From: Fabian Keil <fk@fabiankeil.de>
Date: Mon, 18 Nov 2019 10:54:17 +0000 (+0100)
Subject: Use the IP_FREEBIND socket option, if defined
X-Git-Tag: v_3_0_29~567
X-Git-Url: http://www.privoxy.org/gitweb/user-manual/quickstart.html?a=commitdiff_plain;h=c4b124f7edbeab50338f8a311de0be1eb044a7cf;p=privoxy.git

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.
---

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