3 /* transport - low level communication */
5 /* Copyright (c) 2004 Martin Quinson. All rights reserved. */
7 /* This program is free software; you can redistribute it and/or modify it
8 * under the terms of the license (GNU LGPL) which comes with this package. */
12 #include "gras/Transport/transport_private.h"
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(transport,gras,"Conveying bytes over the network");
15 XBT_LOG_NEW_SUBCATEGORY(trp_meas,transport,"Conveying bytes over the network without formating for perf measurements");
16 static short int _gras_trp_started = 0;
18 static xbt_dict_t _gras_trp_plugins; /* All registered plugins */
19 static void gras_trp_plugin_free(void *p); /* free one of the plugins */
22 gras_trp_plugin_new(const char *name, gras_trp_setup_t setup) {
25 gras_trp_plugin_t plug = xbt_new0(s_gras_trp_plugin_t, 1);
27 DEBUG1("Create plugin %s",name);
29 plug->name=xbt_strdup(name);
34 if (e.category == mismatch_error) {
35 /* SG plugin raise mismatch when in RL mode (and vice versa) */
46 xbt_dict_set(_gras_trp_plugins, name, plug, gras_trp_plugin_free);
49 void gras_trp_init(void){
50 if (!_gras_trp_started) {
51 /* make room for all plugins */
52 _gras_trp_plugins=xbt_dict_new();
54 #ifdef HAVE_WINSOCK2_H
55 /* initialize the windows mechanism */
57 WORD wVersionRequested;
60 wVersionRequested = MAKEWORD( 2, 0 );
61 xbt_assert0(WSAStartup( wVersionRequested, &wsaData ) == 0,
62 "Cannot find a usable WinSock DLL");
64 /* Confirm that the WinSock DLL supports 2.0.*/
65 /* Note that if the DLL supports versions greater */
66 /* than 2.0 in addition to 2.0, it will still return */
67 /* 2.0 in wVersion since that is the version we */
70 xbt_assert0(LOBYTE( wsaData.wVersion ) == 2 &&
71 HIBYTE( wsaData.wVersion ) == 0,
72 "Cannot find a usable WinSock DLL");
73 INFO0("Found and initialized winsock2");
74 } /* The WinSock DLL is acceptable. Proceed. */
77 xbt_assert0(WSAStartup( 0x0101, &wsaData ) == 0,
78 "Cannot find a usable WinSock DLL");
79 INFO0("Found and initialized winsock");
84 gras_trp_plugin_new("tcp", gras_trp_tcp_setup);
85 gras_trp_plugin_new("file",gras_trp_file_setup);
86 gras_trp_plugin_new("sg",gras_trp_sg_setup);
88 /* buf is composed, so it must come after the others */
89 gras_trp_plugin_new("buf", gras_trp_buf_setup);
97 xbt_dynar_t sockets = gras_socketset_get();
98 gras_socket_t sock_iter;
101 if (_gras_trp_started == 0) {
105 if ( --_gras_trp_started == 0 ) {
106 #ifdef HAVE_WINSOCK_H
107 if ( WSACleanup() == SOCKET_ERROR ) {
108 if ( WSAGetLastError() == WSAEINPROGRESS ) {
109 WSACancelBlockingCall();
115 /* Close all the sockets */
116 xbt_dynar_foreach(sockets,cursor,sock_iter) {
117 VERB1("Closing the socket %p left open on exit. Maybe a socket leak?",
119 gras_socket_close(sock_iter);
122 /* Delete the plugins */
123 xbt_dict_free(&_gras_trp_plugins);
128 void gras_trp_plugin_free(void *p) {
129 gras_trp_plugin_t plug = p;
134 } else if (plug->data) {
135 DEBUG1("Plugin %s lacks exit(). Free data anyway.",plug->name);
146 * gras_trp_socket_new:
148 * Malloc a new socket, and initialize it with defaults
150 void gras_trp_socket_new(int incoming,
151 gras_socket_t *dst) {
153 gras_socket_t sock=xbt_new0(s_gras_socket_t,1);
155 DEBUG1("Create a new socket (%p)", (void*)sock);
159 sock->incoming = incoming ? 1:0;
160 sock->outgoing = incoming ? 0:1;
161 sock->accepting = incoming ? 1:0;
166 sock->peer_port = -1;
167 sock->peer_name = NULL;
170 sock->bufdata = NULL;
174 xbt_dynar_push(gras_socketset_get(),dst);
180 * gras_socket_server_ext:
182 * Opens a server socket and make it ready to be listened to.
