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

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Revision 1.38 - (hide annotations) (download) (as text)
Thu Oct 11 11:34:19 2001 UTC (18 years ago) by tothwolf
Branch: MAIN
Changes since 1.37: +3 -3 lines
File MIME type: text/x-chdr
* Use calloc() instead of malloc_memset macro

1 guppy 1.31 /*
2 segfault 1.1 * dccutil.c -- handles:
3 fabian 1.10 * 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 guppy 1.31 *
9 tothwolf 1.38 * $Id: dccutil.c,v 1.37 2001/10/10 10:44:04 tothwolf Exp $
10 segfault 1.1 */
11 guppy 1.31 /*
12     * Copyright (C) 1997 Robey Pointer
13     * Copyright (C) 1999, 2000, 2001 Eggheads Development Team
14     *
15 fabian 1.10 * 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 guppy 1.31 *
20 fabian 1.10 * 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 guppy 1.31 *
25 fabian 1.10 * 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 segfault 1.1 */
29    
30 fabian 1.17 #include <sys/stat.h>
31 segfault 1.1 #include "main.h"
32     #include <errno.h>
33     #include "chan.h"
34     #include "modules.h"
35     #include "tandem.h"
36    
37 fabian 1.17 extern struct dcc_t *dcc;
38     extern int dcc_total, max_dcc, dcc_flood_thr, backgrd, MAXSOCKS;
39     extern char botnetnick[], spaces[], version[];
40     extern time_t now;
41     extern sock_list *socklist;
42 guppy 1.28 extern Tcl_Interp *interp;
43 fabian 1.17
44     char motdfile[121] = "text/motd"; /* File where the motd is stored */
45     int connect_timeout = 15; /* How long to wait before a telnet
46     connection times out */
47 segfault 1.1
48 guppy 1.25 int reserved_port_min = 0;
49     int reserved_port_max = 0;
50 segfault 1.1
51     void init_dcc_max()
52     {
53     int osock = MAXSOCKS;
54    
55     if (max_dcc < 1)
56     max_dcc = 1;
57     if (dcc)
58 tothwolf 1.37 dcc = realloc(dcc, sizeof(struct dcc_t) * max_dcc);
59 segfault 1.1 else
60 tothwolf 1.37 dcc = malloc(sizeof(struct dcc_t) * max_dcc);
61 segfault 1.1
62     MAXSOCKS = max_dcc + 10;
63     if (socklist)
64 tothwolf 1.37 socklist = (sock_list *) realloc((void *) socklist,
65 segfault 1.1 sizeof(sock_list) * MAXSOCKS);
66     else
67 tothwolf 1.37 socklist = (sock_list *) malloc(sizeof(sock_list) * MAXSOCKS);
68 segfault 1.1 for (; osock < MAXSOCKS; osock++)
69     socklist[osock].flags = SOCK_UNUSED;
70     }
71    
72    
73 fabian 1.17 /* Replace \n with \r\n */
74 segfault 1.1 char *add_cr(char *buf)
75     {
76     static char WBUF[1024];
77     char *p, *q;
78    
79     for (p = buf, q = WBUF; *p; p++, q++) {
80     if (*p == '\n')
81     *q++ = '\r';
82     *q = *p;
83     }
84     *q = *p;
85     return WBUF;
86     }
87    
88     extern void (*qserver) (int, char *, int);
89 fabian 1.7
90 fabian 1.5 void dprintf EGG_VARARGS_DEF(int, arg1)
91 segfault 1.1 {
92 guppy 1.28 static char buf[1024];
93 segfault 1.1 char *format;
94     int idx, len;
95 fabian 1.17 va_list va;
96 segfault 1.1
97 fabian 1.5 idx = EGG_VARARGS_START(int, arg1, va);
98 segfault 1.1 format = va_arg(va, char *);
99 guppy 1.28 egg_vsnprintf(buf, 1023, format, va);
100 segfault 1.1 va_end(va);
101 guppy 1.28 /* We can not use the return value vsnprintf() to determine where
102     * to null terminate. The C99 standard specifies that vsnprintf()
103     * shall return the number of bytes that would be written if the
104     * buffer had been large enough, rather then -1.
105     */
106 poptix 1.32 /* We actually can, since if it's < 0 or >= sizeof(buf), we know it wrote
107     * sizeof(buf) bytes. But we're not doing that anyway.
108     */
109     buf[sizeof(buf)-1] = 0;
110 guppy 1.28
111 guppy 1.30 #if (TCL_MAJOR_VERSION >= 8 && TCL_MINOR_VERSION >= 1) || (TCL_MAJOR_VERSION >= 9)
112 guppy 1.29 str_nutf8tounicode(buf, sizeof buf);
113 guppy 1.28 #endif
114 poptix 1.32 len = strlen(buf);
115 guppy 1.28
116 segfault 1.1 if (idx < 0) {
117 guppy 1.28 tputs(-idx, buf, len);
118 segfault 1.1 } else if (idx > 0x7FF0) {
119     switch (idx) {
120     case DP_LOG:
121 guppy 1.28 putlog(LOG_MISC, "*", "%s", buf);
122 segfault 1.1 break;
123     case DP_STDOUT:
124 guppy 1.28 tputs(STDOUT, buf, len);
125 segfault 1.1 break;
126     case DP_STDERR:
127 guppy 1.28 tputs(STDERR, buf, len);
128 segfault 1.1 break;
129     case DP_SERVER:
130     case DP_HELP:
131     case DP_MODE:
132 fabian 1.8 case DP_MODE_NEXT:
133     case DP_SERVER_NEXT:
134     case DP_HELP_NEXT:
135 guppy 1.28 qserver(idx, buf, len);
136 segfault 1.1 break;
137     }
138     return;
139     } else {
140 fabian 1.17 if (len > 500) { /* Truncate to fit */
141 guppy 1.28 buf[500] = 0;
142     strcat(buf, "\n");
143 segfault 1.1 len = 501;
144     }
145     if (dcc[idx].type && ((long) (dcc[idx].type->output) == 1)) {
146 guppy 1.28 char *p = add_cr(buf);
147 segfault 1.1
148     tputs(dcc[idx].sock, p, strlen(p));
149     } else if (dcc[idx].type && dcc[idx].type->output) {
150 guppy 1.28 dcc[idx].type->output(idx, buf, dcc[idx].u.other);
151 segfault 1.1 } else
152 guppy 1.28 tputs(dcc[idx].sock, buf, len);
153 segfault 1.1 }
154     }
155    
156 fabian 1.5 void chatout EGG_VARARGS_DEF(char *, arg1)
157 segfault 1.1 {
158 guppy 1.28 int i, len;
159 segfault 1.1 char *format;
160     char s[601];
161 fabian 1.17 va_list va;
162 segfault 1.1
163 fabian 1.5 format = EGG_VARARGS_START(char *, arg1, va);
164 guppy 1.28 egg_vsnprintf(s, 511, format, va);
165     va_end(va);
166     len = strlen(s);
167     if (len > 511)
168     len = 511;
169 guppy 1.31 s[len + 1] = 0;
170 guppy 1.28
171 segfault 1.1 for (i = 0; i < dcc_total; i++)
172     if (dcc[i].type == &DCC_CHAT)
173     if (dcc[i].u.chat->channel >= 0)
174 guppy 1.28 dprintf(i, "%s", s);
175 guppy 1.31
176 segfault 1.1 }
177    
178 fabian 1.17 /* Print to all on this channel but one.
179     */
180 fabian 1.5 void chanout_but EGG_VARARGS_DEF(int, arg1)
181 segfault 1.1 {
182 guppy 1.28 int i, x, chan, len;
183 segfault 1.1 char *format;
184     char s[601];
185 fabian 1.17 va_list va;
186 segfault 1.1
187 fabian 1.5 x = EGG_VARARGS_START(int, arg1, va);
188 segfault 1.1 chan = va_arg(va, int);
189     format = va_arg(va, char *);
190 guppy 1.28 egg_vsnprintf(s, 511, format, va);
191     va_end(va);
192     len = strlen(s);
193     if (len > 511)
194     len = 511;
195 guppy 1.31 s[len + 1] = 0;
196    
197 segfault 1.1 for (i = 0; i < dcc_total; i++)
198     if ((dcc[i].type == &DCC_CHAT) && (i != x))
199     if (dcc[i].u.chat->channel == chan)
200 guppy 1.28 dprintf(i, "%s", s);
201 guppy 1.31
202 segfault 1.1 }
203    
204     void dcc_chatter(int idx)
205     {
206     int i, j;
207 fabian 1.17 struct flag_record fr = {FR_GLOBAL | FR_CHAN | FR_ANYWH, 0, 0, 0, 0, 0};
