source: code/icb.c@ c9402c3

Last change on this file since c9402c3 was efa8586, checked in by Mike Belopuhov <mike@…>, 11 years ago

When doing privmsg do username lookups in all groups until the first match
  • Property mode set to 100644
File size: 14.8 KB
RevLine 
[cd7b81d]1/*
[626f420]2 * Copyright (c) 2009, 2010, 2013, 2014 Mike Belopuhov
[cd7b81d]3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include <sys/param.h>
18#include <sys/queue.h>
19#include <stdarg.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <syslog.h>
24#include <unistd.h>
[626f420]25#include <ctype.h>
[cd7b81d]26#include <event.h>
[b7bc432]27#include <vis.h>
[cd7b81d]28
29#include "icb.h"
30#include "icbd.h"
31
32extern int creategroups;
[a785c27]33extern char srvname[MAXHOSTNAMELEN];
[cd7b81d]34
35void icb_command(struct icb_session *, char *, char *);
36void icb_groupmsg(struct icb_session *, char *);
37void icb_login(struct icb_session *, char *, char *, char *);
[4284008]38int icb_dowho(struct icb_session *, struct icb_group *);
[1d2125a]39int icb_modpermit(struct icb_session *);
[cd7b81d]40char *icb_nextfield(char **);
41
42/*
43 * icb_init: initializes pointers to callbacks
44 */
45void
46icb_init(struct icbd_callbacks *ic)
47{
48 icb_drop = ic->drop;
49 icb_log = ic->log;
50 icb_send = ic->send;
51
52 LIST_INIT(&groups);
[a785c27]53
54 if (strlen(srvname) == 0)
55 (void)gethostname(srvname, sizeof srvname);
56 /*
57 * MAXHOSTNAMELEN is usually greater than what we
58 * can actually send, hence truncation:
59 */
60 if (strlen(srvname) > 200)
61 srvname[200] = '\0';
[cd7b81d]62}
63
64/*
65 * icb_start: called upon accepting a new connection, greets new client
66 */
67void
68icb_start(struct icb_session *is)
69{
[a785c27]70 icb_sendfmt(is, "%c%c%c%s%c%s", ICB_M_PROTO, '1', ICB_M_SEP, srvname,
[cd7b81d]71 ICB_M_SEP, "icbd");
72 SETF(is->flags, ICB_SF_PROTOSENT);
73}
74
75/*
76 * icb_input: main input processing routine
77 */
78void
79icb_input(struct icb_session *is)
80{
81 char *msg = is->buffer;
82 char type;
83
84 is->last = getmonotime();
85 type = msg[1];
86 msg += 2;
87 if (!ISSETF(is->flags, ICB_SF_LOGGEDIN) && type != ICB_M_LOGIN) {
88 icb_error(is, "Not logged in");
89 return;
90 }
91 switch (type) {
92 case ICB_M_LOGIN: {
93 char *nick, *group, *client, *cmd;
94
95 client = icb_nextfield(&msg);
96 nick = icb_nextfield(&msg);
97 group = icb_nextfield(&msg);
98 cmd = icb_nextfield(&msg);
99 if (strlen(cmd) > 0 && cmd[0] == 'w') {
100 icb_error(is, "Command not implemented");
101 icb_drop(is, NULL);
102 return;
103 }
[1da9ee5]104 if (strlen(cmd) == 0 || strcmp(cmd, "login") != 0) {
105 icb_error(is, "Malformed login packet");
106 icb_drop(is, NULL);
107 return;
108 }
[cd7b81d]109 icb_login(is, group, nick, client);
110 break;
111 }
112 case ICB_M_OPEN: {
113 char *grpmsg;
