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construct/src/s_user.c
jilles 14e23b0e1e [svn] Fix some cases where the size argument to strlcpy() 
for usernames and hostnames is 1 too small.
2007-03-04 17:14:46 -08:00

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/*
* ircd-ratbox: A slightly useful ircd.
* s_user.c: User related functions.
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox development team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* $Id: s_user.c 3227 2007-03-05 01:14:46Z jilles $
*/
#include "stdinc.h"
#include "tools.h"
#include "s_user.h"
#include "channel.h"
#include "class.h"
#include "client.h"
#include "common.h"
#include "hash.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "ircd.h"
#include "listener.h"
#include "msg.h"
#include "numeric.h"
#include "commio.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "s_log.h"
#include "s_serv.h"
#include "s_stats.h"
#include "scache.h"
#include "send.h"
#include "supported.h"
#include "whowas.h"
#include "memory.h"
#include "packet.h"
#include "reject.h"
#include "cache.h"
#include "hook.h"
#include "monitor.h"
#include "snomask.h"
#include "blacklist.h"
#include "substitution.h"
static void report_and_set_user_flags(struct Client *, struct ConfItem *);
void user_welcome(struct Client *source_p);
extern char *crypt();
char umodebuf[128];
static int orphaned_umodes = 0;
int user_modes[256] = {
/* 0x00 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x0F */
/* 0x10 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x1F */
/* 0x20 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x2F */
/* 0x30 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x3F */
0, /* @ */
0, /* A */
0, /* B */
0, /* C */
UMODE_DEAF, /* D */
0, /* E */
0, /* F */
0, /* G */
0, /* H */
0, /* I */
0, /* J */
0, /* K */
0, /* L */
0, /* M */
0, /* N */
0, /* O */
0, /* P */
UMODE_NOFORWARD, /* Q */
UMODE_REGONLYMSG, /* R */
UMODE_SERVICE, /* S */
0, /* T */
0, /* U */
0, /* V */
0, /* W */
0, /* X */
0, /* Y */
0, /* Z */
/* 0x5B */ 0, 0, 0, 0, 0, 0, /* 0x60 */
UMODE_ADMIN, /* a */
0, /* b */
0, /* c */
0, /* d */
0, /* e */
0, /* f */
UMODE_CALLERID, /* g */
0, /* h */
UMODE_INVISIBLE, /* i */
0, /* j */
0, /* k */
UMODE_LOCOPS, /* l */
0, /* m */
0, /* n */
UMODE_OPER, /* o */
0, /* p */
0, /* q */
0, /* r */
UMODE_SERVNOTICE, /* s */
0, /* t */
0, /* u */
0, /* v */
UMODE_WALLOP, /* w */
0, /* x */
0, /* y */
UMODE_OPERWALL, /* z */
/* 0x7B */ 0, 0, 0, 0, 0, /* 0x7F */
/* 0x80 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x9F */
/* 0x90 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x9F */
/* 0xA0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xAF */
/* 0xB0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xBF */
/* 0xC0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xCF */
/* 0xD0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xDF */
/* 0xE0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xEF */
/* 0xF0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* 0xFF */
};
/* *INDENT-ON* */
/*
* show_lusers -
*
* inputs - pointer to client
* output -
* side effects - display to client user counts etc.
*/
int
show_lusers(struct Client *source_p)
{
sendto_one_numeric(source_p, RPL_LUSERCLIENT, form_str(RPL_LUSERCLIENT),
(Count.total - Count.invisi),
Count.invisi, dlink_list_length(&global_serv_list));
if(dlink_list_length(&oper_list) > 0)
sendto_one_numeric(source_p, RPL_LUSEROP,
form_str(RPL_LUSEROP), dlink_list_length(&oper_list));
if(dlink_list_length(&unknown_list) > 0)
sendto_one_numeric(source_p, RPL_LUSERUNKNOWN,
form_str(RPL_LUSERUNKNOWN),
dlink_list_length(&unknown_list));
if(dlink_list_length(&global_channel_list) > 0)
sendto_one_numeric(source_p, RPL_LUSERCHANNELS,
form_str(RPL_LUSERCHANNELS),
dlink_list_length(&global_channel_list));
sendto_one_numeric(source_p, RPL_LUSERME, form_str(RPL_LUSERME),
dlink_list_length(&lclient_list),
dlink_list_length(&serv_list));
sendto_one_numeric(source_p, RPL_LOCALUSERS,
form_str(RPL_LOCALUSERS),
dlink_list_length(&lclient_list),
Count.max_loc,
dlink_list_length(&lclient_list),
Count.max_loc);
sendto_one_numeric(source_p, RPL_GLOBALUSERS, form_str(RPL_GLOBALUSERS),
Count.total, Count.max_tot,
Count.total, Count.max_tot);
sendto_one_numeric(source_p, RPL_STATSCONN,
form_str(RPL_STATSCONN),
MaxConnectionCount, MaxClientCount,
Count.totalrestartcount);
if(dlink_list_length(&lclient_list) > (unsigned long)MaxClientCount)
MaxClientCount = dlink_list_length(&lclient_list);
if((dlink_list_length(&lclient_list) + dlink_list_length(&serv_list)) >
(unsigned long)MaxConnectionCount)
MaxConnectionCount = dlink_list_length(&lclient_list) +
dlink_list_length(&serv_list);
return 0;
