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/*
* Copyright (c) 2015 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 <stdlib.h>
#include <linux/netfilter/nfnetlink.h>
#include "ct-dpif.h"
#include "netlink-conntrack.h"
#include "netlink-notifier.h"
#include "ovstest.h"
#include "openvswitch/poll-loop.h"
/* Monitor command */
struct test_change {
enum nl_ct_event_type type;
struct ct_dpif_entry entry;
};
static int
event_parse(struct ofpbuf *buf, void *change_)
{
struct test_change *change = change_;
if (nl_ct_parse_entry(buf, &change->entry, &change->type)) {
switch (change->type) {
case NL_CT_EVENT_NEW:
return NFNLGRP_CONNTRACK_NEW;
case NL_CT_EVENT_UPDATE:
return NFNLGRP_CONNTRACK_UPDATE;
case NL_CT_EVENT_DELETE:
return NFNLGRP_CONNTRACK_DESTROY;
}
}
return 0;
}
static void
event_print(const void *change_, void *aux OVS_UNUSED)
{
const struct test_change *change = change_;
if (change) {
struct ds ds = DS_EMPTY_INITIALIZER;
nl_ct_format_event_entry(&change->entry, change->type, &ds, true,
true);
printf("%s\n", ds_cstr(&ds));
ds_destroy(&ds);
}
}
static void
test_nl_ct_monitor(struct ovs_cmdl_context *ctx OVS_UNUSED)
{
int groups [] = {
NFNLGRP_CONNTRACK_DESTROY,
NFNLGRP_CONNTRACK_NEW,
NFNLGRP_CONNTRACK_UPDATE,
};
struct nln *nln;
struct nln_notifier *notifiers[ARRAY_SIZE(groups)];
struct test_change change;
unsigned i;
nln = nln_create(NETLINK_NETFILTER, event_parse, &change);
for (i = 0; i < ARRAY_SIZE(groups); i++) {
notifiers[i] = nln_notifier_create(nln, groups[i], event_print, NULL);
}
for (;;) {
nln_run(nln);
nln_wait(nln);
poll_block();
}
for (i = 0; i < ARRAY_SIZE(groups); i++) {
nln_notifier_destroy(notifiers[i]);
}
nln_destroy(nln);
}
/* Dump command */
static void
test_nl_ct_dump(struct ovs_cmdl_context *ctx)
{
struct nl_ct_dump_state *dump;
uint16_t zone, *pzone = NULL;
struct ct_dpif_entry entry;
int err;
int tot_bkts;
if (ctx->argc >= 2) {
if (!ovs_scan(ctx->argv[1], "zone=%"SCNu16, &zone)) {
ovs_fatal(0, "Error parsing zone= specifier");
}
pzone = &zone;
}
err = nl_ct_dump_start(&dump, pzone, &tot_bkts);
if (err) {
ovs_fatal(err, "Error creating conntrack netlink dump");
}
do {
err = nl_ct_dump_next(dump, &entry);
if (!err) {
struct ds ds = DS_EMPTY_INITIALIZER;
ct_dpif_format_entry(&entry, &ds, true, true);
printf("%s\n", ds_cstr(&ds));
ds_destroy(&ds);
}
} while (!err);
if (err != EOF) {
ovs_fatal(err, "Error dumping conntrack netlink entry");
}
nl_ct_dump_done(dump);
}
/* Flush command */
static void
test_nl_ct_flush(struct ovs_cmdl_context *ctx OVS_UNUSED)
{
int err;
if (ctx->argc >= 2) {
uint16_t zone;
if (ovs_scan(ctx->argv[1], "zone=%"SCNu16, &zone)) {
err = nl_ct_flush_zone(zone);
} else {
ovs_fatal(0, "Error parsing zone= specifier");
}
} else {
err = nl_ct_flush();
}
if (err) {
ovs_fatal(err, "Error flushing conntrack netlink");
}
}
static const struct ovs_cmdl_command commands[] = {
/* Linux netlink connection tracker interface test. */
/* Prints all the entries in the connection table and exits. */
{"dump", "[zone=zone]", 0, 1, test_nl_ct_dump, OVS_RO},
/* Listens to all the connection tracking events and prints them to
* standard output until killed. */
{"monitor", "", 0, 0, test_nl_ct_monitor, OVS_RO},
/* Flushes all the entries from all the tables.. */
{"flush", "[zone=zone]", 0, 1, test_nl_ct_flush, OVS_RO},
{NULL, NULL, 0, 0, NULL, OVS_RO},
};
static void
test_netlink_conntrack(int argc, char *argv[])
{
struct ovs_cmdl_context ctx = {
.argc = argc - 1,
.argv = argv + 1,
};
set_program_name(argv[0]);
ovs_cmdl_run_command(&ctx, commands);
}
OVSTEST_REGISTER("test-netlink-conntrack", test_netlink_conntrack);
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