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d3372da9 | 1 | /* |
2 | * Dolda Connect - Modular multiuser Direct Connect-style client | |
302a2600 | 3 | * Copyright (C) 2004 Fredrik Tolf <fredrik@dolda2000.com> |
d3372da9 | 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 | #include <string.h> | |
20 | #include <wchar.h> | |
21 | #include <sys/socket.h> | |
22 | #include <errno.h> | |
23 | ||
24 | #ifdef HAVE_CONFIG_H | |
25 | #include <config.h> | |
26 | #endif | |
27 | #include "filenet.h" | |
28 | #include "search.h" | |
29 | #include "module.h" | |
30 | #include "utils.h" | |
31 | #include "net.h" | |
32 | ||
33 | static struct fnet *networks = NULL; | |
34 | struct fnetnode *fnetnodes = NULL; | |
35 | int numfnetnodes = 0; | |
36 | GCBCHAIN(newfncb, struct fnetnode *); | |
37 | ||
38 | static struct fnetnode *newfn(struct fnet *fnet) | |
39 | { | |
40 | static int curid = 0; | |
41 | struct fnetnode *new; | |
42 | ||
43 | new = smalloc(sizeof(*new)); | |
44 | memset(new, 0, sizeof(*new)); | |
45 | new->fnet = fnet; | |
46 | new->refcount = 1; | |
47 | new->id = curid++; | |
48 | new->mynick = swcsdup(confgetstr("cli", "defnick")); | |
49 | new->srchwait = confgetint("fnet", "srchwait"); | |
50 | new->state = FNN_SYN; | |
51 | CBCHAININIT(new, fnetnode_ac); | |
52 | CBCHAININIT(new, fnetnode_chat); | |
53 | CBCHAININIT(new, fnetnode_unlink); | |
54 | CBCHAININIT(new, fnetnode_destroy); | |
d9c95ea0 | 55 | CBCHAININIT(new, fnetpeer_new); |
56 | CBCHAININIT(new, fnetpeer_del); | |
57 | CBCHAININIT(new, fnetpeer_chdi); | |
d3372da9 | 58 | new->next = NULL; |
59 | new->prev = NULL; | |
60 | numfnetnodes++; | |
61 | return(new); | |
62 | } | |
63 | ||
64 | void killfnetnode(struct fnetnode *fn) | |
65 | { | |
66 | fnetsetstate(fn, FNN_DEAD); | |
ffa81d5f FT |
67 | if(fn->connected) |
68 | fn->fnet->kill(fn); | |
d3372da9 | 69 | } |
70 | ||
cab0b442 | 71 | void getfnetnode(struct fnetnode *fn) |
d3372da9 | 72 | { |
73 | fn->refcount++; | |
74 | #ifdef DEBUG | |
75 | fprintf(stderr, "getfnetnode on id %i at %p, refcount=%i\n", fn->id, fn, fn->refcount); | |
76 | #endif | |
77 | } | |
78 | ||
79 | void putfnetnode(struct fnetnode *fn) | |
80 | { | |
81 | struct fnetnode *cur; | |
82 | ||
83 | #ifdef DEBUG | |
84 | fprintf(stderr, "putfnetnode on id %i at %p, refcount=%i\n", fn->id, fn, fn->refcount - 1); | |
85 | #endif | |
86 | if(--fn->refcount) | |
87 | return; | |
88 | for(cur = fnetnodes; cur != NULL; cur = cur->next) | |
89 | { | |
90 | if(cur == fn) | |
91 | flog(LOG_CRIT, "BUG: fnetnode reached refcount 0 while still in list - id %i", fn->id); | |
92 | } | |
93 | CBCHAINDOCB(fn, fnetnode_destroy, fn); | |
94 | CBCHAINFREE(fn, fnetnode_ac); | |
95 | CBCHAINFREE(fn, fnetnode_chat); | |
96 | CBCHAINFREE(fn, fnetnode_unlink); | |
97 | CBCHAINFREE(fn, fnetnode_destroy); | |
d9c95ea0 | 98 | CBCHAINFREE(fn, fnetpeer_new); |
99 | CBCHAINFREE(fn, fnetpeer_del); | |
100 | CBCHAINFREE(fn, fnetpeer_chdi); | |
ffa81d5f | 101 | if((fn->fnet->destroy != NULL) && fn->connected) |
d3372da9 | 102 | fn->fnet->destroy(fn); |
3ea7528f | 103 | while(fn->args != NULL) |
104 | freewcspair(fn->args, &fn->args); | |
d3372da9 | 105 | while(fn->peers != NULL) |
106 | fnetdelpeer(fn->peers); | |
107 | if(fn->mynick != NULL) | |
108 | free(fn->mynick); | |
d1e8b9fd | 109 | if(fn->pubid != NULL) |
110 | free(fn->pubid); | |
d3372da9 | 111 | if(fn->name != NULL) |
112 | free(fn->name); | |
a3a4a3a7 | 113 | if(fn->owner != NULL) |
114 | free(fn->owner); | |
d3372da9 | 115 | free(fn); |
116 | numfnetnodes--; | |
117 | } | |
118 | ||
119 | struct fnetnode *findfnetnode(int id) | |
120 | { | |
121 | struct fnetnode *fn; | |
122 | ||
123 | for(fn = fnetnodes; (fn != NULL) && (fn->id != id); fn = fn->next); | |
124 | return(fn); | |
125 | } | |
126 | ||
127 | void linkfnetnode(struct fnetnode *fn) | |
128 | { | |
129 | if(fn->linked) | |
130 | return; | |
131 | getfnetnode(fn); | |
132 | fn->next = fnetnodes; | |
133 | if(fnetnodes != NULL) | |
134 | fnetnodes->prev = fn; | |
135 | fnetnodes = fn; | |
136 | fn->linked = 1; | |
137 | GCBCHAINDOCB(newfncb, fn); | |
138 | } | |
139 | ||
140 | void unlinkfnetnode(struct fnetnode *fn) | |
141 | { | |
142 | if(!fn->linked) | |
143 | return; | |
144 | if(fnetnodes == fn) | |
145 | fnetnodes = fn->next; | |
146 | if(fn->next != NULL) | |
147 | fn->next->prev = fn->prev; | |
148 | if(fn->prev != NULL) | |
149 | fn->prev->next = fn->next; | |
150 | fn->linked = 0; | |
151 | CBCHAINDOCB(fn, fnetnode_unlink, fn); | |
152 | putfnetnode(fn); | |
153 | } | |
154 | ||
cab0b442 | 155 | static void conncb(struct socket *sk, int err, struct fnetnode *data) |
d3372da9 | 156 | { |
157 | if(err != 0) | |
158 | { | |
159 | killfnetnode(data); | |
160 | putfnetnode(data); | |
cab0b442 | 161 | return; |
d3372da9 | 162 | } |
d3372da9 | 163 | fnetsetstate(data, FNN_HS); |
164 | socksettos(sk, confgetint("fnet", "fntos")); | |
ffa81d5f FT |
165 | data->fnet->connect(data, sk); |
166 | data->connected = 1; | |
d3372da9 | 167 | putfnetnode(data); |
ffa81d5f | 168 | putsock(sk); |
d3372da9 | 169 | } |
170 | ||
171 | static void resolvecb(struct sockaddr *addr, int addrlen, struct fnetnode *data) | |
172 | { | |
173 | if(addr == NULL) | |
174 | { | |
175 | killfnetnode(data); | |
176 | putfnetnode(data); | |
177 | } else { | |
cab0b442 | 178 | netcsconn(addr, addrlen, (void (*)(struct socket *, int, void *))conncb, data); |
d3372da9 | 179 | } |
180 | } | |
181 | ||
182 | static struct fnetpeerdatum *finddatum(struct fnetnode *fn, wchar_t *id) | |
183 | { | |
184 | struct fnetpeerdatum *datum; | |
185 | ||
186 | for(datum = fn->peerdata; datum != NULL; datum = datum->next) | |
187 | { | |
188 | if(!wcscmp(datum->id, id)) | |
189 | break; | |
190 | } | |
191 | return(datum); | |
192 | } | |
193 | ||
194 | static struct fnetpeerdatum *adddatum(struct fnetnode *fn, wchar_t *id, int datatype) | |
195 | { | |
196 | struct fnetpeerdatum *new; | |
197 | ||
198 | new = smalloc(sizeof(*new)); | |
199 | new->refcount = 0; | |
200 | new->id = swcsdup(id); | |
201 | new->datatype = datatype; | |
202 | new->prev = NULL; | |
203 | new->next = fn->peerdata; | |
204 | if(fn->peerdata != NULL) | |
205 | fn->peerdata->prev = new; | |
206 | fn->peerdata = new; | |
207 | return(new); | |
208 | } | |
209 | ||
d9c95ea0 | 210 | static struct fnetpeerdi *difindoradd(struct fnetpeer *peer, struct fnetpeerdatum *datum, int *isnew) |
d3372da9 | 211 | { |
212 | int i; | |
213 | ||
214 | for(i = 0; i < peer->dinum; i++) | |
215 | { | |
216 | if(peer->peerdi[i].datum == datum) | |
217 | break; | |
218 | } | |
219 | if(i >= peer->dinum) | |
220 | { | |
221 | peer->peerdi = srealloc(peer->peerdi, sizeof(struct fnetpeerdi) * (peer->dinum + 1)); | |
222 | memset(&peer->peerdi[peer->dinum], 0, sizeof(struct fnetpeerdi)); | |
223 | peer->peerdi[peer->dinum].datum = datum; | |
224 | datum->refcount++; | |
d9c95ea0 | 225 | if(isnew != NULL) |
226 | *isnew = 1; | |
d3372da9 | 227 | return(&peer->peerdi[peer->dinum++]); |
228 | } else { | |
d9c95ea0 | 229 | if(isnew != NULL) |
230 | *isnew = 0; | |
d3372da9 | 231 | return(&peer->peerdi[i]); |
232 | } | |
233 | } | |
234 | ||
235 | void fnetpeersetstr(struct fnetpeer *peer, wchar_t *id, wchar_t *value) | |
236 | { | |
237 | struct fnetpeerdatum *datum; | |
238 | struct fnetpeerdi *di; | |
d9c95ea0 | 239 | int changed; |
d3372da9 | 240 | |
241 | if((datum = finddatum(peer->fn, id)) == NULL) | |
242 | datum = adddatum(peer->fn, id, FNPD_STR); | |
d9c95ea0 | 243 | di = difindoradd(peer, datum, &changed); |
244 | if(di->data.str != NULL) { | |
378f34d2 | 245 | changed = (changed || wcscmp(value, di->data.str)); |
d3372da9 | 246 | free(di->data.str); |
d9c95ea0 | 247 | } else { |
248 | changed = 1; | |
249 | } | |
d3372da9 | 250 | di->data.str = swcsdup(value); |
d9c95ea0 | 251 | if(changed) |
252 | CBCHAINDOCB(peer->fn, fnetpeer_chdi, peer->fn, peer, di); | |
d3372da9 | 253 | } |
254 | ||
255 | void fnetpeersetnum(struct fnetpeer *peer, wchar_t *id, int value) | |
256 | { | |
257 | struct fnetpeerdatum *datum; | |
258 | struct fnetpeerdi *di; | |
d9c95ea0 | 259 | int changed; |
d3372da9 | 260 | |
261 | if((datum = finddatum(peer->fn, id)) == NULL) | |
262 | datum = adddatum(peer->fn, id, FNPD_INT); | |
d9c95ea0 | 263 | di = difindoradd(peer, datum, &changed); |
264 | changed = (changed || (di->data.num != value)); | |
d3372da9 | 265 | di->data.num = value; |
d9c95ea0 | 266 | if(changed) |
267 | CBCHAINDOCB(peer->fn, fnetpeer_chdi, peer->fn, peer, di); | |
d3372da9 | 268 | } |
269 | ||
270 | void fnetpeersetlnum(struct fnetpeer *peer, wchar_t *id, long long value) | |
271 | { | |
272 | struct fnetpeerdatum *datum; | |
273 | struct fnetpeerdi *di; | |
d9c95ea0 | 274 | int changed; |
d3372da9 | 275 | |
276 | if((datum = finddatum(peer->fn, id)) == NULL) | |
277 | datum = adddatum(peer->fn, id, FNPD_LL); | |
d9c95ea0 | 278 | di = difindoradd(peer, datum, &changed); |
279 | changed = (changed || (di->data.lnum != value)); | |
d3372da9 | 280 | di->data.lnum = value; |
d9c95ea0 | 281 | if(changed) |
282 | CBCHAINDOCB(peer->fn, fnetpeer_chdi, peer->fn, peer, di); | |
d3372da9 | 283 | } |
284 | ||
285 | static void putdatum(struct fnetpeer *peer, struct fnetpeerdatum *datum) | |
286 | { | |
287 | if(--datum->refcount > 0) | |
288 | return; | |
289 | if(datum->next != NULL) | |
290 | datum->next->prev = datum->prev; | |
291 | if(datum->prev != NULL) | |
292 | datum->prev->next = datum->next; | |
293 | if(datum == peer->fn->peerdata) | |
294 | peer->fn->peerdata = datum->next; | |
295 | free(datum->id); | |
296 | free(datum); | |
297 | } | |
298 | ||
299 | void fnetpeerunset(struct fnetpeer *peer, wchar_t *id) | |
300 | { | |
301 | int i; | |
302 | struct fnetpeerdatum *datum; | |
303 | ||
304 | if((datum = finddatum(peer->fn, id)) == NULL) | |
305 | return; | |
306 | for(i = 0; i < peer->dinum; i++) | |
307 | { | |
308 | if(peer->peerdi[i].datum == datum) | |
309 | break; | |
310 | } | |
311 | if(i >= peer->dinum) | |
312 | return; | |
313 | if((datum->datatype == FNPD_STR) && (peer->peerdi[i].data.str != NULL)) | |
314 | free(peer->peerdi[i].data.str); | |
315 | peer->dinum--; | |
316 | memmove(&peer->peerdi[i], &peer->peerdi[i + 1], sizeof(struct fnetpeerdi) * (peer->dinum - i)); | |
317 | putdatum(peer, datum); | |
318 | } | |
319 | ||
320 | struct fnetpeer *fnetaddpeer(struct fnetnode *fn, wchar_t *id, wchar_t *nick) | |
321 | { | |
322 | struct fnetpeer *new; | |
323 | ||
324 | new = smalloc(sizeof(*new)); | |
325 | new->fn = fn; | |
326 | new->id = swcsdup(id); | |
327 | new->nick = swcsdup(nick); | |
328 | new->flags.w = 0; | |
329 | new->dinum = 0; | |
330 | new->peerdi = NULL; | |
331 | new->next = fn->peers; | |
332 | new->prev = NULL; | |
333 | if(fn->peers != NULL) | |
334 | fn->peers->prev = new; | |
335 | fn->peers = new; | |
336 | fn->numpeers++; | |
337 | CBCHAINDOCB(fn, fnetnode_ac, fn, L"numpeers"); | |
d9c95ea0 | 338 | CBCHAINDOCB(fn, fnetpeer_new, fn, new); |
d3372da9 | 339 | return(new); |
340 | } | |
341 | ||
342 | void fnetdelpeer(struct fnetpeer *peer) | |
343 | { | |
344 | int i; | |
345 | ||
346 | if(peer->next != NULL) | |
347 | peer->next->prev = peer->prev; | |
348 | if(peer->prev != NULL) | |
349 | peer->prev->next = peer->next; | |
350 | if(peer->fn->peers == peer) | |
351 | peer->fn->peers = peer->next; | |
352 | peer->fn->numpeers--; | |
353 | CBCHAINDOCB(peer->fn, fnetnode_ac, peer->fn, L"numpeers"); | |
d9c95ea0 | 354 | CBCHAINDOCB(peer->fn, fnetpeer_del, peer->fn, peer); |
d3372da9 | 355 | free(peer->id); |
356 | free(peer->nick); | |
357 | for(i = 0; i < peer->dinum; i++) | |
358 | { | |
359 | if((peer->peerdi[i].datum->datatype == FNPD_STR) && (peer->peerdi[i].data.str != NULL)) | |
360 | free(peer->peerdi[i].data.str); | |
361 | putdatum(peer, peer->peerdi[i].datum); | |
362 | } | |
363 | if(peer->peerdi != NULL) | |
364 | free(peer->peerdi); | |
