diff options
Diffstat (limited to 'libnet/sample/fddi_tcp1.c')
| -rw-r--r-- | libnet/sample/fddi_tcp1.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/libnet/sample/fddi_tcp1.c b/libnet/sample/fddi_tcp1.c new file mode 100644 index 0000000..e363333 --- /dev/null +++ b/libnet/sample/fddi_tcp1.c @@ -0,0 +1,213 @@ +/* + * libnet 1.1 + * Build a TCP packet to ride on FDDI + * + * Copyright (c) 1998 - 2001 Mike D. Schiffman <mike@infonexus.com> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +#if (HAVE_CONFIG_H) +#include "../include/config.h" +#endif +#include "./libnet_test.h" + +int +main(int argc, char *argv[]) +{ + int c; + u_char *cp; + libnet_t *l; + libnet_ptag_t t; + char *payload; + u_short payload_s; + u_long src_ip, dst_ip; + u_short src_prt, dst_prt; + char errbuf[LIBNET_ERRBUF_SIZE]; + + printf("libnet 1.1 packet shaping: TCP (over FDDI) [link]\n"); + + /* + * Initialize the library. Root priviledges are required. + * + * Currently hardcoded for fddi0. + */ + l = libnet_init( + LIBNET_LINK, /* injection type */ + "fddi0", /* network interface */ + errbuf); /* error buffer */ + + if (l == NULL) + { + fprintf(stderr, "libnet_init() failed: %s", errbuf); + exit(EXIT_FAILURE); + } + + src_ip = 0; + dst_ip = 0; + src_prt = 0; + dst_prt = 0; + payload = NULL; + payload_s = 0; + while ((c = getopt(argc, argv, "d:s:p:")) != EOF) + { + switch (c) + { + /* + * We expect the input to be of the form `ip.ip.ip.ip.port`. We + * point cp to the last dot of the IP address/port string and + * then seperate them with a NULL byte. The optarg now points to + * just the IP address, and cp points to the port. + */ + case 'd': + if (!(cp = strrchr(optarg, '.'))) + { + usage(argv[0]); + } + *cp++ = 0; + dst_prt = (u_short)atoi(cp); + if ((dst_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1) + { + fprintf(stderr, "Bad destination IP address: %s\n", optarg); + exit(EXIT_FAILURE); + } + break; + case 's': + if (!(cp = strrchr(optarg, '.'))) + { + usage(argv[0]); + } + *cp++ = 0; + src_prt = (u_short)atoi(cp); + if ((src_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1) + { + fprintf(stderr, "Bad source IP address: %s\n", optarg); + exit(EXIT_FAILURE); + } + break; + case 'p': + payload = optarg; + payload_s = strlen(payload); + break; + default: + exit(EXIT_FAILURE); + } + } + + if (!src_ip || !src_prt || !dst_ip || !dst_prt) + { + usage(argv[0]); + exit(EXIT_FAILURE); + } + + + t = libnet_build_tcp( + src_prt, /* source port */ + dst_prt, /* destination port */ + 0x01010101, /* sequence number */ + 0x02020202, /* acknowledgement num */ + TH_SYN, /* control flags */ + 32767, /* window size */ + 0, /* checksum */ + 0, /* urgent pointer */ + LIBNET_TCP_H + payload_s, /* TCP packet size */ + payload, /* payload */ + payload_s, /* payload size */ + l, /* libnet handle */ + 0); /* libnet id */ + if (t == -1) + { + fprintf(stderr, "Can't build TCP header: %s\n", libnet_geterror(l)); + goto bad; + } + + t = libnet_build_ipv4( + LIBNET_IPV4_H + LIBNET_TCP_H + payload_s, /* length */ + 0, /* TOS */ + 242, /* IP ID */ + 0, /* IP Frag */ + 64, /* TTL */ + IPPROTO_TCP, /* protocol */ + 0, /* checksum */ + src_ip, /* source IP */ + dst_ip, /* destination IP */ + NULL, /* payload */ + 0, /* payload size */ + l, /* libnet handle */ + 0); /* libnet id */ + if (t == -1) + { + fprintf(stderr, "Can't build IP header: %s\n", libnet_geterror(l)); + goto bad; + } + + t = libnet_build_fddi( + LIBNET_FDDI_FC_REQD | 0x04, /* Asynch LLC - priority 4 */ + fddi_dst, /* fddi destination */ + fddi_src, /* fddi source */ + LIBNET_SAP_SNAP, /* DSAP -> SNAP encap */ + LIBNET_SAP_SNAP, /* SSAP -> SNAP encap */ + 0x03, /* Unnumbered info/frame */ + org_code, /* Organization Code */ + FDDI_TYPE_IP, /* protocol type */ + NULL, /* payload */ + 0, /* payload size */ + l, /* libnet handle */ + 0); /* libnet id */ + if (t == -1) + { + fprintf(stderr, "Can't build fddi header: %s\n", libnet_geterror(l)); + goto bad; + } + + /* + * Write it to the wire. + */ + c = libnet_write(l); + if (c == -1) + { + fprintf(stderr, "Write error: %s\n", libnet_geterror(l)); + goto bad; + } + else + { + fprintf(stderr, "Wrote %d byte TCP packet; check the wire.\n", c); + } + libnet_destroy(l); + return (EXIT_SUCCESS); +bad: + libnet_destroy(l); + return (EXIT_FAILURE); +} + +void +usage(char *name) +{ + fprintf(stderr, + "usage: %s -s source_ip.source_port -d destination_ip.destination_port" + " [-p payload]\n", + name); +} + +/* EOF */ |