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freebsd-dev/sys/netatm/uni/uniarp.c
Archie Cobbs 2127f26023 Examine all occurrences of sprintf(), strcat(), and str[n]cpy() 
for possible buffer overflow problems. Replaced most sprintf()'s
with snprintf(); for others cases, added terminating NUL bytes where
appropriate, replaced constants like "16" with sizeof(), etc.

These changes include several bug fixes, but most changes are for
maintainability's sake. Any instance where it wasn't "immediately
obvious" that a buffer overflow could not occur was made safer.

Reviewed by:	Bruce Evans <bde@zeta.org.au>
Reviewed by:	Matthew Dillon <dillon@apollo.backplane.com>
Reviewed by:	Mike Spengler <mks@networkcs.com>
1998-12-04 22:54:57 +00:00

1234 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.
*
* @(#) $Id: uniarp.c,v 1.3 1998/10/31 20:07:00 phk Exp $
*
*/
/*
* ATM Forum UNI Support
* ---------------------
*
* UNI ATMARP support (RFC1577)
*
*/
#include <netatm/kern_include.h>
#include <netatm/ipatm/ipatm_var.h>
#include <netatm/ipatm/ipatm_serv.h>
#include <netatm/uni/unisig_var.h>
#include <netatm/uni/uniip_var.h>
#ifndef lint
__RCSID("@(#) $Id: uniarp.c,v 1.3 1998/10/31 20:07:00 phk Exp $");
#endif
/*
* Global variables
*/
struct uniarp *uniarp_arptab[UNIARP_HASHSIZ] = {NULL};
struct uniarp *uniarp_nomaptab = NULL;
struct uniarp *uniarp_pvctab = NULL;
struct atm_time uniarp_timer = {0, 0}; /* Aging timer */
struct uniarp_stat uniarp_stat = {0};
int uniarp_print = 0;
Atm_endpoint uniarp_endpt = {
NULL,
ENDPT_ATMARP,
uniarp_ioctl,
uniarp_getname,
uniarp_connected,
uniarp_cleared,
NULL,
NULL,
NULL,
NULL,
uniarp_cpcs_data,
NULL,
NULL,
NULL,
NULL
};
struct sp_info uniarp_pool = {
"uni arp pool", /* si_name */
sizeof(struct uniarp), /* si_blksiz */
10, /* si_blkcnt */
200 /* si_maxallow */
};
/*
* Local variables
*/
static void uniarp_server_mode __P((struct uniip *));
static void uniarp_client_mode __P((struct uniip *, Atm_addr *));
/*
* Process module loading notification
*
* Called whenever the uni module is initializing.
*
* Arguments:
* none
*
* Returns:
* 0 initialization successful
* errno initialization failed - reason indicated
*
*/
int
uniarp_start()
{
int err;
/*
* Register our endpoint
*/
err = atm_endpoint_register(&uniarp_endpt);
return (err);
}
/*
* Process module unloading notification
*
* Called whenever the uni module is about to be unloaded. All signalling
* instances will have been previously detached. All uniarp resources
* must be freed now.
*
* Arguments:
* none
*
* Returns:
* none
*
*/
void
uniarp_stop()
{
int i;
/*
* Make sure the arp table is empty
*/
for (i = 0; i < UNIARP_HASHSIZ; i++) {
if (uniarp_arptab[i] != NULL)
panic("uniarp_stop: arp table not empty");
}
/*
* Cancel timers
*/
(void) atm_untimeout(&uniarp_timer);
/*
* De-register ourselves
*/
(void) atm_endpoint_deregister(&uniarp_endpt);
/*
* Free our storage pools
*/
atm_release_pool(&uniarp_pool);
}
/*
* Process IP Network Interface Activation
*
* Called whenever an IP network interface becomes active.
*
* Called at splnet.
*
* Arguments:
* uip pointer to UNI IP interface
*
* Returns:
* none
*
*/
void
uniarp_ipact(uip)
struct uniip *uip;
{
struct unisig *usp;
ATM_DEBUG1("uniarp_ipact: uip=%p\n", uip);
/*
* Set initial state
*/
uip->uip_arpstate = UIAS_NOTCONF;
uip->uip_arpsvratm.address_format = T_ATM_ABSENT;
uip->uip_arpsvratm.address_length = 0;
uip->uip_arpsvrsub.address_format = T_ATM_ABSENT;
uip->uip_arpsvrsub.address_length = 0;
usp = (struct unisig *)uip->uip_ipnif->inf_nif->nif_pif->pif_siginst;
if (usp->us_addr.address_format != T_ATM_ABSENT)
uip->uip_flags |= UIF_IFADDR;
/*
* Make sure aging timer is running
*/
if ((uniarp_timer.ti_flag & TIF_QUEUED) == 0)
atm_timeout(&uniarp_timer, UNIARP_AGING, uniarp_aging);
return;
}
/*
* Process IP Network Interface Deactivation
*
* Called whenever an IP network interface becomes inactive. All VCCs
* for this interface should already have been closed.
*
* Called at splnet.
*
* Arguments:
* uip pointer to UNI IP interface
*
* Returns:
* none
*
*/
void
uniarp_ipdact(uip)
struct uniip *uip;
{
struct uniarp *uap, *unext;
int i;
ATM_DEBUG1("uniarp_ipdact: uip=%p\n", uip);
/*
* Delete all interface entries
*/
for (i = 0; i < UNIARP_HASHSIZ; i++) {
for (uap = uniarp_arptab[i]; uap; uap = unext) {
unext = uap->ua_next;
if (uap->ua_intf != uip)
continue;
/*
* All VCCs should (better) be gone by now
*/
if (uap->ua_ivp)
panic("uniarp_ipdact: entry not empty");
/*
* Clean up any loose ends
*/
UNIARP_CANCEL(uap);
/*
* Delete entry from arp table and free entry
*/
UNIARP_DELETE(uap);
atm_free((caddr_t)uap);
}
}
/*
* Clean up 'nomap' table
*/
for (uap = uniarp_nomaptab; uap; uap = unext) {
unext = uap->ua_next;
if (uap->ua_intf != uip)
continue;
/*
* All VCCs should (better) be gone by now
*/
if (uap->ua_ivp)
panic("uniarp_ipdact: entry not empty");
/*
* Clean up any loose ends
*/
UNIARP_CANCEL(uap);
/*
* Delete entry from 'no map' table and free entry
*/
UNLINK(uap, struct uniarp, uniarp_nomaptab, ua_next);
atm_free((caddr_t)uap);
}
/*
* Also clean up pvc table
*/
for (uap = uniarp_pvctab; uap; uap = unext) {
unext = uap->ua_next;
if (uap->ua_intf != uip)
continue;
/*
* All PVCs should (better) be gone by now
*/
panic("uniarp_ipdact: pvc table not empty");
}
/*
* Cancel arp interface timer
*/
UNIIP_ARP_CANCEL(uip);
/*
* Stop aging timer if this is the last active interface
*/
if (uniip_head == uip && uip->uip_next == NULL)
(void) atm_untimeout(&uniarp_timer);
}
/*
* Process Interface ATM Address Change
*
* This function is called whenever the ATM address for a physical
* interface is set/changed.
*
* Called at splnet.
*
* Arguments:
* sip pointer to interface's UNI signalling instance
*
* Returns:
* none
*
*/
void
uniarp_ifaddr(sip)
struct siginst *sip;
{
struct atm_nif *nip;
struct uniip *uip;
ATM_DEBUG1("uniarp_ifaddr: sip=%p\n", sip);
/*
* We've got to handle this for every network interface
*/
for (nip = sip->si_pif->pif_nif; nip; nip = nip->nif_pnext) {
/*
* Find our control blocks
*/
for (uip = uniip_head; uip; uip = uip->uip_next) {
if (uip->uip_ipnif->inf_nif == nip)
break;
}
if (uip == NULL)
continue;
/*
* We don't support changing prefix (yet)
*/
if (uip->uip_flags & UIF_IFADDR) {
log(LOG_ERR, "uniarp_ifaddr: change not supported\n");
continue;
}
/*
* Note that address has been set and figure out what
* to do next
*/
uip->uip_flags |= UIF_IFADDR;
if (uip->uip_arpstate == UIAS_CLIENT_PADDR) {
/*
* This is what we're waiting for
*/
uniarp_client_mode(uip, NULL);
}
}
return;
}
/*
* Set ATMARP Server Mode
*
* This function is called to configure the local node to become the
* ATMARP server for the specified LIS.
*
* Called at splnet.
*
* Arguments:
* uip pointer to UNI IP interface
*
* Returns:
* none
*
*/
static void
uniarp_server_mode(uip)
struct uniip *uip;
{
struct ip_nif *inp;
struct atm_nif *nip;
struct siginst *sgp;
struct ipvcc *ivp, *inext;
struct uniarp *uap, *unext;
int i;
ATM_DEBUG1("uniarp_server_mode: uip=%p\n", uip);
/*
* Handle client/server mode changes first
*/
switch (uip->uip_arpstate) {
case UIAS_NOTCONF:
case UIAS_SERVER_ACTIVE:
case UIAS_CLIENT_PADDR:
/*
* Nothing to undo
*/
break;
case UIAS_CLIENT_POPEN:
/*
* We're becoming the server, so kill the pending connection
*/
UNIIP_ARP_CANCEL(uip);
if (ivp = uip->uip_arpsvrvcc) {
ivp->iv_flags &= ~IVF_NOIDLE;
uip->uip_arpsvrvcc = NULL;
(*ivp->iv_ipnif->inf_arpnotify)(ivp, MAP_FAILED);
}
break;
case UIAS_CLIENT_REGISTER:
case UIAS_CLIENT_ACTIVE:
/*
* We're becoming the server, but leave existing VCC as a
* "normal" IP VCC
*/
UNIIP_ARP_CANCEL(uip);
ivp = uip->uip_arpsvrvcc;
ivp->iv_flags &= ~IVF_NOIDLE;
uip->uip_arpsvrvcc = NULL;
break;
}
/*
* Revalidate status for all arp entries on this interface
*/
for (i = 0; i < UNIARP_HASHSIZ; i++) {
for (uap = uniarp_arptab[i]; uap; uap = unext) {
unext = uap->ua_next;
if (uap->ua_intf != uip)
continue;
if (uap->ua_origin >= UAO_PERM)
continue;
if (uap->ua_origin >= UAO_SCSP) {
if (uniarp_validate_ip(uip, &uap->ua_dstip,
uap->ua_origin) == 0)
continue;
}
if (uap->ua_ivp == NULL) {
UNIARP_CANCEL(uap);
UNIARP_DELETE(uap);
atm_free((caddr_t)uap);
continue;
}
if (uap->ua_flags & UAF_VALID) {
uap->ua_flags |= UAF_LOCKED;
for (ivp = uap->ua_ivp; ivp; ivp = inext) {
inext = ivp->iv_arpnext;
(*ivp->iv_ipnif->inf_arpnotify)
(ivp, MAP_INVALID);
}
uap->ua_flags &= ~(UAF_LOCKED | UAF_VALID);
}
uap->ua_aging = 1;
uap->ua_origin = 0;
}
}
/*
* OK, now let's make ourselves the server
*/
inp = uip->uip_ipnif;
nip = inp->inf_nif;
sgp = nip->nif_pif->pif_siginst;
ATM_ADDR_SEL_COPY(&sgp->si_addr, nip->nif_sel, &uip->uip_arpsvratm);
uip->uip_arpsvrip = IA_SIN(inp->inf_addr)->sin_addr;
uip->uip_arpstate = UIAS_SERVER_ACTIVE;
return;
}
/*
* Set ATMARP Client Mode
*
* This function is called to configure the local node to be an ATMARP
* client on the specified LIS using the specified ATMARP server.
*
* Called at splnet.
*
* Arguments:
* uip pointer to UNI IP interface
* aap pointer to the ATMARP server's ATM address
*
* Returns:
* none
*
*/
static void
uniarp_client_mode(uip, aap)
struct uniip *uip;
Atm_addr *aap;
{
struct ip_nif *inp = uip->uip_ipnif;
struct uniarp *uap, *unext;
struct ipvcc *ivp, *inext;
int i;
ATM_DEBUG2("uniarp_client_mode: uip=%p, atm=(%s,-)\n",
uip, aap ? unisig_addr_print(aap): "-");
/*
* Handle client/server mode changes first
*/
switch (uip->uip_arpstate) {
case UIAS_NOTCONF:
case UIAS_CLIENT_PADDR:
/*
* Nothing to undo
*/
break;
case UIAS_CLIENT_POPEN:
/*
* If this is this a timeout retry, just go do it
*/
if (aap == NULL)
break;
/*
* If this isn't really a different arpserver, we're done
*/
if (ATM_ADDR_EQUAL(aap, &uip->uip_arpsvratm))
return;
/*
* We're changing servers, so kill the pending connection
*/
UNIIP_ARP_CANCEL(uip);
if (ivp = uip->uip_arpsvrvcc) {
ivp->iv_flags &= ~IVF_NOIDLE;
uip->uip_arpsvrvcc = NULL;
(*ivp->iv_ipnif->inf_arpnotify)(ivp, MAP_FAILED);
}
break;
case UIAS_CLIENT_REGISTER:
case UIAS_CLIENT_ACTIVE:
/*
* If this isn't really a different arpserver, we're done
*/
if (ATM_ADDR_EQUAL(aap, &uip->uip_arpsvratm))
return;
/*
* We're changing servers, but leave existing VCC as a
* "normal" IP VCC
*/
UNIIP_ARP_CANCEL(uip);
ivp = uip->uip_arpsvrvcc;
ivp->iv_flags &= ~IVF_NOIDLE;
uip->uip_arpsvrvcc = NULL;
break;
case UIAS_SERVER_ACTIVE:
/*
* We're changing from server mode, so...
*
* Reset valid/authoritative status for all arp entries
* on this interface
*/
for (i = 0; i < UNIARP_HASHSIZ; i++) {
for (uap = uniarp_arptab[i]; uap; uap = unext) {
unext = uap->ua_next;
if (uap->ua_intf != uip)
continue;
if (uap->ua_origin >= UAO_PERM)
continue;
if (uap->ua_ivp == NULL) {
UNIARP_CANCEL(uap);
UNIARP_DELETE(uap);
atm_free((caddr_t)uap);
continue;
}
if (uap->ua_flags & UAF_VALID) {
uap->ua_flags |= UAF_LOCKED;
for (ivp = uap->ua_ivp; ivp;
ivp = inext) {
inext = ivp->iv_arpnext;
(*ivp->iv_ipnif->inf_arpnotify)
(ivp, MAP_INVALID);
}
uap->ua_flags &=
~(UAF_LOCKED | UAF_VALID);
}
uap->ua_aging = 1;
uap->ua_origin = 0;
}
}
uip->uip_arpsvratm.address_format = T_ATM_ABSENT;
uip->uip_arpsvratm.address_length = 0;
uip->uip_arpsvrsub.address_format = T_ATM_ABSENT;
uip->uip_arpsvrsub.address_length = 0;
uip->uip_arpsvrip.s_addr = 0;
break;
}
/*
* Save the arp server address, if supplied now
*/
if (aap)
ATM_ADDR_COPY(aap, &uip->uip_arpsvratm);
/*
* If the interface's ATM address isn't set yet, then we
* can't do much until it is
*/
if ((uip->uip_flags & UIF_IFADDR) == 0) {
uip->uip_arpstate = UIAS_CLIENT_PADDR;
return;
}
/*
* Just to keep things simple, if we already have (or are trying to
* setup) any SVCs to our new server, kill the connections so we can
* open a "fresh" SVC for the arpserver connection.