183 * In real life, you'll get a TCP socket.
186 gras_socket_server_ext(unsigned short port,
188 unsigned long int bufSize,
192 gras_trp_plugin_t trp;
195 DEBUG2("Create a server socket from plugin %s on port %d",
196 gras_if_RL() ? "tcp" : "sg",
198 trp = gras_trp_plugin_get_by_name((measurement? (gras_if_RL() ? "tcp" : "sg")
201 /* defaults settings */
202 gras_trp_socket_new(1,&sock);
205 sock->bufSize = bufSize;
206 sock->meas = measurement;
208 /* Call plugin socket creation function */
209 DEBUG1("Prepare socket with plugin (fct=%p)",trp->socket_server);
211 trp->socket_server(trp, sock);
212 DEBUG3("in=%c out=%c accept=%c",
213 sock->incoming?'y':'n',
214 sock->outgoing?'y':'n',
215 sock->accepting?'y':'n');
225 * gras_socket_client_ext:
227 * Opens a client socket to a remote host.
228 * In real life, you'll get a TCP socket.
231 gras_socket_client_ext(const char *host,
234 unsigned long int bufSize,
238 gras_trp_plugin_t trp;
241 trp = gras_trp_plugin_get_by_name((measurement? (gras_if_RL() ? "tcp" : "sg")
244 DEBUG1("Create a client socket from plugin %s",gras_if_RL() ? "tcp" : "sg");
245 /* defaults settings */
246 gras_trp_socket_new(0,&sock);
248 sock->peer_port = port;
249 sock->peer_name = (char*)strdup(host?host:"localhost");
250 sock->bufSize = bufSize;
251 sock->meas = measurement;
253 /* plugin-specific */
255 (*trp->socket_client)(trp, sock);
256 DEBUG3("in=%c out=%c accept=%c",
257 sock->incoming?'y':'n',
258 sock->outgoing?'y':'n',
259 sock->accepting?'y':'n');
269 * gras_socket_server:
271 * Opens a server socket and make it ready to be listened to.
272 * In real life, you'll get a TCP socket.
275 gras_socket_server(unsigned short port) {
276 return gras_socket_server_ext(port,32,0);
280 * gras_socket_client:
282 * Opens a client socket to a remote host.
283 * In real life, you'll get a TCP socket.
286 gras_socket_client(const char *host,
287 unsigned short port) {
288 return gras_socket_client_ext(host,port,32,0);
292 void gras_socket_close(gras_socket_t sock) {
293 xbt_dynar_t sockets = gras_socketset_get();
294 gras_socket_t sock_iter;
298 /* FIXME: Issue an event when the socket is closed */
300 xbt_dynar_foreach(sockets,cursor,sock_iter) {
301 if (sock == sock_iter) {
302 xbt_dynar_cursor_rm(sockets,&cursor);
303 if (sock->plugin->socket_close)
304 (* sock->plugin->socket_close)(sock);
306 /* free the memory */
308 free(sock->peer_name);
314 WARN1("Ignoring request to free an unknown socket (%p)",sock);
320 * gras_trp_chunk_send:
322 * Send a bunch of bytes from on socket
325 gras_trp_chunk_send(gras_socket_t sd,
328 xbt_assert1(sd->outgoing,
329 "Socket not suited for data send (outgoing=%c)",
330 sd->outgoing?'y':'n');
331 xbt_assert1(sd->plugin->chunk_send,
332 "No function chunk_send on transport plugin %s",
334 (*sd->plugin->chunk_send)(sd,data,size);
337 * gras_trp_chunk_recv:
339 * Receive a bunch of bytes from a socket
342 gras_trp_chunk_recv(gras_socket_t sd,
345 xbt_assert0(sd->incoming,
346 "Socket not suited for data receive");
347 xbt_assert1(sd->plugin->chunk_recv,
348 "No function chunk_recv on transport plugin %s",
350 (sd->plugin->chunk_recv)(sd,data,size);
356 * Make sure all pending communications are done
359 gras_trp_flush(gras_socket_t sd) {
360 (sd->plugin->flush)(sd);
364 gras_trp_plugin_get_by_name(const char *name){
365 return xbt_dict_get(_gras_trp_plugins,name);
368 int gras_socket_my_port (gras_socket_t sock) {
371 int gras_socket_peer_port(gras_socket_t sock) {
372 return sock->peer_port;
374 char *gras_socket_peer_name(gras_socket_t sock) {
375 return sock->peer_name;
378 /** \brief Check if the provided socket is a measurement one (or a regular one) */
379 int gras_socket_is_meas(gras_socket_t sock) {
383 /** \brief Send a chunk of (random) data over a measurement socket
385 * @param peer measurement socket to use for the experiment
386 * @param timeout timeout (in seconds)
387 * @param exp_size total amount of data to send (in bytes).
