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

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Revision 1.49 - (show annotations) (download) (as text)
Sun Apr 28 02:21:07 2002 UTC (17 years, 5 months ago) by ite
Branch: MAIN
Changes since 1.48: +7 -4 lines
File MIME type: text/x-chdr
* Let's increase candidates to be schrienked out from the dcc table.
* Built default for max_dcc is the same to the one in the config file.
* Minor dcc clean up.
* Exporting removedcc() was unneeded and dangerous.

1 /*
2 * dccutil.c -- handles:
3 * lots of little functions to send formatted text to
4 * varying types of connections
5 * '.who', '.whom', and '.dccstat' code
6 * memory management for dcc structures
7 * timeout checking for dcc connections
8 *
9 * $Id: dccutil.c,v 1.48 2002/04/27 18:34:09 stdarg Exp $
10 */
11 /*
12 * Copyright (C) 1997 Robey Pointer
13 * Copyright (C) 1999, 2000, 2001, 2002 Eggheads Development Team
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version 2
18 * of the License, or (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
28 */
29
30 #include <sys/stat.h>
31 #include "main.h"
32 #include <errno.h>
33 #include "chan.h"
34 #include "modules.h"
35 #include "tandem.h"
36 #include "logfile.h"
37 #include "misc.h"
38
39 extern struct dcc_t *dcc;
40 extern int dcc_total, max_dcc, dcc_flood_thr, backgrd, MAXSOCKS;
41 extern char botnetnick[], spaces[], version[];
42 extern time_t now;
43 extern sock_list *socklist;
44
45 char motdfile[121] = "text/motd"; /* File where the motd is stored */
46 int connect_timeout = 15; /* How long to wait before a telnet
47 connection times out */
48
49 int reserved_port_min = 0;
50 int reserved_port_max = 0;
51
52 void init_dcc_max(int newmax)
53 {
54 int osock = MAXSOCKS;
55
56 if (newmax < 1) newmax = 1;
57 dcc = realloc(dcc, sizeof(struct dcc_t) * newmax);
58 if (newmax > max_dcc) memset(dcc+max_dcc, 0, (newmax-max_dcc) * sizeof(*dcc));
59
60 MAXSOCKS = newmax + 10;
61 socklist = (sock_list *)realloc(socklist, sizeof(sock_list) * MAXSOCKS);
62 if (newmax > max_dcc) memset(socklist+max_dcc+10, 0, (newmax-max_dcc) * sizeof(*socklist));
63
64 for (; osock < MAXSOCKS; osock++)
65 socklist[osock].flags = SOCK_UNUSED;
66
67 max_dcc = newmax;
68 }
69
70
71 /* Replace \n with \r\n */
72 char *add_cr(char *buf)
73 {
74 static char WBUF[1024];
75 char *p, *q;
76
77 for (p = buf, q = WBUF; *p; p++, q++) {
78 if (*p == '\n')
79 *q++ = '\r';
80 *q = *p;
81 }
82 *q = *p;
83 return WBUF;
84 }
85
86 extern void (*qserver) (int, char *, int);
87
88 void dprintf EGG_VARARGS_DEF(int, arg1)
89 {
90 static char buf[1024];
91 char *format;
92 int idx, len;
93 va_list va;
94
95 idx = EGG_VARARGS_START(int, arg1, va);
96 format = va_arg(va, char *);
97 vsnprintf(buf, 1023, format, va);
98 va_end(va);
99 /* We can not use the return value vsnprintf() to determine where
100 * to null terminate. The C99 standard specifies that vsnprintf()
101 * shall return the number of bytes that would be written if the
102 * buffer had been large enough, rather then -1.
103 */
104 /* We actually can, since if it's < 0 or >= sizeof(buf), we know it wrote
105 * sizeof(buf) bytes. But we're not doing that anyway.
106 */
107 buf[sizeof(buf)-1] = 0;
108
109 #if (TCL_MAJOR_VERSION >= 8 && TCL_MINOR_VERSION >= 1) || (TCL_MAJOR_VERSION >= 9)
110 str_nutf8tounicode(buf, sizeof buf);
111 #endif
112 len = strlen(buf);
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 check_tcl_chon(dcc[idx].nick, dcc[idx].sock);
214 /* Still there? */
215 if ((idx >= dcc_total) || (dcc[idx].sock != j))
216 return; /* Nope */
217 /* Tcl script may have taken control */
218 if (dcc[idx].type == &DCC_CHAT) {
219 if (!strcmp(dcc[idx].u.chat->con_chan, "***"))
220 strcpy(dcc[idx].u.chat->con_chan, "*");
221 if (dcc[idx].u.chat->channel == 234567) {
222 /* If the chat channel has already been altered it's *highly*
223 * probably join/part messages have been broadcast everywhere,
224 * so dont bother sending them
225 */
226 if (i == -2)
227 i = 0;
228 dcc[idx].u.chat->channel = i;
229 if (dcc[idx].u.chat->channel >= 0) {
230 if (dcc[idx].u.chat->channel < 100000) {
231 botnet_send_join_idx(idx, -1);
232 }
233 }
234 check_tcl_chjn(botnetnick, dcc[idx].nick, dcc[idx].u.chat->channel,
235 geticon(dcc[idx].user), dcc[idx].sock, dcc[idx].host);
236 }
237 /* But *do* bother with sending it locally */
238 if (!dcc[idx].u.chat->channel) {
239 chanout_but(-1, 0, "*** %s joined the party line.\n", dcc[idx].nick);
240 } else if (dcc[idx].u.chat->channel > 0) {
241 chanout_but(-1, dcc[idx].u.chat->channel,
242 "*** %s joined the channel.\n", dcc[idx].nick);
243 }
244 }
245 }
246
247 /* Mark an entry as lost and deconstruct it's contents. It will be securely
248 * removed from the dcc list in the main loop.
249 */
250 void lostdcc(int n)
251 {
252 /* Make sure it's a valid dcc index. */
253 if (n < 0 || n >= max_dcc) return;
254
255 if (dcc[n].type && dcc[n].type->kill)
256 dcc[n].type->kill(n, dcc[n].u.other);
257 else if (dcc[n].u.other)
258 free(dcc[n].u.other);
259 memset(&dcc[n], 0, sizeof(struct dcc_t));
260
261 dcc[n].sock = (-1);
262 dcc[n].type = &DCC_LOST;
263 }
264
265 /* Remove entry from dcc list. Think twice before using this function,
266 * because it invalidates any variables that point to a specific dcc
267 * entry!
268 *
269 * Note: The entry will be deconstructed if it was not deconstructed
270 * already. This case should normally not occur.
271 */
272 static void removedcc(int n)
273 {
274 if (dcc[n].type && dcc[n].type->kill)
275 dcc[n].type->kill(n, dcc[n].u.other);
276 else if (dcc[n].u.other)
277 free(dcc[n].u.other);
278
279 /* if we are removing the last entry let's decrease dcc_total */
280 if(n + 1 == dcc_total) dcc_total--;
281
282 memset(&dcc[n], 0, sizeof(struct dcc_t)); /* drummer */
283 }
284
285 /* Clean up sockets that were just left for dead.
286 */
287 void dcc_remove_lost(void)
288 {
289 int i;
290
291
292 for (i = dcc_total; i > 0; --i) {
293 if (dcc[i].type == &DCC_LOST) {
294 dcc[i].type = NULL;
295 removedcc(i);
296 }
297 }
298 }
299
300 /* Show list of current dcc's to a dcc-chatter
301 * positive value: idx given -- negative value: sock given
302 */
303 void tell_dcc(int zidx)
304 {
305 int i, j, k;
306 char other[160];
307
308 spaces[HANDLEN - 9] = 0;
309 dprintf(zidx, "SOCK PORT NICK %s HOST TYPE\n"
310 ,spaces);
311 dprintf(zidx, "---- ----- ---------%s -------------------------- ----\n"
312 ,spaces);
313 spaces[HANDLEN - 9] = ' ';
314 /* Show server */
315 for (i = 0; i < dcc_total; i++) {
316 if (!dcc[i].type) continue;
317 j = strlen(dcc[i].host);
318 if (j > 26)
319 j -= 26;
320 else
321 j = 0;
322 if (dcc[i].type && dcc[i].type->display)
323 dcc[i].type->display(i, other);
324 else {
325 sprintf(other, "?:%lX !! ERROR !!", (long) dcc[i].type);
326 break;
327 }
328 k = HANDLEN - strlen(dcc[i].nick);
329 spaces[k] = 0;
330 dprintf(zidx, "%-4d %5d %s%s %-26s %s\n", i,
331 dcc[i].port, dcc[i].nick, spaces, dcc[i].host + j, other);
332 spaces[k] = ' ';
333 }
334 }
335
336 /* Mark someone on dcc chat as no longer away
337 */
338 void not_away(int idx)
339 {
340 if (dcc[idx].u.chat->away == NULL) {
341 dprintf(idx, "You weren't away!\n");
342 return;
343 }
344 if (dcc[idx].u.chat->channel >= 0) {
345 chanout_but(-1, dcc[idx].u.chat->channel,
346 "*** %s is no longer away.\n", dcc[idx].nick);
347 if (dcc[idx].u.chat->channel < 100000) {
348 botnet_send_away(-1, botnetnick, dcc[idx].sock, NULL, idx);
349 }
350 }
351 dprintf(idx, "You're not away any more.\n");
352 free_null(dcc[idx].u.chat->away);
353 check_tcl_away(botnetnick, dcc[idx].sock, NULL);
354 }
355
356 void set_away(int idx, char *s)
357 {
358 if (s == NULL) {
359 not_away(idx);
360 return;
361 }
362 if (!s[0]) {
363 not_away(idx);
364 return;
365 }
366 if (dcc[idx].u.chat->away != NULL)
367 free(dcc[idx].u.chat->away);
368 dcc[idx].u.chat->away = strdup(s);
369 if (dcc[idx].u.chat->channel >= 0) {
370 chanout_but(-1, dcc[idx].u.chat->channel,
371 "*** %s is now away: %s\n", dcc[idx].nick, s);
372 if (dcc[idx].u.chat->channel < 100000) {
373 botnet_send_away(-1, botnetnick, dcc[idx].sock, s, idx);
374 }
375 }
376 dprintf(idx, "You are now away.\n");
377 check_tcl_away(botnetnick, dcc[idx].sock, s);
378 }
379
380 /* Make a password, 10-15 random letters and digits
381 */
382 void makepass(char *s)
383 {
384 int i;
385
386 i = 10 + (random() % 6);
387 make_rand_str(s, i);
388 }
389
390 void flush_lines(int idx, struct chat_info *ci)
391 {
392 int c = ci->line_count;
393 struct msgq *p = ci->buffer, *o;
394
395 while (p && c < (ci->max_line)) {
396 ci->current_lines--;
397 tputs(dcc[idx].sock, p->msg, p->len);
398 free(p->msg);
399 o = p->next;
400 free(p);
401 p = o;
402 c++;
403 }
404 if (p != NULL) {
405 if (dcc[idx].status & STAT_TELNET)
406 tputs(dcc[idx].sock, "[More]: ", 8);
407 else
408 tputs(dcc[idx].sock, "[More]\n", 7);
409 }
410 ci->buffer = p;
411 ci->line_count = 0;
412 }
413
414 int new_dcc(struct dcc_table *type, int xtra_size)
415 {
416 int i = dcc_total;
417
418 for (i = 0; i < dcc_total; i++)
419 if (!dcc[i].type) break;
420
421 if (i == max_dcc)
422 return -1;
423
424 if (i == dcc_total)
425 dcc_total++;
426 memset(&dcc[i], 0, sizeof(*dcc));
427
428 dcc[i].type = type;
429 if (xtra_size)
430 dcc[i].u.other = calloc(1, xtra_size);
431 return i;
432 }
433
434 /* Changes the given dcc entry to another type.
435 */
436 void changeover_dcc(int i, struct dcc_table *type, int xtra_size)
437 {
438 /* Free old structure. */
439 if (dcc[i].type && dcc[i].type->kill)
440 dcc[i].type->kill(i, dcc[i].u.other);
441 else if (dcc[i].u.other)
442 free_null(dcc[i].u.other);
443
444 dcc[i].type = type;
445 if (xtra_size)
446 dcc[i].u.other = calloc(1, xtra_size);
447 }
448
449 int detect_dcc_flood(time_t * timer, struct chat_info *chat, int idx)
450 {
451 time_t t;
452
453 if (!dcc_flood_thr)
454 return 0;
455 t = now;
456 if (*timer != t) {
457 *timer = t;
458 chat->msgs_per_sec = 0;
459 } else {
460 chat->msgs_per_sec++;
461 if (chat->msgs_per_sec > dcc_flood_thr) {
462 /* FLOOD */
463 dprintf(idx, "*** FLOOD: %s.\n", _("Goodbye"));
464 /* Evil assumption here that flags&DCT_CHAT implies chat type */
465 if ((dcc[idx].type->flags & DCT_CHAT) && chat &&
466 (chat->channel >= 0)) {
467 char x[1024];
468
469 snprintf(x, sizeof x, _("%s has been forcibly removed for flooding.\n"), dcc[idx].nick);
470 chanout_but(idx, chat->channel, "*** %s", x);
471 if (chat->channel < 100000)
472 botnet_send_part_idx(idx, x);
473 }
474 check_tcl_chof(dcc[idx].nick, dcc[idx].sock);
475 if ((dcc[idx].sock != STDOUT) || backgrd) {
476 killsock(dcc[idx].sock);
477 lostdcc(idx);
478 } else {
479 dprintf(DP_STDOUT, "\n### SIMULATION RESET ###\n\n");
480 dcc_chatter(idx);
481 }
482 return 1; /* <- flood */
483 }
484 }
485 return 0;
486 }
487
488 /* Handle someone being booted from dcc chat.
489 */
490 void do_boot(int idx, char *by, char *reason)
491 {
492 int files = (dcc[idx].type != &DCC_CHAT);
493
494 dprintf(idx, _("-=- poof -=-\n"));
495 dprintf(idx, _("Youve been booted from the %s by %s%s%s\n"), files ? "file section" : "bot",
496 by, reason[0] ? ": " : ".", reason);
497 /* If it's a partyliner (chatterer :) */
498 /* Horrible assumption that DCT_CHAT using structure uses same format
499 * as DCC_CHAT */
500 if ((dcc[idx].type->flags & DCT_CHAT) &&
501 (dcc[idx].u.chat->channel >= 0)) {
502 char x[1024];
503
504 snprintf(x, sizeof x, _("%s booted %s from the party line%s%s\n"), by, dcc[idx].nick,
505 reason[0] ? ": " : "", reason);
506 chanout_but(idx, dcc[idx].u.chat->channel, "*** %s.\n", x);
507 if (dcc[idx].u.chat->channel < 100000)
508 botnet_send_part_idx(idx, x);
509 }
510 check_tcl_chof(dcc[idx].nick, dcc[idx].sock);
511 if ((dcc[idx].sock != STDOUT) || backgrd) {
512 killsock(dcc[idx].sock);
513 lostdcc(idx);
514 /* Entry must remain in the table so it can be logged by the caller */
515 } else {
516 dprintf(DP_STDOUT, "\n### SIMULATION RESET\n\n");
517 dcc_chatter(idx);
518 }
519 return;
520 }

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