Ben Pfaff
6b617bac12
This makes it easier to install the headers, or to use them directly from another software package with -I$(openflow)/include, without invading the top-level include file namespace.
308 lines
9.3 KiB
C
308 lines
9.3 KiB
C
/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
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* Junior University
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*
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* We are making the OpenFlow specification and associated documentation
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* (Software) available for public use and benefit with the expectation
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* that others will use, modify and enhance the Software and contribute
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* those enhancements back to the community. However, since we would
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* like to make the Software available for broadest use, with as few
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* restrictions as possible permission is hereby granted, free of
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* charge, to any person obtaining a copy of this Software to deal in
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* the Software under the copyrights without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* The name and trademarks of copyright holder(s) may NOT be used in
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* advertising or publicity pertaining to the Software or any
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* derivatives without specific, written prior permission.
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*/
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#include <config.h>
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#include <errno.h>
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#include <getopt.h>
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#include <limits.h>
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#include <signal.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include "command-line.h"
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#include "daemon.h"
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#include "datapath.h"
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#include "fault.h"
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#include "openflow/openflow.h"
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#include "poll-loop.h"
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#include "queue.h"
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#include "util.h"
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#include "rconn.h"
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#include "timeval.h"
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#include "vconn.h"
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#include "vconn-ssl.h"
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#include "vlog-socket.h"
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#define THIS_MODULE VLM_switch
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#include "vlog.h"
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/* Strings to describe the manufacturer, hardware, and software. This data
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* is queriable through the switch description stats message. */
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char mfr_desc[DESC_STR_LEN] = "Nicira Networks";
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char hw_desc[DESC_STR_LEN] = "Reference User-Space Switch";
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char sw_desc[DESC_STR_LEN] = VERSION;
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char serial_num[SERIAL_NUM_LEN] = "None";
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static void parse_options(int argc, char *argv[]);
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static void usage(void) NO_RETURN;
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static const char *listen_pvconn_name;
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static struct datapath *dp;
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static uint64_t dpid = UINT64_MAX;
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static char *port_list;
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/* --max-backoff: Maximum interval between controller connection attempts, in
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* seconds. */
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static int max_backoff = 15;
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static void add_ports(struct datapath *dp, char *port_list);
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int
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main(int argc, char *argv[])
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{
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struct rconn *rconn;
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int error;
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set_program_name(argv[0]);
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register_fault_handlers();
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time_init();
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vlog_init();
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parse_options(argc, argv);
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signal(SIGPIPE, SIG_IGN);
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if (argc - optind != 1) {
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ofp_fatal(0, "missing controller argument; use --help for usage");
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}
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rconn = rconn_create(60, max_backoff);
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error = rconn_connect(rconn, argv[optind]);
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if (error == EAFNOSUPPORT) {
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ofp_fatal(0, "no support for %s vconn", argv[optind]);
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}
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error = dp_new(&dp, dpid, rconn);
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if (listen_pvconn_name) {
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struct pvconn *listen_pvconn;
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int retval;
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retval = pvconn_open(listen_pvconn_name, &listen_pvconn);
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if (retval && retval != EAGAIN) {
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ofp_fatal(retval, "opening %s", listen_pvconn_name);
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}
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dp_add_listen_pvconn(dp, listen_pvconn);
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}
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if (error) {
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ofp_fatal(error, "could not create datapath");
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}
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if (port_list) {
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add_ports(dp, port_list);
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}
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error = vlog_server_listen(NULL, NULL);
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if (error) {
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ofp_fatal(error, "could not listen for vlog connections");
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}
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die_if_already_running();
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daemonize();
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for (;;) {
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dp_run(dp);
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dp_wait(dp);
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poll_block();
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}
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return 0;
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}
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static void
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add_ports(struct datapath *dp, char *port_list)
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{
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char *port, *save_ptr;
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/* Glibc 2.7 has a bug in strtok_r when compiling with optimization that
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* can cause segfaults here:
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* http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
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* Using ",," instead of the obvious "," works around it. */
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for (port = strtok_r(port_list, ",,", &save_ptr); port;
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port = strtok_r(NULL, ",,", &save_ptr)) {
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int error = dp_add_port(dp, port);
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if (error) {
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ofp_fatal(error, "failed to add port %s", port);
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}
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}
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}
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static void
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parse_options(int argc, char *argv[])
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{
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enum {
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OPT_MAX_BACKOFF = UCHAR_MAX + 1,
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OPT_MFR_DESC,
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OPT_HW_DESC,
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OPT_SW_DESC,
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OPT_SERIAL_NUM,
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OPT_BOOTSTRAP_CA_CERT
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};
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static struct option long_options[] = {
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{"interfaces", required_argument, 0, 'i'},
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{"datapath-id", required_argument, 0, 'd'},
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{"max-backoff", required_argument, 0, OPT_MAX_BACKOFF},
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{"listen", required_argument, 0, 'l'},
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{"verbose", optional_argument, 0, 'v'},
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{"help", no_argument, 0, 'h'},
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{"version", no_argument, 0, 'V'},
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{"mfr-desc", required_argument, 0, OPT_MFR_DESC},
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{"hw-desc", required_argument, 0, OPT_HW_DESC},
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{"sw-desc", required_argument, 0, OPT_SW_DESC},
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{"serial_num", required_argument, 0, OPT_SERIAL_NUM},
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DAEMON_LONG_OPTIONS,
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#ifdef HAVE_OPENSSL
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VCONN_SSL_LONG_OPTIONS
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{"bootstrap-ca-cert", required_argument, 0, OPT_BOOTSTRAP_CA_CERT},
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#endif
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{0, 0, 0, 0},
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};
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char *short_options = long_options_to_short_options(long_options);
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for (;;) {
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int indexptr;
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int c;
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c = getopt_long(argc, argv, short_options, long_options, &indexptr);
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if (c == -1) {
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break;
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}
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switch (c) {
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case 'd':
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if (strlen(optarg) != 12
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|| strspn(optarg, "0123456789abcdefABCDEF") != 12) {
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ofp_fatal(0, "argument to -d or --datapath-id must be "
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"exactly 12 hex digits");
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}
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dpid = strtoll(optarg, NULL, 16);
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if (!dpid) {
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ofp_fatal(0, "argument to -d or --datapath-id must "
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"be nonzero");
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}
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break;
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case 'h':
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usage();
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case 'V':
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printf("%s "VERSION" compiled "__DATE__" "__TIME__"\n", argv[0]);
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exit(EXIT_SUCCESS);
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case 'v':
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vlog_set_verbosity(optarg);
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break;
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case 'i':
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if (!port_list) {
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port_list = optarg;
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} else {
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port_list = xasprintf("%s,%s", port_list, optarg);
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}
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break;
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case OPT_MAX_BACKOFF:
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max_backoff = atoi(optarg);
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if (max_backoff < 1) {
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ofp_fatal(0, "--max-backoff argument must be at least 1");
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} else if (max_backoff > 3600) {
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max_backoff = 3600;
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}
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break;
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case OPT_MFR_DESC:
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strncpy(mfr_desc, optarg, sizeof mfr_desc);
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break;
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case OPT_HW_DESC:
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strncpy(hw_desc, optarg, sizeof hw_desc);
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break;
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case OPT_SW_DESC:
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strncpy(sw_desc, optarg, sizeof sw_desc);
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break;
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case OPT_SERIAL_NUM:
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strncpy(serial_num, optarg, sizeof serial_num);
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break;
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case 'l':
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if (listen_pvconn_name) {
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ofp_fatal(0, "-l or --listen may be only specified once");
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}
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listen_pvconn_name = optarg;
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break;
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DAEMON_OPTION_HANDLERS
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#ifdef HAVE_OPENSSL
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VCONN_SSL_OPTION_HANDLERS
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case OPT_BOOTSTRAP_CA_CERT:
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vconn_ssl_set_ca_cert_file(optarg, true);
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break;
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#endif
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case '?':
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exit(EXIT_FAILURE);
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default:
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abort();
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}
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}
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free(short_options);
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}
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static void
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usage(void)
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{
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printf("%s: userspace OpenFlow switch\n"
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"usage: %s [OPTIONS] CONTROLLER\n"
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"where CONTROLLER is an active OpenFlow connection method.\n",
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program_name, program_name);
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vconn_usage(true, true, true);
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printf("\nConfiguration options:\n"
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" -i, --interfaces=NETDEV[,NETDEV]...\n"
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" add specified initial switch ports\n"
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" -d, --datapath-id=ID Use ID as the OpenFlow switch ID\n"
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" (ID must consist of 12 hex digits)\n"
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" --max-backoff=SECS max time between controller connection\n"
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" attempts (default: 15 seconds)\n"
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" -l, --listen=METHOD allow management connections on METHOD\n"
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" (a passive OpenFlow connection method)\n");
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daemon_usage();
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vlog_usage();
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printf("\nOther options:\n"
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" -h, --help display this help message\n"
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" -V, --version display version information\n");
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exit(EXIT_SUCCESS);
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}
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