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dirmngr: New configure option --disable-libdns.

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* 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 <wk@gnupg.org>
This commit is contained in:
Werner Koch 2016-12-14 15:36:25 +01:00
parent 3c2a7918ea
commit d34a2bb410
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
9 changed files with 117 additions and 11 deletions
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7
dirmngr/dns-stuff.h
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@ -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);