1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2018 Facebook
8 #include <netinet/in.h>
10 #include <sys/socket.h>
13 #include <bpf/libbpf.h>
15 #include "bpf_rlimit.h"
16 #include "cgroup_helpers.h"
18 #define CG_PATH "/foo"
19 #define SOCKET_COOKIE_PROG "./socket_cookie_prog.o"
21 struct socket_cookie {
26 static int start_server(void)
28 struct sockaddr_in6 addr;
31 fd = socket(AF_INET6, SOCK_STREAM, 0);
33 log_err("Failed to create server socket");
37 memset(&addr, 0, sizeof(addr));
38 addr.sin6_family = AF_INET6;
39 addr.sin6_addr = in6addr_loopback;
42 if (bind(fd, (const struct sockaddr *)&addr, sizeof(addr)) == -1) {
43 log_err("Failed to bind server socket");
47 if (listen(fd, 128) == -1) {
48 log_err("Failed to listen on server socket");
61 static int connect_to_server(int server_fd)
63 struct sockaddr_storage addr;
64 socklen_t len = sizeof(addr);
67 fd = socket(AF_INET6, SOCK_STREAM, 0);
69 log_err("Failed to create client socket");
73 if (getsockname(server_fd, (struct sockaddr *)&addr, &len)) {
74 log_err("Failed to get server addr");
78 if (connect(fd, (const struct sockaddr *)&addr, len) == -1) {
79 log_err("Fail to connect to server");
92 static int validate_map(struct bpf_map *map, int client_fd)
94 __u32 cookie_expected_value;
95 struct sockaddr_in6 addr;
96 socklen_t len = sizeof(addr);
97 struct socket_cookie val;
102 log_err("Map not found in BPF object");
106 map_fd = bpf_map__fd(map);
108 err = bpf_map_lookup_elem(map_fd, &client_fd, &val);
110 err = getsockname(client_fd, (struct sockaddr *)&addr, &len);
112 log_err("Can't get client local addr");
116 cookie_expected_value = (ntohs(addr.sin6_port) << 8) | 0xFF;
117 if (val.cookie_value != cookie_expected_value) {
118 log_err("Unexpected value in map: %x != %x", val.cookie_value,
119 cookie_expected_value);
130 static int run_test(int cgfd)
132 enum bpf_attach_type attach_type;
133 struct bpf_prog_load_attr attr;
134 struct bpf_program *prog;
135 struct bpf_object *pobj;
136 const char *prog_name;
142 memset(&attr, 0, sizeof(attr));
143 attr.file = SOCKET_COOKIE_PROG;
144 attr.prog_type = BPF_PROG_TYPE_UNSPEC;
145 attr.prog_flags = BPF_F_TEST_RND_HI32;
147 err = bpf_prog_load_xattr(&attr, &pobj, &prog_fd);
149 log_err("Failed to load %s", attr.file);
153 bpf_object__for_each_program(prog, pobj) {
154 prog_name = bpf_program__title(prog, /*needs_copy*/ false);
156 if (libbpf_attach_type_by_name(prog_name, &attach_type))
159 err = bpf_prog_attach(bpf_program__fd(prog), cgfd, attach_type,
160 BPF_F_ALLOW_OVERRIDE);
162 log_err("Failed to attach prog %s", prog_name);
167 server_fd = start_server();
171 client_fd = connect_to_server(server_fd);
175 if (validate_map(bpf_map__next(NULL, pobj), client_fd))
184 bpf_object__close(pobj);
185 printf("%s\n", err ? "FAILED" : "PASSED");
189 int main(int argc, char **argv)
194 cgfd = cgroup_setup_and_join(CG_PATH);
206 cleanup_cgroup_environment();