diff options
Diffstat (limited to 'tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c')
-rw-r--r-- | tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c | 61 |
1 files changed, 53 insertions, 8 deletions
diff --git a/tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c b/tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c index 87829c86c746..b9e991d43155 100644 --- a/tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c +++ b/tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c @@ -2,6 +2,7 @@ // Copyright (c) 2018 Facebook // Copyright (c) 2019 Cloudflare +#include <limits.h> #include <string.h> #include <stdlib.h> #include <unistd.h> @@ -77,7 +78,7 @@ out: return fd; } -static int get_map_fd_by_prog_id(int prog_id) +static int get_map_fd_by_prog_id(int prog_id, bool *xdp) { struct bpf_prog_info info = {}; __u32 info_len = sizeof(info); @@ -104,6 +105,8 @@ static int get_map_fd_by_prog_id(int prog_id) goto err; } + *xdp = info.type == BPF_PROG_TYPE_XDP; + map_fd = bpf_map_get_fd_by_id(map_ids[0]); if (map_fd < 0) log_err("Failed to get fd by map id %d", map_ids[0]); @@ -113,18 +116,32 @@ err: return map_fd; } -static int run_test(int server_fd, int results_fd) +static int run_test(int server_fd, int results_fd, bool xdp) { int client = -1, srv_client = -1; int ret = 0; __u32 key = 0; - __u64 value = 0; + __u32 key_gen = 1; + __u32 key_mss = 2; + __u32 value = 0; + __u32 value_gen = 0; + __u32 value_mss = 0; if (bpf_map_update_elem(results_fd, &key, &value, 0) < 0) { log_err("Can't clear results"); goto err; } + if (bpf_map_update_elem(results_fd, &key_gen, &value_gen, 0) < 0) { + log_err("Can't clear results"); + goto err; + } + + if (bpf_map_update_elem(results_fd, &key_mss, &value_mss, 0) < 0) { + log_err("Can't clear results"); + goto err; + } + client = connect_to_server(server_fd); if (client == -1) goto err; @@ -140,8 +157,35 @@ static int run_test(int server_fd, int results_fd) goto err; } - if (value != 1) { - log_err("Didn't match syncookie: %llu", value); + if (value == 0) { + log_err("Didn't match syncookie: %u", value); + goto err; + } + + if (bpf_map_lookup_elem(results_fd, &key_gen, &value_gen) < 0) { + log_err("Can't lookup result"); + goto err; + } + + if (xdp && value_gen == 0) { + // SYN packets do not get passed through generic XDP, skip the + // rest of the test. + printf("Skipping XDP cookie check\n"); + goto out; + } + + if (bpf_map_lookup_elem(results_fd, &key_mss, &value_mss) < 0) { + log_err("Can't lookup result"); + goto err; + } + + if (value != value_gen) { + log_err("BPF generated cookie does not match kernel one"); + goto err; + } + + if (value_mss < 536 || value_mss > USHRT_MAX) { + log_err("Unexpected MSS retrieved"); goto err; } @@ -163,13 +207,14 @@ int main(int argc, char **argv) int server_v6 = -1; int results = -1; int err = 0; + bool xdp; if (argc < 2) { fprintf(stderr, "Usage: %s prog_id\n", argv[0]); exit(1); } - results = get_map_fd_by_prog_id(atoi(argv[1])); + results = get_map_fd_by_prog_id(atoi(argv[1]), &xdp); if (results < 0) { log_err("Can't get map"); goto err; @@ -194,10 +239,10 @@ int main(int argc, char **argv) if (server_v6 == -1) goto err; - if (run_test(server, results)) + if (run_test(server, results, xdp)) goto err; - if (run_test(server_v6, results)) + if (run_test(server_v6, results, xdp)) goto err; printf("ok\n"); |