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. */
13 int gras_opt_trp_nomoredata_on_close=0;
18 #include "gras/Transport/transport_private.h"
20 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_trp,gras,"Conveying bytes over the network");
21 XBT_LOG_NEW_SUBCATEGORY(gras_trp_meas,gras_trp,"Conveying bytes over the network without formating for perf measurements");
22 static short int _gras_trp_started = 0;
24 static xbt_dict_t _gras_trp_plugins; /* All registered plugins */
25 static void gras_trp_plugin_free(void *p); /* free one of the plugins */
28 gras_trp_plugin_new(const char *name, gras_trp_setup_t setup) {
31 gras_trp_plugin_t plug = xbt_new0(s_gras_trp_plugin_t, 1);
33 DEBUG1("Create plugin %s",name);
35 plug->name=xbt_strdup(name);
40 if (e.category == mismatch_error) {
41 /* SG plugin raise mismatch when in RL mode (and vice versa) */
52 xbt_dict_set(_gras_trp_plugins, name, plug, gras_trp_plugin_free);
55 void gras_trp_init(void){
56 if (!_gras_trp_started) {
57 /* make room for all plugins */
58 _gras_trp_plugins=xbt_dict_new();
60 #ifdef HAVE_WINSOCK2_H
61 /* initialize the windows mechanism */
63 WORD wVersionRequested;
66 wVersionRequested = MAKEWORD( 2, 0 );
67 xbt_assert0(WSAStartup( wVersionRequested, &wsaData ) == 0,
68 "Cannot find a usable WinSock DLL");
70 /* Confirm that the WinSock DLL supports 2.0.*/
71 /* Note that if the DLL supports versions greater */
72 /* than 2.0 in addition to 2.0, it will still return */
73 /* 2.0 in wVersion since that is the version we */
76 xbt_assert0(LOBYTE( wsaData.wVersion ) == 2 &&
77 HIBYTE( wsaData.wVersion ) == 0,
78 "Cannot find a usable WinSock DLL");
79 INFO0("Found and initialized winsock2");
80 } /* The WinSock DLL is acceptable. Proceed. */
83 xbt_assert0(WSAStartup( 0x0101, &wsaData ) == 0,
84 "Cannot find a usable WinSock DLL");
85 INFO0("Found and initialized winsock");
90 gras_trp_plugin_new("file",gras_trp_file_setup);
91 gras_trp_plugin_new("sg",gras_trp_sg_setup);
92 gras_trp_plugin_new("tcp", gras_trp_tcp_setup);
100 DEBUG1("gras_trp value %d",_gras_trp_started);
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 /* Delete the plugins */
116 xbt_dict_free(&_gras_trp_plugins);
121 void gras_trp_plugin_free(void *p) {
122 gras_trp_plugin_t plug = p;
127 } else if (plug->data) {
128 DEBUG1("Plugin %s lacks exit(). Free data anyway.",plug->name);
139 * gras_trp_socket_new:
141 * Malloc a new socket, and initialize it with defaults
143 void gras_trp_socket_new(int incoming,
144 gras_socket_t *dst) {
146 gras_socket_t sock=xbt_new0(s_gras_socket_t,1);
148 VERB1("Create a new socket (%p)", (void*)sock);
152 sock->incoming = incoming ? 1:0;
153 sock->outgoing = incoming ? 0:1;
154 sock->accepting = incoming ? 1:0;
162 sock->peer_port = -1;
163 sock->peer_name = NULL;
164 sock->peer_proc = NULL;
167 sock->bufdata = NULL;
175 * @brief Opens a server socket and makes it ready to be listened to.
176 * @param port: port on which you want to listen
177 * @param buf_size: size of the buffer (in byte) on the socket (for TCP sockets only). If 0, a sain default is used (32k, but may change)
178 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
180 * In real life, you'll get a TCP socket.
