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elemental-ircd/modules/m_who.c

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/*
* ircd-ratbox: A slightly useful ircd.
* m_who.c: Shows who is on a channel.
*
* 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: m_who.c 3350 2007-04-02 22:03:08Z jilles $
*/
#include "stdinc.h"
#include "common.h"
#include "client.h"
#include "channel.h"
#include "hash.h"
#include "ircd.h"
#include "numeric.h"
#include "s_serv.h"
#include "send.h"
#include "match.h"
#include "s_conf.h"
#include "logger.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "packet.h"
#include "s_newconf.h"
#define FIELD_CHANNEL 0x0001
#define FIELD_HOP 0x0002
#define FIELD_FLAGS 0x0004
#define FIELD_HOST 0x0008
#define FIELD_IP 0x0010
#define FIELD_IDLE 0x0020
#define FIELD_NICK 0x0040
#define FIELD_INFO 0x0080
#define FIELD_SERVER 0x0100
#define FIELD_QUERYTYPE 0x0200 /* cookie for client */
#define FIELD_USER 0x0400
#define FIELD_ACCOUNT 0x0800
#define FIELD_OPLEVEL 0x1000 /* meaningless and stupid, but whatever */
struct who_format
{
int fields;
const char *querytype;
};
static int m_who(struct Client *, struct Client *, int, const char **);
struct Message who_msgtab = {
"WHO", 0, 0, 0, MFLG_SLOW,
{mg_unreg, {m_who, 2}, mg_ignore, mg_ignore, mg_ignore, {m_who, 2}}
};
mapi_clist_av1 who_clist[] = { &who_msgtab, NULL };
DECLARE_MODULE_AV1(who, NULL, NULL, who_clist, NULL, NULL, "$Revision: 3350 $");
static void do_who_on_channel(struct Client *source_p, struct Channel *chptr,
int server_oper, int member,
struct who_format *fmt);
static void who_global(struct Client *source_p, const char *mask, int server_oper, int operspy, struct who_format *fmt);
static void do_who(struct Client *source_p,
struct Client *target_p, struct membership *msptr,
struct who_format *fmt);
/*
** m_who
** parv[1] = nickname mask list
** parv[2] = additional selection flag and format options
*/
static int
m_who(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
static time_t last_used = 0;
struct Client *target_p;
struct membership *msptr;
char *mask;
rb_dlink_node *lp;
struct Channel *chptr = NULL;
int server_oper = parc > 2 ? (*parv[2] == 'o') : 0; /* Show OPERS only */
int member;
int operspy = 0;
struct who_format fmt;
const char *s;
char maskcopy[512];
fmt.fields = 0;
fmt.querytype = NULL;
if (parc > 2 && (s = strchr(parv[2], '%')) != NULL)
{
s++;
for (; *s != '\0'; s++)
{
switch (*s)
{
case 'c': fmt.fields |= FIELD_CHANNEL; break;
case 'd': fmt.fields |= FIELD_HOP; break;
case 'f': fmt.fields |= FIELD_FLAGS; break;
case 'h': fmt.fields |= FIELD_HOST; break;
case 'i': fmt.fields |= FIELD_IP; break;
case 'l': fmt.fields |= FIELD_IDLE; break;
case 'n': fmt.fields |= FIELD_NICK; break;
case 'r': fmt.fields |= FIELD_INFO; break;
case 's': fmt.fields |= FIELD_SERVER; break;
case 't': fmt.fields |= FIELD_QUERYTYPE; break;
case 'u': fmt.fields |= FIELD_USER; break;
case 'a': fmt.fields |= FIELD_ACCOUNT; break;
case 'o': fmt.fields |= FIELD_OPLEVEL; break;
case ',':
s++;
fmt.querytype = s;
s += strlen(s);
s--;
break;
}
}
if (EmptyString(fmt.querytype) || strlen(fmt.querytype) > 3)
fmt.querytype = "0";
}
rb_strlcpy(maskcopy, parv[1], sizeof maskcopy);
mask = maskcopy;
collapse(mask);
/* '/who *' */
if((*(mask + 1) == '\0') && (*mask == '*'))
{
if(source_p->user == NULL)
return 0;
if((lp = source_p->user->channel.head) != NULL)
{
msptr = lp->data;
do_who_on_channel(source_p, msptr->chptr, server_oper, YES, &fmt);
}
sendto_one(source_p, form_str(RPL_ENDOFWHO),
me.name, source_p->name, "*");
return 0;
}
if(IsOperSpy(source_p) && *mask == '!')