208 segfault 1.1
209     get_user_flagrec(dcc[idx].user, &fr, NULL);
210     show_motd(idx);
211     i = dcc[idx].u.chat->channel;
212     dcc[idx].u.chat->channel = 234567;
213     j = dcc[idx].sock;
214     strcpy(dcc[idx].u.chat->con_chan, "***");
215     check_tcl_chon(dcc[idx].nick, dcc[idx].sock);
216 fabian 1.17 /* Still there? */
217 segfault 1.1 if ((idx >= dcc_total) || (dcc[idx].sock != j))
218 fabian 1.17 return; /* Nope */
219     /* Tcl script may have taken control */
220 segfault 1.1 if (dcc[idx].type == &DCC_CHAT) {
221     if (!strcmp(dcc[idx].u.chat->con_chan, "***"))
222     strcpy(dcc[idx].u.chat->con_chan, "*");
223     if (dcc[idx].u.chat->channel == 234567) {
224 fabian 1.17 /* If the chat channel has already been altered it's *highly*
225 segfault 1.1 * probably join/part messages have been broadcast everywhere,
226 fabian 1.17 * so dont bother sending them
227     */
228 segfault 1.1 if (i == -2)
229     i = 0;
230     dcc[idx].u.chat->channel = i;
231     if (dcc[idx].u.chat->channel >= 0) {
232     if (dcc[idx].u.chat->channel < 100000) {
233     botnet_send_join_idx(idx, -1);
234     }
235     }
236     check_tcl_chjn(botnetnick, dcc[idx].nick, dcc[idx].u.chat->channel,
237     geticon(idx), dcc[idx].sock, dcc[idx].host);
238     }
239 fabian 1.17 /* But *do* bother with sending it locally */
240 guppy 1.24 if (!dcc[idx].u.chat->channel) {
241 segfault 1.1 chanout_but(-1, 0, "*** %s joined the party line.\n", dcc[idx].nick);
242     } else if (dcc[idx].u.chat->channel > 0) {
243     chanout_but(-1, dcc[idx].u.chat->channel,
244     "*** %s joined the channel.\n", dcc[idx].nick);
245     }
246     }
247     }
248    
249 fabian 1.14 /* Mark an entry as lost and deconstruct it's contents. It will be securely
250     * removed from the dcc list in the main loop.
251     */
252 segfault 1.1 void lostdcc(int n)
253     {
254 fabian 1.14 if (dcc[n].type && dcc[n].type->kill)
255     dcc[n].type->kill(n, dcc[n].u.other);
256     else if (dcc[n].u.other)
257 tothwolf 1.37 free(dcc[n].u.other);
258     memset(&dcc[n], 0, sizeof(struct dcc_t));
259 fabian 1.14
260     dcc[n].sock = (-1);
261 fabian 1.11 dcc[n].type = &DCC_LOST;
262     }
263    
264     /* Remove entry from dcc list. Think twice before using this function,
265     * because it invalidates any variables that point to a specific dcc
266     * entry!
267 fabian 1.17 *
268     * Note: The entry will be deconstructed if it was not deconstructed
269     * already. This case should normally not occur.
270 fabian 1.11 */
271     void removedcc(int n)
272     {
273 segfault 1.1 if (dcc[n].type && dcc[n].type->kill)
274     dcc[n].type->kill(n, dcc[n].u.other);
275     else if (dcc[n].u.other)
276 tothwolf 1.37 free(dcc[n].u.other);
277 segfault 1.1 dcc_total--;
278     if (n < dcc_total)
279 tothwolf 1.37 memcpy(&dcc[n], &dcc[dcc_total], sizeof(struct dcc_t));
280 segfault 1.1 else
281 tothwolf 1.37 memset(&dcc[n], 0, sizeof(struct dcc_t)); /* drummer */
282 fabian 1.12 }
283    
284     /* Clean up sockets that were just left for dead.
