[solanum.git] / modules / m_who.c

/*
 *  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
 */
#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"
#include "ratelimit.h"
#include "supported.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 */

static const char who_desc[] =
	"Provides the WHO command to display information for users on a channel";

struct who_format
{
	int fields;
	const char *querytype;
};

static void m_who(struct MsgBuf *, struct Client *, struct Client *, int, const char **);

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);

struct Message who_msgtab = {
	"WHO", 0, 0, 0, 0,
	{mg_unreg, {m_who, 2}, mg_ignore, mg_ignore, mg_ignore, {m_who, 2}}
};

static int
_modinit(void)
{
	add_isupport("WHOX", isupport_string, "");
	return 0;
}

static void
_moddeinit(void)
{
	delete_isupport("WHOX");
}

mapi_clist_av1 who_clist[] = { &who_msgtab, NULL };
DECLARE_MODULE_AV2(who, _modinit, _moddeinit, who_clist, NULL, NULL, NULL, NULL, who_desc);

/*
** m_who
**      parv[1] = nickname mask list
**      parv[2] = additional selection flag and format options
*/
static void
m_who(struct MsgBuf *msgbuf_p, 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;

		if((lp = source_p->user->channel.head) != NULL)
		{
			msptr = lp->data;
			do_who_on_channel(source_p, msptr->chptr, server_oper, true, &fmt);
		}

		sendto_one(source_p, form_str(RPL_ENDOFWHO),
			   me.name, source_p->name, "*");
		return;
	}

	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;
		}
	}

	/* '/who #some_channel' */
	if(IsChannelName(mask))
	{
		/* List all users on a given channel */
		chptr = find_channel(parv[1] + operspy);

		if(chptr != NULL)
		{
			if (!IsOper(source_p) && !ratelimit_client_who(source_p, rb_dlink_list_length(&chptr->members)/50))
			{
				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;
			}

			if(operspy)
				report_operspy(source_p, "WHO", chptr->chname);

			if(IsMember(source_p, chptr) || operspy)
				do_who_on_channel(source_p, chptr, server_oper, true, &fmt);
			else if(!SecretChannel(chptr))
				do_who_on_channel(source_p, chptr, server_oper, false, &fmt);
		}

		sendto_one(source_p, form_str(RPL_ENDOFWHO),
			   me.name, source_p->name, parv[1] + operspy);
		return;
	}

	/* '/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;
	}

	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() || !ratelimit_client(source_p, 1))
		{
			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;
		}
		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);
}

/* 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 = vsnprintf(buf + *pos, max, 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;

