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1 | /* HM-CFG-LAN emulation for HM-CFG-USB | |
2 | * | |
3 | * Copyright (c) 2013-15 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 <stdarg.h> | |
29 | #include <string.h> | |
30 | #include <strings.h> | |
31 | #include <poll.h> | |
32 | #include <signal.h> | |
33 | #include <errno.h> | |
34 | #include <sys/types.h> | |
35 | #include <sys/socket.h> | |
36 | #include <sys/stat.h> | |
37 | #include <fcntl.h> | |
38 | #include <time.h> | |
39 | #include <netinet/in.h> | |
40 | #include <arpa/inet.h> | |
41 | #include <libusb-1.0/libusb.h> | |
42 | ||
43 | #include "version.h" | |
44 | #include "hexdump.h" | |
45 | #include "hmcfgusb.h" | |
46 | #include "util.h" | |
47 | ||
48 | #define PID_FILE "/var/run/hmland.pid" | |
49 | ||
50 | #define DEFAULT_REBOOT_SECONDS 86400 | |
51 | #define LAN_READ_CHUNK_SIZE 2048 | |
52 | /* Don't allow remote clients to consume all of our memory */ | |
53 | #define LAN_MAX_LINE_LENGTH 4096 | |
54 | #define LAN_MAX_BUF_LENGTH 1048576 | |
55 | ||
56 | extern char *optarg; | |
57 | ||
58 | static int impersonate_hmlanif = 0; | |
59 | static int debug = 0; | |
60 | static int verbose = 0; | |
61 | static FILE *logfile = NULL; | |
62 | static int reboot_seconds = 0; | |
63 | static int reboot_at_hour = -1; | |
64 | static int reboot_at_minute = -1; | |
65 | static int reboot_set = 0; | |
66 | static uint8_t *lan_read_buf = NULL; | |
67 | static int lan_read_buflen = 0; | |
68 | ||
69 | struct queued_rx { | |
70 | char *rx; | |
71 | int len; | |
72 | struct queued_rx *next; | |
73 | }; | |
74 | ||
75 | static struct queued_rx *qrx = NULL; | |
76 | static int wait_for_h = 0; | |
77 | ||
78 | #define FLAG_LENGTH_BYTE (1<<0) | |
79 | #define FLAG_FORMAT_HEX (1<<1) | |
80 | #define FLAG_COMMA_BEFORE (1<<2) | |
81 | #define FLAG_COMMA_AFTER (1<<3) | |
82 | #define FLAG_NL (1<<4) | |
83 | #define FLAG_IGNORE_COMMAS (1<<5) | |
84 | ||
85 | #define CHECK_SPACE(x) if ((*outpos + x) > outend) { fprintf(stderr, "Not enough space!\n"); return 0; } | |
86 | #define CHECK_AVAIL(x) if ((*inpos + x) > inend) { fprintf(stderr, "Not enough input available!\n"); return 0; } | |
87 | ||
88 | static void print_timestamp(FILE *f) | |
89 | { | |
90 | struct timeval tv; | |
91 | struct tm *tmp; | |
92 | char ts[32]; | |
93 | ||
94 | gettimeofday(&tv, NULL); | |
95 | tmp = localtime(&tv.tv_sec); | |
96 | memset(ts, 0, sizeof(ts)); | |
97 | strftime(ts, sizeof(ts)-1, "%Y-%m-%d %H:%M:%S", tmp); | |
98 | fprintf(f, "%s.%06ld: ", ts, tv.tv_usec); | |
99 | } | |
100 | ||
101 | static void write_log(char *buf, int len, char *fmt, ...) | |
102 | { | |
103 | va_list ap; | |
104 | int i; | |
105 | ||
106 | if ((!logfile) && (!verbose)) | |
107 | return; | |
108 | ||
109 | if (logfile) | |
110 | print_timestamp(logfile); | |
111 | if (verbose) | |
112 | print_timestamp(stdout); | |
113 | ||
114 | if (fmt) { | |
115 | if (logfile) { | |
116 | va_start(ap, fmt); | |
117 | vfprintf(logfile, fmt, ap); | |
118 | va_end(ap); | |
119 | } | |
120 | if (verbose) { | |
121 | va_start(ap, fmt); | |
122 | vprintf(fmt, ap); | |
123 | va_end(ap); | |
124 | } | |
125 | } | |
126 | ||
127 | if (buf && len) { | |
128 | for (i = 0; i < len; i++) { | |
129 | if (logfile) | |
130 | fprintf(logfile, "%c", buf[i]); | |
131 | if (verbose) | |
132 | printf("%c", buf[i]); | |
133 | } | |
134 | if (logfile) | |
