--- /dev/null
+/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
+ * Junior University
+ *
+ * We are making the OpenFlow specification and associated documentation
+ * (Software) available for public use and benefit with the expectation
+ * that others will use, modify and enhance the Software and contribute
+ * those enhancements back to the community. However, since we would
+ * like to make the Software available for broadest use, with as few
+ * restrictions as possible permission is hereby granted, free of
+ * charge, to any person obtaining a copy of this Software to deal in
+ * the Software under the copyrights without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * The name and trademarks of copyright holder(s) may NOT be used in
+ * advertising or publicity pertaining to the Software or any
+ * derivatives without specific, written prior permission.
+ */
+
+#ifndef NETFLOW_H
+#define NETFLOW_H 1
+
+#include <util.h>
+
+
+#define NETFLOW_V5_VERSION 5
+
+/* Every NetFlow v5 message contains the header that follows. This is
+ * followed by up to thirty records that describe a terminating flow.
+ * We only send a single record per NetFlow message.
+ */
+struct netflow_v5_header {
+ uint16_t version; /* NetFlow version is 5. */
+ uint16_t count; /* Number of records in this message. */
+ uint32_t sysuptime; /* System uptime in milliseconds. */
+ uint32_t unix_secs; /* Number of seconds since Unix epoch. */
+ uint32_t unix_nsecs; /* Number of residual nanoseconds
+ after epoch seconds. */
+ uint32_t flow_seq; /* Number of flows since sending
+ messages began. */
+ uint8_t engine_type; /* Set to zero. */
+ uint8_t engine_id; /* Set to zero. */
+ uint16_t sampling_interval; /* Set to zero. */
+};
+BUILD_ASSERT_DECL(sizeof(struct netflow_v5_header) == 24);
+
+/* A NetFlow v5 description of a terminating flow. It is preceded by a
+ * NetFlow v5 header.
+ */
+struct netflow_v5_record {
+ uint32_t src_addr; /* Source IP address. */
+ uint32_t dst_addr; /* Destination IP address. */
+ uint32_t nexthop; /* IP address of next hop. Set to 0. */
+ uint16_t input; /* Input interface index. */
+ uint16_t output; /* Output interface index. */
+ uint32_t packet_count; /* Number of packets. */
+ uint32_t byte_count; /* Number of bytes. */
+ uint32_t init_time; /* Value of sysuptime on first packet. */
+ uint32_t used_time; /* Value of sysuptime on last packet. */
+
+ /* The 'src_port' and 'dst_port' identify the source and destination
+ * port, respectively, for TCP and UDP. For ICMP, the high-order
+ * byte identifies the type and low-order byte identifies the code
+ * in the 'dst_port' field. */
+ uint16_t src_port;
+ uint16_t dst_port;
+
+ uint8_t pad1;
+ uint8_t tcp_flags; /* Union of seen TCP flags. */
+ uint8_t ip_proto; /* IP protocol. */
+ uint8_t ip_tos; /* IP TOS value. */
+ uint16_t src_as; /* Source AS ID. Set to 0. */
+ uint16_t dst_as; /* Destination AS ID. Set to 0. */
+ uint8_t src_mask; /* Source mask bits. Set to 0. */
+ uint8_t dst_mask; /* Destination mask bits. Set to 0. */
+ uint8_t pad[2];
+};
+BUILD_ASSERT_DECL(sizeof(struct netflow_v5_record) == 48);
+
+#endif /* netflow.h */
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