dirmngr: New configure option --disable-libdns.

* configure.ac: Add option --disable-libdns
(USE_LIBDNS): New ac_subst and am_conditional.
(USE_C99_CFLAGS): Set only if libdns is used.
* dirmngr/Makefile.am (dirmngr_SOURCES): Move dns.c and dns.h to ...
(dirmngr_SOURCES) [USE_LIBDNS0: here.
(t_common_src): Ditto.
* dirmngr/dirmngr.c (oRecursiveResolver): New constant.
(opts): New option "--recursive-resolver".
(parse_rereadable_options): Set option.
* dirmngr/t-dns-stuff.c (main): Add option --recursive-resolver.
* dirmngr/server.c (cmd_getinfo): Depend output of "dnsinfo" on the
new variables.
* dirmngr/dns-stuff.c: Include dns.h only if USE_DNSLIB is defined.
Also build and call dnslib functions only if USE_DNSLIB is defined.
(recursive_resolver): New var.
(enable_recursive_resolver): New func.
(recursive_resolver_p): New func.
--

In case users run into problems building GnuPG, the configure option
allows to disable that support and continue w/o Tor support using the
system resolver.

--recursive-resolver was easy enough to implement and may be useful in
some situation.  It does not fully work, though.

Signed-off-by: Werner Koch <[email protected]>

1 files changed, 7 insertions, 0 deletions

diff --git a/dirmngr/dns-stuff.h b/dirmngr/dns-stuff.h
index c3c094611..20a4b41ef 100644
--- a/dirmngr/dns-stuff.h
+++ b/dirmngr/dns-stuff.h
@@ -100,6 +100,13 @@ void enable_standard_resolver (int yes);
 /* Return true if the standard resolver is used.  */
 int standard_resolver_p (void);
 
+/* Calling this function with YES switches libdns into recursive mode.
+ * It has no effect on the standard resolver.  */
+void enable_recursive_resolver (int yes);
+
+/* Return true iff the recursive resolver is used.  */
+int recursive_resolver_p (void);
+
 /* Calling this function switches the DNS code into Tor mode if
    possibe.  Return 0 on success.  */
 gpg_error_t enable_dns_tormode (int new_circuit);