Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
NetBSD/sys/net/if_tokensubr.c

704 lines
18 KiB
C
Raw Blame History

/* $NetBSD: if_tokensubr.c,v 1.10 2000/06/14 05:10:28 mycroft Exp $ */
/*
* Copyright (c) 1997-1999
* Onno van der Linden
* Copyright (c) 1995
* Matt Thomas. All rights reserved.
* Copyright (c) 1982, 1989, 1993
* The Regents of the University of California. 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* from: NetBSD: if_fddisubr.c,v 1.2 1995/08/19 04:35:29 cgd Exp
*/
#include "opt_inet.h"
#include "opt_atalk.h"
#include "opt_ccitt.h"
#include "opt_llc.h"
#include "opt_iso.h"
#include "opt_ns.h"
#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_llc.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/if_ether.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/if_inarp.h>
#include <net/if_token.h>
#endif
#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
#ifdef DECNET
#include <netdnet/dn.h>
#endif
#ifdef ISO
#include <netiso/argo_debug.h>
#include <netiso/iso.h>
#include <netiso/iso_var.h>
#include <netiso/iso_snpac.h>
#endif
#include "bpfilter.h"
#ifdef LLC
#include <netccitt/dll.h>
#include <netccitt/llc_var.h>
#endif
/*
* TODO:
* handle source routing via send_xid()
* source routing for ISO,LLC,CCITT protocols
* need sockaddr_dl_8025 to handle this correctly
* IPX cases
* handle "fast" forwarding like if_ether and if_fddi
*/
#if defined(LLC) && defined(CCITT)
extern struct ifqueue pkintrq;
#endif
#define senderr(e) { error = (e); goto bad;}
#if defined(__bsdi__) || defined(__NetBSD__)
#define RTALLOC1(a, b) rtalloc1(a, b)
#define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e)
#define TYPEHTONS(t) (t)
#elif defined(__FreeBSD__)
#define RTALLOC1(a, b) rtalloc1(a, b, 0UL)
#define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e, f)
#define TYPEHTONS(t) (htons(t))
#endif
#define RCF_ALLROUTES (2 << 8) | TOKEN_RCF_FRAME2 | TOKEN_RCF_BROADCAST_ALL
#define RCF_SINGLEROUTE (2 << 8) | TOKEN_RCF_FRAME2 | TOKEN_RCF_BROADCAST_SINGLE
static int token_output __P((struct ifnet *, struct mbuf *,
struct sockaddr *, struct rtentry *));
static void token_input __P((struct ifnet *, struct mbuf *));
/*
* Token Ring output routine.
* Encapsulate a packet of type family for the local net.
* Assumes that ifp is actually pointer to arphdr structure.
* XXX route info has to go into the same mbuf as the header
*/
static int
token_output(ifp, m0, dst, rt0)
struct ifnet *ifp;
struct mbuf *m0;
struct sockaddr *dst;
struct rtentry *rt0;
{
u_int16_t etype;
int s, error = 0;
u_char edst[ISO88025_ADDR_LEN];
struct mbuf *m = m0;
struct rtentry *rt;
struct mbuf *mcopy = (struct mbuf *)0;
struct token_header *trh;
#ifdef INET
struct arphdr *ah = (struct arphdr *)ifp;
#endif /* INET */
struct token_rif *rif = (struct token_rif *)0;
struct token_rif bcastrif;
size_t riflen = 0;
if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
senderr(ENETDOWN);
ifp->if_lastchange = time;
if ((rt = rt0)) {
if ((rt->rt_flags & RTF_UP) == 0) {
if ((rt0 = rt = RTALLOC1(dst, 1)))
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, 1);
if ((rt = rt->rt_gwroute) == 0)
senderr(EHOSTUNREACH);
}
}
if (rt->rt_flags & RTF_REJECT)
if (rt->rt_rmx.rmx_expire == 0 ||
time.tv_sec < rt->rt_rmx.rmx_expire)
senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
}
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
if (m->m_flags & M_BCAST) {
if (ifp->if_flags & IFF_LINK0) {
if (ifp->if_flags & IFF_LINK1)
bcastrif.tr_rcf = htons(RCF_ALLROUTES);
else
bcastrif.tr_rcf = htons(RCF_SINGLEROUTE);
rif = &bcastrif;
riflen = sizeof(rif->tr_rcf);
}
bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst,
sizeof(edst));
}
/*
* XXX m->m_flags & M_MCAST IEEE802_MAP_IP_MULTICAST ??
