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ovs/utilities/ovs-ofctl.c
Ethan Jackson 1eb85ef540 ovs-ofctl: Support daemonization for monitor and snoop. 
This will ease implementation of future unit tests.

Signed-off-by: Ethan Jackson <ethan@nicira.com>
2012-01-10 14:30:14 -08:00

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/*
* Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
*
* 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 <inttypes.h>
#include <sys/socket.h>
#include <net/if.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/time.h>
#include "byte-order.h"
#include "classifier.h"
#include "command-line.h"
#include "daemon.h"
#include "compiler.h"
#include "dirs.h"
#include "dynamic-string.h"
#include "netlink.h"
#include "nx-match.h"
#include "odp-util.h"
#include "ofp-parse.h"
#include "ofp-print.h"
#include "ofp-util.h"
#include "ofpbuf.h"
#include "ofproto/ofproto.h"
#include "openflow/nicira-ext.h"
#include "openflow/openflow.h"
#include "poll-loop.h"
#include "random.h"
#include "stream-ssl.h"
#include "timeval.h"
#include "unixctl.h"
#include "util.h"
#include "vconn.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(ofctl);
/* --strict: Use strict matching for flow mod commands? */
static bool strict;
/* --readd: If ture, on replace-flows, re-add even flows that have not changed
* (to reset flow counters). */
static bool readd;
/* -F, --flow-format: Flow format to use. Either one of NXFF_* to force a
* particular flow format or -1 to let ovs-ofctl choose intelligently. */
static int preferred_flow_format = -1;
/* -m, --more: Additional verbosity for ofp-print functions. */
static int verbosity;
static const struct command all_commands[];
static void usage(void) NO_RETURN;
static void parse_options(int argc, char *argv[]);
int
main(int argc, char *argv[])
{
set_program_name(argv[0]);
parse_options(argc, argv);
signal(SIGPIPE, SIG_IGN);
run_command(argc - optind, argv + optind, all_commands);
return 0;
}
static void
parse_options(int argc, char *argv[])
{
enum {
OPT_STRICT = UCHAR_MAX + 1,
OPT_READD,
DAEMON_OPTION_ENUMS,
VLOG_OPTION_ENUMS
};
static struct option long_options[] = {
{"timeout", required_argument, NULL, 't'},
{"strict", no_argument, NULL, OPT_STRICT},
{"readd", no_argument, NULL, OPT_READD},
{"flow-format", required_argument, NULL, 'F'},
{"more", no_argument, NULL, 'm'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
DAEMON_LONG_OPTIONS,
VLOG_LONG_OPTIONS,
STREAM_SSL_LONG_OPTIONS,
{NULL, 0, NULL, 0},
};
char *short_options = long_options_to_short_options(long_options);
for (;;) {
unsigned long int timeout;
int c;
c = getopt_long(argc, argv, short_options, long_options, NULL);
if (c == -1) {
break;
}
switch (c) {
case 't':
timeout = strtoul(optarg, NULL, 10);
if (timeout <= 0) {
ovs_fatal(0, "value %s on -t or --timeout is not at least 1",
optarg);
} else {
time_alarm(timeout);
}
break;
case 'F':
preferred_flow_format = ofputil_flow_format_from_string(optarg);
if (preferred_flow_format < 0) {
ovs_fatal(0, "unknown flow format `%s'", optarg);
}
break;
case 'm':
verbosity++;
break;
case 'h':
usage();
case 'V':
ovs_print_version(OFP_VERSION, OFP_VERSION);
exit(EXIT_SUCCESS);
case OPT_STRICT:
strict = true;
break;
case OPT_READD:
readd = true;
break;
DAEMON_OPTION_HANDLERS
VLOG_OPTION_HANDLERS
STREAM_SSL_OPTION_HANDLERS
case '?':
exit(EXIT_FAILURE);
default:
abort();
}
}
free(short_options);
}
static void
usage(void)
{
printf("%s: OpenFlow switch management utility\n"
"usage: %s [OPTIONS] COMMAND [ARG...]\n"
"\nFor OpenFlow switches:\n"
" show SWITCH show OpenFlow information\n"
" dump-desc SWITCH print switch description\n"
" dump-tables SWITCH print table stats\n"
" mod-port SWITCH IFACE ACT modify port behavior\n"
" get-frags SWITCH print fragment handling behavior\n"
" set-frags SWITCH FRAG_MODE set fragment handling behavior\n"
" dump-ports SWITCH [PORT] print port statistics\n"
" dump-flows SWITCH print all flow entries\n"
" dump-flows SWITCH FLOW print matching FLOWs\n"
" dump-aggregate SWITCH print aggregate flow statistics\n"
" dump-aggregate SWITCH FLOW print aggregate stats for FLOWs\n"
" queue-stats SWITCH [PORT [QUEUE]] dump queue stats\n"
" add-flow SWITCH FLOW add flow described by FLOW\n"
" add-flows SWITCH FILE add flows from FILE\n"
" mod-flows SWITCH FLOW modify actions of matching FLOWs\n"
" del-flows SWITCH [FLOW] delete matching FLOWs\n"
" replace-flows SWITCH FILE replace flows with those in FILE\n"
" monitor SWITCH [MISSLEN] print packets received from SWITCH\n"
"\nFor OpenFlow switches and controllers:\n"
" probe TARGET probe whether TARGET is up\n"
" ping TARGET [N] latency of N-byte echos\n"
" benchmark TARGET N COUNT bandwidth of COUNT N-byte echos\n"
"where SWITCH or TARGET is an active OpenFlow connection method.\n",
program_name, program_name);
vconn_usage(true, false, false);
daemon_usage();
vlog_usage();
printf("\nOther options:\n"
" --strict use strict match for flow commands\n"
" --readd replace flows that haven't changed\n"
" -F, --flow-format=FORMAT force particular flow format\n"
" -m, --more be more verbose printing OpenFlow\n"
" -t, --timeout=SECS give up after SECS seconds\n"
" -h, --help display this help message\n"
" -V, --version display version information\n");
exit(EXIT_SUCCESS);
}
static void
ofctl_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[] OVS_UNUSED, void *exiting_)
{
bool *exiting = exiting_;
*exiting = true;
unixctl_command_reply(conn, 200, "");
}
static void run(int retval, const char *message, ...)
PRINTF_FORMAT(2, 3);
static void run(int retval, const char *message, ...)
{
if (retval) {
va_list args;
va_start(args, message);
ovs_fatal_valist(retval, message, args);
}
}
/* Generic commands. */
static void
open_vconn_socket(const char *name, struct vconn **vconnp)
{
char *vconn_name = xasprintf("unix:%s", name);
VLOG_DBG("connecting to %s", vconn_name);
run(vconn_open_block(vconn_name, OFP_VERSION, vconnp),
"connecting to %s", vconn_name);
free(vconn_name);
}
static void
open_vconn__(const char *name, const char *default_suffix,
struct vconn **vconnp)
{
char *datapath_name, *datapath_type, *socket_name;
char *bridge_path;
struct stat s;
bridge_path = xasprintf("%s/%s.%s", ovs_rundir(), name, default_suffix);
ofproto_parse_name(name, &datapath_name, &datapath_type);
socket_name = xasprintf("%s/%s.%s",
ovs_rundir(), datapath_name, default_suffix);
free(datapath_name);
free(datapath_type);
if (strchr(name, ':')) {
run(vconn_open_block(name, OFP_VERSION, vconnp),
"connecting to %s", name);
} else if (!stat(name, &s) && S_ISSOCK(s.st_mode)) {
open_vconn_socket(name, vconnp);
} else if (!stat(bridge_path, &s) && S_ISSOCK(s.st_mode)) {
open_vconn_socket(bridge_path, vconnp);
} else if (!stat(socket_name, &s)) {
if (!S_ISSOCK(s.st_mode)) {
ovs_fatal(0, "cannot connect to %s: %s is not a socket",
name, socket_name);
}
open_vconn_socket(socket_name, vconnp);
} else {
ovs_fatal(0, "%s is not a bridge or a socket", name);
}
free(bridge_path);
free(socket_name);
}
static void
open_vconn(const char *name, struct vconn **vconnp)
{
return open_vconn__(name, "mgmt", vconnp);
}
static void *
alloc_stats_request(size_t rq_len, uint16_t type, struct ofpbuf **bufferp)
{
struct ofp_stats_msg *rq;
rq = make_openflow(rq_len, OFPT_STATS_REQUEST, bufferp);
rq->type = htons(type);
rq->flags = htons(0);
return rq;
}
static void
send_openflow_buffer(struct vconn *vconn, struct ofpbuf *buffer)
{
update_openflow_length(buffer);
run(vconn_send_block(vconn, buffer), "failed to send packet to switch");
}
static void
dump_transaction(const char *vconn_name, struct ofpbuf *request)
{
struct vconn *vconn;
struct ofpbuf *reply;
update_openflow_length(request);
open_vconn(vconn_name, &vconn);
run(vconn_transact(vconn, request, &reply), "talking to %s", vconn_name);
ofp_print(stdout, reply->data, reply->size, verbosity + 1);
vconn_close(vconn);
}
static void
dump_trivial_transaction(const char *vconn_name, uint8_t request_type)
{
struct ofpbuf *request;
make_openflow(sizeof(struct ofp_header), request_type, &request);
dump_transaction(vconn_name, request);
}
static void
dump_stats_transaction(const char *vconn_name, struct ofpbuf *request)
{
ovs_be32 send_xid = ((struct ofp_header *) request->data)->xid;
struct vconn *vconn;
bool done = false;
open_vconn(vconn_name, &vconn);
send_openflow_buffer(vconn, request);
while (!done) {
ovs_be32 recv_xid;
struct ofpbuf *reply;
run(vconn_recv_block(vconn, &reply), "OpenFlow packet receive failed");
recv_xid = ((struct ofp_header *) reply->data)->xid;
if (send_xid == recv_xid) {
struct ofp_stats_msg *osm;
ofp_print(stdout, reply->data, reply->size, verbosity + 1);
osm = ofpbuf_at(reply, 0, sizeof *osm);
done = !osm || !(ntohs(osm->flags) & OFPSF_REPLY_MORE);
} else {
VLOG_DBG("received reply with xid %08"PRIx32" "
"!= expected %08"PRIx32, recv_xid, send_xid);
}
ofpbuf_delete(reply);
}
vconn_close(vconn);
}
static void
dump_trivial_stats_transaction(const char *vconn_name, uint8_t stats_type)
{
struct ofpbuf *request;
alloc_stats_request(sizeof(struct ofp_stats_msg), stats_type, &request);
dump_stats_transaction(vconn_name, request);
}
/* Sends 'request', which should be a request that only has a reply if an error
* occurs, and waits for it to succeed or fail. If an error does occur, prints
* it and exits with an error.
*
* Destroys all of the 'requests'. */
static void
transact_multiple_noreply(struct vconn *vconn, struct list *requests)
{
struct ofpbuf *request, *reply;
LIST_FOR_EACH (request, list_node, requests) {
update_openflow_length(request);
}
run(vconn_transact_multiple_noreply(vconn, requests, &reply),
"talking to %s", vconn_get_name(vconn));
if (reply) {
ofp_print(stderr, reply->data, reply->size, verbosity + 2);
exit(1);
}
ofpbuf_delete(reply);
}
/* Sends 'request', which should be a request that only has a reply if an error
* occurs, and waits for it to succeed or fail. If an error does occur, prints
* it and exits with an error.
*
* Destroys 'request'. */
static void
transact_noreply(struct vconn *vconn, struct ofpbuf *request)
{
struct list requests;
list_init(&requests);
list_push_back(&requests, &request->list_node);
transact_multiple_noreply(vconn, &requests);
}
static void
fetch_switch_config(struct vconn *vconn, struct ofp_switch_config *config_)
{
struct ofp_switch_config *config;
struct ofp_header *header;
struct ofpbuf *request;
struct ofpbuf *reply;
make_openflow(sizeof(struct ofp_header), OFPT_GET_CONFIG_REQUEST,
&request);
run(vconn_transact(vconn, request, &reply),
"talking to %s", vconn_get_name(vconn));
header = reply->data;
if (header->type != OFPT_GET_CONFIG_REPLY ||
header->length != htons(sizeof *config)) {
ovs_fatal(0, "%s: bad reply to config request", vconn_get_name(vconn));
}
config = reply->data;
*config_ = *config;
}
static void
set_switch_config(struct vconn *vconn, struct ofp_switch_config *config_)
{
struct ofp_switch_config *config;
struct ofp_header save_header;
struct ofpbuf *request;
config = make_openflow(sizeof *config, OFPT_SET_CONFIG, &request);
save_header = config->header;
*config = *config_;
config->header = save_header;
transact_noreply(vconn, request);
}
static void
do_show(int argc OVS_UNUSED, char *argv[])
{
dump_trivial_transaction(argv[1], OFPT_FEATURES_REQUEST);
dump_trivial_transaction(argv[1], OFPT_GET_CONFIG_REQUEST);
}
static void
do_dump_desc(int argc OVS_UNUSED, char *argv[])
{
dump_trivial_stats_transaction(argv[1], OFPST_DESC);
}
static void
do_dump_tables(int argc OVS_UNUSED, char *argv[])
{
dump_trivial_stats_transaction(argv[1], OFPST_TABLE);
}
/* Opens a connection to 'vconn_name', fetches the ofp_phy_port structure for
* 'port_name' (which may be a port name or number), and copies it into
* '*oppp'. */
static void
fetch_ofp_phy_port(const char *vconn_name, const char *port_name,
struct ofp_phy_port *oppp)
{
struct ofpbuf *request, *reply;
struct ofp_switch_features *osf;
unsigned int port_no;
struct vconn *vconn;
int n_ports;
int port_idx;
/* Try to interpret the argument as a port number. */
if (!str_to_uint(port_name, 10, &port_no)) {
port_no = UINT_MAX;
}
/* Fetch the switch's ofp_switch_features. */
make_openflow(sizeof(struct ofp_header), OFPT_FEATURES_REQUEST, &request);
open_vconn(vconn_name, &vconn);
run(vconn_transact(vconn, request, &reply), "talking to %s", vconn_name);
osf = reply->data;
if (reply->size < sizeof *osf) {
ovs_fatal(0, "%s: received too-short features reply (only %zu bytes)",
vconn_name, reply->size);
}
n_ports = (reply->size - sizeof *osf) / sizeof *osf->ports;
for (port_idx = 0; port_idx < n_ports; port_idx++) {
const struct ofp_phy_port *opp = &osf->ports[port_idx];
if (port_no != UINT_MAX
? htons(port_no) == opp->port_no
: !strncmp(opp->name, port_name, sizeof opp->name)) {
*oppp = *opp;
ofpbuf_delete(reply);
vconn_close(vconn);
return;
}
}
ovs_fatal(0, "%s: couldn't find port `%s'", vconn_name, port_name);
}
/* Returns the port number corresponding to 'port_name' (which may be a port
* name or number) within the switch 'vconn_name'. */
static uint16_t
str_to_port_no(const char *vconn_name, const char *port_name)
{
unsigned int port_no;
if (str_to_uint(port_name, 10, &port_no)) {
return port_no;
} else {
struct ofp_phy_port opp;
fetch_ofp_phy_port(vconn_name, port_name, &opp);
return ntohs(opp.port_no);
}
}
static bool
try_set_flow_format(struct vconn *vconn, enum nx_flow_format flow_format)
{
struct ofpbuf *sff, *reply;
sff = ofputil_make_set_flow_format(flow_format);
run(vconn_transact_noreply(vconn, sff, &reply),
"talking to %s", vconn_get_name(vconn));
if (reply) {
char *s = ofp_to_string(reply->data, reply->size, 2);
VLOG_DBG("%s: failed to set flow format %s, controller replied: %s",
vconn_get_name(vconn),
ofputil_flow_format_to_string(flow_format),
s);
free(s);
ofpbuf_delete(reply);
return false;
}
return true;
}
static void
set_flow_format(struct vconn *vconn, enum nx_flow_format flow_format)
{
struct ofpbuf *sff = ofputil_make_set_flow_format(flow_format);
transact_noreply(vconn, sff);
VLOG_DBG("%s: using user-specified flow format %s",
vconn_get_name(vconn),
ofputil_flow_format_to_string(flow_format));
}
static enum nx_flow_format
negotiate_highest_flow_format(struct vconn *vconn,
enum nx_flow_format min_format)
{
if (preferred_flow_format != -1) {
if (preferred_flow_format < min_format) {
ovs_fatal(0, "%s: cannot use requested flow format %s for "
"specified flow", vconn_get_name(vconn),
ofputil_flow_format_to_string(min_format));
}
set_flow_format(vconn, preferred_flow_format);
return preferred_flow_format;
} else {
enum nx_flow_format flow_format;
if (try_set_flow_format(vconn, NXFF_NXM)) {
flow_format = NXFF_NXM;
} else {
flow_format = NXFF_OPENFLOW10;
}
if (flow_format < min_format) {
ovs_fatal(0, "%s: cannot use switch's most advanced flow format "
"%s for specified flow", vconn_get_name(vconn),
ofputil_flow_format_to_string(min_format));
}
VLOG_DBG("%s: negotiated flow format %s", vconn_get_name(vconn),
ofputil_flow_format_to_string(flow_format));
return flow_format;
}
}
static void
do_dump_flows__(int argc, char *argv[], bool aggregate)
{
enum nx_flow_format min_flow_format, flow_format;
struct ofputil_flow_stats_request fsr;
struct ofpbuf *request;
struct vconn *vconn;
parse_ofp_flow_stats_request_str(&fsr, aggregate, argc > 2 ? argv[2] : "");
open_vconn(argv[1], &vconn);
min_flow_format = ofputil_min_flow_format(&fsr.match);
if (fsr.cookie_mask != htonll(0)) {
min_flow_format = NXFF_NXM;
}
flow_format = negotiate_highest_flow_format(vconn, min_flow_format);
request = ofputil_encode_flow_stats_request(&fsr, flow_format);
dump_stats_transaction(argv[1], request);
vconn_close(vconn);
}
static void
do_dump_flows(int argc, char *argv[])
{
return do_dump_flows__(argc, argv, false);
}
static void
do_dump_aggregate(int argc, char *argv[])
{
return do_dump_flows__(argc, argv, true);
}
static void
do_queue_stats(int argc, char *argv[])
{
struct ofp_queue_stats_request *req;
struct ofpbuf *request;
req = alloc_stats_request(sizeof *req, OFPST_QUEUE, &request);
if (argc > 2 && argv[2][0] && strcasecmp(argv[2], "all")) {
req->port_no = htons(str_to_port_no(argv[1], argv[2]));
} else {
req->port_no = htons(OFPP_ALL);
}
if (argc > 3 && argv[3][0] && strcasecmp(argv[3], "all")) {
req->queue_id = htonl(atoi(argv[3]));
} else {
req->queue_id = htonl(OFPQ_ALL);
}
memset(req->pad, 0, sizeof req->pad);
dump_stats_transaction(argv[1], request);
}
/* Sets up the flow format for a vconn that will be used to modify the flow
* table. Returns the flow format used, after possibly adding an OpenFlow
* request to 'requests'.
*
* If 'preferred_flow_format' is -1, returns NXFF_OPENFLOW10 without modifying
* 'requests', since NXFF_OPENFLOW10 is the default flow format for any
* OpenFlow connection.
*
* If 'preferred_flow_format' is a specific format, adds a request to set that
* format to 'requests' and returns the format. */
static enum nx_flow_format
set_initial_format_for_flow_mod(struct list *requests)
{
if (preferred_flow_format < 0) {
return NXFF_OPENFLOW10;
} else {
struct ofpbuf *sff;
sff = ofputil_make_set_flow_format(preferred_flow_format);
list_push_back(requests, &sff->list_node);
return preferred_flow_format;
}
}
/* Checks that 'flow_format' is acceptable as a flow format after a flow_mod
* operation, given the global 'preferred_flow_format'. */
static void
check_final_format_for_flow_mod(enum nx_flow_format flow_format)
{
if (preferred_flow_format >= 0 && flow_format > preferred_flow_format) {
ovs_fatal(0, "flow cannot be expressed in flow format %s "
"(flow format %s or better is required)",
ofputil_flow_format_to_string(preferred_flow_format),
ofputil_flow_format_to_string(flow_format));
}
}
static void
do_flow_mod_file__(int argc OVS_UNUSED, char *argv[], uint16_t command)
{
enum nx_flow_format flow_format;
bool flow_mod_table_id;
struct list requests;
struct vconn *vconn;
FILE *file;
file = !strcmp(argv[2], "-") ? stdin : fopen(argv[2], "r");
if (file == NULL) {
ovs_fatal(errno, "%s: open", argv[2]);
}
list_init(&requests);
flow_format = set_initial_format_for_flow_mod(&requests);
flow_mod_table_id = false;
open_vconn(argv[1], &vconn);
while (parse_ofp_flow_mod_file(&requests, &flow_format, &flow_mod_table_id,
file, command)) {
check_final_format_for_flow_mod(flow_format);
transact_multiple_noreply(vconn, &requests);
}
vconn_close(vconn);
if (file != stdin) {
fclose(file);
}
}
static void
do_flow_mod__(int argc, char *argv[], uint16_t command)
{
enum nx_flow_format flow_format;
bool flow_mod_table_id;
struct list requests;
struct vconn *vconn;
if (argc > 2 && !strcmp(argv[2], "-")) {
do_flow_mod_file__(argc, argv, command);
return;
}
list_init(&requests);
flow_format = set_initial_format_for_flow_mod(&requests);
flow_mod_table_id = false;
parse_ofp_flow_mod_str(&requests, &flow_format, &flow_mod_table_id,
argc > 2 ? argv[2] : "", command, false);
check_final_format_for_flow_mod(flow_format);
open_vconn(argv[1], &vconn);
transact_multiple_noreply(vconn, &requests);
vconn_close(vconn);
}
static void
do_add_flow(int argc, char *argv[])
{
do_flow_mod__(argc, argv, OFPFC_ADD);
}
static void
do_add_flows(int argc, char *argv[])
{
do_flow_mod_file__(argc, argv, OFPFC_ADD);
}
static void
do_mod_flows(int argc, char *argv[])
{
do_flow_mod__(argc, argv, strict ? OFPFC_MODIFY_STRICT : OFPFC_MODIFY);
}
static void
do_del_flows(int argc, char *argv[])
{
do_flow_mod__(argc, argv, strict ? OFPFC_DELETE_STRICT : OFPFC_DELETE);
}
static void
monitor_vconn(struct vconn *vconn)
{
struct unixctl_server *server;
bool exiting = false;
int error, fd;
/* Daemonization will close stderr but we really want to keep it, so make a
* copy. */
fd = dup(STDERR_FILENO);
daemonize_start();
error = unixctl_server_create(NULL, &server);
if (error) {
ovs_fatal(error, "failed to create unixctl server");
}
unixctl_command_register("exit", "", 0, 0, ofctl_exit, &exiting);
daemonize_complete();
/* Now get stderr back. */
dup2(fd, STDERR_FILENO);
for (;;) {
struct ofpbuf *b;
int retval;
unixctl_server_run(server);
for (;;) {
retval = vconn_recv(vconn, &b);
if (retval == EAGAIN) {
break;
}
run(retval, "vconn_recv");
ofp_print(stderr, b->data, b->size, verbosity + 2);
ofpbuf_delete(b);
}
if (exiting) {
break;
}
vconn_run(vconn);
vconn_run_wait(vconn);
vconn_recv_wait(vconn);
unixctl_server_wait(server);
poll_block();
}
}
static void
do_monitor(int argc, char *argv[])
{
struct vconn *vconn;
open_vconn(argv[1], &vconn);
if (argc > 2) {
struct ofp_switch_config config;
fetch_switch_config(vconn, &config);
config.miss_send_len = htons(atoi(argv[2]));
set_switch_config(vconn, &config);
}
monitor_vconn(vconn);
}
static void
do_snoop(int argc OVS_UNUSED, char *argv[])
{
struct vconn *vconn;
open_vconn__(argv[1], "snoop", &vconn);
monitor_vconn(vconn);
}
static void
do_dump_ports(int argc, char *argv[])
{
struct ofp_port_stats_request *req;
struct ofpbuf *request;
uint16_t port;
req = alloc_stats_request(sizeof *req, OFPST_PORT, &request);
port = argc > 2 ? str_to_port_no(argv[1], argv[2]) : OFPP_NONE;
req->port_no = htons(port);
dump_stats_transaction(argv[1], request);
}
static void
do_probe(int argc OVS_UNUSED, char *argv[])
{
struct ofpbuf *request;
struct vconn *vconn;
struct ofpbuf *reply;
make_openflow(sizeof(struct ofp_header), OFPT_ECHO_REQUEST, &request);
open_vconn(argv[1], &vconn);
run(vconn_transact(vconn, request, &reply), "talking to %s", argv[1]);
if (reply->size != sizeof(struct ofp_header)) {
ovs_fatal(0, "reply does not match request");
}
ofpbuf_delete(reply);
vconn_close(vconn);
}
static void
do_mod_port(int argc OVS_UNUSED, char *argv[])
{
struct ofp_port_mod *opm;
struct ofp_phy_port opp;
struct ofpbuf *request;
struct vconn *vconn;
fetch_ofp_phy_port(argv[1], argv[2], &opp);
opm = make_openflow(sizeof(struct ofp_port_mod), OFPT_PORT_MOD, &request);
opm->port_no = opp.port_no;