*/
for (i = 0; i < UNIARP_HASHSIZ; i++) {
for (uap = uniarp_arptab[i]; uap; uap = unext) {
unext = uap->ua_next;
if (ATM_ADDR_EQUAL(&uip->uip_arpsvratm,
&uap->ua_dstatm) &&
ATM_ADDR_EQUAL(&uip->uip_arpsvrsub,
&uap->ua_dstatmsub)) {
uap->ua_flags &= ~UAF_VALID;
for (ivp = uap->ua_ivp; ivp; ivp = inext) {
inext = ivp->iv_arpnext;
(*inp->inf_arpnotify)(ivp, MAP_FAILED);
}
}
}
}
for (uap = uniarp_nomaptab; uap; uap = unext) {
unext = uap->ua_next;
if (ATM_ADDR_EQUAL(&uip->uip_arpsvratm, &uap->ua_dstatm) &&
ATM_ADDR_EQUAL(&uip->uip_arpsvrsub, &uap->ua_dstatmsub)) {
uap->ua_flags &= ~UAF_VALID;
for (ivp = uap->ua_ivp; ivp; ivp = inext) {
inext = ivp->iv_arpnext;
(*inp->inf_arpnotify)(ivp, MAP_FAILED);
}
}
}
/*
* Now, get an arp entry for the server connection
*/
uip->uip_arpstate = UIAS_CLIENT_POPEN;
uap = (struct uniarp *)atm_allocate(&uniarp_pool);
if (uap == NULL) {
UNIIP_ARP_TIMER(uip, 1 * ATM_HZ);
return;
}
/*
* Next, initiate an SVC to the server
*/
if ((*inp->inf_createsvc)(&inp->inf_nif->nif_if, AF_ATM,
(caddr_t)&uip->uip_arpsvratm, &ivp)) {
atm_free((caddr_t)uap);
UNIIP_ARP_TIMER(uip, 1 * ATM_HZ);
return;
}
/*
* Finally, get everything set up and wait for the SVC
* connection to complete
*/
uip->uip_arpsvrvcc = ivp;
ivp->iv_flags |= IVF_NOIDLE;
ATM_ADDR_COPY(&uip->uip_arpsvratm, &uap->ua_dstatm);
ATM_ADDR_COPY(&uip->uip_arpsvrsub, &uap->ua_dstatmsub);
uap->ua_intf = uip;
LINK2TAIL(ivp, struct ipvcc, uap->ua_ivp, iv_arpnext);
ivp->iv_arpent = (struct arpmap *)uap;
LINK2TAIL(uap, struct uniarp, uniarp_nomaptab, ua_next);
return;
}
/*
* Process a UNI ARP interface timeout
*
* Called when a previously scheduled uniip arp interface timer expires.
* Processing will be based on the current uniip arp state.
*
* Called at splnet.
*
* Arguments:
* tip pointer to uniip arp timer control block
*
* Returns:
* none
*
*/
void
uniarp_iftimeout(tip)
struct atm_time *tip;
{
struct ip_nif *inp;
struct uniip *uip;
/*
* Back-off to uniip control block
*/
uip = (struct uniip *)
((caddr_t)tip - (int)(&((struct uniip *)0)->uip_arptime));
ATM_DEBUG2("uniarp_iftimeout: uip=%p, state=%d\n", uip,
uip->uip_arpstate);
/*
* Process timeout based on protocol state
*/
switch (uip->uip_arpstate) {
case UIAS_CLIENT_POPEN:
/*
* Retry opening arp server connection
*/
uniarp_client_mode(uip, NULL);
break;
case UIAS_CLIENT_REGISTER:
/*
* Resend registration request
*/
inp = uip->uip_ipnif;
(void) uniarp_arp_req(uip, &(IA_SIN(inp->inf_addr)->sin_addr));
/*
* Restart timer
*/
UNIIP_ARP_TIMER(uip, 2 * ATM_HZ);
break;
case UIAS_CLIENT_ACTIVE:
/*
* Refresh our registration
*/
inp = uip->uip_ipnif;
(void) uniarp_arp_req(uip, &(IA_SIN(inp->inf_addr)->sin_addr));
/*
* Restart timer
*/
UNIIP_ARP_TIMER(uip, UNIARP_REGIS_RETRY);
break;
default:
log(LOG_ERR, "uniarp_iftimeout: invalid state %d\n",
uip->uip_arpstate);
}
}
/*
* UNI ARP IOCTL support
*
* Function will be called at splnet.
