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std.net.listen: no REUSEPORT with unix socket

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On Linux, set REUSEPORT option on an unix socket returns a EOPNOTSUPP error.
See 5b0af621c3
This commit is contained in:
Pierre Tachoire 2025-01-23 16:38:05 +01:00 committed by Alex Rønne Petersen
parent df1cd62720
commit df9fdb1861
2 changed files with 16 additions and 1 deletions
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2
lib/std/net.zig
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@ -248,7 +248,7 @@ pub const Address = extern union {
posix.SO.REUSEADDR,
&mem.toBytes(@as(c_int, 1)),
);
if (@hasDecl(posix.SO, "REUSEPORT")) {
if (@hasDecl(posix.SO, "REUSEPORT") and address.any.family != posix.AF.UNIX) {
try posix.setsockopt(
sockfd,
posix.SOL.SOCKET,

15
lib/std/net/test.zig
View File

@ -296,6 +296,21 @@ test "listen on a unix socket, send bytes, receive bytes" {
try testing.expectEqualSlices(u8, "Hello world!", buf[0..n]);
}
test "listen on a unix socket with reuse_port option" {
if (!net.has_unix_sockets) return error.SkipZigTest;
// Windows doesn't implement reuse port option.
if (builtin.os.tag == .windows) return error.SkipZigTest;
const socket_path = try generateFileName("socket.unix");
defer testing.allocator.free(socket_path);
const socket_addr = try net.Address.initUnix(socket_path);
defer std.fs.cwd().deleteFile(socket_path) catch {};
var server = try socket_addr.listen(.{ .reuse_port = true });
server.deinit();
}
fn generateFileName(base_name: []const u8) ![]const u8 {
const random_bytes_count = 12;
const sub_path_len = comptime std.fs.base64_encoder.calcSize(random_bytes_count);