457 lines
11 KiB
C
457 lines
11 KiB
C
/* $NetBSD: natm.c,v 1.5 1996/11/09 03:26:26 chuck Exp $ */
|
|
/*-
|
|
*
|
|
* Copyright (c) 1996 Charles D. Cranor and Washington University.
|
|
* Copyright (c) 2005-2006 Robert N. M. Watson
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Charles D. Cranor and
|
|
* Washington University.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* natm.c: Native mode ATM access (both aal0 and aal5).
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/sx.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_atm.h>
|
|
#include <net/netisr.h>
|
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <netnatm/natm.h>
|
|
|
|
static const u_long natm5_sendspace = 16*1024;
|
|
static const u_long natm5_recvspace = 16*1024;
|
|
|
|
static const u_long natm0_sendspace = 16*1024;
|
|
static const u_long natm0_recvspace = 16*1024;
|
|
|
|
/*
|
|
* netnatm global subsystem lock, protects all global data structures in
|
|
* netnatm.
|
|
*/
|
|
struct mtx natm_mtx;
|
|
|
|
/*
|
|
* User socket requests.
|
|
*/
|
|
static int natm_usr_attach(struct socket *, int, d_thread_t *);
|
|
static void natm_usr_detach(struct socket *);
|
|
static int natm_usr_connect(struct socket *, struct sockaddr *,
|
|
d_thread_t *);
|
|
static int natm_usr_disconnect(struct socket *);
|
|
static int natm_usr_shutdown(struct socket *);
|
|
static int natm_usr_send(struct socket *, int, struct mbuf *,
|
|
struct sockaddr *, struct mbuf *, d_thread_t *);
|
|
static int natm_usr_peeraddr(struct socket *, struct sockaddr **);
|
|
static int natm_usr_control(struct socket *, u_long, caddr_t,
|
|
struct ifnet *, d_thread_t *);
|
|
static void natm_usr_abort(struct socket *);
|
|
static int natm_usr_bind(struct socket *, struct sockaddr *,
|
|
d_thread_t *);
|
|
static int natm_usr_sockaddr(struct socket *, struct sockaddr **);
|
|
|
|
static int
|
|
natm_usr_attach(struct socket *so, int proto, d_thread_t *p)
|
|
{
|
|
struct natmpcb *npcb;
|
|
int error = 0;
|
|
|
|
npcb = (struct natmpcb *)so->so_pcb;
|
|
KASSERT(npcb == NULL, ("natm_usr_attach: so_pcb != NULL"));
|
|
|
|
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
|
|
if (proto == PROTO_NATMAAL5)
|
|
error = soreserve(so, natm5_sendspace,
|
|
natm5_recvspace);
|
|
else
|
|
error = soreserve(so, natm0_sendspace,
|
|
natm0_recvspace);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
so->so_pcb = npcb = npcb_alloc(M_WAITOK);
|
|
npcb->npcb_socket = so;
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
natm_usr_detach(struct socket *so)
|
|
{
|
|
struct natmpcb *npcb;
|
|
|
|
npcb = (struct natmpcb *)so->so_pcb;
|
|
KASSERT(npcb != NULL, ("natm_usr_detach: npcb == NULL"));
|
|
|
|
NATM_LOCK();
|
|
npcb_free(npcb, NPCB_DESTROY); /* drain */
|
|
so->so_pcb = NULL;
|
|
NATM_UNLOCK();
|
|
}
|
|
|
|
static int
|
|
natm_usr_connect(struct socket *so, struct sockaddr *nam, d_thread_t *p)
|
|
{
|
|
struct natmpcb *npcb;
|
|
struct sockaddr_natm *snatm;
|
|
struct atmio_openvcc op;
|
|
struct ifnet *ifp;
|
|
int error = 0;
|
|
int proto = so->so_proto->pr_protocol;
|
|
|
|
npcb = (struct natmpcb *)so->so_pcb;
|
|
KASSERT(npcb != NULL, ("natm_usr_connect: npcb == NULL"));
|
|
|
|
/*
|
|
* Validate nam and npcb.
|
|
*/
|
|
NATM_LOCK();
|
|
snatm = (struct sockaddr_natm *)nam;
|
|
if (snatm->snatm_len != sizeof(*snatm) ||
|
|
(npcb->npcb_flags & NPCB_FREE) == 0) {
|
|
NATM_UNLOCK();
|
|
return (EINVAL);
|
|
}
|
|
if (snatm->snatm_family != AF_NATM) {
|
|
NATM_UNLOCK();
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
|
|
snatm->snatm_if[IFNAMSIZ - 1] = '\0'; /* XXX ensure null termination
|
|
since ifunit() uses strcmp */
|
|
|
|
/*
|
|
* Convert interface string to ifp, validate.
|
|
*/
|
|
ifp = ifunit(snatm->snatm_if);
|
|
if (ifp == NULL || (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
|
|
NATM_UNLOCK();
|
|
return (ENXIO);
|
|
}
|
|
if (ifp->if_output != atm_output) {
|
|
NATM_UNLOCK();
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
|
|
/*
|
|
* Register us with the NATM PCB layer.
|
|
*/
|
|
if (npcb_add(npcb, ifp, snatm->snatm_vci, snatm->snatm_vpi) != npcb) {
|
|
NATM_UNLOCK();
|
|
return (EADDRINUSE);
|
|
}
|
|
|
|
/*
|
|
* Open the channel.
|
|
*
|
|
* XXXRW: Eventually desirable to hold mutex over ioctl?
|
|
*/
|
|
bzero(&op, sizeof(op));
|
|
op.rxhand = npcb;
|
|
op.param.flags = ATMIO_FLAG_PVC;
|
|
op.param.vpi = npcb->npcb_vpi;
|
|
op.param.vci = npcb->npcb_vci;
|
|
op.param.rmtu = op.param.tmtu = ifp->if_mtu;
|
|
op.param.aal = (proto == PROTO_NATMAAL5) ? ATMIO_AAL_5 : ATMIO_AAL_0;
|
|
op.param.traffic = ATMIO_TRAFFIC_UBR;
|
|
NATM_UNLOCK();
|
|
|
|
IFF_LOCKGIANT(ifp);
|
|
if (ifp->if_ioctl == NULL ||
|
|
ifp->if_ioctl(ifp, SIOCATMOPENVCC, (caddr_t)&op) != 0) {
|
|
IFF_UNLOCKGIANT(ifp);
|
|
return (EIO);
|
|
}
|
|
IFF_UNLOCKGIANT(ifp);
|
|
soisconnected(so);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
natm_usr_disconnect(struct socket *so)
|
|
{
|
|
struct natmpcb *npcb;
|
|
struct atmio_closevcc cl;
|
|
struct ifnet *ifp;
|
|
int error = 0;
|
|
|
|
npcb = (struct natmpcb *)so->so_pcb;
|
|
KASSERT(npcb != NULL, ("natm_usr_disconnect: npcb == NULL"));
|
|
|
|
NATM_LOCK();
|
|
if ((npcb->npcb_flags & NPCB_CONNECTED) == 0) {
|
|
NATM_UNLOCK();
|
|
printf("natm: disconnected check\n");
|
|
return (EIO);
|
|
}
|
|
ifp = npcb->npcb_ifp;
|
|
|
|
/*
|
|
* Disable rx.
|
|
*
|
|
* XXXRW: Eventually desirable to hold mutex over ioctl?
|
|
*/
|
|
cl.vpi = npcb->npcb_vpi;
|
|
cl.vci = npcb->npcb_vci;
|
|
NATM_UNLOCK();
|
|
if (ifp->if_ioctl != NULL) {
|
|
IFF_LOCKGIANT(ifp);
|
|
ifp->if_ioctl(ifp, SIOCATMCLOSEVCC, (caddr_t)&cl);
|
|
IFF_UNLOCKGIANT(ifp);
|
|
}
|
|
soisdisconnected(so);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
natm_usr_shutdown(struct socket *so)
|
|
{
|
|
|
|
socantsendmore(so);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
natm_usr_send(struct socket *so, int flags, struct mbuf *m,
|
|
struct sockaddr *nam, struct mbuf *control, d_thread_t *p)
|
|
{
|
|
struct natmpcb *npcb;
|
|
struct atm_pseudohdr *aph;
|
|
int error = 0;
|
|
int proto = so->so_proto->pr_protocol;
|
|
|
|
npcb = (struct natmpcb *)so->so_pcb;
|
|
KASSERT(npcb != NULL, ("natm_usr_send: npcb == NULL"));
|
|
|
|
NATM_LOCK();
|
|
if (control && control->m_len) {
|
|
NATM_UNLOCK();
|
|
m_freem(control);
|
|
m_freem(m);
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Send the data. We must put an atm_pseudohdr on first.
|
|
*/
|
|
M_PREPEND(m, sizeof(*aph), M_DONTWAIT);
|
|
if (m == NULL) {
|
|
NATM_UNLOCK();
|
|
m_freem(control);
|
|
return (ENOBUFS);
|
|
}
|
|
aph = mtod(m, struct atm_pseudohdr *);
|
|
ATM_PH_VPI(aph) = npcb->npcb_vpi;
|
|
ATM_PH_SETVCI(aph, npcb->npcb_vci);
|
|
ATM_PH_FLAGS(aph) = (proto == PROTO_NATMAAL5) ? ATM_PH_AAL5 : 0;
|
|
error = atm_output(npcb->npcb_ifp, m, NULL, NULL);
|
|
NATM_UNLOCK();
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
natm_usr_peeraddr(struct socket *so, struct sockaddr **nam)
|
|
{
|
|
struct natmpcb *npcb;
|
|
struct sockaddr_natm *snatm, ssnatm;
|
|
|
|
npcb = (struct natmpcb *)so->so_pcb;
|
|
KASSERT(npcb != NULL, ("natm_usr_peeraddr: npcb == NULL"));
|
|
|
|
NATM_LOCK();
|
|
snatm = &ssnatm;
|
|
bzero(snatm, sizeof(*snatm));
|
|
snatm->snatm_len = sizeof(*snatm);
|
|
snatm->snatm_family = AF_NATM;
|
|
strlcpy(snatm->snatm_if, npcb->npcb_ifp->if_xname,
|
|
sizeof(snatm->snatm_if));
|
|
snatm->snatm_vci = npcb->npcb_vci;
|
|
snatm->snatm_vpi = npcb->npcb_vpi;
|
|
NATM_UNLOCK();
|
|
*nam = sodupsockaddr((struct sockaddr *)snatm, M_WAITOK);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
natm_usr_control(struct socket *so, u_long cmd, caddr_t arg,
|
|
struct ifnet *ifp, d_thread_t *p)
|
|
{
|
|
struct natmpcb *npcb;
|
|
int error;
|
|
|
|
npcb = (struct natmpcb *)so->so_pcb;
|
|
KASSERT(npcb != NULL, ("natm_usr_control: npcb == NULL"));
|
|
|
|
if (ifp == NULL || ifp->if_ioctl == NULL)
|
|
return (EOPNOTSUPP);
|
|
IFF_LOCKGIANT(ifp);
|
|
error = ((*ifp->if_ioctl)(ifp, cmd, arg));
|
|
IFF_UNLOCKGIANT(ifp);
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
natm_usr_abort(struct socket *so)
|
|
{
|
|
|
|
natm_usr_detach(so);
|
|
}
|
|
|
|
static int
|
|
natm_usr_bind(struct socket *so, struct sockaddr *nam, d_thread_t *p)
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
static int
|
|
natm_usr_sockaddr(struct socket *so, struct sockaddr **nam)
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/* xxx - should be const */
|
|
struct pr_usrreqs natm_usrreqs = {
|
|
.pru_abort = natm_usr_abort,
|
|
.pru_attach = natm_usr_attach,
|
|
.pru_bind = natm_usr_bind,
|
|
.pru_connect = natm_usr_connect,
|
|
.pru_control = natm_usr_control,
|
|
.pru_detach = natm_usr_detach,
|
|
.pru_disconnect = natm_usr_disconnect,
|
|
.pru_peeraddr = natm_usr_peeraddr,
|
|
.pru_send = natm_usr_send,
|
|
.pru_shutdown = natm_usr_shutdown,
|
|
.pru_sockaddr = natm_usr_sockaddr,
|
|
};
|
|
|
|
/*
|
|
* natmintr: interrupt
|
|
*
|
|
* Note: we expect a socket pointer in rcvif rather than an interface
|
|
* pointer. We can get the interface pointer from the so's PCB if we really
|
|
* need it.
|
|
*/
|
|
void
|
|
natmintr(struct mbuf *m)
|
|
{
|
|
struct socket *so;
|
|
struct natmpcb *npcb;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
M_ASSERTPKTHDR(m);
|
|
#endif
|
|
|
|
NATM_LOCK();
|
|
npcb = (struct natmpcb *)m->m_pkthdr.rcvif; /* XXX: overloaded */
|
|
so = npcb->npcb_socket;
|
|
|
|
npcb->npcb_inq--;
|
|
|
|
if (npcb->npcb_flags & NPCB_DRAIN) {
|
|
if (npcb->npcb_inq == 0)
|
|
FREE(npcb, M_PCB); /* done! */
|
|
NATM_UNLOCK();
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
if (npcb->npcb_flags & NPCB_FREE) {
|
|
NATM_UNLOCK();
|
|
m_freem(m); /* drop */
|
|
return;
|
|
}
|
|
|
|
#ifdef NEED_TO_RESTORE_IFP
|
|
m->m_pkthdr.rcvif = npcb->npcb_ifp;
|
|
#else
|
|
#ifdef DIAGNOSTIC
|
|
m->m_pkthdr.rcvif = NULL; /* null it out to be safe */
|
|
#endif
|
|
#endif
|
|
|
|
if (sbspace(&so->so_rcv) > m->m_pkthdr.len) {
|
|
#ifdef NATM_STAT
|
|
natm_sookcnt++;
|
|
natm_sookbytes += m->m_pkthdr.len;
|
|
#endif
|
|
sbappendrecord(&so->so_rcv, m);
|
|
sorwakeup(so);
|
|
NATM_UNLOCK();
|
|
} else {
|
|
#ifdef NATM_STAT
|
|
natm_sodropcnt++;
|
|
natm_sodropbytes += m->m_pkthdr.len;
|
|
#endif
|
|
NATM_UNLOCK();
|
|
m_freem(m);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* natm0_sysctl: not used, but here in case we want to add something
|
|
* later...
|
|
*/
|
|
int
|
|
natm0_sysctl(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
|
|
/* All sysctl names at this level are terminal. */
|
|
return (ENOENT);
|
|
}
|
|
|
|
/*
|
|
* natm5_sysctl: not used, but here in case we want to add something
|
|
* later...
|
|
*/
|
|
int
|
|
natm5_sysctl(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
|
|
/* All sysctl names at this level are terminal. */
|
|
return (ENOENT);
|
|
}
|