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-rw-r--r--src/transport/gnunet-helper-transport-wlan-dummy.c439
1 files changed, 439 insertions, 0 deletions
diff --git a/src/transport/gnunet-helper-transport-wlan-dummy.c b/src/transport/gnunet-helper-transport-wlan-dummy.c
new file mode 100644
index 000000000..c18216b1c
--- /dev/null
+++ b/src/transport/gnunet-helper-transport-wlan-dummy.c
@@ -0,0 +1,439 @@
1/*
2 This file is part of GNUnet.
3 (C) 2010 Christian Grothoff (and other contributing authors)
4
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.
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 General Public License for more details.
14
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.
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#define FIFO_FILE1 "/tmp/test-transport/api-wlan-p1/WLAN_FIFO_in"
31#define FIFO_FILE2 "/tmp/test-transport/api-wlan-p1/WLAN_FIFO_out"
32
33#define MAXLINE 4096
34
35struct sendbuf
36{
37 unsigned int pos;
38 unsigned int size;
39 char buf[MAXLINE * 2];
40};
41
42static int first;
43
44static int closeprog;
45
46static void
47sigfunc (int sig)
48{
49 closeprog = 1;
50 (void) unlink (FIFO_FILE1);
51 (void) unlink (FIFO_FILE2);
52}
53
54
55/**
56 * function to create GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL message for plugin
57 * @param buffer pointer to buffer for the message
58 * @param mac pointer to the mac address
59 * @return number of bytes written
60 */
61static int
62send_mac_to_plugin (char *buffer, struct MacAddress *mac)
63{
64
65 struct GNUNET_TRANSPORT_WLAN_HelperControlMessage macmsg;
66
67 memcpy (&macmsg.mac, (char *) mac, sizeof (struct MacAddress));
68 macmsg.hdr.size = htons (sizeof (struct GNUNET_TRANSPORT_WLAN_HelperControlMessage));
69 macmsg.hdr.type = htons (GNUNET_MESSAGE_TYPE_WLAN_HELPER_CONTROL);
70
71 memcpy (buffer, &macmsg, sizeof (struct GNUNET_TRANSPORT_WLAN_HelperControlMessage));
72 return sizeof (struct GNUNET_TRANSPORT_WLAN_HelperControlMessage);
73}
74
75static void
76stdin_send (void *cls, void *client, const struct GNUNET_MessageHeader *hdr)
77{
78 struct sendbuf *write_pout = cls;
79 int sendsize;
80 struct GNUNET_MessageHeader newheader;
81 char *to_data;
82 char *to_radiotap;
83 char *to_start;
84
85 sendsize =
86 ntohs (hdr->size) - sizeof (struct Radiotap_Send) +
87 sizeof (struct Radiotap_rx);
88
89 if (GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA != ntohs (hdr->type))
90 {
91 fprintf (stderr, "Function stdin_send: wrong packet type\n");
92 exit (1);
93 }
94 if ((sendsize + write_pout->size) > MAXLINE * 2)
95 {
96 fprintf (stderr, "Function stdin_send: Packet too big for buffer\n");
97 exit (1);
98 }
99
100 newheader.size = htons (sendsize);
101 newheader.type = htons (GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA);
102
103 to_start = write_pout->buf + write_pout->size;
104 memcpy (to_start, &newheader, sizeof (struct GNUNET_MessageHeader));
105 write_pout->size += sizeof (struct GNUNET_MessageHeader);
106
107 to_radiotap = to_start + sizeof (struct GNUNET_MessageHeader);
108 memset (to_radiotap, 0, sizeof (struct Radiotap_rx));
109 write_pout->size += sizeof (struct Radiotap_rx);
110
111 to_data = to_radiotap + sizeof (struct Radiotap_rx);
112 memcpy (to_data,
113 ((char *) hdr) + sizeof (struct Radiotap_Send) +
114 sizeof (struct GNUNET_MessageHeader),
115 ntohs (hdr->size) - sizeof (struct Radiotap_Send) -
116 sizeof (struct GNUNET_MessageHeader));
117 write_pout->size +=
118 ntohs (hdr->size) - sizeof (struct Radiotap_Send) -
