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/*
* 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_timeout_entry_t timeout_entry;
h2o_timeout_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_timeout_unlink(&tunnel->timeout_entry);
h2o_socket_close(tunnel->sock[0]);
h2o_socket_close(tunnel->sock[1]);
free(tunnel);
}
static void on_timeout(h2o_timeout_entry_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_timeout_unlink(&tunnel->timeout_entry);
h2o_timeout_link(tunnel->ctx->loop, tunnel->timeout, &tunnel->timeout_entry);
}
static inline 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->bytes_read == 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, h2o_timeout_t *timeout)
{
h2o_tunnel_t *tunnel = h2o_mem_alloc(sizeof(*tunnel));
tunnel->ctx = ctx;
tunnel->timeout = timeout;
tunnel->timeout_entry = (h2o_timeout_entry_t){0};
tunnel->timeout_entry.cb = on_timeout;
tunnel->sock[0] = sock1;
tunnel->sock[1] = sock2;
sock1->data = tunnel;
sock2->data = tunnel;
h2o_timeout_link(tunnel->ctx->loop, tunnel->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);
}
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