{
mask++;
operspy = 1;
if(EmptyString(mask))
{
sendto_one(source_p, form_str(RPL_ENDOFWHO),
me.name, source_p->name, parv[1]);
return 0;
}
}
/* '/who #some_channel' */
if(IsChannelName(mask))
{
/* List all users on a given channel */
chptr = find_channel(parv[1] + operspy);
if(chptr != NULL)
{
if(operspy)
report_operspy(source_p, "WHO", chptr->chname);
if(IsMember(source_p, chptr) || operspy)
do_who_on_channel(source_p, chptr, server_oper, YES, &fmt);
else if(!SecretChannel(chptr))
do_who_on_channel(source_p, chptr, server_oper, NO, &fmt);
}
sendto_one(source_p, form_str(RPL_ENDOFWHO),
me.name, source_p->name, parv[1] + operspy);
return 0;
}
/* '/who nick' */
if(((target_p = find_named_person(mask)) != NULL) &&
(!server_oper || IsOper(target_p)))
{
int isinvis = 0;
isinvis = IsInvisible(target_p);
RB_DLINK_FOREACH(lp, target_p->user->channel.head)
{
msptr = lp->data;
chptr = msptr->chptr;
member = IsMember(source_p, chptr);
if(isinvis && !member)
continue;
if(member || (!isinvis && PubChannel(chptr)))
break;
}
/* if we stopped midlist, lp->data is the membership for
* target_p of chptr
*/
if(lp != NULL)
do_who(source_p, target_p, lp->data, &fmt);
else
do_who(source_p, target_p, NULL, &fmt);
sendto_one(source_p, form_str(RPL_ENDOFWHO),
me.name, source_p->name, mask);
return 0;
}
if(!IsFloodDone(source_p))
flood_endgrace(source_p);
/* it has to be a global who at this point, limit it */
if(!IsOper(source_p))
{
if((last_used + ConfigFileEntry.pace_wait) > rb_current_time())
{
sendto_one(source_p, form_str(RPL_LOAD2HI),
me.name, source_p->name, "WHO");
sendto_one(source_p, form_str(RPL_ENDOFWHO),
me.name, source_p->name, "*");
return 0;
}
else
last_used = rb_current_time();
}
/* Note: operspy_dont_care_user_info does not apply to
* who on channels */
if(IsOperSpy(source_p) && ConfigFileEntry.operspy_dont_care_user_info)
operspy = 1;
/* '/who 0' for a global list. this forces clients to actually
* request a full list. I presume its because of too many typos
* with "/who" ;) --fl
*/
if((*(mask + 1) == '\0') && (*mask == '0'))
who_global(source_p, NULL, server_oper, 0, &fmt);
else
who_global(source_p, mask, server_oper, operspy, &fmt);
sendto_one(source_p, form_str(RPL_ENDOFWHO),
me.name, source_p->name, mask);
return 0;
}
/* who_common_channel
* inputs - pointer to client requesting who
* - pointer to channel member chain.
* - char * mask to match
* - int if oper on a server or not
* - pointer to int maxmatches
* - format options
* output - NONE
* side effects - lists matching invisible clients on specified channel,
* marks matched clients.
*/
static void
who_common_channel(struct Client *source_p, struct Channel *chptr,
const char *mask, int server_oper, int *maxmatches,
struct who_format *fmt)
{
struct membership *msptr;
struct Client *target_p;
rb_dlink_node *ptr;
RB_DLINK_FOREACH(ptr, chptr->members.head)
{
msptr = ptr->data;
target_p = msptr->client_p;
if(!IsInvisible(target_p) || IsMarked(target_p))
continue;
if(server_oper && !IsOper(target_p))
continue;
SetMark(target_p);
if(*maxmatches > 0)
{
if((mask == NULL) ||
match(mask, target_p->name) || match(mask, target_p->username) ||
match(mask, target_p->host) || match(mask, target_p->servptr->name) ||
(IsOper(source_p) && match(mask, target_p->orighost)) ||
match(mask, target_p->info))
{
do_who(source_p, target_p, NULL, fmt);
--(*maxmatches);
}
}
}
}
/*
* who_global
*
* inputs - pointer to client requesting who
* - char * mask to match
* - int if oper on a server or not
* - int if operspy or not
* - format options
* output - NONE
* side effects - do a global scan of all clients looking for match
* this is slightly expensive on EFnet ...
* marks assumed cleared for all clients initially
* and will be left cleared on return
*/
static void
who_global(struct Client *source_p, const char *mask, int server_oper, int operspy, struct who_format *fmt)
{
struct membership *msptr;
struct Client *target_p;
rb_dlink_node *lp, *ptr;
int maxmatches = 500;
/* first, list all matching INvisible clients on common channels
* if this is not an operspy who
*/
if(!operspy)
{
RB_DLINK_FOREACH(lp, source_p->user->channel.head)
{
msptr = lp->data;
who_common_channel(source_p, msptr->chptr, mask, server_oper, &maxmatches, fmt);
}
}
else if (!ConfigFileEntry.operspy_dont_care_user_info)
report_operspy(source_p, "WHO", mask);
/* second, list all matching visible clients and clear all marks
* on invisible clients
* if this is an operspy who, list all matching clients, no need
* to clear marks
*/
RB_DLINK_FOREACH(ptr, global_client_list.head)
{
target_p = ptr->data;
if(!IsPerson(target_p))
continue;
if(IsInvisible(target_p) && !operspy)
{
ClearMark(target_p);
continue;
}
if(server_oper && !IsOper(target_p))
continue;
if(maxmatches > 0)
{
if(!mask ||
match(mask, target_p->name) || match(mask, target_p->username) ||
match(mask, target_p->host) || match(mask, target_p->servptr->name) ||
(IsOper(source_p) && match(mask, target_p->orighost)) ||
match(mask, target_p->info))
{
do_who(source_p, target_p, NULL, fmt);
--maxmatches;
}
}
}
if (maxmatches <= 0)
sendto_one(source_p,
form_str(ERR_TOOMANYMATCHES),
me.name, source_p->name, "WHO");
}
/*
* do_who_on_channel
*
* inputs - pointer to client requesting who
* - pointer to channel to do who on
* - The "real name" of this channel
* - int if source_p is a server oper or not
* - int if client is member or not
* - format options
* output - NONE
* side effects - do a who on given channel
*/
static void
do_who_on_channel(struct Client *source_p, struct Channel *chptr,
int server_oper, int member, struct who_format *fmt)
{
struct Client *target_p;
struct membership *msptr;
rb_dlink_node *ptr;
RB_DLINK_FOREACH(ptr, chptr->members.head)
{
msptr = ptr->data;
target_p = msptr->client_p;
if(server_oper && !IsOper(target_p))
continue;
if(member || !IsInvisible(target_p))
do_who(source_p, target_p, msptr, fmt);
}
}
/*
* append_format
*
* inputs - pointer to buffer
* - size of buffer
* - pointer to position
* - format string
* - arguments for format
* output - NONE
* side effects - position incremented, possibly beyond size of buffer
* this allows detecting overflow
*/
static void
append_format(char *buf, size_t bufsize, size_t *pos, const char *fmt, ...)
