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/* |
2 |
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
3 |
* |
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* Copyright (c) 1997-2015 ircd-hybrid development team |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
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* USA |
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*/ |
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|
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/*! \file s_user.c |
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* \brief User related functions. |
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* \version $Id$ |
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*/ |
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|
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#include "stdinc.h" |
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#include "list.h" |
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#include "user.h" |
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#include "channel.h" |
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#include "channel_mode.h" |
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#include "client.h" |
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#include "hash.h" |
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#include "irc_string.h" |
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#include "ircd.h" |
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#include "listener.h" |
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#include "motd.h" |
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#include "numeric.h" |
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#include "conf.h" |
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#include "log.h" |
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#include "server.h" |
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#include "send.h" |
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#include "memory.h" |
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#include "packet.h" |
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#include "rng_mt.h" |
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#include "userhost.h" |
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#include "misc.h" |
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#include "parse.h" |
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#include "watch.h" |
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|
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static char umode_buffer[IRCD_BUFSIZE]; |
52 |
static const char *uid_get(void); |
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|
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/* Used for building up the isupport string, |
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* used with init_isupport, add_isupport, delete_isupport |
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*/ |
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struct Isupport |
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{ |
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dlink_node node; |
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char *name; |
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char *options; |
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int number; |
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}; |
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|
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static dlink_list support_list; |
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static dlink_list support_list_lines; |
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|
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const struct user_modes *umode_map[256]; |
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const struct user_modes umode_tab[] = |
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{ |
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{ 'D', UMODE_DEAF }, |
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{ 'F', UMODE_FARCONNECT }, |
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{ 'G', UMODE_SOFTCALLERID }, |
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{ 'H', UMODE_HIDDEN }, |
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{ 'R', UMODE_REGONLY }, |
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{ 'S', UMODE_SSL }, |
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{ 'W', UMODE_WEBIRC }, |
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{ 'a', UMODE_ADMIN }, |
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{ 'b', UMODE_BOTS }, |
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{ 'c', UMODE_CCONN }, |
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{ 'd', UMODE_DEBUG }, |
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{ 'e', UMODE_EXTERNAL }, |
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{ 'f', UMODE_FULL }, |
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{ 'g', UMODE_CALLERID }, |
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{ 'i', UMODE_INVISIBLE }, |
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{ 'j', UMODE_REJ }, |
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{ 'k', UMODE_SKILL }, |
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{ 'l', UMODE_LOCOPS }, |
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{ 'n', UMODE_NCHANGE }, |
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{ 'o', UMODE_OPER }, |
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{ 'p', UMODE_HIDECHANS }, |
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{ 'q', UMODE_HIDEIDLE }, |
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{ 'r', UMODE_REGISTERED }, |
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{ 's', UMODE_SERVNOTICE }, |
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{ 'u', UMODE_UNAUTH }, |
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{ 'w', UMODE_WALLOP }, |
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{ 'x', UMODE_HIDDENHOST }, |
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{ 'y', UMODE_SPY }, |
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{ '\0', 0 } |
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}; |
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|
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void |
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user_usermodes_init(void) |
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{ |
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char *umode_buffer_ptr = umode_buffer; |
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|
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for (const struct user_modes *tab = umode_tab; tab->c; ++tab) |
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{ |
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umode_map[tab->c] = tab; |
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*umode_buffer_ptr++ = tab->c; |
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} |
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|
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*umode_buffer_ptr = '\0'; |
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} |
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|
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/* show_lusers() |
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* |
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* inputs - pointer to client |
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* output - NONE |
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* side effects - display to client user counts etc. |
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*/ |
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void |
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show_lusers(struct Client *source_p) |
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{ |
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if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER)) |
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sendto_one_numeric(source_p, &me, RPL_LUSERCLIENT, (Count.total - Count.invisi), |
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Count.invisi, dlink_list_length(&global_server_list)); |
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else |
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sendto_one_numeric(source_p, &me, RPL_LUSERCLIENT, (Count.total - Count.invisi), |
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Count.invisi, 1); |
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|
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if (Count.oper) |
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sendto_one_numeric(source_p, &me, RPL_LUSEROP, Count.oper); |
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|
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if (dlink_list_length(&unknown_list)) |
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sendto_one_numeric(source_p, &me, RPL_LUSERUNKNOWN, dlink_list_length(&unknown_list)); |
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|
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if (dlink_list_length(&channel_list)) |
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sendto_one_numeric(source_p, &me, RPL_LUSERCHANNELS, dlink_list_length(&channel_list)); |
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|
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if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER)) |
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{ |
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sendto_one_numeric(source_p, &me, RPL_LUSERME, Count.local, Count.myserver); |
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sendto_one_numeric(source_p, &me, RPL_LOCALUSERS, Count.local, Count.max_loc); |
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} |
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else |
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{ |
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sendto_one_numeric(source_p, &me, RPL_LUSERME, Count.total, 0); |
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sendto_one_numeric(source_p, &me, RPL_LOCALUSERS, Count.total, Count.max_tot); |
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} |
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|
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sendto_one_numeric(source_p, &me, RPL_GLOBALUSERS, Count.total, Count.max_tot); |
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|
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if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER)) |
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sendto_one_numeric(source_p, &me, RPL_STATSCONN, Count.max_loc_con, |
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Count.max_loc_cli, Count.totalrestartcount); |
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|
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if (Count.local > Count.max_loc_cli) |
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Count.max_loc_cli = Count.local; |
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|
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if ((Count.local + Count.myserver) > Count.max_loc_con) |
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Count.max_loc_con = Count.local + Count.myserver; |
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} |
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|
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/* show_isupport() |
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* |
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* inputs - pointer to client |
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* output - NONE |
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* side effects - display to client what we support (for them) |
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*/ |
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void |
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show_isupport(struct Client *source_p) |
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{ |
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const dlink_node *node = NULL; |
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|
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DLINK_FOREACH(node, support_list_lines.head) |
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sendto_one_numeric(source_p, &me, RPL_ISUPPORT, node->data); |
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} |
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|
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|
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/* report_and_set_user_flags() |
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* |
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* inputs - pointer to source_p |
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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 |
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* they are getting, and set them. |
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*/ |
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static void |
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report_and_set_user_flags(struct Client *source_p, const struct MaskItem *conf) |
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{ |
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/* If this user is being spoofed, tell them so */ |
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if (IsConfDoSpoofIp(conf)) |
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sendto_one_notice(source_p, &me, ":*** Spoofing your IP. Congrats."); |
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|
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/* If this user is in the exception class, set it "E lined" */ |
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if (IsConfExemptKline(conf)) |
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{ |
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SetExemptKline(source_p); |
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sendto_one_notice(source_p, &me, ":*** You are exempt from K/D/G lines. Congrats."); |
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} |
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|
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/* |
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* The else here is to make sure that G line exempt users |
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* do not get noticed twice. |
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*/ |
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else if (IsConfExemptGline(conf)) |
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{ |
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SetExemptGline(source_p); |
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sendto_one_notice(source_p, &me, ":*** You are exempt from G lines. Congrats."); |
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} |
212 |
|
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if (IsConfExemptResv(conf)) |
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{ |
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SetExemptResv(source_p); |
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sendto_one_notice(source_p, &me, ":*** You are exempt from resvs. Congrats."); |
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} |
218 |
|
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/* If this user is exempt from user limits set it "F lined" */ |
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if (IsConfExemptLimits(conf)) |
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{ |
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SetExemptLimits(source_p); |
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sendto_one_notice(source_p, &me, ":*** You are exempt from user limits. Congrats."); |
224 |
} |
225 |
|
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if (IsConfCanFlood(conf)) |
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{ |
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SetCanFlood(source_p); |
229 |
sendto_one_notice(source_p, &me, ":*** You are exempt from flood " |
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"protection, aren't you fearsome."); |
231 |
} |
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} |
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|
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/* introduce_client() |
235 |
* |
236 |
* inputs - source_p |
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* output - NONE |
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* side effects - This common function introduces a client to the rest |
239 |
* of the net, either from a local client connect or |
240 |
* from a remote connect. |
241 |
*/ |
242 |
static void |
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introduce_client(struct Client *source_p) |
244 |
{ |
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dlink_node *node = NULL; |
246 |
char ubuf[IRCD_BUFSIZE] = ""; |
247 |
|
248 |
if (MyClient(source_p)) |
249 |
send_umode(source_p, source_p, 0, ubuf); |
250 |
else |
251 |
send_umode(NULL, source_p, 0, ubuf); |
252 |
|
253 |
watch_check_hash(source_p, RPL_LOGON); |
254 |
|
255 |
if (ubuf[0] == '\0') |
256 |
{ |
257 |
ubuf[0] = '+'; |
258 |
ubuf[1] = '\0'; |
259 |
} |
260 |
|
261 |
DLINK_FOREACH(node, local_server_list.head) |
262 |
{ |
263 |
struct Client *server = node->data; |
264 |
|
265 |
if (server == source_p->from) |
266 |
continue; |
267 |
|
268 |
if (IsCapable(server, CAP_SVS)) |
269 |
sendto_one(server, ":%s UID %s %d %lu %s %s %s %s %s %s :%s", |
270 |
source_p->servptr->id, |
271 |
source_p->name, source_p->hopcount+1, |
272 |
(unsigned long)source_p->tsinfo, |
273 |
ubuf, source_p->username, source_p->host, |
274 |
source_p->sockhost, source_p->id, |
275 |
source_p->account, |
276 |
source_p->info); |
277 |
else |
278 |
sendto_one(server, ":%s UID %s %d %lu %s %s %s %s %s :%s", |
279 |
source_p->servptr->id, |
280 |
source_p->name, source_p->hopcount+1, |
281 |
(unsigned long)source_p->tsinfo, |
282 |
ubuf, source_p->username, source_p->host, |
283 |
source_p->sockhost, source_p->id, source_p->info); |
284 |
|
285 |
if (!EmptyString(source_p->certfp)) |
286 |
sendto_one(server, ":%s CERTFP %s", source_p->id, source_p->certfp); |
287 |
} |
288 |
} |
289 |
|
290 |
/* user_welcome() |
291 |
* |
292 |
* inputs - client pointer to client to welcome |
293 |
* output - NONE |
294 |
* side effects - |
295 |
*/ |
296 |
static void |
297 |
user_welcome(struct Client *source_p) |
298 |
{ |
299 |
#if defined(__TIME__) && defined(__DATE__) |
300 |
static const char built_date[] = __DATE__ " at " __TIME__; |
301 |
#else |
302 |
static const char built_date[] = "unknown"; |
303 |
#endif |
304 |
|
305 |
#ifdef HAVE_LIBCRYPTO |
306 |
if (HasFlag(source_p, FLAGS_SSL)) |
307 |
{ |
308 |
AddUMode(source_p, UMODE_SSL); |
309 |
sendto_one_notice(source_p, &me, ":*** Connected securely via %s", |
310 |
ssl_get_cipher(source_p->connection->fd.ssl)); |
311 |
} |
312 |
#endif |
313 |
|
314 |
sendto_one_numeric(source_p, &me, RPL_WELCOME, ConfigServerInfo.network_name, |
315 |
source_p->name); |
316 |
sendto_one_numeric(source_p, &me, RPL_YOURHOST, |
317 |
get_listener_name(source_p->connection->listener), ircd_version); |
318 |
sendto_one_numeric(source_p, &me, RPL_CREATED, built_date); |
319 |
sendto_one_numeric(source_p, &me, RPL_MYINFO, me.name, ircd_version, umode_buffer); |
320 |
show_isupport(source_p); |
321 |
sendto_one_numeric(source_p, &me, RPL_YOURID, source_p->id); |
322 |
|
323 |
show_lusers(source_p); |
324 |
motd_signon(source_p); |
325 |
} |
326 |
|
327 |
/* check_xline() |
328 |
* |
329 |
* inputs - pointer to client to test |
330 |
* outupt - 1 if exiting 0 if ok |
331 |
* side effects - |
332 |
*/ |
333 |
static int |
334 |
check_xline(struct Client *source_p) |
335 |
{ |
336 |
struct MaskItem *conf = NULL; |
337 |
|
338 |
if ((conf = find_matching_name_conf(CONF_XLINE, source_p->info, NULL, NULL, 0))) |
339 |
{ |
340 |
++conf->count; |
341 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
342 |
"X-line Rejecting [%s] [%s], user %s [%s]", |
343 |
source_p->info, conf->reason, |
344 |
get_client_name(source_p, HIDE_IP), |
345 |
source_p->sockhost); |
346 |
|
347 |
++ServerStats.is_ref; |
348 |
exit_client(source_p, "Bad user info"); |
349 |
return 1; |
350 |
} |
351 |
|
352 |
return 0; |
353 |
} |
354 |
|
355 |
/*! \brief This function is called when both NICK and USER messages |
356 |
* have been accepted for the client, in whatever order. Only |
357 |
* after this, is the UID message propagated. |
358 |
* \param source_p Pointer to given client to introduce |
359 |
*/ |
360 |
void |
361 |
register_local_user(struct Client *source_p) |
362 |
{ |
363 |
const char *id = NULL; |
364 |
const struct MaskItem *conf = NULL; |
365 |
|
366 |
assert(source_p == source_p->from); |
367 |
assert(MyConnect(source_p)); |
368 |
assert(!source_p->connection->registration); |
369 |
|
370 |
if (ConfigGeneral.ping_cookie) |
371 |
{ |
372 |
if (!IsPingSent(source_p) && !source_p->connection->random_ping) |
373 |
{ |
374 |
do |
375 |
source_p->connection->random_ping = genrand_int32(); |
376 |
while (!source_p->connection->random_ping); |
377 |
|
378 |
sendto_one(source_p, "PING :%u", source_p->connection->random_ping); |
379 |
SetPingSent(source_p); |
380 |
return; |
381 |
} |
382 |
|
383 |
if (!HasPingCookie(source_p)) |
384 |
return; |
385 |
} |
386 |
|
387 |
source_p->connection->last_privmsg = CurrentTime; |
388 |
/* Straight up the maximum rate of flooding... */ |
389 |
source_p->connection->allow_read = MAX_FLOOD_BURST; |
390 |
|
391 |
if (!check_client(source_p)) |
392 |
return; |
393 |
|
394 |
if (!valid_hostname(source_p->host)) |
395 |
{ |
396 |
sendto_one_notice(source_p, &me, ":*** Notice -- You have an illegal " |
397 |
"character in your hostname"); |
398 |
strlcpy(source_p->host, source_p->sockhost, sizeof(source_p->host)); |
399 |
} |
400 |
|
401 |
conf = source_p->connection->confs.head->data; |
402 |
|
403 |
if (!IsGotId(source_p)) |
404 |
{ |
405 |
char username[USERLEN + 1] = ""; |
406 |
const char *p = username; |
407 |
unsigned int i = 0; |
408 |
|
409 |
if (IsNeedIdentd(conf)) |
410 |
{ |
411 |
++ServerStats.is_ref; |
412 |
sendto_one_notice(source_p, &me, ":*** Notice -- You need to install " |
413 |
"identd to use this server"); |
414 |
exit_client(source_p, "Install identd"); |
415 |
return; |
416 |
} |
417 |
|
418 |
strlcpy(username, source_p->username, sizeof(username)); |
419 |
|
420 |
if (!IsNoTilde(conf)) |
421 |
source_p->username[i++] = '~'; |
422 |
|
423 |
for (; *p && i < USERLEN; ++p) |
424 |
source_p->username[i++] = *p; |
425 |
|
426 |
source_p->username[i] = '\0'; |
427 |
} |
428 |
|
429 |
/* Password check */ |
430 |
if (!EmptyString(conf->passwd)) |
431 |
{ |
432 |
if (!match_conf_password(source_p->connection->password, conf)) |
433 |
{ |
434 |
++ServerStats.is_ref; |
435 |
|
436 |
sendto_one_numeric(source_p, &me, ERR_PASSWDMISMATCH); |
437 |
exit_client(source_p, "Bad Password"); |
438 |
return; |
439 |
} |
440 |
} |
441 |
|
442 |
/* |
443 |
* Don't free source_p->connection->password here - it can be required |
444 |
* by masked /stats I if there are auth {} blocks with need_password = no; |
445 |
* --adx |
446 |
*/ |
447 |
|
448 |
/* |
449 |
* Report if user has &^>= etc. and set flags as needed in source_p |
450 |
*/ |
451 |
report_and_set_user_flags(source_p, conf); |
452 |
|
453 |
if (IsDead(source_p)) |
454 |
return; |
455 |
|
456 |
/* |
457 |
* Limit clients - |
458 |
* We want to be able to have servers and F-line clients |
459 |
* connect, so save room for "buffer" connections. |
460 |
* Smaller servers may want to decrease this, and it should |
461 |
* probably be just a percentage of the MAXCLIENTS... |
462 |
* -Taner |
463 |
*/ |
464 |
if ((Count.local >= GlobalSetOptions.maxclients + MAX_BUFFER) || |
465 |
(Count.local >= GlobalSetOptions.maxclients && !IsExemptLimits(source_p))) |
466 |
{ |
467 |
sendto_realops_flags(UMODE_FULL, L_ALL, SEND_NOTICE, |
468 |
"Too many clients, rejecting %s[%s].", |
469 |
source_p->name, source_p->host); |
470 |
++ServerStats.is_ref; |
471 |
exit_client(source_p, "Sorry, server is full - try later"); |
472 |
return; |
473 |
} |
474 |
|
475 |
if (!valid_username(source_p->username, 1)) |
476 |
{ |
477 |
char buf[IRCD_BUFSIZE] = ""; |
478 |
|
479 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
480 |
"Invalid username: %s (%s@%s)", |
481 |
source_p->name, source_p->username, source_p->host); |
482 |
++ServerStats.is_ref; |
483 |
snprintf(buf, sizeof(buf), "Invalid username [%s]", source_p->username); |
484 |
exit_client(source_p, buf); |
485 |
return; |
486 |
} |
487 |
|
488 |
if (check_xline(source_p)) |
489 |
return; |
490 |
|
491 |
while (hash_find_id((id = uid_get()))) |
492 |
; |
493 |
|
494 |
strlcpy(source_p->id, id, sizeof(source_p->id)); |
495 |
hash_add_id(source_p); |
496 |
|
497 |
sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE, |
498 |
"Client connecting: %s (%s@%s) [%s] {%s} [%s] <%s>", |
499 |
source_p->name, source_p->username, source_p->host, |
500 |
source_p->sockhost, |
501 |
get_client_class(&source_p->connection->confs), |
502 |
source_p->info, source_p->id); |
503 |
|
504 |
if (ConfigGeneral.invisible_on_connect) |
505 |
{ |
506 |
AddUMode(source_p, UMODE_INVISIBLE); |
507 |
++Count.invisi; |
508 |
} |
509 |
|
510 |
if (++Count.local > Count.max_loc) |
511 |
{ |
512 |
Count.max_loc = Count.local; |
513 |
|
514 |
if (!(Count.max_loc % 10)) |
515 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
516 |
"New maximum local client connections: %u", |
517 |
Count.max_loc); |
518 |
} |
519 |
|
520 |
if (++Count.total > Count.max_tot) |
521 |
Count.max_tot = Count.total; |
522 |
++Count.totalrestartcount; |
523 |
|
524 |
assert(source_p->servptr == &me); |
525 |
SetClient(source_p); |
526 |
dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list); |
527 |
dlinkAdd(source_p, &source_p->node, &global_client_list); |
528 |
|
529 |
assert(dlinkFind(&unknown_list, source_p)); |
530 |
|
531 |
dlink_move_node(&source_p->connection->lclient_node, |
532 |
&unknown_list, &local_client_list); |
533 |
|
534 |
user_welcome(source_p); |
535 |
add_user_host(source_p->username, source_p->host, 0); |
536 |
SetUserHost(source_p); |
537 |
|
538 |
introduce_client(source_p); |
539 |
} |
540 |
|
541 |
/* register_remote_user() |
542 |
* |
543 |
* inputs - source_p remote or directly connected client |
544 |
* - username to register as |
545 |
* - host name to register as |
546 |
* - server name |
547 |
* output - NONE |
548 |
* side effects - This function is called when a remote client |
549 |
* is introduced by a server. |
550 |
*/ |
551 |
void |
552 |
register_remote_user(struct Client *source_p) |
553 |
{ |
554 |
const struct Client *target_p = NULL; |
555 |
|
556 |
if ((target_p = source_p->servptr) && target_p->from != source_p->from) |
557 |
{ |
558 |
sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, |
559 |
"Bad User [%s] :%s USER %s@%s %s, != %s[%s]", |
560 |
source_p->from->name, source_p->name, source_p->username, |
561 |
source_p->host, source_p->servptr->name, |
562 |
target_p->name, target_p->from->name); |
563 |
sendto_one(source_p->from, |
564 |
":%s KILL %s :%s (UID from wrong direction (%s != %s))", |
565 |
me.id, source_p->id, me.name, source_p->servptr->name, |
566 |
target_p->from->name); |
567 |
|
568 |
AddFlag(source_p, FLAGS_KILLED); |
569 |
exit_client(source_p, "UID server wrong direction"); |
570 |
return; |
571 |
} |
572 |
|
573 |
/* |
574 |
* If the nick has been introduced by a services server, |
575 |
* make it a service as well. |
576 |
*/ |
577 |
if (HasFlag(source_p->servptr, FLAGS_SERVICE)) |
578 |
AddFlag(source_p, FLAGS_SERVICE); |
579 |
|
580 |
if (++Count.total > Count.max_tot) |
581 |
Count.max_tot = Count.total; |
582 |
|
583 |
SetClient(source_p); |
584 |
dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list); |
585 |
dlinkAdd(source_p, &source_p->node, &global_client_list); |
586 |
add_user_host(source_p->username, source_p->host, 1); |
587 |
SetUserHost(source_p); |
588 |
|
589 |
if (HasFlag(source_p->servptr, FLAGS_EOB)) |
590 |
{ |
591 |
if (strcmp(source_p->sockhost, "0")) /* XXX: TBR */ |
592 |
sendto_realops_flags(UMODE_FARCONNECT, L_ALL, SEND_NOTICE, |
593 |
"Client connecting at %s: %s (%s@%s) [%s] [%s] <%s>", |
594 |
source_p->servptr->name, |
595 |
source_p->name, source_p->username, source_p->host, |
596 |
source_p->sockhost, source_p->info, source_p->id); |
597 |
else |
598 |
sendto_realops_flags(UMODE_FARCONNECT, L_ALL, SEND_NOTICE, |
599 |
"Client connecting at %s: %s (%s@%s) [%s] <%s>", |
600 |
source_p->servptr->name, |
601 |
source_p->name, source_p->username, source_p->host, |
602 |
source_p->info, source_p->id); |
603 |
} |
604 |
|
605 |
introduce_client(source_p); |
606 |
} |
607 |
|
608 |
/* valid_hostname() |
609 |
* |
610 |
* Inputs - pointer to hostname |
611 |
* Output - 1 if valid, 0 if not |
612 |
* Side effects - check hostname for validity |
613 |
* |
614 |
* NOTE: this doesn't allow a hostname to begin with a dot and |
615 |
* will not allow more dots than chars. |
616 |
*/ |
617 |
int |
618 |
valid_hostname(const char *hostname) |
619 |
{ |
620 |
const char *p = hostname; |
621 |
|
622 |
assert(p); |
623 |
|
624 |
if (EmptyString(p) || *p == '.' || *p == ':') |
625 |
return 0; |
626 |
|
627 |
for (; *p; ++p) |
628 |
if (!IsHostChar(*p)) |
629 |
return 0; |
630 |
|
631 |
return p - hostname <= HOSTLEN; |
632 |
} |
633 |
|
634 |
/* valid_username() |
635 |
* |
636 |
* Inputs - pointer to user |
637 |
* Output - 1 if valid, 0 if not |
638 |
* Side effects - check username for validity |
639 |
* |
640 |
* Absolutely always reject any '*' '!' '?' '@' in an user name |
641 |
* reject any odd control characters names. |
642 |
* Allow '.' in username to allow for "first.last" |
643 |
* style of username |
644 |
*/ |
645 |
int |
646 |
valid_username(const char *username, const int local) |
647 |
{ |
648 |
unsigned int dots = 0; |
649 |
const char *p = username; |
650 |
|
651 |
assert(p); |
652 |
|
653 |
if (*p == '~') |
654 |
++p; |
655 |
|
656 |
/* |
657 |
* Reject usernames that don't start with an alphanum |
658 |
* i.e. reject jokers who have '-@somehost' or '.@somehost' |
659 |
* or "-hi-@somehost", "h-----@somehost" would still be accepted. |
660 |
*/ |
661 |
if (!IsAlNum(*p)) |
662 |
return 0; |
663 |
|
664 |
if (local) |
665 |
{ |
666 |
while (*++p) |
667 |
{ |
668 |
if (*p == '.' && ConfigGeneral.dots_in_ident) |
669 |
{ |
670 |
if (++dots > ConfigGeneral.dots_in_ident) |
671 |
return 0; |
672 |
if (!IsUserChar(*(p + 1))) |
673 |
return 0; |
674 |
} |
675 |
else if (!IsUserChar(*p)) |
676 |
return 0; |
677 |
} |
678 |
} |
679 |
else |
680 |
{ |
681 |
while (*++p) |
682 |
if (!IsUserChar(*p)) |
683 |
return 0; |
684 |
} |
685 |
|
686 |
return p - username <= USERLEN; |
687 |
} |
688 |
|
689 |
/* clean_nick_name() |
690 |
* |
691 |
* input - nickname |
692 |
* - whether it's a local nick (1) or remote (0) |
693 |
* output - none |
694 |
* side effects - walks through the nickname, returning 0 if erroneous |
695 |
*/ |
696 |
int |
697 |
valid_nickname(const char *nickname, const int local) |
698 |
{ |
699 |
const char *p = nickname; |
700 |
|
701 |
assert(p); |
702 |
|
703 |
/* |
704 |
* Nicks can't start with a digit or - or be 0 length. |
705 |
*/ |
706 |
if (EmptyString(p) || *p == '-' || (IsDigit(*p) && local)) |
707 |
return 0; |
708 |
|
709 |
for (; *p; ++p) |
710 |
if (!IsNickChar(*p)) |
711 |
return 0; |
712 |
|
713 |
return p - nickname <= NICKLEN; |
714 |
} |
715 |
|
716 |
/* send_umode() |
717 |
* send the MODE string for user (user) to connection client_p |
718 |
* -avalon |
719 |
* |
720 |
* inputs - client_p |
721 |
* - source_p |
722 |
* - int old |
723 |
* - sendmask mask of modes to send |
724 |
* - suplied umode_buf |
725 |
* output - NONE |
726 |
*/ |
727 |
void |
728 |
send_umode(struct Client *client_p, struct Client *source_p, |
729 |
unsigned int old, char *umode_buf) |
730 |
{ |
731 |
char *m = umode_buf; |
732 |
int what = 0; |
733 |
|
734 |
/* |
735 |
* Build a string in umode_buf to represent the change in the user's |
736 |
* mode between the new (source_p->umodes) and 'old'. |
737 |
*/ |
738 |
for (const struct user_modes *tab = umode_tab; tab->c; ++tab) |
739 |
{ |
740 |
if ((tab->flag & old) && !HasUMode(source_p, tab->flag)) |
741 |
{ |
742 |
if (what == MODE_DEL) |
743 |
*m++ = tab->c; |
744 |
else |
745 |
{ |
746 |
what = MODE_DEL; |
747 |
*m++ = '-'; |
748 |
*m++ = tab->c; |
749 |
} |
750 |
} |
751 |
else if (!(tab->flag & old) && HasUMode(source_p, tab->flag)) |
752 |
{ |
753 |
if (what == MODE_ADD) |
754 |
*m++ = tab->c; |
755 |
else |
756 |
{ |
757 |
what = MODE_ADD; |
758 |
*m++ = '+'; |
759 |
*m++ = tab->c; |
760 |
} |
761 |
} |
762 |
} |
763 |
|
764 |
*m = '\0'; |
765 |
|
766 |
if (*umode_buf && client_p) |
767 |
sendto_one(client_p, ":%s!%s@%s MODE %s :%s", |
768 |
client_p->name, client_p->username, |
769 |
client_p->host, client_p->name, umode_buf); |
770 |
} |
771 |
|
772 |
/* send_umode_out() |
773 |
* |
774 |
* inputs - |
775 |
* output - NONE |
776 |
* side effects - Only send ubuf out to servers that know about this client |
777 |
*/ |
778 |
void |
779 |
send_umode_out(struct Client *source_p, unsigned int old) |
780 |
{ |
781 |
char buf[IRCD_BUFSIZE] = ""; |
782 |
|
783 |
send_umode(MyClient(source_p) ? source_p : NULL, source_p, old, buf); |
784 |
|
785 |
if (buf[0]) |
786 |
sendto_server(source_p, 0, 0, ":%s MODE %s :%s", |
787 |
source_p->id, source_p->id, buf); |
788 |
} |
789 |
|
790 |
void |
791 |
user_set_hostmask(struct Client *target_p, const char *hostname, const int what) |
792 |
{ |
793 |
dlink_node *node = NULL; |
794 |
|
795 |
if (!strcmp(target_p->host, hostname)) |
796 |
return; |
797 |
|
798 |
switch (what) |
799 |
{ |
800 |
case MODE_ADD: |
801 |
AddUMode(target_p, UMODE_HIDDENHOST); |
802 |
break; |
803 |
case MODE_DEL: |
804 |
DelUMode(target_p, UMODE_HIDDENHOST); |
805 |
break; |
806 |
default: return; |
807 |
} |
808 |
|
809 |
if (ConfigGeneral.cycle_on_host_change) |
810 |
sendto_common_channels_local(target_p, 0, 0, ":%s!%s@%s QUIT :Changing hostname", |
811 |
target_p->name, target_p->username, target_p->host); |
812 |
|
813 |
if (IsUserHostIp(target_p)) |
814 |
delete_user_host(target_p->username, target_p->host, !MyConnect(target_p)); |
815 |
|
816 |
strlcpy(target_p->host, hostname, sizeof(target_p->host)); |
817 |
|
818 |
add_user_host(target_p->username, target_p->host, !MyConnect(target_p)); |
819 |
SetUserHost(target_p); |
820 |
|
821 |
if (MyClient(target_p)) |
822 |
{ |
823 |
sendto_one_numeric(target_p, &me, RPL_VISIBLEHOST, target_p->host); |
824 |
clear_ban_cache_client(target_p); |
825 |
} |
826 |
|
827 |
if (!ConfigGeneral.cycle_on_host_change) |
828 |
return; |
829 |
|
830 |
DLINK_FOREACH(node, target_p->channel.head) |
831 |
{ |
832 |
char modebuf[4], nickbuf[NICKLEN * 3 + 3] = ""; |
833 |
char *p = modebuf; |
834 |
int len = 0; |
835 |
const struct Membership *member = node->data; |
836 |
|
837 |
if (has_member_flags(member, CHFL_CHANOP)) |
838 |
{ |
839 |
*p++ = 'o'; |
840 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name); |
841 |
} |
842 |
|
843 |
if (has_member_flags(member, CHFL_HALFOP)) |
844 |
{ |
845 |
*p++ = 'h'; |
846 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name); |
847 |
} |
848 |
|
849 |
if (has_member_flags(member, CHFL_VOICE)) |
850 |
{ |
851 |
*p++ = 'v'; |
852 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name); |
853 |
} |
854 |
|
855 |
*p = '\0'; |
856 |
|
857 |
|
858 |
sendto_channel_local_butone(target_p, CAP_EXTENDED_JOIN, 0, member->chptr, ":%s!%s@%s JOIN %s %s :%s", |
859 |
target_p->name, target_p->username, |
860 |
target_p->host, member->chptr->name, |
861 |
(!IsDigit(target_p->account[0]) && target_p->account[0] != '*') ? target_p->account : "*", |
862 |
target_p->info); |
863 |
sendto_channel_local_butone(target_p, 0, CAP_EXTENDED_JOIN, member->chptr, ":%s!%s@%s JOIN :%s", |
864 |
target_p->name, target_p->username, |
865 |
target_p->host, member->chptr->name); |
866 |
|
867 |
if (nickbuf[0]) |
868 |
sendto_channel_local_butone(target_p, 0, 0, member->chptr, ":%s MODE %s +%s %s", |
869 |
target_p->servptr->name, member->chptr->name, |
870 |
modebuf, nickbuf); |
871 |
|
872 |
} |
873 |
|
874 |
if (target_p->away[0]) |
875 |
sendto_common_channels_local(target_p, 0, CAP_AWAY_NOTIFY, |
876 |
":%s!%s@%s AWAY :%s", |
877 |
target_p->name, target_p->username, |
878 |
target_p->host, target_p->away); |
879 |
} |
880 |
|
881 |
/*! \brief Blindly opers up given source_p, using conf info. |
882 |
* All checks on passwords have already been done. |
883 |
* \param source_p Pointer to given client to oper |
884 |
*/ |
885 |
void |
886 |
oper_up(struct Client *source_p) |
887 |
{ |
888 |
const unsigned int old = source_p->umodes; |
889 |
const struct MaskItem *const conf = source_p->connection->confs.head->data; |
890 |
|
891 |
assert(source_p->connection->confs.head); |
892 |
|
893 |
++Count.oper; |
894 |
SetOper(source_p); |
895 |
|
896 |
if (conf->modes) |
897 |
AddUMode(source_p, conf->modes); |
898 |
else if (ConfigGeneral.oper_umodes) |
899 |
AddUMode(source_p, ConfigGeneral.oper_umodes); |
900 |
|
901 |
if (!(old & UMODE_INVISIBLE) && HasUMode(source_p, UMODE_INVISIBLE)) |
902 |
++Count.invisi; |
903 |
if ((old & UMODE_INVISIBLE) && !HasUMode(source_p, UMODE_INVISIBLE)) |
904 |
--Count.invisi; |
905 |
|
906 |
assert(dlinkFind(&oper_list, source_p) == NULL); |
907 |
dlinkAdd(source_p, make_dlink_node(), &oper_list); |
908 |
|
909 |
AddOFlag(source_p, conf->port); |
910 |
|
911 |
if (HasOFlag(source_p, OPER_FLAG_ADMIN)) |
912 |
AddUMode(source_p, UMODE_ADMIN); |
913 |
|
914 |
if (!EmptyString(conf->whois)) |
915 |
{ |
916 |
client_attach_svstag(source_p, RPL_WHOISOPERATOR, "+", conf->whois); |
917 |
sendto_server(source_p, 0, 0, ":%s SVSTAG %s %lu %u + :%s", |
918 |
me.id, source_p->id, (unsigned long)source_p->tsinfo, |
919 |
RPL_WHOISOPERATOR, conf->whois); |
920 |
} |
921 |
|
922 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "%s is now an operator", |
923 |
get_oper_name(source_p)); |
924 |
sendto_server(NULL, 0, 0, ":%s GLOBOPS :%s is now an operator", |
925 |
me.id, get_oper_name(source_p)); |
926 |
send_umode_out(source_p, old); |
927 |
sendto_one_numeric(source_p, &me, RPL_YOUREOPER); |
928 |
} |
929 |
|
930 |
static char new_uid[TOTALSIDUID + 1]; /* Allow for \0 */ |
931 |
|
932 |
int |
933 |
valid_sid(const char *sid) |
934 |
{ |
935 |
if (strlen(sid) == IRC_MAXSID) |
936 |
if (IsDigit(*sid)) |
937 |
if (IsAlNum(*(sid + 1)) && IsAlNum(*(sid + 2))) |
938 |
return 1; |
939 |
|
940 |
return 0; |
941 |
} |
942 |
|
943 |
/* |
944 |
* init_uid() |
945 |
* |
946 |
* inputs - NONE |
947 |
* output - NONE |
948 |
* side effects - new_uid is filled in with server id portion (sid) |
949 |
* (first 3 bytes) or defaulted to 'A'. |
950 |
* Rest is filled in with 'A' |
951 |
*/ |
952 |
void |
953 |
init_uid(void) |
954 |
{ |
955 |
memset(new_uid, 0, sizeof(new_uid)); |
956 |
|
957 |
if (!EmptyString(ConfigServerInfo.sid)) |
958 |
strlcpy(new_uid, ConfigServerInfo.sid, sizeof(new_uid)); |
959 |
|
960 |
for (unsigned int i = 0; i < IRC_MAXSID; ++i) |
961 |
if (new_uid[i] == '\0') |
962 |
new_uid[i] = 'A'; |
963 |
|
964 |
