/*
* $Id: icmp_echo_cq.c,v 1.1.1.2 2023/09/27 11:11:38 misho Exp $
*
* libnet 1.1
* Build ICMP_ECHO packets using the context queue interface.
*
* Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
* All rights reserved.
*
* 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 "./libnet_test.h"
void usage(char *);
int
main(int argc, char **argv)
{
libnet_t *l = NULL;
u_long src_ip = 0, dst_ip = 0;
u_long count = 10;
int i, c;
libnet_ptag_t t;
char *payload = NULL;
u_short payload_s = 0;
char *device = NULL;
char *pDst = NULL, *pSrc = NULL;
char errbuf[LIBNET_ERRBUF_SIZE];
char label[LIBNET_LABEL_SIZE];
printf("libnet 1.1 packet shaping: ICMP[RAW using context queue]\n");
while((c = getopt(argc, argv, "d:s:i:c:p:")) != EOF)
{
switch (c)
{
case 'd':
pDst = optarg;
break;
case 's':
pSrc = optarg;
break;
case 'i':
device = optarg;
break;
case 'c':
count = strtoul(optarg, 0, 10);
break;
case 'p':
payload = optarg;
payload_s = strlen(payload);
break;
}
}
if (!pSrc || !pDst)
{
usage(argv[0]);
exit(EXIT_FAILURE);
}
/*
* Fill the context queue with "count" packets, each with their own
* context.
*/
for (i = 0; i < count; i++)
{
l = libnet_init(
LIBNET_RAW4, /* injection type */
device, /* network interface */
errbuf); /* errbuf */
if (l == NULL)
{
/* we should run through the queue and free any stragglers */
fprintf(stderr, "libnet_init() failed: %s", errbuf);
exit(EXIT_FAILURE);
}
/*
* Since we need a libnet context for address resolution it is
* necessary to put this inside the loop.
*/
if (!dst_ip && (dst_ip = libnet_name2addr4(l, pDst,
LIBNET_RESOLVE)) == -1)
{
fprintf(stderr, "Bad destination IP address: %s\n", pDst);
exit(1);
}
if (!src_ip && (src_ip = libnet_name2addr4(l, pSrc,
LIBNET_RESOLVE)) == -1)
{
fprintf(stderr, "Bad source IP address: %s\n", pSrc);
exit(1);
}
t = libnet_build_icmpv4_echo(
ICMP_ECHO, /* type */
0, /* code */
0, /* checksum */
0x42, /* id */
0x42, /* sequence number */
NULL, /* payload */
0, /* payload size */
l, /* libnet handle */
0);
if (t == -1)
{
fprintf(stderr, "Can't build ICMP header: %s\n",
libnet_geterror(l));
goto bad;
}
t = libnet_build_ipv4(
LIBNET_IPV4_H + LIBNET_ICMPV4_ECHO_H + payload_s, /* length */
0, /* TOS */
0x42, /* IP ID */
0, /* IP Frag */
64, /* TTL */
IPPROTO_ICMP, /* protocol */
0, /* checksum */
src_ip, /* source IP */
dst_ip, /* destination IP */
(uint8_t *)payload, /* payload */
payload_s, /* payload size */
l, /* libnet handle */
0);
if (t == -1)
{
fprintf(stderr, "Can't build IP header: %s\n", libnet_geterror(l));
goto bad;
}
/* and finally, put it in the context queue */
snprintf(label, sizeof(label)-1, "echo %d", i);
if (libnet_cq_add(l, label) == -1)
{
fprintf(stderr, "add error: %s\n", libnet_geterror(l));
goto bad;
}
}
for_each_context_in_cq(l)
{
c = libnet_write(l);
if (c == -1)
{
fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
goto bad;
}
else
{
fprintf(stderr, "Wrote %d byte ICMP packet from context \"%s\"; "
"check the wire.\n", c, libnet_cq_getlabel(l));
}
}
libnet_cq_destroy();
return (EXIT_SUCCESS);
bad:
libnet_cq_destroy();
libnet_destroy(l);
return (EXIT_FAILURE);
}
void
usage(char *name)
{
fprintf(stderr, "usage: %s -s source_ip -d destination_ip"
" [-i iface] [-c count = 10]\n ", name);
}
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