[OE-core] [dora][PATCH] avahi: handle SO_REUSEPORT not being available

[Ross Burton]

Linux < 3.9 doesn't have the SO_REUSEPORT option so instead of failing to start
when built with >=3.9 kernel headers but booted on <3.9 kernels, continue as if
SO_REUSEPORT wasn't available.

(From OE-Core rev: 85e89da55f778ad3713460cb0df1435d82e94510)

Signed-off-by: Ross Burton <ross.burton at intel.com>
Signed-off-by: Saul Wold <sgw at linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 meta/recipes-connectivity/avahi/avahi.inc          |    1 +
 .../avahi/files/reuseport-check.patch              |   30 ++++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 meta/recipes-connectivity/avahi/files/reuseport-check.patch

diff --git a/meta/recipes-connectivity/avahi/avahi.inc b/meta/recipes-connectivity/avahi/avahi.inc
index cf063db..02dd5ed 100644
--- a/meta/recipes-connectivity/avahi/avahi.inc
+++ b/meta/recipes-connectivity/avahi/avahi.inc
@@ -25,6 +25,7 @@ SRC_URI = "http://avahi.org/download/avahi-${PV}.tar.gz \
           file://avahi_fix_install_issue.patch \
           file://fix_for_automake_1.12.x.patch \
           file://out-of-tree.patch \
+          file://reuseport-check.patch \
           "
 
 USERADD_PACKAGES = "avahi-daemon avahi-autoipd"
diff --git a/meta/recipes-connectivity/avahi/files/reuseport-check.patch b/meta/recipes-connectivity/avahi/files/reuseport-check.patch
new file mode 100644
index 0000000..bb81c2c
--- /dev/null
+++ b/meta/recipes-connectivity/avahi/files/reuseport-check.patch
@@ -0,0 +1,30 @@
+Fix avahi-daemon when running on kernel < 3.9 (patch taken from Ubuntu).
+
+Upstream-Status: Pending (unmaintained upstream)
+Signed-off-by: Ross Burton <ross.burton at intel.com>
+
+Description: SO_REUSEPORT may not exist in running kernel
+ When userspace defines SO_REUSEPORT we will attempt to enable socket
+ port number reuse.  However if the running kernel does not support
+ this call it will fail preventing daemon startup.  If this call is
+ present but fails ENOPROTOOPT then we know that actually the kernel
+ does not support it and we should continue as if we did not have the
+ call at all.  (LP: #1228204)
+ .
+ This patch could be removed from the debian package after jessie release.
+Author: Andy Whitcroft <apw at canonical.com>
+
+Index: avahi-0.6.31/avahi-core/socket.c
+===================================================================
+--- avahi-0.6.31.orig/avahi-core/socket.c	2013-09-20 16:36:50.000000000 +0100
++++ avahi-0.6.31/avahi-core/socket.c	2013-09-20 16:38:23.781863644 +0100
+@@ -177,7 +177,8 @@
+     yes = 1;
+     if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &yes, sizeof(yes)) < 0) {
+         avahi_log_warn("SO_REUSEPORT failed: %s", strerror(errno));
+-        return -1;
++        if (errno != ENOPROTOOPT)
++            return -1;
+     }
+ #endif
+ 
-- 
1.7.10.4