| 1 |
/* |
| 2 |
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
| 3 |
* |
| 4 |
* Copyright (c) 1997-2022 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 |
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*/ |
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|
| 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 "conf_gecos.h" |
| 42 |
#include "log.h" |
| 43 |
#include "server.h" |
| 44 |
#include "send.h" |
| 45 |
#include "memory.h" |
| 46 |
#include "packet.h" |
| 47 |
#include "rng_mt.h" |
| 48 |
#include "misc.h" |
| 49 |
#include "parse.h" |
| 50 |
#include "monitor.h" |
| 51 |
#include "isupport.h" |
| 52 |
#include "tls.h" |
| 53 |
#include "patchlevel.h" |
| 54 |
|
| 55 |
static char umode_buffer[UMODE_MAX_STR]; |
| 56 |
|
| 57 |
const struct user_modes *umode_map[256]; |
| 58 |
const struct user_modes umode_tab[] = |
| 59 |
{ |
| 60 |
{ 'B', UMODE_BOT }, |
| 61 |
{ 'D', UMODE_DEAF }, |
| 62 |
{ 'F', UMODE_FARCONNECT }, |
| 63 |
{ 'G', UMODE_SOFTCALLERID }, |
| 64 |
{ 'H', UMODE_HIDDEN }, |
| 65 |
{ 'X', UMODE_EXPIRATION }, |
| 66 |
{ 'R', UMODE_REGONLY }, |
| 67 |
{ 'S', UMODE_SECURE }, |
| 68 |
{ 'W', UMODE_WEBIRC }, |
| 69 |
{ 'a', UMODE_ADMIN }, |
| 70 |
{ 'c', UMODE_CCONN }, |
| 71 |
{ 'd', UMODE_DEBUG }, |
| 72 |
{ 'e', UMODE_EXTERNAL }, |
| 73 |
{ 'f', UMODE_FLOOD }, |
| 74 |
{ 'g', UMODE_CALLERID }, |
| 75 |
{ 'i', UMODE_INVISIBLE }, |
| 76 |
{ 'j', UMODE_REJ }, |
| 77 |
{ 'k', UMODE_SKILL }, |
| 78 |
{ 'l', UMODE_LOCOPS }, |
| 79 |
{ 'n', UMODE_NCHANGE }, |
| 80 |
{ 'o', UMODE_OPER }, |
| 81 |
{ 'p', UMODE_HIDECHANS }, |
| 82 |
{ 'q', UMODE_HIDEIDLE }, |
| 83 |
{ 'r', UMODE_REGISTERED }, |
| 84 |
{ 's', UMODE_SERVNOTICE }, |
| 85 |
{ 'w', UMODE_WALLOP }, |
| 86 |
{ 'y', UMODE_SPY }, |
| 87 |
{ '\0', 0 } |
| 88 |
}; |
| 89 |
|
| 90 |
void |
| 91 |
user_modes_init(void) |
| 92 |
{ |
| 93 |
char *umode_buffer_ptr = umode_buffer; |
| 94 |
|
| 95 |
for (const struct user_modes *tab = umode_tab; tab->c; ++tab) |
| 96 |
{ |
| 97 |
umode_map[tab->c] = tab; |
| 98 |
*umode_buffer_ptr++ = tab->c; |
| 99 |
} |
| 100 |
|
| 101 |
*umode_buffer_ptr = '\0'; |
| 102 |
} |
| 103 |
|
| 104 |
/* show_lusers() |
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* |
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* inputs - pointer to client |
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* output - NONE |
| 108 |
* side effects - display to client user counts etc. |
| 109 |
*/ |
| 110 |
void |
| 111 |
show_lusers(struct Client *client) |
| 112 |
{ |
| 113 |
if (ConfigServerHide.hide_servers == 0 || HasUMode(client, UMODE_OPER)) |
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sendto_one_numeric(client, &me, RPL_LUSERCLIENT, (dlink_list_length(&global_client_list) - Count.invisi), |
| 115 |
Count.invisi, dlink_list_length(&global_server_list)); |
| 116 |
else |
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sendto_one_numeric(client, &me, RPL_LUSERCLIENT, (dlink_list_length(&global_client_list) - Count.invisi), |
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Count.invisi, 1); |
| 119 |
|
| 120 |
if (Count.oper) |
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sendto_one_numeric(client, &me, RPL_LUSEROP, Count.oper); |
| 122 |
|
| 123 |
if (dlink_list_length(&unknown_list)) |
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sendto_one_numeric(client, &me, RPL_LUSERUNKNOWN, dlink_list_length(&unknown_list)); |
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|
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if (dlink_list_length(channel_get_list())) |
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sendto_one_numeric(client, &me, RPL_LUSERCHANNELS, dlink_list_length(channel_get_list())); |
| 128 |
|
| 129 |
if (ConfigServerHide.hide_servers == 0 || HasUMode(client, UMODE_OPER)) |
| 130 |
{ |
| 131 |
sendto_one_numeric(client, &me, RPL_LUSERME, dlink_list_length(&local_client_list), dlink_list_length(&local_server_list)); |
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sendto_one_numeric(client, &me, RPL_LOCALUSERS, dlink_list_length(&local_client_list), Count.max_loc); |
| 133 |
sendto_one_numeric(client, &me, RPL_GLOBALUSERS, dlink_list_length(&global_client_list), Count.max_tot); |
| 134 |
sendto_one_numeric(client, &me, RPL_STATSCONN, Count.max_loc_con, Count.max_loc, Count.totalrestartcount); |
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} |
| 136 |
else |
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{ |
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sendto_one_numeric(client, &me, RPL_LUSERME, dlink_list_length(&global_client_list), 0); |
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sendto_one_numeric(client, &me, RPL_LOCALUSERS, dlink_list_length(&global_client_list), Count.max_tot); |
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sendto_one_numeric(client, &me, RPL_GLOBALUSERS, dlink_list_length(&global_client_list), Count.max_tot); |
| 141 |
} |
| 142 |
} |
| 143 |
|
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/* report_and_set_user_flags() |
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* |
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* inputs - pointer to client |
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* - pointer to conf for this user |
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* output - NONE |
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* side effects - Report to user any special flags |
| 150 |
* they are getting, and set them. |
| 151 |
*/ |
| 152 |
static void |
| 153 |
report_and_set_user_flags(struct Client *client, const struct MaskItem *conf) |
| 154 |
{ |
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/* If this user is being spoofed, tell them so */ |
| 156 |
if (IsConfDoSpoofIp(conf)) |
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sendto_one_notice(client, &me, ":*** Spoofing your IP"); |
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|
| 159 |
/* If this user is in the exception class, set it "E lined" */ |
| 160 |
if (IsConfExemptKline(conf)) |
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{ |
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AddFlag(client, FLAGS_EXEMPTKLINE); |
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sendto_one_notice(client, &me, ":*** You are exempt from K/D lines"); |
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} |
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|
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if (IsConfExemptXline(conf)) |
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{ |
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AddFlag(client, FLAGS_EXEMPTXLINE); |
