+adns_status adns__internal_submit(adns_state ads, adns_query *query_r,
+ const typeinfo *typei, adns_rrtype type,
+ vbuf *qumsg_vb, int id,
+ adns_queryflags flags, struct timeval now,
+ qcontext *ctx);
+/* Submits a query (for internal use, called during external submits).
+ *
+ * The new query is returned in *query_r, or we return adns_s_nomemory.
+ *
+ * The query datagram should already have been assembled in qumsg_vb;
+ * the memory for it is _taken over_ by this routine whether it
+ * succeeds or fails (if it succeeds, the vbuf is reused for qu->vb).
+ *
+ * *ctx is copied byte-for-byte into the query. Before doing this, its tinfo
+ * field may be modified by type hooks.
+ *
+ * When the child query is done, ctx->callback will be called. The
+ * child will already have been taken off both the global list of
+ * queries in ads and the list of children in the parent. The child
+ * will be freed when the callback returns. The parent will have been
+ * taken off the global childw queue.
+ *
+ * The callback should either call adns__query_done, if it is
+ * complete, or adns__query_fail, if an error has occurred, in which
+ * case the other children (if any) will be cancelled. If the parent
+ * has more unfinished children (or has just submitted more) then the
+ * callback may choose to wait for them - it must then put the parent
+ * back on the childw queue.
+ */
+
+void adns__search_next(adns_state ads, adns_query qu, struct timeval now);
+/* Walks down the searchlist for a query with adns_qf_search.
+ * The query should have just had a negative response, or not had
+ * any queries sent yet, and should not be on any queue.
+ * The query_dgram if any will be freed and forgotten and a new
+ * one constructed from the search_* members of the query.
+ *
+ * Cannot fail (in case of error, calls adns__query_fail).
+ */
+
+void *adns__alloc_interim(adns_query qu, size_t sz);
+void *adns__alloc_preserved(adns_query qu, size_t sz);
+/* Allocates some memory, and records which query it came from
+ * and how much there was.
+ *
+ * If an error occurs in the query, all the memory from _interim is
+ * simply freed. If the query succeeds, one large buffer will be made
+ * which is big enough for all these allocations, and then
+ * adns__alloc_final will get memory from this buffer.
+ *
+ * _alloc_interim can fail (and return 0).
+ * The caller must ensure that the query is failed.
+ *
+ * The memory from _preserved is is kept and transferred into the
+ * larger buffer - unless we run out of memory, in which case it too
+ * is freed. When you use _preserved you have to add code to the
+ * x_nomem error exit case in adns__makefinal_query to clear out the
+ * pointers you made to those allocations, because that's when they're
+ * thrown away; you should also make a note in the declaration of
+ * those pointer variables, to note that they are _preserved rather
+ * than _interim. If they're in the answer, note it here:
+ * answer->cname and answer->owner are _preserved.
+ */
+
+void adns__transfer_interim(adns_query from, adns_query to, void *block);
+/* Transfers an interim allocation from one query to another, so that
+ * the `to' query will have room for the data when we get to makefinal
+ * and so that the free will happen when the `to' query is freed
+ * rather than the `from' query.
+ *
+ * It is legal to call adns__transfer_interim with a null pointer; this
+ * has no effect.
+ *
+ * _transfer_interim also ensures that the expiry time of the `to' query
+ * is no later than that of the `from' query, so that child queries'
+ * TTLs get inherited by their parents.
+ */
+
+void *adns__alloc_mine(adns_query qu, size_t sz);
+/* Like _interim, but does not record the length for later
+ * copying into the answer. This just ensures that the memory
+ * will be freed when we're done with the query.
+ */
+
+void *adns__alloc_final(adns_query qu, size_t sz);
+/* Cannot fail, and cannot return 0.
+ */
+
+void adns__makefinal_block(adns_query qu, void **blpp, size_t sz);
+void adns__makefinal_str(adns_query qu, char **strp);
+
+void adns__reset_preserved(adns_query qu);
+/* Resets all of the memory management stuff etc. to take account of
+ * only the _preserved stuff from _alloc_preserved. Used when we find
+ * an error somewhere and want to just report the error (with perhaps
+ * CNAME, owner, etc. info), and also when we're halfway through RRs
+ * in a datagram and discover that we need to retry the query.
+ */
+
+void adns__query_done(adns_query qu);
+void adns__query_fail(adns_query qu, adns_status stat);
+
+/* From reply.c: */
+
+void adns__procdgram(adns_state ads, const byte *dgram, int len,
+ int serv, int viatcp, struct timeval now);
+/* This function is allowed to cause new datagrams to be constructed
+ * and sent, or even new queries to be started. However,
+ * query-sending functions are not allowed to call any general event
+ * loop functions in case they accidentally call this.
+ *
+ * Ie, receiving functions may call sending functions.
+ * Sending functions may NOT call receiving functions.
+ */
+
+/* From types.c: */
+
+const typeinfo *adns__findtype(adns_rrtype type);
+
+/* From parse.c: */
+
+typedef struct {
+ adns_state ads;
+ adns_query qu;
+ int serv;
+ const byte *dgram;
+ int dglen, max, cbyte, namelen;
+ int *dmend_r;
+} findlabel_state;
+
+void adns__findlabel_start(findlabel_state *fls, adns_state ads,
+ int serv, adns_query qu,
+ const byte *dgram, int dglen, int max,
+ int dmbegin, int *dmend_rlater);
+/* Finds labels in a domain in a datagram.
