/[cvs]/eggdrop1.9/src/dccutil.c
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Revision 1.24 - (hide annotations) (download) (as text)
Sun Dec 10 15:10:27 2000 UTC (18 years, 10 months ago) by guppy
Branch: MAIN
Changes since 1.23: +7 -14 lines
File MIME type: text/x-chdr
guppy: core_cleanup.diff ...

1 fabian 1.10 /*
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     *
9 guppy 1.24 * $Id: dccutil.c,v 1.23 2000/09/18 20:04:57 fabian Exp $
10 segfault 1.1 */
11 fabian 1.10 /*
12     * Copyright (C) 1997 Robey Pointer
13 fabian 1.16 * Copyright (C) 1999, 2000 Eggheads
14 fabian 1.10 *
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 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    
43     char motdfile[121] = "text/motd"; /* File where the motd is stored */
44     int connect_timeout = 15; /* How long to wait before a telnet
45     connection times out */
46     int reserved_port = 0;
47 segfault 1.1
48    
49     void init_dcc_max()
50     {
51     int osock = MAXSOCKS;
52    
53     if (max_dcc < 1)
54     max_dcc = 1;
55     if (dcc)
56     dcc = nrealloc(dcc, sizeof(struct dcc_t) * max_dcc);
57     else
58     dcc = nmalloc(sizeof(struct dcc_t) * max_dcc);
59    
60     MAXSOCKS = max_dcc + 10;
61     if (socklist)
62     socklist = (sock_list *) nrealloc((void *) socklist,
63     sizeof(sock_list) * MAXSOCKS);
64     else
65     socklist = (sock_list *) nmalloc(sizeof(sock_list) * MAXSOCKS);
66     for (; osock < MAXSOCKS; osock++)
67     socklist[osock].flags = SOCK_UNUSED;
68     }
69    
70     int expmem_dccutil()
71     {
72     int tot, i;
73    
74     tot = sizeof(struct dcc_t) * max_dcc + sizeof(sock_list) * MAXSOCKS;
75    
76     for (i = 0; i < dcc_total; i++) {
77     if (dcc[i].type && dcc[i].type->expmem)
78     tot += dcc[i].type->expmem(dcc[i].u.other);
79     }
80     return tot;
81     }
82    
83     static char SBUF[1024];
84    
85 fabian 1.17 /* Replace \n with \r\n */
86 segfault 1.1 char *add_cr(char *buf)
87     {
88     static char WBUF[1024];
89     char *p, *q;
90    
91     for (p = buf, q = WBUF; *p; p++, q++) {
92     if (*p == '\n')
93     *q++ = '\r';
94     *q = *p;
95     }
96     *q = *p;
97     return WBUF;
98     }
99    
100     extern void (*qserver) (int, char *, int);
101 fabian 1.7
102 fabian 1.5 void dprintf EGG_VARARGS_DEF(int, arg1)
103 segfault 1.1 {
104     char *format;
105     int idx, len;
106 fabian 1.17 va_list va;
107 segfault 1.1
108 fabian 1.5 idx = EGG_VARARGS_START(int, arg1, va);
109 segfault 1.1 format = va_arg(va, char *);
110 fabian 1.18 if ((len = egg_vsnprintf(SBUF, 1023, format, va)) < 0)
111 segfault 1.1 SBUF[len = 1023] = 0;
112     va_end(va);
113     if (idx < 0) {
114     tputs(-idx, SBUF, len);
115     } else if (idx > 0x7FF0) {
116     switch (idx) {
117     case DP_LOG:
118     putlog(LOG_MISC, "*", "%s", SBUF);
119     break;
120     case DP_STDOUT:
121     tputs(STDOUT, SBUF, len);
122     break;
123     case DP_STDERR:
124     tputs(STDERR, SBUF, len);
125     break;
126     case DP_SERVER:
127     case DP_HELP:
128     case DP_MODE:
129 fabian 1.8 case DP_MODE_NEXT:
130     case DP_SERVER_NEXT:
131     case DP_HELP_NEXT:
132 segfault 1.1 qserver(idx, SBUF, len);
133     break;
134     }
135     return;
136     } else {
137 fabian 1.17 if (len > 500) { /* Truncate to fit */
138 segfault 1.1 SBUF[500] = 0;
139     strcat(SBUF, "\n");
140     len = 501;
141     }
142     if (dcc[idx].type && ((long) (dcc[idx].type->output) == 1)) {
