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Commit | Line | Data |
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9abd5e4b KZ |
1 | /* |
2 | * SPDX-License-Identifier: GPL-2.0-or-later | |
1e8d11c4 | 3 | * |
9abd5e4b KZ |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
1e8d11c4 | 8 | * |
9abd5e4b KZ |
9 | * Line discipline loading daemon open a serial device and attach a line |
10 | * discipline on it. | |
1e8d11c4 | 11 | */ |
28e91b83 SK |
12 | #include <errno.h> |
13 | #include <fcntl.h> | |
14 | #include <getopt.h> | |
1e8d11c4 | 15 | #include <stdio.h> |
28e91b83 | 16 | #include <stdlib.h> |
1e8d11c4 | 17 | #include <string.h> |
1e8d11c4 | 18 | #include <sys/ioctl.h> |
28e91b83 SK |
19 | #include <sys/stat.h> |
20 | #include <sys/types.h> | |
f8132752 | 21 | #include <termios.h> |
1e8d11c4 | 22 | #include <unistd.h> |
1e8d11c4 | 23 | |
becc79d5 | 24 | #include "c.h" |
8596f639 | 25 | #include "all-io.h" |
fcba4577 | 26 | #include "nls.h" |
7b2d3de4 | 27 | #include "strutils.h" |
efb8854f | 28 | #include "closestream.h" |
fcba4577 | 29 | |
8596f639 KZ |
30 | #include <signal.h> |
31 | #include <sys/socket.h> | |
32 | #include <linux/if.h> | |
33 | ||
34 | #include <linux/tty.h> /* for N_GSM0710 */ | |
35 | ||
36 | #ifdef LINUX_GSMMUX_H | |
37 | # include <linux/gsmmux.h> /* Add by guowenxue */ | |
38 | #else | |
39 | struct gsm_config | |
40 | { | |
41 | unsigned int adaption; | |
42 | unsigned int encapsulation; | |
43 | unsigned int initiator; | |
44 | unsigned int t1; | |
45 | unsigned int t2; | |
46 | unsigned int t3; | |
47 | unsigned int n2; | |
48 | unsigned int mru; | |
49 | unsigned int mtu; | |
50 | unsigned int k; | |
51 | unsigned int i; | |
52 | unsigned int unused[8]; /* Padding for expansion without | |
53 | breaking stuff */ | |
54 | }; | |
55 | # define GSMIOC_GETCONF _IOR('G', 0, struct gsm_config) | |
56 | # define GSMIOC_SETCONF _IOW('G', 1, struct gsm_config) | |
57 | #endif | |
58 | ||
1e8d11c4 | 59 | #ifndef N_GIGASET_M101 |
f8132752 | 60 | # define N_GIGASET_M101 16 |
1e8d11c4 TS |
61 | #endif |
62 | ||
d5f36dec TS |
63 | #ifndef N_PPS |
64 | # define N_PPS 18 | |
65 | #endif | |
66 | ||
58c17460 TS |
67 | #ifndef N_GSM0710 |
68 | # define N_GSM0710 21 | |
69 | #endif | |
70 | ||
8596f639 KZ |
71 | #define MAXINTROPARMLEN 32 |
72 | ||
f8132752 KZ |
73 | /* attach a line discipline ioctl */ |
74 | #ifndef TIOCSETD | |
75 | # define TIOCSETD 0x5423 | |
1e8d11c4 TS |
76 | #endif |
77 | ||
1e8d11c4 TS |
78 | static int debug = 0; |
79 | ||
7b549aff | 80 | struct ld_table { |
28e91b83 SK |
81 | const char *name; |
82 | int value; | |
7b549aff KZ |
83 | }; |
84 | ||
1e8d11c4 | 85 | /* currently supported line disciplines, plus some aliases */ |
28e91b83 SK |
86 | static const struct ld_table ld_discs[] = { |
87 | { "TTY", N_TTY }, | |
88 | { "SLIP", N_SLIP }, | |
89 | { "MOUSE", N_MOUSE }, | |
90 | { "PPP", N_PPP }, | |
91 | { "STRIP", N_STRIP }, | |
92 | { "AX25", N_AX25 }, | |
93 | { "X25", N_X25 }, | |
94 | { "6PACK", N_6PACK }, | |
95 | { "R3964", N_R3964 }, | |
96 | { "IRDA", N_IRDA }, | |
97 | { "HDLC", N_HDLC }, | |
98 | { "SYNC_PPP", N_SYNC_PPP }, | |
99 | { "SYNCPPP", N_SYNC_PPP }, | |
100 | { "HCI", N_HCI }, | |
58c17460 | 101 | { "GIGASET_M101", N_GIGASET_M101 }, |
a8023b9a SK |
102 | { "M101", N_GIGASET_M101 }, |
103 | { "GIGASET", N_GIGASET_M101 }, | |
58c17460 TS |
104 | { "PPS", N_PPS }, |
105 | { "GSM0710", N_GSM0710}, | |
8596f639 | 106 | { NULL, 0 } |
1e8d11c4 TS |
107 | }; |
108 | ||
b091b880 TS |
109 | /* known c_iflag names */ |
110 | static const struct ld_table ld_iflags[] = | |
111 | { | |
112 | { "IGNBRK", IGNBRK }, | |
113 | { "BRKINT", BRKINT }, | |
114 | { "IGNPAR", IGNPAR }, | |
115 | { "PARMRK", PARMRK }, | |
116 | { "INPCK", INPCK }, | |
117 | { "ISTRIP", ISTRIP }, | |
118 | { "INLCR", INLCR }, | |
119 | { "IGNCR", IGNCR }, | |
120 | { "ICRNL", ICRNL }, | |
121 | { "IUCLC", IUCLC }, | |
122 | { "IXON", IXON }, | |
123 | { "IXANY", IXANY }, | |
124 | { "IXOFF", IXOFF }, | |
125 | { "IMAXBEL", IMAXBEL }, | |
126 | { "IUTF8", IUTF8 }, | |
28e91b83 | 127 | { NULL, 0 } |
b091b880 TS |
128 | }; |
129 | ||
c7da2674 KZ |
130 | static void __attribute__((__format__ (__printf__, 1, 2))) |
131 | dbg(char *fmt, ...) | |
3a134012 SK |
132 | { |
133 | va_list args; | |
134 | ||
135 | if (debug == 0) | |
136 | return; | |
137 | fflush(NULL); | |
3a134012 | 138 | va_start(args, fmt); |
31f85fce SK |
139 | #ifdef HAVE_VWARNX |
140 | vwarnx(fmt, args); | |
141 | #else | |
142 | fprintf(stderr, "%s: ", program_invocation_short_name); | |
3a134012 | 143 | vfprintf(stderr, fmt, args); |
3a134012 | 144 | fprintf(stderr, "\n"); |
31f85fce SK |
145 | #endif |
146 | va_end(args); | |
3a134012 | 147 | fflush(NULL); |
3a134012 SK |
148 | } |
149 | ||
7b549aff | 150 | static int lookup_table(const struct ld_table *tab, const char *str) |
1e8d11c4 | 151 | { |
28e91b83 | 152 | const struct ld_table *t; |
1e8d11c4 | 153 | |
28e91b83 SK |
154 | for (t = tab; t && t->name; t++) |
155 | if (!strcasecmp(t->name, str)) | |
156 | return t->value; | |
157 | return -1; | |
1e8d11c4 TS |
158 | } |
159 | ||
28e91b83 | 160 | static void print_table(FILE * out, const struct ld_table *tab) |
1e8d11c4 | 161 | { |
28e91b83 SK |
162 | const struct ld_table *t; |
163 | int i; | |
164 | ||
165 | for (t = tab, i = 1; t && t->name; t++, i++) { | |
b5225af3 TS |
166 | fprintf(out, " %-12s", t->name); |
167 | if (!(i % 5)) | |
28e91b83 SK |
168 | fputc('\n', out); |
169 | } | |
7b549aff KZ |
170 | } |
171 | ||
b091b880 TS |
172 | static int parse_iflag(char *str, int *set_iflag, int *clr_iflag) |
173 | { | |
28e91b83 | 174 | int iflag; |
7b2d3de4 | 175 | char *s; |
28e91b83 SK |
176 | |
177 | for (s = strtok(str, ","); s != NULL; s = strtok(NULL, ",")) { | |
178 | if (*s == '-') | |
179 | s++; | |
7b2d3de4 | 180 | if ((iflag = lookup_table(ld_iflags, s)) < 0) |
20a39982 | 181 | iflag = strtos32_or_err(s, _("invalid iflag")); |
28e91b83 SK |
182 | if (s > str && *(s - 1) == '-') |
183 | *clr_iflag |= iflag; | |
184 | else | |
185 | *set_iflag |= iflag; | |
b091b880 | 186 | } |
28e91b83 SK |
187 | dbg("iflag (set/clear): %d/%d", *set_iflag, *clr_iflag); |
188 | return 0; | |
b091b880 TS |
189 | } |
190 | ||
191 | ||
5118d1be | 192 | static void __attribute__((__noreturn__)) usage(void) |
7b549aff | 193 | { |
5118d1be | 194 | FILE *out = stdout; |
b5b28b43 | 195 | |
a8023b9a SK |
196 | fputs(USAGE_HEADER, out); |
197 | fprintf(out, _(" %s [options] <ldisc> <device>\n"), program_invocation_short_name); | |
a8023b9a | 198 | |
451dbcfa BS |
199 | fputs(USAGE_SEPARATOR, out); |
200 | fputs(_("Attach a line discipline to a serial line.\n"), out); | |
201 | ||
202 | fputs(USAGE_OPTIONS, out); | |
a8023b9a SK |
203 | fputs(_(" -d, --debug print verbose messages to stderr\n"), out); |
204 | fputs(_(" -s, --speed <value> set serial line speed\n"), out); | |
8596f639 KZ |
205 | fputs(_(" -c, --intro-command <string> intro sent before ldattach\n"), out); |
206 | fputs(_(" -p, --pause <seconds> pause between intro and ldattach\n"), out); | |
a8023b9a SK |
207 | fputs(_(" -7, --sevenbits set character size to 7 bits\n"), out); |
208 | fputs(_(" -8, --eightbits set character size to 8 bits\n"), out); | |
209 | fputs(_(" -n, --noparity set parity to none\n"), out); | |
210 | fputs(_(" -e, --evenparity set parity to even\n"), out); | |
211 | fputs(_(" -o, --oddparity set parity to odd\n"), out); | |
212 | fputs(_(" -1, --onestopbit set stop bits to one\n"), out); | |
213 | fputs(_(" -2, --twostopbits set stop bits to two\n"), out); | |
214 | fputs(_(" -i, --iflag [-]<iflag> set input mode flag\n"), out); | |
5ff20423 | 215 | |
a8023b9a | 216 | fputs(USAGE_SEPARATOR, out); |
bad4c729 | 217 | fprintf(out, USAGE_HELP_OPTIONS(25)); |
158e4182 | 218 | |
28e91b83 SK |
219 | fputs(_("\nKnown <ldisc> names:\n"), out); |
220 | print_table(out, ld_discs); | |
158e4182 KZ |
221 | fputs(USAGE_SEPARATOR, out); |
222 | ||
28e91b83 SK |
223 | fputs(_("\nKnown <iflag> names:\n"), out); |
224 | print_table(out, ld_iflags); | |
158e4182 | 225 | |
bad4c729 | 226 | fprintf(out, USAGE_MAN_TAIL("ldattach(8)")); |
5118d1be | 227 | exit(EXIT_SUCCESS); |
1e8d11c4 TS |
228 | } |
229 | ||
f8132752 KZ |
230 | static int my_cfsetspeed(struct termios *ts, int speed) |
231 | { | |
232 | /* Standard speeds | |
233 | * -- cfsetspeed() is able to translate number to Bxxx constants | |
234 | */ | |
235 | if (cfsetspeed(ts, speed) == 0) | |
236 | return 0; | |
