1 files changed, 58 insertions, 0 deletions
diff --git a/src/lib/apputils/udppktinfo.h b/src/lib/apputils/udppktinfo.h
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index 0000000000000..b0c7ea36b7b91
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+++ b/src/lib/apputils/udppktinfo.h
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+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/*
+ * Copyright 2016 by the Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ * require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+#ifndef UDPPKTINFO_H
+#define UDPPKTINFO_H
+
+#include "k5-int.h"
+
+/*
+ * This holds whatever additional information might be needed to
+ * properly send back to the client from the correct local address.
+ *
+ * In this case, we only need one datum so far: On Mac OS X, the
+ * kernel doesn't seem to like sending from link-local addresses
+ * unless we specify the correct interface.
+ */
+typedef union aux_addressing_info
+{
+    int ipv6_ifindex;
+} aux_addressing_info;
+
+krb5_error_code
+set_pktinfo(int sock, int family);
+
+krb5_error_code
+recv_from_to(int sock, void *buf, size_t len, int flags,
+             struct sockaddr *from, socklen_t *fromlen,
+             struct sockaddr *to, socklen_t *tolen,
+             aux_addressing_info *auxaddr);
+
+krb5_error_code
+send_to_from(int sock, void *buf, size_t len, int flags,
+             const struct sockaddr *to, socklen_t tolen, struct sockaddr *from,
+             socklen_t fromlen, aux_addressing_info *auxaddr);
+
+#endif /* UDPPKTINFO_H */