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-rw-r--r--sys/netinet/tcp_fastopen.h47
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diff --git a/sys/netinet/tcp_fastopen.h b/sys/netinet/tcp_fastopen.h
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+/*-
+ * Copyright (c) 2015 Patrick Kelsey
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _TCP_FASTOPEN_H_
+#define _TCP_FASTOPEN_H_
+
+#ifdef _KERNEL
+
+#define TCP_FASTOPEN_COOKIE_LEN 8 /* tied to SipHash24 64-bit output */
+
+VNET_DECLARE(unsigned int, tcp_fastopen_enabled);
+#define V_tcp_fastopen_enabled VNET(tcp_fastopen_enabled)
+
+void tcp_fastopen_init(void);
+void tcp_fastopen_destroy(void);
+unsigned int *tcp_fastopen_alloc_counter(void);
+void tcp_fastopen_decrement_counter(unsigned int *counter);
+int tcp_fastopen_check_cookie(struct in_conninfo *inc, uint8_t *cookie,
+ unsigned int len, uint64_t *latest_cookie);
+#endif /* _KERNEL */
+
+#endif /* _TCP_FASTOPEN_H_ */
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