d3372da9 |
1 | /* |
2 | * Dolda Connect - Modular multiuser Direct Connect-style client |
3 | * Copyright (C) 2004 Fredrik Tolf (fredrik@dolda2000.com) |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by |
7 | * the Free Software Foundation; either version 2 of the License, or |
8 | * (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * GNU General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write to the Free Software |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | */ |
19 | |
20 | /* |
21 | * Note: This code is still ugly, since I copied it almost verbatim |
22 | * from the daemon's parser. It would need serious cleanups, but at |
23 | * least it works for now. |
24 | */ |
25 | |
26 | #ifdef HAVE_CONFIG_H |
27 | #include <config.h> |
28 | #endif |
29 | #include <stdio.h> |
30 | #include <unistd.h> |
31 | #include <stdlib.h> |
32 | #include <string.h> |
33 | #include <iconv.h> |
34 | #include <wchar.h> |
35 | #include <wctype.h> |
36 | #include <errno.h> |
37 | #include <stdarg.h> |
38 | #include <sys/socket.h> |
39 | #include <netinet/in.h> |
40 | #include <arpa/inet.h> |
12383d48 |
41 | #include <sys/un.h> |
d3372da9 |
42 | #include <fcntl.h> |
43 | #include <netdb.h> |
44 | #include <sys/poll.h> |
12383d48 |
45 | #include <pwd.h> |
d3372da9 |
46 | #ifdef HAVE_RESOLVER |
47 | #include <arpa/nameser.h> |
48 | #include <resolv.h> |
49 | #endif |
50 | |
51 | #include <doldaconnect/uilib.h> |
31c700d1 |
52 | #include <utils.h> |
d3372da9 |
53 | |
4d487bad |
54 | #define DOLCON_SRV_NAME "_dolcon._tcp" |
55 | |
d3372da9 |
56 | #define RESP_END -1 |
57 | #define RESP_DSC 0 |
58 | #define RESP_STR 1 |
59 | #define RESP_INT 2 |
60 | #define RESP_FLOAT 3 |
61 | |
62 | struct respclass |
63 | { |
64 | struct respclass *next; |
65 | int code; |
66 | int nwords; |
67 | int *wordt; |
68 | }; |
69 | |
70 | struct command |
71 | { |
72 | struct command *next; |
73 | wchar_t *name; |
74 | struct respclass *classes; |
75 | }; |
76 | |
77 | struct qcmd |
78 | { |
79 | struct qcmd *next; |
80 | struct command *cmd; |
81 | int tag; |
82 | char *buf; |
83 | size_t buflen; |
84 | int (*callback)(struct dc_response *resp); |
85 | void *data; |
86 | }; |
87 | |
88 | void dc_uimisc_disconnected(void); |
89 | |
90 | /* The first command must be the nameless connect command and second |
91 | * the notification command. */ |
92 | static struct command *commands = NULL; |
93 | static struct qcmd *queue = NULL, *queueend = NULL; |
94 | static struct dc_response *respqueue = NULL, *respqueueend = NULL; |
95 | static int state = -1; |
96 | static int fd = -1; |
97 | static iconv_t ichandle; |
98 | static int resetreader = 1; |
d3372da9 |
99 | static struct addrinfo *hostlist = NULL, *curhost = NULL; |
9e5f2b29 |
100 | struct { |
101 | char *hostname; |
102 | int family; |
103 | int sentcreds; |
104 | } servinfo; |
d3372da9 |
105 | |
106 | static struct dc_response *makeresp(void) |
107 | { |
108 | struct dc_response *new; |
109 | |
110 | new = smalloc(sizeof(*new)); |
111 | new->next = NULL; |
112 | new->prev = NULL; |
113 | new->code = 0; |
114 | new->cmdname = NULL; |
115 | new->rlines = NULL; |
116 | new->linessize = 0; |
117 | new->numlines = 0; |
118 | new->curline = 0; |
119 | new->data = NULL; |
120 | return(new); |
121 | } |
122 | |
123 | static void freeqcmd(struct qcmd *qcmd) |
124 | { |
125 | if(qcmd->buf != NULL) |
126 | free(qcmd->buf); |
127 | free(qcmd); |
128 | } |
129 | |
130 | static void unlinkqueue(void) |
131 | { |
132 | struct qcmd *qcmd; |
133 | |
134 | if((qcmd = queue) == NULL) |
135 | return; |
136 | queue = qcmd->next; |
137 | if(queue == NULL) |
138 | queueend = NULL; |
139 | freeqcmd(qcmd); |
140 | } |
141 | |
142 | static struct qcmd *makeqcmd(wchar_t *name) |
143 | { |
144 | struct qcmd *new; |
145 | struct command *cmd; |
146 | static int tag = 0; |
147 | |
148 | if(name == NULL) |
149 | { |
150 | cmd = commands; |
151 | } else { |
152 | for(cmd = commands; cmd != NULL; cmd = cmd->next) |
153 | { |
154 | if((cmd->name != NULL) && !wcscmp(cmd->name, name)) |
155 | break; |
156 | } |
157 | if(cmd == NULL) |
158 | return(NULL); |
159 | } |
160 | new = smalloc(sizeof(*new)); |
161 | new->tag = tag++; |
162 | new->cmd = cmd; |
163 | new->buf = NULL; |
164 | new->buflen = 0; |
165 | new->callback = NULL; |
166 | new->next = NULL; |
167 | new->data = NULL; |
168 | if(queueend == NULL) |
169 | { |
170 | queue = queueend = new; |
171 | } else { |
172 | queueend->next = new; |
173 | queueend = new; |
174 | } |
175 | return(new); |
176 | } |
177 | |
178 | static wchar_t *quoteword(wchar_t *word) |
179 | { |
180 | wchar_t *wp, *buf, *bp; |
181 | int dq, numbs, numc; |
182 | |
183 | dq = 0; |
184 | numbs = 0; |
185 | numc = 0; |
186 | if(*word == L'\0') |
187 | { |
188 | dq = 1; |
189 | } else { |
190 | for(wp = word; *wp != L'\0'; wp++) |
191 | { |
192 | if(!dq && iswspace(*wp)) |
193 | dq = 1; |
194 | if((*wp == L'\\') || (*wp == L'\"')) |
195 | numbs++; |
196 | numc++; |
197 | } |
198 | } |
199 | if(!dq && !numbs) |
200 | return(NULL); |
201 | bp = buf = smalloc(sizeof(wchar_t) * (numc + numbs + (dq?2:0) + 1)); |
202 | if(dq) |
203 | *(bp++) = L'\"'; |
204 | for(wp = word; *wp != L'\0'; wp++) |
205 | { |
206 | if((*wp == L'\\') || (*wp == L'\"')) |
207 | *(bp++) = L'\\'; |
208 | *(bp++) = *wp; |
209 | } |
210 | if(dq) |
211 | *(bp++) = L'\"'; |
212 | *(bp++) = L'\0'; |
213 | return(buf); |
214 | } |
215 | |
216 | static struct command *makecmd(wchar_t *name) |
217 | { |
218 | struct command *new; |
219 | |
220 | new = smalloc(sizeof(*new)); |
221 | new->name = name; |
222 | new->classes = NULL; |
223 | new->next = commands; |
224 | commands = new; |
225 | return(new); |
226 | } |
227 | |
228 | static struct respclass *addresp(struct command *cmd, int code, ...) |
229 | { |
230 | struct respclass *new; |
231 | int i; |
232 | int resps[128]; |
233 | va_list args; |
234 | |
235 | va_start(args, code); |
236 | i = 0; |
237 | while((resps[i++] = va_arg(args, int)) != RESP_END); |
238 | i--; |
239 | va_end(args); |
240 | new = smalloc(sizeof(*new)); |
241 | new->code = code; |
242 | new->nwords = i; |
243 | if(i > 0) |
244 | { |
245 | new->wordt = smalloc(sizeof(int) * i); |
246 | memcpy(new->wordt, resps, sizeof(int) * i); |
247 | } else { |
248 | new->wordt = NULL; |
249 | } |
250 | new->next = cmd->classes; |
251 | cmd->classes = new; |
252 | return(new); |
253 | } |
254 | |
255 | #include "initcmds.h" |
256 | |
257 | int dc_init(void) |
258 | { |
259 | if((ichandle = iconv_open("wchar_t", "utf-8")) == (iconv_t)-1) |
260 | return(-1); |
261 | initcmds(); |
262 | return(0); |
263 | } |
264 | |
265 | void dc_cleanup(void) |
266 | { |
267 | iconv_close(ichandle); |
268 | } |
269 | |
270 | void dc_disconnect(void) |
271 | { |
272 | struct dc_response *resp; |
273 | |
274 | state = -1; |
275 | if(fd >= 0) |
276 | close(fd); |
277 | fd = -1; |
278 | while(queue != NULL) |
279 | unlinkqueue(); |
280 | while((resp = dc_getresp()) != NULL) |
281 | dc_freeresp(resp); |
282 | dc_uimisc_disconnected(); |
9e5f2b29 |
283 | if(servinfo.hostname != NULL) |
284 | free(servinfo.hostname); |
285 | memset(&servinfo, 0, sizeof(servinfo)); |
d3372da9 |
286 | } |
287 | |
288 | void dc_freeresp(struct dc_response *resp) |
289 | { |
290 | int i, o; |
291 | |
292 | for(i = 0; i < resp->numlines; i++) |
293 | { |
294 | for(o = 0; o < resp->rlines[i].argc; o++) |
295 | free(resp->rlines[i].argv[o]); |
296 | free(resp->rlines[i].argv); |
297 | } |
298 | free(resp->rlines); |
299 | free(resp); |
300 | } |
301 | |
302 | struct dc_response *dc_getresp(void) |
303 | { |
304 | struct dc_response *ret; |
305 | |
306 | if((ret = respqueue) == NULL) |
307 | return(NULL); |
308 | respqueue = ret->next; |
309 | if(respqueue == NULL) |
310 | respqueueend = NULL; |
311 | else |
312 | respqueue->prev = NULL; |
313 | return(ret); |
314 | } |
315 | |
316 | struct dc_response *dc_gettaggedresp(int tag) |
317 | { |
318 | struct dc_response *resp; |
319 | |
320 | for(resp = respqueue; resp != NULL; resp = resp->next) |
321 | { |
322 | if(resp->tag == tag) |
323 | { |
324 | if(resp->prev != NULL) |
325 | resp->prev->next = resp->next; |
326 | if(resp->next != NULL) |
327 | resp->next->prev = resp->prev; |
328 | if(resp == respqueue) |
329 | respqueue = resp->next; |
330 | if(resp == respqueueend) |
331 | respqueueend = resp->prev; |
332 | return(resp); |
333 | } |
334 | } |
335 | return(NULL); |
336 | } |
337 | |
338 | struct dc_response *dc_gettaggedrespsync(int tag) |
339 | { |
340 | struct pollfd pfd; |
341 | struct dc_response *resp; |
342 | |
343 | while((resp = dc_gettaggedresp(tag)) == NULL) |
344 | { |
345 | pfd.fd = fd; |
346 | pfd.events = POLLIN; |
347 | if(dc_wantwrite()) |
348 | pfd.events |= POLLOUT; |
349 | if(poll(&pfd, 1, -1) < 0) |
350 | return(NULL); |
351 | if((pfd.revents & POLLIN) && dc_handleread()) |
352 | return(NULL); |
353 | if((pfd.revents & POLLOUT) && dc_handlewrite()) |
354 | return(NULL); |
355 | } |
356 | return(resp); |
357 | } |
358 | |
359 | int dc_wantwrite(void) |
360 | { |
361 | switch(state) |
362 | { |
363 | case 1: |
364 | if((queue != NULL) && (queue->buflen > 0)) |
365 | return(1); |
366 | break; |
367 | } |
368 | return(0); |
369 | } |
370 | |
371 | int dc_getstate(void) |
372 | { |
373 | return(state); |
374 | } |
375 | |
376 | int dc_queuecmd(int (*callback)(struct dc_response *), void *data, ...) |
377 | { |
378 | struct qcmd *qcmd; |
379 | int num, freepart; |
380 | va_list al; |
ccad23d3 |
381 | char *final, *sarg; |
d3372da9 |
382 | wchar_t **toks; |
383 | wchar_t *buf; |
384 | wchar_t *part, *tpart; |
385 | size_t bufsize, bufdata; |
386 | |
387 | buf = NULL; |
388 | bufsize = bufdata = 0; |
389 | num = 0; |
390 | va_start(al, data); |
391 | while((part = va_arg(al, wchar_t *)) != NULL) |
392 | { |
ccad23d3 |
393 | if(!wcscmp(part, L"%a")) |
d3372da9 |
394 | { |
395 | for(toks = va_arg(al, wchar_t **); *toks != NULL; toks++) |
396 | { |
397 | part = *toks; |
398 | freepart = 0; |
399 | if((tpart = quoteword(part)) != NULL) |
400 | { |
401 | freepart = 1; |
402 | part = tpart; |
403 | } |
404 | addtobuf(buf, L' '); |
405 | bufcat(buf, part, wcslen(part)); |
406 | num++; |
407 | if(freepart) |
408 | free(part); |
409 | } |
410 | } else { |
411 | if(*part == L'%') |
412 | { |
ccad23d3 |
413 | tpart = part + 1; |
414 | if(!wcscmp(tpart, L"i")) |
d3372da9 |
415 | { |
ccad23d3 |
416 | freepart = 1; |
417 | part = swprintf2(L"%i", va_arg(al, int)); |
418 | } else if(!wcscmp(tpart, L"s")) { |
419 | freepart = 1; |
420 | part = icmbstowcs(sarg = va_arg(al, char *), NULL); |
421 | if(part == NULL) |
d3372da9 |
422 | { |
ccad23d3 |
423 | if(buf != NULL) |
424 | free(buf); |
425 | return(-1); |
d3372da9 |
426 | } |
ccad23d3 |
427 | } else if(!wcscmp(tpart, L"ls")) { |
428 | part = va_arg(al, wchar_t *); |
429 | } else if(!wcscmp(tpart, L"ll")) { |
430 | freepart = 1; |
431 | part = swprintf2(L"%lli", va_arg(al, long long)); |
432 | } else if(!wcscmp(tpart, L"f")) { |
433 | freepart = 1; |
434 | part = swprintf2(L"%f", va_arg(al, double)); |
435 | } else if(!wcscmp(tpart, L"x")) { |
436 | freepart = 1; |
437 | part = swprintf2(L"%x", va_arg(al, int)); |
438 | } else { |
439 | if(buf != NULL) |
440 | free(buf); |
441 | return(-1); |
d3372da9 |
442 | } |
d3372da9 |
443 | } else { |
444 | freepart = 0; |
445 | } |
446 | if((tpart = quoteword(part)) != NULL) |
447 | { |
448 | if(freepart) |
449 | free(part); |
450 | part = tpart; |
451 | freepart = 1; |
452 | } |
453 | if(num > 0) |
454 | addtobuf(buf, L' '); |
455 | if(num == 0) |
456 | { |
457 | if((qcmd = makeqcmd(part)) == NULL) |
458 | { |
459 | if(freepart) |
460 | free(part); |
461 | if(buf != NULL) |
462 | free(buf); |
463 | return(-1); |
464 | } else { |
465 | qcmd->callback = callback; |
466 | qcmd->data = data; |
467 | } |
468 | } |
469 | bufcat(buf, part, wcslen(part)); |
470 | num++; |
471 | if(freepart) |
472 | free(part); |
473 | } |
474 | } |
475 | bufcat(buf, L"\r\n\0", 3); |
476 | if((final = icwcstombs(buf, "utf-8")) == NULL) |
477 | { |
478 | free(buf); |
479 | return(-1); |
480 | } |
481 | va_end(al); |
482 | free(buf); |
483 | qcmd->buf = final; |
484 | qcmd->buflen = strlen(final); |
485 | return(qcmd->tag); |
486 | } |
487 | |
488 | int dc_handleread(void) |
489 | { |
490 | int ret, done; |
491 | char *p1, *p2; |
492 | size_t len; |
26d72b0d |
493 | socklen_t optlen; |
d3372da9 |
494 | int errnobak; |
495 | /* Ewww... this really is soo ugly. I need to clean this up some day. */ |
496 | static int pstate = 0; |
497 | static char inbuf[128]; |
498 | static size_t inbufdata = 0; |
499 | static wchar_t *cbuf = NULL; |
500 | static size_t cbufsize = 0, cbufdata = 0; |
501 | static wchar_t *pptr = NULL; |
502 | static wchar_t **argv = NULL; |
26d72b0d |
503 | static int argc = 0; |
