cs,gsz,qs
+ *				+search_sortlist_sa, dip_sockaddr,
+ *				 addr_rrtypes, addr_submit, icb_addr)
  * _domain                    (pap,csp,cs)
  * _dom_raw		      (pa)
  * _host_raw                  (pa)
@@ -342,19 +344,114 @@ static adns_status cs_in6addr(vbuf *vb, const void *datap) {
 }
 
 /*
- * _addr   (pa,di,div,csp,cs,gsz +search_sortlist_sa, dip_sockaddr)
+ * _addr   (pap,pa,di,div,csp,cs,gsz,qs
+ *		+search_sortlist_sa, dip_sockaddr, addr_rrtypes,
+ *		 addr_submit, icb_addr)
  */
 
-static adns_status pa_addr(const parseinfo *pai, int cbyte,
-			   int max, void *datap) {
-  adns_rr_addr *storeto= datap;
+static const typeinfo tinfo_addrsub;
+
+#define ADDR_RRTYPES(_) _(a) _(aaaa)
+
+static const adns_rrtype addr_all_rrtypes[] = {
+#define RRTY_CODE(ty) adns_r_##ty,
+  ADDR_RRTYPES(RRTY_CODE)
+#undef RRTY_CODE
+};
+
+enum {
+#define RRTY_INDEX(ty) addr__ri_##ty,
+  ADDR_RRTYPES(RRTY_INDEX)
+#undef RRTY_INDEX
+  addr_nrrtypes,
+#define RRTY_FLAG(ty) addr_rf_##ty = 1 << addr__ri_##ty,
+  ADDR_RRTYPES(RRTY_FLAG)
+  addr__rrty_hunoz
+#undef RRTY_FLAG
+};
+
+static unsigned addr_rrtypeflag(adns_rrtype type) {
+  int i;
+
+  type &= adns_rrt_typemask;
+  for (i=0; i<addr_nrrtypes && type!=addr_all_rrtypes[i]; i++);
+  return i < addr_nrrtypes ? 1 << i : 0;
+}
+
+/* About CNAME handling in addr queries.
+ *
+ * A user-level addr query is translated into a number of protocol-level
+ * queries, and its job is to reassemble the results.  This gets tricky if
+ * the answers aren't consistent.  In particular, if the answers report
+ * inconsistent indirection via CNAME records (e.g., different CNAMEs, or
+ * some indirect via a CNAME, and some don't) then we have trouble.
+ *
+ * Once we've received an answer, even if it was NODATA, we set
+ * adns__qf_addr_answer on the parent query.  This will let us detect a
+ * conflict between a no-CNAME-with-NODATA reply and a subsequent CNAME.
+ *
+ * If we detect a conflict of any kind, then at least one answer came back
+ * with a CNAME record, so we pick the first such answer (somewhat
+ * arbitrarily) as being the `right' canonical name, and set this in the
+ * parent query's answer->cname slot.  We discard address records from the
+ * wrong name.  And finally we cancel the outstanding child queries, and
+ * resubmit address queries for the address families we don't yet have, with
+ * adns__qf_addr_cname set so that we know that we're in the fixup state.
+ */
+
+static adns_status pap_addr(const parseinfo *pai, int rrty, size_t rrsz,
+			    int *cbyte_io, int max, adns_rr_addr *storeto) {
   const byte *dgram= pai->dgram;
+  int af, addrlen, salen;
+  struct in6_addr v6map;
+  const void *oaddr= dgram + *cbyte_io;
+  int avail= max - *cbyte_io;
+  int step= -1;
+  void *addrp= 0;
+
+  switch (rrty) {
+  case adns_r_a:
+    if ((pai->qu->flags & adns_qf_ipv6_mapv4) &&
+	(pai->qu->answer->type & adns__qtf_bigaddr)) {
+      if (avail < 4) return adns_s_invaliddata;
+      memset(v6map.s6_addr +  0, 0x00, 10);
+      memset(v6map.s6_addr + 10, 0xff,  2);
+      memcpy(v6map.s6_addr + 12, oaddr, 4);
+      oaddr= v6map.s6_addr; avail= sizeof(v6map.s6_addr);
+      if (step < 0) step= 4;
+      goto aaaa;
+    }
+    af= AF_INET; addrlen= 4;
+    addrp= &storeto->addr.inet.sin_addr;
+    salen= sizeof(storeto->addr.inet);
+    break;
+  case adns_r_aaaa:
+  aaaa:
+    af= AF_INET6; addrlen= 16;
+    addrp= storeto->addr.inet6.sin6_addr.s6_addr;
+    salen= sizeof(storeto->addr.inet6);
+    break;
+  }
+  assert(addrp);
+
+  assert(offsetof(adns_rr_addr, addr) + salen <= rrsz);
+  if (addrlen < avail) return adns_s_invaliddata;
+  if (step < 0) step= addrlen;
+  *cbyte_io += step;
+  memset(&storeto->addr, 0, salen);
+  storeto->len= salen;
+  storeto->addr.sa.sa_family= af;
+  memcpy(addrp, oaddr, addrlen);
 
