net: Add unit tests for ICMPv6 handler

Change-Id: Ibdbe82ed56f110e2e0c6443700863632ee1ef56b
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>

tests/net/icmpv6/Makefile

@@ -0,0 +1,6 @@
+BOARD ?= qemu_x86
+MDEF_FILE = prj.mdef
+KERNEL_TYPE ?= nano
+CONF_FILE = prj_$(ARCH).conf
+
+include $(ZEPHYR_BASE)/Makefile.inc

tests/net/icmpv6/prj.mdef

@@ -0,0 +1,5 @@
+% Application       : ICMPv6 test
+
+% TASK NAME         PRIO ENTRY           STACK GROUPS
+% ===================================================
+  TASK MAIN            7 main            2048 [EXE]

tests/net/icmpv6/prj_x86.conf

@@ -0,0 +1,11 @@
+CONFIG_NETWORKING=y
+CONFIG_NET_IPV6=y
+CONFIG_NET_IPV4=y
+CONFIG_NET_YAIP=y
+CONFIG_NET_BUF=y
+CONFIG_MAIN_STACK_SIZE=2048
+CONFIG_NET_NBUF_RX_COUNT=2
+CONFIG_NET_NBUF_TX_COUNT=2
+CONFIG_NET_NBUF_DATA_COUNT=5
+CONFIG_NET_LOG=y
+CONFIG_SYS_LOG_SHOW_COLOR=y

tests/net/icmpv6/src/Makefile

@@ -0,0 +1,3 @@
+obj-y = main.o
+
+ccflags-y += -I${srctree}/net/yaip

tests/net/icmpv6/src/main.c

@@ -0,0 +1,123 @@
+/* main.c - Application main entry point */
+
+/*
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <string.h>
+#include <misc/printk.h>
+
+#include <net/buf.h>
+
+#include "icmpv6.h"
+
+static int handler_called;
+
+struct header {
+	int status;
+};
+
+#define buf_status(buf) (((struct header *)net_buf_user_data((buf)))->status)
+
+#define TEST_MSG "foobar devnull"
+
+static struct nano_fifo bufs_fifo;
+static struct nano_fifo data_fifo;
+
+static NET_BUF_POOL(bufs_pool, 2, 0, &bufs_fifo, NULL, sizeof(struct header));
+static NET_BUF_POOL(data_pool, 2, 128, &data_fifo, NULL, 0);
+
+static enum net_verdict handle_test_msg(struct net_buf *buf)
+{
+	struct net_buf *last = net_buf_frag_last(buf);
+
+	if (last->len != (strlen(TEST_MSG) + 1)) {
+		buf_status(buf) = -EINVAL;
+	} else {
+		buf_status(buf) = 0;
+	}
+
+	handler_called++;
+
+	return 0;
+}
+
+static struct net_icmpv6_handler test_handler1 = {
+	.type = NET_ICMPV6_ECHO_REPLY,
+	.code = 0,
+	.handler = handle_test_msg,
+};
+
+static struct net_icmpv6_handler test_handler2 = {
+	.type = NET_ICMPV6_ECHO_REQUEST,
+	.code = 0,
+	.handler = handle_test_msg,
+};
+
+void main(void)
+{
+	struct net_buf *buf, *frag;
+	int ret;
+
+	net_buf_pool_init(bufs_pool);
+	net_buf_pool_init(data_pool);
+
+	net_icmpv6_register_handler(&test_handler1);
+	net_icmpv6_register_handler(&test_handler2);
+
+	buf = net_buf_get(&bufs_fifo, 0);
+	frag = net_buf_get(&data_fifo, 0);
+
+	net_buf_frag_add(buf, frag);
+
+	memcpy(net_buf_add(frag, sizeof(TEST_MSG)),
+	       TEST_MSG, sizeof(TEST_MSG));
+
+	ret = net_icmpv6_input(buf, net_buf_frags_len(buf->frags), 0, 0);
+	if (!ret) {
+		printk("%d: Callback not called properly\n", __LINE__);
+		return;
+	}
+
+	ret = net_icmpv6_input(buf, net_buf_frags_len(buf->frags),
+			       NET_ICMPV6_ECHO_REPLY, 0);
+	if (ret < 0 || buf_status(buf) != 0) {
+		printk("%d: Callback not called properly\n", __LINE__);
+		return;
+	}
+
+	ret = net_icmpv6_input(buf, net_buf_frags_len(buf->frags), 1, 0);
+	if (!ret) {
+		printk("%d: Callback not called properly\n", __LINE__);
+		return;
+	}
+
+	ret = net_icmpv6_input(buf, net_buf_frags_len(buf->frags),
+			       NET_ICMPV6_ECHO_REQUEST, 0);
+	if (ret < 0 || buf_status(buf) != 0) {
+		printk("%d: Callback not called properly\n", __LINE__);
+		return;
+	}
+
+	if (handler_called != 2) {
+		printk("%d: Callbacks not called properly\n", __LINE__);
+		return;
+	}
+
+	printk("ICMPv6 tests passed\n");
+}