// SPDX-License-Identifier: GPL-2.0
/* Author: Dmitry Safonov <dima@arista.com> */
/* This is over-simplified TCP_REPAIR for TCP_ESTABLISHED sockets
* It tests that TCP - AO enabled connection can be restored .
* For the proper socket repair see :
* https : //github.com/checkpoint-restore/criu/blob/criu-dev/soccr/soccr.h
*/
#include <inttypes.h>
#include "aolib.h"
const size_t nr_packets = 20 ;
const size_t msg_len = 100 ;
const size_t quota = nr_packets * msg_len;
#define fault(type) (inj == FAULT_ ## type)
static void try_server_run(const char *tst_name, unsigned int port,
fault_t inj, test_cnt cnt_expected)
{
test_cnt poll_cnt = (cnt_expected == TEST_CNT_GOOD) ? 0 : cnt_expected;
const char *cnt_name = "TCPAOGood" ;
struct tcp_counters cnt1, cnt2;
uint64_t before_cnt, after_cnt;
int sk, lsk, dummy;
ssize_t bytes;
if (fault(TIMEOUT))
cnt_name = "TCPAOBad" ;
lsk = test_listen_socket(this_ip_addr, port, 1 );
if (test_add_key(lsk, DEFAULT_TEST_PASSWORD, this_ip_dest, -1 , 100 , 100 ))
test_error("setsockopt(TCP_AO_ADD_KEY)" );
synchronize_threads(); /* 1: MKT added => connect() */
if (test_wait_fd(lsk, TEST_TIMEOUT_SEC, 0 ))
test_error("test_wait_fd()" );
sk = accept(lsk, NULL, NULL);
if (sk < 0 )
test_error("accept()" );
synchronize_threads(); /* 2: accepted => send data */
close(lsk);
bytes = test_server_run(sk, quota, TEST_TIMEOUT_SEC);
if (bytes != quota) {
test_fail("%s: server served: %zd" , tst_name, bytes);
goto out;
}
before_cnt = netstat_get_one(cnt_name, NULL);
if (test_get_tcp_counters(sk, &cnt1))
test_error("test_get_tcp_counters()" );
bytes = test_skpair_server(sk, quota, poll_cnt, &dummy);
if (fault(TIMEOUT)) {
if (bytes > 0 )
test_fail("%s: server served: %zd" , tst_name, bytes);
else
test_ok("%s: server couldn't serve" , tst_name);
} else {
if (bytes != quota)
test_fail("%s: server served: %zd" , tst_name, bytes);
else
test_ok("%s: server alive" , tst_name);
}
synchronize_threads(); /* 3: counters checks */
if (test_get_tcp_counters(sk, &cnt2))
test_error("test_get_tcp_counters()" );
after_cnt = netstat_get_one(cnt_name, NULL);
test_assert_counters(tst_name, &cnt1, &cnt2, cnt_expected);
if (after_cnt <= before_cnt) {
test_fail("%s(server): %s counter did not increase: %" PRIu64 " <= %" PRIu64,
tst_name, cnt_name, after_cnt, before_cnt);
} else {
test_ok("%s(server): counter %s increased %" PRIu64 " => %" PRIu64,
tst_name, cnt_name, before_cnt, after_cnt);
}
/*
* Before close ( ) as that will send FIN and move the peer in TCP_CLOSE
* and that will prevent reading AO counters from the peer ' s socket .
*/
synchronize_threads(); /* 4: verified => closed */
out:
close(sk);
}
static void *server_fn(void *arg)
{
unsigned int port = test_server_port;
try_server_run("TCP-AO migrate to another socket (server)" , port++,
0 , TEST_CNT_GOOD);
try_server_run("TCP-AO with wrong send ISN (server)" , port++,
FAULT_TIMEOUT, TEST_CNT_BAD);
try_server_run("TCP-AO with wrong receive ISN (server)" , port++,
FAULT_TIMEOUT, TEST_CNT_BAD);
try_server_run("TCP-AO with wrong send SEQ ext number (server)" , port++,
FAULT_TIMEOUT, TEST_CNT_BAD);
try_server_run("TCP-AO with wrong receive SEQ ext number (server)" ,
port++, FAULT_TIMEOUT, TEST_CNT_NS_BAD | TEST_CNT_GOOD);
synchronize_threads(); /* don't race to exit: client exits */
return NULL;
}
static void test_get_sk_checkpoint(unsigned int server_port, sockaddr_af *saddr,
struct tcp_sock_state *img,
struct tcp_ao_repair *ao_img)
{
int sk;
sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP);
if (sk < 0 )
test_error("socket()" );
if (test_add_key(sk, DEFAULT_TEST_PASSWORD, this_ip_dest, -1 , 100 , 100 ))
test_error("setsockopt(TCP_AO_ADD_KEY)" );
synchronize_threads(); /* 1: MKT added => connect() */
if (test_connect_socket(sk, this_ip_dest, server_port) <= 0 )
test_error("failed to connect()" );
synchronize_threads(); /* 2: accepted => send data */
if (test_client_verify(sk, msg_len, nr_packets))
test_fail("pre-migrate verify failed" );
test_enable_repair(sk);
test_sock_checkpoint(sk, img, saddr);
test_ao_checkpoint(sk, ao_img);
test_kill_sk(sk);
}
static void test_sk_restore(const char *tst_name, unsigned int server_port,
sockaddr_af *saddr, struct tcp_sock_state *img,
struct tcp_ao_repair *ao_img,
fault_t inj, test_cnt cnt_expected)
{
test_cnt poll_cnt = (cnt_expected == TEST_CNT_GOOD) ? 0 : cnt_expected;
const char *cnt_name = "TCPAOGood" ;
struct tcp_counters cnt1, cnt2;
uint64_t before_cnt, after_cnt;
int sk, dummy;
if (fault(TIMEOUT))
cnt_name = "TCPAOBad" ;
before_cnt = netstat_get_one(cnt_name, NULL);
sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP);
if (sk < 0 )
test_error("socket()" );
test_enable_repair(sk);
test_sock_restore(sk, img, saddr, this_ip_dest, server_port);
if (test_add_repaired_key(sk, DEFAULT_TEST_PASSWORD, 0 , this_ip_dest, -1 , 100 , 100 ))
test_error("setsockopt(TCP_AO_ADD_KEY)" );
test_ao_restore(sk, ao_img);
if (test_get_tcp_counters(sk, &cnt1))
test_error("test_get_tcp_counters()" );
test_disable_repair(sk);
test_sock_state_free(img);
if (test_skpair_client(sk, msg_len, nr_packets, poll_cnt, &dummy)) {
if (fault(TIMEOUT))
test_ok("%s: post-migrate connection is broken" , tst_name);
else
test_fail("%s: post-migrate connection is working" , tst_name);
} else {
if (fault(TIMEOUT))
test_fail("%s: post-migrate connection is working" , tst_name);
else
test_ok("%s: post-migrate connection is alive" , tst_name);
}
synchronize_threads(); /* 3: counters checks */
if (test_get_tcp_counters(sk, &cnt2))
test_error("test_get_tcp_counters()" );
after_cnt = netstat_get_one(cnt_name, NULL);
test_assert_counters(tst_name, &cnt1, &cnt2, cnt_expected);
if (after_cnt <= before_cnt) {
test_fail("%s: %s counter did not increase: %" PRIu64 " <= %" PRIu64,
tst_name, cnt_name, after_cnt, before_cnt);
} else {
test_ok("%s: counter %s increased %" PRIu64 " => %" PRIu64,
tst_name, cnt_name, before_cnt, after_cnt);
}
synchronize_threads(); /* 4: verified => closed */
close(sk);
}
static void *client_fn(void *arg)
{
unsigned int port = test_server_port;
struct tcp_sock_state tcp_img;
struct tcp_ao_repair ao_img;
sockaddr_af saddr;
test_get_sk_checkpoint(port, &saddr, &tcp_img, &ao_img);
test_sk_restore("TCP-AO migrate to another socket (client)" , port++,
&saddr, &tcp_img, &ao_img, 0 , TEST_CNT_GOOD);
test_get_sk_checkpoint(port, &saddr, &tcp_img, &ao_img);
ao_img.snt_isn += 1 ;
trace_ao_event_expect(TCP_AO_MISMATCH, this_ip_addr, this_ip_dest,
-1 , port, 0 , -1 , -1 , -1 , -1 , -1 , 100 , 100 , -1 );
trace_ao_event_expect(TCP_AO_MISMATCH, this_ip_dest, this_ip_addr,
port, -1 , 0 , -1 , -1 , -1 , -1 , -1 , 100 , 100 , -1 );
test_sk_restore("TCP-AO with wrong send ISN (client)" , port++,
&saddr, &tcp_img, &ao_img, FAULT_TIMEOUT, TEST_CNT_BAD);
test_get_sk_checkpoint(port, &saddr, &tcp_img, &ao_img);
ao_img.rcv_isn += 1 ;
trace_ao_event_expect(TCP_AO_MISMATCH, this_ip_addr, this_ip_dest,
-1 , port, 0 , -1 , -1 , -1 , -1 , -1 , 100 , 100 , -1 );
trace_ao_event_expect(TCP_AO_MISMATCH, this_ip_dest, this_ip_addr,
port, -1 , 0 , -1 , -1 , -1 , -1 , -1 , 100 , 100 , -1 );
test_sk_restore("TCP-AO with wrong receive ISN (client)" , port++,
&saddr, &tcp_img, &ao_img, FAULT_TIMEOUT, TEST_CNT_BAD);
test_get_sk_checkpoint(port, &saddr, &tcp_img, &ao_img);
ao_img.snd_sne += 1 ;
trace_ao_event_expect(TCP_AO_MISMATCH, this_ip_addr, this_ip_dest,
-1 , port, 0 , -1 , -1 , -1 , -1 , -1 , 100 , 100 , -1 );
/* not expecting server => client mismatches as only snd sne is broken */
test_sk_restore("TCP-AO with wrong send SEQ ext number (client)" ,
port++, &saddr, &tcp_img, &ao_img, FAULT_TIMEOUT,
TEST_CNT_NS_BAD | TEST_CNT_GOOD);
test_get_sk_checkpoint(port, &saddr, &tcp_img, &ao_img);
ao_img.rcv_sne += 1 ;
/* not expecting client => server mismatches as only rcv sne is broken */
trace_ao_event_expect(TCP_AO_MISMATCH, this_ip_dest, this_ip_addr,
port, -1 , 0 , -1 , -1 , -1 , -1 , -1 , 100 , 100 , -1 );
test_sk_restore("TCP-AO with wrong receive SEQ ext number (client)" ,
port++, &saddr, &tcp_img, &ao_img, FAULT_TIMEOUT,
TEST_CNT_NS_GOOD | TEST_CNT_BAD);
return NULL;
}
int main(int argc, char *argv[])
{
test_init(21 , server_fn, client_fn);
return 0 ;
}
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