}
/*
** register_local_user
** This function is called when both NICK and USER messages
** have been accepted for the client, in whatever order. Only
** after this, is the USER message propagated.
**
** NICK's must be propagated at once when received, although
** it would be better to delay them too until full info is
** available. Doing it is not so simple though, would have
** to implement the following:
**
** (actually it has been implemented already for a while) -orabidoo
**
** 1) user telnets in and gives only "NICK foobar" and waits
** 2) another user far away logs in normally with the nick
** "foobar" (quite legal, as this server didn't propagate
** it).
** 3) now this server gets nick "foobar" from outside, but
** has alread the same defined locally. Current server
** would just issue "KILL foobar" to clean out dups. But,
** this is not fair. It should actually request another
** nick from local user or kill him/her...
*/
int
register_local_user(struct Client *client_p, struct Client *source_p, const char *username)
{
struct ConfItem *aconf;
struct User *user = source_p->user;
char tmpstr2[IRCD_BUFSIZE];
char ipaddr[HOSTIPLEN];
char myusername[USERLEN+1];
int status;
s_assert(NULL != source_p);
s_assert(MyConnect(source_p));
s_assert(source_p->username != username);
if(source_p == NULL)
return -1;
if(IsAnyDead(source_p))
return -1;
if(ConfigFileEntry.ping_cookie)
{
if(!(source_p->flags & FLAGS_PINGSENT) && source_p->localClient->random_ping == 0)
{
source_p->localClient->random_ping = (unsigned long) (rand() * rand()) << 1;
sendto_one(source_p, "PING :%08lX",
(unsigned long) source_p->localClient->random_ping);
source_p->flags |= FLAGS_PINGSENT;
return -1;
}
if(!(source_p->flags2 & FLAGS2_PING_COOKIE))
{
return -1;
}
}
/* hasnt finished client cap negotiation */
if(source_p->flags2 & FLAGS2_CLICAP)
return -1;
/* still has DNSbls to validate against */
if(dlink_list_length(&source_p->preClient->dnsbl_queries) > 0)
return -1;
client_p->localClient->last = CurrentTime;
/* Straight up the maximum rate of flooding... */
source_p->localClient->allow_read = MAX_FLOOD_BURST;
/* XXX - fixme. we shouldnt have to build a users buffer twice.. */
if(!IsGotId(source_p) && (strchr(username, '[') != NULL))
{
const char *p;
int i = 0;
p = username;
while(*p && i < USERLEN)
{
if(*p != '[')
myusername[i++] = *p;
p++;
}
myusername[i] = '\0';
username = myusername;
}
if((status = check_client(client_p, source_p, username)) < 0)
return (CLIENT_EXITED);
/* Apply nick override */
if(*source_p->preClient->spoofnick)
{
del_from_client_hash(source_p->name, source_p);
strlcpy(source_p->name, source_p->preClient->spoofnick, NICKLEN + 1);
add_to_client_hash(source_p->name, source_p);
comm_note(source_p->localClient->fd, "Nick: %s", source_p->name);
}
if(!valid_hostname(source_p->host))
{
sendto_one_notice(source_p, ":*** Notice -- You have an illegal character in your hostname");
strlcpy(source_p->host, source_p->sockhost, sizeof(source_p->host));
#ifdef IPV6
if(ConfigFileEntry.dot_in_ip6_addr == 1)
strlcat(source_p->host, ".", sizeof(source_p->host));
#endif
}
aconf = source_p->localClient->att_conf;
if(aconf == NULL)
{
exit_client(client_p, source_p, &me, "*** Not Authorised");
return (CLIENT_EXITED);
}
if(!IsGotId(source_p))
{
const char *p;
int i = 0;
if(IsNeedIdentd(aconf))
{
ServerStats->is_ref++;
sendto_one_notice(source_p, ":*** Notice -- You need to install identd to use this server");
exit_client(client_p, source_p, &me, "Install identd");
return (CLIENT_EXITED);
}
/* dont replace username if its supposed to be spoofed --fl */
if(!IsConfDoSpoofIp(aconf) || !strchr(aconf->name, '@'))
{
p = username;
if(!IsNoTilde(aconf))
source_p->username[i++] = '~';
while (*p && i < USERLEN)
{
if(*p != '[')
source_p->username[i++] = *p;
p++;
}
source_p->username[i] = '\0';
}
}
if(IsNeedSasl(aconf) && !*user->suser)
{
ServerStats->is_ref++;
sendto_one_notice(source_p, ":*** Notice -- You need to identify via SASL to use this server");
exit_client(client_p, source_p, &me, "SASL access only");
return (CLIENT_EXITED);
}
/* password check */
if(!EmptyString(aconf->passwd))
{
const char *encr;
if(EmptyString(source_p->localClient->passwd))
encr = "";
else if(IsConfEncrypted(aconf))
encr = crypt(source_p->localClient->passwd, aconf->passwd);
else
encr = source_p->localClient->passwd;
if(strcmp(encr, aconf->passwd))
{
ServerStats->is_ref++;
sendto_one(source_p, form_str(ERR_PASSWDMISMATCH), me.name, source_p->name);
exit_client(client_p, source_p, &me, "Bad Password");
return (CLIENT_EXITED);
}
/* clear password only if used now, otherwise send it
* to services -- jilles */
if(source_p->localClient->passwd)
{
memset(source_p->localClient->passwd, 0, strlen(source_p->localClient->passwd));
MyFree(source_p->localClient->passwd);
source_p->localClient->passwd = NULL;
}
}
/* report if user has &^>= etc. and set flags as needed in source_p */
report_and_set_user_flags(source_p, aconf);
/* Limit clients */
/*
* We want to be able to have servers and F-line clients
* connect, so save room for "buffer" connections.
