1 /* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
4 * We are making the OpenFlow specification and associated documentation
5 * (Software) available for public use and benefit with the expectation
6 * that others will use, modify and enhance the Software and contribute
7 * those enhancements back to the community. However, since we would
8 * like to make the Software available for broadest use, with as few
9 * restrictions as possible permission is hereby granted, free of
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11 * the Software under the copyrights without restriction, including
12 * without limitation the rights to use, copy, modify, merge, publish,
13 * distribute, sublicense, and/or sell copies of the Software, and to
14 * permit persons to whom the Software is furnished to do so, subject to
15 * the following conditions:
17 * The above copyright notice and this permission notice shall be
18 * included in all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
24 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
25 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
26 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
29 * The name and trademarks of copyright holder(s) may NOT be used in
30 * advertising or publicity pertaining to the Software or any
31 * derivatives without specific, written prior permission.
40 #include "command-line.h"
44 #include "learning-switch.h"
45 #include "poll-loop.h"
48 #include "vconn-ssl.h"
50 #include "vlog-socket.h"
53 #define THIS_MODULE VLM_controller
55 #define MAX_SWITCHES 16
56 #define MAX_LISTENERS 16
59 struct lswitch *lswitch;
63 /* Learn the ports on which MAC addresses appear? */
64 static bool learn_macs = true;
66 /* Set up flows? (If not, every packet is processed at the controller.) */
67 static bool setup_flows = true;
69 static int do_switching(struct switch_ *);
70 static void new_switch(struct switch_ *, struct vconn *, const char *name);
71 static void parse_options(int argc, char *argv[]);
72 static void usage(void) NO_RETURN;
75 main(int argc, char *argv[])
77 struct switch_ switches[MAX_SWITCHES];
78 struct vconn *listeners[MAX_LISTENERS];
79 int n_switches, n_listeners;
83 set_program_name(argv[0]);
84 register_fault_handlers();
86 parse_options(argc, argv);
88 if (argc - optind < 1) {
89 fatal(0, "at least one vconn argument required; use --help for usage");
92 retval = vlog_server_listen(NULL, NULL);
94 fatal(retval, "Could not listen for vlog connections");
97 n_switches = n_listeners = 0;
98 for (i = optind; i < argc; i++) {
99 const char *name = argv[i];
103 retval = vconn_open(name, &vconn);
105 VLOG_ERR("%s: connect: %s", name, strerror(retval));
109 if (vconn_is_passive(vconn)) {
110 if (n_listeners >= MAX_LISTENERS) {
111 fatal(0, "max %d passive connections", n_listeners);
113 listeners[n_listeners++] = vconn;
115 if (n_switches >= MAX_SWITCHES) {
116 fatal(0, "max %d switch connections", n_switches);
118 new_switch(&switches[n_switches++], vconn, name);
121 if (n_switches == 0 && n_listeners == 0) {
122 fatal(0, "no active or passive switch connections");
127 while (n_switches > 0 || n_listeners > 0) {
131 /* Accept connections on listening vconns. */
132 for (i = 0; i < n_listeners && n_switches < MAX_SWITCHES; ) {
133 struct vconn *new_vconn;
136 retval = vconn_accept(listeners[i], &new_vconn);
137 if (!retval || retval == EAGAIN) {
139 new_switch(&switches[n_switches++], new_vconn, "tcp");
143 vconn_close(listeners[i]);
144 listeners[i] = listeners[--n_listeners];
148 /* Do some switching work. Limit the number of iterations so that
149 * callbacks registered with the poll loop don't starve. */
150 for (iteration = 0; iteration < 50; iteration++) {
151 bool progress = false;
152 for (i = 0; i < n_switches; ) {
153 struct switch_ *this = &switches[i];
154 int retval = do_switching(this);
155 if (!retval || retval == EAGAIN) {
161 lswitch_destroy(this->lswitch);
162 rconn_destroy(this->rconn);
163 switches[i] = switches[--n_switches];
171 /* Wait for something to happen. */
172 if (n_switches < MAX_SWITCHES) {
173 for (i = 0; i < n_listeners; i++) {
174 vconn_accept_wait(listeners[i]);
177 for (i = 0; i < n_switches; i++) {
178 struct switch_ *sw = &switches[i];
179 rconn_run_wait(sw->rconn);
180 rconn_recv_wait(sw->rconn);
189 new_switch(struct switch_ *sw, struct vconn *vconn, const char *name)
191 sw->rconn = rconn_new_from_vconn(name, 128, vconn);
192 sw->lswitch = lswitch_create(sw->rconn, learn_macs, setup_flows);
196 do_switching(struct switch_ *sw)
198 unsigned int packets_sent;
201 packets_sent = rconn_packets_sent(sw->rconn);
203 msg = rconn_recv(sw->rconn);
205 lswitch_process_packet(sw->lswitch, sw->rconn, msg);
208 rconn_run(sw->rconn);
210 return (!rconn_is_alive(sw->rconn) ? EOF
211 : rconn_packets_sent(sw->rconn) != packets_sent ? 0
216 parse_options(int argc, char *argv[])
218 static struct option long_options[] = {
219 {"detach", no_argument, 0, 'D'},
220 {"pidfile", optional_argument, 0, 'P'},
221 {"hub", no_argument, 0, 'H'},
222 {"noflow", no_argument, 0, 'n'},
223 {"verbose", optional_argument, 0, 'v'},
224 {"help", no_argument, 0, 'h'},
225 {"version", no_argument, 0, 'V'},
226 VCONN_SSL_LONG_OPTIONS
229 char *short_options = long_options_to_short_options(long_options);
235 c = getopt_long(argc, argv, short_options, long_options, &indexptr);
246 set_pidfile(optarg ? optarg : "controller.pid");
261 printf("%s "VERSION" compiled "__DATE__" "__TIME__"\n", argv[0]);
265 vlog_set_verbosity(optarg);
268 VCONN_SSL_OPTION_HANDLERS
283 printf("%s: OpenFlow controller\n"
284 "usage: %s [OPTIONS] METHOD\n"
285 "where METHOD is any OpenFlow connection method.\n",
286 program_name, program_name);
287 vconn_usage(true, true);
288 printf("\nOther options:\n"
289 " -D, --detach run in background as daemon\n"
290 " -P, --pidfile[=FILE] create pidfile (default: %s/controller.pid)\n"
291 " -H, --hub act as hub instead of learning switch\n"
292 " -n, --noflow pass traffic, but don't add flows\n"
293 " -v, --verbose=MODULE:FACILITY:LEVEL configure logging levels\n"
294 " -v, --verbose set maximum verbosity level\n"
295 " -h, --help display this help message\n"
296 " -V, --version display version information\n",