[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"
#include "s_conf.h"
#include "hash.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, CLICAP_FLAGS_STICKY),
	_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),
	_CLICAP("userhost-in-names", CLICAP_USERHOST_IN_NAMES, 0, 0, 0),
	_CLICAP("cap-notify", CLICAP_CAP_NOTIFY, 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;
		}

		if (clicap_list[i].cap_serv == CLICAP_SASL)
		{
			struct Client *agent_p = NULL;

			if (!ConfigFileEntry.sasl_service)
				continue;

			agent_p = find_named_client(ConfigFileEntry.sasl_service);
			if (agent_p == NULL || !IsService(agent_p))
				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++;
		}

		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->cap_serv == CLICAP_SASL)
			{
				struct Client *agent_p = NULL;

				if (!ConfigFileEntry.sasl_service)
				{
					finished = 0;
					break;
				}

				agent_p = find_named_client(ConfigFileEntry.sasl_service);
				if (agent_p == NULL || !IsService(agent_p))
				{
					finished = 0;
					break;
				}
			}

			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"
bbce62d2	45	#include "s_conf.h"
dafbd7fa	46	#include "hash.h"
212380e3 AC	47
	48	typedef int (bqcmp)(const void , const void *);
	49
	50	static int m_cap(struct Client , struct Client , int, const char **);
	51	static int modinit(void);
	52
	53	struct Message cap_msgtab = {
	54	"CAP", 0, 0, 0, MFLG_SLOW,
	55	{{m_cap, 2}, {m_cap, 2}, mg_ignore, mg_ignore, mg_ignore, {m_cap, 2}}
	56	};
	57
	58	mapi_clist_av1 cap_clist[] = { &cap_msgtab, NULL };
	59	DECLARE_MODULE_AV1(cap, modinit, NULL, cap_clist, NULL, NULL, "$Revision: 676 $");
	60
0044d400 AC	61	#define _CLICAP(name, capserv, capclient, caprequired, flags) \
0044d400 AC	62	{ (name), (capserv), (capclient), (caprequired), (flags), sizeof(name) - 1 }
212380e3 AC	63
	64	#define CLICAP_FLAGS_STICKY 0x001
	65
	66	static struct clicap
	67	{
	68	const char *name;
	69	int cap_serv; /* for altering s->c */
	70	int cap_cli; /* for altering c->s */
0044d400	71	int cap_required_serv; /* required dependency cap */
212380e3 AC	72	int flags;
	73	int namelen;
	74	} clicap_list[] = {
0044d400	75	_CLICAP("multi-prefix", CLICAP_MULTI_PREFIX, 0, 0, 0),
aaaf9faf	76	_CLICAP("sasl", CLICAP_SASL, 0, 0, CLICAP_FLAGS_STICKY),
0044d400 AC	77	_CLICAP("account-notify", CLICAP_ACCOUNT_NOTIFY, 0, 0, 0),
	78	_CLICAP("extended-join", CLICAP_EXTENDED_JOIN, 0, 0, 0),
	79	_CLICAP("away-notify", CLICAP_AWAY_NOTIFY, 0, 0, 0),
	80	_CLICAP("tls", CLICAP_TLS, 0, 0, 0),
1b54aa5c	81	_CLICAP("userhost-in-names", CLICAP_USERHOST_IN_NAMES, 0, 0, 0),
13de7083	82	_CLICAP("cap-notify", CLICAP_CAP_NOTIFY, 0, 0, 0),
212380e3 AC	83	};
	84
	85	#define CLICAP_LIST_LEN (sizeof(clicap_list) / sizeof(struct clicap))
	86
	87	static int clicap_sort(struct clicap , struct clicap );
	88
	89	static int
	90	modinit(void)
	91	{
	92	qsort(clicap_list, CLICAP_LIST_LEN, sizeof(struct clicap),
	93	(bqcmp) clicap_sort);
	94	return 0;
	95	}
	96
	97	static int
	98	clicap_sort(struct clicap one, struct clicap two)
	99	{
	100	return irccmp(one->name, two->name);
	101	}
	102
	103	static int
	104	clicap_compare(const char name, struct clicap cap)
	105	{
	106	return irccmp(name, cap->name);
	107	}
	108
	109	/* clicap_find()
	110	* Used iteratively over a buffer, extracts individual cap tokens.
	111	*
	112	* Inputs: buffer to start iterating over (NULL to iterate over existing buf)
	113	* int pointer to whether the cap token is negated
	114	* int pointer to whether we finish with success
	115	* Ouputs: Cap entry if found, NULL otherwise.
	116	*/
	117	static struct clicap *
	118	clicap_find(const char data, int negate, int *finished)
	119	{
	120	static char buf[BUFSIZE];
	121	static char *p;
	122	struct clicap *cap;
	123	char *s;
	124
	125	*negate = 0;
	126
	127	if(data)
	128	{
f427c8b0	129	rb_strlcpy(buf, data, sizeof(buf));
212380e3 AC	130	p = buf;
	131	}
	132
	133	if(*finished)
	134	return NULL;
	135
	136	/* skip any whitespace */
	137	while(p && IsSpace(p))
	138	p++;
	139
	140	if(EmptyString(p))
	141	{
	142	*finished = 1;
	143	return NULL;
	144	}
	145
	146	if(*p == '-')
	147	{
	148	*negate = 1;
	149	p++;
	150
	151	/* someone sent a '-' without a parameter.. */
	152	if(*p == '\0')
	153	return NULL;
	154	}
	155
	156	if((s = strchr(p, ' ')))
	157	*s++ = '\0';
	158
55abcbb2	159	if((cap = bsearch(p, clicap_list, CLICAP_LIST_LEN,
212380e3 AC	160	sizeof(struct clicap), (bqcmp) clicap_compare)))
	161	{
	162	if(s)
	163	p = s;
	164	else
	165	*finished = 1;
	166	}
	167
	168	return cap;
	169	}
	170
	171	/* clicap_generate()
	172	* Generates a list of capabilities.
	173	*
	174	* Inputs: client to send to, subcmd to send,
	175	* flags to match against: 0 to do none, -1 if client has no flags,
	176	* int to whether we are doing CAP CLEAR
	177	* Outputs: None
	178	*/
	179	static void
	180	clicap_generate(struct Client source_p, const char subcmd, int flags, int clear)
	181	{
	182	char buf[BUFSIZE];
	183	char capbuf[BUFSIZE];
	184	char *p;
	185	int buflen = 0;
	186	int curlen, mlen;
34e02db6	187	size_t i;
212380e3	188
7cdb0a09	189	mlen = rb_sprintf(buf, ":%s CAP %s %s",
55abcbb2 KB	190	me.name,
55abcbb2 KB	191	EmptyString(source_p->name) ? "*" : source_p->name,
212380e3 AC	192	subcmd);
	193
	194	p = capbuf;
	195	buflen = mlen;
	196
	197	/* shortcut, nothing to do */
	198	if(flags == -1)
	199	{
	200	sendto_one(source_p, "%s :", buf);
	201	return;
	202	}
	203
	204	for(i = 0; i < CLICAP_LIST_LEN; i++)
	205	{
	206	if(flags)
	207	{
	208	if(!IsCapable(source_p, clicap_list[i].cap_serv))
	209	continue;
	210	/* they are capable of this, check sticky */
	211	else if(clear && clicap_list[i].flags & CLICAP_FLAGS_STICKY)
	212	continue;
	213	}
	214
bbce62d2 MT	215	if (clicap_list[i].cap_serv == CLICAP_SASL)
	216	{
	217	struct Client *agent_p = NULL;
	218
	219	if (!ConfigFileEntry.sasl_service)
	220	continue;
	221
	222	agent_p = find_named_client(ConfigFileEntry.sasl_service);
	223	if (agent_p == NULL \|\| !IsService(agent_p))
	224	continue;
	225	}
	226
212380e3 AC	227	/* \r\n\0, possible "-~=", space, " " /
	228	if(buflen + clicap_list[i].namelen >= BUFSIZE - 10)
	229	{
	230	/* remove our trailing space -- if buflen == mlen
	231	* here, we didnt even succeed in adding one.
	232	*/
	233	if(buflen != mlen)
	234	*(p - 1) = '\0';
	235	else
	236	*p = '\0';
	237
	238	sendto_one(source_p, "%s * :%s", buf, capbuf);
	239	p = capbuf;
	240	buflen = mlen;
	241	}
	242
	243	if(clear)
	244	{
	245	*p++ = '-';
	246	buflen++;
212380e3 AC	247	}
212380e3 AC	248
7cdb0a09	249	curlen = rb_sprintf(p, "%s ", clicap_list[i].name);
212380e3 AC	250	p += curlen;
	251	buflen += curlen;
	252	}
	253
	254	/* remove trailing space */
	255	if(buflen != mlen)
	256	*(p - 1) = '\0';
	257	else
	258	*p = '\0';
	259
	260	sendto_one(source_p, "%s :%s", buf, capbuf);
	261	}
	262
	263	static void
	264	cap_ack(struct Client source_p, const char arg)
	265	{
	266	struct clicap *cap;
	267	int capadd = 0, capdel = 0;
	268	int finished = 0, negate;
	269
	270	if(EmptyString(arg))
	271	return;
	272
	273	for(cap = clicap_find(arg, &negate, &finished); cap;
	274	cap = clicap_find(NULL, &negate, &finished))
	275	{
	276	/* sent an ACK for something they havent REQd */
	277	if(!IsCapable(source_p, cap->cap_serv))
	278	continue;
	279
	280	if(negate)
	281	{
	282	/* dont let them ack something sticky off */
	283	if(cap->flags & CLICAP_FLAGS_STICKY)
	284	continue;
	285
	286	capdel \|= cap->cap_cli;
	287	}
	288	else
	289	capadd \|= cap->cap_cli;
	290	}
	291
	292	source_p->localClient->caps \|= capadd;
	293	source_p->localClient->caps &= ~capdel;
	294	}
	295
	296	static void
	297	cap_clear(struct Client source_p, const char arg)
	298	{
55abcbb2	299	clicap_generate(source_p, "ACK",
212380e3 AC	300	source_p->localClient->caps ? source_p->localClient->caps : -1, 1);
	301
	302	/* XXX - sticky capabs */
	303	#ifdef CLICAP_STICKY
	304	source_p->localClient->caps = source_p->localClient->caps & CLICAP_STICKY;
	305	#else
	306	source_p->localClient->caps = 0;
	307	#endif
	308	}
	309
	310	static void
	311	cap_end(struct Client source_p, const char arg)
	312	{
	313	if(IsRegistered(source_p))
	314	return;
	315
095328a7	316	source_p->flags &= ~FLAGS_CLICAP;
212380e3	317
1fb3b1e1	318	if(source_p->name[0] && source_p->flags & FLAGS_SENTUSER)
212380e3 AC	319	{
212380e3 AC	320	char buf[USERLEN+1];
f427c8b0	321	rb_strlcpy(buf, source_p->username, sizeof(buf));
212380e3 AC	322	register_local_user(source_p, source_p, buf);
	323	}
	324	}
	325
	326	static void
	327	cap_list(struct Client source_p, const char arg)
	328	{
	329	/* list of what theyre currently using */
	330	clicap_generate(source_p, "LIST",
	331	source_p->localClient->caps ? source_p->localClient->caps : -1, 0);
	332	}
	333
	334	static void
	335	cap_ls(struct Client source_p, const char arg)
	336	{
	337	if(!IsRegistered(source_p))
095328a7	338	source_p->flags \|= FLAGS_CLICAP;
212380e3 AC	339
	340	/* list of what we support */
	341	clicap_generate(source_p, "LS", 0, 0);
	342	}
	343
	344	static void
	345	cap_req(struct Client source_p, const char arg)
	346	{
	347	char buf[BUFSIZE];
	348	char pbuf[2][BUFSIZE];
	349	struct clicap *cap;
	350	int buflen, plen;
	351	int i = 0;
	352	int capadd = 0, capdel = 0;
	353	int finished = 0, negate;
	354
	355	if(!IsRegistered(source_p))
095328a7	356	source_p->flags \|= FLAGS_CLICAP;
212380e3 AC	357
	358	if(EmptyString(arg))
	359	return;
	360
