100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
/* $NetBSD: udp_xfer.c,v 1.2 2008/04/29 06:53:01 martin Exp $ */
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/*-
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* Copyright (c) 2006 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by David Laight.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: udp_xfer.c,v 1.2 2008/04/29 06:53:01 martin Exp $");
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <sys/poll.h>
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#include <netdb.h>
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#include <err.h>
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typedef uint32_t n_long;
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#include <net.h>
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void
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set_port(struct sockaddr *sa, int port)
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{
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switch (sa->sa_family) {
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case AF_INET:
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((struct sockaddr_in *)sa)->sin_port = port;
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break;
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#ifdef INET6
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case AF_INET6:
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((struct sockaddr_in6 *)sa)->sin6_port = port;
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break;
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#endif
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default:
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errx(1, "Unsupported socket family %d",
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sa->sa_family);
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}
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}
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ssize_t
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sendudp(struct iodesc *d, void *pkt, size_t len)
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{
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int sock;
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int range = IP_PORTRANGE_LOW;
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if (d->socket >= 0) {
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close(d->socket);
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d->socket = -1;
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}
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sock = socket(d->ai->ai_family, SOCK_DGRAM, IPPROTO_UDP);
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if (sock < 0)
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return -1;
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d->socket = sock;
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set_port(d->ai->ai_addr, d->destport);
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setsockopt(sock, IPPROTO_IP, IP_PORTRANGE, &range, sizeof(range));
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if (connect(sock, d->ai->ai_addr, d->ai->ai_addrlen) != 0)
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return -1;
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return send(sock, pkt, len, 0);
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}
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ssize_t
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readudp(struct iodesc *d, void *pkt, size_t len, time_t tleft)
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{
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struct pollfd pfd = {d->socket, POLLIN, 0};
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if (poll(&pfd, 1, tleft * 1000) != 1)
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return -1;
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return recv(d->socket, pkt, len, 0);
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}
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