[solanum.git] / modules / m_cap.c

/* modules/m_cap.c
 *
 *  Copyright (C) 2005 Lee Hardy <lee@leeh.co.uk>
 *  Copyright (C) 2005 ircd-ratbox development team
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * 1.Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * 2.Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * 3.The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * $Id: m_cap.c 676 2006-02-03 20:05:09Z gxti $
 */

#include "stdinc.h"
#include "class.h"
#include "client.h"
#include "match.h"
#include "ircd.h"
#include "numeric.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "s_serv.h"
#include "s_user.h"
#include "send.h"

typedef int (*bqcmp)(const void *, const void *);

static int m_cap(struct Client *, struct Client *, int, const char **);
static int modinit(void);

struct Message cap_msgtab = {
	"CAP", 0, 0, 0, MFLG_SLOW,
	{{m_cap, 2}, {m_cap, 2}, mg_ignore, mg_ignore, mg_ignore, {m_cap, 2}}
};

mapi_clist_av1 cap_clist[] = { &cap_msgtab, NULL };
DECLARE_MODULE_AV1(cap, modinit, NULL, cap_clist, NULL, NULL, "$Revision: 676 $");

#define _CLICAP(name, capserv, capclient, caprequired, flags)	\
	{ (name), (capserv), (capclient), (caprequired), (flags), sizeof(name) - 1 }

#define CLICAP_FLAGS_STICKY	0x001

static struct clicap
{
	const char *name;
	int cap_serv;		/* for altering s->c */
	int cap_cli;		/* for altering c->s */
	int cap_required_serv;	/* required dependency cap */
	int flags;
	int namelen;
} clicap_list[] = {
	_CLICAP("multi-prefix",	CLICAP_MULTI_PREFIX, 0, 0, 0),
	_CLICAP("sasl", CLICAP_SASL, 0, 0, 0),
	_CLICAP("sasl-reauth", CLICAP_SASL_REAUTH, 0, CLICAP_SASL, 0),
	_CLICAP("account-notify", CLICAP_ACCOUNT_NOTIFY, 0, 0, 0),
	_CLICAP("extended-join", CLICAP_EXTENDED_JOIN, 0, 0, 0),
	_CLICAP("away-notify", CLICAP_AWAY_NOTIFY, 0, 0, 0),
	_CLICAP("tls", CLICAP_TLS, 0, 0, 0),
};

#define CLICAP_LIST_LEN (sizeof(clicap_list) / sizeof(struct clicap))

static int clicap_sort(struct clicap *, struct clicap *);

static int
modinit(void)
{
	qsort(clicap_list, CLICAP_LIST_LEN, sizeof(struct clicap),
		(bqcmp) clicap_sort);
	return 0;
}

static int
clicap_sort(struct clicap *one, struct clicap *two)
{
	return irccmp(one->name, two->name);
}

static int
clicap_compare(const char *name, struct clicap *cap)
{
	return irccmp(name, cap->name);
}

/* clicap_find()
 *   Used iteratively over a buffer, extracts individual cap tokens.
 *
 * Inputs: buffer to start iterating over (NULL to iterate over existing buf)
 *         int pointer to whether the cap token is negated
 *         int pointer to whether we finish with success
 * Ouputs: Cap entry if found, NULL otherwise.
 */
static struct clicap *
clicap_find(const char *data, int *negate, int *finished)
{
	static char buf[BUFSIZE];
	static char *p;
	struct clicap *cap;
	char *s;

	*negate = 0;

	if(data)
	{
		rb_strlcpy(buf, data, sizeof(buf));
		p = buf;
	}

	if(*finished)
		return NULL;

	/* skip any whitespace */
	while(*p && IsSpace(*p))
		p++;

	if(EmptyString(p))
	{
		*finished = 1;
		return NULL;
	}

	if(*p == '-')
	{
		*negate = 1;
		p++;

		/* someone sent a '-' without a parameter.. */
		if(*p == '\0')
			return NULL;
	}

	if((s = strchr(p, ' ')))
		*s++ = '\0';

	if((cap = bsearch(p, clicap_list, CLICAP_LIST_LEN,
				sizeof(struct clicap), (bqcmp) clicap_compare)))
	{
		if(s)
			p = s;
		else
			*finished = 1;
	}

	return cap;
}

/* clicap_generate()
 *   Generates a list of capabilities.
 *
 * Inputs: client to send to, subcmd to send,
 *         flags to match against: 0 to do none, -1 if client has no flags,
 *         int to whether we are doing CAP CLEAR
 * Outputs: None
 */
static void
clicap_generate(struct Client *source_p, const char *subcmd, int flags, int clear)
{
	char buf[BUFSIZE];
	char capbuf[BUFSIZE];
	char *p;
	int buflen = 0;
	int curlen, mlen;
	size_t i;

	mlen = rb_sprintf(buf, ":%s CAP %s %s",
			me.name,
			EmptyString(source_p->name) ? "*" : source_p->name,
			subcmd);

	p = capbuf;
	buflen = mlen;

	/* shortcut, nothing to do */
	if(flags == -1)
	{
		sendto_one(source_p, "%s :", buf);
		return;
	}

	for(i = 0; i < CLICAP_LIST_LEN; i++)
	{
		if(flags)
		{
			if(!IsCapable(source_p, clicap_list[i].cap_serv))
				continue;
			/* they are capable of this, check sticky */
			else if(clear && clicap_list[i].flags & CLICAP_FLAGS_STICKY)
				continue;
		}

		/* \r\n\0, possible "-~=", space, " *" */
		if(buflen + clicap_list[i].namelen >= BUFSIZE - 10)
		{
			/* remove our trailing space -- if buflen == mlen
			 * here, we didnt even succeed in adding one.
			 */
			if(buflen != mlen)
				*(p - 1) = '\0';
			else
				*p = '\0';

			sendto_one(source_p, "%s * :%s", buf, capbuf);
			p = capbuf;
			buflen = mlen;
		}

		if(clear)
		{
			*p++ = '-';
			buflen++;

			/* needs a client ack */
			if(clicap_list[i].cap_cli &&
			   IsCapable(source_p, clicap_list[i].cap_cli))
			{
				*p++ = '~';
				buflen++;
			}
		}
		else
		{
			if(clicap_list[i].flags & CLICAP_FLAGS_STICKY)
			{
				*p++ = '=';
				buflen++;
			}

			/* if we're doing an LS, then we only send this if
			 * they havent ack'd
			 */
			if(clicap_list[i].cap_cli &&
			   (!flags || !IsCapable(source_p, clicap_list[i].cap_cli)))
			{
				*p++ = '~';
				buflen++;
			}
		}

		curlen = rb_sprintf(p, "%s ", clicap_list[i].name);
		p += curlen;
		buflen += curlen;
	}

	/* remove trailing space */
	if(buflen != mlen)
		*(p - 1) = '\0';
	else
		*p = '\0';

	sendto_one(source_p, "%s :%s", buf, capbuf);
}

static void
cap_ack(struct Client *source_p, const char *arg)
{
	struct clicap *cap;
	int capadd = 0, capdel = 0;
	int finished = 0, negate;

	if(EmptyString(arg))
		return;

	for(cap = clicap_find(arg, &negate, &finished); cap;
	    cap = clicap_find(NULL, &negate, &finished))
	{
		/* sent an ACK for something they havent REQd */
		if(!IsCapable(source_p, cap->cap_serv))
			continue;

		if(negate)
		{
			/* dont let them ack something sticky off */
			if(cap->flags & CLICAP_FLAGS_STICKY)
				continue;

			capdel |= cap->cap_cli;
		}
		else
			capadd |= cap->cap_cli;
	}

	source_p->localClient->caps |= capadd;
	source_p->localClient->caps &= ~capdel;
}

static void
cap_clear(struct Client *source_p, const char *arg)
{
	clicap_generate(source_p, "ACK",
			source_p->localClient->caps ? source_p->localClient->caps : -1, 1);