237 | ||
238 | /* Nonstandard speeds | |
28e91b83 SK |
239 | * -- we have to bypass glibc and set the speed manually (because glibc |
240 | * checks for speed and supports Bxxx bit rates only)... | |
f8132752 | 241 | */ |
963413a1 | 242 | #if _HAVE_STRUCT_TERMIOS_C_ISPEED |
28e91b83 | 243 | # define BOTHER 0010000 /* non standard rate */ |
f8132752 KZ |
244 | dbg("using non-standard speeds"); |
245 | ts->c_ospeed = ts->c_ispeed = speed; | |
246 | ts->c_cflag &= ~CBAUD; | |
247 | ts->c_cflag |= BOTHER; | |
248 | return 0; | |
249 | #else | |
250 | return -1; | |
251 | #endif | |
252 | } | |
253 | ||
8596f639 KZ |
254 | static void handler(int s) |
255 | { | |
31f85fce | 256 | dbg("got SIG %i -> exiting", s); |
de13900d | 257 | _exit(EXIT_SUCCESS); |
8596f639 KZ |
258 | } |
259 | ||
260 | static void gsm0710_set_conf(int tty_fd) | |
261 | { | |
262 | struct gsm_config c; | |
263 | ||
264 | /* Add by guowenxue */ | |
265 | /* get n_gsm configuration */ | |
266 | ioctl(tty_fd, GSMIOC_GETCONF, &c); | |
267 | /* we are initiator and need encoding 0 (basic) */ | |
268 | c.initiator = 1; | |
269 | c.encapsulation = 0; | |
270 | /* our modem defaults to a maximum size of 127 bytes */ | |
271 | c.mru = 127; | |
272 | c.mtu = 127; | |
273 | /* set the new configuration */ | |
274 | ioctl(tty_fd, GSMIOC_SETCONF, &c); | |
275 | /* Add by guowenxue end*/ | |
276 | } | |
277 | ||
1e8d11c4 TS |
278 | int main(int argc, char **argv) |
279 | { | |
28e91b83 SK |
280 | int tty_fd; |
281 | struct termios ts; | |
282 | int speed = 0, bits = '-', parity = '-', stop = '-'; | |
283 | int set_iflag = 0, clr_iflag = 0; | |
284 | int ldisc; | |
285 | int optc; | |
28e91b83 | 286 | char *dev; |
8596f639 KZ |
287 | int intropause = 1; |
288 | char *introparm = NULL; | |
289 | ||
28e91b83 SK |
290 | static const struct option opttbl[] = { |
291 | {"speed", required_argument, NULL, 's'}, | |
292 | {"sevenbits", no_argument, NULL, '7'}, | |
293 | {"eightbits", no_argument, NULL, '8'}, | |
294 | {"noparity", no_argument, NULL, 'n'}, | |
295 | {"evenparity", no_argument, NULL, 'e'}, | |
296 | {"oddparity", no_argument, NULL, 'o'}, | |
297 | {"onestopbit", no_argument, NULL, '1'}, | |
298 | {"twostopbits", no_argument, NULL, '2'}, | |
299 | {"iflag", required_argument, NULL, 'i'}, | |
300 | {"help", no_argument, NULL, 'h'}, | |
301 | {"version", no_argument, NULL, 'V'}, | |
302 | {"debug", no_argument, NULL, 'd'}, | |
5bd28f49 KZ |
303 | {"intro-command", required_argument, NULL, 'c'}, |
304 | {"pause", required_argument, NULL, 'p'}, | |
28e91b83 SK |
305 | {NULL, 0, NULL, 0} |
306 | }; | |
307 | ||
8596f639 KZ |
308 | signal(SIGKILL, handler); |
309 | signal(SIGINT, handler); | |
310 | ||
28e91b83 SK |
311 | setlocale(LC_ALL, ""); |
312 | bindtextdomain(PACKAGE, LOCALEDIR); | |
313 | textdomain(PACKAGE); | |
