1 /* $FreeBSD: stable/12/sbin/ipf/ipsend/ipresend.c 371569 2022-02-07 13:57:53Z cy $ */
2
3 /*
4 * ipresend.c (C) 1995-1998 Darren Reed
5 *
6 * See the IPFILTER.LICENCE file for details on licencing.
7 *
8 */
9 #if !defined(lint)
10 static const char sccsid[] = "%W% %G% (C)1995 Darren Reed";
11 static const char rcsid[] = "@(#)$Id$";
12 #endif
13 #include <sys/param.h>
14 #include <sys/types.h>
15 #include <sys/time.h>
16 #include <sys/socket.h>
17 #include <netinet/in.h>
18 #include <arpa/inet.h>
19 #include <netinet/in_systm.h>
20 #include <netinet/ip.h>
21 #include <netinet/ip_var.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <unistd.h>
25 #include <netdb.h>
26 #include <string.h>
27 #include "ipsend.h"
28
29
30 extern char *optarg;
31 extern int optind;
32 #ifndef NO_IPF
33 extern struct ipread pcap, iphex, iptext;
34 #endif
35
36 int opts = 0;
37 #ifndef DEFAULT_DEVICE
38 # ifdef sun
39 char default_device[] = "le0";
40 # else
41 char default_device[] = "lan0";
42 # endif
43 #else
44 char default_device[] = DEFAULT_DEVICE;
45 #endif
46
47
48 static void usage(char *);
49 int main(int, char **);
50
51
usage(prog)52 static void usage(prog)
53 char *prog;
54 {
55 fprintf(stderr, "Usage: %s [options] <-r filename|-R filename>\n\
56 \t\t-r filename\tsnoop data file to resend\n\
57 \t\t-R filename\tlibpcap data file to resend\n\
58 \toptions:\n\
59 \t\t-d device\tSend out on this device\n\
60 \t\t-g gateway\tIP gateway to use if non-local dest.\n\
61 \t\t-m mtu\t\tfake MTU to use when sending out\n\
62 ", prog);
63 exit(1);
64 }
65
66
67 int
main(int argc,char ** argv)68 main(int argc, char **argv)
69 {
70 struct in_addr gwip;
71 struct ipread *ipr = NULL;
72 char *name = argv[0], *gateway = NULL, *dev = NULL;
73 char *resend = NULL;
74 int mtu = 1500, c;
75
76 while ((c = getopt(argc, argv, "EHPRSTXd:g:m:r:")) != -1)
77 switch (c)
78 {
79 case 'd' :
80 dev = optarg;
81 break;
82 case 'g' :
83 gateway = optarg;
84 break;
85 case 'm' :
86 mtu = atoi(optarg);
87 if (mtu < 28)
88 {
89 fprintf(stderr, "mtu must be > 28\n");
90 exit(1);
91 }
92 case 'r' :
93 resend = optarg;
94 break;
95 case 'R' :
96 opts |= OPT_RAW;
97 break;
98 #ifndef NO_IPF
99 case 'H' :
100 ipr = &iphex;
101 break;
102 case 'P' :
103 ipr = &pcap;
104 break;
105 case 'X' :
106 ipr = &iptext;
107 break;
108 #endif
109 default :
110 fprintf(stderr, "Unknown option \"%c\"\n", c);
111 usage(name);
112 }
113
114 if (!ipr || !resend)
115 usage(name);
116
117 gwip.s_addr = 0;
118 if (gateway && resolve(gateway, (char *)&gwip) == -1)
119 {
120 fprintf(stderr,"Cant resolve %s\n", gateway);
121 exit(2);
122 }
123
124 if (!dev)
125 dev = default_device;
126
127 printf("Device: %s\n", dev);
128 printf("Gateway: %s\n", inet_ntoa(gwip));
129 printf("mtu: %d\n", mtu);
130
131 return (ip_resend(dev, mtu, ipr, gwip, resend));
132 }
133