1 /*
2 * $Id: rpc_tcp.c,v 1.2 2004/01/03 20:31:01 mike Exp $
3 *
4 * libnet 1.1
5 * rpc_tcp.c - Build an RPC TCP packet
6 *
7 * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 */
32
33 #if (HAVE_CONFIG_H)
34 #include "../include/config.h"
35 #endif
36 #include "./libnet_test.h"
37
38 int
main(int argc,char ** argv)39 main(int argc, char **argv)
40 {
41 int c;
42 char *cp;
43 libnet_t *l;
44 libnet_ptag_t t;
45 char *payload;
46 u_short payload_s;
47 u_long src_ip, dst_ip;
48 u_short src_prt, dst_prt;
49 char errbuf[LIBNET_ERRBUF_SIZE];
50
51 printf("libnet 1.1 packet shaping: RPC TCP[raw]\n");
52
53 /*
54 * Initialize the library. Root priviledges are required.
55 */
56 l = libnet_init(
57 LIBNET_RAW4, /* injection type */
58 NULL, /* network interface */
59 errbuf); /* errbuf */
60
61 if (l == NULL)
62 {
63 fprintf(stderr, "libnet_init() failed: %s", errbuf);
64 exit(EXIT_FAILURE);
65 }
66
67 src_ip = 0;
68 dst_ip = 0;
69 src_prt = 0;
70 dst_prt = 0;
71 payload = NULL;
72 payload_s = 0;
73 while((c = getopt(argc, argv, "d:s:p:")) != EOF)
74 {
75 switch (c)
76 {
77 /*
78 * We expect the input to be of the form `ip.ip.ip.ip.port`. We
79 * point cp to the last dot of the IP address/port string and
80 * then seperate them with a NULL byte. The optarg now points to
81 * just the IP address, and cp points to the port.
82 */
83 case 'd':
84 if (!(cp = strrchr(optarg, '.')))
85 {
86 usage(argv[0]);
87 }
88 *cp++ = 0;
89 dst_prt = (u_short)atoi(cp);
90 if ((dst_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1)
91 {
92 fprintf(stderr, "Bad destination IP address: %s\n", optarg);
93 exit(EXIT_FAILURE);
94 }
95 break;
96 break;
97 case 'p':
98 payload = optarg;
99 payload_s = strlen(payload);
100 break;
101 case 's':
102 if (!(cp = strrchr(optarg, '.')))
103 {
104 usage(argv[0]);
105 }
106 *cp++ = 0;
107 src_prt = (u_short)atoi(cp);
108 if ((src_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1)
109 {
110 fprintf(stderr, "Bad source IP address: %s\n", optarg);
111 exit(EXIT_FAILURE);
112 }
113 break;
114 }
115 }
116 if (!src_ip || !src_prt || !dst_ip || !dst_prt)
117 {
118 usage(argv[0]);
119 exit(EXIT_FAILURE);
120 }
121
122 t = libnet_build_rpc_call(
123 LIBNET_RPC_LAST_FRAG | LIBNET_RPC_CALL_TCP_H,
124 0x10e70082,
125 LIBNET_PMAP_PROGRAM,
126 2,
127 LIBNET_PMAP_PROC_DUMP,
128 0,
129 0,
130 NULL,
131 0,
132 0,
133 NULL,
134 payload,
135 payload_s,
136 l,
137 0);
138 if (t == -1)
139 {
140 fprintf(stderr, "Can't build RPC header: %s\n", libnet_geterror(l));
141 goto bad;
142 }
143
144 t = libnet_build_tcp(
145 src_prt, /* source port */
146 dst_prt, /* destination port */
147 0x01010101, /* sequence number */
148 0x02020202, /* acknowledgement num */
149 TH_ACK, /* control flags */
150 32767, /* window size */
151 0, /* checksum */
152 0, /* urgent pointer */
153 LIBNET_TCP_H + 44 + payload_s, /* TCP packet size */
154 NULL, /* payload */
155 0, /* payload size */
156 l, /* libnet handle */
157 0); /* libnet id */
158 if (t == -1)
159 {
160 fprintf(stderr, "Can't build TCP header: %s\n", libnet_geterror(l));
161 goto bad;
162 }
163
164 t = libnet_build_ipv4(
165 LIBNET_IPV4_H + LIBNET_TCP_H + 44 + payload_s,/* length */
166 0, /* TOS */
167 242, /* IP ID */
168 0, /* IP Frag */
169 64, /* TTL */
170 IPPROTO_TCP, /* protocol */
171 0, /* checksum */
172 src_ip, /* source IP */
173 dst_ip, /* destination IP */
174 NULL, /* payload */
175 0, /* payload size */
176 l, /* libnet handle */
177 0); /* libnet id */
178 if (t == -1)
179 {
180 fprintf(stderr, "Can't build IP header: %s\n", libnet_geterror(l));
181 goto bad;
182 }
183
184 /*
185 * Write it to the wire.
186 */
187 c = libnet_write(l);
188 if (c == -1)
189 {
190 fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
191 goto bad;
192 }
193 else
194 {
195 fprintf(stderr, "Wrote %d byte RPC TCP packet; check the wire.\n", c);
196 }
197 libnet_destroy(l);
198 return (EXIT_SUCCESS);
199 bad:
200 libnet_destroy(l);
201 return (EXIT_FAILURE);
202 }
203
204
205 void
usage(char * name)206 usage(char *name)
207 {
208 fprintf(stderr,
209 "usage: %s -s source_ip.source_port -d destination_ip.destination_port"
210 " [-p payload]\n",
211 name);
212 }
213
214 /* EOF */
215