cleaned up version of the tunnel driver
This commit is contained in:
deraadt
parent
7377ae9734
commit
d19b5e0673
828
sys/net/if_tun.c
828
sys/net/if_tun.c
|
|
@ -1,20 +1,12 @@
|
|||
/* UNFINISHED CONVERSION TO 386BSD -wfj */
|
||||
|
||||
/* if_tun.c - tunnel interface module & driver */
|
||||
|
||||
/*
|
||||
* Copyright (c) 1988, Julian Onions.
|
||||
* Copyright (c) 1988, Julian Onions.
|
||||
*
|
||||
* This source may be freely distributed, however I would be interested
|
||||
* in any changes that are made.
|
||||
*/
|
||||
|
||||
/*
|
||||
* 90/02/06 15:03 - Fixed a bug in where TIOCGPGRP and TIOCSPGRP were
|
||||
* mixed up. Anders Klemets - klemets@sics.se
|
||||
*
|
||||
* $Id: if_tun.c,v 1.5 1993/08/09 01:19:38 deraadt Exp $
|
||||
*
|
||||
* if_tun.c - tunnel interface module & driver
|
||||
*
|
||||
* $Id: if_tun.c,v 1.6 1993/11/14 20:07:20 deraadt Exp $
|
||||
*/
|
||||
|
||||
#include "tun.h"
|
||||
|
|
@ -33,531 +25,455 @@
|
|||
* Nottingham University 1987.
|
||||
*/
|
||||
|
||||
#include "param.h"
|
||||
#include "systm.h"
|
||||
#include "mbuf.h"
|
||||
#include "buf.h"
|
||||
#include "protosw.h"
|
||||
#include "socket.h"
|
||||
#include "ioctl.h"
|
||||
#include "errno.h"
|
||||
#include "syslog.h"
|
||||
#include "select.h"
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/mbuf.h>
|
||||
#include <sys/buf.h>
|
||||
#include <sys/protosw.h>
|
||||
#include <sys/socket.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <sys/errno.h>
|
||||
#include <sys/syslog.h>
|
||||
#include <sys/select.h>
|
||||
|
||||
#include "net/if.h"
|
||||
#include "net/netisr.h"
|
||||
#include "net/route.h"
|
||||
#include <net/if.h>
|
||||
#include <net/if_tun.h>
|
||||
#include <net/netisr.h>
|
||||
#include <net/route.h>
|
||||
|
||||
#ifdef INET
|
||||
#include "netinet/in.h"
|
||||
#include "netinet/in_systm.h"
|
||||
#include "netinet/in_var.h"
|
||||
#include "netinet/ip.h"
|
||||
#include "netinet/if_ether.h"
|
||||
#include <netinet/in.h>
|
||||
#include <netinet/in_systm.h>
|
||||
#include <netinet/in_var.h>
|
||||
#include <netinet/ip.h>
|
||||
#include <netinet/if_ether.h>
|
||||
#endif
|
||||
|
||||
#ifdef NS
|
||||
#include "netns/ns.h"
|
||||
#include "netns/ns_if.h"
|
||||
#include <netns/ns.h>
|
||||
#include <netns/ns_if.h>
|
||||
#endif
|
||||
|
||||
#define TUNDEBUG if (tundebug) printf
|
||||
#define TUNDEBUG if (tundebug) printf
|
||||
int tundebug = 0;
|
||||
|
||||
int tundebug = 0;
|
||||
struct tunctl
|
||||
struct tun_softc tunctl[NTUN];
|
||||
extern int ifqmaxlen;
|
||||
|
||||
int tunoutput __P((dev_t, int, int, struct proc *));
|
||||
int tunclose __P((dev_t, int));
|
||||
int tunoutput __P((struct ifnet *, struct mbuf *, struct sockaddr *));
|
||||
int tunread __P((dev_t, struct uio *));
|
||||
int tunwrite __P((dev_t, struct uio *));
|
||||
int tuncioctl __P((dev_t, int, caddr_t, data);
|
||||
int tunioctl __P((struct ifnet *, int, caddr_t, int));
|
||||
int tunselect __P((dev_t, int);
|
||||
|
||||
static int tunattach __P((int));
|
||||
static int tuninit __P((int));
|
||||
|
||||
/*
|
||||
* tunnel open - must be superuser & the device must be
|
||||
* configured in
|
||||
*/
|
||||
int
|
||||
tunopen(dev, flag, mode, p)
|
||||
dev_t dev;
|
||||
int flag, mode;
|
||||
struct proc *p;
|
||||
{
|
||||
u_short tun_flags; /* misc flags */
|
||||
struct ifnet tun_if; /* the interface */
|
||||
int tun_pgrp; /* the process group - if any */
|
||||
struct selinfo tun_rsel; /* read select */
|
||||
struct selinfo tun_wsel; /* write select (not used) */
|
||||
} tunctl[NTUN];
|
||||
|
||||
extern int ifqmaxlen;
|
||||
|
||||
int tunoutput (), tunioctl (), tuninit ();
|
||||
|
||||
/* tunnel open - must be superuser & the device must be configured in */
|
||||
tunopen (dev, flag)
|
||||
dev_t dev;
|
||||
{
|
||||
struct proc *p = curproc; /* XXX */
|
||||
register int unit;
|
||||
struct tunctl *tp;
|
||||
register struct ifnet *ifp;
|
||||
int error;
|
||||
struct ifnet *ifp;
|
||||
struct tunctl *tp;
|
||||
register int unit, error;
|
||||
|
||||
if (error = suser(p->p_ucred, &p->p_acflag))
|
||||
return (error);
|
||||
|
||||
if ((unit = minor (dev)) >= NTUN)
|
||||
return (ENXIO);
|
||||
tp = &tunctl[unit];
|
||||
if (tp->tun_flags & TUN_OPEN)
|
||||
return ENXIO;
|
||||
if ((tp->tun_flags & TUN_INITED) == 0) {
|
||||
tp->tun_flags = TUN_INITED;
|
||||
tunattach (unit);
|
||||
}
|
||||
ifp = &tp->tun_if;
|
||||
tp->tun_flags |= TUN_OPEN;
|
||||
TUNDEBUG ("%s%d: open\n", ifp->if_name, ifp->if_unit);
|
||||
return (0);
|
||||
if ((unit = minor(dev)) >= NTUN)
|
||||
return (ENXIO);
|
||||
tp = &tunctl[unit];
|
||||
if (tp->tun_flags & TUN_OPEN)
|
||||
return ENXIO;
|
||||
if ((tp->tun_flags & TUN_INITED) == 0) {
|
||||
tp->tun_flags = TUN_INITED;
|
||||
tunattach(unit);
|
||||
}
|
||||
ifp = &tp->tun_if;
|
||||
tp->tun_flags |= TUN_OPEN;
|
||||
TUNDEBUG("%s%d: open\n", ifp->if_name, ifp->if_unit);
|
||||
return (0);
|
||||
}
|
||||
|
||||
/* tunclose - close the device - mark i/f down & delete routing info */
|
||||
tunclose (dev, flag)
|
||||
dev_t dev;
|
||||
/*
|
||||
* tunclose - close the device - mark i/f down & delete
|
||||
* routing info
|
||||
*/
|
||||
int
|
||||
tunclose(dev, flag)
|
||||
dev_t dev;
|
||||
int flag;
|
||||
{
|
||||
int s;
|
||||
register int unit = minor (dev);
|
||||
register struct tunctl *tp = &tunctl[unit];
|
||||
register struct ifnet *ifp = &tp->tun_if;
|
||||
register struct mbuf *m;
|
||||
struct tunctl *tp = &tunctl[unit];
|
||||
struct ifnet *ifp = &tp->tun_if;
|
||||
struct mbuf *m;
|
||||
register int unit = minor(dev), s;
|
||||
|
||||
tp->tun_flags &= TUN_INITED;
|
||||
tp->tun_flags &= TUN_INITED;
|
||||
|
||||
/*
|
||||
* junk all pending output
|
||||
*/
|
||||
do {
|
||||
s = splimp ();
|
||||
IF_DEQUEUE (&ifp->if_snd, m);
|
||||
splx (s);
|
||||
if (m) /* actually - m_freem checks this - but what the hell */
|
||||
m_freem (m);
|
||||
} while (m != 0);
|
||||
if (ifp->if_flags & IFF_UP) {
|
||||
s = splimp ();
|
||||
if_down (ifp);
|
||||
if (ifp->if_flags & IFF_RUNNING)
|
||||
rtinit (ifp->if_addrlist, (int)SIOCDELRT, RTF_HOST);
|
||||
splx (s);
|
||||
}
|
||||
tp -> tun_pgrp = 0;
|
||||
if (tp -> tun_rsel)
|
||||
selwakeup (&tp->tun_rsel);
|
||||
|
||||
tp -> tun_rsel = tp -> tun_wsel = (struct proc *)0;
|
||||
/*
|
||||
* junk all pending output
|
||||
*/
|
||||
do {
|
||||
s = splimp();
|
||||
IF_DEQUEUE(&ifp->if_snd, m);
|
||||
splx(s);
|
||||
if (m)
|
||||
m_freem(m);
|
||||
} while (m);
|
||||
|
||||
TUNDEBUG ("%s%d: closed\n", ifp->if_name, ifp->if_unit);
|
||||
return (0);
|
||||
if (ifp->if_flags & IFF_UP) {
|
||||
s = splimp();
|
||||
if_down(ifp);
|
||||
if (ifp->if_flags & IFF_RUNNING)
|
||||
rtinit(ifp->if_addrlist, (int)SIOCDELRT, RTF_HOST);
|
||||
splx(s);
|
||||
}
|
||||
tp->tun_pgrp = 0;
|
||||
if (tp->tun_rsel)
|
||||
selwakeup(&tp->tun_rsel);
|
||||
|
||||
tp->tun_rsel = tp->tun_wsel = (struct proc *)0;
|
||||
|
||||
TUNDEBUG ("%s%d: closed\n", ifp->if_name, ifp->if_unit);
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*
|
||||
* attach an interface N.B. argument is not same as other drivers
|
||||
*/
|
||||
int
|
||||
tunattach (unit)
|
||||
int unit;
|
||||
static int
|
||||
tunattach(unit)
|
||||
int unit;
|
||||
{
|
||||
register struct ifnet *ifp = &tunctl[unit].tun_if;
|
||||
register struct sockaddr_in *sin;
|
||||
struct ifnet *ifp = &tunctl[unit].tun_if;
|
||||
struct sockaddr_in *sin;
|
||||
|
||||
ifp->if_unit = unit;
|
||||
ifp->if_name = "tun";
|
||||
ifp->if_mtu = TUNMTU;
|
||||
ifp->if_ioctl = tunioctl;
|
||||
ifp->if_output = tunoutput;
|
||||
ifp->if_init = tuninit;
|
||||
#ifndef BSD4_3
|
||||
sin = (struct sockaddr_in *) & ifp->if_addr;
|
||||
sin->sin_family = AF_INET;
|
||||
#endif
|
||||
ifp->if_flags = IFF_POINTOPOINT;
|
||||
ifp->if_snd.ifq_maxlen = ifqmaxlen;
|
||||
ifp->if_collisions = ifp->if_ierrors = ifp->if_oerrors = 0;
|
||||
ifp->if_ipackets = ifp->if_opackets = 0;
|
||||
if_attach (ifp);
|
||||
TUNDEBUG ("%s%d: tunattach\n", ifp->if_name, ifp->if_unit);
|
||||
return 0;
|
||||
ifp->if_unit = unit;
|
||||
ifp->if_name = "tun";
|
||||
ifp->if_mtu = TUNMTU;
|
||||
ifp->if_ioctl = tunioctl;
|
||||
ifp->if_output = tunoutput;
|
||||
ifp->if_flags = IFF_POINTOPOINT;
|
||||
ifp->if_snd.ifq_maxlen = ifqmaxlen;
|
||||
ifp->if_collisions = 0;
|
||||
ifp->if_ierrors = 0;
|
||||
ifp->if_oerrors = 0;
|
||||
ifp->if_ipackets = 0;
|
||||
ifp->if_opackets = 0;
|
||||
if_attach(ifp);
|
||||
TUNDEBUG("%s%d: tunattach\n", ifp->if_name, ifp->if_unit);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int
|
||||
tuninit (unit)
|
||||
int unit;
|
||||
static int
|
||||
tuninit(unit)
|
||||
int unit;
|
||||
{
|
||||
register struct tunctl *tp = &tunctl[unit];
|
||||
register struct ifnet *ifp = &tp->tun_if;
|
||||
#ifndef BSD4_3
|
||||
register struct sockaddr_in *sin;
|
||||
struct tunctl *tp = &tunctl[unit];
|
||||
struct ifnet *ifp = &tp->tun_if;
|
||||
|
||||
sin = (struct sockaddr_in *) & ifp->if_addr;
|
||||
if (sin->sin_addr.s_addr == 0) /* if address still unknown */
|
||||
return;
|
||||
if_rtinit (ifp, RTF_UP);
|
||||
#endif
|
||||
ifp->if_flags |= IFF_UP | IFF_RUNNING;
|
||||
tp->tun_flags |= TUN_IASET;
|
||||
TUNDEBUG ("%s%d: tuninit\n", ifp->if_name, ifp->if_unit);
|
||||
return 0;
|
||||
ifp->if_flags |= IFF_UP | IFF_RUNNING;
|
||||
tp->tun_flags |= TUN_IASET;
|
||||
TUNDEBUG("%s%d: tuninit\n", ifp->if_name, ifp->if_unit);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Process an ioctl request.
|
||||
* The problem here is 4.2 pass a struct ifreq * to this routine,
|
||||
* sun only passes a struct sockaddr * since 3.2 at least. This is
|
||||
* rather upsetting! Also, sun doesn't pass the SIOCDSTADDR ioctl through
|
||||
* so we can't detect this being set directly. This is the reason for
|
||||
* tuncheckready.
|
||||
* Under 4.3 and SunOs 4.0 we now get the SIOCSIFDSTADDR ioctl, and we get a
|
||||
* struct in_ifaddr * for data. (tte)
|
||||
*/
|
||||
|
||||
#if !defined(BSD4_3) && defined(sun)
|
||||
|
||||
/*
|
||||
* workaround for not being able to detect DSTADDR being set.
|
||||
*/
|
||||
|
||||
tuncheckready (ifp)
|
||||
struct ifnet *ifp;
|
||||
{
|
||||
struct tunctl *tp = &tunctl[ifp->if_unit];
|
||||
struct sockaddr_in *sin;
|
||||
|
||||
sin = (struct sockaddr_in *) &ifp->if_dstaddr;
|
||||
if (sin->sin_addr.s_addr == 0)
|
||||
return 0;
|
||||
tp -> tun_flags |= TUN_DSTADDR;
|
||||
return 1;
|
||||
}
|
||||
#else
|
||||
#define tuncheckready(dummy) 1
|
||||
#endif /* !defined(BSD4_3) && defined(sun) */
|
||||
|
||||
int
|
||||
tunioctl (ifp, cmd, data)
|
||||
register struct ifnet *ifp;
|
||||
int cmd;
|
||||
caddr_t data;
|
||||
tunioctl(ifp, cmd, data, flag)
|
||||
struct ifnet *ifp;
|
||||
int cmd;
|
||||
caddr_t data;
|
||||
int flag;
|
||||
{
|
||||
#ifndef BSD4_3
|
||||
#ifdef sun
|
||||
struct sockaddr_in *sin = (struct sockaddr_in *) data;
|
||||
#else
|
||||
struct sockaddr_in *sin;
|
||||
struct ifreq *ifr = (struct ifreq *) data;
|
||||
#endif
|
||||
#endif /* BSD4_3 */
|
||||
int error = 0, s;
|
||||
struct tunctl *tp = &tunctl[ifp->if_unit];
|
||||
|
||||
int s = splimp (), error = 0;
|
||||
struct tunctl *tp = &tunctl[ifp->if_unit];
|
||||
|
||||
switch (cmd)
|
||||
{
|
||||
case SIOCSIFADDR:
|
||||
#ifndef BSD4_3
|
||||
if (ifp->if_flags & IFF_RUNNING)
|
||||
if_rtinit (ifp, -1); /* delete previous route */
|
||||
#ifndef sun
|
||||
sin = (struct sockaddr_in *)&ifr -> ifr_addr;
|
||||
#endif
|
||||
ifp->if_addr = *((struct sockaddr *) sin);
|
||||
ifp->if_net = in_netof (sin->sin_addr);
|
||||
ifp->if_host[0] = in_lnaof (sin->sin_addr);
|
||||
#endif
|
||||
tuninit (ifp->if_unit);
|
||||
break;
|
||||
case SIOCSIFDSTADDR:
|
||||
tp->tun_flags |= TUN_DSTADDR;
|
||||
#ifndef BSD4_3
|
||||
#ifndef sun
|
||||
sin = (struct sockaddr_in *)&ifr -> ifr_addr;
|
||||
#endif
|
||||
ifp->if_dstaddr = *((struct sockaddr *)sin);
|
||||
#endif BSD4_3
|
||||
TUNDEBUG ("%s%d: destination addres set\n", ifp->if_name,
|
||||
ifp -> if_unit);
|
||||
break;
|
||||
default:
|
||||
error = EINVAL;
|
||||
}
|
||||
splx (s);
|
||||
return (error);
|
||||
s = splimp();
|
||||
switch(cmd) {
|
||||
case SIOCSIFADDR:
|
||||
tuninit(ifp->if_unit);
|
||||
break;
|
||||
case SIOCSIFDSTADDR:
|
||||
tp->tun_flags |= TUN_DSTADDR;
|
||||
TUNDEBUG("%s%d: destination address set\n", ifp->if_name,
|
||||
ifp->if_unit);
|
||||
break;
|
||||
default:
|
||||
error = EINVAL;
|
||||
}
|
||||
splx(s);
|
||||
return (error);
|
||||
}
|
||||
|
||||
/*
|
||||
* tunoutput - queue packets from higher level ready to put out.
|
||||
*/
|
||||
tunoutput (ifp, m0, dst)
|
||||
struct ifnet *ifp;
|
||||
struct mbuf *m0;
|
||||
struct sockaddr *dst;
|
||||
int
|
||||
tunoutput(ifp, m0, dst)
|
||||
struct ifnet *ifp;
|
||||
struct mbuf *m0;
|
||||
struct sockaddr *dst;
|
||||
{
|
||||
struct tunctl *tp;
|
||||
struct proc *p;
|
||||
int s;
|
||||
struct tunctl *tp = &tunctl[ifp->if_unit];
|
||||
struct proc *p;
|
||||
int s;
|
||||
|
||||
TUNDEBUG ("%s%d: tunoutput\n", ifp->if_name, ifp->if_unit);
|
||||
tp = &tunctl[ifp->if_unit];
|
||||
if ((tp->tun_flags & TUN_READY) != TUN_READY) {
|
||||
if(tuncheckready(ifp) == 0) {
|
||||
TUNDEBUG ("%s%d: not ready 0%o\n", ifp->if_name,
|
||||
ifp->if_unit, tp->tun_flags);
|
||||
m_freem (m0);
|
||||
return EHOSTDOWN;
|
||||
}
|
||||
}
|
||||
TUNDEBUG ("%s%d: tunoutput\n", ifp->if_name, ifp->if_unit);
|
||||
|
||||
switch (dst->sa_family) {
|
||||
switch(dst->sa_family) {
|
||||
#ifdef INET
|
||||
case AF_INET:
|
||||
s = splimp ();
|
||||
if (IF_QFULL (&ifp->if_snd))
|
||||
{
|
||||
IF_DROP (&ifp->if_snd);
|
||||
m_freem (m0);
|
||||
splx (s);
|
||||
ifp->if_collisions++;
|
||||
return (ENOBUFS);
|
||||
}
|
||||
IF_ENQUEUE (&ifp->if_snd, m0);
|
||||
splx (s);
|
||||
ifp->if_opackets++;
|
||||
break;
|
||||
case AF_INET:
|
||||
s = splimp();
|
||||
if (IF_QFULL(&ifp->if_snd)) {
|
||||
IF_DROP(&ifp->if_snd);
|
||||
m_freem(m0);
|
||||
splx(s);
|
||||
ifp->if_collisions++;
|
||||
return (ENOBUFS);
|
||||
}
|
||||
IF_ENQUEUE(&ifp->if_snd, m0);
|
||||
splx(s);
|
||||
ifp->if_opackets++;
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
m_freem (m0);
|
||||
return EAFNOSUPPORT;
|
||||
}
|
||||
default:
|
||||
m_freem(m0);
|
||||
return EAFNOSUPPORT;
|
||||
}
|
||||
|
||||
if (tp->tun_flags & TUN_RWAIT) {
|
||||
tp->tun_flags &= ~TUN_RWAIT;
|
||||
wakeup ((caddr_t) tp);
|
||||
}
|
||||
if (tp->tun_flags & TUN_ASYNC && tp -> tun_pgrp != 0) {
|
||||
if (tp->tun_pgrp > 0)
|
||||
gsignal (tp->tun_pgrp, SIGIO);
|
||||
else if ((p = pfind (-tp->tun_pgrp)) != 0)
|
||||
psignal (p, SIGIO);
|
||||
}
|
||||
selwakeup (&tp->tun_rsel);
|
||||
return 0;
|
||||
if (tp->tun_flags & TUN_RWAIT) {
|
||||
tp->tun_flags &= ~TUN_RWAIT;
|
||||
wakeup((caddr_t)tp);
|
||||
}
|
||||
if (tp->tun_flags & TUN_ASYNC && tp->tun_pgrp) {
|
||||
if (tp->tun_pgrp > 0)
|
||||
gsignal(tp->tun_pgrp, SIGIO);
|
||||
else if (p = pfind(-tp->tun_pgrp))
|
||||
psignal(p, SIGIO);
|
||||
}
|
||||
selwakeup(&tp->tun_rsel);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* the cdevsw interface is now pretty minimal.
|
||||
*/
|
||||
|
||||
tuncioctl (dev, cmd, data, flag)
|
||||
dev_t dev;
|
||||
caddr_t data;
|
||||
int
|
||||
tuncioctl(dev, cmd, data, flag)
|
||||
dev_t dev;
|
||||
int cmd;
|
||||
caddr_t data;
|
||||
int flag;
|
||||
{
|
||||
int unit = minor(dev);
|
||||
struct tunctl *tp = &tunctl[unit];
|
||||
int s;
|
||||
int unit = minor(dev), s;
|
||||
struct tunctl *tp = &tunctl[unit];
|
||||
|
||||
switch (cmd) {
|
||||
case TUNSDEBUG:
|
||||
tundebug = *(int *)data;
|
||||
break;
|
||||
|
||||
case TUNGDEBUG:
|
||||
*(int *)data = tundebug;
|
||||
break;
|
||||
|
||||
case FIONBIO:
|
||||
if (*(int *)data)
|
||||
tp->tun_flags |= TUN_NBIO;
|
||||
else
|
||||
tp->tun_flags &= ~TUN_NBIO;
|
||||
break;
|
||||
|
||||
case FIOASYNC:
|
||||
if (*(int *)data)
|
||||
tp->tun_flags |= TUN_ASYNC;
|
||||
else
|
||||
tp->tun_flags &= ~TUN_ASYNC;
|
||||
break;
|
||||
|
||||
case FIONREAD:
|
||||
s = splimp ();
|
||||
if (tp->tun_if.if_snd.ifq_head)
|
||||
*(int *)data = tp->tun_if.if_snd.ifq_head->m_len;
|
||||
else *(int *)data = 0;
|
||||
splx (s);
|
||||
break;
|
||||
|
||||
case TIOCSPGRP:
|
||||
tp->tun_pgrp = *(int *)data;
|
||||
break;
|
||||
|
||||
case TIOCGPGRP:
|
||||
*(int *)data = tp->tun_pgrp;
|
||||
break;
|
||||
|
||||
default:
|
||||
return (ENOTTY);
|
||||
}
|
||||
return (0);
|
||||
switch (cmd) {
|
||||
case TUNSDEBUG:
|
||||
tundebug = *(int *)data;
|
||||
break;
|
||||
case TUNGDEBUG:
|
||||
*(int *)data = tundebug;
|
||||
break;
|
||||
case FIONBIO:
|
||||
if (*(int *)data)
|
||||
tp->tun_flags |= TUN_NBIO;
|
||||
else
|
||||
tp->tun_flags &= ~TUN_NBIO;
|
||||
break;
|
||||
case FIOASYNC:
|
||||
if (*(int *)data)
|
||||
tp->tun_flags |= TUN_ASYNC;
|
||||
else
|
||||
tp->tun_flags &= ~TUN_ASYNC;
|
||||
break;
|
||||
case FIONREAD:
|
||||
s = splimp();
|
||||
if (tp->tun_if.if_snd.ifq_head)
|
||||
*(int *)data = tp->tun_if.if_snd.ifq_head->m_len;
|
||||
else
|
||||
*(int *)data = 0;
|
||||
splx(s);
|
||||
break;
|
||||
case TIOCSPGRP:
|
||||
tp->tun_pgrp = *(int *)data;
|
||||
break;
|
||||
case TIOCGPGRP:
|
||||
*(int *)data = tp->tun_pgrp;
|
||||
break;
|
||||
default:
|
||||
return (ENOTTY);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*
|
||||
* The cdevsw read interface - reads a packet at a time, or at least as much
|
||||
* of a packet as can be read.
|
||||
* The cdevsw read interface - reads a packet at a time, or at
|
||||
* least as much of a packet as can be read.
|
||||
*/
|
||||
tunread (dev, uio)
|
||||
dev_t dev;
|
||||
struct uio *uio;
|
||||
int
|
||||
tunread(dev, uio)
|
||||
dev_t dev;
|
||||
struct uio *uio;
|
||||
{
|
||||
register struct ifnet *ifp;
|
||||
register struct mbuf *m, *m0;
|
||||
int unit = minor (dev);
|
||||
int len, s;
|
||||
int error = 0;
|
||||
struct tunctl *tp;
|
||||
struct ifnet *ifp = &tp->tun_if;
|
||||
struct mbuf *m, *m0;
|
||||
struct tunctl *tp = &tunctl[unit];
|
||||
int unit = minor(dev);
|
||||
int error=0, len, s;
|
||||
|
||||
tp = &tunctl[unit];
|
||||
ifp = &tp->tun_if;
|
||||
TUNDEBUG ("%s%d: read\n", ifp->if_name, ifp->if_unit);
|
||||
if ((tp->tun_flags & TUN_READY) != TUN_READY) {
|
||||
if(tuncheckready(ifp) == 0) {
|
||||
TUNDEBUG ("%s%d: not ready 0%o\n", ifp->if_name,
|
||||
ifp->if_unit, tp->tun_flags);
|
||||
return EHOSTDOWN;
|
||||
}
|
||||
}
|
||||
TUNDEBUG ("%s%d: read\n", ifp->if_name, ifp->if_unit);
|
||||
tp->tun_flags &= ~TUN_RWAIT;
|
||||
|
||||
tp->tun_flags &= ~TUN_RWAIT;
|
||||
s = splimp();
|
||||
do {
|
||||
IF_DEQUEUE(&ifp->if_snd, m0);
|
||||
if (m0 == 0) {
|
||||
if (tp->tun_flags & TUN_NBIO) {
|
||||
splx(s);
|
||||
return EWOULDBLOCK;
|
||||
}
|
||||
tp->tun_flags |= TUN_RWAIT;
|
||||
tsleep((caddr_t)tp, PZERO + 1, "tunread", 0);
|
||||
}
|
||||
} while (m0 == 0);
|
||||
splx(s);
|
||||
|
||||
s = splimp ();
|
||||
do {
|
||||
IF_DEQUEUE (&ifp->if_snd, m0);
|
||||
if (m0 == 0) {
|
||||
if (tp -> tun_flags & TUN_NBIO) {
|
||||
splx (s);
|
||||
return EWOULDBLOCK;
|
||||
}
|
||||
tp->tun_flags |= TUN_RWAIT;
|
||||
tsleep ((caddr_t) tp, PZERO + 1, "tunread", 0);
|
||||
}
|
||||
} while (m0 == 0);
|
||||
splx (s);
|
||||
while (m0 && uio->uio_resid > 0 && error == 0) {
|
||||
len = MIN(uio->uio_resid, m0->m_len);
|
||||
if (len == 0)
|
||||
break;
|
||||
error = uiomove(mtod(m0, caddr_t), len,
|
||||
UIO_READ, uio);
|
||||
MFREE(m0, m);
|
||||
m0 = m;
|
||||
}
|
||||
|
||||
while (m0 && uio->uio_resid > 0 && error == 0) {
|
||||
len = MIN (uio->uio_resid, m0->m_len);
|
||||
if (len == 0)
|
||||
break;
|
||||
error = uiomove (mtod (m0, caddr_t), len,
|
||||
UIO_READ, uio);
|
||||
MFREE (m0, m);
|
||||
m0 = m;
|
||||
}
|
||||
|
||||
if (m0 != 0) {
|
||||
TUNDEBUG ("Dropping mbuf\n");
|
||||
m_freem (m0);
|
||||
}
|
||||
return error;
|
||||
if (m0) {
|
||||
TUNDEBUG("Dropping mbuf\n");
|
||||
m_freem(m0);
|
||||
}
|
||||
return error;
|
||||
}
|
||||
|
||||
/*
|
||||
* the cdevsw write interface - an atomic write is a packet - or else!
|
||||
*/
|
||||
|
||||
tunwrite (dev, uio)
|
||||
int dev;
|
||||
struct uio *uio;
|
||||
int
|
||||
tunwrite(dev, uio)
|
||||
int dev;
|
||||
struct uio *uio;
|
||||
{
|
||||
int error = 0;
|
||||
int unit = minor (dev);
|
||||
struct mbuf *top, **mp, *m;
|
||||
struct ifnet *ifp = &(tunctl[unit].tun_if);
|
||||
int s;
|
||||
int unit = minor (dev);
|
||||
struct ifnet *ifp = &(tunctl[unit].tun_if);
|
||||
struct mbuf *top, **mp, *m;
|
||||
int error=0, s;
|
||||
|
||||
TUNDEBUG ("%s%d: tunwrite\n", ifp->if_name, ifp->if_unit);
|
||||
TUNDEBUG("%s%d: tunwrite\n", ifp->if_name, ifp->if_unit);
|
||||
|
||||
if (uio->uio_resid < 0 || uio->uio_resid > TUNMTU) {
|
||||
TUNDEBUG ("%s%d: len=%d!\n", ifp->if_name, ifp->if_unit,
|
||||
uio->uio_resid);
|
||||
return EIO;
|
||||
}
|
||||
top = 0;
|
||||
mp = ⊤
|
||||
while (error == 0 && uio->uio_resid > 0) {
|
||||
MGET (m, M_DONTWAIT, MT_DATA);
|
||||
if (m == 0) {
|
||||
error = ENOBUFS;
|
||||
break;
|
||||
}
|
||||
m->m_len = MIN (MLEN, uio->uio_resid);
|
||||
error = uiomove (mtod (m, caddr_t), m->m_len, UIO_WRITE, uio);
|
||||
*mp = m;
|
||||
mp = &m->m_next;
|
||||
}
|
||||
if (error) {
|
||||
if (top)
|
||||
m_freem (top);
|
||||
return error;
|
||||
}
|
||||
if (uio->uio_resid < 0 || uio->uio_resid > TUNMTU) {
|
||||
TUNDEBUG("%s%d: len=%d!\n", ifp->if_name, ifp->if_unit,
|
||||
uio->uio_resid);
|
||||
return EIO;
|
||||
}
|
||||
top = 0;
|
||||
mp = ⊤
|
||||
while (error == 0 && uio->uio_resid > 0) {
|
||||
MGET(m, M_DONTWAIT, MT_DATA);
|
||||
if (m == 0) {
|
||||
error = ENOBUFS;
|
||||
break;
|
||||
}
|
||||
m->m_len = MIN(MLEN, uio->uio_resid);
|
||||
error = uiomove(mtod(m, caddr_t), m->m_len, UIO_WRITE, uio);
|
||||
*mp = m;
|
||||
mp = &m->m_next;
|
||||
}
|
||||
if (error) {
|
||||
if (top)
|
||||
m_freem(top);
|
||||
return error;
|
||||
}
|
||||
|
||||
#ifdef BSD4_3
|
||||
/*
|
||||
* Place interface pointer before the data
|
||||
* for the receiving protocol.
|
||||
*/
|
||||
if (top->m_off <= MMAXOFF &&
|
||||
top->m_off >= MMINOFF + sizeof(struct ifnet *)) {
|
||||
top->m_off -= sizeof(struct ifnet *);
|
||||
top->m_len += sizeof(struct ifnet *);
|
||||
} else {
|
||||
MGET(m, M_DONTWAIT, MT_HEADER);
|
||||
if (m == (struct mbuf *)0)
|
||||
return (ENOBUFS);
|
||||
m->m_len = sizeof(struct ifnet *);
|
||||
m->m_next = top;
|
||||
top = m;
|
||||
}
|
||||
*(mtod(top, struct ifnet **)) = ifp;
|
||||
#endif /* BSD4_3 */
|
||||
/*
|
||||
* Place interface pointer before the data
|
||||
* for the receiving protocol.
|
||||
*/
|
||||
if (top->m_off <= MMAXOFF &&
|
||||
top->m_off >= MMINOFF + sizeof(struct ifnet *)) {
|
||||
top->m_off -= sizeof(struct ifnet *);
|
||||
top->m_len += sizeof(struct ifnet *);
|
||||
} else {
|
||||
MGET(m, M_DONTWAIT, MT_HEADER);
|
||||
if (m == (struct mbuf *)0)
|
||||
return (ENOBUFS);
|
||||
m->m_len = sizeof(struct ifnet *);
|
||||
m->m_next = top;
|
||||
top = m;
|
||||
}
|
||||
*(mtod(top, struct ifnet **)) = ifp;
|
||||
|
||||
s = splimp ();
|
||||
if (IF_QFULL (&ipintrq)) {
|
||||
IF_DROP (&ipintrq);
|
||||
splx (s);
|
||||
ifp->if_collisions++;
|
||||
m_freem (top);
|
||||
return ENOBUFS;
|
||||
}
|
||||
IF_ENQUEUE (&ipintrq, top);
|
||||
splx (s);
|
||||
ifp->if_ipackets++;
|
||||
schednetisr (NETISR_IP);
|
||||
return error;
|
||||
s = splimp();
|
||||
if (IF_QFULL (&ipintrq)) {
|
||||
IF_DROP(&ipintrq);
|
||||
splx(s);
|
||||
ifp->if_collisions++;
|
||||
m_freem(top);
|
||||
return ENOBUFS;
|
||||
}
|
||||
IF_ENQUEUE(&ipintrq, top);
|
||||
splx(s);
|
||||
ifp->if_ipackets++;
|
||||
schednetisr(NETISR_IP);
|
||||
return error;
|
||||
}
|
||||
|
||||
/*
|
||||
* tunselect - the select interface, this is only useful on reads really.
