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
10 * charge, to any person obtaining a copy of this Software to deal in
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"
43 #include "learning-switch.h"
44 #include "poll-loop.h"
47 #include "vconn-ssl.h"
49 #include "vlog-socket.h"
52 #define THIS_MODULE VLM_controller
54 #define MAX_SWITCHES 16
55 #define MAX_LISTENERS 16
58 struct lswitch *lswitch;
62 /* Learn the ports on which MAC addresses appear? */
63 static bool learn_macs = true;
65 /* Set up flows? (If not, every packet is processed at the controller.) */
66 static bool setup_flows = true;
68 static int do_switching(struct switch_ *);
69 static void new_switch(struct switch_ *, struct vconn *, const char *name);
70 static void parse_options(int argc, char *argv[]);
71 static void usage(void) NO_RETURN;
74 main(int argc, char *argv[])
76 struct switch_ switches[MAX_SWITCHES];
77 struct vconn *listeners[MAX_LISTENERS];
78 int n_switches, n_listeners;
82 set_program_name(argv[0]);
83 register_fault_handlers();
85 parse_options(argc, argv);
87 if (argc - optind < 1) {
88 fatal(0, "at least one vconn argument required; use --help for usage");
91 retval = vlog_server_listen(NULL, NULL);
93 fatal(retval, "Could not listen for vlog connections");
96 n_switches = n_listeners = 0;
97 for (i = optind; i < argc; i++) {
98 const char *name = argv[i];
102 retval = vconn_open(name, &vconn);
104 VLOG_ERR("%s: connect: %s", name, strerror(retval));
108 if (vconn_is_passive(vconn)) {
109 if (n_listeners >= MAX_LISTENERS) {
110 fatal(0, "max %d passive connections", n_listeners);
112 listeners[n_listeners++] = vconn;
114 if (n_switches >= MAX_SWITCHES) {
115 fatal(0, "max %d switch connections", n_switches);
117 new_switch(&switches[n_switches++], vconn, name);
120 if (n_switches == 0 && n_listeners == 0) {
121 fatal(0, "no active or passive switch connections");
124 while (n_switches > 0 || n_listeners > 0) {
128 /* Accept connections on listening vconns. */
129 for (i = 0; i < n_listeners && n_switches < MAX_SWITCHES; ) {
130 struct vconn *new_vconn;
133 retval = vconn_accept(listeners[i], &new_vconn);
134 if (!retval || retval == EAGAIN) {
136 new_switch(&switches[n_switches++], new_vconn, "tcp");
140 vconn_close(listeners[i]);
141 listeners[i] = listeners[--n_listeners];
145 /* Do some switching work. Limit the number of iterations so that
146 * callbacks registered with the poll loop don't starve. */
147 for (iteration = 0; iteration < 50; iteration++) {
148 bool progress = false;
149 for (i = 0; i < n_switches; ) {
150 struct switch_ *this = &switches[i];
151 int retval = do_switching(this);
152 if (!retval || retval == EAGAIN) {
158 lswitch_destroy(this->lswitch);
159 rconn_destroy(this->rconn);
160 switches[i] = switches[--n_switches];
168 /* Wait for something to happen. */
169 if (n_switches < MAX_SWITCHES) {
170 for (i = 0; i < n_listeners; i++) {
171 vconn_accept_wait(listeners[i]);
174 for (i = 0; i < n_switches; i++) {
175 struct switch_ *sw = &switches[i];
176 rconn_run_wait(sw->rconn);
177 rconn_recv_wait(sw->rconn);
186 new_switch(struct switch_ *sw, struct vconn *vconn, const char *name)
188 sw->rconn = rconn_new_from_vconn(name, 128, vconn);
189 sw->lswitch = lswitch_create(sw->rconn, learn_macs, setup_flows);
193 do_switching(struct switch_ *sw)
195 unsigned int packets_sent;
198 packets_sent = rconn_packets_sent(sw->rconn);
200 msg = rconn_recv(sw->rconn);
202 lswitch_process_packet(sw->lswitch, sw->rconn, msg);
205 rconn_run(sw->rconn);
207 return (!rconn_is_alive(sw->rconn) ? EOF
208 : rconn_packets_sent(sw->rconn) != packets_sent ? 0
213 parse_options(int argc, char *argv[])
215 static struct option long_options[] = {
216 {"hub", no_argument, 0, 'H'},
217 {"noflow", no_argument, 0, 'n'},
218 {"verbose", optional_argument, 0, 'v'},
219 {"help", no_argument, 0, 'h'},
220 {"version", no_argument, 0, 'V'},
221 VCONN_SSL_LONG_OPTIONS
224 char *short_options = long_options_to_short_options(long_options);
230 c = getopt_long(argc, argv, short_options, long_options, &indexptr);
248 printf("%s "VERSION" compiled "__DATE__" "__TIME__"\n", argv[0]);
252 vlog_set_verbosity(optarg);
255 VCONN_SSL_OPTION_HANDLERS
270 printf("%s: OpenFlow controller\n"
271 "usage: %s [OPTIONS] METHOD\n"
272 "where METHOD is any OpenFlow connection method.\n",
273 program_name, program_name);
274 vconn_usage(true, true);
275 printf("\nOther options:\n"
276 " -H, --hub act as hub instead of learning switch\n"
277 " -n, --noflow pass traffic, but don't add flows\n"
278 " -v, --verbose set maximum verbosity level\n"
279 " -h, --help display this help message\n"
280 " -V, --version display version information\n");