@@ -3,6 +3,7 @@ TEST_BOTH_AF := bench-lookups
TEST_BOTH_AF += connect
TEST_BOTH_AF += connect-deny
TEST_BOTH_AF += icmps-accept icmps-discard
+TEST_BOTH_AF += restore
TEST_BOTH_AF += setsockopt-closed
TEST_BOTH_AF += unsigned-md5
new file mode 100644
@@ -0,0 +1,236 @@
+// 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;
+}