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sendto_one_notice(client, &me, ":*** You are exempt from X lines"); |
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} |
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|
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if (IsConfExemptResv(conf)) |
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{ |
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AddFlag(client, FLAGS_EXEMPTRESV); |
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sendto_one_notice(client, &me, ":*** You are exempt from resvs"); |
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} |
| 177 |
|
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/* If this user is exempt from user limits set it "F lined" */ |
| 179 |
if (IsConfExemptLimits(conf)) |
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{ |
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AddFlag(client, FLAGS_NOLIMIT); |
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sendto_one_notice(client, &me, ":*** You are exempt from user limits"); |
| 183 |
} |
| 184 |
|
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if (IsConfCanFlood(conf)) |
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{ |
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AddFlag(client, FLAGS_CANFLOOD); |
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sendto_one_notice(client, &me, ":*** You are exempt from flood protection"); |
| 189 |
} |
| 190 |
} |
| 191 |
|
| 192 |
/* introduce_client() |
| 193 |
* |
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* inputs - client |
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* output - NONE |
| 196 |
* side effects - This common function introduces a client to the rest |
| 197 |
* of the net, either from a local client connect or |
| 198 |
* from a remote connect. |
| 199 |
*/ |
| 200 |
static void |
| 201 |
introduce_client(struct Client *client) |
| 202 |
{ |
| 203 |
char buf[UMODE_MAX_STR] = ""; |
| 204 |
|
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send_umode(client, MyConnect(client), 0, buf); |
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monitor_signon(client); |
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|
| 208 |
if (buf[0] == '\0') |
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{ |
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buf[0] = '+'; |
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buf[1] = '\0'; |
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} |
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|
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sendto_server(client, 0, 0, ":%s UID %s %u %ju %s %s %s %s %s %s %s :%s", |
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client->servptr->id, client->name, client->hopcount + 1, |
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client->tsinfo, buf, client->username, client->host, |
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client->realhost, client->sockhost, client->id, |
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client->account, client->info); |
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|
| 220 |
if (!EmptyString(client->tls_certfp)) |
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sendto_server(client, 0, 0, ":%s CERTFP %s", client->id, client->tls_certfp); |
| 222 |
} |
| 223 |
|
| 224 |
/* user_welcome() |
| 225 |
* |
| 226 |
* inputs - client pointer to client to welcome |
| 227 |
* output - NONE |
| 228 |
* side effects - |
| 229 |
*/ |
| 230 |
static void |
| 231 |
user_welcome(struct Client *client) |
| 232 |
{ |
| 233 |
static const char built_date[] = __DATE__ " at " __TIME__; |
| 234 |
|
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if (HasFlag(client, FLAGS_TLS)) |
| 236 |
{ |
| 237 |
AddUMode(client, UMODE_SECURE); |
| 238 |
|
| 239 |
client->tls_cipher = xstrdup(tls_get_cipher(&client->connection->fd->tls)); |
| 240 |
sendto_one_notice(client, &me, ":*** Connected securely via %s", |
| 241 |
client->tls_cipher); |
| 242 |
} |
| 243 |
|
| 244 |
sendto_one_numeric(client, &me, RPL_WELCOME, ConfigServerInfo.network_name, |
| 245 |
client->name, client->username, client->realhost); |
| 246 |
sendto_one_numeric(client, &me, RPL_YOURHOST, |
| 247 |
listener_get_name(client->connection->listener), PATCHLEVEL); |
| 248 |
sendto_one_numeric(client, &me, RPL_CREATED, built_date); |
| 249 |
sendto_one_numeric(client, &me, RPL_MYINFO, me.name, PATCHLEVEL, umode_buffer, |
| 250 |
cmode_rpl04[0], cmode_rpl04[1]); |
| 251 |
|
| 252 |
isupport_show(client); |
| 253 |
show_lusers(client); |
| 254 |
motd_signon(client); |
| 255 |
} |
| 256 |
|
| 257 |
/*! \brief This function is called when both NICK and USER messages |
| 258 |
* have been accepted for the client, in whatever order. Only |
| 259 |
* after this, is the UID message propagated. |
| 260 |
* \param client Pointer to given client to introduce |
| 261 |
*/ |
| 262 |
void |
| 263 |
register_local_user(struct Client *client) |
| 264 |
{ |
| 265 |
const struct MaskItem *conf = NULL; |
| 266 |
|
| 267 |
assert(client == client->from); |
| 268 |
assert(client->connection->registration == 0); |
| 269 |
assert(MyConnect(client)); |
| 270 |
assert(IsUnknown(client)); |
| 271 |
|
| 272 |
if (ConfigGeneral.ping_cookie) |
| 273 |
{ |
| 274 |
if (!HasFlag(client, FLAGS_PINGSENT) && client->connection->random_ping == 0) |
| 275 |
{ |
| 276 |
do |
| 277 |
client->connection->random_ping = genrand_int32(); |
| 278 |
while (client->connection->random_ping == 0); |
| 279 |
|
| 280 |
sendto_one(client, "PING :%u", client->connection->random_ping); |
| 281 |
AddFlag(client, FLAGS_PINGSENT); |
| 282 |
return; |
| 283 |
} |
| 284 |
|
| 285 |
if (!HasFlag(client, FLAGS_PING_COOKIE)) |
| 286 |
return; |
| 287 |
} |
| 288 |
|
| 289 |
if (conf_check_client(client) == false) |
| 290 |
return; |
| 291 |
|
| 292 |
conf = client->connection->confs.head->data; |
| 293 |
|
| 294 |
if (!HasFlag(client, FLAGS_GOTID)) |
| 295 |
{ |
| 296 |
if (IsNeedIdentd(conf)) |
| 297 |
{ |
| 298 |
++ServerStats.is_ref; |
| 299 |
sendto_one_notice(client, &me, ":*** Notice -- You need to install " |
| 300 |
"identd to use this server"); |
| 301 |
exit_client(client, "Install identd"); |
| 302 |
return; |
| 303 |
} |
| 304 |
} |
| 305 |
|
| 306 |
if (valid_username(client->username, true) == false) |
| 307 |
{ |
| 308 |
char buf[sizeof("Invalid username []") + sizeof(client->username)]; |
| 309 |
|
| 310 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
| 311 |
"Invalid username: %s (%s@%s)", |
| 312 |
client->name, client->username, client->host); |
| 313 |
++ServerStats.is_ref; |
| 314 |
snprintf(buf, sizeof(buf), "Invalid username [%s]", client->username); |
| 315 |
exit_client(client, buf); |
| 316 |
return; |
| 317 |
} |
| 318 |
|
| 319 |
/* Password check */ |
| 320 |
if (!EmptyString(conf->passwd)) |
| 321 |
{ |
| 322 |
if (match_conf_password(client->connection->password, conf) == false) |
| 323 |
{ |
| 324 |
++ServerStats.is_ref; |
| 325 |
|
| 326 |
sendto_one_numeric(client, &me, ERR_PASSWDMISMATCH); |
| 327 |
exit_client(client, "Bad Password"); |
| 328 |
return; |
| 329 |
} |
| 330 |
} |
| 331 |
|
| 332 |
xfree(client->connection->password); |
| 333 |
client->connection->password = NULL; |
| 334 |
|
| 335 |
/* |
| 336 |
* Report if user has &^>= etc. and set flags as needed in client |
| 337 |
*/ |
| 338 |
report_and_set_user_flags(client, conf); |
| 339 |
|
| 340 |
/* |
| 341 |
* Limit clients - |
| 342 |
* We want to be able to have servers and F-line clients |
| 343 |
* connect, so save room for "buffer" connections. |
| 344 |
* Smaller servers may want to decrease this, and it should |
| 345 |
* probably be just a percentage of the MAXCLIENTS... |
| 346 |
* -Taner |
| 347 |
*/ |
| 348 |
if ((dlink_list_length(&local_client_list) >= GlobalSetOptions.maxclients + MAX_BUFFER) || |
| 349 |
(dlink_list_length(&local_client_list) >= GlobalSetOptions.maxclients && !HasFlag(client, FLAGS_NOLIMIT))) |
| 350 |
{ |
| 351 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
| 352 |
"Too many clients, rejecting %s[%s].", |
| 353 |
client->name, client->host); |
| 354 |
++ServerStats.is_ref; |
| 355 |
exit_client(client, "Sorry, server is full - try later"); |
| 356 |
return; |
| 357 |
} |
| 358 |
|
| 359 |
if (!HasFlag(client, FLAGS_EXEMPTXLINE)) |
| 360 |
{ |
| 361 |
const struct GecosItem *gecos = gecos_find(client->info, match); |
| 362 |
if (gecos) |
| 363 |
{ |
| 364 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
| 365 |
"X-line Rejecting [%s] [%s], user %s [%s]", |
| 366 |
client->info, gecos->reason, |
| 367 |
client_get_name(client, HIDE_IP), |
| 368 |
client->sockhost); |
| 369 |
++ServerStats.is_ref; |
| 370 |
exit_client(client, "Bad user info"); |
| 371 |
return; |
| 372 |
} |
| 373 |
} |
| 374 |
|
| 375 |
const char *id; |
| 376 |
while (hash_find_id((id = uid_get()))) |
| 377 |
; |
| 378 |
|
| 379 |
strlcpy(client->id, id, sizeof(client->id)); |
| 380 |
hash_add_id(client); |
| 381 |
|
| 382 |
sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE, |
| 383 |
"Client connecting: %s (%s@%s) [%s] {%s} [%s] <%s>", |
| 384 |
client->name, client->username, client->realhost, |
| 385 |
client->sockhost, |
| 386 |
get_client_class(&client->connection->confs), |
| 387 |
client->info, client->id); |
| 388 |
|
| 389 |
if (ConfigGeneral.invisible_on_connect) |
| 390 |
{ |
| 391 |
AddUMode(client, UMODE_INVISIBLE); |
| 392 |
++Count.invisi; |
| 393 |
} |
| 394 |
|
| 395 |
SetClient(client); |
| 396 |
|
| 397 |
client->servptr = &me; |
| 398 |
client->connection->last_privmsg = event_base->time.sec_monotonic; |
| 399 |
|
| 400 |
dlinkAdd(client, &client->lnode, &client->servptr->serv->client_list); |
| 401 |
dlinkAdd(client, &client->node, &global_client_list); |
| 402 |
|
| 403 |
assert(dlinkFind(&unknown_list, client)); |
| 404 |
|
| 405 |
dlink_move_node(&client->connection->lclient_node, |
| 406 |
&unknown_list, &local_client_list); |
| 407 |
|
| 408 |
if (dlink_list_length(&local_client_list) > Count.max_loc) |
| 409 |
{ |
| 410 |
Count.max_loc = dlink_list_length(&local_client_list); |
| 411 |
|
| 412 |
if (!(Count.max_loc % 10)) |
| 413 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
| 414 |
"New maximum local client connections: %u", |
| 415 |
Count.max_loc); |
| 416 |
} |
| 417 |
|
| 418 |
if ((dlink_list_length(&local_client_list) + |
| 419 |
dlink_list_length(&local_server_list)) > Count.max_loc_con) |
| 420 |
Count.max_loc_con = dlink_list_length(&local_client_list) + |
| 421 |
dlink_list_length(&local_server_list); |
| 422 |
|
| 423 |
if (dlink_list_length(&global_client_list) > Count.max_tot) |
| 424 |
Count.max_tot = dlink_list_length(&global_client_list); |
| 425 |
++Count.totalrestartcount; |
| 426 |
|
| 427 |
user_welcome(client); |
| 428 |
|
| 429 |
introduce_client(client); |
| 430 |
} |
| 431 |
|
| 432 |
/* register_remote_user() |
| 433 |
* |
| 434 |
* inputs - client remote or directly connected client |
| 435 |
* - username to register as |
| 436 |
* - host name to register as |
| 437 |
* - server name |
| 438 |
* output - NONE |
| 439 |
* side effects - This function is called when a remote client |
| 440 |
* is introduced by a server. |
| 441 |
*/ |
| 442 |
void |
| 443 |
register_remote_user(struct Client *client) |
| 444 |
{ |
| 445 |
assert(client->servptr->from == client->from); |
| 446 |
|
| 447 |
/* |
| 448 |
* If the nick has been introduced by a services server, |
| 449 |
* make it a service as well. |
| 450 |
*/ |
| 451 |
if (HasFlag(client->servptr, FLAGS_SERVICE)) |
| 452 |
AddFlag(client, FLAGS_SERVICE); |
| 453 |
|
| 454 |
SetClient(client); |
| 455 |
dlinkAdd(client, &client->lnode, &client->servptr->serv->client_list); |
| 456 |
dlinkAdd(client, &client->node, &global_client_list); |
| 457 |
|
| 458 |
if (dlink_list_length(&global_client_list) > Count.max_tot) |
| 459 |
Count.max_tot = dlink_list_length(&global_client_list); |
| 460 |
|
| 461 |
if (HasFlag(client->servptr, FLAGS_EOB)) |
| 462 |
sendto_realops_flags(UMODE_FARCONNECT, L_ALL, SEND_NOTICE, |
| 463 |
"Client connecting at %s: %s (%s@%s) [%s] [%s] <%s>", |
| 464 |
client->servptr->name, |
| 465 |
client->name, client->username, client->realhost, |
| 466 |
client->sockhost, client->info, client->id); |
| 467 |
|
| 468 |
introduce_client(client); |
| 469 |
} |
| 470 |
|
| 471 |
/* valid_hostname() |
| 472 |
* |
| 473 |
* Inputs - pointer to hostname |
| 474 |
* Output - 1 if valid, 0 if not |
| 475 |
* Side effects - check hostname for validity |
| 476 |
* |
| 477 |
* NOTE: this doesn't allow a hostname to begin with a dot and |
| 478 |
* will not allow more dots than chars. |
| 479 |
*/ |
| 480 |
bool |
| 481 |
valid_hostname(const char *hostname) |
| 482 |
{ |
| 483 |
const char *p = hostname; |
| 484 |
|
| 485 |
assert(p); |
| 486 |
|
| 487 |
if (EmptyString(p) || *p == '.' || *p == ':') |
| 488 |
return false; |
| 489 |
|
| 490 |
for (; *p; ++p) |
| 491 |
if (!IsHostChar(*p)) |
| 492 |
return false; |
| 493 |
|
| 494 |
return p - hostname <= HOSTLEN; |
| 495 |
} |
| 496 |
|
| 497 |
/* valid_username() |
| 498 |
* |
| 499 |
* Inputs - pointer to user |
| 500 |
* Output - 1 if valid, 0 if not |
| 501 |
* Side effects - check username for validity |
| 502 |
* |
| 503 |
* Absolutely always reject any '*' '!' '?' '@' in an user name |
| 504 |
* reject any odd control characters names. |
| 505 |
* Allow '.' in username to allow for "first.last" |
| 506 |
* style of username |
| 507 |
*/ |
| 508 |
bool |
| 509 |
valid_username(const char *username, bool local) |
| 510 |
{ |
| 511 |
const char *p = username; |
| 512 |
|
| 513 |
assert(p); |
| 514 |
|
| 515 |
if (*p == '~') |
| 516 |
++p; |
| 517 |
|
| 518 |
/* |
| 519 |
* Reject usernames that don't start with an alphanum |
| 520 |
* i.e. reject jokers who have '-@somehost' or '.@somehost' |
| 521 |
* or "-hi-@somehost", "h-----@somehost" would still be accepted. |
| 522 |
*/ |
| 523 |
if (!IsAlNum(*p)) |
| 524 |
return false; |
| 525 |
|
| 526 |
if (local) |
| 527 |
{ |
| 528 |
unsigned int special = 0; |
| 529 |
|
| 530 |
while (*p) |
| 531 |
{ |
| 532 |
if (*p == '-' || *p == '_' || *p == '.') |
| 533 |
{ |
| 534 |
if (ConfigGeneral.specials_in_ident < ++special) |
| 535 |
return false; |
| 536 |
} |
| 537 |
else if (!IsUser2Char(*p)) |
| 538 |
return false; |
| 539 |
|
| 540 |
++p; |
| 541 |
} |
| 542 |
} |
| 543 |
else |
| 544 |
{ |
| 545 |
while (*++p) |
| 546 |
if (!IsUserChar(*p)) |
| 547 |
return false; |
| 548 |
} |
| 549 |
|
| 550 |
return p - username <= USERLEN; |
| 551 |
} |
| 552 |
|
| 553 |
/* clean_nick_name() |
| 554 |
* |
| 555 |
* input - nickname |
| 556 |
* - whether it's a local nick (1) or remote (0) |
| 557 |
* output - none |
| 558 |
* side effects - walks through the nickname, returning 0 if erroneous |
| 559 |
*/ |
| 560 |
bool |
| 561 |
valid_nickname(const char *nickname, bool local) |
| 562 |
{ |
| 563 |
const char *p = nickname; |
| 564 |
|
| 565 |
assert(p); |
| 566 |
|
| 567 |
/* |
| 568 |
* Nicks can't start with a digit or - or be 0 length. |
| 569 |
*/ |
| 570 |
if (EmptyString(p) || *p == '-' || (IsDigit(*p) && local)) |
| 571 |
return false; |
| 572 |
|
| 573 |
for (; *p; ++p) |
| 574 |
if (!IsNickChar(*p)) |
| 575 |
return false; |
| 576 |
|
| 577 |
return p - nickname <= NICKLEN; |
| 578 |
} |
| 579 |
|
| 580 |
/*! \brief Builds a mode change string to buffer pointed by \a buf |
| 581 |
* \param client Pointer to client |
| 582 |
* \param dispatch Whether to send a MODE message to client |
| 583 |
* \param old Old user mode to compare against when building new mode buffer |
| 584 |
* \param buf Pointer to buffer to build string in |
| 585 |
*/ |
| 586 |
void |
| 587 |
send_umode(struct Client *client, bool dispatch, unsigned int old, char *buf) |
| 588 |
{ |
| 589 |
char *m = buf; |
| 590 |
int what = 0; |
| 591 |
|
| 592 |
/* |
| 593 |
* Build a string in umode_buf to represent the change in the user's |
| 594 |
* mode between the new (client->umodes) and 'old'. |
| 595 |
*/ |
| 596 |
for (const struct user_modes *tab = umode_tab; tab->c; ++tab) |
| 597 |
{ |
| 598 |
if ((tab->flag & old) && !HasUMode(client, tab->flag)) |
| 599 |
{ |
| 600 |
if (what == MODE_DEL) |
| 601 |
*m++ = tab->c; |
| 602 |
else |
| 603 |
{ |
| 604 |
what = MODE_DEL; |
| 605 |
*m++ = '-'; |
| 606 |
*m++ = tab->c; |
| 607 |
} |
| 608 |
} |
| 609 |
else if (!(tab->flag & old) && HasUMode(client, tab->flag)) |
| 610 |
{ |
| 611 |
if (what == MODE_ADD) |
| 612 |
*m++ = tab->c; |
| 613 |
else |
| 614 |
{ |
| 615 |
what = MODE_ADD; |
| 616 |
*m++ = '+'; |
| 617 |
*m++ = tab->c; |
| 618 |
} |
| 619 |
} |
| 620 |
} |
| 621 |
|
| 622 |
*m = '\0'; |
| 623 |
|
| 624 |
if (dispatch == true && *buf) |
| 625 |
sendto_one(client, ":%s!%s@%s MODE %s :%s", |
| 626 |
client->name, client->username, |
| 627 |
client->host, client->name, buf); |
| 628 |
} |
| 629 |
|
| 630 |
/* send_umode_out() |
| 631 |
* |
| 632 |
* inputs - |
| 633 |
* output - NONE |
| 634 |
* side effects - Only send ubuf out to servers that know about this client |
| 635 |
*/ |
| 636 |
void |
| 637 |
send_umode_out(struct Client *client, unsigned int old) |
| 638 |
{ |
| 639 |
char buf[UMODE_MAX_STR] = ""; |
| 640 |
|
| 641 |
send_umode(client, MyConnect(client), old, buf); |
| 642 |
|
| 643 |
if (buf[0]) |
| 644 |
sendto_server(client, 0, 0, ":%s MODE %s :%s", |
| 645 |
client->id, client->id, buf); |
| 646 |
} |
| 647 |
|
| 648 |
void |
| 649 |
user_set_hostmask(struct Client *client, const char *hostname) |
| 650 |
{ |
| 651 |
dlink_node *node; |
| 652 |
|
| 653 |
if (strcmp(client->host, hostname) == 0) |
| 654 |
return; |
| 655 |
|
| 656 |
if (ConfigGeneral.cycle_on_host_change) |
| 657 |
sendto_common_channels_local(client, false, 0, CAP_CHGHOST, ":%s!%s@%s QUIT :Changing hostname", |
| 658 |
client->name, client->username, client->host); |
| 659 |
|
| 660 |
sendto_common_channels_local(client, true, CAP_CHGHOST, 0, ":%s!%s@%s CHGHOST %s %s", |
| 661 |
client->name, client->username, |
| 662 |
client->host, client->username, hostname); |
| 663 |
|
| 664 |
strlcpy(client->host, hostname, sizeof(client->host)); |
| 665 |
|
| 666 |
if (MyConnect(client)) |
| 667 |
{ |
| 668 |
sendto_one_numeric(client, &me, RPL_VISIBLEHOST, client->host); |
| 669 |
clear_ban_cache_list(&client->channel); |
| 670 |
} |
| 671 |
|
| 672 |
if (ConfigGeneral.cycle_on_host_change == 0) |
| 673 |
return; |
| 674 |
|
| 675 |
DLINK_FOREACH(node, client->channel.head) |
| 676 |
{ |
| 677 |
char modebuf[CMEMBER_STATUS_FLAGS_LEN + 1]; |
| 678 |
char nickbuf[CMEMBER_STATUS_FLAGS_LEN * NICKLEN + CMEMBER_STATUS_FLAGS_LEN] = ""; |
| 679 |
char *p = modebuf; |
| 680 |
int len = 0; |
| 681 |
const struct ChannelMember *member = node->data; |
| 682 |
|
| 683 |
if (member_has_flags(member, CHFL_CHANOP) == true) |
| 684 |
{ |
| 685 |
*p++ = 'o'; |
| 686 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", client->name); |
| 687 |
} |
| 688 |
|
| 689 |
if (member_has_flags(member, CHFL_HALFOP) == true) |
| 690 |
{ |
| 691 |
*p++ = 'h'; |
| 692 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", client->name); |
| 693 |
} |
| 694 |
|
| 695 |
if (member_has_flags(member, CHFL_VOICE) == true) |
| 696 |
{ |
| 697 |
*p++ = 'v'; |
| 698 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", client->name); |
| 699 |
} |
| 700 |
|
| 701 |
*p = '\0'; |
| 702 |
|
| 703 |
sendto_channel_local(client, member->channel, 0, CAP_EXTENDED_JOIN, CAP_CHGHOST, ":%s!%s@%s JOIN %s %s :%s", |
| 704 |
client->name, client->username, |
| 705 |
client->host, member->channel->name, |
| 706 |
client->account, client->info); |
| 707 |
sendto_channel_local(client, member->channel, 0, 0, CAP_EXTENDED_JOIN | CAP_CHGHOST, ":%s!%s@%s JOIN :%s", |
| 708 |
client->name, client->username, |
| 709 |
client->host, member->channel->name); |
| 710 |
|
| 711 |
if (nickbuf[0]) |
| 712 |
sendto_channel_local(client, member->channel, 0, 0, CAP_CHGHOST, ":%s MODE %s +%s %s", |
| 713 |
client->servptr->name, member->channel->name, |
| 714 |
modebuf, nickbuf); |
| 715 |
} |
| 716 |
|
| 717 |
if (client->away[0]) |
| 718 |
sendto_common_channels_local(client, false, CAP_AWAY_NOTIFY, CAP_CHGHOST, |
| 719 |
":%s!%s@%s AWAY :%s", |
| 720 |
client->name, client->username, |
| 721 |
client->host, client->away); |
| 722 |
} |