* Smaller servers may want to decrease this, and it should
* probably be just a percentage of the MAXCLIENTS...
* -Taner
*/
/* Except "F:" clients */
if(((dlink_list_length(&lclient_list) + 1) >=
((unsigned long)GlobalSetOptions.maxclients + MAX_BUFFER) ||
(dlink_list_length(&lclient_list) + 1) >=
((unsigned long)GlobalSetOptions.maxclients - 5)) && !(IsExemptLimits(source_p)))
{
sendto_realops_snomask(SNO_FULL, L_ALL,
"Too many clients, rejecting %s[%s].", source_p->name, source_p->host);
ServerStats->is_ref++;
exit_client(client_p, source_p, &me, "Sorry, server is full - try later");
return (CLIENT_EXITED);
}
/* valid user name check */
if(!valid_username(source_p->username))
{
sendto_realops_snomask(SNO_REJ, L_ALL,
"Invalid username: %s (%s@%s)",
source_p->name, source_p->username, source_p->host);
ServerStats->is_ref++;
ircsprintf(tmpstr2, "Invalid username [%s]", source_p->username);
exit_client(client_p, source_p, &me, tmpstr2);
return (CLIENT_EXITED);
}
/* end of valid user name check */
/* kline exemption extends to xline too */
if(!IsExemptKline(source_p) &&
find_xline(source_p->info, 1) != NULL)
{
ServerStats->is_ref++;
add_reject(source_p);
exit_client(client_p, source_p, &me, "Bad user info");
return CLIENT_EXITED;
}
/* dnsbl check */
if (source_p->preClient->dnsbl_listed != NULL)
{
if (IsExemptKline(source_p) || IsConfExemptDNSBL(aconf))
sendto_one_notice(source_p, ":*** Your IP address %s is listed in %s, but you are exempt",
source_p->sockhost, source_p->preClient->dnsbl_listed->host);
else
{
dlink_list varlist;
substitution_append_var(&varlist, "nick", source_p->name);
substitution_append_var(&varlist, "ip", source_p->sockhost);
substitution_append_var(&varlist, "host", source_p->host);
substitution_append_var(&varlist, "dnsbl-host", source_p->preClient->dnsbl_listed->host);
substitution_append_var(&varlist, "network-name", ServerInfo.network_name);
ServerStats->is_ref++;
sendto_one(source_p, form_str(ERR_YOUREBANNEDCREEP),
me.name, source_p->name,
substitution_parse(source_p->preClient->dnsbl_listed->reject_reason, &varlist));
substitution_free(&varlist);
sendto_one_notice(source_p, ":*** Your IP address %s is listed in %s",
source_p->sockhost, source_p->preClient->dnsbl_listed->host);
source_p->preClient->dnsbl_listed->hits++;
add_reject(source_p);
exit_client(client_p, source_p, &me, "*** Banned (DNS blacklist)");
return CLIENT_EXITED;
}
}
/* Store original hostname -- jilles */
strlcpy(source_p->orighost, source_p->host, HOSTLEN + 1);
/* Spoof user@host */
if(*source_p->preClient->spoofuser)
strlcpy(source_p->username, source_p->preClient->spoofuser, USERLEN + 1);
if(*source_p->preClient->spoofhost)
{
strlcpy(source_p->host, source_p->preClient->spoofhost, HOSTLEN + 1);
if (irccmp(source_p->host, source_p->orighost))
SetDynSpoof(source_p);
}
if(IsAnyDead(client_p))
return CLIENT_EXITED;
inetntop_sock((struct sockaddr *)&source_p->localClient->ip, ipaddr, sizeof(ipaddr));
sendto_realops_snomask(SNO_CCONN, L_ALL,
"Client connecting: %s (%s@%s) [%s] {%s} [%s]",
source_p->name, source_p->username, source_p->orighost,
show_ip(NULL, source_p) ? ipaddr : "255.255.255.255",
get_client_class(source_p), source_p->info);
sendto_realops_snomask(SNO_CCONNEXT, L_ALL,
"CLICONN %s %s %s %s %s %s 0 %s",
source_p->name, source_p->username, source_p->orighost,
show_ip(NULL, source_p) ? ipaddr : "255.255.255.255",
get_client_class(source_p),
/* mirc can sometimes send ips here */
show_ip(NULL, source_p) ? source_p->localClient->fullcaps : "<hidden> <hidden>",
source_p->info);
/* If they have died in send_* don't do anything. */
if(IsAnyDead(source_p))
return CLIENT_EXITED;
add_to_hostname_hash(source_p->orighost, source_p);
/* Allocate a UID if it was not previously allocated.
* If this already occured, it was probably during SASL auth...
*/
if(!*source_p->id)
{
strcpy(source_p->id, generate_uid());
add_to_id_hash(source_p->id, source_p);
}
source_p->umodes |= ConfigFileEntry.default_umodes & ~ConfigFileEntry.oper_only_umodes & ~orphaned_umodes;
if (source_p->umodes & UMODE_INVISIBLE)
Count.invisi++;
s_assert(!IsClient(source_p));
dlinkMoveNode(&source_p->localClient->tnode, &unknown_list, &lclient_list);
SetClient(source_p);
/* XXX source_p->servptr is &me, since local client */
source_p->servptr = find_server(NULL, user->server);
dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->users);
/* Increment our total user count here */
if(++Count.total > Count.max_tot)
Count.max_tot = Count.total;
source_p->localClient->allow_read = MAX_FLOOD_BURST;
Count.totalrestartcount++;
s_assert(source_p->localClient != NULL);
if(dlink_list_length(&lclient_list) > (unsigned long)Count.max_loc)
{
Count.max_loc = dlink_list_length(&lclient_list);
if(!(Count.max_loc % 10))
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"New Max Local Clients: %d", Count.max_loc);
}
/* they get a reduced limit */
if(find_tgchange(source_p->sockhost))
USED_TARGETS(source_p) = 6;
call_hook(h_new_local_user, source_p);
monitor_signon(source_p);
user_welcome(source_p);
free_pre_client(source_p);
return (introduce_client(client_p, source_p, user, source_p->name, 1));
}
/*
* introduce_clients
*
* inputs -
* output -
* side effects - This common function introduces a client to the rest
* of the net, either from a local client connect or
* from a remote connect.
*/
int
introduce_client(struct Client *client_p, struct Client *source_p, struct User *user, const char *nick, int use_euid)
{
static char ubuf[12];
struct Client *identifyservice_p;
char *p;
hook_data_umode_changed hdata;
hook_data_client hdata2;
if(MyClient(source_p))
send_umode(source_p, source_p, 0, 0, ubuf);
else
send_umode(NULL, source_p, 0, 0, ubuf);
if(!*ubuf)
{
ubuf[0] = '+';
ubuf[1] = '\0';
}
/* if it has an ID, introduce it with its id to TS6 servers,
* otherwise introduce it normally to all.
*/
if(has_id(source_p))
{
char sockhost[HOSTLEN];
if(source_p->sockhost[0] == ':')
{
sockhost[0] = '0';
sockhost[1] = '\0';
strlcat(sockhost, source_p->sockhost, sizeof(sockhost));
} else
strcpy(sockhost, source_p->sockhost);
if (use_euid)
sendto_server(client_p, NULL, CAP_EUID | CAP_TS6, NOCAPS,
":%s EUID %s %d %ld %s %s %s %s %s %s %s :%s",
source_p->servptr->id, nick,
source_p->hopcount + 1,
(long) source_p->tsinfo, ubuf,
source_p->username, source_p->host,
IsIPSpoof(source_p) ? "0" : sockhost,
source_p->id,
IsDynSpoof(source_p) ? source_p->orighost : "*",
EmptyString(source_p->user->suser) ? "*" : source_p->user->suser,
source_p->info);
sendto_server(client_p, NULL, CAP_TS6, use_euid ? CAP_EUID : NOCAPS,
":%s UID %s %d %ld %s %s %s %s %s :%s",
source_p->servptr->id, nick,
source_p->hopcount + 1,
(long) source_p->tsinfo, ubuf,
source_p->username, source_p->host,
IsIPSpoof(source_p) ? "0" : sockhost,
source_p->id, source_p->info);
sendto_server(client_p, NULL, NOCAPS, CAP_TS6,
"NICK %s %d %ld %s %s %s %s :%s",
nick, source_p->hopcount + 1,
(long) source_p->tsinfo,
ubuf, source_p->username, source_p->host,
user->server, source_p->info);
}
else
sendto_server(client_p, NULL, NOCAPS, NOCAPS,
"NICK %s %d %ld %s %s %s %s :%s",
nick, source_p->hopcount + 1,
(long) source_p->tsinfo,
ubuf, source_p->username, source_p->host,
user->server, source_p->info);
if (IsDynSpoof(source_p))
{
sendto_server(client_p, NULL, CAP_TS6, use_euid ? CAP_EUID : NOCAPS, ":%s ENCAP * REALHOST %s",
use_id(source_p), source_p->orighost);
sendto_server(client_p, NULL, NOCAPS, CAP_TS6, ":%s ENCAP * REALHOST %s",
source_p->name, source_p->orighost);
}
if (!EmptyString(source_p->user->suser))
{
sendto_server(client_p, NULL, CAP_TS6, use_euid ? CAP_EUID : NOCAPS, ":%s ENCAP * LOGIN %s",
use_id(source_p), source_p->user->suser);
sendto_server(client_p, NULL, NOCAPS, CAP_TS6, ":%s ENCAP * LOGIN %s",
source_p->name, source_p->user->suser);
}
if(MyConnect(source_p) && source_p->localClient->passwd)
{
if (ConfigFileEntry.identifyservice[0] != '\0' &&
ConfigFileEntry.identifycommand[0] != '\0')
{
/* use user@server */
p = strchr(ConfigFileEntry.identifyservice, '@');
if (p != NULL)
identifyservice_p = find_named_client(p + 1);
else
identifyservice_p = NULL;
if (identifyservice_p != NULL)
sendto_one(identifyservice_p, ":%s PRIVMSG %s :%s %s",
get_id(source_p, identifyservice_p),
ConfigFileEntry.identifyservice,
ConfigFileEntry.identifycommand,
source_p->localClient->passwd);
}
memset(source_p->localClient->passwd, 0, strlen(source_p->localClient->passwd));
MyFree(source_p->localClient->passwd);
source_p->localClient->passwd = NULL;
}
/* let modules providing usermodes know that we've got a new user,
* why is this here? -- well, some modules need to be able to send out new
* information about a client, so this was the best place to do it
* --nenolod
*/
hdata.client = source_p;
hdata.oldumodes = 0;
hdata.oldsnomask = 0;
call_hook(h_umode_changed, &hdata);
/* On the other hand, some modules need to know when a client is
* being introduced, period.
* --gxti
*/
hdata2.client = client_p;
hdata2.target = source_p;
call_hook(h_introduce_client, &hdata2);
return 0;
}
/*
* valid_hostname - check hostname for validity
*
* Inputs - pointer to user
* Output - YES if valid, NO if not
* Side effects - NONE
*
* NOTE: this doesn't allow a hostname to begin with a dot and
* will not allow more dots than chars.
*/
int
valid_hostname(const char *hostname)
{
const char *p = hostname;
int found_sep = 0;
s_assert(NULL != p);
if(hostname == NULL)
return NO;
if('.' == *p || ':' == *p)
return NO;
while (*p)
{
if(!IsHostChar(*p))
return NO;
if(*p == '.' || *p == ':')
found_sep++;
p++;
}
if(found_sep == 0)
return(NO);
return (YES);
}
/*
* valid_username - check username for validity
*
* Inputs - pointer to user
* Output - YES if valid, NO if not
* Side effects - NONE
*
* Absolutely always reject any '*' '!' '?' '@' in an user name
* reject any odd control characters names.
* Allow '.' in username to allow for "first.last"
* style of username
*/
int
valid_username(const char *username)
{
int dots = 0;
const char *p = username;
s_assert(NULL != p);
if(username == NULL)
return NO;
if('~' == *p)
++p;
/* reject usernames that don't start with an alphanum
* i.e. reject jokers who have '-@somehost' or '.@somehost'
* or "-hi-@somehost", "h-----@somehost" would still be accepted.
*/
if(!IsAlNum(*p))
return NO;
while (*++p)
{
if((*p == '.') && ConfigFileEntry.dots_in_ident)
{
dots++;
if(dots > ConfigFileEntry.dots_in_ident)
return NO;
if(!IsUserChar(p[1]))
return NO;
}
else if(!IsUserChar(*p))
return NO;
}
return YES;
}
/* report_and_set_user_flags
*
* Inputs - pointer to source_p
* - pointer to aconf for this user
* Output - NONE
* Side effects -
* Report to user any special flags they are getting, and set them.
*/
static void
report_and_set_user_flags(struct Client *source_p, struct ConfItem *aconf)
{
/* If this user is being spoofed, tell them so */
if(IsConfDoSpoofIp(aconf))
{
sendto_one_notice(source_p, ":*** Spoofing your IP. congrats.");
}
/* If this user is in the exception class, Set it "E lined" */
if(IsConfExemptKline(aconf))
{
SetExemptKline(source_p);
sendto_one_notice(source_p, ":*** You are exempt from K/D/G/X lines. congrats.");
}
if(IsConfExemptGline(aconf))
{
SetExemptGline(source_p);
/* dont send both a kline and gline exempt notice */
if(!IsConfExemptKline(aconf))
sendto_one_notice(source_p, ":*** You are exempt from G lines.");
}
if(IsConfExemptDNSBL(aconf))
/* kline exempt implies this, don't send both */
if(!IsConfExemptKline(aconf))
sendto_one_notice(source_p, ":*** You are exempt from DNS blacklists.");
/* If this user is exempt from user limits set it F lined" */
if(IsConfExemptLimits(aconf))
{
SetExemptLimits(source_p);
sendto_one_notice(source_p, "*** You are exempt from user limits. congrats.");
}
/* If this user is exempt from idle time outs */
if(IsConfIdlelined(aconf))
{
SetIdlelined(source_p);
sendto_one_notice(source_p, ":*** You are exempt from idle limits. congrats.");
}
if(IsConfExemptFlood(aconf))
{
SetExemptFlood(source_p);
sendto_one_notice(source_p, ":*** You are exempt from flood limits.");
}
if(IsConfExemptSpambot(aconf))
{
SetExemptSpambot(source_p);
sendto_one_notice(source_p, ":*** You are exempt from spambot checks.");
}
if(IsConfExemptJupe(aconf))
{
SetExemptJupe(source_p);
sendto_one_notice(source_p, ":*** You are exempt from juped channel warnings.");
}
if(IsConfExemptResv(aconf))
{
SetExemptResv(source_p);
sendto_one_notice(source_p, ":*** You are exempt from resvs.");
}
if(IsConfExemptShide(aconf))
{
SetExemptShide(source_p);
sendto_one_notice(source_p, ":*** You are exempt from serverhiding.");
}
}
/*
* user_mode - set get current users mode
*
* m_umode() added 15/10/91 By Darren Reed.
