2 This file is part of GNUnet.
3 (C) 2012 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 #include <gnunet_util_lib.h>
23 #include <microhttpd.h>
24 #include "gns_proxy_proto.h"
27 #define GNUNET_GNS_PROXY_PORT 7777
29 //TODO maybe make this an api call
31 * Checks if name is in tld
33 * @param name the name to check
34 * @param tld the TLD to check for
35 * @return GNUNET_YES or GNUNET_NO
38 is_tld(const char* name, const char* tld)
42 if (strlen(name) <= strlen(tld))
47 offset = strlen(name)-strlen(tld);
48 if (strcmp (name+offset, tld) != 0)
50 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
51 "%s is not in .%s TLD\n", name, tld);
60 struct GNUNET_NETWORK_Handle *sock;
61 struct GNUNET_NETWORK_Handle *remote_sock;
65 GNUNET_SCHEDULER_TaskIdentifier rtask;
66 GNUNET_SCHEDULER_TaskIdentifier fwdrtask;
67 GNUNET_SCHEDULER_TaskIdentifier wtask;
68 GNUNET_SCHEDULER_TaskIdentifier fwdwtask;
72 unsigned int rbuf_len;
73 unsigned int wbuf_len;
76 unsigned long port = GNUNET_GNS_PROXY_PORT;
77 static struct GNUNET_NETWORK_Handle *lsock;
78 GNUNET_SCHEDULER_TaskIdentifier ltask;
79 static struct MHD_Daemon *httpd;
80 static GNUNET_SCHEDULER_TaskIdentifier httpd_task;
83 con_val_iter (void *cls,
84 enum MHD_ValueKind kind,
88 char* buf = (char*)cls;
89 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
90 "%s:%s\n", key, value);
92 if (0 == strcmp ("Host", key))
101 * Main MHD callback for handling requests.
104 * @param connection MHD connection handle
105 * @param method the HTTP method used ("GET", "PUT", etc.)
106 * @param version the HTTP version string (i.e. "HTTP/1.1")
107 * @param upload_data the data being uploaded (excluding HEADERS,
108 * for a POST that fits into memory and that is encoded
109 * with a supported encoding, the POST data will NOT be
110 * given in upload_data and is instead available as
111 * part of MHD_get_connection_values; very large POST
112 * data *will* be made available incrementally in
114 * @param upload_data_size set initially to the size of the
115 * upload_data provided; the method must update this
116 * value to the number of bytes NOT processed;
117 * @param ptr pointer to location where we store the 'struct Request'
118 * @return MHD_YES if the connection was handled successfully,
119 * MHD_NO if the socket must be closed due to a serious
120 * error while handling the request
123 create_response (void *cls,
124 struct MHD_Connection *con,
128 const char *upload_data,
129 size_t *upload_data_size,
133 const char* page = "<html><head><title>gnoxy</title>"\
134 "</head><body>gnoxy demo</body></html>";
135 struct MHD_Response *response;
139 if (0 != strcmp (meth, "GET"))
141 if (&dummy != *con_cls)
147 if (0 != *upload_data_size)
152 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
155 MHD_get_connection_values (con,
157 &con_val_iter, host);
159 response = MHD_create_response_from_buffer (strlen (page),
161 MHD_RESPMEM_PERSISTENT);
162 ret = MHD_queue_response (con,
165 MHD_destroy_response (response);
170 * Task run whenever HTTP server operations are pending.
173 * @param tc sched context
177 const struct GNUNET_SCHEDULER_TaskContext *tc);
188 struct GNUNET_NETWORK_FDSet *wrs;
189 struct GNUNET_NETWORK_FDSet *wws;
190 struct GNUNET_NETWORK_FDSet *wes;
193 unsigned MHD_LONG_LONG timeout;
194 struct GNUNET_TIME_Relative tv;
199 wrs = GNUNET_NETWORK_fdset_create ();
200 wes = GNUNET_NETWORK_fdset_create ();
201 wws = GNUNET_NETWORK_fdset_create ();
203 GNUNET_assert (MHD_YES == MHD_get_fdset (httpd, &rs, &ws, &es, &max));
204 haveto = MHD_get_timeout (httpd, &timeout);
206 if (haveto == MHD_YES)
207 tv.rel_value = (uint64_t) timeout;
209 tv = GNUNET_TIME_UNIT_FOREVER_REL;
210 GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max + 1);
211 GNUNET_NETWORK_fdset_copy_native (wws, &ws, max + 1);
212 GNUNET_NETWORK_fdset_copy_native (wes, &es, max + 1);
214 if (httpd_task != GNUNET_SCHEDULER_NO_TASK)
215 GNUNET_SCHEDULER_cancel (httpd_task);
217 GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH,
220 GNUNET_NETWORK_fdset_destroy (wrs);
221 GNUNET_NETWORK_fdset_destroy (wws);
222 GNUNET_NETWORK_fdset_destroy (wes);
226 * Task run whenever HTTP server operations are pending.
229 * @param tc sched context
233 const struct GNUNET_SCHEDULER_TaskContext *tc)
235 httpd_task = GNUNET_SCHEDULER_NO_TASK;
241 * Read data from socket
243 * @param cls the closure
244 * @param tc scheduler context
247 do_read (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
250 * Read from remote end
253 * @param tc scheduler context
256 do_read_remote (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
259 * Write data to remote socket
261 * @param cls the closure
262 * @param tc scheduler context
265 do_write_remote (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
267 struct Socks5Request *s5r = cls;
270 s5r->fwdwtask = GNUNET_SCHEDULER_NO_TASK;
272 if ((NULL != tc->read_ready) &&
273 (GNUNET_NETWORK_fdset_isset (tc->write_ready, s5r->remote_sock)) &&
274 (len = GNUNET_NETWORK_socket_send (s5r->remote_sock, s5r->rbuf,
277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
278 "Successfully sent %d bytes to remote socket\n",
283 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "write remote");
285 if (s5r->rtask != GNUNET_SCHEDULER_NO_TASK)
286 GNUNET_SCHEDULER_cancel (s5r->rtask);
287 if (s5r->wtask != GNUNET_SCHEDULER_NO_TASK)
288 GNUNET_SCHEDULER_cancel (s5r->wtask);
289 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
290 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
291 GNUNET_NETWORK_socket_close (s5r->remote_sock);
292 GNUNET_NETWORK_socket_close (s5r->sock);
298 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
305 * Write data to socket
307 * @param cls the closure
308 * @param tc scheduler context
311 do_write (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
313 struct Socks5Request *s5r = cls;
316 s5r->wtask = GNUNET_SCHEDULER_NO_TASK;
318 if ((NULL != tc->read_ready) &&
319 (GNUNET_NETWORK_fdset_isset (tc->write_ready, s5r->sock)) &&
320 (len = GNUNET_NETWORK_socket_send (s5r->sock, s5r->wbuf,
323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
324 "Successfully sent %d bytes to socket\n",
330 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "write");
332 if (s5r->rtask != GNUNET_SCHEDULER_NO_TASK)
333 GNUNET_SCHEDULER_cancel (s5r->rtask);
334 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
335 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
336 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
337 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
338 GNUNET_NETWORK_socket_close (s5r->remote_sock);
339 GNUNET_NETWORK_socket_close (s5r->sock);
344 if ((s5r->state == SOCKS5_DATA_TRANSFER) &&
345 (s5r->fwdrtask == GNUNET_SCHEDULER_NO_TASK))
347 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
349 &do_read_remote, s5r);
353 * Read from remote end
356 * @param tc scheduler context
359 do_read_remote (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
361 struct Socks5Request *s5r = cls;
363 s5r->fwdrtask = GNUNET_SCHEDULER_NO_TASK;
366 if ((NULL != tc->write_ready) &&
367 (GNUNET_NETWORK_fdset_isset (tc->read_ready, s5r->remote_sock)) &&
368 (s5r->wbuf_len = GNUNET_NETWORK_socket_recv (s5r->remote_sock, s5r->wbuf,
369 sizeof (s5r->wbuf))))
371 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
372 "Successfully read %d bytes from remote socket\n",
377 if (s5r->wbuf_len == 0)
378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
379 "0 bytes received from remote... graceful shutdown!\n");
380 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
381 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
382 if (s5r->rtask != GNUNET_SCHEDULER_NO_TASK)
383 GNUNET_SCHEDULER_cancel (s5r->rtask);
385 GNUNET_NETWORK_socket_close (s5r->remote_sock);
386 s5r->remote_sock = NULL;
387 GNUNET_NETWORK_socket_close (s5r->sock);
393 s5r->wtask = GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
401 add_handle_to_mhd (struct GNUNET_NETWORK_Handle *h)
404 struct sockaddr *addr;
407 fd = GNUNET_NETWORK_get_fd (h);
408 addr = GNUNET_NETWORK_get_addr (h);
409 len = GNUNET_NETWORK_get_addrlen (h);
411 return MHD_add_connection (httpd, fd, addr, len);
415 * Read data from incoming connection
417 * @param cls the closure
418 * @param tc the scheduler context
421 do_read (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
423 struct Socks5Request *s5r = cls;
424 struct socks5_client_hello *c_hello;
425 struct socks5_server_hello *s_hello;
426 struct socks5_client_request *c_req;
427 struct socks5_server_response *s_resp;
432 struct hostent *phost;
434 struct sockaddr_in remote_addr;
435 struct in_addr *r_sin_addr;
437 s5r->rtask = GNUNET_SCHEDULER_NO_TASK;
439 if ((NULL != tc->write_ready) &&
440 (GNUNET_NETWORK_fdset_isset (tc->read_ready, s5r->sock)) &&
441 (s5r->rbuf_len = GNUNET_NETWORK_socket_recv (s5r->sock, s5r->rbuf,
442 sizeof (s5r->rbuf))))
444 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
445 "Successfully read %d bytes from socket\n",
450 if (s5r->rbuf_len != 0)
451 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "read");
453 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disco!\n");
455 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
456 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
457 if (s5r->wtask != GNUNET_SCHEDULER_NO_TASK)
458 GNUNET_SCHEDULER_cancel (s5r->wtask);
459 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
460 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
461 GNUNET_NETWORK_socket_close (s5r->remote_sock);
462 GNUNET_NETWORK_socket_close (s5r->sock);
467 if (s5r->state == SOCKS5_INIT)
469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
471 c_hello = (struct socks5_client_hello*)&s5r->rbuf;
473 GNUNET_assert (c_hello->version == SOCKS_VERSION_5);
475 s_hello = (struct socks5_server_hello*)&s5r->wbuf;
476 s5r->wbuf_len = sizeof( struct socks5_server_hello );
478 s_hello->version = c_hello->version;
479 s_hello->auth_method = SOCKS_AUTH_NONE;
481 /* Write response to client */
482 s5r->wtask = GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
486 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
490 s5r->state = SOCKS5_REQUEST;
494 if (s5r->state == SOCKS5_REQUEST)
496 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
497 "Processing SOCKS5 request\n");
498 c_req = (struct socks5_client_request*)&s5r->rbuf;
499 s_resp = (struct socks5_server_response*)&s5r->wbuf;
500 //Only 10byte for ipv4 response!
501 s5r->wbuf_len = 10;//sizeof (struct socks5_server_response);
503 GNUNET_assert (c_req->addr_type == 3);
505 dom_len = *((uint8_t*)(&(c_req->addr_type) + 1));
506 memset(domain, 0, sizeof(domain));
507 strncpy(domain, (char*)(&(c_req->addr_type) + 2), dom_len);
508 req_port = *((uint16_t*)(&(c_req->addr_type) + 2 + dom_len));
510 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
511 "Requested connection is %s:%d\n",
515 if (is_tld (domain, GNUNET_GNS_TLD) ||
516 is_tld (domain, GNUNET_GNS_TLD_ZKEY))
518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
519 "Requested connection is gnunet tld\n",
524 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
525 _("Failed to start HTTP server\n"));
526 s_resp->version = 0x05;
527 s_resp->reply = 0x01;
529 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
533 //TODO! close socket after the write! schedule task
534 //GNUNET_NETWORK_socket_close (s5r->sock);
539 if (MHD_YES == add_handle_to_mhd ( s5r->sock ))
540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
541 "Sucessfully added client to MHD!\n");
542 s_resp->version = 0x05;
543 s_resp->reply = 0x00;
544 s_resp->reserved = 0x00;
545 s_resp->addr_type = 0x01;
548 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
552 //GNUNET_free ( s5r );
553 //FIXME complete socks resp!
558 phost = (struct hostent*)gethostbyname (domain);
561 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
562 "Resolve %s error!\n", domain );
563 s_resp->version = 0x05;
564 s_resp->reply = 0x01;
566 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
570 //TODO! close socket after the write! schedule task
571 //GNUNET_NETWORK_socket_close (s5r->sock);
576 s5r->remote_sock = GNUNET_NETWORK_socket_create (AF_INET,
579 r_sin_addr = (struct in_addr*)(phost->h_addr);
580 remote_ip = r_sin_addr->s_addr;
581 memset(&remote_addr, 0, sizeof(remote_addr));
582 remote_addr.sin_family = AF_INET;
583 #if HAVE_SOCKADDR_IN_SIN_LEN
584 remote_addr.sin_len = sizeof (remote_addr);
586 remote_addr.sin_addr.s_addr = remote_ip;
587 remote_addr.sin_port = req_port;
589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
590 "target server: %s:%u\n", inet_ntoa(remote_addr.sin_addr),
594 GNUNET_NETWORK_socket_connect ( s5r->remote_sock,
595 (const struct sockaddr*)&remote_addr,
596 sizeof (remote_addr)))
597 && (errno != EINPROGRESS))
599 GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "connect");
600 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
601 "socket request error...\n");
602 s_resp->version = 0x05;
603 s_resp->reply = 0x01;
605 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
612 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
613 "new remote connection\n");
615 s_resp->version = 0x05;
616 s_resp->reply = 0x00;
617 s_resp->reserved = 0x00;
618 s_resp->addr_type = 0x01;
620 s5r->state = SOCKS5_DATA_TRANSFER;
623 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
627 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
635 if (s5r->state == SOCKS5_DATA_TRANSFER)
637 if ((s5r->remote_sock == NULL) || (s5r->rbuf_len == 0))
639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
640 "Closing connection to client\n");
641 if (s5r->rtask != GNUNET_SCHEDULER_NO_TASK)
642 GNUNET_SCHEDULER_cancel (s5r->rtask);
643 if (s5r->fwdwtask != GNUNET_SCHEDULER_NO_TASK)
644 GNUNET_SCHEDULER_cancel (s5r->fwdwtask);
645 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
646 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
647 if (s5r->fwdrtask != GNUNET_SCHEDULER_NO_TASK)
648 GNUNET_SCHEDULER_cancel (s5r->fwdrtask);
650 if (s5r->remote_sock != NULL)
651 GNUNET_NETWORK_socket_close (s5r->remote_sock);
652 GNUNET_NETWORK_socket_close (s5r->sock);
657 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
658 "forwarding %d bytes from client\n", s5r->rbuf_len);
661 GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_UNIT_FOREVER_REL,
663 &do_write_remote, s5r);
665 if (s5r->fwdrtask == GNUNET_SCHEDULER_NO_TASK)
668 GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
670 &do_read_remote, s5r);
676 //GNUNET_CONTAINER_DLL_remove (s5conns.head, s5conns.tail, s5r);
681 * Accept new incoming connections
683 * @param cls the closure
684 * @param tc the scheduler context
687 do_accept (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
689 struct GNUNET_NETWORK_Handle *s;
690 struct Socks5Request *s5r;
692 ltask = GNUNET_SCHEDULER_NO_TASK;
693 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
696 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
700 s = GNUNET_NETWORK_socket_accept (lsock, NULL, NULL);
704 GNUNET_log_strerror (GNUNET_ERROR_TYPE_INFO, "accept");
708 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
709 "Got an inbound connection, waiting for data\n");
711 s5r = GNUNET_malloc (sizeof (struct Socks5Request));
713 s5r->state = SOCKS5_INIT;
714 s5r->wtask = GNUNET_SCHEDULER_NO_TASK;
715 s5r->fwdwtask = GNUNET_SCHEDULER_NO_TASK;
716 s5r->fwdrtask = GNUNET_SCHEDULER_NO_TASK;
717 s5r->rtask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
720 //GNUNET_CONTAINER_DLL_insert (s5conns.head, s5conns.tail, s5r);
724 * Main function that will be run
727 * @param args remaining command-line arguments
728 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
729 * @param cfg configuration
732 run (void *cls, char *const *args, const char *cfgfile,
733 const struct GNUNET_CONFIGURATION_Handle *cfg)
735 struct sockaddr_in sa;
737 memset (&sa, 0, sizeof (sa));
738 sa.sin_family = AF_INET;
739 sa.sin_port = htons (port);
740 #if HAVE_SOCKADDR_IN_SIN_LEN
741 sa.sin_len = sizeof (sa);
744 lsock = GNUNET_NETWORK_socket_create (AF_INET,
748 if ((NULL == lsock) ||
750 GNUNET_NETWORK_socket_bind (lsock, (const struct sockaddr *) &sa,
753 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
754 "Failed to create listen socket bound to `%s'",
755 GNUNET_a2s ((const struct sockaddr *) &sa, sizeof (sa)));
757 GNUNET_NETWORK_socket_close (lsock);
761 if (GNUNET_OK != GNUNET_NETWORK_socket_listen (lsock, 5))
763 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
764 "Failed to listen on socket bound to `%s'",
765 GNUNET_a2s ((const struct sockaddr *) &sa, sizeof (sa)));
769 ltask = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL,
770 lsock, &do_accept, NULL);
772 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
773 "Proxy listens on port %u\n",
776 httpd = MHD_start_daemon (MHD_USE_DEBUG, 4444,
778 &create_response, NULL,
779 MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 128,
780 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 16,
781 MHD_OPTION_NOTIFY_COMPLETED,
789 * The main function for gnunet-gns-proxy.
791 * @param argc number of arguments from the command line
792 * @param argv command line arguments
793 * @return 0 ok, 1 on error
796 main (int argc, char *const *argv)
798 static const struct GNUNET_GETOPT_CommandLineOption options[] = {
800 gettext_noop ("listen on specified port"), 1,
801 &GNUNET_GETOPT_set_string, &port},
802 GNUNET_GETOPT_OPTION_END
807 GNUNET_log_setup ("gnunet-gns-proxy", "WARNING", NULL);
810 GNUNET_PROGRAM_run (argc, argv, "gnunet-gns-proxy",
811 _("GNUnet GNS proxy"),
813 &run, NULL)) ? 0 : 1;