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selftests/net: Add a test for TCP-AO keys matching

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Add TCP-AO tests on connect()/accept() pair.
SNMP counters exposed by kernel are very useful here to verify the
expected behavior of TCP-AO.

Expected output for ipv4 version:
> # ./connect-deny_ipv4
> 1..19
> # 1702[lib/setup.c:254] rand seed 1680553689
> TAP version 13
> ok 1 Non-AO server + AO client
> ok 2 Non-AO server + AO client: counter TCPAOKeyNotFound increased 0 => 1
> ok 3 AO server + Non-AO client
> ok 4 AO server + Non-AO client: counter TCPAORequired increased 0 => 1
> ok 5 Wrong password
> ok 6 Wrong password: counter TCPAOBad increased 0 => 1
> ok 7 Wrong rcv id
> ok 8 Wrong rcv id: counter TCPAOKeyNotFound increased 1 => 2
> ok 9 Wrong snd id
> ok 10 Wrong snd id: counter TCPAOGood increased 0 => 1
> ok 11 Server: Wrong addr: counter TCPAOKeyNotFound increased 2 => 3
> ok 12 Server: Wrong addr
> ok 13 Client: Wrong addr: connect() was prevented
> ok 14 rcv id != snd id: connected
> ok 15 rcv id != snd id: counter TCPAOGood increased 1 => 3
> ok 16 Server: prefix match: connected
> ok 17 Server: prefix match: counter TCPAOGood increased 4 => 6
> ok 18 Client: prefix match: connected
> ok 19 Client: prefix match: counter TCPAOGood increased 7 => 9
> # Totals: pass:19 fail:0 xfail:0 xpass:0 skip:0 error:0

Expected output for ipv6 version:
> # ./connect-deny_ipv6
> 1..19
> # 1725[lib/setup.c:254] rand seed 1680553711
> TAP version 13
> ok 1 Non-AO server + AO client
> ok 2 Non-AO server + AO client: counter TCPAOKeyNotFound increased 0 => 1
> ok 3 AO server + Non-AO client: counter TCPAORequired increased 0 => 1
> ok 4 AO server + Non-AO client
> ok 5 Wrong password: counter TCPAOBad increased 0 => 1
> ok 6 Wrong password
> ok 7 Wrong rcv id: counter TCPAOKeyNotFound increased 1 => 2
> ok 8 Wrong rcv id
> ok 9 Wrong snd id: counter TCPAOGood increased 0 => 1
> ok 10 Wrong snd id
> ok 11 Server: Wrong addr
> ok 12 Server: Wrong addr: counter TCPAOKeyNotFound increased 2 => 3
> ok 13 Client: Wrong addr: connect() was prevented
> ok 14 rcv id != snd id: connected
> ok 15 rcv id != snd id: counter TCPAOGood increased 1 => 3
> ok 16 Server: prefix match: connected
> ok 17 Server: prefix match: counter TCPAOGood increased 5 => 7
> ok 18 Client: prefix match: connected
> ok 19 Client: prefix match: counter TCPAOGood increased 8 => 10
> # Totals: pass:19 fail:0 xfail:0 xpass:0 skip:0 error:0

Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dmitry Safonov 2023-12-15 02:36:18 +00:00 committed by David S. Miller
parent d11301f659
commit ed9d09b309
2 changed files with 265 additions and 0 deletions
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1
tools/testing/selftests/net/tcp_ao/Makefile
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@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
TEST_BOTH_AF := connect
TEST_BOTH_AF += connect-deny
TEST_BOTH_AF += icmps-accept icmps-discard
TEST_IPV4_PROGS := $(TEST_BOTH_AF:%=%_ipv4)