365 | free(peer); | |
366 | } | |
367 | ||
368 | struct fnetpeer *fnetfindpeer(struct fnetnode *fn, wchar_t *id) | |
369 | { | |
370 | struct fnetpeer *cur; | |
371 | ||
372 | for(cur = fn->peers; (cur != NULL) && wcscmp(cur->id, id); cur = cur->next); | |
373 | return(cur); | |
374 | } | |
375 | ||
376 | int fnetsetnick(struct fnetnode *fn, wchar_t *newnick) | |
377 | { | |
378 | int ret; | |
379 | ||
ffa81d5f | 380 | if((fn->fnet->setnick != NULL) && fn->connected) |
d3372da9 | 381 | ret = fn->fnet->setnick(fn, newnick); |
382 | else | |
383 | ret = 0; | |
384 | if(!ret) | |
385 | { | |
386 | if(fn->mynick != NULL) | |
387 | free(fn->mynick); | |
388 | fn->mynick = swcsdup(newnick); | |
389 | } | |
390 | return(ret); | |
391 | } | |
392 | ||
393 | int fnetsendchat(struct fnetnode *fn, int public, wchar_t *to, wchar_t *string) | |
394 | { | |
ffa81d5f | 395 | if((fn->fnet->sendchat == NULL) || !fn->connected) |
d3372da9 | 396 | { |
397 | errno = ENOTSUP; | |
398 | return(-1); | |
399 | } | |
400 | return(fn->fnet->sendchat(fn, public, to, string)); | |
401 | } | |
402 | ||
403 | int fnetsearch(struct fnetnode *fn, struct search *srch, struct srchfnnlist *ln) | |
404 | { | |
405 | if(fn->fnet->search == NULL) | |
406 | { | |
407 | errno = ENOTSUP; | |
408 | return(-1); | |
409 | } | |
410 | return(fn->fnet->search(fn, srch, ln)); | |
411 | } | |
412 | ||
413 | void fnetsetname(struct fnetnode *fn, wchar_t *newname) | |
414 | { | |
415 | if(fn->name != NULL) | |
416 | free(fn->name); | |
417 | fn->name = swcsdup(newname); | |
418 | CBCHAINDOCB(fn, fnetnode_ac, fn, L"name"); | |
419 | } | |
420 | ||
421 | void fnetsetstate(struct fnetnode *fn, int newstate) | |
422 | { | |
423 | fn->state = newstate; | |
424 | CBCHAINDOCB(fn, fnetnode_ac, fn, L"state"); | |
425 | } | |
426 | ||
427 | struct fnet *findfnet(wchar_t *name) | |
428 | { | |
429 | struct fnet *fnet; | |
430 | ||
431 | for(fnet = networks; fnet != NULL; fnet = fnet->next) | |
432 | { | |
433 | if(!wcscmp(name, fnet->name)) | |
434 | break; | |
435 | } | |
436 | return(fnet); | |
437 | } | |
438 | ||
a3a4a3a7 | 439 | struct fnetnode *fnetinitconnect(wchar_t *name, wchar_t *owner, char *addr, struct wcspair *args) |
d3372da9 | 440 | { |
441 | struct fnet *fnet; | |
442 | struct fnetnode *fn; | |
efc05613 | 443 | struct wcspair *arg; |
d3372da9 | 444 | |
445 | if((fnet = findfnet(name)) == NULL) | |
446 | { | |
447 | errno = EPROTONOSUPPORT; | |
448 | return(NULL); | |
449 | } | |
450 | fn = newfn(fnet); | |
a3a4a3a7 | 451 | fn->owner = swcsdup(owner); |
d1e8b9fd | 452 | fn->pubid = icmbstowcs(addr, NULL); |
453 | if(fn->pubid == NULL) | |
454 | fn->pubid = swcsdup(L""); | |
54771774 | 455 | fn->args = args; |
efc05613 | 456 | for(arg = fn->args; arg != NULL; arg = arg->next) |
457 | { | |
458 | if(!wcscmp(arg->key, L"nick")) | |
459 | fnetsetnick(fn, arg->val); | |
460 | } | |
d3372da9 | 461 | getfnetnode(fn); |
462 | if(netresolve(addr, (void (*)(struct sockaddr *, int, void *))resolvecb, fn) < 0) | |
463 | return(NULL); | |
464 | return(fn); | |
465 | } | |
466 | ||
467 | void regfnet(struct fnet *fnet) | |
468 | { | |
469 | fnet->next = networks; | |
470 | networks = fnet; | |
471 | } | |
472 | ||
473 | /* | |
474 | * Note on the chat string: Must be in UNIX text file format - that | |
475 | * is, LF line endings. The filenet-specific code must see to it that | |
476 | * any other kind of format is converted into that. In the future, | |
477 | * certain control characters and escape sequences will be parsed by | |
478 | * the client. Make sure that any filenet-specific code strips any | |
479 | * such that aren't supposed to be in the protocol. | |
480 | * | |
481 | * Note on "name": This is supposed to be an identifier for the | |
482 | * source. If the chat is a public message, set "public" to non-zero | |
483 | * and "name" to whatever "chat room" name is appropriate for the | |
484 | * fnetnode, but not NULL. If there is a "default" channel in this | |
485 | * filenet, set "name" to the empty string. If the chat is a private | |
486 | * message, name is ignored. | |
487 | */ | |
488 | void fnethandlechat(struct fnetnode *fn, int public, wchar_t *name, wchar_t *peer, wchar_t *chat) | |
489 | { | |
490 | CBCHAINDOCB(fn, fnetnode_chat, fn, public, name, peer, chat); | |
491 | } | |
492 | ||
493 | static struct configvar myvars[] = | |
494 | { | |
d9f89ef5 | 495 | /** The number of seconds to wait between searches. Most hubs |
496 | * require at least ten seconds, and quite often network lag will | |
497 | * often make searches arrive to the hub more often than sent. It | |
498 | * may be semi-dangerous to specify too low a value, since hubs | |
499 | * will often kick users that search too often (even when the | |
500 | * reason is network lag -- there is no way for the hub to know | |
501 | * this), but it is quite annoying to set too high a value. 15 to | |
502 | * 40 seconds are the recommended range (although the default is | |
503 | * 15 seconds, it is recommended to set to 30 seconds). */ | |
d3372da9 | 504 | {CONF_VAR_INT, "srchwait", {.num = 15}}, |
d9f89ef5 | 505 | /** The TOS value to use for hub connections (see the TOS VALUES |
506 | * section). */ | |
d3372da9 | 507 | {CONF_VAR_INT, "fntos", {.num = 0}}, |
d9f89ef5 | 508 | /** The TOS value to use for peer connections (see the TOS VALUES |
509 | * section). */ | |
d3372da9 | 510 | {CONF_VAR_INT, "fnptos", {.num = 0}}, |
d9f89ef5 | 511 | /** Specifies a maximum number of simultaneously connected |
512 | * hubs. Attempts to connect to new hubs beyond this limit will | |
513 | * return an error. Set to zero to remove the limit. */ | |
cd340dab | 514 | {CONF_VAR_INT, "maxnodes", {.num = 0}}, |
d3372da9 | 515 | {CONF_VAR_END} |
516 | }; | |
517 | ||
518 | static struct module me = | |
519 | { | |
520 | .conf = | |
521 | { | |
522 | .vars = myvars | |
523 | }, | |
524 | .name = "fnet" | |
525 | }; | |
526 | ||
527 | MODULE(me) |