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 #include "gras/Transport/transport_private.h"
15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_trp,gras,"Conveying bytes over the network");
16 XBT_LOG_NEW_SUBCATEGORY(gras_trp_meas,gras_trp,"Conveying bytes over the network without formating for perf measurements");
17 static short int _gras_trp_started = 0;
19 static xbt_dict_t _gras_trp_plugins; /* All registered plugins */
20 static void gras_trp_plugin_free(void *p); /* free one of the plugins */
23 gras_trp_plugin_new(const char *name, gras_trp_setup_t setup) {
26 gras_trp_plugin_t plug = xbt_new0(s_gras_trp_plugin_t, 1);
28 DEBUG1("Create plugin %s",name);
30 plug->name=xbt_strdup(name);
35 if (e.category == mismatch_error) {
36 /* SG plugin raise mismatch when in RL mode (and vice versa) */
47 xbt_dict_set(_gras_trp_plugins, name, plug, gras_trp_plugin_free);
50 void gras_trp_init(void){
51 if (!_gras_trp_started) {
52 /* make room for all plugins */
53 _gras_trp_plugins=xbt_dict_new();
55 #ifdef HAVE_WINSOCK2_H
56 /* initialize the windows mechanism */
58 WORD wVersionRequested;
61 wVersionRequested = MAKEWORD( 2, 0 );
62 xbt_assert0(WSAStartup( wVersionRequested, &wsaData ) == 0,
63 "Cannot find a usable WinSock DLL");
65 /* Confirm that the WinSock DLL supports 2.0.*/
66 /* Note that if the DLL supports versions greater */
67 /* than 2.0 in addition to 2.0, it will still return */
68 /* 2.0 in wVersion since that is the version we */
71 xbt_assert0(LOBYTE( wsaData.wVersion ) == 2 &&
72 HIBYTE( wsaData.wVersion ) == 0,
73 "Cannot find a usable WinSock DLL");
74 INFO0("Found and initialized winsock2");
75 } /* The WinSock DLL is acceptable. Proceed. */
78 xbt_assert0(WSAStartup( 0x0101, &wsaData ) == 0,
79 "Cannot find a usable WinSock DLL");
80 INFO0("Found and initialized winsock");
85 gras_trp_plugin_new("file",gras_trp_file_setup);
86 gras_trp_plugin_new("sg",gras_trp_sg_setup);
87 gras_trp_plugin_new("tcp", gras_trp_tcp_setup);
95 xbt_dynar_t sockets = ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
96 gras_socket_t sock_iter;
99 if (_gras_trp_started == 0) {
103 if ( --_gras_trp_started == 0 ) {
104 #ifdef HAVE_WINSOCK_H
105 if ( WSACleanup() == SOCKET_ERROR ) {
106 if ( WSAGetLastError() == WSAEINPROGRESS ) {
107 WSACancelBlockingCall();
113 /* Close all the sockets */
114 xbt_dynar_foreach(sockets,cursor,sock_iter) {
115 VERB1("Closing the socket %p left open on exit. Maybe a socket leak?",
117 gras_socket_close(sock_iter);
120 /* Delete the plugins */
121 xbt_dict_free(&_gras_trp_plugins);
126 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,
149 gras_socket_t *dst) {
151 gras_socket_t sock=xbt_new0(s_gras_socket_t,1);
153 DEBUG1("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;
164 sock->peer_port = -1;
165 sock->peer_name = NULL;
166 sock->peer_proc = NULL;
169 sock->bufdata = NULL;
173 xbt_dynar_push(((gras_trp_procdata_t)
174 gras_libdata_by_id(gras_trp_libdata_id))->sockets,dst);
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,
189 unsigned long int buf_size,
193 gras_trp_plugin_t trp;
196 DEBUG2("Create a server socket from plugin %s on port %d",
197 gras_if_RL() ? "tcp" : "sg",
199 trp = gras_trp_plugin_get_by_name(gras_if_SG() ? "sg":"tcp");
201 /* defaults settings */
202 gras_trp_socket_new(1,&sock);
205 sock->buf_size = buf_size>0 ? buf_size : 32*1024;
206 sock->meas = measurement;
208 /* Call plugin socket creation function */
209 DEBUG1("Prepare socket with plugin (fct=%p)",trp->socket_server);
211 trp->socket_server(trp, sock);
212 DEBUG3("in=%c out=%c accept=%c",
213 sock->incoming?'y':'n',
214 sock->outgoing?'y':'n',
215 sock->accepting?'y':'n');
218 gras_socket_t sock_iter;
219 xbt_dynar_t socks = ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
220 xbt_dynar_foreach(socks, cursor, sock_iter) {
222 xbt_dynar_cursor_rm(socks,&cursor);
228 ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->myport = port;
232 * @brief Opens a server socket on any port in the given range
234 * @param minport: first port we will try
235 * @param maxport: last port we will try
236 * @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)
237 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
239 * If none of the provided ports works, raises the exception got when trying the last possibility
242 gras_socket_server_range(unsigned short minport, unsigned short maxport,
243 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);
263 * @brief Opens a client socket to a remote host.
264 * @param host: who you want to connect to
265 * @param port: where you want to connect to on this host
266 * @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)
267 * @param measurement: whether this socket is meant to convey measurement (if you don't know, use 0 to exchange regular messages)
269 * In real life, you'll get a TCP socket.
272 gras_socket_client_ext(const char *host,
275 unsigned long int buf_size,
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',
299 sock->accepting?'y':'n');
309 * gras_socket_server:
311 * Opens a server socket and make it ready to be listened to.
312 * In real life, you'll get a TCP socket.
315 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 */
321 gras_socket_client(const char *host,
322 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 '<host>:<port>' */
328 gras_socket_client_from_string(const char *host) {
329 xbt_host_t h = xbt_host_from_string(host);
330 gras_socket_t res = gras_socket_client_ext(h->name,h->port,0,0);
335 /** \brief Close socket */
336 void gras_socket_close(gras_socket_t sock) {
337 xbt_dynar_t sockets = ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
338 gras_socket_t sock_iter;
342 /* FIXME: Issue an event when the socket is closed */
344 xbt_dynar_foreach(sockets,cursor,sock_iter) {
345 if (sock == sock_iter) {
346 xbt_dynar_cursor_rm(sockets,&cursor);
347 if (sock->plugin->socket_close)
348 (* sock->plugin->socket_close)(sock);
350 /* free the memory */
352 free(sock->peer_name);
358 WARN1("Ignoring request to free an unknown socket (%p)",sock);
366 * Send a bunch of bytes from on socket
367 * (stable if we know the storage will keep as is until the next trp_flush)
370 gras_trp_send(gras_socket_t sd, char *data, long int size, int stable) {
371 xbt_assert0(sd->outgoing,"Socket not suited for data send");
372 (*sd->plugin->send)(sd,data,size,stable);
375 * gras_trp_chunk_recv:
377 * Receive a bunch of bytes from a socket
380 gras_trp_recv(gras_socket_t sd, char *data, long int size) {
381 xbt_assert0(sd->incoming,"Socket not suited for data receive");
382 (sd->plugin->recv)(sd,data,size);
388 * Make sure all pending communications are done
391 gras_trp_flush(gras_socket_t sd) {
392 if (sd->plugin->flush)
393 (sd->plugin->flush)(sd);
397 gras_trp_plugin_get_by_name(const char *name){
398 return xbt_dict_get(_gras_trp_plugins,name);
401 int gras_socket_my_port (gras_socket_t sock) {
404 int gras_socket_peer_port(gras_socket_t sock) {
405 return sock->peer_port;
407 char *gras_socket_peer_name(gras_socket_t sock) {
408 return sock->peer_name;
410 char *gras_socket_peer_proc(gras_socket_t sock) {
411 return sock->peer_proc;
414 void gras_socket_peer_proc_set(gras_socket_t sock,char*peer_proc) {
415 sock->peer_proc = peer_proc;
418 /** \brief Check if the provided socket is a measurement one (or a regular one) */
419 int gras_socket_is_meas(gras_socket_t sock) {
423 /** \brief Send a chunk of (random) data over a measurement socket
425 * @param peer measurement socket to use for the experiment
426 * @param timeout timeout (in seconds)
427 * @param exp_size total amount of data to send (in bytes).
428 * @param msg_size size of each chunk sent over the socket (in bytes).
430 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
431 * each side of the socket should be paired.
433 * The exchanged data is zeroed to make sure it's initialized, but
434 * there is no way to control what is sent (ie, you cannot use these
435 * functions to exchange data out of band).
437 void gras_socket_meas_send(gras_socket_t peer,
438 unsigned int timeout,
439 unsigned long int exp_size,
440 unsigned long int msg_size) {
442 unsigned long int exp_sofar;
447 chunk=xbt_malloc0(msg_size);
449 xbt_assert0(peer->meas,"Asked to send measurement data on a regular socket");
450 xbt_assert0(peer->outgoing,"Socket not suited for data send (was created with gras_socket_server(), not gras_socket_client())");
452 for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += msg_size) {
453 CDEBUG5(gras_trp_meas,"Sent %lu of %lu (msg_size=%ld) to %s:%d",
454 exp_sofar,exp_size,msg_size,
455 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
456 (*peer->plugin->raw_send)(peer,chunk,msg_size);
458 CDEBUG5(gras_trp_meas,"Sent %lu of %lu (msg_size=%ld) to %s:%d",
459 exp_sofar,exp_size,msg_size,
460 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
468 /** \brief Receive a chunk of data over a measurement socket
470 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
471 * each side of the socket should be paired.
473 void gras_socket_meas_recv(gras_socket_t peer,
474 unsigned int timeout,
475 unsigned long int exp_size,
476 unsigned long int msg_size){
479 unsigned long int exp_sofar;
484 chunk = xbt_malloc(msg_size);
486 xbt_assert0(peer->meas,
487 "Asked to receive measurement data on a regular socket");
488 xbt_assert0(peer->incoming,"Socket not suited for data receive");
490 for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += msg_size) {
491 CDEBUG5(gras_trp_meas,"Recvd %ld of %lu (msg_size=%ld) from %s:%d",
492 exp_sofar,exp_size,msg_size,
493 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
494 (peer->plugin->raw_recv)(peer,chunk,msg_size);
496 CDEBUG5(gras_trp_meas,"Recvd %ld of %lu (msg_size=%ld) from %s:%d",
497 exp_sofar,exp_size,msg_size,
498 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
506 * \brief Something similar to the good old accept system call.
508 * Make sure that there is someone speaking to the provided server socket.
509 * In RL, it does an accept(2) and return the result as last argument.
510 * In SG, as accepts are useless, it returns the provided argument as result.
511 * You should thus test whether (peer != accepted) before closing both of them.
513 * You should only call this on measurement sockets. It is automatically
514 * done for regular sockets, but you usually want more control about
515 * what's going on with measurement sockets.
517 gras_socket_t gras_socket_meas_accept(gras_socket_t peer){
520 xbt_assert0(peer->meas,
521 "No need to accept on non-measurement sockets (it's automatic)");
523 if (!peer->accepting) {
524 /* nothing to accept here (must be in SG) */
525 /* BUG: FIXME: this is BAD! it makes tricky to free the accepted socket*/
529 res = (peer->plugin->socket_accept)(peer);
530 res->meas = peer->meas;
531 CDEBUG1(gras_trp_meas,"meas_accepted onto %d",res->sd);
538 * Creating procdata for this module
540 static void *gras_trp_procdata_new() {
541 gras_trp_procdata_t res = xbt_new(s_gras_trp_procdata_t,1);
543 res->name = xbt_strdup("gras_trp");
545 res->sockets = xbt_dynar_new(sizeof(gras_socket_t*), NULL);
552 * Freeing procdata for this module
554 static void gras_trp_procdata_free(void *data) {
555 gras_trp_procdata_t res = (gras_trp_procdata_t)data;
557 xbt_dynar_free(&( res->sockets ));
563 * Module registration
565 int gras_trp_libdata_id;
566 void gras_trp_register() {
567 gras_trp_libdata_id = gras_procdata_add("gras_trp",gras_trp_procdata_new, gras_trp_procdata_free);