504 | static size_t args = 0; |
d3372da9 |
505 | static wchar_t *cw = NULL; |
506 | static size_t cwsize = 0, cwdata = 0; |
507 | static struct dc_response *curresp = NULL; |
508 | static int cont = 0; |
509 | static int unlink = 0; |
510 | |
511 | switch(state) |
512 | { |
513 | case -1: |
514 | return(-1); |
515 | case 0: |
26d72b0d |
516 | optlen = sizeof(ret); |
517 | getsockopt(fd, SOL_SOCKET, SO_ERROR, &ret, &optlen); |
d3372da9 |
518 | if(ret) |
519 | { |
520 | int newfd; |
12383d48 |
521 | |
d3372da9 |
522 | for(curhost = curhost->ai_next; curhost != NULL; curhost = curhost->ai_next) |
523 | { |
524 | if((newfd = socket(curhost->ai_family, curhost->ai_socktype, curhost->ai_protocol)) < 0) |
525 | { |
526 | errnobak = errno; |
527 | dc_disconnect(); |
528 | errno = errnobak; |
529 | return(-1); |
530 | } |
531 | dup2(newfd, fd); |
532 | close(newfd); |
533 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
12383d48 |
534 | if(connect(fd, (struct sockaddr *)curhost->ai_addr, curhost->ai_addrlen)) |
d3372da9 |
535 | { |
536 | if(errno == EINPROGRESS) |
537 | return(0); |
538 | } else { |
539 | break; |
540 | } |
541 | } |
542 | if(curhost == NULL) |
543 | { |
544 | dc_disconnect(); |
545 | errno = ret; |
546 | return(-1); |
547 | } |
548 | } |
12383d48 |
549 | if(curhost->ai_canonname != NULL) |
9e5f2b29 |
550 | servinfo.hostname = sstrdup(curhost->ai_canonname); |
551 | servinfo.family = curhost->ai_family; |
d3372da9 |
552 | state = 1; |
553 | resetreader = 1; |
554 | break; |
555 | case 1: |
556 | if(resetreader) |
557 | { |
558 | inbufdata = 0; |
559 | cbufdata = 0; |
560 | pptr = NULL; |
561 | pstate = 0; |
562 | resetreader = 0; |
563 | cont = 0; |
564 | if(curresp != NULL) |
565 | dc_freeresp(curresp); |
566 | curresp = NULL; |
567 | } |
568 | if(inbufdata == 128) |
569 | inbufdata = 0; |
570 | ret = read(fd, inbuf + inbufdata, 128 - inbufdata); |
571 | if(ret < 0) |
572 | { |
573 | if((errno == EAGAIN) || (errno == EINTR)) |
574 | return(0); |
575 | errnobak = errno; |
576 | dc_disconnect(); |
577 | errno = errnobak; |
578 | return(-1); |
579 | } else if(ret == 0) { |
580 | dc_disconnect(); |
581 | errno = 0; |
582 | return(-1); |
583 | } |
584 | inbufdata += ret; |
585 | done = 0; |
586 | while(!done) |
587 | { |
588 | if(cbufsize == cbufdata) |
589 | { |
590 | if(pptr != NULL) |
591 | len = pptr - cbuf; |
592 | if((cbuf = realloc(cbuf, sizeof(wchar_t) * (cbufsize += 256))) == NULL) |
593 | { |
594 | dc_disconnect(); |
595 | errno = ENOMEM; |
596 | return(-1); |
597 | } |
598 | if(pptr != NULL) |
599 | pptr = cbuf + len; |
600 | } |
601 | p1 = inbuf; |
602 | p2 = (char *)(cbuf + cbufdata); |
603 | len = sizeof(wchar_t) * (cbufsize - cbufdata); |
604 | ret = iconv(ichandle, &p1, &inbufdata, &p2, &len); |
605 | memmove(inbuf, p1, inbufdata); |
606 | cbufdata = cbufsize - (len / sizeof(wchar_t)); |
607 | if(ret < 0) |
608 | { |
609 | switch(errno) |
610 | { |
611 | case EILSEQ: |
612 | /* XXX Is this really OK? */ |
613 | inbufdata = 0; |
614 | done = 1; |
615 | break; |
616 | case EINVAL: |
617 | done = 1; |
618 | break; |
619 | case E2BIG: |
620 | break; |
621 | default: |
622 | errnobak = errno; |
623 | dc_disconnect(); |
624 | errno = errnobak; |
625 | return(-1); |
626 | } |
627 | } else { |
628 | done = 1; |
629 | } |
630 | } |
631 | if(pptr == NULL) |
632 | pptr = cbuf; |
633 | done = 0; |
634 | while(!done && (pptr - cbuf < cbufdata)) |
635 | { |
636 | switch(pstate) |
637 | { |
638 | case 0: |
639 | if(iswspace(*pptr)) |
640 | { |
641 | if(*pptr == L'\r') |
642 | { |
643 | if(pptr == cbuf + cbufdata - 1) |
644 | { |
645 | done = 1; |
646 | break; |
647 | } |
648 | if(*(++pptr) == L'\n') |
649 | { |
650 | if(curresp == NULL) |
651 | { |
652 | curresp = makeresp(); |
653 | if((argc > 0) && ((curresp->code = wcstol(argv[0], NULL, 10)) >= 600)) |
654 | { |
655 | curresp->cmdname = L".notify"; |
656 | curresp->internal = commands->next; |
657 | curresp->tag = -1; |
658 | unlink = 0; |
659 | } else { |
660 | if((curresp->cmdname = queue->cmd->name) == NULL) |
661 | curresp->cmdname = L".connect"; |
662 | curresp->data = queue->data; |
663 | curresp->tag = queue->tag; |
664 | curresp->internal = (void *)(queue->cmd); |
665 | unlink = 1; |
666 | } |
667 | } |
668 | sizebuf(&curresp->rlines, &curresp->linessize, curresp->numlines + 1, sizeof(*(curresp->rlines)), 1); |
669 | curresp->rlines[curresp->numlines].argc = argc; |
670 | curresp->rlines[curresp->numlines].argv = argv; |
671 | argv = NULL; |
672 | argc = args = 0; |
673 | curresp->numlines++; |
674 | if(!cont) |
675 | { |
676 | if((curresp->code >= 600) || (queue == NULL) || (queue->callback == NULL)) |
677 | ret = 0; |
678 | else |
679 | ret = queue->callback(curresp); |
680 | if(ret == 0) |
681 | { |
682 | if(respqueue == NULL) |
683 | { |
684 | respqueue = respqueueend = curresp; |
685 | } else { |
686 | curresp->next = NULL; |
687 | curresp->prev = respqueueend; |
688 | respqueueend->next = curresp; |
689 | respqueueend = curresp; |
690 | } |
691 | } else if(ret == 1) { |
692 | dc_freeresp(curresp); |
693 | } |
694 | curresp = NULL; |
695 | if(unlink) |
696 | unlinkqueue(); |
697 | } |
698 | wmemmove(cbuf, pptr, cbufdata -= (pptr - cbuf)); |
699 | pptr = cbuf; |
700 | } else { |
701 | pptr++; |
702 | } |
703 | } else { |
704 | pptr++; |
705 | } |
706 | } else { |
707 | pstate = 1; |
708 | cwdata = 0; |
709 | } |
710 | break; |
711 | case 1: |
712 | if(iswspace(*pptr) || ((argc == 0) && (*pptr == L'-'))) |
713 | { |
714 | if(argc == 0) |
715 | { |
716 | if(*pptr == L'-') |
717 | { |
718 | cont = 1; |
719 | pptr++; |
720 | } else { |
721 | cont = 0; |
722 | } |
723 | } |
724 | addtobuf(cw, L'\0'); |
725 | sizebuf(&argv, &args, argc + 1, sizeof(*argv), 1); |
726 | argv[argc++] = cw; |
727 | cw = NULL; |
728 | cwsize = cwdata = 0; |
729 | pstate = 0; |
730 | } else if(*pptr == L'\"') { |
731 | pstate = 2; |
732 | pptr++; |
733 | } else if(*pptr == L'\\') { |
734 | if(pptr == cbuf + cbufdata - 1) |
735 | { |
736 | done = 1; |
737 | break; |
738 | } |
739 | addtobuf(cw, *(++pptr)); |
740 | pptr++; |
741 | } else { |
742 | addtobuf(cw, *(pptr++)); |
743 | } |
744 | break; |
745 | case 2: |
746 | if(*pptr == L'\"') |
747 | { |
748 | pstate = 1; |
749 | } else if(*pptr == L'\\') { |
750 | addtobuf(cw, *(++pptr)); |
751 | } else { |
752 | addtobuf(cw, *pptr); |
753 | } |
754 | pptr++; |
755 | break; |
756 | } |
757 | } |
758 | break; |
759 | } |
760 | return(0); |
761 | } |
762 | |
9e5f2b29 |
763 | static void mkcreds(struct msghdr *msg) |
764 | { |
765 | struct ucred *ucred; |
766 | static char buf[CMSG_SPACE(sizeof(*ucred))]; |
767 | struct cmsghdr *cmsg; |
768 | |
769 | msg->msg_control = buf; |
770 | msg->msg_controllen = sizeof(buf); |
771 | cmsg = CMSG_FIRSTHDR(msg); |
772 | cmsg->cmsg_level = SOL_SOCKET; |
773 | cmsg->cmsg_type = SCM_CREDENTIALS; |
774 | cmsg->cmsg_len = CMSG_LEN(sizeof(*ucred)); |
775 | ucred = (struct ucred *)CMSG_DATA(cmsg); |
776 | ucred->pid = getpid(); |
777 | ucred->uid = getuid(); |
778 | ucred->gid = getgid(); |
779 | msg->msg_controllen = cmsg->cmsg_len; |
780 | } |
781 | |
d3372da9 |
782 | int dc_handlewrite(void) |
783 | { |
784 | int ret; |
785 | int errnobak; |
9e5f2b29 |
786 | struct msghdr msg; |
787 | struct iovec bufvec; |
d3372da9 |
788 | |
789 | switch(state) |
790 | { |
791 | case 1: |
792 | if(queue->buflen > 0) |
793 | { |
9e5f2b29 |
794 | memset(&msg, 0, sizeof(msg)); |
795 | msg.msg_iov = &bufvec; |
796 | msg.msg_iovlen = 1; |
797 | bufvec.iov_base = queue->buf; |
798 | bufvec.iov_len = queue->buflen; |
799 | if((servinfo.family == PF_UNIX) && !servinfo.sentcreds) |
800 | { |
801 | mkcreds(&msg); |
802 | servinfo.sentcreds = 1; |
803 | } |
804 | ret = sendmsg(fd, &msg, MSG_NOSIGNAL | MSG_DONTWAIT); |
d3372da9 |
805 | if(ret < 0) |
806 | { |
807 | if((errno == EAGAIN) || (errno == EINTR)) |
808 | return(0); |
809 | errnobak = errno; |
810 | dc_disconnect(); |
811 | errno = errnobak; |
812 | return(-1); |
813 | } |
814 | if(ret > 0) |
815 | memmove(queue->buf, queue->buf + ret, queue->buflen -= ret); |
816 | } |
817 | break; |
818 | } |
819 | return(0); |
820 | } |
821 | |
822 | #ifdef HAVE_RESOLVER |
0c58c2a0 |
823 | /* |
824 | * It kind of sucks that libresolv doesn't have any DNS parsing |
825 | * routines. We'll have to do it manually. |
826 | */ |
d3372da9 |
827 | static char *readname(unsigned char *msg, unsigned char *eom, unsigned char **p) |
828 | { |
829 | char *name, *tname; |
830 | unsigned char *tp; |
831 | size_t namesize, namedata, len; |
832 | |
833 | name = NULL; |
834 | namesize = namedata = 0; |
835 | while(1) |
836 | { |
837 | len = *((*p)++); |
838 | if(len == 0) |
839 | { |
840 | addtobuf(name, 0); |
841 | return(name); |
842 | } else if(len == 0xc0) { |
843 | tp = msg + *((*p)++); |
844 | if((tname = readname(msg, eom, &tp)) == NULL) |
845 | { |
846 | if(name != NULL) |
847 | free(name); |
848 | return(NULL); |
849 | } |
850 | bufcat(name, tname, strlen(tname)); |
851 | addtobuf(name, 0); |
852 | free(tname); |
853 | return(name); |
854 | } else if(*p + len >= eom) { |
855 | if(name != NULL) |
856 | free(name); |
857 | return(NULL); |
858 | } |
859 | bufcat(name, *p, len); |
860 | *p += len; |
861 | addtobuf(name, '.'); |
862 | } |
863 | } |
864 | |
865 | static int skipname(unsigned char *msg, unsigned char *eom, unsigned char **p) |
866 | { |
867 | size_t len; |
868 | |
869 | while(1) |
870 | { |
871 | len = *((*p)++); |
872 | if(len == 0) |
873 | { |
874 | return(0); |
875 | } else if(len == 0xc0) { |
876 | (*p)++; |
877 | return(0); |
878 | } else if(*p + len >= eom) { |
879 | return(-1); |
880 | } |
881 | *p += len; |
882 | } |
883 | } |
884 | |
885 | static int getsrvrr(char *name, char **host, int *port) |
886 | { |
887 | int i; |
888 | char *name2, *rrname; |
889 | unsigned char *eom, *p; |
890 | unsigned char buf[1024]; |
891 | int flags, num, class, type; |
892 | size_t len; |
893 | int ret; |
894 | |
895 | if(!(_res.options & RES_INIT)) |
896 | { |
897 | if(res_init() < 0) |
898 | return(-1); |
899 | } |
900 | /* res_querydomain doesn't work for some reason */ |
4d487bad |
901 | if(name[strlen(name) - 1] == '.') |
902 | name2 = sprintf2("%s.%s", DOLCON_SRV_NAME, name); |
903 | else |
904 | name2 = sprintf2("%s.%s.", DOLCON_SRV_NAME, name); |
d3372da9 |
905 | ret = res_query(name2, C_IN, T_SRV, buf, sizeof(buf)); |
906 | if(ret < 0) |
907 | { |
908 | free(name2); |
909 | return(-1); |
910 | } |
911 | eom = buf + ret; |
0c58c2a0 |
912 | /* |
913 | * Assume transaction ID is correct. |
914 | * |
915 | * Flags check: FA0F masks in request/response flag, opcode, |
916 | * truncated flag and status code, and ignores authoritativeness, |
917 | * recursion flags and DNSSEC and reserved bits. |
918 | */ |
d3372da9 |
919 | flags = (buf[2] << 8) + buf[3]; |
920 | if((flags & 0xfa0f) != 0x8000) |
921 | { |
922 | free(name2); |
923 | return(-1); |
924 | } |
0c58c2a0 |
925 | /* Skip the query entries */ |
d3372da9 |
926 | num = (buf[4] << 8) + buf[5]; |
927 | p = buf + 12; |
928 | for(i = 0; i < num; i++) |
929 | { |
930 | if(skipname(buf, eom, &p)) |
931 | { |
932 | free(name2); |
933 | return(-1); |
934 | } |
0c58c2a0 |
935 | p += 4; /* Type and class */ |
d3372da9 |
936 | } |
0c58c2a0 |
937 | /* Parse answers */ |
d3372da9 |
938 | num = (buf[6] << 8) + buf[7]; |
939 | for(i = 0; i < num; i++) |
940 | { |
941 | if((rrname = readname(buf, eom, &p)) == NULL) |
942 | { |
943 | free(name2); |
944 | return(-1); |
945 | } |
946 | type = *(p++) << 8; |
947 | type += *(p++); |
948 | class = *(p++) << 8; |
949 | class += *(p++); |
0c58c2a0 |
950 | p += 4; /* TTL */ |
d3372da9 |
951 | len = *(p++) << 8; |
952 | len += *(p++); |
953 | if((class == C_IN) && (type == T_SRV) && !strcmp(rrname, name2)) |
954 | { |
955 | free(rrname); |
956 | free(name2); |
957 | /* Noone will want to have alternative DC servers, so |
958 | * don't care about priority and weigth */ |
959 | p += 4; |
960 | if(port == NULL) |
961 | { |
962 | p += 2; |
963 | } else { |
964 | *port = *(p++) << 8; |
965 | *port += *(p++); |
966 | } |
967 | if(host != NULL) |
968 | { |
969 | if((rrname = readname(buf, eom, &p)) == NULL) |
970 | return(-1); |
971 | *host = rrname; |
972 | } |
973 | return(0); |
974 | } |
975 | p += len; |
976 | free(rrname); |
977 | } |
978 | free(name2); |
979 | return(-1); |
980 | } |
981 | #else |
982 | static int getsrvrr(char *name, char **host, int *port) |
983 | { |
c4c34936 |
984 | errno = EOPNOTSUPP; |
d3372da9 |
985 | return(-1); |
986 | } |
987 | #endif |
988 | |
12383d48 |
989 | static struct addrinfo *gaicat(struct addrinfo *l1, struct addrinfo *l2) |
d3372da9 |
990 | { |
12383d48 |
991 | struct addrinfo *p; |
992 | |
993 | if(l1 == NULL) |
994 | return(l2); |
995 | for(p = l1; p->ai_next != NULL; p = p->ai_next); |
996 | p->ai_next = l2; |
997 | return(l1); |
998 | } |
999 | |
1000 | /* This isn't actually correct, in any sense of the word. It only |
1001 | * works on systems whose getaddrinfo implementation saves the |
1002 | * sockaddr in the same malloc block as the struct addrinfo. Those |
1003 | * systems include at least FreeBSD and glibc-based systems, though, |
1004 | * so it should not be any immediate threat, and it allows me to not |
1005 | * implement a getaddrinfo wrapper. It can always be changed, should |
1006 | * the need arise. */ |
1007 | static struct addrinfo *unixgai(int type, char *path) |
1008 | { |
1009 | void *buf; |
1010 | struct addrinfo *ai; |
1011 | struct sockaddr_un *un; |
1012 | |
1013 | buf = smalloc(sizeof(*ai) + sizeof(*un)); |
1014 | memset(buf, 0, sizeof(*ai) + sizeof(*un)); |
1015 | ai = (struct addrinfo *)buf; |
1016 | un = (struct sockaddr_un *)(buf + sizeof(*ai)); |
1017 | ai->ai_flags = 0; |
1018 | ai->ai_family = AF_UNIX; |
1019 | ai->ai_socktype = type; |
1020 | ai->ai_protocol = 0; |
1021 | ai->ai_addrlen = sizeof(*un); |
1022 | ai->ai_addr = (struct sockaddr *)un; |
1023 | ai->ai_canonname = NULL; |
1024 | ai->ai_next = NULL; |
1025 | un->sun_family = PF_UNIX; |
1026 | strncpy(un->sun_path, path, sizeof(un->sun_path) - 1); |
1027 | return(ai); |
1028 | } |
1029 | |
1030 | static struct addrinfo *resolvtcp(char *name, int port) |
1031 | { |
1032 | struct addrinfo hint, *ret; |
1033 | char tmp[32]; |
d3372da9 |
1034 | |
d3372da9 |
1035 | memset(&hint, 0, sizeof(hint)); |
1036 | hint.ai_socktype = SOCK_STREAM; |
12383d48 |
1037 | hint.ai_flags = AI_NUMERICSERV | AI_CANONNAME; |
1038 | snprintf(tmp, sizeof(tmp), "%i", port); |
1039 | if(!getaddrinfo(name, tmp, &hint, &ret)) |
1040 | return(ret); |
1041 | return(NULL); |
1042 | } |
1043 | |
1044 | static struct addrinfo *resolvsrv(char *name) |
1045 | { |
1046 | struct addrinfo *ret; |
1047 | char *realname; |
1048 | int port; |
1049 | |
1050 | if(getsrvrr(name, &realname, &port)) |
1051 | return(NULL); |
1052 | ret = resolvtcp(realname, port); |
1053 | free(realname); |
1054 | return(ret); |
1055 | } |
1056 | |
1057 | static struct addrinfo *resolvhost(char *host) |
1058 | { |
1059 | char *p, *hp; |
1060 | struct addrinfo *ret; |
1061 | int port; |
1062 | |
1063 | if(strchr(host, '/')) |
1064 | return(unixgai(SOCK_STREAM, host)); |
1065 | if((strchr(host, ':') == NULL) && ((ret = resolvsrv(host)) != NULL)) |
1066 | return(ret); |
1067 | ret = NULL; |
1068 | if((*host == '[') && ((p = strchr(host, ']')) != NULL)) |
d3372da9 |
1069 | { |
12383d48 |
1070 | hp = memcpy(smalloc(p - host), host + 1, (p - host) - 1); |
1071 | hp[(p - host) - 1] = 0; |
1072 | if(strchr(hp, ':') != NULL) { |
1073 | port = 0; |
1074 | if(*(++p) == ':') |
1075 | port = atoi(p + 1); |
1076 | if(port == 0) |
1077 | port = 1500; |
1078 | ret = resolvtcp(hp, port); |
d3372da9 |
1079 | } |
12383d48 |
1080 | free(hp); |
1081 | } |
1082 | if(ret != NULL) |
1083 | return(ret); |
1084 | hp = sstrdup(host); |
1085 | port = 0; |
1086 | if((p = strrchr(hp, ':')) != NULL) { |
1087 | *(p++) = 0; |
1088 | port = atoi(p); |
1089 | } |
1090 | if(port == 0) |
1091 | port = 1500; |
1092 | ret = resolvtcp(hp, port); |
1093 | free(hp); |
1094 | if(ret != NULL) |
1095 | return(ret); |
1096 | return(NULL); |
1097 | } |
1098 | |
1099 | static struct addrinfo *defaulthost(void) |
1100 | { |
1101 | struct addrinfo *ret; |
1102 | struct passwd *pwd; |
1103 | char *tmp; |
1104 | char dn[1024]; |
1105 | |
1106 | if(((tmp = getenv("DCSERVER")) != NULL) && *tmp) |
1107 | return(resolvhost(tmp)); |
1108 | ret = NULL; |
1109 | if((getuid() != 0) && ((pwd = getpwuid(getuid())) != NULL)) |
1110 | { |
1111 | tmp = sprintf2("/tmp/doldacond-%s", pwd->pw_name); |
1112 | ret = gaicat(ret, unixgai(SOCK_STREAM, tmp)); |
1113 | free(tmp); |
d3372da9 |
1114 | } |
12383d48 |
1115 | ret = gaicat(ret, unixgai(SOCK_STREAM, "/var/run/doldacond.sock")); |
1116 | ret = gaicat(ret, resolvtcp("localhost", 1500)); |
1117 | if(!getdomainname(dn, sizeof(dn)) && *dn && strcmp(dn, "(none)")) |
1118 | ret = gaicat(ret, resolvsrv(dn)); |
1119 | return(ret); |
1120 | } |
1121 | |
1122 | int dc_connect(char *host) |
1123 | { |
1124 | struct qcmd *qcmd; |
1125 | int errnobak; |
1126 | |
1127 | if(fd >= 0) |
1128 | dc_disconnect(); |
