1 files changed, 138 insertions, 0 deletions
diff --git a/src/vnet/ip/tcp_packet.h b/src/vnet/ip/tcp_packet.h
new file mode 100644
index 00000000..ed402403
--- /dev/null
+++ b/src/vnet/ip/tcp_packet.h
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * ip4/tcp_packet.h: TCP packet format (see RFC 793)
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software 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.
+ */
+
+#ifndef included_tcp_packet_h
+#define included_tcp_packet_h
+
+/* TCP flags bit 0 first. */
+#define foreach_tcp_flag			\
+  _ (FIN)					\
+  _ (SYN)					\
+  _ (RST)					\
+  _ (PSH)					\
+  _ (ACK)					\
+  _ (URG)					\
+  _ (ECE)					\
+  _ (CWR)
+
+enum
+{
+#define _(f) TCP_FLAG_BIT_##f,
+  foreach_tcp_flag
+#undef _
+    TCP_N_FLAG_BITS,
+
+#define _(f) TCP_FLAG_##f = 1 << TCP_FLAG_BIT_##f,
+  foreach_tcp_flag
+#undef _
+};
+
+typedef struct
+{
+  /* Source and destination port. */
+  union
+  {
+    union
+    {
+      struct
+      {
+	u16 src, dst;
+      };
+      u32 src_and_dst;
+    } ports;
+    u16 src_port, dst_port;
+  };
+
+  /* Sequence and acknowledgment number. */
+  u32 seq_number, ack_number;
+
+  /* Size of TCP header in 32-bit units plus 4 reserved bits. */
+  u8 tcp_header_u32s_and_reserved;
+
+  /* see foreach_tcp_flag for enumation of tcp flags. */
+  u8 flags;
+
+  /* Current window advertised by sender.
+     This is the number of bytes sender is willing to receive
+     right now. */
+  u16 window;
+
+  /* Checksum of TCP pseudo header and data. */
+  u16 checksum;
+
+  u16 urgent_pointer;
+} tcp_header_t;
+
+always_inline int
+tcp_header_bytes (tcp_header_t * t)
+{
+  return (t->tcp_header_u32s_and_reserved >> 4) * sizeof (u32);
+}
+
+/* TCP options. */
+typedef enum tcp_option_type
+{
+  TCP_OPTION_END = 0,
+  TCP_OPTION_NOP = 1,
+  TCP_OPTION_MSS = 2,
+  TCP_OPTION_WINDOW_SCALE = 3,
+  TCP_OPTION_SACK_PERMITTED = 4,
+  TCP_OPTION_SACK_BLOCK = 5,
+  TCP_OPTION_TIME_STAMP = 8,
+} tcp_option_type_t;
+
+/* All except NOP and END have 1 byte length field. */
+typedef struct
+{
+  tcp_option_type_t type:8;
+
+  /* Length of this option in bytes. */
+  u8 length;
+} tcp_option_with_length_t;
+
+#endif /* included_tcp_packet_h */
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */