Fix compilationg errors for some kernels

Kbuild

@@ -1,3 +1,3 @@
 obj-m := kyoutubeUnblock.o
 kyoutubeUnblock-objs := kytunblock.o mangle.o quic.o utils.o kmod_utils.o
-ccflags-y := -std=gnu11 -DKERNEL_SPACE -Wno-error
+ccflags-y := -std=gnu11 -DKERNEL_SPACE -Wno-error -Wno-declaration-after-statement

kytunblock.c

@@ -9,7 +9,6 @@
 #include <linux/mutex.h>
 #include <linux/socket.h>
 #include <linux/net.h>
-#include <linux/version.h>
 
 #include <linux/netfilter.h>
 #include <linux/netfilter_ipv4.h>

types.h

@@ -32,6 +32,7 @@ typedef __u64 	uint64_t;
 #include <linux/ip.h> // IWYU pragma: export
 #include <linux/ipv6.h> // IWYU pragma: export
 #include <linux/tcp.h> // IWYU pragma: export
+#include <linux/version.h>
 
 #define ip6_hdr ipv6hdr
 

utils.c

@@ -7,6 +7,13 @@
 #include <libnetfilter_queue/libnetfilter_queue_ipv4.h>
 #include <libnetfilter_queue/libnetfilter_queue_ipv6.h>
 #include <libnetfilter_queue/libnetfilter_queue_tcp.h>
+#else
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24))
+	#include <net/ip6_checksum.h>
+	#include <net/checksum.h>
+#else
+	#include <net/checksum.h>
+#endif
 #endif