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ovs-ofctl.c
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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 <ctype.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/fcntl.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 "nx-match.h"
#include "odp-util.h"
#include "ofp-actions.h"
#include "ofp-errors.h"
#include "ofp-msgs.h"
#include "ofp-parse.h"
#include "ofp-print.h"
#include "ofp-util.h"
#include "ofp-version-opt.h"
#include "ofpbuf.h"
#include "ofproto/ofproto.h"
#include "openflow/nicira-ext.h"
#include "openflow/openflow.h"
#include "packets.h"
#include "pcap-file.h"
#include "poll-loop.h"
#include "random.h"
#include "stream-ssl.h"
#include "socket-util.h"
#include "timeval.h"
#include "unixctl.h"
#include "util.h"
#include "vconn.h"
#include "vlog.h"
#include "meta-flow.h"
#include "sort.h"
VLOG_DEFINE_THIS_MODULE(ofctl);
/* --strict: Use strict matching for flow mod commands? Additionally governs
* use of nx_pull_match() instead of nx_pull_match_loose() in parse-nx-match.
*/
static bool strict;
/* --readd: If true, on replace-flows, re-add even flows that have not changed
* (to reset flow counters). */
static bool readd;
/* -F, --flow-format: Allowed protocols. By default, any protocol is
* allowed. */
static enum ofputil_protocol allowed_protocols = OFPUTIL_P_ANY;
/* -P, --packet-in-format: Packet IN format to use in monitor and snoop
* commands. Either one of NXPIF_* to force a particular packet_in format, or
* -1 to let ovs-ofctl choose the default. */
static int preferred_packet_in_format = -1;
/* -m, --more: Additional verbosity for ofp-print functions. */
static int verbosity;
/* --timestamp: Print a timestamp before each received packet on "monitor" and
* "snoop" command? */
static bool timestamp;
/* --sort, --rsort: Sort order. */
enum sort_order { SORT_ASC, SORT_DESC };
struct sort_criterion {
const struct mf_field *field; /* NULL means to sort by priority. */
enum sort_order order;
};
static struct sort_criterion *criteria;
static size_t n_criteria, allocated_criteria;
static const struct command *get_all_commands(void);
static void usage(void) NO_RETURN;
static void parse_options(int argc, char *argv[]);
static bool recv_flow_stats_reply(struct vconn *, ovs_be32 send_xid,
struct ofpbuf **replyp,
struct ofputil_flow_stats *,
struct ofpbuf *ofpacts);
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, get_all_commands());
return 0;
}
static void
add_sort_criterion(enum sort_order order, const char *field)
{
struct sort_criterion *sc;
if (n_criteria >= allocated_criteria) {
criteria = x2nrealloc(criteria, &allocated_criteria, sizeof *criteria);
}
sc = &criteria[n_criteria++];
if (!field || !strcasecmp(field, "priority")) {
sc->field = NULL;
} else {
sc->field = mf_from_name(field);
if (!sc->field) {
ovs_fatal(0, "%s: unknown field name", field);
}
}
sc->order = order;
}
static void
parse_options(int argc, char *argv[])
{
enum {
OPT_STRICT = UCHAR_MAX + 1,
OPT_READD,
OPT_TIMESTAMP,
OPT_SORT,
OPT_RSORT,
DAEMON_OPTION_ENUMS,
OFP_VERSION_OPTION_ENUMS,
VLOG_OPTION_ENUMS
};
static const 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'},
{"packet-in-format", required_argument, NULL, 'P'},
{"more", no_argument, NULL, 'm'},
{"timestamp", no_argument, NULL, OPT_TIMESTAMP},
{"sort", optional_argument, NULL, OPT_SORT},
{"rsort", optional_argument, NULL, OPT_RSORT},
{"help", no_argument, NULL, 'h'},
DAEMON_LONG_OPTIONS,
OFP_VERSION_LONG_OPTIONS,
VLOG_LONG_OPTIONS,
STREAM_SSL_LONG_OPTIONS,
