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 xbt_dynar_t sockets = ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
101 gras_socket_t sock_iter;
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 /* Close all the sockets */
119 xbt_dynar_foreach(sockets,cursor,sock_iter) {
120 VERB1("Closing the socket %p left open on exit. Maybe a socket leak?",
122 gras_socket_close(sock_iter);
125 /* Delete the plugins */
126 xbt_dict_free(&_gras_trp_plugins);
131 void gras_trp_plugin_free(void *p) {
132 gras_trp_plugin_t plug = p;
137 } else if (plug->data) {
138 DEBUG1("Plugin %s lacks exit(). Free data anyway.",plug->name);
149 * gras_trp_socket_new:
151 * Malloc a new socket, and initialize it with defaults
153 void gras_trp_socket_new(int incoming,
154 gras_socket_t *dst) {
156 gras_socket_t sock=xbt_new0(s_gras_socket_t,1);
158 VERB1("Create a new socket (%p)", (void*)sock);
162 sock->incoming = incoming ? 1:0;
163 sock->outgoing = incoming ? 0:1;
164 sock->accepting = incoming ? 1:0;
172 sock->peer_port = -1;
173 sock->peer_name = NULL;
174 sock->peer_proc = NULL;
177 sock->bufdata = NULL;
181 xbt_dynar_push(((gras_trp_procdata_t)
182 gras_libdata_by_id(gras_trp_libdata_id))->sockets,dst);
187 * @brief Opens a server socket and makes it ready to be listened to.
188 * @param port: port on which you want to listen
189 * @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)
190 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
192 * In real life, you'll get a TCP socket.
195 gras_socket_server_ext(unsigned short port,
197 unsigned long int buf_size,
201 gras_trp_plugin_t trp;
204 DEBUG2("Create a server socket from plugin %s on port %d",
205 gras_if_RL() ? "tcp" : "sg",
207 trp = gras_trp_plugin_get_by_name(gras_if_SG() ? "sg":"tcp");
209 /* defaults settings */
210 gras_trp_socket_new(1,&sock);
213 sock->buf_size = buf_size>0 ? buf_size : 32*1024;
214 sock->meas = measurement;
216 /* Call plugin socket creation function */
217 DEBUG1("Prepare socket with plugin (fct=%p)",trp->socket_server);
219 trp->socket_server(trp, sock);
220 DEBUG3("in=%c out=%c accept=%c",
221 sock->incoming?'y':'n',
222 sock->outgoing?'y':'n',
223 sock->accepting?'y':'n');
226 gras_socket_t sock_iter;
227 xbt_dynar_t socks = ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
228 xbt_dynar_foreach(socks, cursor, sock_iter) {
230 xbt_dynar_cursor_rm(socks,&cursor);
237 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport = port;
241 * @brief Opens a server socket on any port in the given range
243 * @param minport: first port we will try
244 * @param maxport: last port we will try
245 * @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)
246 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
248 * If none of the provided ports works, raises the exception got when trying the last possibility
251 gras_socket_server_range(unsigned short minport, unsigned short maxport,
252 unsigned long int buf_size, int measurement) {
255 gras_socket_t res=NULL;
258 for (port=minport; port<maxport;port ++) {
260 res=gras_socket_server_ext(port,buf_size,measurement);
273 * @brief Opens a client socket to a remote host.
274 * @param host: who you want to connect to
275 * @param port: where you want to connect to on this host
276 * @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)
277 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
279 * In real life, you'll get a TCP socket.
282 gras_socket_client_ext(const char *host,
285 unsigned long int buf_size,
289 gras_trp_plugin_t trp;
292 trp = gras_trp_plugin_get_by_name(gras_if_SG() ? "sg":"tcp");
294 DEBUG1("Create a client socket from plugin %s",gras_if_RL() ? "tcp" : "sg");
295 /* defaults settings */
296 gras_trp_socket_new(0,&sock);
298 sock->peer_port = port;
299 sock->peer_name = (char*)strdup(host?host:"localhost");
300 sock->buf_size = buf_size>0 ? buf_size: 32*1024;
301 sock->meas = measurement;
303 /* plugin-specific */
305 (*trp->socket_client)(trp, sock);
306 DEBUG3("in=%c out=%c accept=%c",
307 sock->incoming?'y':'n',
308 sock->outgoing?'y':'n',
309 sock->accepting?'y':'n');
319 * gras_socket_server:
321 * Opens a server socket and make it ready to be listened to.
322 * In real life, you'll get a TCP socket.
325 gras_socket_server(unsigned short port) {
326 return gras_socket_server_ext(port,32*1024,0);
329 /** @brief Opens a client socket to a remote host */
331 gras_socket_client(const char *host,
332 unsigned short port) {
333 return gras_socket_client_ext(host,port,0,0);
336 /** @brief Opens a client socket to a remote host specified as '\a host:\a port' */
338 gras_socket_client_from_string(const char *host) {
339 xbt_peer_t p = xbt_peer_from_string(host);
340 gras_socket_t res = gras_socket_client_ext(p->name,p->port,0,0);
345 /** \brief Close socket */
346 void gras_socket_close(gras_socket_t sock) {
347 xbt_dynar_t sockets = ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
348 gras_socket_t sock_iter;
352 VERB1("Close %p",sock);
353 if (sock == _gras_lastly_selected_socket) {
354 xbt_assert0(!gras_opt_trp_nomoredata_on_close || !sock->moredata,
355 "Closing a socket having more data in buffer while the nomoredata_on_close option is activated");
358 CRITICAL0("Closing a socket having more data in buffer. Option nomoredata_on_close disabled, so continuing.");
359 _gras_lastly_selected_socket=NULL;
362 /* FIXME: Issue an event when the socket is closed */
364 xbt_dynar_foreach(sockets,cursor,sock_iter) {
365 if (sock == sock_iter) {
366 xbt_dynar_cursor_rm(sockets,&cursor);
367 if (sock->plugin->socket_close)
368 (* sock->plugin->socket_close)(sock);
370 /* free the memory */
372 free(sock->peer_name);
378 WARN1("Ignoring request to free an unknown socket (%p). Execution stack:",sock);
379 xbt_backtrace_display();
387 * Send a bunch of bytes from on socket
388 * (stable if we know the storage will keep as is until the next trp_flush)
391 gras_trp_send(gras_socket_t sd, char *data, long int size, int stable) {
392 xbt_assert0(sd->outgoing,"Socket not suited for data send");
393 (*sd->plugin->send)(sd,data,size,stable);
396 * gras_trp_chunk_recv:
398 * Receive a bunch of bytes from a socket
401 gras_trp_recv(gras_socket_t sd, char *data, long int size) {
402 xbt_assert0(sd->incoming,"Socket not suited for data receive");
403 (sd->plugin->recv)(sd,data,size);
409 * Make sure all pending communications are done
412 gras_trp_flush(gras_socket_t sd) {
413 if (sd->plugin->flush)
414 (sd->plugin->flush)(sd);
418 gras_trp_plugin_get_by_name(const char *name){
419 return xbt_dict_get(_gras_trp_plugins,name);
422 int gras_socket_my_port (gras_socket_t sock) {
425 int gras_socket_peer_port(gras_socket_t sock) {
426 return sock->peer_port;
428 char *gras_socket_peer_name(gras_socket_t sock) {
429 return sock->peer_name;
431 char *gras_socket_peer_proc(gras_socket_t sock) {
432 return sock->peer_proc;
435 void gras_socket_peer_proc_set(gras_socket_t sock,char*peer_proc) {
436 sock->peer_proc = peer_proc;
439 /** \brief Check if the provided socket is a measurement one (or a regular one) */
440 int gras_socket_is_meas(gras_socket_t sock) {
444 /** \brief Send a chunk of (random) data over a measurement socket
446 * @param peer measurement socket to use for the experiment
447 * @param timeout timeout (in seconds)
448 * @param exp_size total amount of data to send (in bytes).
449 * @param msg_size size of each chunk sent over the socket (in bytes).
451 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
452 * each side of the socket should be paired.
454 * The exchanged data is zeroed to make sure it's initialized, but
455 * there is no way to control what is sent (ie, you cannot use these
456 * functions to exchange data out of band).
458 void gras_socket_meas_send(gras_socket_t peer,
459 unsigned int timeout,
460 unsigned long int exp_size,
461 unsigned long int msg_size) {
463 unsigned long int exp_sofar;
464 unsigned long int chunk_size = 0;
469 chunk=xbt_malloc0(msg_size);
471 xbt_assert0(peer->meas,"Asked to send measurement data on a regular socket");
472 xbt_assert0(peer->outgoing,"Socket not suited for data send (was created with gras_socket_server(), not gras_socket_client())");
474 for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += chunk_size) {
475 chunk_size = exp_sofar + msg_size > exp_size ?
