2 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
27 #include "command-line.h"
30 #include "fatal-signal.h"
31 #include "learning-switch.h"
32 #include "ofp-parse.h"
33 #include "ofp-version-opt.h"
35 #include "openflow/openflow.h"
36 #include "poll-loop.h"
39 #include "stream-ssl.h"
45 #include "socket-util.h"
48 VLOG_DEFINE_THIS_MODULE(controller);
50 #define MAX_SWITCHES 16
51 #define MAX_LISTENERS 16
54 struct lswitch *lswitch;
57 /* -H, --hub: Learn the ports on which MAC addresses appear? */
58 static bool learn_macs = true;
60 /* -n, --noflow: Set up flows? (If not, every packet is processed at the
62 static bool set_up_flows = true;
64 /* -N, --normal: Use "NORMAL" action instead of explicit port? */
65 static bool action_normal = false;
67 /* -w, --wildcard: 0 to disable wildcard flow entries, an OFPFW10_* bitmask to
68 * enable specific wildcards, or UINT32_MAX to use the default wildcards. */
69 static uint32_t wildcards = 0;
71 /* --max-idle: Maximum idle time, in seconds, before flows expire. */
72 static int max_idle = 60;
74 /* --mute: If true, accept connections from switches but do not reply to any
75 * of their messages (for debugging fail-open mode). */
76 static bool mute = false;
78 /* -q, --queue: default OpenFlow queue, none if UINT32_MAX. */
79 static uint32_t default_queue = UINT32_MAX;
81 /* -Q, --port-queue: map from port name to port number. */
82 static struct simap port_queues = SIMAP_INITIALIZER(&port_queues);
84 /* --with-flows: Flows to send to switch. */
85 static struct ofputil_flow_mod *default_flows;
86 static size_t n_default_flows;
87 static enum ofputil_protocol usable_protocols;
89 /* --unixctl: Name of unixctl socket, or null to use the default. */
90 static char *unixctl_path = NULL;
92 static void new_switch(struct switch_ *, struct vconn *);
93 static void parse_options(int argc, char *argv[]);
94 static void usage(void) NO_RETURN;
97 main(int argc, char *argv[])
99 struct unixctl_server *unixctl;
100 struct switch_ switches[MAX_SWITCHES];
101 struct pvconn *listeners[MAX_LISTENERS];
102 int n_switches, n_listeners;
106 proctitle_init(argc, argv);
107 set_program_name(argv[0]);
108 parse_options(argc, argv);
109 fatal_ignore_sigpipe();
111 if (argc - optind < 1) {
112 ovs_fatal(0, "at least one vconn argument required; "
113 "use --help for usage");
116 n_switches = n_listeners = 0;
117 for (i = optind; i < argc; i++) {
118 const char *name = argv[i];
121 retval = vconn_open(name, get_allowed_ofp_versions(), DSCP_DEFAULT,
124 if (n_switches >= MAX_SWITCHES) {
125 ovs_fatal(0, "max %d switch connections", n_switches);
127 new_switch(&switches[n_switches++], vconn);
129 } else if (retval == EAFNOSUPPORT) {
130 struct pvconn *pvconn;
131 retval = pvconn_open(name, get_allowed_ofp_versions(),
132 DSCP_DEFAULT, &pvconn);
134 if (n_listeners >= MAX_LISTENERS) {
135 ovs_fatal(0, "max %d passive connections", n_listeners);
137 listeners[n_listeners++] = pvconn;
141 VLOG_ERR("%s: connect: %s", name, ovs_strerror(retval));
144 if (n_switches == 0 && n_listeners == 0) {
145 ovs_fatal(0, "no active or passive switch connections");
150 retval = unixctl_server_create(unixctl_path, &unixctl);
155 daemonize_complete();
157 while (n_switches > 0 || n_listeners > 0) {
158 /* Accept connections on listening vconns. */
159 for (i = 0; i < n_listeners && n_switches < MAX_SWITCHES; ) {
160 struct vconn *new_vconn;
162 retval = pvconn_accept(listeners[i], &new_vconn);
163 if (!retval || retval == EAGAIN) {
165 new_switch(&switches[n_switches++], new_vconn);
169 pvconn_close(listeners[i]);
170 listeners[i] = listeners[--n_listeners];
174 /* Do some switching work. . */
175 for (i = 0; i < n_switches; ) {
176 struct switch_ *this = &switches[i];
177 lswitch_run(this->lswitch);
178 if (lswitch_is_alive(this->lswitch)) {
181 lswitch_destroy(this->lswitch);
182 switches[i] = switches[--n_switches];
186 unixctl_server_run(unixctl);
188 /* Wait for something to happen. */
189 if (n_switches < MAX_SWITCHES) {