{NULL, 0, NULL, 0},
};
char *short_options = long_options_to_short_options(long_options);
uint32_t versions;
enum ofputil_protocol version_protocols;
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':
allowed_protocols = ofputil_protocols_from_string(optarg);
if (!allowed_protocols) {
ovs_fatal(0, "%s: invalid flow format(s)", optarg);
}
break;
case 'P':
preferred_packet_in_format =
ofputil_packet_in_format_from_string(optarg);
if (preferred_packet_in_format < 0) {
ovs_fatal(0, "unknown packet-in format `%s'", optarg);
}
break;
case 'm':
verbosity++;
break;
case 'h':
usage();
case OPT_STRICT:
strict = true;
break;
case OPT_READD:
readd = true;
break;
case OPT_TIMESTAMP:
timestamp = true;
break;
case OPT_SORT:
add_sort_criterion(SORT_ASC, optarg);
break;
case OPT_RSORT:
add_sort_criterion(SORT_DESC, optarg);
break;
DAEMON_OPTION_HANDLERS
OFP_VERSION_OPTION_HANDLERS
VLOG_OPTION_HANDLERS
STREAM_SSL_OPTION_HANDLERS
case '?':
exit(EXIT_FAILURE);
default:
abort();
}
}
if (n_criteria) {
/* Always do a final sort pass based on priority. */
add_sort_criterion(SORT_DESC, "priority");
}
free(short_options);
versions = get_allowed_ofp_versions();
version_protocols = ofputil_protocols_from_version_bitmap(versions);
if (!(allowed_protocols & version_protocols)) {
char *protocols = ofputil_protocols_to_string(allowed_protocols);
struct ds version_s = DS_EMPTY_INITIALIZER;
ofputil_format_version_bitmap_names(&version_s, versions);
ovs_fatal(0, "None of the enabled OpenFlow versions (%s) supports "
"any of the enabled flow formats (%s). (Use -O to enable "
"additional OpenFlow versions or -F to enable additional "
"flow formats.)", ds_cstr(&version_s), protocols);
}
allowed_protocols &= version_protocols;
mask_allowed_ofp_versions(ofputil_protocols_to_version_bitmap(
allowed_protocols));
}
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"
" mod-table SWITCH MOD modify flow table 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-ports-desc SWITCH print port descriptions\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"
" diff-flows SOURCE1 SOURCE2 compare flows from two sources\n"
" packet-out SWITCH IN_PORT ACTIONS PACKET...\n"
" execute ACTIONS on PACKET\n"
" monitor SWITCH [MISSLEN] [invalid_ttl] [watch:[...]]\n"
" print packets received from SWITCH\n"
" snoop SWITCH snoop on SWITCH and its controller\n"
" add-group SWITCH GROUP add group described by GROUP\n"
" add-group SWITCH FILE add group from FILE\n"
" mod-group SWITCH GROUP modify specific group\n"
" del-groups SWITCH [GROUP] delete matching GROUPs\n"
" dump-group-features SWITCH print group features\n"
" dump-groups SWITCH print group description\n"
" dump-group-stats SWITCH [GROUP] print group statistics\n"
" queue-get-config SWITCH PORT print queue information for port\n"
" add-meter SWITCH METER add meter described by METER\n"
" mod-meter SWITCH METER modify specific METER\n"
" del-meter SWITCH METER delete METER\n"
" del-meters SWITCH delete all meters\n"
" dump-meter SWITCH METER print METER configuration\n"
" dump-meters SWITCH print all meter configuration\n"
" meter-stats SWITCH [METER] print meter statistics\n"
" meter-features SWITCH print meter features\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"
"SWITCH or TARGET is an active OpenFlow connection method.\n"
"\nOther commands:\n"
" ofp-parse FILE print messages read from FILE\n"
" ofp-parse-pcap PCAP print OpenFlow read from PCAP\n",
program_name, program_name);
vconn_usage(true, false, false);
daemon_usage();
ofp_version_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"
" -P, --packet-in-format=FRMT force particular packet in format\n"
" -m, --more be more verbose printing OpenFlow\n"
" --timestamp (monitor, snoop) print timestamps\n"
" -t, --timeout=SECS give up after SECS seconds\n"
" --sort[=field] sort in ascending order\n"
" --rsort[=field] sort in descending order\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, NULL);
}
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 int
open_vconn_socket(const char *name, struct vconn **vconnp)
{
char *vconn_name = xasprintf("unix:%s", name);
int error;
error = vconn_open(vconn_name, get_allowed_ofp_versions(), DSCP_DEFAULT,
vconnp);
if (error && error != ENOENT) {
ovs_fatal(0, "%s: failed to open socket (%s)", name,
ovs_strerror(error));
}
free(vconn_name);
return error;
}
enum open_target { MGMT, SNOOP };
static enum ofputil_protocol
open_vconn__(const char *name, enum open_target target,
struct vconn **vconnp)
{
const char *suffix = target == MGMT ? "mgmt" : "snoop";
char *datapath_name, *datapath_type, *socket_name;
enum ofputil_protocol protocol;
char *bridge_path;
int ofp_version;
int error;
bridge_path = xasprintf("%s/%s.%s", ovs_rundir(), name, suffix);
ofproto_parse_name(name, &datapath_name, &datapath_type);
socket_name = xasprintf("%s/%s.%s", ovs_rundir(), datapath_name, suffix);
free(datapath_name);
free(datapath_type);
if (strchr(name, ':')) {
run(vconn_open(name, get_allowed_ofp_versions(), DSCP_DEFAULT, vconnp),
"connecting to %s", name);
} else if (!open_vconn_socket(name, vconnp)) {
/* Fall Through. */
} else if (!open_vconn_socket(bridge_path, vconnp)) {
/* Fall Through. */
} else if (!open_vconn_socket(socket_name, vconnp)) {
/* Fall Through. */
} else {
ovs_fatal(0, "%s is not a bridge or a socket", name);
}
if (target == SNOOP) {
vconn_set_recv_any_version(*vconnp);
}
free(bridge_path);
free(socket_name);
VLOG_DBG("connecting to %s", vconn_get_name(*vconnp));
error = vconn_connect_block(*vconnp);
if (error) {
ovs_fatal(0, "%s: failed to connect to socket (%s)", name,
ovs_strerror(error));
}
ofp_version = vconn_get_version(*vconnp);
protocol = ofputil_protocol_from_ofp_version(ofp_version);
if (!protocol) {
ovs_fatal(0, "%s: unsupported OpenFlow version 0x%02x",
name, ofp_version);
}
return protocol;
}
static enum ofputil_protocol
open_vconn(const char *name, struct vconn **vconnp)
{
return open_vconn__(name, MGMT, vconnp);
}
static void
send_openflow_buffer(struct vconn *vconn, struct ofpbuf *buffer)
{
ofpmsg_update_length(buffer);
run(vconn_send_block(vconn, buffer), "failed to send packet to switch");
}
static void
dump_transaction(struct vconn *vconn, struct ofpbuf *request)
{
struct ofpbuf *reply;
ofpmsg_update_length(request);
run(vconn_transact(vconn, request, &reply), "talking to %s",
vconn_get_name(vconn));
ofp_print(stdout, reply->data, reply->size, verbosity + 1);
ofpbuf_delete(reply);
}
static void
dump_trivial_transaction(const char *vconn_name, enum ofpraw raw)
{
struct ofpbuf *request;
struct vconn *vconn;
open_vconn(vconn_name, &vconn);
request = ofpraw_alloc(raw, vconn_get_version(vconn), 0);
dump_transaction(vconn, request);
vconn_close(vconn);
}
static void
dump_stats_transaction(struct vconn *vconn, struct ofpbuf *request)
{
const struct ofp_header *request_oh = request->data;
ovs_be32 send_xid = request_oh->xid;
enum ofpraw request_raw;
enum ofpraw reply_raw;
bool done = false;
ofpraw_decode_partial(&request_raw, request->data, request->size);
reply_raw = ofpraw_stats_request_to_reply(request_raw,
request_oh->version);
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) {
enum ofpraw raw;
ofp_print(stdout, reply->data, reply->size, verbosity + 1);
ofpraw_decode(&raw, reply->data);
if (ofptype_from_ofpraw(raw) == OFPTYPE_ERROR) {
done = true;
} else if (raw == reply_raw) {
done = !ofpmp_more(reply->data);
} else {
ovs_fatal(0, "received bad reply: %s",
ofp_to_string(reply->data, reply->size,
verbosity + 1));
}
} else {
VLOG_DBG("received reply with xid %08"PRIx32" "
"!= expected %08"PRIx32, recv_xid, send_xid);
}
ofpbuf_delete(reply);
}
}
static void
dump_trivial_stats_transaction(const char *vconn_name, enum ofpraw raw)
{
struct ofpbuf *request;
struct vconn *vconn;
open_vconn(vconn_name, &vconn);
request = ofpraw_alloc(raw, vconn_get_version(vconn), 0);
dump_stats_transaction(vconn, request);
vconn_close(vconn);
}
/* Sends all of the 'requests', which should be requests that only have replies
* if an error occurs, and waits for them 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) {
ofpmsg_update_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 ofpbuf *request;
struct ofpbuf *reply;
enum ofptype type;
request = ofpraw_alloc(OFPRAW_OFPT_GET_CONFIG_REQUEST,
vconn_get_version(vconn), 0);
run(vconn_transact(vconn, request, &reply),
"talking to %s", vconn_get_name(vconn));
if (ofptype_pull(&type, reply) || type != OFPTYPE_GET_CONFIG_REPLY) {
ovs_fatal(0, "%s: bad reply to config request", vconn_get_name(vconn));
}
config = ofpbuf_pull(reply, sizeof *config);
*config_ = *config;
ofpbuf_delete(reply);
}
static void
set_switch_config(struct vconn *vconn, const struct ofp_switch_config *config)
{
struct ofpbuf *request;
request = ofpraw_alloc(OFPRAW_OFPT_SET_CONFIG, vconn_get_version(vconn), 0);
ofpbuf_put(request, config, sizeof *config);
transact_noreply(vconn, request);
}
static void
ofctl_show(int argc OVS_UNUSED, char *argv[])
{
const char *vconn_name = argv[1];
struct vconn *vconn;
struct ofpbuf *request;
struct ofpbuf *reply;
bool trunc;
open_vconn(vconn_name, &vconn);
request = ofpraw_alloc(OFPRAW_OFPT_FEATURES_REQUEST,
vconn_get_version(vconn), 0);
run(vconn_transact(vconn, request, &reply), "talking to %s", vconn_name);
trunc = ofputil_switch_features_ports_trunc(reply);
ofp_print(stdout, reply->data, reply->size, verbosity + 1);
ofpbuf_delete(reply);
if (trunc) {
/* The Features Reply may not contain all the ports, so send a
* Port Description stats request, which doesn't have size
* constraints. */
dump_trivial_stats_transaction(vconn_name,
OFPRAW_OFPST_PORT_DESC_REQUEST);
}
dump_trivial_transaction(vconn_name, OFPRAW_OFPT_GET_CONFIG_REQUEST);
vconn_close(vconn);
}
static void
ofctl_dump_desc(int argc OVS_UNUSED, char *argv[])
{
dump_trivial_stats_transaction(argv[1], OFPRAW_OFPST_DESC_REQUEST);
}
static void
ofctl_dump_tables(int argc OVS_UNUSED, char *argv[])
{
dump_trivial_stats_transaction(argv[1], OFPRAW_OFPST_TABLE_REQUEST);
}
static bool
fetch_port_by_features(const char *vconn_name,
const char *port_name, ofp_port_t port_no,
struct ofputil_phy_port *pp, bool *trunc)
{
struct ofputil_switch_features features;
const struct ofp_header *oh;
struct ofpbuf *request, *reply;
struct vconn *vconn;
enum ofperr error;
enum ofptype type;
struct ofpbuf b;
bool found = false;
/* Fetch the switch's ofp_switch_features. */
open_vconn(vconn_name, &vconn);
request = ofpraw_alloc(OFPRAW_OFPT_FEATURES_REQUEST,
vconn_get_version(vconn), 0);
run(vconn_transact(vconn, request, &reply), "talking to %s", vconn_name);
vconn_close(vconn);
oh = reply->data;
if (ofptype_decode(&type, reply->data)
|| type != OFPTYPE_FEATURES_REPLY) {
ovs_fatal(0, "%s: received bad features reply", vconn_name);
}
*trunc = false;
if (ofputil_switch_features_ports_trunc(reply)) {
*trunc = true;
goto exit;
}
error = ofputil_decode_switch_features(oh, &features, &b);
if (error) {
ovs_fatal(0, "%s: failed to decode features reply (%s)",
vconn_name, ofperr_to_string(error));
}
while (!ofputil_pull_phy_port(oh->version, &b, pp)) {
if (port_no != OFPP_NONE
? port_no == pp->port_no
: !strcmp(pp->name, port_name)) {
found = true;
goto exit;
}
}
exit:
ofpbuf_delete(reply);
return found;
}
static bool
fetch_port_by_stats(const char *vconn_name,
const char *port_name, ofp_port_t port_no,
struct ofputil_phy_port *pp)
{
struct ofpbuf *request;
struct vconn *vconn;
ovs_be32 send_xid;
bool done = false;
bool found = false;
request = ofpraw_alloc(OFPRAW_OFPST_PORT_DESC_REQUEST, OFP10_VERSION, 0);
send_xid = ((struct ofp_header *) request->data)->xid;
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_header *oh = reply->data;
enum ofptype type;
struct ofpbuf b;
uint16_t flags;
ofpbuf_use_const(&b, oh, ntohs(oh->length));
if (ofptype_pull(&type, &b)
|| type != OFPTYPE_PORT_DESC_STATS_REPLY) {
ovs_fatal(0, "received bad reply: %s",
ofp_to_string(reply->data, reply->size,
verbosity + 1));
}
flags = ofpmp_flags(oh);
done = !(flags & OFPSF_REPLY_MORE);
if (found) {
/* We've already found the port, but we need to drain
* the queue of any other replies for this request. */
continue;
}
while (!ofputil_pull_phy_port(oh->version, &b, pp)) {
if (port_no != OFPP_NONE ? port_no == pp->port_no
: !strcmp(pp->name, port_name)) {
found = true;
break;
}
}
} else {
VLOG_DBG("received reply with xid %08"PRIx32" "
"!= expected %08"PRIx32, recv_xid, send_xid);
}
ofpbuf_delete(reply);
}
vconn_close(vconn);
return found;
}
static bool
str_to_ofp(const char *s, ofp_port_t *ofp_port)
{
bool ret;
uint32_t port_;
ret = str_to_uint(s, 10, &port_);
*ofp_port = u16_to_ofp(port_);
return ret;
}
/* Opens a connection to 'vconn_name', fetches the port structure for
* 'port_name' (which may be a port name or number), and copies it into
* '*pp'. */
static void
fetch_ofputil_phy_port(const char *vconn_name, const char *port_name,
struct ofputil_phy_port *pp)
{
ofp_port_t port_no;
bool found;
bool trunc;
/* Try to interpret the argument as a port number. */
if (!str_to_ofp(port_name, &port_no)) {
port_no = OFPP_NONE;
}
/* Try to find the port based on the Features Reply. If it looks
* like the results may be truncated, then use the Port Description
* stats message introduced in OVS 1.7. */
found = fetch_port_by_features(vconn_name, port_name, port_no, pp,
&trunc);
if (trunc) {
found = fetch_port_by_stats(vconn_name, port_name, port_no, pp);
}
if (!found) {
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 ofp_port_t
str_to_port_no(const char *vconn_name, const char *port_name)
{
ofp_port_t port_no;
if (ofputil_port_from_string(port_name, &port_no)) {
return port_no;
} else {
struct ofputil_phy_port pp;
fetch_ofputil_phy_port(vconn_name, port_name, &pp);
return pp.port_no;
}
}
static bool
try_set_protocol(struct vconn *vconn, enum ofputil_protocol want,
enum ofputil_protocol *cur)
{
for (;;) {
struct ofpbuf *request, *reply;
enum ofputil_protocol next;
request = ofputil_encode_set_protocol(*cur, want, &next);
if (!request) {
return *cur == want;
}
run(vconn_transact_noreply(vconn, request, &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 protocol, switch replied: %s",
vconn_get_name(vconn), s);
free(s);
ofpbuf_delete(reply);
return false;
}
*cur = next;
}
}
static enum ofputil_protocol
set_protocol_for_flow_dump(struct vconn *vconn,
enum ofputil_protocol cur_protocol,
enum ofputil_protocol usable_protocols)
{
char *usable_s;
int i;
for (i = 0; i < ofputil_n_flow_dump_protocols; i++) {
enum ofputil_protocol f = ofputil_flow_dump_protocols[i];
if (f & usable_protocols & allowed_protocols
&& try_set_protocol(vconn, f, &cur_protocol)) {
return f;
}
}
usable_s = ofputil_protocols_to_string(usable_protocols);
if (usable_protocols & allowed_protocols) {
ovs_fatal(0, "switch does not support any of the usable flow "
"formats (%s)", usable_s);
} else {
char *allowed_s = ofputil_protocols_to_string(allowed_protocols);
ovs_fatal(0, "none of the usable flow formats (%s) is among the "
"allowed flow formats (%s)", usable_s, allowed_s);
}
}
static struct vconn *
prepare_dump_flows(int argc, char *argv[], bool aggregate,
struct ofpbuf **requestp)
{
enum ofputil_protocol usable_protocols, protocol;
struct ofputil_flow_stats_request fsr;
struct vconn *vconn;
char *error;
error = parse_ofp_flow_stats_request_str(&fsr, aggregate,
argc > 2 ? argv[2] : "",
&usable_protocols);
if (error) {
ovs_fatal(0, "%s", error);
}
protocol = open_vconn(argv[1], &vconn);
protocol = set_protocol_for_flow_dump(vconn, protocol, usable_protocols);
*requestp = ofputil_encode_flow_stats_request(&fsr, protocol);
return vconn;
}
static void
ofctl_dump_flows__(int argc, char *argv[], bool aggregate)
{
struct ofpbuf *request;
struct vconn *vconn;
vconn = prepare_dump_flows(argc, argv, aggregate, &request);
dump_stats_transaction(vconn, request);
vconn_close(vconn);
}
static int
compare_flows(const void *afs_, const void *bfs_)
{
const struct ofputil_flow_stats *afs = afs_;
const struct ofputil_flow_stats *bfs = bfs_;
const struct match *a = &afs->match;
const struct match *b = &bfs->match;
const struct sort_criterion *sc;
for (sc = criteria; sc < &criteria[n_criteria]; sc++) {
const struct mf_field *f = sc->field;
int ret;
if (!f) {
unsigned int a_pri = afs->priority;
unsigned int b_pri = bfs->priority;
ret = a_pri < b_pri ? -1 : a_pri > b_pri;
} else {
bool ina, inb;
ina = mf_are_prereqs_ok(f, &a->flow) && !mf_is_all_wild(f, &a->wc);
inb = mf_are_prereqs_ok(f, &b->flow) && !mf_is_all_wild(f, &b->wc);
if (ina != inb) {
/* Skip the test for sc->order, so that missing fields always
* sort to the end whether we're sorting in ascending or
* descending order. */
return ina ? -1 : 1;
} else {
union mf_value aval, bval;
mf_get_value(f, &a->flow, &aval);
mf_get_value(f, &b->flow, &bval);
ret = memcmp(&aval, &bval, f->n_bytes);
}
}
if (ret) {
return sc->order == SORT_ASC ? ret : -ret;
}
}
return 0;
}
static void
ofctl_dump_flows(int argc, char *argv[])
{
if (!n_criteria) {
return ofctl_dump_flows__(argc, argv, false);
} else {
struct ofputil_flow_stats *fses;
size_t n_fses, allocated_fses;
struct ofpbuf *request;
struct ofpbuf ofpacts;
struct ofpbuf *reply;
struct vconn *vconn;
ovs_be32 send_xid;
struct ds s;
size_t i;
vconn = prepare_dump_flows(argc, argv, false, &request);
send_xid = ((struct ofp_header *) request->data)->xid;
send_openflow_buffer(vconn, request);
fses = NULL;
n_fses = allocated_fses = 0;
reply = NULL;
ofpbuf_init(&ofpacts, 0);
for (;;) {
struct ofputil_flow_stats *fs;
if (n_fses >= allocated_fses) {
fses = x2nrealloc(fses, &allocated_fses, sizeof *fses);
}
fs = &fses[n_fses];
if (!recv_flow_stats_reply(vconn, send_xid, &reply, fs,
&ofpacts)) {
break;
}
fs->ofpacts = xmemdup(fs->ofpacts, fs->ofpacts_len);
n_fses++;
}
ofpbuf_uninit(&ofpacts);