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 nopcb(struct bufferevent *bev, void *d)
28 {
29 	return;
30 }
31 
32 static void
33 sreadcb(struct bufferevent *bev, void *d)
34 {
35 	struct conn *c = d;
36 
37 	bufferevent_write_buffer(c->tobev, EVBUFFER_INPUT(bev));
38 }
39 
40 static void
41 treadcb(struct bufferevent *bev, void *d)
42 {
43 	struct conn *c = d;
44 
45 	bufferevent_write_buffer(c->sourcebev, EVBUFFER_INPUT(bev));
46 }
47 
48 static void
49 errcb(struct bufferevent *bev, short event, void *d)
50 {
51 	struct conn *c = d;
52 
53 	log_info("closing connection (event=%x)", event);
54 	conn_free(c);
55 }
56 
57 int
58 conn_splice(struct conn *c)
59 {
60 	c->sourcebev = bufferevent_new(c->source, sreadcb, nopcb, errcb, c);
61 	c->tobev = bufferevent_new(c->to, treadcb, nopcb, errcb, c);
62 
63 	if (c->sourcebev == NULL || c->tobev == NULL) {
64 		log_warn("bufferevent_new");
65 		return -1;
66 	}
67 
68 	bufferevent_enable(c->sourcebev, EV_READ|EV_WRITE);
69 	bufferevent_enable(c->tobev, EV_READ|EV_WRITE);
70 	return 0;
71 }
72 
73 #endif	/* !HAVE_SO_SPLICE */