Split into several files to explain how it can be done

[simgrid.git] / examples / gras / ping / ping_client.c

diff --git a/examples/gras/ping/ping_client.c b/examples/gras/ping/ping_client.c
new file mode 100644 (file)
index 0000000..2afae4b
--- /dev/null
+++ b/examples/gras/ping/ping_client.c
@@ -0,0 +1,85 @@
+/* $Id$ */
+
+/* ping - ping/pong demo of GRAS features                                   */
+
+/* Copyright (c) 2003, 2004, 2005 Martin Quinson. All rights reserved.      */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include "ping.h"
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(Ping);
+
+int client(int argc,char *argv[]) {
+  xbt_ex_t e; 
+  gras_socket_t toserver=NULL; /* peer */
+
+  gras_socket_t from;
+  int ping, pong;
+
+  const char *host = "127.0.0.1";
+        int   port = 4000;
+
+  /* 1. Init the GRAS's infrastructure */
+  gras_init(&argc, argv);
+   
+  /* 2. Get the server's address. The command line override defaults when specified */
+  if (argc == 3) {
+    host=argv[1];
+    port=atoi(argv[2]);
+  } 
+
+  INFO2("Launch client (server on %s:%d)",host,port);
+   
+  /* 3. Wait for the server startup */
+  gras_os_sleep(1);
+   
+  /* 4. Create a socket to speak to the server */
+  TRY {
+    toserver=gras_socket_client(host,port);
+  } CATCH(e) {
+    RETHROW0("Unable to connect to the server: %s");
+  }
+  INFO2("Connected to %s:%d.",host,port);    
+
+
+  /* 5. Register the messages. 
+        See, it doesn't have to be done completely at the beginning, only before use */
+  ping_register_messages();
+
+  /* 6. Keep the user informed of what's going on */
+  INFO2(">>>>>>>> Connected to server which is on %s:%d <<<<<<<<", 
+       gras_socket_peer_name(toserver),gras_socket_peer_port(toserver));
+
+  /* 7. Prepare and send the ping message to the server */
+  ping = 1234;
+  TRY {
+    gras_msg_send(toserver, gras_msgtype_by_name("ping"), &ping);
+  } CATCH(e) {
+    gras_socket_close(toserver);
+    RETHROW0("Failed to send PING to server: %s");
+  }
+  INFO3(">>>>>>>> Message PING(%d) sent to %s:%d <<<<<<<<",
+       ping,
+       gras_socket_peer_name(toserver),gras_socket_peer_port(toserver));
+
+  /* 8. Wait for the answer from the server, and deal with issues */
+  TRY {
+    gras_msg_wait(6000,gras_msgtype_by_name("pong"),
+                 &from,&pong);
+  } CATCH(e) {
+    gras_socket_close(toserver);
+    RETHROW0("Why can't I get my PONG message like everyone else: %s");
+  }
+
+  /* 9. Keep the user informed of what's going on, again */
+  INFO3(">>>>>>>> Got PONG(%d) from %s:%d <<<<<<<<", 
+       pong,
+       gras_socket_peer_name(from),gras_socket_peer_port(from));
+
+  /* 10. Free the allocated resources, and shut GRAS down */
+  gras_socket_close(toserver);
+  gras_exit();
+  INFO0("Done.");
+  return 0;
+} /* end_of_client */