+ *
+ * Call this routine first.
+ * dmend_rlater may be null. ads (and of course fls) may not be.
+ * serv may be -1, qu may be null - they are for error reporting.
+ */
+
+adns_status adns__findlabel_next(findlabel_state *fls,
+ int *lablen_r, int *labstart_r);
+/* Then, call this one repeatedly.
+ *
+ * It will return adns_s_ok if all is well, and tell you the length
+ * and start of successive labels. labstart_r may be null, but
+ * lablen_r must not be.
+ *
+ * After the last label, it will return with *lablen_r zero.
+ * Do not then call it again; instead, just throw away the findlabel_state.
+ *
+ * *dmend_rlater will have been set to point to the next part of
+ * the datagram after the label (or after the uncompressed part,
+ * if compression was used). *namelen_rlater will have been set
+ * to the length of the domain name (total length of labels plus
+ * 1 for each intervening dot).
+ *
+ * If the datagram appears to be truncated, *lablen_r will be -1.
+ * *dmend_rlater, *labstart_r and *namelen_r may contain garbage.
+ * Do not call _next again.
+ *
+ * There may also be errors, in which case *dmend_rlater,
+ * *namelen_rlater, *lablen_r and *labstart_r may contain garbage.
+ * Do not then call findlabel_next again.
+ */
+
+typedef enum {
+ pdf_quoteok= 0x001
+} parsedomain_flags;
+
+adns_status adns__parse_domain(adns_state ads, int serv, adns_query qu,
+ vbuf *vb, parsedomain_flags flags,
+ const byte *dgram, int dglen, int *cbyte_io,
+ int max);
+/* vb must already have been initialised; it will be reset if necessary.
+ * If there is truncation, vb->used will be set to 0; otherwise
+ * (if there is no error) vb will be null-terminated.
+ * If there is an error vb and *cbyte_io may be left indeterminate.
+ *
+ * serv may be -1 and qu may be 0 - they are used for error reporting only.
+ */
+
+adns_status adns__parse_domain_more(findlabel_state *fls, adns_state ads,
+ adns_query qu, vbuf *vb,
+ parsedomain_flags flags,
+ const byte *dgram);
+/* Like adns__parse_domain, but you pass it a pre-initialised findlabel_state,
+ * for continuing an existing domain or some such of some kind. Also, unlike
+ * _parse_domain, the domain data will be appended to vb, rather than replacing
+ * the existing contents.
+ */
+
+adns_status adns__findrr(adns_query qu, int serv,
+ const byte *dgram, int dglen, int *cbyte_io,
+ int *type_r, int *class_r, unsigned long *ttl_r,
+ int *rdlen_r, int *rdstart_r,
+ int *ownermatchedquery_r);
+/* Finds the extent and some of the contents of an RR in a datagram
+ * and does some checks. The datagram is *dgram, length dglen, and
+ * the RR starts at *cbyte_io (which is updated afterwards to point
+ * to the end of the RR).
+ *
+ * The type, class, TTL and RRdata length and start are returned iff
+ * the corresponding pointer variables are not null. type_r, class_r
+ * and ttl_r may not be null. The TTL will be capped.
+ *
+ * If ownermatchedquery_r != 0 then the owner domain of this
+ * RR will be compared with that in the query (or, if the query
+ * has gone to a CNAME lookup, with the canonical name).
+ * In this case, *ownermatchedquery_r will be set to 0 or 1.
+ * The query datagram (or CNAME datagram) MUST be valid and not truncated.
+ *
+ * If there is truncation then *type_r will be set to -1 and
+ * *cbyte_io, *class_r, *rdlen_r, *rdstart_r and *eo_matched_r will be
+ * undefined.
+ *
+ * qu must obviously be non-null.
+ *
+ * If an error is returned then *type_r will be undefined too.
+ */
+
+adns_status adns__findrr_anychk(adns_query qu, int serv,
+ const byte *dgram, int dglen, int *cbyte_io,
+ int *type_r, int *class_r,
+ unsigned long *ttl_r,
+ int *rdlen_r, int *rdstart_r,
+ const byte *eo_dgram, int eo_dglen,
+ int eo_cbyte, int *eo_matched_r);
+/* Like adns__findrr_checked, except that the datagram and
+ * owner to compare with can be specified explicitly.
+ *
+ * If the caller thinks they know what the owner of the RR ought to
+ * be they can pass in details in eo_*: this is another (or perhaps
+ * the same datagram), and a pointer to where the putative owner
+ * starts in that datagram. In this case *eo_matched_r will be set
+ * to 1 if the datagram matched or 0 if it did not. Either
+ * both eo_dgram and eo_matched_r must both be non-null, or they
+ * must both be null (in which case eo_dglen and eo_cbyte will be ignored).
+ * The eo datagram and contained owner domain MUST be valid and
+ * untruncated.
+ */
+
+void adns__update_expires(adns_query qu, unsigned long ttl,
+ struct timeval now);
+/* Updates the `expires' field in the query, so that it doesn't exceed
+ * now + ttl.
+ */
+
+int vbuf__append_quoted1035(vbuf *vb, const byte *buf, int len);
~mdw / adns / blobdiff