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 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23 /* All Rights Reserved */ 24 25 26 #ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.5.1.1 */ 27 28 /* 29 * 30 * nlsrequest(3): 31 * 32 * Send service request message to remote listener 33 * on previously established virtual circuit to remote 34 * listener process. 35 * 36 * If an error occurrs, t_errno will contain an error code. 37 * 38 * Setting the external integer "_nlslog" to any non-zero 39 * value before calling nlsrequest, will cause nlsrequest 40 * to print debug information on stderr. 41 * 42 * client/server process pairs should include their own 43 * initial handshake to insure connectivity. 44 * 45 * This version of nlsrequest includes the 46 * service request response message. 47 */ 48 49 50 #include <stdio.h> 51 #include <ctype.h> 52 #include <fcntl.h> 53 #include <errno.h> 54 #include <string.h> 55 #include <stdlib.h> 56 #include <sys/tiuser.h> 57 #include "listen.h" 58 59 extern int _nlslog; /* non-zero allows use of stderr */ 60 char *_nlsrmsg = (char *)0; 61 static char _nlsbuf[256]; 62 63 64 int 65 nlsrequest(int fd, char *svc_code) 66 { 67 int len, err, flags; 68 char buf[256]; 69 char *p; 70 int version, ret; 71 extern int t_errno; 72 73 t_errno = 0; /* indicates a 'name' problem */ 74 buf[0] = 0; 75 76 /* 77 * Validate service code 78 */ 79 80 if (!svc_code || !strlen(svc_code) || 81 (strlen(svc_code) >= (size_t)SVC_CODE_SZ)) { 82 if (_nlslog) 83 fprintf(stderr, "nlsrequest: invalid service code format\n"); 84 return(-1); 85 } 86 87 /* 88 * send protocol message requesting the service 89 */ 90 91 len = sprintf(buf, nls_v2_msg, svc_code)+1;/* inc trailing null */ 92 93 if (t_snd(fd, buf, len, 0) < len) { 94 if (_nlslog) 95 t_error("t_snd of listener request message failed"); 96 return(-1); 97 } 98 99 p = _nlsbuf; 100 len = 0; 101 102 do { 103 if (++len > sizeof(_nlsbuf)) { 104 if (_nlslog) 105 fprintf(stderr, "nlsrequest: _nlsbuf not large enough\n"); 106 return(-1); 107 } 108 if (t_rcv(fd, p, sizeof(char), &flags) != sizeof(char)) { 109 if (_nlslog) 110 t_error("t_rcv of listener response msg failed"); 111 return(-1); 112 } 113 114 } while (*p++ != '\0'); 115 116 117 if ((p = strtok(_nlsbuf, ":")) == (char *)0) 118 goto parsefail; 119 version = atoi(p); 120 121 if ((p = strtok((char *)0, ":")) == (char *)0) 122 goto parsefail; 123 ret = atoi(p); 124 _nlsrmsg = p + strlen(p) + 1; 125 if (ret && _nlslog) 126 fprintf(stderr, "%s\n", _nlsrmsg); /* debug only */ 127 return(ret); 128 129 parsefail: 130 if (_nlslog) 131 fprintf(stderr, "nlsrequest: failed parse of response message\n"); 132 return(-1); 133 } 134