1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 1997 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
28*0Sstevel@tonic-gate /* All Rights Reserved */
29*0Sstevel@tonic-gate
30*0Sstevel@tonic-gate /*
31*0Sstevel@tonic-gate * University Copyright- Copyright (c) 1982, 1986, 1988
32*0Sstevel@tonic-gate * The Regents of the University of California
33*0Sstevel@tonic-gate * All Rights Reserved
34*0Sstevel@tonic-gate *
35*0Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from
36*0Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its
37*0Sstevel@tonic-gate * contributors.
38*0Sstevel@tonic-gate */
39*0Sstevel@tonic-gate
40*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
41*0Sstevel@tonic-gate
42*0Sstevel@tonic-gate #include "talk_ctl.h"
43*0Sstevel@tonic-gate #include <sys/time.h>
44*0Sstevel@tonic-gate #include <libintl.h>
45*0Sstevel@tonic-gate
46*0Sstevel@tonic-gate #define CTL_WAIT 2
47*0Sstevel@tonic-gate /* the amount of time to wait for a response, in seconds */
48*0Sstevel@tonic-gate
49*0Sstevel@tonic-gate
50*0Sstevel@tonic-gate /*
51*0Sstevel@tonic-gate * SOCKDGRAM is unreliable, so we must repeat messages if we have
52*0Sstevel@tonic-gate * not recieved an acknowledgement within a reasonable amount of time
53*0Sstevel@tonic-gate */
54*0Sstevel@tonic-gate
55*0Sstevel@tonic-gate void
ctl_transact(target,msg,type,response)56*0Sstevel@tonic-gate ctl_transact(target, msg, type, response)
57*0Sstevel@tonic-gate struct in_addr target;
58*0Sstevel@tonic-gate CTL_MSG msg;
59*0Sstevel@tonic-gate int type;
60*0Sstevel@tonic-gate CTL_RESPONSE *response;
61*0Sstevel@tonic-gate {
62*0Sstevel@tonic-gate struct sockaddr junk;
63*0Sstevel@tonic-gate int read_mask;
64*0Sstevel@tonic-gate int ctl_mask;
65*0Sstevel@tonic-gate int nready;
66*0Sstevel@tonic-gate int cc;
67*0Sstevel@tonic-gate socklen_t junk_size;
68*0Sstevel@tonic-gate struct timeval wait;
69*0Sstevel@tonic-gate
70*0Sstevel@tonic-gate wait.tv_sec = CTL_WAIT;
71*0Sstevel@tonic-gate wait.tv_usec = 0;
72*0Sstevel@tonic-gate
73*0Sstevel@tonic-gate msg.type = type;
74*0Sstevel@tonic-gate
75*0Sstevel@tonic-gate daemon_addr.sin_addr = target;
76*0Sstevel@tonic-gate daemon_addr.sin_port = daemon_port;
77*0Sstevel@tonic-gate
78*0Sstevel@tonic-gate ctl_mask = 1 << ctl_sockt;
79*0Sstevel@tonic-gate
80*0Sstevel@tonic-gate /*
81*0Sstevel@tonic-gate * keep sending the message until a response of the right
82*0Sstevel@tonic-gate * type is obtained
83*0Sstevel@tonic-gate */
84*0Sstevel@tonic-gate
85*0Sstevel@tonic-gate do {
86*0Sstevel@tonic-gate /* keep sending the message until a response is obtained */
87*0Sstevel@tonic-gate
88*0Sstevel@tonic-gate do {
89*0Sstevel@tonic-gate cc = sendto(ctl_sockt,
90*0Sstevel@tonic-gate (char *)&msg, sizeof (CTL_MSG), 0,
91*0Sstevel@tonic-gate (struct sockaddr *)&daemon_addr, sizeof (daemon_addr));
92*0Sstevel@tonic-gate
93*0Sstevel@tonic-gate if (cc != sizeof (CTL_MSG)) {
94*0Sstevel@tonic-gate if (errno == EINTR) {
95*0Sstevel@tonic-gate /* we are returning from an interupt */
96*0Sstevel@tonic-gate continue;
97*0Sstevel@tonic-gate } else {
98*0Sstevel@tonic-gate p_error(
99*0Sstevel@tonic-gate gettext("Error on write to talk daemon"));
100*0Sstevel@tonic-gate }
101*0Sstevel@tonic-gate }
102*0Sstevel@tonic-gate
103*0Sstevel@tonic-gate read_mask = ctl_mask;
104*0Sstevel@tonic-gate
105*0Sstevel@tonic-gate while ((nready = select(32, (fd_set *)&read_mask,
106*0Sstevel@tonic-gate 0, 0, &wait)) < 0) {
107*0Sstevel@tonic-gate if (errno == EINTR) {
108*0Sstevel@tonic-gate /* we are returning from an interupt */
109*0Sstevel@tonic-gate continue;
110*0Sstevel@tonic-gate } else {
111*0Sstevel@tonic-gate p_error(
112*0Sstevel@tonic-gate gettext("Error on waiting for response from daemon"));
113*0Sstevel@tonic-gate }
114*0Sstevel@tonic-gate }
115*0Sstevel@tonic-gate } while (nready == 0);
116*0Sstevel@tonic-gate
117*0Sstevel@tonic-gate /*
118*0Sstevel@tonic-gate * keep reading while there are queued messages
119*0Sstevel@tonic-gate * (this is not necessary, it just saves extra
120*0Sstevel@tonic-gate * request/acknowledgements being sent)
121*0Sstevel@tonic-gate */
122*0Sstevel@tonic-gate
123*0Sstevel@tonic-gate do {
124*0Sstevel@tonic-gate
125*0Sstevel@tonic-gate junk_size = (socklen_t)sizeof (junk);
126*0Sstevel@tonic-gate cc = recvfrom(ctl_sockt, (char *)response,
127*0Sstevel@tonic-gate sizeof (CTL_RESPONSE), 0, &junk, &junk_size);
128*0Sstevel@tonic-gate if (cc < 0) {
129*0Sstevel@tonic-gate if (errno == EINTR) {
130*0Sstevel@tonic-gate continue;
131*0Sstevel@tonic-gate }
132*0Sstevel@tonic-gate p_error(gettext("Error on read from talk daemon"));
133*0Sstevel@tonic-gate }
134*0Sstevel@tonic-gate
135*0Sstevel@tonic-gate read_mask = ctl_mask;
136*0Sstevel@tonic-gate
137*0Sstevel@tonic-gate /* an immediate poll */
138*0Sstevel@tonic-gate
139*0Sstevel@tonic-gate timerclear(&wait);
140*0Sstevel@tonic-gate nready = select(32, (fd_set *)&read_mask, 0, 0, &wait);
141*0Sstevel@tonic-gate
142*0Sstevel@tonic-gate } while (nready > 0 && response->type != type);
143*0Sstevel@tonic-gate
144*0Sstevel@tonic-gate } while (response->type != type);
145*0Sstevel@tonic-gate }
146