1 |
/* |
2 |
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
3 |
* |
4 |
* Copyright (c) 1997-2014 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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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" |
28 |
#include "list.h" |
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#include "user.h" |
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#include "channel.h" |
31 |
#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" |
37 |
#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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|
51 |
static char umode_buffer[IRCD_BUFSIZE]; |
52 |
static const char *uid_get(void); |
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|
54 |
/* Used for building up the isupport string, |
55 |
* used with init_isupport, add_isupport, delete_isupport |
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*/ |
57 |
struct Isupport |
58 |
{ |
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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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/* memory is cheap. map 0-255 to equivalent mode */ |
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const unsigned int user_modes[256] = |
70 |
{ |
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/* 0x00 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x0F */ |
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/* 0x10 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x1F */ |
73 |
/* 0x20 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x2F */ |
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/* 0x30 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x3F */ |
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0, /* @ */ |
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0, /* A */ |
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0, /* B */ |
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0, /* C */ |
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UMODE_DEAF, /* D */ |
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0, /* E */ |
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UMODE_FARCONNECT, /* F */ |
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UMODE_SOFTCALLERID, /* G */ |
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UMODE_HIDDEN, /* H */ |
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0, /* I */ |
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0, /* J */ |
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0, /* K */ |
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0, /* L */ |
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0, /* M */ |
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0, /* N */ |
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0, /* O */ |
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0, /* P */ |
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0, /* Q */ |
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UMODE_REGONLY, /* R */ |
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UMODE_SSL, /* S */ |
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0, /* T */ |
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0, /* U */ |
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0, /* V */ |
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UMODE_WEBIRC, /* W */ |
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0, /* X */ |
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0, /* Y */ |
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0, /* Z 0x5A */ |
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0, 0, 0, 0, 0, /* 0x5F */ |
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0, /* 0x60 */ |
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UMODE_ADMIN, /* a */ |
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UMODE_BOTS, /* b */ |
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UMODE_CCONN, /* c */ |
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UMODE_DEBUG, /* d */ |
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UMODE_EXTERNAL, /* e */ |
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UMODE_FULL, /* f */ |
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UMODE_CALLERID, /* g */ |
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0, /* h */ |
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UMODE_INVISIBLE, /* i */ |
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UMODE_REJ, /* j */ |
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UMODE_SKILL, /* k */ |
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UMODE_LOCOPS, /* l */ |
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0, /* m */ |
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UMODE_NCHANGE, /* n */ |
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UMODE_OPER, /* o */ |
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UMODE_HIDECHANS, /* p */ |
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UMODE_HIDEIDLE, /* q */ |
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UMODE_REGISTERED, /* r */ |
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UMODE_SERVNOTICE, /* s */ |
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0, /* t */ |
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UMODE_UNAUTH, /* u */ |
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0, /* v */ |
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UMODE_WALLOP, /* w */ |
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UMODE_HIDDENHOST, /* x */ |
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UMODE_SPY, /* y */ |
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0, /* z 0x7A */ |
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0,0,0,0,0, /* 0x7B - 0x7F */ |
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|
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/* 0x80 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x8F */ |
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/* 0x90 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x9F */ |
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/* 0xA0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xAF */ |
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/* 0xB0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xBF */ |
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/* 0xC0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xCF */ |
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/* 0xD0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xDF */ |
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/* 0xE0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xEF */ |
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/* 0xF0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 /* 0xFF */ |
140 |
}; |
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|
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void |
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assemble_umode_buffer(void) |
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{ |
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unsigned int idx = 0; |
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char *umode_buffer_ptr = umode_buffer; |
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|
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for (; idx < (sizeof(user_modes) / sizeof(user_modes[0])); ++idx) |
149 |
if (user_modes[idx]) |
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*umode_buffer_ptr++ = idx; |
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|
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*umode_buffer_ptr = '\0'; |
153 |
} |
154 |
|
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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_serv_list)); |
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else |
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sendto_one_numeric(source_p, &me, RPL_LUSERCLIENT, |
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(Count.total - Count.invisi), 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); |
189 |
} |
190 |
|
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sendto_one_numeric(source_p, &me, RPL_GLOBALUSERS, Count.total, Count.max_tot); |
192 |
|
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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); |
196 |
|
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if (Count.local > Count.max_loc_cli) |
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Count.max_loc_cli = Count.local; |
199 |
|
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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; |
202 |
} |
203 |
|
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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) |
209 |
*/ |
210 |
void |
211 |
show_isupport(struct Client *source_p) |
212 |
{ |
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const dlink_node *ptr = NULL; |
214 |
|
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DLINK_FOREACH(ptr, support_list_lines.head) |
216 |
sendto_one_numeric(source_p, &me, RPL_ISUPPORT, ptr->data); |
217 |
} |
218 |
|
219 |
|
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/* report_and_set_user_flags() |
221 |
* |
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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 |
226 |
* they are getting, and set them. |
227 |
*/ |
228 |
static void |
229 |
report_and_set_user_flags(struct Client *source_p, const struct MaskItem *conf) |
230 |
{ |
231 |
/* If this user is being spoofed, tell them so */ |
232 |
if (IsConfDoSpoofIp(conf)) |
233 |
sendto_one_notice(source_p, &me, ":*** Spoofing your IP. Congrats."); |
