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freebsd-skq/sys/netatm/atm_if.c
rwatson ea5253bc2b Fix use after free bug: use temporary variable to hold next entry in linked 
list while freeing current entry, rather than using the free'd entry's next
pointer.

Found with:	Coverity Prevent(tm)
CID:		1333
2007-04-03 12:45:10 +00:00

1148 lines
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/*-
* ===================================
* HARP | Host ATM Research Platform
* ===================================
*
*
* This Host ATM Research Platform ("HARP") file (the "Software") is
* made available by Network Computing Services, Inc. ("NetworkCS")
* "AS IS". NetworkCS does not provide maintenance, improvements or
* support of any kind.
*
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
* In no event shall NetworkCS be responsible for any damages, including
* but not limited to consequential damages, arising from or relating to
* any use of the Software or related support.
*
* Copyright 1994-1998 Network Computing Services, Inc.
*
* Copies of this Software may be made, however, the above copyright
* notice must be reproduced on all copies.
*/
/*
* Core ATM Services
* -----------------
*
* ATM interface management
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/sockio.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_dl.h>
#include <net/route.h>
#include <net/bpf.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netatm/port.h>
#include <netatm/queue.h>
#include <netatm/atm.h>
#include <netatm/atm_sys.h>
#include <netatm/atm_sap.h>
#include <netatm/atm_cm.h>
#include <netatm/atm_if.h>
#include <netatm/atm_ioctl.h>
#include <netatm/atm_sigmgr.h>
#include <netatm/atm_stack.h>
#include <netatm/atm_pcb.h>
#include <netatm/atm_var.h>
/*
* Local functions
*/
static int atm_physif_ioctl(int, caddr_t, caddr_t);
static int atm_if_ioctl(struct ifnet *, u_long, caddr_t);
static int atm_ifparse(const char *, char *, size_t, int *);
/*
* Local variables
*/
static int (*atm_ifouttbl[AF_MAX+1])
(struct ifnet *, KBuffer *, struct sockaddr *)
= {NULL};
/*
* Register an ATM physical interface
*
* Each ATM device interface must register itself here upon completing
* its internal initialization. This applies to both linked and loaded
* device drivers. The interface must be registered before a signalling
* manager can be attached.
*
* Arguments:
* cup pointer to interface's common unit structure
* name pointer to device name string
* sdp pointer to interface's stack services
*
* Returns:
* 0 registration successful
* errno registration failed - reason indicated
*
*/
int
atm_physif_register(cup, name, sdp)
Cmn_unit *cup;
const char *name;
struct stack_defn *sdp;
{
struct atm_pif *pip;
int s;
/*
* See if we need to be initialized
*/
if (!atm_init)
atm_initialize();
/*
* Make sure we're not already registered
*/
if (cup->cu_flags & CUF_REGISTER) {
return (EALREADY);
}
s = splnet();
/*
* Make sure an interface is only registered once
*/
for (pip = atm_interface_head; pip != NULL; pip = pip->pif_next) {
if ((cup->cu_unit == pip->pif_unit) &&
(strcmp(name, pip->pif_name) == 0)) {
(void) splx(s);
return (EEXIST);
}
}
/*
* Fill in physical interface parameters
*/
pip = &cup->cu_pif;
pip->pif_name = name;
pip->pif_unit = cup->cu_unit;
pip->pif_flags = PIF_UP;
pip->pif_services = sdp;
pip->pif_ioctl = atm_physif_ioctl;
/*
* Link in the interface and mark us registered
*/
LINK2TAIL(pip, struct atm_pif, atm_interface_head, pif_next);
cup->cu_flags |= CUF_REGISTER;
(void) splx(s);
return (0);
}
/*
* De-register an ATM physical interface
*
* Each ATM interface must de-register itself before downing the interface.
* The interface's signalling manager will be detached and any network
* interface and VCC control blocks will be freed.
*
* Arguments:
* cup pointer to interface's common unit structure
*
* Returns:
* 0 de-registration successful
* errno de-registration failed - reason indicated
*
*/
int
atm_physif_deregister(cup)
Cmn_unit *cup;
{
struct atm_pif *pip = (struct atm_pif *)&cup->cu_pif;
Cmn_vcc *cvp, *cvp_next;
int err;
int s = splnet();
/*
* Detach and deregister, if needed
*/
if ((cup->cu_flags & CUF_REGISTER)) {
/*
* Detach from signalling manager
*/
if (pip->pif_sigmgr != NULL) {
err = atm_sigmgr_detach(pip);
if (err && (err != ENOENT)) {
(void) splx(s);
return (err);
}
}
/*
* Make sure signalling manager is detached
*/
if (pip->pif_sigmgr != NULL) {
(void) splx(s);
return (EBUSY);
}
/*
* Unlink interface
*/
UNLINK(pip, struct atm_pif, atm_interface_head, pif_next);
cup->cu_flags &= ~CUF_REGISTER;
}
/*
* Free all of our network interfaces
*/
atm_physif_freenifs(pip, cup->cu_nif_zone);
/*
* Free unit's vcc information
*/
cvp = cup->cu_vcc;
while (cvp) {
cvp_next = cvp->cv_next;
uma_zfree(cup->cu_vcc_zone, cvp);
cvp = cvp_next;
}
cup->cu_vcc = (Cmn_vcc *)NULL;
(void) splx(s);
return (0);
}
/*
* Free all network interfaces on a physical interface
*
* Arguments
* pip pointer to physical interface structure
*
* Returns
* none
*
*/
void
atm_physif_freenifs(pip, zone)
struct atm_pif *pip;
uma_zone_t zone;
{
struct atm_nif *nip = pip->pif_nif;
int s = splnet();
while ( nip )
{
/*
* atm_nif_detach zeros pointers - save so we can
* walk the chain.
*/
struct atm_nif *nipp = nip->nif_pnext;
/*
* Clean up network i/f trails
*/
atm_nif_detach(nip);
uma_zfree(zone, nip);
nip = nipp;
}
pip->pif_nif = (struct atm_nif *)NULL;
(void) splx(s);
return;
}
/*
* Handle physical interface ioctl's
*
* See <netatm/atm_ioctl.h> for definitions.
*
* Called at splnet.
*
* Arguments:
* code Ioctl function (sub)code
* data Data block. On input contains command,
* on output, contains results
* arg Optional code specific arguments
*
* Returns:
* 0 Request processed successfully
* errno Request failed - reason code
*
*/
static int
atm_physif_ioctl(code, data, arg)
int code;
caddr_t data;
caddr_t arg;
{
struct atminfreq *aip = (struct atminfreq *)data;
struct atmsetreq *asr = (struct atmsetreq *)data;
struct atm_pif *pip;
struct atm_nif *nip;
struct sigmgr *smp;
struct siginst *sip;
struct ifnet *ifp;
Cmn_unit *cup;
Atm_config *acp;
caddr_t buf = aip->air_buf_addr;
struct air_phy_stat_rsp *apsp;
struct air_int_rsp apr;
struct air_netif_rsp anr;
struct air_cfg_rsp acr;
u_int count;
size_t len;
size_t buf_len = aip->air_buf_len;
int err = 0;
char ifname[2*IFNAMSIZ];
struct ifaddr *ifa;
struct in_ifaddr *ia;
struct sockaddr_dl *sdl;
switch ( aip->air_opcode ) {
case AIOCS_INF_INT:
/*
* Get physical interface information
*/
aip = (struct atminfreq *)data;
pip = (struct atm_pif *)arg;
/*
* Make sure there's room in user buffer
*/
if (aip->air_buf_len < sizeof(apr)) {
err = ENOSPC;
break;
}
/*
* Fill in info to be returned
*/
bzero((caddr_t)&apr, sizeof(apr));
smp = pip->pif_sigmgr;
sip = pip->pif_siginst;
(void) snprintf(apr.anp_intf, sizeof(apr.anp_intf),
"%s%d", pip->pif_name, pip->pif_unit );
if ( pip->pif_nif )
{
strcpy(apr.anp_nif_pref, pip->pif_nif->nif_ifp->if_dname);
nip = pip->pif_nif;
while ( nip ) {
apr.anp_nif_cnt++;
nip = nip->nif_pnext;
}
}
if (sip) {
ATM_ADDR_COPY(&sip->si_addr, &apr.anp_addr);
ATM_ADDR_COPY(&sip->si_subaddr, &apr.anp_subaddr);
apr.anp_sig_proto = smp->sm_proto;
apr.anp_sig_state = sip->si_state;
}
/*
* Copy data to user buffer
*/
err = copyout((caddr_t)&apr, aip->air_buf_addr, sizeof(apr));
if (err)
break;
/*
* Update buffer pointer/count
*/
aip->air_buf_addr += sizeof(apr);
aip->air_buf_len -= sizeof(apr);
break;
case AIOCS_INF_NIF:
/*
* Get network interface information
*/
aip = (struct atminfreq *)data;
nip = (struct atm_nif *)arg;
ifp = nip->nif_ifp;
pip = nip->nif_pif;
/*
* Make sure there's room in user buffer
*/
if (aip->air_buf_len < sizeof(anr)) {
err = ENOSPC;
break;
}
/*
* Fill in info to be returned
*/
bzero((caddr_t)&anr, sizeof(anr));
(void) snprintf(anr.anp_intf, sizeof(anr.anp_intf),
"%s%d", ifp->if_dname, ifp->if_dunit);
IFP_TO_IA(ifp, ia);
if (ia) {
anr.anp_proto_addr = *ia->ia_ifa.ifa_addr;
}
(void) snprintf(anr.anp_phy_intf, sizeof(anr.anp_phy_intf),
"%s%d", pip->pif_name, pip->pif_unit);
/*
* Copy data to user buffer
*/
err = copyout((caddr_t)&anr, aip->air_buf_addr, sizeof(anr));
if (err)
break;
/*
* Update buffer pointer/count
*/
aip->air_buf_addr += sizeof(anr);
aip->air_buf_len -= sizeof(anr);
break;
case AIOCS_INF_PIS:
/*
* Get per interface statistics
*/
pip = (struct atm_pif *)arg;
if ( pip == NULL )
return ( ENXIO );
snprintf ( ifname, sizeof(ifname),
"%s%d", pip->pif_name, pip->pif_unit );
/*
* Cast response into users buffer
*/
apsp = (struct air_phy_stat_rsp *)buf;
/*
* Sanity check
*/
len = sizeof ( struct air_phy_stat_rsp );
if ( buf_len < len )
return ( ENOSPC );
/*
* Copy interface name into response
*/
if ((err = copyout ( ifname, apsp->app_intf, IFNAMSIZ)) != 0)
break;
/*
* Copy counters
*/
if ((err = copyout(&pip->pif_ipdus, &apsp->app_ipdus,
len - sizeof(apsp->app_intf))) != 0)
break;
/*
* Adjust buffer elements
*/
buf += len;
buf_len -= len;
aip->air_buf_addr = buf;
aip->air_buf_len = buf_len;
break;
case AIOCS_SET_NIF:
/*
* Set NIF - allow user to configure 1 or more logical
* interfaces per physical interface.
*/
/*
* Get pointer to physical interface structure from
* ioctl argument.
*/
pip = (struct atm_pif *)arg;
cup = (Cmn_unit *)pip;
/*
* Sanity check - are we already connected to something?
*/
if ( pip->pif_sigmgr )
{
err = EBUSY;
break;
}
/*
* Free any previously allocated NIFs
*/
atm_physif_freenifs(pip, cup->cu_nif_zone);
/*
* Add list of interfaces
*/
for ( count = 0; count < asr->asr_nif_cnt; count++ )
{
nip = uma_zalloc(cup->cu_nif_zone, M_WAITOK | M_ZERO);
if ( nip == NULL )
{
/*
* Destroy any successful nifs
*/
atm_physif_freenifs(pip, cup->cu_nif_zone);
err = ENOMEM;
break;
}
nip->nif_pif = pip;
ifp = nip->nif_ifp = if_alloc(IFT_IPOVERATM);
if (ifp == NULL) {
uma_zfree(cup->cu_nif_zone, nip);
/*
* Destroy any successful nifs
*/
atm_physif_freenifs(pip, cup->cu_nif_zone);
break;
}
strcpy ( nip->nif_name, asr->asr_nif_pref );
nip->nif_sel = count;
if_initname(ifp, nip->nif_name, count);
ifp->if_mtu = ATM_NIF_MTU;
ifp->if_flags = IFF_UP | IFF_BROADCAST;
ifp->if_drv_flags = IFF_DRV_RUNNING;
ifp->if_output = atm_ifoutput;
ifp->if_ioctl = atm_if_ioctl;
ifp->if_snd.ifq_maxlen = ifqmaxlen;
switch ( cup->cu_config.ac_media ) {
case MEDIA_TAXI_100:
ifp->if_baudrate = 100000000;
break;
case MEDIA_TAXI_140:
ifp->if_baudrate = 140000000;
break;
case MEDIA_OC3C:
case MEDIA_OC12C:
case MEDIA_UTP155:
ifp->if_baudrate = 155000000;
break;
case MEDIA_UTP25:
ifp->if_baudrate = 25600000;
break;
case MEDIA_VIRTUAL:
ifp->if_baudrate = 100000000; /* XXX */
break;
case MEDIA_DSL:
ifp->if_baudrate = 2500000; /* XXX */
break;
case MEDIA_UNKNOWN:
ifp->if_baudrate = 9600;
break;
}
if ((err = atm_nif_attach(nip)) != 0) {
if_free(nip->nif_ifp);
uma_zfree(cup->cu_nif_zone, nip);
/*
* Destroy any successful nifs
*/
atm_physif_freenifs(pip, cup->cu_nif_zone);
break;
}
/*
* Set macaddr in <Link> address
*/
ifp->if_addrlen = 6;
ifa = ifp->if_addr;
if ( ifa ) {
sdl = (struct sockaddr_dl *)
ifa->ifa_addr;
sdl->sdl_type = IFT_ETHER;
sdl->sdl_alen = ifp->if_addrlen;
bcopy ( (caddr_t)&cup->cu_config.ac_macaddr,
LLADDR(sdl), ifp->if_addrlen );
}
}
break;
case AIOCS_INF_CFG:
/*
* Get adapter configuration information
*/
aip = (struct atminfreq *)data;
pip = (struct atm_pif *)arg;
cup = (Cmn_unit *)pip;
acp = &cup->cu_config;
/*
* Make sure there's room in user buffer
*/
if (aip->air_buf_len < sizeof(acr)) {
err = ENOSPC;
break;
}
/*
* Fill in info to be returned
*/
bzero((caddr_t)&acr, sizeof(acr));
(void) snprintf(acr.acp_intf, sizeof(acr.acp_intf),
"%s%d", pip->pif_name, pip->pif_unit);
bcopy((caddr_t)acp, (caddr_t)&acr.acp_cfg,
sizeof(Atm_config));
/*
* Copy data to user buffer
*/
err = copyout((caddr_t)&acr, aip->air_buf_addr,
sizeof(acr));
if (err)
break;
/*
* Update buffer pointer/count
*/
aip->air_buf_addr += sizeof(acr);
aip->air_buf_len -= sizeof(acr);
break;
case AIOCS_INF_VST:
/*
* Pass off to device-specific handler
*/
cup = (Cmn_unit *)arg;
if (cup == NULL)
err = ENXIO;
else
err = (*cup->cu_ioctl)(code, data, arg);
break;
default:
err = ENOSYS;
}
return ( err );
}
/*
* Register a Network Convergence Module
*
* Each ATM network convergence module must register itself here before
* it will receive network interface status notifications.
