From c4b124f7edbeab50338f8a311de0be1eb044a7cf Mon Sep 17 00:00:00 2001
From: Fabian Keil <fk@fabiankeil.de>
Date: Mon, 18 Nov 2019 11:54:17 +0100
Subject: [PATCH] Use the IP_FREEBIND socket option, if defined

This allows Privoxy to bind to not-yet assigned IP addresses
which is useful in failover environments.

Patch by Sam Varshavchik.
---
 jbsockets.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/jbsockets.c b/jbsockets.c
index 625d830e..ab2228a7 100644
--- a/jbsockets.c
+++ b/jbsockets.c
@@ -1068,6 +1068,10 @@ int bind_port(const char *hostnam, int portnum, int backlog, jb_socket *pfd)
    setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&one, sizeof(one));
 #endif /* ndef _WIN32 */
 
+#ifdef IP_FREEBIND
+   setsockopt(fd, IPPROTO_IP, IP_FREEBIND, (char *)&one, sizeof(one));
+#endif
+
 #ifdef HAVE_RFC2553
    if (bind(fd, rp->ai_addr, rp->ai_addrlen) < 0)
 #else
-- 
2.39.2