234 |
|
235 |
/* If this user is in the exception class, Set it "E lined" */ |
236 |
if (IsConfExemptKline(conf)) |
237 |
{ |
238 |
SetExemptKline(source_p); |
239 |
sendto_one_notice(source_p, &me, ":*** You are exempt from K/D/G lines. Congrats."); |
240 |
} |
241 |
|
242 |
/* |
243 |
* The else here is to make sure that G line exempt users |
244 |
* do not get noticed twice. |
245 |
*/ |
246 |
else if (IsConfExemptGline(conf)) |
247 |
{ |
248 |
SetExemptGline(source_p); |
249 |
sendto_one_notice(source_p, &me, ":*** You are exempt from G lines. Congrats."); |
250 |
} |
251 |
|
252 |
if (IsConfExemptResv(conf)) |
253 |
{ |
254 |
SetExemptResv(source_p); |
255 |
sendto_one_notice(source_p, &me, ":*** You are exempt from resvs. Congrats."); |
256 |
} |
257 |
|
258 |
/* If this user is exempt from user limits set it "F lined" */ |
259 |
if (IsConfExemptLimits(conf)) |
260 |
{ |
261 |
SetExemptLimits(source_p); |
262 |
sendto_one_notice(source_p, &me, ":*** You are exempt from user limits. Congrats."); |
263 |
} |
264 |
|
265 |
if (IsConfCanFlood(conf)) |
266 |
{ |
267 |
SetCanFlood(source_p); |
268 |
sendto_one_notice(source_p, &me, ":*** You are exempt from flood " |
269 |
"protection, aren't you fearsome."); |
270 |
} |
271 |
} |
272 |
|
273 |
/* introduce_client() |
274 |
* |
275 |
* inputs - source_p |
276 |
* output - NONE |
277 |
* side effects - This common function introduces a client to the rest |
278 |
* of the net, either from a local client connect or |
279 |
* from a remote connect. |
280 |
*/ |
281 |
static void |
282 |
introduce_client(struct Client *source_p) |
283 |
{ |
284 |
dlink_node *ptr = NULL; |
285 |
char ubuf[IRCD_BUFSIZE] = ""; |
286 |
|
287 |
if (MyClient(source_p)) |
288 |
send_umode(source_p, source_p, 0, ubuf); |
289 |
else |
290 |
send_umode(NULL, source_p, 0, ubuf); |
291 |
|
292 |
watch_check_hash(source_p, RPL_LOGON); |
293 |
|
294 |
if (ubuf[0] == '\0') |
295 |
{ |
296 |
ubuf[0] = '+'; |
297 |
ubuf[1] = '\0'; |
298 |
} |
299 |
|
300 |
DLINK_FOREACH(ptr, serv_list.head) |
301 |
{ |
302 |
struct Client *server = ptr->data; |
303 |
|
304 |
if (server == source_p->from) |
305 |
continue; |
306 |
|
307 |
if (IsCapable(server, CAP_SVS)) |
308 |
sendto_one(server, ":%s UID %s %d %lu %s %s %s %s %s %s :%s", |
309 |
source_p->servptr->id, |
310 |
source_p->name, source_p->hopcount+1, |
311 |
(unsigned long)source_p->tsinfo, |
312 |
ubuf, source_p->username, source_p->host, |
313 |
(MyClient(source_p) && IsIPSpoof(source_p)) ? |
314 |
"0" : source_p->sockhost, source_p->id, |
315 |
source_p->svid, |
316 |
source_p->info); |
317 |
else |
318 |
sendto_one(server, ":%s UID %s %d %lu %s %s %s %s %s :%s", |
319 |
source_p->servptr->id, |
320 |
source_p->name, source_p->hopcount+1, |
321 |
(unsigned long)source_p->tsinfo, |
322 |
ubuf, source_p->username, source_p->host, |
323 |
(MyClient(source_p) && IsIPSpoof(source_p)) ? |
324 |
"0" : source_p->sockhost, source_p->id, source_p->info); |
325 |
|
326 |
if (!EmptyString(source_p->certfp)) |
327 |
sendto_one(server, ":%s CERTFP %s", source_p->id, source_p->certfp); |
328 |
} |
329 |
} |
330 |
|
331 |
/* user_welcome() |
332 |
* |
333 |
* inputs - client pointer to client to welcome |
334 |
* output - NONE |
335 |
* side effects - |
336 |
*/ |
337 |
static void |
338 |
user_welcome(struct Client *source_p) |
339 |
{ |
340 |
#if defined(__TIME__) && defined(__DATE__) |
341 |
static const char built_date[] = __DATE__ " at " __TIME__; |
342 |
#else |
343 |
static const char built_date[] = "unknown"; |
344 |
#endif |
345 |
|
346 |
#ifdef HAVE_LIBCRYPTO |
347 |
if (HasFlag(source_p, FLAGS_SSL)) |
348 |
{ |
349 |
AddUMode(source_p, UMODE_SSL); |
350 |
sendto_one_notice(source_p, &me, ":*** Connected securely via %s", |
351 |
ssl_get_cipher(source_p->localClient->fd.ssl)); |
352 |
} |
353 |
#endif |
354 |
|
355 |
sendto_one_numeric(source_p, &me, RPL_WELCOME, ServerInfo.network_name, |
356 |
source_p->name); |
357 |
sendto_one_numeric(source_p, &me, RPL_YOURHOST, |
358 |
get_listener_name(source_p->localClient->listener), ircd_version); |
359 |
sendto_one_numeric(source_p, &me, RPL_CREATED, built_date); |
360 |
sendto_one_numeric(source_p, &me, RPL_MYINFO, me.name, ircd_version, umode_buffer); |
361 |
show_isupport(source_p); |
362 |
|
363 |
if (source_p->id[0]) |
364 |
sendto_one_numeric(source_p, &me, RPL_YOURID, source_p->id); |
365 |
|
366 |
show_lusers(source_p); |
367 |
motd_signon(source_p); |
368 |
} |
369 |
|
370 |
/* check_xline() |
371 |
* |
372 |
* inputs - pointer to client to test |
373 |
* outupt - 1 if exiting 0 if ok |
374 |
* side effects - |
375 |
*/ |
376 |
static int |
377 |
check_xline(struct Client *source_p) |
378 |
{ |
379 |
struct MaskItem *conf = NULL; |
380 |
const char *reason = NULL; |
381 |
|
382 |
if ((conf = find_matching_name_conf(CONF_XLINE, source_p->info, NULL, NULL, 0))) |
383 |
{ |
384 |
++conf->count; |
385 |
|
386 |
if (conf->reason) |
387 |
reason = conf->reason; |
388 |
else |
389 |
reason = CONF_NOREASON; |
390 |
|
391 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
392 |
"X-line Rejecting [%s] [%s], user %s [%s]", |
393 |
source_p->info, reason, |
394 |
get_client_name(source_p, HIDE_IP), |
395 |
source_p->sockhost); |
396 |
|
397 |
++ServerStats.is_ref; |
398 |
exit_client(source_p, "Bad user info"); |
399 |
return 1; |
400 |
} |
401 |
|
402 |
return 0; |
403 |
} |
404 |
|
405 |
/*! \brief This function is called when both NICK and USER messages |
406 |
* have been accepted for the client, in whatever order. Only |
407 |
* after this, is the UID message propagated. |
408 |
* \param source_p Pointer to given client to introduce |
409 |
*/ |
410 |
void |
411 |
register_local_user(struct Client *source_p) |
412 |
{ |
413 |
const char *id = NULL; |
414 |
const struct MaskItem *conf = NULL; |
415 |
|
416 |
assert(source_p == source_p->from); |
417 |
assert(MyConnect(source_p)); |
418 |
assert(!source_p->localClient->registration); |
419 |
|
420 |
ClearCap(source_p, CAP_TS6); |
421 |
|
422 |
if (ConfigFileEntry.ping_cookie) |
423 |
{ |
424 |
if (!IsPingSent(source_p) && !source_p->localClient->random_ping) |
425 |
{ |
426 |
do |
427 |
source_p->localClient->random_ping = genrand_int32(); |
428 |
while (!source_p->localClient->random_ping); |
429 |
|
430 |
sendto_one(source_p, "PING :%u", |
431 |
source_p->localClient->random_ping); |
432 |
SetPingSent(source_p); |
433 |
return; |
434 |
} |
435 |
|
436 |
if (!HasPingCookie(source_p)) |
437 |
return; |
438 |
} |
439 |
|
440 |
source_p->localClient->last_privmsg = CurrentTime; |
441 |
/* Straight up the maximum rate of flooding... */ |
442 |
source_p->localClient->allow_read = MAX_FLOOD_BURST; |
443 |
|
444 |
if (!check_client(source_p)) |
445 |
return; |
446 |
|
447 |
if (!valid_hostname(source_p->host)) |
448 |
{ |
449 |
sendto_one_notice(source_p, &me, ":*** Notice -- You have an illegal " |
450 |
"character in your hostname"); |
451 |
strlcpy(source_p->host, source_p->sockhost, |
452 |
sizeof(source_p->host)); |
453 |
} |
454 |
|
455 |
conf = source_p->localClient->confs.head->data; |
456 |
|
457 |
if (!IsGotId(source_p)) |
458 |
{ |
459 |
char username[USERLEN + 1] = ""; |
460 |
const char *p = username; |
461 |
unsigned int i = 0; |
462 |
|
463 |
if (IsNeedIdentd(conf)) |
464 |
{ |
465 |
++ServerStats.is_ref; |
466 |
sendto_one_notice(source_p, &me, ":*** Notice -- You need to install " |
467 |
"identd to use this server"); |
468 |
exit_client(source_p, "Install identd"); |
469 |
return; |
470 |
} |
471 |
|
472 |
strlcpy(username, source_p->username, sizeof(username)); |
473 |
|
474 |
if (!IsNoTilde(conf)) |
475 |
source_p->username[i++] = '~'; |
476 |
|
477 |
for (; *p && i < USERLEN; ++p) |
478 |
if (*p != '[') |
479 |
source_p->username[i++] = *p; |
480 |
|
481 |
source_p->username[i] = '\0'; |
482 |
} |
483 |
|
484 |
/* Password check */ |
485 |
if (!EmptyString(conf->passwd)) |
486 |
{ |
487 |
if (!match_conf_password(source_p->localClient->passwd, conf)) |
488 |
{ |
489 |
++ServerStats.is_ref; |
490 |
|
491 |
sendto_one_numeric(source_p, &me, ERR_PASSWDMISMATCH); |
492 |
exit_client(source_p, "Bad Password"); |
493 |
return; |
494 |
} |
495 |
} |
496 |
|
497 |
/* |
498 |
* Don't free source_p->localClient->passwd here - it can be required |
499 |
* by masked /stats I if there are auth{} blocks with need_password = no; |
500 |
* --adx |
501 |
*/ |
502 |
|
503 |
/* |
504 |
* Report if user has &^>= etc. and set flags as needed in source_p |
505 |
*/ |
506 |
report_and_set_user_flags(source_p, conf); |
507 |
|
508 |
if (IsDead(source_p)) |
509 |
return; |
510 |
|
511 |
/* |
512 |
* Limit clients - |
513 |
* We want to be able to have servers and F-line clients |
514 |
* connect, so save room for "buffer" connections. |
515 |
* Smaller servers may want to decrease this, and it should |
516 |
* probably be just a percentage of the MAXCLIENTS... |
517 |
* -Taner |
518 |
*/ |
519 |
if ((Count.local >= ServerInfo.max_clients + MAX_BUFFER) || |
520 |
(Count.local >= ServerInfo.max_clients && !IsExemptLimits(source_p))) |
521 |
{ |
522 |
sendto_realops_flags(UMODE_FULL, L_ALL, SEND_NOTICE, |
523 |
"Too many clients, rejecting %s[%s].", |
524 |
source_p->name, source_p->host); |
525 |
++ServerStats.is_ref; |
526 |
exit_client(source_p, "Sorry, server is full - try later"); |
527 |
return; |
528 |
} |
529 |
|
530 |
if (!valid_username(source_p->username, 1)) |
531 |
{ |
532 |
char buf[IRCD_BUFSIZE] = ""; |
533 |
|
534 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
535 |
"Invalid username: %s (%s@%s)", |
536 |
source_p->name, source_p->username, source_p->host); |
537 |
++ServerStats.is_ref; |
538 |
snprintf(buf, sizeof(buf), "Invalid username [%s]", source_p->username); |
539 |
exit_client(source_p, buf); |
540 |
return; |
541 |
} |
542 |
|
543 |
if (check_xline(source_p)) |
544 |
return; |
545 |
|
546 |
while (hash_find_id((id = uid_get()))) |
547 |
; |
548 |
|
549 |
strlcpy(source_p->id, id, sizeof(source_p->id)); |
550 |
hash_add_id(source_p); |
551 |
|
552 |
sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE, |
553 |
"Client connecting: %s (%s@%s) [%s] {%s} [%s] <%s>", |
554 |
source_p->name, source_p->username, source_p->host, |
555 |
ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ? |
556 |
"255.255.255.255" : source_p->sockhost, |
557 |
get_client_class(&source_p->localClient->confs), |
558 |
source_p->info, source_p->id); |
559 |
|
560 |
if (ConfigFileEntry.invisible_on_connect) |
561 |
{ |
562 |
AddUMode(source_p, UMODE_INVISIBLE); |
563 |
++Count.invisi; |
564 |
} |
565 |
|
566 |
if (++Count.local > Count.max_loc) |
567 |
{ |
568 |
Count.max_loc = Count.local; |
569 |
|
570 |
if (!(Count.max_loc % 10)) |
571 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
572 |
"New Max Local Clients: %d", |
573 |
Count.max_loc); |
574 |
} |
575 |
|
576 |
if (++Count.total > Count.max_tot) |
577 |
Count.max_tot = Count.total; |
578 |
++Count.totalrestartcount; |
579 |
|
580 |
assert(source_p->servptr == &me); |
581 |
SetClient(source_p); |
582 |
dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list); |
583 |
|
584 |
assert(dlinkFind(&unknown_list, source_p)); |
585 |
|
586 |
dlink_move_node(&source_p->localClient->lclient_node, |
587 |
&unknown_list, &local_client_list); |
588 |
|
589 |
user_welcome(source_p); |
590 |
add_user_host(source_p->username, source_p->host, 0); |
591 |
SetUserHost(source_p); |
592 |
|
593 |
introduce_client(source_p); |
594 |
} |
595 |
|
596 |
/* register_remote_user() |
597 |
* |
598 |
* inputs - source_p remote or directly connected client |
599 |
* - username to register as |
600 |
* - host name to register as |
601 |
* - server name |
602 |
* output - NONE |
603 |
* side effects - This function is called when a remote client |
604 |
* is introduced by a server. |
605 |
*/ |
606 |
void |
607 |
register_remote_user(struct Client *source_p) |
608 |
{ |
609 |
struct Client *target_p = NULL; |
610 |
|
611 |
if ((target_p = source_p->servptr) && target_p->from != source_p->from) |
612 |
{ |
613 |
sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, |
614 |
"Bad User [%s] :%s USER %s@%s %s, != %s[%s]", |
615 |
source_p->from->name, source_p->name, source_p->username, |
616 |
source_p->host, source_p->servptr->name, |
617 |
target_p->name, target_p->from->name); |
618 |
sendto_one(source_p->from, |
619 |
":%s KILL %s :%s (NICK from wrong direction (%s != %s))", |
620 |
me.id, source_p->id, me.name, source_p->servptr->name, |
621 |
target_p->from->name); |
622 |
|
623 |
AddFlag(source_p, FLAGS_KILLED); |
624 |
exit_client(source_p, "USER server wrong direction"); |
625 |
return; |
626 |
} |
627 |
|
628 |
/* |
629 |
* If the nick has been introduced by a services server, |
630 |
* make it a service as well. |
631 |
*/ |
632 |
if (HasFlag(source_p->servptr, FLAGS_SERVICE)) |
633 |
AddFlag(source_p, FLAGS_SERVICE); |
634 |
|
635 |
if (++Count.total > Count.max_tot) |
636 |
Count.max_tot = Count.total; |
637 |
|
638 |
SetClient(source_p); |
639 |
dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list); |
640 |
add_user_host(source_p->username, source_p->host, 1); |
641 |
SetUserHost(source_p); |
642 |
|
643 |
if (HasFlag(source_p->servptr, FLAGS_EOB)) |
644 |
sendto_realops_flags(UMODE_FARCONNECT, L_ALL, SEND_NOTICE, |
645 |
"Client connecting at %s: %s (%s@%s) [%s] <%s>", |
646 |
source_p->servptr->name, |
647 |
source_p->name, source_p->username, source_p->host, |
648 |
source_p->info, source_p->id); |
649 |
|
650 |
introduce_client(source_p); |
651 |
} |
652 |
|
653 |
/* valid_hostname() |
654 |
* |
655 |
* Inputs - pointer to hostname |
656 |
* Output - 1 if valid, 0 if not |
657 |
* Side effects - check hostname for validity |
658 |
* |
659 |
* NOTE: this doesn't allow a hostname to begin with a dot and |
660 |
* will not allow more dots than chars. |
661 |
*/ |
662 |
int |
663 |
valid_hostname(const char *hostname) |
664 |
{ |
665 |
const char *p = hostname; |
666 |
|
667 |
assert(p); |
668 |
|
669 |
if (EmptyString(p) || *p == '.' || *p == ':') |
670 |
return 0; |
671 |
|
672 |
for (; *p; ++p) |
673 |
if (!IsHostChar(*p)) |
674 |
return 0; |
675 |
|
676 |
return p - hostname <= HOSTLEN; |
677 |
} |
678 |
|
679 |
/* valid_username() |
680 |
* |
681 |
* Inputs - pointer to user |
682 |
* Output - 1 if valid, 0 if not |
683 |
* Side effects - check username for validity |
684 |
* |
685 |
* Absolutely always reject any '*' '!' '?' '@' in an user name |
686 |
* reject any odd control characters names. |
687 |
* Allow '.' in username to allow for "first.last" |
688 |
* style of username |
689 |
*/ |
690 |
int |
691 |
valid_username(const char *username, const int local) |
