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NetBSD/sys/netnatm/natm.c

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/* $NetBSD: natm.c,v 1.7 2001/11/13 01:37:45 lukem Exp $ */
/*
*
* 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.
*/
/*
* natm.c: native mode ATM access (both aal0 and aal5).
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: natm.c,v 1.7 2001/11/13 01:37:45 lukem Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/domain.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <sys/protosw.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <net/if.h>
#include <net/if_atm.h>
#include <net/netisr.h>
#include <net/radix.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netnatm/natm.h>
u_long natm5_sendspace = 16*1024;
u_long natm5_recvspace = 16*1024;
u_long natm0_sendspace = 16*1024;
u_long natm0_recvspace = 16*1024;
/*
* user requests
*/
#if defined(__NetBSD__) || defined(__OpenBSD__)
int natm_usrreq(so, req, m, nam, control, p)
#elif defined(__FreeBSD__)
int natm_usrreq(so, req, m, nam, control)
#endif
struct socket *so;
int req;
struct mbuf *m, *nam, *control;
#if defined(__NetBSD__) || defined(__OpenBSD__)
struct proc *p;
#endif
{
int error = 0, s, s2;
struct natmpcb *npcb;
struct sockaddr_natm *snatm;
struct atm_pseudoioctl api;
struct atm_pseudohdr *aph;
struct atm_rawioctl ario;
struct ifnet *ifp;
int proto = so->so_proto->pr_protocol;
s = SPLSOFTNET();
npcb = (struct natmpcb *) so->so_pcb;
if (npcb == NULL && req != PRU_ATTACH) {
error = EINVAL;
goto done;
}
switch (req) {
case PRU_ATTACH: /* attach protocol to up */
if (npcb) {
error = EISCONN;
break;
}
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)
break;
}
so->so_pcb = (caddr_t) (npcb = npcb_alloc(M_WAITOK));
npcb->npcb_socket = so;
break;
case PRU_DETACH: /* detach protocol from up */
/*
* we turn on 'drain' *before* we sofree.
*/
npcb_free(npcb, NPCB_DESTROY); /* drain */
so->so_pcb = NULL;
sofree(so);
break;
case PRU_CONNECT: /* establish connection to peer */
/*
* validate nam and npcb
*/
if (nam->m_len != sizeof(*snatm)) {
error = EINVAL;
break;
}
snatm = mtod(nam, struct sockaddr_natm *);
if (snatm->snatm_len != sizeof(*snatm) ||
(npcb->npcb_flags & NPCB_FREE) == 0) {
error = EINVAL;
break;
}
if (snatm->snatm_family != AF_NATM) {
error = EAFNOSUPPORT;
break;
}
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_flags & IFF_RUNNING) == 0) {
error = ENXIO;
break;
}
if (ifp->if_output != atm_output) {
error = EAFNOSUPPORT;
break;
}
/*
* register us with the NATM PCB layer
*/
if (npcb_add(npcb, ifp, snatm->snatm_vci, snatm->snatm_vpi) != npcb) {
error = EADDRINUSE;
break;
}
/*
* enable rx
*/
ATM_PH_FLAGS(&api.aph) = (proto == PROTO_NATMAAL5) ? ATM_PH_AAL5 : 0;
ATM_PH_VPI(&api.aph) = npcb->npcb_vpi;
ATM_PH_SETVCI(&api.aph, npcb->npcb_vci);
api.rxhand = npcb;
s2 = splnet();
if (ifp->if_ioctl == NULL ||
ifp->if_ioctl(ifp, SIOCATMENA, (caddr_t) &api) != 0) {
splx(s2);
npcb_free(npcb, NPCB_REMOVE);
error = EIO;
break;
}
splx(s2);
soisconnected(so);
break;
case PRU_DISCONNECT: /* disconnect from peer */
if ((npcb->npcb_flags & NPCB_CONNECTED) == 0) {
printf("natm: disconnected check\n");
error = EIO;
break;
}
ifp = npcb->npcb_ifp;
/*
* disable rx
*/
ATM_PH_FLAGS(&api.aph) = ATM_PH_AAL5;
ATM_PH_VPI(&api.aph) = npcb->npcb_vpi;
ATM_PH_SETVCI(&api.aph, npcb->npcb_vci);
api.rxhand = npcb;
s2 = splnet();
if (ifp->if_ioctl != NULL)
ifp->if_ioctl(ifp, SIOCATMDIS, (caddr_t) &api);
splx(s);
npcb_free(npcb, NPCB_REMOVE);
soisdisconnected(so);
break;
case PRU_SHUTDOWN: /* won't send any more data */
socantsendmore(so);
break;
case PRU_SEND: /* send this data */
if (control && control->m_len) {
m_freem(control);
m_freem(m);
error = EINVAL;
break;
}
/*
* send the data. we must put an atm_pseudohdr on first
*/
M_PREPEND(m, sizeof(*aph), M_WAITOK);
if (m == NULL) {
error = ENOBUFS;
break;
}
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);
break;
case PRU_SENSE: /* return status into m */
/* return zero? */
break;
case PRU_PEERADDR: /* fetch peer's address */
snatm = mtod(nam, struct sockaddr_natm *);
bzero(snatm, sizeof(*snatm));
nam->m_len = snatm->snatm_len = sizeof(*snatm);
snatm->snatm_family = AF_NATM;
#if defined(__NetBSD__) || defined(__OpenBSD__)
bcopy(npcb->npcb_ifp->if_xname, snatm->snatm_if, sizeof(snatm->snatm_if));
#elif defined(__FreeBSD__)
sprintf(snatm->snatm_if, "%s%d", npcb->npcb_ifp->if_name,
npcb->npcb_ifp->if_unit);
#endif
snatm->snatm_vci = npcb->npcb_vci;
snatm->snatm_vpi = npcb->npcb_vpi;
break;
case PRU_CONTROL: /* control operations on protocol */
/*
* raw atm ioctl. comes in as a SIOCRAWATM. we convert it to
* SIOCXRAWATM and pass it to the driver.
*/
if ((u_long)m == SIOCRAWATM) {
if (npcb->npcb_ifp == NULL) {
error = ENOTCONN;
break;
}
ario.npcb = npcb;
ario.rawvalue = *((int *)nam);
error = npcb->npcb_ifp->if_ioctl(npcb->npcb_ifp,
SIOCXRAWATM, (caddr_t) &ario);
if (!error) {
if (ario.rawvalue)
npcb->npcb_flags |= NPCB_RAW;
else
npcb->npcb_flags &= ~(NPCB_RAW);
}
break;
}
error = EOPNOTSUPP;
break;
case PRU_BIND: /* bind socket to address */
case PRU_LISTEN: /* listen for connection */
case PRU_ACCEPT: /* accept connection from peer */
case PRU_CONNECT2: /* connect two sockets */
case PRU_ABORT: /* abort (fast DISCONNECT, DETATCH) */
/* (only happens if LISTEN socket) */
case PRU_RCVD: /* have taken data; more room now */
case PRU_FASTTIMO: /* 200ms timeout */
case PRU_SLOWTIMO: /* 500ms timeout */
case PRU_RCVOOB: /* retrieve out of band data */
case PRU_SENDOOB: /* send out of band data */
case PRU_PROTORCV: /* receive from below */
case PRU_PROTOSEND: /* send to below */
case PRU_SOCKADDR: /* fetch socket's address */
#ifdef DIAGNOSTIC
printf("natm: PRU #%d unsupported\n", req);
#endif
error = EOPNOTSUPP;
break;
default: panic("natm usrreq");
}
done:
splx(s);
return(error);
}
/*
* natmintr: splsoftnet 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()
{
int s;
struct mbuf *m;
struct socket *so;
struct natmpcb *npcb;
next:
s = splnet();
IF_DEQUEUE(&natmintrq, m);
splx(s);
if (m == NULL)
return;
#ifdef DIAGNOSTIC
if ((m->m_flags & M_PKTHDR) == 0)
panic("natmintr no HDR");
#endif
npcb = (struct natmpcb *) m->m_pkthdr.rcvif; /* XXX: overloaded */
so = npcb->npcb_socket;
s = splnet(); /* could have atm devs @ different levels */
npcb->npcb_inq--;
splx(s);
if (npcb->npcb_flags & NPCB_DRAIN) {
m_freem(m);
if (npcb->npcb_inq == 0)
FREE(npcb, M_PCB); /* done! */
goto next;
}
if (npcb->npcb_flags & NPCB_FREE) {
m_freem(m); /* drop */
goto next;
}
#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 ||
((npcb->npcb_flags & NPCB_RAW) != 0 && so->so_rcv.sb_cc < NPCB_RAWCC) ) {
#ifdef NATM_STAT
natm_sookcnt++;
natm_sookbytes += m->m_pkthdr.len;
#endif
sbappendrecord(&so->so_rcv, m);
sorwakeup(so);
} else {
#ifdef NATM_STAT
natm_sodropcnt++;
natm_sodropbytes += m->m_pkthdr.len;
#endif
m_freem(m);
}
goto next;
}
#if defined(__FreeBSD__)
NETISR_SET(NETISR_NATM, natmintr);
#endif
/*
* natm0_sysctl: not used, but here in case we want to add something
* later...
*/
int natm0_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
{
/* All sysctl names at this level are terminal. */
if (namelen != 1)
return (ENOTDIR);
return (ENOPROTOOPT);
}
/*
* natm5_sysctl: not used, but here in case we want to add something
* later...
*/
int natm5_sysctl(name, namelen, oldp, oldlenp, newp, newlen)
int *name;
u_int namelen;
void *oldp;
size_t *oldlenp;
void *newp;
size_t newlen;
{
/* All sysctl names at this level are terminal. */
if (namelen != 1)
return (ENOTDIR);
return (ENOPROTOOPT);
}
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