*
* Arguments:
* ncp pointer to network convergence definition structure
*
* Returns:
* 0 registration successful
* errno registration failed - reason indicated
*
*/
int
atm_netconv_register(ncp)
struct atm_ncm *ncp;
{
struct atm_ncm *tdp;
int s = splnet();
/*
* See if we need to be initialized
*/
if (!atm_init)
atm_initialize();
/*
* Validate protocol family
*/
if (ncp->ncm_family > AF_MAX) {
(void) splx(s);
return (EINVAL);
}
/*
* Ensure no duplicates
*/
for (tdp = atm_netconv_head; tdp != NULL; tdp = tdp->ncm_next) {
if (tdp->ncm_family == ncp->ncm_family) {
(void) splx(s);
return (EEXIST);
}
}
/*
* Add module to list
*/
LINK2TAIL(ncp, struct atm_ncm, atm_netconv_head, ncm_next);
/*
* Add new interface output function
*/
atm_ifouttbl[ncp->ncm_family] = ncp->ncm_ifoutput;
(void) splx(s);
return (0);
}
/*
* De-register an ATM Network Convergence Module
*
* Each ATM network convergence provider must de-register its registered
* service(s) before terminating. Specifically, loaded kernel modules
* must de-register their services before unloading themselves.
*
* Arguments:
* ncp pointer to network convergence definition structure
*
* Returns:
* 0 de-registration successful
* errno de-registration failed - reason indicated
*
*/
int
atm_netconv_deregister(ncp)
struct atm_ncm *ncp;
{
int found, s = splnet();
/*
* Remove module from list
*/
UNLINKF(ncp, struct atm_ncm, atm_netconv_head, ncm_next, found);
if (!found) {
(void) splx(s);
return (ENOENT);
}
/*
* Remove module's interface output function
*/
atm_ifouttbl[ncp->ncm_family] = NULL;
(void) splx(s);
return (0);
}
/*
* Attach an ATM Network Interface
*
* Before an ATM network interface can be used by the system, the owning
* device interface must attach the network interface using this function.
* The physical interface for this network interface must have been previously
* registered (using atm_interface_register). The network interface will be
* added to the kernel's interface list and to the physical interface's list.
* The caller is responsible for initializing the control block fields.
*
* Arguments:
* nip pointer to atm network interface control block
*
* Returns:
* 0 attach successful
* errno attach failed - reason indicated
*
*/
int
atm_nif_attach(nip)
struct atm_nif *nip;
{
struct atm_pif *pip, *pip2;
struct ifnet *ifp;
struct atm_ncm *ncp;
int s;
ifp = nip->nif_ifp;
if (ifp == NULL)
return (ENOSPC);
pip = nip->nif_pif;
s = splimp();
/*
* Verify physical interface is registered
*/
for (pip2 = atm_interface_head; pip2 != NULL; pip2 = pip2->pif_next) {
if (pip == pip2)
break;
}
if ((pip == NULL) || (pip2 == NULL)) {
(void) splx(s);
return (EFAULT);
}
/*
* Add to system interface list
*/
if_attach(ifp);
/*
* Add to BPF interface list
* DLT_ATM_RFC_1483 cannot be used because both NULL and LLC/SNAP could
* be provisioned
*/
bpfattach(ifp, DLT_ATM_CLIP, T_ATM_LLC_MAX_LEN);
/*
* Add to physical interface list
*/
LINK2TAIL(nip, struct atm_nif, pip->pif_nif, nif_pnext);
/*
* Notify network convergence modules of new network i/f
*/
for (ncp = atm_netconv_head; ncp; ncp = ncp->ncm_next) {
int err;
err = (*ncp->ncm_stat)(NCM_ATTACH, nip, 0);
if (err) {
atm_nif_detach(nip);
(void) splx(s);
return (err);
}
}
(void) splx(s);
return (0);
}
/*
* Detach an ATM Network Interface
*
* Before an ATM network interface control block can be freed, all kernel
* references to/from this block must be released. This function will delete
* all routing references to the interface and free all interface addresses
* for the interface. The network interface will then be removed from the
* kernel's interface list and from the owning physical interface's list.
