learn: Avoid 1-byte buffer underrun in learn_format().
[sliver-openvswitch.git] / vswitchd / ovs-vswitchd.c
1 /* Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks
2  *
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15
16 #include <config.h>
17
18 #include <assert.h>
19 #include <errno.h>
20 #include <getopt.h>
21 #include <limits.h>
22 #include <signal.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #ifdef HAVE_MLOCKALL
26 #include <sys/mman.h>
27 #endif
28
29 #include "bridge.h"
30 #include "command-line.h"
31 #include "compiler.h"
32 #include "daemon.h"
33 #include "dirs.h"
34 #include "dummy.h"
35 #include "leak-checker.h"
36 #include "netdev.h"
37 #include "openflow/openflow.h"
38 #include "ovsdb-idl.h"
39 #include "poll-loop.h"
40 #include "process.h"
41 #include "signals.h"
42 #include "stream-ssl.h"
43 #include "stream.h"
44 #include "stress.h"
45 #include "svec.h"
46 #include "timeval.h"
47 #include "unixctl.h"
48 #include "util.h"
49 #include "vconn.h"
50 #include "vlog.h"
51 #include "vswitchd/vswitch-idl.h"
52
53 VLOG_DEFINE_THIS_MODULE(vswitchd);
54
55 static unixctl_cb_func ovs_vswitchd_exit;
56
57 static char *parse_options(int argc, char *argv[]);
58 static void usage(void) NO_RETURN;
59
60 int
61 main(int argc, char *argv[])
62 {
63     struct unixctl_server *unixctl;
64     struct signal *sighup;
65     char *remote;
66     bool exiting;
67     int retval;
68
69     proctitle_init(argc, argv);
70     set_program_name(argv[0]);
71     stress_init_command();
72     remote = parse_options(argc, argv);
73     signal(SIGPIPE, SIG_IGN);
74     sighup = signal_register(SIGHUP);
75     process_init();
76     ovsrec_init();
77
78     daemonize_start();
79
80     retval = unixctl_server_create(NULL, &unixctl);
81     if (retval) {
82         exit(EXIT_FAILURE);
83     }
84     unixctl_command_register("exit", "", ovs_vswitchd_exit, &exiting);
85
86     bridge_init(remote);
87     free(remote);
88
89     exiting = false;
90     while (!exiting) {
91         if (signal_poll(sighup)) {
92             vlog_reopen_log_file();
93         }
94         bridge_run_fast();
95         bridge_run();
96         bridge_run_fast();
97         unixctl_server_run(unixctl);
98         netdev_run();
99
100         signal_wait(sighup);
101         bridge_wait();
102         unixctl_server_wait(unixctl);
103         netdev_wait();
104         if (exiting) {
105             poll_immediate_wake();
106         }
107         poll_block();
108     }
109     bridge_exit();
110     unixctl_server_destroy(unixctl);
111     signal_unregister(sighup);
112
113     return 0;
114 }
115
116 static char *
117 parse_options(int argc, char *argv[])
118 {
119     enum {
120         OPT_PEER_CA_CERT = UCHAR_MAX + 1,
121         OPT_MLOCKALL,
122         VLOG_OPTION_ENUMS,
123         LEAK_CHECKER_OPTION_ENUMS,
124         OPT_BOOTSTRAP_CA_CERT,
125         OPT_ENABLE_DUMMY,
126         DAEMON_OPTION_ENUMS
127     };
128     static struct option long_options[] = {
129         {"help",        no_argument, NULL, 'h'},
130         {"version",     no_argument, NULL, 'V'},
131         {"mlockall",    no_argument, NULL, OPT_MLOCKALL},
132         DAEMON_LONG_OPTIONS,
133         VLOG_LONG_OPTIONS,
134         LEAK_CHECKER_LONG_OPTIONS,
135         STREAM_SSL_LONG_OPTIONS,
136         {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
137         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
138         {"enable-dummy", no_argument, NULL, OPT_ENABLE_DUMMY},
139         {NULL, 0, NULL, 0},
140     };
141     char *short_options = long_options_to_short_options(long_options);
142
143     for (;;) {
144         int c;
145
146         c = getopt_long(argc, argv, short_options, long_options, NULL);
147         if (c == -1) {
148             break;
149         }
150
151         switch (c) {
152         case 'h':
153             usage();
154
155         case 'V':
156             ovs_print_version(OFP_VERSION, OFP_VERSION);
157             exit(EXIT_SUCCESS);
158
159         case OPT_MLOCKALL:
160 #ifdef HAVE_MLOCKALL
161             if (mlockall(MCL_CURRENT | MCL_FUTURE)) {
162                 VLOG_ERR("mlockall failed: %s", strerror(errno));
163             }
164 #else
165             VLOG_ERR("mlockall not supported on this system");
166 #endif
167             break;
168
169         VLOG_OPTION_HANDLERS
170         DAEMON_OPTION_HANDLERS
171         LEAK_CHECKER_OPTION_HANDLERS
172         STREAM_SSL_OPTION_HANDLERS
173
174         case OPT_PEER_CA_CERT:
175             stream_ssl_set_peer_ca_cert_file(optarg);
176             break;
177
178         case OPT_BOOTSTRAP_CA_CERT:
179             stream_ssl_set_ca_cert_file(optarg, true);
180             break;
181
182         case OPT_ENABLE_DUMMY:
183             dummy_enable();
184             break;
185
186         case '?':
187             exit(EXIT_FAILURE);
188
189         default:
190             abort();
191         }
192     }
193     free(short_options);
194
195     argc -= optind;
196     argv += optind;
197
198     switch (argc) {
199     case 0:
200         return xasprintf("unix:%s/db.sock", ovs_rundir());
201
202     case 1:
203         return xstrdup(argv[0]);
204
205     default:
206         VLOG_FATAL("at most one non-option argument accepted; "
207                    "use --help for usage");
208     }
209 }
210
211 static void
212 usage(void)
213 {
214     printf("%s: Open vSwitch daemon\n"
215            "usage: %s [OPTIONS] [DATABASE]\n"
216            "where DATABASE is a socket on which ovsdb-server is listening\n"
217            "      (default: \"unix:%s/db.sock\").\n",
218            program_name, program_name, ovs_rundir());
219     stream_usage("DATABASE", true, false, true);
220     daemon_usage();
221     vlog_usage();
222     printf("\nOther options:\n"
223            "  -h, --help              display this help message\n"
224            "  -V, --version           display version information\n");
225     leak_checker_usage();
226     exit(EXIT_SUCCESS);
227 }
228
229 static void
230 ovs_vswitchd_exit(struct unixctl_conn *conn, const char *args OVS_UNUSED,
231                   void *exiting_)
232 {
233     bool *exiting = exiting_;
234     *exiting = true;
235     unixctl_command_reply(conn, 200, NULL);
236 }