dl_open.c revision 50c83d09652262aba75a6182b3203c80b48b092b
/*
* 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 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Data Link API - Open/Setup
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/stream.h>
#include <sys/stropts.h>
#include <sys/dlpi.h>
#include <errno.h>
#include <dluser.h>
#include <dlhdr.h>
static struct dl_descriptor *_dlfds;
static int _nfds;
extern struct dl_address *dl_mkaddress();
int
dl_open(char *dev, int mode, dl_info_t *info)
{
int fd;
if ((fd = open(dev, mode)) < 0) {
return (-1);
}
ioctl(fd, I_SRDOPT, RMSGD);
/* now have open device - do inforequest */
if (info == NULL)
return (dl_sync(fd));
else if (dl_info(fd, info) < 0)
return (-1);
else
return (fd);
}
/* this actually does the work that dl_open needs done also */
int
dl_sync(int fd)
{
struct strbuf ctl;
dl_info_req_t ireq;
dl_info_ack_t *iack;
char buff[sizeof (dl_info_ack_t)+64];
struct dl_descriptor *dl;
int flags;
/* first time? */
if (_nfds == 0) {
_nfds = ulimit(4, 0); /* number of possible file desc. */
_dlfds = (struct dl_descriptor *)malloc(_nfds *
sizeof (struct dl_descriptor));
if (_dlfds == NULL)
return (-1);
}
dl = &_dlfds[fd];
dl->openflag = 1;
/* get the info_ack data */
ctl.maxlen = ctl.len = sizeof (ireq);
ctl.buf = (char *)&ireq;
ireq.dl_primitive = DL_INFO_REQ;
if (putmsg(fd, &ctl, NULL, 0) < 0) {
close(fd);
return (-1);
}
iack = (dl_info_ack_t *)buff;
ctl.maxlen = sizeof (buff);
ctl.len = 0;
ctl.buf = (char *)iack;
flags = 0;
if (getmsg(fd, &ctl, NULL, &flags) < 0) {
close(fd);
return (-1);
}
/* now have all in place */
if (iack->dl_primitive != DL_INFO_ACK) {
close(fd);
return (-1);
}
/* now pick out the relevent information and fake the rest */
dl->info.state = iack->dl_current_state;
dl->info.max_lsdu = iack->dl_max_sdu;
dl->info.min_lsdu = iack->dl_min_sdu;
dl->info.addr_len = iack->dl_addr_length;
dl->info.mac_type = iack->dl_mac_type;
dl->info.class = iack->dl_service_mode;
dl->info.style = iack->dl_provider_style;
#if defined(DLPI_1)
dl->info.address = (struct dl_address *)NULL;
dl->info.broadcast = (struct dl_address *)NULL;
#else
dl->info.version = iack->dl_version;
dl->info.sap_len = iack->dl_sap_length;
dl->info.address = dl_mkaddress(fd, buff+iack->dl_addr_offset,
0, NULL, NULL);
dl->info.broadcast = dl_mkaddress(fd,
buff+iack->dl_brdcst_addr_offset, 0, NULL, NULL);
#endif
return (fd);
}
struct dl_descriptor *
_getdesc(int fd)
{
struct dl_descriptor *dl;
if (_nfds > 0 && fd < _nfds) {
dl = &_dlfds[fd];
if (dl->openflag)
return (dl);
}
return (NULL);
}
int
dl_error(int fd)
{
struct dl_descriptor *dl;
if (_nfds > 0 && fd < _nfds) {
dl = &_dlfds[fd];
if (dl->openflag) {
return (dl->error);
}
}
errno = EBADF;
return (DLSYSERR);
}