add support for disabling VXLAN/eBPF support

This makes it easier to backport or de-bloat on smaller systems

Signed-off-by: Felix Fietkau <nbd@nbd.name>

CMakeLists.txt

@@ -14,18 +14,26 @@ ADD_DEFINITIONS(-Os -Wall -Werror --std=gnu99 -g3 -Wmissing-declarations -DRUNST
 FIND_LIBRARY(libjson NAMES json-c json)
 
 OPTION(UBUS_SUPPORT "enable ubus support" ON)
+OPTION(VXLAN_SUPPORT "enable VXLAN support" ON)
 IF(CMAKE_SYSTEM_NAME STREQUAL "Linux")
 	FIND_LIBRARY(nl nl-tiny)
+	SET(SOURCES ${SOURCES} wg-linux.c)
+ELSE()
+	SET(nl "")
+	SET(VXLAN_SUPPORT OFF)
+ENDIF()
+IF(VXLAN_SUPPORT)
 	find_library(bpf NAMES bpf)
 	find_library(elf NAMES elf)
 	find_library(zlib NAMES z)
-	SET(SOURCES ${SOURCES} wg-linux.c vxlan.c bpf.c rtnl.c)
+	SET(SOURCES ${SOURCES} bpf.c vxlan.c rtnl.c)
+	ADD_DEFINITIONS(-DVXLAN_SUPPORT)
 ELSE()
-	SET(nl "")
 	SET(bpf "")
 	SET(elf "")
 	SET(zlib "")
 ENDIF()
+
 IF(UBUS_SUPPORT)
   SET(SOURCES ${SOURCES} ubus.c)
   ADD_DEFINITIONS(-DUBUS_SUPPORT=1)

service.c

@@ -126,7 +126,7 @@ service_add(struct network *net, struct blob_attr *data)
 		s->type = strcpy(type_buf, type);
 	if (config)
 		s->config = memcpy(config_buf, config, blob_pad_len(config));
-#ifdef linux
+#ifdef VXLAN_SUPPORT
 	if (type && !strcmp(type, "vxlan"))
 		s->ops = &vxlan_ops;
 #endif