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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/* Copyright 2011 Justin Erenkrantz and Greg Stein
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*** Setup a SSL tunnel over a HTTP proxy, according to RFC 2817. ***/
#include <apr_pools.h>
#include <apr_strings.h>
#include "serf.h"
#include "serf_private.h"
/* Structure passed around as baton for the CONNECT request and respone. */
typedef struct {
apr_pool_t *pool;
const char *uri;
} req_ctx_t;
/* forward declaration. */
static apr_status_t setup_request(serf_request_t *request,
void *setup_baton,
serf_bucket_t **req_bkt,
serf_response_acceptor_t *acceptor,
void **acceptor_baton,
serf_response_handler_t *handler,
void **handler_baton,
apr_pool_t *pool);
static serf_bucket_t* accept_response(serf_request_t *request,
serf_bucket_t *stream,
void *acceptor_baton,
apr_pool_t *pool)
{
serf_bucket_t *c;
serf_bucket_alloc_t *bkt_alloc;
#if 0
req_ctx_t *ctx = acceptor_baton;
#endif
/* get the per-request bucket allocator */
bkt_alloc = serf_request_get_alloc(request);
/* Create a barrier so the response doesn't eat us! */
c = serf_bucket_barrier_create(stream, bkt_alloc);
return serf_bucket_response_create(c, bkt_alloc);
}
/* If a 200 OK was received for the CONNECT request, consider the connection
as ready for use. */
static apr_status_t handle_response(serf_request_t *request,
serf_bucket_t *response,
void *handler_baton,
apr_pool_t *pool)
{
apr_status_t status;
serf_status_line sl;
req_ctx_t *ctx = handler_baton;
if (! response) {
serf_connection_request_create(request->conn,
setup_request,
ctx);
return APR_SUCCESS;
}
status = serf_bucket_response_status(response, &sl);
if (SERF_BUCKET_READ_ERROR(status)) {
return status;
}
if (!sl.version && (APR_STATUS_IS_EOF(status) ||
APR_STATUS_IS_EAGAIN(status)))
{
return status;
}
status = serf_bucket_response_wait_for_headers(response);
if (status && !APR_STATUS_IS_EOF(status)) {
return status;
}
/* RFC 2817: Any successful (2xx) response to a CONNECT request indicates
that the proxy has established a connection to the requested host and
port, and has switched to tunneling the current connection to that server
connection.
*/
if (sl.code >= 200 && sl.code < 300) {
request->conn->state = SERF_CONN_CONNECTED;
/* Body is supposed to be empty. */
apr_pool_destroy(ctx->pool);
serf_bucket_destroy(request->conn->ssltunnel_ostream);
request->conn->stream = NULL;
ctx = NULL;
serf__log(CONN_VERBOSE, __FILE__,
"successfully set up ssl tunnel on connection 0x%x\n",
request->conn);
return APR_EOF;
}
/* Authentication failure and 2xx Ok are handled at this point,
the rest are errors. */
return SERF_ERROR_SSLTUNNEL_SETUP_FAILED;
}
/* Prepare the CONNECT request. */
static apr_status_t setup_request(serf_request_t *request,
void *setup_baton,
serf_bucket_t **req_bkt,
serf_response_acceptor_t *acceptor,
void **acceptor_baton,
serf_response_handler_t *handler,
void **handler_baton,
apr_pool_t *pool)
{
req_ctx_t *ctx = setup_baton;
*req_bkt =
serf_request_bucket_request_create(request,
"CONNECT", ctx->uri,
NULL,
serf_request_get_alloc(request));
*acceptor = accept_response;
*acceptor_baton = ctx;
*handler = handle_response;
*handler_baton = ctx;
return APR_SUCCESS;
}
static apr_status_t detect_eof(void *baton, serf_bucket_t *aggregate_bucket)
{
serf_connection_t *conn = baton;
conn->hit_eof = 1;
return APR_EAGAIN;
}
/* SSL tunnel is needed, push a CONNECT request on the connection. */
apr_status_t serf__ssltunnel_connect(serf_connection_t *conn)
{
req_ctx_t *ctx;
apr_pool_t *ssltunnel_pool;
apr_pool_create(&ssltunnel_pool, conn->pool);
ctx = apr_palloc(ssltunnel_pool, sizeof(*ctx));
ctx->pool = ssltunnel_pool;
ctx->uri = apr_psprintf(ctx->pool, "%s:%d", conn->host_info.hostname,
conn->host_info.port);
conn->ssltunnel_ostream = serf__bucket_stream_create(conn->allocator,
detect_eof,
conn);
serf__ssltunnel_request_create(conn,
setup_request,
ctx);
conn->state = SERF_CONN_SETUP_SSLTUNNEL;
serf__log(CONN_VERBOSE, __FILE__,
"setting up ssl tunnel on connection 0x%x\n", conn);
return APR_SUCCESS;
}
|
