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// 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)
{
const char *cnt_name = "TCPAOGood";
struct tcp_ao_counters ao1, ao2;
uint64_t before_cnt, after_cnt;
int sk, lsk;
time_t timeout;
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_ao_counters(sk, &ao1))
test_error("test_get_tcp_ao_counters()");
timeout = fault(TIMEOUT) ? TEST_RETRANSMIT_SEC : TEST_TIMEOUT_SEC;
bytes = test_server_run(sk, quota, timeout);
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);
}
if (test_get_tcp_ao_counters(sk, &ao2))
test_error("test_get_tcp_ao_counters()");
after_cnt = netstat_get_one(cnt_name, NULL);
test_tcp_ao_counters_cmp(tst_name, &ao1, &ao2, cnt_expected);
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);
}
/*
* 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(); /* 3: 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", port++,
0, TEST_CNT_GOOD);
try_server_run("TCP-AO with wrong send ISN", port++,
FAULT_TIMEOUT, TEST_CNT_BAD);
try_server_run("TCP-AO with wrong receive ISN", port++,
FAULT_TIMEOUT, TEST_CNT_BAD);
try_server_run("TCP-AO with wrong send SEQ ext number", port++,
FAULT_TIMEOUT, TEST_CNT_BAD);
try_server_run("TCP-AO with wrong receive SEQ ext number", 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_TIMEOUT_SEC))
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)
{
const char *cnt_name = "TCPAOGood";
struct tcp_ao_counters ao1, ao2;
uint64_t before_cnt, after_cnt;
time_t timeout;
int sk;
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_ao_counters(sk, &ao1))
test_error("test_get_tcp_ao_counters()");
test_disable_repair(sk);
test_sock_state_free(img);
timeout = fault(TIMEOUT) ? TEST_RETRANSMIT_SEC : TEST_TIMEOUT_SEC;
if (test_client_verify(sk, msg_len, nr_packets, timeout)) {
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 still working", tst_name);
else
test_ok("%s: post-migrate connection is alive", tst_name);
}
if (test_get_tcp_ao_counters(sk, &ao2))
test_error("test_get_tcp_ao_counters()");
after_cnt = netstat_get_one(cnt_name, NULL);
test_tcp_ao_counters_cmp(tst_name, &ao1, &ao2, cnt_expected);
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);
}
synchronize_threads(); /* 3: 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", 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;
test_sk_restore("TCP-AO with wrong send ISN", 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;
test_sk_restore("TCP-AO with wrong receive ISN", 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;
test_sk_restore("TCP-AO with wrong send SEQ ext number", 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;
test_sk_restore("TCP-AO with wrong receive SEQ ext number", 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(20, server_fn, client_fn);
return 0;
}
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