135 | fprintf(logfile, "\n"); | |
136 | if (verbose) | |
137 | printf("\n"); | |
138 | } | |
139 | if (logfile) | |
140 | fflush(logfile); | |
141 | } | |
142 | ||
143 | static int format_part_out(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int len, int flags) | |
144 | { | |
145 | uint8_t *buf_out = *outpos; | |
146 | uint8_t *outend = *outpos + outlen; | |
147 | uint8_t *inend = *inpos + inlen; | |
148 | int i; | |
149 | ||
150 | if (flags & FLAG_COMMA_BEFORE) { | |
151 | CHECK_SPACE(1); | |
152 | **outpos=','; | |
153 | *outpos += 1; | |
154 | } | |
155 | ||
156 | if (flags & FLAG_LENGTH_BYTE) { | |
157 | CHECK_AVAIL(1); | |
158 | len = **inpos; | |
159 | *inpos += 1; | |
160 | } | |
161 | ||
162 | if (flags & FLAG_FORMAT_HEX) { | |
163 | CHECK_AVAIL(len); | |
164 | CHECK_SPACE(len*2); | |
165 | for (i = 0; i < len; i++) { | |
166 | **outpos = nibble_to_ascii(((**inpos) & 0xf0) >> 4); | |
167 | *outpos += 1; | |
168 | **outpos = nibble_to_ascii(((**inpos) & 0xf)); | |
169 | *inpos += 1; *outpos += 1; | |
170 | } | |
171 | } else { | |
172 | CHECK_AVAIL(len); | |
173 | CHECK_SPACE(len); | |
174 | memcpy(*outpos, *inpos, len); | |
175 | *outpos += len; | |
176 | *inpos += len; | |
177 | } | |
178 | ||
179 | if (flags & FLAG_COMMA_AFTER) { | |
180 | CHECK_SPACE(1); | |
181 | **outpos=','; | |
182 | *outpos += 1; | |
183 | } | |
184 | ||
185 | if (flags & FLAG_NL) { | |
186 | CHECK_SPACE(2); | |
187 | **outpos='\r'; | |
188 | *outpos += 1; | |
189 | **outpos='\n'; | |
190 | *outpos += 1; | |
191 | } | |
192 | ||
193 | return *outpos - buf_out; | |
194 | } | |
195 | ||
196 | static int parse_part_in(uint8_t **inpos, int inlen, uint8_t **outpos, int outlen, int flags) | |
197 | { | |
198 | uint8_t *buf_out = *outpos; | |
199 | uint8_t *outend = *outpos + outlen; | |
200 | uint8_t *inend = *inpos + inlen; | |
201 | ||
202 | if (flags & FLAG_LENGTH_BYTE) { | |
203 | int len = 0; | |
204 | uint8_t *ip; | |
205 | ||
206 | ip = *inpos; | |
207 | while(ip < inend) { | |
208 | if (*ip == ',') { | |
209 | ip++; | |
210 | if (!(flags & FLAG_IGNORE_COMMAS)) | |
211 | break; | |
212 | ||
213 | continue; | |
214 | } | |
215 | len++; | |
216 | ip++; | |
217 | } | |
218 | CHECK_SPACE(1); | |
219 | **outpos = (len / 2); | |
220 | *outpos += 1; | |
221 | } | |
222 | ||
223 | while(*inpos < inend) { | |
224 | if (**inpos == ',') { | |
225 | *inpos += 1; | |
226 | if (!(flags & FLAG_IGNORE_COMMAS)) | |
227 | break; | |
228 | ||
229 | continue; | |
230 | } | |
231 | ||
232 | CHECK_SPACE(1); | |
233 | CHECK_AVAIL(2); | |
234 | ||
235 | **outpos = ascii_to_nibble(**inpos) << 4; | |
236 | *inpos += 1; | |
237 | **outpos |= ascii_to_nibble(**inpos); | |
238 | *inpos += 1; *outpos += 1; | |
239 | } | |
240 | ||
241 | return *outpos - buf_out; | |
242 | } | |
243 | ||
244 | static int hmlan_format_out(uint8_t *buf, int buf_len, void *data) | |
245 | { | |
246 | uint8_t out[1024]; | |
247 | uint8_t *outpos; | |
248 | uint8_t *inpos; | |
249 | uint16_t version; | |
250 | int fd = *((int*)data); | |
251 | int w; | |
252 | ||
253 | if (buf_len < 1) | |
254 | return 1; | |
255 | ||
256 | memset(out, 0, sizeof(out)); | |
257 | outpos = out; | |
258 | inpos = buf; | |
259 | ||
260 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, 0); | |
261 | switch(buf[0]) { | |
262 | case 'H': | |
263 | if (impersonate_hmlanif) { | |
264 | buf[5] = 'L'; | |
