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net: tests: Unit tests for the IPv4 ARP code

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Change-Id: I607ffdbffc7348fae70272c7add57456fcaf79af
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
Jukka Rissanen 2016-05-23 17:38:28 +03:00
commit 7eff526e3b
5 changed files with 784 additions and 0 deletions
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6
tests/net/arp/Makefile Normal file
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BOARD ?= qemu_x86
MDEF_FILE = prj.mdef
KERNEL_TYPE ?= nano
CONF_FILE = prj_$(ARCH).conf
include $(ZEPHYR_BASE)/Makefile.inc

5
tests/net/arp/prj.mdef Normal file
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% Application : Network test
% TASK NAME PRIO ENTRY STACK GROUPS
% ===================================================
TASK MAIN 7 mainloop 2048 [EXE]

15
tests/net/arp/prj_x86.conf Normal file
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CONFIG_NETWORKING=y
CONFIG_NET_IPV4=y
CONFIG_NET_YAIP=y
CONFIG_NET_BUF=y
CONFIG_MAIN_STACK_SIZE=2048
CONFIG_NET_NBUF_RX_COUNT=3
CONFIG_NET_NBUF_TX_COUNT=4
CONFIG_NET_NBUF_DATA_COUNT=7
CONFIG_NET_LOG=y
CONFIG_SYS_LOG_SHOW_COLOR=y
CONFIG_TEST_RANDOM_GENERATOR=y
CONFIG_NET_IFACE_UNICAST_IPV4_ADDR_COUNT=3
CONFIG_NETWORK_IP_STACK_DEBUG_IPV4_ARP=y
CONFIG_NETWORK_IP_STACK_DEBUG_IF=y
CONFIG_NETWORK_IP_STACK_DEBUG_CORE=y

2
tests/net/arp/src/Makefile Normal file
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obj-y = main.o
ccflags-y += -I${srctree}/net/yaip

756
tests/net/arp/src/main.c Normal file
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/* 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 <stdint.h>
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <device.h>
#include <init.h>
#include <misc/printk.h>
#include <net/net_core.h>
#include <net/nbuf.h>
#include <net/net_ip.h>
#include <net/arp.h>
#define NET_DEBUG 1
#include "net_private.h"
/* Sample ARP request (60 bytes) */
static const unsigned char pkt1[60] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x98, 0x4f, /* .......O */
0xee, 0x05, 0x4e, 0x5d, 0x08, 0x06, 0x00, 0x01, /* ..N].... */
0x08, 0x00, 0x06, 0x04, 0x00, 0x01, 0x98, 0x4f, /* .......O */
0xee, 0x05, 0x4e, 0x5d, 0xc0, 0xa8, 0x00, 0x02, /* ..N].... */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0xa8, /* ........ */
0x00, 0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* ........ */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* ........ */
0x00, 0x00, 0x00, 0x00 /* .... */
};
static char *app_data = "0123456789";
static const struct net_eth_addr broadcast_eth_addr = {
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } };
static const struct net_eth_addr multicast_eth_addr = {
{ 0x01, 0x00, 0x5e, 0x01, 0x02, 0x03 } };
struct net_arp_context {
uint8_t mac_addr[sizeof(struct net_eth_addr)];
struct net_linkaddr ll_addr;
};
int net_arp_dev_init(struct device *dev)
{
struct net_arp_context *net_arp_context = dev->driver_data;
dev->driver_api = NULL;
net_arp_context = net_arp_context;
return 0;
}
static uint8_t *net_arp_get_mac(struct device *dev)
{
struct net_arp_context *context = dev->driver_data;
if (context->mac_addr[0] == 0x00) {
/* 10-00-00-00-00 to 10-00-00-00-FF Documentation RFC7042 */
context->mac_addr[0] = 0x10;
context->mac_addr[1] = 0x00;
context->mac_addr[2] = 0x00;
context->mac_addr[3] = 0x00;
context->mac_addr[4] = 0x00;
context->mac_addr[5] = sys_rand32_get();
}
return context->mac_addr;
}
static void net_arp_iface_init(struct net_if *iface)
{
uint8_t *mac = net_arp_get_mac(net_if_get_device(iface));
net_if_set_link_addr(iface, mac, 8);
}
static uint32_t net_arp_iface_cap(struct net_if *iface)
{
return NET_CAP_ARP;
}
static struct net_buf *pending_buf;
static struct net_eth_addr hwaddr = { { 0x42, 0x11, 0x69, 0xde, 0xfa, 0xec } };
static int send_status = -EINVAL;
#define NET_ARP_BUF(buf) ((struct net_arp_hdr *)net_nbuf_ip_data(buf))
static int tester_send(struct net_if *iface, struct net_buf *buf)
{
struct net_eth_hdr *hdr;
if (!buf->frags) {
printk("No data to send!");
return -ENODATA;
}
if (net_nbuf_ll_reserve(buf) != sizeof(struct net_eth_hdr)) {
printk("No ethernet header in buf %p", buf);
send_status = -EINVAL;
return send_status;
}
hdr = (struct net_eth_hdr *)(net_nbuf_ip_data(buf) -
net_nbuf_ll_reserve(buf));
if (ntohs(hdr->type) == NET_ETH_PTYPE_ARP) {
struct net_arp_hdr *arp_hdr =
(struct net_arp_hdr *)(net_nbuf_ip_data(buf) -
net_nbuf_ll_reserve(buf));
if (ntohs(arp_hdr->opcode) == NET_ARP_REPLY) {
if (buf != pending_buf) {
printk("Pending data but to be sent is wrong, "
"expecting %p but got %p\n",
pending_buf, buf);
return -EINVAL;
}
if (memcmp(&hdr->dst, &hwaddr,
sizeof(struct net_eth_addr))) {
char out[sizeof("xx:xx:xx:xx:xx:xx")];
snprintf(out, sizeof(out),
net_sprint_ll_addr(
(uint8_t *)&hdr->dst,
sizeof(struct net_eth_addr)));
printk("Invalid hwaddr %s, should be %s\n",
out,
net_sprint_ll_addr(
(uint8_t *)&hwaddr,
sizeof(struct net_eth_addr)));
send_status = -EINVAL;
return send_status;
}
} else if (ntohs(arp_hdr->opcode) == NET_ARP_REQUEST) {
if (memcmp(&hdr->src, &hwaddr,
sizeof(struct net_eth_addr))) {
char out[sizeof("xx:xx:xx:xx:xx:xx")];
snprintf(out, sizeof(out),
net_sprint_ll_addr(
(uint8_t *)&hdr->src,
sizeof(struct net_eth_addr)));
printk("Invalid hwaddr %s, should be %s\n",
out,
net_sprint_ll_addr(
(uint8_t *)&hwaddr,
sizeof(struct net_eth_addr)));
send_status = -EINVAL;
return send_status;
}
}
}
printk("Data was sent successfully\n");
net_nbuf_unref(buf);
send_status = 0;
return 0;
}
static inline struct in_addr *if_get_addr(struct net_if *iface)
{
int i;
for (i = 0; i < NET_IF_MAX_IPV4_ADDR; i++) {
if (iface->ipv4.unicast[i].is_used &&
iface->ipv4.unicast[i].address.family == AF_INET &&
iface->ipv4.unicast[i].addr_state == NET_ADDR_PREFERRED) {
return &iface->ipv4.unicast[i].address.in_addr;
}
}
return NULL;
}
static inline struct net_buf *prepare_arp_reply(struct net_if *iface,
struct net_buf *req,
struct net_eth_addr *addr)
{
struct net_buf *buf, *frag;
struct net_arp_hdr *hdr;
buf = net_nbuf_get_reserve_tx(0);
if (!buf) {
goto fail;
}
frag = net_nbuf_get_reserve_data(sizeof(struct net_eth_hdr));
if (!frag) {
goto fail;
}
net_buf_frag_add(buf, frag);
net_nbuf_iface(buf) = iface;
net_nbuf_ll_reserve(buf) = net_buf_headroom(frag);
hdr = (struct net_arp_hdr *)(net_nbuf_ip_data(buf) -
net_buf_headroom(frag));
hdr->eth_hdr.type = htons(NET_ETH_PTYPE_ARP);
