From 5b8a5c08ce28639e788734b2528faad70baa113c Mon Sep 17 00:00:00 2001 From: Sergey Kandaurov Date: Mon, 26 May 2025 16:11:36 +0400 Subject: Core: added support for TCP keepalive parameters on macOS. The support first appeared in OS X Mavericks 10.9 and documented since OS X Yosemite 10.10. It has a subtle implementation difference from other operating systems in that the TCP_KEEPALIVE socket option (used in place of TCP_KEEPIDLE) isn't inherited from a listening socket to an accepted socket. An apparent reason for this behaviour is that it might be preserved for the sake of backward compatibility. The TCP_KEEPALIVE socket option is not inherited since appearance in OS X Panther 10.3, which long predates two other TCP_KEEPINTVL and TCP_KEEPCNT socket options. Thanks to Andy Pan for initial work. --- src/event/ngx_event_accept.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'src/event') diff --git a/src/event/ngx_event_accept.c b/src/event/ngx_event_accept.c index 27038799d..033d7e021 100644 --- a/src/event/ngx_event_accept.c +++ b/src/event/ngx_event_accept.c @@ -203,6 +203,23 @@ ngx_event_accept(ngx_event_t *ev) } } +#if (NGX_HAVE_KEEPALIVE_TUNABLE && NGX_DARWIN) + + /* Darwin doesn't inherit TCP_KEEPALIVE from a listening socket */ + + if (ls->keepidle) { + if (setsockopt(s, IPPROTO_TCP, TCP_KEEPALIVE, + (const void *) &ls->keepidle, sizeof(int)) + == -1) + { + ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_socket_errno, + "setsockopt(TCP_KEEPALIVE, %d) failed, ignored", + ls->keepidle); + } + } + +#endif + *log = ls->log; c->recv = ngx_recv; -- cgit