	/* XXX - sticky capabs */
#ifdef CLICAP_STICKY
	source_p->localClient->caps = source_p->localClient->caps & CLICAP_STICKY;
#else
	source_p->localClient->caps = 0;
#endif
}

static void
cap_end(struct Client *source_p, const char *arg)
{
	if(IsRegistered(source_p))
		return;

	source_p->flags &= ~FLAGS_CLICAP;

	if(source_p->name[0] && source_p->flags & FLAGS_SENTUSER)
	{
		char buf[USERLEN+1];
		rb_strlcpy(buf, source_p->username, sizeof(buf));
		register_local_user(source_p, source_p, buf);
	}
}

static void
cap_list(struct Client *source_p, const char *arg)
{
	/* list of what theyre currently using */
	clicap_generate(source_p, "LIST",
			source_p->localClient->caps ? source_p->localClient->caps : -1, 0);
}

static void
cap_ls(struct Client *source_p, const char *arg)
{
	if(!IsRegistered(source_p))
		source_p->flags |= FLAGS_CLICAP;

	/* list of what we support */
	clicap_generate(source_p, "LS", 0, 0);
}

static void
cap_req(struct Client *source_p, const char *arg)
{
	char buf[BUFSIZE];
	char pbuf[2][BUFSIZE];
	struct clicap *cap;
	int buflen, plen;
	int i = 0;
	int capadd = 0, capdel = 0;
	int finished = 0, negate;

	if(!IsRegistered(source_p))
		source_p->flags |= FLAGS_CLICAP;

	if(EmptyString(arg))
		return;

	buflen = rb_snprintf(buf, sizeof(buf), ":%s CAP %s ACK",
			me.name, EmptyString(source_p->name) ? "*" : source_p->name);

	pbuf[0][0] = '\0';
	plen = 0;

	for(cap = clicap_find(arg, &negate, &finished); cap;
	    cap = clicap_find(NULL, &negate, &finished))
	{
		/* filled the first array, but cant send it in case the
		 * request fails.  one REQ should never fill more than two
		 * buffers --fl
		 */
		if(buflen + plen + cap->namelen + 6 >= BUFSIZE)
		{
			pbuf[1][0] = '\0';
			plen = 0;
			i = 1;
		}

		if(negate)
		{
			if(cap->flags & CLICAP_FLAGS_STICKY)
			{
				finished = 0;
				break;
			}

			strcat(pbuf[i], "-");
			plen++;

			capdel |= cap->cap_serv;
		}
		else
		{
			if(cap->cap_required_serv && !((capadd & cap->cap_required_serv) == cap->cap_required_serv || IsCapable(source_p, cap->cap_required_serv)))
			{
				finished = 0;
				break;
			}

			if(cap->flags & CLICAP_FLAGS_STICKY)
			{
				strcat(pbuf[i], "=");
				plen++;
			}

			capadd |= cap->cap_serv;
		}

		if(cap->cap_cli)
		{
			strcat(pbuf[i], "~");
			plen++;
		}

		strcat(pbuf[i], cap->name);
		strcat(pbuf[i], " ");
		plen += (cap->namelen + 1);
	}

	if(!finished)
	{
		sendto_one(source_p, ":%s CAP %s NAK :%s",
			me.name, EmptyString(source_p->name) ? "*" : source_p->name, arg);
		return;
	}

	if(i)
	{
		sendto_one(source_p, "%s * :%s", buf, pbuf[0]);
		sendto_one(source_p, "%s :%s", buf, pbuf[1]);
	}
	else
		sendto_one(source_p, "%s :%s", buf, pbuf[0]);

	source_p->localClient->caps |= capadd;
	source_p->localClient->caps &= ~capdel;
}

static struct clicap_cmd
{
	const char *cmd;
	void (*func)(struct Client *source_p, const char *arg);
} clicap_cmdlist[] = {
	/* This list *MUST* be in alphabetical order */
	{ "ACK",	cap_ack		},
	{ "CLEAR",	cap_clear	},
	{ "END",	cap_end		},
	{ "LIST",	cap_list	},
	{ "LS",		cap_ls		},
	{ "REQ",	cap_req		},
};

static int
clicap_cmd_search(const char *command, struct clicap_cmd *entry)
{
	return irccmp(command, entry->cmd);
}

static int
m_cap(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
	struct clicap_cmd *cmd;

	if(!(cmd = bsearch(parv[1], clicap_cmdlist,
				sizeof(clicap_cmdlist) / sizeof(struct clicap_cmd),
				sizeof(struct clicap_cmd), (bqcmp) clicap_cmd_search)))
	{
		sendto_one(source_p, form_str(ERR_INVALIDCAPCMD),
				me.name, EmptyString(source_p->name) ? "*" : source_p->name,
				parv[1]);
		return 0;
	}

