| 1 |
/* |
| 2 |
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
| 3 |
* |
| 4 |
* Copyright (c) 1997-2015 ircd-hybrid development team |
| 5 |
* |
| 6 |
* This program is free software; you can redistribute it and/or modify |
| 7 |
* it under the terms of the GNU General Public License as published by |
| 8 |
* the Free Software Foundation; either version 2 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
| 19 |
* USA |
| 20 |
*/ |
| 21 |
|
| 22 |
/*! \file user.c |
| 23 |
* \brief User related functions. |
| 24 |
* \version $Id$ |
| 25 |
*/ |
| 26 |
|
| 27 |
#include "stdinc.h" |
| 28 |
#include "list.h" |
| 29 |
#include "user.h" |
| 30 |
#include "channel.h" |
| 31 |
#include "channel_mode.h" |
| 32 |
#include "client.h" |
| 33 |
#include "hash.h" |
| 34 |
#include "id.h" |
| 35 |
#include "irc_string.h" |
| 36 |
#include "ircd.h" |
| 37 |
#include "listener.h" |
| 38 |
#include "motd.h" |
| 39 |
#include "numeric.h" |
| 40 |
#include "conf.h" |
| 41 |
#include "log.h" |
| 42 |
#include "server.h" |
| 43 |
#include "send.h" |
| 44 |
#include "memory.h" |
| 45 |
#include "packet.h" |
| 46 |
#include "rng_mt.h" |
| 47 |
#include "userhost.h" |
| 48 |
#include "misc.h" |
| 49 |
#include "parse.h" |
| 50 |
#include "watch.h" |
| 51 |
#include "isupport.h" |
| 52 |
|
| 53 |
static char umode_buffer[IRCD_BUFSIZE]; |
| 54 |
|
| 55 |
const struct user_modes *umode_map[256]; |
| 56 |
const struct user_modes umode_tab[] = |
| 57 |
{ |
| 58 |
{ 'D', UMODE_DEAF }, |
| 59 |
{ 'F', UMODE_FARCONNECT }, |
| 60 |
{ 'G', UMODE_SOFTCALLERID }, |
| 61 |
{ 'H', UMODE_HIDDEN }, |
| 62 |
{ 'R', UMODE_REGONLY }, |
| 63 |
{ 'S', UMODE_SSL }, |
| 64 |
{ 'W', UMODE_WEBIRC }, |
| 65 |
{ 'a', UMODE_ADMIN }, |
| 66 |
{ 'b', UMODE_BOTS }, |
| 67 |
{ 'c', UMODE_CCONN }, |
| 68 |
{ 'd', UMODE_DEBUG }, |
| 69 |
{ 'e', UMODE_EXTERNAL }, |
| 70 |
{ 'f', UMODE_FULL }, |
| 71 |
{ 'g', UMODE_CALLERID }, |
| 72 |
{ 'i', UMODE_INVISIBLE }, |
| 73 |
{ 'j', UMODE_REJ }, |
| 74 |
{ 'k', UMODE_SKILL }, |
| 75 |
{ 'l', UMODE_LOCOPS }, |
| 76 |
{ 'n', UMODE_NCHANGE }, |
| 77 |
{ 'o', UMODE_OPER }, |
| 78 |
{ 'p', UMODE_HIDECHANS }, |
| 79 |
{ 'q', UMODE_HIDEIDLE }, |
| 80 |
{ 'r', UMODE_REGISTERED }, |
| 81 |
{ 's', UMODE_SERVNOTICE }, |
| 82 |
{ 'u', UMODE_UNAUTH }, |
| 83 |
{ 'w', UMODE_WALLOP }, |
| 84 |
{ 'x', UMODE_HIDDENHOST }, |
| 85 |
{ 'y', UMODE_SPY }, |
| 86 |
{ '\0', 0 } |
| 87 |
}; |
| 88 |
|
| 89 |
void |
| 90 |
user_modes_init(void) |
| 91 |
{ |
| 92 |
char *umode_buffer_ptr = umode_buffer; |
| 93 |
|
| 94 |
for (const struct user_modes *tab = umode_tab; tab->c; ++tab) |
| 95 |
{ |
| 96 |
umode_map[tab->c] = tab; |
| 97 |
*umode_buffer_ptr++ = tab->c; |
| 98 |
} |
| 99 |
|
| 100 |
*umode_buffer_ptr = '\0'; |
| 101 |
} |
| 102 |
|
| 103 |
/* show_lusers() |
| 104 |
* |
| 105 |
* inputs - pointer to client |
| 106 |
* output - NONE |
| 107 |
* side effects - display to client user counts etc. |
| 108 |
*/ |
| 109 |
void |
| 110 |
show_lusers(struct Client *source_p) |
| 111 |
{ |
| 112 |
if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER)) |
| 113 |
sendto_one_numeric(source_p, &me, RPL_LUSERCLIENT, (Count.total - Count.invisi), |
| 114 |
Count.invisi, dlink_list_length(&global_server_list)); |
| 115 |
else |
| 116 |
sendto_one_numeric(source_p, &me, RPL_LUSERCLIENT, (Count.total - Count.invisi), |
| 117 |
Count.invisi, 1); |
| 118 |
|
| 119 |
if (Count.oper) |
| 120 |
sendto_one_numeric(source_p, &me, RPL_LUSEROP, Count.oper); |
