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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <grpc/grpc.h>
#include <string.h>
#include "src/core/channel/channel_args.h"
#include "src/core/channel/http_server_filter.h"
#include "src/core/iomgr/endpoint.h"
#include "src/core/iomgr/resolve_address.h"
#include "src/core/iomgr/tcp_server.h"
#include "src/core/security/auth_filters.h"
#include "src/core/security/credentials.h"
#include "src/core/security/security_connector.h"
#include "src/core/security/secure_transport_setup.h"
#include "src/core/surface/server.h"
#include "src/core/transport/chttp2_transport.h"
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/sync.h>
#include <grpc/support/useful.h>
typedef struct grpc_server_secure_state {
grpc_server *server;
grpc_tcp_server *tcp;
grpc_security_connector *sc;
int is_shutdown;
gpr_mu mu;
gpr_refcount refcount;
} grpc_server_secure_state;
static void state_ref(grpc_server_secure_state *state) {
gpr_ref(&state->refcount);
}
static void state_unref(grpc_server_secure_state *state) {
if (gpr_unref(&state->refcount)) {
/* ensure all threads have unlocked */
gpr_mu_lock(&state->mu);
gpr_mu_unlock(&state->mu);
/* clean up */
grpc_security_connector_unref(state->sc);
gpr_free(state);
}
}
static grpc_transport_setup_result setup_transport(void *statep,
grpc_transport *transport,
grpc_mdctx *mdctx) {
static grpc_channel_filter const *extra_filters[] = {
&grpc_server_auth_filter, &grpc_http_server_filter};
grpc_server_secure_state *state = statep;
grpc_transport_setup_result result;
grpc_arg connector_arg = grpc_security_connector_to_arg(state->sc);
grpc_channel_args *args_copy = grpc_channel_args_copy_and_add(
grpc_server_get_channel_args(state->server), &connector_arg);
result = grpc_server_setup_transport(state->server, transport, extra_filters,
GPR_ARRAY_SIZE(extra_filters), mdctx,
args_copy);
grpc_channel_args_destroy(args_copy);
return result;
}
static void on_secure_transport_setup_done(void *statep,
grpc_security_status status,
grpc_endpoint *secure_endpoint) {
grpc_server_secure_state *state = statep;
if (status == GRPC_SECURITY_OK) {
gpr_mu_lock(&state->mu);
if (!state->is_shutdown) {
grpc_create_chttp2_transport(
setup_transport, state, grpc_server_get_channel_args(state->server),
secure_endpoint, NULL, 0, grpc_mdctx_create(), 0);
} else {
/* We need to consume this here, because the server may already have gone
* away. */
grpc_endpoint_destroy(secure_endpoint);
}
gpr_mu_unlock(&state->mu);
} else {
gpr_log(GPR_ERROR, "Secure transport failed with error %d", status);
}
state_unref(state);
}
static void on_accept(void *statep, grpc_endpoint *tcp) {
grpc_server_secure_state *state = statep;
state_ref(state);
grpc_setup_secure_transport(state->sc, tcp, on_secure_transport_setup_done,
state);
}
/* Server callback: start listening on our ports */
static void start(grpc_server *server, void *statep, grpc_pollset **pollsets,
size_t pollset_count) {
grpc_server_secure_state *state = statep;
grpc_tcp_server_start(state->tcp, pollsets, pollset_count, on_accept, state);
}
static void destroy_done(void *statep) {
grpc_server_secure_state *state = statep;
grpc_server_listener_destroy_done(state->server);
state_unref(state);
}
/* Server callback: destroy the tcp listener (so we don't generate further
callbacks) */
static void destroy(grpc_server *server, void *statep) {
grpc_server_secure_state *state = statep;
grpc_tcp_server *tcp;
gpr_mu_lock(&state->mu);
state->is_shutdown = 1;
tcp = state->tcp;
gpr_mu_unlock(&state->mu);
grpc_tcp_server_destroy(tcp, destroy_done, state);
}
int grpc_server_add_secure_http2_port(grpc_server *server, const char *addr,
grpc_server_credentials *creds) {
grpc_resolved_addresses *resolved = NULL;
grpc_tcp_server *tcp = NULL;
grpc_server_secure_state *state = NULL;
size_t i;
unsigned count = 0;
int port_num = -1;
int port_temp;
grpc_security_status status = GRPC_SECURITY_ERROR;
grpc_security_connector *sc = NULL;
/* create security context */
if (creds == NULL) goto error;
status = grpc_server_credentials_create_security_connector(creds, &sc);
if (status != GRPC_SECURITY_OK) {
gpr_log(GPR_ERROR,
"Unable to create secure server with credentials of type %s.",
creds->type);
goto error;
}
/* resolve address */
resolved = grpc_blocking_resolve_address(addr, "https");
if (!resolved) {
goto error;
}
tcp = grpc_tcp_server_create();
if (!tcp) {
goto error;
}
for (i = 0; i < resolved->naddrs; i++) {
port_temp = grpc_tcp_server_add_port(
tcp, (struct sockaddr *)&resolved->addrs[i].addr,
resolved->addrs[i].len);
if (port_temp >= 0) {
if (port_num == -1) {
port_num = port_temp;
} else {
GPR_ASSERT(port_num == port_temp);
}
count++;
}
}
if (count == 0) {
gpr_log(GPR_ERROR, "No address added out of total %d resolved",
resolved->naddrs);
goto error;
}
if (count != resolved->naddrs) {
gpr_log(GPR_ERROR, "Only %d addresses added out of total %d resolved",
count, resolved->naddrs);
/* if it's an error, don't we want to goto error; here ? */
}
grpc_resolved_addresses_destroy(resolved);
state = gpr_malloc(sizeof(*state));
state->server = server;
state->tcp = tcp;
state->sc = sc;
state->is_shutdown = 0;
gpr_mu_init(&state->mu);
gpr_ref_init(&state->refcount, 1);
/* Register with the server only upon success */
grpc_server_add_listener(server, state, start, destroy);
return port_num;
/* Error path: cleanup and return */
error:
if (sc) {
grpc_security_connector_unref(sc);
}
if (resolved) {
grpc_resolved_addresses_destroy(resolved);
}
if (tcp) {
grpc_tcp_server_destroy(tcp, NULL, NULL);
}
if (state) {
gpr_free(state);
}
return 0;
}
|
