335 lines
8.6 KiB
C
335 lines
8.6 KiB
C
/* $NetBSD: if_atmsubr.c,v 1.15 1998/05/01 03:50:59 thorpej 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.
|
|
*/
|
|
|
|
/*
|
|
* if_atmsubr.c
|
|
*/
|
|
|
|
#include "opt_gateway.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/syslog.h>
|
|
|
|
#include <machine/cpu.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/netisr.h>
|
|
#include <net/route.h>
|
|
#include <net/if_dl.h>
|
|
#include <net/if_types.h>
|
|
#include <net/if_atm.h>
|
|
#include <net/ethertypes.h> /* XXX: for ETHERTYPE_* */
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/if_atm.h>
|
|
|
|
#ifdef INET
|
|
#include <netinet/in_var.h>
|
|
#endif
|
|
#ifdef NATM
|
|
#include <netnatm/natm.h>
|
|
#endif
|
|
|
|
#define senderr(e) { error = (e); goto bad;}
|
|
|
|
/*
|
|
* atm_output: ATM output routine
|
|
* inputs:
|
|
* "ifp" = ATM interface to output to
|
|
* "m0" = the packet to output
|
|
* "dst" = the sockaddr to send to (either IP addr, or raw VPI/VCI)
|
|
* "rt0" = the route to use
|
|
* returns: error code [0 == ok]
|
|
*
|
|
* note: special semantic: if (dst == NULL) then we assume "m" already
|
|
* has an atm_pseudohdr on it and just send it directly.
|
|
* [for native mode ATM output] if dst is null, then
|
|
* rt0 must also be NULL.
|
|
*/
|
|
|
|
int
|
|
atm_output(ifp, m0, dst, rt0)
|
|
register struct ifnet *ifp;
|
|
struct mbuf *m0;
|
|
struct sockaddr *dst;
|
|
struct rtentry *rt0;
|
|
{
|
|
u_int16_t etype = 0; /* if using LLC/SNAP */
|
|
int s, error = 0, sz;
|
|
struct atm_pseudohdr atmdst, *ad;
|
|
register struct mbuf *m = m0;
|
|
register struct rtentry *rt;
|
|
struct atmllc *atmllc;
|
|
u_int32_t atm_flags;
|
|
|
|
if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
|
|
senderr(ENETDOWN);
|
|
ifp->if_lastchange = time;
|
|
|
|
/*
|
|
* check route
|
|
*/
|
|
if ((rt = rt0) != NULL) {
|
|
|
|
if ((rt->rt_flags & RTF_UP) == 0) { /* route went down! */
|
|
if ((rt0 = rt = RTALLOC1(dst, 0)) != NULL)
|
|
rt->rt_refcnt--;
|
|
else
|
|
senderr(EHOSTUNREACH);
|
|
}
|
|
|
|
if (rt->rt_flags & RTF_GATEWAY) {
|
|
if (rt->rt_gwroute == 0)
|
|
goto lookup;
|
|
if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
|
|
rtfree(rt); rt = rt0;
|
|
lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 0);
|
|
if ((rt = rt->rt_gwroute) == 0)
|
|
senderr(EHOSTUNREACH);
|
|
}
|
|
}
|
|
|
|
/* XXX: put RTF_REJECT code here if doing ATMARP */
|
|
|
|
}
|
|
|
|
/*
|
|
* check for non-native ATM traffic (dst != NULL)
|
|
*/
|
|
if (dst) {
|
|
switch (dst->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (!atmresolve(rt, m, dst, &atmdst)) {
|
|
m = NULL;
|
|
/* XXX: atmresolve already free'd it */
|
|
senderr(EHOSTUNREACH);
|
|
/* XXX: put ATMARP stuff here */
|
|
/* XXX: watch who frees m on failure */
|
|
}
|
|
etype = ETHERTYPE_IP;
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__)
|
|
printf("%s: can't handle af%d\n", ifp->if_xname,
|
|
dst->sa_family);
|
|
#elif defined(__FreeBSD__) || defined(__bsdi__)
|
|
printf("%s%d: can't handle af%d\n", ifp->if_name,
|
|
ifp->if_unit, dst->sa_family);
|
|
#endif
|
|
senderr(EAFNOSUPPORT);
|
|
}
|
|
|
|
/*
|
|
* must add atm_pseudohdr to data
|
|
*/
|
|
sz = sizeof(atmdst);
|
|
atm_flags = ATM_PH_FLAGS(&atmdst);
|
|
if (atm_flags & ATM_PH_LLCSNAP) sz += 8; /* sizeof snap == 8 */
|
|
M_PREPEND(m, sz, M_DONTWAIT);
|
|
if (m == 0)
|
|
senderr(ENOBUFS);
|
|
ad = mtod(m, struct atm_pseudohdr *);
|
|
*ad = atmdst;
|
|
if (atm_flags & ATM_PH_LLCSNAP) {
|
|
atmllc = (struct atmllc *)(ad + 1);
|
|
bcopy(ATMLLC_HDR, atmllc->llchdr,
|
|
sizeof(atmllc->llchdr));
|
|
ATM_LLC_SETTYPE(atmllc, etype);
|
|
/* note: already in network order */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Queue message on interface, and start output if interface
|
|
* not yet active.
|
|
*/
|
|
|
|
s = splimp();
|
|
if (IF_QFULL(&ifp->if_snd)) {
|
|
IF_DROP(&ifp->if_snd);
|
|
splx(s);
|
|
senderr(ENOBUFS);
|
|
}
|
|
ifp->if_obytes += m->m_pkthdr.len;
|
|
IF_ENQUEUE(&ifp->if_snd, m);
|
|
if ((ifp->if_flags & IFF_OACTIVE) == 0)
|
|
(*ifp->if_start)(ifp);
|
|
splx(s);
|
|
return (error);
|
|
|
|
bad:
|
|
if (m)
|
|
m_freem(m);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Process a received ATM packet;
|
|
* the packet is in the mbuf chain m.
|
|
*/
|
|
void
|
|
atm_input(ifp, ah, m, rxhand)
|
|
struct ifnet *ifp;
|
|
register struct atm_pseudohdr *ah;
|
|
struct mbuf *m;
|
|
void *rxhand;
|
|
{
|
|
register struct ifqueue *inq;
|
|
u_int16_t etype = ETHERTYPE_IP; /* default */
|
|
int s;
|
|
|
|
if ((ifp->if_flags & IFF_UP) == 0) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
ifp->if_lastchange = time;
|
|
ifp->if_ibytes += m->m_pkthdr.len;
|
|
|
|
if (rxhand) {
|
|
#ifdef NATM
|
|
struct natmpcb *npcb = rxhand;
|
|
s = splimp(); /* in case 2 atm cards @ diff lvls */
|
|
npcb->npcb_inq++; /* count # in queue */
|
|
splx(s);
|
|
schednetisr(NETISR_NATM);
|
|
inq = &natmintrq;
|
|
m->m_pkthdr.rcvif = rxhand; /* XXX: overload */
|
|
#else
|
|
printf("atm_input: NATM detected but not configured in kernel\n");
|
|
m_freem(m);
|
|
return;
|
|
#endif
|
|
} else {
|
|
/*
|
|
* handle LLC/SNAP header, if present
|
|
*/
|
|
if (ATM_PH_FLAGS(ah) & ATM_PH_LLCSNAP) {
|
|
struct atmllc *alc;
|
|
if (m->m_len < sizeof(*alc) && (m = m_pullup(m, sizeof(*alc))) == 0)
|
|
return; /* failed */
|
|
alc = mtod(m, struct atmllc *);
|
|
if (bcmp(alc, ATMLLC_HDR, 6)) {
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__)
|
|
printf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
|
|
ifp->if_xname, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
|
|
#elif defined(__FreeBSD__) || defined(__bsdi__)
|
|
printf("%s%d: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
|
|
ifp->if_name, ifp->if_unit, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
|
|
#endif
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
etype = ATM_LLC_TYPE(alc);
|
|
m_adj(m, sizeof(*alc));
|
|
}
|
|
|
|
switch (etype) {
|
|
#ifdef INET
|
|
case ETHERTYPE_IP:
|
|
#ifdef GATEWAY
|
|
if (ipflow_fastforward(m))
|
|
return;
|
|
#endif
|
|
schednetisr(NETISR_IP);
|
|
inq = &ipintrq;
|
|
break;
|
|
#endif /* INET */
|
|
default:
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
}
|
|
|
|
s = splimp();
|
|
if (IF_QFULL(inq)) {
|
|
IF_DROP(inq);
|
|
m_freem(m);
|
|
} else
|
|
IF_ENQUEUE(inq, m);
|
|
splx(s);
|
|
}
|
|
|
|
/*
|
|
* Perform common duties while attaching to interface list
|
|
*/
|
|
void
|
|
atm_ifattach(ifp)
|
|
register struct ifnet *ifp;
|
|
{
|
|
register struct ifaddr *ifa;
|
|
register struct sockaddr_dl *sdl;
|
|
|
|
ifp->if_type = IFT_ATM;
|
|
ifp->if_addrlen = 0;
|
|
ifp->if_hdrlen = 0;
|
|
ifp->if_mtu = ATMMTU;
|
|
ifp->if_output = atm_output;
|
|
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__)
|
|
for (ifa = ifp->if_addrlist.tqh_first; ifa != 0;
|
|
ifa = ifa->ifa_list.tqe_next)
|
|
#elif defined(__FreeBSD__) && ((__FreeBSD__ > 2) || defined(_NET_IF_VAR_H_))
|
|
/*
|
|
* for FreeBSD-3.0. 3.0-SNAP-970124 still sets -D__FreeBSD__=2!
|
|
* XXX -- for now, use newly-introduced "net/if_var.h" as an identifier.
|
|
* need a better way to identify 3.0. -- kjc
|
|
*/
|
|
for (ifa = ifp->if_addrhead.tqh_first; ifa;
|
|
ifa = ifa->ifa_link.tqe_next)
|
|
#elif defined(__FreeBSD__) || defined(__bsdi__)
|
|
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
|
|
#endif
|
|
|
|
if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
|
|
sdl->sdl_family == AF_LINK) {
|
|
sdl->sdl_type = IFT_ATM;
|
|
sdl->sdl_alen = ifp->if_addrlen;
|
|
#ifdef notyet /* if using ATMARP, store hardware address using the next line */
|
|
bcopy(ifp->hw_addr, LLADDR(sdl), ifp->if_addrlen);
|
|
#endif
|
|
break;
|
|
}
|
|
}
|