1 // SPDX-License-Identifier: GPL-2.0 2 #include <test_progs.h> 3 #include <network_helpers.h> 4 #include "test_bpf_nf.skel.h" 5 #include "test_bpf_nf_fail.skel.h" 6 7 static char log_buf[1024 * 1024]; 8 9 struct { 10 const char *prog_name; 11 const char *err_msg; 12 } test_bpf_nf_fail_tests[] = { 13 { "alloc_release", "kernel function bpf_ct_release args#0 expected pointer to STRUCT nf_conn but" }, 14 { "insert_insert", "kernel function bpf_ct_insert_entry args#0 expected pointer to STRUCT nf_conn___init but" }, 15 { "lookup_insert", "kernel function bpf_ct_insert_entry args#0 expected pointer to STRUCT nf_conn___init but" }, 16 { "set_timeout_after_insert", "kernel function bpf_ct_set_timeout args#0 expected pointer to STRUCT nf_conn___init but" }, 17 { "set_status_after_insert", "kernel function bpf_ct_set_status args#0 expected pointer to STRUCT nf_conn___init but" }, 18 { "change_timeout_after_alloc", "kernel function bpf_ct_change_timeout args#0 expected pointer to STRUCT nf_conn but" }, 19 { "change_status_after_alloc", "kernel function bpf_ct_change_status args#0 expected pointer to STRUCT nf_conn but" }, 20 }; 21 22 enum { 23 TEST_XDP, 24 TEST_TC_BPF, 25 }; 26 27 #define TIMEOUT_MS 3000 28 29 static int connect_to_server(int srv_fd) 30 { 31 int fd = -1; 32 33 fd = socket(AF_INET, SOCK_STREAM, 0); 34 if (!ASSERT_GE(fd, 0, "socket")) 35 goto out; 36 37 if (!ASSERT_EQ(connect_fd_to_fd(fd, srv_fd, TIMEOUT_MS), 0, "connect_fd_to_fd")) { 38 close(fd); 39 fd = -1; 40 } 41 out: 42 return fd; 43 } 44 45 static void test_bpf_nf_ct(int mode) 46 { 47 const char *iptables = "iptables -t raw %s PREROUTING -j CT"; 48 int srv_fd = -1, client_fd = -1, srv_client_fd = -1; 49 struct sockaddr_in peer_addr = {}; 50 struct test_bpf_nf *skel; 51 int prog_fd, err; 52 socklen_t len; 53 u16 srv_port; 54 char cmd[64]; 55 LIBBPF_OPTS(bpf_test_run_opts, topts, 56 .data_in = &pkt_v4, 57 .data_size_in = sizeof(pkt_v4), 58 .repeat = 1, 59 ); 60 61 skel = test_bpf_nf__open_and_load(); 62 if (!ASSERT_OK_PTR(skel, "test_bpf_nf__open_and_load")) 63 return; 64 65 /* Enable connection tracking */ 66 snprintf(cmd, sizeof(cmd), iptables, "-A"); 67 if (!ASSERT_OK(system(cmd), "iptables")) 68 goto end; 69 70 srv_port = (mode == TEST_XDP) ? 5005 : 5006; 71 srv_fd = start_server(AF_INET, SOCK_STREAM, "127.0.0.1", srv_port, TIMEOUT_MS); 72 if (!ASSERT_GE(srv_fd, 0, "start_server")) 73 goto end; 74 75 client_fd = connect_to_server(srv_fd); 76 if (!ASSERT_GE(client_fd, 0, "connect_to_server")) 77 goto end; 78 79 len = sizeof(peer_addr); 80 srv_client_fd = accept(srv_fd, (struct sockaddr *)&peer_addr, &len); 81 if (!ASSERT_GE(srv_client_fd, 0, "accept")) 82 goto end; 83 if (!ASSERT_EQ(len, sizeof(struct sockaddr_in), "sockaddr len")) 84 goto end; 85 86 skel->bss->saddr = peer_addr.sin_addr.s_addr; 87 skel->bss->sport = peer_addr.sin_port; 88 skel->bss->daddr = peer_addr.sin_addr.s_addr; 89 skel->bss->dport = htons(srv_port); 90 91 if (mode == TEST_XDP) 92 prog_fd = bpf_program__fd(skel->progs.nf_xdp_ct_test); 93 else 94 prog_fd = bpf_program__fd(skel->progs.nf_skb_ct_test); 95 96 err = bpf_prog_test_run_opts(prog_fd, &topts); 97 if (!ASSERT_OK(err, "bpf_prog_test_run")) 98 goto end; 99 100 ASSERT_EQ(skel->bss->test_einval_bpf_tuple, -EINVAL, "Test EINVAL for NULL bpf_tuple"); 101 ASSERT_EQ(skel->bss->test_einval_reserved, -EINVAL, "Test EINVAL for reserved not set to 0"); 102 ASSERT_EQ(skel->bss->test_einval_netns_id, -EINVAL, "Test EINVAL for netns_id < -1"); 103 ASSERT_EQ(skel->bss->test_einval_len_opts, -EINVAL, "Test EINVAL for len__opts != NF_BPF_CT_OPTS_SZ"); 104 ASSERT_EQ(skel->bss->test_eproto_l4proto, -EPROTO, "Test EPROTO for l4proto != TCP or UDP"); 105 ASSERT_EQ(skel->bss->test_enonet_netns_id, -ENONET, "Test ENONET for bad but valid netns_id"); 106 ASSERT_EQ(skel->bss->test_enoent_lookup, -ENOENT, "Test ENOENT for failed lookup"); 107 ASSERT_EQ(skel->bss->test_eafnosupport, -EAFNOSUPPORT, "Test EAFNOSUPPORT for invalid len__tuple"); 108 ASSERT_EQ(skel->data->test_alloc_entry, 0, "Test for alloc new entry"); 109 ASSERT_EQ(skel->data->test_insert_entry, 0, "Test for insert new entry"); 110 ASSERT_EQ(skel->data->test_succ_lookup, 0, "Test for successful lookup"); 111 /* allow some tolerance for test_delta_timeout value to avoid races. */ 112 ASSERT_GT(skel->bss->test_delta_timeout, 8, "Test for min ct timeout update"); 113 ASSERT_LE(skel->bss->test_delta_timeout, 10, "Test for max ct timeout update"); 114 /* expected status is IPS_SEEN_REPLY */ 115 ASSERT_EQ(skel->bss->test_status, 2, "Test for ct status update "); 116 ASSERT_EQ(skel->data->test_exist_lookup, 0, "Test existing connection lookup"); 117 end: 118 if (srv_client_fd != -1) 119 close(srv_client_fd); 120 if (client_fd != -1) 121 close(client_fd); 122 if (srv_fd != -1) 123 close(srv_fd); 124 snprintf(cmd, sizeof(cmd), iptables, "-D"); 125 system(cmd); 126 test_bpf_nf__destroy(skel); 127 } 128 129 static void test_bpf_nf_ct_fail(const char *prog_name, const char *err_msg) 130 { 131 LIBBPF_OPTS(bpf_object_open_opts, opts, .kernel_log_buf = log_buf, 132 .kernel_log_size = sizeof(log_buf), 133 .kernel_log_level = 1); 134 struct test_bpf_nf_fail *skel; 135 struct bpf_program *prog; 136 int ret; 137 138 skel = test_bpf_nf_fail__open_opts(&opts); 139 if (!ASSERT_OK_PTR(skel, "test_bpf_nf_fail__open")) 140 return; 141 142 prog = bpf_object__find_program_by_name(skel->obj, prog_name); 143 if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name")) 144 goto end; 145 146 bpf_program__set_autoload(prog, true); 147 148 ret = test_bpf_nf_fail__load(skel); 149 if (!ASSERT_ERR(ret, "test_bpf_nf_fail__load must fail")) 150 goto end; 151 152 if (!ASSERT_OK_PTR(strstr(log_buf, err_msg), "expected error message")) { 153 fprintf(stderr, "Expected: %s\n", err_msg); 154 fprintf(stderr, "Verifier: %s\n", log_buf); 155 } 156 157 end: 158 test_bpf_nf_fail__destroy(skel); 159 } 160 161 void test_bpf_nf(void) 162 { 163 int i; 164 if (test__start_subtest("xdp-ct")) 165 test_bpf_nf_ct(TEST_XDP); 166 if (test__start_subtest("tc-bpf-ct")) 167 test_bpf_nf_ct(TEST_TC_BPF); 168 for (i = 0; i < ARRAY_SIZE(test_bpf_nf_fail_tests); i++) { 169 if (test__start_subtest(test_bpf_nf_fail_tests[i].prog_name)) 170 test_bpf_nf_ct_fail(test_bpf_nf_fail_tests[i].prog_name, 171 test_bpf_nf_fail_tests[i].err_msg); 172 } 173 } 174