/*

 *  $Id: udp2.c,v 1.6 2004/03/01 20:26:12 mike Exp $

 *

 *  libnet 1.1

 *  Build a UDP packet using port list chains

 *

 *  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.

 *

 */

#if (HAVE_CONFIG_H)

#include "../include/config.h"

#endif

#include "./libnet_test.h"

int

main(int argc, char **argv)

{

    int c, build_ip;

    struct timeval r;

    struct timeval s;

    struct timeval e;

    libnet_t *l;

    libnet_ptag_t udp;

    char *payload;

    libnet_ptag_t t;

    struct libnet_stats ls;

    uint16_t payload_s;

    uint32_t src_ip, dst_ip;

    uint16_t bport, eport, cport;

    libnet_plist_t plist, *plist_p;

    char errbuf[LIBNET_ERRBUF_SIZE];

    printf("libnet 1.1.2 packet shaping: UDP2[link]\n");

    l = libnet_init(

            LIBNET_LINK,                            /* injection type */

            NULL,                                   /* network interface */

            errbuf);                                /* errbuf */

    if (l == NULL)

    {

        fprintf(stderr, "libnet_init() failed: %s", errbuf);

        exit(EXIT_FAILURE);

    }

    src_ip = 0;

    dst_ip = 0;

    payload = NULL;

    payload_s = 0;

    plist_p = NULL;

    while ((c = getopt(argc, argv, "d:s:p:P:")) != EOF)

    {

        switch (c)

        {

            case 'd':

                if ((dst_ip = libnet_name2addr4(l, optarg,

                        LIBNET_RESOLVE)) == -1)

                {

                    fprintf(stderr, "Bad destination IP address: %s\n", optarg);                    

                    exit(1);

                }

                break;

            case 's':

                if ((src_ip = libnet_name2addr4(l, optarg,

                        LIBNET_RESOLVE)) == -1)

                {

                    fprintf(stderr, "Bad source IP address: %s\n", optarg);

                    exit(1);

                }

                break;

            case 'P':

                plist_p = &plist;

                if (libnet_plist_chain_new(l, &plist_p, optarg) == -1)

                {

                    fprintf(stderr, "Bad token in port list: %s\n",

                            libnet_geterror(l));

                    exit(1);

                }

                break;

            case 'p':

                payload = optarg;

                payload_s = strlen(payload);

                break;

            default:

                usage(argv[0]);

                exit(EXIT_FAILURE);

        }

    }

    if (!src_ip || !dst_ip || !plist_p)

    {

        usage(argv[0]);

        exit(EXIT_FAILURE);

    }

    udp = 0;

#if !(__WIN32__)

    gettimeofday(&s, NULL);

#else

    /* This obviously is not as good - but it compiles now. */

    s.tv_sec = time(NULL);

    s.tv_usec = 0;

#endif

    build_ip = 1;

    while (libnet_plist_chain_next_pair(plist_p, &bport, &eport))

    {

        while (!(bport > eport) && bport != 0)

        {

            cport = bport++;

            udp = libnet_build_udp(

                1025,                               /* source port */

                cport,                              /* destination port */

                LIBNET_UDP_H + payload_s,           /* packet size */

                0,                                  /* checksum */

                payload,                            /* payload */

                payload_s,                          /* payload size */

                l,                                  /* libnet handle */

                udp);                               /* libnet id */

            if (udp == -1)

            {

                fprintf(stderr, "Can't build UDP header (at port %d): %s\n", 

                        cport, libnet_geterror(l));

                goto bad;

            }

    if (build_ip)

    {

        build_ip = 0;

        t = libnet_build_ipv4(

            LIBNET_IPV4_H + LIBNET_UDP_H + payload_s,   /* length */

            0,                                          /* TOS */

            242,                                        /* IP ID */

            0,                                          /* IP Frag */

            64,                                         /* TTL */

            IPPROTO_UDP,                                /* protocol */

            0,                                          /* checksum */

            src_ip,                                     /* source IP */

            dst_ip,                                     /* destination IP */

            NULL,                                       /* payload */

            0,                                          /* payload size */

            l,                                          /* libnet handle */

            0);

        if (t == -1)

        {

            fprintf(stderr, "Can't build IP header: %s\n", libnet_geterror(l));

            goto bad;

        }

        t = libnet_build_ethernet(

            enet_dst,                                   /* ethernet dest */

            enet_src,                                   /* ethernet source */

            ETHERTYPE_IP,                               /* protocol type */

            NULL,                                       /* payload */

            0,                                          /* payload size */

            l,                                          /* libnet handle */

            0);

        if (t == -1)

        {

            fprintf(stderr, "Can't build ethernet header: %s\n",

                    libnet_geterror(l));

            goto bad;

        }

    }

            c = libnet_write(l); 

            if (c == -1)

            {

                fprintf(stderr, "write error: %s\n", libnet_geterror(l));

            }

            else

            {

               fprintf(stderr, "wrote %d byte UDP packet to port %d\r", c, 

                       cport);

            }

        }

        fprintf(stderr, "\n");

    }

#if !(__WIN32__)

    gettimeofday(&e, NULL);

#else

    /* This obviously is not as good - but it compiles now. */

    s.tv_sec = time(NULL);

    s.tv_usec = 0;

#endif

    libnet_timersub(&e, &s, &r);

    fprintf(stderr, "Total time spent in loop: %d.%d\n", r.tv_sec, r.tv_usec);

    libnet_stats(l, &ls);

    fprintf(stderr, "Packets sent:  %lld\n"

                    "Packet errors: %lld\n"

                    "Bytes written: %lld\n",

                    ls.packets_sent, ls.packet_errors, ls.bytes_written);

    libnet_destroy(l);

    return (EXIT_SUCCESS);

bad:

    libnet_destroy(l);

    return (EXIT_FAILURE);

}

void

usage(char *name)

{

    fprintf(stderr, "usage: %s -s s_ip -d d_ip -P port list [-p payload]\n", name);

}

/* EOF */