25b7045e | 314 | close_stdout_atexit(); |
28e91b83 SK |
315 | |
316 | /* parse options */ | |
28e91b83 | 317 | if (argc == 0) |
5118d1be RM |
318 | errx(EXIT_FAILURE, _("bad usage")); |
319 | ||
28e91b83 | 320 | while ((optc = |
8596f639 | 321 | getopt_long(argc, argv, "dhV78neo12s:i:c:p:", opttbl, |
28e91b83 SK |
322 | NULL)) >= 0) { |
323 | switch (optc) { | |
324 | case 'd': | |
3a134012 | 325 | debug = 1; |
28e91b83 SK |
326 | break; |
327 | case '1': | |
328 | case '2': | |
329 | stop = optc; | |
330 | break; | |
331 | case '7': | |
332 | case '8': | |
333 | bits = optc; | |
334 | break; | |
335 | case 'n': | |
336 | case 'e': | |
337 | case 'o': | |
338 | parity = optc; | |
339 | break; | |
340 | case 's': | |
20a39982 | 341 | speed = strtos32_or_err(optarg, _("invalid speed argument")); |
28e91b83 | 342 | break; |
8596f639 KZ |
343 | case 'p': |
344 | intropause = strtou32_or_err(optarg, _("invalid pause argument")); | |
345 | if (intropause > 10) | |
346 | errx(EXIT_FAILURE, "invalid pause: %s", optarg); | |
347 | break; | |
348 | case 'c': | |
349 | introparm = optarg; | |
350 | break; | |
28e91b83 SK |
351 | case 'i': |
352 | parse_iflag(optarg, &set_iflag, &clr_iflag); | |
353 | break; | |
2c308875 | 354 | |
28e91b83 | 355 | case 'V': |
2c308875 | 356 | print_version(EXIT_SUCCESS); |
28e91b83 | 357 | case 'h': |
5118d1be | 358 | usage(); |
28e91b83 | 359 | default: |
677ec86c | 360 | errtryhelp(EXIT_FAILURE); |
28e91b83 SK |
361 | } |
362 | } | |
363 | ||
5118d1be RM |
364 | if (argc - optind != 2) { |
365 | warnx(_("not enough arguments")); | |
366 | errtryhelp(EXIT_FAILURE); | |
367 | } | |
28e91b83 SK |
368 | /* parse line discipline specification */ |
369 | ldisc = lookup_table(ld_discs, argv[optind]); | |
7b2d3de4 | 370 | if (ldisc < 0) |
20a39982 | 371 | ldisc = strtos32_or_err(argv[optind], _("invalid line discipline argument")); |
28e91b83 | 372 | |
5687494a TS |
373 | /* ldisc specific option settings */ |
374 | if (ldisc == N_GIGASET_M101) { | |
375 | /* device specific defaults for line speed and data format */ | |
158e4182 KZ |
376 | if (speed == 0) |
377 | speed = 115200; | |
378 | if (bits == '-') | |
379 | bits = '8'; | |
380 | if (parity == '-') | |
381 | parity = 'n'; | |
382 | if (stop == '-') | |
383 | stop = '1'; | |
5687494a TS |
384 | } |
385 | ||
28e91b83 SK |
386 | /* open device */ |
387 | dev = argv[optind + 1]; | |
388 | if ((tty_fd = open(dev, O_RDWR | O_NOCTTY)) < 0) | |
389 | err(EXIT_FAILURE, _("cannot open %s"), dev); | |
390 | if (!isatty(tty_fd)) | |
391 | errx(EXIT_FAILURE, _("%s is not a serial line"), dev); | |
392 | ||
393 | dbg("opened %s", dev); | |
394 | ||
395 | /* set line speed and format */ | |
396 | if (tcgetattr(tty_fd, &ts) < 0) | |
397 | err(EXIT_FAILURE, | |
398 | _("cannot get terminal attributes for %s"), dev); | |
