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"
19 #include "gras/Msg/msg_interface.h"
21 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_trp,gras,"Conveying bytes over the network");
22 XBT_LOG_NEW_SUBCATEGORY(gras_trp_meas,gras_trp,"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 */
29 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){
57 if (!_gras_trp_started) {
58 /* make room for all plugins */
59 _gras_trp_plugins=xbt_dict_new();
61 #ifdef HAVE_WINSOCK2_H
62 /* initialize the windows mechanism */
64 WORD wVersionRequested;
67 wVersionRequested = MAKEWORD( 2, 0 );
68 xbt_assert0(WSAStartup( wVersionRequested, &wsaData ) == 0,
69 "Cannot find a usable WinSock DLL");
71 /* Confirm that the WinSock DLL supports 2.0.*/
72 /* Note that if the DLL supports versions greater */
73 /* than 2.0 in addition to 2.0, it will still return */
74 /* 2.0 in wVersion since that is the version we */
77 xbt_assert0(LOBYTE( wsaData.wVersion ) == 2 &&
78 HIBYTE( wsaData.wVersion ) == 0,
79 "Cannot find a usable WinSock DLL");
80 INFO0("Found and initialized winsock2");
81 } /* The WinSock DLL is acceptable. Proceed. */
84 xbt_assert0(WSAStartup( 0x0101, &wsaData ) == 0,
85 "Cannot find a usable WinSock DLL");
86 INFO0("Found and initialized winsock");
91 gras_trp_plugin_new("file",gras_trp_file_setup);
92 gras_trp_plugin_new("sg",gras_trp_sg_setup);
93 gras_trp_plugin_new("tcp", gras_trp_tcp_setup);
101 DEBUG1("gras_trp value %d",_gras_trp_started);
102 if (_gras_trp_started == 0) {
106 if ( --_gras_trp_started == 0 ) {
107 #ifdef HAVE_WINSOCK_H
108 if ( WSACleanup() == SOCKET_ERROR ) {
109 if ( WSAGetLastError() == WSAEINPROGRESS ) {
110 WSACancelBlockingCall();
116 /* Delete the plugins */
117 xbt_dict_free(&_gras_trp_plugins);
122 void gras_trp_plugin_free(void *p) {
123 gras_trp_plugin_t plug = p;
128 } else if (plug->data) {
129 DEBUG1("Plugin %s lacks exit(). Free data anyway.",plug->name);
140 * gras_trp_socket_new:
142 * Malloc a new socket, and initialize it with defaults
144 void gras_trp_socket_new(int incoming,
145 gras_socket_t *dst) {
147 gras_socket_t sock=xbt_new0(s_gras_socket_t,1);
149 VERB1("Create a new socket (%p)", (void*)sock);
153 sock->incoming = incoming ? 1:0;
154 sock->outgoing = incoming ? 0:1;
155 sock->accepting = incoming ? 1:0;
163 sock->peer_port = -1;
164 sock->peer_name = NULL;
165 sock->peer_proc = NULL;
168 sock->bufdata = NULL;
176 * @brief Opens a server socket and makes it ready to be listened to.
177 * @param port: port on which you want to listen
178 * @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)
179 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
181 * In real life, you'll get a TCP socket.
184 gras_socket_server_ext(unsigned short port,
186 unsigned long int buf_size,
190 gras_trp_plugin_t trp;
193 DEBUG2("Create a server socket from plugin %s on port %d",
194 gras_if_RL() ? "tcp" : "sg",
196 trp = gras_trp_plugin_get_by_name(gras_if_SG() ? "sg":"tcp");
198 /* defaults settings */
199 gras_trp_socket_new(1,&sock);
202 sock->buf_size = buf_size>0 ? buf_size : 32*1024;
203 sock->meas = measurement;
205 /* Call plugin socket creation function */
206 DEBUG1("Prepare socket with plugin (fct=%p)",trp->socket_server);
208 trp->socket_server(trp, sock);
209 DEBUG3("in=%c out=%c accept=%c",
210 sock->incoming?'y':'n',
211 sock->outgoing?'y':'n',
212 sock->accepting?'y':'n');
220 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport = port;
221 xbt_dynar_push(((gras_trp_procdata_t)
222 gras_libdata_by_id(gras_trp_libdata_id))->sockets,&sock);
224 gras_msg_listener_awake();
228 * @brief Opens a server socket on any port in the given range
230 * @param minport: first port we will try
231 * @param maxport: last port we will try
232 * @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)
233 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
235 * If none of the provided ports works, raises the exception got when trying the last possibility
238 gras_socket_server_range(unsigned short minport, unsigned short maxport,
239 unsigned long int buf_size, int measurement) {
242 gras_socket_t res=NULL;
245 for (port=minport; port<maxport;port ++) {
247 res=gras_socket_server_ext(port,buf_size,measurement);
260 * @brief Opens a client socket to a remote host.
261 * @param host: who you want to connect to
262 * @param port: where you want to connect to on this host
263 * @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)
264 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
266 * In real life, you'll get a TCP socket.
