1 /*
2  * Copyright (c) 2022 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "config.h"
18 
19 #if HAVE_SO_SPLICE
20 
21 #include <sys/socket.h>
22 
23 #include "log.h"
24 #include "lstun.h"
25 
26 static void
27 splice_done(int fd, short ev, void *data)
28 {
29 	struct conn *c = data;
30 
31 	log_info("closing connection (event=%x)", ev);
32 	conn_free(c);
33 }
34 
35 int
36 conn_splice(struct conn *c)
37 {
38 	if (setsockopt(c->source, SOL_SOCKET, SO_SPLICE, &c->to, sizeof(int))
39 	    == -1)
40 		return -1;
41 	if (setsockopt(c->to, SOL_SOCKET, SO_SPLICE, &c->source, sizeof(int))
42 	    == -1)
43 		return -1;
44 
45 	event_once(c->source, EV_READ, splice_done, c, NULL);
46 	return 0;
47 }
48 
49 #endif	/* HAVE_SO_SPLICE */