1
2 /*
3 * ipresend.c (C) 1995-1998 Darren Reed
4 *
5 * See the IPFILTER.LICENCE file for details on licencing.
6 *
7 */
8 #include <sys/param.h>
9 #include <sys/types.h>
10 #include <sys/time.h>
11 #include <sys/socket.h>
12 #include <netinet/in.h>
13 #include <arpa/inet.h>
14 #include <netinet/in_systm.h>
15 #include <netinet/ip.h>
16 #include <netinet/ip_var.h>
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <unistd.h>
20 #include <netdb.h>
21 #include <string.h>
22 #include "ipsend.h"
23
24
25 extern char *optarg;
26 extern int optind;
27 #ifndef NO_IPF
28 extern struct ipread pcap, iphex, iptext;
29 #endif
30
31 int opts = 0;
32 #ifndef DEFAULT_DEVICE
33 # ifdef sun
34 char default_device[] = "le0";
35 # else
36 char default_device[] = "lan0";
37 # endif
38 #else
39 char default_device[] = DEFAULT_DEVICE;
40 #endif
41
42
43 static void usage(char *);
44 int main(int, char **);
45
46
usage(prog)47 static void usage(prog)
48 char *prog;
49 {
50 fprintf(stderr, "Usage: %s [options] <-r filename|-R filename>\n\
51 \t\t-r filename\tsnoop data file to resend\n\
52 \t\t-R filename\tlibpcap data file to resend\n\
53 \toptions:\n\
54 \t\t-d device\tSend out on this device\n\
55 \t\t-g gateway\tIP gateway to use if non-local dest.\n\
56 \t\t-m mtu\t\tfake MTU to use when sending out\n\
57 ", prog);
58 exit(1);
59 }
60
61
62 int
main(int argc,char ** argv)63 main(int argc, char **argv)
64 {
65 struct in_addr gwip;
66 struct ipread *ipr = NULL;
67 char *name = argv[0], *gateway = NULL, *dev = NULL;
68 char *resend = NULL;
69 int mtu = 1500, c;
70
71 while ((c = getopt(argc, argv, "EHPRSTXd:g:m:r:")) != -1)
72 switch (c)
73 {
74 case 'd' :
75 dev = optarg;
76 break;
77 case 'g' :
78 gateway = optarg;
79 break;
80 case 'm' :
81 mtu = atoi(optarg);
82 if (mtu < 28)
83 {
84 fprintf(stderr, "mtu must be > 28\n");
85 exit(1);
86 }
87 case 'r' :
88 resend = optarg;
89 break;
90 case 'R' :
91 opts |= OPT_RAW;
92 break;
93 #ifndef NO_IPF
94 case 'H' :
95 ipr = &iphex;
96 break;
97 case 'P' :
98 ipr = &pcap;
99 break;
100 case 'X' :
101 ipr = &iptext;
102 break;
103 #endif
104 default :
105 fprintf(stderr, "Unknown option \"%c\"\n", c);
106 usage(name);
107 }
108
109 if (!ipr || !resend)
110 usage(name);
111
112 gwip.s_addr = 0;
113 if (gateway && resolve(gateway, (char *)&gwip) == -1)
114 {
115 fprintf(stderr,"Cant resolve %s\n", gateway);
116 exit(2);
117 }
118
119 if (!dev)
120 dev = default_device;
121
122 printf("Device: %s\n", dev);
123 printf("Gateway: %s\n", inet_ntoa(gwip));
124 printf("mtu: %d\n", mtu);
125
126 return (ip_resend(dev, mtu, ipr, gwip, resend));
127 }
128