*
* Arguments:
* code PF_ATM sub-operation code
* data pointer to code specific parameter data area
* arg1 pointer to code specific argument
*
* Returns:
* 0 request procesed
* errno error processing request - reason indicated
*
*/
int
uniarp_ioctl(code, data, arg1)
int code;
caddr_t data;
caddr_t arg1;
{
struct atmaddreq *aap;
struct atmdelreq *adp;
struct atmsetreq *asp;
struct atminfreq *aip;
struct air_arp_rsp aar;
struct air_asrv_rsp asr;
struct atm_pif *pip;
struct atm_nif *nip;
struct ipvcc *ivp, *inext;
struct uniip *uip;
struct uniarp *uap;
struct unisig *usp;
struct in_addr ip;
Atm_addr atmsub;
u_long dst;
int err = 0, i, buf_len;
caddr_t buf_addr;
switch (code) {
case AIOCS_ADD_ARP:
/*
* Add a permanent ARP mapping
*/
aap = (struct atmaddreq *)data;
uip = (struct uniip *)arg1;
if (aap->aar_arp_addr.address_format != T_ATM_ENDSYS_ADDR) {
err = EINVAL;
break;
}
atmsub.address_format = T_ATM_ABSENT;
atmsub.address_length = 0;
ip = SATOSIN(&aap->aar_arp_dst)->sin_addr;
/*
* Validate IP address
*/
if (uniarp_validate_ip(uip, &ip, aap->aar_arp_origin) != 0) {
err = EADDRNOTAVAIL;
break;
}
/*
* Add an entry to the cache
*/
err = uniarp_cache_svc(uip, &ip, &aap->aar_arp_addr,
&atmsub, aap->aar_arp_origin);
break;
case AIOCS_DEL_ARP:
/*
* Delete an ARP mapping
*/
adp = (struct atmdelreq *)data;
uip = (struct uniip *)arg1;
ip = SATOSIN(&adp->adr_arp_dst)->sin_addr;
/*
* Now find the entry to be deleted
*/
UNIARP_LOOKUP(ip.s_addr, uap);
if (uap == NULL) {
err = ENOENT;
break;
}
/*
* Notify all VCCs using this entry that they must finish
* up now.
*/
uap->ua_flags |= UAF_LOCKED;
for (ivp = uap->ua_ivp; ivp; ivp = inext) {
inext = ivp->iv_arpnext;
(*ivp->iv_ipnif->inf_arpnotify)(ivp, MAP_FAILED);
}
/*
* Now free up the entry
*/
UNIARP_CANCEL(uap);
UNIARP_DELETE(uap);
atm_free((caddr_t)uap);
break;
case AIOCS_SET_ASV:
/*
* Set interface ARP server address
*/
asp = (struct atmsetreq *)data;
for (uip = uniip_head; uip; uip = uip->uip_next) {
if (uip->uip_ipnif->inf_nif == (struct atm_nif *)arg1)
break;
}
if (uip == NULL) {
err = ENOPROTOOPT;
break;
}
/*
* Check for our own address
*/
usp = (struct unisig *)
uip->uip_ipnif->inf_nif->nif_pif->pif_siginst;
if (ATM_ADDR_EQUAL(&asp->asr_arp_addr, &usp->us_addr)) {
asp->asr_arp_addr.address_format = T_ATM_ABSENT;
}
/*
* If we're going into server mode, make sure we can get
* the memory for the prefix list before continuing
*/
if (asp->asr_arp_addr.address_format == T_ATM_ABSENT) {
i = asp->asr_arp_plen / sizeof(struct uniarp_prf);
if (i <= 0) {
err = EINVAL;
break;
}
buf_len = i * sizeof(struct uniarp_prf);
buf_addr = KM_ALLOC(buf_len, M_DEVBUF, M_NOWAIT);
if (buf_addr == NULL) {
err = ENOMEM;
break;
}
err = copyin(asp->asr_arp_pbuf, buf_addr, buf_len);
if (err) {
KM_FREE(buf_addr, buf_len, M_DEVBUF);
break;
}
} else {
/* Silence the compiler */
i = 0;
buf_addr = NULL;
}
/*
* Free any existing prefix address list
*/
if (uip->uip_prefix != NULL) {
KM_FREE(uip->uip_prefix,
uip->uip_nprefix * sizeof(struct uniarp_prf),
M_DEVBUF);
uip->uip_prefix = NULL;
uip->uip_nprefix = 0;
}
if (asp->asr_arp_addr.address_format == T_ATM_ABSENT) {
/*
* Set ATMARP server mode
*/
uip->uip_prefix = (struct uniarp_prf *)buf_addr;
uip->uip_nprefix = i;
uniarp_server_mode(uip);
} else
/*
* Set ATMARP client mode
*/
uniarp_client_mode(uip, &asp->asr_arp_addr);
break;
case AIOCS_INF_ARP:
/*
* Get ARP table information
*/
aip = (struct atminfreq *)data;
if (aip->air_arp_addr.sa_family != AF_INET)
break;
dst = SATOSIN(&aip->air_arp_addr)->sin_addr.s_addr;
buf_addr = aip->air_buf_addr;
buf_len = aip->air_buf_len;
pip = ((struct siginst *)arg1)->si_pif;
/*
* Run through entire arp table
*/
for (i = 0; i < UNIARP_HASHSIZ; i++) {
for (uap = uniarp_arptab[i]; uap; uap = uap->ua_next) {
/*
* We only want valid entries learned
* from the supplied interface.
*/
nip = uap->ua_intf->uip_ipnif->inf_nif;
if (nip->nif_pif != pip)
continue;
if ((dst != INADDR_ANY) &&
(dst != uap->ua_dstip.s_addr))
continue;
/*
* Make sure there's room in the user's buffer
*/
if (buf_len < sizeof(aar)) {
err = ENOSPC;
break;
}
/*
* Fill in info to be returned
*/
SATOSIN(&aar.aap_arp_addr)->sin_family =
AF_INET;
SATOSIN(&aar.aap_arp_addr)->sin_addr.s_addr =
uap->ua_dstip.s_addr;
(void) snprintf(aar.aap_intf,
sizeof(aar.aap_intf), "%s%d",
nip->nif_if.if_name,
nip->nif_if.if_unit);
aar.aap_flags = uap->ua_flags;
aar.aap_origin = uap->ua_origin;
if (uap->ua_flags & UAF_VALID)
aar.aap_age = uap->ua_aging +
uap->ua_retry * UNIARP_RETRY_AGE;
else
aar.aap_age = 0;
ATM_ADDR_COPY(&uap->ua_dstatm, &aar.aap_addr);
ATM_ADDR_COPY(&uap->ua_dstatmsub,
&aar.aap_subaddr);
/*
* Copy the response into the user's buffer
*/
if (err = copyout((caddr_t)&aar, buf_addr,
sizeof(aar)))
break;
buf_addr += sizeof(aar);
buf_len -= sizeof(aar);
}
if (err)
break;
}
/*
* Now go through the 'nomap' table
*/
if (err || (dst != INADDR_ANY))
goto updbuf;
for (uap = uniarp_nomaptab; uap; uap = uap->ua_next) {
/*
* We only want valid entries learned
* from the supplied interface.