* The caller is responsible for free'ing the control block.
*
* Arguments:
* nip pointer to atm network interface control block
*
* Returns:
* none
*
*/
void
atm_nif_detach(nip)
struct atm_nif *nip;
{
struct atm_ncm *ncp;
int s;
struct ifnet *ifp = nip->nif_ifp;
s = splimp();
/*
* Notify convergence modules of network i/f demise
*/
for (ncp = atm_netconv_head; ncp; ncp = ncp->ncm_next) {
(void) (*ncp->ncm_stat)(NCM_DETACH, nip, 0);
}
/*
* Remove from BPF interface list
*/
bpfdetach(ifp);
/*
* Free all interface routes and addresses,
* delete all remaining routes using this interface,
* then remove from the system interface list
*/
if_detach(ifp);
if_free(ifp);
/*
* Remove from physical interface list
*/
UNLINK(nip, struct atm_nif, nip->nif_pif->pif_nif, nif_pnext);
(void) splx(s);
}
/*
* Set an ATM Network Interface address
*
* This is called from a device interface when processing an SIOCSIFADDR
* ioctl request. We just notify all convergence modules of the new address
* and hope everyone has non-overlapping interests, since if someone reports
* an error we don't go back and tell everyone to undo the change.
*
* Arguments:
* nip pointer to atm network interface control block
* ifa pointer to new interface address
*
* Returns:
* 0 set successful
* errno set failed - reason indicated
*
*/
int
atm_nif_setaddr(nip, ifa)
struct atm_nif *nip;
struct ifaddr *ifa;
{
struct atm_ncm *ncp;
int err = 0, s = splnet();
/*
* Notify convergence modules of network i/f change
*/
for (ncp = atm_netconv_head; ncp; ncp = ncp->ncm_next) {
err = (*ncp->ncm_stat)(NCM_SETADDR, nip, (intptr_t)ifa);
if (err)
break;
}
(void) splx(s);
return (err);
}
/*
* ATM Interface Packet Output
*
* All ATM network interfaces must have their ifnet if_output address set to
* this function. Since no existing network layer code is to be modified
* for ATM support, this function serves as the hook to allow network output
* packets to be assigned to their proper outbound VCC. Each network address
* family which is to be supported over ATM must be assigned an output
* packet processing function via atm_netconv_register().
*
* Arguments:
* ifp pointer to ifnet structure
* m pointer to packet buffer chain to be output
* dst pointer to packet's network destination address
*
* Returns:
* 0 packet queued to interface
* errno output failed - reason indicated
*
*/
int
atm_ifoutput(ifp, m, dst, rt)
struct ifnet *ifp;
KBuffer *m;
struct sockaddr *dst;
struct rtentry *rt;
{
u_short fam = dst->sa_family;
int (*func)(struct ifnet *, KBuffer *,
struct sockaddr *);
/*
* Validate address family
*/
if (fam > AF_MAX) {
KB_FREEALL(m);
return (EAFNOSUPPORT);
}
/*
* Hand packet off for dst-to-VCC mapping
*/
func = atm_ifouttbl[fam];
if (func == NULL) {
KB_FREEALL(m);
return (EAFNOSUPPORT);
}
return ((*func)(ifp, m, dst));
}
/*
* Handle interface ioctl requests.