692 |
{ |
693 |
unsigned int dots = 0; |
694 |
const char *p = username; |
695 |
|
696 |
assert(p); |
697 |
|
698 |
if (*p == '~') |
699 |
++p; |
700 |
|
701 |
/* |
702 |
* Reject usernames that don't start with an alphanum |
703 |
* i.e. reject jokers who have '-@somehost' or '.@somehost' |
704 |
* or "-hi-@somehost", "h-----@somehost" would still be accepted. |
705 |
*/ |
706 |
if (!IsAlNum(*p)) |
707 |
return 0; |
708 |
|
709 |
if (local) |
710 |
{ |
711 |
while (*++p) |
712 |
{ |
713 |
if (*p == '.' && ConfigFileEntry.dots_in_ident) |
714 |
{ |
715 |
if (++dots > ConfigFileEntry.dots_in_ident) |
716 |
return 0; |
717 |
if (!IsUserChar(*(p + 1))) |
718 |
return 0; |
719 |
} |
720 |
else if (!IsUserChar(*p)) |
721 |
return 0; |
722 |
} |
723 |
} |
724 |
else |
725 |
{ |
726 |
while (*++p) |
727 |
if (!IsUserChar(*p)) |
728 |
return 0; |
729 |
} |
730 |
|
731 |
return p - username <= USERLEN; |
732 |
} |
733 |
|
734 |
/* clean_nick_name() |
735 |
* |
736 |
* input - nickname |
737 |
* - whether it's a local nick (1) or remote (0) |
738 |
* output - none |
739 |
* side effects - walks through the nickname, returning 0 if erroneous |
740 |
*/ |
741 |
int |
742 |
valid_nickname(const char *nickname, const int local) |
743 |
{ |
744 |
const char *p = nickname; |
745 |
|
746 |
assert(nickname && *nickname); |
747 |
|
748 |
/* |
749 |
* Nicks can't start with a digit or - or be 0 length. |
750 |
*/ |
751 |
if (*p == '-' || (IsDigit(*p) && local) || *p == '\0') |
752 |
return 0; |
753 |
|
754 |
for (; *p; ++p) |
755 |
if (!IsNickChar(*p)) |
756 |
return 0; |
757 |
|
758 |
return p - nickname <= NICKLEN; |
759 |
} |
760 |
|
761 |
/* send_umode() |
762 |
* send the MODE string for user (user) to connection client_p |
763 |
* -avalon |
764 |
* |
765 |
* inputs - client_p |
766 |
* - source_p |
767 |
* - int old |
768 |
* - sendmask mask of modes to send |
769 |
* - suplied umode_buf |
770 |
* output - NONE |
771 |
*/ |
772 |
void |
773 |
send_umode(struct Client *client_p, struct Client *source_p, |
774 |
unsigned int old, char *umode_buf) |
775 |
{ |
776 |
char *m = umode_buf; |
777 |
int what = 0; |
778 |
|
779 |
/* |
780 |
* Build a string in umode_buf to represent the change in the user's |
781 |
* mode between the new (source_p->umodes) and 'old'. |
782 |
*/ |
783 |
for (unsigned int i = 0; i < 128; ++i) |
784 |
{ |
785 |
unsigned int flag = user_modes[i]; |
786 |
|
787 |
if (!flag) |
788 |
continue; |
789 |
|
790 |
if ((flag & old) && !HasUMode(source_p, flag)) |
791 |
{ |
792 |
if (what == MODE_DEL) |
793 |
*m++ = (char)i; |
794 |
else |
795 |
{ |
796 |
what = MODE_DEL; |
797 |
*m++ = '-'; |
798 |
*m++ = (char)i; |
799 |
} |
800 |
} |
801 |
else if (!(flag & old) && HasUMode(source_p, flag)) |
802 |
{ |
803 |
if (what == MODE_ADD) |
804 |
*m++ = (char)i; |
805 |
else |
806 |
{ |
807 |
what = MODE_ADD; |
808 |
*m++ = '+'; |
809 |
*m++ = (char)i; |
810 |
} |
811 |
} |
812 |
} |
813 |
|
814 |
*m = '\0'; |
815 |
|
816 |
if (*umode_buf && client_p) |
817 |
sendto_one(client_p, ":%s!%s@%s MODE %s :%s", |
818 |
source_p->name, source_p->username, |
819 |
source_p->host, source_p->name, umode_buf); |
820 |
} |
821 |
|
822 |
/* send_umode_out() |
823 |
* |
824 |
* inputs - |
825 |
* output - NONE |
826 |
* side effects - Only send ubuf out to servers that know about this client |
827 |
*/ |
828 |
void |
829 |
send_umode_out(struct Client *client_p, struct Client *source_p, |
830 |
unsigned int old) |
831 |
{ |
832 |
char buf[IRCD_BUFSIZE] = ""; |
833 |
|
834 |
send_umode(NULL, source_p, old, buf); |
835 |
|
836 |
if (buf[0]) |
837 |
sendto_server(source_p, NOCAPS, NOCAPS, ":%s MODE %s :%s", |
838 |
source_p->id, source_p->id, buf); |
839 |
|
840 |
if (client_p && MyClient(client_p)) |
841 |
send_umode(client_p, source_p, old, buf); |
842 |
} |
843 |
|
844 |
void |
845 |
user_set_hostmask(struct Client *target_p, const char *hostname, const int what) |
846 |
{ |
847 |
dlink_node *ptr = NULL; |
848 |
|
849 |
if (!strcmp(target_p->host, hostname)) |
850 |
return; |
851 |
|
852 |
switch (what) |
853 |
{ |
854 |
case MODE_ADD: |
855 |
AddUMode(target_p, UMODE_HIDDENHOST); |
856 |
AddFlag(target_p, FLAGS_IP_SPOOFING); |
857 |
break; |
858 |
case MODE_DEL: |
859 |
DelUMode(target_p, UMODE_HIDDENHOST); |
860 |
|
861 |
if (!HasFlag(target_p, FLAGS_AUTH_SPOOF)) |
862 |
DelFlag(target_p, FLAGS_IP_SPOOFING); |
863 |
break; |
864 |
default: return; |
865 |
} |
866 |
|
867 |
if (ConfigFileEntry.cycle_on_host_change) |
868 |
sendto_common_channels_local(target_p, 0, 0, ":%s!%s@%s QUIT :Changing hostname", |
869 |
target_p->name, target_p->username, target_p->host); |
870 |
|
871 |
if (IsUserHostIp(target_p)) |
872 |
delete_user_host(target_p->username, target_p->host, !MyConnect(target_p)); |
873 |
|
874 |
strlcpy(target_p->host, hostname, sizeof(target_p->host)); |
875 |
|
876 |