*/
nip = uap->ua_intf->uip_ipnif->inf_nif;
if (nip->nif_pif != pip)
continue;
/*
* Make sure there's room in the user's buffer
*/
if (buf_len < sizeof(aar)) {
err = ENOSPC;
break;
}
/*
* Fill in info to be returned
*/
SATOSIN(&aar.aap_arp_addr)->sin_family = AF_INET;
SATOSIN(&aar.aap_arp_addr)->sin_addr.s_addr = 0;
(void) snprintf(aar.aap_intf,
sizeof(aar.aap_intf), "%s%d",
nip->nif_if.if_name, nip->nif_if.if_unit);
aar.aap_flags = 0;
aar.aap_origin = uap->ua_origin;
aar.aap_age = 0;
ATM_ADDR_COPY(&uap->ua_dstatm, &aar.aap_addr);
ATM_ADDR_COPY(&uap->ua_dstatmsub,
&aar.aap_subaddr);
/*
* Copy the response into the user's buffer
*/
if (err = copyout((caddr_t)&aar, buf_addr,
sizeof(aar)))
break;
buf_addr += sizeof(aar);
buf_len -= sizeof(aar);
}
updbuf:
/*
* Update the buffer pointer and length
*/
aip->air_buf_addr = buf_addr;
aip->air_buf_len = buf_len;
/*
* If the user wants the refresh status reset and no
* errors have been encountered, then do the reset
*/
if ((err == 0) && (aip->air_arp_flags & ARP_RESET_REF)) {
for (i = 0; i < UNIARP_HASHSIZ; i++) {
for (uap = uniarp_arptab[i]; uap;
uap = uap->ua_next) {
/*
* We only want valid entries learned
* from the supplied interface.
*/
nip = uap->ua_intf->uip_ipnif->inf_nif;
if (nip->nif_pif != pip)
continue;
if ((dst != INADDR_ANY) &&
(dst != uap->ua_dstip.s_addr))
continue;
/*
* Reset refresh flag
*/
uap->ua_flags &= ~UAF_REFRESH;
}
}
}
break;
case AIOCS_INF_ASV:
/*
* Get ARP server information
*/
aip = (struct atminfreq *)data;
buf_addr = aip->air_buf_addr;
buf_len = aip->air_buf_len;
for (uip = uniip_head; uip; uip = uip->uip_next) {
if ((arg1 != NULL) &&
(uip->uip_ipnif->inf_nif != (struct atm_nif *)arg1))
continue;
/*
* Make sure there's room in the user's buffer
*/
if (buf_len < sizeof(asr)) {
err = ENOSPC;
break;
}
/*
* Fill in info to be returned
*/
nip = uip->uip_ipnif->inf_nif;
(void) snprintf(asr.asp_intf,
sizeof(asr.asp_intf), "%s%d",
nip->nif_if.if_name, nip->nif_if.if_unit);
asr.asp_state = uip->uip_arpstate;
if (uip->uip_arpstate == UIAS_SERVER_ACTIVE) {
asr.asp_addr.address_format = T_ATM_ABSENT;
asr.asp_addr.address_length = 0;
} else {
ATM_ADDR_COPY(&uip->uip_arpsvratm,
&asr.asp_addr);
}
asr.asp_subaddr.address_format = T_ATM_ABSENT;
asr.asp_subaddr.address_length = 0;
asr.asp_nprefix = uip->uip_nprefix;
/*
* Copy the response into the user's buffer
*/
if (err = copyout((caddr_t)&asr, buf_addr, sizeof(asr)))
break;
buf_addr += sizeof(asr);
buf_len -= sizeof(asr);
/*
* Copy the prefix list into the user's buffer
*/
if (uip->uip_nprefix) {
i = uip->uip_nprefix
* sizeof(struct uniarp_prf);
if (buf_len < i) {
err = ENOSPC;
break;
}
if (err = copyout(uip->uip_prefix, buf_addr, i))
break;
buf_addr += i;
buf_len -= i;
}
}
/*
* Update the buffer pointer and length
*/
aip->air_buf_addr = buf_addr;
aip->air_buf_len = buf_len;
break;
default:
err = EOPNOTSUPP;
}
return (err);
}
/*
* Get Connection's Application/Owner Name
*
* Arguments:
* tok uniarp connection token (pointer to ipvcc)
*
* Returns:
* addr pointer to string containing our name
*
*/
caddr_t
uniarp_getname(tok)
void *tok;
{
return ("ATMARP");
}
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