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| Current File : //compat/linux/proc/68247/root/compat/linux/proc/68247/root/sys/netnatm/natm.c |
/*-
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* Copyright (c) 1996 Charles D. Cranor and Washington University.
* 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.
*
* $NetBSD: natm.c,v 1.5 1996/11/09 03:26:26 chuck Exp $
*/
/*
* natm.c: Native mode ATM access (both aal0 and aal5).
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/netnatm/natm.c 192445 2009-05-20 17:00:16Z imp $");
#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, struct thread *);
static void natm_usr_detach(struct socket *);
static int natm_usr_connect(struct socket *, struct sockaddr *,
struct thread *);
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 *, struct thread *);
static int natm_usr_peeraddr(struct socket *, struct sockaddr **);
static int natm_usr_control(struct socket *, u_long, caddr_t,
struct ifnet *, struct thread *);
static void natm_usr_abort(struct socket *);
static int natm_usr_bind(struct socket *, struct sockaddr *,
struct thread *);
static int natm_usr_sockaddr(struct socket *, struct sockaddr **);
static int
natm_usr_attach(struct socket *so, int proto, struct thread *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, struct thread *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();
if (ifp->if_ioctl == NULL ||
ifp->if_ioctl(ifp, SIOCATMOPENVCC, (caddr_t)&op) != 0)
return (EIO);
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)
ifp->if_ioctl(ifp, SIOCATMCLOSEVCC, (caddr_t)&cl);
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, struct thread *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, struct thread *p)
{
struct natmpcb *npcb;
npcb = (struct natmpcb *)so->so_pcb;
KASSERT(npcb != NULL, ("natm_usr_control: npcb == NULL"));
switch (cmd) {
case SIOCSIFADDR:
case SIOCSIFBRDADDR:
case SIOCSIFDSTADDR:
case SIOCSIFNETMASK:
/*
* Although we should pass any non-ATM ioctl requests
* down to driver, we filter some legacy INET requests.
* Drivers trust SIOCSIFADDR et al to come from an already
* privileged layer, and do not perform any credentials
* checks or input validation.
*/
return (EINVAL);
}
if (ifp == NULL || ifp->if_ioctl == NULL)
return (EOPNOTSUPP);
return ((*ifp->if_ioctl)(ifp, cmd, arg));
}
static void
natm_usr_abort(struct socket *so)
{
}
static void
natm_usr_close(struct socket *so)
{
}
static int
natm_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *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,
.pru_close = natm_usr_close,
};
/*
* 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);
}