tests: provide initial tests for gnrc_ipv6_ext_frag

tests/gnrc_ipv6_ext_frag/Makefile

@@ -0,0 +1,62 @@
+DEVELHELP := 1
+# name of your application
+include ../Makefile.tests_common
+
+BOARD_INSUFFICIENT_MEMORY := arduino-duemilanove arduino-leonardo \
+                             arduino-mega2560 arduino-nano \
+                             arduino-uno hifive1 i-nucleo-lrwan1 mega-xplained \
+                             msb-430 msb-430h nucleo-f030r8 nucleo-f031k6 \
+                             nucleo-f042k6 nucleo-f070rb nucleo-f072rb \
+                             nucleo-f303k8 nucleo-f334r8 nucleo-l031k6 \
+                             nucleo-l053r8 saml10-xpro saml11-xpro \
+                             stm32f0discovery telosb thingy52 waspmote-pro \
+                             wsn430-v1_3b wsn430-v1_4 z1
+# chronos, hamilton, mips-malta, and ruuvitag boards don't support ethos
+BOARD_BLACKLIST := chronos hamilton mips-malta ruuvitag
+
+export TAP ?= tap0
+
+CFLAGS += -DOUTPUT=TEXT
+CFLAGS += -DTEST_SUITES="gnrc_ipv6_ext_frag"
+CFLAGS += -DGNRC_IPV6_EXT_FRAG_LIMITS_POOL_SIZE=3
+
+# use Ethernet as link-layer protocol
+ifeq (native,$(BOARD))
+  USEMODULE += netdev_tap
+
+  TERMFLAGS ?= $(TAP)
+else
+  USEMODULE += ethos
+
+  ETHOS_BAUDRATE ?= 115200
+  CFLAGS += -DETHOS_BAUDRATE=$(ETHOS_BAUDRATE) -DUSE_ETHOS_FOR_STDIO
+  TERMDEPS += ethos
+  TERMPROG ?= sudo $(RIOTTOOLS)/ethos/ethos
+  TERMFLAGS ?= $(TAP) $(PORT) $(ETHOS_BAUDRATE)
+endif
+USEMODULE += auto_init_gnrc_netif
+# Specify the mandatory networking modules for IPv6
+USEMODULE += gnrc_ipv6_router_default
+USEMODULE += gnrc_icmpv6_error
+USEMODULE += gnrc_pktdump
+USEMODULE += gnrc_pktbuf_cmd
+# IPv6 extension headers
+USEMODULE += gnrc_ipv6_ext_frag
+# UDP support for payload
+USEMODULE += gnrc_udp
+USEMODULE += od
+# Add unittest framework
+USEMODULE += embunit
+# Add also the shell, some shell commands
+USEMODULE += shell
+USEMODULE += shell_commands
+USEMODULE += ps
+
+# TEST_ON_CI_WHITELIST += all
+
+.PHONY: ethos
+
+ethos:
+	$(Q)env -u CC -u CFLAGS make -C $(RIOTTOOLS)/ethos
+
+include $(RIOTBASE)/Makefile.include

tests/gnrc_ipv6_ext_frag/README.md

@@ -0,0 +1,36 @@
+# `gnrc_ipv6_ext_frag` test
+
+This test utilizes [scapy] to test the IPv6 Extension header parsing.
+
+It is intended to just test the fragmentation header handling and generation.
+For other extension header types please provide a separate test application.
+
+To test, compile and flash the application to any board of your liking (since
+`ethos` is used to communicate with non-native boards it really doesn't matter
+as long as the application fits).
+
+```
+make flash
+```
+
+And run the tests using
+
+```
+sudo make test
+```
+
+Note that root privileges are required since `scapy` needs to construct Ethernet
+frames to properly communicate over the TAP interface.
+
+The tests succeeds if you see the string `SUCCESS`.
+
+If any problems are encountered (i.e. if the test prints the sting `FAILED`),
+set the echo parameter in the `run()` function at the bottom of the test script
+(tests/01-run.py) to `True`. The test script will then offer a more detailed
+output.
+
+It might be that due to `scapy`'s sniffer not picking up an expected packet
+sometimes that the test application hangs for a while and then issues `FAILED`.
+Just restart the test in that case.
+
+[scapy]: https://scapy.readthedocs.io/en/latest/