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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/stream.h>
#include <sys/strsubr.h>
#include <sys/stropts.h>
#include <sys/strsun.h>
#define _SUN_TPI_VERSION 2
#include <sys/tihdr.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/errno.h>
#include <sys/socket.h>
#include <sys/kmem.h>
#include <sys/random.h>
#include <sys/policy.h>
#include <netinet/in.h>
#include <inet/common.h>
#include <inet/ip.h>
#include <inet/nd.h>
#include <inet/ipclassifier.h>
#include <inet/optcom.h>
#include <inet/sctp_ip.h>
#include "sctp_impl.h"
/*
* sctp_wput_ioctl is called by sctp_wput to handle all
* M_IOCTL messages.
*/
void
sctp_wput_ioctl(queue_t *q, mblk_t *mp)
{
conn_t *connp = (conn_t *)q->q_ptr;
struct iocblk *iocp;
if (connp == NULL) {
ip0dbg(("sctp_wput_ioctl: null conn\n"));
return;
}
iocp = (struct iocblk *)mp->b_rptr;
switch (iocp->ioc_cmd) {
case ND_SET:
/* sctp_nd_getset() -> nd_getset() does the checking. */
case ND_GET:
if (!sctp_nd_getset(q, mp)) {
break;
}
qreply(q, mp);
return;
default:
iocp->ioc_error = EOPNOTSUPP;
break;
}
err_ret:
iocp->ioc_count = 0;
mp->b_datap->db_type = M_IOCNAK;
qreply(q, mp);
}
/*
* A SCTP streams driver which is there just to handle ioctls on /dev/sctp.
*/
static int sctp_str_close(queue_t *);
static int sctp_str_open(queue_t *, dev_t *, int, int, cred_t *);
static struct module_info sctp_mod_info = {
5711, "sctp", 1, INFPSZ, 512, 128
};
static struct qinit sctprinit = {
NULL, NULL, sctp_str_open, sctp_str_close, NULL, &sctp_mod_info
};
static struct qinit sctpwinit = {
(pfi_t)sctp_wput, NULL, NULL, NULL, NULL, &sctp_mod_info
};
struct streamtab sctpinfo = {
&sctprinit, &sctpwinit
};
static int
sctp_str_close(queue_t *q)
{
conn_t *connp = Q_TO_CONN(q);
qprocsoff(connp->conn_rq);
ASSERT(connp->conn_ref == 1);
inet_minor_free(connp->conn_minor_arena, connp->conn_dev);
q->q_ptr = WR(q)->q_ptr = NULL;
CONN_DEC_REF(connp);
return (0);
}
/*ARGSUSED2*/
static int
sctp_str_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp)
{
conn_t *connp;
major_t maj;
netstack_t *ns;
zoneid_t zoneid;
/* If the stream is already open, return immediately. */
if (q->q_ptr != NULL)
return (0);
/* If this is not a driver open, fail. */
if (sflag == MODOPEN)
return (EINVAL);
ns = netstack_find_by_cred(credp);
ASSERT(ns != NULL);
/*
* For exclusive stacks we set the zoneid to zero
* to make IP operate as if in the global zone.
*/
if (ns->netstack_stackid != GLOBAL_NETSTACKID)
zoneid = GLOBAL_ZONEID;
else
zoneid = crgetzoneid(credp);
/*
* We are opening as a device. This is an IP client stream, and we
* allocate an conn_t as the instance data.
*/
connp = ipcl_conn_create(IPCL_IPCCONN, KM_SLEEP, ns);
/*
* ipcl_conn_create did a netstack_hold. Undo the hold that was
* done by netstack_find_by_cred()
*/
netstack_rele(ns);
connp->conn_zoneid = zoneid;
connp->conn_ixa->ixa_flags |= IXAF_SET_ULP_CKSUM;
/* conn_allzones can not be set this early, hence no IPCL_ZONEID */
connp->conn_ixa->ixa_zoneid = zoneid;
connp->conn_rq = q;
connp->conn_wq = WR(q);
q->q_ptr = WR(q)->q_ptr = connp;
if ((ip_minor_arena_la != NULL) &&
(connp->conn_dev = inet_minor_alloc(ip_minor_arena_la)) != 0) {
connp->conn_minor_arena = ip_minor_arena_la;
} else {
/*
* Minor numbers in the large arena are exhausted.
* Try to allocate from the small arena.
*/
if ((connp->conn_dev = inet_minor_alloc(ip_minor_arena_sa))
== 0) {
/* CONN_DEC_REF takes care of netstack_rele() */
q->q_ptr = WR(q)->q_ptr = NULL;
CONN_DEC_REF(connp);
return (EBUSY);
}
connp->conn_minor_arena = ip_minor_arena_sa;
}
maj = getemajor(*devp);
*devp = makedevice(maj, (minor_t)connp->conn_dev);
/*
* connp->conn_cred is crfree()ed in ipcl_conn_destroy()
*/
ASSERT(connp->conn_cred == NULL);
connp->conn_cred = credp;
crhold(connp->conn_cred);
connp->conn_cpid = curproc->p_pid;
/* Cache things in ixa without an extra refhold */
connp->conn_ixa->ixa_cred = connp->conn_cred;
connp->conn_ixa->ixa_cpid = connp->conn_cpid;
if (is_system_labeled())
connp->conn_ixa->ixa_tsl = crgetlabel(connp->conn_cred);
/*
* Make the conn globally visible to walkers
*/
mutex_enter(&connp->conn_lock);
connp->conn_state_flags &= ~CONN_INCIPIENT;
mutex_exit(&connp->conn_lock);
ASSERT(connp->conn_ref == 1);
qprocson(q);
return (0);
}
/*
* The SCTP write put procedure which is used only to handle ioctls.
*/
void
sctp_wput(queue_t *q, mblk_t *mp)
{
uchar_t *rptr;
t_scalar_t type;
switch (mp->b_datap->db_type) {
case M_IOCTL:
sctp_wput_ioctl(q, mp);
break;
case M_DATA:
/* Should be handled in sctp_output() */
ASSERT(0);
freemsg(mp);
break;
case M_PROTO:
case M_PCPROTO:
rptr = mp->b_rptr;
if ((mp->b_wptr - rptr) >= sizeof (t_scalar_t)) {
type = ((union T_primitives *)rptr)->type;
/*
* There is no "standard" way on how to respond
* to T_CAPABILITY_REQ if a module does not
* understand it. And the current TI mod
* has problems handling an error ack. So we
* catch the request here and reply with a response
* which the TI mod knows how to respond to.
*/
switch (type) {
case T_CAPABILITY_REQ:
(void) putnextctl1(RD(q), M_ERROR, EPROTO);
break;
default:
if ((mp = mi_tpi_err_ack_alloc(mp,
TNOTSUPPORT, 0)) != NULL) {
qreply(q, mp);
return;
}
}
}
/* FALLTHRU */
default:
freemsg(mp);
return;
}
}
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