/[cvs]/eggdrop1.9/src/dccutil.c
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Contents of /eggdrop1.9/src/dccutil.c

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Revision 1.58 - (show annotations) (download) (as text)
Sat Jan 18 22:36:52 2003 UTC (16 years, 9 months ago) by wcc
Branch: MAIN
Changes since 1.57: +10 -1 lines
File MIME type: text/x-chdr
* Synch 1.6: nickbind, unixtime_incr, transfer-close, logblocking.

1 /*
2 * dccutil.c --
3 *
4 * lots of little functions to send formatted text to
5 * varying types of connections
6 * '.who', '.whom', and '.dccstat' code
7 * memory management for dcc structures
8 * timeout checking for dcc connections
9 */
10 /*
11 * Copyright (C) 1997 Robey Pointer
12 * Copyright (C) 1999, 2000, 2001, 2002, 2003 Eggheads Development Team
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version 2
17 * of the License, or (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 */
28
29 #ifndef lint
30 static const char rcsid[] = "$Id: dccutil.c,v 1.57 2003/01/02 21:33:16 wcc Exp $";
31 #endif
32
33 #include <sys/stat.h>
34 #include "main.h"
35 #include <errno.h>
36 #include "chan.h"
37 #include "modules.h"
38 #include "logfile.h"
39 #include "misc.h"
40 #include "cmdt.h" /* cmd_t */
41 #include "net.h" /* tputs, killsock */
42 #include "dccutil.h" /* prototypes */
43 #include "users.h" /* get_user_by_handle */
44
45 extern struct dcc_t *dcc;
46 extern struct userrec *userlist;
47 extern int dcc_total, max_dcc, dcc_flood_thr, backgrd, MAXSOCKS;
48 extern char spaces[], version[];
49 extern time_t now;
50 extern sock_list *socklist;
51
52 #ifndef MAKING_MODS
53 extern struct dcc_table DCC_CHAT, DCC_LOST;
54 #endif /* MAKING_MODS */
55
56 char botnetnick[HANDLEN + 1] = "";
57 char motdfile[121] = "text/motd"; /* File where the motd is stored */
58 int connect_timeout = 15; /* How long to wait before a telnet
59 connection times out */
60
61 int reserved_port_min = 0;
62 int reserved_port_max = 0;
63
64 void init_dcc_max(int newmax)
65 {
66 int osock = MAXSOCKS;
67
68 if (newmax < 1) newmax = 1;
69 dcc = realloc(dcc, sizeof(struct dcc_t) * newmax);
70 if (newmax > max_dcc) memset(dcc+max_dcc, 0, (newmax-max_dcc) * sizeof(*dcc));
71
72 MAXSOCKS = newmax + 10;
73 socklist = (sock_list *)realloc(socklist, sizeof(sock_list) * MAXSOCKS);
74 if (newmax > max_dcc) memset(socklist+max_dcc+10, 0, (newmax-max_dcc) * sizeof(*socklist));
75
76 for (; osock < MAXSOCKS; osock++)
77 socklist[osock].flags = SOCK_UNUSED;
78
79 max_dcc = newmax;
80 }
81
82
83 /* Replace \n with \r\n */
84 char *add_cr(char *buf)
85 {
86 static char WBUF[1024];
87 char *p, *q;
88
89 for (p = buf, q = WBUF; *p; p++, q++) {
90 if (*p == '\n')
91 *q++ = '\r';
92 *q = *p;
93 }
94 *q = *p;
95 return WBUF;
96 }
97
98 extern void (*qserver) (int, char *, int);
99
100 void dprintf EGG_VARARGS_DEF(int, arg1)
101 {
102 static char buf[1024];
103 char *format;
104 int idx, len;
105 va_list va;
106
107 idx = EGG_VARARGS_START(int, arg1, va);
108 format = va_arg(va, char *);
109 len = vsnprintf(buf, 1023, format, va);
110 va_end(va);
111 if (len < 0 || len >= sizeof(buf)) len = sizeof(buf)-1;
112 buf[len] = 0;
113
114 if (idx < 0) {
115 tputs(-idx, buf, len);
116 } else if (idx > 0x7FF0) {
117 switch (idx) {
118 case DP_LOG:
119 putlog(LOG_MISC, "*", "%s", buf);