388 * @param msg_size size of each chunk sent over the socket (in bytes).
390 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
391 * each side of the socket should be paired.
393 * The exchanged data is zeroed to make sure it's initialized, but
394 * there is no way to control what is sent (ie, you cannot use these
395 * functions to exchange data out of band).
397 void gras_socket_meas_send(gras_socket_t peer,
398 unsigned int timeout,
399 unsigned long int exp_size,
400 unsigned long int msg_size) {
401 char *chunk = xbt_malloc0(msg_size);
402 unsigned long int exp_sofar;
406 xbt_assert0(peer->meas,"Asked to send measurement data on a regular socket");
408 for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += msg_size) {
409 CDEBUG5(trp_meas,"Sent %lu of %lu (msg_size=%ld) to %s:%d",
410 exp_sofar,exp_size,msg_size,
411 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
412 gras_trp_chunk_send(peer,chunk,msg_size);
414 CDEBUG5(trp_meas,"Sent %lu of %lu (msg_size=%ld) to %s:%d",
415 exp_sofar,exp_size,msg_size,
416 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
423 /** \brief Receive a chunk of data over a measurement socket
425 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
426 * each side of the socket should be paired.
428 void gras_socket_meas_recv(gras_socket_t peer,
429 unsigned int timeout,
430 unsigned long int exp_size,
431 unsigned long int msg_size){
433 char *chunk = xbt_malloc(msg_size);
434 unsigned long int exp_sofar;
438 xbt_assert0(peer->meas,"Asked to receive measurement data on a regular socket\n");
440 for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += msg_size) {
441 CDEBUG5(trp_meas,"Recvd %ld of %lu (msg_size=%ld) from %s:%d",
442 exp_sofar,exp_size,msg_size,
443 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
444 gras_trp_chunk_recv(peer,chunk,msg_size);
446 CDEBUG5(trp_meas,"Recvd %ld of %lu (msg_size=%ld) from %s:%d",
447 exp_sofar,exp_size,msg_size,
448 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
455 * \brief Something similar to the good old accept system call.
457 * Make sure that there is someone speaking to the provided server socket.
458 * In RL, it does an accept(2) and return the result as last argument.
459 * In SG, as accepts are useless, it returns the provided argument as result.
460 * You should thus test whether (peer != accepted) before closing both of them.
462 * You should only call this on measurement sockets. It is automatically
463 * done for regular sockets, but you usually want more control about
464 * what's going on with measurement sockets.
466 gras_socket_t gras_socket_meas_accept(gras_socket_t peer){
469 xbt_assert0(peer->meas,
470 "No need to accept on non-measurement sockets (it's automatic)");
472 if (!peer->accepting) {
473 /* nothing to accept here */
477 res = (peer->plugin->socket_accept)(peer);
478 res->meas = peer->meas;
479 CDEBUG1(trp_meas,"meas_accepted onto %d",res->sd);
486 * Creating procdata for this module
488 static void *gras_trp_procdata_new() {
489 gras_trp_procdata_t res = xbt_new(s_gras_trp_procdata_t,1);
491 res->sockets = xbt_dynar_new(sizeof(gras_socket_t*), NULL);
497 * Freeing procdata for this module
499 static void gras_trp_procdata_free(void *data) {
500 gras_trp_procdata_t res = (gras_trp_procdata_t)data;
502 xbt_dynar_free(&( res->sockets ));
507 * Module registration
509 void gras_trp_register() {
510 gras_procdata_add("gras_trp",gras_trp_procdata_new, gras_trp_procdata_free);
515 gras_socketset_get(void) {
517 return ((gras_trp_procdata_t) gras_libdata_get("gras_trp"))->sockets;