265 | buf[6] = 'A'; | |
266 | buf[7] = 'N'; | |
267 | } | |
268 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_LENGTH_BYTE); | |
269 | version = inpos[0] << 8; | |
270 | version |= inpos[1]; | |
271 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
272 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 0, FLAG_COMMA_BEFORE | FLAG_LENGTH_BYTE); | |
273 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
274 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
275 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
276 | if (version < 0x03c7) { | |
277 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL); | |
278 | } else { | |
279 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
280 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL); | |
281 | } | |
282 | ||
283 | if (!reboot_set) { | |
284 | int new_reboot_seconds; | |
285 | ||
286 | if (version < 0x03c7) { | |
287 | new_reboot_seconds = DEFAULT_REBOOT_SECONDS; | |
288 | } else { | |
289 | new_reboot_seconds = 0; | |
290 | } | |
291 | ||
292 | if (verbose && new_reboot_seconds && (reboot_seconds != new_reboot_seconds)) | |
293 | printf("Rebooting in %u seconds due to old firmware (0.%d)\n", | |
294 | new_reboot_seconds, version); | |
295 | ||
296 | reboot_seconds = new_reboot_seconds; | |
297 | } | |
298 | ||
299 | break; | |
300 | case 'E': | |
301 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 3, FLAG_FORMAT_HEX); | |
302 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
303 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
304 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
305 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
306 | 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); | |
307 | ||
308 | break; | |
309 | case 'R': | |
310 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX); | |
311 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
312 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 4, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
313 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
314 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 2, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
315 | 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); | |
316 | ||
317 | break; | |
318 | case 'I': | |
319 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX); | |
320 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
321 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE); | |
322 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_COMMA_BEFORE | FLAG_NL); | |
323 | ||
324 | break; | |
325 | case 'G': | |
326 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), 1, FLAG_FORMAT_HEX | FLAG_NL); | |
327 | ||
328 | break; | |
329 | default: | |
330 | format_part_out(&inpos, (buf_len-(inpos-buf)), &outpos, (sizeof(out)-(outpos-out)), buf_len-1, FLAG_FORMAT_HEX | FLAG_NL); | |
331 | hexdump(buf, buf_len, "Unknown> "); | |
332 | break; | |
333 | } | |
334 | ||
335 | /* Queue packet until first respone to 'K' is received */ | |
336 | if (wait_for_h && buf[0] != 'H') { | |
337 | struct queued_rx **rxp = &qrx; | |
338 | ||
339 | while (*rxp) | |
340 | rxp = &((*rxp)->next); | |
341 | ||
342 | *rxp = malloc(sizeof(struct queued_rx)); | |
343 | if (!*rxp) { | |
344 | perror("malloc"); | |
345 | return 0; | |
346 | } | |
347 | ||
348 | memset(*rxp, 0, sizeof(struct queued_rx)); | |