120 break;
121 case DP_STDOUT:
122 tputs(STDOUT, buf, len);
123 break;
124 case DP_STDERR:
125 tputs(STDERR, buf, len);
126 break;
127 case DP_SERVER:
128 case DP_HELP:
129 case DP_MODE:
130 case DP_MODE_NEXT:
131 case DP_SERVER_NEXT:
132 case DP_HELP_NEXT:
133 qserver(idx, buf, len);
134 break;
135 }
136 return;
137 } else {
138 if (len > 500) { /* Truncate to fit */
139 buf[500] = 0;
140 strcat(buf, "\n");
141 len = 501;
142 }
143 if (dcc[idx].type && ((long) (dcc[idx].type->output) == 1)) {
144 char *p = add_cr(buf);
145
146 tputs(dcc[idx].sock, p, strlen(p));
147 } else if (dcc[idx].type && dcc[idx].type->output) {
148 dcc[idx].type->output(idx, buf, dcc[idx].u.other);
149 } else
150 tputs(dcc[idx].sock, buf, len);
151 }
152 }
153
154 void chatout EGG_VARARGS_DEF(char *, arg1)
155 {
156 int i, len;
157 char *format;
158 char s[601];
159 va_list va;
160
161 format = EGG_VARARGS_START(char *, arg1, va);
162 vsnprintf(s, 511, format, va);
163 va_end(va);
164 len = strlen(s);
165 if (len > 511)
166 len = 511;
167 s[len + 1] = 0;
168
169 for (i = 0; i < dcc_total; i++)
170 if (dcc[i].type == &DCC_CHAT)
171 if (dcc[i].u.chat->channel >= 0)
172 dprintf(i, "%s", s);
173
174 }
175
176 /* Print to all on this channel but one.
177 */
178 void chanout_but EGG_VARARGS_DEF(int, arg1)
179 {
180 int i, x, chan, len;
181 char *format;
182 char s[601];
183 va_list va;
184
185 x = EGG_VARARGS_START(int, arg1, va);
186 chan = va_arg(va, int);
187 format = va_arg(va, char *);
188 vsnprintf(s, 511, format, va);
189 va_end(va);
190 len = strlen(s);
191 if (len > 511)
192 len = 511;
193 s[len + 1] = 0;
194
195 for (i = 0; i < dcc_total; i++)
196 if ((dcc[i].type == &DCC_CHAT) && (i != x))
197 if (dcc[i].u.chat->channel == chan)
198 dprintf(i, "%s", s);
199
200 }
201
202 void dcc_chatter(int idx)
203 {
204 int i, j;
205 struct flag_record fr = {FR_GLOBAL | FR_CHAN | FR_ANYWH, 0, 0, 0, 0, 0};
206
207 get_user_flagrec(dcc[idx].user, &fr, NULL);
208 show_motd(idx);
209 i = dcc[idx].u.chat->channel;
210 dcc[idx].u.chat->channel = 234567;
211 j = dcc[idx].sock;
212 strcpy(dcc[idx].u.chat->con_chan, "***");
213 /* Still there? */
214 if ((idx >= dcc_total) || (dcc[idx].sock != j))
215 return; /* Nope */
216 /* Tcl script may have taken control */
217 if (dcc[idx].type == &DCC_CHAT) {
218 if (!strcmp(dcc[idx].u.chat->con_chan, "***"))
219 strcpy(dcc[idx].u.chat->con_chan, "*");
220 if (dcc[idx].u.chat->channel == 234567) {
221 /* If the chat channel has already been altered it's *highly*
222 * probably join/part messages have been broadcast everywhere,
223 * so dont bother sending them
224 */
225 if (i == -2)
226 i = 0;
227 dcc[idx].u.chat->channel = i;
228 }
229 /* But *do* bother with sending it locally */
230 if (!dcc[idx].u.chat->channel) {
231 chanout_but(-1, 0, "*** %s joined the party line.\n", dcc[idx].nick);
232 } else if (dcc[idx].u.chat->channel > 0) {
233 chanout_but(-1, dcc[idx].u.chat->channel,
234 "*** %s joined the channel.\n", dcc[idx].nick);
235 }
236 }
237 }
238
239 /* Closes an open FD for transfer sockets. */
240 void killtransfer(int n)
241 {
242 if (dcc[n].u.xfer->f) {
243 fclose(dcc[n].u.xfer->f);
244 dcc[n].u.xfer->f = NULL;
245 }
246 }
247
248 /* Mark an entry as lost and deconstruct it's contents. It will be securely
249 * removed from the dcc list in the main loop.
