2 * Copyright (c) 2008, 2009, 2010 Nicira Networks.
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.
26 #include "command-line.h"
29 #include "learning-switch.h"
31 #include "openflow/openflow.h"
32 #include "poll-loop.h"
34 #include "stream-ssl.h"
41 #define THIS_MODULE VLM_controller
43 #define MAX_SWITCHES 16
44 #define MAX_LISTENERS 16
47 struct lswitch *lswitch;
51 /* Learn the ports on which MAC addresses appear? */
52 static bool learn_macs = true;
54 /* Set up flows? (If not, every packet is processed at the controller.) */
55 static bool set_up_flows = true;
57 /* -N, --normal: Use "NORMAL" action instead of explicit port? */
58 static bool action_normal = false;
60 /* -w, --wildcard: Set up exact match or wildcard flow entries? */
61 static bool exact_flows = true;
63 /* --max-idle: Maximum idle time, in seconds, before flows expire. */
64 static int max_idle = 60;
66 /* --mute: If true, accept connections from switches but do not reply to any
67 * of their messages (for debugging fail-open mode). */
68 static bool mute = false;
70 static int do_switching(struct switch_ *);
71 static void new_switch(struct switch_ *, struct vconn *, const char *name);
72 static void parse_options(int argc, char *argv[]);
73 static void usage(void) NO_RETURN;
76 main(int argc, char *argv[])
78 struct unixctl_server *unixctl;
79 struct switch_ switches[MAX_SWITCHES];
80 struct pvconn *listeners[MAX_LISTENERS];
81 int n_switches, n_listeners;
85 proctitle_init(argc, argv);
86 set_program_name(argv[0]);
89 parse_options(argc, argv);
90 signal(SIGPIPE, SIG_IGN);
92 if (argc - optind < 1) {
93 ovs_fatal(0, "at least one vconn argument required; "
94 "use --help for usage");
97 n_switches = n_listeners = 0;
98 for (i = optind; i < argc; i++) {
99 const char *name = argv[i];
103 retval = vconn_open(name, OFP_VERSION, &vconn);
105 if (n_switches >= MAX_SWITCHES) {
106 ovs_fatal(0, "max %d switch connections", n_switches);
108 new_switch(&switches[n_switches++], vconn, name);
110 } else if (retval == EAFNOSUPPORT) {
111 struct pvconn *pvconn;
112 retval = pvconn_open(name, &pvconn);
114 if (n_listeners >= MAX_LISTENERS) {
115 ovs_fatal(0, "max %d passive connections", n_listeners);
117 listeners[n_listeners++] = pvconn;
121 VLOG_ERR("%s: connect: %s", name, strerror(retval));
124 if (n_switches == 0 && n_listeners == 0) {
125 ovs_fatal(0, "no active or passive switch connections");
128 die_if_already_running();
131 retval = unixctl_server_create(NULL, &unixctl);
136 daemonize_complete();
138 while (n_switches > 0 || n_listeners > 0) {
142 /* Accept connections on listening vconns. */
143 for (i = 0; i < n_listeners && n_switches < MAX_SWITCHES; ) {
144 struct vconn *new_vconn;
147 retval = pvconn_accept(listeners[i], OFP_VERSION, &new_vconn);
148 if (!retval || retval == EAGAIN) {
150 new_switch(&switches[n_switches++], new_vconn, "tcp");
154 pvconn_close(listeners[i]);
155 listeners[i] = listeners[--n_listeners];
159 /* Do some switching work. Limit the number of iterations so that
160 * callbacks registered with the poll loop don't starve. */
161 for (iteration = 0; iteration < 50; iteration++) {
162 bool progress = false;
163 for (i = 0; i < n_switches; ) {
164 struct switch_ *this = &switches[i];
165 int retval = do_switching(this);
166 if (!retval || retval == EAGAIN) {
172 rconn_destroy(this->rconn);
173 lswitch_destroy(this->lswitch);
174 switches[i] = switches[--n_switches];
181 for (i = 0; i < n_switches; i++) {
182 struct switch_ *this = &switches[i];
183 lswitch_run(this->lswitch, this->rconn);
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 rconn_run_wait(sw->rconn);
197 rconn_recv_wait(sw->rconn);
198 lswitch_wait(sw->lswitch);
200 unixctl_server_wait(unixctl);
208 new_switch(struct switch_ *sw, struct vconn *vconn, const char *name)
210 sw->rconn = rconn_new_from_vconn(name, vconn);
211 sw->lswitch = lswitch_create(sw->rconn, learn_macs, exact_flows,
212 set_up_flows ? max_idle : -1,
217 do_switching(struct switch_ *sw)
219 unsigned int packets_sent;
222 packets_sent = rconn_packets_sent(sw->rconn);
224 msg = rconn_recv(sw->rconn);
227 lswitch_process_packet(sw->lswitch, sw->rconn, msg);
231 rconn_run(sw->rconn);
233 return (!rconn_is_alive(sw->rconn) ? EOF
234 : rconn_packets_sent(sw->rconn) != packets_sent ? 0
239 parse_options(int argc, char *argv[])
242 OPT_MAX_IDLE = UCHAR_MAX + 1,
247 static struct option long_options[] = {
248 {"hub", no_argument, 0, 'H'},
249 {"noflow", no_argument, 0, 'n'},
250 {"normal", no_argument, 0, 'N'},
251 {"wildcard", no_argument, 0, 'w'},
252 {"max-idle", required_argument, 0, OPT_MAX_IDLE},
253 {"mute", no_argument, 0, OPT_MUTE},
254 {"help", no_argument, 0, 'h'},
255 {"version", no_argument, 0, 'V'},
259 STREAM_SSL_LONG_OPTIONS
260 {"peer-ca-cert", required_argument, 0, OPT_PEER_CA_CERT},
264 char *short_options = long_options_to_short_options(long_options);
270 c = getopt_long(argc, argv, short_options, long_options, &indexptr);
281 set_up_flows = false;
289 action_normal = true;
297 if (!strcmp(optarg, "permanent")) {
298 max_idle = OFP_FLOW_PERMANENT;
300 max_idle = atoi(optarg);
301 if (max_idle < 1 || max_idle > 65535) {
302 ovs_fatal(0, "--max-idle argument must be between 1 and "
303 "65535 or the word 'permanent'");
312 OVS_PRINT_VERSION(OFP_VERSION, OFP_VERSION);
316 DAEMON_OPTION_HANDLERS
319 STREAM_SSL_OPTION_HANDLERS
321 case OPT_PEER_CA_CERT:
322 stream_ssl_set_peer_ca_cert_file(optarg);
339 printf("%s: OpenFlow controller\n"
340 "usage: %s [OPTIONS] METHOD\n"
341 "where METHOD is any OpenFlow connection method.\n",
342 program_name, program_name);
343 vconn_usage(true, true, false);
346 printf("\nOther options:\n"
347 " -H, --hub act as hub instead of learning switch\n"
348 " -n, --noflow pass traffic, but don't add flows\n"
349 " --max-idle=SECS max idle time for new flows\n"
350 " -N, --normal use OFPAT_NORMAL action\n"
351 " -w, --wildcard use wildcards, not exact-match rules\n"
352 " -h, --help display this help message\n"
353 " -V, --version display version information\n");