-
Notifications
You must be signed in to change notification settings - Fork 0
/
tunnel.c
137 lines (115 loc) · 4 KB
/
tunnel.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
/*
* Copyright (c) 2015 Justin Zhu, DeNA Co., Ltd., Kazuho Oku
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include "h2o.h"
#include "h2o/http1.h"
#include "h2o/tunnel.h"
struct st_h2o_tunnel_t {
h2o_context_t *ctx;
h2o_timer_t timeout_entry;
uint64_t timeout;
h2o_socket_t *sock[2];
};
static void on_write_complete(h2o_socket_t *sock, const char *err);
static void close_connection(struct st_h2o_tunnel_t *tunnel)
{
h2o_timer_unlink(&tunnel->timeout_entry);
h2o_socket_close(tunnel->sock[0]);
h2o_socket_close(tunnel->sock[1]);
free(tunnel);
}
static void on_timeout(h2o_timer_t *entry)
{
struct st_h2o_tunnel_t *tunnel = H2O_STRUCT_FROM_MEMBER(struct st_h2o_tunnel_t, timeout_entry, entry);
close_connection(tunnel);
}
static inline void reset_timeout(struct st_h2o_tunnel_t *tunnel)
{
h2o_timer_unlink(&tunnel->timeout_entry);
h2o_timer_link(tunnel->ctx->loop, tunnel->timeout, &tunnel->timeout_entry);
}
static void on_read(h2o_socket_t *sock, const char *err)
{
struct st_h2o_tunnel_t *tunnel = sock->data;
h2o_socket_t *dst;
assert(tunnel != NULL);
assert(tunnel->sock[0] == sock || tunnel->sock[1] == sock);
if (err != NULL) {
close_connection(tunnel);
return;
}
if (sock->input->size == 0)
return;
h2o_socket_read_stop(sock);
reset_timeout(tunnel);
if (tunnel->sock[0] == sock)
dst = tunnel->sock[1];
else
dst = tunnel->sock[0];
h2o_iovec_t buf;
buf.base = sock->input->bytes;
buf.len = sock->input->size;
h2o_socket_write(dst, &buf, 1, on_write_complete);
}
static void on_write_complete(h2o_socket_t *sock, const char *err)
{
struct st_h2o_tunnel_t *tunnel = sock->data;
h2o_socket_t *peer;
assert(tunnel != NULL);
assert(tunnel->sock[0] == sock || tunnel->sock[1] == sock);
if (err != NULL) {
close_connection(tunnel);
return;
}
reset_timeout(tunnel);
if (tunnel->sock[0] == sock)
peer = tunnel->sock[1];
else
peer = tunnel->sock[0];
h2o_buffer_consume(&peer->input, peer->input->size);
h2o_socket_read_start(peer, on_read);
}
h2o_tunnel_t *h2o_tunnel_establish(h2o_context_t *ctx, h2o_socket_t *sock1, h2o_socket_t *sock2, uint64_t timeout)
{
h2o_tunnel_t *tunnel = h2o_mem_alloc(sizeof(*tunnel));
tunnel->ctx = ctx;
tunnel->timeout = timeout;
tunnel->sock[0] = sock1;
tunnel->sock[1] = sock2;
sock1->data = tunnel;
sock2->data = tunnel;
h2o_timer_init(&tunnel->timeout_entry, on_timeout);
h2o_timer_link(tunnel->ctx->loop, timeout, &tunnel->timeout_entry);
/* Bring up the tunnel. Note. Upstream always ready first. */
if (sock2->input->size)
on_read(sock2, NULL);
if (sock1->input->size)
on_read(sock1, NULL);
h2o_socket_read_start(sock2, on_read);
h2o_socket_read_start(sock1, on_read);
return tunnel;
}
void h2o_tunnel_break(h2o_tunnel_t *tunnel)
{
close_connection(tunnel);
}