Socket API echo server

Change-Id: I67ee8bbcad12e272193ac9e5bc6e39c43ce453ed
Signed-off-by: Dave Barach <dave@barachs.net>

1 files changed, 181 insertions, 0 deletions

diff --git a/src/uri/uri_socket_server.c b/src/uri/uri_socket_server.c
new file mode 100644
index 00000000..64d3b492
--- /dev/null
+++ b/src/uri/uri_socket_server.c
@@ -0,0 +1,181 @@
+/*
+ * 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>
+#include <signal.h>
+#include <sys/ucontext.h>
+
+volatile int signal_received;
+
+static void
+unix_signal_handler (int signum, siginfo_t * si, ucontext_t * uc)
+{
+  signal_received = 1;
+}
+
+static void
+setup_signal_handler (void)
+{
+  uword i;
+  struct sigaction sa;
+
+  for (i = 1; i < 32; i++)
+    {
+      memset (&sa, 0, sizeof (sa));
+      sa.sa_sigaction = (void *) unix_signal_handler;
+      sa.sa_flags = SA_SIGINFO;
+
+      switch (i)
+	{
+	  /* these signals take the default action */
+	case SIGABRT:
+	case SIGKILL:
+	case SIGSTOP:
+	case SIGUSR1:
+	case SIGUSR2:
+	  continue;
+
+	  /* ignore SIGPIPE, SIGCHLD */
+	case SIGPIPE:
+	case SIGCHLD:
+	  sa.sa_sigaction = (void *) SIG_IGN;
+	  break;
+
+	  /* catch and handle all other signals */
+	default:
+	  break;
+	}
+
+      if (sigaction (i, &sa, 0) < 0)
+	clib_unix_warning ("sigaction %U", format_signal, i);
+    }
+}
+
+
+int
+main (int argc, char *argv[])
+{
+  int sockfd, portno, n, sent, accfd;
+  struct sockaddr_in serv_addr;
+  struct hostent *server;
+  u8 *rx_buffer = 0;
+
+  if (0 && argc < 3)
+    {
+      fformat (stderr, "usage %s hostname port\n", argv[0]);
+      exit (0);
+    }
+
+  setup_signal_handler ();
+
+  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");
+  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 (bind (sockfd, (const void *) &serv_addr, sizeof (serv_addr)) < 0)
+    {
+      clib_unix_warning ("bind");
+      exit (1);
+    }
+
+  vec_validate (rx_buffer, 8999 /* jumbo mtu */ );
+
+  if (listen (sockfd, 5 /* backlog */ ) < 0)
+    {
+      clib_unix_warning ("listen");
+      close (sockfd);
+      return 1;
+    }
+
+  while (1)
+    {
+      if (signal_received)
+	break;
+
+      accfd = accept (sockfd, 0 /* don't care */ , 0);
+      if (accfd < 0)
+	{
+	  clib_unix_warning ("accept");
+	  continue;
+	}
+      while (1)
+	{
+	  n = recv (accfd, rx_buffer, vec_len (rx_buffer), 0 /* flags */ );
+	  if (n == 0)
+	    {
+	      /* Graceful exit */
+	      close (accfd);
+	      break;
+	    }
+	  if (n < 0)
+	    {
+	      clib_unix_warning ("recv");
+	      close (accfd);
+	      break;
+	    }
+
+	  if (signal_received)
+	    break;
+
+	  sent = send (accfd, rx_buffer, n, 0 /* flags */ );
+	  if (n < 0)
+	    {
+	      clib_unix_warning ("send");
+	      close (accfd);
+	      break;
+	    }
+
+	  if (sent != n)
+	    {
+	      clib_warning ("sent %d not %d", sent, n);
+	    }
+
+	  if (signal_received)
+	    break;
+	}
+    }
+
+  close (sockfd);
+
+  return 0;
+}
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */