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Make ppp(4) devices clonable and unloadable.

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This commit is contained in:
Brooks Davis 2002-08-09 15:30:48 +00:00
parent 190c0c27be
commit 05c872ad62
13 changed files with 108 additions and 50 deletions
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13
share/man/man4/ppp.4
View File

@ -41,7 +41,7 @@
.Nm ppp
.Nd point to point protocol network interface
.Sh SYNOPSIS
.Cd "device ppp" Op Ar count
.Cd "device ppp"
.Sh DESCRIPTION
The
.Nm
@ -53,6 +53,17 @@ interface can use various types of compression and has many features over
the
.Xr sl 4
protocol.
.Pp
Each
.Nm
interface is created at runtime using interface cloning.
This is most easily done with the
.Xr ifconfig 8
.Cm create
command or using the
.Va cloned_interfaces
variable in
.Xr rc.conf 5 .
.Sh DIAGNOSTICS
.Bl -diag
.It ppp%d: af%d not supported.

2
sys/alpha/conf/GENERIC
View File

@ -160,7 +160,7 @@ device random # Entropy device
device loop # Network loopback
device ether # Ethernet support
device sl # Kernel SLIP
device ppp 1 # Kernel PPP
device ppp # Kernel PPP
device tun # Packet tunnel.
device pty # Pseudo-ttys (telnet etc)
device md # Memory "disks"

2
sys/amd64/conf/GENERIC
View File

@ -216,7 +216,7 @@ device random # Entropy device
device loop # Network loopback
device ether # Ethernet support
device sl # Kernel SLIP
device ppp 1 # Kernel PPP
device ppp # Kernel PPP
device tun # Packet tunnel.
device pty # Pseudo-ttys (telnet etc)
device md # Memory "disks"

2
sys/conf/NOTES
View File

@ -432,7 +432,7 @@ device disc #Discard device (ds0, ds1, etc)
device tap #Virtual Ethernet driver
device tun #Tunnel driver (ppp(8), nos-tun(8))
device sl #Serial Line IP
device ppp 2 #Point-to-point protocol
device ppp #Point-to-point protocol
options PPP_BSDCOMP #PPP BSD-compress support
options PPP_DEFLATE #PPP zlib/deflate/gzip support
options PPP_FILTER #enable bpf filtering (needs bpf)

2
sys/conf/files
View File

@ -1033,7 +1033,7 @@ net/if_iso88025subr.c optional token
net/if_loop.c optional loop
net/if_media.c standard
net/if_mib.c standard
net/if_ppp.c count ppp
net/if_ppp.c optional ppp
net/if_sl.c optional sl
net/if_spppsubr.c optional sppp
net/if_spppsubr.c optional i4bisppp

2
sys/i386/conf/GENERIC
View File

@ -216,7 +216,7 @@ device random # Entropy device
device loop # Network loopback
device ether # Ethernet support
device sl # Kernel SLIP
device ppp 1 # Kernel PPP
device ppp # Kernel PPP
device tun # Packet tunnel.
device pty # Pseudo-ttys (telnet etc)
device md # Memory "disks"

2
sys/ia64/conf/GENERIC
View File

@ -148,7 +148,7 @@ device random # Entropy device
device loop # Network loopback
device ether # Ethernet support
device sl # Kernel SLIP
device ppp 1 # Kernel PPP
device ppp # Kernel PPP
device tun # Packet tunnel.
device pty # Pseudo-ttys (telnet etc)
device md # Memory "disks"

6
sys/modules/if_ppp/Makefile
View File

@ -4,9 +4,8 @@
KMOD= if_ppp
SRCS= if_ppp.c ppp_tty.c slcompress.c \
opt_inet.h opt_ipx.h opt_mac.h opt_ppp.h ppp.h vnode_if.h
opt_inet.h opt_ipx.h opt_mac.h opt_ppp.h vnode_if.h
NPPP?= 2
PPP_BSDCOMP?= 1 # 0/1
PPP_DEFLATE?= 1 # 0/1
PPP_FILTER?= 1 # 0/1 - requires bpf to be configured in kernel
@ -44,7 +43,4 @@ opt_ppp.h:
echo "#define PPP_FILTER ${PPP_FILTER}" >> ${.TARGET}
.endif
ppp.h:
echo "#define NPPP ${NPPP}" > ${.TARGET}
.include <bsd.kmod.mk>

106
sys/net/if_ppp.c
View File

@ -73,8 +73,6 @@
/* from if_sl.c,v 1.11 84/10/04 12:54:47 rick Exp */
/* from NetBSD: if_ppp.c,v 1.15.2.2 1994/07/28 05:17:58 cgd Exp */
#include "ppp.h"
#include "opt_inet.h"
#include "opt_ipx.h"
#include "opt_mac.h"
@ -132,10 +130,13 @@
#include <net/ppp_comp.h>
#endif
static struct ppp_softc ppp_softc[NPPP];
#define PPPNAME "ppp"
static MALLOC_DEFINE(M_PPP, PPPNAME, "PPP interface");
static LIST_HEAD(, ppp_softc) ppp_softc_list;
/* XXX layering violation */
extern void pppasyncattach(void *);
extern void pppasyncdetach(void);
static int pppsioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
static void pppintr(void);
@ -145,6 +146,11 @@ static void ppp_ccp(struct ppp_softc *, struct mbuf *m, int rcvd);
static void ppp_ccp_closed(struct ppp_softc *);
static void ppp_inproc(struct ppp_softc *, struct mbuf *);
static void pppdumpm(struct mbuf *m0);
static int ppp_clone_create(struct if_clone *, int);
static void ppp_clone_destroy(struct ifnet *);
static struct if_clone ppp_cloner = IF_CLONE_INITIALIZER(PPPNAME,
ppp_clone_create, ppp_clone_destroy, 0, IF_MAXUNIT);
/*
* Some useful mbuf macros not in mbuf.h.
@ -188,18 +194,15 @@ static struct compressor *ppp_compressors[8] = {
};
#endif /* PPP_COMPRESS */
/*
* Called from boot code to establish ppp interfaces.
*/
static void
pppattach(void)
static int
ppp_clone_create(struct if_clone *ifc, int unit)
{
register struct ppp_softc *sc;
register int i = 0;
struct ppp_softc *sc;
for (sc = ppp_softc; i < NPPP; sc++) {
sc->sc_if.if_name = "ppp";
sc->sc_if.if_unit = i++;
sc = malloc(sizeof(struct ppp_softc), M_PPP, M_WAITOK | M_ZERO);
sc->sc_if.if_softc = sc;
sc->sc_if.if_name = PPPNAME;
sc->sc_if.if_unit = unit;
sc->sc_if.if_mtu = PPP_MTU;
sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
sc->sc_if.if_type = IFT_PPP;
@ -215,13 +218,24 @@ pppattach(void)
mtx_init(&sc->sc_rawq.ifq_mtx, "ppp_rawq", NULL, MTX_DEF);
if_attach(&sc->sc_if);
bpfattach(&sc->sc_if, DLT_PPP, PPP_HDRLEN);
}
register_netisr(NETISR_PPP, pppintr);
/*
* XXX layering violation - if_ppp can work over any lower level
* transport that cares to attach to it.
*/
pppasyncattach(NULL);
LIST_INSERT_HEAD(&ppp_softc_list, sc, sc_list);
return 1;
}
static void
ppp_clone_destroy(struct ifnet *ifp)
{
struct ppp_softc *sc;
sc = ifp->if_softc;
LIST_REMOVE(sc, sc_list);
bpfdetach(ifp);
if_detach(ifp);
mtx_destroy(&sc->sc_rawq.ifq_mtx);
mtx_destroy(&sc->sc_fastq.ifq_mtx);
mtx_destroy(&sc->sc_inq.ifq_mtx);
}
static int
@ -229,10 +243,27 @@ ppp_modevent(module_t mod, int type, void *data)
{
switch (type) {
case MOD_LOAD:
pppattach();
if_clone_attach(&ppp_cloner);
register_netisr(NETISR_PPP, pppintr);
/*
* XXX layering violation - if_ppp can work over any lower
* level transport that cares to attach to it.
*/
pppasyncattach(NULL);
break;
case MOD_UNLOAD:
printf("if_ppp module unload - not possible for this module type\n");
/* XXX: layering violation */
pppasyncdetach();
unregister_netisr(NETISR_PPP);
if_clone_detach(&ppp_cloner);
while (!LIST_EMPTY(&ppp_softc_list))
ppp_clone_destroy(
&LIST_FIRST(&ppp_softc_list)->sc_if);
return EINVAL;
}
return 0;
@ -253,18 +284,32 @@ struct ppp_softc *
pppalloc(pid)
pid_t pid;
{
int nppp, i;
int i;
char tmpname[IFNAMSIZ];
struct ifnet *ifp;
struct ppp_softc *sc;
for (nppp = 0, sc = ppp_softc; nppp < NPPP; nppp++, sc++)
LIST_FOREACH(sc, &ppp_softc_list, sc_list) {
if (sc->sc_xfer == pid) {
sc->sc_xfer = 0;
return sc;
}
for (nppp = 0, sc = ppp_softc; nppp < NPPP; nppp++, sc++)
}
LIST_FOREACH(sc, &ppp_softc_list, sc_list) {
if (sc->sc_devp == NULL)
break;
if (nppp >= NPPP)
}
/* Try to clone an interface if we don't have a free one */
if (sc == NULL) {
strcpy(tmpname, PPPNAME);
if (if_clone_create(tmpname, sizeof(tmpname)) != 0)
return NULL;
ifp = ifunit(tmpname);
if (ifp == NULL)
return NULL;
sc = ifp->if_softc;
}
if (sc == NULL || sc->sc_devp != NULL)
return NULL;
sc->sc_flags = 0;
@ -576,7 +621,7 @@ pppsioctl(ifp, cmd, data)
caddr_t data;
{
struct thread *td = curthread; /* XXX */
register struct ppp_softc *sc = &ppp_softc[ifp->if_unit];
register struct ppp_softc *sc = ifp->if_softc;
register struct ifaddr *ifa = (struct ifaddr *)data;
register struct ifreq *ifr = (struct ifreq *)data;
struct ppp_stats *psp;
@ -706,7 +751,7 @@ pppoutput(ifp, m0, dst, rtp)
struct sockaddr *dst;
struct rtentry *rtp;
{
register struct ppp_softc *sc = &ppp_softc[ifp->if_unit];
register struct ppp_softc *sc = ifp->if_softc;
int protocol, address, control;
u_char *cp;
int s, error;
@ -1093,11 +1138,10 @@ static void
pppintr()
{
struct ppp_softc *sc;
int i, s;
int s;
struct mbuf *m;
sc = ppp_softc;
for (i = 0; i < NPPP; ++i, ++sc) {
LIST_FOREACH(sc, &ppp_softc_list, sc_list) {
s = splimp();
if (!(sc->sc_flags & SC_TBUSY)
&& (sc->sc_if.if_snd.ifq_head || sc->sc_fastq.ifq_head)) {

1
sys/net/if_pppvar.h
View File

@ -96,6 +96,7 @@ struct ppp_softc {
u_short sc_outfcs; /* FCS so far for output packet */
u_char sc_rawin[16]; /* chars as received */
int sc_rawin_count; /* # in sc_rawin */
LIST_ENTRY(ppp_softc) sc_list;
};
struct ppp_softc *pppalloc(pid_t pid);

10
sys/net/ppp_tty.c
View File

@ -114,6 +114,7 @@ static void ppplogchar(struct ppp_softc *, int);
/* XXX called from if_ppp.c - layering violation */
void pppasyncattach(void *);
void pppasyncdetach(void);
/*
* Some useful mbuf macros not in mbuf.h.
@ -156,8 +157,13 @@ void
pppasyncattach(dummy)
void *dummy;
{
/* register line discipline */
linesw[PPPDISC] = pppdisc;
ldisc_register(PPPDISC, &pppdisc);
}
void
pppasyncdetach()
{
ldisc_deregister(PPPDISC);
}
/*

2
sys/pc98/conf/GENERIC
View File

@ -202,7 +202,7 @@ device random # Entropy device
device loop # Network loopback
device ether # Ethernet support
device sl # Kernel SLIP
device ppp 1 # Kernel PPP
device ppp # Kernel PPP
device tun # Packet tunnel.
device pty # Pseudo-ttys (telnet etc)
device md # Memory "disks"

2
sys/sparc64/conf/GENERIC
View File

@ -163,7 +163,7 @@ device random # Entropy device
device loop # Network loopback
device ether # Ethernet support
device sl # Kernel SLIP
device ppp 1 # Kernel PPP
device ppp # Kernel PPP
device tun # Packet tunnel.
device pty # Pseudo-ttys (telnet etc)
device md # Memory "disks"