	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 bool warned = false;
			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 = true;
		}
		sendto_one(source_p, "%s", str);
	}
}
Commit	Line	Data
212380e3 AC	1	/*
	2	* ircd-ratbox: A slightly useful ircd.
	3	* m_who.c: Shows who is on a channel.
	4	*
	5	* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
	6	* Copyright (C) 1996-2002 Hybrid Development Team
	7	* Copyright (C) 2002-2005 ircd-ratbox development team
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
	22	* USA
212380e3 AC	23	*/
212380e3 AC	24	#include "stdinc.h"
212380e3 AC	25	#include "common.h"
	26	#include "client.h"
	27	#include "channel.h"
	28	#include "hash.h"
	29	#include "ircd.h"
	30	#include "numeric.h"
	31	#include "s_serv.h"
	32	#include "send.h"
4562c604	33	#include "match.h"
212380e3	34	#include "s_conf.h"
4016731b	35	#include "logger.h"
212380e3 AC	36	#include "msg.h"
	37	#include "parse.h"
	38	#include "modules.h"
	39	#include "packet.h"
	40	#include "s_newconf.h"
7e132ff0	41	#include "ratelimit.h"
0b904d91	42	#include "supported.h"
212380e3	43
48957a49 JT	44	#define FIELD_CHANNEL 0x0001
	45	#define FIELD_HOP 0x0002
	46	#define FIELD_FLAGS 0x0004
	47	#define FIELD_HOST 0x0008
	48	#define FIELD_IP 0x0010
	49	#define FIELD_IDLE 0x0020
	50	#define FIELD_NICK 0x0040
	51	#define FIELD_INFO 0x0080
	52	#define FIELD_SERVER 0x0100
	53	#define FIELD_QUERYTYPE 0x0200 /* cookie for client */
	54	#define FIELD_USER 0x0400
	55	#define FIELD_ACCOUNT 0x0800
	56	#define FIELD_OPLEVEL 0x1000 /* meaningless and stupid, but whatever */
	57
eeabf33a EM	58	static const char who_desc[] =
	59	"Provides the WHO command to display information for users on a channel";
	60
48957a49 JT	61	struct who_format
	62	{
	63	int fields;
	64	const char *querytype;
	65	};
	66
3c7d6fcc EM	67	static void m_who(struct MsgBuf , struct Client , struct Client , int, const char *);
	68
	69	static void do_who_on_channel(struct Client source_p, struct Channel chptr,
	70	int server_oper, int member,
	71	struct who_format *fmt);
	72	static void who_global(struct Client source_p, const char mask, int server_oper, int operspy, struct who_format *fmt);
	73	static void do_who(struct Client *source_p,
	74	struct Client target_p, struct membership msptr,
	75	struct who_format *fmt);
212380e3 AC	76
212380e3 AC	77	struct Message who_msgtab = {
7baa37a9	78	"WHO", 0, 0, 0, 0,
212380e3 AC	79	{mg_unreg, {m_who, 2}, mg_ignore, mg_ignore, mg_ignore, {m_who, 2}}
	80	};
	81
0b904d91 AC	82	static int
	83	_modinit(void)
	84	{
	85	add_isupport("WHOX", isupport_string, "");
	86	return 0;
	87	}
	88
	89	static void
	90	_moddeinit(void)
	91	{
	92	delete_isupport("WHOX");
	93	}
	94
212380e3	95	mapi_clist_av1 who_clist[] = { &who_msgtab, NULL };
3bf449fe	96	DECLARE_MODULE_AV2(who, _modinit, _moddeinit, who_clist, NULL, NULL, NULL, NULL, who_desc);
212380e3	97
212380e3 AC	98	/*
212380e3 AC	99	** m_who
212380e3	100	** parv[1] = nickname mask list
48957a49	101	** parv[2] = additional selection flag and format options
212380e3	102	*/
3c7d6fcc	103	static void
428ca87b	104	m_who(struct MsgBuf msgbuf_p, struct Client client_p, struct Client source_p, int parc, const char parv[])
212380e3 AC	105	{
	106	static time_t last_used = 0;
	107	struct Client *target_p;
	108	struct membership *msptr;
	109	char *mask;
5b96d9a6	110	rb_dlink_node *lp;
212380e3 AC	111	struct Channel *chptr = NULL;
	112	int server_oper = parc > 2 ? (parv[2] == 'o') : 0; / Show OPERS only */
	113	int member;
	114	int operspy = 0;
48957a49 JT	115	struct who_format fmt;
48957a49 JT	116	const char *s;
04d77684	117	char maskcopy[512];
48957a49 JT	118
	119	fmt.fields = 0;
	120	fmt.querytype = NULL;
	121	if (parc > 2 && (s = strchr(parv[2], '%')) != NULL)
	122	{
	123	s++;
	124	for (; *s != '\0'; s++)
	125	{
	126	switch (*s)
	127	{
	128	case 'c': fmt.fields \|= FIELD_CHANNEL; break;
	129	case 'd': fmt.fields \|= FIELD_HOP; break;
	130	case 'f': fmt.fields \|= FIELD_FLAGS; break;
	131	case 'h': fmt.fields \|= FIELD_HOST; break;
	132	case 'i': fmt.fields \|= FIELD_IP; break;
	133	case 'l': fmt.fields \|= FIELD_IDLE; break;
	134	case 'n': fmt.fields \|= FIELD_NICK; break;
	135	case 'r': fmt.fields \|= FIELD_INFO; break;
	136	case 's': fmt.fields \|= FIELD_SERVER; break;
	137	case 't': fmt.fields \|= FIELD_QUERYTYPE; break;
	138	case 'u': fmt.fields \|= FIELD_USER; break;
	139	case 'a': fmt.fields \|= FIELD_ACCOUNT; break;
	140	case 'o': fmt.fields \|= FIELD_OPLEVEL; break;
	141	case ',':
	142	s++;
	143	fmt.querytype = s;
	144	s += strlen(s);
	145	s--;
	146	break;
	147	}
	148	}
	149	if (EmptyString(fmt.querytype) \|\| strlen(fmt.querytype) > 3)
	150	fmt.querytype = "0";
	151	}
212380e3	152
62656efd	153	rb_strlcpy(maskcopy, parv[1], sizeof maskcopy);
04d77684	154	mask = maskcopy;
212380e3 AC	155
	156	collapse(mask);
	157
	158	/* '/who ' /
	159	if(((mask + 1) == '\0') && (mask == '*'))
	160	{
	161	if(source_p->user == NULL)
3c7d6fcc	162	return;
212380e3 AC	163
	164	if((lp = source_p->user->channel.head) != NULL)
	165	{
	166	msptr = lp->data;
3c7d6fcc	167	do_who_on_channel(source_p, msptr->chptr, server_oper, true, &fmt);
212380e3 AC	168	}
	169
	170	sendto_one(source_p, form_str(RPL_ENDOFWHO),
	171	me.name, source_p->name, "*");
3c7d6fcc	172	return;
212380e3 AC	173	}
	174
	175	if(IsOperSpy(source_p) && *mask == '!')
	176	{
	177	mask++;
	178	operspy = 1;
	179
	180	if(EmptyString(mask))
	181	{
	182	sendto_one(source_p, form_str(RPL_ENDOFWHO),
	183	me.name, source_p->name, parv[1]);
3c7d6fcc	184	return;
212380e3 AC	185	}
	186	}
	187
	188	/* '/who #some_channel' */
	189	if(IsChannelName(mask))
	190	{
	191	/* List all users on a given channel */
f71e18ee	192	chptr = find_channel(parv[1] + operspy);
7e132ff0	193
212380e3 AC	194	if(chptr != NULL)
212380e3 AC	195	{
7e132ff0 KB	196	if (!IsOper(source_p) && !ratelimit_client_who(source_p, rb_dlink_list_length(&chptr->members)/50))
	197	{
	198	sendto_one(source_p, form_str(RPL_LOAD2HI),
	199	me.name, source_p->name, "WHO");
	200	sendto_one(source_p, form_str(RPL_ENDOFWHO),
	201	me.name, source_p->name, "*");
3c7d6fcc	202	return;
7e132ff0 KB	203	}
7e132ff0 KB	204
212380e3 AC	205	if(operspy)
	206	report_operspy(source_p, "WHO", chptr->chname);
	207
	208	if(IsMember(source_p, chptr) \|\| operspy)
3c7d6fcc	209	do_who_on_channel(source_p, chptr, server_oper, true, &fmt);
212380e3	210	else if(!SecretChannel(chptr))
3c7d6fcc	211	do_who_on_channel(source_p, chptr, server_oper, false, &fmt);
212380e3	212	}
7e132ff0	213
212380e3	214	sendto_one(source_p, form_str(RPL_ENDOFWHO),
f71e18ee	215	me.name, source_p->name, parv[1] + operspy);
3c7d6fcc	216	return;
212380e3 AC	217	}
	218
	219	/* '/who nick' */
	220
	221	if(((target_p = find_named_person(mask)) != NULL) &&
	222	(!server_oper \|\| IsOper(target_p)))
	223	{
	224	int isinvis = 0;
	225
	226	isinvis = IsInvisible(target_p);
5b96d9a6	227	RB_DLINK_FOREACH(lp, target_p->user->channel.head)
212380e3 AC	228	{
	229	msptr = lp->data;
	230	chptr = msptr->chptr;
	231
	232	member = IsMember(source_p, chptr);
	233
	234	if(isinvis && !member)
	235	continue;
	236
	237	if(member \|\| (!isinvis && PubChannel(chptr)))
	238	break;
	239	}
	240
	241	/* if we stopped midlist, lp->data is the membership for
	242	* target_p of chptr
	243	*/
	244	if(lp != NULL)
02eca3f1	245	do_who(source_p, target_p, lp->data, &fmt);
212380e3	246	else
02eca3f1	247	do_who(source_p, target_p, NULL, &fmt);
212380e3	248
55abcbb2	249	sendto_one(source_p, form_str(RPL_ENDOFWHO),
212380e3	250	me.name, source_p->name, mask);
3c7d6fcc	251	return;
212380e3 AC	252	}
	253
	254	if(!IsFloodDone(source_p))
	255	flood_endgrace(source_p);
	256
	257	/* it has to be a global who at this point, limit it */
	258	if(!IsOper(source_p))
	259	{
7e132ff0	260	if((last_used + ConfigFileEntry.pace_wait) > rb_current_time() \|\| !ratelimit_client(source_p, 1))
212380e3 AC	261	{
	262	sendto_one(source_p, form_str(RPL_LOAD2HI),
	263	me.name, source_p->name, "WHO");
	264	sendto_one(source_p, form_str(RPL_ENDOFWHO),
	265	me.name, source_p->name, "*");
3c7d6fcc	266	return;
212380e3 AC	267	}
212380e3 AC	268	else
e3354945	269	last_used = rb_current_time();
212380e3 AC	270	}
	271
	272	/* Note: operspy_dont_care_user_info does not apply to
	273	* who on channels */
	274	if(IsOperSpy(source_p) && ConfigFileEntry.operspy_dont_care_user_info)
	275	operspy = 1;
	276
	277	/* '/who 0' for a global list. this forces clients to actually
	278	* request a full list. I presume its because of too many typos
	279	* with "/who" ;) --fl
	280	*/
	281	if(((mask + 1) == '\0') && (mask == '0'))
48957a49	282	who_global(source_p, NULL, server_oper, 0, &fmt);
212380e3	283	else
48957a49	284	who_global(source_p, mask, server_oper, operspy, &fmt);
212380e3 AC	285
	286	sendto_one(source_p, form_str(RPL_ENDOFWHO),
	287	me.name, source_p->name, mask);
212380e3 AC	288	}
	289
	290	/* who_common_channel
	291	* inputs - pointer to client requesting who
	292	* - pointer to channel member chain.
	293	* - char * mask to match
	294	* - int if oper on a server or not
	295	* - pointer to int maxmatches
48957a49	296	* - format options
212380e3 AC	297	* output - NONE
	298	* side effects - lists matching invisible clients on specified channel,
	299	* marks matched clients.
	300	*/
	301	static void
	302	who_common_channel(struct Client source_p, struct Channel chptr,
48957a49 JT	303	const char mask, int server_oper, int maxmatches,
48957a49 JT	304	struct who_format *fmt)
212380e3 AC	305	{
	306	struct membership *msptr;
	307	struct Client *target_p;
5b96d9a6	308	rb_dlink_node *ptr;
212380e3	309
5b96d9a6	310	RB_DLINK_FOREACH(ptr, chptr->members.head)
212380e3 AC	311	{
	312	msptr = ptr->data;
	313	target_p = msptr->client_p;
	314
	315	if(!IsInvisible(target_p) \|\| IsMarked(target_p))
	316	continue;
	317
	318	if(server_oper && !IsOper(target_p))
	319	continue;
	320
	321	SetMark(target_p);
	322
	323	if(*maxmatches > 0)
	324	{
	325	if((mask == NULL) \|\|
	326	match(mask, target_p->name) \|\| match(mask, target_p->username) \|\|
c88cdb00	327	match(mask, target_p->host) \|\| match(mask, target_p->servptr->name) \|\|
212380e3 AC	328	(IsOper(source_p) && match(mask, target_p->orighost)) \|\|
	329	match(mask, target_p->info))
	330	{
02eca3f1	331	do_who(source_p, target_p, NULL, fmt);
212380e3 AC	332	--(*maxmatches);
	333	}
	334	}
	335	}
	336	}
	337
	338	/*
	339	* who_global
	340	*
	341	* inputs - pointer to client requesting who
	342	* - char * mask to match
	343	* - int if oper on a server or not
48957a49 JT	344	* - int if operspy or not
48957a49 JT	345	* - format options
212380e3 AC	346	* output - NONE
	347	* side effects - do a global scan of all clients looking for match
	348	* this is slightly expensive on EFnet ...
	349	* marks assumed cleared for all clients initially
	350	* and will be left cleared on return
	351	*/
	352	static void
48957a49	353	who_global(struct Client source_p, const char mask, int server_oper, int operspy, struct who_format *fmt)
212380e3 AC	354	{
	355	struct membership *msptr;
	356	struct Client *target_p;
5b96d9a6	357	rb_dlink_node lp, ptr;
212380e3 AC	358	int maxmatches = 500;
	359
	360	/* first, list all matching INvisible clients on common channels
	361	* if this is not an operspy who
	362	*/
	363	if(!operspy)
	364	{
5b96d9a6	365	RB_DLINK_FOREACH(lp, source_p->user->channel.head)
212380e3 AC	366	{
212380e3 AC	367	msptr = lp->data;
48957a49	368	who_common_channel(source_p, msptr->chptr, mask, server_oper, &maxmatches, fmt);
212380e3 AC	369	}
	370	}
	371	else if (!ConfigFileEntry.operspy_dont_care_user_info)
	372	report_operspy(source_p, "WHO", mask);
	373
	374	/* second, list all matching visible clients and clear all marks
	375	* on invisible clients
	376	* if this is an operspy who, list all matching clients, no need
	377	* to clear marks
	378	*/
5b96d9a6	379	RB_DLINK_FOREACH(ptr, global_client_list.head)
212380e3 AC	380	{
	381	target_p = ptr->data;
	382	if(!IsPerson(target_p))
	383	continue;
	384
	385	if(IsInvisible(target_p) && !operspy)
	386	{
	387	ClearMark(target_p);
	388	continue;
	389	}
	390
	391	if(server_oper && !IsOper(target_p))
	392	continue;
	393
	394	if(maxmatches > 0)
	395	{
	396	if(!mask \|\|
	397	match(mask, target_p->name) \|\| match(mask, target_p->username) \|\|
c88cdb00	398	match(mask, target_p->host) \|\| match(mask, target_p->servptr->name) \|\|
212380e3 AC	399	(IsOper(source_p) && match(mask, target_p->orighost)) \|\|
	400	match(mask, target_p->info))
	401	{
02eca3f1	402	do_who(source_p, target_p, NULL, fmt);
212380e3 AC	403	--maxmatches;
	404	}
	405	}
	406	}
	407
	408	if (maxmatches <= 0)
	409	sendto_one(source_p,
	410	form_str(ERR_TOOMANYMATCHES),
	411	me.name, source_p->name, "WHO");
	412	}
	413
	414	/*
	415	* do_who_on_channel
	416	*
	417	* inputs - pointer to client requesting who
	418	* - pointer to channel to do who on
	419	* - The "real name" of this channel
	420	* - int if source_p is a server oper or not
	421	* - int if client is member or not
48957a49	422	* - format options
212380e3 AC	423	* output - NONE
	424	* side effects - do a who on given channel
	425	*/
	426	static void
	427	do_who_on_channel(struct Client source_p, struct Channel chptr,
48957a49	428	int server_oper, int member, struct who_format *fmt)
212380e3 AC	429	{
	430	struct Client *target_p;
	431	struct membership *msptr;
5b96d9a6	432	rb_dlink_node *ptr;
212380e3	433
5b96d9a6	434	RB_DLINK_FOREACH(ptr, chptr->members.head)
212380e3 AC	435	{
	436	msptr = ptr->data;
	437	target_p = msptr->client_p;
	438
	439	if(server_oper && !IsOper(target_p))
	440	continue;
	441
	442	if(member \|\| !IsInvisible(target_p))
02eca3f1	443	do_who(source_p, target_p, msptr, fmt);
212380e3 AC	444	}
	445	}
	446
bac250f6 JT	447	/*
	448	* append_format
	449	*
	450	* inputs - pointer to buffer
	451	* - size of buffer
	452	* - pointer to position
	453	* - format string
	454	* - arguments for format
	455	* output - NONE
	456	* side effects - position incremented, possibly beyond size of buffer
	457	* this allows detecting overflow
	458	*/
	459	static void
	460	append_format(char buf, size_t bufsize, size_t pos, const char *fmt, ...)
	461	{
	462	size_t max, result;
	463	va_list ap;
	464
	465	max = pos >= bufsize ? 0 : bufsize - pos;
	466	va_start(ap, fmt);
5203cba5	467	result = vsnprintf(buf + *pos, max, fmt, ap);
bac250f6 JT	468	va_end(ap);
	469	*pos += result;
	470	}
	471
212380e3 AC	472	/*
	473	* do_who
	474	*
	475	* inputs - pointer to client requesting who
	476	* - pointer to client to do who on
02eca3f1	477	* - channel membership or NULL
48957a49	478	* - format options
212380e3 AC	479	* output - NONE
	480	* side effects - do a who on given person
	481	*/
	482
	483	static void
02eca3f1	484	do_who(struct Client source_p, struct Client target_p, struct membership msptr, struct who_format fmt)
212380e3	485	{
ea6dade2	486	char status[16];
bac250f6 JT	487	char str[510 + 1]; /* linebuf.c will add \r\n */
bac250f6 JT	488	size_t pos;
48957a49	489	const char *q;
212380e3	490
5203cba5	491	sprintf(status, "%c%s%s",
c127b45b	492	target_p->user->away ? 'G' : 'H', IsOper(target_p) ? "*" : "", msptr ? find_channel_status(msptr, fmt->fields \|\| IsCapable(source_p, CLICAP_MULTI_PREFIX)) : "");
212380e3	493
48957a49 JT	494	if (fmt->fields == 0)
48957a49 JT	495	sendto_one(source_p, form_str(RPL_WHOREPLY), me.name,
02eca3f1	496	source_p->name, msptr ? msptr->chptr->chname : "*",
48957a49 JT	497	target_p->username, target_p->host,
48957a49 JT	498	target_p->servptr->name, target_p->name, status,
55abcbb2	499	ConfigServerHide.flatten_links && !IsOper(source_p) && !IsExemptShide(source_p) ? 0 : target_p->hopcount,
48957a49 JT	500	target_p->info);
	501	else
	502	{
	503	str[0] = '\0';
bac250f6 JT	504	pos = 0;
	505	append_format(str, sizeof str, &pos, ":%s %d %s",
	506	me.name, RPL_WHOSPCRPL, source_p->name);
48957a49	507	if (fmt->fields & FIELD_QUERYTYPE)
bac250f6	508	append_format(str, sizeof str, &pos, " %s", fmt->querytype);
48957a49	509	if (fmt->fields & FIELD_CHANNEL)
bac250f6	510	append_format(str, sizeof str, &pos, " %s", msptr ? msptr->chptr->chname : "*");
48957a49	511	if (fmt->fields & FIELD_USER)
bac250f6	512	append_format(str, sizeof str, &pos, " %s", target_p->username);
48957a49 JT	513	if (fmt->fields & FIELD_IP)
	514	{
	515	if (show_ip(source_p, target_p) && !EmptyString(target_p->sockhost) && strcmp(target_p->sockhost, "0"))
bac250f6	516	append_format(str, sizeof str, &pos, " %s", target_p->sockhost);
48957a49	517	else
bac250f6	518	append_format(str, sizeof str, &pos, " %s", "255.255.255.255");
48957a49 JT	519	}
48957a49 JT	520	if (fmt->fields & FIELD_HOST)
bac250f6	521	append_format(str, sizeof str, &pos, " %s", target_p->host);
48957a49	522	if (fmt->fields & FIELD_SERVER)
bac250f6	523	append_format(str, sizeof str, &pos, " %s", target_p->servptr->name);
48957a49	524	if (fmt->fields & FIELD_NICK)
bac250f6	525	append_format(str, sizeof str, &pos, " %s", target_p->name);
48957a49	526	if (fmt->fields & FIELD_FLAGS)
bac250f6	527	append_format(str, sizeof str, &pos, " %s", status);
48957a49	528	if (fmt->fields & FIELD_HOP)
9a7ab95b	529	append_format(str, sizeof str, &pos, " %d", ConfigServerHide.flatten_links && !IsOper(source_p) && !IsExemptShide(source_p) ? 0 : target_p->hopcount);
48957a49	530	if (fmt->fields & FIELD_IDLE)
bac250f6	531	append_format(str, sizeof str, &pos, " %d", (int)(MyClient(target_p) ? rb_current_time() - target_p->localClient->last : 0));
48957a49 JT	532	if (fmt->fields & FIELD_ACCOUNT)
	533	{
	534	/* display as in whois */
	535	q = target_p->user->suser;
	536	if (!EmptyString(q))
	537	{
	538	while(IsDigit(*q))
	539	q++;
	540	if(*q == '\0')
	541	q = target_p->user->suser;
	542	}
	543	else
	544	q = "0";
bac250f6	545	append_format(str, sizeof str, &pos, " %s", q);
48957a49 JT	546	}
48957a49 JT	547	if (fmt->fields & FIELD_OPLEVEL)
bac250f6	548	append_format(str, sizeof str, &pos, " %s", is_chanop(msptr) ? "999" : "n/a");
48957a49	549	if (fmt->fields & FIELD_INFO)
bac250f6 JT	550	append_format(str, sizeof str, &pos, " :%s", target_p->info);
	551
	552	if (pos >= sizeof str)
	553	{
3c7d6fcc	554	static bool warned = false;
bac250f6 JT	555	if (!warned)
	556	sendto_realops_snomask(SNO_DEBUG, L_NETWIDE,
	557	"WHOX overflow while sending information about %s to %s",
	558	target_p->name, source_p->name);
3c7d6fcc	559	warned = true;
bac250f6 JT	560	}
bac250f6 JT	561	sendto_one(source_p, "%s", str);
48957a49	562	}
212380e3	563	}