memset(&hdr->eth_hdr.dst.addr, 0xff, sizeof(struct net_eth_addr));
memcpy(&hdr->eth_hdr.src.addr, net_if_get_link_addr(iface)->addr,
sizeof(struct net_eth_addr));
hdr->hwtype = htons(NET_ARP_HTYPE_ETH);
hdr->protocol = htons(NET_ETH_PTYPE_IP);
hdr->hwlen = sizeof(struct net_eth_addr);
hdr->protolen = sizeof(struct in_addr);
hdr->opcode = htons(NET_ARP_REPLY);
memcpy(&hdr->dst_hwaddr.addr, &hdr->eth_hdr.src.addr,
sizeof(struct net_eth_addr));
memcpy(&hdr->src_hwaddr.addr, addr,
sizeof(struct net_eth_addr));
net_ipaddr_copy(&hdr->dst_ipaddr, &NET_ARP_BUF(req)->src_ipaddr);
net_ipaddr_copy(&hdr->src_ipaddr, &NET_ARP_BUF(req)->dst_ipaddr);
net_buf_add(frag, sizeof(struct net_arp_hdr) - net_buf_headroom(frag));
return buf;
fail:
net_nbuf_unref(buf);
return NULL;
}
static inline struct net_buf *prepare_arp_request(struct net_if *iface,
struct net_buf *req,
struct net_eth_addr *addr)
{
struct net_buf *buf, *frag;
struct net_arp_hdr *hdr, *req_hdr;
buf = net_nbuf_get_reserve_rx(0);
if (!buf) {
goto fail;
}
frag = net_nbuf_get_reserve_data(sizeof(struct net_eth_hdr));
if (!frag) {
goto fail;
}
net_buf_frag_add(buf, frag);
net_nbuf_iface(buf) = iface;
net_nbuf_ll_reserve(buf) = sizeof(struct net_eth_hdr);
hdr = (struct net_arp_hdr *)(net_nbuf_ip_data(buf) -
net_buf_headroom(frag));
req_hdr = (struct net_arp_hdr *)(net_nbuf_ip_data(req) -
net_nbuf_ll_reserve(req));
hdr->eth_hdr.type = htons(NET_ETH_PTYPE_ARP);
memset(&hdr->eth_hdr.dst.addr, 0xff, sizeof(struct net_eth_addr));
memcpy(&hdr->eth_hdr.src.addr, addr, sizeof(struct net_eth_addr));
hdr->hwtype = htons(NET_ARP_HTYPE_ETH);
hdr->protocol = htons(NET_ETH_PTYPE_IP);
hdr->hwlen = sizeof(struct net_eth_addr);
hdr->protolen = sizeof(struct in_addr);
hdr->opcode = htons(NET_ARP_REQUEST);
memset(&hdr->dst_hwaddr.addr, 0x00, sizeof(struct net_eth_addr));
memcpy(&hdr->src_hwaddr.addr, addr, sizeof(struct net_eth_addr));
net_ipaddr_copy(&hdr->src_ipaddr, &req_hdr->src_ipaddr);
net_ipaddr_copy(&hdr->dst_ipaddr, &req_hdr->dst_ipaddr);
net_buf_add(frag, sizeof(struct net_arp_hdr) - net_buf_headroom(frag));
return buf;
fail:
net_nbuf_unref(buf);
return NULL;
}
static void setup_eth_header(struct net_if *iface, struct net_buf *buf,
struct net_eth_addr *hwaddr, uint16_t type)
{
struct net_eth_hdr *hdr = (struct net_eth_hdr *)
(net_nbuf_ip_data(buf) - net_nbuf_ll_reserve(buf));
memcpy(&hdr->dst.addr, hwaddr, sizeof(struct net_eth_addr));
memcpy(&hdr->src.addr, net_if_get_link_addr(iface)->addr,
sizeof(struct net_eth_addr));
hdr->type = htons(type);
}
struct net_arp_context net_arp_context_data;
static struct net_if_api net_arp_if_api = {
.init = net_arp_iface_init,
.capabilities = net_arp_iface_cap,
.send = tester_send,
};
NET_DEVICE_INIT(net_arp_test, "net_arp_test",
net_arp_dev_init, &net_arp_context_data, NULL,
CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
&net_arp_if_api, 127);
#ifdef CONFIG_MICROKERNEL
void mainloop(void)
#else
void main(void)
#endif
{
struct net_buf *buf, *buf2;
struct net_buf *frag;
struct net_if *iface;
struct net_if_addr *ifaddr;
struct net_arp_hdr *arp_hdr;
struct net_ipv4_hdr *ipv4;
struct net_eth_hdr *eth_hdr;
int len;
struct in_addr dst = { { { 192, 168, 0, 2 } } };
