From 4ab823eb500a8a63061eb23581e73ff9d8bffce1 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Sun, 6 Apr 2014 12:31:51 +0200
Subject: Set IP_FREEBIND

---
 cmake/config.cmake    | 1 +
 src/fastd_config.h.in | 1 +
 src/socket.c          | 5 +++++
 3 files changed, 7 insertions(+)

diff --git a/cmake/config.cmake b/cmake/config.cmake
index e7e0f42..cbdc775 100644
--- a/cmake/config.cmake
+++ b/cmake/config.cmake
@@ -6,6 +6,7 @@ endif()
 
 
 set(USE_BINDTODEVICE ${LINUX})
+set(USE_FREEBIND ${LINUX})
 set(USE_PMTU ${LINUX})
 set(USE_PKTINFO ${LINUX})
 set(USE_PACKET_MARK ${LINUX})
diff --git a/src/fastd_config.h.in b/src/fastd_config.h.in
index 4402139..7426baf 100644
--- a/src/fastd_config.h.in
+++ b/src/fastd_config.h.in
@@ -33,6 +33,7 @@
 
 
 #cmakedefine USE_BINDTODEVICE
+#cmakedefine USE_FREEBIND
 #cmakedefine USE_PMTU
 #cmakedefine USE_PKTINFO
 #cmakedefine USE_PACKET_MARK
diff --git a/src/socket.c b/src/socket.c
index 526e63f..4f5ac0f 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -69,6 +69,11 @@ static int bind_socket(fastd_context_t *ctx, const fastd_bind_address_t *addr, b
 	}
 #endif
 
+#ifdef USE_FREEBIND
+	if (setsockopt(fd, IPPROTO_IP, IP_FREEBIND, &one, sizeof(one)))
+		pr_warn_errno(ctx, "setsockopt: unable to set IP_FREEBIND");
+#endif
+
 	if (af == AF_INET6) {
 		if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one))) {
 			pr_error_errno(ctx, "setsockopt: unable to set IPV6_RECVPKTINFO");
-- 
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