-  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;
-  memcpy(&storeto->addr.inet.sin_addr,dgram+cbyte,4);
+  return adns_s_ok;
+}
+
+static adns_status pa_addr(const parseinfo *pai, int cbyte,
+			   int max, void *datap) {
+  int err= pap_addr(pai, pai->qu->answer->type & adns_rrt_typemask,
+		    pai->qu->answer->rrsz, &cbyte, max, datap);
+  if (err) return err;
+  if (cbyte != max) return adns_s_invaliddata;
   return adns_s_ok;
 }
 
@@ -417,6 +514,228 @@ static int gsz_addr(const typeinfo *typei, adns_rrtype type) {
     sizeof(adns_rr_addr) : sizeof(adns_rr_addr_v4only);
 }
 
+static unsigned addr_rrtypes(adns_state ads, adns_rrtype type,
+			     adns_queryflags qf) {
+  /* Return a mask of addr_rf_... flags indicating which address families are
+   * wanted, given a query type and flags.
+   */
+  return addr_rf_a;
+}
+
+static void icb_addr(adns_query parent, adns_query child);
+
+static void addr_subqueries(adns_query qu, struct timeval now,
+			    adns_queryflags qf_extra,
+			    const byte *qd_dgram, int qd_dglen) {
+  int i, err, id;
+  adns_query cqu;
+  adns_queryflags qf= (qu->flags & ~adns_qf_search) | qf_extra;
+  adns_rrtype qtf= qu->answer->type & adns__qtf_deref;
+  unsigned which= qu->ctx.tinfo.addr.want & ~qu->ctx.tinfo.addr.have;
+  qcontext ctx;
+
+  memset(&ctx, 0, sizeof(ctx));
+  ctx.callback= icb_addr;
+  for (i=0; i<addr_nrrtypes; i++) {
+    if (!(which & (1 << i))) continue;
+    err= adns__mkquery_frdgram(qu->ads, &qu->vb, &id, qd_dgram,qd_dglen,
+			       DNS_HDRSIZE, addr_all_rrtypes[i], qf);
+    if (err) goto x_error;
+    err= adns__internal_submit(qu->ads, &cqu, qu, &tinfo_addrsub,
+			       addr_all_rrtypes[i] | qtf,
+			       &qu->vb, id, qf, now, &ctx);
+    if (err) goto x_error;
+    cqu->answer->rrsz= qu->answer->rrsz;
+  }
+  qu->state= query_childw;
+  LIST_LINK_TAIL(qu->ads->childw, qu);
+  return;
+
+x_error:
+  adns__query_fail(qu, err);
+}
+
+static adns_status addr_submit(adns_query parent, adns_query *query_r,
+			       vbuf *qumsg_vb, int id, unsigned want,
+			       adns_queryflags flags, struct timeval now,
+			       qcontext *ctx) {
+  /* This is effectively a substitute for adns__internal_submit, intended for
+   * the case where the caller (possibly) only wants a subset of the
+   * available record types.  The memory management and callback rules are
+   * the same as for adns__internal_submit.
+   *
+   * Some differences: the query is linked onto the parent's children list
+   * before exit (though the parent's state is not changed, and it is not
+   * linked into the childw list queue); and we fiddle with the `tinfo'
+   * portion of the context structure (yes, modifying *ctx), since this is,
+   * in fact, the main purpose of this function.
+   */
+
+  adns_state ads= parent->ads;
+  adns_query qu;
+  adns_status err;
+  adns_rrtype type= ((adns_r_addr & adns_rrt_reprmask) |
+		     (parent->answer->type & ~adns_rrt_reprmask));
+
+  ctx->tinfo.addr.want= want;
+  ctx->tinfo.addr.have= 0;
+  err= adns__internal_submit(ads, &qu, parent, adns__findtype(adns_r_addr),
+			     type, qumsg_vb, id, flags, now, ctx);
+  if (err) return err;
+
+  *query_r= qu;
+  return adns_s_ok;
+}
+
+static adns_status append_addrs(adns_query qu, size_t rrsz,
+				adns_rr_addr **dp, int *dlen,
+				const adns_rr_addr *sp, int slen) {
+  /* Append a vector of slen addr records, each of size rrsz, starting at ap,
+   * to a vector starting at *dp, of length *dlen.  On successful completion,
+   * *dp and *dlen are updated.
+   */
+
+  size_t drrsz= *dlen*rrsz, srrsz= slen*rrsz;
+  byte *p;
+
+  if (!slen) return adns_s_ok;
+  p= adns__alloc_interim(qu, drrsz + srrsz);
+  if (!p) R_NOMEM;
+  if (*dlen) {
+    memcpy(p, *dp, drrsz);
+    adns__free_interim(qu, *dp);
+  }
+  memcpy(p + drrsz, sp, srrsz);
+  *dlen += slen;
+  *dp= (adns_rr_addr *)p;
+  return adns_s_ok;
+}
+
+static void propagate_ttl(adns_query to, adns_query from)
+  { if (to->expires > from->expires) to->expires= from->expires; }
+
+static adns_status copy_cname_from_child(adns_query parent, adns_query child) {
+  adns_answer *pans= parent->answer, *cans= child->answer;
+  size_t n= strlen(cans->cname) + 1;
+
+  pans->cname= adns__alloc_preserved(parent, n);
+  if (!pans->cname) R_NOMEM;
+  memcpy(pans->cname, cans->cname, n);
+  return adns_s_ok;
+}
+
+static void done_addr_type(adns_query qu, adns_rrtype type) {
+  unsigned f= addr_rrtypeflag(type);
+  assert(f); qu->ctx.tinfo.addr.have |= f;
+}
+
+static void icb_addr(adns_query parent, adns_query child) {
+  adns_state ads= parent->ads;
+  adns_answer *pans= parent->answer, *cans= child->answer;
+  struct timeval now;
+  adns_status err;
+  adns_queryflags qf;
+  int id;
+
+  propagate_ttl(parent, child);
+
+  if (!(child->flags & adns__qf_addr_cname) &&
+      (parent->flags & adns__qf_addr_answer) &&
+      (!!pans->cname != !!cans->cname ||
+       (pans->cname && strcmp(pans->cname, cans->cname)))) {
+    /* We've detected an inconsistency in CNAME records, and must deploy
+     * countermeasures.
+     */
+
+    if (!pans->cname) {
+      /* The child has a CNAME record, but the parent doesn't.  We must
+       * discard all of the parent's addresses, and substitute the child's.
+       */
+
+      assert(pans->rrsz == cans->rrsz);
+      adns__free_interim(parent, pans->rrs.bytes);
+      adns__transfer_interim(child, parent, cans->rrs.bytes);
+      pans->rrs.bytes= cans->rrs.bytes;
+      pans->nrrs= cans->nrrs;
+      parent->ctx.tinfo.addr.have= 0;
+      done_addr_type(parent, cans->type);
+      err= copy_cname_from_child(parent, child); if (err) goto x_err;
+    }
+
+    /* We've settled on the CNAME (now) associated with the parent, which
+     * already has appropriate address records.  Build a query datagram for
+     * this name so that we can issue child queries for the missing address
+     * families.  The child's vbuf looks handy for this.
+     */
+    err= adns__mkquery(ads, &child->vb, &id, pans->cname,
+		       strlen(pans->cname), &tinfo_addrsub,
+		       adns_r_addr, parent->flags);
+    if (err) goto x_err;
+
+    /* Now cancel the remaining children, and try again with the CNAME we've
+     * settled on.
+     */
+    adns__cancel_children(parent);
+    if (gettimeofday(&now, 0)) goto x_gtod;
+    qf= adns__qf_addr_cname;
+    if (!(parent->flags & adns_qf_cname_loose)) qf |= adns_qf_cname_forbid;
+    addr_subqueries(parent, now, qf, child->vb.buf, child->vb.used);
+    return;
+  }
+
+  if (cans->cname && !pans->cname) {
+    err= copy_cname_from_child(parent, child);
+    if (err) goto x_err;
+  }
+
+  if ((parent->flags & adns_qf_search) &&
+      !pans->cname && cans->status == adns_s_nxdomain) {
+    /* We're searching a list of suffixes, and the name doesn't exist.  Try
+     * the next one.
+     */
+
+    adns__cancel_children(parent);
+    adns__free_interim(parent, pans->rrs.bytes);
+    pans->rrs.bytes= 0; pans->nrrs= 0;
+    if (gettimeofday(&now, 0)) goto x_gtod;
+    adns__search_next(ads, parent, now);
+    return;
+  }
+
+  if (cans->status && cans->status != adns_s_nodata)
+    { err= cans->status; goto x_err; }
+
+  assert(pans->rrsz == cans->rrsz);
+  err= append_addrs(parent, pans->rrsz,
+		    &pans->rrs.addr, &pans->nrrs,
+		    cans->rrs.addr, cans->nrrs);
+  if (err) goto x_err;
+  done_addr_type(parent, cans->type);
+
+  if (parent->children.head) LIST_LINK_TAIL(ads->childw, parent);
+  else if (!pans->nrrs) adns__query_fail(parent, adns_s_nodata);
+  else adns__query_done(parent);
+  parent->flags |= adns__qf_addr_answer;
+  return;
+
+x_gtod:
+  adns__diag(ads, -1, parent, "gettimeofday failed: %s", strerror(errno));
+  err= adns_s_systemfail;
+  goto x_err;
+
+x_err:
+  adns__query_fail(parent, err);
+}
+
+static void qs_addr(adns_query qu, struct timeval now) {
+  if (!qu->ctx.tinfo.addr.want) {
+    qu->ctx.tinfo.addr.want= addr_rrtypes(qu->ads, qu->answer->type,
+					  qu->flags);
+    qu->ctx.tinfo.addr.have= 0;
+  }
+  addr_subqueries(qu, now, 0, qu->query_dgram, qu->query_dglen);
+}
+
 /*
  * _domain      (pap,csp,cs)
  * _dom_raw     (pa)
@@ -487,42 +806,45 @@ static adns_status pa_host_raw(const parseinfo *pai, int cbyte,
  */
 
 static adns_status pap_findaddrs(const parseinfo *pai, adns_rr_hostaddr *ha,
-				 size_t addrsz,
+				 unsigned *want_io, size_t addrsz,
 				 int *cbyte_io, int count, int dmstart) {
   int rri, naddrs;
-  int type, class, rdlen, rdstart, ownermatched;
+  unsigned typef, want= *want_io, need= want;
+  int type, class, rdlen, rdend, rdstart, ownermatched;
   unsigned long ttl;
   adns_status st;
   
-  for (rri=0, naddrs=-1; rri<count; rri++) {
+  for (rri=0, naddrs=0; rri<count; rri++) {
     st= adns__findrr_anychk(pai->qu, pai->serv, pai->dgram,
 			    pai->dglen, cbyte_io,
 			    &type, &class, &ttl, &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)*addrsz))
-      R_NOMEM;
+    if (!ownermatched || class != DNS_CLASS_IN) continue;
+    typef= addr_rrtypeflag(type);
+    if (!(want & typef)) continue;
+    need &= ~typef;
+    if (!adns__vbuf_ensure(&pai->qu->vb, (naddrs+1)*addrsz)) R_NOMEM;
     adns__update_expires(pai->qu,ttl,pai->now);
-    st= pa_addr(pai, rdstart,rdstart+rdlen, pai->qu->vb.buf + naddrs*addrsz);
+    rdend= rdstart + rdlen;
+    st= pap_addr(pai, type, addrsz, &rdstart, rdend,
+		 (adns_rr_addr *)(pai->qu->vb.buf + naddrs*addrsz));
     if (st) return st;
+    if (rdstart != rdend) return adns_s_invaliddata;
     naddrs++;
   }
-  if (naddrs >= 0) {
-    ha->addrs= adns__alloc_interim(pai->qu, naddrs*addrsz);
-    if (!ha->addrs) R_NOMEM;
-    memcpy(ha->addrs, pai->qu->vb.buf, naddrs*addrsz);
-    ha->naddrs= naddrs;
+  if (naddrs > 0) {
+    st= append_addrs(pai->qu, addrsz, &ha->addrs, &ha->naddrs,
+		     (const adns_rr_addr *)pai->qu->vb.buf, naddrs);
+    if (st) return st;
     ha->astatus= adns_s_ok;
 
-    adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf,
-		div_addr, pai->ads);
+    if (!need) {
+      adns__isort(ha->addrs, naddrs, addrsz, pai->qu->vb.buf,
+		  div_addr, pai->ads);
+    }
   }
+  *want_io= need;
   return adns_s_ok;
 }
 
@@ -531,13 +853,31 @@ static void icb_hostaddr(adns_query parent, adns_query child) {
   adns_rr_hostaddr *rrp= child->ctx.pinfo.hostaddr;
   adns_state ads= parent->ads;
   adns_status st;
+  size_t addrsz= gsz_addr(0, parent->answer->type);
+
+  st= cans->status == adns_s_nodata ? adns_s_ok : cans->status;
+  if (st) goto done;
+  propagate_ttl(parent, child);
+
+  assert(addrsz == cans->rrsz);
+  st= append_addrs(parent, addrsz,
+		   &rrp->addrs, &rrp->naddrs,
+		   cans->rrs.addr, cans->nrrs);
+  if (st) goto done;
+  if (!rrp->naddrs) { st= adns_s_nodata; goto done; }
+
+  if (!adns__vbuf_ensure(&parent->vb, addrsz))
+    { st= adns_s_nomemory; goto done; }
+  adns__isort(rrp->addrs, rrp->naddrs, addrsz, parent->vb.buf,
+	      div_addr, ads);
+
+done:
+  if (st) {
+    adns__free_interim(parent, rrp->addrs);
+    rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : 0;
+  }
 