struct in_addr dst_far = { { { 10, 11, 12, 13 } } };
struct in_addr dst_far2 = { { { 172, 16, 14, 186 } } };
struct in_addr src = { { { 192, 168, 0, 1 } } };
struct in_addr mcast = { { { 224, 1, 2, 3 } } };
struct in_addr netmask = { { { 255, 255, 255, 0 } } };
struct in_addr gw = { { { 192, 168, 0, 42 } } };
net_arp_init();
iface = net_if_get_default();
net_if_set_gw(iface, &gw);
net_if_set_netmask(iface, &netmask);
/* Broadcast and multicast tests */
buf = net_nbuf_get_reserve_tx(0);
if (!buf) {
printk("Out of mem TX xcast\n");
return;
}
frag = net_nbuf_get_reserve_data(sizeof(struct net_eth_hdr));
if (!frag) {
printk("Out of mem DATA xcast\n");
return;
}
net_buf_frag_add(buf, frag);
net_nbuf_ll_reserve(buf) = net_buf_headroom(frag);
net_nbuf_iface(buf) = iface;
ipv4 = (struct net_ipv4_hdr *)net_buf_add(frag,
sizeof(struct net_ipv4_hdr));
net_ipaddr_copy(&ipv4->src, &src);
net_ipaddr_copy(&ipv4->dst, net_ipv4_broadcast_address());
buf2 = net_arp_prepare(buf);
if (buf2 != buf) {
printk("ARP broadcast buffer different\n");
return;
}
eth_hdr = (struct net_eth_hdr *)(net_nbuf_ip_data(buf) -
net_nbuf_ll_reserve(buf));
if (memcmp(&eth_hdr->dst.addr, &broadcast_eth_addr,
sizeof(struct net_eth_addr))) {
char out[sizeof("xx:xx:xx:xx:xx:xx")];
snprintf(out, sizeof(out),
net_sprint_ll_addr((uint8_t *)&eth_hdr->dst.addr,
sizeof(struct net_eth_addr)));
printk("ETH addr dest invalid %s, should be %s", out,
net_sprint_ll_addr((uint8_t *)&broadcast_eth_addr,
sizeof(broadcast_eth_addr)));
return;
}
net_ipaddr_copy(&ipv4->dst, &mcast);
buf2 = net_arp_prepare(buf);
if (buf2 != buf) {
printk("ARP multicast buffer different\n");
return;
}
if (memcmp(&eth_hdr->dst.addr, &multicast_eth_addr,
sizeof(struct net_eth_addr))) {
char out[sizeof("xx:xx:xx:xx:xx:xx")];
snprintf(out, sizeof(out),
net_sprint_ll_addr((uint8_t *)&eth_hdr->dst.addr,
sizeof(struct net_eth_addr)));
printk("ETH maddr dest invalid %s, should be %s", out,
net_sprint_ll_addr((uint8_t *)&multicast_eth_addr,
sizeof(broadcast_eth_addr)));
return;
}
net_nbuf_unref(buf);
/* Then the unicast test */
ifaddr = net_if_ipv4_addr_add(iface,
&src,
NET_ADDR_MANUAL,
0);
ifaddr->addr_state = NET_ADDR_PREFERRED;
/* Application data for testing */
buf = net_nbuf_get_reserve_tx(0);
if (!buf) {
printk("Out of mem TX\n");
return;
}
frag = net_nbuf_get_reserve_data(sizeof(struct net_eth_hdr));
if (!frag) {
printk("Out of mem DATA\n");
return;
}
net_buf_frag_add(buf, frag);
net_nbuf_ll_reserve(buf) = net_buf_headroom(frag);
net_nbuf_iface(buf) = iface;
setup_eth_header(iface, buf, &hwaddr, NET_ETH_PTYPE_IP);
len = strlen(app_data);
if (net_nbuf_ll_reserve(buf) != sizeof(struct net_eth_hdr)) {
printk("LL reserve invalid, should be %d was %d\n",
sizeof(struct net_eth_hdr),
net_nbuf_ll_reserve(buf));
return;
}
ipv4 = (struct net_ipv4_hdr *)net_buf_add(frag,
sizeof(struct net_ipv4_hdr));
net_ipaddr_copy(&ipv4->src, &src);
net_ipaddr_copy(&ipv4->dst, &dst);
memcpy(net_buf_add(frag, len), app_data, len);
buf2 = net_arp_prepare(buf);
/* buf2 is the ARP buffer and buf is the IPv4 buffer and it was
* stored in ARP table.
*/
if (buf2 == buf) {
/* The buffers cannot be the same as the ARP cache has
* still room for the buf.
*/
printk("ARP cache should still have free space\n");
return;
}
if (!buf2) {
printk("ARP buf is empty\n");
return;
}
/* The ARP cache should now have a link to pending net_buf
* that is to be sent after we have got an ARP reply.
*/
if (!buf->frags) {
printk("Pending buf fragment is NULL\n");
return;
}
pending_buf = buf;
/* buf2 should contain the arp header, verify it */
if (memcmp(net_nbuf_ip_data(buf2), &broadcast_eth_addr,
sizeof(struct net_eth_addr))) {
printk("ARP ETH dest address invalid\n");
net_hexdump("ETH dest correct", net_nbuf_ip_data(buf2),
sizeof(struct net_eth_addr));
net_hexdump("ETH dest wrong ", (uint8_t *)&broadcast_eth_addr,
sizeof(struct net_eth_addr));
return;
}
if (memcmp(net_nbuf_ip_data(buf2) + sizeof(struct net_eth_addr),
iface->link_addr.addr,
sizeof(struct net_eth_addr))) {
printk("ARP ETH source address invalid\n");
net_hexdump("ETH src correct",
iface->link_addr.addr,
sizeof(struct net_eth_addr));
net_hexdump("ETH src wrong ",
net_nbuf_ip_data(buf2) +
sizeof(struct net_eth_addr),
sizeof(struct net_eth_addr));
return;
}
arp_hdr = (struct net_arp_hdr *)net_nbuf_ip_data(buf2);
if (arp_hdr->eth_hdr.type != htons(NET_ETH_PTYPE_ARP)) {
printk("ETH type 0x%x, should be 0x%x\n",
arp_hdr->eth_hdr.type, htons(NET_ETH_PTYPE_ARP));
return;
}
if (arp_hdr->hwtype != htons(NET_ARP_HTYPE_ETH)) {
printk("ARP hwtype 0x%x, should be 0x%x\n",
arp_hdr->hwtype, htons(NET_ARP_HTYPE_ETH));
return;
}
if (arp_hdr->protocol != htons(NET_ETH_PTYPE_IP)) {
printk("ARP protocol 0x%x, should be 0x%x\n",
arp_hdr->protocol, htons(NET_ETH_PTYPE_IP));
return;
}
if (arp_hdr->hwlen != sizeof(struct net_eth_addr)) {
printk("ARP hwlen 0x%x, should be 0x%x\n",
arp_hdr->hwlen, sizeof(struct net_eth_addr));
return;
}
if (arp_hdr->protolen != sizeof(struct in_addr)) {
printk("ARP IP addr len 0x%x, should be 0x%x\n",
arp_hdr->protolen, sizeof(struct in_addr));
return;
}
if (arp_hdr->opcode != htons(NET_ARP_REQUEST)) {
printk("ARP opcode 0x%x, should be 0x%x\n",
arp_hdr->opcode, htons(NET_ARP_REQUEST));
return;
}
if (!net_ipv4_addr_cmp(&arp_hdr->dst_ipaddr,
&NET_IPV4_BUF(buf)->dst)) {
char out[sizeof("xxx.xxx.xxx.xxx")];
snprintf(out, sizeof(out),
net_sprint_ipv4_addr(&arp_hdr->dst_ipaddr));
printk("ARP IP dest invalid %s, should be %s", out,
net_sprint_ipv4_addr(&NET_IPV4_BUF(buf)->dst));
return;
}
if (!net_ipv4_addr_cmp(&arp_hdr->src_ipaddr,
&NET_IPV4_BUF(buf)->src)) {
char out[sizeof("xxx.xxx.xxx.xxx")];
snprintf(out, sizeof(out),
net_sprint_ipv4_addr(&arp_hdr->src_ipaddr));
printk("ARP IP src invalid %s, should be %s", out,
net_sprint_ipv4_addr(&NET_IPV4_BUF(buf)->src));
return;
}
if (buf->ref != 2) {
printk("ARP cache should own the original buffer\n");
return;
}
/* Then a case where target is not in the same subnet */
net_ipaddr_copy(&ipv4->dst, &dst_far);
buf2 = net_arp_prepare(buf);
if (buf2 == buf) {
printk("ARP cache should not find anything\n");
return;
}
if (!buf2) {
printk("ARP buf2 is empty\n");
return;
}
arp_hdr = (struct net_arp_hdr *)net_nbuf_ip_data(buf2);
if (!net_ipv4_addr_cmp(&arp_hdr->dst_ipaddr, &iface->ipv4.gw)) {
char out[sizeof("xxx.xxx.xxx.xxx")];
snprintf(out, sizeof(out),
net_sprint_ipv4_addr(&arp_hdr->dst_ipaddr));
printk("ARP IP dst invalid %s, should be %s\n", out,
net_sprint_ipv4_addr(&iface->ipv4.gw));
return;
}
net_nbuf_unref(buf2);
/* Try to find the same destination again, this should fail as there
* is a pending request in ARP cache.
