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jfr.im git - solanum.git/blob - modules/m_cap.c
3 * Copyright (C) 2005 Lee Hardy <lee@leeh.co.uk>
4 * Copyright (C) 2005 ircd-ratbox development team
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
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.
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.
30 * $Id: m_cap.c 676 2006-02-03 20:05:09Z gxti $
45 typedef int (*bqcmp
)(const void *, const void *);
47 static int m_cap(struct Client
*, struct Client
*, int, const char **);
48 static int modinit(void);
50 struct Message cap_msgtab
= {
51 "CAP", 0, 0, 0, MFLG_SLOW
,
52 {{m_cap
, 2}, {m_cap
, 2}, mg_ignore
, mg_ignore
, mg_ignore
, {m_cap
, 2}}
55 mapi_clist_av1 cap_clist
[] = { &cap_msgtab
, NULL
};
56 DECLARE_MODULE_AV1(cap
, modinit
, NULL
, cap_clist
, NULL
, NULL
, "$Revision: 676 $");
58 #define _CLICAP(name, capserv, capclient, flags) \
59 { (name), (capserv), (capclient), (flags), sizeof(name) - 1 }
61 #define CLICAP_FLAGS_STICKY 0x001
66 int cap_serv
; /* for altering s->c */
67 int cap_cli
; /* for altering c->s */
71 _CLICAP("multi-prefix", CLICAP_MULTI_PREFIX
, 0, 0),
72 _CLICAP("sasl", CLICAP_SASL
, 0, 0),
73 _CLICAP("account-notify", CLICAP_ACCOUNT_NOTIFY
, 0, 0),
74 _CLICAP("extended-join", CLICAP_EXTENDED_JOIN
, 0, 0),
75 _CLICAP("away-notify", CLICAP_AWAY_NOTIFY
, 0, 0),
76 _CLICAP("tls", CLICAP_TLS
, 0, 0),
79 #define CLICAP_LIST_LEN (sizeof(clicap_list) / sizeof(struct clicap))
81 static int clicap_sort(struct clicap
*, struct clicap
*);
86 qsort(clicap_list
, CLICAP_LIST_LEN
, sizeof(struct clicap
),
92 clicap_sort(struct clicap
*one
, struct clicap
*two
)
94 return irccmp(one
->name
, two
->name
);
98 clicap_compare(const char *name
, struct clicap
*cap
)
100 return irccmp(name
, cap
->name
);
104 * Used iteratively over a buffer, extracts individual cap tokens.
106 * Inputs: buffer to start iterating over (NULL to iterate over existing buf)
107 * int pointer to whether the cap token is negated
108 * int pointer to whether we finish with success
109 * Ouputs: Cap entry if found, NULL otherwise.
111 static struct clicap
*
112 clicap_find(const char *data
, int *negate
, int *finished
)
114 static char buf
[BUFSIZE
];
123 rb_strlcpy(buf
, data
, sizeof(buf
));
130 /* skip any whitespace */
131 while(*p
&& IsSpace(*p
))
145 /* someone sent a '-' without a parameter.. */
150 if((s
= strchr(p
, ' ')))
153 if((cap
= bsearch(p
, clicap_list
, CLICAP_LIST_LEN
,
154 sizeof(struct clicap
), (bqcmp
) clicap_compare
)))
166 * Generates a list of capabilities.
168 * Inputs: client to send to, subcmd to send,
169 * flags to match against: 0 to do none, -1 if client has no flags,
170 * int to whether we are doing CAP CLEAR
174 clicap_generate(struct Client
*source_p
, const char *subcmd
, int flags
, int clear
)
177 char capbuf
[BUFSIZE
];
183 mlen
= rb_sprintf(buf
, ":%s CAP %s %s",
185 EmptyString(source_p
->name
) ? "*" : source_p
->name
,
191 /* shortcut, nothing to do */
194 sendto_one(source_p
, "%s :", buf
);
198 for(i
= 0; i
< CLICAP_LIST_LEN
; i
++)
202 if(!IsCapable(source_p
, clicap_list
[i
].cap_serv
))
204 /* they are capable of this, check sticky */
205 else if(clear
&& clicap_list
[i
].flags
& CLICAP_FLAGS_STICKY
)
209 /* \r\n\0, possible "-~=", space, " *" */
210 if(buflen
+ clicap_list
[i
].namelen
>= BUFSIZE
- 10)
212 /* remove our trailing space -- if buflen == mlen
213 * here, we didnt even succeed in adding one.