/* NOTE: if IRC_MAXUID != 6, this will have to be rewritten */ |
965 |
memcpy(new_uid + IRC_MAXSID, "AAAAA@", IRC_MAXUID); |
966 |
} |
967 |
|
968 |
/* |
969 |
* add_one_to_uid |
970 |
* |
971 |
* inputs - index number into new_uid |
972 |
* output - NONE |
973 |
* side effects - new_uid is incremented by one |
974 |
* note this is a recursive function |
975 |
*/ |
976 |
static void |
977 |
add_one_to_uid(unsigned int i) |
978 |
{ |
979 |
if (i != IRC_MAXSID) /* Not reached server SID portion yet? */ |
980 |
{ |
981 |
if (new_uid[i] == 'Z') |
982 |
new_uid[i] = '0'; |
983 |
else if (new_uid[i] == '9') |
984 |
{ |
985 |
new_uid[i] = 'A'; |
986 |
add_one_to_uid(i - 1); |
987 |
} |
988 |
else |
989 |
++new_uid[i]; |
990 |
} |
991 |
else |
992 |
{ |
993 |
/* NOTE: if IRC_MAXUID != 6, this will have to be rewritten */ |
994 |
if (new_uid[i] == 'Z') |
995 |
memcpy(new_uid + IRC_MAXSID, "AAAAAA", IRC_MAXUID); |
996 |
else |
997 |
++new_uid[i]; |
998 |
} |
999 |
} |
1000 |
|
1001 |
/* |
1002 |
* uid_get |
1003 |
* |
1004 |
* inputs - struct Client * |
1005 |
* output - new UID is returned to caller |
1006 |
* side effects - new_uid is incremented by one. |
1007 |
*/ |
1008 |
static const char * |
1009 |
uid_get(void) |
1010 |
{ |
1011 |
add_one_to_uid(TOTALSIDUID - 1); /* Index from 0 */ |
1012 |
return new_uid; |
1013 |
} |
1014 |
|
1015 |
/* |
1016 |
* init_isupport() |
1017 |
* |
1018 |
* input - NONE |
1019 |
* output - NONE |
1020 |
* side effects - Must be called before isupport is enabled |
1021 |
*/ |
1022 |
void |
1023 |
init_isupport(void) |
1024 |
{ |
1025 |
add_isupport("CALLERID", NULL, -1); |
1026 |
add_isupport("CASEMAPPING", "rfc1459", -1); |
1027 |
add_isupport("DEAF", "D", -1); |
1028 |
add_isupport("KICKLEN", NULL, KICKLEN); |
1029 |
add_isupport("MODES", NULL, MAXMODEPARAMS); |
1030 |
add_isupport("PREFIX", "(ohv)@%+", -1); |
1031 |
add_isupport("STATUSMSG", "@%+", -1); |
1032 |
add_isupport("EXCEPTS", NULL, -1); |
1033 |
add_isupport("INVEX", NULL, -1); |
1034 |
} |
1035 |
|
1036 |
/* |
1037 |
* add_isupport() |
1038 |
* |
1039 |
* input - name of supported function |
1040 |
* - options if any |
1041 |
* - number if any |
1042 |
* output - NONE |
1043 |
* side effects - Each supported item must call this when activated |
1044 |
*/ |
1045 |
void |
1046 |
add_isupport(const char *name, const char *options, int n) |
1047 |
{ |
1048 |
dlink_node *node = NULL; |
1049 |
struct Isupport *support = NULL; |
1050 |
|
1051 |
DLINK_FOREACH(node, support_list.head) |
1052 |
{ |
1053 |
support = node->data; |
1054 |
if (irccmp(support->name, name) == 0) |
1055 |
{ |
1056 |
MyFree(support->name); |
1057 |
MyFree(support->options); |
1058 |
break; |
1059 |
} |
1060 |
} |
1061 |
|
1062 |
if (node == NULL) |
1063 |
{ |
1064 |
support = MyCalloc(sizeof(*support)); |
1065 |
dlinkAddTail(support, &support->node, &support_list); |
1066 |
} |
1067 |
|
1068 |
support->name = xstrdup(name); |
1069 |
if (options) |
1070 |
support->options = xstrdup(options); |
1071 |
support->number = n; |
1072 |
|
1073 |
rebuild_isupport_message_line(); |
1074 |
} |
1075 |
|
1076 |
/* |
1077 |
* delete_isupport() |
1078 |
* |
1079 |
* input - name of supported function |
1080 |
* output - NONE |
1081 |
* side effects - Each supported item must call this when deactivated |
1082 |
*/ |
1083 |
void |
1084 |
delete_isupport(const char *name) |
1085 |
{ |
1086 |
dlink_node *node = NULL; |
1087 |
|
1088 |
DLINK_FOREACH(node, support_list.head) |
1089 |
{ |
1090 |
struct Isupport *support = node->data; |
1091 |
|
1092 |
if (irccmp(support->name, name) == 0) |
1093 |
{ |
1094 |
dlinkDelete(node, &support_list); |
1095 |
MyFree(support->name); |
1096 |
MyFree(support->options); |
1097 |
MyFree(support); |
1098 |
break; |
1099 |
} |
1100 |
} |
1101 |
|
1102 |
rebuild_isupport_message_line(); |
1103 |
} |
1104 |
|
1105 |
/* |
1106 |
* rebuild_isupport_message_line |
1107 |
* |
1108 |
* input - NONE |
1109 |
* output - NONE |
1110 |
* side effects - Destroy the isupport MessageFile lines, and rebuild. |
1111 |
*/ |
1112 |
void |
1113 |
rebuild_isupport_message_line(void) |
1114 |
{ |
1115 |
char isupportbuffer[IRCD_BUFSIZE]; |
1116 |
char *p = isupportbuffer; |
1117 |
dlink_node *node = NULL, *node_next = NULL; |
1118 |
int n = 0; |
1119 |
int tokens = 0; |
1120 |
size_t len = 0; |
1121 |
size_t reserve = strlen(me.name) + HOSTLEN + strlen(numeric_form(RPL_ISUPPORT)); |
1122 |
|
1123 |
DLINK_FOREACH_SAFE(node, node_next, support_list_lines.head) |
1124 |
{ |
1125 |
dlinkDelete(node, &support_list_lines); |
1126 |
MyFree(node->data); |
1127 |
free_dlink_node(node); |
1128 |
} |
1129 |
|
1130 |
DLINK_FOREACH(node, support_list.head) |
1131 |
{ |
1132 |
struct Isupport *support = node->data; |
1133 |
|
1134 |
p += (n = sprintf(p, "%s", support->name)); |
1135 |
len += n; |
1136 |
|
1137 |
if (support->options) |
1138 |
{ |
1139 |
p += (n = sprintf(p, "=%s", support->options)); |
1140 |
len += n; |
1141 |
} |
1142 |
|
1143 |
if (support->number > 0) |
1144 |
{ |
1145 |
p += (n = sprintf(p, "=%d", support->number)); |
1146 |
len += n; |
1147 |
} |
1148 |
|
1149 |
*p++ = ' '; |
1150 |
len++; |
1151 |
*p = '\0'; |
1152 |
|
1153 |
if (++tokens == (MAXPARA-2) || len >= (sizeof(isupportbuffer)-reserve)) |
1154 |
{ /* arbritrary for now */ |
1155 |
if (*--p == ' ') |
1156 |
*p = '\0'; |
1157 |
|
1158 |
dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &support_list_lines); |
1159 |
p = isupportbuffer; |
1160 |
len = 0; |
1161 |
n = tokens = 0; |
1162 |
} |
1163 |
} |
1164 |
|
1165 |
if (len) |
1166 |
{ |
1167 |
if (*--p == ' ') |
1168 |
*p = '\0'; |
1169 |
dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &support_list_lines); |
1170 |
} |
1171 |
} |