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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1997 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "talk_ctl.h"
#include <sys/time.h>
#include <libintl.h>
#define CTL_WAIT 2
/* the amount of time to wait for a response, in seconds */
/*
* SOCKDGRAM is unreliable, so we must repeat messages if we have
* not recieved an acknowledgement within a reasonable amount of time
*/
void
ctl_transact(target, msg, type, response)
struct in_addr target;
CTL_MSG msg;
int type;
CTL_RESPONSE *response;
{
struct sockaddr junk;
int read_mask;
int ctl_mask;
int nready;
int cc;
socklen_t junk_size;
struct timeval wait;
wait.tv_sec = CTL_WAIT;
wait.tv_usec = 0;
msg.type = type;
daemon_addr.sin_addr = target;
daemon_addr.sin_port = daemon_port;
ctl_mask = 1 << ctl_sockt;
/*
* keep sending the message until a response of the right
* type is obtained
*/
do {
/* keep sending the message until a response is obtained */
do {
cc = sendto(ctl_sockt,
(char *)&msg, sizeof (CTL_MSG), 0,
(struct sockaddr *)&daemon_addr, sizeof (daemon_addr));
if (cc != sizeof (CTL_MSG)) {
if (errno == EINTR) {
/* we are returning from an interupt */
continue;
} else {
p_error(
gettext("Error on write to talk daemon"));
}
}
read_mask = ctl_mask;
while ((nready = select(32, (fd_set *)&read_mask,
0, 0, &wait)) < 0) {
if (errno == EINTR) {
/* we are returning from an interupt */
continue;
} else {
p_error(
gettext("Error on waiting for response from daemon"));
}
}
} while (nready == 0);
/*
* keep reading while there are queued messages
* (this is not necessary, it just saves extra
* request/acknowledgements being sent)
*/
do {
junk_size = (socklen_t)sizeof (junk);
cc = recvfrom(ctl_sockt, (char *)response,
sizeof (CTL_RESPONSE), 0, &junk, &junk_size);
if (cc < 0) {
if (errno == EINTR) {
continue;
}
p_error(gettext("Error on read from talk daemon"));
}
read_mask = ctl_mask;
/* an immediate poll */
timerclear(&wait);
nready = select(32, (fd_set *)&read_mask, 0, 0, &wait);
} while (nready > 0 && response->type != type);
} while (response->type != type);
}
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