220 sendto_one(source_p
, "%s * :%s", buf
, capbuf
);
230 /* needs a client ack */
231 if(clicap_list
[i
].cap_cli
&&
232 IsCapable(source_p
, clicap_list
[i
].cap_cli
))
240 if(clicap_list
[i
].flags
& CLICAP_FLAGS_STICKY
)
246 /* if we're doing an LS, then we only send this if
249 if(clicap_list
[i
].cap_cli
&&
250 (!flags
|| !IsCapable(source_p
, clicap_list
[i
].cap_cli
)))
257 curlen
= rb_sprintf(p
, "%s ", clicap_list
[i
].name
);
262 /* remove trailing space */
268 sendto_one(source_p
, "%s :%s", buf
, capbuf
);
272 cap_ack(struct Client
*source_p
, const char *arg
)
275 int capadd
= 0, capdel
= 0;
276 int finished
= 0, negate
;
281 for(cap
= clicap_find(arg
, &negate
, &finished
); cap
;
282 cap
= clicap_find(NULL
, &negate
, &finished
))
284 /* sent an ACK for something they havent REQd */
285 if(!IsCapable(source_p
, cap
->cap_serv
))
290 /* dont let them ack something sticky off */
291 if(cap
->flags
& CLICAP_FLAGS_STICKY
)
294 capdel
|= cap
->cap_cli
;
297 capadd
|= cap
->cap_cli
;
300 source_p
->localClient
->caps
|= capadd
;
301 source_p
->localClient
->caps
&= ~capdel
;
305 cap_clear(struct Client
*source_p
, const char *arg
)
307 clicap_generate(source_p
, "ACK",
308 source_p
->localClient
->caps
? source_p
->localClient
->caps
: -1, 1);
310 /* XXX - sticky capabs */
312 source_p
->localClient
->caps
= source_p
->localClient
->caps
& CLICAP_STICKY
;
314 source_p
->localClient
->caps
= 0;
319 cap_end(struct Client
*source_p
, const char *arg
)
321 if(IsRegistered(source_p
))
324 source_p
->flags
&= ~FLAGS_CLICAP
;
326 if(source_p
->name
[0] && source_p
->flags
& FLAGS_SENTUSER
)
329 rb_strlcpy(buf
, source_p
->username
, sizeof(buf
));
330 register_local_user(source_p
, source_p
, buf
);
335 cap_list(struct Client
*source_p
, const char *arg
)
337 /* list of what theyre currently using */
338 clicap_generate(source_p
, "LIST",
339 source_p
->localClient
->caps
? source_p
->localClient
->caps
: -1, 0);
343 cap_ls(struct Client
*source_p
, const char *arg
)
345 if(!IsRegistered(source_p
))
346 source_p
->flags
|= FLAGS_CLICAP
;
348 /* list of what we support */
349 clicap_generate(source_p
, "LS", 0, 0);
353 cap_req(struct Client
*source_p
, const char *arg
)
356 char pbuf
[2][BUFSIZE
];
360 int capadd
= 0, capdel
= 0;
361 int finished
= 0, negate
;
363 if(!IsRegistered(source_p
))
364 source_p
->flags
|= FLAGS_CLICAP
;
369 buflen
= rb_snprintf(buf
, sizeof(buf
), ":%s CAP %s ACK",
370 me
.name
, EmptyString(source_p
->name
) ? "*" : source_p
->name
);
375 for(cap
= clicap_find(arg
, &negate
, &finished
); cap
;
376 cap
= clicap_find(NULL
, &negate
, &finished
))
378 /* filled the first array, but cant send it in case the
379 * request fails. one REQ should never fill more than two
382 if(buflen
+ plen
+ cap
->namelen
+ 6 >= BUFSIZE
)
391 if(cap
->flags
& CLICAP_FLAGS_STICKY
)
397 strcat(pbuf
[i
], "-");
400 capdel
|= cap
->cap_serv
;
404 if(cap
->flags
& CLICAP_FLAGS_STICKY
)
406 strcat(pbuf
[i
], "=");
410 capadd
|= cap
->cap_serv
;
415 strcat(pbuf
[i
], "~");
419 strcat(pbuf
[i
], cap
->name
);
420 strcat(pbuf
[i
], " ");
421 plen
+= (cap
->namelen
+ 1);
426 sendto_one(source_p
, ":%s CAP %s NAK :%s",
427 me
.name
, EmptyString(source_p
->name
) ? "*" : source_p
->name
, arg
);
433 sendto_one(source_p
, "%s * :%s", buf
, pbuf
[0]);
434 sendto_one(source_p
, "%s :%s", buf
, pbuf
[1]);
437 sendto_one(source_p
, "%s :%s", buf
, pbuf
[0]);
439 source_p
->localClient
->caps
|= capadd
;
440 source_p
->localClient
->caps
&= ~capdel
;
443 static struct clicap_cmd
446 void (*func
)(struct Client
*source_p
, const char *arg
);
447 } clicap_cmdlist
[] = {
448 /* This list *MUST* be in alphabetical order */
450 { "CLEAR", cap_clear
},
452 { "LIST", cap_list
},
458 clicap_cmd_search(const char *command
, struct clicap_cmd
*entry
)
460 return irccmp(command
, entry
->cmd
);
464 m_cap(struct Client
*client_p
, struct Client
*source_p
, int parc
, const char *parv
[])
466 struct clicap_cmd
*cmd
;
468 if(!(cmd
= bsearch(parv
[1], clicap_cmdlist
,
469 sizeof(clicap_cmdlist
) / sizeof(struct clicap_cmd
),
470 sizeof(struct clicap_cmd
), (bqcmp
) clicap_cmd_search
)))
472 sendto_one(source_p
, form_str(ERR_INVALIDCAPCMD
),
473 me
.name
, EmptyString(source_p
->name
) ? "*" : source_p
->name
,
478 (cmd
->func
)(source_p
, parv
[2]);