diff options
| author | Geliang Tang <tanggeliang@kylinos.cn> | 2024-07-09 17:16:17 +0800 |
|---|---|---|
| committer | Martin KaFai Lau <martin.lau@kernel.org> | 2024-07-10 11:56:22 -0700 |
| commit | a3016a27cea8e6d10b200b9e19c19961c402d106 (patch) | |
| tree | 99c9cd6f12b6c9090379c6872f2930b108617f4e /tools/testing/selftests/bpf/network_helpers.c | |
| parent | eeb23b54e447ea62b247d89681f0140abab00d7f (diff) | |
selftests/bpf: Add backlog for network_helper_opts
Some callers expect __start_server() helper to pass their own "backlog"
value to listen() instead of the default of 1. So this patch adds struct
member "backlog" for network_helper_opts to allow callers to set "backlog"
value via start_server_str() helper.
listen(fd, 0 /* backlog */) can be used to enforce syncookie. Meaning
backlog 0 is a legit value.
Using 0 as a default and changing it to 1 here is fine. It makes the test
program easier to write for the common case. Enforcing syncookie mode by
using backlog 0 is a niche use case but it should at least have a way for
the caller to do that. Thus, -ve backlog value is used here for the
syncookie use case. Please see the comment in network_helpers.h for
the details.
Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn>
Link: https://lore.kernel.org/r/1660229659b66eaad07aa2126e9c9fe217eba0dd.1720515893.git.tanggeliang@kylinos.cn
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/network_helpers.c')
| -rw-r--r-- | tools/testing/selftests/bpf/network_helpers.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c index 44c2c8fa542a..e0cba4178e41 100644 --- a/tools/testing/selftests/bpf/network_helpers.c +++ b/tools/testing/selftests/bpf/network_helpers.c @@ -106,7 +106,7 @@ static int __start_server(int type, const struct sockaddr *addr, socklen_t addrl } if (type == SOCK_STREAM) { - if (listen(fd, 1) < 0) { + if (listen(fd, opts->backlog ? MAX(opts->backlog, 0) : 1) < 0) { log_err("Failed to listed on socket"); goto error_close; } |