diff --git a/dev/coccinelle/strcmp.cocci b/dev/coccinelle/strcmp.cocci
new file mode 100644
index 000000000..f6064bffb
--- /dev/null
+++ b/dev/coccinelle/strcmp.cocci
@@ -0,0 +1,309 @@
+@@
+statement S;
+expression E;
+expression F;
+@@
+    
+  if (
+(
+dns_hostname_cmp
+|
+eb_memcmp
+|
+memcmp
+|
+strcasecmp
+|
+strcmp
+|
+strncasecmp
+|
+strncmp
+)
+-  (E, F)
++  (E, F) != 0
+  )
+(
+  S
+|
+  { ... }
+)
+    
+@@
+statement S;
+expression E;
+expression F;
+@@
+    
+  if (
+- !
+(
+dns_hostname_cmp
+|
+eb_memcmp
+|
+memcmp
+|
+strcasecmp
+|
+strcmp
+|
+strncasecmp
+|
+strncmp
+)
+-  (E, F)
++  (E, F) == 0
+  )
+(
+  S
+|
+  { ... }
+)
+    
+@@
+expression E;
+expression F;
+expression G;
+@@
+    
+(
+G &&
+(
+dns_hostname_cmp
+|
+eb_memcmp
+|
+memcmp
+|
+strcasecmp
+|
+strcmp
+|
+strncasecmp
+|
+strncmp
+)
+-  (E, F)
++  (E, F) != 0
+)
+    
+@@
+expression E;
+expression F;
+expression G;
+@@
+    
+(
+G ||
+(
+dns_hostname_cmp
+|
+eb_memcmp
+|
+memcmp
+|
+strcasecmp
+|
+strcmp
+|
+strncasecmp
+|
+strncmp
+)
+-  (E, F)
++  (E, F) != 0
+)
+    
+@@
+expression E;
+expression F;
+expression G;
+@@
+    
+(
+(
+dns_hostname_cmp
+|
+eb_memcmp
+|
+memcmp
+|
+strcasecmp
+|
+strcmp
+|
+strncasecmp
+|
+strncmp
+)
+-  (E, F)
++  (E, F) != 0
+&& G
+)
+    
+@@
+expression E;
+expression F;
+expression G;
+@@
+    
+(
+(
+dns_hostname_cmp
+|
+eb_memcmp
+|
+memcmp
+|
+strcasecmp
+|
+strcmp
+|
+strncasecmp
+|
+strncmp
+)
+-  (E, F)
++  (E, F) != 0
+|| G
+)
+    
+@@
+expression E;
+expression F;
+expression G;
+@@
+    
+(
+G &&
+- !
+(
+dns_hostname_cmp
+|
+eb_memcmp
+|
+memcmp
+|
+strcasecmp
+|
+strcmp
+|
+strncasecmp
+|
+strncmp
+)
+-  (E, F)
++  (E, F) == 0
+)
+    
+@@
+expression E;
+expression F;
+expression G;
+@@
+    
+(
+G ||
+- !
+(
+dns_hostname_cmp
+|
+eb_memcmp
+|
+memcmp
+|
+strcasecmp
+|
+strcmp
+|
+strncasecmp
+|
+strncmp
+)
+-  (E, F)
++  (E, F) == 0
+)
+    
+@@
+expression E;
+expression F;
+expression G;
+@@
+    
+(
+- !
+(
+dns_hostname_cmp
+|
+eb_memcmp
+|
+memcmp
+|
+strcasecmp
+|
+strcmp
+|
+strncasecmp
+|
+strncmp
+)
+-  (E, F)
++  (E, F) == 0
+&& G
+)
+    
+@@
+expression E;
+expression F;
+expression G;
+@@
+    
+(
+- !
+(
+dns_hostname_cmp
+|
+eb_memcmp
+|
+memcmp
+|
+strcasecmp
+|
+strcmp
+|
+strncasecmp
+|
+strncmp
+)
+-  (E, F)
++  (E, F) == 0
+|| G
+)
+    
+@@
+expression E;
+expression F;
+expression G;
+@@
+    
+(
+- !
+(
+dns_hostname_cmp
+|
+eb_memcmp
+|
+memcmp
+|
+strcasecmp
+|
+strcmp
+|
+strncasecmp
+|
+strncmp
+)
+-  (E, F)
++  (E, F) == 0
+)