add_user_host(target_p->username, target_p->host, !MyConnect(target_p)); |
877 |
SetUserHost(target_p); |
878 |
|
879 |
if (MyClient(target_p)) |
880 |
{ |
881 |
sendto_one_numeric(target_p, &me, RPL_NEWHOSTIS, target_p->host); |
882 |
clear_ban_cache_client(target_p); |
883 |
} |
884 |
|
885 |
if (!ConfigFileEntry.cycle_on_host_change) |
886 |
return; |
887 |
|
888 |
DLINK_FOREACH(ptr, target_p->channel.head) |
889 |
{ |
890 |
char modebuf[4], nickbuf[NICKLEN * 3 + 3] = ""; |
891 |
char *p = modebuf; |
892 |
int len = 0; |
893 |
const struct Membership *ms = ptr->data; |
894 |
|
895 |
if (has_member_flags(ms, CHFL_CHANOP)) |
896 |
{ |
897 |
*p++ = 'o'; |
898 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name); |
899 |
} |
900 |
|
901 |
if (has_member_flags(ms, CHFL_HALFOP)) |
902 |
{ |
903 |
*p++ = 'h'; |
904 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name); |
905 |
} |
906 |
|
907 |
if (has_member_flags(ms, CHFL_VOICE)) |
908 |
{ |
909 |
*p++ = 'v'; |
910 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name); |
911 |
} |
912 |
|
913 |
*p = '\0'; |
914 |
|
915 |
sendto_channel_local_butone(target_p, 0, 0, ms->chptr, ":%s!%s@%s JOIN :%s", |
916 |
target_p->name, target_p->username, target_p->host, |
917 |
ms->chptr->chname); |
918 |
if (nickbuf[0]) |
919 |
sendto_channel_local_butone(target_p, 0, 0, ms->chptr, ":%s MODE %s +%s %s", |
920 |
target_p->servptr->name, ms->chptr->chname, |
921 |
modebuf, nickbuf); |
922 |
|
923 |
} |
924 |
|
925 |
if (target_p->away[0]) |
926 |
sendto_common_channels_local(target_p, 0, CAP_AWAY_NOTIFY, |
927 |
":%s!%s@%s AWAY :%s", |
928 |
target_p->name, target_p->username, |
929 |
target_p->host, target_p->away); |
930 |
} |
931 |
|
932 |
/*! \brief Blindly opers up given source_p, using conf info. |
933 |
* All checks on passwords have already been done. |
934 |
* \param source_p Pointer to given client to oper |
935 |
*/ |
936 |
void |
937 |
oper_up(struct Client *source_p) |
938 |
{ |
939 |
const unsigned int old = source_p->umodes; |
940 |
const struct MaskItem *conf = source_p->localClient->confs.head->data; |
941 |
|
942 |
assert(source_p->localClient->confs.head); |
943 |
|
944 |
++Count.oper; |
945 |
SetOper(source_p); |
946 |
|
947 |
if (conf->modes) |
948 |
AddUMode(source_p, conf->modes); |
949 |
else if (ConfigFileEntry.oper_umodes) |
950 |
AddUMode(source_p, ConfigFileEntry.oper_umodes); |
951 |
|
952 |
if (!(old & UMODE_INVISIBLE) && HasUMode(source_p, UMODE_INVISIBLE)) |
953 |
++Count.invisi; |
954 |
if ((old & UMODE_INVISIBLE) && !HasUMode(source_p, UMODE_INVISIBLE)) |
955 |
--Count.invisi; |
956 |
|
957 |
assert(dlinkFind(&oper_list, source_p) == NULL); |
958 |
dlinkAdd(source_p, make_dlink_node(), &oper_list); |
959 |
|
960 |
AddOFlag(source_p, conf->port); |
961 |
|
962 |
if (HasOFlag(source_p, OPER_FLAG_ADMIN)) |
963 |
AddUMode(source_p, UMODE_ADMIN); |
964 |
|
965 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "%s is now an operator", |
966 |
get_oper_name(source_p)); |
967 |
send_umode_out(source_p, source_p, old); |
968 |
sendto_one_numeric(source_p, &me, RPL_YOUREOPER); |
969 |
} |
970 |
|
971 |
static char new_uid[TOTALSIDUID + 1]; /* Allow for \0 */ |
972 |
|
973 |
int |
974 |
valid_sid(const char *sid) |
975 |
{ |
976 |
if (strlen(sid) == IRC_MAXSID) |
977 |
if (IsDigit(*sid)) |
978 |
if (IsAlNum(*(sid + 1)) && IsAlNum(*(sid + 2))) |
979 |
return 1; |
980 |
|
981 |
return 0; |
982 |
} |
983 |
|
984 |
/* |
985 |
* init_uid() |
986 |
* |
987 |
* inputs - NONE |
988 |
* output - NONE |
989 |
* side effects - new_uid is filled in with server id portion (sid) |
990 |
* (first 3 bytes) or defaulted to 'A'. |
991 |
* Rest is filled in with 'A' |
992 |
*/ |
993 |
void |
994 |
init_uid(void) |
995 |
{ |
996 |
memset(new_uid, 0, sizeof(new_uid)); |
997 |
|
998 |
if (!EmptyString(ServerInfo.sid)) |
999 |
strlcpy(new_uid, ServerInfo.sid, sizeof(new_uid)); |
1000 |
|
1001 |
for (unsigned int i = 0; i < IRC_MAXSID; ++i) |
1002 |
if (new_uid[i] == '\0') |
1003 |
new_uid[i] = 'A'; |
1004 |
|
1005 |
/* NOTE: if IRC_MAXUID != 6, this will have to be rewritten */ |
1006 |
memcpy(new_uid + IRC_MAXSID, "AAAAA@", IRC_MAXUID); |
1007 |
} |
1008 |
|
1009 |
/* |
1010 |
* add_one_to_uid |
1011 |
* |
1012 |
* inputs - index number into new_uid |
1013 |
* output - NONE |
1014 |
* side effects - new_uid is incremented by one |
1015 |
* note this is a recursive function |
1016 |
*/ |
1017 |
static void |
1018 |
add_one_to_uid(unsigned int i) |
1019 |
{ |
1020 |
if (i != IRC_MAXSID) /* Not reached server SID portion yet? */ |
1021 |
{ |
1022 |
if (new_uid[i] == 'Z') |
1023 |
new_uid[i] = '0'; |
1024 |
else if (new_uid[i] == '9') |
1025 |
{ |
1026 |
new_uid[i] = 'A'; |
1027 |
add_one_to_uid(i - 1); |
1028 |
} |
1029 |
else |
1030 |
++new_uid[i]; |
1031 |
} |
1032 |
else |
1033 |
{ |
1034 |
/* NOTE: if IRC_MAXUID != 6, this will have to be rewritten */ |
1035 |
if (new_uid[i] == 'Z') |
1036 |
memcpy(new_uid + IRC_MAXSID, "AAAAAA", IRC_MAXUID); |
1037 |
else |
1038 |
++new_uid[i]; |
1039 |
} |
1040 |
} |
1041 |
|
1042 |
/* |
1043 |
* uid_get |
1044 |
* |
1045 |
* inputs - struct Client * |
1046 |
* output - new UID is returned to caller |
1047 |
* side effects - new_uid is incremented by one. |
1048 |
*/ |
1049 |
static const char * |
1050 |
uid_get(void) |
1051 |
{ |
1052 |
add_one_to_uid(TOTALSIDUID - 1); /* Index from 0 */ |
1053 |
return new_uid; |
1054 |
} |
1055 |
|
1056 |
/* |
1057 |
* init_isupport() |
1058 |
* |
1059 |
* input - NONE |
1060 |
* output - NONE |
1061 |
* side effects - Must be called before isupport is enabled |
1062 |
*/ |
1063 |
void |
1064 |
init_isupport(void) |
1065 |
{ |
1066 |
add_isupport("CALLERID", NULL, -1); |
1067 |
add_isupport("CASEMAPPING", "rfc1459", -1); |
1068 |
add_isupport("DEAF", "D", -1); |
1069 |
add_isupport("KICKLEN", NULL, KICKLEN); |
1070 |
add_isupport("MODES", NULL, MAXMODEPARAMS); |
1071 |
add_isupport("PREFIX", "(ohv)@%+", -1); |
1072 |
add_isupport("STATUSMSG", "@%+", -1); |
1073 |
add_isupport("EXCEPTS", "e", -1); |
1074 |
add_isupport("INVEX", "I", -1); |
1075 |
} |
1076 |
|
1077 |
/* |
1078 |
* add_isupport() |
1079 |
* |
1080 |
* input - name of supported function |
1081 |
* - options if any |
1082 |
* - number if any |
1083 |
* output - NONE |
1084 |
* side effects - Each supported item must call this when activated |
1085 |
*/ |
1086 |
void |
1087 |
add_isupport(const char *name, const char *options, int n) |
1088 |
{ |
1089 |
dlink_node *ptr; |
1090 |
struct Isupport *support = NULL; |
1091 |
|
1092 |
DLINK_FOREACH(ptr, support_list.head) |
1093 |
{ |
1094 |
support = ptr->data; |
1095 |
if (irccmp(support->name, name) == 0) |
1096 |
{ |
1097 |
MyFree(support->name); |
1098 |
MyFree(support->options); |
1099 |
break; |
1100 |
} |
1101 |
} |
1102 |
|
1103 |
if (ptr == NULL) |
1104 |
{ |
1105 |
support = MyCalloc(sizeof(*support)); |
1106 |
dlinkAddTail(support, &support->node, &support_list); |
1107 |
} |
1108 |
|
1109 |
support->name = xstrdup(name); |
1110 |
if (options) |
1111 |
support->options = xstrdup(options); |
1112 |
support->number = n; |
1113 |
|
1114 |
rebuild_isupport_message_line(); |
1115 |
} |
1116 |
|
1117 |
/* |
1118 |
* delete_isupport() |
1119 |
* |
1120 |
* input - name of supported function |
1121 |
* output - NONE |
1122 |
* side effects - Each supported item must call this when deactivated |
1123 |
*/ |
1124 |
void |
1125 |
delete_isupport(const char *name) |
1126 |
{ |
1127 |
dlink_node *ptr; |
1128 |
struct Isupport *support; |
1129 |
|
1130 |
DLINK_FOREACH(ptr, support_list.head) |
1131 |
{ |
1132 |
support = ptr->data; |
1133 |
if (irccmp(support->name, name) == 0) |
1134 |
{ |
1135 |
dlinkDelete(ptr, &support_list); |
1136 |
MyFree(support->name); |
1137 |
MyFree(support->options); |
1138 |
MyFree(support); |
1139 |
break; |
1140 |
} |
1141 |
} |
1142 |
|
1143 |
rebuild_isupport_message_line(); |
1144 |
} |
1145 |
|
1146 |
/* |
1147 |
* rebuild_isupport_message_line |
1148 |
* |
1149 |
* input - NONE |
1150 |
* output - NONE |
1151 |
* side effects - Destroy the isupport MessageFile lines, and rebuild. |
1152 |
*/ |
1153 |
void |
1154 |
rebuild_isupport_message_line(void) |
1155 |
{ |
1156 |
char isupportbuffer[IRCD_BUFSIZE]; |
1157 |
char *p = isupportbuffer; |
1158 |
dlink_node *ptr = NULL, *ptr_next = NULL; |
1159 |
int n = 0; |
1160 |
int tokens = 0; |
1161 |
size_t len = 0; |
1162 |
size_t reserve = strlen(me.name) + HOSTLEN + strlen(numeric_form(RPL_ISUPPORT)); |
1163 |
|
1164 |
DLINK_FOREACH_SAFE(ptr, ptr_next, support_list_lines.head) |
1165 |
{ |
1166 |
dlinkDelete(ptr, &support_list_lines); |
1167 |
MyFree(ptr->data); |
1168 |
free_dlink_node(ptr); |
1169 |
} |
1170 |
|
1171 |
DLINK_FOREACH(ptr, support_list.head) |
1172 |
{ |
1173 |
struct Isupport *support = ptr->data; |
1174 |
|
1175 |
p += (n = sprintf(p, "%s", support->name)); |
1176 |
len += n; |
1177 |
|
1178 |
if (support->options) |
1179 |
{ |
1180 |
p += (n = sprintf(p, "=%s", support->options)); |
1181 |
len += n; |
1182 |
} |
1183 |
|
1184 |
if (support->number > 0) |
1185 |
{ |
1186 |
p += (n = sprintf(p, "=%d", support->number)); |
1187 |
len += n; |
1188 |
} |
1189 |
|
1190 |
*p++ = ' '; |
1191 |
len++; |
1192 |
*p = '\0'; |
1193 |
|
1194 |
if (++tokens == (MAXPARA-2) || len >= (sizeof(isupportbuffer)-reserve)) |
1195 |
{ /* arbritrary for now */ |
1196 |
if (*--p == ' ') |
1197 |
*p = '\0'; |
1198 |
|
1199 |
dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &support_list_lines); |
1200 |
p = isupportbuffer; |
1201 |
len = 0; |
1202 |
n = tokens = 0; |
1203 |
} |
1204 |
} |
1205 |
|
1206 |
if (len) |
1207 |
{ |
1208 |
if (*--p == ' ') |
1209 |
*p = '\0'; |
1210 |
dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &support_list_lines); |
1211 |
} |
1212 |
} |