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
tcp_server(int family)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
disconnect(int fd)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. */
test_sockmap_ktls_disconnect_after_delete(int family,int map)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
test_sockmap_ktls_update_fails_when_sock_has_ulp(int family,int map)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
fmt_test_name(const char * subtest_name,int family,enum bpf_map_type map_type)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
run_tests(int family,enum bpf_map_type map_type)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
test_sockmap_ktls(void)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