www.pudn.com > vxworks_tcpip_code.rar > if.c
/* if.c - network interface utility routines */
/* Copyright 1984-1996 Wind River Systems, Inc. */
#include "copyright_wrs.h"
/* $NetBSD: if.c,v 1.18 1994/10/30 21:48:46 cgd Exp $ */
/*
* Copyright (c) 1980, 1986, 1993
* The Regents of the University of California. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)if.c 8.3 (Berkeley) 1/4/94
*/
/*
modification history
--------------------
01j,10mar00,ann Added the callback to the m2Lib routine
01i,24mar99,ead Added a call to m2SetIfLastChange() in ifioctl() when the
interfaces operational status changes. (SPR #23290)
01h,16jul98,n_s fixed ifioctl to pass correct flags to driver Ioctl. SPR 21124
01g,16dec97,vin fixed if_dettach SPR 9970.
01f,10dec97,vin added spl protection to ifreset, if_dettach, if_attach,
ifIndexToIfp SPR 9987.
01e,05oct97,vin fixed if_dettach, for changes in multicast code.
01d,12aug97,rjc made if_index global to support non ip interfaces (SPR 9060).
01c,02jul97,vin fixed warnings. added _rtIfaceMsgHook for scaling out routing
sockets.
01b,05dec96,vin moved ifafree() from route.c(), added ifIndexToIfp(),
deleted ifnet_addrs in ifattach(), made if_index static.
made ifqmaxlen static, replaced calloc with MALLOC, replaced
free(..) with FREE(..)
01a,03mar96,vin created from BSD4.4 stuff,integrated with 02t of if.c.
rewrote if_dettach(), added in_ifaddr_remove in if_dettach
*/
/*
DESCRIPTION
*/
#include "vxWorks.h"
#include "sys/socket.h"
#include "net/socketvar.h"
#include "net/protosw.h"
#include "net/route.h"
#include "net/if_dl.h"
#include "net/if_subr.h"
#include "sys/ioctl.h"
#include "errno.h"
#include "net/if.h"
#include "wdLib.h"
#include "net/systm.h"
#include "net/mbuf.h"
#ifdef INET
#include "netinet/in_var.h"
#endif /* INET */
#include "m2Lib.h"
IMPORT void netJobAdd ();
extern pfctlinput(int cmd, struct sockaddr * sa);
extern sysClkRateGet();
extern void in_ifaddr_remove ();
extern arpioctl (int cmd, caddr_t data);
/* XXX temporary fix should be removed after updating all drivers */
extern void ether_ifattach(struct ifnet * ifp);
extern int ether_output ();
int ifAttachChange; /* Set when a change in the Net I/F list occurs */
struct ifnet *ifnet; /* head of linked list of interfaces */
/* locals */
LOCAL WDOG_ID ifslowtimoWd; /* watchdog timer for slowtimo routine */
static int ifqmaxlen = IFQ_MAXLEN;
static char * sprint_d(unsigned int, char *, int);
/* globals */
int if_index = 0;
/*
* Network interface utility routines.
*
* Routines with ifa_ifwith* names take sockaddr *'s as
* parameters.
*/
void ifinit()
{
register struct ifnet *ifp;
for (ifp = ifnet; ifp; ifp = ifp->if_next)
if (ifp->if_snd.ifq_maxlen == 0)
ifp->if_snd.ifq_maxlen = ifqmaxlen;
/* XXX using watchdogs good idea? -gae */
ifslowtimoWd = wdCreate ();
if_slowtimo ();
}
/*
* Call each interface on a reset.
*/
void ifreset ()
{
register struct ifnet *ifp;
int s;
s = splnet ();
for (ifp = ifnet; ifp; ifp = ifp->if_next)
if (ifp->if_reset)
(*ifp->if_reset)(ifp->if_unit);
splx (s);
}
/*
* Attach an interface to the list of "active" interfaces.
*/
void if_attach(ifp)
struct ifnet *ifp;
{
unsigned socksize, ifasize;
int namelen, unitlen, masklen;
char workbuf[12], *unitname;
register struct ifnet **p = &ifnet;
register struct sockaddr_dl *sdl;
register struct ifaddr *ifa;
extern void link_rtrequest();
int s;
/* make interface not use trailer protocol by default */
ifp->if_flags |= IFF_NOTRAILERS;
/* make send queue maxlen be default if none specified;
* this relaxes the requirement that all interfaces be attached
* before calling ifinit */
if (ifp->if_snd.ifq_maxlen == 0)
ifp->if_snd.ifq_maxlen = ifqmaxlen;
s = splnet ();
while (*p)
p = &((*p)->if_next);
splx (s);
*p = ifp;
/* Notify MIB-II of change */
ifAttachChange++;
ifp->if_index = ++if_index;
/*
* create a Link Level name for this device
*/
unitname = sprint_d((u_int)ifp->if_unit, workbuf, sizeof(workbuf));
namelen = strlen(ifp->if_name);
unitlen = strlen(unitname);
#define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) +
unitlen + namelen;
socksize = masklen + ifp->if_addrlen;
#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
socksize = ROUNDUP(socksize);
if (socksize < sizeof(*sdl))
socksize = sizeof(*sdl);
ifasize = sizeof(*ifa) + 2 * socksize;
MALLOC (ifa, struct ifaddr *, ifasize, MT_IFADDR, M_WAIT);
if (ifa == 0)
return;
bzero((caddr_t)ifa, ifasize);
sdl = (struct sockaddr_dl *)(ifa + 1);
sdl->sdl_len = socksize;
sdl->sdl_family = AF_LINK;
bcopy(ifp->if_name, sdl->sdl_data, namelen);
bcopy(unitname, namelen + (caddr_t)sdl->sdl_data, unitlen);
sdl->sdl_nlen = (namelen += unitlen);
sdl->sdl_index = ifp->if_index;
sdl->sdl_type = ifp->if_type;
ifa->ifa_ifp = ifp;
ifa->ifa_next = ifp->if_addrlist;
ifa->ifa_rtrequest = link_rtrequest;
ifp->if_addrlist = ifa;
ifa->ifa_addr = (struct sockaddr *)sdl;
sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
ifa->ifa_netmask = (struct sockaddr *)sdl;
sdl->sdl_len = masklen;
while (namelen != 0)
sdl->sdl_data[--namelen] = 0xff;
m2IfTableUpdate(ifp, M2_IF_TABLE_INSERT);
/* XXX Temporary fix before changing ethernet drivers */
s = splnet ();
if (ifp->if_output == ether_output)
ether_ifattach (ifp);
splx (s);
}
/***************************************************************************
*
* if_dettach - dettaches an interface from the linked list of interfaces
*
* if_dettach is used to dettach an interface from the linked list of
* all available interfaces. This function needs to be used with
* if_down () when shutting down a network interface.
*/
void if_dettach (ifp)
struct ifnet *ifp; /* inteface pointer */
{
FAST struct ifnet ** pPtrIfp;
FAST struct ifaddr * pIfAddr;
FAST struct ifaddr ** pPtrIfAddr;
int s;
pPtrIfp = &ifnet;
s = splnet ();
while (*pPtrIfp != NULL)
{
if (*pPtrIfp == ifp)
{
pPtrIfAddr = &(*pPtrIfp)->if_addrlist;
while (*pPtrIfAddr != NULL)
{
pIfAddr = *pPtrIfAddr;
*pPtrIfAddr = (*pPtrIfAddr)->ifa_next;
#ifdef INET
if (pIfAddr->ifa_addr->sa_family == AF_INET)
in_ifaddr_remove (pIfAddr);
else
#endif /* INET */
{
IFAFREE (pIfAddr);
}
}
#ifdef INET
if ((*pPtrIfp)->pInmMblk != NULL)
in_delmulti ((*pPtrIfp)->pInmMblk, NULL);
#endif /* INET */
*pPtrIfp = (*pPtrIfp)->if_next;
break;
}
pPtrIfp = &(*pPtrIfp)->if_next;
}
/* Notify MIB-II of change */
ifAttachChange++;
m2IfTableUpdate(ifp, M2_IF_TABLE_REMOVE);
splx (s);
}
/*******************************************************************************
*
* ifIndexToIfp - obtain the ifnet pointer from the index
*
* This function obtains the ifnet pointer from the if_index.
* The interface index is unique for every new interface added.
*
* NOMANUAL
*
* RETURNS ifnet/NULL
*/
struct ifnet * ifIndexToIfp
(
int ifIndex /* index of the interface to find */
)
{
register struct ifnet * pIfp = NULL;
int s;
/* traverse the list of ifnet structures in the system */
s = splnet ();
for (pIfp = ifnet; pIfp != NULL; pIfp = pIfp->if_next)
{
if (pIfp->if_index == ifIndex)
break;
}
splx (s);
return (pIfp);
}
/*
* Locate an interface based on a complete address.
*/
/*ARGSUSED*/
struct ifaddr *
ifa_ifwithaddr(addr)
register struct sockaddr *addr;
{
register struct ifnet *ifp;
register struct ifaddr *ifa;
#define equal(a1, a2) \
(bcmp((caddr_t)(a1), (caddr_t)(a2), ((struct sockaddr *)(a1))->sa_len) == 0)
for (ifp = ifnet; ifp; ifp = ifp->if_next)
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family != addr->sa_family)
continue;
if (equal(addr, ifa->ifa_addr))
return (ifa);
if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr &&
equal(ifa->ifa_broadaddr, addr))
return (ifa);
}
return ((struct ifaddr *)0);
}
/*
* Locate the point to point interface with a given destination address.
*/
/*ARGSUSED*/
struct ifaddr *
ifa_ifwithdstaddr(addr)
register struct sockaddr *addr;
{
register struct ifnet *ifp;
register struct ifaddr *ifa;
for (ifp = ifnet; ifp; ifp = ifp->if_next)
if (ifp->if_flags & IFF_POINTOPOINT)
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family != addr->sa_family)
continue;
if (equal(addr, ifa->ifa_dstaddr))
return (ifa);
}
return ((struct ifaddr *)0);
}
/*
* Find an interface on a specific network. If many, choice
* is most specific found.
*/
struct ifaddr *
ifa_ifwithnet(addr)
struct sockaddr *addr;
{
register struct ifnet *ifp;
register struct ifaddr *ifa;
struct ifaddr *ifa_maybe = (struct ifaddr *) 0;
u_int af = addr->sa_family;
char *addr_data = addr->sa_data, *cplim;
if (af == AF_LINK) {
register struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
/* eliminated need for ifnet_addrs array*/
if (sdl->sdl_index && sdl->sdl_index <= if_index)
{
ifp = ifIndexToIfp (sdl->sdl_index);
for (ifa = ifp->if_addrlist; ifa != NULL; ifa = ifa->ifa_next)
if (ifa->ifa_addr->sa_family == af)
break;
return (ifa);
}
}
for (ifp = ifnet; ifp; ifp = ifp->if_next)
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
register char *cp, *cp2, *cp3;
if (ifa->ifa_addr->sa_family != af || ifa->ifa_netmask == 0)
next: continue;
cp = addr_data;
cp2 = ifa->ifa_addr->sa_data;
cp3 = ifa->ifa_netmask->sa_data;
cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
while (cp3 < cplim)
if ((*cp++ ^ *cp2++) & *cp3++)
goto next;
if (ifa_maybe == 0 ||
rn_refines((caddr_t)ifa->ifa_netmask,
(caddr_t)ifa_maybe->ifa_netmask))
ifa_maybe = ifa;
}
return (ifa_maybe);
}
/*
* Find an interface using a specific address family
*/
struct ifaddr *
ifa_ifwithaf(af)
register int af;
{
register struct ifnet *ifp;
register struct ifaddr *ifa;
for (ifp = ifnet; ifp; ifp = ifp->if_next)
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
if (ifa->ifa_addr->sa_family == af)
return (ifa);
return ((struct ifaddr *)0);
}
/*
* Find an interface address specific to an interface best matching
* a given address.
*/
struct ifaddr *
ifaof_ifpforaddr(addr, ifp)
struct sockaddr *addr;
register struct ifnet *ifp;
{
register struct ifaddr *ifa;
register char *cp, *cp2, *cp3;
register char *cplim;
struct ifaddr *ifa_maybe = 0;
u_int af = addr->sa_family;
if (af >= AF_MAX)
return (0);
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family != af)
continue;
ifa_maybe = ifa;
if (ifa->ifa_netmask == 0) {
if (equal(addr, ifa->ifa_addr) ||
(ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr)))
return (ifa);
continue;
}
cp = addr->sa_data;
cp2 = ifa->ifa_addr->sa_data;
cp3 = ifa->ifa_netmask->sa_data;
cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
for (; cp3 < cplim; cp3++)
if ((*cp++ ^ *cp2++) & *cp3)
break;
if (cp3 == cplim)
return (ifa);
}
return (ifa_maybe);
}
/*
* Find an interface address for a specified destination or gateway
*/
struct ifaddr *
ifa_ifwithroute(flags, dst, gateway)
int flags;
struct sockaddr *dst, *gateway;
{
register struct ifaddr *ifa;
if ((flags & RTF_GATEWAY) == 0) {
/*
* If we are adding a route to an interface,
* and the interface is a pt to pt link
* we should search for the destination
* as our clue to the interface. Otherwise
* we can use the local address.
*/
ifa = 0;
if (flags & RTF_HOST)
ifa = ifa_ifwithdstaddr(dst);
if (ifa == 0)
ifa = ifa_ifwithaddr(gateway);
} else {
/*
* If we are adding a route to a remote net
* or host, the gateway may still be on the
* other end of a pt to pt link.
*/
ifa = ifa_ifwithdstaddr(gateway);
}
if (ifa == 0)
ifa = ifa_ifwithnet(gateway);
if (ifa == 0) {
struct rtentry *rt = rtalloc1(dst, 0);
if (rt == 0)
return (0);
rt->rt_refcnt--;
if ((ifa = rt->rt_ifa) == 0)
return (0);
}
if (ifa->ifa_addr->sa_family != dst->sa_family) {
struct ifaddr *oifa = ifa;
ifa = ifaof_ifpforaddr(dst, ifa->ifa_ifp);
if (ifa == 0)
ifa = oifa;
}
return (ifa);
}
/* free the interface address */
void
ifafree(ifa)
register struct ifaddr *ifa;
{
if (ifa == NULL)
panic("ifafree");
if (ifa->ifa_refcnt == 0)
{
FREE(ifa, MT_IFADDR);
}
else
ifa->ifa_refcnt--;
}
/*
* Default action when installing a route with a Link Level gateway.
* Lookup an appropriate real ifa to point to.
* This should be moved to /sys/net/link.c eventually.
*/
void
link_rtrequest(cmd, rt, sa)
int cmd;
register struct rtentry *rt;
struct sockaddr *sa;
{
register struct ifaddr *ifa;
struct sockaddr *dst;
struct ifnet *ifp;
if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
return;
if ((ifa = ifaof_ifpforaddr(dst, ifp))) {
IFAFREE(rt->rt_ifa);
rt->rt_ifa = ifa;
ifa->ifa_refcnt++;
if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
ifa->ifa_rtrequest(cmd, rt, sa);
}
}
/*
* Mark an interface down and notify protocols of
* the transition.
* NOTE: must be called at splnet or eqivalent.
*/
void
if_down(ifp)
register struct ifnet *ifp;
{
register struct ifaddr *ifa;
ifp->if_flags &= ~IFF_UP;
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
if_qflush(&ifp->if_snd);
if (_rtIfaceMsgHook)
(*_rtIfaceMsgHook) (ifp);
}
/*
* Mark an interface up and notify protocols of
* the transition.
* NOTE: must be called at splnet or equivalent.
*/
void
if_up(ifp)
register struct ifnet *ifp;
{
ifp->if_flags |= IFF_UP;
#ifdef notyet
{
register struct ifaddr *ifa;
/* this has no effect on IP, and will kill all ISO connections XXX */
for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
pfctlinput(PRC_IFUP, ifa->ifa_addr);
}
#endif
if (_rtIfaceMsgHook)
(*_rtIfaceMsgHook) (ifp);
}
/*
* Flush an interface queue.
*/
void
if_qflush(ifq)
register struct ifqueue *ifq;
{
register struct mbuf *m, *n;
n = ifq->ifq_head;
while ((m = n)) {
n = m->m_act;
m_freem(m);
}
ifq->ifq_head = 0;
ifq->ifq_tail = 0;
ifq->ifq_len = 0;
}
/*
* Handle interface watchdog timer routines. Called
* from softclock, we decrement timers (if set) and
* call the appropriate interface routine on expiration.
*/
void if_slowtimo (void)
{
register struct ifnet *ifp;
for (ifp = ifnet; ifp; ifp = ifp->if_next)
{
if (ifp->if_timer == 0 || --ifp->if_timer)
continue;
if (ifp->if_watchdog)
(*ifp->if_watchdog)(ifp->if_unit);
}
/* XXX using watchdogs good idea? calculate clock rate once only -gae */
wdStart (ifslowtimoWd, sysClkRateGet()/IFNET_SLOWHZ,
(FUNCPTR) netJobAdd, (int) if_slowtimo);
}
/* ifunit () has been moved to ifLib.c */
/*
* Interface ioctls.
*/
int
ifioctl(so, cmd, data)
struct socket *so;
u_long cmd;
caddr_t data;
{
register struct ifnet *ifp;
register struct ifreq *ifr;
switch (cmd) {
case SIOCGIFCONF:
case OSIOCGIFCONF:
return (ifconf(cmd, data));
#ifdef INET
case SIOCSARP:
case SIOCDARP:
/* FALL THROUGH */
case SIOCGARP:
return (arpioctl(cmd, data));
#endif /* INET */
}
ifr = (struct ifreq *)data;
ifp = ifunit(ifr->ifr_name);
if (ifp == 0)
return (ENXIO);
switch (cmd) {
case SIOCGIFFLAGS:
ifr->ifr_flags = ifp->if_flags;
break;
case SIOCGIFMETRIC:
ifr->ifr_metric = ifp->if_metric;
break;
case SIOCSIFFLAGS:
if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) {
int s = splimp();
if_down(ifp);
splx(s);
m2SetIfLastChange(ifp->if_name, ifp->if_unit,
ifp->if_flags);
}
if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) {
int s = splimp();
if_up(ifp);
splx(s);
m2SetIfLastChange(ifp->if_name, ifp->if_unit,
ifp->if_flags);
}
ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
(ifr->ifr_flags &~ IFF_CANTCHANGE);
ifr->ifr_flags = ifp->if_flags;
if (ifp->if_ioctl)
(void) (*ifp->if_ioctl)(ifp, cmd, data);
break;
case SIOCSIFMETRIC:
ifp->if_metric = ifr->ifr_metric;
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
if (ifp->if_ioctl == 0)
return (EOPNOTSUPP);
return ((*ifp->if_ioctl)(ifp, cmd, data));
default:
if (so->so_proto == 0)
return (EOPNOTSUPP);
#ifndef COMPAT_43
return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
cmd, data, ifp));
#else
{
int error = 0;
int ocmd = cmd;
switch (cmd) {
case SIOCSIFDSTADDR:
case SIOCSIFADDR:
case SIOCSIFBRDADDR:
case SIOCSIFNETMASK:
#if _BYTE_ORDER != _BIG_ENDIAN
if (ifr->ifr_addr.sa_family == 0 &&
ifr->ifr_addr.sa_len < 16) {
ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
ifr->ifr_addr.sa_len = 16;
}
#else
if (ifr->ifr_addr.sa_len == 0)
ifr->ifr_addr.sa_len = 16;
#endif
break;
case OSIOCGIFADDR:
cmd = SIOCGIFADDR;
break;
case OSIOCGIFDSTADDR:
cmd = SIOCGIFDSTADDR;
break;
case OSIOCGIFBRDADDR:
cmd = SIOCGIFBRDADDR;
break;
case OSIOCGIFNETMASK:
cmd = SIOCGIFNETMASK;
}
error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
cmd, data, ifp));
switch (ocmd) {
case OSIOCGIFADDR:
case OSIOCGIFDSTADDR:
case OSIOCGIFBRDADDR:
case OSIOCGIFNETMASK:
*(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
}
return (error);
}
#endif
}
return (0);
}
/*
* Return interface configuration
* of system. List may be used
* in later ioctl's (above) to get
* other information.