1129 | state = -1; |
d3372da9 |
1130 | if(hostlist != NULL) |
1131 | freeaddrinfo(hostlist); |
12383d48 |
1132 | if(!host || !*host) |
1133 | hostlist = defaulthost(); |
1134 | else |
1135 | hostlist = resolvhost(host); |
1136 | if(hostlist == NULL) |
d3372da9 |
1137 | return(-1); |
d3372da9 |
1138 | for(curhost = hostlist; curhost != NULL; curhost = curhost->ai_next) |
1139 | { |
1140 | if((fd = socket(curhost->ai_family, curhost->ai_socktype, curhost->ai_protocol)) < 0) |
1141 | { |
1142 | errnobak = errno; |
d3372da9 |
1143 | errno = errnobak; |
1144 | return(-1); |
1145 | } |
1146 | fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK); |
12383d48 |
1147 | if(connect(fd, (struct sockaddr *)curhost->ai_addr, curhost->ai_addrlen)) |
d3372da9 |
1148 | { |
1149 | if(errno == EINPROGRESS) |
1150 | { |
1151 | state = 0; |
1152 | break; |
1153 | } |
1154 | close(fd); |
1155 | fd = -1; |
1156 | } else { |
12383d48 |
1157 | if(curhost->ai_canonname != NULL) |
9e5f2b29 |
1158 | servinfo.hostname = sstrdup(curhost->ai_canonname); |
1159 | servinfo.family = curhost->ai_family; |
d3372da9 |
1160 | state = 1; |
1161 | break; |
1162 | } |
1163 | } |
1164 | qcmd = makeqcmd(NULL); |
1165 | resetreader = 1; |
d3372da9 |
1166 | return(fd); |
1167 | } |
1168 | |
1169 | struct dc_intresp *dc_interpret(struct dc_response *resp) |
1170 | { |
1171 | int i; |
1172 | struct dc_intresp *iresp; |
1173 | struct command *cmd; |
1174 | struct respclass *cls; |
1175 | int code; |
26d72b0d |
1176 | size_t args; |
d3372da9 |
1177 | |
1178 | if((resp->numlines == 0) || (resp->rlines[0].argc == 0) || (resp->curline >= resp->numlines)) |
1179 | return(NULL); |
1180 | code = wcstol(resp->rlines[0].argv[0], NULL, 10); |
1181 | cmd = (struct command *)(resp->internal); |
1182 | for(cls = cmd->classes; cls != NULL; cls = cls->next) |
1183 | { |
1184 | if(cls->code == code) |
1185 | break; |
1186 | } |
1187 | if(cls == NULL) |
1188 | return(NULL); |
1189 | if(cls->nwords >= resp->rlines[resp->curline].argc) |
1190 | return(NULL); |
1191 | iresp = smalloc(sizeof(*iresp)); |
1192 | iresp->code = code; |
1193 | iresp->argv = NULL; |
1194 | iresp->argc = 0; |
1195 | args = 0; |
1196 | for(i = 0; i < cls->nwords; i++) |
1197 | { |
1198 | switch(cls->wordt[i]) |
1199 | { |
1200 | case RESP_DSC: |
1201 | break; |
1202 | case RESP_STR: |
1203 | sizebuf(&(iresp->argv), &args, iresp->argc + 1, sizeof(*(iresp->argv)), 1); |
1204 | iresp->argv[iresp->argc].val.str = swcsdup(resp->rlines[resp->curline].argv[i + 1]); |
1205 | iresp->argv[iresp->argc].type = cls->wordt[i]; |
1206 | iresp->argc++; |
1207 | break; |
1208 | case RESP_INT: |
1209 | sizebuf(&(iresp->argv), &args, iresp->argc + 1, sizeof(*(iresp->argv)), 1); |
1210 | iresp->argv[iresp->argc].val.num = wcstol(resp->rlines[resp->curline].argv[i + 1], NULL, 0); |
1211 | iresp->argv[iresp->argc].type = cls->wordt[i]; |
1212 | iresp->argc++; |
1213 | break; |
1214 | case RESP_FLOAT: |
1215 | sizebuf(&(iresp->argv), &args, iresp->argc + 1, sizeof(*(iresp->argv)), 1); |
1216 | iresp->argv[iresp->argc].val.flnum = wcstod(resp->rlines[resp->curline].argv[i + 1], NULL); |
1217 | iresp->argv[iresp->argc].type = cls->wordt[i]; |
1218 | iresp->argc++; |
1219 | break; |
1220 | } |
1221 | } |
1222 | resp->curline++; |
1223 | return(iresp); |
1224 | } |
1225 | |
1226 | void dc_freeires(struct dc_intresp *ires) |
1227 | { |
1228 | int i; |
1229 | |
1230 | for(i = 0; i < ires->argc; i++) |
1231 | { |
1232 | if(ires->argv[i].type == RESP_STR) |
1233 | free(ires->argv[i].val.str); |
1234 | } |
1235 | free(ires->argv); |
1236 | free(ires); |
1237 | } |
1238 | |
9a0ef8e1 |
1239 | int dc_checkprotocol(struct dc_response *resp, int revision) |
1240 | { |
1241 | struct dc_intresp *ires; |
1242 | int low, high; |
1243 | |
1244 | if(resp->code != 201) |
1245 | return(-1); |
1246 | resp->curline = 0; |
1247 | if((ires = dc_interpret(resp)) == NULL) |
1248 | return(-1); |
1249 | low = ires->argv[0].val.num; |
1250 | high = ires->argv[0].val.num; |
1251 | dc_freeires(ires); |
1252 | if((revision < low) || (revision > high)) |
1253 | return(-1); |
1254 | return(0); |
1255 | } |
1256 | |
d3372da9 |
1257 | const char *dc_gethostname(void) |
1258 | { |
9e5f2b29 |
1259 | return(servinfo.hostname); |
d3372da9 |
1260 | } |