probe_user.c (2241B)
1// SPDX-License-Identifier: GPL-2.0 2#include <test_progs.h> 3 4/* TODO: corrupts other tests uses connect() */ 5void serial_test_probe_user(void) 6{ 7 const char *prog_name = "handle_sys_connect"; 8 const char *obj_file = "./test_probe_user.o"; 9 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts, ); 10 int err, results_map_fd, sock_fd, duration = 0; 11 struct sockaddr curr, orig, tmp; 12 struct sockaddr_in *in = (struct sockaddr_in *)&curr; 13 struct bpf_link *kprobe_link = NULL; 14 struct bpf_program *kprobe_prog; 15 struct bpf_object *obj; 16 static const int zero = 0; 17 18 obj = bpf_object__open_file(obj_file, &opts); 19 if (!ASSERT_OK_PTR(obj, "obj_open_file")) 20 return; 21 22 kprobe_prog = bpf_object__find_program_by_name(obj, prog_name); 23 if (CHECK(!kprobe_prog, "find_probe", 24 "prog '%s' not found\n", prog_name)) 25 goto cleanup; 26 27 err = bpf_object__load(obj); 28 if (CHECK(err, "obj_load", "err %d\n", err)) 29 goto cleanup; 30 31 results_map_fd = bpf_find_map(__func__, obj, "test_pro.bss"); 32 if (CHECK(results_map_fd < 0, "find_bss_map", 33 "err %d\n", results_map_fd)) 34 goto cleanup; 35 36 kprobe_link = bpf_program__attach(kprobe_prog); 37 if (!ASSERT_OK_PTR(kprobe_link, "attach_kprobe")) 38 goto cleanup; 39 40 memset(&curr, 0, sizeof(curr)); 41 in->sin_family = AF_INET; 42 in->sin_port = htons(5555); 43 in->sin_addr.s_addr = inet_addr("255.255.255.255"); 44 memcpy(&orig, &curr, sizeof(curr)); 45 46 sock_fd = socket(AF_INET, SOCK_STREAM, 0); 47 if (CHECK(sock_fd < 0, "create_sock_fd", "err %d\n", sock_fd)) 48 goto cleanup; 49 50 connect(sock_fd, &curr, sizeof(curr)); 51 close(sock_fd); 52 53 err = bpf_map_lookup_elem(results_map_fd, &zero, &tmp); 54 if (CHECK(err, "get_kprobe_res", 55 "failed to get kprobe res: %d\n", err)) 56 goto cleanup; 57 58 in = (struct sockaddr_in *)&tmp; 59 if (CHECK(memcmp(&tmp, &orig, sizeof(orig)), "check_kprobe_res", 60 "wrong kprobe res from probe read: %s:%u\n", 61 inet_ntoa(in->sin_addr), ntohs(in->sin_port))) 62 goto cleanup; 63 64 memset(&tmp, 0xab, sizeof(tmp)); 65 66 in = (struct sockaddr_in *)&curr; 67 if (CHECK(memcmp(&curr, &tmp, sizeof(tmp)), "check_kprobe_res", 68 "wrong kprobe res from probe write: %s:%u\n", 69 inet_ntoa(in->sin_addr), ntohs(in->sin_port))) 70 goto cleanup; 71cleanup: 72 bpf_link__destroy(kprobe_link); 73 bpf_object__close(obj); 74}