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. */
11 #include "gras/Transport/transport_private.h"
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(transport,gras,"Conveying bytes over the network");
14 XBT_LOG_NEW_SUBCATEGORY(meas_trp,transport,"Conveying bytes over the network without formating for perf measurements");
15 static short int _gras_trp_started = 0;
17 static xbt_dict_t _gras_trp_plugins; /* All registered plugins */
18 static void gras_trp_plugin_free(void *p); /* free one of the plugins */
21 gras_trp_plugin_new(const char *name, gras_trp_setup_t setup) {
24 gras_trp_plugin_t *plug = xbt_new0(gras_trp_plugin_t, 1);
26 DEBUG1("Create plugin %s",name);
28 plug->name=xbt_strdup(name);
30 errcode = setup(plug);
33 /* SG plugin return mismatch when in RL mode (and vice versa) */
39 xbt_dict_set(_gras_trp_plugins,
40 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("tcp", gras_trp_tcp_setup);
85 gras_trp_plugin_new("file",gras_trp_file_setup);
86 gras_trp_plugin_new("sg",gras_trp_sg_setup);
88 /* buf is composed, so it must come after the others */
89 gras_trp_plugin_new("buf", gras_trp_buf_setup);
97 xbt_dynar_t sockets = gras_socketset_get();
98 gras_socket_t sock_iter;
101 if (_gras_trp_started == 0) {
105 if ( --_gras_trp_started == 0 ) {
106 #ifdef HAVE_WINSOCK_H
107 if ( WSACleanup() == SOCKET_ERROR ) {
108 if ( WSAGetLastError() == WSAEINPROGRESS ) {
109 WSACancelBlockingCall();
115 /* Close all the sockets */
116 xbt_dynar_foreach(sockets,cursor,sock_iter) {
117 VERB1("Closing the socket %p left open on exit. Maybe a socket leak?",
119 gras_socket_close(sock_iter);
122 /* Delete the plugins */
123 xbt_dict_free(&_gras_trp_plugins);
128 void gras_trp_plugin_free(void *p) {
129 gras_trp_plugin_t *plug = p;
134 } else if (plug->data) {
135 DEBUG1("Plugin %s lacks exit(). Free data anyway.",plug->name);
146 * gras_trp_socket_new:
148 * Malloc a new socket, and initialize it with defaults
150 void gras_trp_socket_new(int incoming,
151 gras_socket_t *dst) {
153 gras_socket_t sock=xbt_new0(s_gras_socket_t,1);
155 DEBUG1("Create a new socket (%p)", (void*)sock);
161 sock->incoming = incoming ? 1:0;
162 sock->outgoing = incoming ? 0:1;
163 sock->accepting = incoming ? 1:0;
166 sock->peer_port = -1;
167 sock->peer_name = NULL;
172 xbt_dynar_push(gras_socketset_get(),dst);
178 * gras_socket_server_ext:
180 * Opens a server socket and make it ready to be listened to.
181 * In real life, you'll get a TCP socket.
184 gras_socket_server_ext(unsigned short port,
186 unsigned long int bufSize,
189 /* OUT */ gras_socket_t *dst) {
192 gras_trp_plugin_t *trp;
197 DEBUG2("Create a server socket from plugin %s on port %d",
198 gras_if_RL() ? "tcp" : "sg",
200 TRY(gras_trp_plugin_get_by_name("buf",&trp));
202 /* defaults settings */
203 gras_trp_socket_new(1,&sock);
206 sock->bufSize = bufSize;
207 sock->meas = measurement;
209 /* Call plugin socket creation function */
210 DEBUG1("Prepare socket with plugin (fct=%p)",trp->socket_server);
211 errcode = 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');
217 if (errcode != no_error) {
228 * gras_socket_client_ext:
230 * Opens a client socket to a remote host.
231 * In real life, you'll get a TCP socket.
234 gras_socket_client_ext(const char *host,
237 unsigned long int bufSize,
240 /* OUT */ gras_socket_t *dst) {
243 gras_trp_plugin_t *trp;
248 TRY(gras_trp_plugin_get_by_name("buf",&trp));
250 DEBUG1("Create a client socket from plugin %s",gras_if_RL() ? "tcp" : "sg");
251 /* defaults settings */
252 gras_trp_socket_new(0,&sock);
254 sock->peer_port = port;
255 sock->peer_name = (char*)strdup(host?host:"localhost");
256 sock->bufSize = bufSize;
259 /* plugin-specific */
260 errcode= (*trp->socket_client)(trp, sock);
261 DEBUG3("in=%c out=%c accept=%c",
262 sock->incoming?'y':'n',
263 sock->outgoing?'y':'n',
264 sock->accepting?'y':'n');
266 if (errcode != no_error) {
277 * gras_socket_server:
279 * Opens a server socket and make it ready to be listened to.
280 * In real life, you'll get a TCP socket.
283 gras_socket_server(unsigned short port,
284 /* OUT */ gras_socket_t *dst) {
285 return gras_socket_server_ext(port,32,0,dst);
289 * gras_socket_client:
291 * Opens a client socket to a remote host.
292 * In real life, you'll get a TCP socket.
295 gras_socket_client(const char *host,
297 /* OUT */ gras_socket_t *dst) {
298 return gras_socket_client_ext(host,port,32,0,dst);
302 void gras_socket_close(gras_socket_t sock) {
303 xbt_dynar_t sockets = gras_socketset_get();
304 gras_socket_t sock_iter;
308 /* FIXME: Issue an event when the socket is closed */
310 xbt_dynar_foreach(sockets,cursor,sock_iter) {
311 if (sock == sock_iter) {
312 xbt_dynar_cursor_rm(sockets,&cursor);
313 if (sock->plugin->socket_close)
314 (* sock->plugin->socket_close)(sock);
316 /* free the memory */
318 free(sock->peer_name);
324 WARN1("Ignoring request to free an unknown socket (%p)",sock);
330 * gras_trp_chunk_send:
332 * Send a bunch of bytes from on socket
335 gras_trp_chunk_send(gras_socket_t sd,
338 xbt_assert1(sd->outgoing,
339 "Socket not suited for data send (outgoing=%c)",
340 sd->outgoing?'y':'n');
341 xbt_assert1(sd->plugin->chunk_send,
342 "No function chunk_send on transport plugin %s",
344 return (*sd->plugin->chunk_send)(sd,data,size);
347 * gras_trp_chunk_recv:
349 * Receive a bunch of bytes from a socket
352 gras_trp_chunk_recv(gras_socket_t sd,
355 xbt_assert0(sd->incoming,
356 "Socket not suited for data receive");
357 xbt_assert1(sd->plugin->chunk_recv,
358 "No function chunk_recv on transport plugin %s",
360 return (sd->plugin->chunk_recv)(sd,data,size);
366 * Make sure all pending communications are done
369 gras_trp_flush(gras_socket_t sd) {
370 return (sd->plugin->flush)(sd);
374 gras_trp_plugin_get_by_name(const char *name,
375 gras_trp_plugin_t **dst){
377 return xbt_dict_get(_gras_trp_plugins,name,(void**)dst);
380 int gras_socket_my_port (gras_socket_t sock) {
383 int gras_socket_peer_port(gras_socket_t sock) {
384 return sock->peer_port;
386 char *gras_socket_peer_name(gras_socket_t sock) {
387 return sock->peer_name;
390 xbt_error_t gras_socket_meas_send(gras_socket_t peer,
391 unsigned int timeout,
392 unsigned long int exp_size,
393 unsigned long int msg_size) {
395 char *chunk = xbt_malloc(msg_size);
399 xbt_assert0(peer->meas,"Asked to send measurement data on a regular socket");
400 for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += msg_size) {
401 CDEBUG5(meas_trp,"Sent %d 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));
404 TRY(gras_trp_chunk_send(peer,chunk,msg_size));
406 CDEBUG5(meas_trp,"Sent %d of %lu (msg_size=%ld) to %s:%d",
407 exp_sofar,exp_size,msg_size,
408 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
412 return no_error;/* gras_socket_meas_exchange(peer,1,timeout,expSize,msgSize); */
415 xbt_error_t gras_socket_meas_recv(gras_socket_t peer,
416 unsigned int timeout,
417 unsigned long int exp_size,
418 unsigned long int msg_size){
421 char *chunk = xbt_malloc(msg_size);
425 xbt_assert0(peer->meas,"Asked to receive measurement data on a regular socket\n");
426 for (exp_sofar=0; exp_sofar < exp_size; exp_sofar += msg_size) {
427 CDEBUG5(meas_trp,"Recvd %d of %lu (msg_size=%ld) from %s:%d",
428 exp_sofar,exp_size,msg_size,
429 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
430 TRY(gras_trp_chunk_recv(peer,chunk,msg_size));
432 CDEBUG5(meas_trp,"Recvd %d of %lu (msg_size=%ld) from %s:%d",
433 exp_sofar,exp_size,msg_size,
434 gras_socket_peer_name(peer), gras_socket_peer_port(peer));
438 return no_error;/* gras_socket_meas_exchange(peer,0,timeout,expSize,msgSize); */
442 * Creating procdata for this module
444 static void *gras_trp_procdata_new() {
445 gras_trp_procdata_t res = xbt_new(s_gras_trp_procdata_t,1);
447 res->sockets = xbt_dynar_new(sizeof(gras_socket_t*), NULL);
453 * Freeing procdata for this module
455 static void gras_trp_procdata_free(void *data) {
456 gras_trp_procdata_t res = (gras_trp_procdata_t)data;
458 xbt_dynar_free(&( res->sockets ));
463 * Module registration
465 void gras_trp_register() {
466 gras_procdata_add("gras_trp",gras_trp_procdata_new, gras_trp_procdata_free);
471 gras_socketset_get(void) {
473 return ((gras_trp_procdata_t) gras_libdata_get("gras_trp"))->sockets;