Merge pull request #5229 from OlegHahm/pktbuf_minimal_check

netdev ethernet: deal with too small packet buffer

cpu/native/include/cpu_conf.h

@@ -55,6 +55,11 @@ extern "C" {
  */
 #define NATIVE_ETH_PROTO 0x1234
 
+#if (defined(GNRC_PKTBUF_SIZE)) && (GNRC_PKTBUF_SIZE < 2048)
+#   undef  GNRC_PKTBUF_SIZE
+#   define GNRC_PKTBUF_SIZE     (2048)
+#endif
+
 #ifdef __cplusplus
 }
 #endif

examples/gnrc_minimal/Makefile

@@ -21,15 +21,7 @@ USEMODULE += gnrc_icmpv6_echo
 # Use minimal standard PRNG
 USEMODULE += prng_minstd
 
-CFLAGS += -DGNRC_IPV6_NETIF_ADDR_NUMOF=4
-# Reduce sizes for GNRC's packet buffer and neighbor cache
-# (for native we need a bigger buffer, because the tap driver temporarily
-# allocates ~1500 bytes)
-ifneq (,$(filter native,$(BOARD)))
-    CFLAGS += -DGNRC_PKTBUF_SIZE=2048 -DGNRC_IPV6_NC_SIZE=1
-else
-    CFLAGS += -DGNRC_PKTBUF_SIZE=512 -DGNRC_IPV6_NC_SIZE=0
-endif
+CFLAGS += -DGNRC_PKTBUF_SIZE=512 -DGNRC_IPV6_NETIF_ADDR_NUMOF=4 -DGNRC_IPV6_NC_SIZE=1
 
 # Change this to 0 show compiler invocation lines by default:
 QUIET ?= 1