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);
87 /* buf is composed, so it must come after the others */
88 gras_trp_plugin_new("buf", gras_trp_buf_setup);
96 xbt_dynar_t sockets = gras_socketset_get();
97 gras_socket_t sock_iter;
100 if (_gras_trp_started == 0) {
104 if ( --_gras_trp_started == 0 ) {
105 #ifdef HAVE_WINSOCK_H
106 if ( WSACleanup() == SOCKET_ERROR ) {
107 if ( WSAGetLastError() == WSAEINPROGRESS ) {
108 WSACancelBlockingCall();
114 /* Close all the sockets */
115 xbt_dynar_foreach(sockets,cursor,sock_iter) {
116 VERB1("Closing the socket %p left open on exit. Maybe a socket leak?",
118 gras_socket_close(sock_iter);
121 /* Delete the plugins */
122 xbt_dict_free(&_gras_trp_plugins);
127 void gras_trp_plugin_free(void *p) {
128 gras_trp_plugin_t plug = p;
133 } else if (plug->data) {
134 DEBUG1("Plugin %s lacks exit(). Free data anyway.",plug->name);
145 * gras_trp_socket_new:
147 * Malloc a new socket, and initialize it with defaults
149 void gras_trp_socket_new(int incoming,
150 gras_socket_t *dst) {
152 gras_socket_t sock=xbt_new0(s_gras_socket_t,1);
154 DEBUG1("Create a new socket (%p)", (void*)sock);
158 sock->incoming = incoming ? 1:0;
159 sock->outgoing = incoming ? 0:1;
160 sock->accepting = incoming ? 1:0;
165 sock->peer_port = -1;
166 sock->peer_name = NULL;
169 sock->bufdata = NULL;
173 xbt_dynar_push(gras_socketset_get(),dst);
179 * gras_socket_server_ext:
181 * Opens a server socket and make it ready to be listened to.
182 * In real life, you'll get a TCP socket.
185 gras_socket_server_ext(unsigned short port,
187 unsigned long int bufSize,
191 gras_trp_plugin_t trp;
194 DEBUG2("Create a server socket from plugin %s on port %d",
195 gras_if_RL() ? "tcp" : "sg",
197 trp = gras_trp_plugin_get_by_name(gras_if_SG() ? "sg":(measurement?"tcp":"buf"));
199 /* defaults settings */
200 gras_trp_socket_new(1,&sock);
203 sock->bufSize = bufSize;
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',
213 sock->accepting?'y':'n');
223 * gras_socket_client_ext:
225 * Opens a client socket to a remote host.
226 * In real life, you'll get a TCP socket.
229 gras_socket_client_ext(const char *host,
232 unsigned long int bufSize,
236 gras_trp_plugin_t trp;
239 trp = gras_trp_plugin_get_by_name(gras_if_SG() ? "sg":(measurement?"tcp":"buf"));
241 DEBUG1("Create a client socket from plugin %s",gras_if_RL() ? "tcp" : "sg");
242 /* defaults settings */
243 gras_trp_socket_new(0,&sock);
245 sock->peer_port = port;
246 sock->peer_name = (char*)strdup(host?host:"localhost");
247 sock->bufSize = bufSize;
248 sock->meas = measurement;
250 /* plugin-specific */
252 (*trp->socket_client)(trp, sock);
253 DEBUG3("in=%c out=%c accept=%c",
254 sock->incoming?'y':'n',
255 sock->outgoing?'y':'n',
256 sock->accepting?'y':'n');
266 * gras_socket_server:
268 * Opens a server socket and make it ready to be listened to.
269 * In real life, you'll get a TCP socket.
272 gras_socket_server(unsigned short port) {
273 return gras_socket_server_ext(port,32,0);
277 * gras_socket_client:
279 * Opens a client socket to a remote host.
280 * In real life, you'll get a TCP socket.
283 gras_socket_client(const char *host,
284 unsigned short port) {
285 return gras_socket_client_ext(host,port,32,0);
289 void gras_socket_close(gras_socket_t sock) {
290 xbt_dynar_t sockets = gras_socketset_get();
291 gras_socket_t sock_iter;
295 /* FIXME: Issue an event when the socket is closed */
297 xbt_dynar_foreach(sockets,cursor,sock_iter) {
298 if (sock == sock_iter) {
299 xbt_dynar_cursor_rm(sockets,&cursor);
300 if (sock->plugin->socket_close)
301 (* sock->plugin->socket_close)(sock);
303 /* free the memory */
305 free(sock->peer_name);
311 WARN1("Ignoring request to free an unknown socket (%p)",sock);
319 * Send a bunch of bytes from on socket
320 * (stable if we know the storage will keep as is until the next trp_flush)
323 gras_trp_send(gras_socket_t sd, char *data, long int size, int stable) {
324 xbt_assert0(sd->outgoing,"Socket not suited for data send");
325 (*sd->plugin->send)(sd,data,size,stable);
328 * gras_trp_chunk_recv:
330 * Receive a bunch of bytes from a socket
333 gras_trp_recv(gras_socket_t sd, char *data, long int size) {
334 xbt_assert0(sd->incoming,"Socket not suited for data receive");
335 (sd->plugin->recv)(sd,data,size);
341 * Make sure all pending communications are done
344 gras_trp_flush(gras_socket_t sd) {
345 if (sd->plugin->flush)
346 (sd->plugin->flush)(sd);
350 gras_trp_plugin_get_by_name(const char *name){
351 return xbt_dict_get(_gras_trp_plugins,name);
354 int gras_socket_my_port (gras_socket_t sock) {
357 int gras_socket_peer_port(gras_socket_t sock) {
358 return sock->peer_port;
360 char *gras_socket_peer_name(gras_socket_t sock) {
361 return sock->peer_name;
364 /** \brief Check if the provided socket is a measurement one (or a regular one) */
365 int gras_socket_is_meas(gras_socket_t sock) {
369 /** \brief Send a chunk of (random) data over a measurement socket
371 * @param peer measurement socket to use for the experiment
372 * @param timeout timeout (in seconds)
373 * @param exp_size total amount of data to send (in bytes).
374 * @param msg_size size of each chunk sent over the socket (in bytes).
376 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
377 * each side of the socket should be paired.
379 * The exchanged data is zeroed to make sure it's initialized, but
380 * there is no way to control what is sent (ie, you cannot use these
381 * functions to exchange data out of band).
383 void gras_socket_meas_send(gras_socket_t peer,
384 unsigned int timeout,
385 unsigned long int exp_size,
386 unsigned long int msg_size) {
387 char *chunk = xbt_malloc0(msg_size);
388 unsigned long int exp_sofar;
392 xbt_assert0(peer->meas,"Asked to send measurement data on a regular socket");
393 xbt_assert0(peer->outgoing,"Socket not suited for data send");
395 for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += msg_size) {
396 CDEBUG5(trp_meas,"Sent %lu of %lu (msg_size=%ld) to %s:%d",
397 exp_sofar,exp_size,msg_size,
398 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
399 (*peer->plugin->raw_send)(peer,chunk,msg_size);
401 CDEBUG5(trp_meas,"Sent %lu of %lu (msg_size=%ld) to %s:%d",
402 exp_sofar,exp_size,msg_size,
403 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
410 /** \brief Receive a chunk of data over a measurement socket
412 * Calls to gras_socket_meas_send() and gras_socket_meas_recv() on
413 * each side of the socket should be paired.
415 void gras_socket_meas_recv(gras_socket_t peer,
416 unsigned int timeout,
417 unsigned long int exp_size,
418 unsigned long int msg_size){
420 char *chunk = xbt_malloc(msg_size);
421 unsigned long int exp_sofar;
425 xbt_assert0(peer->meas,
426 "Asked to receive measurement data on a regular socket");
427 xbt_assert0(peer->incoming,"Socket not suited for data receive");
429 for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += msg_size) {
430 CDEBUG5(trp_meas,"Recvd %ld of %lu (msg_size=%ld) from %s:%d",
431 exp_sofar,exp_size,msg_size,
432 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
433 (peer->plugin->raw_recv)(peer,chunk,msg_size);
435 CDEBUG5(trp_meas,"Recvd %ld of %lu (msg_size=%ld) from %s:%d",
436 exp_sofar,exp_size,msg_size,
437 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
444 * \brief Something similar to the good old accept system call.
446 * Make sure that there is someone speaking to the provided server socket.
447 * In RL, it does an accept(2) and return the result as last argument.
448 * In SG, as accepts are useless, it returns the provided argument as result.
449 * You should thus test whether (peer != accepted) before closing both of them.
451 * You should only call this on measurement sockets. It is automatically
452 * done for regular sockets, but you usually want more control about
453 * what's going on with measurement sockets.
455 gras_socket_t gras_socket_meas_accept(gras_socket_t peer){
458 xbt_assert0(peer->meas,
459 "No need to accept on non-measurement sockets (it's automatic)");
461 if (!peer->accepting) {
462 /* nothing to accept here */
466 res = (peer->plugin->socket_accept)(peer);
467 res->meas = peer->meas;
468 CDEBUG1(trp_meas,"meas_accepted onto %d",res->sd);
475 * Creating procdata for this module
477 static void *gras_trp_procdata_new() {
478 gras_trp_procdata_t res = xbt_new(s_gras_trp_procdata_t,1);
480 res->name = xbt_strdup("gras_trp");
482 res->sockets = xbt_dynar_new(sizeof(gras_socket_t*), NULL);
488 * Freeing procdata for this module
490 static void gras_trp_procdata_free(void *data) {
491 gras_trp_procdata_t res = (gras_trp_procdata_t)data;
493 xbt_dynar_free(&( res->sockets ));
498 * Module registration
500 int gras_trp_libdata_id;
501 void gras_trp_register() {
502 gras_trp_libdata_id = gras_procdata_add("gras_trp",gras_trp_procdata_new, gras_trp_procdata_free);
507 gras_socketset_get(void) {
509 return ((gras_trp_procdata_t) gras_libdata_by_id(gras_trp_libdata_id))->sockets;