119 sizeof (struct GNUNET_MessageHeader);
120}
121
122
123static void
124file_in_send (void *cls, void *client, const struct GNUNET_MessageHeader *hdr)
125{
126 struct sendbuf *write_std = cls;
127 uint16_t sendsize;
128
129 sendsize = ntohs (hdr->size);
130
131 if (GNUNET_MESSAGE_TYPE_WLAN_HELPER_DATA != ntohs (hdr->type))
132 {
133 fprintf (stderr, "Function file_in_send: wrong packet type\n");
134 exit (1);
135 }
136 if ((sendsize + write_std->size) > MAXLINE * 2)
137 {
138 fprintf (stderr, "Function file_in_send: Packet too big for buffer\n");
139 exit (1);
140 }
141
142 memcpy (write_std->buf + write_std->size, hdr, sendsize);
143 write_std->size += sendsize;
144}
145
146
147int
148main (int argc, char *argv[])
149{
150 struct stat st;
151 int erg;
152 FILE *fpin = NULL;
153 FILE *fpout = NULL;
154 int fdpin;
155 int fdpout;
156 char readbuf[MAXLINE];
157 int readsize = 0;
158 struct sendbuf write_std;
159 struct sendbuf write_pout;
160 int ret = 0;
161 int maxfd = 0;
162 fd_set rfds;
163 fd_set wfds;
164 struct timeval tv;
165 int retval;
166 struct GNUNET_SERVER_MessageStreamTokenizer *stdin_mst;
167 struct GNUNET_SERVER_MessageStreamTokenizer *file_in_mst;
168 struct MacAddress macaddr;
169
170 if (2 != argc)
171 {
172 fprintf (stderr,
173 "This program must be started with the operating mode (1 or 2) as the only argument.\n");
174 return 1;
175 }
176 if ((0 != strstr (argv[1], "1")) && (0 != strstr (argv[1], "2")))
177 return 1;
178
179 //make the fifos if needed
180 if (0 != stat (FIFO_FILE1, &st))
181 {
182 if (0 == stat (FIFO_FILE2, &st))
183 {
184 fprintf (stderr, "FIFO_FILE2 exists, but FIFO_FILE1 not\n");
185 exit (1);
186 }
187 umask (0);
188 erg = mkfifo (FIFO_FILE1, 0666);
189 if (0 != erg)
190 {
191 fprintf (stderr, "Error in mkfifo(%s): %s\n", FIFO_FILE1,
192 strerror (errno));
193 //exit(1);
194 }
195 erg = mkfifo (FIFO_FILE2, 0666);
196 if (0 != erg)
197 {
198 fprintf (stderr, "Error in mkfifo(%s): %s\n", FIFO_FILE2,
199 strerror (errno));
200 //exit(1);
201 }
202
203 }
204 else
205 {
206 if (0 != stat (FIFO_FILE2, &st))
207 {
208 fprintf (stderr, "FIFO_FILE1 exists, but FIFO_FILE2 not\n");
209 exit (1);
210 }
211 }
212
213 if (strstr (argv[1], "1"))
214 {
215 //fprintf(stderr, "First\n");
216 first = 1;
217 fpin = fopen (FIFO_FILE1, "r");
218 if (NULL == fpin)
219 {
220 fprintf (stderr, "fopen of read FIFO_FILE1\n");
221 goto end;
222 }
223 fpout = fopen (FIFO_FILE2, "w");
224 if (NULL == fpout)
225 {
226 fprintf (stderr, "fopen of write FIFO_FILE2\n");
227 goto end;
228 }
229
230 }
231 else
232 {
233 first = 0;
234 //fprintf(stderr, "Second\n");
235 fpout = fopen (FIFO_FILE1, "w");
236 if (NULL == fpout)
237 {
238 fprintf (stderr, "fopen of write FIFO_FILE1\n");
239 goto end;
240 }
241 fpin = fopen (FIFO_FILE2, "r");
242 if (NULL == fpin)
243 {
244 fprintf (stderr, "fopen of read FIFO_FILE2\n");
245 goto end;
246 }
247
248 }
249
250 fdpin = fileno (fpin);
251 GNUNET_assert (fpin >= 0);
252
253 if (fdpin >= FD_SETSIZE)
254 {
255 fprintf (stderr, "File fdpin number too large (%d > %u)\n", fdpin,
256 (unsigned int) FD_SETSIZE);
257 goto end;
258 }
259
260 fdpout = fileno (fpout);
261 GNUNET_assert (fdpout >= 0);
262
263 if (fdpout >= FD_SETSIZE)
264 {
265 fprintf (stderr, "File fdpout number too large (%d > %u)\n", fdpout,
266 (unsigned int) FD_SETSIZE);
267 goto end;
268
269 }
270
271 signal (SIGINT, &sigfunc);
272 signal (SIGTERM, &sigfunc);
273
274 write_std.size = 0;
275 write_std.pos = 0;
276 write_pout.size = 0;
277 write_pout.pos = 0;
