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-rw-r--r--src/listensocket.cpp17
1 files changed, 17 insertions, 0 deletions
diff --git a/src/listensocket.cpp b/src/listensocket.cpp
index 466b91c8b..f875bc646 100644
--- a/src/listensocket.cpp
+++ b/src/listensocket.cpp
@@ -22,6 +22,10 @@
#include "socket.h"
#include "socketengine.h"
+#ifdef USE_TCP_DEFER_ACCEPT
+#include <netinet/tcp.h>
+#endif
+
ListenSocket::ListenSocket(ConfigTag* tag, const irc::sockets::sockaddrs& bind_to)
: bind_tag(tag)
{
@@ -38,6 +42,19 @@ ListenSocket::ListenSocket(ConfigTag* tag, const irc::sockets::sockaddrs& bind_t
if (rv >= 0)
rv = ServerInstance->SE->Listen(this->fd, ServerInstance->Config->MaxConn);
+ int timeout = tag->getInt("defer", 0);
+ if (timeout && !rv)
+ {
+#ifdef USE_TCP_DEFER_ACCEPT
+ setsockopt(fd, IPPROTO_TCP, TCP_DEFER_ACCEPT, &timeout, sizeof(timeout));
+#elif defined USE_SO_ACCEPTFILTER
+ struct accept_filter_arg afa;
+ memset(&afa, 0, sizeof(afa));
+ strcpy(afa.af_name, "dataready");
+ setsockopt(fd, SOL_SOCKET, SO_ACCEPTFILTER, &afa, sizeof(afa));
+#endif
+ }
+
#ifdef IPV6_V6ONLY
/* This OS supports IPv6 sockets that can also listen for IPv4
* connections. If our address is "*" or empty, enable both v4 and v6 to