7cdb0a09	361	buflen = rb_snprintf(buf, sizeof(buf), ":%s CAP %s ACK",
212380e3 AC	362	me.name, EmptyString(source_p->name) ? "*" : source_p->name);
	363
	364	pbuf[0][0] = '\0';
	365	plen = 0;
	366
	367	for(cap = clicap_find(arg, &negate, &finished); cap;
	368	cap = clicap_find(NULL, &negate, &finished))
	369	{
	370	/* filled the first array, but cant send it in case the
	371	* request fails. one REQ should never fill more than two
	372	* buffers --fl
	373	*/
	374	if(buflen + plen + cap->namelen + 6 >= BUFSIZE)
	375	{
	376	pbuf[1][0] = '\0';
	377	plen = 0;
	378	i = 1;
	379	}
	380
	381	if(negate)
	382	{
	383	if(cap->flags & CLICAP_FLAGS_STICKY)
	384	{
	385	finished = 0;
	386	break;
	387	}
	388
	389	strcat(pbuf[i], "-");
	390	plen++;
	391
	392	capdel \|= cap->cap_serv;
	393	}
	394	else
	395	{
3a48406b	396	if(cap->cap_required_serv && !((capadd & cap->cap_required_serv) == cap->cap_required_serv \|\| IsCapable(source_p, cap->cap_required_serv)))
0044d400 AC	397	{
	398	finished = 0;
	399	break;
	400	}
	401
bbce62d2 MT	402	if (cap->cap_serv == CLICAP_SASL)
	403	{
	404	struct Client *agent_p = NULL;
	405
	406	if (!ConfigFileEntry.sasl_service)
	407	{
	408	finished = 0;
	409	break;
	410	}
	411
	412	agent_p = find_named_client(ConfigFileEntry.sasl_service);
	413	if (agent_p == NULL \|\| !IsService(agent_p))
	414	{
	415	finished = 0;
	416	break;
	417	}
	418	}
	419
212380e3 AC	420	capadd \|= cap->cap_serv;
	421	}
	422
	423	if(cap->cap_cli)
	424	{
	425	strcat(pbuf[i], "~");
	426	plen++;
	427	}
	428
	429	strcat(pbuf[i], cap->name);
	430	strcat(pbuf[i], " ");
	431	plen += (cap->namelen + 1);
	432	}
	433
	434	if(!finished)
	435	{
	436	sendto_one(source_p, ":%s CAP %s NAK :%s",
	437	me.name, EmptyString(source_p->name) ? "*" : source_p->name, arg);
	438	return;
	439	}
	440
	441	if(i)
	442	{
	443	sendto_one(source_p, "%s * :%s", buf, pbuf[0]);
	444	sendto_one(source_p, "%s :%s", buf, pbuf[1]);
	445	}
	446	else
	447	sendto_one(source_p, "%s :%s", buf, pbuf[0]);
	448
	449	source_p->localClient->caps \|= capadd;
	450	source_p->localClient->caps &= ~capdel;
	451	}
	452
	453	static struct clicap_cmd
	454	{
	455	const char *cmd;
	456	void (func)(struct Client source_p, const char *arg);
	457	} clicap_cmdlist[] = {
	458	/* This list MUST be in alphabetical order */
	459	{ "ACK", cap_ack },
	460	{ "CLEAR", cap_clear },
	461	{ "END", cap_end },
	462	{ "LIST", cap_list },
	463	{ "LS", cap_ls },
	464	{ "REQ", cap_req },
	465	};
	466
	467	static int
	468	clicap_cmd_search(const char command, struct clicap_cmd entry)
	469	{
	470	return irccmp(command, entry->cmd);
	471	}
	472
	473	static int
	474	m_cap(struct Client client_p, struct Client source_p, int parc, const char *parv[])
	475	{
	476	struct clicap_cmd *cmd;
	477
	478	if(!(cmd = bsearch(parv[1], clicap_cmdlist,
	479	sizeof(clicap_cmdlist) / sizeof(struct clicap_cmd),
	480	sizeof(struct clicap_cmd), (bqcmp) clicap_cmd_search)))
	481	{
	482	sendto_one(source_p, form_str(ERR_INVALIDCAPCMD),
48a038f4 JT	483	me.name, EmptyString(source_p->name) ? "*" : source_p->name,
48a038f4 JT	484	parv[1]);
212380e3 AC	485	return 0;
	486	}
	487
	488	(cmd->func)(source_p, parv[2]);
	489	return 0;
	490	}