| 121 |
|
| 122 |
if (dlink_list_length(&unknown_list)) |
| 123 |
sendto_one_numeric(source_p, &me, RPL_LUSERUNKNOWN, dlink_list_length(&unknown_list)); |
| 124 |
|
| 125 |
if (dlink_list_length(&channel_list)) |
| 126 |
sendto_one_numeric(source_p, &me, RPL_LUSERCHANNELS, dlink_list_length(&channel_list)); |
| 127 |
|
| 128 |
if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER)) |
| 129 |
{ |
| 130 |
sendto_one_numeric(source_p, &me, RPL_LUSERME, Count.local, Count.myserver); |
| 131 |
sendto_one_numeric(source_p, &me, RPL_LOCALUSERS, Count.local, Count.max_loc); |
| 132 |
} |
| 133 |
else |
| 134 |
{ |
| 135 |
sendto_one_numeric(source_p, &me, RPL_LUSERME, Count.total, 0); |
| 136 |
sendto_one_numeric(source_p, &me, RPL_LOCALUSERS, Count.total, Count.max_tot); |
| 137 |
} |
| 138 |
|
| 139 |
sendto_one_numeric(source_p, &me, RPL_GLOBALUSERS, Count.total, Count.max_tot); |
| 140 |
|
| 141 |
if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER)) |
| 142 |
sendto_one_numeric(source_p, &me, RPL_STATSCONN, Count.max_loc_con, |
| 143 |
Count.max_loc_cli, Count.totalrestartcount); |
| 144 |
|
| 145 |
if (Count.local > Count.max_loc_cli) |
| 146 |
Count.max_loc_cli = Count.local; |
| 147 |
|
| 148 |
if ((Count.local + Count.myserver) > Count.max_loc_con) |
| 149 |
Count.max_loc_con = Count.local + Count.myserver; |
| 150 |
} |
| 151 |
|
| 152 |
/* report_and_set_user_flags() |
| 153 |
* |
| 154 |
* inputs - pointer to source_p |
| 155 |
* - pointer to conf for this user |
| 156 |
* output - NONE |
| 157 |
* side effects - Report to user any special flags |
| 158 |
* they are getting, and set them. |
| 159 |
*/ |
| 160 |
static void |
| 161 |
report_and_set_user_flags(struct Client *source_p, const struct MaskItem *conf) |
| 162 |
{ |
| 163 |
/* If this user is being spoofed, tell them so */ |
| 164 |
if (IsConfDoSpoofIp(conf)) |
| 165 |
sendto_one_notice(source_p, &me, ":*** Spoofing your IP. Congrats."); |
| 166 |
|
| 167 |
/* If this user is in the exception class, set it "E lined" */ |
| 168 |
if (IsConfExemptKline(conf)) |
| 169 |
{ |
| 170 |
AddFlag(source_p, FLAGS_EXEMPTKLINE); |
| 171 |
sendto_one_notice(source_p, &me, ":*** You are exempt from K/D lines. Congrats."); |
| 172 |
} |
| 173 |
|
| 174 |
if (IsConfExemptXline(conf)) |
| 175 |
{ |
| 176 |
AddFlag(source_p, FLAGS_EXEMPTXLINE); |
| 177 |
sendto_one_notice(source_p, &me, ":*** You are exempt from X lines. Congrats."); |
| 178 |
} |
| 179 |
|
| 180 |
if (IsConfExemptResv(conf)) |
| 181 |
{ |
| 182 |
AddFlag(source_p, FLAGS_EXEMPTRESV); |
| 183 |
sendto_one_notice(source_p, &me, ":*** You are exempt from resvs. Congrats."); |
| 184 |
} |
| 185 |
|
| 186 |
/* If this user is exempt from user limits set it "F lined" */ |
| 187 |
if (IsConfExemptLimits(conf)) |
| 188 |
{ |
| 189 |
AddFlag(source_p, FLAGS_NOLIMIT); |
| 190 |
sendto_one_notice(source_p, &me, ":*** You are exempt from user limits. Congrats."); |
| 191 |
} |
| 192 |
|
| 193 |
if (IsConfCanFlood(conf)) |
| 194 |
{ |
| 195 |
AddFlag(source_p, FLAGS_CANFLOOD); |
| 196 |
sendto_one_notice(source_p, &me, ":*** You are exempt from flood " |
| 197 |
"protection, aren't you fearsome."); |
| 198 |
} |
| 199 |
} |
| 200 |
|
| 201 |
/* introduce_client() |
| 202 |
* |
| 203 |
* inputs - source_p |
| 204 |
* output - NONE |
| 205 |
* side effects - This common function introduces a client to the rest |
| 206 |
* of the net, either from a local client connect or |