399 | cfmakeraw(&ts); | |
400 | if (speed && my_cfsetspeed(&ts, speed) < 0) | |
401 | errx(EXIT_FAILURE, _("speed %d unsupported"), speed); | |
402 | ||
403 | switch (stop) { | |
1e8d11c4 | 404 | case '1': |
28e91b83 SK |
405 | ts.c_cflag &= ~CSTOPB; |
406 | break; | |
1e8d11c4 | 407 | case '2': |
28e91b83 SK |
408 | ts.c_cflag |= CSTOPB; |
409 | break; | |
ba64bbd2 SK |
410 | case '-': |
411 | break; | |
412 | default: | |
413 | abort(); | |
28e91b83 SK |
414 | } |
415 | switch (bits) { | |
1e8d11c4 | 416 | case '7': |
28e91b83 SK |
417 | ts.c_cflag = (ts.c_cflag & ~CSIZE) | CS7; |
418 | break; | |
1e8d11c4 | 419 | case '8': |
28e91b83 SK |
420 | ts.c_cflag = (ts.c_cflag & ~CSIZE) | CS8; |
421 | break; | |
ba64bbd2 SK |
422 | case '-': |
423 | break; | |
424 | default: | |
425 | abort(); | |
28e91b83 SK |
426 | } |
427 | switch (parity) { | |
1e8d11c4 | 428 | case 'n': |
28e91b83 SK |
429 | ts.c_cflag &= ~(PARENB | PARODD); |
430 | break; | |
1e8d11c4 | 431 | case 'e': |
28e91b83 SK |
432 | ts.c_cflag |= PARENB; |
433 | ts.c_cflag &= ~PARODD; | |
434 | break; | |
1e8d11c4 | 435 | case 'o': |
28e91b83 SK |
436 | ts.c_cflag |= (PARENB | PARODD); |
437 | break; | |
ba64bbd2 SK |
438 | case '-': |
439 | break; | |
440 | default: | |
441 | abort(); | |
1e8d11c4 | 442 | } |
28e91b83 SK |
443 | |
444 | ts.c_cflag |= CREAD; /* just to be on the safe side */ | |
445 | ts.c_iflag |= set_iflag; | |
446 | ts.c_iflag &= ~clr_iflag; | |
447 | ||
448 | if (tcsetattr(tty_fd, TCSAFLUSH, &ts) < 0) | |
449 | err(EXIT_FAILURE, | |
450 | _("cannot set terminal attributes for %s"), dev); | |
451 | ||
452 | dbg("set to raw %d %c%c%c: cflag=0x%x", | |
453 | speed, bits, parity, stop, ts.c_cflag); | |
454 | ||
8596f639 KZ |
455 | if (introparm && *introparm) |
456 | { | |
457 | dbg("intro command is '%s'", introparm); | |
458 | if (write_all(tty_fd, introparm, strlen(introparm)) != 0) | |
459 | err(EXIT_FAILURE, | |
460 | _("cannot write intro command to %s"), dev); | |
461 | ||
462 | if (intropause) { | |
463 | dbg("waiting for %d seconds", intropause); | |
464 | sleep(intropause); | |
465 | } | |
466 | } | |
467 | ||
5687494a | 468 | /* Attach the line discipline. */ |
28e91b83 SK |
469 | if (ioctl(tty_fd, TIOCSETD, &ldisc) < 0) |
470 | err(EXIT_FAILURE, _("cannot set line discipline")); | |
471 | ||
472 | dbg("line discipline set to %d", ldisc); | |
473 | ||
5687494a | 474 | /* ldisc specific post-attach actions */ |
8596f639 KZ |
475 | if (ldisc == N_GSM0710) |
476 | gsm0710_set_conf(tty_fd); | |
477 | ||
28e91b83 SK |
478 | /* Go into background if not in debug mode. */ |
479 | if (!debug && daemon(0, 0) < 0) | |
480 | err(EXIT_FAILURE, _("cannot daemonize")); | |
481 | ||
482 | /* Sleep to keep the line discipline active. */ | |
483 | pause(); | |
484 | ||
485 | exit(EXIT_SUCCESS); | |
1e8d11c4 | 486 | } |