2 * Copyright (c) 2008, 2009 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 set_program_name(argv[0]);
88 parse_options(argc, argv);
89 signal(SIGPIPE, SIG_IGN);
91 if (argc - optind < 1) {
92 ovs_fatal(0, "at least one vconn argument required; "
93 "use --help for usage");
96 n_switches = n_listeners = 0;
97 for (i = optind; i < argc; i++) {
98 const char *name = argv[i];
102 retval = vconn_open(name, OFP_VERSION, &vconn);
104 if (n_switches >= MAX_SWITCHES) {
105 ovs_fatal(0, "max %d switch connections", n_switches);
107 new_switch(&switches[n_switches++], vconn, name);
109 } else if (retval == EAFNOSUPPORT) {
110 struct pvconn *pvconn;
111 retval = pvconn_open(name, &pvconn);
113 if (n_listeners >= MAX_LISTENERS) {
114 ovs_fatal(0, "max %d passive connections", n_listeners);
116 listeners[n_listeners++] = pvconn;
120 VLOG_ERR("%s: connect: %s", name, strerror(retval));
123 if (n_switches == 0 && n_listeners == 0) {
124 ovs_fatal(0, "no active or passive switch connections");
127 die_if_already_running();
130 retval = unixctl_server_create(NULL, &unixctl);
132 ovs_fatal(retval, "Could not listen for unixctl connections");
135 daemonize_complete();
137 while (n_switches > 0 || n_listeners > 0) {
141 /* Accept connections on listening vconns. */
142 for (i = 0; i < n_listeners && n_switches < MAX_SWITCHES; ) {
143 struct vconn *new_vconn;
146 retval = pvconn_accept(listeners[i], OFP_VERSION, &new_vconn);
147 if (!retval || retval == EAGAIN) {
149 new_switch(&switches[n_switches++], new_vconn, "tcp");
153 pvconn_close(listeners[i]);
154 listeners[i] = listeners[--n_listeners];
158 /* Do some switching work. Limit the number of iterations so that
159 * callbacks registered with the poll loop don't starve. */
160 for (iteration = 0; iteration < 50; iteration++) {
161 bool progress = false;
162 for (i = 0; i < n_switches; ) {
163 struct switch_ *this = &switches[i];
164 int retval = do_switching(this);
165 if (!retval || retval == EAGAIN) {
171 rconn_destroy(this->rconn);
172 lswitch_destroy(this->lswitch);
173 switches[i] = switches[--n_switches];
180 for (i = 0; i < n_switches; i++) {
181 struct switch_ *this = &switches[i];
182 lswitch_run(this->lswitch, this->rconn);
185 unixctl_server_run(unixctl);
187 /* Wait for something to happen. */
188 if (n_switches < MAX_SWITCHES) {
189 for (i = 0; i < n_listeners; i++) {
190 pvconn_wait(listeners[i]);
193 for (i = 0; i < n_switches; i++) {
194 struct switch_ *sw = &switches[i];
195 rconn_run_wait(sw->rconn);
196 rconn_recv_wait(sw->rconn);
197 lswitch_wait(sw->lswitch);
199 unixctl_server_wait(unixctl);
207 new_switch(struct switch_ *sw, struct vconn *vconn, const char *name)
209 sw->rconn = rconn_new_from_vconn(name, vconn);
210 sw->lswitch = lswitch_create(sw->rconn, learn_macs, exact_flows,
211 set_up_flows ? max_idle : -1,
216 do_switching(struct switch_ *sw)
218 unsigned int packets_sent;
221 packets_sent = rconn_packets_sent(sw->rconn);
223 msg = rconn_recv(sw->rconn);
226 lswitch_process_packet(sw->lswitch, sw->rconn, msg);
230 rconn_run(sw->rconn);
232 return (!rconn_is_alive(sw->rconn) ? EOF
233 : rconn_packets_sent(sw->rconn) != packets_sent ? 0
238 parse_options(int argc, char *argv[])
241 OPT_MAX_IDLE = UCHAR_MAX + 1,
246 static struct option long_options[] = {
247 {"hub", no_argument, 0, 'H'},
248 {"noflow", no_argument, 0, 'n'},
249 {"normal", no_argument, 0, 'N'},
250 {"wildcard", no_argument, 0, 'w'},
251 {"max-idle", required_argument, 0, OPT_MAX_IDLE},
252 {"mute", no_argument, 0, OPT_MUTE},
253 {"help", no_argument, 0, 'h'},
254 {"version", no_argument, 0, 'V'},
258 STREAM_SSL_LONG_OPTIONS
259 {"peer-ca-cert", required_argument, 0, OPT_PEER_CA_CERT},
263 char *short_options = long_options_to_short_options(long_options);
269 c = getopt_long(argc, argv, short_options, long_options, &indexptr);
280 set_up_flows = false;
288 action_normal = true;
296 if (!strcmp(optarg, "permanent")) {
297 max_idle = OFP_FLOW_PERMANENT;
299 max_idle = atoi(optarg);
300 if (max_idle < 1 || max_idle > 65535) {
301 ovs_fatal(0, "--max-idle argument must be between 1 and "
302 "65535 or the word 'permanent'");
311 OVS_PRINT_VERSION(OFP_VERSION, OFP_VERSION);
315 DAEMON_OPTION_HANDLERS
318 STREAM_SSL_OPTION_HANDLERS
320 case OPT_PEER_CA_CERT:
321 stream_ssl_set_peer_ca_cert_file(optarg);
338 printf("%s: OpenFlow controller\n"
339 "usage: %s [OPTIONS] METHOD\n"
340 "where METHOD is any OpenFlow connection method.\n",
341 program_name, program_name);
342 vconn_usage(true, true, false);
345 printf("\nOther options:\n"
346 " -H, --hub act as hub instead of learning switch\n"
347 " -n, --noflow pass traffic, but don't add flows\n"
348 " --max-idle=SECS max idle time for new flows\n"
349 " -N, --normal use OFPAT_NORMAL action\n"
350 " -w, --wildcard use wildcards, not exact-match rules\n"
351 " -h, --help display this help message\n"
352 " -V, --version display version information\n");