* parv[0] - sender
* parv[1] - username to change mode for
* parv[2] - modes to change
*/
int
user_mode(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
int flag;
int i;
char *m;
const char *pm;
struct Client *target_p;
int what, setflags;
int badflag = NO; /* Only send one bad flag notice */
int showsnomask = NO;
unsigned int setsnomask;
char buf[BUFSIZE];
hook_data_umode_changed hdata;
what = MODE_ADD;
if(parc < 2)
{
sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS), me.name, source_p->name, "MODE");
return 0;
}
if((target_p = MyClient(source_p) ? find_named_person(parv[1]) : find_person(parv[1])) == NULL)
{
if(MyConnect(source_p))
sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
form_str(ERR_NOSUCHCHANNEL), parv[1]);
return 0;
}
/* Dont know why these were commented out..
* put them back using new sendto() funcs
*/
if(IsServer(source_p))
{
sendto_realops_snomask(SNO_GENERAL, L_ADMIN,
"*** Mode for User %s from %s", parv[1], source_p->name);
return 0;
}
if(source_p != target_p || target_p->from != source_p->from)
{
sendto_one(source_p, form_str(ERR_USERSDONTMATCH), me.name, source_p->name);
return 0;
}
if(parc < 3)
{
m = buf;
*m++ = '+';
for (i = 0; i < 128; i++) /* >= 127 is extended ascii */
if (source_p->umodes & user_modes[i])
*m++ = (char) i;
*m = '\0';
sendto_one(source_p, form_str(RPL_UMODEIS), me.name, source_p->name, buf);
if (source_p->snomask != 0)
sendto_one(source_p, form_str(RPL_SNOMASK), me.name, source_p->name,
construct_snobuf(source_p->snomask));
return 0;
}
/* find flags already set for user */
setflags = source_p->umodes;
setsnomask = source_p->snomask;
/*
* parse mode change string(s)
*/
for (pm = parv[2]; *pm; pm++)
switch (*pm)
{
case '+':
what = MODE_ADD;
break;
case '-':
what = MODE_DEL;
break;
case 'o':
if(what == MODE_ADD)
{
if(IsServer(client_p) && !IsOper(source_p))
{
++Count.oper;
SetOper(source_p);
dlinkAddAlloc(source_p, &oper_list);
}
}
else
{
/* Only decrement the oper counts if an oper to begin with
* found by Pat Szuta, Perly , perly@xnet.com
*/
if(!IsOper(source_p))
break;
ClearOper(source_p);
Count.oper--;
if(MyConnect(source_p))
{
source_p->umodes &= ~ConfigFileEntry.oper_only_umodes;
if (!(source_p->umodes & UMODE_SERVNOTICE) && source_p->snomask != 0)
{
source_p->snomask = 0;
showsnomask = YES;
}
source_p->flags2 &= ~OPER_FLAGS;
MyFree(source_p->localClient->opername);
source_p->localClient->opername = NULL;
dlinkFindDestroy(source_p, &local_oper_list);
}
dlinkFindDestroy(source_p, &oper_list);
}
break;
/* we may not get these,
* but they shouldnt be in default
*/
/* can only be set on burst */
case 'S':
case ' ':
case '\n':
case '\r':
case '\t':
break;
case 's':
if (MyConnect(source_p))
{
if(!IsOper(source_p)
&& (ConfigFileEntry.oper_only_umodes & UMODE_SERVNOTICE))
{
if (what == MODE_ADD || source_p->umodes & UMODE_SERVNOTICE)
badflag = YES;
continue;
}
showsnomask = YES;
if(what == MODE_ADD)
{
if (parc > 3)
source_p->snomask = parse_snobuf_to_mask(source_p->snomask, parv[3]);
else
source_p->snomask |= SNO_GENERAL;
}
else
source_p->snomask = 0;
if (source_p->snomask != 0)
source_p->umodes |= UMODE_SERVNOTICE;
else
source_p->umodes &= ~UMODE_SERVNOTICE;
break;
}
/* FALLTHROUGH */
default:
if (MyConnect(source_p) && *pm == 'Q' && !ConfigChannel.use_forward) {
badflag = YES;
break;
}
if((flag = user_modes[(unsigned char) *pm]))
{
if(MyConnect(source_p)
&& ((!IsOper(source_p)
&& (ConfigFileEntry.oper_only_umodes & flag))
|| (orphaned_umodes & flag)))
{
if (what == MODE_ADD || source_p->umodes & flag)
badflag = YES;
}
else
{
if(what == MODE_ADD)
source_p->umodes |= flag;
else
source_p->umodes &= ~flag;
}
}
else
{
if(MyConnect(source_p))
badflag = YES;
}
break;
}
if(badflag)
sendto_one(source_p, form_str(ERR_UMODEUNKNOWNFLAG), me.name, source_p->name);
if(MyClient(source_p) && (source_p->snomask & SNO_NCHANGE) && !IsOperN(source_p))
{
sendto_one_notice(source_p, ":*** You need oper and N flag for +s +n");
source_p->snomask &= ~SNO_NCHANGE; /* only tcm's really need this */
}
if(MyClient(source_p) && (source_p->umodes & UMODE_OPERWALL) && !IsOperOperwall(source_p))
{
sendto_one_notice(source_p, ":*** You need oper and operwall flag for +z");
source_p->umodes &= ~UMODE_OPERWALL;
}
if(MyConnect(source_p) && (source_p->umodes & UMODE_ADMIN) &&
(!IsOperAdmin(source_p) || IsOperHiddenAdmin(source_p)))
{
sendto_one_notice(source_p, ":*** You need oper and A flag for +a");
source_p->umodes &= ~UMODE_ADMIN;
}
/* let modules providing usermodes know that we've changed our usermode --nenolod */
hdata.client = source_p;
hdata.oldumodes = setflags;
hdata.oldsnomask = setsnomask;
call_hook(h_umode_changed, &hdata);
if(!(setflags & UMODE_INVISIBLE) && IsInvisible(source_p))
++Count.invisi;
if((setflags & UMODE_INVISIBLE) && !IsInvisible(source_p))
--Count.invisi;
/*
* compare new flags with old flags and send string which
* will cause servers to update correctly.