349 | (*rxp)->len = outpos-out; | |
350 | (*rxp)->rx = malloc((*rxp)->len); | |
351 | if (!(*rxp)->rx) { | |
352 | perror("malloc"); | |
353 | return 0; | |
354 | } | |
355 | memset((*rxp)->rx, 0, (*rxp)->len); | |
356 | memcpy((*rxp)->rx, out, (*rxp)->len); | |
357 | ||
358 | return 1; | |
359 | } | |
360 | ||
361 | write_log((char*)out, outpos-out-2, "LAN < "); | |
362 | ||
363 | w = write(fd, out, outpos-out); | |
364 | if (w <= 0) { | |
365 | perror("write"); | |
366 | return 0; | |
367 | } | |
368 | ||
369 | /* Send all queued packets */ | |
370 | if (wait_for_h) { | |
371 | struct queued_rx *curr_rx = qrx; | |
372 | struct queued_rx *last_rx; | |
373 | ||
374 | while (curr_rx) { | |
375 | write_log(curr_rx->rx, curr_rx->len-2, "LAN < "); | |
376 | ||
377 | w = write(fd, curr_rx->rx, curr_rx->len); | |
378 | if (w <= 0) { | |
379 | perror("write"); | |
380 | } | |
381 | last_rx = curr_rx; | |
382 | curr_rx = curr_rx->next; | |
383 | ||
384 | free(last_rx->rx); | |
385 | free(last_rx); | |
386 | } | |
387 | ||
388 | qrx = NULL; | |
389 | ||
390 | wait_for_h = 0; | |
391 | } | |
392 | ||
393 | return 1; | |
394 | } | |
395 | ||
396 | static int hmlan_parse_one(uint8_t *cmd, int last, void *data) | |
397 | { | |
398 | struct hmcfgusb_dev *dev = data; | |
399 | uint8_t out[0x40]; //FIXME!!! | |
400 | uint8_t *outpos; | |
401 | uint8_t *inpos = cmd; | |
402 | ||
403 | outpos = out; | |
404 | ||
405 | if (last == 0) | |
406 | return 1; | |
407 | ||
408 | write_log((char*)cmd, last, "LAN > "); | |
409 | ||
410 | memset(out, 0, sizeof(out)); | |
411 | *outpos++ = *inpos++; | |
412 | ||
413 | switch(*cmd) { | |
414 | case 'S': | |
415 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0); | |
416 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0); | |
417 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0); | |
418 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0); | |
419 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0); | |
420 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE); | |
421 | break; | |
422 | case 'Y': | |
423 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0); | |
424 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0); | |
425 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE); | |
426 | break; | |
427 | case '+': | |
428 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0); | |
429 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0); | |
430 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), 0); | |
431 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), FLAG_LENGTH_BYTE); | |
432 | default: | |
433 | parse_part_in(&inpos, (last-(inpos-cmd)), &outpos, (sizeof(out)-(outpos-out)), FLAG_IGNORE_COMMAS); | |
434 | break; | |
435 | } | |
436 | ||
437 | hmcfgusb_send(dev, out, sizeof(out), 1); | |
438 | ||
439 | return 1; | |
440 | } | |
441 | ||
442 | static int hmlan_parse_in(int fd, void *data) | |
443 | { | |
444 | uint8_t *newbuf; | |
445 | int r; | |
446 | int i; | |
447 | ||
448 | newbuf = realloc(lan_read_buf, lan_read_buflen + LAN_READ_CHUNK_SIZE); | |
449 | if (!newbuf) { | |
450 | perror("realloc"); | |
451 | return 0; | |
452 | } | |
453 | lan_read_buf = newbuf; | |
454 | r = read(fd, lan_read_buf + lan_read_buflen, LAN_READ_CHUNK_SIZE); | |
455 | if (r > 0) { | |
456 | lan_read_buflen += r; | |
457 | if (lan_read_buflen > LAN_MAX_BUF_LENGTH) { | |
458 | if (verbose) | |
459 | printf("Our buffer is bigger than %d bytes (%d bytes), closing connection!\n", LAN_MAX_BUF_LENGTH, lan_read_buflen); | |
460 | return -1; | |
461 | } | |
462 | while(lan_read_buflen > 0) { | |
463 | int found = 0; | |
464 | ||
465 | for (i = 0; i < lan_read_buflen; i++) { | |
466 | if ((lan_read_buf[i] == '\r') || (lan_read_buf[i] == '\n')) { | |
467 | if (i > 0) | |
468 | hmlan_parse_one(lan_read_buf, i, data); | |
469 | memmove(lan_read_buf, lan_read_buf + i + 1, lan_read_buflen - (i + 1)); | |
470 | lan_read_buflen -= (i + 1); | |
471 | found = 1; | |
472 | break; | |
473 | } | |
474 | if (i > LAN_MAX_LINE_LENGTH) { | |
475 | if (verbose) | |
476 | printf("Client sent more than %d bytes without newline, closing connection!\n", LAN_MAX_LINE_LENGTH); | |
477 | return -1; | |
478 | } | |
479 | } | |
480 | if (!found) | |
481 | break; | |
482 | newbuf = realloc(lan_read_buf, lan_read_buflen); | |
483 | if (lan_read_buflen && !newbuf) { | |
484 | perror("realloc"); | |
485 | return 0; | |
486 | } | |
487 | lan_read_buf = newbuf; | |
488 | } | |
489 | } else if (r < 0) { | |
490 | if (errno != ECONNRESET) | |
491 | perror("read"); | |
492 | return r; | |
493 | } else { | |
494 | return 0; | |
495 | } | |
496 | ||
497 | return 1; | |
498 | } | |
499 | ||
500 | static int comm(int fd_in, int fd_out, int master_socket, int flags) | |
501 | { | |
502 | struct hmcfgusb_dev *dev; | |
503 | uint8_t out[0x40]; //FIXME!!! | |
504 | int quit = 0; | |
505 | ||
506 | hmcfgusb_set_debug(debug); | |
507 | ||
508 | dev = hmcfgusb_init(hmlan_format_out, &fd_out); | |
509 | if (!dev) { | |
510 | fprintf(stderr, "Can't initialize HM-CFG-USB!\n"); | |
511 | return 0; | |
512 | } | |
513 | ||
514 | if (dev->bootloader) { | |
515 | if (verbose) | |
516 | printf("HM-CFG-USB in bootloader mode, restarting in normal mode...\n"); | |
517 | ||
518 | hmcfgusb_leave_bootloader(dev); | |
519 | ||
520 | hmcfgusb_close(dev); | |
521 | sleep(1); | |
522 | return 0; | |
523 | } | |
524 | ||
525 | if ((reboot_at_hour != -1) && (reboot_at_minute != -1)) { | |
526 | struct tm *tm_s; | |
527 | time_t tm; | |
528 | ||
529 | tm = time(NULL); | |
530 | tm_s = localtime(&tm); | |
531 | if (tm_s == NULL) { | |
532 | perror("localtime"); | |
533 | return 0; | |
534 | } | |
535 | ||
536 | tm_s->tm_hour = reboot_at_hour; | |
537 | tm_s->tm_min = reboot_at_minute; | |
538 | tm_s->tm_sec = 0; | |
539 | ||
540 | tm = mktime(tm_s); | |
541 | reboot_seconds = tm - dev->opened_at; | |
542 | ||
543 | while (reboot_seconds <= 0) | |
544 | reboot_seconds += 86400; | |
545 | } | |
546 | ||
547 | if (verbose && reboot_seconds) | |
548 | printf("Rebooting in %u seconds\n", reboot_seconds); | |
549 | ||
550 | ||
551 | if (!hmcfgusb_add_pfd(dev, fd_in, POLLIN)) { | |
552 | fprintf(stderr, "Can't add client to pollfd!\n"); | |
553 | hmcfgusb_close(dev); | |
554 | return 0; | |
555 | } | |
556 | ||
557 | if (master_socket >= 0) { | |
558 | if (!hmcfgusb_add_pfd(dev, master_socket, POLLIN)) { | |
559 | fprintf(stderr, "Can't add master_socket to pollfd!\n"); | |
560 | hmcfgusb_close(dev); | |
561 | return 0; | |
562 | } | |
563 | } | |
564 | ||
565 | memset(out, 0, sizeof(out)); | |
566 | out[0] = 'K'; | |
567 | wait_for_h = 1; | |
568 | hmcfgusb_send_null_frame(dev, 1); | |
569 | hmcfgusb_send(dev, out, sizeof(out), 1); | |
570 | ||
