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