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/*
* Copyright (c) 2024 Canonical Ltd.
*
* 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>
#undef NDEBUG
#include <linux/rtnetlink.h>
#include <stdio.h>
#include <stdlib.h>
#include "netlink-notifier.h"
#include "ovstest.h"
#include "packets.h"
#include "route-table.h"
static char *
rt_prot_name(unsigned char p)
{
/* We concentrate on the most used protocols, as they are the ones most
* likely to be defined in the build environment. */
return p == RTPROT_UNSPEC ? "RTPROT_UNSPEC" :
p == RTPROT_REDIRECT ? "RTPROT_REDIRECT" :
p == RTPROT_KERNEL ? "RTPROT_KERNEL" :
p == RTPROT_BOOT ? "RTPROT_BOOT" :
p == RTPROT_STATIC ? "RTPROT_STATIC" :
p == RTPROT_RA ? "RTPROT_RA" :
p == RTPROT_DHCP ? "RTPROT_DHCP" :
p == RTPROT_BGP ? "RTPROT_BGP" :
"UNKNOWN";
}
static char *
rt_table_name(uint32_t id)
{
static char tid[11] = "";
snprintf(tid, sizeof tid, "%"PRIu32, id);
return id == RT_TABLE_UNSPEC ? "RT_TABLE_UNSPEC" :
id == RT_TABLE_COMPAT ? "RT_TABLE_COMPAT" :
id == RT_TABLE_DEFAULT ? "RT_TABLE_DEFAULT" :
id == RT_TABLE_MAIN ? "RT_TABLE_MAIN" :
id == RT_TABLE_LOCAL ? "RT_TABLE_LOCAL" :
tid;
}
static void
test_lib_route_table_handle_msg(const struct route_table_msg *change,
void *data OVS_UNUSED)
{
struct ds nexthop_addr = DS_EMPTY_INITIALIZER;
struct ds rta_prefsrc = DS_EMPTY_INITIALIZER;
const struct route_data *rd = &change->rd;
struct ds rta_dst = DS_EMPTY_INITIALIZER;
const struct route_data_nexthop *rdnh;
ipv6_format_mapped(&change->rd.rta_prefsrc, &rta_prefsrc);
ipv6_format_mapped(&change->rd.rta_dst, &rta_dst);
printf("%s/%u relevant: %d nlmsg_type: %d rtm_protocol: %s (%u) "
"rtn_local: %d rta_prefsrc: %s rta_mark: %"PRIu32" "
"rta_table_id: %s rta_priority: %"PRIu32"\n",
ds_cstr(&rta_dst), rd->rtm_dst_len, change->relevant,
change->nlmsg_type, rt_prot_name(rd->rtm_protocol),
rd->rtm_protocol, rd->rtn_local, ds_cstr(&rta_prefsrc),
rd->rta_mark, rt_table_name(rd->rta_table_id), rd->rta_priority);
LIST_FOR_EACH (rdnh, nexthop_node, &rd->nexthops) {
ds_clear(&nexthop_addr);
ipv6_format_mapped(&rdnh->addr, &nexthop_addr);
printf(" %s/%u nexthop family: %s addr: %s ifname: %s\n",
ds_cstr(&rta_dst), rd->rtm_dst_len,
rdnh->family == AF_INET ? "AF_INET" :
rdnh->family == AF_INET6 ? "AF_INET6" :
"UNKNOWN",
ds_cstr(&nexthop_addr),
rdnh->ifname);
}
ds_destroy(&nexthop_addr);
ds_destroy(&rta_prefsrc);
ds_destroy(&rta_dst);
}
static void
test_lib_route_table_dump(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
{
route_table_dump_one_table(RT_TABLE_UNSPEC,
test_lib_route_table_handle_msg,
NULL);
}
static void
test_lib_route_table_change(struct route_table_msg *change,
void *aux OVS_UNUSED)
{
test_lib_route_table_handle_msg(change, NULL);
route_data_destroy(&change->rd);
}
static void
test_lib_route_table_monitor(int argc, char *argv[])
{
static struct nln_notifier *route6_notifier OVS_UNUSED;
static struct nln_notifier *route_notifier OVS_UNUSED;
static struct route_table_msg rtmsg;
static struct nln *nln OVS_UNUSED;
const char *cmd = argv[1];
if (argc != 2) {
printf("usage: ovstest %s 'ip route add ...'\n", argv[0]);
exit(EXIT_FAILURE);
}
nln = nln_create(NETLINK_ROUTE, route_table_parse, &rtmsg);
route_notifier =
nln_notifier_create(nln, RTNLGRP_IPV4_ROUTE,
(nln_notify_func *) test_lib_route_table_change,
NULL);
route6_notifier =
nln_notifier_create(nln, RTNLGRP_IPV6_ROUTE,
(nln_notify_func *) test_lib_route_table_change,
NULL);
nln_run(nln);
nln_wait(nln);
int rc = system(cmd);
if (rc) {
exit(rc);
}
nln_run(nln);
}
OVSTEST_REGISTER("test-lib-route-table-monitor", test_lib_route_table_monitor);
OVSTEST_REGISTER("test-lib-route-table-dump", test_lib_route_table_dump);
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