571 | while(!quit) { | |
572 | int fd; | |
573 | ||
574 | fd = hmcfgusb_poll(dev, 1000); /* Wakeup device/bus at least once a second */ | |
575 | if (fd >= 0) { | |
576 | if (fd == master_socket) { | |
577 | int client; | |
578 | ||
579 | client = accept(master_socket, NULL, 0); | |
580 | if (client >= 0) { | |
581 | shutdown(client, SHUT_RDWR); | |
582 | close(client); | |
583 | } | |
584 | } else { | |
585 | if (hmlan_parse_in(fd, dev) <= 0) { | |
586 | quit = 1; | |
587 | } | |
588 | } | |
589 | } else if (fd == -1) { | |
590 | if (errno) { | |
591 | if (errno != ETIMEDOUT) { | |
592 | perror("hmcfgusb_poll"); | |
593 | quit = 1; | |
594 | } else { | |
595 | /* periodically wakeup the device */ | |
596 | hmcfgusb_send_null_frame(dev, 1); | |
597 | if (wait_for_h) { | |
598 | memset(out, 0, sizeof(out)); | |
599 | out[0] = 'K'; | |
600 | hmcfgusb_send(dev, out, sizeof(out), 1); | |
601 | } | |
602 | } | |
603 | } | |
604 | } | |
605 | ||
606 | if (reboot_seconds && ((dev->opened_at + reboot_seconds) <= time(NULL))) { | |
607 | if (verbose) { | |
608 | printf("HM-CFG-USB running since %lu seconds, rebooting now...\n", | |
609 | time(NULL) - dev->opened_at); | |
610 | } | |
611 | hmcfgusb_enter_bootloader(dev); | |
612 | } | |
613 | } | |
614 | ||
615 | hmcfgusb_close(dev); | |
616 | return 1; | |
617 | } | |
618 | ||
619 | void sigterm_handler(int sig) | |
620 | { | |
621 | if (unlink(PID_FILE) == -1) | |
622 | perror("Can't remove PID file"); | |
623 | ||
624 | exit(EXIT_SUCCESS); | |
625 | } | |
626 | ||
627 | #define FLAG_DAEMON (1 << 0) | |
628 | #define FLAG_PID_FILE (1 << 1) | |
629 | ||
630 | static int socket_server(char *iface, int port, int flags) | |
631 | { | |
632 | struct sigaction sact; | |
633 | struct sockaddr_in sin; | |
634 | int sock; | |
635 | int n; | |
636 | pid_t pid; | |
637 | ||
638 | if (flags & FLAG_DAEMON) { | |
639 | FILE *pidfile = NULL; | |
640 | ||
641 | if (flags & FLAG_PID_FILE) { | |
642 | int fd; | |
643 | ||
644 | fd = open(PID_FILE, O_CREAT | O_EXCL | O_WRONLY, 0644); | |
645 | if (fd == -1) { | |
646 | if (errno == EEXIST) { | |
647 | pid_t old_pid; | |
648 | pidfile = fopen(PID_FILE, "r"); | |
649 | if (!pidfile) { | |
650 | perror("PID file " PID_FILE " already exists, already running?"); | |
651 | exit(EXIT_FAILURE); | |
652 | } | |
653 | ||
654 | if (fscanf(pidfile, "%u", &old_pid) != 1) { | |
655 | fclose(pidfile); | |
656 | fprintf(stderr, "Can't read old PID from " PID_FILE ", already running?\n"); | |
657 | exit(EXIT_FAILURE); | |
658 | } | |
659 | ||
660 | fclose(pidfile); | |
661 | ||
662 | fprintf(stderr, "Already running with PID %u according to " PID_FILE "!\n", old_pid); | |
663 | exit(EXIT_FAILURE); | |
664 | } | |
665 | perror("Can't create PID file " PID_FILE); | |
666 | exit(EXIT_FAILURE); | |
667 | } | |
668 | ||
669 | pidfile = fdopen(fd, "w"); | |
670 | if (!pidfile) { | |
671 | perror("Can't reopen PID file fd"); | |
672 | exit(EXIT_FAILURE); | |
673 | } | |
674 | ||
675 | memset(&sact, 0, sizeof(sact)); | |
676 | sact.sa_handler = sigterm_handler; | |
677 | ||
678 | if (sigaction(SIGTERM, &sact, NULL) == -1) { | |
679 | perror("sigaction(SIGTERM)"); | |
680 | exit(EXIT_FAILURE); | |
681 | } | |
682 | } | |
683 | ||
684 | pid = fork(); | |
685 | if (pid > 0) { | |
686 | if (pidfile) { | |
687 | fprintf(pidfile, "%u\n", pid); | |
688 | fclose(pidfile); | |
689 | } | |