| 207 |
* from a remote connect. |
| 208 |
*/ |
| 209 |
static void |
| 210 |
introduce_client(struct Client *source_p) |
| 211 |
{ |
| 212 |
dlink_node *node = NULL; |
| 213 |
char ubuf[IRCD_BUFSIZE] = ""; |
| 214 |
|
| 215 |
if (MyClient(source_p)) |
| 216 |
send_umode(source_p, source_p, 0, ubuf); |
| 217 |
else |
| 218 |
send_umode(NULL, source_p, 0, ubuf); |
| 219 |
|
| 220 |
watch_check_hash(source_p, RPL_LOGON); |
| 221 |
|
| 222 |
if (ubuf[0] == '\0') |
| 223 |
{ |
| 224 |
ubuf[0] = '+'; |
| 225 |
ubuf[1] = '\0'; |
| 226 |
} |
| 227 |
|
| 228 |
DLINK_FOREACH(node, local_server_list.head) |
| 229 |
{ |
| 230 |
struct Client *server = node->data; |
| 231 |
|
| 232 |
if (server == source_p->from) |
| 233 |
continue; |
| 234 |
|
| 235 |
if (IsCapable(server, CAPAB_SVS)) |
| 236 |
sendto_one(server, ":%s UID %s %u %lu %s %s %s %s %s %s :%s", |
| 237 |
source_p->servptr->id, |
| 238 |
source_p->name, source_p->hopcount+1, |
| 239 |
(unsigned long)source_p->tsinfo, |
| 240 |
ubuf, source_p->username, source_p->host, |
| 241 |
source_p->sockhost, source_p->id, |
| 242 |
source_p->account, |
| 243 |
source_p->info); |
| 244 |
else |
| 245 |
sendto_one(server, ":%s UID %s %u %lu %s %s %s %s %s :%s", |
| 246 |
source_p->servptr->id, |
| 247 |
source_p->name, source_p->hopcount+1, |
| 248 |
(unsigned long)source_p->tsinfo, |
| 249 |
ubuf, source_p->username, source_p->host, |
| 250 |
source_p->sockhost, source_p->id, source_p->info); |
| 251 |
|
| 252 |
if (!EmptyString(source_p->certfp)) |
| 253 |
sendto_one(server, ":%s CERTFP %s", source_p->id, source_p->certfp); |
| 254 |
} |
| 255 |
} |
| 256 |
|
| 257 |
/* user_welcome() |
| 258 |
* |
| 259 |
* inputs - client pointer to client to welcome |
| 260 |
* output - NONE |
| 261 |
* side effects - |
| 262 |
*/ |
| 263 |
static void |
| 264 |
user_welcome(struct Client *source_p) |
| 265 |
{ |
| 266 |
static const char built_date[] = __DATE__ " at " __TIME__; |
| 267 |
|
| 268 |
#ifdef HAVE_LIBCRYPTO |
| 269 |
if (HasFlag(source_p, FLAGS_SSL)) |
| 270 |
{ |
| 271 |
AddUMode(source_p, UMODE_SSL); |
| 272 |
sendto_one_notice(source_p, &me, ":*** Connected securely via %s", |
| 273 |
ssl_get_cipher(source_p->connection->fd.ssl)); |
| 274 |
} |
| 275 |
#endif |
| 276 |
|
| 277 |
sendto_one_numeric(source_p, &me, RPL_WELCOME, ConfigServerInfo.network_name, |
| 278 |
source_p->name); |
| 279 |
sendto_one_numeric(source_p, &me, RPL_YOURHOST, |
| 280 |
listener_get_name(source_p->connection->listener), ircd_version); |
| 281 |
sendto_one_numeric(source_p, &me, RPL_CREATED, built_date); |
| 282 |
sendto_one_numeric(source_p, &me, RPL_MYINFO, me.name, ircd_version, umode_buffer); |
| 283 |
|
| 284 |
isupport_show(source_p); |
| 285 |
show_lusers(source_p); |
| 286 |
motd_signon(source_p); |
| 287 |
} |
| 288 |
|
| 289 |
/* check_xline() |
| 290 |
* |
| 291 |
* inputs - pointer to client to test |
| 292 |
* outupt - 1 if exiting 0 if ok |
| 293 |
* side effects - |
| 294 |
*/ |
| 295 |
static int |
| 296 |
check_xline(struct Client *source_p) |
| 297 |
{ |
| 298 |
struct MaskItem *conf = NULL; |
| 299 |
|
| 300 |
if (HasFlag(source_p, FLAGS_EXEMPTXLINE)) |
| 301 |
return 0; |
| 302 |
|
| 303 |
if ((conf = find_matching_name_conf(CONF_XLINE, source_p->info, NULL, NULL, 0))) |
| 304 |
{ |
| 305 |
++conf->count; |
| 306 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
| 307 |
"X-line Rejecting [%s] [%s], user %s [%s]", |
| 308 |
source_p->info, conf->reason, |
| 309 |
get_client_name(source_p, HIDE_IP), |
| 310 |
source_p->sockhost); |
| 311 |
|
| 312 |
++ServerStats.is_ref; |
| 313 |
exit_client(source_p, "Bad user info"); |
| 314 |
return 1; |
| 315 |
} |
| 316 |
|
| 317 |
return 0; |
| 318 |
} |
| 319 |
|
| 320 |
/*! \brief This function is called when both NICK and USER messages |
| 321 |
* have been accepted for the client, in whatever order. Only |
| 322 |
* after this, is the UID message propagated. |
| 323 |
* \param source_p Pointer to given client to introduce |
| 324 |
*/ |
| 325 |
void |
| 326 |
register_local_user(struct Client *source_p) |
| 327 |
{ |
| 328 |
const char *id = NULL; |
| 329 |
const struct MaskItem *conf = NULL; |
| 330 |
|
| 331 |
assert(source_p == source_p->from); |
| 332 |
assert(MyConnect(source_p)); |
| 333 |
assert(IsUnknown(source_p)); |
| 334 |
assert(!source_p->connection->registration); |
| 335 |
|
| 336 |
if (ConfigGeneral.ping_cookie) |
| 337 |
{ |
| 338 |
if (!HasFlag(source_p, FLAGS_PINGSENT) && !source_p->connection->random_ping) |
| 339 |
{ |
| 340 |
do |
| 341 |
source_p->connection->random_ping = genrand_int32(); |
| 342 |
while (!source_p->connection->random_ping); |
| 343 |
|
| 344 |
sendto_one(source_p, "PING :%u", source_p->connection->random_ping); |
| 345 |
AddFlag(source_p, FLAGS_PINGSENT); |
| 346 |
return; |
| 347 |
} |
| 348 |
|
| 349 |
if (!HasFlag(source_p, FLAGS_PING_COOKIE)) |
| 350 |
return; |
| 351 |
} |
| 352 |
|
| 353 |
source_p->connection->last_privmsg = CurrentTime; |
| 354 |
/* Straight up the maximum rate of flooding... */ |
| 355 |
source_p->connection->allow_read = MAX_FLOOD_BURST; |
| 356 |
|
| 357 |
if (!check_client(source_p)) |
| 358 |
return; |
| 359 |
|
| 360 |
if (!valid_hostname(source_p->host)) |
| 361 |
{ |
| 362 |
sendto_one_notice(source_p, &me, ":*** Notice -- You have an illegal " |
| 363 |
"character in your hostname"); |
| 364 |
strlcpy(source_p->host, source_p->sockhost, sizeof(source_p->host)); |
| 365 |
} |
| 366 |
|
| 367 |
conf = source_p->connection->confs.head->data; |
| 368 |
|
| 369 |
if (!HasFlag(source_p, FLAGS_GOTID)) |
| 370 |
{ |
| 371 |
char username[USERLEN + 1] = ""; |
| 372 |
unsigned int i = 0; |
| 373 |
|
| 374 |
if (IsNeedIdentd(conf)) |
| 375 |
{ |
| 376 |
++ServerStats.is_ref; |
| 377 |
sendto_one_notice(source_p, &me, ":*** Notice -- You need to install " |
| 378 |
"identd to use this server"); |
| 379 |
exit_client(source_p, "Install identd"); |
| 380 |
return; |
| 381 |
} |
| 382 |
|
| 383 |
strlcpy(username, source_p->username, sizeof(username)); |
| 384 |
|
| 385 |
if (!IsNoTilde(conf)) |
| 386 |
source_p->username[i++] = '~'; |
| 387 |
|
| 388 |
for (const char *p = username; *p && i < USERLEN; ++p) |
| 389 |
source_p->username[i++] = *p; |
| 390 |
|
| 391 |
source_p->username[i] = '\0'; |
| 392 |
} |
| 393 |
|
| 394 |
/* Password check */ |
| 395 |
if (!EmptyString(conf->passwd)) |
| 396 |
{ |
| 397 |
if (!match_conf_password(source_p->connection->password, conf)) |
| 398 |
{ |
| 399 |
++ServerStats.is_ref; |
| 400 |
|
| 401 |
sendto_one_numeric(source_p, &me, ERR_PASSWDMISMATCH); |
| 402 |
exit_client(source_p, "Bad Password"); |
| 403 |
return; |
| 404 |
} |
| 405 |
} |
| 406 |
|
| 407 |
/* |
| 408 |
* Don't free source_p->connection->password here - it can be required |
| 409 |
* by masked /stats I if there are auth {} blocks with need_password = no; |
| 410 |
* --adx |
| 411 |
*/ |
| 412 |
|
| 413 |
/* |
| 414 |
* Report if user has &^>= etc. and set flags as needed in source_p |
| 415 |
*/ |
| 416 |
report_and_set_user_flags(source_p, conf); |
| 417 |
|
| 418 |
if (IsDead(source_p)) |
| 419 |
return; |
| 420 |
|
| 421 |
/* |
| 422 |
* Limit clients - |
| 423 |
* We want to be able to have servers and F-line clients |
| 424 |
* connect, so save room for "buffer" connections. |
| 425 |
* Smaller servers may want to decrease this, and it should |
| 426 |
* probably be just a percentage of the MAXCLIENTS... |
| 427 |
* -Taner |
| 428 |
*/ |
| 429 |
if ((Count.local >= GlobalSetOptions.maxclients + MAX_BUFFER) || |
| 430 |
(Count.local >= GlobalSetOptions.maxclients && !HasFlag(source_p, FLAGS_NOLIMIT))) |
| 431 |
{ |
| 432 |
sendto_realops_flags(UMODE_FULL, L_ALL, SEND_NOTICE, |
| 433 |
"Too many clients, rejecting %s[%s].", |
| 434 |
source_p->name, source_p->host); |
| 435 |
++ServerStats.is_ref; |
| 436 |
exit_client(source_p, "Sorry, server is full - try later"); |
| 437 |
return; |
| 438 |
} |
| 439 |
|
| 440 |
if (!valid_username(source_p->username, 1)) |
| 441 |
{ |
| 442 |
char buf[IRCD_BUFSIZE] = ""; |
| 443 |
|
| 444 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
| 445 |
"Invalid username: %s (%s@%s)", |
| 446 |
source_p->name, source_p->username, source_p->host); |
| 447 |
++ServerStats.is_ref; |
| 448 |
snprintf(buf, sizeof(buf), "Invalid username [%s]", source_p->username); |
| 449 |
exit_client(source_p, buf); |
| 450 |
return; |
| 451 |
} |
| 452 |
|
| 453 |
if (check_xline(source_p)) |
| 454 |
return; |
| 455 |
|
| 456 |
while (hash_find_id((id = uid_get()))) |
| 457 |
; |
| 458 |
|
| 459 |
strlcpy(source_p->id, id, sizeof(source_p->id)); |
| 460 |
hash_add_id(source_p); |
| 461 |
|
| 462 |
sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE, |
| 463 |
"Client connecting: %s (%s@%s) [%s] {%s} [%s] <%s>", |
| 464 |
source_p->name, source_p->username, source_p->host, |
| 465 |
source_p->sockhost, |
| 466 |
get_client_class(&source_p->connection->confs), |
| 467 |
source_p->info, source_p->id); |
| 468 |
|
| 469 |
if (ConfigGeneral.invisible_on_connect) |
| 470 |
{ |
| 471 |
AddUMode(source_p, UMODE_INVISIBLE); |
| 472 |
++Count.invisi; |
| 473 |
} |
| 474 |
|
| 475 |
if (++Count.local > Count.max_loc) |
| 476 |
{ |
| 477 |
Count.max_loc = Count.local; |
| 478 |
|
| 479 |
if (!(Count.max_loc % 10)) |
| 480 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
| 481 |
"New maximum local client connections: %u", |
| 482 |
Count.max_loc); |
| 483 |
} |
| 484 |
|
| 485 |
if (++Count.total > Count.max_tot) |
| 486 |
Count.max_tot = Count.total; |
| 487 |
++Count.totalrestartcount; |
| 488 |
|
| 489 |
assert(source_p->servptr == &me); |
| 490 |
SetClient(source_p); |
| 491 |
dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list); |
| 492 |
dlinkAdd(source_p, &source_p->node, &global_client_list); |
| 493 |
|
| 494 |
assert(dlinkFind(&unknown_list, source_p)); |
| 495 |
|
| 496 |
dlink_move_node(&source_p->connection->lclient_node, |
| 497 |
&unknown_list, &local_client_list); |
| 498 |
|
| 499 |
user_welcome(source_p); |
| 500 |
userhost_add(source_p->username, source_p->host, 0); |
| 501 |
AddFlag(source_p, FLAGS_USERHOST); |
| 502 |
|
| 503 |
introduce_client(source_p); |
| 504 |
} |
| 505 |
|
| 506 |
/* register_remote_user() |
| 507 |
* |
| 508 |
* inputs - source_p remote or directly connected client |
| 509 |
* - username to register as |
| 510 |
* - host name to register as |
| 511 |
* - server name |
| 512 |
* output - NONE |
| 513 |
* side effects - This function is called when a remote client |
| 514 |
* is introduced by a server. |
| 515 |
*/ |
| 516 |
void |
| 517 |
register_remote_user(struct Client *source_p) |
| 518 |
{ |
| 519 |
const struct Client *target_p = NULL; |
| 520 |
|
| 521 |
if ((target_p = source_p->servptr) && target_p->from != source_p->from) |
| 522 |
{ |
| 523 |
sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, |
| 524 |
"Bad User [%s] :%s USER %s@%s %s, != %s[%s]", |
| 525 |
source_p->from->name, source_p->name, source_p->username, |
| 526 |
source_p->host, source_p->servptr->name, |
| 527 |
target_p->name, target_p->from->name); |
| 528 |
sendto_one(source_p->from, |
| 529 |
":%s KILL %s :%s (UID from wrong direction (%s != %s))", |
| 530 |
me.id, source_p->id, me.name, source_p->servptr->name, |
| 531 |
target_p->from->name); |
| 532 |
|
| 533 |
AddFlag(source_p, FLAGS_KILLED); |
| 534 |
exit_client(source_p, "UID server wrong direction"); |
| 535 |
return; |
| 536 |
} |
| 537 |
|
| 538 |
/* |
| 539 |
* If the nick has been introduced by a services server, |
| 540 |
* make it a service as well. |
| 541 |
*/ |
| 542 |
if (HasFlag(source_p->servptr, FLAGS_SERVICE)) |
| 543 |
AddFlag(source_p, FLAGS_SERVICE); |
| 544 |
|
| 545 |
if (++Count.total > Count.max_tot) |
| 546 |
Count.max_tot = Count.total; |
| 547 |
|
| 548 |
SetClient(source_p); |
| 549 |
dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list); |
| 550 |
dlinkAdd(source_p, &source_p->node, &global_client_list); |
| 551 |
userhost_add(source_p->username, source_p->host, 1); |
| 552 |
AddFlag(source_p, FLAGS_USERHOST); |
| 553 |
|
| 554 |
if (HasFlag(source_p->servptr, FLAGS_EOB)) |
| 555 |
sendto_realops_flags(UMODE_FARCONNECT, L_ALL, SEND_NOTICE, |
| 556 |
"Client connecting at %s: %s (%s@%s) [%s] [%s] <%s>", |
| 557 |
source_p->servptr->name, |
| 558 |
source_p->name, source_p->username, source_p->host, |
| 559 |
source_p->sockhost, source_p->info, source_p->id); |
| 560 |
|
| 561 |
introduce_client(source_p); |
| 562 |
} |
| 563 |
|
| 564 |
/* valid_hostname() |
| 565 |
* |
| 566 |
* Inputs - pointer to hostname |
| 567 |
* Output - 1 if valid, 0 if not |
| 568 |
* Side effects - check hostname for validity |
| 569 |
* |
| 570 |
* NOTE: this doesn't allow a hostname to begin with a dot and |
| 571 |
* will not allow more dots than chars. |
| 572 |
*/ |
| 573 |
int |
| 574 |
valid_hostname(const char *hostname) |
| 575 |
{ |
| 576 |
const char *p = hostname; |
| 577 |
|
| 578 |
assert(p); |
| 579 |
|
| 580 |
if (EmptyString(p) || *p == '.' || *p == ':') |
| 581 |
return 0; |
| 582 |
|
| 583 |
for (; *p; ++p) |
| 584 |
if (!IsHostChar(*p)) |
| 585 |
return 0; |
| 586 |
|
| 587 |
return p - hostname <= HOSTLEN; |
| 588 |
} |
| 589 |
|
| 590 |
/* valid_username() |
| 591 |
* |
| 592 |
* Inputs - pointer to user |
| 593 |
* Output - 1 if valid, 0 if not |
| 594 |
* Side effects - check username for validity |
| 595 |
* |
| 596 |
* Absolutely always reject any '*' '!' '?' '@' in an user name |
| 597 |
* reject any odd control characters names. |
| 598 |
* Allow '.' in username to allow for "first.last" |
| 599 |
* style of username |
| 600 |
*/ |
| 601 |
int |
| 602 |
valid_username(const char *username, const int local) |
| 603 |
{ |
| 604 |
unsigned int dots = 0; |
| 605 |
const char *p = username; |
| 606 |
|
| 607 |
assert(p); |
| 608 |
|
| 609 |
if (*p == '~') |
| 610 |
++p; |
| 611 |
|
| 612 |
/* |
| 613 |
* Reject usernames that don't start with an alphanum |
| 614 |
* i.e. reject jokers who have '-@somehost' or '.@somehost' |
| 615 |
* or "-hi-@somehost", "h-----@somehost" would still be accepted. |
| 616 |
*/ |
| 617 |
if (!IsAlNum(*p)) |
| 618 |
return 0; |
| 619 |
|
| 620 |
if (local) |
| 621 |
{ |
| 622 |
while (*++p) |
| 623 |
{ |
| 624 |
if (*p == '.' && ConfigGeneral.dots_in_ident) |
| 625 |
{ |
| 626 |
if (++dots > ConfigGeneral.dots_in_ident) |
| 627 |
return 0; |
| 628 |
if (!IsUserChar(*(p + 1))) |
| 629 |
return 0; |
| 630 |
} |
| 631 |
else if (!IsUserChar(*p)) |
| 632 |
return 0; |
| 633 |
} |
| 634 |
} |
| 635 |
else |
| 636 |
{ |
| 637 |
while (*++p) |
| 638 |
if (!IsUserChar(*p)) |
| 639 |
return 0; |
| 640 |
} |
| 641 |
|
| 642 |
return p - username <= USERLEN; |
| 643 |
} |
| 644 |
|
| 645 |
/* clean_nick_name() |
| 646 |
* |
| 647 |
* input - nickname |
| 648 |
* - whether it's a local nick (1) or remote (0) |
| 649 |
* output - none |
| 650 |
* side effects - walks through the nickname, returning 0 if erroneous |
| 651 |
*/ |
| 652 |
int |
| 653 |
valid_nickname(const char *nickname, const int local) |
| 654 |
{ |
| 655 |
const char *p = nickname; |
| 656 |
|
| 657 |
assert(p); |
| 658 |
|
| 659 |
/* |
| 660 |
* Nicks can't start with a digit or - or be 0 length. |
| 661 |
*/ |
| 662 |
if (EmptyString(p) || *p == '-' || (IsDigit(*p) && local)) |
| 663 |
return 0; |
| 664 |
|
| 665 |
for (; *p; ++p) |
| 666 |
if (!IsNickChar(*p)) |
| 667 |
return 0; |
| 668 |
|
| 669 |
return p - nickname <= NICKLEN; |
| 670 |
} |
| 671 |
|
| 672 |
/* send_umode() |
| 673 |
* send the MODE string for user (user) to connection client_p |
| 674 |
* -avalon |
| 675 |
* |
| 676 |
* inputs - client_p |
| 677 |
* - source_p |
| 678 |
* - int old |
| 679 |
* - suplied umode_buf |
| 680 |
* output - NONE |
| 681 |
*/ |
| 682 |
void |
| 683 |
send_umode(struct Client *client_p, struct Client *source_p, |
| 684 |
unsigned int old, char *umode_buf) |
| 685 |
{ |
| 686 |
char *m = umode_buf; |
| 687 |
int what = 0; |
| 688 |
|
| 689 |
/* |
| 690 |
* Build a string in umode_buf to represent the change in the user's |
| 691 |
* mode between the new (source_p->umodes) and 'old'. |
| 692 |
*/ |
| 693 |
for (const struct user_modes *tab = umode_tab; tab->c; ++tab) |
| 694 |
{ |
| 695 |
if ((tab->flag & old) && !HasUMode(source_p, tab->flag)) |
| 696 |
{ |
| 697 |
if (what == MODE_DEL) |
| 698 |
*m++ = tab->c; |
| 699 |
else |
| 700 |
{ |
| 701 |
what = MODE_DEL; |
| 702 |
*m++ = '-'; |
| 703 |
*m++ = tab->c; |
| 704 |
} |
| 705 |
} |
| 706 |
else if (!(tab->flag & old) && HasUMode(source_p, tab->flag)) |
| 707 |
{ |
| 708 |
if (what == MODE_ADD) |
| 709 |
*m++ = tab->c; |
| 710 |
else |
| 711 |
{ |
| 712 |
what = MODE_ADD; |
| 713 |
*m++ = '+'; |
| 714 |
*m++ = tab->c; |
| 715 |
} |
| 716 |
} |
| 717 |
} |
| 718 |
|
| 719 |
*m = '\0'; |
| 720 |
|
| 721 |
if (*umode_buf && client_p) |
| 722 |
sendto_one(client_p, ":%s!%s@%s MODE %s :%s", |
| 723 |
client_p->name, client_p->username, |
| 724 |
client_p->host, client_p->name, umode_buf); |
| 725 |
} |
| 726 |
|
| 727 |
/* send_umode_out() |
| 728 |
* |
| 729 |
* inputs - |
| 730 |
* output - NONE |
| 731 |
* side effects - Only send ubuf out to servers that know about this client |
| 732 |
*/ |
| 733 |
void |
| 734 |
send_umode_out(struct Client *source_p, unsigned int old) |
| 735 |
{ |
| 736 |
char buf[IRCD_BUFSIZE] = ""; |
| 737 |
|
| 738 |
send_umode(MyClient(source_p) ? source_p : NULL, source_p, old, buf); |
| 739 |
|
| 740 |
if (buf[0]) |
| 741 |
sendto_server(source_p, 0, 0, ":%s MODE %s :%s", |
| 742 |
source_p->id, source_p->id, buf); |
| 743 |
} |
| 744 |
|
| 745 |
void |
| 746 |
user_set_hostmask(struct Client *target_p, const char *hostname, const int what) |
| 747 |
{ |
| 748 |
dlink_node *node = NULL; |
| 749 |
|
| 750 |
if (!strcmp(target_p->host, hostname)) |
| 751 |
return; |
| 752 |
|
| 753 |
switch (what) |
| 754 |
{ |
| 755 |
case MODE_ADD: |
| 756 |
AddUMode(target_p, UMODE_HIDDENHOST); |
| 757 |
break; |
| 758 |
case MODE_DEL: |
| 759 |
DelUMode(target_p, UMODE_HIDDENHOST); |
| 760 |
break; |
| 761 |
default: return; |
| 762 |
} |
| 763 |
|
| 764 |
if (ConfigGeneral.cycle_on_host_change) |
| 765 |
sendto_common_channels_local(target_p, 0, 0, ":%s!%s@%s QUIT :Changing hostname", |
| 766 |
target_p->name, target_p->username, target_p->host); |
| 767 |
|
| 768 |
if (HasFlag(target_p, FLAGS_USERHOST)) |
| 769 |
userhost_del(target_p->username, target_p->host, !MyConnect(target_p)); |
| 770 |
|
| 771 |
strlcpy(target_p->host, hostname, sizeof(target_p->host)); |
| 772 |
|
| 773 |
userhost_add(target_p->username, target_p->host, !MyConnect(target_p)); |
| 774 |
AddFlag(target_p, FLAGS_USERHOST); |
| 775 |
|
| 776 |
if (MyClient(target_p)) |
| 777 |
{ |
| 778 |
sendto_one_numeric(target_p, &me, RPL_VISIBLEHOST, target_p->host); |
| 779 |
clear_ban_cache_client(target_p); |
| 780 |
} |
| 781 |
|
| 782 |
if (!ConfigGeneral.cycle_on_host_change) |
| 783 |
return; |
| 784 |
|
| 785 |
DLINK_FOREACH(node, target_p->channel.head) |
| 786 |
{ |
| 787 |
char modebuf[4], nickbuf[NICKLEN * 3 + 3] = ""; |
| 788 |
char *p = modebuf; |
| 789 |
int len = 0; |
| 790 |
const struct Membership *member = node->data; |
| 791 |
|
| 792 |
if (has_member_flags(member, CHFL_CHANOP)) |
| 793 |
{ |
| 794 |
*p++ = 'o'; |
| 795 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name); |
| 796 |
} |
| 797 |
|
| 798 |
if (has_member_flags(member, CHFL_HALFOP)) |
| 799 |
{ |
| 800 |
*p++ = 'h'; |
| 801 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name); |
| 802 |
} |
| 803 |
|
| 804 |
if (has_member_flags(member, CHFL_VOICE)) |
| 805 |
{ |
| 806 |
*p++ = 'v'; |
| 807 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name); |
| 808 |
} |
| 809 |
|
| 810 |
*p = '\0'; |
| 811 |
|
| 812 |
|
| 813 |
sendto_channel_local_butone(target_p, CAP_EXTENDED_JOIN, 0, member->chptr, ":%s!%s@%s JOIN %s %s :%s", |
| 814 |
target_p->name, target_p->username, |
| 815 |
target_p->host, member->chptr->name, |
| 816 |
(!IsDigit(target_p->account[0]) && target_p->account[0] != '*') ? target_p->account : "*", |
| 817 |
target_p->info); |
| 818 |
sendto_channel_local_butone(target_p, 0, CAP_EXTENDED_JOIN, member->chptr, ":%s!%s@%s JOIN :%s", |
| 819 |
target_p->name, target_p->username, |
| 820 |
target_p->host, member->chptr->name); |
| 821 |
|
| 822 |
if (nickbuf[0]) |
| 823 |
sendto_channel_local_butone(target_p, 0, 0, member->chptr, ":%s MODE %s +%s %s", |
| 824 |
target_p->servptr->name, member->chptr->name, |
| 825 |
modebuf, nickbuf); |
| 826 |
|
| 827 |
} |
| 828 |
|
| 829 |
if (target_p->away[0]) |
| 830 |
sendto_common_channels_local(target_p, 0, CAP_AWAY_NOTIFY, |
| 831 |
":%s!%s@%s AWAY :%s", |
| 832 |
target_p->name, target_p->username, |
| 833 |
target_p->host, target_p->away); |
| 834 |
} |