1 /* $NetBSD: udp_xfer.c,v 1.2 2008/04/29 06:53:01 martin Exp $ */
2
3 /*-
4 * Copyright (c) 2006 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by David Laight.
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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __RCSID("$NetBSD: udp_xfer.c,v 1.2 2008/04/29 06:53:01 martin Exp $");
34
35 #include <sys/types.h>
36 #include <unistd.h>
37 #include <sys/socket.h>
38 #include <netinet/in.h>
39 #include <sys/poll.h>
40 #include <netdb.h>
41 #include <err.h>
42
43 typedef uint32_t n_long;
44 #include <net.h>
45
46 void
set_port(struct sockaddr * sa,int port)47 set_port(struct sockaddr *sa, int port)
48 {
49
50 switch (sa->sa_family) {
51 case AF_INET:
52 ((struct sockaddr_in *)sa)->sin_port = port;
53 break;
54 #ifdef INET6
55 case AF_INET6:
56 ((struct sockaddr_in6 *)sa)->sin6_port = port;
57 break;
58 #endif
59 default:
60 errx(1, "Unsupported socket family %d",
61 sa->sa_family);
62 }
63 }
64
65 ssize_t
sendudp(struct iodesc * d,void * pkt,size_t len)66 sendudp(struct iodesc *d, void *pkt, size_t len)
67 {
68 int sock;
69 int range = IP_PORTRANGE_LOW;
70
71 if (d->socket >= 0) {
72 close(d->socket);
73 d->socket = -1;
74 }
75
76 sock = socket(d->ai->ai_family, SOCK_DGRAM, IPPROTO_UDP);
77 if (sock < 0)
78 return -1;
79 d->socket = sock;
80 set_port(d->ai->ai_addr, d->destport);
81
82 setsockopt(sock, IPPROTO_IP, IP_PORTRANGE, &range, sizeof(range));
83
84 if (connect(sock, d->ai->ai_addr, d->ai->ai_addrlen) != 0)
85 return -1;
86
87 return send(sock, pkt, len, 0);
88 }
89
90 ssize_t
readudp(struct iodesc * d,void * pkt,size_t len,time_t tleft)91 readudp(struct iodesc *d, void *pkt, size_t len, time_t tleft)
92 {
93 struct pollfd pfd = {d->socket, POLLIN, 0};
94
95 if (poll(&pfd, 1, tleft * 1000) != 1)
96 return -1;
97
98 return recv(d->socket, pkt, len, 0);
99 }
100