Annotation of embedaddon/libnet/sample/rpc_udp.c, revision 1.1
1.1 ! misho 1: /*
! 2: * $Id: rpc_udp.c,v 1.2 2004/01/03 20:31:01 mike Exp $
! 3: *
! 4: * libnet 1.1
! 5: * Build an RPC UDP 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:
! 39: int
! 40: main(int argc, char *argv[])
! 41: {
! 42: int c;
! 43: u_char *cp;
! 44: libnet_t *l;
! 45: libnet_ptag_t t;
! 46: libnet_ptag_t ip;
! 47: libnet_ptag_t udp;
! 48: char *payload;
! 49: u_short payload_s;
! 50: u_long src_ip, dst_ip;
! 51: u_short src_prt, dst_prt;
! 52: char errbuf[LIBNET_ERRBUF_SIZE];
! 53:
! 54: printf("libnet 1.1 packet shaping: RPC + UDP + IP options[raw]\n");
! 55:
! 56: /*
! 57: * Initialize the library. Root priviledges are required.
! 58: */
! 59: l = libnet_init(
! 60: LIBNET_RAW4, /* injection type */
! 61: NULL, /* network interface */
! 62: errbuf); /* errbuf */
! 63:
! 64: if (l == NULL)
! 65: {
! 66: fprintf(stderr, "libnet_init() failed: %s\n", errbuf);
! 67: exit(EXIT_FAILURE);
! 68: }
! 69:
! 70: src_ip = 0;
! 71: dst_ip = 0;
! 72: src_prt = 0;
! 73: dst_prt = 0;
! 74: payload = NULL;
! 75: payload_s = 0;
! 76: udp = 0;
! 77: while ((c = getopt(argc, argv, "d:s:p:")) != 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 'd':
! 88: if (!(cp = strrchr(optarg, '.')))
! 89: {
! 90: usage(argv[0]);
! 91: }
! 92: *cp++ = 0;
! 93: dst_prt = (u_short)atoi(cp);
! 94: if ((dst_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1)
! 95: {
! 96: fprintf(stderr, "Bad destination IP address: %s\n", optarg); exit(EXIT_FAILURE);
! 97: }
! 98: break;
! 99: case 's':
! 100: if (!(cp = strrchr(optarg, '.')))
! 101: {
! 102: usage(argv[0]);
! 103: }
! 104: *cp++ = 0;
! 105: src_prt = (u_short)atoi(cp);
! 106: if ((src_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1)
! 107: {
! 108: fprintf(stderr, "Bad source IP address: %s\n", optarg);
! 109: exit(EXIT_FAILURE);
! 110: }
! 111: break;
! 112: case 'p':
! 113: payload = optarg;
! 114: payload_s = strlen(payload);
! 115: break;
! 116: default:
! 117: exit(EXIT_FAILURE);
! 118: }
! 119: }
! 120:
! 121: if (!src_ip || !src_prt || !dst_ip || !dst_prt)
! 122: {
! 123: usage(argv[0]);
! 124: exit(EXIT_FAILURE);
! 125: }
! 126:
! 127: t = libnet_build_rpc_call(
! 128: 0,
! 129: 0x10e70082,
! 130: 0x000186a0,
! 131: 2,
! 132: 4,
! 133: 0,
! 134: 0,
! 135: NULL,
! 136: 0,
! 137: 0,
! 138: NULL,
! 139: payload,
! 140: payload_s,
! 141: l,
! 142: 0);
! 143: if (t == -1)
! 144: {
! 145: fprintf(stderr, "Can't build RPC header: %s\n", libnet_geterror(l));
! 146: goto bad;
! 147: }
! 148:
! 149: udp = libnet_build_udp(
! 150: src_prt, /* source port */
! 151: dst_prt, /* destination port */
! 152: LIBNET_UDP_H + 40 +payload_s, /* packet length */
! 153: 0, /* checksum */
! 154: NULL, /* payload */
! 155: 0, /* payload size */
! 156: l, /* libnet handle */
! 157: udp); /* libnet id */
! 158: if (udp == -1)
! 159: {
! 160: fprintf(stderr, "Can't build UDP header: %s\n", libnet_geterror(l));
! 161: goto bad;
! 162: }
! 163:
! 164: ip = libnet_build_ipv4(
! 165: LIBNET_IPV4_H + 40 + payload_s + LIBNET_UDP_H, /* length */
! 166: 0, /* TOS */
! 167: 242, /* IP ID */
! 168: 0, /* IP Frag */
! 169: 64, /* TTL */
! 170: IPPROTO_UDP, /* protocol */
! 171: 0, /* checksum */
! 172: src_ip,
! 173: dst_ip,
! 174: NULL, /* payload */
! 175: 0, /* payload size */
! 176: l, /* libnet handle */
! 177: 0); /* libnet id */
! 178: if (ip == -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 UDP packet; check the wire.\n", c);
! 196: }
! 197:
! 198: libnet_destroy(l);
! 199: return (EXIT_SUCCESS);
! 200: bad:
! 201: libnet_destroy(l);
! 202: return (EXIT_FAILURE);
! 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: /* EOF */
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