1820df7a2d
Host ATM Research Platform (HARP), Network Computing Services, Inc. This software was developed with the support of the Defense Advanced Research Projects Agency (DARPA).
421 lines
10 KiB
C
421 lines
10 KiB
C
/*
|
|
*
|
|
* ===================================
|
|
* 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_cache.c,v 1.8 1998/08/26 23:29:20 mks Exp $
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* ATM Forum UNI Support
|
|
* ---------------------
|
|
*
|
|
* UNI ATMARP support (RFC1577) - ARP cache processing
|
|
*
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char *RCSid = "@(#) $Id: uniarp_cache.c,v 1.8 1998/08/26 23:29:20 mks Exp $";
|
|
#endif
|
|
|
|
#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>
|
|
|
|
|
|
/*
|
|
* Add data to the arp table cache
|
|
*
|
|
* Called at splnet.
|
|
*
|
|
* Arguments:
|
|
* uip pointer to UNI IP interface
|
|
* ip pointer to IP address structure
|
|
* atm pointer to ATM address structure
|
|
* atmsub pointer to ATM subaddress structure
|
|
* origin source of arp information
|
|
*
|
|
* Returns:
|
|
* 0 cache successfully updated
|
|
* else updated failed - reason indicated
|
|
*
|
|
*/
|
|
int
|
|
uniarp_cache_svc(uip, ip, atm, atmsub, origin)
|
|
struct uniip *uip;
|
|
struct in_addr *ip;
|
|
Atm_addr *atm;
|
|
Atm_addr *atmsub;
|
|
u_int origin;
|
|
{
|
|
struct ip_nif *inp;
|
|
struct ipvcc *ivp, *inext, *itail;
|
|
struct uniarp *nouap, *ipuap;
|
|
char abuf[64];
|
|
|
|
#ifdef DIAGNOSTIC
|
|
strncpy(abuf, unisig_addr_print(atmsub), sizeof(abuf));
|
|
ATM_DEBUG4("cache_svc: ip=%s, atm=(%s,%s), origin=%d\n",
|
|
inet_ntoa(*ip), unisig_addr_print(atm), abuf, origin);
|
|
#endif
|
|
|
|
/*
|
|
* Get interface info
|
|
*/
|
|
inp = uip->uip_ipnif;
|
|
|
|
/*
|
|
* Find both cached entry and 'nomap' entries for this data.
|
|
*/
|
|
UNIARP_LOOKUP(ip->s_addr, ipuap);
|
|
for (nouap = uniarp_nomaptab; nouap; nouap = nouap->ua_next) {
|
|
if (ATM_ADDR_EQUAL(atm, &nouap->ua_dstatm) &&
|
|
ATM_ADDR_EQUAL(atmsub, &nouap->ua_dstatmsub) &&
|
|
(nouap->ua_intf == uip))
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If there aren't any entries yet, create one
|
|
*/
|
|
if ((ipuap == NULL) && (nouap == NULL)) {
|
|
ipuap = (struct uniarp *)atm_allocate(&uniarp_pool);
|
|
if (ipuap == NULL)
|
|
return (ENOMEM);
|
|
ipuap->ua_dstip.s_addr = ip->s_addr;
|
|
ipuap->ua_dstatm.address_format = T_ATM_ABSENT;
|
|
ipuap->ua_dstatmsub.address_format = T_ATM_ABSENT;
|
|
ipuap->ua_intf = uip;
|
|
UNIARP_ADD(ipuap);
|
|
}
|
|
|
|
/*
|
|
* If there's no cached mapping, then make the 'nomap' entry
|
|
* the new cached entry.
|
|
*/
|
|
if (ipuap == NULL) {
|
|
UNLINK(nouap, struct uniarp, uniarp_nomaptab, ua_next);
|
|
nouap->ua_dstip.s_addr = ip->s_addr;
|
|
ipuap = nouap;
|
|
nouap = NULL;
|
|
UNIARP_ADD(ipuap);
|
|
}
|
|
|
|
/*
|
|
* We need to check the consistency of the new data with any
|
|
* cached data. So taking the easy case first, if there isn't
|
|
* an ATM address in the cache then we can skip all these checks.
|
|
*/
|
|
if (ipuap->ua_dstatm.address_format != T_ATM_ABSENT) {
|
|
/*
|
|
* See if the new data conflicts with what's in the cache
|
|
*/
|
|
if (ATM_ADDR_EQUAL(atm, &ipuap->ua_dstatm) &&
|
|
ATM_ADDR_EQUAL(atmsub, &ipuap->ua_dstatmsub) &&
|
|
(uip == ipuap->ua_intf)) {
|
|
/*
|
|
* No conflicts here
|
|
*/
|
|
goto dataok;
|
|
}
|
|
|
|
/*
|
|
* Data conflict...how we deal with this depends on
|
|
* the origins of the conflicting data
|
|
*/
|
|
if (origin == ipuap->ua_origin) {
|
|
/*
|
|
* The new data has equal precedence - if there are
|
|
* any VCCs using this entry, then we reject this
|
|
* "duplicate IP address" update.
|
|
*/
|
|
if (ipuap->ua_ivp != NULL) {
|
|
strncpy(abuf, unisig_addr_print(atmsub),
|
|
sizeof(abuf));
|
|
log(LOG_WARNING,
|
|
"uniarp: duplicate IP address %s from %s,%s\n",
|
|
inet_ntoa(*ip), unisig_addr_print(atm),
|
|
abuf);
|
|
return (EACCES);
|
|
}
|
|
|
|
} else if (origin > ipuap->ua_origin) {
|
|
/*
|
|
* New data's origin has higher precedence,
|
|
* so accept the new mapping and notify IP/ATM
|
|
* that a mapping change has occurred. IP/ATM will
|
|
* close any VCC's which aren't waiting for this map.
|
|
*/
|
|
ipuap->ua_flags |= UAF_LOCKED;
|
|
for (ivp = ipuap->ua_ivp; ivp; ivp = inext) {
|
|
inext = ivp->iv_arpnext;
|
|
(*inp->inf_arpnotify)(ivp, MAP_CHANGED);
|
|
}
|
|
ipuap->ua_flags &= ~UAF_LOCKED;
|
|
} else {
|
|
/*
|
|
* New data is of lesser origin precedence,
|
|
* so we just reject the update attempt.
|
|
*/
|
|
return (EACCES);
|
|
}
|
|
|
|
strncpy(abuf, unisig_addr_print(atmsub), sizeof(abuf));
|
|
log(LOG_WARNING,
|
|
"uniarp: ATM address for %s changed to %s,%s\n",
|
|
inet_ntoa(*ip), unisig_addr_print(atm), abuf);
|
|
}
|
|
|
|
/*
|
|
* Update the cache entry with the new data
|
|
*/
|
|
ATM_ADDR_COPY(atm, &ipuap->ua_dstatm);
|
|
ATM_ADDR_COPY(atmsub, &ipuap->ua_dstatmsub);
|
|
ipuap->ua_intf = uip;
|
|
|
|
dataok:
|
|
/*
|
|
* Update cache data origin
|
|
*/
|
|
ipuap->ua_origin = MAX(ipuap->ua_origin, origin);
|
|
|
|
/*
|
|
* Ok, now act on this new/updated cache data
|
|
*/
|
|
ipuap->ua_flags |= UAF_LOCKED;
|
|
|
|
/*
|
|
* Save pointer to last VCC currently on cached entry chain that
|
|
* will need to be notified of the map becoming valid
|
|
*/
|
|
itail = NULL;
|
|
if ((ipuap->ua_flags & UAF_VALID) == 0) {
|
|
|
|
for (itail = ipuap->ua_ivp; itail && itail->iv_arpnext;
|
|
itail = itail->iv_arpnext) {
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If there was a 'nomap' entry for this mapping, then we need to
|
|
* announce the new mapping to them first.
|
|
*/
|
|
if (nouap) {
|
|
|
|
/*
|
|
* Move the VCCs from this entry to the cache entry and
|
|
* let them know there's a valid mapping now
|
|
*/
|
|
for (ivp = nouap->ua_ivp; ivp; ivp = inext) {
|
|
inext = ivp->iv_arpnext;
|
|
|
|
UNLINK(ivp, struct ipvcc, nouap->ua_ivp, iv_arpnext);
|
|
|
|
LINK2TAIL(ivp, struct ipvcc, ipuap->ua_ivp, iv_arpnext);
|
|
ivp->iv_arpent = (struct arpmap *)ipuap;
|
|
|
|
(*inp->inf_arpnotify)(ivp, MAP_VALID);
|
|
}
|
|
|
|
/*
|
|
* Unlink and free the 'nomap' entry
|
|
*/
|
|
UNLINK(nouap, struct uniarp, uniarp_nomaptab, ua_next);
|
|
UNIARP_CANCEL(nouap);
|
|
atm_free((caddr_t)nouap);
|
|
}
|
|
|
|
/*
|
|
* Now, if this entry wasn't valid, notify the remaining VCCs
|
|
*/
|
|
if (itail) {
|
|
|
|
for (ivp = ipuap->ua_ivp; ivp; ivp = inext) {
|
|
inext = ivp->iv_arpnext;
|
|
(*inp->inf_arpnotify)(ivp, MAP_VALID);
|
|
if (ivp == itail)
|
|
break;
|
|
}
|
|
}
|
|
ipuap->ua_flags &= ~UAF_LOCKED;
|
|
|
|
/*
|
|
* We now have a valid cache entry, so cancel any retry timer
|
|
* and reset the aging timeout
|
|
*/
|
|
UNIARP_CANCEL(ipuap);
|
|
if ((ipuap->ua_origin == UAO_REGISTER) && (origin != UAO_REGISTER)) {
|
|
if (((ipuap->ua_flags & UAF_VALID) == 0) ||
|
|
(ipuap->ua_aging <=
|
|
UNIARP_SERVER_AGE - UNIARP_MIN_REFRESH)) {
|
|
ipuap->ua_flags |= UAF_REFRESH;
|
|
ipuap->ua_aging = UNIARP_SERVER_AGE;
|
|
ipuap->ua_retry = UNIARP_SERVER_RETRY;
|
|
}
|
|
} else {
|
|
if (uip->uip_arpstate == UIAS_SERVER_ACTIVE) {
|
|
ipuap->ua_aging = UNIARP_SERVER_AGE;
|
|
ipuap->ua_retry = UNIARP_SERVER_RETRY;
|
|
} else {
|
|
ipuap->ua_aging = UNIARP_CLIENT_AGE;
|
|
ipuap->ua_retry = UNIARP_CLIENT_RETRY;
|
|
}
|
|
ipuap->ua_flags |= UAF_REFRESH;
|
|
}
|
|
ipuap->ua_flags |= UAF_VALID;
|
|
ipuap->ua_flags &= ~UAF_USED;
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Process ARP data from a PVC
|
|
*
|
|
* The arp table cache is never updated with PVC information.
|
|
*
|
|
* Called at splnet.
|
|
*
|
|
* Arguments:
|
|
* ivp pointer to input PVC's IPVCC control block
|
|
* ip pointer to IP address structure
|
|
* atm pointer to ATM address structure
|
|
* atmsub pointer to ATM subaddress structure
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
void
|
|
uniarp_cache_pvc(ivp, ip, atm, atmsub)
|
|
struct ipvcc *ivp;
|
|
struct in_addr *ip;
|
|
Atm_addr *atm;
|
|
Atm_addr *atmsub;
|
|
{
|
|
struct ip_nif *inp;
|
|
struct uniarp *uap;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
char buf[64];
|
|
int vpi = 0, vci = 0;
|
|
|
|
if ((ivp->iv_conn) && (ivp->iv_conn->co_connvc)) {
|
|
vpi = ivp->iv_conn->co_connvc->cvc_vcc->vc_vpi;
|
|
vci = ivp->iv_conn->co_connvc->cvc_vcc->vc_vci;
|
|
}
|
|
strncpy(buf, unisig_addr_print(atmsub), sizeof(buf));
|
|
ATM_DEBUG5("cache_pvc: vcc=(%d,%d), ip=%s, atm=(%s,%s)\n",
|
|
vpi, vci, inet_ntoa(*ip), unisig_addr_print(atm), buf);
|
|
#endif
|
|
|
|
/*
|
|
* Get PVC info
|
|
*/
|
|
inp = ivp->iv_ipnif;
|
|
uap = (struct uniarp *)ivp->iv_arpent;
|
|
|
|
/*
|
|
* See if IP address for PVC has changed
|
|
*/
|
|
if (uap->ua_dstip.s_addr != ip->s_addr) {
|
|
if (uap->ua_dstip.s_addr != 0)
|
|
(*inp->inf_arpnotify)(ivp, MAP_CHANGED);
|
|
uap->ua_dstip.s_addr = ip->s_addr;
|
|
}
|
|
|
|
/*
|
|
* Let IP/ATM know if address has become valid
|
|
*/
|
|
if ((uap->ua_flags & UAF_VALID) == 0)
|
|
(*inp->inf_arpnotify)(ivp, MAP_VALID);
|
|
uap->ua_flags |= UAF_VALID;
|
|
uap->ua_aging = UNIARP_CLIENT_AGE;
|
|
uap->ua_retry = UNIARP_CLIENT_RETRY;
|
|
|
|
/*
|
|
* Save ATM addresses just for debugging
|
|
*/
|
|
ATM_ADDR_COPY(atm, &uap->ua_dstatm);
|
|
ATM_ADDR_COPY(atmsub, &uap->ua_dstatmsub);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* Validate IP address
|
|
*
|
|
* Arguments:
|
|
* uip pointer to UNI IP interface
|
|
* ip pointer to IP address structure
|
|
* origin source of arp information
|
|
*
|
|
* Returns:
|
|
* 0 IP address is acceptable
|
|
* else invalid IP address
|
|
*
|
|
*/
|
|
int
|
|
uniarp_validate_ip(uip, ip, origin)
|
|
struct uniip *uip;
|
|
struct in_addr *ip;
|
|
u_int origin;
|
|
{
|
|
struct uniarp_prf *upp;
|
|
int i;
|
|
|
|
|
|
/*
|
|
* Can't be multicast or broadcast address
|
|
*/
|
|
if (IN_MULTICAST(ntohl(ip->s_addr)) ||
|
|
#if (defined(BSD) && (BSD >= 199306))
|
|
in_broadcast(*ip, &uip->uip_ipnif->inf_nif->nif_if))
|
|
#else
|
|
in_broadcast(*ip))
|
|
#endif
|
|
return (1);
|
|
|
|
/*
|
|
* For ATMARP registration information (including SCSP data),
|
|
* the address must be allowed by the interface's prefix list.
|
|
*/
|
|
if ((origin == UAO_REGISTER) || (origin == UAO_SCSP)) {
|
|
for (i = uip->uip_nprefix, upp = uip->uip_prefix;
|
|
i; i--, upp++) {
|
|
if ((ip->s_addr & upp->upf_mask.s_addr) ==
|
|
upp->upf_addr.s_addr)
|
|
break;
|
|
}
|
|
if (i == 0)
|
|
return (1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|