183 gras_socket_server_ext(unsigned short port,
185 unsigned long int buf_size,
189 gras_trp_plugin_t trp;
192 DEBUG2("Create a server socket from plugin %s on port %d",
193 gras_if_RL() ? "tcp" : "sg",
195 trp = gras_trp_plugin_get_by_name(gras_if_SG() ? "sg":"tcp");
197 /* defaults settings */
198 gras_trp_socket_new(1,&sock);
201 sock->buf_size = buf_size>0 ? buf_size : 32*1024;
202 sock->meas = measurement;
204 /* Call plugin socket creation function */
205 DEBUG1("Prepare socket with plugin (fct=%p)",trp->socket_server);
207 trp->socket_server(trp, sock);
208 DEBUG3("in=%c out=%c accept=%c",
209 sock->incoming?'y':'n',
210 sock->outgoing?'y':'n',
211 sock->accepting?'y':'n');
219 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport = port;
220 xbt_dynar_push(((gras_trp_procdata_t)
221 gras_libdata_by_id(gras_trp_libdata_id))->sockets,&sock);
225 * @brief Opens a server socket on any port in the given range
227 * @param minport: first port we will try
228 * @param maxport: last port we will try
229 * @param buf_size: size of the buffer (in byte) on the socket (for TCP sockets only). If 0, a sain default is used (32k, but may change)
230 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
232 * If none of the provided ports works, raises the exception got when trying the last possibility
235 gras_socket_server_range(unsigned short minport, unsigned short maxport,
236 unsigned long int buf_size, int measurement) {
239 gras_socket_t res=NULL;
242 for (port=minport; port<maxport;port ++) {
244 res=gras_socket_server_ext(port,buf_size,measurement);
257 * @brief Opens a client socket to a remote host.
258 * @param host: who you want to connect to
259 * @param port: where you want to connect to on this host
260 * @param buf_size: size of the buffer (in bytes) on the socket (for TCP sockets only). If 0, a sain default is used (32k, but may change)
261 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
263 * In real life, you'll get a TCP socket.
266 gras_socket_client_ext(const char *host,
269 unsigned long int buf_size,
273 gras_trp_plugin_t trp;
276 trp = gras_trp_plugin_get_by_name(gras_if_SG() ? "sg":"tcp");
278 DEBUG1("Create a client socket from plugin %s",gras_if_RL() ? "tcp" : "sg");
279 /* defaults settings */
280 gras_trp_socket_new(0,&sock);
282 sock->peer_port = port;
283 sock->peer_name = (char*)strdup(host?host:"localhost");
284 sock->buf_size = buf_size>0 ? buf_size: 32*1024;
285 sock->meas = measurement;
287 /* plugin-specific */
289 (*trp->socket_client)(trp, sock);
290 DEBUG3("in=%c out=%c accept=%c",
291 sock->incoming?'y':'n',
292 sock->outgoing?'y':'n',
293 sock->accepting?'y':'n');
298 xbt_dynar_push(((gras_trp_procdata_t)
299 gras_libdata_by_id(gras_trp_libdata_id))->sockets,&sock);
304 * @brief Opens a server socket and make it ready to be listened to.
306 * In real life, you'll get a TCP socket.