*/
send_umode_out(client_p, source_p, setflags);
if (showsnomask && MyConnect(source_p))
sendto_one(source_p, form_str(RPL_SNOMASK), me.name, source_p->name,
construct_snobuf(source_p->snomask));
return (0);
}
/*
* send the MODE string for user (user) to connection client_p
* -avalon
*/
void
send_umode(struct Client *client_p, struct Client *source_p, int old, int sendmask, char *umode_buf)
{
int i;
int flag;
char *m;
int what = 0;
/*
* build a string in umode_buf to represent the change in the user's
* mode between the new (source_p->flag) and 'old'.
*/
m = umode_buf;
*m = '\0';
for (i = 0; i < 128; i++)
{
flag = user_modes[i];
if((flag & old) && !(source_p->umodes & flag))
{
if(what == MODE_DEL)
*m++ = (char) i;
else
{
what = MODE_DEL;
*m++ = '-';
*m++ = (char) i;
}
}
else if(!(flag & old) && (source_p->umodes & flag))
{
if(what == MODE_ADD)
*m++ = (char) i;
else
{
what = MODE_ADD;
*m++ = '+';
*m++ = (char) i;
}
}
}
*m = '\0';
if(*umode_buf && client_p)
sendto_one(client_p, ":%s MODE %s :%s", source_p->name, source_p->name, umode_buf);
}
/*
* send_umode_out
*
* inputs -
* output - NONE
* side effects -
*/
void
send_umode_out(struct Client *client_p, struct Client *source_p, int old)
{
struct Client *target_p;
char buf[BUFSIZE];
dlink_node *ptr;
send_umode(NULL, source_p, old, 0, buf);
DLINK_FOREACH(ptr, serv_list.head)
{
target_p = ptr->data;
if((target_p != client_p) && (target_p != source_p) && (*buf))
{
sendto_one(target_p, ":%s MODE %s :%s",
get_id(source_p, target_p),
get_id(source_p, target_p), buf);
}
}
if(client_p && MyClient(client_p))
send_umode(client_p, source_p, old, 0, buf);
}
/*
* user_welcome
*
* inputs - client pointer to client to welcome
* output - NONE
* side effects -
*/
void
user_welcome(struct Client *source_p)
{
sendto_one(source_p, form_str(RPL_WELCOME), me.name, source_p->name,
ServerInfo.network_name, source_p->name);
sendto_one(source_p, form_str(RPL_YOURHOST), me.name,
source_p->name,
get_listener_name(source_p->localClient->listener), ircd_version);
sendto_one(source_p, form_str(RPL_CREATED), me.name, source_p->name, creation);
sendto_one(source_p, form_str(RPL_MYINFO), me.name, source_p->name, me.name, ircd_version, umodebuf);
show_isupport(source_p);
show_lusers(source_p);
if(ConfigFileEntry.short_motd)
{
sendto_one_notice(source_p, ":*** Notice -- motd was last changed at %s", user_motd_changed);
sendto_one_notice(source_p, ":*** Notice -- Please read the motd if you haven't read it");
sendto_one(source_p, form_str(RPL_MOTDSTART),
me.name, source_p->name, me.name);
sendto_one(source_p, form_str(RPL_MOTD),
me.name, source_p->name, "*** This is the short motd ***");
sendto_one(source_p, form_str(RPL_ENDOFMOTD), me.name, source_p->name);
}
else
send_user_motd(source_p);
}
/* oper_up()
*
* inputs - pointer to given client to oper
* - pointer to ConfItem to use
* output - none
* side effects - opers up source_p using aconf for reference
*/
int
oper_up(struct Client *source_p, struct oper_conf *oper_p)
{
unsigned int old = source_p->umodes, oldsnomask = source_p->snomask;
hook_data_umode_changed hdata;
SetOper(source_p);
if(oper_p->umodes)
source_p->umodes |= oper_p->umodes;
else if(ConfigFileEntry.oper_umodes)
source_p->umodes |= ConfigFileEntry.oper_umodes;
else
source_p->umodes |= DEFAULT_OPER_UMODES;
if (oper_p->snomask)
{
source_p->snomask |= oper_p->snomask;
source_p->umodes |= UMODE_SERVNOTICE;
}
else if (source_p->umodes & UMODE_SERVNOTICE)
{
/* Only apply these if +s is already set -- jilles */
if (ConfigFileEntry.oper_snomask)
source_p->snomask |= ConfigFileEntry.oper_snomask;
else
source_p->snomask |= DEFAULT_OPER_SNOMASK;
}
Count.oper++;
SetExemptKline(source_p);
source_p->flags2 |= oper_p->flags;
DupString(source_p->localClient->opername, oper_p->name);
dlinkAddAlloc(source_p, &local_oper_list);
dlinkAddAlloc(source_p, &oper_list);
if(IsOperAdmin(source_p) && !IsOperHiddenAdmin(source_p))