285     */
286     void dcc_remove_lost(void)
287     {
288     int i;
289    
290     for (i = 0; i < dcc_total; i++) {
291     if (dcc[i].type == &DCC_LOST) {
292 fabian 1.14 dcc[i].type = NULL;
293 fabian 1.12 dcc[i].sock = (-1);
294     removedcc(i);
295     i--;
296     }
297     }
298 segfault 1.1 }
299    
300 fabian 1.17 /* Show list of current dcc's to a dcc-chatter
301     * positive value: idx given -- negative value: sock given
302     */
303 segfault 1.1 void tell_dcc(int zidx)
304     {
305     int i, j, k;
306     char other[160];
307    
308     spaces[HANDLEN - 9] = 0;
309 drummer 1.33 dprintf(zidx, "SOCK PORT NICK %s HOST TYPE\n"
310 segfault 1.1 ,spaces);
311 drummer 1.33 dprintf(zidx, "---- ----- ---------%s -------------------------- ----\n"
312 segfault 1.1 ,spaces);
313     spaces[HANDLEN - 9] = ' ';
314 fabian 1.17 /* Show server */
315 segfault 1.1 for (i = 0; i < dcc_total; i++) {
316     j = strlen(dcc[i].host);
317 drummer 1.33 if (j > 26)
318     j -= 26;
319 segfault 1.1 else
320     j = 0;
321     if (dcc[i].type && dcc[i].type->display)
322     dcc[i].type->display(i, other);
323     else {
324     sprintf(other, "?:%lX !! ERROR !!", (long) dcc[i].type);
325     break;
326     }
327     k = HANDLEN - strlen(dcc[i].nick);
328     spaces[k] = 0;
329 drummer 1.33 dprintf(zidx, "%-4d %5d %s%s %-26s %s\n", dcc[i].sock,
330 segfault 1.1 dcc[i].port, dcc[i].nick, spaces, dcc[i].host + j, other);
331     spaces[k] = ' ';
332     }
333     }
334    
335 fabian 1.17 /* Mark someone on dcc chat as no longer away
336     */
337 segfault 1.1 void not_away(int idx)
338     {
339     if (dcc[idx].u.chat->away == NULL) {
340     dprintf(idx, "You weren't away!\n");
341     return;
342     }
343     if (dcc[idx].u.chat->channel >= 0) {
344     chanout_but(-1, dcc[idx].u.chat->channel,
345     "*** %s is no longer away.\n", dcc[idx].nick);
346     if (dcc[idx].u.chat->channel < 100000) {
347     botnet_send_away(-1, botnetnick, dcc[idx].sock, NULL, idx);
348     }
349     }
350     dprintf(idx, "You're not away any more.\n");
351 tothwolf 1.37 free_null(dcc[idx].u.chat->away);
352 segfault 1.1 check_tcl_away(botnetnick, dcc[idx].sock, NULL);
353     }
354    
355     void set_away(int idx, char *s)
356     {
357     if (s == NULL) {
358     not_away(idx);
359     return;
360     }
361     if (!s[0]) {
362     not_away(idx);
363     return;
364     }
365     if (dcc[idx].u.chat->away != NULL)
366 tothwolf 1.37 free(dcc[idx].u.chat->away);
367     malloc_strcpy(dcc[idx].u.chat->away, s);
368 segfault 1.1 if (dcc[idx].u.chat->channel >= 0) {
369     chanout_but(-1, dcc[idx].u.chat->channel,
370     "*** %s is now away: %s\n", dcc[idx].nick, s);
371     if (dcc[idx].u.chat->channel < 100000) {
372     botnet_send_away(-1, botnetnick, dcc[idx].sock, s, idx);
373     }
374     }
375     dprintf(idx, "You are now away.\n");
376     check_tcl_away(botnetnick, dcc[idx].sock, s);
377     }
378    
379 fabian 1.17 /* Make a password, 10-15 random letters and digits
380     */
381 segfault 1.1 void makepass(char *s)
382     {
383 fabian 1.2 int i;
384 segfault 1.1
385     i = 10 + (random() % 6);
386 fabian 1.2 make_rand_str(s, i);
387 segfault 1.1 }
388    
389     void flush_lines(int idx, struct chat_info *ci)
390     {
391     int c = ci->line_count;
392     struct msgq *p = ci->buffer, *o;
393    
394     while (p && c < (ci->max_line)) {
395     ci->current_lines--;
396     tputs(dcc[idx].sock, p->msg, p->len);
397 tothwolf 1.37 free(p->msg);
398 segfault 1.1 o = p->next;
399 tothwolf 1.37 free(p);
400 segfault 1.1 p = o;
401     c++;
402     }
403     if (p != NULL) {
404     if (dcc[idx].status & STAT_TELNET)
405     tputs(dcc[idx].sock, "[More]: ", 8);
406     else
407     tputs(dcc[idx].sock, "[More]\n", 7);
408     }
409     ci->buffer = p;
410     ci->line_count = 0;
411     }
412    
413     int new_dcc(struct dcc_table *type, int xtra_size)
414     {
415     int i = dcc_total;
416    
417     if (dcc_total == max_dcc)
418     return -1;
419     dcc_total++;
420 tothwolf 1.37 memset((char *) &dcc[i], 0, sizeof(struct dcc_t));
421 segfault 1.1
422     dcc[i].type = type;
423 tothwolf 1.37 if (xtra_size)
424 tothwolf 1.38 dcc[i].u.other = calloc(1, xtra_size);
425 segfault 1.1 return i;
426     }
427    
428 fabian 1.22 /* Changes the given dcc entry to another type.
429     */
430 fabian 1.3 void changeover_dcc(int i, struct dcc_table *type, int xtra_size)
431     {
432 fabian 1.22 /* Free old structure. */
433 fabian 1.3 if (dcc[i].type && dcc[i].type->kill)
434     dcc[i].type->kill(i, dcc[i].u.other);
435 tothwolf 1.37 else if (dcc[i].u.other)
436     free_null(dcc[i].u.other);
437 fabian 1.3
438     dcc[i].type = type;
439 tothwolf 1.37 if (xtra_size)
440 tothwolf 1.38 dcc[i].u.other = calloc(1, xtra_size);
441 fabian 1.3 }
442    
443 segfault 1.1 int detect_dcc_flood(time_t * timer, struct chat_info *chat, int idx)
444     {
445     time_t t;
446    
447 guppy 1.24 if (!dcc_flood_thr)
448 segfault 1.1 return 0;
449     t = now;
450     if (*timer != t) {
451     *timer = t;
452     chat->msgs_per_sec = 0;
453     } else {
454     chat->msgs_per_sec++;
455     if (chat->msgs_per_sec > dcc_flood_thr) {
456     /* FLOOD */
457 ite 1.34 dprintf(idx, "*** FLOOD: %s.\n", _("Goodbye"));
458 fabian 1.17 /* Evil assumption here that flags&DCT_CHAT implies chat type */
459 segfault 1.1 if ((dcc[idx].type->flags & DCT_CHAT) && chat &&
460     (chat->channel >= 0)) {
461     char x[1024];
462    
463 ite 1.34 egg_snprintf(x, sizeof x, _("%s has been forcibly removed for flooding.\n"), dcc[idx].nick);
464 segfault 1.1 chanout_but(idx, chat->channel, "*** %s", x);
465     if (chat->channel < 100000)
466     botnet_send_part_idx(idx, x);
467     }
468     check_tcl_chof(dcc[idx].nick, dcc[idx].sock);
469     if ((dcc[idx].sock != STDOUT) || backgrd) {
470     killsock(dcc[idx].sock);
471     lostdcc(idx);
472     } else {
473     dprintf(DP_STDOUT, "\n### SIMULATION RESET ###\n\n");
474     dcc_chatter(idx);
475     }
476     return 1; /* <- flood */
477     }
478     }
479     return 0;
480     }
481    
482 fabian 1.17 /* Handle someone being booted from dcc chat.
483     */
484 segfault 1.1 void do_boot(int idx, char *by, char *reason)
485     {
486     int files = (dcc[idx].type != &DCC_CHAT);
487    
488 ite 1.34 dprintf(idx, _("-=- poof -=-\n"));
489     dprintf(idx, _("Youve been booted from the %s by %s%s%s\n"), files ? "file section" : "bot",
490 fabian 1.23 by, reason[0] ? ": " : ".", reason);
491 fabian 1.17 /* If it's a partyliner (chatterer :) */
492     /* Horrible assumption that DCT_CHAT using structure uses same format
493 segfault 1.1 * as DCC_CHAT */
494     if ((dcc[idx].type->flags & DCT_CHAT) &&
495     (dcc[idx].u.chat->channel >= 0)) {
496     char x[1024];
497    
498 ite 1.34 egg_snprintf(x, sizeof x, _("%s booted %s from the party line%s%s\n"), by, dcc[idx].nick,
499 guppy 1.24 reason[0] ? ": " : "", reason);
500 segfault 1.1 chanout_but(idx, dcc[idx].u.chat->channel, "*** %s.\n", x);
501     if (dcc[idx].u.chat->channel < 100000)
502     botnet_send_part_idx(idx, x);
503     }
504     check_tcl_chof(dcc[idx].nick, dcc[idx].sock);
505     if ((dcc[idx].sock != STDOUT) || backgrd) {
506     killsock(dcc[idx].sock);
507 fabian 1.11 lostdcc(idx);
508 fabian 1.17 /* Entry must remain in the table so it can be logged by the caller */
509 segfault 1.1 } else {
510     dprintf(DP_STDOUT, "\n### SIMULATION RESET\n\n");
511     dcc_chatter(idx);
512     }
513     return;
514     }

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