1 files changed, 119 insertions, 0 deletions
diff --git a/REORG.TODO/inet/net-internal.h b/REORG.TODO/inet/net-internal.h
new file mode 100644
index 0000000000..2b2632c7ba
--- /dev/null
+++ b/REORG.TODO/inet/net-internal.h
@@ -0,0 +1,119 @@
+/* Network-related functions for internal library use.
+   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 _NET_INTERNAL_H
+#define _NET_INTERNAL_H 1
+
+#include <arpa/inet.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <sys/time.h>
+
+int __inet6_scopeid_pton (const struct in6_addr *address,
+                          const char *scope, uint32_t *result)
+  internal_function attribute_hidden;
+libc_hidden_proto (__inet6_scopeid_pton)
+
+
+/* Deadline handling for enforcing timeouts.
+
+   Code should call __deadline_current_time to obtain the current time
+   and cache it locally.  The cache needs updating after every
+   long-running or potentially blocking operation.  Deadlines relative
+   to the current time can be computed using __deadline_from_timeval.
+   The deadlines may have to be recomputed in response to certain
+   events (such as an incoming packet), but they are absolute (not
+   relative to the current time).  A timeout suitable for use with the
+   poll function can be computed from such a deadline using
+   __deadline_to_ms.
+
+   The fields in the structs defined belowed should only be used
+   within the implementation.  */
+
+/* Cache of the current time.  Used to compute deadlines from relative
+   timeouts and vice versa.  */
+struct deadline_current_time
+{
+  struct timespec current;
+};
+
+/* Return the current time.  Terminates the process if the current
+   time is not available.  */
+struct deadline_current_time __deadline_current_time (void)
+  internal_function attribute_hidden;
+
+/* Computed absolute deadline.  */
+struct deadline
+{
+  struct timespec absolute;
+};
+
+
+/* For internal use only.  */
+static inline bool
+__deadline_is_infinite (struct deadline deadline)
+{
+  return deadline.absolute.tv_nsec < 0;
+}
+
+/* Return true if the current time is at the deadline or past it.  */
+static inline bool
+__deadline_elapsed (struct deadline_current_time current,
+                    struct deadline deadline)
+{
+  return !__deadline_is_infinite (deadline)
+    && (current.current.tv_sec > deadline.absolute.tv_sec
+        || (current.current.tv_sec == deadline.absolute.tv_sec
+            && current.current.tv_nsec >= deadline.absolute.tv_nsec));
+}
+
+/* Return the deadline which occurs first.  */
+static inline struct deadline
+__deadline_first (struct deadline left, struct deadline right)
+{
+  if (__deadline_is_infinite (right)
+      || left.absolute.tv_sec < right.absolute.tv_sec
+      || (left.absolute.tv_sec == right.absolute.tv_sec
+          && left.absolute.tv_nsec < right.absolute.tv_nsec))
+    return left;
+  else
+    return right;
+}
+
+/* Add TV to the current time and return it.  Returns a special
+   infinite absolute deadline on overflow.  */
+struct deadline __deadline_from_timeval (struct deadline_current_time,
+                                         struct timeval tv)
+  internal_function attribute_hidden;
+
+/* Compute the number of milliseconds until the specified deadline,
+   from the current time in the argument.  The result is mainly for
+   use with poll.  If the deadline has already passed, return 0.  If
+   the result would overflow an int, return INT_MAX.  */
+int __deadline_to_ms (struct deadline_current_time, struct deadline)
+  internal_function attribute_hidden;
+
+/* Return true if TV.tv_sec is non-negative and TV.tv_usec is in the
+   interval [0, 999999].  */
+static inline bool
+__is_timeval_valid_timeout (struct timeval tv)
+{
+  return tv.tv_sec >= 0 && tv.tv_usec >= 0 && tv.tv_usec < 1000 * 1000;
+}
+
+#endif /* _NET_INTERNAL_H */