190 for (i = 0; i < n_listeners; i++) {
191 pvconn_wait(listeners[i]);
194 for (i = 0; i < n_switches; i++) {
195 struct switch_ *sw = &switches[i];
196 lswitch_wait(sw->lswitch);
198 unixctl_server_wait(unixctl);
206 new_switch(struct switch_ *sw, struct vconn *vconn)
208 struct lswitch_config cfg;
211 rconn = rconn_create(60, 0, DSCP_DEFAULT, get_allowed_ofp_versions());
212 rconn_connect_unreliably(rconn, vconn, NULL);
214 cfg.mode = (action_normal ? LSW_NORMAL
215 : learn_macs ? LSW_LEARN
217 cfg.wildcards = wildcards;
218 cfg.max_idle = set_up_flows ? max_idle : -1;
219 cfg.default_flows = default_flows;
220 cfg.n_default_flows = n_default_flows;
221 cfg.usable_protocols = usable_protocols;
222 cfg.default_queue = default_queue;
223 cfg.port_queues = &port_queues;
225 sw->lswitch = lswitch_create(rconn, &cfg);
229 add_port_queue(char *s)
231 char *save_ptr = NULL;
235 port_name = strtok_r(s, ":", &save_ptr);
236 queue_id = strtok_r(NULL, "", &save_ptr);
238 ovs_fatal(0, "argument to -Q or --port-queue should take the form "
239 "\"<port-name>:<queue-id>\"");
242 if (!simap_put(&port_queues, port_name, atoi(queue_id))) {
243 ovs_fatal(0, "<port-name> arguments for -Q or --port-queue must "
249 parse_options(int argc, char *argv[])
252 OPT_MAX_IDLE = UCHAR_MAX + 1,
259 OFP_VERSION_OPTION_ENUMS
261 static const struct option long_options[] = {
262 {"hub", no_argument, NULL, 'H'},
263 {"noflow", no_argument, NULL, 'n'},
264 {"normal", no_argument, NULL, 'N'},
265 {"wildcards", optional_argument, NULL, 'w'},
266 {"max-idle", required_argument, NULL, OPT_MAX_IDLE},
267 {"mute", no_argument, NULL, OPT_MUTE},
268 {"queue", required_argument, NULL, 'q'},
269 {"port-queue", required_argument, NULL, 'Q'},
270 {"with-flows", required_argument, NULL, OPT_WITH_FLOWS},
271 {"unixctl", required_argument, NULL, OPT_UNIXCTL},
272 {"help", no_argument, NULL, 'h'},
274 OFP_VERSION_LONG_OPTIONS,
276 STREAM_SSL_LONG_OPTIONS,
277 {"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
280 char *short_options = long_options_to_short_options(long_options);
287 c = getopt_long(argc, argv, short_options, long_options, &indexptr);
298 set_up_flows = false;
306 action_normal = true;
310 wildcards = optarg ? strtol(optarg, NULL, 16) : UINT32_MAX;
314 if (!strcmp(optarg, "permanent")) {
315 max_idle = OFP_FLOW_PERMANENT;
317 max_idle = atoi(optarg);
318 if (max_idle < 1 || max_idle > 65535) {
319 ovs_fatal(0, "--max-idle argument must be between 1 and "
320 "65535 or the word 'permanent'");
326 default_queue = atoi(optarg);
330 add_port_queue(optarg);
334 error = parse_ofp_flow_mod_file(optarg, OFPFC_ADD, &default_flows,
338 ovs_fatal(0, "%s", error);
343 unixctl_path = optarg;
350 OFP_VERSION_OPTION_HANDLERS
351 DAEMON_OPTION_HANDLERS
353 STREAM_SSL_OPTION_HANDLERS
355 case OPT_PEER_CA_CERT:
356 stream_ssl_set_peer_ca_cert_file(optarg);
368 if (!simap_is_empty(&port_queues) || default_queue != UINT32_MAX) {
370 ovs_error(0, "queue IDs are incompatible with -N or --normal; "
371 "not using OFPP_NORMAL");
372 action_normal = false;
376 ovs_error(0, "queue IDs are incompatible with -H or --hub; "
377 "not acting as hub");
386 printf("%s: OpenFlow controller\n"
387 "usage: %s [OPTIONS] METHOD\n"
388 "where METHOD is any OpenFlow connection method.\n",
389 program_name, program_name);
390 vconn_usage(true, true, false);
394 printf("\nOther options:\n"
395 " -H, --hub act as hub instead of learning switch\n"
396 " -n, --noflow pass traffic, but don't add flows\n"
397 " --max-idle=SECS max idle time for new flows\n"
398 " -N, --normal use OFPP_NORMAL action\n"
399 " -w, --wildcards[=MASK] wildcard (specified) bits in flows\n"
400 " -q, --queue=QUEUE-ID OpenFlow queue ID to use for output\n"
401 " -Q PORT-NAME:QUEUE-ID use QUEUE-ID for frames from PORT-NAME\n"
402 " --with-flows FILE use the flows from FILE\n"
403 " --unixctl=SOCKET override default control socket name\n"
404 " -h, --help display this help message\n"
405 " -V, --version display version information\n");