*/
net_ipaddr_copy(&ipv4->dst, &dst_far);
/* Make sure prepare will not free the buf because it will be
* needed in the later test case.
*/
net_buf_ref(buf);
buf2 = net_arp_prepare(buf);
if (buf2) {
printk("ARP cache should fail now\n");
return;
}
/* Try to find the different destination, this should fail too
* as the cache table should be full.
*/
net_ipaddr_copy(&ipv4->dst, &dst_far2);
/* Make sure prepare will not free the buf because it will be
* needed in the next test case.
*/
net_buf_ref(buf);
buf2 = net_arp_prepare(buf);
if (buf2) {
printk("ARP cache should fail again\n");
return;
}
/* Restore the original address so that following test case can
* work properly.
*/
net_ipaddr_copy(&ipv4->dst, &dst);
/* The arp request packet is now verified, create an arp reply.
* The previous value of buf is stored in arp table and is not lost.
*/
buf = net_nbuf_get_reserve_rx(0);
if (!buf) {
printk("Out of mem RX reply\n");
return;
}
frag = net_nbuf_get_reserve_data(sizeof(struct net_eth_hdr));
if (!frag) {
printk("Out of mem DATA reply\n");
return;
}
net_buf_frag_add(buf, frag);
net_nbuf_ll_reserve(buf) = net_buf_headroom(frag);
net_nbuf_iface(buf) = iface;
arp_hdr = (struct net_arp_hdr *)net_nbuf_ip_data(buf);
net_buf_add(buf, sizeof(struct net_arp_hdr));
net_ipaddr_copy(&arp_hdr->dst_ipaddr, &dst);
net_ipaddr_copy(&arp_hdr->src_ipaddr, &src);
buf2 = prepare_arp_reply(iface, buf, &hwaddr);
if (!buf2) {
printk("ARP reply generation failed.");
return;
}
switch (net_arp_input(buf2)) {
case NET_OK:
break;
case NET_DROP:
break;
}
/* Yielding so that network interface TX fiber can proceed. */
fiber_yield();
if (send_status < 0) {
printk("ARP reply was not sent\n");
return;
}
if (buf->ref != 1) {
printk("ARP cache should no longer own the original buffer\n");
return;
}
net_nbuf_unref(buf);
/* Then feed in ARP request */
buf = net_nbuf_get_reserve_rx(0);
if (!buf) {
printk("Out of mem RX request\n");
return;
}
frag = net_nbuf_get_reserve_data(sizeof(struct net_eth_hdr));
if (!frag) {
printk("Out of mem DATA request\n");
return;
}
net_buf_frag_add(buf, frag);
net_nbuf_ll_reserve(buf) = sizeof(struct net_eth_hdr);
net_nbuf_iface(buf) = iface;
send_status = -EINVAL;
arp_hdr = (struct net_arp_hdr *)(net_nbuf_ip_data(buf) -
net_nbuf_ll_reserve(buf));
net_buf_add(frag,
sizeof(struct net_arp_hdr) - net_nbuf_ll_reserve(buf));
net_ipaddr_copy(&arp_hdr->dst_ipaddr, &src);
net_ipaddr_copy(&arp_hdr->src_ipaddr, &dst);
setup_eth_header(iface, buf, &hwaddr, NET_ETH_PTYPE_ARP);
buf2 = prepare_arp_request(iface, buf, &hwaddr);
if (!buf2) {
printk("ARP request generation failed.");
return;
}
switch (net_arp_input(buf2)) {
case NET_OK:
break;
case NET_DROP:
break;
}
net_nbuf_unref(buf2);
/* Yielding so that network interface TX fiber can proceed. */
fiber_yield();
if (send_status < 0) {
printk("ARP req was not sent\n");
return;
}
net_nbuf_unref(buf);
printk("Network ARP checks passed\n");
}