memcpy(opm->hw_addr, opp.hw_addr, sizeof opm->hw_addr);
opm->config = htonl(0);
opm->mask = htonl(0);
opm->advertise = htonl(0);
if (!strcasecmp(argv[3], "up")) {
opm->mask |= htonl(OFPPC_PORT_DOWN);
} else if (!strcasecmp(argv[3], "down")) {
opm->mask |= htonl(OFPPC_PORT_DOWN);
opm->config |= htonl(OFPPC_PORT_DOWN);
} else if (!strcasecmp(argv[3], "flood")) {
opm->mask |= htonl(OFPPC_NO_FLOOD);
} else if (!strcasecmp(argv[3], "noflood")) {
opm->mask |= htonl(OFPPC_NO_FLOOD);
opm->config |= htonl(OFPPC_NO_FLOOD);
} else if (!strcasecmp(argv[3], "forward")) {
opm->mask |= htonl(OFPPC_NO_FWD);
} else if (!strcasecmp(argv[3], "noforward")) {
opm->mask |= htonl(OFPPC_NO_FWD);
opm->config |= htonl(OFPPC_NO_FWD);
} else {
ovs_fatal(0, "unknown mod-port command '%s'", argv[3]);
}
open_vconn(argv[1], &vconn);
transact_noreply(vconn, request);
vconn_close(vconn);
}
static void
do_get_frags(int argc OVS_UNUSED, char *argv[])
{
struct ofp_switch_config config;
struct vconn *vconn;
open_vconn(argv[1], &vconn);
fetch_switch_config(vconn, &config);
puts(ofputil_frag_handling_to_string(ntohs(config.flags)));
vconn_close(vconn);
}
static void
do_set_frags(int argc OVS_UNUSED, char *argv[])
{
struct ofp_switch_config config;
enum ofp_config_flags mode;
struct vconn *vconn;
ovs_be16 flags;
if (!ofputil_frag_handling_from_string(argv[2], &mode)) {
ovs_fatal(0, "%s: unknown fragment handling mode", argv[2]);
}
open_vconn(argv[1], &vconn);
fetch_switch_config(vconn, &config);
flags = htons(mode) | (config.flags & htons(~OFPC_FRAG_MASK));
if (flags != config.flags) {
/* Set the configuration. */
config.flags = flags;
set_switch_config(vconn, &config);
/* Then retrieve the configuration to see if it really took. OpenFlow
* doesn't define error reporting for bad modes, so this is all we can
* do. */
fetch_switch_config(vconn, &config);
if (flags != config.flags) {
ovs_fatal(0, "%s: setting fragment handling mode failed (this "
"switch probably doesn't support mode \"%s\")",
argv[1], ofputil_frag_handling_to_string(mode));
}
}
vconn_close(vconn);
}
static void
do_ping(int argc, char *argv[])
{
size_t max_payload = 65535 - sizeof(struct ofp_header);
unsigned int payload;
struct vconn *vconn;
int i;
payload = argc > 2 ? atoi(argv[2]) : 64;
if (payload > max_payload) {
ovs_fatal(0, "payload must be between 0 and %zu bytes", max_payload);
}
open_vconn(argv[1], &vconn);
for (i = 0; i < 10; i++) {
struct timeval start, end;
struct ofpbuf *request, *reply;
struct ofp_header *rq_hdr, *rpy_hdr;
rq_hdr = make_openflow(sizeof(struct ofp_header) + payload,
OFPT_ECHO_REQUEST, &request);
random_bytes(rq_hdr + 1, payload);
xgettimeofday(&start);
run(vconn_transact(vconn, ofpbuf_clone(request), &reply), "transact");
xgettimeofday(&end);
rpy_hdr = reply->data;
if (reply->size != request->size
|| memcmp(rpy_hdr + 1, rq_hdr + 1, payload)
|| rpy_hdr->xid != rq_hdr->xid
|| rpy_hdr->type != OFPT_ECHO_REPLY) {
printf("Reply does not match request. Request:\n");
ofp_print(stdout, request, request->size, verbosity + 2);
printf("Reply:\n");
ofp_print(stdout, reply, reply->size, verbosity + 2);
}
printf("%zu bytes from %s: xid=%08"PRIx32" time=%.1f ms\n",
reply->size - sizeof *rpy_hdr, argv[1], ntohl(rpy_hdr->xid),
(1000*(double)(end.tv_sec - start.tv_sec))
+ (.001*(end.tv_usec - start.tv_usec)));
ofpbuf_delete(request);
ofpbuf_delete(reply);
}
vconn_close(vconn);
}
static void
do_benchmark(int argc OVS_UNUSED, char *argv[])
{
size_t max_payload = 65535 - sizeof(struct ofp_header);
struct timeval start, end;
unsigned int payload_size, message_size;
struct vconn *vconn;
double duration;
int count;
int i;
payload_size = atoi(argv[2]);
if (payload_size > max_payload) {
ovs_fatal(0, "payload must be between 0 and %zu bytes", max_payload);
}
message_size = sizeof(struct ofp_header) + payload_size;
count = atoi(argv[3]);
printf("Sending %d packets * %u bytes (with header) = %u bytes total\n",
count, message_size, count * message_size);
open_vconn(argv[1], &vconn);
xgettimeofday(&start);
for (i = 0; i < count; i++) {
struct ofpbuf *request, *reply;
struct ofp_header *rq_hdr;
rq_hdr = make_openflow(message_size, OFPT_ECHO_REQUEST, &request);
memset(rq_hdr + 1, 0, payload_size);
run(vconn_transact(vconn, request, &reply), "transact");
ofpbuf_delete(reply);
}
xgettimeofday(&end);
vconn_close(vconn);
duration = ((1000*(double)(end.tv_sec - start.tv_sec))
+ (.001*(end.tv_usec - start.tv_usec)));
printf("Finished in %.1f ms (%.0f packets/s) (%.0f bytes/s)\n",
duration, count / (duration / 1000.0),
count * message_size / (duration / 1000.0));
}
static void
do_help(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
{
usage();
}
/* replace-flows and diff-flows commands. */
/* A flow table entry, possibly with two different versions. */
struct fte {
struct cls_rule rule; /* Within a "struct classifier". */
struct fte_version *versions[2];
};
/* One version of a Flow Table Entry. */
struct fte_version {
ovs_be64 cookie;
uint16_t idle_timeout;
uint16_t hard_timeout;
uint16_t flags;
union ofp_action *actions;
size_t n_actions;
};
/* Frees 'version' and the data that it owns. */
static void
fte_version_free(struct fte_version *version)
{
if (version) {
free(version->actions);
free(version);
}
}
/* Returns true if 'a' and 'b' are the same, false if they differ.
*
* Ignores differences in 'flags' because there's no way to retrieve flags from
* an OpenFlow switch. We have to assume that they are the same. */
static bool
fte_version_equals(const struct fte_version *a, const struct fte_version *b)
{
return (a->cookie == b->cookie
&& a->idle_timeout == b->idle_timeout
&& a->hard_timeout == b->hard_timeout
&& a->n_actions == b->n_actions
&& !memcmp(a->actions, b->actions,
a->n_actions * sizeof *a->actions));
}
/* Prints 'version' on stdout. Expects the caller to have printed the rule
* associated with the version. */
static void
fte_version_print(const struct fte_version *version)
{
struct ds s;
if (version->cookie != htonll(0)) {
printf(" cookie=0x%"PRIx64, ntohll(version->cookie));
}
if (version->idle_timeout != OFP_FLOW_PERMANENT) {
printf(" idle_timeout=%"PRIu16, version->idle_timeout);
}
if (version->hard_timeout != OFP_FLOW_PERMANENT) {
printf(" hard_timeout=%"PRIu16, version->hard_timeout);
}
ds_init(&s);
ofp_print_actions(&s, version->actions, version->n_actions);
printf(" %s\n", ds_cstr(&s));
ds_destroy(&s);
}
static struct fte *
fte_from_cls_rule(const struct cls_rule *cls_rule)
{
return cls_rule ? CONTAINER_OF(cls_rule, struct fte, rule) : NULL;
}
/* Frees 'fte' and its versions. */
static void
fte_free(struct fte *fte)
{
if (fte) {
fte_version_free(fte->versions[0]);
fte_version_free(fte->versions[1]);
free(fte);
}
}
/* Frees all of the FTEs within 'cls'. */
static void
fte_free_all(struct classifier *cls)
{
struct cls_cursor cursor;
struct fte *fte, *next;
cls_cursor_init(&cursor, cls, NULL);
CLS_CURSOR_FOR_EACH_SAFE (fte, next, rule, &cursor) {
classifier_remove(cls, &fte->rule);
fte_free(fte);
}
}
/* Searches 'cls' for an FTE matching 'rule', inserting a new one if
* necessary. Sets 'version' as the version of that rule with the given
* 'index', replacing any existing version, if any.
*
* Takes ownership of 'version'. */
static void
fte_insert(struct classifier *cls, const struct cls_rule *rule,
struct fte_version *version, int index)
{
struct fte *old, *fte;
fte = xzalloc(sizeof *fte);
fte->rule = *rule;
fte->versions[index] = version;
old = fte_from_cls_rule(classifier_replace(cls, &fte->rule));
if (old) {
fte_version_free(old->versions[index]);
fte->versions[!index] = old->versions[!index];
free(old);
}
}
/* Reads the flows in 'filename' as flow table entries in 'cls' for the version
* with the specified 'index'. Returns the minimum flow format required to
* represent the flows that were read. */
static enum nx_flow_format
read_flows_from_file(const char *filename, struct classifier *cls, int index)
{
enum nx_flow_format min_flow_format;
struct ds s;
FILE *file;
file = !strcmp(filename, "-") ? stdin : fopen(filename, "r");
if (file == NULL) {
ovs_fatal(errno, "%s: open", filename);
}
ds_init(&s);
min_flow_format = NXFF_OPENFLOW10;
while (!ds_get_preprocessed_line(&s, file)) {
struct fte_version *version;
struct ofputil_flow_mod fm;
enum nx_flow_format min_ff;
parse_ofp_str(&fm, OFPFC_ADD, ds_cstr(&s), true);
version = xmalloc(sizeof *version);
version->cookie = fm.cookie;
version->idle_timeout = fm.idle_timeout;
version->hard_timeout = fm.hard_timeout;
version->flags = fm.flags & (OFPFF_SEND_FLOW_REM | OFPFF_EMERG);
version->actions = fm.actions;
version->n_actions = fm.n_actions;
min_ff = ofputil_min_flow_format(&fm.cr);
min_flow_format = MAX(min_flow_format, min_ff);
check_final_format_for_flow_mod(min_flow_format);
fte_insert(cls, &fm.cr, version, index);
}
ds_destroy(&s);
if (file != stdin) {
fclose(file);
}
return min_flow_format;
}
/* Reads the OpenFlow flow table from 'vconn', which has currently active flow
* format 'flow_format', and adds them as flow table entries in 'cls' for the
* version with the specified 'index'. */
static void
read_flows_from_switch(struct vconn *vconn, enum nx_flow_format flow_format,
struct classifier *cls, int index)
{
struct ofputil_flow_stats_request fsr;
struct ofpbuf *request;
ovs_be32 send_xid;
bool done;
fsr.aggregate = false;
cls_rule_init_catchall(&fsr.match, 0);
fsr.out_port = OFPP_NONE;
fsr.table_id = 0xff;
fsr.cookie = fsr.cookie_mask = htonll(0);
request = ofputil_encode_flow_stats_request(&fsr, flow_format);
send_xid = ((struct ofp_header *) request->data)->xid;
send_openflow_buffer(vconn, request);
done = false;
while (!done) {
ovs_be32 recv_xid;
struct ofpbuf *reply;
run(vconn_recv_block(vconn, &reply), "OpenFlow packet receive failed");
recv_xid = ((struct ofp_header *) reply->data)->xid;
if (send_xid == recv_xid) {
const struct ofputil_msg_type *type;
const struct ofp_stats_msg *osm;
enum ofputil_msg_code code;
ofputil_decode_msg_type(reply->data, &type);
code = ofputil_msg_type_code(type);
if (code != OFPUTIL_OFPST_FLOW_REPLY &&
code != OFPUTIL_NXST_FLOW_REPLY) {
ovs_fatal(0, "received bad reply: %s",
ofp_to_string(reply->data, reply->size,
verbosity + 1));
}
osm = reply->data;
if (!(osm->flags & htons(OFPSF_REPLY_MORE))) {
done = true;
}
for (;;) {
struct fte_version *version;
struct ofputil_flow_stats fs;
int retval;
retval = ofputil_decode_flow_stats_reply(&fs, reply);
if (retval) {
if (retval != EOF) {
ovs_fatal(0, "parse error in reply");
}
break;
}
version = xmalloc(sizeof *version);
version->cookie = fs.cookie;
version->idle_timeout = fs.idle_timeout;
version->hard_timeout = fs.hard_timeout;
version->flags = 0;
version->n_actions = fs.n_actions;
version->actions = xmemdup(fs.actions,
fs.n_actions * sizeof *fs.actions);
fte_insert(cls, &fs.rule, version, index);
}
} else {
VLOG_DBG("received reply with xid %08"PRIx32" "
"!= expected %08"PRIx32, recv_xid, send_xid);
}
ofpbuf_delete(reply);
}
}
static void
fte_make_flow_mod(const struct fte *fte, int index, uint16_t command,
enum nx_flow_format flow_format, struct list *packets)
{
const struct fte_version *version = fte->versions[index];
struct ofputil_flow_mod fm;
struct ofpbuf *ofm;
fm.cr = fte->rule;
fm.cookie = version->cookie;
fm.table_id = 0xff;
fm.command = command;
fm.idle_timeout = version->idle_timeout;
fm.hard_timeout = version->hard_timeout;
fm.buffer_id = UINT32_MAX;
fm.out_port = OFPP_NONE;
fm.flags = version->flags;
if (command == OFPFC_ADD || command == OFPFC_MODIFY ||
command == OFPFC_MODIFY_STRICT) {
fm.actions = version->actions;
fm.n_actions = version->n_actions;
} else {
fm.actions = NULL;
fm.n_actions = 0;
}
ofm = ofputil_encode_flow_mod(&fm, flow_format, false);
list_push_back(packets, &ofm->list_node);
}
static void
do_replace_flows(int argc OVS_UNUSED, char *argv[])
{
enum { FILE_IDX = 0, SWITCH_IDX = 1 };
enum nx_flow_format min_flow_format, flow_format;
struct cls_cursor cursor;
struct classifier cls;
struct list requests;
struct vconn *vconn;
struct fte *fte;
classifier_init(&cls);
min_flow_format = read_flows_from_file(argv[2], &cls, FILE_IDX);
open_vconn(argv[1], &vconn);
flow_format = negotiate_highest_flow_format(vconn, min_flow_format);
read_flows_from_switch(vconn, flow_format, &cls, SWITCH_IDX);
list_init(&requests);
/* Delete flows that exist on the switch but not in the file. */
cls_cursor_init(&cursor, &cls, NULL);
CLS_CURSOR_FOR_EACH (fte, rule, &cursor) {
struct fte_version *file_ver = fte->versions[FILE_IDX];
struct fte_version *sw_ver = fte->versions[SWITCH_IDX];
if (sw_ver && !file_ver) {
fte_make_flow_mod(fte, SWITCH_IDX, OFPFC_DELETE_STRICT,
flow_format, &requests);
}
}
/* Add flows that exist in the file but not on the switch.
* Update flows that exist in both places but differ. */
cls_cursor_init(&cursor, &cls, NULL);
CLS_CURSOR_FOR_EACH (fte, rule, &cursor) {
struct fte_version *file_ver = fte->versions[FILE_IDX];
struct fte_version *sw_ver = fte->versions[SWITCH_IDX];
if (file_ver
&& (readd || !sw_ver || !fte_version_equals(sw_ver, file_ver))) {
fte_make_flow_mod(fte, FILE_IDX, OFPFC_ADD, flow_format,
&requests);
}
}
transact_multiple_noreply(vconn, &requests);
vconn_close(vconn);
fte_free_all(&cls);
}
static void
read_flows_from_source(const char *source, struct classifier *cls, int index)
{
struct stat s;
if (source[0] == '/' || source[0] == '.'
|| (!strchr(source, ':') && !stat(source, &s))) {
read_flows_from_file(source, cls, index);
} else {
enum nx_flow_format flow_format;
struct vconn *vconn;
open_vconn(source, &vconn);
flow_format = negotiate_highest_flow_format(vconn, NXFF_OPENFLOW10);
read_flows_from_switch(vconn, flow_format, cls, index);
vconn_close(vconn);
}
}
static void
do_diff_flows(int argc OVS_UNUSED, char *argv[])
{
bool differences = false;
struct cls_cursor cursor;
struct classifier cls;
struct fte *fte;
classifier_init(&cls);
read_flows_from_source(argv[1], &cls, 0);
read_flows_from_source(argv[2], &cls, 1);
cls_cursor_init(&cursor, &cls, NULL);
CLS_CURSOR_FOR_EACH (fte, rule, &cursor) {
struct fte_version *a = fte->versions[0];
struct fte_version *b = fte->versions[1];
if (!a || !b || !fte_version_equals(a, b)) {
char *rule_s = cls_rule_to_string(&fte->rule);
if (a) {
printf("-%s", rule_s);
fte_version_print(a);
}
if (b) {
printf("+%s", rule_s);
fte_version_print(b);
}
free(rule_s);
differences = true;
}
}
fte_free_all(&cls);
if (differences) {
exit(2);
}
}
/* Undocumented commands for unit testing. */
static void
print_packet_list(struct list *packets)
{
struct ofpbuf *packet, *next;
LIST_FOR_EACH_SAFE (packet, next, list_node, packets) {
ofp_print(stdout, packet->data, packet->size, verbosity);
list_remove(&packet->list_node);
ofpbuf_delete(packet);
}
}
/* "parse-flow FLOW": parses the argument as a flow (like add-flow) and prints
* it back to stdout. */
static void
do_parse_flow(int argc OVS_UNUSED, char *argv[])
{
enum nx_flow_format flow_format;
bool flow_mod_table_id;
struct list packets;
flow_format = NXFF_OPENFLOW10;
if (preferred_flow_format > 0) {
flow_format = preferred_flow_format;
}
flow_mod_table_id = false;
list_init(&packets);
parse_ofp_flow_mod_str(&packets, &flow_format, &flow_mod_table_id,
argv[1], OFPFC_ADD, false);
print_packet_list(&packets);
}
/* "parse-flows FILENAME": reads the named file as a sequence of flows (like
* add-flows) and prints each of the flows back to stdout. */
static void
do_parse_flows(int argc OVS_UNUSED, char *argv[])
{
enum nx_flow_format flow_format;
bool flow_mod_table_id;
struct list packets;
FILE *file;
file = fopen(argv[1], "r");
if (file == NULL) {
ovs_fatal(errno, "%s: open", argv[1]);
}
flow_format = NXFF_OPENFLOW10;
if (preferred_flow_format > 0) {
flow_format = preferred_flow_format;
}
flow_mod_table_id = false;
list_init(&packets);
while (parse_ofp_flow_mod_file(&packets, &flow_format, &flow_mod_table_id,
file, OFPFC_ADD)) {
print_packet_list(&packets);
}
fclose(file);
}
/* "parse-nx-match": reads a series of nx_match specifications as strings from
* stdin, does some internal fussing with them, and then prints them back as
* strings on stdout. */
static void
do_parse_nx_match(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
{
struct ds in;
ds_init(&in);
while (!ds_get_line(&in, stdin)) {
struct ofpbuf nx_match;
struct cls_rule rule;
ovs_be64 cookie, cookie_mask;
int match_len;
int error;
char *s;
/* Delete comments, skip blank lines. */
s = ds_cstr(&in);
if (*s == '#') {
puts(s);
continue;
}
if (strchr(s, '#')) {
*strchr(s, '#') = '\0';
}
if (s[strspn(s, " ")] == '\0') {
putchar('\n');
continue;
}
/* Convert string to nx_match. */
ofpbuf_init(&nx_match, 0);
match_len = nx_match_from_string(ds_cstr(&in), &nx_match);
/* Convert nx_match to cls_rule. */
error = nx_pull_match(&nx_match, match_len, 0, &rule,
&cookie, &cookie_mask);
if (!error) {
char *out;
/* Convert cls_rule back to nx_match. */
ofpbuf_uninit(&nx_match);
ofpbuf_init(&nx_match, 0);
match_len = nx_put_match(&nx_match, &rule, cookie, cookie_mask);
/* Convert nx_match to string. */
out = nx_match_to_string(nx_match.data, match_len);
puts(out);
free(out);
} else {
printf("nx_pull_match() returned error %x (%s)\n", error,
ofputil_error_to_string(error));
}
ofpbuf_uninit(&nx_match);
}
ds_destroy(&in);
}
/* "ofp-print HEXSTRING [VERBOSITY]": Converts the hex digits in HEXSTRING into
* binary data, interpreting them as an OpenFlow message, and prints the
* OpenFlow message on stdout, at VERBOSITY (level 2 by default). */
static void
do_ofp_print(int argc, char *argv[])
{
struct ofpbuf packet;
ofpbuf_init(&packet, strlen(argv[1]) / 2);
if (ofpbuf_put_hex(&packet, argv[1], NULL)[0] != '\0') {
ovs_fatal(0, "trailing garbage following hex bytes");
}
ofp_print(stdout, packet.data, packet.size, argc > 2 ? atoi(argv[2]) : 2);
ofpbuf_uninit(&packet);
}
static const struct command all_commands[] = {
{ "show", 1, 1, do_show },
{ "monitor", 1, 2, do_monitor },
{ "snoop", 1, 1, do_snoop },
{ "dump-desc", 1, 1, do_dump_desc },
{ "dump-tables", 1, 1, do_dump_tables },
{ "dump-flows", 1, 2, do_dump_flows },
{ "dump-aggregate", 1, 2, do_dump_aggregate },
{ "queue-stats", 1, 3, do_queue_stats },
{ "add-flow", 2, 2, do_add_flow },
{ "add-flows", 2, 2, do_add_flows },
{ "mod-flows", 2, 2, do_mod_flows },
{ "del-flows", 1, 2, do_del_flows },
{ "replace-flows", 2, 2, do_replace_flows },
{ "diff-flows", 2, 2, do_diff_flows },
{ "dump-ports", 1, 2, do_dump_ports },
{ "mod-port", 3, 3, do_mod_port },
{ "get-frags", 1, 1, do_get_frags },
{ "set-frags", 2, 2, do_set_frags },
{ "probe", 1, 1, do_probe },
{ "ping", 1, 2, do_ping },
{ "benchmark", 3, 3, do_benchmark },
{ "help", 0, INT_MAX, do_help },
/* Undocumented commands for testing. */
{ "parse-flow", 1, 1, do_parse_flow },
{ "parse-flows", 1, 1, do_parse_flows },
{ "parse-nx-match", 0, 0, do_parse_nx_match },
{ "ofp-print", 1, 2, do_ofp_print },
{ NULL, 0, 0, NULL },
};
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