VDP name defaults to the VCL object name.

README.rst

@@ -56,8 +56,8 @@ XXX ...
 
 .. _pipe.vdp():
 
-new xvdp = pipe.vdp(STRING name, STRING path)
----------------------------------------------
+new xvdp = pipe.vdp(STRING name=0, STRING path)
+-----------------------------------------------
 
 XXX ...
 

src/tests/vdp.vtc

@@ -45,7 +45,7 @@ varnish v1 -vcl+backend {
 	import ${vmod_pipe};
 
 	sub vcl_init {
-		new cat = pipe.vdp(name="cat", path="${cat}");
+		new cat = pipe.vdp(path="${cat}");
 	}
 
 	sub vcl_backend_response {

src/vdfp_pipe.c

@@ -511,10 +511,8 @@ vmod_vdp__init(VRT_CTX, struct VPFX(pipe_vdp) **vdpp, const char *obj_name,
 	AZ(*vdpp);
 	AN(obj_name);
 
-	if (vdp_name == NULL || *vdp_name == '\0') {
-		VDPFAIL(ctx, "new %s: filter name is empty", obj_name);
-		return;
-	}
+	if (vdp_name == NULL || *vdp_name == '\0')
+		vdp_name = strdup(obj_name);
 
 #define CHK_NAME(nm) do {						\
 		if (strcmp(vdp_name, (nm)) == 0) {			\

src/vdfp_pipe.vcc

@@ -50,7 +50,7 @@ external commands.
 
 XXX ...
 
-$Object vdp(STRING name, STRING path)
+$Object vdp(STRING name=0, STRING path)
 
 XXX ...