mirror of
https://git.rtems.org/rtems-libbsd/
synced 2025-05-13 08:19:24 +08:00
119 lines
3.4 KiB
C
119 lines
3.4 KiB
C
/**
|
|
* @file
|
|
*
|
|
* @brief This test program processes all ARP requests and claims every IP address it
|
|
* notices.
|
|
*
|
|
* Use with care in production networks.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2014 embedded brains GmbH. All rights reserved.
|
|
*
|
|
* embedded brains GmbH
|
|
* Dornierstr. 4
|
|
* 82178 Puchheim
|
|
* Germany
|
|
* <rtems@embedded-brains.de>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_arp.h>
|
|
#include <net/ethernet.h>
|
|
#include <arpa/inet.h>
|
|
#include <netinet/in.h>
|
|
|
|
#include <assert.h>
|
|
#include <ifaddrs.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <rtems/bsd/util.h>
|
|
|
|
#define TEST_NAME "LIBBSD ARP HOLE"
|
|
#define TEST_STATE_USER_INPUT 1
|
|
|
|
typedef struct {
|
|
struct ether_header eh;
|
|
struct arphdr arh;
|
|
uint8_t sha[ETHER_ADDR_LEN];
|
|
uint32_t spa;
|
|
uint8_t tha[ETHER_ADDR_LEN];
|
|
uint32_t tpa;
|
|
} __packed arp_request;
|
|
|
|
static void
|
|
arp_processor(void *arg, int fd, const uint8_t eaddr[ETHER_ADDR_LEN],
|
|
const struct arphdr *ar, uint32_t spa, uint32_t tpa,
|
|
const uint8_t *sha, const uint8_t *tha)
|
|
{
|
|
if (ar->ar_op == htons(ARPOP_REQUEST) && spa == htonl(INADDR_ANY) &&
|
|
tpa != htonl(INADDR_ANY)) {
|
|
arp_request arr;
|
|
|
|
memcpy(&arr.eh.ether_shost[0], &eaddr[0], ETHER_HDR_LEN);
|
|
memcpy(&arr.eh.ether_dhost[0], sha, ETHER_HDR_LEN);
|
|
arr.eh.ether_type = htons(ETHERTYPE_ARP);
|
|
|
|
arr.arh.ar_hrd = htons(ARPHRD_ETHER);
|
|
arr.arh.ar_pro = htons(ETHERTYPE_IP);
|
|
arr.arh.ar_hln = ETHER_ADDR_LEN;
|
|
arr.arh.ar_pln = sizeof(spa);
|
|
arr.arh.ar_op = htons(ARPOP_REPLY);
|
|
|
|
memcpy(&arr.sha[0], &eaddr[0], ETHER_ADDR_LEN);
|
|
arr.spa = tpa;
|
|
memcpy(&arr.tha[0], sha, ETHER_ADDR_LEN);
|
|
arr.tpa = htonl(INADDR_ANY);
|
|
|
|
write(fd, &arr, sizeof(arr));
|
|
}
|
|
}
|
|
|
|
static void
|
|
test_main(void)
|
|
{
|
|
char ifnamebuf[IF_NAMESIZE];
|
|
char *ifname;
|
|
rtems_bsd_arp_processor_context *ctx;
|
|
|
|
ifname = if_indextoname(1, &ifnamebuf[0]);
|
|
assert(ifname != NULL);
|
|
|
|
ctx = rtems_bsd_arp_processor_create(ifname);
|
|
assert(ctx != NULL);
|
|
|
|
while (1) {
|
|
rtems_bsd_arp_processor_process(ctx, arp_processor, NULL);
|
|
}
|
|
}
|
|
|
|
#define DEFAULT_NETWORK_NO_STATIC_IFCONFIG
|
|
|
|
#include <rtems/bsd/test/default-network-init.h>
|