group debug output better
[hmcfgusb] / hmland.c
1 /* HM-CFG-LAN emuldation for HM-CFG-USB
2 *
3 * Copyright (c) 2013 Michael Gernoth <michael@gernoth.net>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to
7 * deal in the Software without restriction, including without limitation the
8 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
9 * sell copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <unistd.h>
27 #include <stdint.h>
28 #include <string.h>
29 #include <strings.h>
30 #include <poll.h>
31 #include <errno.h>
32 #include <sys/types.h>
33 #include <sys/socket.h>
34 #include <netinet/in.h>
35 #include <arpa/inet.h>
36 #include <libusb-1.0/libusb.h>
37
38 #include "hexdump.h"
39 #include "hmcfgusb.h"
40
41 extern char *optarg;
42
43 static int impersonate_hmlanif = 0;
44 static int debug = 0;
45 static int verbose = 0;
46
47 #define FLAG_LENGTH_BYTE (1<<0)
48 #define FLAG_FORMAT_HEX (1<<1)
49 #define FLAG_COMMA_BEFORE (1<<2)
50 #define FLAG_COMMA_AFTER (1<<3)
51 #define FLAG_NL (1<<4)
52 #define FLAG_IGNORE_COMMAS (1<<5)
53
54 #define CHECK_SPACE(x) if ((*outpos + x) > outend) { fprintf(stderr, "Not enough space!\n"); return 0; }
55 #define CHECK_AVAIL(x) if ((*inpos + x) > inend) { fprintf(stderr, "Not enough input available!\n"); return 0; }
56
57 static int format_part_out(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int len, int flags)
58 {
59 uint8_t *buf_out = *outpos;
60 uint8_t *outend = *outpos + outlen;
61 uint8_t *inend = *inpos + inlen;
62 int i;
63
64 if (flags & FLAG_COMMA_BEFORE) {
65 CHECK_SPACE(1);
66 **outpos=',';
67 *outpos += 1;
68 }
69
70 if (flags & FLAG_LENGTH_BYTE) {
71 CHECK_AVAIL(1);
72 len = **inpos;
73 *inpos += 1;
74 }
75
76 if (flags & FLAG_FORMAT_HEX) {
77 char hex[3];
78
79 memset(hex, 0, sizeof(hex));
80
81 CHECK_AVAIL(len);
82 CHECK_SPACE(len*2);
83 for (i = 0; i < len; i++) {
84 if (snprintf(hex, sizeof(hex), "%02X", **inpos) != 2) {
85 fprintf(stderr, "Can't format hex-string!\n");
86 return 0;
87 }
88 *inpos += 1;
89 memcpy(*outpos, hex, 2);
90 *outpos += 2;
91 }
92 } else {
93 CHECK_AVAIL(len);
94 CHECK_SPACE(len);
95 memcpy(*outpos, *inpos, len);
96 *outpos += len;
97 *inpos += len;
98 }
99
100 if (flags & FLAG_COMMA_AFTER) {
101 CHECK_SPACE(1);
102 **outpos=',';
103 *outpos += 1;
104 }
105
106 if (flags & FLAG_NL) {
107 CHECK_SPACE(2);
108 **outpos='\r';
109 *outpos += 1;
110 **outpos='\n';
111 *outpos += 1;
112 }
113
114 return *outpos - buf_out;
115 }
116
117 static int parse_part_in(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int flags)
118 {
119 uint8_t *buf_out = *outpos;
120 uint8_t *outend = *outpos + outlen;
121 uint8_t *inend = *inpos + inlen;
122 char hex[3];
123
124 memset(hex, 0, sizeof(hex));
125
126 if (flags & FLAG_LENGTH_BYTE) {
127 int len = 0;
128 uint8_t *ip;
129
130 ip = *inpos;
131 while(ip < inend) {
132 if (*ip == ',') {
133 ip++;
134 if (!(flags & FLAG_IGNORE_COMMAS))
135 break;
136
137 continue;
138 }
139 len++;
140 ip++;
141 }
142 CHECK_SPACE(1);
143 **outpos = (len / 2);
144 *outpos += 1;
145 }
146
147 while(*inpos < inend) {
148 if (**inpos == ',') {
149 *inpos += 1;
150 if (!(flags & FLAG_IGNORE_COMMAS))
151 break;
152
153 continue;
154 }
155
156 CHECK_SPACE(1);
157 CHECK_AVAIL(2);
158 memcpy(hex, *inpos, 2);
159 *inpos += 2;
160
161 **outpos = strtoul(hex, NULL, 16);
162 *outpos += 1;
163 }
164
165 return *outpos - buf_out;
166 }
167
168 static void hmlan_format_out(uint8_t *buf, int buf_len, void *data)
169 {
170 uint8_t out[1024];
171 uint8_t *outpos;
172 uint8_t *inpos;
173 int fd = *((int*)data);
174
175 if (buf_len < 1)
176 return;
177
178 memset(out, 0, sizeof(out));
179 outpos = out;
180 inpos = buf;
181
182 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 0);
183 switch(buf[0]) {
184 case 'H':
185 if (impersonate_hmlanif) {
186 buf[5] = 'L';
187 buf[6] = 'A';
188 buf[7] = 'N';
189 }
190 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_LENGTH_BYTE);
191 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
192 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE);
193 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
194 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
195 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
196 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
197
198 break;
199 case 'E':
200 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX);
201 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
202 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
203 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
204 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
205 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE | FLAG_NL);
206
207 break;
208 case 'R':
209 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX);
210 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
211 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
212 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
213 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
214 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE | FLAG_NL);
215
216 break;
217 case 'I':
218 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX);
219 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
220 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE);
221 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL);
222
223 break;
224 default:
225 format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), buf_len-1, FLAG_FORMAT_HEX | FLAG_NL);
226 hexdump(buf, buf_len, "Unknown> ");
227 break;
228 }
229 write(fd, out, outpos-out);
230 if (debug)
231 fprintf(stderr, "LAN < %s\n", out);
232 }
233
234 static int hmlan_parse_in(int fd, void *data)
235 {
236 struct hmcfgusb_dev *dev = data;
237 uint8_t buf[1025];
238 uint8_t out[0x40]; //FIXME!!!
239 uint8_t *outpos;
240 uint8_t *inpos;
241 int i;
242 int last;
243 int r;
244
245 memset(buf, 0, sizeof(buf));
246
247 r = read(fd, buf, sizeof(buf)-1);
248 if (r > 0) {
249 uint8_t *inend = buf + r;
250
251 inpos = buf;
252
253 if (debug)
254 fprintf(stderr, "\nLAN > %s", buf);
255
256 while (inpos < inend) {
257 uint8_t *instart = inpos;
258
259 if ((*inpos == '\r') || (*inpos == '\n')) {
260 inpos++;
261 continue;
262 }
263
264 outpos = out;
265
266 last = inend - inpos;
267
268 for (i = 0; i < last; i++) {
269 if ((inpos[i] == '\r') || (inpos[i] == '\n')) {
270 last = i;
271 break;
272 }
273 }
274
275 if (last == 0)
276 continue;
277
278 memset(out, 0, sizeof(out));
279 *outpos++ = *inpos++;
280
281 switch(buf[0]) {
282 case 'S':
283 parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
284 parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
285 parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
286 parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
287 parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), 0);
288 parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE);
289 break;
290 default:
291 parse_part_in(&inpos, (last-(inpos-instart)), &outpos, (sizeof(out)-(outpos-out)), FLAG_IGNORE_COMMAS);
292 break;
293 }
294
295 hmcfgusb_send(dev, out, sizeof(out), 1);
296 }
297 } else if (r < 0) {
298 perror("read");
299 return r;
300 } else {
301 return 0;
302 }
303
304 return 1;
305 }
306
307 static int comm(int fd_in, int fd_out, int master_socket)
308 {
309 struct hmcfgusb_dev *dev;
310 int quit = 0;
311
312 hmcfgusb_set_debug(debug);
313
314 dev = hmcfgusb_init(hmlan_format_out, &fd_out);
315 if (!dev) {
316 fprintf(stderr, "Can't initialize HM-CFG-USB!\n");
317 return 0;
318 }
319
320 if (!hmcfgusb_add_pfd(dev, fd_in, POLLIN)) {
321 fprintf(stderr, "Can't add client to pollfd!\n");
322 hmcfgusb_close(dev);
323 return 0;
324 }
325
326 if (master_socket >= 0) {
327 if (!hmcfgusb_add_pfd(dev, master_socket, POLLIN)) {
328 fprintf(stderr, "Can't add master_socket to pollfd!\n");
329 hmcfgusb_close(dev);
330 return 0;
331 }
332 }
333
334 hmcfgusb_send(dev, (unsigned char*)"K", 1, 1);
335
336 while(!quit) {
337 int fd;
338
339 fd = hmcfgusb_poll(dev, 3600);
340 if (fd >= 0) {
341 if (fd == master_socket) {
342 int client;
343
344 client = accept(master_socket, NULL, 0);
345 if (client >= 0) {
346 shutdown(client, SHUT_RDWR);
347 close(client);
348 }
349 } else {
350 if (hmlan_parse_in(fd, dev) <= 0) {
351 quit = 1;
352 }
353 }
354 } else if (fd == -1) {
355 if (errno) {
356 perror("hmcfgusb_poll");
357 quit = 1;
358 }
359 }
360 }
361
362 hmcfgusb_close(dev);
363 return 1;
364 }
365
366 static int socket_server(int port, int daemon)
367 {
368 struct sockaddr_in sin;
369 int sock;
370 int n;
371 pid_t pid;
372
373 if (daemon) {
374 pid = fork();
375 if (pid > 0) {
376 printf("Daemon with PID %u started!\n", pid);
377 exit(EXIT_SUCCESS);
378 } else if (pid < 0) {
379 perror("fork");
380 exit(EXIT_FAILURE);
381 }
382 }
383
384 impersonate_hmlanif = 1;
385
386 sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
387 if (sock == -1) {
388 perror("Can't open socket");
389 return EXIT_FAILURE;
390 }
391
392 n = 1;
393 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) {
394 perror("Can't set socket options");
395 return EXIT_FAILURE;
396 }
397
398 memset(&sin, 0, sizeof(sin));
399 sin.sin_family = AF_INET;
400 sin.sin_port = htons(port);
401 sin.sin_addr.s_addr = htonl(INADDR_ANY);
402
403 if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) {
404 perror("Can't bind socket");
405 return EXIT_FAILURE;
406 }
407
408 if (listen(sock, 1) == -1) {
409 perror("Can't listen on socket");
410 return EXIT_FAILURE;
411 }
412
413 while(1) {
414 struct sockaddr_in csin;
415 socklen_t csinlen;
416 int client;
417 in_addr_t client_addr;
418
419 memset(&csin, 0, sizeof(csin));
420 csinlen = sizeof(csin);
421 client = accept(sock, (struct sockaddr*)&csin, &csinlen);
422 if (client == -1) {
423 perror("Couldn't accept client");
424 continue;
425 }
426
427 /* FIXME: getnameinfo... */
428 client_addr = ntohl(csin.sin_addr.s_addr);
429
430 if (verbose) {
431 printf("Client %d.%d.%d.%d connected!\n",
432 (client_addr & 0xff000000) >> 24,
433 (client_addr & 0x00ff0000) >> 16,
434 (client_addr & 0x0000ff00) >> 8,
435 (client_addr & 0x000000ff));
436 }
437
438 comm(client, client, sock);
439
440 shutdown(client, SHUT_RDWR);
441 close(client);
442
443 if (verbose) {
444 printf("Connection to %d.%d.%d.%d closed!\n",
445 (client_addr & 0xff000000) >> 24,
446 (client_addr & 0x00ff0000) >> 16,
447 (client_addr & 0x0000ff00) >> 8,
448 (client_addr & 0x000000ff));
449 }
450
451 }
452
453 return EXIT_SUCCESS;
454 }
455
456 static int interactive_server(void)
457 {
458 if (!comm(STDIN_FILENO, STDOUT_FILENO, -1))
459 return EXIT_FAILURE;
460
461 return EXIT_SUCCESS;
462 }
463
464 void hmlan_syntax(char *prog)
465 {
466 fprintf(stderr, "Syntax: %s options\n\n", prog);
467 fprintf(stderr, "Possible options:\n");
468 fprintf(stderr, "\t-D\tdebug mode\n");
469 fprintf(stderr, "\t-d\tdaemon mode\n");
470 fprintf(stderr, "\t-h\tthis help\n");
471 fprintf(stderr, "\t-i\tinteractive mode (connect HM-CFG-USB to terminal)\n");
472 fprintf(stderr, "\t-p n\tlisten on port n (default 1000)\n");
473 fprintf(stderr, "\t-v\tverbose mode\n");
474
475 }
476
477 int main(int argc, char **argv)
478 {
479 int port = 1000;
480 int interactive = 0;
481 int daemon = 0;
482 char *ep;
483 int opt;
484
485 while((opt = getopt(argc, argv, "Ddhip:v")) != -1) {
486 switch (opt) {
487 case 'D':
488 debug = 1;
489 verbose = 1;
490 break;
491 case 'd':
492 daemon = 1;
493 break;
494 case 'i':
495 interactive = 1;
496 break;
497 case 'p':
498 port = strtoul(optarg, &ep, 10);
499 if (*ep != '\0') {
500 fprintf(stderr, "Can't parse port!\n");
501 exit(EXIT_FAILURE);
502 }
503 break;
504 case 'v':
505 verbose = 1;
506 break;
507 case 'h':
508 case ':':
509 case '?':
510 default:
511 hmlan_syntax(argv[0]);
512 exit(EXIT_FAILURE);
513 break;
514 }
515 }
516
517 if (interactive) {
518 return interactive_server();
519 } else {
520 return socket_server(port, daemon);
521 }
522 }
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