|
||||
* The write detect always returns true, write never blocks anyway, it either
|
||||
* accepts the packet or drops it.
|
||||
* tunselect - the select interface, this is only useful on reads
|
||||
* really. The write detect always returns true, write never blocks
|
||||
* anyway, it either accepts the packet or drops it.
|
||||
*/
|
||||
tunselect (dev, rw)
|
||||
dev_t dev;
|
||||
int rw;
|
||||
int
|
||||
tunselect(dev, rw)
|
||||
dev_t dev;
|
||||
int rw;
|
||||
{
|
||||
int unit = minor (dev);
|
||||
register struct tunctl *tp = &tunctl[unit];
|
||||
struct ifnet *ifp = &tp->tun_if;
|
||||
int s = splimp ();
|
||||
int unit = minor(dev), s;
|
||||
struct tunctl *tp = &tunctl[unit];
|
||||
struct ifnet *ifp = &tp->tun_if;
|
||||
|
||||
TUNDEBUG ("%s%d: tunselect\n", ifp->if_name, ifp->if_unit);
|
||||
switch (rw) {
|
||||
case FREAD:
|
||||
if (ifp->if_snd.ifq_len > 0) {
|
||||
splx (s);
|
||||
TUNDEBUG ("%s%d: tunselect q=%d\n", ifp->if_name,
|
||||
ifp->if_unit, ifp->if_snd.ifq_len);
|
||||
return 1;
|
||||
}
|
||||
selrecord(p, &tp->tun_rsel);
|
||||
break;
|
||||
case FWRITE:
|
||||
splx (s);
|
||||
return 1;
|
||||
}
|
||||
splx (s);
|
||||
TUNDEBUG ("%s%d: tunselect waiting\n", ifp->if_name, ifp->if_unit);
|
||||
return 0;
|
||||
s = splimp();
|
||||
TUNDEBUG("%s%d: tunselect\n", ifp->if_name, ifp->if_unit);
|
||||
|
||||
switch (rw) {
|
||||
case FREAD:
|
||||
if (ifp->if_snd.ifq_len > 0) {
|
||||
splx(s);
|
||||
TUNDEBUG("%s%d: tunselect q=%d\n", ifp->if_name,
|
||||
ifp->if_unit, ifp->if_snd.ifq_len);
|
||||
return 1;
|
||||
}
|
||||
selrecord(p, &tp->tun_rsel);
|
||||
break;
|
||||
case FWRITE:
|
||||
splx(s);
|
||||
return 1;
|
||||
}
|
||||
splx(s);
|
||||
TUNDEBUG("%s%d: tunselect waiting\n", ifp->if_name, ifp->if_unit);
|
||||
return 0;
|
||||
}
|
||||
#endif NTUN
|
||||
|
|
|
|||
|
|
@ -0,0 +1,38 @@
|
|||
/*
|
||||
* Copyright (c) 1988, Julian Onions.
|
||||
*
|
||||
* This source may be freely distributed, however I would be interested
|
||||
* in any changes that are made.
|
||||
*
|
||||
* from: $Header: if_tnreg.h,v 1.1.2.1 1992/07/16 22:39:16 friedl Exp
|
||||
* $Id: if_tun.h,v 1.1 1993/11/14 20:07:23 deraadt Exp $
|
||||
*/
|
||||
|
||||
#ifndef _NET_IF_TUN_H_
|
||||
#define _NET_IF_TUN_H_
|
||||
|
||||
struct tun_softc {
|
||||
u_short tun_flags; /* misc flags */
|
||||
#define TUN_OPEN 0x0001
|
||||
#define TUN_INITED 0x0002
|
||||
#define TUN_RCOLL 0x0004
|
||||
#define TUN_IASET 0x0008
|
||||
#define TUN_DSTADDR 0x0010
|
||||
#define TUN_READY 0x0020
|
||||
#define TUN_RWAIT 0x0040
|
||||
#define TUN_ASYNC 0x0080
|
||||
#define TUN_NBIO 0x0100
|
||||
struct ifnet tun_if; /* the interface */
|
||||
int tun_pgrp; /* the process group - if any */
|
||||
struct selinfo tun_rsel; /* read select */
|
||||
struct selinfo tun_wsel; /* write select (not used) */
|
||||
};
|
||||
|
||||
/* Maximum packet size */
|
||||
#define TUNMTU 0x1000
|
||||
|
||||
/* ioctl's for get/set debug */
|
||||
#define TUNSDEBUG _IOW('t', 90, int)
|
||||
#define TUNGDEBUG _IOR('t', 89, int)
|
||||
|
||||
#endif /* !_NET_IF_TUN_H_ */
|
||||
Loading…
Reference in New Issue