1
0
mirror of https://git.FreeBSD.org/src.git synced 2024-12-24 11:29:10 +00:00
freebsd/sys/i386/isa/if_cx.c
1995-05-30 08:16:23 +00:00

818 lines
20 KiB
C

/*
* Cronyx-Sigma adapter driver for FreeBSD.
* Supports PPP/HDLC and Cisco/HDLC protocol in synchronous mode,
* and asyncronous channels with full modem control.
* Keepalive protocol implemented in both Cisco and PPP modes.
*
* Copyright (C) 1994 Cronyx Ltd.
* Author: Serge Vakulenko, <vak@zebub.msk.su>
*
* This software is distributed with NO WARRANTIES, not even the implied
* warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Authors grant any other persons or organisations permission to use
* or modify this software as long as this message is kept with the software,
* all derivative works or modified versions.
*
* Version 1.2, Tue Nov 22 18:57:27 MSK 1994
*/
#undef DEBUG
#include "cx.h"
#if NCX > 0
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/conf.h>
#include <sys/errno.h>
#include <net/if.h>
#include <net/if_types.h>
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
#ifdef __FreeBSD__
# include <i386/isa/isa_device.h>
# if __FreeBSD__ < 2
# include <machine/pio.h>
# else
# include <sys/devconf.h>
# endif
# define init_func_t void(*)(int)
# define watchdog_func_t void(*)(int)
# define start_func_t void(*)(struct ifnet*)
#endif
#ifdef __bsdi__
# if INET
# include <netinet/in.h>
# include <netinet/in_systm.h>
# include <netinet/ip.h>
# endif
# include <sys/device.h>
# include <i386/isa/isavar.h>
# include <i386/isa/icu.h>
# include <machine/inline.h>
# include <net/if_slvar.h>
# include <net/if_p2p.h>
# define timeout_func_t void(*)()
# define init_func_t int(*)()
# define watchdog_func_t int(*)()
# define start_func_t int(*)()
struct cxsoftc {
struct device dev; /* base device */
struct isadev isadev; /* ISA device */
struct intrhand intr; /* interrupt vectoring */
};
#endif
#include <net/if_sppp.h>
#include <machine/cronyx.h>
#include <i386/isa/cxreg.h>
#ifdef DEBUG
# define print(s) printf s
#else
# define print(s) /*void*/
#endif
#define TXTIMEOUT 2 /* transmit timeout in seconds */
#define DMABUFSZ (6*256) /* buffer size */
#define PPP_HEADER_LEN 4 /* size of PPP header */
/*
* Under BSDI it's possible to use general p2p protocol scheme,
* as well as our own one. Switching is done via IFF_ALTPHYS flag.
* Our ifnet pointer holds the buffer large enough to contain
* any of sppp and p2p structures.
*/
#ifdef __bsdi__
# define SPPPSZ (sizeof (struct sppp))
# define P2PSZ (sizeof (struct p2pcom))
# define IFSTRUCTSZ (SPPPSZ>P2PSZ ? SPPPSZ : P2PSZ)
#else
# define IFSTRUCTSZ (sizeof (struct sppp))
#endif
#define IFNETSZ (sizeof (struct ifnet))
int cxoutput (struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rt);
int cxsioctl (struct ifnet *ifp, int cmd, caddr_t data);
void cxinit (int unit);
void cxstart (struct ifnet *ifp);
void cxwatchdog (int unit);
void cxinput (cx_chan_t *c, void *buf, unsigned len);
int cxrinta (cx_chan_t *c);
void cxtinta (cx_chan_t *c);
void cxmint (cx_chan_t *c);
void cxtimeout (caddr_t a);
cx_board_t cxboard [NCX]; /* adapter state structures */
cx_chan_t *cxchan [NCX*NCHAN]; /* unit to channel struct pointer */
static unsigned short irq_valid_values [] = { 3, 5, 7, 10, 11, 12, 15, 0 };
static unsigned short drq_valid_values [] = { 5, 6, 7, 0 };
static unsigned short port_valid_values [] = {
0x240, 0x260, 0x280, 0x300, 0x320, 0x380, 0x3a0, 0,
};
#if __FreeBSD__ >= 2
static char cxdescription [80];
struct kern_devconf kdc_cx [NCX] = { {
0, 0, 0, "cx", 0, { MDDT_ISA, 0, "net" },
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN, &kdc_isa0, 0,
DC_IDLE, cxdescription, DC_CLS_SERIAL
} };
#endif
/*
* Check that the value is contained in the list of correct values.
*/
static int valid (unsigned short value, unsigned short *list)
{
while (*list)
if (value == *list++)
return (1);
return (0);
}
/*
* Print the mbuf chain, for debug purposes only.
*/
static void printmbuf (struct mbuf *m)
{
printf ("mbuf:");
for (; m; m=m->m_next) {
if (m->m_flags & M_PKTHDR)
printf (" HDR %d:", m->m_pkthdr.len);
if (m->m_flags & M_EXT)
printf (" EXT:");
printf (" %d", m->m_len);
}
printf ("\n");
}
/*
* Make an mbuf from data.
*/
static struct mbuf *makembuf (void *buf, unsigned len)
{
struct mbuf *m, *o, *p;
MGETHDR (m, M_DONTWAIT, MT_DATA);
if (! m)
return (0);
if (len >= MINCLSIZE)
MCLGET (m, M_DONTWAIT);
m->m_pkthdr.len = len;
m->m_len = 0;
p = m;
while (len) {
unsigned n = M_TRAILINGSPACE (p);
if (n > len)
n = len;
if (! n) {
/* Allocate new mbuf. */
o = p;
MGET (p, M_DONTWAIT, MT_DATA);
if (! p) {
m_freem (m);
return (0);
}
if (len >= MINCLSIZE)
MCLGET (p, M_DONTWAIT);
p->m_len = 0;
o->m_next = p;
n = M_TRAILINGSPACE (p);
if (n > len)
n = len;
}
bcopy (buf, mtod (p, caddr_t) + p->m_len, n);
p->m_len += n;
buf += n;
len -= n;
}
return (m);
}
/*
* Test the presence of the adapter on the given i/o port.
*/
#ifdef __FreeBSD__
int cxprobe (struct isa_device *id)
{
int unit = id->id_unit;
int iobase = id->id_iobase;
int irq = id->id_irq;
int drq = id->id_drq;
int irqnum;
#endif
#ifdef __bsdi__
int cxprobe (struct device *parent, struct cfdata *cf, void *aux)
{
int unit = cf->cf_unit;
int iobase = ((struct isa_attach_args*)aux)->ia_iobase;
int irq = ((struct isa_attach_args*)aux)->ia_irq;
int drq = ((struct isa_attach_args*)aux)->ia_drq;
int irqnum, i;
for (i=0; i<NCX; ++i)
if (i != unit && cxboard[i].port == iobase)
return (0);
if (irq == IRQUNK) {
irq = isa_irqalloc (IRQ3|IRQ5|IRQ7|IRQ10|IRQ11|IRQ12|IRQ15);
if (! irq)
return (0);
((struct isa_attach_args*)aux)->ia_irq = irq;
}
#endif
irqnum = ffs (irq) - 1;
print (("cx%d: probe iobase=0x%x irq=%d drq=%d\n",
unit, iobase, irqnum, drq));
if (! valid (irqnum, irq_valid_values)) {
printf ("cx%d: Incorrect IRQ: %d\n", unit, irqnum);
return (0);
}
if (! valid (iobase, port_valid_values)) {
printf ("cx%d: Incorrect port address: 0x%x\n", unit, iobase);
return (0);
}
if (! valid (drq, drq_valid_values)) {
printf ("cx%d: Incorrect DMA channel: %d\n", unit, drq);
return (0);
}
if (! cx_probe_board (iobase))
return (0);
return (1);
}
/*
* The adapter is present, initialize the driver structures.
*/
#ifdef __FreeBSD__
int cxattach (struct isa_device *id)
{
int unit = id->id_unit;
int iobase = id->id_iobase;
int irq = id->id_irq;
int drq = id->id_drq;
#endif
#ifdef __bsdi__
void cxattach (struct device *parent, struct device *self, void *aux)
{
int unit = self->dv_unit;
int iobase = ((struct isa_attach_args*)aux)->ia_iobase;
int irq = ((struct isa_attach_args*)aux)->ia_irq;
int drq = ((struct isa_attach_args*)aux)->ia_drq;
struct cxsoftc *sc = (struct cxsoftc*) self;
void cxintr (cx_board_t *b);
#endif
cx_board_t *b = cxboard + unit;
int i;
/* Initialize the board structure. */
cx_init (b, unit, iobase, ffs(irq)-1, drq);
for (i=0; i<NCHAN; ++i) {
cx_chan_t *c = b->chan + i;
int u = b->num*NCHAN + i;
cxchan[u] = c;
if (c->type == T_NONE)
continue;
/* Allocate the buffer memory. */
c->arbuf = malloc (DMABUFSZ, M_DEVBUF, M_NOWAIT);
c->brbuf = malloc (DMABUFSZ, M_DEVBUF, M_NOWAIT);
c->atbuf = malloc (DMABUFSZ, M_DEVBUF, M_NOWAIT);
c->btbuf = malloc (DMABUFSZ, M_DEVBUF, M_NOWAIT);
/* All buffers should be located in lower 16M of memory! */
if (!c->arbuf || !c->brbuf || !c->atbuf || !c->btbuf) {
printf ("cx%d.%d: No memory for channel buffers\n",
c->board->num, c->num);
c->type = T_NONE;
}
switch (c->type) {
case T_SYNC_RS232:
case T_SYNC_V35:
case T_SYNC_RS449:
case T_UNIV_RS232:
case T_UNIV_RS449:
case T_UNIV_V35:
c->ifp = malloc (IFSTRUCTSZ, M_DEVBUF, M_NOWAIT);
if (! c->ifp) {
printf ("cx%d.%d: No memory for ifnet buffer\n",
c->board->num, c->num);
c->type = T_NONE;
continue;
}
c->ifp->if_unit = u;
c->ifp->if_name = "cx";
c->ifp->if_mtu = PP_MTU;
c->ifp->if_flags = IFF_POINTOPOINT|IFF_MULTICAST;
c->ifp->if_ioctl = cxsioctl;
c->ifp->if_start = (start_func_t) cxstart;
c->ifp->if_watchdog = (watchdog_func_t) cxwatchdog;
/* Init routine is never called by upper level? */
c->ifp->if_init = (init_func_t) cxinit;
sppp_attach (c->ifp);
if_attach (c->ifp);
#if NBPFILTER > 0
/* If BPF is in the kernel, call the attach for it. */
bpfattach (&c->bpf, c->ifp, DLT_PPP, PPP_HEADER_LEN);
#endif
}
}
/* Reset the adapter. */
cx_setup_board (b);
/* Activate the timeout routine. */
if (unit == 0)
timeout ((timeout_func_t) cxtimeout, 0, hz*5);
#if __FreeBSD__ >= 2
if (unit != 0)
kdc_cx[unit] = kdc_cx[0];
kdc_cx[unit].kdc_unit = unit;
kdc_cx[unit].kdc_isa = id;
sprintf (cxdescription, "Cronyx-Sigma-%s sync/async serial adapter",
b->name);
dev_attach (&kdc_cx[unit]);
#endif
#ifdef __FreeBSD__
printf ("cx%d: <Cronyx-%s>\n", unit, b->name);
return (1);
#endif
#ifdef __bsdi__
printf (": <Cronyx-%s>\n", b->name);
isa_establish (&sc->isadev, &sc->dev);
sc->intr.ih_fun = (int(*)()) cxintr;
sc->intr.ih_arg = (void*) b;
intr_establish (irq, &sc->intr, DV_NET);
#endif
}
#ifdef __FreeBSD__
struct isa_driver cxdriver = { cxprobe, cxattach, "cx" };
#endif
#ifdef __bsdi__
struct cfdriver cxcd = { 0, "cx", cxprobe, cxattach, sizeof (struct cxsoftc) };
#endif
/*
* Process an ioctl request.
*/
int cxsioctl (struct ifnet *ifp, int cmd, caddr_t data)
{
cx_chan_t *c = cxchan[ifp->if_unit];
int error, s;
if (c->type==T_NONE || c->mode==M_ASYNC)
return (EINVAL);
#ifdef __bsdi__
if (c->sopt.ext) {
/* Save RUNNING flag. */
int running = (ifp->if_flags & IFF_RUNNING);
error = p2p_ioctl (ifp, cmd, data);
ifp->if_flags &= ~IFF_RUNNING;
ifp->if_flags |= running;
} else
#endif
error = sppp_ioctl (ifp, cmd, data);
if (error)
return (error);
if (cmd != SIOCSIFFLAGS)
return (0);
s = splimp ();
if (! (ifp->if_flags & IFF_UP) && (ifp->if_flags & IFF_RUNNING))
/* Interface is down and running -- stop it. */
cxinit (ifp->if_unit);
else if ((ifp->if_flags & IFF_UP) && ! (ifp->if_flags & IFF_RUNNING))
/* Interface is up and not running -- start it. */
cxinit (ifp->if_unit);
splx (s);
return (0);
}
/*
* Initialization of interface.
*/
void cxinit (int unit)
{
cx_chan_t *c = cxchan[unit];
unsigned short port = c->chip->port;
int s;
print (("cx%d.%d: cxinit\n", c->board->num, c->num));
/* Disable interrupts */
s = splimp();
/* Reset the channel (for sync modes only) */
if (c->ifp->if_flags & IFF_OACTIVE) {
outb (CAR(port), c->num & 3);
outb (STCR(port), STC_ABORTTX | STC_SNDSPC);
}
cx_setup_chan (c);
c->ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
if (c->ifp->if_flags & IFF_UP) {
/* The interface is up, start it */
c->ifp->if_flags |= IFF_RUNNING;
#if __FreeBSD__ >= 2
/* Mark the board busy on the first startup.
* Never goes idle. */
kdc_cx[c->board->num].kdc_state = DC_BUSY;
#endif
/* Initialize channel, enable receiver and transmitter */
cx_cmd (port, CCR_INITCH | CCR_ENRX | CCR_ENTX);
/* Repeat the command, to avoid the rev.H bug */
cx_cmd (port, CCR_INITCH | CCR_ENRX | CCR_ENTX);
/* Start receiver */
outw (ARBCNT(port), DMABUFSZ);
outb (ARBSTS(port), BSTS_OWN24);
outw (BRBCNT(port), DMABUFSZ);
outb (BRBSTS(port), BSTS_OWN24);
/* Raise DTR and RTS */
cx_chan_dtr (c, 1);
cx_chan_rts (c, 1);
/* Enable interrupts */
outb (IER(port), IER_RXD | IER_TXD);
cxstart (c->ifp);
} else if (! c->sopt.ext)
/* Flush the interface output queue, if it is down */
sppp_flush (c->ifp);
splx (s);
}
/*
* Fill transmitter buffer with data.
*/
void cxput (cx_chan_t *c, char b)
{
struct mbuf *m;
unsigned char *buf;
unsigned short port = c->chip->port, len, cnt_port, sts_port;
/* Choose the buffer. */
if (b == 'A') {
buf = c->atbuf;
cnt_port = ATBCNT(port);
sts_port = ATBSTS(port);
} else {
buf = c->btbuf;
cnt_port = BTBCNT(port);
sts_port = BTBSTS(port);
}
/* Is it busy? */
if (inb (sts_port) & BSTS_OWN24) {
c->ifp->if_flags |= IFF_OACTIVE;
return;
}
/* Get the packet to send. */
#ifdef __bsdi__
if (c->sopt.ext) {
struct p2pcom *p = (struct p2pcom*) c->ifp;
int s = splimp ();
IF_DEQUEUE (&p->p2p_isnd, m)
if (! m)
IF_DEQUEUE (&c->ifp->if_snd, m)
splx (s);
} else
#endif
m = sppp_dequeue (c->ifp);
if (! m)
return;
len = m->m_pkthdr.len;
if (len >= DMABUFSZ) {
printf ("cx%d.%d: too long packet: %d bytes\n",
c->board->num, c->num, len);
printmbuf (m);
m_freem (m);
return;
}
m_copydata (m, 0, len, buf);
#if NBPFILTER > 0
if (c->bpf)
bpf_mtap (c->bpf, m);
#endif
m_freem (m);
/* Start transmitter. */
outw (cnt_port, len);
outb (sts_port, BSTS_EOFR | BSTS_INTR | BSTS_OWN24);
#ifdef DEBUG
if (c->ifp->if_flags & IFF_DEBUG)
printf ("cx%d.%d: enqueue %d bytes to %c\n",
c->board->num, c->num, len, buf==c->atbuf ? 'A' : 'B');
#endif
c->ifp->if_flags |= IFF_OACTIVE;
}
/*
* Start output on interface. Get another datagram to send
* off of the interface queue, and copy it to the interface
* before starting the output.
*/
void cxstart (struct ifnet *ifp)
{
cx_chan_t *c = cxchan[ifp->if_unit];
unsigned short port = c->chip->port;
/* No output if the interface is down. */
if (! (ifp->if_flags & IFF_RUNNING))
return;
/* Set the current channel number. */
outb (CAR(port), c->num & 3);
/* Determine the buffer order. */
if (inb (DMABSTS(port)) & DMABSTS_NTBUF) {
cxput (c, 'B');
cxput (c, 'A');
} else {
cxput (c, 'A');
cxput (c, 'B');
}
/* Set up transmit timeout. */
if (c->ifp->if_flags & IFF_OACTIVE)
c->ifp->if_timer = TXTIMEOUT;
/*
* Enable TXMPTY interrupt,
* to catch the case when the second buffer is empty.
*/
if ((inb (ATBSTS(port)) & BSTS_OWN24) &&
(inb (BTBSTS(port)) & BSTS_OWN24)) {
outb (IER(port), IER_RXD | IER_TXD | IER_TXMPTY);
} else
outb (IER(port), IER_RXD | IER_TXD);
}
/*
* Handle transmit timeouts.
* Recover after lost transmit interrupts.
*/
void cxwatchdog (int unit)
{
cx_chan_t *c = cxchan[unit];
if (c->ifp->if_flags & IFF_OACTIVE) {
c->ifp->if_flags &= ~IFF_OACTIVE;
cxstart (c->ifp);
}
}
/*
* Handle receive interrupts, including receive errors and
* receive timeout interrupt.
*/
void cxrinth (cx_chan_t *c)
{
unsigned short port = c->chip->port;
unsigned short len, risr = inw (RISR(port));
print (("cx%d.%d: hdlc receive interrupt, risr=%b, arbsts=%b, brbsts=%b\n",
c->board->num, c->num, risr, RISH_BITS,
inb (ARBSTS(port)), BSTS_BITS, inb (BRBSTS(port)), BSTS_BITS));
/* Receive errors. */
if (risr & (RIS_BUSERR | RIS_OVERRUN | RISH_CRCERR | RISH_RXABORT)) {
if (c->ifp->if_flags & IFF_DEBUG)
printf ("cx%d.%d: receive error, risr=%b\n",
c->board->num, c->num, risr, RISH_BITS);
++c->ifp->if_ierrors;
if (risr & RIS_OVERRUN)
++c->ifp->if_collisions;
} else if (risr & RIS_EOBUF) {
/* Handle received data. */
len = (risr & RIS_BB) ? inw(BRBCNT(port)) : inw(ARBCNT(port));
if (len > DMABUFSZ) {
/* Fatal error: actual DMA transfer size
* exceeds our buffer size. It could be caused
* by incorrectly programmed DMA register or
* hardware fault. Possibly, should panic here. */
printf ("cx%d.%d: panic! DMA buffer overflow: %d bytes\n",
c->board->num, c->num, len);
++c->ifp->if_ierrors;
} else if (! (risr & RIS_EOFR)) {
/* The received frame does not fit in the DMA buffer.
* It could be caused by serial lie noise,
* or if the peer has too big MTU. */
if (c->ifp->if_flags & IFF_DEBUG)
printf ("cx%d.%d: received frame length exceeds MTU, risr=%b\n",
c->board->num, c->num, risr, RISH_BITS);
++c->ifp->if_ierrors;
} else {
/* Valid frame received. */
print (("cx%d.%d: HDLC: %d bytes received\n",
c->board->num, c->num, len));
cxinput (c, (risr & RIS_BB) ? c->brbuf : c->arbuf, len);
++c->ifp->if_ipackets;
}
}
/* Restart receiver. */
if (! (inb (ARBSTS(port)) & BSTS_OWN24)) {
outw (ARBCNT(port), DMABUFSZ);
outb (ARBSTS(port), BSTS_OWN24);
}
if (! (inb (BRBSTS(port)) & BSTS_OWN24)) {
outw (BRBCNT(port), DMABUFSZ);
outb (BRBSTS(port), BSTS_OWN24);
}
}
/*
* Handle transmit interrupt.
*/
int cxtinth (cx_chan_t *c)
{
unsigned short port = c->chip->port;
unsigned char tisr = inb (TISR(port));
unsigned char teoir = 0;
print (("cx%d.%d: hdlc transmit interrupt, tisr=%b, atbsts=%b, btbsts=%b\n",
c->board->num, c->num, tisr, TIS_BITS,
inb (ATBSTS(port)), BSTS_BITS, inb (BTBSTS(port)), BSTS_BITS));
if (tisr & (TIS_BUSERR | TIS_UNDERRUN)) {
if (c->ifp->if_flags & IFF_DEBUG)
printf ("cx%d.%d: transmit error, tisr=%b\n",
c->board->num, c->num, tisr, TIS_BITS);
++c->ifp->if_oerrors;
/* Terminate the failed buffer. */
teoir |= TEOI_TERMBUFF;
} else if (tisr & (TIS_EOFR))
++c->ifp->if_opackets;
c->ifp->if_flags &= ~IFF_OACTIVE;
cxstart (c->ifp);
return (teoir);
}
#ifdef __FreeBSD__
void cxintr (int bnum)
{
cx_board_t *b = cxboard + bnum;
#endif
#ifdef __bsdi__
void cxintr (cx_board_t *b)
{
#endif
while (! (inw (BSR(b->port)) & BSR_NOINTR)) {
/* Acknowledge the interrupt to enter the interrupt context. */
/* Read the local interrupt vector register. */
unsigned char livr = inb (IACK(b->port, BRD_INTR_LEVEL));
cx_chan_t *c = b->chan + (livr>>2 & 0xf);
unsigned short port = c->chip->port;
unsigned short eoiport = REOIR(port);
unsigned char eoi = 0;
if (c->type == T_NONE) {
printf ("cx%d.%d: unexpected interrupt, livr=0x%x\n",
c->board->num, c->num, livr);
continue; /* incorrect channel number? */
}
/* print (("cx%d.%d: interrupt, livr=0x%x\n",
c->board->num, c->num, livr)); */
/* Clear RTS to stop receiver data flow while we are busy
* processing the interrupt, thus avoiding underruns. */
if (! c->sopt.norts) {
outb (MSVR_RTS(port), 0);
c->rts = 0;
}
switch (livr & 3) {
case LIV_EXCEP: /* receive exception */
case LIV_RXDATA: /* receive interrupt */
switch (c->mode) {
case M_ASYNC: eoi = cxrinta (c); break;
case M_HDLC: cxrinth (c); break;
default:; /* No bisync and X.21 yet */
}
break;
case LIV_TXDATA: /* transmit interrupt */
eoiport = TEOIR(port);
switch (c->mode) {
case M_ASYNC: cxtinta (c); break;
case M_HDLC: eoi = cxtinth (c); break;
default:; /* No bisync and X.21 yet */
}
break;
case LIV_MODEM: /* modem/timer interrupt */
eoiport = MEOIR(port);
cxmint (c);
break;
}
/* Raise RTS for this channel if and only if
* both receive buffers are empty. */
if (! c->sopt.norts && (inb (CSR(port)) & CSRA_RXEN) &&
(inb (ARBSTS(port)) & BSTS_OWN24) &&
(inb (BRBSTS(port)) & BSTS_OWN24)) {
outb (MSVR_RTS(port), MSV_RTS);
c->rts = 1;
}
/* Exit from interrupt context. */
outb (eoiport, eoi);
}
}
/*
* Process the received packet.
*/
void cxinput (cx_chan_t *c, void *buf, unsigned len)
{
/* Make an mbuf. */
struct mbuf *m = makembuf (buf, len);
if (! m) {
if (c->ifp->if_flags & IFF_DEBUG)
printf ("cx%d.%d: no memory for packet\n",
c->board->num, c->num);
++c->ifp->if_iqdrops;
return;
}
m->m_pkthdr.rcvif = c->ifp;
#ifdef DEBUG
printmbuf (m);
#endif
#if NBPFILTER > 0
/*
* Check if there's a BPF listener on this interface.
* If so, hand off the raw packet to bpf.
*/
if (c->bpf)
bpf_tap (c->bpf, buf, len);
#endif
#ifdef __bsdi__
if (c->sopt.ext) {
struct p2pcom *p = (struct p2pcom*) c->ifp;
(*p->p2p_input) (p, m);
} else
#endif
sppp_input (c->ifp, m);
}
void cxswitch (cx_chan_t *c, cx_soft_opt_t new)
{
#ifdef __bsdi__
if (new.ext && ! c->sopt.ext) {
/* Switch to external ppp implementation (BSDI) */
sppp_detach (c->ifp);
bzero ((void*) c->ifp + IFNETSZ, IFSTRUCTSZ-IFNETSZ);
} else if (! new.ext && c->sopt.ext) {
/* Switch to built-in ppp implementation */
bzero ((void*) c->ifp + IFNETSZ, IFSTRUCTSZ-IFNETSZ);
sppp_attach (c->ifp);
}
#else
new.ext = 0;
#endif
if (! new.ext) {
struct sppp *sp = (struct sppp*) c->ifp;
if (new.cisco)
sp->pp_flags |= PP_CISCO;
else
sp->pp_flags &= ~PP_CISCO;
if (new.keepalive)
sp->pp_flags |= PP_KEEPALIVE;
else
sp->pp_flags &= ~PP_KEEPALIVE;
}
c->sopt = new;
}
#endif /* NCX */