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diff --git a/common/keyserver.h b/common/keyserver.h
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+/* keyserver.h - Public definitions for gpg keyserver helpers.
+ * Copyright (C) 2001, 2002, 2011 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of either
+ *
+ *   - the GNU Lesser General Public License as published by the Free
+ *     Software Foundation; either version 3 of the License, or (at
+ *     your option) any later version.
+ *
+ * or
+ *
+ *   - the GNU General Public License as published by the Free
+ *     Software Foundation; either version 2 of the License, or (at
+ *     your option) any later version.
+ *
+ * or both in parallel, as here.
+ *
+ * This file 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef GNUPG_COMMON_KEYSERVER_H
+#define GNUPG_COMMON_KEYSERVER_H
+
+#define KEYSERVER_PROTO_VERSION    1
+
+/* These are usable for return codes for the gpgkeys_ process, and
+   also KEY FAILED codes. */
+#define KEYSERVER_OK               0 /* not an error */
+#define KEYSERVER_INTERNAL_ERROR   1 /* gpgkeys_ internal error */
+#define KEYSERVER_NOT_SUPPORTED    2 /* operation not supported */
+#define KEYSERVER_VERSION_ERROR    3 /* VERSION mismatch */
+#define KEYSERVER_GENERAL_ERROR    4 /* keyserver internal error */
+#define KEYSERVER_NO_MEMORY        5 /* out of memory */
+#define KEYSERVER_KEY_NOT_FOUND    6 /* key not found */
+#define KEYSERVER_KEY_EXISTS       7 /* key already exists */
+#define KEYSERVER_KEY_INCOMPLETE   8 /* key incomplete (EOF) */
+#define KEYSERVER_UNREACHABLE      9 /* unable to contact keyserver */
+
+/* Must be 127 due to shell internal magic. */
+#define KEYSERVER_SCHEME_NOT_FOUND 127
+
+/* Object to hold information pertaining to a keyserver; it also
+   allows building a list of keyservers.  Note that g10/options.h has
+   a typedef for this.  FIXME: We should make use of the
+   parse_uri_t. */
+struct keyserver_spec
+{
+  struct keyserver_spec *next;
+  char *uri;
+  char *scheme;
+  char *auth;
+  char *host;
+  char *port;
+  char *path;
+  char *opaque;
+  strlist_t options;
+  struct
+  {
+    unsigned int direct_uri:1;
+  } flags;
+};
+
+
+#endif /*GNUPG_COMMON_KEYSERVER_H*/