test/net: Quick sample explaining/testing the new net_pkt buffer API

This goes through basic allocation, atomic read/write, data
getter/setter and cloning/copying.

Signed-off-by: Tomasz Bursztyka <[email protected]>

Author: Tomasz Bursztyka

tests/net/net_pkt_new/CMakeLists.txt

@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.13.1)
+include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
+project(NONE)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})

tests/net/net_pkt_new/prj.conf

@@ -0,0 +1,14 @@
+CONFIG_NET_TEST=y
+CONFIG_ZTEST=y
+
+CONFIG_NETWORKING=y
+CONFIG_NET_L2_ETHERNET=y
+CONFIG_NET_IPV4=y
+CONFIG_NET_IPV6=n
+CONFIG_NET_ARP=y
+CONFIG_NET_UDP=y
+CONFIG_NET_BUF_LOG=y
+CONFIG_NET_LOG=y
+
+CONFIG_ENTROPY_GENERATOR=y
+CONFIG_TEST_RANDOM_GENERATOR=y