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 "test_progs.h"
8 
9 #define MAX_TEST_NAME 80
10 #define TCP_ULP 31
11 
12 static int tcp_server(int family)
13 {
14 	int err, s;
15 
16 	s = socket(family, SOCK_STREAM, 0);
17 	if (CHECK_FAIL(s == -1)) {
18 		perror("socket");
19 		return -1;
20 	}
21 
22 	err = listen(s, SOMAXCONN);
23 	if (CHECK_FAIL(err)) {
24 		perror("listen");
25 		return -1;
26 	}
27 
28 	return s;
29 }
30 
31 static int disconnect(int fd)
32 {
33 	struct sockaddr unspec = { AF_UNSPEC };
34 
35 	return connect(fd, &unspec, sizeof(unspec));
36 }
37 
38 /* Disconnect (unhash) a kTLS socket after removing it from sockmap. */
39 static void test_sockmap_ktls_disconnect_after_delete(int family, int map)
40 {
41 	struct sockaddr_storage addr = {0};
42 	socklen_t len = sizeof(addr);
43 	int err, cli, srv, zero = 0;
44 
45 	srv = tcp_server(family);
46 	if (srv == -1)
47 		return;
48 
49 	err = getsockname(srv, (struct sockaddr *)&addr, &len);
50 	if (CHECK_FAIL(err)) {
51 		perror("getsockopt");
52 		goto close_srv;
53 	}
54 
55 	cli = socket(family, SOCK_STREAM, 0);
56 	if (CHECK_FAIL(cli == -1)) {
57 		perror("socket");
58 		goto close_srv;
59 	}
60 
61 	err = connect(cli, (struct sockaddr *)&addr, len);
62 	if (CHECK_FAIL(err)) {
63 		perror("connect");
64 		goto close_cli;
65 	}
66 
67 	err = bpf_map_update_elem(map, &zero, &cli, 0);
68 	if (CHECK_FAIL(err)) {
69 		perror("bpf_map_update_elem");
70 		goto close_cli;
71 	}
72 
73 	err = setsockopt(cli, IPPROTO_TCP, TCP_ULP, "tls", strlen("tls"));
74 	if (CHECK_FAIL(err)) {
75 		perror("setsockopt(TCP_ULP)");
76 		goto close_cli;
77 	}
78 
79 	err = bpf_map_delete_elem(map, &zero);
80 	if (CHECK_FAIL(err)) {
81 		perror("bpf_map_delete_elem");
82 		goto close_cli;
83 	}
84 
85 	err = disconnect(cli);
86 	if (CHECK_FAIL(err))
87 		perror("disconnect");
88 
89 close_cli:
90 	close(cli);
91 close_srv:
92 	close(srv);
93 }
94 
95 static void run_tests(int family, enum bpf_map_type map_type)
96 {
97 	char test_name[MAX_TEST_NAME];
98 	int map;
99 
100 	map = bpf_create_map(map_type, sizeof(int), sizeof(int), 1, 0);
101 	if (CHECK_FAIL(map < 0)) {
102 		perror("bpf_map_create");
103 		return;
104 	}
105 
106 	snprintf(test_name, MAX_TEST_NAME,
107 		 "sockmap_ktls disconnect_after_delete %s %s",
108 		 family == AF_INET ? "IPv4" : "IPv6",
109 		 map_type == BPF_MAP_TYPE_SOCKMAP ? "SOCKMAP" : "SOCKHASH");
110 	if (!test__start_subtest(test_name))
111 		return;
112 
113 	test_sockmap_ktls_disconnect_after_delete(family, map);
114 
115 	close(map);
116 }
117 
118 void test_sockmap_ktls(void)
119 {
120 	run_tests(AF_INET, BPF_MAP_TYPE_SOCKMAP);
121 	run_tests(AF_INET, BPF_MAP_TYPE_SOCKHASH);
122 	run_tests(AF_INET6, BPF_MAP_TYPE_SOCKMAP);
123 	run_tests(AF_INET6, BPF_MAP_TYPE_SOCKHASH);
124 }
125