TCP/session improvements

- Added svm fifo flag for tracking fifo dequeue events (replaces event
  length). Updated all code to switch to the new scheme.
- More session debugging
- Fix peek index wrap
- Add a trivial socket test client
- Fast retransmit/cc fixes
- tx and rx SACK fixes and unit testing
- SRTT computation fix
- remove dupack/ack burst filters
- improve ack rx
- improved segment rx
- builtin client test code

Change-Id: Ic4eb2d5ca446eb2260ccd3ccbcdaa73c64e7f4e1
Signed-off-by: Florin Coras <fcoras@cisco.com>
Signed-off-by: Dave Barach <dbarach@cisco.com>

1 files changed, 126 insertions, 0 deletions

diff --git a/src/uri/uri_socket_test.c b/src/uri/uri_socket_test.c
new file mode 100644
index 00000000000..9f049bda597
--- /dev/null
+++ b/src/uri/uri_socket_test.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2017 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.
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <vppinfra/format.h>
+
+int
+main (int argc, char *argv[])
+{
+  int sockfd, portno, n;
+  struct sockaddr_in serv_addr;
+  struct hostent *server;
+  u8 *rx_buffer = 0, *tx_buffer = 0;
+  u32 offset;
+  int iter, i;
+  if (0 && argc < 3)
+    {
+      fformat (stderr, "usage %s hostname port\n", argv[0]);
+      exit (0);
+    }
+
+  portno = 1234;		// atoi(argv[2]);
+  sockfd = socket (AF_INET, SOCK_STREAM, 0);
+  if (sockfd < 0)
+    {
+      clib_unix_error ("socket");
+      exit (1);
+    }
+  server = gethostbyname ("6.0.1.1" /* argv[1] */ );
+  if (server == NULL)
+    {
+      clib_unix_warning ("gethostbyname");
+      exit (1);
+    }
+  bzero ((char *) &serv_addr, sizeof (serv_addr));
+  serv_addr.sin_family = AF_INET;
+  bcopy ((char *) server->h_addr,
+	 (char *) &serv_addr.sin_addr.s_addr, server->h_length);
+  serv_addr.sin_port = htons (portno);
+  if (connect (sockfd, (const void *) &serv_addr, sizeof (serv_addr)) < 0)
+    {
+      clib_unix_warning ("connect");
+      exit (1);
+    }
+
+  vec_validate (rx_buffer, 1400);
+  vec_validate (tx_buffer, 1400);
+
+  for (i = 0; i < vec_len (tx_buffer); i++)
+    tx_buffer[i] = (i + 1) % 0xff;
+
+  /*
+   * Send one packet to warm up the RX pipeline
+   */
+  n = send (sockfd, tx_buffer, vec_len (tx_buffer), 0 /* flags */ );
+  if (n != vec_len (tx_buffer))
+    {
+      clib_unix_warning ("write");
+      exit (0);
+    }
+
+  for (iter = 0; iter < 100000; iter++)
+    {
+      if (iter < 99999)
+	{
+	  n = send (sockfd, tx_buffer, vec_len (tx_buffer), 0 /* flags */ );
+	  if (n != vec_len (tx_buffer))
+	    {
+	      clib_unix_warning ("write");
+	      exit (0);
+	    }
+	}
+      offset = 0;
+
+      do
+	{
+	  n = recv (sockfd, rx_buffer + offset,
+		    vec_len (rx_buffer) - offset, 0 /* flags */ );
+	  if (n < 0)
+	    {
+	      clib_unix_warning ("read");
+	      exit (0);
+	    }
+	  offset += n;
+	}
+      while (offset < vec_len (rx_buffer));
+
+      for (i = 0; i < vec_len (rx_buffer); i++)
+	{
+	  if (rx_buffer[i] != tx_buffer[i])
+	    {
+	      clib_warning ("[%d] read 0x%x not 0x%x",
+			    rx_buffer[i], tx_buffer[i]);
+	      exit (1);
+	    }
+	}
+
+    }
+  close (sockfd);
+  return 0;
+}
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */