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. */
12 #include "gras/Transport/transport_private.h"
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(transport,gras,"Conveying bytes over the network");
15 XBT_LOG_NEW_SUBCATEGORY(trp_meas,transport,"Conveying bytes over the network without formating for perf measurements");
16 static short int _gras_trp_started = 0;
18 static xbt_dict_t _gras_trp_plugins; /* All registered plugins */
19 static void gras_trp_plugin_free(void *p); /* free one of the plugins */
22 gras_trp_plugin_new(const char *name, gras_trp_setup_t setup) {
25 gras_trp_plugin_t plug = xbt_new0(s_gras_trp_plugin_t, 1);
27 DEBUG1("Create plugin %s",name);
29 plug->name=xbt_strdup(name);
34 if (e.category == mismatch_error) {
35 /* SG plugin raise mismatch when in RL mode (and vice versa) */
46 xbt_dict_set(_gras_trp_plugins, name, plug, gras_trp_plugin_free);
49 void gras_trp_init(void){
50 if (!_gras_trp_started) {
51 /* make room for all plugins */
52 _gras_trp_plugins=xbt_dict_new();
54 #ifdef HAVE_WINSOCK2_H
55 /* initialize the windows mechanism */
57 WORD wVersionRequested;
60 wVersionRequested = MAKEWORD( 2, 0 );
61 xbt_assert0(WSAStartup( wVersionRequested, &wsaData ) == 0,
62 "Cannot find a usable WinSock DLL");
64 /* Confirm that the WinSock DLL supports 2.0.*/
65 /* Note that if the DLL supports versions greater */
66 /* than 2.0 in addition to 2.0, it will still return */
67 /* 2.0 in wVersion since that is the version we */
70 xbt_assert0(LOBYTE( wsaData.wVersion ) == 2 &&
71 HIBYTE( wsaData.wVersion ) == 0,
72 "Cannot find a usable WinSock DLL");
73 INFO0("Found and initialized winsock2");
74 } /* The WinSock DLL is acceptable. Proceed. */
77 xbt_assert0(WSAStartup( 0x0101, &wsaData ) == 0,
78 "Cannot find a usable WinSock DLL");
79 INFO0("Found and initialized winsock");
84 gras_trp_plugin_new("file",gras_trp_file_setup);
85 gras_trp_plugin_new("sg",gras_trp_sg_setup);
86 gras_trp_plugin_new("tcp", gras_trp_tcp_setup);
94 xbt_dynar_t sockets = ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
95 gras_socket_t sock_iter;
98 if (_gras_trp_started == 0) {
102 if ( --_gras_trp_started == 0 ) {
103 #ifdef HAVE_WINSOCK_H
104 if ( WSACleanup() == SOCKET_ERROR ) {
105 if ( WSAGetLastError() == WSAEINPROGRESS ) {
106 WSACancelBlockingCall();
112 /* Close all the sockets */
113 xbt_dynar_foreach(sockets,cursor,sock_iter) {
114 VERB1("Closing the socket %p left open on exit. Maybe a socket leak?",
116 gras_socket_close(sock_iter);
119 /* Delete the plugins */
120 xbt_dict_free(&_gras_trp_plugins);
125 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,
148 gras_socket_t *dst) {
150 gras_socket_t sock=xbt_new0(s_gras_socket_t,1);
152 DEBUG1("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;
163 sock->peer_port = -1;
164 sock->peer_name = NULL;
167 sock->bufdata = NULL;
171 xbt_dynar_push(((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets,dst);
177 * gras_socket_server_ext:
179 * Opens a server socket and make it ready to be listened to.
180 * In real life, you'll get a TCP socket.
183 gras_socket_server_ext(unsigned short port,
185 unsigned long int bufSize,
189 gras_trp_plugin_t trp;
192 DEBUG2("Create a server socket from plugin %s on port %d",
193 gras_if_RL() ? "tcp" : "sg",
195 trp = gras_trp_plugin_get_by_name(gras_if_SG() ? "sg":(measurement?"tcp":"buf"));
197 /* defaults settings */
198 gras_trp_socket_new(1,&sock);
201 sock->bufSize = bufSize;
202 sock->meas = measurement;
204 /* Call plugin socket creation function */
205 DEBUG1("Prepare socket with plugin (fct=%p)",trp->socket_server);
207 trp->socket_server(trp, sock);
208 DEBUG3("in=%c out=%c accept=%c",
209 sock->incoming?'y':'n',
210 sock->outgoing?'y':'n',
211 sock->accepting?'y':'n');
221 * gras_socket_client_ext:
223 * Opens a client socket to a remote host.
224 * In real life, you'll get a TCP socket.
227 gras_socket_client_ext(const char *host,
230 unsigned long int bufSize,
234 gras_trp_plugin_t trp;
237 trp = gras_trp_plugin_get_by_name(gras_if_SG() ? "sg":(measurement?"tcp":"buf"));
239 DEBUG1("Create a client socket from plugin %s",gras_if_RL() ? "tcp" : "sg");
240 /* defaults settings */
241 gras_trp_socket_new(0,&sock);
243 sock->peer_port = port;
244 sock->peer_name = (char*)strdup(host?host:"localhost");
245 sock->bufSize = bufSize;
246 sock->meas = measurement;
248 /* plugin-specific */
250 (*trp->socket_client)(trp, sock);
251 DEBUG3("in=%c out=%c accept=%c",
252 sock->incoming?'y':'n',
253 sock->outgoing?'y':'n',
254 sock->accepting?'y':'n');
264 * gras_socket_server:
266 * Opens a server socket and make it ready to be listened to.
267 * In real life, you'll get a TCP socket.
270 gras_socket_server(unsigned short port) {
271 return gras_socket_server_ext(port,32,0);
275 * gras_socket_client:
277 * Opens a client socket to a remote host.
278 * In real life, you'll get a TCP socket.
281 gras_socket_client(const char *host,
282 unsigned short port) {
283 return gras_socket_client_ext(host,port,32,0);
287 void gras_socket_close(gras_socket_t sock) {
288 xbt_dynar_t sockets = ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;
289 gras_socket_t sock_iter;
293 /* FIXME: Issue an event when the socket is closed */
295 xbt_dynar_foreach(sockets,cursor,sock_iter) {
296 if (sock == sock_iter) {
297 xbt_dynar_cursor_rm(sockets,&cursor);
298 if (sock->plugin->socket_close)
299 (* sock->plugin->socket_close)(sock);
301 /* free the memory */
303 free(sock->peer_name);
309 WARN1("Ignoring request to free an unknown socket (%p)",sock);
317 * Send a bunch of bytes from on socket
318 * (stable if we know the storage will keep as is until the next trp_flush)
321 gras_trp_send(gras_socket_t sd, char *data, long int size, int stable) {
322 xbt_assert0(sd->outgoing,"Socket not suited for data send");
323 (*sd->plugin->send)(sd,data,size,stable);
326 * gras_trp_chunk_recv:
328 * Receive a bunch of bytes from a socket
331 gras_trp_recv(gras_socket_t sd, char *data, long int size) {
332 xbt_assert0(sd->incoming,"Socket not suited for data receive");
333 (sd->plugin->recv)(sd,data,size);
339 * Make sure all pending communications are done
342 gras_trp_flush(gras_socket_t sd) {
343 if (sd->plugin->flush)
344 (sd->plugin->flush)(sd);
348 gras_trp_plugin_get_by_name(const char *name){
349 return xbt_dict_get(_gras_trp_plugins,name);
352 int gras_socket_my_port (gras_socket_t sock) {
355 int gras_socket_peer_port(gras_socket_t sock) {
356 return sock->peer_port;
358 char *gras_socket_peer_name(gras_socket_t sock) {
359 return sock->peer_name;
362 /** \brief Check if the provided socket is a measurement one (or a regular one) */
363 int gras_socket_is_meas(gras_socket_t sock) {
367 /** \brief Send a chunk of (random) data over a measurement socket
369 * @param peer measurement socket to use for the experiment
370 * @param timeout timeout (in seconds)
371 * @param exp_size total amount of data to send (in bytes).