114
115 grpmsg = icb_nextfield(&msg);
116 icb_groupmsg(is, grpmsg);
117 break;
118 }
119 case ICB_M_COMMAND: {
120 char *cmd, *arg;
121
122 cmd = icb_nextfield(&msg);
123 arg = icb_nextfield(&msg);
124 icb_command(is, cmd, arg);
125 break;
126 }
[1fb1bbe]127 case ICB_M_PONG: {
128 icb_sendfmt(is, "%c", ICB_M_PING);
129 break;
130 }
[cd7b81d]131 case ICB_M_PROTO:
132 case ICB_M_NOOP:
133 /* ignore */
134 break;
135 default:
136 /* everything else is not valid */
137 icb_error(is, "Bummer. This is a bummer, man.");
138 }
139}
140
141/*
142 * icb_login: handles login ('a') packets
143 */
144void
[626f420]145icb_login(struct icb_session *is, char *grp, char *nick, char *client)
[cd7b81d]146{
147 char *defgrp = "1";
148 struct icb_group *ig;
149 struct icb_session *s;
[626f420]150 char group[ICB_MAXGRPLEN];
[cd7b81d]151
[626f420]152 if (!nick || strlen(nick) == 0 ||
[b7bc432]153 icb_vis(is->nick, nick, ICB_MAXNICKLEN, VIS_SP)) {
[cd7b81d]154 icb_error(is, "Invalid nick");
155 icb_drop(is, NULL);
156 return;
157 }
[626f420]158 if (!grp || strlen(grp) == 0)
159 strlcpy(group, defgrp, ICB_MAXGRPLEN);
160 else
[b7bc432]161 icb_vis(group, grp, ICB_MAXNICKLEN, VIS_SP);
[cd7b81d]162 LIST_FOREACH(ig, &groups, entry) {
163 if (strcmp(ig->name, group) == 0)
164 break;
165 }
166 if (ig == NULL) {
167 if (!creategroups) {
168 icb_error(is, "Invalid group %s", group);
169 icb_drop(is, NULL);
170 return;
171 } else {
172 if ((ig = icb_addgroup(is, group, NULL)) == NULL) {
173 icb_error(is, "Can't create group %s", group);
174 return;
175 }
176 icb_log(NULL, LOG_DEBUG, "%s created group %s",
[626f420]177 is->nick, group);
[cd7b81d]178 }
179 }
180 LIST_FOREACH(s, &ig->sess, entry) {
[626f420]181 if (strcmp(s->nick, is->nick) == 0) {
[cd7b81d]182 icb_error(is, "Nick is already in use");
183 icb_drop(is, NULL);
184 return;
185 }
186 }
187
188 if (client && strlen(client) > 0)
[b7bc432]189 icb_vis(is->client, client, sizeof is->client, VIS_SP);
[cd7b81d]190 strlcpy(is->nick, nick, sizeof is->nick);
191 is->group = ig;
192 is->login = time(NULL);
193 is->last = getmonotime();
194
195 /* notify group */
196 icb_status_group(ig, NULL, STATUS_SIGNON, "%s (%s@%s) entered group",
197 is->nick, is->client, is->host);
198
199 CLRF(is->flags, ICB_SF_PROTOSENT);
200 SETF(is->flags, ICB_SF_LOGGEDIN);
201
202 LIST_INSERT_HEAD(&ig->sess, is, entry);
203
204 /* acknowledge successful login */
205 icb_sendfmt(is, "%c", ICB_M_LOGIN);
206
207 /* notify user */
208 icb_status(is, STATUS_STATUS, "You are now in group %s%s", ig->name,
[4284008]209 icb_ismod(ig, is) ? " as moderator" : "");
[cd7b81d]210
211 /* send user a topic name */
212 if (strlen(ig->topic) > 0)
213 icb_status(is, STATUS_TOPIC, "Topic for %s is \"%s\"",
214 ig->name, ig->topic);
215}
216
217/*
218 * icb_groupmsg: handles open message ('b') packets