*/
/*ARGSUSED*/
int
ifconf(cmd, data)
int cmd;
caddr_t data;
{
register struct ifconf *ifc = (struct ifconf *)data;
register struct ifnet *ifp = ifnet;
register struct ifaddr *ifa;
register char *cp, *ep;
struct ifreq ifr, *ifrp;
int space = ifc->ifc_len, error = 0;
ifrp = ifc->ifc_req;
ep = ifr.ifr_name + sizeof (ifr.ifr_name) - 2;
for (; space > sizeof (ifr) && ifp; ifp = ifp->if_next) {
strncpy(ifr.ifr_name, ifp->if_name, sizeof(ifr.ifr_name) - 2);
for (cp = ifr.ifr_name; cp < ep && *cp; cp++)
continue;
*cp++ = '0' + ifp->if_unit; *cp = '\0';
if ((ifa = ifp->if_addrlist) == 0) {
bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
sizeof(ifr));
if (error)
break;
space -= sizeof (ifr), ifrp++;
} else
for ( ; space > sizeof (ifr) && ifa; ifa = ifa->ifa_next) {
register struct sockaddr *sa = ifa->ifa_addr;
#ifdef COMPAT_43
if (cmd == OSIOCGIFCONF) {
struct osockaddr *osa =
(struct osockaddr *)&ifr.ifr_addr;
ifr.ifr_addr = *sa;
osa->sa_family = sa->sa_family;
error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
sizeof (ifr));
ifrp++;
} else
#endif
if (sa->sa_len <= sizeof(*sa)) {
ifr.ifr_addr = *sa;
error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
sizeof (ifr));
ifrp++;
} else {
space -= sa->sa_len - sizeof(*sa);
if (space < sizeof (ifr))
break;
error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
sizeof (ifr.ifr_name));
if (error == 0)
error = copyout((caddr_t)sa,
(caddr_t)&ifrp->ifr_addr, sa->sa_len);
ifrp = (struct ifreq *)
(sa->sa_len + (caddr_t)&ifrp->ifr_addr);
}
if (error)
break;
space -= sizeof (ifr);
}
}
ifc->ifc_len -= space;
return (error);
}
/*
* Set/clear promiscuous mode on interface ifp based on the truth value
* of pswitch. The calls are reference counted so that only the first
* "on" request actually has an effect, as does the final "off" request.
* Results are undefined if the "off" and "on" requests are not matched.
*/
int
ifpromisc(ifp, pswitch)
struct ifnet *ifp;
int pswitch;
{
struct ifreq ifr;
/*
* If the device is not configured up, we cannot put it in
* promiscuous mode.
*/
if ((ifp->if_flags & IFF_UP) == 0)
return (ENETDOWN);
if (pswitch) {
if (ifp->if_pcount++ != 0)
return (0);
ifp->if_flags |= IFF_PROMISC;
} else {
if (--ifp->if_pcount > 0)
return (0);
ifp->if_flags &= ~IFF_PROMISC;
}
ifr.ifr_flags = ifp->if_flags;
return ((*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr));
}
static char *
sprint_d(n, buf, buflen)
u_int n;
char *buf;
int buflen;
{
register char *cp = buf + buflen - 1;
*cp = 0;
do {
cp--;
*cp = "0123456789"[n % 10];
n /= 10;
} while (n != 0);
return (cp);
}