278 stdin_mst = GNUNET_SERVER_mst_create (&stdin_send, &write_pout);
279 file_in_mst = GNUNET_SERVER_mst_create (&file_in_send, &write_std);
280
281 //Send random mac address
282 macaddr.mac[0] = 0x13;
283 macaddr.mac[1] = 0x22;
284 macaddr.mac[2] = 0x33;
285 macaddr.mac[3] = 0x44;
286 macaddr.mac[4] = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, 256);
287 macaddr.mac[5] = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE, 256);
288 write_std.size = send_mac_to_plugin (write_std.buf, &macaddr);
289
290 while (0 == closeprog)
291 {
292 maxfd = -1;
293 //set timeout
294 tv.tv_sec = 5;
295 tv.tv_usec = 0;
296
297 FD_ZERO (&rfds);
298 // if output queue is empty
299 if (0 == write_pout.size)
300 {
301 FD_SET (STDIN_FILENO, &rfds);
302 maxfd = MAX (STDIN_FILENO, maxfd);
303 }
304 if (0 == write_std.size)
305 {
306 FD_SET (fdpin, &rfds);
307 maxfd = MAX (fdpin, maxfd);
308 }
309 FD_ZERO (&wfds);
310 // if there is something to write
311 if (0 < write_std.size)
312 {
313 FD_SET (STDOUT_FILENO, &wfds);
314 maxfd = MAX (maxfd, STDOUT_FILENO);
315 }
316 if (0 < write_pout.size)
317 {
318 FD_SET (fdpout, &wfds);
319 maxfd = MAX (maxfd, fdpout);
320 }
321
322 retval = select (maxfd + 1, &rfds, &wfds, NULL, &tv);
323 if ((-1 == retval) && (EINTR == errno))
324 continue;
325 if (0 > retval)
326 {
327 fprintf (stderr, "select failed: %s\n", strerror (errno));
328 closeprog = 1;
329 break;
330 }
331
332 if (FD_ISSET (STDOUT_FILENO, &wfds))
333 {
334 ret =
335 write (STDOUT_FILENO, write_std.buf + write_std.pos,
336 write_std.size - write_std.pos);
337 if (0 > ret)
338 {
339 closeprog = 1;
340 fprintf (stderr, "Write ERROR to STDOUT_FILENO: %s\n",
341 strerror (errno));
342 break;
343 }
344 else
345 {
346 write_std.pos += ret;
347 // check if finished
348 if (write_std.pos == write_std.size)
349 {
350 write_std.pos = 0;
351 write_std.size = 0;
352 }
353 }
354 }
355
356 if (FD_ISSET (fdpout, &wfds))
357 {
358 ret =
359 write (fdpout, write_pout.buf + write_pout.pos,
360 write_pout.size - write_pout.pos);
361
362 if (0 > ret)
363 {
364 closeprog = 1;
365 fprintf (stderr, "Write ERROR to fdpout: %s\n", strerror (errno));
366 }
367 else
368 {
369 write_pout.pos += ret;
370 // check if finished
371 if (write_pout.pos == write_pout.size)
372 {
373 write_pout.pos = 0;
374 write_pout.size = 0;
375 }
376 }
377 }
378
379 if (FD_ISSET (STDIN_FILENO, &rfds))
380 {
381 readsize = read (STDIN_FILENO, readbuf, sizeof (readbuf));
382
383 if (0 > readsize)
384 {
385 closeprog = 1;
386 fprintf (stderr, "Error reading from STDIN_FILENO: %s\n",
387 strerror (errno));
388 }
389 else if (0 < readsize)
390 {
391 GNUNET_SERVER_mst_receive (stdin_mst, NULL, readbuf, readsize,
392 GNUNET_NO, GNUNET_NO);
393
394 }
395 else
396 {
397 //eof
398 closeprog = 1;
399 }
400 }
401
402 if (FD_ISSET (fdpin, &rfds))
403 {
404 readsize = read (fdpin, readbuf, sizeof (readbuf));
405 if (0 > readsize)
406 {
407 closeprog = 1;
408 fprintf (stderr, "Error reading from fdpin: %s\n", strerror (errno));
409 break;
410 }
411 else if (0 < readsize)
412 {
413 GNUNET_SERVER_mst_receive (file_in_mst, NULL, readbuf, readsize,
414 GNUNET_NO, GNUNET_NO);
415 }
416 else
417 {
418 //eof
419 closeprog = 1;
420 }
421 }
422 }
423
424 //clean up
425 GNUNET_SERVER_mst_destroy (stdin_mst);
426 GNUNET_SERVER_mst_destroy (file_in_mst);
427
428end:
429 if (fpout != NULL)
430 fclose (fpout);
431 if (fpin != NULL)
432 fclose (fpin);
433 if (1 == first)
434 {
435 (void) unlink (FIFO_FILE1);
436 (void) unlink (FIFO_FILE2);
437 }
438 return 0;
439}