-  st= cans->status;
   rrp->astatus= st;
-  rrp->naddrs= (st>0 && st<=adns_s_max_tempfail) ? -1 : cans->nrrs;
-  rrp->addrs= cans->rrs.addr;
-  adns__transfer_interim(child, parent, rrp->addrs);
-
   if (parent->children.head) {
     LIST_LINK_TAIL(ads->childw,parent);
   } else {
@@ -553,6 +893,7 @@ static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
   int id;
   adns_query nqu;
   adns_queryflags nflags;
+  unsigned want;
   size_t addrsz= gsz_addr(0, pai->qu->answer->type);
 
   dmstart= cbyte= *cbyte_io;
@@ -562,18 +903,20 @@ static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
   *cbyte_io= cbyte;
 
   rrp->astatus= adns_s_ok;
-  rrp->naddrs= -1;
+  rrp->naddrs= 0;
   rrp->addrs= 0;
 
   cbyte= pai->nsstart;
 
-  st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->nscount, dmstart);
+  want= addr_rrtypes(pai->ads, pai->qu->answer->type, pai->qu->flags);
+
+  st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->nscount, dmstart);
   if (st) return st;
-  if (rrp->naddrs != -1) return adns_s_ok;
+  if (!want) return adns_s_ok;
 
-  st= pap_findaddrs(pai, rrp,addrsz, &cbyte, pai->arcount, dmstart);
+  st= pap_findaddrs(pai, rrp, &want, addrsz, &cbyte, pai->arcount, dmstart);
   if (st) return st;
-  if (rrp->naddrs != -1) return adns_s_ok;
+  if (!want) return adns_s_ok;
 
   st= adns__mkquery_frdgram(pai->ads, &pai->qu->vb, &id,
 			    pai->dgram, pai->dglen, dmstart,
@@ -583,16 +926,12 @@ static adns_status pap_hostaddr(const parseinfo *pai, int *cbyte_io,
   ctx.ext= 0;
   ctx.callback= icb_hostaddr;
   ctx.pinfo.hostaddr= rrp;
-  memset(&ctx.tinfo, 0, sizeof(ctx.tinfo));
   
-  nflags= adns_qf_quoteok_query;
+  nflags= adns_qf_quoteok_query | (pai->qu->flags & adns_qf_ipv6_mapv4);
   if (!(pai->qu->flags & adns_qf_cname_loose)) nflags |= adns_qf_cname_forbid;
   
-  st= adns__internal_submit(pai->ads, &nqu, pai->qu,
-			    adns__findtype(adns_r_addr),
-			    ((adns_r_addr & adns_rrt_reprmask) |
-			     (pai->qu->answer->type & ~adns_rrt_reprmask)),
-			    &pai->qu->vb, id, nflags, pai->now, &ctx);
+  st= addr_submit(pai->qu, &nqu, &pai->qu->vb, id, want,
+		  nflags, pai->now, &ctx);
   if (st) return st;
 
   return adns_s_ok;
@@ -1309,7 +1648,7 @@ DEEP_TYPE(srv_raw,"SRV",  "raw",srvraw ,   srvraw,  srv,   srvraw,
 			      .checklabel= ckl_srv, .postsort= postsort_srv),
 
 FLAT_TYPE(addr,   "A",  "addr", addr,      addr,    addr,  addr,
-							 .getrrsz= gsz_addr),
+				   .getrrsz= gsz_addr, .query_send= qs_addr),
 DEEP_TYPE(ns,     "NS", "+addr",hostaddr,  hostaddr,hostaddr,hostaddr      ),
 DEEP_TYPE(ptr,    "PTR","checked",str,     ptr,     0,     domain,
 						       .checklabel= ckl_ptr),
@@ -1321,6 +1660,10 @@ DEEP_TYPE(soa,    "SOA","822",  soa,       soa,     0,     soa             ),
 DEEP_TYPE(rp,     "RP", "822",  strpair,   rp,      0,     rp              ),
 };
 
+static const typeinfo tinfo_addrsub =
+FLAT_TYPE(none,	  "<addr>","sub",addr,	   addr,    0,	   addr,
+							 .getrrsz= gsz_addr);
+
 static const typeinfo typeinfo_unknown=
 DEEP_TYPE(unknown,0, "unknown",byteblock,opaque,  0,     opaque            );