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-rw-r--r--src/compat/compat.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/compat/compat.h b/src/compat/compat.h
index c182234..58d16b1 100644
--- a/src/compat/compat.h
+++ b/src/compat/compat.h
@@ -698,6 +698,34 @@ static inline void cpu_to_le32_array(u32 *buf, unsigned int words)
}
#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 0)
+#include <crypto/algapi.h>
+static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2,
+ unsigned int size)
+{
+ if (IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
+ __builtin_constant_p(size) &&
+ (size % sizeof(unsigned long)) == 0) {
+ unsigned long *d = (unsigned long *)dst;
+ unsigned long *s1 = (unsigned long *)src1;
+ unsigned long *s2 = (unsigned long *)src2;
+
+ while (size > 0) {
+ *d++ = *s1++ ^ *s2++;
+ size -= sizeof(unsigned long);
+ }
+ } else {
+ if (unlikely(dst != src1))
+ memmove(dst, src1, size);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 0)
+ crypto_xor(dst, src2, size);
+#else
+ __crypto_xor(dst, src2, size);
+#endif
+ }
+}
+#endif
+
/* https://lkml.kernel.org/r/20170624021727.17835-1-Jason@zx2c4.com */
#if IS_ENABLED(CONFIG_NF_CONNTRACK)
#include <linux/ip.h>