690 | ||
691 | printf("Daemon with PID %u started!\n", pid); | |
692 | exit(EXIT_SUCCESS); | |
693 | } else if (pid < 0) { | |
694 | perror("fork"); | |
695 | exit(EXIT_FAILURE); | |
696 | } | |
697 | ||
698 | if (pidfile) | |
699 | fclose(pidfile); | |
700 | } | |
701 | ||
702 | memset(&sact, 0, sizeof(sact)); | |
703 | sact.sa_handler = SIG_IGN; | |
704 | ||
705 | if (sigaction(SIGPIPE, &sact, NULL) == -1) { | |
706 | perror("sigaction(SIGPIPE)"); | |
707 | exit(EXIT_FAILURE); | |
708 | } | |
709 | ||
710 | sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP); | |
711 | if (sock == -1) { | |
712 | perror("Can't open socket"); | |
713 | return EXIT_FAILURE; | |
714 | } | |
715 | ||
716 | n = 1; | |
717 | if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1) { | |
718 | perror("Can't set socket options"); | |
719 | return EXIT_FAILURE; | |
720 | } | |
721 | ||
722 | memset(&sin, 0, sizeof(sin)); | |
723 | sin.sin_family = AF_INET; | |
724 | sin.sin_port = htons(port); | |
725 | if (!iface) { | |
726 | sin.sin_addr.s_addr = htonl(INADDR_ANY); | |
727 | } else { | |
728 | if (inet_pton(AF_INET, iface, &(sin.sin_addr.s_addr)) != 1) { | |
729 | fprintf(stderr, "Can't convert IP %s, aborting!\n", iface); | |
730 | return EXIT_FAILURE; | |
731 | } | |
732 | } | |
733 | ||
734 | if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) { | |
735 | perror("Can't bind socket"); | |
736 | return EXIT_FAILURE; | |
737 | } | |
738 | ||
739 | if (listen(sock, 1) == -1) { | |
740 | perror("Can't listen on socket"); | |
741 | return EXIT_FAILURE; | |
742 | } | |
743 | ||
744 | while(1) { | |
745 | struct sockaddr_in csin; | |
746 | socklen_t csinlen; | |
747 | int client; | |
748 | in_addr_t client_addr; | |
749 | ||
750 | memset(&csin, 0, sizeof(csin)); | |
751 | csinlen = sizeof(csin); | |
752 | client = accept(sock, (struct sockaddr*)&csin, &csinlen); | |
753 | if (client == -1) { | |
754 | perror("Couldn't accept client"); | |
755 | continue; | |
756 | } | |
757 | ||
758 | /* FIXME: getnameinfo... */ | |
759 | client_addr = ntohl(csin.sin_addr.s_addr); | |
760 | ||
761 | write_log(NULL, 0, "Client %d.%d.%d.%d connected!\n", | |
762 | (client_addr & 0xff000000) >> 24, | |
763 | (client_addr & 0x00ff0000) >> 16, | |
764 | (client_addr & 0x0000ff00) >> 8, | |
765 | (client_addr & 0x000000ff)); | |
766 | ||
767 | comm(client, client, sock, flags); | |
768 | ||
769 | shutdown(client, SHUT_RDWR); | |
770 | close(client); | |
771 | ||
772 | if (lan_read_buf) | |
773 | free(lan_read_buf); | |
774 | lan_read_buf = NULL; | |
775 | lan_read_buflen = 0; | |
776 | ||
777 | write_log(NULL, 0, "Connection to %d.%d.%d.%d closed!\n", | |
778 | (client_addr & 0xff000000) >> 24, | |
779 | (client_addr & 0x00ff0000) >> 16, | |
780 | (client_addr & 0x0000ff00) >> 8, | |
781 | (client_addr & 0x000000ff)); | |
782 | sleep(1); | |
783 | } | |
784 | ||
785 | return EXIT_SUCCESS; | |
786 | } | |
787 | ||
788 | static int interactive_server(int flags) | |
789 | { | |
790 | if (!comm(STDIN_FILENO, STDOUT_FILENO, -1, flags)) | |
791 | return EXIT_FAILURE; | |
792 | ||
793 | return EXIT_SUCCESS; | |
794 | } | |
795 | ||
796 | void hmlan_syntax(char *prog) | |
797 | { | |
798 | fprintf(stderr, "Syntax: %s options\n\n", prog); | |
799 | fprintf(stderr, "Possible options:\n"); | |
800 | fprintf(stderr, "\t-D\t\tdebug mode\n"); | |
801 | fprintf(stderr, "\t-d\t\tdaemon mode\n"); | |