372 * @param msg_size size of each chunk sent over the socket (in bytes).
374 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
375 * each side of the socket should be paired.
377 * The exchanged data is zeroed to make sure it's initialized, but
378 * there is no way to control what is sent (ie, you cannot use these
379 * functions to exchange data out of band).
381 void gras_socket_meas_send(gras_socket_t peer,
382 unsigned int timeout,
383 unsigned long int exp_size,
384 unsigned long int msg_size) {
385 char *chunk = xbt_malloc0(msg_size);
386 unsigned long int exp_sofar;
390 xbt_assert0(peer->meas,"Asked to send measurement data on a regular socket");
391 xbt_assert0(peer->outgoing,"Socket not suited for data send");
393 for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += msg_size) {
394 CDEBUG5(trp_meas,"Sent %lu of %lu (msg_size=%ld) to %s:%d",
395 exp_sofar,exp_size,msg_size,
396 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
397 (*peer->plugin->raw_send)(peer,chunk,msg_size);
399 CDEBUG5(trp_meas,"Sent %lu of %lu (msg_size=%ld) to %s:%d",
400 exp_sofar,exp_size,msg_size,
401 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
408 /** \brief Receive a chunk of data over a measurement socket
410 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
411 * each side of the socket should be paired.
413 void gras_socket_meas_recv(gras_socket_t peer,
414 unsigned int timeout,
415 unsigned long int exp_size,
416 unsigned long int msg_size){
418 char *chunk = xbt_malloc(msg_size);
419 unsigned long int exp_sofar;
423 xbt_assert0(peer->meas,
424 "Asked to receive measurement data on a regular socket");
425 xbt_assert0(peer->incoming,"Socket not suited for data receive");
427 for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += msg_size) {
428 CDEBUG5(trp_meas,"Recvd %ld of %lu (msg_size=%ld) from %s:%d",
429 exp_sofar,exp_size,msg_size,
430 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
431 (peer->plugin->raw_recv)(peer,chunk,msg_size);
433 CDEBUG5(trp_meas,"Recvd %ld of %lu (msg_size=%ld) from %s:%d",
434 exp_sofar,exp_size,msg_size,
435 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
442 * \brief Something similar to the good old accept system call.
444 * Make sure that there is someone speaking to the provided server socket.
445 * In RL, it does an accept(2) and return the result as last argument.
446 * In SG, as accepts are useless, it returns the provided argument as result.
447 * You should thus test whether (peer != accepted) before closing both of them.
449 * You should only call this on measurement sockets. It is automatically
450 * done for regular sockets, but you usually want more control about
451 * what's going on with measurement sockets.
453 gras_socket_t gras_socket_meas_accept(gras_socket_t peer){
456 xbt_assert0(peer->meas,
457 "No need to accept on non-measurement sockets (it's automatic)");
459 if (!peer->accepting) {
460 /* nothing to accept here */
464 res = (peer->plugin->socket_accept)(peer);
465 res->meas = peer->meas;
466 CDEBUG1(trp_meas,"meas_accepted onto %d",res->sd);
473 * Creating procdata for this module
475 static void *gras_trp_procdata_new() {
476 gras_trp_procdata_t res = xbt_new(s_gras_trp_procdata_t,1);
478 res->name = xbt_strdup("gras_trp");
480 res->sockets = xbt_dynar_new(sizeof(gras_socket_t*), NULL);
486 * Freeing procdata for this module
488 static void gras_trp_procdata_free(void *data) {
489 gras_trp_procdata_t res = (gras_trp_procdata_t)data;
491 xbt_dynar_free(&( res->sockets ));
496 * Module registration
498 int gras_trp_libdata_id;
499 void gras_trp_register() {
500 gras_trp_libdata_id = gras_procdata_add("gras_trp",gras_trp_procdata_new, gras_trp_procdata_free);