qapi: Fix code generation with Python 3.5
[qemu.git] / migration / tls.c
1 /*
2 * QEMU migration TLS support
3 *
4 * Copyright (c) 2015 Red Hat, Inc.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 *
19 */
20
21 #include "qemu/osdep.h"
22 #include "channel.h"
23 #include "migration.h"
24 #include "tls.h"
25 #include "io/channel-tls.h"
26 #include "crypto/tlscreds.h"
27 #include "qemu/error-report.h"
28 #include "qapi/error.h"
29 #include "trace.h"
30
31 static QCryptoTLSCreds *
32 migration_tls_get_creds(MigrationState *s,
33 QCryptoTLSCredsEndpoint endpoint,
34 Error **errp)
35 {
36 Object *creds;
37 QCryptoTLSCreds *ret;
38
39 creds = object_resolve_path_component(
40 object_get_objects_root(), s->parameters.tls_creds);
41 if (!creds) {
42 error_setg(errp, "No TLS credentials with id '%s'",
43 s->parameters.tls_creds);
44 return NULL;
45 }
46 ret = (QCryptoTLSCreds *)object_dynamic_cast(
47 creds, TYPE_QCRYPTO_TLS_CREDS);
48 if (!ret) {
49 error_setg(errp, "Object with id '%s' is not TLS credentials",
50 s->parameters.tls_creds);
51 return NULL;
52 }
53 if (ret->endpoint != endpoint) {
54 error_setg(errp,
55 "Expected TLS credentials for a %s endpoint",
56 endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT ?
57 "client" : "server");
58 return NULL;
59 }
60
61 object_ref(OBJECT(ret));
62 return ret;
63 }
64
65
66 static void migration_tls_incoming_handshake(QIOTask *task,
67 gpointer opaque)
68 {
69 QIOChannel *ioc = QIO_CHANNEL(qio_task_get_source(task));
70 Error *err = NULL;
71
72 if (qio_task_propagate_error(task, &err)) {
73 trace_migration_tls_incoming_handshake_error(error_get_pretty(err));
74 error_report_err(err);
75 } else {
76 trace_migration_tls_incoming_handshake_complete();
77 migration_channel_process_incoming(ioc);
78 }
79 object_unref(OBJECT(ioc));
80 }
81
82 void migration_tls_channel_process_incoming(MigrationState *s,
83 QIOChannel *ioc,
84 Error **errp)
85 {
86 QCryptoTLSCreds *creds;
87 QIOChannelTLS *tioc;
88
89 creds = migration_tls_get_creds(
90 s, QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, errp);
91 if (!creds) {
92 return;
93 }
94
95 tioc = qio_channel_tls_new_server(
96 ioc, creds,
97 s->parameters.tls_authz,
98 errp);
99 if (!tioc) {
100 return;
101 }
102
103 trace_migration_tls_incoming_handshake_start();
104 qio_channel_set_name(QIO_CHANNEL(tioc), "migration-tls-incoming");
105 qio_channel_tls_handshake(tioc,
106 migration_tls_incoming_handshake,
107 NULL,
108 NULL,
109 NULL);
110 }
111
112
113 static void migration_tls_outgoing_handshake(QIOTask *task,
114 gpointer opaque)
115 {
116 MigrationState *s = opaque;
117 QIOChannel *ioc = QIO_CHANNEL(qio_task_get_source(task));
118 Error *err = NULL;
119
120 if (qio_task_propagate_error(task, &err)) {
121 trace_migration_tls_outgoing_handshake_error(error_get_pretty(err));
122 } else {
123 trace_migration_tls_outgoing_handshake_complete();
124 }
125 migration_channel_connect(s, ioc, NULL, err);
126 object_unref(OBJECT(ioc));
127 }
128
129
130 void migration_tls_channel_connect(MigrationState *s,
131 QIOChannel *ioc,
132 const char *hostname,
133 Error **errp)
134 {
135 QCryptoTLSCreds *creds;
136 QIOChannelTLS *tioc;
137
138 creds = migration_tls_get_creds(
139 s, QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT, errp);
140 if (!creds) {
141 return;
142 }
143
144 if (s->parameters.tls_hostname && *s->parameters.tls_hostname) {
145 hostname = s->parameters.tls_hostname;
146 }
147 if (!hostname) {
148 error_setg(errp, "No hostname available for TLS");
149 return;
150 }
151
152 tioc = qio_channel_tls_new_client(
153 ioc, creds, hostname, errp);
154 if (!tioc) {
155 return;
156 }
157
158 trace_migration_tls_outgoing_handshake_start(hostname);
159 qio_channel_set_name(QIO_CHANNEL(tioc), "migration-tls-outgoing");
160 qio_channel_tls_handshake(tioc,
161 migration_tls_outgoing_handshake,
162 s,
163 NULL,
164 NULL);
165 }