*/
else {
if (!ARPRESOLVE(ifp, rt, m, dst, edst, rt0))
return (0); /* if not yet resolved */
rif = TOKEN_RIF((struct llinfo_arp *) rt->rt_llinfo);
riflen = (ntohs(rif->tr_rcf) & TOKEN_RCF_LEN_MASK) >> 8;
}
/* If broadcasting on a simplex interface, loopback a copy. */
if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
mcopy = m_copy(m, 0, (int)M_COPYALL);
etype = htons(ETHERTYPE_IP);
break;
case AF_ARP:
/*
* XXX source routing, assume m->m_data contains the useful stuff
*/
ah = mtod(m, struct arphdr *);
ah->ar_hrd = htons(ARPHRD_IEEE802);
switch(ntohs(ah->ar_op)) {
case ARPOP_REVREQUEST:
case ARPOP_REVREPLY:
etype = htons(ETHERTYPE_REVARP);
break;
case ARPOP_REQUEST:
case ARPOP_REPLY:
default:
etype = htons(ETHERTYPE_ARP);
}
if (m->m_flags & M_BCAST) {
if (ifp->if_flags & IFF_LINK0) {
if (ifp->if_flags & IFF_LINK1)
bcastrif.tr_rcf = htons(RCF_ALLROUTES);
else
bcastrif.tr_rcf = htons(RCF_SINGLEROUTE);
rif = &bcastrif;
riflen = sizeof(rif->tr_rcf);
}
bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst,
sizeof(edst));
}
else {
bcopy((caddr_t)ar_tha(ah), (caddr_t)edst, sizeof(edst));
trh = (struct token_header *)M_TRHSTART(m);
trh->token_ac = TOKEN_AC;
trh->token_fc = TOKEN_FC;
if (trh->token_shost[0] & TOKEN_RI_PRESENT) {
struct token_rif *trrif;
trrif = TOKEN_RIF(trh);
riflen = (ntohs(trrif->tr_rcf) & TOKEN_RCF_LEN_MASK) >> 8;
}
bcopy((caddr_t)edst, (caddr_t)trh->token_dhost,
sizeof (edst));
bcopy(LLADDR(ifp->if_sadl), (caddr_t)trh->token_shost,
sizeof(trh->token_shost));
if (riflen != 0)
trh->token_shost[0] |= TOKEN_RI_PRESENT;
/*
* compare (m->m_data - m->m_pktdat) with (sizeof(struct token_header) + riflen + ...
*/
m->m_len += (sizeof(*trh) + riflen + LLC_SNAPFRAMELEN);
m->m_data -= (sizeof(*trh) + riflen + LLC_SNAPFRAMELEN);
m->m_pkthdr.len += (sizeof(*trh) + riflen + LLC_SNAPFRAMELEN);
goto send;
}
break;
#endif
#ifdef NS
case AF_NS:
etype = htons(ETHERTYPE_NS);
bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host),
(caddr_t)edst, sizeof (edst));
if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst)))
return (looutput(ifp, m, dst, rt));
/* If broadcasting on a simplex interface, loopback a copy. */
if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
mcopy = m_copy(m, 0, (int)M_COPYALL);
break;
#endif
#ifdef ISO
case AF_ISO: {
int snpalen;
struct llc *l;
struct sockaddr_dl *sdl;
if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) &&
sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) {
bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst));
}
else if ((error =
iso_snparesolve(ifp, (struct sockaddr_iso *)dst,
(char *)edst, &snpalen)))
goto bad; /* Not resolved */
/* If broadcasting on a simplex interface, loopback a copy. */
if (*edst & 1)
m->m_flags |= (M_BCAST|M_MCAST);
if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) &&
(mcopy = m_copy(m, 0, (int)M_COPYALL))) {
M_PREPEND(mcopy, sizeof (*trh), M_DONTWAIT);
if (mcopy) {
trh = mtod(mcopy, struct token_header *);
bcopy((caddr_t)edst,
(caddr_t)trh->token_dhost, sizeof (edst));
bcopy(LLADDR(ifp->if_sadl),
(caddr_t)trh->token_shost, sizeof (edst));
}
}
M_PREPEND(m, 3, M_DONTWAIT);
if (m == NULL)
return (0);
etype = 0;
l = mtod(m, struct llc *);
l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP;
l->llc_control = LLC_UI;
#if defined(__FreeBSD__)
IFDEBUG(D_ETHER)
int i;
printf("token_output: sending pkt to: ");
for (i=0; i < ISO88025_ADDR_LEN; i++)
printf("%x ", edst[i] & 0xff);
printf("\n");
ENDDEBUG
#endif
} break;
#endif /* ISO */
#ifdef LLC
/* case AF_NSAP: */
case AF_CCITT: {
struct sockaddr_dl *sdl =
(struct sockaddr_dl *) rt -> rt_gateway;
if (sdl && sdl->sdl_family == AF_LINK
&& sdl->sdl_alen > 0) {
bcopy(LLADDR(sdl), (char *)edst, sizeof(edst));
}
else {
/* Not a link interface ? Funny ... */
goto bad;
}
if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) &&
(mcopy = m_copy(m, 0, (int)M_COPYALL))) {
M_PREPEND(mcopy, sizeof (*trh), M_DONTWAIT);
if (mcopy) {
trh = mtod(mcopy, struct token_header *);
bcopy((caddr_t)edst,
(caddr_t)trh->token_dhost, sizeof (edst));
bcopy(LLADDR(ifp->if_sadl),
(caddr_t)trh->token_shost, sizeof (edst));
}
}
etype = 0;
#ifdef LLC_DEBUG
{
int i;
struct llc *l = mtod(m, struct llc *);
printf("token_output: sending LLC2 pkt to: ");
for (i=0; i < ISO88025_ADDR_LEN; i++)
printf("%x ", edst[i] & 0xff);
printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n",
etype & 0xff, l->llc_dsap & 0xff, l->llc_ssap &0xff,
l->llc_control & 0xff);
}
#endif /* LLC_DEBUG */
}
break;
#endif /* LLC */
case AF_UNSPEC:
{
struct ether_header *eh;
eh = (struct ether_header *)dst->sa_data;
bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst));
if (*edst & 1)
m->m_flags |= (M_BCAST|M_MCAST);
etype = TYPEHTONS(eh->ether_type);
if (m->m_flags & M_BCAST) {
if (ifp->if_flags & IFF_LINK0) {
if (ifp->if_flags & IFF_LINK1)
bcastrif.tr_rcf = htons(RCF_ALLROUTES);
else
bcastrif.tr_rcf = htons(RCF_SINGLEROUTE);
rif = &bcastrif;
riflen = sizeof(bcastrif.tr_rcf);
}
}
break;
}
default:
printf("%s: can't handle af%d\n", ifp->if_xname,
dst->sa_family);
senderr(EAFNOSUPPORT);
}
if (mcopy)
(void) looutput(ifp, mcopy, dst, rt);
if (etype != 0) {
struct llc *l;
M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT);
if (m == 0)
senderr(ENOBUFS);
l = mtod(m, struct llc *);
l->llc_control = LLC_UI;
l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP;
l->llc_snap.org_code[0] = l->llc_snap.org_code[1] =
l->llc_snap.org_code[2] = 0;
bcopy((caddr_t) &etype, (caddr_t) &l->llc_snap.ether_type,
sizeof(u_short));
}
/*
* Add local net header. If no space in first mbuf,
* allocate another.
*/
M_PREPEND(m, (riflen + sizeof (*trh)), M_DONTWAIT);
if (m == 0)
senderr(ENOBUFS);
trh = mtod(m, struct token_header *);
trh->token_ac = TOKEN_AC;
trh->token_fc = TOKEN_FC;
bcopy((caddr_t)edst, (caddr_t)trh->token_dhost, sizeof (edst));
bcopy(LLADDR(ifp->if_sadl), (caddr_t)trh->token_shost,
sizeof(trh->token_shost));
if (riflen != 0) {
struct token_rif *trrif;
trh->token_shost[0] |= TOKEN_RI_PRESENT;
trrif = TOKEN_RIF(trh);
bcopy(rif, trrif, riflen);
}
send:
s = splimp();
/*
* Queue message on interface, and start output if interface
* not yet active.
*/
if (IF_QFULL(&ifp->if_snd)) {
IF_DROP(&ifp->if_snd);
splx(s);
senderr(ENOBUFS);
}
ifp->if_obytes += m->m_pkthdr.len;
if (m->m_flags & M_MCAST)
ifp->if_omcasts++;
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 token ring packet;
* the packet is in the mbuf chain m with
* the token ring header.
*/
static void
token_input(ifp, m)
struct ifnet *ifp;
struct mbuf *m;
{
struct ifqueue *inq;
struct llc *l;
struct token_header *trh;
int s, lan_hdr_len;
if ((ifp->if_flags & IFF_UP) == 0) {
m_freem(m);
return;
}
trh = mtod(m, struct token_header *);
ifp->if_lastchange = time;
ifp->if_ibytes += m->m_pkthdr.len;
if (bcmp((caddr_t)tokenbroadcastaddr, (caddr_t)trh->token_dhost,
sizeof(tokenbroadcastaddr)) == 0)
m->m_flags |= M_BCAST;
else if (trh->token_dhost[0] & 1)
m->m_flags |= M_MCAST;
if (m->m_flags & (M_BCAST|M_MCAST))
ifp->if_imcasts++;
/* Skip past the Token Ring header and RIF. */
lan_hdr_len = sizeof(struct token_header);
if (trh->token_shost[0] & TOKEN_RI_PRESENT) {
struct token_rif *trrif;
trrif = TOKEN_RIF(trh);
lan_hdr_len += (ntohs(trrif->tr_rcf) & TOKEN_RCF_LEN_MASK) >> 8;
}
m_adj(m, lan_hdr_len);
l = mtod(m, struct llc *);
switch (l->llc_dsap) {
#if defined(INET) || defined(NS) || defined(DECNET)
case LLC_SNAP_LSAP:
{
u_int16_t etype;
if (l->llc_control != LLC_UI || l->llc_ssap != LLC_SNAP_LSAP)
goto dropanyway;
if (l->llc_snap.org_code[0] != 0 ||
l->llc_snap.org_code[1] != 0 ||
l->llc_snap.org_code[2] != 0)
goto dropanyway;
etype = ntohs(l->llc_snap.ether_type);
m_adj(m, LLC_SNAPFRAMELEN);
switch (etype) {
#ifdef INET
case ETHERTYPE_IP:
schednetisr(NETISR_IP);
inq = &ipintrq;
break;
case ETHERTYPE_ARP:
schednetisr(NETISR_ARP);
inq = &arpintrq;
break;
#endif
#ifdef NS
case ETHERTYPE_NS:
schednetisr(NETISR_NS);
inq = &nsintrq;
break;
#endif
#ifdef DECNET
case ETHERTYPE_DECNET:
schednetisr(NETISR_DECNET);
inq = &decnetintrq;
break;
#endif
default:
/*
printf("token_input: unknown protocol 0x%x\n", etype);
*/
ifp->if_noproto++;
goto dropanyway;
}
break;
}
#endif /* INET || NS */
#ifdef ISO
case LLC_ISO_LSAP:
switch (l->llc_control) {
case LLC_UI:
/* LLC_UI_P forbidden in class 1 service */
if ((l->llc_dsap == LLC_ISO_LSAP) &&
(l->llc_ssap == LLC_ISO_LSAP)) {
/* LSAP for ISO */
m->m_data += 3; /* XXX */
m->m_len -= 3; /* XXX */
m->m_pkthdr.len -= 3; /* XXX */
M_PREPEND(m, sizeof *trh, M_DONTWAIT);
if (m == 0)
return;
*mtod(m, struct token_header *) = *trh;
#if defined(__FreeBSD__)
IFDEBUG(D_ETHER)
printf("clnp packet");
ENDDEBUG
#endif
schednetisr(NETISR_ISO);
inq = &clnlintrq;
break;
}
goto dropanyway;
case LLC_XID:
case LLC_XID_P:
if(m->m_len < ISO88025_ADDR_LEN)
goto dropanyway;
l->llc_window = 0;
l->llc_fid = 9;
l->llc_class = 1;
l->llc_dsap = l->llc_ssap = 0;
/* Fall through to */
case LLC_TEST:
case LLC_TEST_P:
{
struct sockaddr sa;
struct ether_header *eh;
int i;
u_char c = l->llc_dsap;
l->llc_dsap = l->llc_ssap;
l->llc_ssap = c;
if (m->m_flags & (M_BCAST | M_MCAST))
bcopy(LLADDR(ifp->if_sadl),
(caddr_t)trh->token_dhost,
ISO88025_ADDR_LEN);
sa.sa_family = AF_UNSPEC;
sa.sa_len = sizeof(sa);
eh = (struct ether_header *)sa.sa_data;
for (i = 0; i < ISO88025_ADDR_LEN; i++) {
eh->ether_shost[i] = c = trh->token_dhost[i];
eh->ether_dhost[i] =
eh->ether_dhost[i] = trh->token_shost[i];
eh->ether_shost[i] = c;
}
eh->ether_type = 0;
ifp->if_output(ifp, m, &sa, NULL);
return;
}
default:
m_freem(m);
return;
}
break;
#endif /* ISO */
#ifdef LLC
case LLC_X25_LSAP:
{
/*
* XXX check for source routing info ? (sizeof(struct sdl_hdr) and
* ISO88025_ADDR_LEN)
*/
M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT);
if (m == 0)
return;
if (!sdl_sethdrif(ifp, trh->token_shost, LLC_X25_LSAP,
trh->token_dhost, LLC_X25_LSAP,
ISO88025_ADDR_LEN,
mtod(m, struct sdl_hdr *)))
panic("ETHER cons addr failure");
mtod(m, struct sdl_hdr *)->sdlhdr_len =
m->m_pkthdr.len - sizeof(struct sdl_hdr);
#ifdef LLC_DEBUG
printf("llc packet\n");
#endif /* LLC_DEBUG */
schednetisr(NETISR_CCITT);
inq = &llcintrq;
break;
}
#endif /* LLC */
default:
/* printf("token_input: unknown dsap 0x%x\n", l->llc_dsap); */
ifp->if_noproto++;
dropanyway:
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
token_ifattach(ifp, lla)
struct ifnet *ifp;
caddr_t lla;
{
struct sockaddr_dl *sdl;
ifp->if_type = IFT_ISO88025;
ifp->if_addrlen = ISO88025_ADDR_LEN;
ifp->if_hdrlen = 14;
ifp->if_mtu = ISO88025_MTU;
ifp->if_output = token_output;
ifp->if_input = token_input;
ifp->if_broadcastaddr = tokenbroadcastaddr;
#ifdef IFF_NOTRAILERS
ifp->if_flags |= IFF_NOTRAILERS;
#endif
if ((sdl = ifp->if_sadl) != NULL && sdl->sdl_family == AF_LINK) {
sdl->sdl_type = IFT_ISO88025;
sdl->sdl_alen = ifp->if_addrlen;
bcopy(lla, LLADDR(sdl), ifp->if_addrlen);
}
}
void
token_ifdetach(ifp)
struct ifnet *ifp;
{
/* Nothing. */
}
Reference in New Issue View Git Blame Copy Permalink