309 gras_socket_server(unsigned short port) {
310 return gras_socket_server_ext(port,32*1024,0);
313 /** @brief Opens a client socket to a remote host */
315 gras_socket_client(const char *host,
316 unsigned short port) {
317 return gras_socket_client_ext(host,port,0,0);
320 /** @brief Opens a client socket to a remote host specified as '\a host:\a port' */
322 gras_socket_client_from_string(const char *host) {
323 xbt_peer_t p = xbt_peer_from_string(host);
324 gras_socket_t res = gras_socket_client_ext(p->name,p->port,0,0);
329 /** \brief Close socket */
330 void gras_socket_close(gras_socket_t sock) {
331 xbt_dynar_t sockets = ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
332 gras_socket_t sock_iter = NULL;
336 VERB1("Close %p",sock);
337 if (sock == _gras_lastly_selected_socket) {
338 xbt_assert0(!gras_opt_trp_nomoredata_on_close || !sock->moredata,
339 "Closing a socket having more data in buffer while the nomoredata_on_close option is activated");
342 CRITICAL0("Closing a socket having more data in buffer. Option nomoredata_on_close disabled, so continuing.");
343 _gras_lastly_selected_socket=NULL;
346 /* FIXME: Issue an event when the socket is closed */
347 DEBUG1("sockets pointer before %p",sockets);
349 /* FIXME: Cannot get the dynar mutex, because it can be already locked */
350 // _xbt_dynar_foreach(sockets,cursor,sock_iter) {
351 for (cursor=0; cursor< xbt_dynar_length(sockets); cursor++) {
352 _xbt_dynar_cursor_get(sockets,&cursor,&sock_iter);
353 if (sock == sock_iter) {
354 DEBUG2("remove sock cursor %d dize %lu\n",cursor,xbt_dynar_length(sockets));
355 xbt_dynar_cursor_rm(sockets,&cursor);
356 if (sock->plugin->socket_close)
357 (* sock->plugin->socket_close)(sock);
359 /* free the memory */
361 free(sock->peer_name);
367 WARN1("Ignoring request to free an unknown socket (%p). Execution stack:",sock);
368 xbt_backtrace_display_current();
376 * Send a bunch of bytes from on socket
377 * (stable if we know the storage will keep as is until the next trp_flush)
380 gras_trp_send(gras_socket_t sd, char *data, long int size, int stable) {
381 xbt_assert0(sd->outgoing,"Socket not suited for data send");
382 (*sd->plugin->send)(sd,data,size,stable);
385 * gras_trp_chunk_recv:
387 * Receive a bunch of bytes from a socket
390 gras_trp_recv(gras_socket_t sd, char *data, long int size) {
391 xbt_assert0(sd->incoming,"Socket not suited for data receive");
392 (sd->plugin->recv)(sd,data,size);
398 * Make sure all pending communications are done
401 gras_trp_flush(gras_socket_t sd) {
402 if (sd->plugin->flush)
403 (sd->plugin->flush)(sd);
407 gras_trp_plugin_get_by_name(const char *name){
408 return xbt_dict_get(_gras_trp_plugins,name);
411 int gras_socket_my_port (gras_socket_t sock) {
414 int gras_socket_peer_port(gras_socket_t sock) {
415 return sock->peer_port;
417 char *gras_socket_peer_name(gras_socket_t sock) {
418 return sock->peer_name;
420 char *gras_socket_peer_proc(gras_socket_t sock) {
421 return sock->peer_proc;
424 void gras_socket_peer_proc_set(gras_socket_t sock,char*peer_proc) {
425 sock->peer_proc = peer_proc;
428 /** \brief Check if the provided socket is a measurement one (or a regular one) */
429 int gras_socket_is_meas(gras_socket_t sock) {
433 /** \brief Send a chunk of (random) data over a measurement socket
435 * @param peer measurement socket to use for the experiment
436 * @param timeout timeout (in seconds)
437 * @param msg_size size of each chunk sent over the socket (in bytes).
438 * @param msg_amount how many of these packets you want to send.
440 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
441 * each side of the socket should be paired.
443 * The exchanged data is zeroed to make sure it's initialized, but
444 * there is no way to control what is sent (ie, you cannot use these
445 * functions to exchange data out of band).
447 * @warning: in SimGrid version 3.1 and previous, the numerical arguments
448 * were the total amount of data to send and the msg_size. This
449 * was changed for the fool wanting to send more than MAXINT
450 * bytes in a fat pipe.
452 void gras_socket_meas_send(gras_socket_t peer,
453 unsigned int timeout,
454 unsigned long int msg_size,
455 unsigned long int msg_amount) {
457 unsigned long int sent_sofar;
462 chunk=xbt_malloc0(msg_size);
464 xbt_assert0(peer->meas,"Asked to send measurement data on a regular socket");
465 xbt_assert0(peer->outgoing,"Socket not suited for data send (was created with gras_socket_server(), not gras_socket_client())");
467 for (sent_sofar=0; sent_sofar < msg_amount; sent_sofar++) {
468 CDEBUG5(gras_trp_meas,"Sent %lu msgs of %lu (size of each: %ld) to %s:%d",
469 sent_sofar,msg_amount,msg_size,
470 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
471 (*peer->plugin->raw_send)(peer,chunk,msg_size);
473 CDEBUG5(gras_trp_meas,"Sent %lu msgs of %lu (size of each: %ld) to %s:%d",
474 sent_sofar,msg_amount,msg_size,
475 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
483 /** \brief Receive a chunk of data over a measurement socket
485 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
486 * each side of the socket should be paired.
