2 * $Id: libnet_write_ip.c,v 1.1.1.1 2000/05/25 00:28:49 route Exp $
5 * libnet_write_ip.c - writes a prebuilt IP packet to the network
7 * Copyright (c) 1998 - 2001 Mike D. Schiffman <mike@infonexus.com>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
34 #include "../include/config.h"
36 #include "../include/libnet.h"
39 libnet_write_ip(int sock, u_char *buf, int len)
42 struct sockaddr_in sin;
43 struct libnet_ip_hdr *ip_hdr;
45 ip_hdr = (struct libnet_ip_hdr *)buf;
47 #if (LIBNET_BSD_BYTE_SWAP)
49 * For link access, we don't need to worry about the inconsistencies of
50 * certain BSD kernels. However, raw socket nuances abound. Certain
51 * BSD implmentations require the ip_len and ip_off fields to be in host
52 * byte order. It's MUCH easier to change it here than inside the bpf
55 ip_hdr->ip_len = FIX(ip_hdr->ip_len);
56 ip_hdr->ip_off = FIX(ip_hdr->ip_off);
59 memset(&sin, 0, sizeof(struct sockaddr_in));
60 sin.sin_family = AF_INET;
61 sin.sin_addr.s_addr = ip_hdr->ip_dst.s_addr;
63 c = sendto(sock, buf, len, 0, (struct sockaddr *)&sin,
64 sizeof(struct sockaddr));
66 #if (LIBNET_BSD_BYTE_SWAP)
67 ip_hdr->ip_len = UNFIX(ip_hdr->ip_len);
68 ip_hdr->ip_off = UNFIX(ip_hdr->ip_off);
74 libnet_error(LIBNET_ERR_WARNING, "write_ip: %d bytes written (%s)\n",