1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2020 Cloudflare 3 /* 4 * Tests for sockmap/sockhash holding kTLS sockets. 5 */ 6 7 #include <netinet/tcp.h> 8 #include "test_progs.h" 9 10 #define MAX_TEST_NAME 80 11 #define TCP_ULP 31 12 13 static int tcp_server(int family) 14 { 15 int err, s; 16 17 s = socket(family, SOCK_STREAM, 0); 18 if (!ASSERT_GE(s, 0, "socket")) 19 return -1; 20 21 err = listen(s, SOMAXCONN); 22 if (!ASSERT_OK(err, "listen")) 23 return -1; 24 25 return s; 26 } 27 28 static int disconnect(int fd) 29 { 30 struct sockaddr unspec = { AF_UNSPEC }; 31 32 return connect(fd, &unspec, sizeof(unspec)); 33 } 34 35 /* Disconnect (unhash) a kTLS socket after removing it from sockmap. */ 36 static void test_sockmap_ktls_disconnect_after_delete(int family, int map) 37 { 38 struct sockaddr_storage addr = {0}; 39 socklen_t len = sizeof(addr); 40 int err, cli, srv, zero = 0; 41 42 srv = tcp_server(family); 43 if (srv == -1) 44 return; 45 46 err = getsockname(srv, (struct sockaddr *)&addr, &len); 47 if (!ASSERT_OK(err, "getsockopt")) 48 goto close_srv; 49 50 cli = socket(family, SOCK_STREAM, 0); 51 if (!ASSERT_GE(cli, 0, "socket")) 52 goto close_srv; 53 54 err = connect(cli, (struct sockaddr *)&addr, len); 55 if (!ASSERT_OK(err, "connect")) 56 goto close_cli; 57 58 err = bpf_map_update_elem(map, &zero, &cli, 0); 59 if (!ASSERT_OK(err, "bpf_map_update_elem")) 60 goto close_cli; 61 62 err = setsockopt(cli, IPPROTO_TCP, TCP_ULP, "tls", strlen("tls")); 63 if (!ASSERT_OK(err, "setsockopt(TCP_ULP)")) 64 goto close_cli; 65 66 err = bpf_map_delete_elem(map, &zero); 67 if (!ASSERT_OK(err, "bpf_map_delete_elem")) 68 goto close_cli; 69 70 err = disconnect(cli); 71 72 close_cli: 73 close(cli); 74 close_srv: 75 close(srv); 76 } 77 78 static void test_sockmap_ktls_update_fails_when_sock_has_ulp(int family, int map) 79 { 80 struct sockaddr_storage addr = {}; 81 socklen_t len = sizeof(addr); 82 struct sockaddr_in6 *v6; 83 struct sockaddr_in *v4; 84 int err, s, zero = 0; 85 86 switch (family) { 87 case AF_INET: 88 v4 = (struct sockaddr_in *)&addr; 89 v4->sin_family = AF_INET; 90 break; 91 case AF_INET6: 92 v6 = (struct sockaddr_in6 *)&addr; 93 v6->sin6_family = AF_INET6; 94 break; 95 default: 96 PRINT_FAIL("unsupported socket family %d", family); 97 return; 98 } 99 100 s = socket(family, SOCK_STREAM, 0); 101 if (!ASSERT_GE(s, 0, "socket")) 102 return; 103 104 err = bind(s, (struct sockaddr *)&addr, len); 105 if (!ASSERT_OK(err, "bind")) 106 goto close; 107 108 err = getsockname(s, (struct sockaddr *)&addr, &len); 109 if (!ASSERT_OK(err, "getsockname")) 110 goto close; 111 112 err = connect(s, (struct sockaddr *)&addr, len); 113 if (!ASSERT_OK(err, "connect")) 114 goto close; 115 116 /* save sk->sk_prot and set it to tls_prots */ 117 err = setsockopt(s, IPPROTO_TCP, TCP_ULP, "tls", strlen("tls")); 118 if (!ASSERT_OK(err, "setsockopt(TCP_ULP)")) 119 goto close; 120 121 /* sockmap update should not affect saved sk_prot */ 122 err = bpf_map_update_elem(map, &zero, &s, BPF_ANY); 123 if (!ASSERT_ERR(err, "sockmap update elem")) 124 goto close; 125 126 /* call sk->sk_prot->setsockopt to dispatch to saved sk_prot */ 127 err = setsockopt(s, IPPROTO_TCP, TCP_NODELAY, &zero, sizeof(zero)); 128 ASSERT_OK(err, "setsockopt(TCP_NODELAY)"); 129 130 close: 131 close(s); 132 } 133 134 static const char *fmt_test_name(const char *subtest_name, int family, 135 enum bpf_map_type map_type) 136 { 137 const char *map_type_str = BPF_MAP_TYPE_SOCKMAP ? "SOCKMAP" : "SOCKHASH"; 138 const char *family_str = AF_INET ? "IPv4" : "IPv6"; 139 static char test_name[MAX_TEST_NAME]; 140 141 snprintf(test_name, MAX_TEST_NAME, 142 "sockmap_ktls %s %s %s", 143 subtest_name, family_str, map_type_str); 144 145 return test_name; 146 } 147 148 static void run_tests(int family, enum bpf_map_type map_type) 149 { 150 int map; 151 152 map = bpf_map_create(map_type, NULL, sizeof(int), sizeof(int), 1, NULL); 153 if (!ASSERT_GE(map, 0, "bpf_map_create")) 154 return; 155 156 if (test__start_subtest(fmt_test_name("disconnect_after_delete", family, map_type))) 157 test_sockmap_ktls_disconnect_after_delete(family, map); 158 if (test__start_subtest(fmt_test_name("update_fails_when_sock_has_ulp", family, map_type))) 159 test_sockmap_ktls_update_fails_when_sock_has_ulp(family, map); 160 161 close(map); 162 } 163 164 void test_sockmap_ktls(void) 165 { 166 run_tests(AF_INET, BPF_MAP_TYPE_SOCKMAP); 167 run_tests(AF_INET, BPF_MAP_TYPE_SOCKHASH); 168 run_tests(AF_INET6, BPF_MAP_TYPE_SOCKMAP); 169 run_tests(AF_INET6, BPF_MAP_TYPE_SOCKHASH); 170 } 171