From aad06c990684e98b896522d2dfa2937f83dcefbe Mon Sep 17 00:00:00 2001 From: cherierm Date: Wed, 11 Apr 2007 19:19:41 +0000 Subject: [PATCH] used during the build process git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@3396 48e7efb5-ca39-0410-a469-dd3cf9ba447f --- examples/gras/ping/ping.c | 179 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 179 insertions(+) create mode 100644 examples/gras/ping/ping.c diff --git a/examples/gras/ping/ping.c b/examples/gras/ping/ping.c new file mode 100644 index 0000000000..5095e3013d --- /dev/null +++ b/examples/gras/ping/ping.c @@ -0,0 +1,179 @@ +#include "ping.h" + + +XBT_LOG_NEW_DEFAULT_CATEGORY(Ping,"Messages specific to this example"); + +/* Global private data */ +typedef struct { + gras_socket_t sock; + int endcondition; +} server_data_t; + + +/* register messages which may be sent (common to client and server) */ +void ping_register_messages(void) { + gras_msgtype_declare("ping", gras_datadesc_by_name("int")); + gras_msgtype_declare("pong", gras_datadesc_by_name("int")); + INFO0("Messages registered"); +} + +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, "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 0; +} /* 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. */ + ping_register_messages(); + ping_register_messages(); /* just to make sure it works ;) */ + + /* 5. Register my callback */ + gras_cb_register("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(60.0); + + /* 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 */ + + +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, "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,"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 */ -- 2.20.1