	(cmd->func)(source_p, parv[2]);
	return 0;
}
Commit	Line	Data
212380e3	1	/* modules/m_cap.c
55abcbb2	2	*
212380e3 AC	3	* Copyright (C) 2005 Lee Hardy <lee@leeh.co.uk>
	4	* Copyright (C) 2005 ircd-ratbox development team
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions are
	8	* met:
	9	*
	10	* 1.Redistributions of source code must retain the above copyright notice,
	11	* this list of conditions and the following disclaimer.
	12	* 2.Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 3.The name of the author may not be used to endorse or promote products
	16	* derived from this software without specific prior written permission.
	17	*
	18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	20	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	21	* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
	22	* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
	23	* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	24	* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	25	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	26	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	27	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	28	* POSSIBILITY OF SUCH DAMAGE.
	29	*
	30	* $Id: m_cap.c 676 2006-02-03 20:05:09Z gxti $
	31	*/
	32
	33	#include "stdinc.h"
212380e3 AC	34	#include "class.h"
212380e3 AC	35	#include "client.h"
4562c604	36	#include "match.h"
212380e3 AC	37	#include "ircd.h"
	38	#include "numeric.h"
	39	#include "msg.h"
	40	#include "parse.h"
	41	#include "modules.h"
	42	#include "s_serv.h"
	43	#include "s_user.h"
77d3d2db	44	#include "send.h"
212380e3 AC	45
	46	typedef int (bqcmp)(const void , const void *);
	47
	48	static int m_cap(struct Client , struct Client , int, const char **);
	49	static int modinit(void);
	50
	51	struct Message cap_msgtab = {
	52	"CAP", 0, 0, 0, MFLG_SLOW,
	53	{{m_cap, 2}, {m_cap, 2}, mg_ignore, mg_ignore, mg_ignore, {m_cap, 2}}
	54	};
	55
	56	mapi_clist_av1 cap_clist[] = { &cap_msgtab, NULL };
	57	DECLARE_MODULE_AV1(cap, modinit, NULL, cap_clist, NULL, NULL, "$Revision: 676 $");
	58
0044d400 AC	59	#define _CLICAP(name, capserv, capclient, caprequired, flags) \
0044d400 AC	60	{ (name), (capserv), (capclient), (caprequired), (flags), sizeof(name) - 1 }
212380e3 AC	61
	62	#define CLICAP_FLAGS_STICKY 0x001
	63
	64	static struct clicap
	65	{
	66	const char *name;
	67	int cap_serv; /* for altering s->c */
	68	int cap_cli; /* for altering c->s */
0044d400	69	int cap_required_serv; /* required dependency cap */
212380e3 AC	70	int flags;
	71	int namelen;
	72	} clicap_list[] = {
0044d400 AC	73	_CLICAP("multi-prefix", CLICAP_MULTI_PREFIX, 0, 0, 0),
0044d400 AC	74	_CLICAP("sasl", CLICAP_SASL, 0, 0, 0),
ef3ab8e3	75	_CLICAP("sasl-reauth", CLICAP_SASL_REAUTH, 0, CLICAP_SASL, 0),
0044d400 AC	76	_CLICAP("account-notify", CLICAP_ACCOUNT_NOTIFY, 0, 0, 0),
	77	_CLICAP("extended-join", CLICAP_EXTENDED_JOIN, 0, 0, 0),
	78	_CLICAP("away-notify", CLICAP_AWAY_NOTIFY, 0, 0, 0),
	79	_CLICAP("tls", CLICAP_TLS, 0, 0, 0),
212380e3 AC	80	};
	81
	82	#define CLICAP_LIST_LEN (sizeof(clicap_list) / sizeof(struct clicap))
	83
	84	static int clicap_sort(struct clicap , struct clicap );
	85
	86	static int
	87	modinit(void)
	88	{
	89	qsort(clicap_list, CLICAP_LIST_LEN, sizeof(struct clicap),
	90	(bqcmp) clicap_sort);
	91	return 0;
	92	}
	93
	94	static int
	95	clicap_sort(struct clicap one, struct clicap two)
	96	{
	97	return irccmp(one->name, two->name);
	98	}
	99
	100	static int
	101	clicap_compare(const char name, struct clicap cap)
	102	{
	103	return irccmp(name, cap->name);
	104	}
	105
	106	/* clicap_find()
	107	* Used iteratively over a buffer, extracts individual cap tokens.
	108	*
	109	* Inputs: buffer to start iterating over (NULL to iterate over existing buf)
	110	* int pointer to whether the cap token is negated
	111	* int pointer to whether we finish with success
	112	* Ouputs: Cap entry if found, NULL otherwise.
	113	*/
	114	static struct clicap *
	115	clicap_find(const char data, int negate, int *finished)
	116	{
	117	static char buf[BUFSIZE];
	118	static char *p;
	119	struct clicap *cap;
	120	char *s;
	121
	122	*negate = 0;
	123
	124	if(data)
	125	{
f427c8b0	126	rb_strlcpy(buf, data, sizeof(buf));
212380e3 AC	127	p = buf;
	128	}
	129
	130	if(*finished)
	131	return NULL;
	132
	133	/* skip any whitespace */
	134	while(p && IsSpace(p))
	135	p++;
	136
	137	if(EmptyString(p))
	138	{
	139	*finished = 1;
	140	return NULL;
	141	}
	142
	143	if(*p == '-')
	144	{
	145	*negate = 1;
	146	p++;
	147
	148	/* someone sent a '-' without a parameter.. */
	149	if(*p == '\0')
	150	return NULL;
	151	}
	152
	153	if((s = strchr(p, ' ')))
	154	*s++ = '\0';
	155
55abcbb2	156	if((cap = bsearch(p, clicap_list, CLICAP_LIST_LEN,
212380e3 AC	157	sizeof(struct clicap), (bqcmp) clicap_compare)))
	158	{
	159	if(s)
	160	p = s;
	161	else
	162	*finished = 1;
	163	}
	164
	165	return cap;
	166	}
	167
	168	/* clicap_generate()
	169	* Generates a list of capabilities.
	170	*
	171	* Inputs: client to send to, subcmd to send,
	172	* flags to match against: 0 to do none, -1 if client has no flags,
	173	* int to whether we are doing CAP CLEAR
	174	* Outputs: None
	175	*/
	176	static void
	177	clicap_generate(struct Client source_p, const char subcmd, int flags, int clear)
	178	{
	179	char buf[BUFSIZE];
	180	char capbuf[BUFSIZE];
	181	char *p;
	182	int buflen = 0;
	183	int curlen, mlen;
34e02db6	184	size_t i;
212380e3	185
7cdb0a09	186	mlen = rb_sprintf(buf, ":%s CAP %s %s",
55abcbb2 KB	187	me.name,
55abcbb2 KB	188	EmptyString(source_p->name) ? "*" : source_p->name,
212380e3 AC	189	subcmd);
	190
	191	p = capbuf;
	192	buflen = mlen;
	193
	194	/* shortcut, nothing to do */
	195	if(flags == -1)
	196	{
	197	sendto_one(source_p, "%s :", buf);
	198	return;
	199	}
	200
	201	for(i = 0; i < CLICAP_LIST_LEN; i++)
	202	{
	203	if(flags)
	204	{
	205	if(!IsCapable(source_p, clicap_list[i].cap_serv))
	206	continue;
	207	/* they are capable of this, check sticky */
	208	else if(clear && clicap_list[i].flags & CLICAP_FLAGS_STICKY)
	209	continue;
	210	}
	211
	212	/* \r\n\0, possible "-~=", space, " " /
	213	if(buflen + clicap_list[i].namelen >= BUFSIZE - 10)
	214	{
	215	/* remove our trailing space -- if buflen == mlen
	216	* here, we didnt even succeed in adding one.
	217	*/
	218	if(buflen != mlen)
	219	*(p - 1) = '\0';
	220	else
	221	*p = '\0';
	222
	223	sendto_one(source_p, "%s * :%s", buf, capbuf);
	224	p = capbuf;
	225	buflen = mlen;
	226	}
	227
	228	if(clear)
	229	{
	230	*p++ = '-';
	231	buflen++;
	232
	233	/* needs a client ack */
55abcbb2	234	if(clicap_list[i].cap_cli &&
212380e3 AC	235	IsCapable(source_p, clicap_list[i].cap_cli))
	236	{
	237	*p++ = '~';
	238	buflen++;
	239	}
	240	}
	241	else
	242	{
	243	if(clicap_list[i].flags & CLICAP_FLAGS_STICKY)
	244	{
	245	*p++ = '=';
	246	buflen++;
	247	}
	248
	249	/* if we're doing an LS, then we only send this if
	250	* they havent ack'd
	251	*/
	252	if(clicap_list[i].cap_cli &&
	253	(!flags \|\| !IsCapable(source_p, clicap_list[i].cap_cli)))
	254	{
	255	*p++ = '~';
	256	buflen++;
	257	}
	258	}
	259
7cdb0a09	260	curlen = rb_sprintf(p, "%s ", clicap_list[i].name);
212380e3 AC	261	p += curlen;
	262	buflen += curlen;
	263	}
	264
	265	/* remove trailing space */
	266	if(buflen != mlen)
	267	*(p - 1) = '\0';
	268	else
	269	*p = '\0';
	270
	271	sendto_one(source_p, "%s :%s", buf, capbuf);
	272	}
	273
	274	static void
	275	cap_ack(struct Client source_p, const char arg)
	276	{
	277	struct clicap *cap;
	278	int capadd = 0, capdel = 0;
	279	int finished = 0, negate;
	280
	281	if(EmptyString(arg))
	282	return;
	283
	284	for(cap = clicap_find(arg, &negate, &finished); cap;
	285	cap = clicap_find(NULL, &negate, &finished))
	286	{
	287	/* sent an ACK for something they havent REQd */
	288	if(!IsCapable(source_p, cap->cap_serv))
	289	continue;
	290
	291	if(negate)
	292	{
	293	/* dont let them ack something sticky off */
	294	if(cap->flags & CLICAP_FLAGS_STICKY)
	295	continue;
	296
	297	capdel \|= cap->cap_cli;
	298	}
	299	else
	300	capadd \|= cap->cap_cli;
	301	}
	302
	303	source_p->localClient->caps \|= capadd;
	304	source_p->localClient->caps &= ~capdel;
	305	}
	306
	307	static void
	308	cap_clear(struct Client source_p, const char arg)
	309	{
55abcbb2	310	clicap_generate(source_p, "ACK",
212380e3 AC	311	source_p->localClient->caps ? source_p->localClient->caps : -1, 1);
	312
	313	/* XXX - sticky capabs */
	314	#ifdef CLICAP_STICKY
	315	source_p->localClient->caps = source_p->localClient->caps & CLICAP_STICKY;
	316	#else
	317	source_p->localClient->caps = 0;
	318	#endif
	319	}
	320
	321	static void
	322	cap_end(struct Client source_p, const char arg)
	323	{
	324	if(IsRegistered(source_p))
	325	return;
	326
095328a7	327	source_p->flags &= ~FLAGS_CLICAP;
212380e3	328
1fb3b1e1	329	if(source_p->name[0] && source_p->flags & FLAGS_SENTUSER)
212380e3 AC	330	{
212380e3 AC	331	char buf[USERLEN+1];
f427c8b0	332	rb_strlcpy(buf, source_p->username, sizeof(buf));
212380e3 AC	333	register_local_user(source_p, source_p, buf);
	334	}
	335	}
	336
	337	static void
	338	cap_list(struct Client source_p, const char arg)
	339	{
	340	/* list of what theyre currently using */
	341	clicap_generate(source_p, "LIST",
	342	source_p->localClient->caps ? source_p->localClient->caps : -1, 0);
	343	}
	344
	345	static void
	346	cap_ls(struct Client source_p, const char arg)
	347	{
	348	if(!IsRegistered(source_p))
095328a7	349	source_p->flags \|= FLAGS_CLICAP;
212380e3 AC	350
	351	/* list of what we support */
	352	clicap_generate(source_p, "LS", 0, 0);
	353	}
	354
	355	static void
	356	cap_req(struct Client source_p, const char arg)
	357	{
	358	char buf[BUFSIZE];
