190 lines · c
1// SPDX-License-Identifier: GPL-2.02#include <test_progs.h>3#include <network_helpers.h>4#include <linux/netfilter/nf_conntrack_common.h>5#include "test_bpf_nf.skel.h"6#include "test_bpf_nf_fail.skel.h"7 8static char log_buf[1024 * 1024];9 10struct {11 const char *prog_name;12 const char *err_msg;13} test_bpf_nf_fail_tests[] = {14 { "alloc_release", "kernel function bpf_ct_release args#0 expected pointer to STRUCT nf_conn but" },15 { "insert_insert", "kernel function bpf_ct_insert_entry args#0 expected pointer to STRUCT nf_conn___init but" },16 { "lookup_insert", "kernel function bpf_ct_insert_entry args#0 expected pointer to STRUCT nf_conn___init but" },17 { "set_timeout_after_insert", "kernel function bpf_ct_set_timeout args#0 expected pointer to STRUCT nf_conn___init but" },18 { "set_status_after_insert", "kernel function bpf_ct_set_status args#0 expected pointer to STRUCT nf_conn___init but" },19 { "change_timeout_after_alloc", "kernel function bpf_ct_change_timeout args#0 expected pointer to STRUCT nf_conn but" },20 { "change_status_after_alloc", "kernel function bpf_ct_change_status args#0 expected pointer to STRUCT nf_conn but" },21 { "write_not_allowlisted_field", "no write support to nf_conn at off" },22};23 24enum {25 TEST_XDP,26 TEST_TC_BPF,27};28 29#define TIMEOUT_MS 300030#define IPS_STATUS_MASK (IPS_CONFIRMED | IPS_SEEN_REPLY | \31 IPS_SRC_NAT_DONE | IPS_DST_NAT_DONE | \32 IPS_SRC_NAT | IPS_DST_NAT)33 34static int connect_to_server(int srv_fd)35{36 int fd = -1;37 38 fd = socket(AF_INET, SOCK_STREAM, 0);39 if (!ASSERT_GE(fd, 0, "socket"))40 goto out;41 42 if (!ASSERT_EQ(connect_fd_to_fd(fd, srv_fd, TIMEOUT_MS), 0, "connect_fd_to_fd")) {43 close(fd);44 fd = -1;45 }46out:47 return fd;48}49 50static void test_bpf_nf_ct(int mode)51{52 const char *iptables = "iptables-legacy -t raw %s PREROUTING -j CONNMARK --set-mark 42/0";53 int srv_fd = -1, client_fd = -1, srv_client_fd = -1;54 struct sockaddr_in peer_addr = {};55 struct test_bpf_nf *skel;56 int prog_fd, err;57 socklen_t len;58 u16 srv_port;59 char cmd[128];60 LIBBPF_OPTS(bpf_test_run_opts, topts,61 .data_in = &pkt_v4,62 .data_size_in = sizeof(pkt_v4),63 .repeat = 1,64 );65 66 skel = test_bpf_nf__open_and_load();67 if (!ASSERT_OK_PTR(skel, "test_bpf_nf__open_and_load"))68 return;69 70 /* Enable connection tracking */71 snprintf(cmd, sizeof(cmd), iptables, "-A");72 if (!ASSERT_OK(system(cmd), cmd))73 goto end;74 75 srv_port = (mode == TEST_XDP) ? 5005 : 5006;76 srv_fd = start_server(AF_INET, SOCK_STREAM, "127.0.0.1", srv_port, TIMEOUT_MS);77 if (!ASSERT_GE(srv_fd, 0, "start_server"))78 goto end;79 80 client_fd = connect_to_server(srv_fd);81 if (!ASSERT_GE(client_fd, 0, "connect_to_server"))82 goto end;83 84 len = sizeof(peer_addr);85 srv_client_fd = accept(srv_fd, (struct sockaddr *)&peer_addr, &len);86 if (!ASSERT_GE(srv_client_fd, 0, "accept"))87 goto end;88 if (!ASSERT_EQ(len, sizeof(struct sockaddr_in), "sockaddr len"))89 goto end;90 91 skel->bss->saddr = peer_addr.sin_addr.s_addr;92 skel->bss->sport = peer_addr.sin_port;93 skel->bss->daddr = peer_addr.sin_addr.s_addr;94 skel->bss->dport = htons(srv_port);95 96 if (mode == TEST_XDP)97 prog_fd = bpf_program__fd(skel->progs.nf_xdp_ct_test);98 else99 prog_fd = bpf_program__fd(skel->progs.nf_skb_ct_test);100 101 err = bpf_prog_test_run_opts(prog_fd, &topts);102 if (!ASSERT_OK(err, "bpf_prog_test_run"))103 goto end;104 105 ASSERT_EQ(skel->bss->test_einval_bpf_tuple, -EINVAL, "Test EINVAL for NULL bpf_tuple");106 ASSERT_EQ(skel->bss->test_einval_reserved, -EINVAL, "Test EINVAL for reserved not set to 0");107 ASSERT_EQ(skel->bss->test_einval_reserved_new, -EINVAL, "Test EINVAL for reserved in new struct not set to 0");108 ASSERT_EQ(skel->bss->test_einval_netns_id, -EINVAL, "Test EINVAL for netns_id < -1");109 ASSERT_EQ(skel->bss->test_einval_len_opts, -EINVAL, "Test EINVAL for len__opts != NF_BPF_CT_OPTS_SZ");110 ASSERT_EQ(skel->bss->test_eproto_l4proto, -EPROTO, "Test EPROTO for l4proto != TCP or UDP");111 ASSERT_EQ(skel->bss->test_enonet_netns_id, -ENONET, "Test ENONET for bad but valid netns_id");112 ASSERT_EQ(skel->bss->test_enoent_lookup, -ENOENT, "Test ENOENT for failed lookup");113 ASSERT_EQ(skel->bss->test_eafnosupport, -EAFNOSUPPORT, "Test EAFNOSUPPORT for invalid len__tuple");114 ASSERT_EQ(skel->data->test_alloc_entry, 0, "Test for alloc new entry");115 ASSERT_EQ(skel->data->test_insert_entry, 0, "Test for insert new entry");116 ASSERT_EQ(skel->data->test_succ_lookup, 0, "Test for successful lookup");117 /* allow some tolerance for test_delta_timeout value to avoid races. */118 ASSERT_GT(skel->bss->test_delta_timeout, 8, "Test for min ct timeout update");119 ASSERT_LE(skel->bss->test_delta_timeout, 10, "Test for max ct timeout update");120 ASSERT_EQ(skel->bss->test_insert_lookup_mark, 77, "Test for insert and lookup mark value");121 ASSERT_EQ(skel->bss->test_status, IPS_STATUS_MASK, "Test for ct status update ");122 ASSERT_EQ(skel->data->test_exist_lookup, 0, "Test existing connection lookup");123 ASSERT_EQ(skel->bss->test_exist_lookup_mark, 43, "Test existing connection lookup ctmark");124 ASSERT_EQ(skel->data->test_snat_addr, 0, "Test for source natting");125 ASSERT_EQ(skel->data->test_dnat_addr, 0, "Test for destination natting");126 ASSERT_EQ(skel->data->test_ct_zone_id_alloc_entry, 0, "Test for alloc new entry in specified ct zone");127 ASSERT_EQ(skel->data->test_ct_zone_id_insert_entry, 0, "Test for insert new entry in specified ct zone");128 ASSERT_EQ(skel->data->test_ct_zone_id_succ_lookup, 0, "Test for successful lookup in specified ct_zone");129 ASSERT_EQ(skel->bss->test_ct_zone_dir_enoent_lookup, -ENOENT, "Test ENOENT for lookup with wrong ct zone dir");130 ASSERT_EQ(skel->bss->test_ct_zone_id_enoent_lookup, -ENOENT, "Test ENOENT for lookup in wrong ct zone");131 132end:133 if (client_fd != -1)134 close(client_fd);135 if (srv_client_fd != -1)136 close(srv_client_fd);137 if (srv_fd != -1)138 close(srv_fd);139 140 snprintf(cmd, sizeof(cmd), iptables, "-D");141 system(cmd);142 test_bpf_nf__destroy(skel);143}144 145static void test_bpf_nf_ct_fail(const char *prog_name, const char *err_msg)146{147 LIBBPF_OPTS(bpf_object_open_opts, opts, .kernel_log_buf = log_buf,148 .kernel_log_size = sizeof(log_buf),149 .kernel_log_level = 1);150 struct test_bpf_nf_fail *skel;151 struct bpf_program *prog;152 int ret;153 154 skel = test_bpf_nf_fail__open_opts(&opts);155 if (!ASSERT_OK_PTR(skel, "test_bpf_nf_fail__open"))156 return;157 158 prog = bpf_object__find_program_by_name(skel->obj, prog_name);159 if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))160 goto end;161 162 bpf_program__set_autoload(prog, true);163 164 ret = test_bpf_nf_fail__load(skel);165 if (!ASSERT_ERR(ret, "test_bpf_nf_fail__load must fail"))166 goto end;167 168 if (!ASSERT_OK_PTR(strstr(log_buf, err_msg), "expected error message")) {169 fprintf(stderr, "Expected: %s\n", err_msg);170 fprintf(stderr, "Verifier: %s\n", log_buf);171 }172 173end:174 test_bpf_nf_fail__destroy(skel);175}176 177void test_bpf_nf(void)178{179 int i;180 if (test__start_subtest("xdp-ct"))181 test_bpf_nf_ct(TEST_XDP);182 if (test__start_subtest("tc-bpf-ct"))183 test_bpf_nf_ct(TEST_TC_BPF);184 for (i = 0; i < ARRAY_SIZE(test_bpf_nf_fail_tests); i++) {185 if (test__start_subtest(test_bpf_nf_fail_tests[i].prog_name))186 test_bpf_nf_ct_fail(test_bpf_nf_fail_tests[i].prog_name,187 test_bpf_nf_fail_tests[i].err_msg);188 }189}190