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1.1 misho 1: /*
2: * $Id: icmp_echo_cq.c,v 1.3 2004/01/03 20:31:01 mike Exp $
3: *
4: * libnet 1.1
5: * Build ICMP_ECHO packets using the context queue interface.
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: #include "./libnet_test.h"
34:
35: void usage(char *);
36:
37:
38: int
39: main(int argc, char **argv)
40: {
41: libnet_t *l = NULL;
42: u_long src_ip = 0, dst_ip = 0;
43: u_long count = 10;
44: int i, c;
45: libnet_ptag_t t;
46: char *payload = NULL;
47: u_short payload_s = 0;
48:
49: char *device = NULL;
50: char *pDst = NULL, *pSrc = NULL;
51: char errbuf[LIBNET_ERRBUF_SIZE];
52: char label[LIBNET_LABEL_SIZE];
53:
54: printf("libnet 1.1 packet shaping: ICMP[RAW using context queue]\n");
55:
56: while((c = getopt(argc, argv, "d:s:i:c:p:")) != EOF)
57: {
58: switch (c)
59: {
60: case 'd':
61: pDst = optarg;
62: break;
63: case 's':
64: pSrc = optarg;
65: break;
66: case 'i':
67: device = optarg;
68: break;
69: case 'c':
70: count = strtoul(optarg, 0, 10);
71: break;
72: case 'p':
73: payload = optarg;
74: payload_s = strlen(payload);
75: break;
76: }
77: }
78:
79: if (!pSrc || !pDst)
80: {
81: usage(argv[0]);
82: exit(EXIT_FAILURE);
83: }
84:
85: /*
86: * Fill the context queue with "count" packets, each with their own
87: * context.
88: */
89: for (i = 0; i < count; i++)
90: {
91: l = libnet_init(
92: LIBNET_RAW4, /* injection type */
93: device, /* network interface */
94: errbuf); /* errbuf */
95:
96: if (l == NULL)
97: {
98: /* we should run through the queue and free any stragglers */
99: fprintf(stderr, "libnet_init() failed: %s", errbuf);
100: exit(EXIT_FAILURE);
101: }
102: /*
103: * Since we need a libnet context for address resolution it is
104: * necessary to put this inside the loop.
105: */
106: if (!dst_ip && (dst_ip = libnet_name2addr4(l, pDst,
107: LIBNET_RESOLVE)) == -1)
108: {
109: fprintf(stderr, "Bad destination IP address: %s\n", pDst);
110: exit(1);
111: }
112: if (!src_ip && (src_ip = libnet_name2addr4(l, pSrc,
113: LIBNET_RESOLVE)) == -1)
114: {
115: fprintf(stderr, "Bad source IP address: %s\n", pSrc);
116: exit(1);
117: }
118:
119: t = libnet_build_icmpv4_echo(
120: ICMP_ECHO, /* type */
121: 0, /* code */
122: 0, /* checksum */
123: 0x42, /* id */
124: 0x42, /* sequence number */
125: NULL, /* payload */
126: 0, /* payload size */
127: l, /* libnet handle */
128: 0);
129: if (t == -1)
130: {
131: fprintf(stderr, "Can't build ICMP header: %s\n",
132: libnet_geterror(l));
133: goto bad;
134: }
135:
136: t = libnet_build_ipv4(
137: LIBNET_IPV4_H + LIBNET_ICMPV4_ECHO_H + payload_s, /* length */
138: 0, /* TOS */
139: 0x42, /* IP ID */
140: 0, /* IP Frag */
141: 64, /* TTL */
142: IPPROTO_ICMP, /* protocol */
143: 0, /* checksum */
144: src_ip, /* source IP */
145: dst_ip, /* destination IP */
1.1.1.2 ! misho 146: (uint8_t *)payload, /* payload */
1.1 misho 147: payload_s, /* payload size */
148: l, /* libnet handle */
149: 0);
150: if (t == -1)
151: {
152: fprintf(stderr, "Can't build IP header: %s\n", libnet_geterror(l));
153: goto bad;
154: }
155:
156: /* and finally, put it in the context queue */
157: snprintf(label, sizeof(label)-1, "echo %d", i);
158: if (libnet_cq_add(l, label) == -1)
159: {
160: fprintf(stderr, "add error: %s\n", libnet_geterror(l));
161: goto bad;
162: }
163: }
164:
165: for_each_context_in_cq(l)
166: {
167: c = libnet_write(l);
168: if (c == -1)
169: {
170: fprintf(stderr, "Write error: %s\n", libnet_geterror(l));
171: goto bad;
172: }
173: else
174: {
175: fprintf(stderr, "Wrote %d byte ICMP packet from context \"%s\"; "
176: "check the wire.\n", c, libnet_cq_getlabel(l));
177: }
178: }
179:
180: libnet_cq_destroy();
181: return (EXIT_SUCCESS);
182: bad:
183: libnet_cq_destroy();
184: libnet_destroy(l);
185: return (EXIT_FAILURE);
186: }
187:
188: void
189: usage(char *name)
190: {
191: fprintf(stderr, "usage: %s -s source_ip -d destination_ip"
192: " [-i iface] [-c count = 10]\n ", name);
193: }
194: