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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 (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
*
* nlsrequest(3):
*
* Send service request message to remote listener
* on previously established virtual circuit to remote
* listener process.
*
* If an error occurrs, t_errno will contain an error code.
*
* Setting the external integer "_nlslog" to any non-zero
* value before calling nlsrequest, will cause nlsrequest
* to print debug information on stderr.
*
* client/server process pairs should include their own
* initial handshake to insure connectivity.
*
* This version of nlsrequest includes the
* service request response message.
*/
#include <stdio.h>
#include <ctype.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <sys/tiuser.h>
#include "listen.h"
extern int _nlslog; /* non-zero allows use of stderr */
char *_nlsrmsg = (char *)0;
static char _nlsbuf[256];
int
nlsrequest(int fd, char *svc_code)
{
int len, err, flags;
char buf[256];
char *p;
int ret;
extern int t_errno;
t_errno = 0; /* indicates a 'name' problem */
buf[0] = 0;
/*
* Validate service code
*/
if (!svc_code || !strlen(svc_code) ||
(strlen(svc_code) >= (size_t)SVC_CODE_SZ)) {
if (_nlslog) {
fprintf(stderr,
"nlsrequest: invalid service code format\n");
}
return (-1);
}
/*
* send protocol message requesting the service
*/
len = sprintf(buf, nls_v2_msg, svc_code) + 1; /* inc trailing null */
if (t_snd(fd, buf, len, 0) < len) {
if (_nlslog)
t_error("t_snd of listener request message failed");
return (-1);
}
p = _nlsbuf;
len = 0;
do {
if (++len > sizeof (_nlsbuf)) {
if (_nlslog) {
fprintf(stderr,
"nlsrequest: _nlsbuf not large enough\n");
}
return (-1);
}
if (t_rcv(fd, p, sizeof (char), &flags) != sizeof (char)) {
if (_nlslog) {
t_error("t_rcv of listener response msg "
"failed");
}
return (-1);
}
} while (*p++ != '\0');
if ((p = strtok(_nlsbuf, ":")) == NULL)
goto parsefail;
/*
* We ignore the version number here as we do not have any use for it.
* Previous versions of the code looked at it by calling atoi() on it,
* which did not mutate the actual string and did not use it.
*/
if ((p = strtok(NULL, ":")) == NULL)
goto parsefail;
ret = atoi(p);
_nlsrmsg = p + strlen(p) + 1;
if (ret && _nlslog)
fprintf(stderr, "%s\n", _nlsrmsg); /* debug only */
return (ret);
parsefail:
if (_nlslog) {
fprintf(stderr,
"nlsrequest: failed parse of response message\n");
}
return (-1);
}
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