	359	char pbuf[2][BUFSIZE];
	360	struct clicap *cap;
	361	int buflen, plen;
	362	int i = 0;
	363	int capadd = 0, capdel = 0;
	364	int finished = 0, negate;
	365
	366	if(!IsRegistered(source_p))
095328a7	367	source_p->flags \|= FLAGS_CLICAP;
212380e3 AC	368
	369	if(EmptyString(arg))
	370	return;
	371
7cdb0a09	372	buflen = rb_snprintf(buf, sizeof(buf), ":%s CAP %s ACK",
212380e3 AC	373	me.name, EmptyString(source_p->name) ? "*" : source_p->name);
	374
	375	pbuf[0][0] = '\0';
	376	plen = 0;
	377
	378	for(cap = clicap_find(arg, &negate, &finished); cap;
	379	cap = clicap_find(NULL, &negate, &finished))
	380	{
	381	/* filled the first array, but cant send it in case the
	382	* request fails. one REQ should never fill more than two
	383	* buffers --fl
	384	*/
	385	if(buflen + plen + cap->namelen + 6 >= BUFSIZE)
	386	{
	387	pbuf[1][0] = '\0';
	388	plen = 0;
	389	i = 1;
	390	}
	391
	392	if(negate)
	393	{
	394	if(cap->flags & CLICAP_FLAGS_STICKY)
	395	{
	396	finished = 0;
	397	break;
	398	}
	399
	400	strcat(pbuf[i], "-");
	401	plen++;
	402
	403	capdel \|= cap->cap_serv;
	404	}
	405	else
	406	{
3a48406b	407	if(cap->cap_required_serv && !((capadd & cap->cap_required_serv) == cap->cap_required_serv \|\| IsCapable(source_p, cap->cap_required_serv)))
0044d400 AC	408	{
	409	finished = 0;
	410	break;
	411	}
	412
212380e3 AC	413	if(cap->flags & CLICAP_FLAGS_STICKY)
	414	{
	415	strcat(pbuf[i], "=");
	416	plen++;
	417	}
	418
	419	capadd \|= cap->cap_serv;
	420	}
	421
	422	if(cap->cap_cli)
	423	{
	424	strcat(pbuf[i], "~");
	425	plen++;
	426	}
	427
	428	strcat(pbuf[i], cap->name);
	429	strcat(pbuf[i], " ");
	430	plen += (cap->namelen + 1);
	431	}
	432
	433	if(!finished)
	434	{
	435	sendto_one(source_p, ":%s CAP %s NAK :%s",
	436	me.name, EmptyString(source_p->name) ? "*" : source_p->name, arg);
	437	return;
	438	}
	439
	440	if(i)
	441	{
	442	sendto_one(source_p, "%s * :%s", buf, pbuf[0]);
	443	sendto_one(source_p, "%s :%s", buf, pbuf[1]);
	444	}
	445	else
	446	sendto_one(source_p, "%s :%s", buf, pbuf[0]);
	447
	448	source_p->localClient->caps \|= capadd;
	449	source_p->localClient->caps &= ~capdel;
	450	}
	451
	452	static struct clicap_cmd
	453	{
	454	const char *cmd;
	455	void (func)(struct Client source_p, const char *arg);
	456	} clicap_cmdlist[] = {
	457	/* This list MUST be in alphabetical order */
	458	{ "ACK", cap_ack },
	459	{ "CLEAR", cap_clear },
	460	{ "END", cap_end },
	461	{ "LIST", cap_list },
	462	{ "LS", cap_ls },
	463	{ "REQ", cap_req },
	464	};
	465
	466	static int
	467	clicap_cmd_search(const char command, struct clicap_cmd entry)
	468	{
	469	return irccmp(command, entry->cmd);
	470	}
	471
	472	static int
	473	m_cap(struct Client client_p, struct Client source_p, int parc, const char *parv[])
	474	{
	475	struct clicap_cmd *cmd;
	476
477	if(!(cmd = bsearch(parv[1], clicap_cmdlist,
478	sizeof(clicap_cmdlist) / sizeof(struct clicap_cmd),
479	sizeof(struct clicap_cmd), (bqcmp) clicap_cmd_search)))
480	{
481	sendto_one(source_p, form_str(ERR_INVALIDCAPCMD),
48a038f4 JT	482	me.name, EmptyString(source_p->name) ? "*" : source_p->name,
48a038f4 JT	483	parv[1]);
212380e3 AC	484	return 0;
	485	}
	486
	487	(cmd->func)(source_p, parv[2]);
	488	return 0;
	489	}