mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-16 10:20:30 +00:00
118 lines
3.8 KiB
C
118 lines
3.8 KiB
C
/*
|
|
* Copyright (c) 1983, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)ctl_transact.c 8.1 (Berkeley) 6/6/93";
|
|
#endif
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include "talk.h"
|
|
#include "talk_ctl.h"
|
|
|
|
#define CTL_WAIT 2 /* 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, rp)
|
|
struct in_addr target;
|
|
CTL_MSG msg;
|
|
int type;
|
|
CTL_RESPONSE *rp;
|
|
{
|
|
fd_set read_mask, ctl_mask;
|
|
int nready = 0, cc;
|
|
struct timeval wait;
|
|
|
|
msg.type = type;
|
|
daemon_addr.sin_addr = target;
|
|
daemon_addr.sin_port = daemon_port;
|
|
FD_ZERO(&ctl_mask);
|
|
FD_SET(ctl_sockt, &ctl_mask);
|
|
|
|
/*
|
|
* Keep sending the message until a response of
|
|
* the proper type is obtained.
|
|
*/
|
|
do {
|
|
wait.tv_sec = CTL_WAIT;
|
|
wait.tv_usec = 0;
|
|
/* resend message until a response is obtained */
|
|
do {
|
|
cc = sendto(ctl_sockt, (char *)&msg, sizeof (msg), 0,
|
|
(struct sockaddr *)&daemon_addr,
|
|
sizeof (daemon_addr));
|
|
if (cc != sizeof (msg)) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
p_error("Error on write to talk daemon");
|
|
}
|
|
read_mask = ctl_mask;
|
|
nready = select(32, &read_mask, 0, 0, &wait);
|
|
if (nready < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
p_error("Error waiting for daemon response");
|
|
}
|
|
} while (nready == 0);
|
|
/*
|
|
* Keep reading while there are queued messages
|
|
* (this is not necessary, it just saves extra
|
|
* request/acknowledgements being sent)
|
|
*/
|
|
do {
|
|
cc = recv(ctl_sockt, (char *)rp, sizeof (*rp), 0);
|
|
if (cc < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
p_error("Error on read from talk daemon");
|
|
}
|
|
read_mask = ctl_mask;
|
|
/* an immediate poll */
|
|
timerclear(&wait);
|
|
nready = select(32, &read_mask, 0, 0, &wait);
|
|
} while (nready > 0 && (rp->vers != TALK_VERSION ||
|
|
rp->type != type));
|
|
} while (rp->vers != TALK_VERSION || rp->type != type);
|
|
rp->id_num = ntohl(rp->id_num);
|
|
rp->addr.sa_family = ntohs(rp->addr.sa_family);
|
|
}
|