Prepare for radical source tree reorganization.zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 59 insertions, 0 deletions

diff --git a/REORG.TODO/resolv/resolv-internal.h b/REORG.TODO/resolv/resolv-internal.h
new file mode 100644
index 0000000000..0d69ce10d3
--- /dev/null
+++ b/REORG.TODO/resolv/resolv-internal.h
@@ -0,0 +1,59 @@
+/* libresolv interfaces for internal use across glibc.
+   Copyright (C) 2016-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _RESOLV_INTERNAL_H
+#define _RESOLV_INTERNAL_H 1
+
+#include <resolv.h>
+#include <stdbool.h>
+
+/* Resolver flags.  Used for _flags in struct __res_state.  */
+#define RES_F_VC        0x00000001 /* Socket is TCP.  */
+#define RES_F_CONN      0x00000002 /* Socket is connected.  */
+#define RES_F_EDNS0ERR  0x00000004 /* EDNS0 caused errors.  */
+
+
+/* Internal version of RES_USE_INET6 which does not trigger a
+   deprecation warning.  */
+#define DEPRECATED_RES_USE_INET6 0x00002000
+
+static inline bool
+res_use_inet6 (void)
+{
+  return _res.options & DEPRECATED_RES_USE_INET6;
+}
+
+enum
+  {
+    /* The advertized EDNS buffer size.  The value 1200 is derived
+       from the IPv6 minimum MTU (1280 bytes) minus some arbitrary
+       space for tunneling overhead.  If the DNS server does not react
+       to ICMP Fragmentation Needed But DF Set messages, this should
+       avoid all UDP fragments on current networks.  Avoiding UDP
+       fragments is desirable because it prevents fragmentation-based
+       spoofing attacks because the randomness in a DNS packet is
+       concentrated in the first fragment (with the headers) and does
+       not protect subsequent fragments.  */
+    RESOLV_EDNS_BUFFER_SIZE = 1200,
+  };
+
+/* Add an OPT record to a DNS query.  */
+int __res_nopt (res_state, int n0, unsigned char *buf, int buflen,
+                int anslen) attribute_hidden;
+
+#endif  /* _RESOLV_INTERNAL_H */