143     char *p = add_cr(SBUF);
144    
145     tputs(dcc[idx].sock, p, strlen(p));
146     } else if (dcc[idx].type && dcc[idx].type->output) {
147     dcc[idx].type->output(idx, SBUF, dcc[idx].u.other);
148     } else
149     tputs(dcc[idx].sock, SBUF, len);
150     }
151     }
152    
153 fabian 1.5 void chatout EGG_VARARGS_DEF(char *, arg1)
154 segfault 1.1 {
155     int i;
156     char *format;
157     char s[601];
158 fabian 1.17 va_list va;
159 segfault 1.1
160 fabian 1.5 format = EGG_VARARGS_START(char *, arg1, va);
161 fabian 1.18 if (egg_vsnprintf(s, 511, format, va) < 0)
162 segfault 1.1 s[511] = 0;
163     for (i = 0; i < dcc_total; i++)
164     if (dcc[i].type == &DCC_CHAT)
165     if (dcc[i].u.chat->channel >= 0)
166     dprintf(i, "%s", s);
167     va_end(va);
168     }
169    
170 fabian 1.17 /* Print to all on this channel but one.
171     */
172 fabian 1.5 void chanout_but EGG_VARARGS_DEF(int, arg1)
173 segfault 1.1 {
174     int i, x, chan;
175     char *format;
176     char s[601];
177 fabian 1.17 va_list va;
178 segfault 1.1
179 fabian 1.5 x = EGG_VARARGS_START(int, arg1, va);
180 segfault 1.1 chan = va_arg(va, int);
181     format = va_arg(va, char *);
182 fabian 1.18 if (egg_vsnprintf(s, 511, format, va) < 0)
183 segfault 1.1 s[511] = 0;
184     for (i = 0; i < dcc_total; i++)
185     if ((dcc[i].type == &DCC_CHAT) && (i != x))
186     if (dcc[i].u.chat->channel == chan)
187     dprintf(i, "%s", s);
188     va_end(va);
189     }
190    
191     void dcc_chatter(int idx)
192     {
193     int i, j;
194 fabian 1.17 struct flag_record fr = {FR_GLOBAL | FR_CHAN | FR_ANYWH, 0, 0, 0, 0, 0};
195 segfault 1.1
196     get_user_flagrec(dcc[idx].user, &fr, NULL);
197     show_motd(idx);
198     i = dcc[idx].u.chat->channel;
199     dcc[idx].u.chat->channel = 234567;
200     j = dcc[idx].sock;
201     strcpy(dcc[idx].u.chat->con_chan, "***");
202     check_tcl_chon(dcc[idx].nick, dcc[idx].sock);
203 fabian 1.17 /* Still there? */
204 segfault 1.1 if ((idx >= dcc_total) || (dcc[idx].sock != j))
205 fabian 1.17 return; /* Nope */
206     /* Tcl script may have taken control */
207 segfault 1.1 if (dcc[idx].type == &DCC_CHAT) {
208     if (!strcmp(dcc[idx].u.chat->con_chan, "***"))
209     strcpy(dcc[idx].u.chat->con_chan, "*");
210     if (dcc[idx].u.chat->channel == 234567) {
211 fabian 1.17 /* If the chat channel has already been altered it's *highly*
212 segfault 1.1 * probably join/part messages have been broadcast everywhere,
213 fabian 1.17 * so dont bother sending them
214     */
215 segfault 1.1 if (i == -2)
216     i = 0;
217     dcc[idx].u.chat->channel = i;
218     if (dcc[idx].u.chat->channel >= 0) {
219     if (dcc[idx].u.chat->channel < 100000) {
220     botnet_send_join_idx(idx, -1);
221     }
222     }
223     check_tcl_chjn(botnetnick, dcc[idx].nick, dcc[idx].u.chat->channel,
224     geticon(idx), dcc[idx].sock, dcc[idx].host);
225     }
226 fabian 1.17 /* But *do* bother with sending it locally */
227 guppy 1.24 if (!dcc[idx].u.chat->channel) {
228 segfault 1.1 chanout_but(-1, 0, "*** %s joined the party line.\n", dcc[idx].nick);
229     } else if (dcc[idx].u.chat->channel > 0) {
230     chanout_but(-1, dcc[idx].u.chat->channel,
231     "*** %s joined the channel.\n", dcc[idx].nick);
232     }
233     }
234     }
235    
236 fabian 1.14 /* Mark an entry as lost and deconstruct it's contents. It will be securely
237     * removed from the dcc list in the main loop.
238     */
239 segfault 1.1 void lostdcc(int n)
240     {
241 fabian 1.14 if (dcc[n].type && dcc[n].type->kill)
242     dcc[n].type->kill(n, dcc[n].u.other);
243     else if (dcc[n].u.other)
244     nfree(dcc[n].u.other);
245 fabian 1.19 egg_bzero(&dcc[n], sizeof(struct dcc_t));
246 fabian 1.14
247     dcc[n].sock = (-1);
248 fabian 1.11 dcc[n].type = &DCC_LOST;
249     }
250    
251     /* Remove entry from dcc list. Think twice before using this function,
252     * because it invalidates any variables that point to a specific dcc
253     * entry!
254 fabian 1.17 *
255     * Note: The entry will be deconstructed if it was not deconstructed
256     * already. This case should normally not occur.
257 fabian 1.11 */
258     void removedcc(int n)
259     {
260 segfault 1.1 if (dcc[n].type && dcc[n].type->kill)
261     dcc[n].type->kill(n, dcc[n].u.other);
262     else if (dcc[n].u.other)
263     nfree(dcc[n].u.other);
264     dcc_total--;
265     if (n < dcc_total)
266 fabian 1.19 egg_memcpy(&dcc[n], &dcc[dcc_total], sizeof(struct dcc_t));
267 segfault 1.1 else
268 fabian 1.19 egg_bzero(&dcc[n], sizeof(struct dcc_t)); /* drummer */
269 fabian 1.12 }
270    
271     /* Clean up sockets that were just left for dead.
272     */
273     void dcc_remove_lost(void)
274     {
275     int i;
276    
277     for (i = 0; i < dcc_total; i++) {
278     if (dcc[i].type == &DCC_LOST) {
279 fabian 1.14 dcc[i].type = NULL;
280 fabian 1.12 dcc[i].sock = (-1);
281     removedcc(i);
282     i--;
283     }
284     }
285 segfault 1.1 }
286    
287 fabian 1.17 /* Show list of current dcc's to a dcc-chatter
288     * positive value: idx given -- negative value: sock given
289     */
290 segfault 1.1 void tell_dcc(int zidx)
291     {
292     int i, j, k;
293     char other[160];
294    
295     spaces[HANDLEN - 9] = 0;
296     dprintf(zidx, "SOCK ADDR PORT NICK %s HOST TYPE\n"
297     ,spaces);
298     dprintf(zidx, "---- -------- ----- ---------%s ----------------- ----\n"
299     ,spaces);
300     spaces[HANDLEN - 9] = ' ';
301 fabian 1.17 /* Show server */
302 segfault 1.1 for (i = 0; i < dcc_total; i++) {
303     j = strlen(dcc[i].host);
304     if (j > 17)
305     j -= 17;
306     else
307     j = 0;
308     if (dcc[i].type && dcc[i].type->display)
309     dcc[i].type->display(i, other);
310     else {
311     sprintf(other, "?:%lX !! ERROR !!", (long) dcc[i].type);
312     break;
313     }
314     k = HANDLEN - strlen(dcc[i].nick);
315     spaces[k] = 0;
316 fabian 1.14 dprintf(zidx, "%-4d %08X %5d %s%s %-17s %s\n", dcc[i].sock, dcc[i].addr,
317 segfault 1.1 dcc[i].port, dcc[i].nick, spaces, dcc[i].host + j, other);
318     spaces[k] = ' ';
319     }
320     }
321    
322 fabian 1.17 /* Mark someone on dcc chat as no longer away
323     */
324 segfault 1.1 void not_away(int idx)
325     {
326     if (dcc[idx].u.chat->away == NULL) {
327     dprintf(idx, "You weren't away!\n");
328     return;
329     }
330     if (dcc[idx].u.chat->channel >= 0) {
331     chanout_but(-1, dcc[idx].u.chat->channel,
332     "*** %s is no longer away.\n", dcc[idx].nick);