802 | fprintf(stderr, "\t-h\t\tthis help\n"); | |
803 | fprintf(stderr, "\t-I\t\tpretend to be HM-LAN-IF for compatibility with client-software (previous default)\n"); | |
804 | fprintf(stderr, "\t-i\t\tinteractive mode (connect HM-CFG-USB to terminal)\n"); | |
805 | fprintf(stderr, "\t-l ip\t\tlisten on given IP address only (for example 127.0.0.1)\n"); | |
806 | fprintf(stderr, "\t-L logfile\tlog network-communication to logfile\n"); | |
807 | fprintf(stderr, "\t-P\t\tcreate PID file " PID_FILE " in daemon mode\n"); | |
808 | fprintf(stderr, "\t-p n\t\tlisten on port n (default: 1000)\n"); | |
809 | fprintf(stderr, "\t-r n\t\treboot HM-CFG-USB after n seconds (0: no reboot, default: %u if FW < 0.967, 0 otherwise)\n", DEFAULT_REBOOT_SECONDS); | |
810 | fprintf(stderr, "\t hh:mm\treboot HM-CFG-USB daily at hh:mm\n"); | |
811 | fprintf(stderr, "\t-v\t\tverbose mode\n"); | |
812 | fprintf(stderr, "\t-V\t\tshow version (" VERSION ")\n"); | |
813 | ||
814 | } | |
815 | ||
816 | int main(int argc, char **argv) | |
817 | { | |
818 | int port = 1000; | |
819 | char *iface = NULL; | |
820 | int interactive = 0; | |
821 | int flags = 0; | |
822 | char *ep; | |
823 | int opt; | |
824 | ||
825 | while((opt = getopt(argc, argv, "DdhIiPp:Rr:l:L:vV")) != -1) { | |
826 | switch (opt) { | |
827 | case 'D': | |
828 | debug = 1; | |
829 | verbose = 1; | |
830 | break; | |
831 | case 'd': | |
832 | flags |= FLAG_DAEMON; | |
833 | break; | |
834 | case 'I': | |
835 | impersonate_hmlanif = 1; | |
836 | break; | |
837 | case 'i': | |
838 | interactive = 1; | |
839 | break; | |
840 | case 'P': | |
841 | flags |= FLAG_PID_FILE; | |
842 | break; | |
843 | case 'p': | |
844 | port = strtoul(optarg, &ep, 10); | |
845 | if (*ep != '\0') { | |
846 | fprintf(stderr, "Can't parse port!\n"); | |
847 | exit(EXIT_FAILURE); | |
848 | } | |
849 | break; | |
850 | case 'R': | |
851 | fprintf(stderr, "-R is no longer needed (1s wakeup is default)\n"); | |
852 | break; | |
853 | case 'r': | |
854 | reboot_seconds = strtoul(optarg, &ep, 10); | |
855 | if (*ep != '\0') { | |
856 | if (*ep == ':') { | |
857 | reboot_at_hour = reboot_seconds; | |
858 | ep++; | |
859 | reboot_at_minute = strtoul(ep, &ep, 10); | |
860 | if (*ep != '\0') { | |
861 | fprintf(stderr, "Can't parse reboot-time!\n"); | |
862 | exit(EXIT_FAILURE); | |
863 | } | |
864 | ||
865 | reboot_seconds = 0; | |
866 | } else { | |
867 | fprintf(stderr, "Can't parse reboot-timeout!\n"); | |
868 | exit(EXIT_FAILURE); | |
869 | } | |
870 | } | |
871 | reboot_set = 1; | |
872 | break; | |
873 | case 'l': | |
874 | iface = optarg; | |
875 | break; | |
876 | case 'L': | |
877 | logfile = fopen(optarg, "a"); | |
878 | if (!logfile) { | |
879 | perror("fopen(logfile)"); | |
880 | exit(EXIT_FAILURE); | |
881 | } | |
882 | break; | |
883 | case 'v': | |
884 | verbose = 1; | |
885 | break; | |
886 | case 'V': | |
887 | printf("hmland " VERSION "\n"); | |
888 | printf("Copyright (c) 2013-15 Michael Gernoth\n\n"); | |
889 | exit(EXIT_SUCCESS); | |
890 | case 'h': | |
891 | case ':': | |
892 | case '?': | |
893 | default: | |
894 | hmlan_syntax(argv[0]); | |
895 | exit(EXIT_FAILURE); | |
896 | break; | |
897 | } | |
898 | } | |
899 | ||
900 | if (interactive) { | |
901 | return interactive_server(flags); | |
902 | } else { | |
903 | return socket_server(iface, port, flags); | |
904 | } | |
905 | } |