2 * Copyright (c) 2005 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/usr.sbin/dntpd/socket.c,v 1.3 2005/04/25 17:42:49 dillon Exp $
40 udp_socket(const char *target, int port)
42 struct sockaddr_in sam;
48 if ((rc = inet_aton(target, &sam.sin_addr)) == 0) {
49 if ((hp = gethostbyname2(target, AF_INET)) == NULL) {
50 logerr("Unable to resolve %s", target);
53 bcopy(hp->h_addr_list[0], &sam.sin_addr, hp->h_length);
55 logerrstr("unable to resolve ip/host: %s", target);
58 if ((fd = socket(PF_INET, SOCK_DGRAM, PF_UNSPEC)) < 0) {
59 logerr("socket(%s)", target);
62 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
63 logerr("socket(%s) unable to set non-blocking mode", target);
67 sam.sin_port = htons(port);
68 sam.sin_len = sizeof(sam);
69 sam.sin_family = AF_INET;
70 if (connect(fd, (void *)&sam, sizeof(sam)) < 0) {
71 logerr("connect(%s)", target);
77 setsockopt(fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
81 tos = IP_PORTRANGE_HIGH;
82 setsockopt(fd, IPPROTO_IP, IP_PORTRANGE, &tos, sizeof(tos));