264
tools/testing/selftests/net/tcp_ao/connect-deny.c Normal file
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@ -0,0 +1,264 @@
// SPDX-License-Identifier: GPL-2.0
/* Author: Dmitry Safonov <dima@arista.com> */
#include <inttypes.h>
#include "aolib.h"
#define fault(type) (inj == FAULT_ ## type)
static inline int test_add_key_maclen(int sk, const char *key, uint8_t maclen,
union tcp_addr in_addr, uint8_t prefix,
uint8_t sndid, uint8_t rcvid)
{
struct tcp_ao_add tmp = {};
int err;
if (prefix > DEFAULT_TEST_PREFIX)
prefix = DEFAULT_TEST_PREFIX;
err = test_prepare_key(&tmp, DEFAULT_TEST_ALGO, in_addr, false, false,
prefix, 0, sndid, rcvid, maclen,
0, strlen(key), key);
if (err)
return err;
err = setsockopt(sk, IPPROTO_TCP, TCP_AO_ADD_KEY, &tmp, sizeof(tmp));
if (err < 0)
return -errno;
return test_verify_socket_key(sk, &tmp);
}
static void try_accept(const char *tst_name, unsigned int port, const char *pwd,
union tcp_addr addr, uint8_t prefix,
uint8_t sndid, uint8_t rcvid, uint8_t maclen,
const char *cnt_name, test_cnt cnt_expected,
fault_t inj)
{
struct tcp_ao_counters ao_cnt1, ao_cnt2;
uint64_t before_cnt = 0, after_cnt = 0; /* silence GCC */
int lsk, err, sk = 0;
time_t timeout;
lsk = test_listen_socket(this_ip_addr, port, 1);
if (pwd && test_add_key_maclen(lsk, pwd, maclen, addr, prefix, sndid, rcvid))
test_error("setsockopt(TCP_AO_ADD_KEY)");
if (cnt_name)
before_cnt = netstat_get_one(cnt_name, NULL);
if (pwd && test_get_tcp_ao_counters(lsk, &ao_cnt1))
test_error("test_get_tcp_ao_counters()");
synchronize_threads(); /* preparations done */
timeout = fault(TIMEOUT) ? TEST_RETRANSMIT_SEC : TEST_TIMEOUT_SEC;
err = test_wait_fd(lsk, timeout, 0);
if (err == -ETIMEDOUT) {
if (!fault(TIMEOUT))
test_fail("timeouted for accept()");
} else if (err < 0) {
test_error("test_wait_fd()");
} else {
if (fault(TIMEOUT))
test_fail("ready to accept");
sk = accept(lsk, NULL, NULL);
if (sk < 0) {
test_error("accept()");
} else {
if (fault(TIMEOUT))
test_fail("%s: accepted", tst_name);
}
}
if (pwd && test_get_tcp_ao_counters(lsk, &ao_cnt2))
test_error("test_get_tcp_ao_counters()");
close(lsk);
if (pwd)
test_tcp_ao_counters_cmp(tst_name, &ao_cnt1, &ao_cnt2, cnt_expected);
if (!cnt_name)
goto out;
after_cnt = netstat_get_one(cnt_name, NULL);
if (after_cnt <= before_cnt) {
test_fail("%s: %s counter did not increase: %zu <= %zu",
tst_name, cnt_name, after_cnt, before_cnt);
} else {
test_ok("%s: counter %s increased %zu => %zu",
tst_name, cnt_name, before_cnt, after_cnt);
}
out:
synchronize_threads(); /* close() */
if (sk > 0)
close(sk);
}
static void *server_fn(void *arg)
{
union tcp_addr wrong_addr, network_addr;
unsigned int port = test_server_port;
if (inet_pton(TEST_FAMILY, TEST_WRONG_IP, &wrong_addr) != 1)
test_error("Can't convert ip address %s", TEST_WRONG_IP);
try_accept("Non-AO server + AO client", port++, NULL,
this_ip_dest, -1, 100, 100, 0,
"TCPAOKeyNotFound", 0, FAULT_TIMEOUT);
try_accept("AO server + Non-AO client", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 100, 100, 0,
"TCPAORequired", TEST_CNT_AO_REQUIRED, FAULT_TIMEOUT);
try_accept("Wrong password", port++, "something that is not DEFAULT_TEST_PASSWORD",
this_ip_dest, -1, 100, 100, 0,
"TCPAOBad", TEST_CNT_BAD, FAULT_TIMEOUT);
try_accept("Wrong rcv id", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 100, 101, 0,
"TCPAOKeyNotFound", TEST_CNT_AO_KEY_NOT_FOUND, FAULT_TIMEOUT);
try_accept("Wrong snd id", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 101, 100, 0,
"TCPAOGood", TEST_CNT_GOOD, FAULT_TIMEOUT);
try_accept("Different maclen", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 100, 100, 8,
"TCPAOBad", TEST_CNT_BAD, FAULT_TIMEOUT);
try_accept("Server: Wrong addr", port++, DEFAULT_TEST_PASSWORD,
wrong_addr, -1, 100, 100, 0,
"TCPAOKeyNotFound", TEST_CNT_AO_KEY_NOT_FOUND, FAULT_TIMEOUT);
try_accept("Client: Wrong addr", port++, NULL,
this_ip_dest, -1, 100, 100, 0, NULL, 0, FAULT_TIMEOUT);
try_accept("rcv id != snd id", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 200, 100, 0,
"TCPAOGood", TEST_CNT_GOOD, 0);
if (inet_pton(TEST_FAMILY, TEST_NETWORK, &network_addr) != 1)
test_error("Can't convert ip address %s", TEST_NETWORK);
try_accept("Server: prefix match", port++, DEFAULT_TEST_PASSWORD,
network_addr, 16, 100, 100, 0,
"TCPAOGood", TEST_CNT_GOOD, 0);
try_accept("Client: prefix match", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 100, 100, 0,
"TCPAOGood", TEST_CNT_GOOD, 0);
/* client exits */
synchronize_threads();
return NULL;
}
static void try_connect(const char *tst_name, unsigned int port,
const char *pwd, union tcp_addr addr, uint8_t prefix,
uint8_t sndid, uint8_t rcvid,
test_cnt cnt_expected, fault_t inj)
{
struct tcp_ao_counters ao_cnt1, ao_cnt2;
time_t timeout;
int sk, ret;
sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP);
if (sk < 0)
test_error("socket()");
if (pwd && test_add_key(sk, pwd, addr, prefix, sndid, rcvid))
test_error("setsockopt(TCP_AO_ADD_KEY)");
if (pwd && test_get_tcp_ao_counters(sk, &ao_cnt1))
test_error("test_get_tcp_ao_counters()");
synchronize_threads(); /* preparations done */
timeout = fault(TIMEOUT) ? TEST_RETRANSMIT_SEC : TEST_TIMEOUT_SEC;
ret = _test_connect_socket(sk, this_ip_dest, port, timeout);
if (ret < 0) {
if (fault(KEYREJECT) && ret == -EKEYREJECTED) {
test_ok("%s: connect() was prevented", tst_name);
} else if (ret == -ETIMEDOUT && fault(TIMEOUT)) {
test_ok("%s", tst_name);
} else if (ret == -ECONNREFUSED &&
(fault(TIMEOUT) || fault(KEYREJECT))) {
test_ok("%s: refused to connect", tst_name);
} else {
test_error("%s: connect() returned %d", tst_name, ret);
}
goto out;
}
if (fault(TIMEOUT) || fault(KEYREJECT))
test_fail("%s: connected", tst_name);
else
test_ok("%s: connected", tst_name);
if (pwd && ret > 0) {
if (test_get_tcp_ao_counters(sk, &ao_cnt2))
test_error("test_get_tcp_ao_counters()");
test_tcp_ao_counters_cmp(tst_name, &ao_cnt1, &ao_cnt2, cnt_expected);
}
out:
synchronize_threads(); /* close() */
if (ret > 0)
close(sk);
}
static void *client_fn(void *arg)
{
union tcp_addr wrong_addr, network_addr;
unsigned int port = test_server_port;
if (inet_pton(TEST_FAMILY, TEST_WRONG_IP, &wrong_addr) != 1)
test_error("Can't convert ip address %s", TEST_WRONG_IP);
try_connect("Non-AO server + AO client", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 100, 100, 0, FAULT_TIMEOUT);
try_connect("AO server + Non-AO client", port++, NULL,
this_ip_dest, -1, 100, 100, 0, FAULT_TIMEOUT);
try_connect("Wrong password", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 100, 100, 0, FAULT_TIMEOUT);
try_connect("Wrong rcv id", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 100, 100, 0, FAULT_TIMEOUT);
try_connect("Wrong snd id", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 100, 100, 0, FAULT_TIMEOUT);
try_connect("Different maclen", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 100, 100, 0, FAULT_TIMEOUT);
try_connect("Server: Wrong addr", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 100, 100, 0, FAULT_TIMEOUT);
try_connect("Client: Wrong addr", port++, DEFAULT_TEST_PASSWORD,
wrong_addr, -1, 100, 100, 0, FAULT_KEYREJECT);
try_connect("rcv id != snd id", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 100, 200, TEST_CNT_GOOD, 0);
if (inet_pton(TEST_FAMILY, TEST_NETWORK, &network_addr) != 1)
test_error("Can't convert ip address %s", TEST_NETWORK);
try_connect("Server: prefix match", port++, DEFAULT_TEST_PASSWORD,
this_ip_dest, -1, 100, 100, TEST_CNT_GOOD, 0);
try_connect("Client: prefix match", port++, DEFAULT_TEST_PASSWORD,
network_addr, 16, 100, 100, TEST_CNT_GOOD, 0);
return NULL;
}
int main(int argc, char *argv[])
{
test_init(21, server_fn, client_fn);
return 0;
}