1: /*
2: * $Id: rpc_tcp.c,v 1.1.1.3 2023/09/27 11:11:38 misho 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
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: (uint8_t *)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
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:
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