{
size_t max, result;
va_list ap;
max = *pos >= bufsize ? 0 : bufsize - *pos;
va_start(ap, fmt);
result = rb_vsnprintf(buf + *pos, bufsize - *pos, fmt, ap);
va_end(ap);
*pos += result;
}
/*
* do_who
*
* inputs - pointer to client requesting who
* - pointer to client to do who on
* - channel membership or NULL
* - format options
* output - NONE
* side effects - do a who on given person
*/
static void
do_who(struct Client *source_p, struct Client *target_p, struct membership *msptr, struct who_format *fmt)
{
char status[16];
char str[510 + 1]; /* linebuf.c will add \r\n */
size_t pos;
const char *q;
rb_sprintf(status, "%c%s%s",
target_p->user->away ? 'G' : 'H', IsOper(target_p) ? "*" : "", msptr ? find_channel_status(msptr, fmt->fields || IsCapable(source_p, CLICAP_MULTI_PREFIX)) : "");
if (fmt->fields == 0)
sendto_one(source_p, form_str(RPL_WHOREPLY), me.name,
source_p->name, msptr ? msptr->chptr->chname : "*",
target_p->username, target_p->host,
target_p->servptr->name, target_p->name, status,
ConfigServerHide.flatten_links && !IsOper(source_p) && !IsExemptShide(source_p) ? 0 : target_p->hopcount,
target_p->info);
else
{
str[0] = '\0';
pos = 0;
append_format(str, sizeof str, &pos, ":%s %d %s",
me.name, RPL_WHOSPCRPL, source_p->name);
if (fmt->fields & FIELD_QUERYTYPE)
append_format(str, sizeof str, &pos, " %s", fmt->querytype);
if (fmt->fields & FIELD_CHANNEL)
append_format(str, sizeof str, &pos, " %s", msptr ? msptr->chptr->chname : "*");
if (fmt->fields & FIELD_USER)
append_format(str, sizeof str, &pos, " %s", target_p->username);
if (fmt->fields & FIELD_IP)
{
if (show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0"))
append_format(str, sizeof str, &pos, " %s", target_p->sockhost);
else
append_format(str, sizeof str, &pos, " %s", "255.255.255.255");
}
if (fmt->fields & FIELD_HOST)
append_format(str, sizeof str, &pos, " %s", target_p->host);
if (fmt->fields & FIELD_SERVER)
append_format(str, sizeof str, &pos, " %s", target_p->servptr->name);
if (fmt->fields & FIELD_NICK)
append_format(str, sizeof str, &pos, " %s", target_p->name);
if (fmt->fields & FIELD_FLAGS)
append_format(str, sizeof str, &pos, " %s", status);
if (fmt->fields & FIELD_HOP)
append_format(str, sizeof str, &pos, " %d", ConfigServerHide.flatten_links && !IsOper(source_p) && !IsExemptShide(source_p) ? 0 : target_p->hopcount);
if (fmt->fields & FIELD_IDLE)
append_format(str, sizeof str, &pos, " %d", (int)(MyClient(target_p) ? rb_current_time() - target_p->localClient->last : 0));
if (fmt->fields & FIELD_ACCOUNT)
{
/* display as in whois */
q = target_p->user->suser;
if (!EmptyString(q))
{
while(IsDigit(*q))
q++;
if(*q == '\0')
q = target_p->user->suser;
}
else
q = "0";
append_format(str, sizeof str, &pos, " %s", q);
}
if (fmt->fields & FIELD_OPLEVEL)
append_format(str, sizeof str, &pos, " %s", is_chanop(msptr) ? "999" : "n/a");
if (fmt->fields & FIELD_INFO)
append_format(str, sizeof str, &pos, " :%s", target_p->info);
if (pos >= sizeof str)
{
static int warned = 0;
if (!warned)
sendto_realops_snomask(SNO_DEBUG, L_NETWIDE,
"WHOX overflow while sending information about %s to %s",
target_p->name, source_p->name);
warned = 1;
}
sendto_one(source_p, "%s", str);
}
}
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