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ovs-ofctl.c
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ovs-ofctl.c
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/*
* Copyright (c) 2008-2017 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 <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 "colors.h"
#include "compiler.h"
#include "dirs.h"
#include "dp-packet.h"
#include "fatal-signal.h"
#include "nx-match.h"
#include "odp-util.h"
#include "ofp-version-opt.h"
#include "ofproto/ofproto.h"
#include "openflow/nicira-ext.h"
#include "openflow/openflow.h"
#include "openvswitch/dynamic-string.h"
#include "openvswitch/meta-flow.h"
#include "openvswitch/ofp-actions.h"
#include "openvswitch/ofp-errors.h"
#include "openvswitch/ofp-msgs.h"
#include "openvswitch/ofp-print.h"
#include "openvswitch/ofp-util.h"
#include "openvswitch/ofp-parse.h"
#include "openvswitch/ofpbuf.h"
#include "openvswitch/shash.h"
#include "openvswitch/vconn.h"
#include "openvswitch/vlog.h"
#include "packets.h"
#include "pcap-file.h"
#include "openvswitch/poll-loop.h"
#include "random.h"
#include "sort.h"
#include "stream-ssl.h"
#include "socket-util.h"
#include "timeval.h"
#include "unixctl.h"
#include "util.h"
VLOG_DEFINE_THIS_MODULE(ofctl);
/* --bundle: Use OpenFlow 1.3+ bundle for making the flow table change atomic.
* NOTE: If OpenFlow 1.3 or higher is not selected with the '-O' option,
* OpenFlow 1.4 will be implicitly selected. Also the flow mod will use
* OpenFlow 1.4, so the semantics may be different (see the comment in
* parse_options() for details).
*/
static bool bundle = false;
/* --color: Use color markers. */
static bool enable_color;
/* --read-only: Do not execute read only commands. */
static bool read_only;
/* --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;
/* --may-create: If true, the mod-group command creates a group that does not
* yet exist; otherwise, such a command has no effect. */
static bool may_create;
/* --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;
/* --unixctl-path: Path to use for unixctl server, for "monitor" and "snoop"
commands. */
static char *unixctl_path;
/* --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;
/* --names, --no-names: Show port names in output and accept port numbers in
* input. (When neither is specified, the default is to accept port numbers
* but, for backward compatibility, not to show them unless this is an
* interactive console session.) */
static int use_port_names = -1;
static const struct ofputil_port_map *ports_to_accept(const char *vconn_name);
static const struct ofputil_port_map *ports_to_show(const char *vconn_name);
static bool should_accept_ports(void);
static bool should_show_ports(void);
/* --stats, --no-stats: Show statistics in flow dumps? */
static int show_stats = 1;
/* --pcap: Makes "compose-packet" print a pcap on stdout. */
static int print_pcap = 0;
static const struct ovs_cmdl_command *get_all_commands(void);
OVS_NO_RETURN static void usage(void);
static void parse_options(int argc, char *argv[]);
int
main(int argc, char *argv[])
{
struct ovs_cmdl_context ctx = { .argc = 0, };
set_program_name(argv[0]);
service_start(&argc, &argv);
parse_options(argc, argv);
fatal_ignore_sigpipe();
ctx.argc = argc - optind;
ctx.argv = argv + optind;
daemon_become_new_user(false);
if (read_only) {
ovs_cmdl_run_command_read_only(&ctx, get_all_commands());
} else {
ovs_cmdl_run_command(&ctx, 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,
OPT_UNIXCTL,
OPT_BUNDLE,
OPT_COLOR,
OPT_MAY_CREATE,
OPT_READ_ONLY,
DAEMON_OPTION_ENUMS,
OFP_VERSION_OPTION_ENUMS,
VLOG_OPTION_ENUMS,
SSL_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},
{"names", no_argument, &use_port_names, 1},
{"no-names", no_argument, &use_port_names, 0},
{"stats", no_argument, &show_stats, 1},
{"no-stats", no_argument, &show_stats, 0},
{"unixctl", required_argument, NULL, OPT_UNIXCTL},
{"help", no_argument, NULL, 'h'},
{"option", no_argument, NULL, 'o'},
{"bundle", no_argument, NULL, OPT_BUNDLE},
{"color", optional_argument, NULL, OPT_COLOR},
{"may-create", no_argument, NULL, OPT_MAY_CREATE},
{"pcap", no_argument, &print_pcap, 1},
{"read-only", no_argument, NULL, OPT_READ_ONLY},
DAEMON_LONG_OPTIONS,
OFP_VERSION_LONG_OPTIONS,
VLOG_LONG_OPTIONS,
STREAM_SSL_LONG_OPTIONS,
{NULL, 0, NULL, 0},
};
char *short_options = ovs_cmdl_long_options_to_short_options(long_options);
uint32_t versions;
enum ofputil_protocol version_protocols;
/* For now, ovs-ofctl only enables OpenFlow 1.0 by default. This is
* because ovs-ofctl implements command such as "add-flow" as raw OpenFlow
* requests, but those requests have subtly different semantics in
* different OpenFlow versions. For example:
*
* - In OpenFlow 1.0, a "mod-flow" operation that does not find any
* existing flow to modify adds a new flow.
*
* - In OpenFlow 1.1, a "mod-flow" operation that does not find any
* existing flow to modify adds a new flow, but only if the mod-flow
* did not match on the flow cookie.
*
* - In OpenFlow 1.2 and a later, a "mod-flow" operation never adds a
* new flow.
*/
set_allowed_ofp_versions("OpenFlow10");
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 'o':
ovs_cmdl_print_options(long_options);
exit(EXIT_SUCCESS);
case OPT_BUNDLE:
bundle = true;
break;
case OPT_STRICT:
strict = true;
break;
case OPT_READ_ONLY:
read_only = 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;
case OPT_UNIXCTL:
unixctl_path = optarg;
break;
case OPT_COLOR:
if (optarg) {
if (!strcasecmp(optarg, "always")
|| !strcasecmp(optarg, "yes")
|| !strcasecmp(optarg, "force")) {
enable_color = true;
} else if (!strcasecmp(optarg, "never")
|| !strcasecmp(optarg, "no")
|| !strcasecmp(optarg, "none")) {
enable_color = false;
} else if (!strcasecmp(optarg, "auto")
|| !strcasecmp(optarg, "tty")
|| !strcasecmp(optarg, "if-tty")) {
/* Determine whether we need colors, i.e. whether standard
* output is a tty. */
enable_color = is_stdout_a_tty();
} else {
ovs_fatal(0, "incorrect value `%s' for --color", optarg);
}
} else {
enable_color = is_stdout_a_tty();
}
break;
case OPT_MAY_CREATE:
may_create = true;
break;
DAEMON_OPTION_HANDLERS
OFP_VERSION_OPTION_HANDLERS
VLOG_OPTION_HANDLERS
STREAM_SSL_OPTION_HANDLERS
case '?':
exit(EXIT_FAILURE);
case 0:
break;
default:
abort();
}
}
if (n_criteria) {
/* Always do a final sort pass based on priority. */
add_sort_criterion(SORT_DESC, "priority");
}
free(short_options);
/* Implicit OpenFlow 1.4 with the '--bundle' option. */
if (bundle && !(get_allowed_ofp_versions() &
ofputil_protocols_to_version_bitmap(OFPUTIL_P_OF13_UP))) {
/* Add implicit allowance for OpenFlow 1.4. */
add_allowed_ofp_versions(ofputil_protocols_to_version_bitmap(
OFPUTIL_P_OF14_OXM));
/* Remove all versions that do not support bundles. */
mask_allowed_ofp_versions(ofputil_protocols_to_version_bitmap(
OFPUTIL_P_OF13_UP));
}
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));
colors_init(enable_color);
}
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"
" dump-table-features SWITCH print table features\n"
" dump-table-desc SWITCH print table description (OF1.4+)\n"
" mod-port SWITCH IFACE ACT modify port behavior\n"
" mod-table SWITCH MOD modify flow table behavior\n"
" OF1.1/1.2 MOD: controller, continue, drop\n"
" OF1.4+ MOD: evict, noevict, vacancy:low,high, novacancy\n"
" get-frags SWITCH print fragment handling behavior\n"
" set-frags SWITCH FRAG_MODE set fragment handling behavior\n"
" FRAG_MODE: normal, drop, reassemble, nx-match\n"
" dump-ports SWITCH [PORT] print port statistics\n"
" dump-ports-desc SWITCH [PORT] 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-groups SWITCH FILE add group from FILE\n"
" [--may-create] mod-group SWITCH GROUP modify specific group\n"
" del-groups SWITCH [GROUP] delete matching GROUPs\n"
" insert-buckets SWITCH [GROUP] add buckets to GROUP\n"
" remove-buckets SWITCH [GROUP] remove buckets from GROUP\n"
" dump-group-features SWITCH print group features\n"
" dump-groups SWITCH [GROUP] print group description\n"
" dump-group-stats SWITCH [GROUP] print group statistics\n"
" queue-get-config SWITCH [PORT] print queue config 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"
" add-tlv-map SWITCH MAP add TLV option MAPpings\n"
" del-tlv-map SWITCH [MAP] delete TLV option MAPpings\n"
" dump-tlv-map SWITCH print TLV option mappings\n"
" dump-ipfix-bridge SWITCH print ipfix stats of bridge\n"
" dump-ipfix-flow SWITCH print flow ipfix of a bridge\n"
" ct-flush-zone SWITCH ZONE flush conntrack entries in ZONE\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"
" --read-only do not execute read/write 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"
" --names show port names instead of numbers\n"
" --unixctl=SOCKET set control socket name\n"
" --color[=always|never|auto] control use of color in output\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, ...)
OVS_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)
{
run(vconn_send_block(vconn, buffer), "failed to send packet to switch");
}
static void
dump_transaction(struct vconn *vconn, struct ofpbuf *request)
{
const struct ofp_header *oh = request->data;
if (ofpmsg_is_stat_request(oh)) {
ovs_be32 send_xid = 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, 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,
ports_to_show(vconn_get_name(vconn)), 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,
ports_to_show(vconn_get_name(vconn)),
verbosity + 1));
}
} else {
VLOG_DBG("received reply with xid %08"PRIx32" "
"!= expected %08"PRIx32, recv_xid, send_xid);
}
ofpbuf_delete(reply);
}
} else {
struct ofpbuf *reply;
run(vconn_transact(vconn, request, &reply), "talking to %s",
vconn_get_name(vconn));
ofp_print(stdout, reply->data, reply->size,
ports_to_show(vconn_get_name(vconn)), 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);
}
/* 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 ovs_list *requests)
{
struct ofpbuf *reply;
run(vconn_transact_multiple_noreply(vconn, requests, &reply),
"talking to %s", vconn_get_name(vconn));
if (reply) {
ofp_print(stderr, reply->data, reply->size,
ports_to_show(vconn_get_name(vconn)), verbosity + 2);
exit(1);
}
ofpbuf_delete(reply);
}
/* Frees the error messages as they are printed. */
static void
bundle_print_errors(struct ovs_list *errors, struct ovs_list *requests,
const char *vconn_name)
{
struct ofpbuf *error, *next;
struct ofpbuf *bmsg;
INIT_CONTAINER(bmsg, requests, list_node);
LIST_FOR_EACH_SAFE (error, next, list_node, errors) {
const struct ofp_header *error_oh = error->data;
ovs_be32 error_xid = error_oh->xid;
enum ofperr ofperr;
struct ofpbuf payload;
ofperr = ofperr_decode_msg(error_oh, &payload);
if (!ofperr) {
fprintf(stderr, "***decode error***");
} else {
/* Default to the likely truncated message. */
const struct ofp_header *ofp_msg = payload.data;
size_t msg_len = payload.size;
/* Find the failing message from the requests list to be able to
* dump the whole message. We assume the errors are returned in
* the same order as in which the messages are sent to get O(n)
* rather than O(n^2) processing here. If this heuristics fails we
* may print the truncated hexdumps instead. */
LIST_FOR_EACH_CONTINUE (bmsg, list_node, requests) {
const struct ofp_header *oh = bmsg->data;
if (oh->xid == error_xid) {
ofp_msg = oh;
msg_len = bmsg->size;
break;
}
}
fprintf(stderr, "Error %s for: ", ofperr_get_name(ofperr));
ofp_print(stderr, ofp_msg, msg_len, ports_to_show(vconn_name),
verbosity + 1);
}
ofpbuf_uninit(&payload);
ofpbuf_delete(error);
}
fflush(stderr);
}
static void
bundle_transact(struct vconn *vconn, struct ovs_list *requests, uint16_t flags)
{
struct ovs_list errors;
int retval = vconn_bundle_transact(vconn, requests, flags, &errors);
bundle_print_errors(&errors, requests, vconn_get_name(vconn));
if (retval) {
ovs_fatal(retval, "talking to %s", vconn_get_name(vconn));
}
}
/* 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 ovs_list requests;
ovs_list_init(&requests);
ovs_list_push_back(&requests, &request->list_node);
transact_multiple_noreply(vconn, &requests);
}
static void
fetch_switch_config(struct vconn *vconn, struct ofputil_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_decode(&type, reply->data)
|| type != OFPTYPE_GET_CONFIG_REPLY) {
ovs_fatal(0, "%s: bad reply to config request", vconn_get_name(vconn));
}
ofputil_decode_get_config_reply(reply->data, config);
ofpbuf_delete(reply);
}
static void
set_switch_config(struct vconn *vconn,
const struct ofputil_switch_config *config)
{
enum ofp_version version = vconn_get_version(vconn);
transact_noreply(vconn, ofputil_encode_set_config(config, version));
}
static void
ofctl_show(struct ovs_cmdl_context *ctx)
{
const char *vconn_name = ctx->argv[1];
enum ofp_version version;
struct vconn *vconn;
struct ofpbuf *request;
struct ofpbuf *reply;
bool has_ports;
open_vconn(vconn_name, &vconn);
version = vconn_get_version(vconn);
request = ofpraw_alloc(OFPRAW_OFPT_FEATURES_REQUEST, version, 0);
run(vconn_transact(vconn, request, &reply), "talking to %s", vconn_name);
has_ports = ofputil_switch_features_has_ports(reply);
ofp_print(stdout, reply->data, reply->size, NULL, verbosity + 1);
ofpbuf_delete(reply);
if (!has_ports) {
request = ofputil_encode_port_desc_stats_request(version, OFPP_ANY);
dump_transaction(vconn, request);
}
dump_trivial_transaction(vconn_name, OFPRAW_OFPT_GET_CONFIG_REQUEST);
vconn_close(vconn);
}
static void
ofctl_dump_desc(struct ovs_cmdl_context *ctx)
{
dump_trivial_transaction(ctx->argv[1], OFPRAW_OFPST_DESC_REQUEST);
}
static void
ofctl_dump_tables(struct ovs_cmdl_context *ctx)
{
dump_trivial_transaction(ctx->argv[1], OFPRAW_OFPST_TABLE_REQUEST);
}
static void
ofctl_dump_table_features(struct ovs_cmdl_context *ctx)
{
struct ofpbuf *request;
struct vconn *vconn;
open_vconn(ctx->argv[1], &vconn);
request = ofputil_encode_table_features_request(vconn_get_version(vconn));
/* The following is similar to dump_trivial_transaction(), but it
* maintains the previous 'ofputil_table_features' from one stats reply
* message to the next, which allows duplication to be eliminated in the
* output across messages. Otherwise the output is much larger and harder
* to read, because only 17 or so ofputil_table_features elements fit in a
* single 64 kB OpenFlow message and therefore you get a ton of repetition
* (every 17th element is printed in full instead of abbreviated). */
const struct ofp_header *request_oh = request->data;
ovs_be32 send_xid = request_oh->xid;
bool done = false;
struct ofputil_table_features prev;
int n = 0;
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 ofptype type;
enum ofperr error;
error = ofptype_decode(&type, reply->data);
if (error) {
ovs_fatal(0, "decode error: %s", ofperr_get_name(error));
} else if (type == OFPTYPE_ERROR) {
ofp_print(stdout, reply->data, reply->size, NULL,
verbosity + 1);
done = true;
} else if (type == OFPTYPE_TABLE_FEATURES_STATS_REPLY) {
done = !ofpmp_more(reply->data);
for (;;) {
struct ofputil_table_features tf;
int retval;
retval = ofputil_decode_table_features(reply, &tf, true);
if (retval) {
if (retval != EOF) {
ovs_fatal(0, "decode error: %s",
ofperr_get_name(retval));
}
break;
}
struct ds s = DS_EMPTY_INITIALIZER;
ofp_print_table_features(&s, &tf, n ? &prev : NULL,
NULL, NULL);
puts(ds_cstr(&s));
ds_destroy(&s);
prev = tf;
n++;
}
} else {
ovs_fatal(0, "received bad reply: %s",
ofp_to_string(reply->data, reply->size,
ports_to_show(ctx->argv[1]),
verbosity + 1));
}
} else {
VLOG_DBG("received reply with xid %08"PRIx32" "
"!= expected %08"PRIx32, recv_xid, send_xid);
}
ofpbuf_delete(reply);
}
vconn_close(vconn);
}
static void
ofctl_dump_table_desc(struct ovs_cmdl_context *ctx)
{
struct ofpbuf *request;
struct vconn *vconn;
open_vconn(ctx->argv[1], &vconn);
request = ofputil_encode_table_desc_request(vconn_get_version(vconn));
if (request) {
dump_transaction(vconn, request);
}
vconn_close(vconn);
}
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;
}
struct port_iterator {
struct vconn *vconn;
enum { PI_FEATURES, PI_PORT_DESC } variant;
struct ofpbuf *reply;
ovs_be32 send_xid;
bool more;
};
static void
port_iterator_fetch_port_desc(struct port_iterator *pi)
{
pi->variant = PI_PORT_DESC;
pi->more = true;
struct ofpbuf *rq = ofputil_encode_port_desc_stats_request(
vconn_get_version(pi->vconn), OFPP_ANY);
pi->send_xid = ((struct ofp_header *) rq->data)->xid;
send_openflow_buffer(pi->vconn, rq);
}
static void
port_iterator_fetch_features(struct port_iterator *pi)
{
pi->variant = PI_FEATURES;
/* Fetch the switch's ofp_switch_features. */
enum ofp_version version = vconn_get_version(pi->vconn);
struct ofpbuf *rq = ofpraw_alloc(OFPRAW_OFPT_FEATURES_REQUEST, version, 0);
run(vconn_transact(pi->vconn, rq, &pi->reply),
"talking to %s", vconn_get_name(pi->vconn));
enum ofptype type;
if (ofptype_decode(&type, pi->reply->data)
|| type != OFPTYPE_FEATURES_REPLY) {
ovs_fatal(0, "%s: received bad features reply",
vconn_get_name(pi->vconn));
}
if (!ofputil_switch_features_has_ports(pi->reply)) {
/* The switch features reply does not contain a complete list of ports.
* Probably, there are more ports than will fit into a single 64 kB
* OpenFlow message. Use OFPST_PORT_DESC to get a complete list of
* ports. */
ofpbuf_delete(pi->reply);