476 exp_size - exp_sofar : msg_size;
477 CDEBUG6(gras_trp_meas,"Sent %lu of %lu (msg_size=%ld) to %s:%d, sending %lu",
478 exp_sofar,exp_size,msg_size,
479 gras_socket_peer_name(peer), gras_socket_peer_port(peer),
481 (*peer->plugin->raw_send)(peer,chunk,chunk_size);
483 CDEBUG5(gras_trp_meas,"Sent %lu of %lu (msg_size=%ld) to %s:%d",
484 exp_sofar,exp_size,msg_size,
485 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
493 /** \brief Receive a chunk of data over a measurement socket
495 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
496 * each side of the socket should be paired.
498 void gras_socket_meas_recv(gras_socket_t peer,
499 unsigned int timeout,
500 unsigned long int exp_size,
501 unsigned long int msg_size){
504 unsigned long int exp_sofar;
505 unsigned long int chunk_size = 0;
510 chunk = xbt_malloc(msg_size);
512 xbt_assert0(peer->meas,
513 "Asked to receive measurement data on a regular socket");
514 xbt_assert0(peer->incoming,"Socket not suited for data receive");
516 for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += chunk_size) {
517 chunk_size = exp_sofar + msg_size > exp_size ?
518 exp_size - exp_sofar : msg_size;
519 CDEBUG6(gras_trp_meas,"Recvd %ld of %lu (msg_size=%ld) from %s:%d, receiving %lu",
520 exp_sofar,exp_size,msg_size,
521 gras_socket_peer_name(peer), gras_socket_peer_port(peer),
523 (peer->plugin->raw_recv)(peer,chunk,chunk_size);
525 CDEBUG5(gras_trp_meas,"Recvd %ld of %lu (msg_size=%ld) from %s:%d",
526 exp_sofar,exp_size,msg_size,
527 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
535 * \brief Something similar to the good old accept system call.
537 * Make sure that there is someone speaking to the provided server socket.
538 * In RL, it does an accept(2) and return the result as last argument.
539 * In SG, as accepts are useless, it returns the provided argument as result.
540 * You should thus test whether (peer != accepted) before closing both of them.
542 * You should only call this on measurement sockets. It is automatically
543 * done for regular sockets, but you usually want more control about
544 * what's going on with measurement sockets.
546 gras_socket_t gras_socket_meas_accept(gras_socket_t peer){
549 xbt_assert0(peer->meas,
550 "No need to accept on non-measurement sockets (it's automatic)");
552 if (!peer->accepting) {
553 /* nothing to accept here (must be in SG) */
554 /* BUG: FIXME: this is BAD! it makes tricky to free the accepted socket*/
558 res = (peer->plugin->socket_accept)(peer);
559 res->meas = peer->meas;
560 CDEBUG1(gras_trp_meas,"meas_accepted onto %d",res->sd);
567 * Creating procdata for this module
569 static void *gras_trp_procdata_new() {
570 gras_trp_procdata_t res = xbt_new(s_gras_trp_procdata_t,1);
572 res->name = xbt_strdup("gras_trp");
574 res->sockets = xbt_dynar_new(sizeof(gras_socket_t*), NULL);
581 * Freeing procdata for this module
583 static void gras_trp_procdata_free(void *data) {
584 gras_trp_procdata_t res = (gras_trp_procdata_t)data;
586 xbt_dynar_free(&( res->sockets ));
591 void gras_trp_socketset_dump(const char *name) {
592 gras_trp_procdata_t procdata =
593 (gras_trp_procdata_t)gras_libdata_by_id(gras_trp_libdata_id);
598 INFO1("** Dump the socket set %s",name);
599 xbt_dynar_foreach(procdata->sockets, it, s) {
600 INFO4(" %p -> %s:%d %s",
601 s,gras_socket_peer_name(s),gras_socket_peer_port(s),
602 s->valid?"(valid)":"(peer dead)");
604 INFO1("** End of socket set %s",name);
608 * Module registration
610 int gras_trp_libdata_id;
611 void gras_trp_register() {
612 gras_trp_libdata_id = gras_procdata_add("gras_trp",gras_trp_procdata_new, gras_trp_procdata_free);
615 int gras_os_myport(void) {
616 return ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport;