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-rw-r--r--src/transport/gnunet-helper-transport-wlan-dummy.c520
1 files changed, 0 insertions, 520 deletions
diff --git a/src/transport/gnunet-helper-transport-wlan-dummy.c b/src/transport/gnunet-helper-transport-wlan-dummy.c
deleted file mode 100644
index ab77f5c68..000000000
--- a/src/transport/gnunet-helper-transport-wlan-dummy.c
+++ /dev/null
@@ -1,520 +0,0 @@
1/*
2 This file is part of GNUnet.
3 Copyright (C) 2010, 2012 GNUnet e.V.
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
9
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 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20/**
21 * @file transport/gnunet-helper-transport-wlan-dummy.c
22 * @brief helper for the testcases for plugin_transport_wlan.c
23 * @author David Brodski
24 */
25#include "platform.h"
26#include "gnunet_protocols.h"
27#include "gnunet_util_lib.h"
28#include "plugin_transport_wlan.h"
29
30/**
31 * Name of the fifo to use for IPC with the other dummy process.
32 */
33#define FIFO_FILE1 "/tmp/test-transport/api-wlan-p1/WLAN_FIFO_in"
34
35/**
36 * Name of the fifo to use for IPC with the other dummy process.
37 */
38#define FIFO_FILE2 "/tmp/test-transport/api-wlan-p1/WLAN_FIFO_out"
39
40/**
41 * Maximum size of a message allowed in either direction
42 * (used for our receive and sent buffers).
43 */
44#define MAXLINE 4096
45
46
47/**
48 * IO buffer used for buffering data in transit.
49 */
50struct SendBuffer
51{
52 /**
53 * How many bytes that were stored in 'buf' did we already write to the
54 * destination? Always smaller than 'size'.
55 */
56 size_t pos;
57
58 /**
59 * How many bytes of data are stored in 'buf' for transmission right now?
60 * Data always starts at offset 0 and extends to 'size'.
61 */
62 size_t size;
63
64 /**
65 * Buffered data; twice the maximum allowed message size as we add some
66 * headers.
67 */
68 char buf[MAXLINE * 2];
69};
70
71
72/**
73 * Flag set to 1 if we are to terminate, otherwise 0.
74 */
75static int closeprog;
76
77
78/**
79 * We're being killed, clean up.
80 *
81 * @param sig killing signal
82 */
83static void
84sigfunc (int sig)
85{
86 closeprog = 1;
87 (void) unlink (FIFO_FILE1);
88 (void) unlink (FIFO_FILE2);
89}
90
91
92/**
93 * Create control message for plugin
94 *
95 * @param buffer pointer to buffer for the message
96 * @param mac pointer to the mac address
97 * @return number of bytes written
98 */
99static int
100send_mac_to_plugin (char *buffer, struct GNUNET_TRANSPORT_WLAN_MacAddress *mac)
101{
102 struct GNUNET_TRANSPORT_WLAN_HelperControlMessage macmsg;
103
104 GNUNET_memcpy (&macmsg.mac,
105 (char *) mac,
106 sizeof(struct GNUNET_TRANSPORT_WLAN_MacAddress));
107 macmsg.hdr.size =
108 htons (sizeof(struct GNUNET_TRANSPORT_WLAN_HelperControlMessage));
109 macmsg.hdr.type = htons (GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL);
110 GNUNET_memcpy (buffer,
111 &macmsg,
112 sizeof(struct GNUNET_TRANSPORT_WLAN_HelperControlMessage));
113 return sizeof(struct GNUNET_TRANSPORT_WLAN_HelperControlMessage);
114}
115
116
117/**
118 * We got a message from the FIFO, check it, convert the message
119 * type to the output forward and copy it to the buffer for stdout.
120 *
121 * @param cls the 'struct SendBuffer' to copy the converted message to
122 * @param hdr inbound message from the FIFO
123 * @return #GNUNET_OK on success,
124 * #GNUNET_NO to stop further processing (no error)
125 * #GNUNET_SYSERR to stop further processing with error
126 */
127static int
128stdin_send (void *cls, const struct GNUNET_MessageHeader *hdr)
129{
130 struct SendBuffer *write_pout = cls;
131 const struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *in;
132 size_t payload_size;
133 struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage newheader;
134 uint16_t sendsize;
135
136 sendsize = ntohs (hdr->size);
137 in = (const struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage *) hdr;
138 if ((GNUNET_MESSAGE_TYPE_WLAN_DATA_TO_HELPER != ntohs (hdr->type)) ||
139 (sizeof(struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage) > sendsize))
140 {
141 fprintf (stderr, "%s", "Received malformed message\n");
142 exit (1);
143 }
144 payload_size =
145 sendsize - sizeof(struct GNUNET_TRANSPORT_WLAN_RadiotapSendMessage);
146 if ((payload_size
147 + sizeof(struct GNUNET_TRANSPORT_WLAN_RadiotapReceiveMessage)
148 + write_pout->size) > MAXLINE * 2)
149 {
150 fprintf (stderr, "%s", "Packet too big for buffer\n");
151 exit (1);
152 }
153 memset (&newheader, 0, sizeof(newheader));
154 newheader.header.size = htons (payload_size + sizeof(newheader));
155 newheader.header.type = htons (GNUNET_MESSAGE_TYPE_WLAN_DATA_FROM_HELPER);
156 newheader.frame = in->frame;
157 GNUNET_memcpy (write_pout->buf + write_pout->size,
158 &newheader,
159 sizeof(newheader));
160 write_pout->size += sizeof(newheader);
161 GNUNET_memcpy (write_pout->buf + write_pout->size, &in[1], payload_size);
162 write_pout->size += payload_size;
163 return GNUNET_OK;
164}
165
166
167/**
168 * We read a full message from stdin. Copy it to our send buffer.
169 *
170 * @param cls the 'struct SendBuffer' to copy to
171 * @param hdr the message we received to copy to the buffer
172 * @return #GNUNET_OK on success,
173 * #GNUNET_NO to stop further processing (no error)
174 * #GNUNET_SYSERR to stop further processing with error
175 */
176static int
177file_in_send (void *cls, const struct GNUNET_MessageHeader *hdr)
178{
179 struct SendBuffer *write_std = cls;
180 uint16_t sendsize;
181
182 sendsize = ntohs (hdr->size);
183 if ((sendsize + write_std->size) > MAXLINE * 2)
184 {
185 fprintf (stderr, "%s", "Packet too big for buffer\n");
186 exit (1);
187 }
188 GNUNET_memcpy (write_std->buf + write_std->size, hdr, sendsize);
189 write_std->size += sendsize;
190 return GNUNET_OK;
191}
192
193
194/**
195 * Main function of a program that pretends to be a WLAN card.
196 *
197 * @param argc should be 2
198 * @param argv either '1' or '2', depending on which of the two cards this dummy is to emulate
199 * @return 1 on error, 0 if terminated normally via signal
200 */
201int
202main (int argc, char *argv[])
203{
204 struct stat st;
205 int erg;
206 FILE *fpin = NULL;
207 FILE *fpout = NULL;
208 int fdpin;
209 int fdpout;
210 char readbuf[MAXLINE];
211 int readsize;
212 struct SendBuffer write_std;
213 struct SendBuffer write_pout;
214 int ret;
215 int maxfd;
216 fd_set rfds;
217 fd_set wfds;
218 struct timeval tv;
219 int retval;
220 struct GNUNET_MessageStreamTokenizer *stdin_mst = NULL;
221 struct GNUNET_MessageStreamTokenizer *file_in_mst = NULL;
222 struct GNUNET_TRANSPORT_WLAN_MacAddress macaddr;
223 int first;
224
225 if ((2 != argc) ||
226 ((0 != strcmp (argv[1], "1")) && (0 != strcmp (argv[1], "2"))))
227 {
228 fprintf (
229 stderr,
230 "%s",
231 "This program must be started with the operating mode (1 or 2) as the only argument.\n");
232 return 1;
233 }
234
235 /* make the fifos if needed */
236 umask (0);
237 if ((GNUNET_OK != GNUNET_DISK_directory_create_for_file (FIFO_FILE1)) ||
238 (GNUNET_OK != GNUNET_DISK_directory_create_for_file (FIFO_FILE2)))
239 {
240 fprintf (stderr, "Failed to create directory for file `%s'\n", FIFO_FILE1);
241 return 1;
242 }
243 if (0 == strcmp (argv[1], "1"))
244 {
245 if (0 != stat (FIFO_FILE1, &st))
246 {
247 erg = mkfifo (FIFO_FILE1, 0666);
248 if ((0 != erg) && (EEXIST != errno))
249 fprintf (stderr,
250 "Error in mkfifo(%s): %s\n",
251 FIFO_FILE1,
252 strerror (errno));
253 }
254 }
255 else
256 {
257 if (0 != stat (FIFO_FILE2, &st))
258 {
259 GNUNET_break (0 == (erg = mkfifo (FIFO_FILE2, 0666)));
260 if ((0 != erg) && (EEXIST != errno))
261 fprintf (stderr,
262 "Error in mkfifo(%s): %s\n",
263 FIFO_FILE2,
264 strerror (errno));
265 }
266 }
267
268 if (0 == strcmp (argv[1], "1"))
269 {
270 first = 1;
271 fpin = fopen (FIFO_FILE1, "r");
272 if (NULL == fpin)
273 {
274 fprintf (stderr,
275 "fopen of read FIFO_FILE1 failed: %s\n",
276 strerror (errno));
277 goto end;
278 }
279 if (NULL == (fpout = fopen (FIFO_FILE2, "w")))
280 {
281 GNUNET_break (0 == mkfifo (FIFO_FILE2, 0666));
282 fpout = fopen (FIFO_FILE2, "w");
283 }
284 if (NULL == fpout)
285 {
286 fprintf (stderr,
287 "fopen of write FIFO_FILE2 failed: %s\n",
288 strerror (errno));
289 goto end;
290 }
291 }
292 else
293 {
294 first = 0;
295 if (NULL == (fpout = fopen (FIFO_FILE1, "w")))
296 {
297 GNUNET_break (0 == mkfifo (FIFO_FILE1, 0666));
298 fpout = fopen (FIFO_FILE1, "w");
299 }
300 if (NULL == fpout)
301 {
302 fprintf (stderr,
303 "fopen of write FIFO_FILE1 failed: %s\n",
304 strerror (errno));
305 goto end;
306 }
307 fpin = fopen (FIFO_FILE2, "r");
308 if (NULL == fpin)
309 {
310 fprintf (stderr,
311 "fopen of read FIFO_FILE2 failed: %s\n",
312 strerror (errno));
313 goto end;
314 }
315 }
316
317 fdpin = fileno (fpin);
318 GNUNET_assert (fpin >= 0);
319 if (fdpin >= FD_SETSIZE)
320 {
321 fprintf (stderr,
322 "File fdpin number too large (%d > %u)\n",
323 fdpin,
324 (unsigned int) FD_SETSIZE);
325 goto end;
326 }
327
328 fdpout = fileno (fpout);
329 GNUNET_assert (fdpout >= 0);
330
331 if (fdpout >= FD_SETSIZE)
332 {
333 fprintf (stderr,
334 "File fdpout number too large (%d > %u)\n",
335 fdpout,
336 (unsigned int) FD_SETSIZE);
337 goto end;
338 }
339
340 signal (SIGINT, &sigfunc);
341 signal (SIGTERM, &sigfunc);
342 signal (GNUNET_TERM_SIG, &sigfunc);
343
344 write_std.size = 0;
345 write_std.pos = 0;
346 write_pout.size = 0;
347 write_pout.pos = 0;
348 stdin_mst = GNUNET_MST_create (&stdin_send, &write_pout);
349 file_in_mst = GNUNET_MST_create (&file_in_send, &write_std);
350
351 /* Send 'random' mac address */
352 macaddr.mac[0] = 0x13;
353 macaddr.mac[1] = 0x22;
354 macaddr.mac[2] = 0x33;
355 macaddr.mac[3] = 0x44;
356 macaddr.mac[4] = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 256);
357 macaddr.mac[5] = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE, 256);
358 write_std.size = send_mac_to_plugin (write_std.buf, &macaddr);
359
360 while (0 == closeprog)
361 {
362 maxfd = -1;
363 tv.tv_sec = 5;
364 tv.tv_usec = 0;
365
366 FD_ZERO (&rfds);
367 FD_ZERO (&wfds);
368 /* if output queue is empty, read */
369 if (0 == write_pout.size)
370 {
371 FD_SET (STDIN_FILENO, &rfds);
372 maxfd = MAX (STDIN_FILENO, maxfd);
373 }
374 if (0 == write_std.size)
375 {
376 FD_SET (fdpin, &rfds);
377 maxfd = MAX (fdpin, maxfd);
378 }
379
380 /* if there is something to write, try to write */
381 if (0 < write_std.size)
382 {
383 FD_SET (STDOUT_FILENO, &wfds);
384 maxfd = MAX (maxfd, STDOUT_FILENO);
385 }
386 if (0 < write_pout.size)
387 {
388 FD_SET (fdpout, &wfds);
389 maxfd = MAX (maxfd, fdpout);
390 }
391
392 retval = select (maxfd + 1, &rfds, &wfds, NULL, &tv);
393 if ((-1 == retval) && (EINTR == errno))
394 continue;
395 if (0 > retval)
396 {
397 fprintf (stderr, "select failed: %s\n", strerror (errno));
398 closeprog = 1;
399 break;
400 }
401
402 if (FD_ISSET (STDOUT_FILENO, &wfds))
403 {
404 ret = write (STDOUT_FILENO,
405 write_std.buf + write_std.pos,
406 write_std.size - write_std.pos);
407 if (0 > ret)
408 {
409 closeprog = 1;
410 fprintf (stderr,
411 "Write ERROR to STDOUT_FILENO: %s\n",
412 strerror (errno));
413 break;
414 }
415 else
416 {
417 write_std.pos += ret;
418 /* check if finished writing */
419 if (write_std.pos == write_std.size)
420 {
421 write_std.pos = 0;
422 write_std.size = 0;
423 }
424 }
425 }
426
427 if (FD_ISSET (fdpout, &wfds))
428 {
429 ret = write (fdpout,
430 write_pout.buf + write_pout.pos,
431 write_pout.size - write_pout.pos);
432
433 if (0 > ret)
434 {
435 closeprog = 1;
436 fprintf (stderr,
437 "Write ERROR to fdpout failed: %s\n",
438 strerror (errno));
439 }
440 else
441 {
442 write_pout.pos += ret;
443 /* check if finished writing */
444 if (write_pout.pos == write_pout.size)
445 {
446 write_pout.pos = 0;
447 write_pout.size = 0;
448 }
449 }
450 }
451
452 if (FD_ISSET (STDIN_FILENO, &rfds))
453 {
454 readsize = read (STDIN_FILENO, readbuf, sizeof(readbuf));
455
456 if (0 > readsize)
457 {
458 closeprog = 1;
459 fprintf (stderr,
460 "Error reading from STDIN_FILENO: %s\n",
461 strerror (errno));
462 }
463 else if (0 < readsize)
464 {
465 GNUNET_MST_from_buffer (stdin_mst,
466 readbuf,
467 readsize,
468 GNUNET_NO,
469 GNUNET_NO);
470 }
471 else
472 {
473 /* eof */
474 closeprog = 1;
475 }
476 }
477
478 if (FD_ISSET (fdpin, &rfds))
479 {
480 readsize = read (fdpin, readbuf, sizeof(readbuf));
481 if (0 > readsize)
482 {
483 closeprog = 1;
484 fprintf (stderr, "Error reading from fdpin: %s\n", strerror (errno));
485 break;
486 }
487 else if (0 < readsize)
488 {
489 GNUNET_MST_from_buffer (file_in_mst,
490 readbuf,
491 readsize,
492 GNUNET_NO,
493 GNUNET_NO);
494 }
495 else
496 {
497 /* eof */
498 closeprog = 1;
499 }
500 }
501 }
502
503end:
504 /* clean up */
505 if (NULL != stdin_mst)
506 GNUNET_MST_destroy (stdin_mst);
507 if (NULL != file_in_mst)
508 GNUNET_MST_destroy (file_in_mst);
509
510 if (NULL != fpout)
511 fclose (fpout);
512 if (NULL != fpin)
513 fclose (fpin);
514 if (1 == first)
515 {
516 (void) unlink (FIFO_FILE1);
517 (void) unlink (FIFO_FILE2);
518 }
519 return 0;
520}
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-30 17:32:45 +0000