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// SPDX-License-Identifier: GPL-2.0
#include <inttypes.h>
#include <test_progs.h>
#include "test_tcpbpf.h"
#define CG_NAME "/tcpbpf-user-test"
/* 3 comes from one listening socket + both ends of the connection */
#define EXPECTED_CLOSE_EVENTS 3
#define EXPECT_EQ(expected, actual, fmt) \
do { \
if ((expected) != (actual)) { \
printf(" Value of: " #actual "\n" \
" Actual: %" fmt "\n" \
" Expected: %" fmt "\n", \
(actual), (expected)); \
ret--; \
} \
} while (0)
int verify_result(const struct tcpbpf_globals *result)
{
__u32 expected_events;
int ret = 0;
expected_events = ((1 << BPF_SOCK_OPS_TIMEOUT_INIT) |
(1 << BPF_SOCK_OPS_RWND_INIT) |
(1 << BPF_SOCK_OPS_TCP_CONNECT_CB) |
(1 << BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB) |
(1 << BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB) |
(1 << BPF_SOCK_OPS_NEEDS_ECN) |
(1 << BPF_SOCK_OPS_STATE_CB) |
(1 << BPF_SOCK_OPS_TCP_LISTEN_CB));
EXPECT_EQ(expected_events, result->event_map, "#" PRIx32);
EXPECT_EQ(501ULL, result->bytes_received, "llu");
EXPECT_EQ(1002ULL, result->bytes_acked, "llu");
EXPECT_EQ(1, result->data_segs_in, PRIu32);
EXPECT_EQ(1, result->data_segs_out, PRIu32);
EXPECT_EQ(0x80, result->bad_cb_test_rv, PRIu32);
EXPECT_EQ(0, result->good_cb_test_rv, PRIu32);
EXPECT_EQ(1, result->num_listen, PRIu32);
EXPECT_EQ(EXPECTED_CLOSE_EVENTS, result->num_close_events, PRIu32);
return ret;
}
int verify_sockopt_result(int sock_map_fd)
{
__u32 key = 0;
int ret = 0;
int res;
int rv;
/* check setsockopt for SAVE_SYN */
rv = bpf_map_lookup_elem(sock_map_fd, &key, &res);
EXPECT_EQ(0, rv, "d");
EXPECT_EQ(0, res, "d");
key = 1;
/* check getsockopt for SAVED_SYN */
rv = bpf_map_lookup_elem(sock_map_fd, &key, &res);
EXPECT_EQ(0, rv, "d");
EXPECT_EQ(1, res, "d");
return ret;
}
void test_tcpbpf_user(void)
{
const char *file = "test_tcpbpf_kern.o";
int prog_fd, map_fd, sock_map_fd;
struct tcpbpf_globals g = {0};
int error = EXIT_FAILURE;
struct bpf_object *obj;
int cg_fd = -1;
int retry = 10;
__u32 key = 0;
int rv;
cg_fd = test__join_cgroup(CG_NAME);
if (cg_fd < 0)
goto err;
if (bpf_prog_load(file, BPF_PROG_TYPE_SOCK_OPS, &obj, &prog_fd)) {
printf("FAILED: load_bpf_file failed for: %s\n", file);
goto err;
}
rv = bpf_prog_attach(prog_fd, cg_fd, BPF_CGROUP_SOCK_OPS, 0);
if (rv) {
printf("FAILED: bpf_prog_attach: %d (%s)\n",
error, strerror(errno));
goto err;
}
if (system("./tcp_server.py")) {
printf("FAILED: TCP server\n");
goto err;
}
map_fd = bpf_find_map(__func__, obj, "global_map");
if (map_fd < 0)
goto err;
sock_map_fd = bpf_find_map(__func__, obj, "sockopt_results");
if (sock_map_fd < 0)
goto err;
retry_lookup:
rv = bpf_map_lookup_elem(map_fd, &key, &g);
if (rv != 0) {
printf("FAILED: bpf_map_lookup_elem returns %d\n", rv);
goto err;
}
if (g.num_close_events != EXPECTED_CLOSE_EVENTS && retry--) {
printf("Unexpected number of close events (%d), retrying!\n",
g.num_close_events);
usleep(100);
goto retry_lookup;
}
if (verify_result(&g)) {
printf("FAILED: Wrong stats\n");
goto err;
}
if (verify_sockopt_result(sock_map_fd)) {
printf("FAILED: Wrong sockopt stats\n");
goto err;
}
error = 0;
err:
bpf_prog_detach(cg_fd, BPF_CGROUP_SOCK_OPS);
if (cg_fd != -1)
close(cg_fd);
CHECK_FAIL(error);
}
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