1 /* transport - low level communication */
3 /* Copyright (c) 2004 Martin Quinson. All rights reserved. */
5 /* This program is free software; you can redistribute it and/or modify it
6 * under the terms of the license (GNU LGPL) which comes with this package. */
11 int gras_opt_trp_nomoredata_on_close = 0;
16 #include "gras/Transport/transport_private.h"
17 #include "gras/Msg/msg_interface.h"
19 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_trp, gras,
20 "Conveying bytes over the network");
21 XBT_LOG_NEW_SUBCATEGORY(gras_trp_meas, gras_trp,
22 "Conveying bytes over the network without formating for perf measurements");
23 static short int _gras_trp_started = 0;
25 static xbt_dict_t _gras_trp_plugins; /* All registered plugins */
26 static void gras_trp_plugin_free(void *p); /* free one of the plugins */
28 static void gras_trp_plugin_new(const char *name, gras_trp_setup_t setup)
32 gras_trp_plugin_t plug = xbt_new0(s_gras_trp_plugin_t, 1);
34 DEBUG1("Create plugin %s", name);
36 plug->name = xbt_strdup(name);
41 if (e.category == mismatch_error) {
42 /* SG plugin raise mismatch when in RL mode (and vice versa) */
53 xbt_dict_set(_gras_trp_plugins, name, plug, gras_trp_plugin_free);
56 void gras_trp_init(void)
58 if (!_gras_trp_started) {
59 /* make room for all plugins */
60 _gras_trp_plugins = xbt_dict_new();
62 #ifdef HAVE_WINSOCK2_H
63 /* initialize the windows mechanism */
65 WORD wVersionRequested;
68 wVersionRequested = MAKEWORD(2, 0);
69 xbt_assert0(WSAStartup(wVersionRequested, &wsaData) == 0,
70 "Cannot find a usable WinSock DLL");
72 /* Confirm that the WinSock DLL supports 2.0. */
73 /* Note that if the DLL supports versions greater */
74 /* than 2.0 in addition to 2.0, it will still return */
75 /* 2.0 in wVersion since that is the version we */
78 xbt_assert0(LOBYTE(wsaData.wVersion) == 2 &&
79 HIBYTE(wsaData.wVersion) == 0,
80 "Cannot find a usable WinSock DLL");
81 INFO0("Found and initialized winsock2");
82 } /* The WinSock DLL is acceptable. Proceed. */
86 xbt_assert0(WSAStartup(0x0101, &wsaData) == 0,
87 "Cannot find a usable WinSock DLL");
88 INFO0("Found and initialized winsock");
93 gras_trp_plugin_new("file", gras_trp_file_setup);
94 gras_trp_plugin_new("sg", gras_trp_sg_setup);
95 gras_trp_plugin_new("tcp", gras_trp_tcp_setup);
101 void gras_trp_exit(void)
103 DEBUG1("gras_trp value %d", _gras_trp_started);
104 if (_gras_trp_started == 0) {
108 if (--_gras_trp_started == 0) {
109 #ifdef HAVE_WINSOCK_H
110 if (WSACleanup() == SOCKET_ERROR) {
111 if (WSAGetLastError() == WSAEINPROGRESS) {
112 WSACancelBlockingCall();
118 /* Delete the plugins */
119 xbt_dict_free(&_gras_trp_plugins);
124 void gras_trp_plugin_free(void *p)
126 gras_trp_plugin_t plug = p;
131 } else if (plug->data) {
132 DEBUG1("Plugin %s lacks exit(). Free data anyway.", plug->name);
143 * gras_trp_socket_new:
145 * Malloc a new socket, and initialize it with defaults
147 void gras_trp_socket_new(int incoming, gras_socket_t * dst)
150 gras_socket_t sock = xbt_new0(s_gras_socket_t, 1);
152 VERB1("Create a new socket (%p)", (void *) sock);
156 sock->incoming = incoming ? 1 : 0;
157 sock->outgoing = incoming ? 0 : 1;
158 sock->accepting = incoming ? 1 : 0;
166 sock->peer_port = -1;
167 sock->peer_name = NULL;
168 sock->peer_proc = NULL;
171 sock->bufdata = NULL;
179 * @brief Opens a server socket and makes it ready to be listened to.
180 * @param port: port on which you want to listen
181 * @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)
182 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
184 * In real life, you'll get a TCP socket.
187 gras_socket_server_ext(unsigned short port,
188 unsigned long int buf_size, int measurement)
192 gras_trp_plugin_t trp;
195 DEBUG2("Create a server socket from plugin %s on port %d",
196 gras_if_RL()? "tcp" : "sg", port);
197 trp = gras_trp_plugin_get_by_name(gras_if_SG()? "sg" : "tcp");
199 /* defaults settings */
200 gras_trp_socket_new(1, &sock);
203 sock->buf_size = buf_size > 0 ? buf_size : 32 * 1024;
204 sock->meas = measurement;
206 /* Call plugin socket creation function */
207 DEBUG1("Prepare socket with plugin (fct=%p)", trp->socket_server);
209 trp->socket_server(trp, sock);
210 DEBUG3("in=%c out=%c accept=%c",
211 sock->incoming ? 'y' : 'n',
212 sock->outgoing ? 'y' : 'n', sock->accepting ? 'y' : 'n');
220 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport =
222 xbt_dynar_push(((gras_trp_procdata_t)
223 gras_libdata_by_id(gras_trp_libdata_id))->sockets, &sock);
225 gras_msg_listener_awake();
230 * @brief Opens a server socket on any port in the given range
232 * @param minport: first port we will try
233 * @param maxport: last port we will try
234 * @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)
235 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
237 * If none of the provided ports works, raises the exception got when trying the last possibility
240 gras_socket_server_range(unsigned short minport, unsigned short maxport,
241 unsigned long int buf_size, int measurement)
245 gras_socket_t res = NULL;
248 for (port = minport; port < maxport; port++) {
250 res = gras_socket_server_ext(port, buf_size, measurement);
264 * @brief Opens a client socket to a remote host.
265 * @param host: who you want to connect to
266 * @param port: where you want to connect to on this host
267 * @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)
268 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
270 * In real life, you'll get a TCP socket.
273 gras_socket_client_ext(const char *host,
275 unsigned long int buf_size, int measurement)
279 gras_trp_plugin_t trp;
282 trp = gras_trp_plugin_get_by_name(gras_if_SG()? "sg" : "tcp");
284 DEBUG1("Create a client socket from plugin %s", gras_if_RL()? "tcp" : "sg");
285 /* defaults settings */
286 gras_trp_socket_new(0, &sock);
288 sock->peer_port = port;
289 sock->peer_name = (char *) strdup(host ? host : "localhost");
290 sock->buf_size = buf_size > 0 ? buf_size : 32 * 1024;
291 sock->meas = measurement;
293 /* plugin-specific */
295 (*trp->socket_client) (trp, sock);
296 DEBUG3("in=%c out=%c accept=%c",
297 sock->incoming ? 'y' : 'n',
298 sock->outgoing ? 'y' : 'n', sock->accepting ? 'y' : 'n');
303 xbt_dynar_push(((gras_trp_procdata_t)
304 gras_libdata_by_id(gras_trp_libdata_id))->sockets, &sock);
305 gras_msg_listener_awake();
310 * @brief Opens a server socket and make it ready to be listened to.
312 * In real life, you'll get a TCP socket.
314 gras_socket_t gras_socket_server(unsigned short port)
316 return gras_socket_server_ext(port, 32 * 1024, 0);
319 /** @brief Opens a client socket to a remote host */
320 gras_socket_t gras_socket_client(const char *host, unsigned short port)
322 return gras_socket_client_ext(host, port, 0, 0);
325 /** @brief Opens a client socket to a remote host specified as '\a host:\a port' */
326 gras_socket_t gras_socket_client_from_string(const char *host)
328 xbt_peer_t p = xbt_peer_from_string(host);
329 gras_socket_t res = gras_socket_client_ext(p->name, p->port, 0, 0);
334 void gras_socket_close_voidp(void *sock) {
335 gras_socket_close((gras_socket_t)sock);
338 /** \brief Close socket */
339 void gras_socket_close(gras_socket_t sock)
341 xbt_dynar_t sockets =
342 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
343 gras_socket_t sock_iter = NULL;
347 VERB1("Close %p", sock);
348 if (sock == _gras_lastly_selected_socket) {
349 xbt_assert0(!gras_opt_trp_nomoredata_on_close || !sock->moredata,
350 "Closing a socket having more data in buffer while the nomoredata_on_close option is activated");
354 ("Closing a socket having more data in buffer. Option nomoredata_on_close disabled, so continuing.");
355 _gras_lastly_selected_socket = NULL;
358 /* FIXME: Issue an event when the socket is closed */
359 DEBUG1("sockets pointer before %p", sockets);
361 /* FIXME: Cannot get the dynar mutex, because it can be already locked */
362 // _xbt_dynar_foreach(sockets,cursor,sock_iter) {
363 for (cursor = 0; cursor < xbt_dynar_length(sockets); cursor++) {
364 _xbt_dynar_cursor_get(sockets, cursor, &sock_iter);
365 if (sock == sock_iter) {
366 DEBUG2("remove sock cursor %d dize %lu\n", cursor,
367 xbt_dynar_length(sockets));
368 xbt_dynar_cursor_rm(sockets, &cursor);
369 if (sock->plugin->socket_close)
370 (*sock->plugin->socket_close) (sock);
372 /* free the memory */
374 free(sock->peer_name);
380 WARN1("Ignoring request to free an unknown socket (%p). Execution stack:",
382 xbt_backtrace_display_current();
390 * Send a bunch of bytes from on socket
391 * (stable if we know the storage will keep as is until the next trp_flush)
393 void gras_trp_send(gras_socket_t sd, char *data, long int size, int stable)
395 xbt_assert0(sd->outgoing, "Socket not suited for data send");
396 (*sd->plugin->send) (sd, data, size, stable);
400 * gras_trp_chunk_recv:
402 * Receive a bunch of bytes from a socket
404 void gras_trp_recv(gras_socket_t sd, char *data, long int size)
406 xbt_assert0(sd->incoming, "Socket not suited for data receive");
407 (sd->plugin->recv) (sd, data, size);
413 * Make sure all pending communications are done
415 void gras_trp_flush(gras_socket_t sd)
417 if (sd->plugin->flush)
418 (sd->plugin->flush) (sd);
421 gras_trp_plugin_t gras_trp_plugin_get_by_name(const char *name)
423 return xbt_dict_get(_gras_trp_plugins, name);
426 int gras_socket_my_port(gras_socket_t sock)
431 int gras_socket_peer_port(gras_socket_t sock)
433 return sock->peer_port;
436 char *gras_socket_peer_name(gras_socket_t sock)
438 return sock->peer_name;
441 char *gras_socket_peer_proc(gras_socket_t sock)
443 return sock->peer_proc;
446 void gras_socket_peer_proc_set(gras_socket_t sock, char *peer_proc)
448 sock->peer_proc = peer_proc;
451 /** \brief Check if the provided socket is a measurement one (or a regular one) */
452 int gras_socket_is_meas(gras_socket_t sock)
457 /** \brief Send a chunk of (random) data over a measurement socket
459 * @param peer measurement socket to use for the experiment
460 * @param timeout timeout (in seconds)
461 * @param msg_size size of each chunk sent over the socket (in bytes).
462 * @param msg_amount how many of these packets you want to send.
464 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
465 * each side of the socket should be paired.
467 * The exchanged data is zeroed to make sure it's initialized, but
468 * there is no way to control what is sent (ie, you cannot use these
469 * functions to exchange data out of band).
471 * @warning: in SimGrid version 3.1 and previous, the numerical arguments
472 * were the total amount of data to send and the msg_size. This
473 * was changed for the fool wanting to send more than MAXINT
474 * bytes in a fat pipe.
476 void gras_socket_meas_send(gras_socket_t peer,
477 unsigned int timeout,
478 unsigned long int msg_size,
479 unsigned long int msg_amount)
482 unsigned long int sent_sofar;
487 chunk = xbt_malloc0(msg_size);
489 xbt_assert0(peer->meas,
490 "Asked to send measurement data on a regular socket");
491 xbt_assert0(peer->outgoing,
492 "Socket not suited for data send (was created with gras_socket_server(), not gras_socket_client())");
494 for (sent_sofar = 0; sent_sofar < msg_amount; sent_sofar++) {
495 CDEBUG5(gras_trp_meas,
496 "Sent %lu msgs of %lu (size of each: %ld) to %s:%d", sent_sofar,
497 msg_amount, msg_size, gras_socket_peer_name(peer),
498 gras_socket_peer_port(peer));
499 (*peer->plugin->raw_send) (peer, chunk, msg_size);
501 CDEBUG5(gras_trp_meas, "Sent %lu msgs of %lu (size of each: %ld) to %s:%d",
502 sent_sofar, msg_amount, msg_size,
503 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
511 /** \brief Receive a chunk of data over a measurement socket
513 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
514 * each side of the socket should be paired.
516 * @warning: in SimGrid version 3.1 and previous, the numerical arguments
517 * were the total amount of data to send and the msg_size. This
518 * was changed for the fool wanting to send more than MAXINT
519 * bytes in a fat pipe.
521 void gras_socket_meas_recv(gras_socket_t peer,
522 unsigned int timeout,
523 unsigned long int msg_size,
524 unsigned long int msg_amount)
528 unsigned long int got_sofar;
533 chunk = xbt_malloc(msg_size);
535 xbt_assert0(peer->meas,
536 "Asked to receive measurement data on a regular socket");
537 xbt_assert0(peer->incoming, "Socket not suited for data receive");
539 for (got_sofar = 0; got_sofar < msg_amount; got_sofar++) {
540 CDEBUG5(gras_trp_meas,
541 "Recvd %ld msgs of %lu (size of each: %ld) from %s:%d", got_sofar,
542 msg_amount, msg_size, gras_socket_peer_name(peer),
543 gras_socket_peer_port(peer));
544 (peer->plugin->raw_recv) (peer, chunk, msg_size);
546 CDEBUG5(gras_trp_meas,
547 "Recvd %ld msgs of %lu (size of each: %ld) from %s:%d", got_sofar,
548 msg_amount, msg_size, gras_socket_peer_name(peer),
549 gras_socket_peer_port(peer));
557 * \brief Something similar to the good old accept system call.
559 * Make sure that there is someone speaking to the provided server socket.
560 * In RL, it does an accept(2) and return the result as last argument.
561 * In SG, as accepts are useless, it returns the provided argument as result.
562 * You should thus test whether (peer != accepted) before closing both of them.
564 * You should only call this on measurement sockets. It is automatically
565 * done for regular sockets, but you usually want more control about
566 * what's going on with measurement sockets.
568 gras_socket_t gras_socket_meas_accept(gras_socket_t peer)
572 xbt_assert0(peer->meas,
573 "No need to accept on non-measurement sockets (it's automatic)");
575 if (!peer->accepting) {
576 /* nothing to accept here (must be in SG) */
577 /* BUG: FIXME: this is BAD! it makes tricky to free the accepted socket */
581 res = (peer->plugin->socket_accept) (peer);
582 res->meas = peer->meas;
583 CDEBUG1(gras_trp_meas, "meas_accepted onto %d", res->sd);
590 * Creating procdata for this module
592 static void *gras_trp_procdata_new(void)
594 gras_trp_procdata_t res = xbt_new(s_gras_trp_procdata_t, 1);
596 res->name = xbt_strdup("gras_trp");
598 res->sockets = xbt_dynar_new_sync(sizeof(gras_socket_t *), NULL);
605 * Freeing procdata for this module
607 static void gras_trp_procdata_free(void *data)
609 gras_trp_procdata_t res = (gras_trp_procdata_t) data;
611 xbt_dynar_free(&(res->sockets));
616 void gras_trp_socketset_dump(const char *name)
618 gras_trp_procdata_t procdata =
619 (gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id);
624 INFO1("** Dump the socket set %s", name);
625 xbt_dynar_foreach(procdata->sockets, it, s) {
626 INFO4(" %p -> %s:%d %s",
627 s, gras_socket_peer_name(s), gras_socket_peer_port(s),
628 s->valid ? "(valid)" : "(peer dead)");
630 INFO1("** End of socket set %s", name);
634 * Module registration
636 int gras_trp_libdata_id;
637 void gras_trp_register()
639 gras_trp_libdata_id =
640 gras_procdata_add("gras_trp", gras_trp_procdata_new,
641 gras_trp_procdata_free);
644 int gras_os_myport(void)
646 return ((gras_trp_procdata_t)
647 gras_libdata_by_id(gras_trp_libdata_id))->myport;