vendor/krb5/1.15.1

1 files changed, 135 insertions, 0 deletions

diff --git a/src/include/socket-utils.h b/src/include/socket-utils.h
new file mode 100644
index 000000000000..156663683047
--- /dev/null
+++ b/src/include/socket-utils.h
@@ -0,0 +1,135 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/*
+ * Copyright (C) 2001,2005 by the Massachusetts Institute of Technology,
+ * Cambridge, MA, USA.  All Rights Reserved.
+ *
+ * This software is being provided to you, the LICENSEE, by the
+ * Massachusetts Institute of Technology (M.I.T.) under the following
+ * license.  By obtaining, using and/or copying this software, you agree
+ * that you have read, understood, and will comply with these terms and
+ * conditions:
+ *
+ * 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 or
+ * royalty is hereby granted, provided that you agree to comply with the
+ * following copyright notice and statements, including the disclaimer, and
+ * that the same appear on ALL copies of the software and documentation,
+ * including modifications that you make for internal use or for
+ * distribution:
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS", AND M.I.T. MAKES NO REPRESENTATIONS
+ * OR WARRANTIES, EXPRESS OR IMPLIED.  By way of example, but not
+ * limitation, M.I.T. MAKES NO REPRESENTATIONS OR WARRANTIES OF
+ * MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF
+ * THE LICENSED SOFTWARE OR DOCUMENTATION WILL NOT INFRINGE ANY THIRD PARTY
+ * PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS.
+ *
+ * The name of the Massachusetts Institute of Technology or M.I.T. may NOT
+ * be used in advertising or publicity pertaining to distribution of the
+ * software.  Title to copyright in this software and any associated
+ * documentation shall at all times remain with M.I.T., and USER agrees to
+ * preserve same.
+ *
+ * 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.
+ */
+
+#ifndef SOCKET_UTILS_H
+#define SOCKET_UTILS_H
+
+/* Some useful stuff cross-platform for manipulating socket addresses.
+   We assume at least ipv4 sockaddr_in support.  The sockaddr_storage
+   stuff comes from the ipv6 socket api enhancements; socklen_t is
+   provided on some systems; the rest is just convenience for internal
+   use in the krb5 tree.
+
+   Do NOT install this file.  */
+
+/* for HAVE_SOCKLEN_T etc */
+#include "autoconf.h"
+/* for sockaddr_storage */
+#include "port-sockets.h"
+/* for "inline" if needed */
+#include "k5-platform.h"
+
+/*
+ * There's a lot of confusion between pointers to different sockaddr
+ * types, and pointers with different degrees of indirection, as in
+ * the locate_kdc type functions.  Use these function to ensure we
+ * don't do something silly like cast a "sockaddr **" to a
+ * "sockaddr_in *".
+ *
+ * The casts to (void *) are to get GCC to shut up about alignment
+ * increasing.
+ */
+static inline struct sockaddr_in *sa2sin (struct sockaddr *sa)
+{
+    return (struct sockaddr_in *) (void *) sa;
+}
+static inline struct sockaddr_in6 *sa2sin6 (struct sockaddr *sa)
+{
+    return (struct sockaddr_in6 *) (void *) sa;
+}
+static inline struct sockaddr *ss2sa (struct sockaddr_storage *ss)
+{
+    return (struct sockaddr *) ss;
+}
+static inline struct sockaddr_in *ss2sin (struct sockaddr_storage *ss)
+{
+    return (struct sockaddr_in *) ss;
+}
+static inline struct sockaddr_in6 *ss2sin6 (struct sockaddr_storage *ss)
+{
+    return (struct sockaddr_in6 *) ss;
+}
+
+/* Set the IPv4 or IPv6 port on sa to port.  Do nothing if sa is not an
+ * Internet socket. */
+static inline void
+sa_setport(struct sockaddr *sa, uint16_t port)
+{
+    if (sa->sa_family == AF_INET)
+        sa2sin(sa)->sin_port = htons(port);
+    else if (sa->sa_family == AF_INET6)
+        sa2sin6(sa)->sin6_port = htons(port);
+}
+
+/* Get the Internet port number of sa, or 0 if it is not an Internet socket. */
+static inline uint16_t
+sa_getport(struct sockaddr *sa)
+{
+    if (sa->sa_family == AF_INET)
+        return ntohs(sa2sin(sa)->sin_port);
+    else if (sa->sa_family == AF_INET6)
+        return ntohs(sa2sin6(sa)->sin6_port);
+    else
+        return 0;
+}
+
+/* Return true if sa is an IPv4 or IPv6 socket address. */
+static inline int
+sa_is_inet(struct sockaddr *sa)
+{
+    return sa->sa_family == AF_INET || sa->sa_family == AF_INET6;
+}
+
+/* Return the length of an IPv4 or IPv6 socket structure; abort if it is
+ * neither. */
+static inline socklen_t
+sa_socklen(struct sockaddr *sa)
+{
+    if (sa->sa_family == AF_INET6)
+        return sizeof(struct sockaddr_in6);
+    else if (sa->sa_family == AF_INET)
+        return sizeof(struct sockaddr_in);
+    else
+        abort();
+}
+
+#endif /* SOCKET_UTILS_H */