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brought in drivers from David Greenman's (davidg@implode.rain.com) 

BPF package
This commit is contained in:
cgd 1993-03-24 23:54:19 +00:00
parent 9b4135471a
commit fe88b8df06
2 changed files with 341 additions and 141 deletions
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455
sys/arch/i386/isa/if_we.c
View File

@ -37,14 +37,13 @@
*
* PATCHES MAGIC LEVEL PATCH THAT GOT US HERE
* -------------------- ----- ----------------------
* CURRENT PATCH LEVEL: 1 00100
* CURRENT PATCH LEVEL: 3 00047
* -------------------- ----- ----------------------
*
* 09 Sep 92 Mike Durkin Fix Danpex EW-2016 & other 8013 clones
* enable with "options WECOMPAT"
* 19 Sep 92 Michael Galassi Fixed multiboard routing
* 20 Sep 92 Barry Lustig WD8013 16 bit mode -- enable
* with "options WD8013".
* with "option WD8013".
* 19 Sep 92 Michael Galassi Fixed multiboard routing
* 09 Sep 92 Mike Durkin Fix Danpex EW-2016 & other 8013 clones
*/
/*
@ -56,6 +55,20 @@
* Allowed interupt handler to look at unit other than 0
* Bdry was static, made it into an array w/ one entry per
* interface. nerd@percival.rain.com (Michael Galassi)
*
* BPF Packet Filter Support added by Marc Frajola, 12/30/92
* Input & other routines re-written by David Greenman, 1/2/93
* BPF trailer support added by David Greenman, 1/7/93
*
* $Log: if_we.c,v $
* Revision 1.3 1993/03/24 23:54:19 cgd
* brought in drivers from David Greenman's (davidg@implode.rain.com)
* BPF package
*
* Revision 1.2 93/02/18 17:21:57 davidg
* Bugs in mbuf cluster allocation fixed
* Problem with nfs wanting mbufs aligned on longword boundries fixed
*
*/
#include "we.h"
@ -77,6 +90,8 @@
#include "syslog.h"
#include "net/if.h"
#include "net/if_types.h"
#include "net/if_dl.h"
#include "net/netisr.h"
#ifdef INET
@ -92,10 +107,21 @@
#include "netns/ns_if.h"
#endif
#include "bpfilter.h"
#if NBPFILTER > 0
#include "net/bpf.h"
#include "net/bpfdesc.h"
#endif
#include "i386/isa/isa.h"
#include "i386/isa/if_wereg.h"
#include "i386/isa/isa_device.h"
#include "i386/isa/icu.h"
#if 0
#include "i386/include/pio.h"
#endif
static inline char *we_ring_copy();
/*
* This constant should really be 60 because the we adds 4 bytes of crc.
@ -121,6 +147,9 @@ struct we_softc {
u_char we_flags; /* software state */
#define WDF_RUNNING 0x01
#define WDF_TXBUSY 0x02
#if NBPFILTER > 0
#define WDF_ATTACHED 0x80
#endif
u_char we_type; /* interface type code */
u_short we_vector; /* interrupt vector */
@ -131,6 +160,7 @@ struct we_softc {
u_long we_vmem_size; /* card RAM bytes */
caddr_t we_vmem_ring; /* receive ring RAM vaddress */
caddr_t we_vmem_end; /* receive ring RAM end */
caddr_t we_bpf; /* Magic Cookie for BPF */
} we_softc[NWE];
int weprobe(), weattach(), weintr(), westart();
@ -263,6 +293,8 @@ weattach(is)
register struct we_softc *sc = &we_softc[is->id_unit];
register struct ifnet *ifp = &sc->we_if;
union we_command wecmd;
struct ifaddr *ifa;
struct sockaddr_dl *sdl;
wecmd.cs_byte = inb(sc->we_io_nic_addr + WD_P0_COMMAND);
wecmd.cs_stp = 1;
@ -283,12 +315,35 @@ weattach(is)
ifp->if_reset = wereset;
ifp->if_watchdog = wewatchdog;
if_attach(ifp);
/* Search down the ifa address list looking for the AF_LINK type entry */
ifa = ifp->if_addrlist;
while ((ifa != 0) &&
(ifa->ifa_addr != 0) &&
(ifa->ifa_addr->sa_family != AF_LINK))
{
ifa = ifa->ifa_next;
}
/* If we find an AF_LINK type entry, we well fill in the hardware addr */
if ((ifa != 0) &&
(ifa->ifa_addr != 0))
{
/* Fill in the link level address for this interface */
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
sdl->sdl_type = IFT_ETHER;
sdl->sdl_alen = ETHER_ADDR_LEN;
sdl->sdl_slen = 0;
bcopy(sc->we_addr, LLADDR(sdl), ETHER_ADDR_LEN);
}
#if NBPFILTER > 0
sc->we_flags &= ~WDF_ATTACHED; /* Make sure BPF attach flag clear */
#endif
/*
* Banner...
*/
printf(" %s address %s",
(sc->we_type & WD_ETHERNET) ? "ethernet" : "starlan",
printf(" %saddr %s",
(sc->we_type & WD_ETHERNET) ? "enet" : "slan",
ether_sprintf(sc->we_addr));
}
@ -329,9 +384,10 @@ westop(unit)
wewatchdog(unit) {
log(LOG_WARNING,"we%d: soft reset\n", unit);
weintr(unit);
/*log(LOG_WARNING,"we%d: soft reset\n", unit);
westop(unit);
weinit(unit);
weinit(unit);*/
}
static Bdry[NWE]; /* 19 Sep 92*/
@ -345,7 +401,15 @@ weinit(unit)
register struct ifnet *ifp = &sc->we_if;
union we_command wecmd;
int i, s;
#if NBPFILTER > 0
if ((sc->we_flags & WDF_ATTACHED) == 0) {
bpfattach(&sc->we_bpf, ifp, DLT_EN10MB,
sizeof(struct ether_header));
sc->we_flags |= WDF_ATTACHED;
}
#endif
/* address not known */
if (ifp->if_addrlist == (struct ifaddr *)0)
return;
@ -393,7 +457,13 @@ weinit(unit)
wecmd.cs_sta = 1;
wecmd.cs_rd = 0x4;
outb(sc->we_io_nic_addr + WD_P1_COMMAND, wecmd.cs_byte);
outb(sc->we_io_nic_addr + WD_P0_RCR, WD_R_CONFIG);
#if NBPFILTER > 0
if (sc->we_if.if_flags & IFF_PROMISC) {
outb(sc->we_io_nic_addr + WD_P0_RCR,
WD_R_PRO | WD_R_SEP | WD_R_AR | WD_R_CONFIG);
} else
#endif
outb(sc->we_io_nic_addr + WD_P0_RCR, WD_R_CONFIG);
/*
* Take the interface out of reset, program the vector,
@ -416,12 +486,13 @@ westart(ifp)
register caddr_t buffer;
int len, s;
union we_command wecmd;
/*
* The DS8390 has only one transmit buffer, if it is busy we
* must wait until the transmit interrupt completes.
*/
s = splhigh();
if (sc->we_flags & WDF_TXBUSY) {
(void) splx(s);
return;
@ -432,8 +503,72 @@ westart(ifp)
return;
}
sc->we_flags |= WDF_TXBUSY;
(void) splx(s);
#if NBPFILTER > 0
if (sc->we_bpf) {
u_short etype;
int off, datasize, resid;
struct ether_header *eh;
struct trailer_header {
u_short ether_type;
u_short ether_residual;
} trailer_header;
char ether_packet[ETHERMTU+100];
char *ep;
ep = ether_packet;
/*
* We handle trailers below:
* Copy ether header first, then residual data,
* then data. Put all this in a temporary buffer
* 'ether_packet' and send off to bpf. Since the
* system has generated this packet, we assume
* that all of the offsets in the packet are
* correct; if they're not, the system will almost
* certainly crash in m_copydata.
* We make no assumptions about how the data is
* arranged in the mbuf chain (i.e. how much
* data is in each mbuf, if mbuf clusters are
* used, etc.), which is why we use m_copydata
* to get the ether header rather than assume
* that this is located in the first mbuf.
*/
/* copy ether header */
m_copydata(m, 0, sizeof(struct ether_header), ep);
eh = (struct ether_header *) ep;
ep += sizeof(struct ether_header);
etype = ntohs(eh->ether_type);
if (etype >= ETHERTYPE_TRAIL &&
etype < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) {
datasize = ((etype - ETHERTYPE_TRAIL) << 9);
off = datasize + sizeof(struct ether_header);
/* copy trailer_header into a data structure */
m_copydata(m, off, sizeof(struct trailer_header),
&trailer_header.ether_type);
/* copy residual data */
m_copydata(m, off+sizeof(struct trailer_header),
resid = ntohs(trailer_header.ether_residual) -
sizeof(struct trailer_header), ep);
ep += resid;
/* copy data */
m_copydata(m, sizeof(struct ether_header), datasize, ep);
ep += datasize;
/* restore original ether packet type */
eh->ether_type = trailer_header.ether_type;
bpf_tap(sc->we_bpf, ether_packet, ep - ether_packet);
} else
bpf_mtap(sc->we_bpf, m);
}
#endif
/*
* Copy the mbuf chain into the transmit buffer
*/
@ -459,6 +594,7 @@ westart(ifp)
outb(sc->we_io_nic_addr + WD_P0_TBCR1, len >> 8);
wecmd.cs_txp = 1;
outb(sc->we_io_nic_addr + WD_P0_COMMAND, wecmd.cs_byte);
sc->we_if.if_timer = 3;
(void) splx(s);
}
@ -472,6 +608,7 @@ weintr(unit)
union we_command wecmd;
union we_interrupt weisr;
/* disable onboard interrupts, then get interrupt status */
wecmd.cs_byte = inb(sc->we_io_nic_addr + WD_P0_COMMAND);
wecmd.cs_ps = 0;
@ -567,10 +704,9 @@ werint(unit)
/* count includes CRC */
len = wer->we_count - 4;
if (len > 30 && len <= ETHERMTU+100
/*&& (*(char *)wer == 1 || *(char *) wer == 0x21)*/)
if (len > 30 && len <= ETHERMTU+100)
weread(sc, (caddr_t)(wer + 1), len);
else printf("reject %d", len);
else printf("we%d: reject - bad length %d", unit, len);
outofbufs:
wecmd.cs_byte = inb(sc->we_io_nic_addr + WD_P0_COMMAND);
@ -668,6 +804,13 @@ weioctl(ifp, cmd, data)
} else if (ifp->if_flags & IFF_UP &&
(ifp->if_flags & IFF_RUNNING) == 0)
weinit(ifp->if_unit);
#if NBPFILTER > 0
if (sc->we_if.if_flags & IFF_PROMISC) {
outb(sc->we_io_nic_addr + WD_P0_RCR,
WD_R_PRO | WD_R_SEP | WD_R_AR | WD_R_CONFIG);
} else
#endif
outb(sc->we_io_nic_addr + WD_P0_RCR, WD_R_CONFIG);
break;
#ifdef notdef
@ -702,11 +845,11 @@ wesetaddr(physaddr, unit)
weinit(unit);
}
#define wedataaddr(sc, eh, off, type) \
((type) ((caddr_t)((eh)+1)+(off) >= (sc)->we_vmem_end) ? \
(((caddr_t)((eh)+1)+(off))) - (sc)->we_vmem_end \
#define ringoffset(sc, eh, off, type) \
((type)( ((caddr_t)(eh)+(off) >= (sc)->we_vmem_end) ? \
(((caddr_t)(eh)+(off))) - (sc)->we_vmem_end \
+ (sc)->we_vmem_ring: \
((caddr_t)((eh)+1)+(off)))
((caddr_t)(eh)+(off)) ))
/*
* Pass a packet to the higher levels.
* We deal with the trailer protocol here.
@ -716,39 +859,124 @@ weread(sc, buf, len)
char *buf;
int len;
{
register struct ether_header *eh;
struct mbuf *m, *weget();
caddr_t we_ring_copy();
struct ether_header *eh;
struct mbuf *m, *head, *we_ring_to_mbuf();
int off, resid;
u_short etype;
struct trailer_header {
u_short trail_type;
u_short trail_residual;
} trailer_header;
++sc->we_if.if_ipackets;
/* Allocate a header mbuf */
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == 0)
goto bad;
m->m_pkthdr.rcvif = &sc->we_if;
m->m_pkthdr.len = len;
m->m_len = 0;
head = m;
/*
* Deal with trailer protocol: if type is trailer type
* get true type from first 16-bit word past data.
* Remember that type was trailer by setting off.
*/
eh = (struct ether_header *)buf;
eh->ether_type = ntohs((u_short)eh->ether_type);
if (eh->ether_type >= ETHERTYPE_TRAIL &&
eh->ether_type < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) {
off = (eh->ether_type - ETHERTYPE_TRAIL) * 512;
if (off >= ETHERMTU) return; /* sanity */
eh->ether_type = ntohs(*wedataaddr(sc, eh, off, u_short *));
resid = ntohs(*(wedataaddr(sc, eh, off+2, u_short *)));
if (off + resid > len) return; /* sanity */
len = off + resid;
} else off = 0;
len -= sizeof(struct ether_header);
if (len <= 0) return;
#define EROUND ((sizeof(struct ether_header) + 3) & ~3)
#define EOFF (EROUND - sizeof(struct ether_header))
/*
* Pull packet off interface. Off is nonzero if packet
* has trailing header; neget will then force this header
* information to be at the front, but we still have to drop
* the type and length which are at the front of any trailer data.
* The following assumes there is room for
* the ether header in the header mbuf
*/
m = weget(buf, len, off, &sc->we_if, sc);
if (m == 0) return;
ether_input(&sc->we_if, eh, m);
head->m_data += EOFF;
bcopy(buf, mtod(head, caddr_t), sizeof(struct ether_header));
buf += sizeof(struct ether_header);
head->m_len += sizeof(struct ether_header);
len -= sizeof(struct ether_header);
etype = ntohs((u_short)eh->ether_type);
/*
* Deal with trailer protocol:
* If trailer protocol, calculate the datasize as 'off',
* which is also the offset to the trailer header.
* Set resid to the amount of packet data following the
* trailer header.
* Finally, copy residual data into mbuf chain.
*/
if (etype >= ETHERTYPE_TRAIL &&
etype < ETHERTYPE_TRAIL+ETHERTYPE_NTRAILER) {
off = (etype - ETHERTYPE_TRAIL) << 9;
if ((off + sizeof(struct trailer_header)) > len)
goto bad; /* insanity */
eh->ether_type = *ringoffset(sc, buf, off, u_short *);
resid = ntohs(*ringoffset(sc, buf, off+2, u_short *));
if ((off + resid) > len) goto bad; /* insanity */
resid -= sizeof(struct trailer_header);
if (resid < 0) goto bad; /* insanity */
m = we_ring_to_mbuf(sc, ringoffset(sc, buf, off+4, char *), head, resid);
if (m == 0) goto bad;
len = off;
head->m_pkthdr.len -= 4; /* subtract trailer header */
}
/*
* Pull packet off interface. Or if this was a trailer packet,
* the data portion is appended.
*/
m = we_ring_to_mbuf(sc, buf, m, len);
if (m == 0) goto bad;
#if NBPFILTER > 0
/*
* Check if there's a bpf filter listening on this interface.
* If so, hand off the raw packet to bpf.
*/
if (sc->we_bpf) {
bpf_mtap(sc->we_bpf, head);
}
/*
* Note that the interface cannot be in promiscuous mode if
* there are no bpf listeners. And if we are in promiscuous
* mode, we have to check if this packet is really ours.
*
* XXX This test does not support multicasts.
*/
if ((sc->we_if.if_flags & IFF_PROMISC) &&
bcmp(eh->ether_dhost, sc->we_addr,
sizeof(eh->ether_dhost)) != 0 &&
bcmp(eh->ether_dhost, etherbroadcastaddr,
sizeof(eh->ether_dhost)) != 0) {
m_freem(head);
return;
}
#endif
/*
* Fix up data start offset in mbuf to point past ether header
*/
m_adj(head, sizeof(struct ether_header));
/*
* silly ether_input routine needs 'type' in host byte order
*/
eh->ether_type = ntohs(eh->ether_type);
ether_input(&sc->we_if, eh, head);
return;
bad: if (head)
m_freem(head);
return;
}
/*
@ -756,94 +984,75 @@ weread(sc, buf, len)
*/
/*
* Pull read data off a interface.
* Len is length of data, with local net header stripped.
* Off is non-zero if a trailer protocol was used, and
* gives the offset of the trailer information.
* We copy the trailer information and then all the normal
* data into mbufs. When full cluster sized units are present
* we copy into clusters.
* Copy data from receive buffer to end of mbuf chain
* allocate additional mbufs as needed. return pointer
* to last mbuf in chain.
* sc = we info
* src = pointer in we ring buffer
* dst = pointer to last mbuf in mbuf chain to copy to
* amount = amount of data to copy
*/
struct mbuf *
weget(buf, totlen, off0, ifp, sc)
caddr_t buf;
int totlen, off0;
struct ifnet *ifp;
we_ring_to_mbuf(sc,src,dst,total_len)
struct we_softc *sc;
char *src;
struct mbuf *dst;
int total_len;
{
struct mbuf *top, **mp, *m, *p;
int off = off0, len;
register caddr_t cp = buf;
char *epkt;
int tc =totlen;
register struct mbuf *m = dst;
buf += sizeof(struct ether_header);
cp = buf;
epkt = cp + totlen;
while (total_len > 0) {
register int amount = min(total_len, M_TRAILINGSPACE(m));
if (off) {
cp += off + 2 * sizeof(u_short);
totlen -= 2 * sizeof(u_short);
}
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == 0)
return (0);
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = totlen;
m->m_len = MHLEN;
top = 0;
mp = &top;
while (totlen > 0) {
if (top) {
MGET(m, M_DONTWAIT, MT_DATA);
if (m == 0) {
m_freem(top);
return (0);
}
m->m_len = MLEN;
}
len = min(totlen, epkt - cp);
if (len >= MINCLSIZE) {
MCLGET(m, M_DONTWAIT);
if (m->m_flags & M_EXT)
m->m_len = len = min(len, MCLBYTES);
else
len = m->m_len;
} else {
if (amount == 0) { /* no more data in this mbuf, alloc another */
/*
* Place initial small packet/header at end of mbuf.
*/
if (len < m->m_len) {
if (top == 0 && len + max_linkhdr <= m->m_len)
m->m_data += max_linkhdr;
m->m_len = len;
} else
len = m->m_len;
* if there is enough data for an mbuf cluster, attempt
* to allocate one of those, otherwise, a regular mbuf
* will do.
*/
dst = m;
MGET(m, M_DONTWAIT, MT_DATA);
if (m == 0)
return (0);
if (total_len >= MINCLSIZE)
MCLGET(m, M_DONTWAIT);
m->m_len = 0;
dst->m_next = m;
amount = min(total_len, M_TRAILINGSPACE(m));
}
totlen -= len;
/* only do up to end of buffer */
if (cp+len > sc->we_vmem_end) {
unsigned toend = sc->we_vmem_end - cp;
src = we_ring_copy(sc, src, mtod(m, caddr_t) + m->m_len, amount);
m->m_len += amount;
total_len -= amount;
bcopy(cp, mtod(m, caddr_t), toend);
cp = sc->we_vmem_ring;
bcopy(cp, mtod(m, caddr_t)+toend, len - toend);
cp += len - toend;
epkt = cp + totlen;
} else {
bcopy(cp, mtod(m, caddr_t), (unsigned)len);
cp += len;
}
*mp = m;
mp = &m->m_next;
if (cp == epkt) {
cp = buf;
epkt = cp + tc;
}
}
return (top);
return (m);
}
static inline char *
we_ring_copy(sc,src,dst,amount)
struct we_softc *sc;
char *src;
char *dst;
int amount;
{
int tmp_amount;
/* does copy wrap to lower addr in ring buffer? */
if (src + amount > sc->we_vmem_end) {
tmp_amount = sc->we_vmem_end - src;
bcopy(src,dst,tmp_amount); /* copy amount up to end */
amount -= tmp_amount;
src = sc->we_vmem_ring;
dst += tmp_amount;
}
bcopy(src, dst, amount);
return(src + amount);
}
#endif

27
sys/arch/i386/isa/if_wereg.h
View File

@ -34,14 +34,6 @@
* SUCH DAMAGE.
*
* @(#)if_wereg.h 7.1 (Berkeley) 5/9/91
*
* PATCHES MAGIC LEVEL PATCH THAT GOT US HERE
* -------------------- ----- ----------------------
* CURRENT PATCH LEVEL: 1 00100
* -------------------- ----- ----------------------
*
* 20 Sep 92 Barry Lustig WD8013 16 bit mode -- enable
* with "options WD8013".
*/
/*
@ -63,22 +55,21 @@ union we_mem_sel {
u_char ms_byte; /* entire byte */
};
/* 20 Sep 92*/
/*
* LA Address Register (LAAR)
*/
union we_laar {
struct lan_addr_reg {
u_char addr_l19_b:1, /* Address Line 19 for enabling */
/* 16 bit NIC access to shared RAM */
unused_b:5, /* unused (or unknown) bits */
lan_16_en_b:1, /* Enables 16bit shrd RAM for LAN */
mem_16_en_b:1; /* Enables 16bit shrd RAM for host */
} laar_decode;
struct lan_addr_reg {
u_char addr_l19_b:1, /* Address Line 19 for enabling */
/* 16 bit NIC access to shared RAM */
unused_b:5, /* unused (or unknown) bits */
lan_16_en_b:1, /* Enables 16bit shrd RAM for LAN */
mem_16_en_b:1; /* Enables 16bit shrd RAM for host */
} laar_decode;
#define addr_l19 laar_decode.addr_l19_b
#define lan_16_en laar_decode.lan_16_en_b
#define mem_16_en laar_decode.mem_16_en_b
u_char laar_byte; /* entire byte */
u_char laar_byte; /* entire byte */
};
/*
@ -261,7 +252,7 @@ union wet_status {
#define WD_D_FT1 0x40 /* Fifo Threshold Select */
#define WD_D_RES 0x80 /* reserved... */
#define WD_D_CONFIG (WD_D_FT1|WD_D_BMS)
#define WD_D_CONFIG16 (WD_D_FT1|WD_D_BMS|WD_D_LAS|WD_D_WTS) /* 20 Sep 92*/
#define WD_D_CONFIG16 (WD_D_FT1|WD_D_BMS|WD_D_LAS|WD_D_WTS)
/*
* Configuration constants (interrupt mask register)