source_p->umodes |= UMODE_ADMIN;
if(!IsOperN(source_p))
source_p->snomask &= ~SNO_NCHANGE;
if(!IsOperOperwall(source_p))
source_p->umodes &= ~UMODE_OPERWALL;
hdata.client = source_p;
hdata.oldumodes = old;
hdata.oldsnomask = oldsnomask;
call_hook(h_umode_changed, &hdata);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s (%s@%s) is now an operator", source_p->name,
source_p->username, source_p->host);
if(!(old & UMODE_INVISIBLE) && IsInvisible(source_p))
++Count.invisi;
if((old & UMODE_INVISIBLE) && !IsInvisible(source_p))
--Count.invisi;
send_umode_out(source_p, source_p, old);
sendto_one(source_p, form_str(RPL_SNOMASK), me.name, source_p->name,
construct_snobuf(source_p->snomask));
sendto_one(source_p, form_str(RPL_YOUREOPER), me.name, source_p->name);
sendto_one_notice(source_p, ":*** Oper privs are %s", get_oper_privs(oper_p->flags));
send_oper_motd(source_p);
return (1);
}
/*
* find_umode_slot
*
* inputs - NONE
* outputs - an available umode bitmask or
* 0 if no umodes are available
* side effects - NONE
*/
unsigned int
find_umode_slot(void)
{
unsigned int all_umodes = 0, my_umode = 0, i;
for (i = 0; i < 128; i++)
all_umodes |= user_modes[i];
for (my_umode = 1; my_umode && (all_umodes & my_umode);
my_umode <<= 1);
return my_umode;
}
void
construct_umodebuf(void)
{
int i;
char *ptr = umodebuf;
static int prev_user_modes[128];
*ptr = '\0';
for (i = 0; i < 128; i++)
{
if (prev_user_modes[i] != 0 && prev_user_modes[i] != user_modes[i])
{
if (user_modes[i] == 0)
{
orphaned_umodes |= prev_user_modes[i];
sendto_realops_snomask(SNO_DEBUG, L_ALL, "Umode +%c is now orphaned", i);
}
else
{
orphaned_umodes &= ~prev_user_modes[i];
sendto_realops_snomask(SNO_DEBUG, L_ALL, "Orphaned umode +%c is picked up by module", i);
}
user_modes[i] = prev_user_modes[i];
}
else
prev_user_modes[i] = user_modes[i];
if (user_modes[i])
*ptr++ = (char) i;
}
*ptr++ = '\0';
}
void
change_nick_user_host(struct Client *target_p, const char *nick, const char *user,
const char *host, int newts, char *format, ...)
{
dlink_node *ptr;
struct Channel *chptr;
struct membership *mscptr;
int changed = irccmp(target_p->name, nick);
int changed_case = strcmp(target_p->name, nick);
int do_qjm = irccmp(target_p->username, user) || irccmp(target_p->host, host);
char mode[10], modeval[NICKLEN * 2 + 2], reason[256], *mptr;
va_list ap;
modeval[0] = '\0';
if(changed)
{
target_p->tsinfo = newts;
monitor_signoff(target_p);
}
invalidate_bancache_user(target_p);
if(do_qjm)
{
va_start(ap, format);
vsnprintf(reason, 255, format, ap);
va_end(ap);
sendto_common_channels_local_butone(target_p, ":%s!%s@%s QUIT :%s",
target_p->name, target_p->username, target_p->host,
reason);
DLINK_FOREACH(ptr, target_p->user->channel.head)
{
mscptr = ptr->data;
chptr = mscptr->chptr;
mptr = mode;
if(is_chanop(mscptr))
{
*mptr++ = 'o';
strcat(modeval, nick);
strcat(modeval, " ");
}
if(is_voiced(mscptr))
{
*mptr++ = 'v';
strcat(modeval, nick);
}
*mptr = '\0';
sendto_channel_local_butone(target_p, ALL_MEMBERS, chptr, ":%s!%s@%s JOIN :%s",
nick, user, host, chptr->chname);
if(*mode)
sendto_channel_local_butone(target_p, ALL_MEMBERS, chptr,
":%s MODE %s +%s %s",
target_p->servptr->name,
chptr->chname, mode, modeval);
*modeval = '\0';
}
if(MyClient(target_p) && changed_case)
sendto_one(target_p, ":%s!%s@%s NICK %s",
target_p->name, target_p->username, target_p->host, nick);
}
else if(changed_case)
{
sendto_common_channels_local(target_p, ":%s!%s@%s NICK :%s",
target_p->name, target_p->username,
target_p->host, nick);
}
strlcpy(target_p->username, user, sizeof target_p->username);
strlcpy(target_p->host, host, sizeof target_p->host);
if (changed)
add_history(target_p, 1);
del_from_client_hash(target_p->name, target_p);
strlcpy(target_p->name, nick, NICKLEN);
add_to_client_hash(target_p->name, target_p);
if(changed)
{
monitor_signon(target_p);
del_all_accepts(target_p);
}
}
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