269 gras_socket_client_ext(const char *host,
272 unsigned long int buf_size,
276 gras_trp_plugin_t trp;
279 trp = gras_trp_plugin_get_by_name(gras_if_SG() ? "sg":"tcp");
281 DEBUG1("Create a client socket from plugin %s",gras_if_RL() ? "tcp" : "sg");
282 /* defaults settings */
283 gras_trp_socket_new(0,&sock);
285 sock->peer_port = port;
286 sock->peer_name = (char*)strdup(host?host:"localhost");
287 sock->buf_size = buf_size>0 ? buf_size: 32*1024;
288 sock->meas = measurement;
290 /* plugin-specific */
292 (*trp->socket_client)(trp, sock);
293 DEBUG3("in=%c out=%c accept=%c",
294 sock->incoming?'y':'n',
295 sock->outgoing?'y':'n',
296 sock->accepting?'y':'n');
301 xbt_dynar_push(((gras_trp_procdata_t)
302 gras_libdata_by_id(gras_trp_libdata_id))->sockets,&sock);
303 gras_msg_listener_awake();
308 * @brief Opens a server socket and make it ready to be listened to.
310 * In real life, you'll get a TCP socket.
313 gras_socket_server(unsigned short port) {
314 return gras_socket_server_ext(port,32*1024,0);
317 /** @brief Opens a client socket to a remote host */
319 gras_socket_client(const char *host,
320 unsigned short port) {
321 return gras_socket_client_ext(host,port,0,0);
324 /** @brief Opens a client socket to a remote host specified as '\a host:\a port' */
326 gras_socket_client_from_string(const char *host) {
327 xbt_peer_t p = xbt_peer_from_string(host);
328 gras_socket_t res = gras_socket_client_ext(p->name,p->port,0,0);
333 /** \brief Close socket */
334 void gras_socket_close(gras_socket_t sock) {
335 xbt_dynar_t sockets = ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
336 gras_socket_t sock_iter = NULL;
340 VERB1("Close %p",sock);
341 if (sock == _gras_lastly_selected_socket) {
342 xbt_assert0(!gras_opt_trp_nomoredata_on_close || !sock->moredata,
343 "Closing a socket having more data in buffer while the nomoredata_on_close option is activated");
346 CRITICAL0("Closing a socket having more data in buffer. Option nomoredata_on_close disabled, so continuing.");
347 _gras_lastly_selected_socket=NULL;
350 /* FIXME: Issue an event when the socket is closed */
351 DEBUG1("sockets pointer before %p",sockets);
353 /* FIXME: Cannot get the dynar mutex, because it can be already locked */
354 // _xbt_dynar_foreach(sockets,cursor,sock_iter) {
355 for (cursor=0; cursor< xbt_dynar_length(sockets); cursor++) {
356 _xbt_dynar_cursor_get(sockets,&cursor,&sock_iter);
357 if (sock == sock_iter) {
358 DEBUG2("remove sock cursor %d dize %lu\n",cursor,xbt_dynar_length(sockets));
359 xbt_dynar_cursor_rm(sockets,&cursor);
360 if (sock->plugin->socket_close)
361 (* sock->plugin->socket_close)(sock);
363 /* free the memory */
365 free(sock->peer_name);
371 WARN1("Ignoring request to free an unknown socket (%p). Execution stack:",sock);
372 xbt_backtrace_display_current();
380 * Send a bunch of bytes from on socket
381 * (stable if we know the storage will keep as is until the next trp_flush)
384 gras_trp_send(gras_socket_t sd, char *data, long int size, int stable) {
385 xbt_assert0(sd->outgoing,"Socket not suited for data send");
386 (*sd->plugin->send)(sd,data,size,stable);
389 * gras_trp_chunk_recv:
391 * Receive a bunch of bytes from a socket
394 gras_trp_recv(gras_socket_t sd, char *data, long int size) {
395 xbt_assert0(sd->incoming,"Socket not suited for data receive");
396 (sd->plugin->recv)(sd,data,size);
402 * Make sure all pending communications are done
405 gras_trp_flush(gras_socket_t sd) {
406 if (sd->plugin->flush)
407 (sd->plugin->flush)(sd);
411 gras_trp_plugin_get_by_name(const char *name){
412 return xbt_dict_get(_gras_trp_plugins,name);
415 int gras_socket_my_port (gras_socket_t sock) {
418 int gras_socket_peer_port(gras_socket_t sock) {
419 return sock->peer_port;
421 char *gras_socket_peer_name(gras_socket_t sock) {
422 return sock->peer_name;
424 char *gras_socket_peer_proc(gras_socket_t sock) {
425 return sock->peer_proc;
428 void gras_socket_peer_proc_set(gras_socket_t sock,char*peer_proc) {
429 sock->peer_proc = peer_proc;
432 /** \brief Check if the provided socket is a measurement one (or a regular one) */
433 int gras_socket_is_meas(gras_socket_t sock) {
437 /** \brief Send a chunk of (random) data over a measurement socket
439 * @param peer measurement socket to use for the experiment
440 * @param timeout timeout (in seconds)
441 * @param msg_size size of each chunk sent over the socket (in bytes).
442 * @param msg_amount how many of these packets you want to send.
444 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
445 * each side of the socket should be paired.
447 * The exchanged data is zeroed to make sure it's initialized, but
448 * there is no way to control what is sent (ie, you cannot use these
449 * functions to exchange data out of band).
451 * @warning: in SimGrid version 3.1 and previous, the numerical arguments
452 * were the total amount of data to send and the msg_size. This
453 * was changed for the fool wanting to send more than MAXINT
454 * bytes in a fat pipe.
456 void gras_socket_meas_send(gras_socket_t peer,
457 unsigned int timeout,
458 unsigned long int msg_size,
459 unsigned long int msg_amount) {
461 unsigned long int sent_sofar;
466 chunk=xbt_malloc0(msg_size);
468 xbt_assert0(peer->meas,"Asked to send measurement data on a regular socket");
469 xbt_assert0(peer->outgoing,"Socket not suited for data send (was created with gras_socket_server(), not gras_socket_client())");
471 for (sent_sofar=0; sent_sofar < msg_amount; sent_sofar++) {
472 CDEBUG5(gras_trp_meas,"Sent %lu msgs of %lu (size of each: %ld) to %s:%d",
473 sent_sofar,msg_amount,msg_size,
474 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
475 (*peer->plugin->raw_send)(peer,chunk,msg_size);
477 CDEBUG5(gras_trp_meas,"Sent %lu msgs of %lu (size of each: %ld) to %s:%d",
478 sent_sofar,msg_amount,msg_size,
479 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
487 /** \brief Receive a chunk of data over a measurement socket
489 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
490 * each side of the socket should be paired.
492 * @warning: in SimGrid version 3.1 and previous, the numerical arguments
493 * were the total amount of data to send and the msg_size. This
494 * was changed for the fool wanting to send more than MAXINT
495 * bytes in a fat pipe.
497 void gras_socket_meas_recv(gras_socket_t peer,
498 unsigned int timeout,
499 unsigned long int msg_size,
500 unsigned long int msg_amount){
503 unsigned long int got_sofar;
508 chunk = xbt_malloc(msg_size);
510 xbt_assert0(peer->meas,
511 "Asked to receive measurement data on a regular socket");
512 xbt_assert0(peer->incoming,"Socket not suited for data receive");
514 for (got_sofar=0; got_sofar < msg_amount; got_sofar ++) {
515 CDEBUG5(gras_trp_meas,"Recvd %ld msgs of %lu (size of each: %ld) from %s:%d",
516 got_sofar,msg_amount,msg_size,
517 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
518 (peer->plugin->raw_recv)(peer,chunk,msg_size);
520 CDEBUG5(gras_trp_meas,"Recvd %ld msgs of %lu (size of each: %ld) from %s:%d",
521 got_sofar,msg_amount,msg_size,
522 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
530 * \brief Something similar to the good old accept system call.
532 * Make sure that there is someone speaking to the provided server socket.
533 * In RL, it does an accept(2) and return the result as last argument.
534 * In SG, as accepts are useless, it returns the provided argument as result.
535 * You should thus test whether (peer != accepted) before closing both of them.
537 * You should only call this on measurement sockets. It is automatically
538 * done for regular sockets, but you usually want more control about
539 * what's going on with measurement sockets.
541 gras_socket_t gras_socket_meas_accept(gras_socket_t peer){
544 xbt_assert0(peer->meas,
545 "No need to accept on non-measurement sockets (it's automatic)");
547 if (!peer->accepting) {
548 /* nothing to accept here (must be in SG) */
549 /* BUG: FIXME: this is BAD! it makes tricky to free the accepted socket*/
553 res = (peer->plugin->socket_accept)(peer);
554 res->meas = peer->meas;
555 CDEBUG1(gras_trp_meas,"meas_accepted onto %d",res->sd);
562 * Creating procdata for this module
564 static void *gras_trp_procdata_new(void) {
565 gras_trp_procdata_t res = xbt_new(s_gras_trp_procdata_t,1);
567 res->name = xbt_strdup("gras_trp");
569 res->sockets = xbt_dynar_new_sync(sizeof(gras_socket_t*), NULL);
576 * Freeing procdata for this module
578 static void gras_trp_procdata_free(void *data) {
579 gras_trp_procdata_t res = (gras_trp_procdata_t)data;
581 xbt_dynar_free(&( res->sockets ));
586 void gras_trp_socketset_dump(const char *name) {
587 gras_trp_procdata_t procdata =
588 (gras_trp_procdata_t)gras_libdata_by_id(gras_trp_libdata_id);
593 INFO1("** Dump the socket set %s",name);
594 xbt_dynar_foreach(procdata->sockets, it, s) {
595 INFO4(" %p -> %s:%d %s",
596 s,gras_socket_peer_name(s),gras_socket_peer_port(s),
597 s->valid?"(valid)":"(peer dead)");
599 INFO1("** End of socket set %s",name);
603 * Module registration
605 int gras_trp_libdata_id;
606 void gras_trp_register() {
607 gras_trp_libdata_id = gras_procdata_add("gras_trp",gras_trp_procdata_new, gras_trp_procdata_free);
610 int gras_os_myport(void) {
611 return ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport;