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freebsd-dev/sys/i4b/driver/i4b_ipr.c
Max Laier 02b199f158 Link ALTQ to the build and break with ABI for struct ifnet. Please recompile 
your (network) modules as well as any userland that might make sense of
sizeof(struct ifnet).
This does not change the queueing yet. These changes will follow in a
seperate commit. Same with the driver changes, which need case by case
evaluation.

__FreeBSD_version bump will follow.

Tested-by:	(i386)LINT
2004-06-13 17:29:10 +00:00

1026 lines
26 KiB
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/*
* Copyright (c) 1997, 2002 Hellmuth Michaelis. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
*---------------------------------------------------------------------------
*
* i4b_ipr.c - isdn4bsd IP over raw HDLC ISDN network driver
* ---------------------------------------------------------
* last edit-date: [Sun Mar 17 09:32:58 2002]
*
*---------------------------------------------------------------------------*
*
* statistics counter usage (interface lifetime):
* ----------------------------------------------
* sc->sc_if.if_ipackets # of received packets
* sc->sc_if.if_ierrors # of error packets not going to upper layers
* sc->sc_if.if_opackets # of transmitted packets
* sc->sc_if.if_oerrors # of error packets not being transmitted
* sc->sc_if.if_collisions # of invalid ip packets after VJ decompression
* sc->sc_if.if_ibytes # of bytes coming in from the line (before VJ)
* sc->sc_if.if_obytes # of bytes going out to the line (after VJ)
* sc->sc_if.if_imcasts (currently unused)
* sc->sc_if.if_omcasts # of frames sent out of the fastqueue
* sc->sc_if.if_iqdrops # of frames dropped on input because queue full
* sc->sc_if.if_noproto # of frames dropped on output because !AF_INET
*
* statistics counter usage (connection lifetime):
* -----------------------------------------------
* sc->sc_iinb # of ISDN incoming bytes from HSCX
* sc->sc_ioutb # of ISDN outgoing bytes from HSCX
* sc->sc_inb # of incoming bytes after decompression
* sc->sc_outb # of outgoing bytes before compression
*
*---------------------------------------------------------------------------*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "i4bipr.h"
#include "opt_i4b.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/ioccom.h>
#include <sys/sockio.h>
#include <sys/kernel.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/netisr.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#ifdef IPR_VJ
#include <sys/malloc.h>
#include <net/slcompress.h>
#define IPR_COMPRESS IFF_LINK0 /* compress TCP traffic */
#define IPR_AUTOCOMP IFF_LINK1 /* auto-enable TCP compression */
/*---------------------------------------------------------------------------
* NOTICE: using NO separate buffer relies on the assumption, that the HSCX
* IRQ handler _always_ allocates a single, continuous mbuf cluster large
* enough to hold the maximum MTU size if the ipr interface !
*
* CAUTION: i have re-defined IPR_VJ_USEBUFFER because it makes problems
* with 2 i4b's back to back running cvs over ssh, cvs simply
* aborts because it gets bad data. Everything else (telnet/ftp?etc)
* functions fine.
*---------------------------------------------------------------------------*/
#define IPR_VJ_USEBUFFER /* define to use an allocated separate buffer*/
/* undef to uncompress in the mbuf itself */
#endif /* IPR_VJ */
#include <sys/time.h>
#include <net/bpf.h>
#include <machine/i4b_ioctl.h>
#include <machine/i4b_debug.h>
#include <i4b/include/i4b_global.h>
#include <i4b/include/i4b_l3l4.h>
#include <i4b/layer4/i4b_l4.h>
#define I4BIPRMTU 1500 /* regular MTU */
#define I4BIPRMAXMTU 2000 /* max MTU */
#define I4BIPRMINMTU 500 /* min MTU */
#define I4BIPRMAXQLEN 50 /* max queue length */
#define I4BIPRACCT 1 /* enable accounting messages */
#define I4BIPRACCTINTVL 2 /* accounting msg interval in secs */
#define I4BIPRADJFRXP 1 /* adjust 1st rxd packet */
/* initialized by L4 */
static drvr_link_t ipr_drvr_linktab[NI4BIPR];
static isdn_link_t *isdn_linktab[NI4BIPR];
struct ipr_softc {
struct ifnet sc_if; /* network-visible interface */
int sc_state; /* state of the interface */
call_desc_t *sc_cdp; /* ptr to call descriptor */
int sc_updown; /* soft state of interface */
struct ifqueue sc_fastq; /* interactive traffic */
int sc_dialresp; /* dialresponse */
int sc_lastdialresp;/* last dialresponse */
struct callout_handle sc_callout;
#if I4BIPRACCT
int sc_iinb; /* isdn driver # of inbytes */
int sc_ioutb; /* isdn driver # of outbytes */
int sc_inb; /* # of bytes rx'd */
int sc_outb; /* # of bytes tx'd */
int sc_linb; /* last # of bytes rx'd */
int sc_loutb; /* last # of bytes tx'd */
int sc_fn; /* flag, first null acct */
#endif
#ifdef I4BIPRADJFRXP
int sc_first_pkt; /* flag, first rxd packet */
#endif
#if IPR_LOG
int sc_log_first; /* log first n packets */
#endif
#ifdef IPR_VJ
struct slcompress sc_compr; /* tcp compression data */
#ifdef IPR_VJ_USEBUFFER
u_char *sc_cbuf; /* tcp decompression buffer */
#endif
#endif
} ipr_softc[NI4BIPR];
enum ipr_states {
ST_IDLE, /* initialized, ready, idle */
ST_DIALING, /* dialling out to remote */
ST_CONNECTED_W, /* connected to remote */
ST_CONNECTED_A, /* connected to remote */
};
static void i4biprattach(void *);
PSEUDO_SET(i4biprattach, i4b_ipr);
static int i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
static void iprwatchdog(struct ifnet *ifp);
static void ipr_init_linktab(int unit);
static void ipr_tx_queue_empty(int unit);
static int i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rtp);
static void iprclearqueues(struct ipr_softc *sc);
/*===========================================================================*
* DEVICE DRIVER ROUTINES
*===========================================================================*/
/*---------------------------------------------------------------------------*
* interface attach routine at kernel boot time
*---------------------------------------------------------------------------*/
static void
i4biprattach(void *dummy)
{
struct ipr_softc *sc = ipr_softc;
int i;
#ifdef IPR_VJ
printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached (VJ header compression)\n", NI4BIPR);
#else
printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached\n", NI4BIPR);
#endif
for(i=0; i < NI4BIPR; sc++, i++)
{
ipr_init_linktab(i);
NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
sc->sc_if.if_softc = sc;
sc->sc_state = ST_IDLE;
if_initname(&sc->sc_if, "ipr", i);
#ifdef IPR_VJ
sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX | IPR_AUTOCOMP;
#else
sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX;
#endif
sc->sc_if.if_mtu = I4BIPRMTU;
sc->sc_if.if_type = IFT_ISDNBASIC;
sc->sc_if.if_ioctl = i4biprioctl;
sc->sc_if.if_output = i4biproutput;
sc->sc_if.if_snd.ifq_maxlen = I4BIPRMAXQLEN;
sc->sc_fastq.ifq_maxlen = I4BIPRMAXQLEN;
if(!mtx_initialized(&sc->sc_fastq.ifq_mtx))
mtx_init(&sc->sc_fastq.ifq_mtx, "i4b_ipr_fastq", NULL, MTX_DEF);
sc->sc_if.if_ipackets = 0;
sc->sc_if.if_ierrors = 0;
sc->sc_if.if_opackets = 0;
sc->sc_if.if_oerrors = 0;
sc->sc_if.if_collisions = 0;
sc->sc_if.if_ibytes = 0;
sc->sc_if.if_obytes = 0;
sc->sc_if.if_imcasts = 0;
sc->sc_if.if_omcasts = 0;
sc->sc_if.if_iqdrops = 0;
sc->sc_if.if_noproto = 0;
#if I4BIPRACCT
sc->sc_if.if_timer = 0;
sc->sc_if.if_watchdog = iprwatchdog;
sc->sc_iinb = 0;
sc->sc_ioutb = 0;
sc->sc_inb = 0;
sc->sc_outb = 0;
sc->sc_linb = 0;
sc->sc_loutb = 0;
sc->sc_fn = 1;
#endif
#if IPR_LOG
sc->sc_log_first = IPR_LOG;
#endif
#ifdef IPR_VJ
sl_compress_init(&sc->sc_compr, -1);
#ifdef IPR_VJ_USEBUFFER
if(!((sc->sc_cbuf =
(u_char *)malloc(I4BIPRMAXMTU+128, M_DEVBUF, M_WAITOK))))
{
panic("if_ipr.c, ipr_attach: VJ malloc failed");
}
#endif
#endif
sc->sc_updown = SOFT_ENA; /* soft enabled */
sc->sc_dialresp = DSTAT_NONE; /* no response */
sc->sc_lastdialresp = DSTAT_NONE;
if_attach(&sc->sc_if);
bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int));
}
}
/*---------------------------------------------------------------------------*
* output a packet to the ISDN B-channel
*---------------------------------------------------------------------------*/
static int
i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
struct rtentry *rtp)
{
struct ipr_softc *sc;
int unit;
int s;
struct ifqueue *ifq;
struct ip *ip;
s = SPLI4B();
sc = ifp->if_softc;
unit = ifp->if_dunit;
/* check for IP */
if(dst->sa_family != AF_INET)
{
if_printf(ifp, "af%d not supported\n", dst->sa_family);
m_freem(m);
splx(s);
sc->sc_if.if_noproto++;
sc->sc_if.if_oerrors++;
return(EAFNOSUPPORT);
}
/* check interface state = UP */
if(!(ifp->if_flags & IFF_UP))
{
NDBGL4(L4_IPRDBG, "ipr%d: interface is DOWN!", unit);
m_freem(m);
splx(s);
sc->sc_if.if_oerrors++;
return(ENETDOWN);
}
/* dial if necessary */
if(sc->sc_state == ST_IDLE || sc->sc_state == ST_DIALING)
{
#ifdef NOTDEF
switch(sc->sc_dialresp)
{
case DSTAT_TFAIL: /* transient failure */
NDBGL4(L4_IPRDBG, "ipr%d: transient dial failure!", unit);
m_freem(m);
iprclearqueues(sc);
sc->sc_dialresp = DSTAT_NONE;
splx(s);
sc->sc_if.if_oerrors++;
return(ENETUNREACH);
break;
case DSTAT_PFAIL: /* permanent failure */
NDBGL4(L4_IPRDBG, "ipr%d: permanent dial failure!", unit);
m_freem(m);
iprclearqueues(sc);
sc->sc_dialresp = DSTAT_NONE;
splx(s);
sc->sc_if.if_oerrors++;
return(EHOSTUNREACH);
break;
case DSTAT_INONLY: /* no dialout allowed*/
NDBGL4(L4_IPRDBG, "ipr%d: dialout not allowed failure!", unit);
m_freem(m);
iprclearqueues(sc);
sc->sc_dialresp = DSTAT_NONE;
splx(s);
sc->sc_if.if_oerrors++;
return(EHOSTUNREACH);
break;
}
#endif
NDBGL4(L4_IPRDBG, "ipr%d: send dial request message!", unit);
NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_DIALING", unit);
i4b_l4_dialout(BDRV_IPR, unit);
sc->sc_state = ST_DIALING;
}
#if IPR_LOG
if(sc->sc_log_first > 0)
{
--(sc->sc_log_first);
i4b_l4_packet_ind(BDRV_IPR, unit, 1, m );
}
#endif
/* update access time */
microtime(&sc->sc_if.if_lastchange);
/*
* check, if type of service indicates interactive, i.e. telnet,
* traffic. in case it is interactive, put it into the fast queue,
* else (i.e. ftp traffic) put it into the "normal" queue
*/
ip = mtod(m, struct ip *); /* get ptr to ip header */
if(ip->ip_tos & IPTOS_LOWDELAY)
ifq = &sc->sc_fastq;
else
ifq = (struct ifqueue *)&sc->sc_if.if_snd;
/* check for space in choosen send queue */
if(! IF_HANDOFF(ifq, m, NULL))
{
NDBGL4(L4_IPRDBG, "ipr%d: send queue full!", unit);
splx(s);
sc->sc_if.if_oerrors++;
return(ENOBUFS);
}
NDBGL4(L4_IPRDBG, "ipr%d: add packet to send queue!", unit);
ipr_tx_queue_empty(unit);
splx(s);
return (0);
}
/*---------------------------------------------------------------------------*
* process ioctl
*---------------------------------------------------------------------------*/
static int
i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ipr_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *)data;
struct ifaddr *ifa = (struct ifaddr *)data;
int s;
int error = 0;
s = SPLI4B();
switch (cmd)
{
case SIOCAIFADDR: /* add interface address */
case SIOCSIFADDR: /* set interface address */
case SIOCSIFDSTADDR: /* set interface destination address */
if(ifa->ifa_addr->sa_family != AF_INET)
error = EAFNOSUPPORT;
else
sc->sc_if.if_flags |= IFF_UP;
microtime(&sc->sc_if.if_lastchange);
break;
case SIOCSIFFLAGS: /* set interface flags */
if(!(ifr->ifr_flags & IFF_UP))
{
if(sc->sc_if.if_flags & IFF_RUNNING)
{
/* disconnect ISDN line */
i4b_l4_drvrdisc(BDRV_IPR,
ifp->if_dunit);
sc->sc_if.if_flags &= ~IFF_RUNNING;
}
sc->sc_state = ST_IDLE;
/* empty queues */
iprclearqueues(sc);
}
if(ifr->ifr_flags & IFF_DEBUG)
{
/* enable debug messages */
}
microtime(&sc->sc_if.if_lastchange);
break;
case SIOCSIFMTU: /* set interface MTU */
if(ifr->ifr_mtu > I4BIPRMAXMTU)
error = EINVAL;
else if(ifr->ifr_mtu < I4BIPRMINMTU)
error = EINVAL;
else
{
ifp->if_mtu = ifr->ifr_mtu;
microtime(&sc->sc_if.if_lastchange);
}
break;
#if 0
/* not needed for FreeBSD, done in sl_compress_init() (-hm) */
/* need to add an ioctl: set VJ max slot ID
* #define IPRIOCSMAXCID _IOW('I', XXX, int)
*/
#ifdef IPR_VJ
case IPRIOCSMAXCID:
{
struct thread *td = curthread; /* XXX */
if((error = suser(td)))
return (error);
sl_compress_setup(sc->sc_compr, *(int *)data);
}
break;
#endif
#endif /* #if 0 */
default:
error = EINVAL;
break;
}
splx(s);
return(error);
}
/*---------------------------------------------------------------------------*
* clear the interface's send queues
*---------------------------------------------------------------------------*/
static void
iprclearqueues(struct ipr_softc *sc)
{
int x;
x = splimp();
IF_DRAIN(&sc->sc_fastq);
IF_DRAIN(&sc->sc_if.if_snd);
splx(x);
}
#if I4BIPRACCT
/*---------------------------------------------------------------------------*
* watchdog routine
*---------------------------------------------------------------------------*/
static void
iprwatchdog(struct ifnet *ifp)
{
int unit = ifp->if_dunit;
struct ipr_softc *sc = ifp->if_softc;
bchan_statistics_t bs;
/* get # of bytes in and out from the HSCX driver */
(*isdn_linktab[unit]->bch_stat)
(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
sc->sc_ioutb += bs.outbytes;
sc->sc_iinb += bs.inbytes;
if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
{
int ri = (sc->sc_iinb - sc->sc_linb)/I4BIPRACCTINTVL;
int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BIPRACCTINTVL;
if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
sc->sc_fn = 0;
else
sc->sc_fn = 1;
sc->sc_linb = sc->sc_iinb;
sc->sc_loutb = sc->sc_ioutb;
i4b_l4_accounting(BDRV_IPR, unit, ACCT_DURING,
sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
}
sc->sc_if.if_timer = I4BIPRACCTINTVL;
}
#endif /* I4BIPRACCT */
/*===========================================================================*
* ISDN INTERFACE ROUTINES
*===========================================================================*/
/*---------------------------------------------------------------------------*
* start transmitting after connect
*---------------------------------------------------------------------------*/
static void
i4bipr_connect_startio(struct ipr_softc *sc)
{
int s = SPLI4B();
if(sc->sc_state == ST_CONNECTED_W)
{
sc->sc_state = ST_CONNECTED_A;
ipr_tx_queue_empty(sc->sc_if.if_dunit);
}
splx(s);
}
/*---------------------------------------------------------------------------*
* this routine is called from L4 handler at connect time
*---------------------------------------------------------------------------*/
static void
ipr_connect(int unit, void *cdp)
{
struct ipr_softc *sc = &ipr_softc[unit];
int s;
sc->sc_cdp = (call_desc_t *)cdp;
s = SPLI4B();
NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_CONNECTED", unit);
sc->sc_if.if_flags |= IFF_RUNNING;
sc->sc_state = ST_CONNECTED_W;
sc->sc_dialresp = DSTAT_NONE;
sc->sc_lastdialresp = DSTAT_NONE;
#if I4BIPRACCT
sc->sc_iinb = 0;
sc->sc_ioutb = 0;
sc->sc_inb = 0;
sc->sc_outb = 0;
sc->sc_linb = 0;
sc->sc_loutb = 0;
sc->sc_if.if_timer = I4BIPRACCTINTVL;
#endif
#ifdef I4BIPRADJFRXP
sc->sc_first_pkt = 1;
#endif
/*
* Sometimes ISDN B-channels are switched thru asymmetic. This
* means that under such circumstances B-channel data (the first
* three packets of a TCP connection in my case) may get lost,
* causing a large delay until the connection is started.
* When the sending of the very first packet of a TCP connection
* is delayed for a to be empirically determined delay (close
* to a second in my case) those packets go thru and the TCP
* connection comes up "almost" immediately (-hm).
*/
if(sc->sc_cdp->isdntxdelay > 0)
{
int delay;
if (hz == 100) {
delay = sc->sc_cdp->isdntxdelay; /* avoid any rounding */
} else {
delay = sc->sc_cdp->isdntxdelay*hz;
delay /= 100;
}
START_TIMER(sc->sc_callout, (TIMEOUT_FUNC_T)i4bipr_connect_startio, (void *)sc, delay);
}
else
{
sc->sc_state = ST_CONNECTED_A;
ipr_tx_queue_empty(unit);
}
splx(s);
/* we don't need any negotiation - pass event back right now */
i4b_l4_negcomplete(sc->sc_cdp);
}
/*---------------------------------------------------------------------------*
* this routine is called from L4 handler at disconnect time
*---------------------------------------------------------------------------*/
static void
ipr_disconnect(int unit, void *cdp)
{
call_desc_t *cd = (call_desc_t *)cdp;
struct ipr_softc *sc = &ipr_softc[unit];
/* new stuff to check that the active channel is being closed */
if (cd != sc->sc_cdp)
{
NDBGL4(L4_IPRDBG, "ipr%d: channel %d not active",
cd->driver_unit, cd->channelid);
return;
}
#if I4BIPRACCT
sc->sc_if.if_timer = 0;
#endif
#if IPR_LOG
/* show next IPR_LOG packets again */
sc->sc_log_first = IPR_LOG;
#endif
i4b_l4_accounting(BDRV_IPR, cd->driver_unit, ACCT_FINAL,
sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
sc->sc_cdp = (call_desc_t *)0;
NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
sc->sc_dialresp = DSTAT_NONE;
sc->sc_lastdialresp = DSTAT_NONE;
sc->sc_if.if_flags &= ~IFF_RUNNING;
sc->sc_state = ST_IDLE;
}
/*---------------------------------------------------------------------------*
* this routine is used to give a feedback from userland daemon
* in case of dial problems
*---------------------------------------------------------------------------*/
static void
ipr_dialresponse(int unit, int status, cause_t cause)
{
struct ipr_softc *sc = &ipr_softc[unit];
sc->sc_dialresp = status;
NDBGL4(L4_IPRDBG, "ipr%d: last=%d, this=%d",
unit, sc->sc_lastdialresp, sc->sc_dialresp);
if(status != DSTAT_NONE)
{
NDBGL4(L4_IPRDBG, "ipr%d: clearing queues", unit);
iprclearqueues(sc);
}
}
/*---------------------------------------------------------------------------*
* interface soft up/down
*---------------------------------------------------------------------------*/
static void
ipr_updown(int unit, int updown)
{
struct ipr_softc *sc = &ipr_softc[unit];
sc->sc_updown = updown;
}
/*---------------------------------------------------------------------------*
* this routine is called from the HSCX interrupt handler
* when a new frame (mbuf) has been received and was put on
* the rx queue. It is assumed that this routines runs at
* pri level splimp() ! Keep it short !
*---------------------------------------------------------------------------*/
static void
ipr_rx_data_rdy(int unit)
{
register struct ipr_softc *sc = &ipr_softc[unit];
register struct mbuf *m;
#ifdef IPR_VJ
#ifdef IPR_VJ_USEBUFFER
u_char *cp = sc->sc_cbuf;
#endif
int len, c;
#endif
if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
return;
m->m_pkthdr.rcvif = &sc->sc_if;
m->m_pkthdr.len = m->m_len;
microtime(&sc->sc_if.if_lastchange);
#ifdef I4BIPRADJFRXP
/*
* The very first packet after the B channel is switched thru
* has very often several bytes of random data prepended. This
* routine looks where the IP header starts and removes the
* the bad data.
*/
if(sc->sc_first_pkt)
{
unsigned char *mp = m->m_data;
int i;
sc->sc_first_pkt = 0;
for(i = 0; i < m->m_len; i++, mp++)
{
if( ((*mp & 0xf0) == 0x40) &&
((*mp & 0x0f) >= 0x05) )
{
m->m_data = mp;
m->m_pkthdr.len -= i;
break;
}
}
}
#endif
sc->sc_if.if_ipackets++;
sc->sc_if.if_ibytes += m->m_pkthdr.len;
#ifdef IPR_VJ
if((c = (*(mtod(m, u_char *)) & 0xf0)) != (IPVERSION << 4))
{
/* copy data to buffer */
len = m->m_len;
#ifdef IPR_VJ_USEBUFFER
/* XXX */ m_copydata(m, 0, len, cp);
#endif
if(c & 0x80)
{
c = TYPE_COMPRESSED_TCP;
}
else if(c == TYPE_UNCOMPRESSED_TCP)
{
#ifdef IPR_VJ_USEBUFFER
*cp &= 0x4f; /* XXX */
#else
*(mtod(m, u_char *)) &= 0x4f;
#endif
}
/*
* We've got something that's not an IP packet.
* If compression is enabled, try to decompress it.
* Otherwise, if `auto-enable' compression is on and
* it's a reasonable packet, decompress it and then
* enable compression. Otherwise, drop it.
*/
if(sc->sc_if.if_flags & IPR_COMPRESS)
{
#ifdef IPR_VJ_USEBUFFER
len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
#else
len = sl_uncompress_tcp((u_char **)&m->m_data, len,
(u_int)c, &sc->sc_compr);
#endif
if(len <= 0)
{
#ifdef DEBUG_IPR_VJ
printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_COMPRESS!\n");
#endif
goto error;
}
}
else if((sc->sc_if.if_flags & IPR_AUTOCOMP) &&
(c == TYPE_UNCOMPRESSED_TCP) && (len >= 40))
{
#ifdef IPR_VJ_USEBUFFER
len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
#else
len = sl_uncompress_tcp((u_char **)&m->m_data, len,
(u_int)c, &sc->sc_compr);
#endif
if(len <= 0)
{
#ifdef DEBUG_IPR_VJ
printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_AUTOCOMP!\n");
#endif
goto error;
}
sc->sc_if.if_flags |= IPR_COMPRESS;
}
else
{
#ifdef DEBUG_IPR_VJ
printf("i4b_ipr, ipr_input: invalid ip packet!\n");
#endif
error:
sc->sc_if.if_ierrors++;
sc->sc_if.if_collisions++;
m_freem(m);
return;
}
#ifdef IPR_VJ_USEBUFFER
/* XXX */ m_copyback(m, 0, len, cp);
#else
m->m_len = m->m_pkthdr.len = len;
#endif
}
#endif
#if I4BIPRACCT
/* NB. do the accounting after decompression! */
sc->sc_inb += m->m_pkthdr.len;
#endif
#if IPR_LOG
if(sc->sc_log_first > 0)
{
--(sc->sc_log_first);
i4b_l4_packet_ind(BDRV_IPR, unit, 0, m );
}
#endif
if(sc->sc_if.if_bpf)
{
/* prepend the address family as a four byte field */
struct mbuf mm;
u_int af = AF_INET;
mm.m_next = m;
mm.m_len = 4;
mm.m_data = (char *)&af;
BPF_MTAP(&sc->sc_if, &mm);
}
if(! netisr_queue(NETISR_IP, m))
{
NDBGL4(L4_IPRDBG, "ipr%d: ipintrq full!", unit);
sc->sc_if.if_ierrors++;
sc->sc_if.if_iqdrops++;
}
else
{
schednetisr(NETISR_IP);
}
}
/*---------------------------------------------------------------------------*
* this routine is called from the HSCX interrupt handler
* when the last frame has been sent out and there is no
* further frame (mbuf) in the tx queue.
*---------------------------------------------------------------------------*/
static void
ipr_tx_queue_empty(int unit)
{
register struct ipr_softc *sc = &ipr_softc[unit];
register struct mbuf *m;
#ifdef IPR_VJ
struct ip *ip;
#endif
int x = 0;
if(sc->sc_state != ST_CONNECTED_A)
return;
for(;;)
{
IF_DEQUEUE(&sc->sc_fastq, m);
if(m)
{
sc->sc_if.if_omcasts++;
}
else
{
IF_DEQUEUE(&sc->sc_if.if_snd, m);
if(m == NULL)
break;
}
microtime(&sc->sc_if.if_lastchange);
if(sc->sc_if.if_bpf)
{
/* prepend the address family as a four byte field */
struct mbuf mm;
u_int af = AF_INET;
mm.m_next = m;
mm.m_len = 4;
mm.m_data = (char *)&af;
BPF_MTAP(&sc->sc_if, &mm);
}
#if I4BIPRACCT
sc->sc_outb += m->m_pkthdr.len; /* size before compression */
#endif
#ifdef IPR_VJ
if((ip = mtod(m, struct ip *))->ip_p == IPPROTO_TCP)
{
if(sc->sc_if.if_flags & IPR_COMPRESS)
{
*mtod(m, u_char *) |= sl_compress_tcp(m, ip,
&sc->sc_compr, 1);
}
}
#endif
x = 1;
IF_LOCK(isdn_linktab[unit]->tx_queue);
if(_IF_QFULL(isdn_linktab[unit]->tx_queue))
{
NDBGL4(L4_IPRDBG, "ipr%d: tx queue full!", unit);
m_freem(m);
}
else
{
sc->sc_if.if_obytes += m->m_pkthdr.len;
sc->sc_if.if_opackets++;
_IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
}
IF_UNLOCK(isdn_linktab[unit]->tx_queue);
}
if(x)
(*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel);
}
/*---------------------------------------------------------------------------*
* this routine is called from the HSCX interrupt handler
* each time a packet is received or transmitted. It should
* be used to implement an activity timeout mechanism.
*---------------------------------------------------------------------------*/
static void
ipr_activity(int unit, int rxtx)
{
ipr_softc[unit].sc_cdp->last_active_time = SECOND;
}
/*---------------------------------------------------------------------------*
* return this drivers linktab address
*---------------------------------------------------------------------------*/
drvr_link_t *
ipr_ret_linktab(int unit)
{
return(&ipr_drvr_linktab[unit]);
}
/*---------------------------------------------------------------------------*
* setup the isdn_linktab for this driver
*---------------------------------------------------------------------------*/
void
ipr_set_linktab(int unit, isdn_link_t *ilt)
{
isdn_linktab[unit] = ilt;
}
/*---------------------------------------------------------------------------*
* initialize this drivers linktab
*---------------------------------------------------------------------------*/
static void
ipr_init_linktab(int unit)
{
ipr_drvr_linktab[unit].unit = unit;
ipr_drvr_linktab[unit].bch_rx_data_ready = ipr_rx_data_rdy;
ipr_drvr_linktab[unit].bch_tx_queue_empty = ipr_tx_queue_empty;
ipr_drvr_linktab[unit].bch_activity = ipr_activity;
ipr_drvr_linktab[unit].line_connected = ipr_connect;
ipr_drvr_linktab[unit].line_disconnected = ipr_disconnect;
ipr_drvr_linktab[unit].dial_response = ipr_dialresponse;
ipr_drvr_linktab[unit].updown_ind = ipr_updown;
}
/*===========================================================================*/
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