1 /* transport - low level communication */
3 /* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
12 int gras_opt_trp_nomoredata_on_close = 0;
17 #include "gras/Transport/transport_private.h"
18 #include "gras/Msg/msg_interface.h"
20 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_trp, gras,
21 "Conveying bytes over the network");
22 XBT_LOG_NEW_SUBCATEGORY(gras_trp_meas, gras_trp,
23 "Conveying bytes over the network without formating for perf measurements");
24 static short int _gras_trp_started = 0;
26 static xbt_dict_t _gras_trp_plugins; /* All registered plugins */
27 static void gras_trp_plugin_free(void *p); /* free one of the plugins */
29 static void gras_trp_plugin_new(const char *name, gras_trp_setup_t setup)
33 gras_trp_plugin_t plug = xbt_new0(s_gras_trp_plugin_t, 1);
35 DEBUG1("Create plugin %s", name);
37 plug->name = xbt_strdup(name);
42 if (e.category == mismatch_error) {
43 /* SG plugin raise mismatch when in RL mode (and vice versa) */
54 xbt_dict_set(_gras_trp_plugins, name, plug, gras_trp_plugin_free);
57 void gras_trp_init(void)
59 if (!_gras_trp_started) {
60 /* make room for all plugins */
61 _gras_trp_plugins = xbt_dict_new();
63 #ifdef HAVE_WINSOCK2_H
64 /* initialize the windows mechanism */
66 WORD wVersionRequested;
69 wVersionRequested = MAKEWORD(2, 0);
70 xbt_assert0(WSAStartup(wVersionRequested, &wsaData) == 0,
71 "Cannot find a usable WinSock DLL");
73 /* Confirm that the WinSock DLL supports 2.0. */
74 /* Note that if the DLL supports versions greater */
75 /* than 2.0 in addition to 2.0, it will still return */
76 /* 2.0 in wVersion since that is the version we */
79 xbt_assert0(LOBYTE(wsaData.wVersion) == 2 &&
80 HIBYTE(wsaData.wVersion) == 0,
81 "Cannot find a usable WinSock DLL");
82 INFO0("Found and initialized winsock2");
83 } /* The WinSock DLL is acceptable. Proceed. */
87 xbt_assert0(WSAStartup(0x0101, &wsaData) == 0,
88 "Cannot find a usable WinSock DLL");
89 INFO0("Found and initialized winsock");
94 gras_trp_plugin_new("file", gras_trp_file_setup);
95 gras_trp_plugin_new("sg", gras_trp_sg_setup);
96 gras_trp_plugin_new("tcp", gras_trp_tcp_setup);
102 void gras_trp_exit(void)
104 DEBUG1("gras_trp value %d", _gras_trp_started);
105 if (_gras_trp_started == 0) {
109 if (--_gras_trp_started == 0) {
110 #ifdef HAVE_WINSOCK_H
111 if (WSACleanup() == SOCKET_ERROR) {
112 if (WSAGetLastError() == WSAEINPROGRESS) {
113 WSACancelBlockingCall();
119 /* Delete the plugins */
120 xbt_dict_free(&_gras_trp_plugins);
125 void gras_trp_plugin_free(void *p)
127 gras_trp_plugin_t plug = p;
132 } else if (plug->data) {
133 DEBUG1("Plugin %s lacks exit(). Free data anyway.", plug->name);
144 * gras_trp_socket_new:
146 * Malloc a new socket, and initialize it with defaults
148 void gras_trp_socket_new(int incoming, gras_socket_t * dst)
151 gras_socket_t sock = xbt_new0(s_gras_socket_t, 1);
153 VERB1("Create a new socket (%p)", (void *) sock);
157 sock->incoming = incoming ? 1 : 0;
158 sock->outgoing = incoming ? 0 : 1;
159 sock->accepting = incoming ? 1 : 0;
167 sock->peer_port = -1;
168 sock->peer_name = NULL;
169 sock->peer_proc = NULL;
172 sock->bufdata = NULL;
180 * @brief Opens a server socket and makes it ready to be listened to.
181 * @param port: port on which you want to listen
182 * @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)
183 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
185 * In real life, you'll get a TCP socket.
188 gras_socket_server_ext(unsigned short port,
189 unsigned long int buf_size, int measurement)
193 gras_trp_plugin_t trp;
196 DEBUG2("Create a server socket from plugin %s on port %d",
197 gras_if_RL()? "tcp" : "sg", port);
198 trp = gras_trp_plugin_get_by_name(gras_if_SG()? "sg" : "tcp");
200 /* defaults settings */
201 gras_trp_socket_new(1, &sock);
204 sock->buf_size = buf_size > 0 ? buf_size : 32 * 1024;
205 sock->meas = measurement;
207 /* Call plugin socket creation function */
208 DEBUG1("Prepare socket with plugin (fct=%p)", trp->socket_server);
210 trp->socket_server(trp, sock);
211 DEBUG3("in=%c out=%c accept=%c",
212 sock->incoming ? 'y' : 'n',
213 sock->outgoing ? 'y' : 'n', sock->accepting ? 'y' : 'n');
221 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport =
223 xbt_dynar_push(((gras_trp_procdata_t)
224 gras_libdata_by_id(gras_trp_libdata_id))->sockets, &sock);
226 gras_msg_listener_awake();
231 * @brief Opens a server socket on any port in the given range
233 * @param minport: first port we will try
234 * @param maxport: last port we will try
235 * @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)
236 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
238 * If none of the provided ports works, raises the exception got when trying the last possibility
241 gras_socket_server_range(unsigned short minport, unsigned short maxport,
242 unsigned long int buf_size, int measurement)
246 gras_socket_t res = NULL;
249 for (port = minport; port < maxport; port++) {
251 res = gras_socket_server_ext(port, buf_size, measurement);
265 * @brief Opens a client socket to a remote host.
266 * @param host: who you want to connect to
267 * @param port: where you want to connect to on this host
268 * @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)
269 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
271 * In real life, you'll get a TCP socket.
274 gras_socket_client_ext(const char *host,
276 unsigned long int buf_size, int measurement)
280 gras_trp_plugin_t trp;
283 trp = gras_trp_plugin_get_by_name(gras_if_SG()? "sg" : "tcp");
285 DEBUG1("Create a client socket from plugin %s", gras_if_RL()? "tcp" : "sg");
286 /* defaults settings */
287 gras_trp_socket_new(0, &sock);
289 sock->peer_port = port;
290 sock->peer_name = (char *) strdup(host ? host : "localhost");
291 sock->buf_size = buf_size > 0 ? buf_size : 32 * 1024;
292 sock->meas = measurement;
294 /* plugin-specific */
296 (*trp->socket_client) (trp, sock);
297 DEBUG3("in=%c out=%c accept=%c",
298 sock->incoming ? 'y' : 'n',
299 sock->outgoing ? 'y' : 'n', sock->accepting ? 'y' : 'n');
304 xbt_dynar_push(((gras_trp_procdata_t)
305 gras_libdata_by_id(gras_trp_libdata_id))->sockets, &sock);
306 gras_msg_listener_awake();
311 * @brief Opens a server socket and make it ready to be listened to.
313 * In real life, you'll get a TCP socket.
315 gras_socket_t gras_socket_server(unsigned short port)
317 return gras_socket_server_ext(port, 32 * 1024, 0);
320 /** @brief Opens a client socket to a remote host */
321 gras_socket_t gras_socket_client(const char *host, unsigned short port)
323 return gras_socket_client_ext(host, port, 0, 0);
326 /** @brief Opens a client socket to a remote host specified as '\a host:\a port' */
327 gras_socket_t gras_socket_client_from_string(const char *host)
329 xbt_peer_t p = xbt_peer_from_string(host);
330 gras_socket_t res = gras_socket_client_ext(p->name, p->port, 0, 0);
335 void gras_socket_close_voidp(void *sock) {
336 gras_socket_close((gras_socket_t)sock);
339 /** \brief Close socket */
340 void gras_socket_close(gras_socket_t sock)
342 xbt_dynar_t sockets =
343 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
344 gras_socket_t sock_iter = NULL;
348 VERB1("Close %p", sock);
349 if (sock == _gras_lastly_selected_socket) {
350 xbt_assert0(!gras_opt_trp_nomoredata_on_close || !sock->moredata,
351 "Closing a socket having more data in buffer while the nomoredata_on_close option is activated");
355 ("Closing a socket having more data in buffer. Option nomoredata_on_close disabled, so continuing.");
356 _gras_lastly_selected_socket = NULL;
359 /* FIXME: Issue an event when the socket is closed */
360 DEBUG1("sockets pointer before %p", sockets);
362 /* FIXME: Cannot get the dynar mutex, because it can be already locked */
363 // _xbt_dynar_foreach(sockets,cursor,sock_iter) {
364 for (cursor = 0; cursor < xbt_dynar_length(sockets); cursor++) {
365 _xbt_dynar_cursor_get(sockets, cursor, &sock_iter);
366 if (sock == sock_iter) {
367 DEBUG2("remove sock cursor %d dize %lu\n", cursor,
368 xbt_dynar_length(sockets));
369 xbt_dynar_cursor_rm(sockets, &cursor);
370 if (sock->plugin->socket_close)
371 (*sock->plugin->socket_close) (sock);
373 /* free the memory */
375 free(sock->peer_name);
381 WARN1("Ignoring request to free an unknown socket (%p). Execution stack:",
383 xbt_backtrace_display_current();
391 * Send a bunch of bytes from on socket
392 * (stable if we know the storage will keep as is until the next trp_flush)
394 void gras_trp_send(gras_socket_t sd, char *data, long int size, int stable)
396 xbt_assert0(sd->outgoing, "Socket not suited for data send");
397 (*sd->plugin->send) (sd, data, size, stable);
401 * gras_trp_chunk_recv:
403 * Receive a bunch of bytes from a socket
405 void gras_trp_recv(gras_socket_t sd, char *data, long int size)
407 xbt_assert0(sd->incoming, "Socket not suited for data receive");
408 (sd->plugin->recv) (sd, data, size);
414 * Make sure all pending communications are done
416 void gras_trp_flush(gras_socket_t sd)
418 if (sd->plugin->flush)
419 (sd->plugin->flush) (sd);
422 gras_trp_plugin_t gras_trp_plugin_get_by_name(const char *name)
424 return xbt_dict_get(_gras_trp_plugins, name);
427 int gras_socket_my_port(gras_socket_t sock)
432 int gras_socket_peer_port(gras_socket_t sock)
434 return sock->peer_port;
437 char *gras_socket_peer_name(gras_socket_t sock)
439 return sock->peer_name;
442 char *gras_socket_peer_proc(gras_socket_t sock)
444 return sock->peer_proc;
447 void gras_socket_peer_proc_set(gras_socket_t sock, char *peer_proc)
449 sock->peer_proc = peer_proc;
452 /** \brief Check if the provided socket is a measurement one (or a regular one) */
453 int gras_socket_is_meas(gras_socket_t sock)
458 /** \brief Send a chunk of (random) data over a measurement socket
460 * @param peer measurement socket to use for the experiment
461 * @param timeout timeout (in seconds)
462 * @param msg_size size of each chunk sent over the socket (in bytes).
463 * @param msg_amount how many of these packets you want to send.
465 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
466 * each side of the socket should be paired.
468 * The exchanged data is zeroed to make sure it's initialized, but
469 * there is no way to control what is sent (ie, you cannot use these
470 * functions to exchange data out of band).
472 * @warning: in SimGrid version 3.1 and previous, the numerical arguments
473 * were the total amount of data to send and the msg_size. This
474 * was changed for the fool wanting to send more than MAXINT
475 * bytes in a fat pipe.
477 void gras_socket_meas_send(gras_socket_t peer,
478 unsigned int timeout,
479 unsigned long int msg_size,
480 unsigned long int msg_amount)
483 unsigned long int sent_sofar;
488 chunk = xbt_malloc0(msg_size);
490 xbt_assert0(peer->meas,
491 "Asked to send measurement data on a regular socket");
492 xbt_assert0(peer->outgoing,
493 "Socket not suited for data send (was created with gras_socket_server(), not gras_socket_client())");
495 for (sent_sofar = 0; sent_sofar < msg_amount; sent_sofar++) {
496 CDEBUG5(gras_trp_meas,
497 "Sent %lu msgs of %lu (size of each: %ld) to %s:%d", sent_sofar,
498 msg_amount, msg_size, gras_socket_peer_name(peer),
499 gras_socket_peer_port(peer));
500 (*peer->plugin->raw_send) (peer, chunk, msg_size);
502 CDEBUG5(gras_trp_meas, "Sent %lu msgs of %lu (size of each: %ld) to %s:%d",
503 sent_sofar, msg_amount, msg_size,
504 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
512 /** \brief Receive a chunk of data over a measurement socket
514 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
515 * each side of the socket should be paired.
517 * @warning: in SimGrid version 3.1 and previous, the numerical arguments
518 * were the total amount of data to send and the msg_size. This
519 * was changed for the fool wanting to send more than MAXINT
520 * bytes in a fat pipe.
522 void gras_socket_meas_recv(gras_socket_t peer,
523 unsigned int timeout,
524 unsigned long int msg_size,
525 unsigned long int msg_amount)
529 unsigned long int got_sofar;
534 chunk = xbt_malloc(msg_size);
536 xbt_assert0(peer->meas,
537 "Asked to receive measurement data on a regular socket");
538 xbt_assert0(peer->incoming, "Socket not suited for data receive");
540 for (got_sofar = 0; got_sofar < msg_amount; got_sofar++) {
541 CDEBUG5(gras_trp_meas,
542 "Recvd %ld msgs of %lu (size of each: %ld) from %s:%d", got_sofar,
543 msg_amount, msg_size, gras_socket_peer_name(peer),
544 gras_socket_peer_port(peer));
545 (peer->plugin->raw_recv) (peer, chunk, msg_size);
547 CDEBUG5(gras_trp_meas,
548 "Recvd %ld msgs of %lu (size of each: %ld) from %s:%d", got_sofar,
549 msg_amount, msg_size, gras_socket_peer_name(peer),
550 gras_socket_peer_port(peer));
558 * \brief Something similar to the good old accept system call.
560 * Make sure that there is someone speaking to the provided server socket.
561 * In RL, it does an accept(2) and return the result as last argument.
562 * In SG, as accepts are useless, it returns the provided argument as result.
563 * You should thus test whether (peer != accepted) before closing both of them.
565 * You should only call this on measurement sockets. It is automatically
566 * done for regular sockets, but you usually want more control about
567 * what's going on with measurement sockets.
569 gras_socket_t gras_socket_meas_accept(gras_socket_t peer)
573 xbt_assert0(peer->meas,
574 "No need to accept on non-measurement sockets (it's automatic)");
576 if (!peer->accepting) {
577 /* nothing to accept here (must be in SG) */
578 /* BUG: FIXME: this is BAD! it makes tricky to free the accepted socket */
582 res = (peer->plugin->socket_accept) (peer);
583 res->meas = peer->meas;
584 CDEBUG1(gras_trp_meas, "meas_accepted onto %d", res->sd);
591 * Creating procdata for this module
593 static void *gras_trp_procdata_new(void)
595 gras_trp_procdata_t res = xbt_new(s_gras_trp_procdata_t, 1);
597 res->name = xbt_strdup("gras_trp");
599 res->sockets = xbt_dynar_new_sync(sizeof(gras_socket_t *), NULL);
606 * Freeing procdata for this module
608 static void gras_trp_procdata_free(void *data)
610 gras_trp_procdata_t res = (gras_trp_procdata_t) data;
612 xbt_dynar_free(&(res->sockets));
617 void gras_trp_socketset_dump(const char *name)
619 gras_trp_procdata_t procdata =
620 (gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id);
625 INFO1("** Dump the socket set %s", name);
626 xbt_dynar_foreach(procdata->sockets, it, s) {
627 INFO4(" %p -> %s:%d %s",
628 s, gras_socket_peer_name(s), gras_socket_peer_port(s),
629 s->valid ? "(valid)" : "(peer dead)");
631 INFO1("** End of socket set %s", name);
635 * Module registration
637 int gras_trp_libdata_id;
638 void gras_trp_register()
640 gras_trp_libdata_id =
641 gras_procdata_add("gras_trp", gras_trp_procdata_new,
642 gras_trp_procdata_free);
645 int gras_os_myport(void)
647 return ((gras_trp_procdata_t)
648 gras_libdata_by_id(gras_trp_libdata_id))->myport;