333     if (dcc[idx].u.chat->channel < 100000) {
334     botnet_send_away(-1, botnetnick, dcc[idx].sock, NULL, idx);
335     }
336     }
337     dprintf(idx, "You're not away any more.\n");
338     nfree(dcc[idx].u.chat->away);
339     dcc[idx].u.chat->away = NULL;
340     check_tcl_away(botnetnick, dcc[idx].sock, NULL);
341     }
342    
343     void set_away(int idx, char *s)
344     {
345     if (s == NULL) {
346     not_away(idx);
347     return;
348     }
349     if (!s[0]) {
350     not_away(idx);
351     return;
352     }
353     if (dcc[idx].u.chat->away != NULL)
354     nfree(dcc[idx].u.chat->away);
355     dcc[idx].u.chat->away = (char *) nmalloc(strlen(s) + 1);
356     strcpy(dcc[idx].u.chat->away, s);
357     if (dcc[idx].u.chat->channel >= 0) {
358     chanout_but(-1, dcc[idx].u.chat->channel,
359     "*** %s is now away: %s\n", dcc[idx].nick, s);
360     if (dcc[idx].u.chat->channel < 100000) {
361     botnet_send_away(-1, botnetnick, dcc[idx].sock, s, idx);
362     }
363     }
364     dprintf(idx, "You are now away.\n");
365     check_tcl_away(botnetnick, dcc[idx].sock, s);
366     }
367    
368 fabian 1.17 /* This helps the memory debugging
369     */
370 segfault 1.1 void *_get_data_ptr(int size, char *file, int line)
371     {
372     char *p;
373 fabian 1.9 #ifdef DEBUG_MEM
374 segfault 1.1 char x[1024];
375    
376 fabian 1.20 p = strrchr(file, '/');
377 guppy 1.24 egg_snprintf(x, sizeof x, "dccutil.c:%s", p ? p + 1 : file);
378 segfault 1.1 p = n_malloc(size, x, line);
379     #else
380     p = nmalloc(size);
381     #endif
382 fabian 1.19 egg_bzero(p, size);
383 segfault 1.1 return p;
384     }
385    
386 fabian 1.17 /* Make a password, 10-15 random letters and digits
387     */
388 segfault 1.1 void makepass(char *s)
389     {
390 fabian 1.2 int i;
391 segfault 1.1
392     i = 10 + (random() % 6);
393 fabian 1.2 make_rand_str(s, i);
394 segfault 1.1 }
395    
396     void flush_lines(int idx, struct chat_info *ci)
397     {
398     int c = ci->line_count;
399     struct msgq *p = ci->buffer, *o;
400    
401     while (p && c < (ci->max_line)) {
402     ci->current_lines--;
403     tputs(dcc[idx].sock, p->msg, p->len);
404     nfree(p->msg);
405     o = p->next;
406     nfree(p);
407     p = o;
408     c++;
409     }
410     if (p != NULL) {
411     if (dcc[idx].status & STAT_TELNET)
412     tputs(dcc[idx].sock, "[More]: ", 8);
413     else
414     tputs(dcc[idx].sock, "[More]\n", 7);
415     }
416     ci->buffer = p;
417     ci->line_count = 0;
418     }
419    
420     int new_dcc(struct dcc_table *type, int xtra_size)
421     {
422     int i = dcc_total;
423    
424     if (dcc_total == max_dcc)
425     return -1;
426     dcc_total++;
427 fabian 1.19 egg_bzero((char *) &dcc[i], sizeof(struct dcc_t));
428 segfault 1.1
429     dcc[i].type = type;
430     if (xtra_size) {
431     dcc[i].u.other = nmalloc(xtra_size);
432 fabian 1.19 egg_bzero(dcc[i].u.other, xtra_size);
433 segfault 1.1 }
434     return i;
435     }
436    
437 fabian 1.22 /* Changes the given dcc entry to another type.
438     */
439 fabian 1.3 void changeover_dcc(int i, struct dcc_table *type, int xtra_size)
440     {
441 fabian 1.22 /* Free old structure. */
442 fabian 1.3 if (dcc[i].type && dcc[i].type->kill)
443     dcc[i].type->kill(i, dcc[i].u.other);
444     else if (dcc[i].u.other) {
445     nfree(dcc[i].u.other);
446     dcc[i].u.other = NULL;
447     }
448    
449     dcc[i].type = type;
450     if (xtra_size) {
451     dcc[i].u.other = nmalloc(xtra_size);
452 fabian 1.19 egg_bzero(dcc[i].u.other, xtra_size);
453 fabian 1.3 }
454     }
455    
456 segfault 1.1 int detect_dcc_flood(time_t * timer, struct chat_info *chat, int idx)
457     {
458     time_t t;
459    
460 guppy 1.24 if (!dcc_flood_thr)
461 segfault 1.1 return 0;
462     t = now;
463     if (*timer != t) {
464     *timer = t;
465     chat->msgs_per_sec = 0;
466     } else {
467     chat->msgs_per_sec++;
468     if (chat->msgs_per_sec > dcc_flood_thr) {
469     /* FLOOD */
470     dprintf(idx, "*** FLOOD: %s.\n", IRC_GOODBYE);
471 fabian 1.17 /* Evil assumption here that flags&DCT_CHAT implies chat type */
472 segfault 1.1 if ((dcc[idx].type->flags & DCT_CHAT) && chat &&
473     (chat->channel >= 0)) {
474     char x[1024];
475    
476 guppy 1.24 egg_snprintf(x, sizeof x, DCC_FLOODBOOT, dcc[idx].nick);
477 segfault 1.1 chanout_but(idx, chat->channel, "*** %s", x);
478     if (chat->channel < 100000)
479     botnet_send_part_idx(idx, x);
480     }
481     check_tcl_chof(dcc[idx].nick, dcc[idx].sock);
482     if ((dcc[idx].sock != STDOUT) || backgrd) {
483     killsock(dcc[idx].sock);
484     lostdcc(idx);
485     } else {
486     dprintf(DP_STDOUT, "\n### SIMULATION RESET ###\n\n");
487     dcc_chatter(idx);
488     }
489     return 1; /* <- flood */
490     }
491     }
492     return 0;
493     }
494    
495 fabian 1.17 /* Handle someone being booted from dcc chat.
496     */
497 segfault 1.1 void do_boot(int idx, char *by, char *reason)
498     {
499     int files = (dcc[idx].type != &DCC_CHAT);
500    
501     dprintf(idx, DCC_BOOTED1);
502 fabian 1.23 dprintf(idx, DCC_BOOTED2, files ? "file section" : "bot",
503     by, reason[0] ? ": " : ".", reason);
504 fabian 1.17 /* If it's a partyliner (chatterer :) */
505     /* Horrible assumption that DCT_CHAT using structure uses same format
506 segfault 1.1 * as DCC_CHAT */
507     if ((dcc[idx].type->flags & DCT_CHAT) &&
508     (dcc[idx].u.chat->channel >= 0)) {
509     char x[1024];
510    
511 guppy 1.24 egg_snprintf(x, sizeof x, DCC_BOOTED3, by, dcc[idx].nick,
512     reason[0] ? ": " : "", reason);
513 segfault 1.1 chanout_but(idx, dcc[idx].u.chat->channel, "*** %s.\n", x);
514     if (dcc[idx].u.chat->channel < 100000)
515     botnet_send_part_idx(idx, x);
516     }
517     check_tcl_chof(dcc[idx].nick, dcc[idx].sock);
518     if ((dcc[idx].sock != STDOUT) || backgrd) {
519     killsock(dcc[idx].sock);
520 fabian 1.11 lostdcc(idx);
521 fabian 1.17 /* Entry must remain in the table so it can be logged by the caller */
522 segfault 1.1 } else {
523     dprintf(DP_STDOUT, "\n### SIMULATION RESET\n\n");
524     dcc_chatter(idx);
525     }
526     return;
527     }

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