/*
 * ipresend.c (C) 1995-1998 Darren Reed
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 */
#include <sys/param.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <netdb.h>
#include <string.h>
#include "ipsend.h"


extern  char    *optarg;
extern  int     optind;
#ifndef NO_IPF
extern  struct  ipread  pcap, iphex, iptext;
#endif

int     opts = 0;
#ifndef DEFAULT_DEVICE
#  ifdef        sun
char    default_device[] = "le0";
#  else
char    default_device[] = "lan0";
#  endif
#else
char    default_device[] = DEFAULT_DEVICE;
#endif


static  void    usage(char *);
int     main(int, char **);


static void usage(prog)
        char    *prog;
{
        fprintf(stderr, "Usage: %s [options] <-r filename|-R filename>\n\
\t\t-r filename\tsnoop data file to resend\n\
\t\t-R filename\tlibpcap data file to resend\n\
\toptions:\n\
\t\t-d device\tSend out on this device\n\
\t\t-g gateway\tIP gateway to use if non-local dest.\n\
\t\t-m mtu\t\tfake MTU to use when sending out\n\
", prog);
        exit(1);
}


int
main(int argc, char **argv)
{
        struct  in_addr gwip;
        struct  ipread  *ipr = NULL;
        char    *name =  argv[0], *gateway = NULL, *dev = NULL;
        char    *resend = NULL;
        int     mtu = 1500, c;

        while ((c = getopt(argc, argv, "EHPRSTXd:g:m:r:")) != -1)
                switch (c)
                {
                case 'd' :
                        dev = optarg;
                        break;
                case 'g' :
                        gateway = optarg;
                        break;
                case 'm' :
                        mtu = atoi(optarg);
                        if (mtu < 28)
                            {
                                fprintf(stderr, "mtu must be > 28\n");
                                exit(1);
                            }
                case 'r' :
                        resend = optarg;
                        break;
                case 'R' :
                        opts |= OPT_RAW;
                        break;
#ifndef NO_IPF
                case 'H' :
                        ipr = &iphex;
                        break;
                case 'P' :
                        ipr = &pcap;
                        break;
                case 'X' :
                        ipr = &iptext;
                        break;
#endif
                default :
                        fprintf(stderr, "Unknown option \"%c\"\n", c);
                        usage(name);
                }

        if (!ipr || !resend)
                usage(name);

        gwip.s_addr = 0;
        if (gateway && resolve(gateway, (char *)&gwip) == -1)
            {
                fprintf(stderr,"Cant resolve %s\n", gateway);
                exit(2);
            }

        if (!dev)
                dev = default_device;

        printf("Device:  %s\n", dev);
        printf("Gateway: %s\n", inet_ntoa(gwip));
        printf("mtu:     %d\n", mtu);

        return (ip_resend(dev, mtu, ipr, gwip, resend));
}