250 */
251 void lostdcc(int n)
252 {
253 /* Make sure it's a valid dcc index. */
254 if (n < 0 || n >= max_dcc) return;
255
256 if (dcc[n].type && dcc[n].type->kill)
257 dcc[n].type->kill(n, dcc[n].u.other);
258 else if (dcc[n].u.other)
259 free(dcc[n].u.other);
260 memset(&dcc[n], 0, sizeof(struct dcc_t));
261
262 dcc[n].sock = (-1);
263 dcc[n].type = &DCC_LOST;
264 }
265
266 /* Remove entry from dcc list. Think twice before using this function,
267 * because it invalidates any variables that point to a specific dcc
268 * entry!
269 *
270 * Note: The entry will be deconstructed if it was not deconstructed
271 * already. This case should normally not occur.
272 */
273 static void removedcc(int n)
274 {
275 if (dcc[n].type && dcc[n].type->kill)
276 dcc[n].type->kill(n, dcc[n].u.other);
277 else if (dcc[n].u.other)
278 free(dcc[n].u.other);
279
280 /* if we are removing the last entry let's decrease dcc_total */
281 if(n + 1 == dcc_total) dcc_total--;
282
283 memset(&dcc[n], 0, sizeof(struct dcc_t)); /* drummer */
284 }
285
286 /* Clean up sockets that were just left for dead.
287 */
288 void dcc_remove_lost(void)
289 {
290 int i;
291
292
293 for (i = dcc_total; i > 0; --i) {
294 if (dcc[i].type == &DCC_LOST) {
295 dcc[i].type = NULL;
296 removedcc(i);
297 }
298 }
299 }
300
301 /* Show list of current dcc's to a dcc-chatter
302 * positive value: idx given -- negative value: sock given
303 */
304 void tell_dcc(int zidx)
305 {
306 int i, j, k;
307 char other[160];
308
309 spaces[HANDLEN - 9] = 0;
310 dprintf(zidx, "SOCK PORT NICK %s HOST TYPE\n"
311 ,spaces);
312 dprintf(zidx, "---- ----- ---------%s -------------------------- ----\n"
313 ,spaces);
314 spaces[HANDLEN - 9] = ' ';
315 /* Show server */
316 for (i = 0; i < dcc_total; i++) {
317 if (!dcc[i].type) continue;
318 j = strlen(dcc[i].host);
319 if (j > 26)
320 j -= 26;
321 else
322 j = 0;
323 if (dcc[i].type && dcc[i].type->display)
324 dcc[i].type->display(i, other);
325 else {
326 sprintf(other, "?:%lX !! ERROR !!", (long) dcc[i].type);
327 break;
328 }
329 k = HANDLEN - strlen(dcc[i].nick);
330 spaces[k] = 0;
331 dprintf(zidx, "%-4d %5d %s%s %-26s %s\n", i,
332 dcc[i].port, dcc[i].nick, spaces, dcc[i].host + j, other);
333 spaces[k] = ' ';
334 }
335 }
336
337 /* Mark someone on dcc chat as no longer away
338 */
339 void not_away(int idx)
340 {
341 if (dcc[idx].u.chat->away == NULL) {
342 dprintf(idx, "You weren't away!\n");
343 return;
344 }
345 if (dcc[idx].u.chat->channel >= 0) {
346 chanout_but(-1, dcc[idx].u.chat->channel,
347 "*** %s is no longer away.\n", dcc[idx].nick);
348 }
349 dprintf(idx, "You're not away any more.\n");
350 free_null(dcc[idx].u.chat->away);
351 }
352
353 void set_away(int idx, char *s)
354 {
355 if (s == NULL) {
356 not_away(idx);
357 return;
358 }
359 if (!s[0]) {
360 not_away(idx);
361 return;
362 }
363 if (dcc[idx].u.chat->away != NULL)
364 free(dcc[idx].u.chat->away);
365 dcc[idx].u.chat->away = strdup(s);
366 if (dcc[idx].u.chat->channel >= 0) {
367 chanout_but(-1, dcc[idx].u.chat->channel,
368 "*** %s is now away: %s\n", dcc[idx].nick, s);
369 }
370 dprintf(idx, "You are now away.\n");
371 }
372
373 /* Make a password, 10-15 random letters and digits
374 */
375 void makepass(char *s)
376 {
377 int i;
378
379 i = 10 + (random() % 6);
380 make_rand_str(s, i);
381 }
382
383 void flush_lines(int idx, struct chat_info *ci)
384 {
385 int c = ci->line_count;
386 struct msgq *p = ci->buffer, *o;
387
388 while (p && c < (ci->max_line)) {
389 ci->current_lines--;
390 tputs(dcc[idx].sock, p->msg, p->len);
391 free(p->msg);
392 o = p->next;
393 free(p);
394 p = o;
395 c++;
396 }
397 if (p != NULL) {
398 if (dcc[idx].status & STAT_TELNET)
399 tputs(dcc[idx].sock, "[More]: ", 8);
400 else
401 tputs(dcc[idx].sock, "[More]\n", 7);
402 }
403 ci->buffer = p;
404 ci->line_count = 0;
405 }
406
407 int new_dcc(struct dcc_table *type, int xtra_size)
408 {
409 int i = dcc_total;
410
411 for (i = 0; i < dcc_total; i++)
412 if (!dcc[i].type) break;
413
414 if (i == max_dcc)
415 return -1;
416
417 if (i == dcc_total)
418 dcc_total++;
419 memset(&dcc[i], 0, sizeof(*dcc));
420
421 dcc[i].type = type;
422 if (xtra_size)
423 dcc[i].u.other = calloc(1, xtra_size);
424 return i;
425 }
426
427 /* Changes the given dcc entry to another type.
428 */
429 void changeover_dcc(int i, struct dcc_table *type, int xtra_size)
430 {
431 /* Free old structure. */
432 if (dcc[i].type && dcc[i].type->kill)
433 dcc[i].type->kill(i, dcc[i].u.other);
434 else if (dcc[i].u.other)
435 free_null(dcc[i].u.other);
436
437 dcc[i].type = type;
438 if (xtra_size)
439 dcc[i].u.other = calloc(1, xtra_size);
440 }
441
442 int detect_dcc_flood(time_t * timer, struct chat_info *chat, int idx)
443 {
444 time_t t;
445
446 if (!dcc_flood_thr)
447 return 0;
448 t = now;
449 if (*timer != t) {
450 *timer = t;
451 chat->msgs_per_sec = 0;
452 } else {
453 chat->msgs_per_sec++;
454 if (chat->msgs_per_sec > dcc_flood_thr) {
455 /* FLOOD */
456 dprintf(idx, "*** FLOOD: %s.\n", _("Goodbye"));
457 /* Evil assumption here that flags&DCT_CHAT implies chat type */
458 if ((dcc[idx].type->flags & DCT_CHAT) && chat &&
459 (chat->channel >= 0)) {
460 char x[1024];
461
462 snprintf(x, sizeof x, _("%s has been forcibly removed for flooding.\n"), dcc[idx].nick);
463 chanout_but(idx, chat->channel, "*** %s", x);
464 }
465 if ((dcc[idx].sock != STDOUT) || backgrd) {
466 killsock(dcc[idx].sock);
467 lostdcc(idx);
468 } else {
469 dprintf(DP_STDOUT, "\n### SIMULATION RESET ###\n\n");
470 dcc_chatter(idx);
471 }
472 return 1; /* <- flood */
473 }
474 }
475 return 0;
476 }
477
478 /* Handle someone being booted from dcc chat.
479 */
480 void do_boot(int idx, char *by, char *reason)
481 {
482 int files = (dcc[idx].type != &DCC_CHAT);
483
484 dprintf(idx, _("-=- poof -=-\n"));
485 dprintf(idx, _("Youve been booted from the %s by %s%s%s\n"), files ? "file section" : "bot",
486 by, reason[0] ? ": " : ".", reason);
487 /* If it's a partyliner (chatterer :) */
488 /* Horrible assumption that DCT_CHAT using structure uses same format
489 * as DCC_CHAT */
490 if ((dcc[idx].type->flags & DCT_CHAT) &&
491 (dcc[idx].u.chat->channel >= 0)) {
492 char x[1024];
493
494 snprintf(x, sizeof x, _("%s booted %s from the party line%s%s\n"), by, dcc[idx].nick,
495 reason[0] ? ": " : "", reason);
496 chanout_but(idx, dcc[idx].u.chat->channel, "*** %s.\n", x);
497 }
498 if ((dcc[idx].sock != STDOUT) || backgrd) {
499 killsock(dcc[idx].sock);
500 lostdcc(idx);
501 /* Entry must remain in the table so it can be logged by the caller */
502 } else {
503 dprintf(DP_STDOUT, "\n### SIMULATION RESET\n\n");
504 dcc_chatter(idx);
505 }
506 return;
507 }
508
509 int add_note(char *to, char *from, char *msg, int idx, int echo)
510 {
511 int status, i, iaway, sock;
512 char ss[81], ssf[81];
513 struct userrec *u;
514
515 if (strlen(msg) > 450)
516 msg[450] = 0; /* Notes have a limit */
517 /* note length + PRIVMSG header + nickname + date must be <512 */
518 /* Might be form "sock:nick" */
519 splitc(ssf, from, ':');
520 rmspace(ssf);
521 splitc(ss, to, ':');
522 rmspace(ss);
523 if (!ss[0])
524 sock = (-1);
525 else
526 sock = atoi(ss);
527 /* Don't process if there's a note binding for it */
528 if (idx != (-2)) { /* Notes from bots don't trigger it */
529 }
530 if (!(u = get_user_by_handle(userlist, to))) {
531 if (idx >= 0)
532 dprintf(idx, _("I dont know anyone by that name.\n"));
533 return NOTE_ERROR;
534 }
535 if (is_bot(u)) {
536 if (idx >= 0)
537 dprintf(idx, _("Thats a bot. You cant leave notes for a bot.\n"));
538 return NOTE_ERROR;
539 }
540 if (match_noterej(u, from)) {
541 if (idx >= 0)
542 dprintf(idx, "%s %s\n", u->handle, "rejected your note.");
543 return NOTE_REJECT;
544 }
545 status = NOTE_STORED;
546 iaway = 0;
547 /* Online right now? */
548 for (i = 0; i < dcc_total; i++) {
549 if (dcc[i].type && (dcc[i].type->flags & DCT_GETNOTES) &&
550 ((sock == (-1)) || (sock == dcc[i].sock)) &&
551 (!strcasecmp(dcc[i].nick, to))) {
552 int aok = 1;
553
554 if (dcc[i].type == &DCC_CHAT)
555 if ((dcc[i].u.chat->away != NULL) &&
556 (idx != (-2))) {
557 /* Only check away if it's not from a bot */
558 aok = 0;
559 if (idx >= 0)
560 dprintf(idx, "%s %s: %s\n", dcc[i].nick, _("is away"),
561 dcc[i].u.chat->away);
562 if (!iaway)
563 iaway = i;
564 status = NOTE_AWAY;
565 }
566 if (aok) {
567 char *p, *fr = from;
568 int l = 0;
569 char work[1024];
570
571 while ((*msg == '<') || (*msg == '>')) {
572 p = newsplit(&msg);
573 if (*p == '<')
574 l += simple_sprintf(work + l, "via %s, ", p + 1);
575 else if (*from == '@')
576 fr = p + 1;
577 }
578 if (idx == -2 || (!strcasecmp(from, botnetnick)))
579 dprintf(i, "*** [%s] %s%s\n", fr, l ? work : "", msg);
580 else
581 dprintf(i, "%cNote [%s]: %s%s\n", 7, fr, l ? work : "", msg);
582 if ((idx >= 0) && (echo))
583 dprintf(idx, "-> %s: %s\n", to, msg);
584 return NOTE_OK;
585 }
586 }
587 }
588 if (idx == (-2))
589 return NOTE_OK; /* Error msg from a tandembot: don't store */
590 status = storenote(from, to, msg, idx, NULL, 0);
591 if (status < 0) status = NOTE_ERROR;
592 else if (status == NOTE_AWAY) {
593 /* User is away in all sessions -- just notify the user that a
594 * message arrived and was stored. (only oldest session is notified.)
595 */
596 dprintf(iaway, "*** %s.\n", _("Note arrived for you"));
597 }
598 return(status);
599 }

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