219 */
220void
221icb_groupmsg(struct icb_session *is, char *msg)
222{
223 char buf[ICB_MSGSIZE];
224 struct icb_group *ig = is->group;
225 struct icb_session *s;
226 int buflen = 1;
227
228 if (strlen(msg) == 0) {
229 icb_error(is, "Empty message");
230 return;
231 }
232
233 buflen += snprintf(&buf[1], sizeof buf - 1, "%c%s%c%s", ICB_M_OPEN,
234 is->nick, ICB_M_SEP, msg);
235 buf[0] = buflen;
236
237 LIST_FOREACH(s, &ig->sess, entry) {
238 if (s == is)
239 continue;
240 icb_send(s, buf, buflen + 1);
241 }
242}
243
244/*
245 * icb_privmsg: handles personal message ('c') packets
246 */
247void
[626f420]248icb_privmsg(struct icb_session *is, char *to, char *msg)
[cd7b81d]249{
250 struct icb_group *ig = is->group;
251 struct icb_session *s;
[626f420]252 char whom[ICB_MAXNICKLEN];
253
[b7bc432]254 icb_vis(whom, to, ICB_MAXNICKLEN, VIS_SP);
[cd7b81d]255
[efa8586]256 /* try home group first */
[cd7b81d]257 LIST_FOREACH(s, &ig->sess, entry) {
258 if (strcmp(s->nick, whom) == 0)
259 break;
260 }
261 if (!s) {
[efa8586]262 /* try all groups until the first match */
263 LIST_FOREACH(ig, &groups, entry) {
264 LIST_FOREACH(s, &ig->sess, entry) {
265 if (strcmp(s->nick, whom) == 0)
266 break;
267 }
268 if (s)
269 break;
270 }
271 if (!s) {
272 icb_error(is, "No such user %s", whom);
273 return;
274 }
[cd7b81d]275 }
276 icb_sendfmt(s, "%c%s%c%s", ICB_M_PERSONAL, is->nick, ICB_M_SEP, msg);
277}
278
279/*
280 * icb_command: handles command ('h') packets
281 */
282void
283icb_command(struct icb_session *is, char *cmd, char *arg)
284{
285 void (*handler)(struct icb_session *, char *);
[626f420]286 char command[32]; /* XXX */
[cd7b81d]287
[b7bc432]288 icb_vis(command, cmd, sizeof command, VIS_SP);
[626f420]289
290 if ((handler = icb_cmd_lookup(command)) == NULL) {
291 icb_error(is, "Unsupported command: %s", command);
[cd7b81d]292 return;
293 }
294 handler(is, arg);
295}
296
297/*
298 * icb_cmdout: sends out command output ('i') packets, called from the
299 * command handlers
300 */
301void
302icb_cmdout(struct icb_session *is, int type, char *outmsg)
303{
304 char *otype = NULL;
305
306 switch (type) {
307 case CMDOUT_CO:
308 otype = "co";
309 break;
310 case CMDOUT_EC:
311 otype = "ec";
312 break;
313 case CMDOUT_WG:
314 otype = "wg";
315 break;
[4284008]316 case CMDOUT_WH:
317 otype = "wh";
318 break;
319 case CMDOUT_WL:
320 otype = "wl";
321 break;
[cd7b81d]322 default:
323 icb_log(is, LOG_ERR, "unknown cmdout type");
324 return;
325 }
[4284008]326 if (outmsg)
327 icb_sendfmt(is, "%c%s%c%s", ICB_M_CMDOUT, otype, ICB_M_SEP,
328 outmsg);
329 else
330 icb_sendfmt(is, "%c%s", ICB_M_CMDOUT, otype);
[cd7b81d]331}
332
333/*
334 * icb_status: sends a status message ('d') to the client
335 */
336void
337icb_status(struct icb_session *is, int type, const char *fmt, ...)
338{
339 va_list ap;
340 char buf[ICB_MSGSIZE];
341 int buflen = 1;
342 static const struct {
343 int type;
344 const char *msg;
345 } msgtab[] = {
346 { STATUS_ARRIVE, "Arrive" },
347 { STATUS_BOOT, "Boot" },
348 { STATUS_DEPART, "Depart" },
[9195a6a]349 { STATUS_HELP, "Help" },
[cd7b81d]350 { STATUS_NAME, "Name" },
[bf02a60]351 { STATUS_NOBEEP, "No-Beep" },
[cd7b81d]352 { STATUS_NOTIFY, "Notify" },
353 { STATUS_SIGNON, "Sign-on" },
354 { STATUS_SIGNOFF, "Sign-off" },
355 { STATUS_STATUS, "Status" },
356 { STATUS_TOPIC, "Topic" },
357 { STATUS_WARNING, "Warning" },
[1022119]358 { 0, NULL }
[cd7b81d]359 };
360
361 if (type < 0 || type > (int)nitems(msgtab) - 1)
362 return;
363 va_start(ap, fmt);
364 buflen += snprintf(&buf[1], sizeof buf - 1, "%c%s%c", ICB_M_STATUS,
365 msgtab[type].msg, ICB_M_SEP);
366 buflen += vsnprintf(&buf[buflen], sizeof buf - buflen, fmt, ap);
367 buf[0] = buflen;
368 va_end(ap);
369 icb_send(is, buf, buflen + 1);
370}
371
372/*
373 * icb_status: sends a status message ('d') to the group except of the
374 * "ex" if it's not NULL
375 */
376void
377icb_status_group(struct icb_group *ig, struct icb_session *ex, int type,
378 const char *fmt, ...)
379{
380 char buf[ICB_MSGSIZE];
381 va_list ap;
382 struct icb_session *s;
383
384 va_start(ap, fmt);
385 (void)vsnprintf(buf, sizeof buf, fmt, ap);
386 LIST_FOREACH(s, &ig->sess, entry) {
387 if (ex && s == ex)
388 continue;
389 icb_status(s, type, buf);
390 }
391 icb_log(NULL, LOG_DEBUG, "%s", buf);
392 va_end(ap);
393}
394
395/*
396 * icb_error: sends an error message ('e') to the client
397 */
398void
399icb_error(struct icb_session *is, const char *fmt, ...)
400{
401 char buf[ICB_MSGSIZE];
402 va_list ap;
403 int buflen = 1;
404
405 va_start(ap, fmt);
406 buflen += vsnprintf(&buf[2], sizeof buf - 2, fmt, ap);
407 va_end(ap);
408 buf[0] = ++buflen; /* account for ICB_M_ERROR */
409 buf[1] = ICB_M_ERROR;
410 icb_send(is, buf, buflen + 1);
411 icb_log(is, LOG_DEBUG, "%s", buf + 2);
412}
413
414/*
415 * icb_remove: removes a session from the associated group
416 */
417void
418icb_remove(struct icb_session *is, char *reason)
419{
420 if (is->group) {
[4284008]421 if (icb_ismod(is->group, is))
[cd7b81d]422 (void)icb_pass(is->group, is, NULL);
423 LIST_REMOVE(is, entry);
424 if (reason)
425 icb_status_group(is->group, NULL, STATUS_SIGNOFF,
426 "%s (%s@%s) just left: %s", is->nick, is->client,
427 is->host, reason);
428 else
429 icb_status_group(is->group, NULL, STATUS_SIGNOFF,
430 "%s (%s@%s) just left", is->nick, is->client,
431 is->host);
432 }
433}
434
435/*
436 * icb_addgroup: adds a new group to the list
437 */
438struct icb_group *
439icb_addgroup(struct icb_session *is, char *name, char *mpass)
440{
441 struct icb_group *ig;
442
443 if ((ig = calloc(1, sizeof *ig)) == NULL)
444 return (NULL);
445 strlcpy(ig->name, name, sizeof ig->name);
446 if (mpass)
447 strlcpy(ig->mpass, mpass, sizeof ig->mpass);
448 if (is)
[4284008]449 ig->mod = is;
[cd7b81d]450 LIST_INIT(&ig->sess);
451 LIST_INSERT_HEAD(&groups, ig, entry);
452 return (ig);
453}
454
455#ifdef notused
456/*
457 * icb_delgroup: removes a group from the list
458 */
459void
460icb_delgroup(struct icb_group *ig)
461{
462 struct icb_session *s;
463
464 /* well, i guess we should kick out participants! ;-) */
465 LIST_FOREACH(s, &ig->sess, entry) {
466 icb_status(s, STATUS_WARNING, "Group dismissed");
467 s->group = NULL;
468 }
469 LIST_REMOVE(ig, entry);
470 bzero(ig, sizeof ig); /* paranoic thing, obviously */
471 free(ig);
472}
473#endif
474
475/*
[4284008]476 * icb_dowho: a helper function that sends out a group header as a command
477 * output and user information in the "wl" format
[cd7b81d]478 */
[4284008]479int
480icb_dowho(struct icb_session *is, struct icb_group *ig)
[cd7b81d]481{
482 char buf[ICB_MSGSIZE];
483 struct icb_session *s;
[4284008]484 int nusers = 0;
[cd7b81d]485
[4284008]486 icb_cmdout(is, CMDOUT_CO, " ");
487 snprintf(buf, sizeof buf, "Group: %-8s (%cvl) Mod: %-13s Topic: %s",
488 ig->name, ig->mod ? 'm' : 'p', ig->mod ? ig->mod->nick : "(None)",
489 strlen(ig->topic) > 0 ? ig->topic : "(None)");
490 icb_cmdout(is, CMDOUT_CO, buf);
[cd7b81d]491 LIST_FOREACH(s, &ig->sess, entry) {
492 (void)snprintf(buf, sizeof buf,
[bf02a60]493 "%c%c%s%c%lld%c0%c%lld%c%s%c%s%c%s",
[4284008]494 icb_ismod(ig, s) ? 'm' : ' ', ICB_M_SEP,
[cd7b81d]495 s->nick, ICB_M_SEP, getmonotime() - s->last,
496 ICB_M_SEP, ICB_M_SEP, s->login, ICB_M_SEP,
497 s->client, ICB_M_SEP, s->host, ICB_M_SEP, " ");
498 icb_cmdout(is, CMDOUT_WL, buf);
[4284008]499 nusers++;
[cd7b81d]500 }
[4284008]501 return (nusers);
502}
503
504/*
505 * icb_who: sends a list of users of either the specified group or all
506 * groups found on the server
507 */
508void
509icb_who(struct icb_session *is, struct icb_group *ig)
510{
511 char buf[ICB_MSGSIZE];
512 struct icb_group *g;
513
514 if (!ig) {
515 int nusers = 0, ngroups = 0;
516
517 LIST_FOREACH(g, &groups, entry) {
518 nusers += icb_dowho(is, g);
519 ngroups++;
520 }
521 if (nusers > 0) {
522 (void)snprintf(buf, sizeof buf,
523 "Total: %d %s in %d %s",
524 nusers, nusers > 1 ? "users" : "user",
525 ngroups, ngroups > 1 ? "groups" : "group");
526 } else
527 (void)snprintf(buf, sizeof buf, "No users found.");
528 icb_cmdout(is, CMDOUT_CO, buf);
529 } else
530 (void)icb_dowho(is, ig);
[cd7b81d]531}
532
533/*
[4284008]534 * icb_ismod: checks whether group is moderated by "is"
[cd7b81d]535 */
[626f420]536inline int
[4284008]537icb_ismod(struct icb_group *ig, struct icb_session *is)
[cd7b81d]538{
[626f420]539 return (ig->mod == is);
[cd7b81d]540}
541
[1d2125a]542/*
543 * icb_modpermit: checks user against the moderators table if it has
544 * been populated
545 */
546int
547icb_modpermit(struct icb_session *is)
548{
549 extern char modtab[ICB_MTABLEN][ICB_MAXNICKLEN];
550 extern int modtabcnt;
551
552 if (modtabcnt == 0 ||
553 bsearch(is->nick, modtab, modtabcnt, ICB_MAXNICKLEN,
554 (int (*)(const void *, const void *))strcmp))
555 return (1);
556 return (0);
557}
558
[cd7b81d]559/*
560 * icb_pass: passes moderation of group "ig" from "from" to "to",
561 * returns -1 if "from" is not a moderator, 1 if passed
562 * to "to" and 0 otherwise (no moderator or passed to the
563 * internal bot)
564 */
565int
566icb_pass(struct icb_group *ig, struct icb_session *from,
567 struct icb_session *to)
568{
[4284008]569 if (ig->mod && ig->mod != from)
[cd7b81d]570 return (-1);
571 if (!from && !to)
572 return (-1);
[1d2125a]573 if (to && !icb_modpermit(to))
574 return (-1);
[4284008]575 ig->mod = to;
[cd7b81d]576 if (to)
577 icb_status(to, STATUS_NOTIFY, "%s just passed you moderation"
578 " of %s", from ? from->nick : "server", ig->name);
579 icb_status_group(ig, to, STATUS_NOTIFY, "%s has passed moderation "
580 "to %s", from ? from->nick : "server", to ? to->nick : "server");
581 return (1);
582}
583
584/*
[4284008]585 * icb_nextfield: advances through a given buffer returning pointer to the
[a202ff1]586 * beginning of the icb field or an empty string otherwise;
587 * cleans up trailing spaces
[cd7b81d]588 */
589char *
590icb_nextfield(char **buf)
591{
592 char *start = *buf;
[a202ff1]593 char *end = NULL;
[cd7b81d]594
595 while (*buf && **buf != '\0' && **buf != ICB_M_SEP)
596 (*buf)++;
597 if (*buf && **buf == ICB_M_SEP) {
598 **buf = '\0';
[a202ff1]599 end = *buf;
[cd7b81d]600 (*buf)++;
[a202ff1]601 } else
602 end = *buf;
603 while (end && *(--end) == ' ' && end > start)
604 *end = '\0';
[cd7b81d]605 return (start);
606}
607
608/*
609 * icb_sendfmt: formats a string and sends it over
610 */
611void
612icb_sendfmt(struct icb_session *is, const char *fmt, ...)
613{
614 char buf[ICB_MSGSIZE];
615 va_list ap;
616 int buflen = 1;
617
618 va_start(ap, fmt);
619 buflen += vsnprintf(&buf[1], sizeof buf - 1, fmt, ap);
620 va_end(ap);
621 buf[0] = buflen;
622 icb_send(is, buf, buflen + 1);
623}
[626f420]624
625/*
626 * icb_vis: strnvis-like function that escapes percentages as well
627 */
628int
[b7bc432]629icb_vis(char *dst, const char *src, size_t dstsize, int flags)
[626f420]630{
631 int si = 0, di = 0, td;
632
633 while ((size_t)di < dstsize && src[si] != '\0') {
634 if (src[si] == '%')
635 dst[di++] = '%', dst[di] = '%';
[b7bc432]636 else if (src[si] == ' ' && flags & VIS_SP)
637 dst[di] = '_';
638 else if (isgraph(src[si]) || src[si] == ' ')
[626f420]639 dst[di] = src[si];
640 else {
641 td = snprintf(&dst[di], dstsize - di,
642 "\\%03o", (unsigned char)src[si]);
643 di += td - 1;
644 }
645 si++, di++;
646 }
647 dst[MIN((size_t)di, dstsize)] = '\0';
648 return (0);
649}
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