+++ /dev/null
-/* $Id$ */
-
-/* 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 "gras.h"
-
-XBT_LOG_NEW_DEFAULT_CATEGORY(Ping,"Messages specific to this example");
-
-/* register messages which may be sent (common to client and server) */
-static void register_messages(void) {
- gras_msgtype_declare("ping", gras_datadesc_by_name("int"));
- gras_msgtype_declare("pong", gras_datadesc_by_name("int"));
-}
-
-/* Function prototypes */
-int server (int argc,char *argv[]);
-int client (int argc,char *argv[]);
-
-/* **********************************************************************
- * Server code
- * **********************************************************************/
-
-/* Global private data */
-typedef struct {
- gras_socket_t sock;
- int endcondition;
-} server_data_t;
-
-
-static int server_cb_ping_handler(gras_msg_cb_ctx_t ctx, void *payload) {
-
- xbt_ex_t e;
- /* 1. Get the payload into the msg variable, and retrieve my caller */
- int msg=*(int*)payload;
- gras_socket_t expeditor = gras_msg_cb_ctx_from(ctx);
-
- /* 2. Retrieve the server's state (globals) */
-
- server_data_t *globals=(server_data_t*)gras_userdata_get();
- globals->endcondition = 0;
-
- /* 3. Log which client connected */
- INFO3(">>>>>>>> Got message PING(%d) from %s:%d <<<<<<<<",
- msg,
- gras_socket_peer_name(expeditor), gras_socket_peer_port(expeditor));
-
- /* 4. Change the value of the msg variable */
- msg = 4321;
- /* 5. Send it back as payload of a pong message to the expeditor */
- TRY {
- gras_msg_send(expeditor, gras_msgtype_by_name("pong"), &msg);
-
- /* 6. Deal with errors: add some details to the exception */
- } CATCH(e) {
- gras_socket_close(globals->sock);
- RETHROW0("Unable answer with PONG: %s");
- }
-
- INFO0(">>>>>>>> Answered with PONG(4321) <<<<<<<<");
-
- /* 7. Set the endcondition boolean to true (and make sure the server stops after receiving it). */
- globals->endcondition = 1;
-
- /* 8. Make sure we don't leak sockets */
- gras_socket_close(expeditor);
-
- /* 9. Tell GRAS that we consummed this message */
- return 1;
-} /* end_of_server_cb_ping_handler */
-
-int server (int argc,char *argv[]) {
- server_data_t *globals;
-
- int port = 4000;
-
- /* 1. Init the GRAS infrastructure and declare my globals */
- gras_init(&argc,argv);
- globals=gras_userdata_new(server_data_t);
-
- /* 2. Get the port I should listen on from the command line, if specified */
- if (argc == 2) {
- port=atoi(argv[1]);
- }
-
- INFO1("Launch server (port=%d)", port);
-
- /* 3. Create my master socket */
- globals->sock = gras_socket_server(port);
-
- /* 4. Register the known messages. This function is called twice here, but it's because
- this file also acts as regression test, no need to do so yourself of course. */
- register_messages();
- register_messages(); /* just to make sure it works ;) */
-
- /* 5. Register my callback */
- gras_cb_register(gras_msgtype_by_name("ping"),&server_cb_ping_handler);
-
- INFO1(">>>>>>>> Listening on port %d <<<<<<<<", gras_socket_my_port(globals->sock));
- globals->endcondition=0;
-
- /* 6. Wait up to 10 minutes for an incomming message to handle */
- gras_msg_handle(600.0);
-
- /* 7. Housekeeping */
- if (!globals->endcondition)
- WARN0("An error occured, the endcondition was not set by the callback");
-
- /* 8. Free the allocated resources, and shut GRAS down */
- gras_socket_close(globals->sock);
- free(globals);
- gras_exit();
-
- INFO0("Done.");
- return 0;
-} /* end_of_server */
-
-/* **********************************************************************
- * Client code
- * **********************************************************************/
-
-/* Function prototypes */
-
-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 */
- 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 */
