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ovs/utilities/ovs-testcontroller.c
Thomas Graf cab5044987 lib: Move compiler.h to <openvswitch/compiler.h> 
The following macros are renamed to avoid conflicts with other headers:
 * WARN_UNUSED_RESULT to OVS_WARN_UNUSED_RESULT
 * PRINTF_FORMAT to OVS_PRINTF_FORMAT
 * NO_RETURN to OVS_NO_RETURN

Signed-off-by: Thomas Graf <tgraf@noironetworks.com>
Acked-by: Ben Pfaff <blp@nicira.com>
2014-12-15 14:14:47 +01:00

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/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include <errno.h>
#include <getopt.h>
#include <limits.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "command-line.h"
#include "compiler.h"
#include "daemon.h"
#include "fatal-signal.h"
#include "learning-switch.h"
#include "ofp-parse.h"
#include "ofp-version-opt.h"
#include "ofpbuf.h"
#include "openflow/openflow.h"
#include "poll-loop.h"
#include "rconn.h"
#include "simap.h"
#include "stream-ssl.h"
#include "timeval.h"
#include "unixctl.h"
#include "util.h"
#include "vconn.h"
#include "vlog.h"
#include "socket-util.h"
#include "ofp-util.h"
VLOG_DEFINE_THIS_MODULE(controller);
#define MAX_SWITCHES 16
#define MAX_LISTENERS 16
struct switch_ {
struct lswitch *lswitch;
};
/* -H, --hub: Learn the ports on which MAC addresses appear? */
static bool learn_macs = true;
/* -n, --noflow: Set up flows? (If not, every packet is processed at the
* controller.) */
static bool set_up_flows = true;
/* -N, --normal: Use "NORMAL" action instead of explicit port? */
static bool action_normal = false;
/* -w, --wildcard: 0 to disable wildcard flow entries, an OFPFW10_* bitmask to
* enable specific wildcards, or UINT32_MAX to use the default wildcards. */
static uint32_t wildcards = 0;
/* --max-idle: Maximum idle time, in seconds, before flows expire. */
static int max_idle = 60;
/* --mute: If true, accept connections from switches but do not reply to any
* of their messages (for debugging fail-open mode). */
static bool mute = false;
/* -q, --queue: default OpenFlow queue, none if UINT32_MAX. */
static uint32_t default_queue = UINT32_MAX;
/* -Q, --port-queue: map from port name to port number. */
static struct simap port_queues = SIMAP_INITIALIZER(&port_queues);
/* --with-flows: Flows to send to switch. */
static struct ofputil_flow_mod *default_flows;
static size_t n_default_flows;
static enum ofputil_protocol usable_protocols;
/* --unixctl: Name of unixctl socket, or null to use the default. */
static char *unixctl_path = NULL;
static void new_switch(struct switch_ *, struct vconn *);
static void parse_options(int argc, char *argv[]);
OVS_NO_RETURN static void usage(void);
int
main(int argc, char *argv[])
{
struct unixctl_server *unixctl;
struct switch_ switches[MAX_SWITCHES];
struct pvconn *listeners[MAX_LISTENERS];
int n_switches, n_listeners;
int retval;
int i;
proctitle_init(argc, argv);
set_program_name(argv[0]);
parse_options(argc, argv);
fatal_ignore_sigpipe();
if (argc - optind < 1) {
ovs_fatal(0, "at least one vconn argument required; "
"use --help for usage");
}
n_switches = n_listeners = 0;
for (i = optind; i < argc; i++) {
const char *name = argv[i];
struct vconn *vconn;
retval = vconn_open(name, get_allowed_ofp_versions(), DSCP_DEFAULT,
&vconn);
if (!retval) {
if (n_switches >= MAX_SWITCHES) {
ovs_fatal(0, "max %d switch connections", n_switches);
}
new_switch(&switches[n_switches++], vconn);
continue;
} else if (retval == EAFNOSUPPORT) {
struct pvconn *pvconn;
retval = pvconn_open(name, get_allowed_ofp_versions(),
DSCP_DEFAULT, &pvconn);
if (!retval) {
if (n_listeners >= MAX_LISTENERS) {
ovs_fatal(0, "max %d passive connections", n_listeners);
}
listeners[n_listeners++] = pvconn;
}
}
if (retval) {
VLOG_ERR("%s: connect: %s", name, ovs_strerror(retval));
}
}
if (n_switches == 0 && n_listeners == 0) {
ovs_fatal(0, "no active or passive switch connections");
}
daemonize_start();
retval = unixctl_server_create(unixctl_path, &unixctl);
if (retval) {
exit(EXIT_FAILURE);
}
daemonize_complete();
while (n_switches > 0 || n_listeners > 0) {
/* Accept connections on listening vconns. */
for (i = 0; i < n_listeners && n_switches < MAX_SWITCHES; ) {
struct vconn *new_vconn;
retval = pvconn_accept(listeners[i], &new_vconn);
if (!retval || retval == EAGAIN) {
if (!retval) {
new_switch(&switches[n_switches++], new_vconn);
}
i++;
} else {
pvconn_close(listeners[i]);
listeners[i] = listeners[--n_listeners];
}
}
/* Do some switching work. . */
for (i = 0; i < n_switches; ) {
struct switch_ *this = &switches[i];
lswitch_run(this->lswitch);
if (lswitch_is_alive(this->lswitch)) {
i++;
} else {
lswitch_destroy(this->lswitch);
switches[i] = switches[--n_switches];
}
}
unixctl_server_run(unixctl);
/* Wait for something to happen. */
if (n_switches < MAX_SWITCHES) {
for (i = 0; i < n_listeners; i++) {
pvconn_wait(listeners[i]);
}
}
for (i = 0; i < n_switches; i++) {
struct switch_ *sw = &switches[i];
lswitch_wait(sw->lswitch);
}
unixctl_server_wait(unixctl);
poll_block();
}
return 0;
}
static void
new_switch(struct switch_ *sw, struct vconn *vconn)
{
struct lswitch_config cfg;
struct rconn *rconn;
rconn = rconn_create(60, 0, DSCP_DEFAULT, get_allowed_ofp_versions());
rconn_connect_unreliably(rconn, vconn, NULL);
cfg.mode = (action_normal ? LSW_NORMAL
: learn_macs ? LSW_LEARN
: LSW_FLOOD);
cfg.wildcards = wildcards;
cfg.max_idle = set_up_flows ? max_idle : -1;
cfg.default_flows = default_flows;
cfg.n_default_flows = n_default_flows;
cfg.usable_protocols = usable_protocols;
cfg.default_queue = default_queue;
cfg.port_queues = &port_queues;
cfg.mute = mute;
sw->lswitch = lswitch_create(rconn, &cfg);
}
static void
add_port_queue(char *s)
{
char *save_ptr = NULL;
char *port_name;
char *queue_id;
port_name = strtok_r(s, ":", &save_ptr);
queue_id = strtok_r(NULL, "", &save_ptr);
if (!queue_id) {
ovs_fatal(0, "argument to -Q or --port-queue should take the form "
"\"<port-name>:<queue-id>\"");
}
if (!simap_put(&port_queues, port_name, atoi(queue_id))) {
ovs_fatal(0, "<port-name> arguments for -Q or --port-queue must "
"be unique");
}
}
static void
parse_options(int argc, char *argv[])
{
enum {
OPT_MAX_IDLE = UCHAR_MAX + 1,
OPT_PEER_CA_CERT,
OPT_MUTE,
OPT_WITH_FLOWS,
OPT_UNIXCTL,
VLOG_OPTION_ENUMS,
DAEMON_OPTION_ENUMS,
OFP_VERSION_OPTION_ENUMS
};
static const struct option long_options[] = {
{"hub", no_argument, NULL, 'H'},
{"noflow", no_argument, NULL, 'n'},
{"normal", no_argument, NULL, 'N'},
{"wildcards", optional_argument, NULL, 'w'},
{"max-idle", required_argument, NULL, OPT_MAX_IDLE},
{"mute", no_argument, NULL, OPT_MUTE},
{"queue", required_argument, NULL, 'q'},
{"port-queue", required_argument, NULL, 'Q'},
{"with-flows", required_argument, NULL, OPT_WITH_FLOWS},
{"unixctl", required_argument, NULL, OPT_UNIXCTL},
{"help", no_argument, NULL, 'h'},
DAEMON_LONG_OPTIONS,
OFP_VERSION_LONG_OPTIONS,
VLOG_LONG_OPTIONS,
STREAM_SSL_LONG_OPTIONS,
{"peer-ca-cert", required_argument, NULL, OPT_PEER_CA_CERT},
{NULL, 0, NULL, 0},
};
char *short_options = long_options_to_short_options(long_options);
for (;;) {
int indexptr;
char *error;
int c;
c = getopt_long(argc, argv, short_options, long_options, &indexptr);
if (c == -1) {
break;
}
switch (c) {
case 'H':
learn_macs = false;
break;
case 'n':
set_up_flows = false;
break;
case OPT_MUTE:
mute = true;
break;
case 'N':
action_normal = true;
break;
case 'w':
wildcards = optarg ? strtol(optarg, NULL, 16) : UINT32_MAX;
break;
case OPT_MAX_IDLE:
if (!strcmp(optarg, "permanent")) {
max_idle = OFP_FLOW_PERMANENT;
} else {
max_idle = atoi(optarg);
if (max_idle < 1 || max_idle > 65535) {
ovs_fatal(0, "--max-idle argument must be between 1 and "
"65535 or the word 'permanent'");
}
}
break;
case 'q':
default_queue = atoi(optarg);
break;
case 'Q':
add_port_queue(optarg);
break;
case OPT_WITH_FLOWS:
error = parse_ofp_flow_mod_file(optarg, OFPFC_ADD, &default_flows,
&n_default_flows,
&usable_protocols);
if (error) {
ovs_fatal(0, "%s", error);
}
break;
case OPT_UNIXCTL:
unixctl_path = optarg;
break;
case 'h':
usage();
VLOG_OPTION_HANDLERS
OFP_VERSION_OPTION_HANDLERS
DAEMON_OPTION_HANDLERS
STREAM_SSL_OPTION_HANDLERS
case OPT_PEER_CA_CERT:
stream_ssl_set_peer_ca_cert_file(optarg);
break;
case '?':
exit(EXIT_FAILURE);
default:
abort();
}
}
free(short_options);
if (!simap_is_empty(&port_queues) || default_queue != UINT32_MAX) {
if (action_normal) {
ovs_error(0, "queue IDs are incompatible with -N or --normal; "
"not using OFPP_NORMAL");
action_normal = false;
}
if (!learn_macs) {
ovs_error(0, "queue IDs are incompatible with -H or --hub; "
"not acting as hub");
learn_macs = true;
}
}
}
static void
usage(void)
{
printf("%s: OpenFlow controller\n"
"usage: %s [OPTIONS] METHOD\n"
"where METHOD is any OpenFlow connection method.\n",
program_name, program_name);
vconn_usage(true, true, false);
daemon_usage();
ofp_version_usage();
vlog_usage();
printf("\nOther options:\n"
" -H, --hub act as hub instead of learning switch\n"
" -n, --noflow pass traffic, but don't add flows\n"
" --max-idle=SECS max idle time for new flows\n"
" -N, --normal use OFPP_NORMAL action\n"
" -w, --wildcards[=MASK] wildcard (specified) bits in flows\n"
" -q, --queue=QUEUE-ID OpenFlow queue ID to use for output\n"
" -Q PORT-NAME:QUEUE-ID use QUEUE-ID for frames from PORT-NAME\n"
" --with-flows FILE use the flows from FILE\n"
" --unixctl=SOCKET override default control socket name\n"
" -h, --help display this help message\n"
" -V, --version display version information\n");
exit(EXIT_SUCCESS);
}
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