*
* Arguments:
* ifp pointer to network interface structure
* cmd IOCTL cmd
* data arguments to/from ioctl
*
* Returns:
* error errno value
*/
static int
atm_if_ioctl(ifp, cmd, data)
struct ifnet *ifp;
u_long cmd;
caddr_t data;
{
register struct ifreq *ifr = (struct ifreq *)data;
struct atm_nif *nip = IFP2ANIF(ifp);
int error = 0;
int s = splnet();
switch ( cmd )
{
case SIOCGIFADDR:
bcopy ( (caddr_t)&(nip->nif_pif->pif_macaddr),
(caddr_t)ifr->ifr_addr.sa_data,
sizeof(struct mac_addr) );
break;
case SIOCSIFADDR:
error = atm_nif_setaddr ( nip, (struct ifaddr *)data);
ifp->if_flags |= IFF_UP | IFF_BROADCAST;
ifp->if_drv_flags |= IFF_DRV_RUNNING;
break;
case SIOCGIFFLAGS:
*(int *)data = ifp->if_flags;
break;
case SIOCSIFFLAGS:
break;
default:
error = EINVAL;
break;
}
(void) splx(s);
return ( error );
}
/*
* Parse interface name
*
* Parses an interface name string into a name and a unit component.
*
* Arguments:
* name pointer to interface name string
* namep address to store interface name
* size size available at namep
* unitp address to store interface unit number
*
* Returns:
* 0 name parsed
* else parse error
*
*/
static int
atm_ifparse(const char *name, char *namep, size_t size, int *unitp)
{
const char *cp;
char *np;
size_t len = 0;
int unit = 0;
/*
* Separate supplied string into name and unit parts.
*/
cp = name;
np = namep;
while (*cp) {
if (*cp >= '0' && *cp <= '9')
break;
if (++len >= size)
return (-1);
*np++ = *cp++;
}
*np = '\0';
while (*cp && *cp >= '0' && *cp <= '9')
unit = 10 * unit + *cp++ - '0';
*unitp = unit;
return (0);
}
/*
* Locate ATM physical interface via name
*
* Uses the supplied interface name string to locate a registered
* ATM physical interface.
*
* Arguments:
* name pointer to interface name string
*
* Returns:
* 0 interface not found
* else pointer to atm physical interface structure
*
*/
struct atm_pif *
atm_pifname(name)
char *name;
{
struct atm_pif *pip;
char n[IFNAMSIZ];
int unit;
/*
* Break down name
*/
if (atm_ifparse(name, n, sizeof(n), &unit))
return ((struct atm_pif *)0);
/*
* Look for the physical interface
*/
for (pip = atm_interface_head; pip; pip = pip->pif_next) {
if ((pip->pif_unit == unit) && (strcmp(pip->pif_name, n) == 0))
break;
}
return (pip);
}
/*
* Locate ATM network interface via name
*
* Uses the supplied interface name string to locate an ATM network interface.
*
* Arguments:
* name pointer to interface name string
*
* Returns:
* 0 interface not found
* else pointer to atm network interface structure
*
*/
struct atm_nif *
atm_nifname(name)
char *name;
{
struct atm_pif *pip;
struct atm_nif *nip;
char n[IFNAMSIZ];
int unit;
/*
* Break down name
*/
if (atm_ifparse(name, n, sizeof(n), &unit))
return ((struct atm_nif *)0);
/*
* Search thru each physical interface
*/
for (pip = atm_interface_head; pip; pip = pip->pif_next) {
/*
* Looking for network interface
*/
for (nip = pip->pif_nif; nip; nip = nip->nif_pnext) {
struct ifnet *ifp = (struct ifnet *)nip;
if ((ifp->if_dunit == unit) &&
(strcmp(ifp->if_dname, n) == 0))
return (nip);
}
}
return (NULL);
}
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