0003-remove-kernel-headers-include-musl-fix.patch
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Remove kernel header includes causing issues with musl
Include the kernel headers from netfilter causes a conflict with the
<netinet/in.h> way of defining the IPPROTO_* constants, resulting in
the following build failure:
In file included from /home/peko/autobuild/instance-0/output/host/usr/arm-buildroot-linux-musleabihf/sysroot/usr/include/netdb.h:9:0,
from /home/peko/autobuild/instance-0/output/build/norm-1.5r6/protolib/include/protoAddress.h:13,
from /home/peko/autobuild/instance-0/output/build/norm-1.5r6/protolib/include/protoDetour.h:5,
from ../protolib/src/linux/linuxDetour.cpp:3:
/home/peko/autobuild/instance-0/output/host/usr/arm-buildroot-linux-musleabihf/sysroot/usr/include/linux/in.h:28:3: error: expected identifier before numeric constant
IPPROTO_IP = 0, /* Dummy protocol for TCP */
^
/home/peko/autobuild/instance-0/output/host/usr/arm-buildroot-linux-musleabihf/sysroot/usr/include/linux/in.h:28:3: error: expected '}' before numeric constant
/home/peko/autobuild/instance-0/output/host/usr/arm-buildroot-linux-musleabihf/sysroot/usr/include/linux/in.h:28:3: error: expected unqualified-id before numeric constant
In file included from /home/peko/autobuild/instance-0/output/host/usr/arm-buildroot-linux-musleabihf/sysroot/usr/include/linux/netfilter.h:7:0,
from /home/peko/autobuild/instance-0/output/host/usr/arm-buildroot-linux-musleabihf/sysroot/usr/include/linux/netfilter_ipv4.h:8,
from ../protolib/src/linux/linuxDetour.cpp:10:
/home/peko/autobuild/instance-0/output/host/usr/arm-buildroot-linux-musleabihf/sysroot/usr/include/linux/in.h:79:1: error: expected declaration before '}' token
};
^
Since from musl's developers perspective including kernel headers is
seen as being unsafe, we simply duplicate the necessary netfilter
definitions (there are just a few) instead of including some kernel
headers.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Index: b/protolib/src/linux/linuxDetour.cpp
===================================================================
--- a/protolib/src/linux/linuxDetour.cpp
+++ b/protolib/src/linux/linuxDetour.cpp
@@ -7,15 +7,18 @@
#include <stdlib.h> // for atoi(), getenv()
#include <stdio.h>
#include <unistd.h> // for close()
-#include <linux/netfilter_ipv4.h> // for NF_IP_LOCAL_OUT, etc
-#include <linux/netfilter_ipv6.h> // for NF_IP6_LOCAL_OUT, etc
-#include <linux/netfilter.h> // for NF_ACCEPT, etc
#include <libnetfilter_queue/libnetfilter_queue.h>
#include <fcntl.h> // for fcntl(), etc
#include <linux/if_ether.h> // for ETH_P_IP
#include <net/if_arp.h> // for ARPHRD_ETHER
+/* From netfilter kernel headers */
+#define NF_IP_LOCAL_OUT 3
+
+#define NF_DROP 0
+#define NF_ACCEPT 1
+
/** NOTES:
*
* 1) This newer implementation of LinuxDetour uses netfilter_queue