488 * @warning: in SimGrid version 3.1 and previous, the numerical arguments
489 * were the total amount of data to send and the msg_size. This
490 * was changed for the fool wanting to send more than MAXINT
491 * bytes in a fat pipe.
493 void gras_socket_meas_recv(gras_socket_t peer,
494 unsigned int timeout,
495 unsigned long int msg_size,
496 unsigned long int msg_amount){
499 unsigned long int got_sofar;
504 chunk = xbt_malloc(msg_size);
506 xbt_assert0(peer->meas,
507 "Asked to receive measurement data on a regular socket");
508 xbt_assert0(peer->incoming,"Socket not suited for data receive");
510 for (got_sofar=0; got_sofar < msg_amount; got_sofar ++) {
511 CDEBUG5(gras_trp_meas,"Recvd %ld msgs of %lu (size of each: %ld) from %s:%d",
512 got_sofar,msg_amount,msg_size,
513 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
514 (peer->plugin->raw_recv)(peer,chunk,msg_size);
516 CDEBUG5(gras_trp_meas,"Recvd %ld msgs of %lu (size of each: %ld) from %s:%d",
517 got_sofar,msg_amount,msg_size,
518 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
526 * \brief Something similar to the good old accept system call.
528 * Make sure that there is someone speaking to the provided server socket.
529 * In RL, it does an accept(2) and return the result as last argument.
530 * In SG, as accepts are useless, it returns the provided argument as result.
531 * You should thus test whether (peer != accepted) before closing both of them.
533 * You should only call this on measurement sockets. It is automatically
534 * done for regular sockets, but you usually want more control about
535 * what's going on with measurement sockets.
537 gras_socket_t gras_socket_meas_accept(gras_socket_t peer){
540 xbt_assert0(peer->meas,
541 "No need to accept on non-measurement sockets (it's automatic)");
543 if (!peer->accepting) {
544 /* nothing to accept here (must be in SG) */
545 /* BUG: FIXME: this is BAD! it makes tricky to free the accepted socket*/
549 res = (peer->plugin->socket_accept)(peer);
550 res->meas = peer->meas;
551 CDEBUG1(gras_trp_meas,"meas_accepted onto %d",res->sd);
558 * Creating procdata for this module
560 static void *gras_trp_procdata_new(void) {
561 gras_trp_procdata_t res = xbt_new(s_gras_trp_procdata_t,1);
563 res->name = xbt_strdup("gras_trp");
565 res->sockets = xbt_dynar_new_sync(sizeof(gras_socket_t*), NULL);
572 * Freeing procdata for this module
574 static void gras_trp_procdata_free(void *data) {
575 gras_trp_procdata_t res = (gras_trp_procdata_t)data;
577 xbt_dynar_free(&( res->sockets ));
582 void gras_trp_socketset_dump(const char *name) {
583 gras_trp_procdata_t procdata =
584 (gras_trp_procdata_t)gras_libdata_by_id(gras_trp_libdata_id);
589 INFO1("** Dump the socket set %s",name);
590 xbt_dynar_foreach(procdata->sockets, it, s) {
591 INFO4(" %p -> %s:%d %s",
592 s,gras_socket_peer_name(s),gras_socket_peer_port(s),
593 s->valid?"(valid)":"(peer dead)");
595 INFO1("** End of socket set %s",name);
599 * Module registration
601 int gras_trp_libdata_id;
602 void gras_trp_register() {
603 gras_trp_libdata_id = gras_procdata_add("gras_trp",gras_trp_procdata_new, gras_trp_procdata_free);
606 int gras_os_myport(void) {
607 return ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport;