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code.illumos.org / illumos-gate / 45916cd2fec6e79bca5dee0421bd39e3c2910d1e / . / usr / src / uts / common / inet / ip / ip6_if.c
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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 1990 Mentat Inc.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* This file contains the interface control functions for IPv6.
*/
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <sys/stream.h>
#include <sys/dlpi.h>
#include <sys/stropts.h>
#include <sys/ddi.h>
#include <sys/cmn_err.h>
#include <sys/kstat.h>
#include <sys/debug.h>
#include <sys/zone.h>
#include <sys/systm.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/isa_defs.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/igmp_var.h>
#include <netinet/ip6.h>
#include <netinet/icmp6.h>
#include <netinet/in.h>
#include <inet/common.h>
#include <inet/nd.h>
#include <inet/mib2.h>
#include <inet/ip.h>
#include <inet/ip6.h>
#include <inet/ip_multi.h>
#include <inet/ip_ire.h>
#include <inet/ip_rts.h>
#include <inet/ip_ndp.h>
#include <inet/ip_if.h>
#include <inet/ip6_asp.h>
#include <inet/tun.h>
#include <inet/ipclassifier.h>
#include <inet/sctp_ip.h>
#include <sys/tsol/tndb.h>
#include <sys/tsol/tnet.h>
static in6_addr_t ipv6_ll_template =
{(uint32_t)V6_LINKLOCAL, 0x0, 0x0, 0x0};
static ipif_t *
ipif_lookup_interface_v6(const in6_addr_t *if_addr, const in6_addr_t *dst,
queue_t *q, mblk_t *mp, ipsq_func_t func, int *error);
/*
* ipif_lookup_group_v6
*/
ipif_t *
ipif_lookup_group_v6(const in6_addr_t *group, zoneid_t zoneid)
{
ire_t *ire;
ipif_t *ipif;
ire = ire_lookup_multi_v6(group, zoneid);
if (ire == NULL)
return (NULL);
ipif = ire->ire_ipif;
ipif_refhold(ipif);
ire_refrele(ire);
return (ipif);
}
/*
* ill_lookup_group_v6
*/
ill_t *
ill_lookup_group_v6(const in6_addr_t *group, zoneid_t zoneid)
{
ire_t *ire;
ill_t *ill;
ire = ire_lookup_multi_v6(group, zoneid);
if (ire == NULL)
return (NULL);
ill = ire->ire_ipif->ipif_ill;
ill_refhold(ill);
ire_refrele(ire);
return (ill);
}
/*
* Look for an ipif with the specified interface address and destination.
* The destination address is used only for matching point-to-point interfaces.
*/
static ipif_t *
ipif_lookup_interface_v6(const in6_addr_t *if_addr, const in6_addr_t *dst,
queue_t *q, mblk_t *mp, ipsq_func_t func, int *error)
{
ipif_t *ipif;
ill_t *ill;
ipsq_t *ipsq;
ill_walk_context_t ctx;
if (error != NULL)
*error = 0;
/*
* First match all the point-to-point interfaces
* before looking at non-point-to-point interfaces.
* This is done to avoid returning non-point-to-point
* ipif instead of unnumbered point-to-point ipif.
*/
rw_enter(&ill_g_lock, RW_READER);
ill = ILL_START_WALK_V6(&ctx);
for (; ill != NULL; ill = ill_next(&ctx, ill)) {
GRAB_CONN_LOCK(q);
mutex_enter(&ill->ill_lock);
for (ipif = ill->ill_ipif; ipif; ipif = ipif->ipif_next) {
/* Allow the ipif to be down */
if ((ipif->ipif_flags & IPIF_POINTOPOINT) &&
(IN6_ARE_ADDR_EQUAL(&ipif->ipif_v6lcl_addr,
if_addr)) &&
(IN6_ARE_ADDR_EQUAL(&ipif->ipif_v6pp_dst_addr,
dst))) {
if (IPIF_CAN_LOOKUP(ipif)) {
ipif_refhold_locked(ipif);
mutex_exit(&ill->ill_lock);
RELEASE_CONN_LOCK(q);
rw_exit(&ill_g_lock);
return (ipif);
} else if (IPIF_CAN_WAIT(ipif, q)) {
ipsq = ill->ill_phyint->phyint_ipsq;
mutex_enter(&ipsq->ipsq_lock);
mutex_exit(&ill->ill_lock);
rw_exit(&ill_g_lock);
ipsq_enq(ipsq, q, mp, func, NEW_OP,
ill);
mutex_exit(&ipsq->ipsq_lock);
RELEASE_CONN_LOCK(q);
*error = EINPROGRESS;
return (NULL);
}
}
}
mutex_exit(&ill->ill_lock);
RELEASE_CONN_LOCK(q);
}
rw_exit(&ill_g_lock);
/* lookup the ipif based on interface address */
ipif = ipif_lookup_addr_v6(if_addr, NULL, ALL_ZONES, q, mp, func,
error);
ASSERT(ipif == NULL || ipif->ipif_isv6);
return (ipif);
}
/*
* Look for an ipif with the specified address. For point-point links
* we look for matches on either the destination address and the local
* address, but we ignore the check on the local address if IPIF_UNNUMBERED
* is set.
* Matches on a specific ill if match_ill is set.
*/
/* ARGSUSED */
ipif_t *
ipif_lookup_addr_v6(const in6_addr_t *addr, ill_t *match_ill, zoneid_t zoneid,
queue_t *q, mblk_t *mp, ipsq_func_t func, int *error)
{
ipif_t *ipif;
ill_t *ill;
boolean_t ptp = B_FALSE;
ipsq_t *ipsq;
ill_walk_context_t ctx;
if (error != NULL)
*error = 0;
rw_enter(&ill_g_lock, RW_READER);
/*
* Repeat twice, first based on local addresses and
* next time for pointopoint.
*/
repeat:
ill = ILL_START_WALK_V6(&ctx);
for (; ill != NULL; ill = ill_next(&ctx, ill)) {
if (match_ill != NULL && ill != match_ill) {
continue;
}
GRAB_CONN_LOCK(q);
mutex_enter(&ill->ill_lock);
for (ipif = ill->ill_ipif; ipif; ipif = ipif->ipif_next) {
if (zoneid != ALL_ZONES &&
ipif->ipif_zoneid != zoneid &&
ipif->ipif_zoneid != ALL_ZONES)
continue;
/* Allow the ipif to be down */
if ((!ptp && (IN6_ARE_ADDR_EQUAL(
&ipif->ipif_v6lcl_addr, addr) &&
(ipif->ipif_flags & IPIF_UNNUMBERED) == 0)) ||
(ptp && (ipif->ipif_flags & IPIF_POINTOPOINT) &&
IN6_ARE_ADDR_EQUAL(&ipif->ipif_v6pp_dst_addr,
addr))) {
if (IPIF_CAN_LOOKUP(ipif)) {
ipif_refhold_locked(ipif);
mutex_exit(&ill->ill_lock);
RELEASE_CONN_LOCK(q);
rw_exit(&ill_g_lock);
return (ipif);
} else if (IPIF_CAN_WAIT(ipif, q)) {
ipsq = ill->ill_phyint->phyint_ipsq;
mutex_enter(&ipsq->ipsq_lock);
mutex_exit(&ill->ill_lock);
rw_exit(&ill_g_lock);
ipsq_enq(ipsq, q, mp, func, NEW_OP,
ill);
mutex_exit(&ipsq->ipsq_lock);
RELEASE_CONN_LOCK(q);
*error = EINPROGRESS;
return (NULL);
}
}
}
mutex_exit(&ill->ill_lock);
RELEASE_CONN_LOCK(q);
}
/* Repeat once more if needed */
if (ptp) {
rw_exit(&ill_g_lock);
if (error != NULL)
*error = ENXIO;
return (NULL);
}
ptp = B_TRUE;
goto repeat;
}
/*
* Perform various checks to verify that an address would make sense as a local
* interface address. This is currently only called when an attempt is made
* to set a local address.
*
* Does not allow a v4-mapped address, an address that equals the subnet
* anycast address, ... a multicast address, ...
*/
boolean_t
ip_local_addr_ok_v6(const in6_addr_t *addr, const in6_addr_t *subnet_mask)
{
in6_addr_t subnet;
if (IN6_IS_ADDR_UNSPECIFIED(addr))
return (B_TRUE); /* Allow all zeros */
/*
* Don't allow all zeroes or host part, but allow
* all ones netmask.
*/
V6_MASK_COPY(*addr, *subnet_mask, subnet);
if (IN6_IS_ADDR_V4MAPPED(addr) ||
(IN6_ARE_ADDR_EQUAL(addr, &subnet) &&
!IN6_ARE_ADDR_EQUAL(subnet_mask, &ipv6_all_ones)) ||
(IN6_IS_ADDR_V4COMPAT(addr) && CLASSD(V4_PART_OF_V6((*addr)))) ||
IN6_IS_ADDR_MULTICAST(addr))
return (B_FALSE);
return (B_TRUE);
}
/*
* Perform various checks to verify that an address would make sense as a
* remote/subnet interface address.
*/
boolean_t
ip_remote_addr_ok_v6(const in6_addr_t *addr, const in6_addr_t *subnet_mask)
{
in6_addr_t subnet;
if (IN6_IS_ADDR_UNSPECIFIED(addr))
return (B_TRUE); /* Allow all zeros */
V6_MASK_COPY(*addr, *subnet_mask, subnet);
if (IN6_IS_ADDR_V4MAPPED(addr) ||
(IN6_ARE_ADDR_EQUAL(addr, &subnet) &&
!IN6_ARE_ADDR_EQUAL(subnet_mask, &ipv6_all_ones)) ||
IN6_IS_ADDR_MULTICAST(addr) ||
(IN6_IS_ADDR_V4COMPAT(addr) && CLASSD(V4_PART_OF_V6((*addr)))))
return (B_FALSE);
return (B_TRUE);
}
/*
* ip_rt_add_v6 is called to add an IPv6 route to the forwarding table.
* ipif_arg is passed in to associate it with the correct interface
* (for link-local destinations and gateways).
*/
/* ARGSUSED1 */
int
ip_rt_add_v6(const in6_addr_t *dst_addr, const in6_addr_t *mask,
const in6_addr_t *gw_addr, const in6_addr_t *src_addr, int flags,
ipif_t *ipif_arg, ire_t **ire_arg, queue_t *q, mblk_t *mp, ipsq_func_t func,
struct rtsa_s *sp)
{
ire_t *ire;
ire_t *gw_ire = NULL;
ipif_t *ipif;
boolean_t ipif_refheld = B_FALSE;
uint_t type;
int match_flags = MATCH_IRE_TYPE;
int error;
tsol_gc_t *gc = NULL;
tsol_gcgrp_t *gcgrp = NULL;
boolean_t gcgrp_xtraref = B_FALSE;
if (ire_arg != NULL)
*ire_arg = NULL;
/*
* Prevent routes with a zero gateway from being created (since
* interfaces can currently be plumbed and brought up with no assigned
* address).
*/
if (IN6_IS_ADDR_UNSPECIFIED(gw_addr))
return (ENETUNREACH);
/*
* If this is the case of RTF_HOST being set, then we set the netmask
* to all ones (regardless if one was supplied).
*/
if (flags & RTF_HOST)
mask = &ipv6_all_ones;
/*
* Get the ipif, if any, corresponding to the gw_addr
*/
ipif = ipif_lookup_interface_v6(gw_addr, dst_addr, q, mp, func,
&error);
if (ipif != NULL)
ipif_refheld = B_TRUE;
else if (error == EINPROGRESS) {
ip1dbg(("ip_rt_add_v6: null and EINPROGRESS"));
return (error);
}
/*
* GateD will attempt to create routes with a loopback interface
* address as the gateway and with RTF_GATEWAY set. We allow
* these routes to be added, but create them as interface routes
* since the gateway is an interface address.
*/
if ((ipif != NULL) && (ipif->ipif_ire_type == IRE_LOOPBACK))
flags &= ~RTF_GATEWAY;
/*
* Traditionally, interface routes are ones where RTF_GATEWAY isn't set
* and the gateway address provided is one of the system's interface
* addresses. By using the routing socket interface and supplying an
* RTA_IFP sockaddr with an interface index, an alternate method of
* specifying an interface route to be created is available which uses
* the interface index that specifies the outgoing interface rather than
* the address of an outgoing interface (which may not be able to
* uniquely identify an interface). When coupled with the RTF_GATEWAY
* flag, routes can be specified which not only specify the next-hop to
* be used when routing to a certain prefix, but also which outgoing
* interface should be used.
*
* Previously, interfaces would have unique addresses assigned to them
* and so the address assigned to a particular interface could be used
* to identify a particular interface. One exception to this was the
* case of an unnumbered interface (where IPIF_UNNUMBERED was set).
*
* With the advent of IPv6 and its link-local addresses, this
* restriction was relaxed and interfaces could share addresses between
* themselves. In fact, typically all of the link-local interfaces on
* an IPv6 node or router will have the same link-local address. In
* order to differentiate between these interfaces, the use of an
* interface index is necessary and this index can be carried inside a
* RTA_IFP sockaddr (which is actually a sockaddr_dl). One restriction
* of using the interface index, however, is that all of the ipif's that
* are part of an ill have the same index and so the RTA_IFP sockaddr
* cannot be used to differentiate between ipif's (or logical
* interfaces) that belong to the same ill (physical interface).
*
* For example, in the following case involving IPv4 interfaces and
* logical interfaces
*
* 192.0.2.32 255.255.255.224 192.0.2.33 U if0
* 192.0.2.32 255.255.255.224 192.0.2.34 U if0:1
* 192.0.2.32 255.255.255.224 192.0.2.35 U if0:2
*
* the ipif's corresponding to each of these interface routes can be
* uniquely identified by the "gateway" (actually interface address).
*
* In this case involving multiple IPv6 default routes to a particular
* link-local gateway, the use of RTA_IFP is necessary to specify which
* default route is of interest:
*
* default fe80::123:4567:89ab:cdef U if0
* default fe80::123:4567:89ab:cdef U if1
*/
/* RTF_GATEWAY not set */
if (!(flags & RTF_GATEWAY)) {
queue_t *stq;
if (sp != NULL) {
ip2dbg(("ip_rt_add_v6: gateway security attributes "
"cannot be set with interface route\n"));
if (ipif_refheld)
ipif_refrele(ipif);
return (EINVAL);
}
/*
* As the interface index specified with the RTA_IFP sockaddr is
* the same for all ipif's off of an ill, the matching logic
* below uses MATCH_IRE_ILL if such an index was specified.
* This means that routes sharing the same prefix when added
* using a RTA_IFP sockaddr must have distinct interface
* indices (namely, they must be on distinct ill's).
*
* On the other hand, since the gateway address will usually be
* different for each ipif on the system, the matching logic
* uses MATCH_IRE_IPIF in the case of a traditional interface
* route. This means that interface routes for the same prefix
* can be created if they belong to distinct ipif's and if a
* RTA_IFP sockaddr is not present.
*/
if (ipif_arg != NULL) {
if (ipif_refheld) {
ipif_refrele(ipif);
ipif_refheld = B_FALSE;
}
ipif = ipif_arg;
match_flags |= MATCH_IRE_ILL;
} else {
/*
* Check the ipif corresponding to the gw_addr
*/
if (ipif == NULL)
return (ENETUNREACH);
match_flags |= MATCH_IRE_IPIF;
}
ASSERT(ipif != NULL);
/*
* We check for an existing entry at this point.
*/
match_flags |= MATCH_IRE_MASK;
ire = ire_ftable_lookup_v6(dst_addr, mask, 0, IRE_INTERFACE,
ipif, NULL, ALL_ZONES, 0, NULL, match_flags);
if (ire != NULL) {
ire_refrele(ire);
if (ipif_refheld)
ipif_refrele(ipif);
return (EEXIST);
}
stq = (ipif->ipif_net_type == IRE_IF_RESOLVER)
? ipif->ipif_rq : ipif->ipif_wq;
/*
* Create a copy of the IRE_LOOPBACK, IRE_IF_NORESOLVER or
* IRE_IF_RESOLVER with the modified address and netmask.
*/
ire = ire_create_v6(
dst_addr,
mask,
&ipif->ipif_v6src_addr,
NULL,
&ipif->ipif_mtu,
NULL,
NULL,
stq,
ipif->ipif_net_type,
ipif->ipif_resolver_mp,
ipif,
NULL,
0,
0,
flags,
&ire_uinfo_null,
NULL,
NULL);
if (ire == NULL) {
if (ipif_refheld)
ipif_refrele(ipif);
return (ENOMEM);
}
/*
* Some software (for example, GateD and Sun Cluster) attempts
* to create (what amount to) IRE_PREFIX routes with the
* loopback address as the gateway. This is primarily done to
* set up prefixes with the RTF_REJECT flag set (for example,
* when generating aggregate routes.)
*
* If the IRE type (as defined by ipif->ipif_net_type) is
* IRE_LOOPBACK, then we map the request into a
* IRE_IF_NORESOLVER.
*
* Needless to say, the real IRE_LOOPBACK is NOT created by this
* routine, but rather using ire_create_v6() directly.
*/
if (ipif->ipif_net_type == IRE_LOOPBACK)
ire->ire_type = IRE_IF_NORESOLVER;
error = ire_add(&ire, q, mp, func);
if (error == 0)
goto save_ire;
/*
* In the result of failure, ire_add() will have already
* deleted the ire in question, so there is no need to
* do that here.
*/
if (ipif_refheld)
ipif_refrele(ipif);
return (error);
}
if (ipif_refheld) {
ipif_refrele(ipif);
ipif_refheld = B_FALSE;
}
/*
* Get an interface IRE for the specified gateway.
* If we don't have an IRE_IF_NORESOLVER or IRE_IF_RESOLVER for the
* gateway, it is currently unreachable and we fail the request
* accordingly.
*/
ipif = ipif_arg;
if (ipif_arg != NULL)
match_flags |= MATCH_IRE_ILL;
gw_ire = ire_ftable_lookup_v6(gw_addr, 0, 0, IRE_INTERFACE, ipif_arg,
NULL, ALL_ZONES, 0, NULL, match_flags);
if (gw_ire == NULL)
return (ENETUNREACH);
/*
* We create one of three types of IREs as a result of this request
* based on the netmask. A netmask of all ones (which is automatically
* assumed when RTF_HOST is set) results in an IRE_HOST being created.
* An all zeroes netmask implies a default route so an IRE_DEFAULT is
* created. Otherwise, an IRE_PREFIX route is created for the
* destination prefix.
*/
if (IN6_ARE_ADDR_EQUAL(mask, &ipv6_all_ones))
type = IRE_HOST;
else if (IN6_IS_ADDR_UNSPECIFIED(mask))
type = IRE_DEFAULT;
else
type = IRE_PREFIX;
/* check for a duplicate entry */
ire = ire_ftable_lookup_v6(dst_addr, mask, gw_addr, type, ipif_arg,
NULL, ALL_ZONES, 0, NULL,
match_flags | MATCH_IRE_MASK | MATCH_IRE_GW);
if (ire != NULL) {
ire_refrele(gw_ire);
ire_refrele(ire);
return (EEXIST);
}
/* Security attribute exists */
if (sp != NULL) {
tsol_gcgrp_addr_t ga;
/* find or create the gateway credentials group */
ga.ga_af = AF_INET6;
ga.ga_addr = *gw_addr;
/* we hold reference to it upon success */
gcgrp = gcgrp_lookup(&ga, B_TRUE);
if (gcgrp == NULL) {
ire_refrele(gw_ire);
return (ENOMEM);
}
/*
* Create and add the security attribute to the group; a
* reference to the group is made upon allocating a new
* entry successfully. If it finds an already-existing
* entry for the security attribute in the group, it simply
* returns it and no new reference is made to the group.
*/
gc = gc_create(sp, gcgrp, &gcgrp_xtraref);
if (gc == NULL) {
/* release reference held by gcgrp_lookup */
GCGRP_REFRELE(gcgrp);
ire_refrele(gw_ire);
return (ENOMEM);
}
}
/* Create the IRE. */
ire = ire_create_v6(
dst_addr, /* dest address */
mask, /* mask */
/* src address assigned by the caller? */
(((flags & RTF_SETSRC) && !IN6_IS_ADDR_UNSPECIFIED(src_addr)) ?
src_addr : NULL),
gw_addr, /* gateway address */
&gw_ire->ire_max_frag,
NULL, /* no Fast Path header */
NULL, /* no recv-from queue */
NULL, /* no send-to queue */
(ushort_t)type, /* IRE type */
NULL,
ipif_arg,
NULL,
0,
0,
flags,
&gw_ire->ire_uinfo, /* Inherit ULP info from gw */
gc, /* security attribute */
NULL);
/*
* The ire holds a reference to the 'gc' and the 'gc' holds a
* reference to the 'gcgrp'. We can now release the extra reference
* the 'gcgrp' acquired in the gcgrp_lookup, if it was not used.
*/
if (gcgrp_xtraref)
GCGRP_REFRELE(gcgrp);
if (ire == NULL) {
if (gc != NULL)
GC_REFRELE(gc);
ire_refrele(gw_ire);
return (ENOMEM);
}
/*
* POLICY: should we allow an RTF_HOST with address INADDR_ANY?
* SUN/OS socket stuff does but do we really want to allow ::0 ?
*/
/* Add the new IRE. */
error = ire_add(&ire, q, mp, func);
/*
* In the result of failure, ire_add() will have already
* deleted the ire in question, so there is no need to
* do that here.
*/
if (error != 0) {
ire_refrele(gw_ire);
return (error);
}
if (flags & RTF_MULTIRT) {
/*
* Invoke the CGTP (multirouting) filtering module
* to add the dst address in the filtering database.
* Replicated inbound packets coming from that address
* will be filtered to discard the duplicates.
* It is not necessary to call the CGTP filter hook
* when the dst address is a multicast, because an
* IP source address cannot be a multicast.
*/
if ((ip_cgtp_filter_ops != NULL) &&
!IN6_IS_ADDR_MULTICAST(&(ire->ire_addr_v6))) {
int res = ip_cgtp_filter_ops->cfo_add_dest_v6(
&ire->ire_addr_v6,
&ire->ire_gateway_addr_v6,
&ire->ire_src_addr_v6,
&gw_ire->ire_src_addr_v6);
if (res != 0) {
ire_refrele(gw_ire);
ire_delete(ire);
return (res);
}
}
}
/*
* Now that the prefix IRE entry has been created, delete any
* existing gateway IRE cache entries as well as any IRE caches
* using the gateway, and force them to be created through
* ip_newroute_v6.
*/
if (gc != NULL) {
ASSERT(gcgrp != NULL);
ire_clookup_delete_cache_gw_v6(gw_addr, ALL_ZONES);
}
save_ire:
if (gw_ire != NULL) {
ire_refrele(gw_ire);
}
if (ipif != NULL) {
mblk_t *save_mp;
/*
* Save enough information so that we can recreate the IRE if
* the interface goes down and then up. The metrics associated
* with the route will be saved as well when rts_setmetrics() is
* called after the IRE has been created. In the case where
* memory cannot be allocated, none of this information will be
* saved.
*/
save_mp = allocb(sizeof (ifrt_t), BPRI_MED);
if (save_mp != NULL) {
ifrt_t *ifrt;
save_mp->b_wptr += sizeof (ifrt_t);
ifrt = (ifrt_t *)save_mp->b_rptr;
bzero(ifrt, sizeof (ifrt_t));
ifrt->ifrt_type = ire->ire_type;
ifrt->ifrt_v6addr = ire->ire_addr_v6;
mutex_enter(&ire->ire_lock);
ifrt->ifrt_v6gateway_addr = ire->ire_gateway_addr_v6;
ifrt->ifrt_v6src_addr = ire->ire_src_addr_v6;
mutex_exit(&ire->ire_lock);
ifrt->ifrt_v6mask = ire->ire_mask_v6;
ifrt->ifrt_flags = ire->ire_flags;
ifrt->ifrt_max_frag = ire->ire_max_frag;
mutex_enter(&ipif->ipif_saved_ire_lock);
save_mp->b_cont = ipif->ipif_saved_ire_mp;
ipif->ipif_saved_ire_mp = save_mp;
ipif->ipif_saved_ire_cnt++;
mutex_exit(&ipif->ipif_saved_ire_lock);
}
}
if (ire_arg != NULL) {
/*
* Store the ire that was successfully added into where ire_arg
* points to so that callers don't have to look it up
* themselves (but they are responsible for ire_refrele()ing
* the ire when they are finished with it).
*/
*ire_arg = ire;
} else {
ire_refrele(ire); /* Held in ire_add */
}
if (ipif_refheld)
ipif_refrele(ipif);
return (0);
}
/*
* ip_rt_delete_v6 is called to delete an IPv6 route.
* ipif_arg is passed in to associate it with the correct interface
* (for link-local destinations and gateways).
*/
/* ARGSUSED4 */
int
ip_rt_delete_v6(const in6_addr_t *dst_addr, const in6_addr_t *mask,
const in6_addr_t *gw_addr, uint_t rtm_addrs, int flags, ipif_t *ipif_arg,
queue_t *q, mblk_t *mp, ipsq_func_t func)
{
ire_t *ire = NULL;
ipif_t *ipif;
uint_t type;
uint_t match_flags = MATCH_IRE_TYPE;
int err = 0;
boolean_t ipif_refheld = B_FALSE;
/*
* If this is the case of RTF_HOST being set, then we set the netmask
* to all ones. Otherwise, we use the netmask if one was supplied.
*/
if (flags & RTF_HOST) {
mask = &ipv6_all_ones;
match_flags |= MATCH_IRE_MASK;
} else if (rtm_addrs & RTA_NETMASK) {
match_flags |= MATCH_IRE_MASK;
}
/*
* Note that RTF_GATEWAY is never set on a delete, therefore
* we check if the gateway address is one of our interfaces first,
* and fall back on RTF_GATEWAY routes.
*
* This makes it possible to delete an original
* IRE_IF_NORESOLVER/IRE_IF_RESOLVER - consistent with SunOS 4.1.
*
* As the interface index specified with the RTA_IFP sockaddr is the
* same for all ipif's off of an ill, the matching logic below uses
* MATCH_IRE_ILL if such an index was specified. This means a route
* sharing the same prefix and interface index as the the route
* intended to be deleted might be deleted instead if a RTA_IFP sockaddr
* is specified in the request.
*
* On the other hand, since the gateway address will usually be
* different for each ipif on the system, the matching logic
* uses MATCH_IRE_IPIF in the case of a traditional interface
* route. This means that interface routes for the same prefix can be
* uniquely identified if they belong to distinct ipif's and if a
* RTA_IFP sockaddr is not present.
*
* For more detail on specifying routes by gateway address and by
* interface index, see the comments in ip_rt_add_v6().
*/
ipif = ipif_lookup_interface_v6(gw_addr, dst_addr, q, mp, func, &err);
if (ipif != NULL) {
ipif_refheld = B_TRUE;
if (ipif_arg != NULL) {
ipif_refrele(ipif);
ipif_refheld = B_FALSE;
ipif = ipif_arg;
match_flags |= MATCH_IRE_ILL;
} else {
match_flags |= MATCH_IRE_IPIF;
}
if (ipif->ipif_ire_type == IRE_LOOPBACK)
ire = ire_ctable_lookup_v6(dst_addr, 0, IRE_LOOPBACK,
ipif, ALL_ZONES, NULL, match_flags);
if (ire == NULL)
ire = ire_ftable_lookup_v6(dst_addr, mask, 0,
IRE_INTERFACE, ipif, NULL, ALL_ZONES, 0, NULL,
match_flags);
} else if (err == EINPROGRESS) {
return (err);
} else {
err = 0;
}
if (ire == NULL) {
/*
* At this point, the gateway address is not one of our own
* addresses or a matching interface route was not found. We
* set the IRE type to lookup based on whether
* this is a host route, a default route or just a prefix.
*
* If an ipif_arg was passed in, then the lookup is based on an
* interface index so MATCH_IRE_ILL is added to match_flags.
* In any case, MATCH_IRE_IPIF is cleared and MATCH_IRE_GW is
* set as the route being looked up is not a traditional
* interface route.
*/
match_flags &= ~MATCH_IRE_IPIF;
match_flags |= MATCH_IRE_GW;
if (ipif_arg != NULL)
match_flags |= MATCH_IRE_ILL;
if (IN6_ARE_ADDR_EQUAL(mask, &ipv6_all_ones))
type = IRE_HOST;
else if (IN6_IS_ADDR_UNSPECIFIED(mask))
type = IRE_DEFAULT;
else
type = IRE_PREFIX;
ire = ire_ftable_lookup_v6(dst_addr, mask, gw_addr, type,
ipif_arg, NULL, ALL_ZONES, 0, NULL, match_flags);
if (ire == NULL && type == IRE_HOST) {
ire = ire_ftable_lookup_v6(dst_addr, mask, gw_addr,
IRE_HOST_REDIRECT, ipif_arg, NULL, ALL_ZONES, 0,
NULL, match_flags);
}
}
if (ipif_refheld) {
ipif_refrele(ipif);
ipif_refheld = B_FALSE;
}
if (ire == NULL)
return (ESRCH);
if (ire->ire_flags & RTF_MULTIRT) {
/*
* Invoke the CGTP (multirouting) filtering module
* to remove the dst address from the filtering database.
* Packets coming from that address will no longer be
* filtered to remove duplicates.
*/
if (ip_cgtp_filter_ops != NULL) {
err = ip_cgtp_filter_ops->cfo_del_dest_v6(
&ire->ire_addr_v6, &ire->ire_gateway_addr_v6);
}
}
ipif = ire->ire_ipif;
if (ipif != NULL) {
mblk_t **mpp;
mblk_t *mp;
ifrt_t *ifrt;
in6_addr_t gw_addr_v6;
/* Remove from ipif_saved_ire_mp list if it is there */
mutex_enter(&ire->ire_lock);
gw_addr_v6 = ire->ire_gateway_addr_v6;
mutex_exit(&ire->ire_lock);
mutex_enter(&ipif->ipif_saved_ire_lock);
for (mpp = &ipif->ipif_saved_ire_mp; *mpp != NULL;
mpp = &(*mpp)->b_cont) {
/*
* On a given ipif, the triple of address, gateway and
* mask is unique for each saved IRE (in the case of
* ordinary interface routes, the gateway address is
* all-zeroes).
*/
mp = *mpp;
ifrt = (ifrt_t *)mp->b_rptr;
if (IN6_ARE_ADDR_EQUAL(&ifrt->ifrt_v6addr,
&ire->ire_addr_v6) &&
IN6_ARE_ADDR_EQUAL(&ifrt->ifrt_v6gateway_addr,
&gw_addr_v6) &&
IN6_ARE_ADDR_EQUAL(&ifrt->ifrt_v6mask,
&ire->ire_mask_v6)) {
*mpp = mp->b_cont;
ipif->ipif_saved_ire_cnt--;
freeb(mp);
break;
}
}
mutex_exit(&ipif->ipif_saved_ire_lock);
}
ire_delete(ire);
ire_refrele(ire);
return (err);
}
/*
* Derive a token from the link layer address.
*/
boolean_t
ill_setdefaulttoken(ill_t *ill)
{
int i;
in6_addr_t v6addr, v6mask;
/*
* Though we execute on the ipsq, we need to hold the ill_lock
* to prevent readers from seeing partially updated values
* while we do the update.
*/
mutex_enter(&ill->ill_lock);
if (!MEDIA_V6INTFID(ill->ill_media, ill->ill_phys_addr_length,
ill->ill_phys_addr, &v6addr)) {
mutex_exit(&ill->ill_lock);
return (B_FALSE);
}
(void) ip_plen_to_mask_v6(IPV6_TOKEN_LEN, &v6mask);
for (i = 0; i < 4; i++)
v6mask.s6_addr32[i] = v6mask.s6_addr32[i] ^
(uint32_t)0xffffffff;
V6_MASK_COPY(v6addr, v6mask, ill->ill_token);
ill->ill_token_length = IPV6_TOKEN_LEN;
mutex_exit(&ill->ill_lock);
return (B_TRUE);
}
/*
* Create a link-local address from a token.
*/
static void
ipif_get_linklocal(in6_addr_t *dest, const in6_addr_t *token)
{
int i;
for (i = 0; i < 4; i++) {
dest->s6_addr32[i] =
token->s6_addr32[i] | ipv6_ll_template.s6_addr32[i];
}
}
/*
* Set a nice default address for either automatic tunnels tsrc/96 or
* 6to4 tunnels 2002:<tsrc>::1/64
*/
static void
ipif_set_tun_auto_addr(ipif_t *ipif, struct iftun_req *ta)
{
sin6_t sin6;
sin_t *sin;
ill_t *ill = ipif->ipif_ill;
tun_t *tp = (tun_t *)ill->ill_wq->q_next->q_ptr;
if (ta->ifta_saddr.ss_family != AF_INET ||
(ipif->ipif_flags & IPIF_UP) || !ipif->ipif_isv6 ||
(ta->ifta_flags & IFTUN_SRC) == 0)
return;
/*
* Check the tunnel type by examining q_next->q_ptr
*/
if (tp->tun_flags & TUN_AUTOMATIC) {
/* this is an automatic tunnel */
(void) ip_plen_to_mask_v6(IPV6_ABITS - IP_ABITS,
&ipif->ipif_v6net_mask);
bzero(&sin6, sizeof (sin6_t));
sin = (sin_t *)&ta->ifta_saddr;
V4_PART_OF_V6(sin6.sin6_addr) = sin->sin_addr.s_addr;
sin6.sin6_family = AF_INET6;
(void) ip_sioctl_addr(ipif, (sin_t *)&sin6,
NULL, NULL, NULL, NULL);
} else if (tp->tun_flags & TUN_6TO4) {
/* this is a 6to4 tunnel */
(void) ip_plen_to_mask_v6(IPV6_PREFIX_LEN,
&ipif->ipif_v6net_mask);
sin = (sin_t *)&ta->ifta_saddr;
/* create a 6to4 address from the IPv4 tsrc */
IN6_V4ADDR_TO_6TO4(&sin->sin_addr, &sin6.sin6_addr);
sin6.sin6_family = AF_INET6;
(void) ip_sioctl_addr(ipif, (sin_t *)&sin6,
NULL, NULL, NULL, NULL);
} else {
ip1dbg(("ipif_set_tun_auto_addr: Unknown tunnel type"));
return;
}
}
/*
* Set link local for ipif_id 0 of a configured tunnel based on the
* tsrc or tdst parameter
* For tunnels over IPv4 use the IPv4 address prepended with 32 zeros as
* the token.
* For tunnels over IPv6 use the low-order 64 bits of the "inner" IPv6 address
* as the token for the "outer" link.
*/
void
ipif_set_tun_llink(ill_t *ill, struct iftun_req *ta)
{
ipif_t *ipif;
sin_t *sin;
in6_addr_t *s6addr;
ASSERT(IAM_WRITER_ILL(ill));
/* The first ipif must be id zero. */
ipif = ill->ill_ipif;
ASSERT(ipif->ipif_id == 0);
/* no link local for automatic tunnels */
if (!(ipif->ipif_flags & IPIF_POINTOPOINT)) {
ipif_set_tun_auto_addr(ipif, ta);
return;
}
if ((ta->ifta_flags & IFTUN_DST) &&
IN6_IS_ADDR_UNSPECIFIED(&ipif->ipif_v6pp_dst_addr)) {
sin6_t sin6;
ASSERT(!(ipif->ipif_flags & IPIF_UP));
bzero(&sin6, sizeof (sin6_t));
if ((ta->ifta_saddr.ss_family == AF_INET)) {
sin = (sin_t *)&ta->ifta_daddr;
V4_PART_OF_V6(sin6.sin6_addr) =
sin->sin_addr.s_addr;
} else {
s6addr =
&((sin6_t *)&ta->ifta_daddr)->sin6_addr;
sin6.sin6_addr.s6_addr32[3] = s6addr->s6_addr32[3];
sin6.sin6_addr.s6_addr32[2] = s6addr->s6_addr32[2];
}
ipif_get_linklocal(&ipif->ipif_v6pp_dst_addr,
&sin6.sin6_addr);
ipif->ipif_v6subnet = ipif->ipif_v6pp_dst_addr;
}
if ((ta->ifta_flags & IFTUN_SRC)) {
ASSERT(!(ipif->ipif_flags & IPIF_UP));
/* Set the token if it isn't already set */
if (IN6_IS_ADDR_UNSPECIFIED(&ill->ill_token)) {
if ((ta->ifta_saddr.ss_family == AF_INET)) {
sin = (sin_t *)&ta->ifta_saddr;
V4_PART_OF_V6(ill->ill_token) =
sin->sin_addr.s_addr;
} else {
s6addr =
&((sin6_t *)&ta->ifta_saddr)->sin6_addr;
ill->ill_token.s6_addr32[3] =
s6addr->s6_addr32[3];
ill->ill_token.s6_addr32[2] =
s6addr->s6_addr32[2];
}
ill->ill_token_length = IPV6_TOKEN_LEN;
}
/*
* Attempt to set the link local address if it isn't set.
*/
if (IN6_IS_ADDR_UNSPECIFIED(&ipif->ipif_v6lcl_addr))
(void) ipif_setlinklocal(ipif);
}
}
/*
* Is it not possible to set the link local address?
* The address can be set if the token is set, and the token
* isn't too long.
* Return B_TRUE if the address can't be set, or B_FALSE if it can.
*/
boolean_t
ipif_cant_setlinklocal(ipif_t *ipif)
{
ill_t *ill = ipif->ipif_ill;
if (IN6_IS_ADDR_UNSPECIFIED(&ill->ill_token) ||
ill->ill_token_length > IPV6_ABITS - IPV6_LL_PREFIXLEN)
return (B_TRUE);
return (B_FALSE);
}
/*
* Generate a link-local address from the token.
* Return zero if the address was set, or non-zero if it couldn't be set.
*/
int
ipif_setlinklocal(ipif_t *ipif)
{
ill_t *ill = ipif->ipif_ill;
ASSERT(IAM_WRITER_ILL(ill));
if (ipif_cant_setlinklocal(ipif))
return (-1);
ipif_get_linklocal(&ipif->ipif_v6lcl_addr, &ill->ill_token);
(void) ip_plen_to_mask_v6(IPV6_LL_PREFIXLEN, &ipif->ipif_v6net_mask);
V6_MASK_COPY(ipif->ipif_v6lcl_addr, ipif->ipif_v6net_mask,
ipif->ipif_v6subnet);
if (ipif->ipif_flags & IPIF_NOLOCAL) {
ipif->ipif_v6src_addr = ipv6_all_zeros;
} else {
ipif->ipif_v6src_addr = ipif->ipif_v6lcl_addr;
}
return (0);
}
/*
* This function sets up the multicast mappings in NDP.
* Unlike ARP, there are no mapping_mps here. We delete the
* mapping nces and add a new one.
*
* Returns non-zero on error and 0 on success.
*/
int
ipif_ndp_setup_multicast(ipif_t *ipif, nce_t **ret_nce)
{
ill_t *ill = ipif->ipif_ill;
in6_addr_t v6_mcast_addr = {(uint32_t)V6_MCAST, 0, 0, 0};
in6_addr_t v6_mcast_mask = {(uint32_t)V6_MCAST, 0, 0, 0};
in6_addr_t v6_extract_mask;
uchar_t *phys_addr, *bphys_addr, *alloc_phys;
nce_t *mnce = NULL;
int err = 0;
phyint_t *phyi = ill->ill_phyint;
uint32_t hw_extract_start;
dl_unitdata_req_t *dlur;
if (ret_nce != NULL)
*ret_nce = NULL;
/*
* Delete the mapping nce. Normally these should not exist
* as a previous ipif_down -> ipif_ndp_down should have deleted
* all the nces. But they can exist if ip_rput_dlpi_writer
* calls this when PHYI_MULTI_BCAST is set.
*/
mnce = ndp_lookup(ill, &v6_mcast_addr, B_FALSE);
if (mnce != NULL) {
ndp_delete(mnce);
NCE_REFRELE(mnce);
mnce = NULL;
}
/*
* Get media specific v6 mapping information. Note that
* nd_lla_len can be 0 for tunnels.
*/
alloc_phys = kmem_alloc(ill->ill_nd_lla_len, KM_NOSLEEP);
if ((alloc_phys == NULL) && (ill->ill_nd_lla_len != 0))
return (ENOMEM);
/*
* Determine the broadcast address.
*/
dlur = (dl_unitdata_req_t *)ill->ill_bcast_mp->b_rptr;
if (ill->ill_sap_length < 0)
bphys_addr = (uchar_t *)dlur + dlur->dl_dest_addr_offset;
else
bphys_addr = (uchar_t *)dlur +
dlur->dl_dest_addr_offset + ill->ill_sap_length;
/*
* Check PHYI_MULTI_BCAST and possible length of physical
* address to determine if we use the mapping or the
* broadcast address.
*/
if ((phyi->phyint_flags & PHYI_MULTI_BCAST) ||
(!MEDIA_V6MINFO(ill->ill_media, ill->ill_nd_lla_len,
bphys_addr, alloc_phys, &hw_extract_start,
&v6_extract_mask))) {
if (ill->ill_phys_addr_length > IP_MAX_HW_LEN) {
kmem_free(alloc_phys, ill->ill_nd_lla_len);
return (E2BIG);
}
/* Use the link-layer broadcast address for MULTI_BCAST */
phys_addr = bphys_addr;
bzero(&v6_extract_mask, sizeof (v6_extract_mask));
hw_extract_start = ill->ill_nd_lla_len;
} else {
phys_addr = alloc_phys;
}
if ((ipif->ipif_flags & IPIF_BROADCAST) ||
(ill->ill_flags & ILLF_MULTICAST) ||
(phyi->phyint_flags & PHYI_MULTI_BCAST)) {
mutex_enter(&ndp_g_lock);
err = ndp_add(ill,
phys_addr,
&v6_mcast_addr, /* v6 address */
&v6_mcast_mask, /* v6 mask */
&v6_extract_mask,
hw_extract_start,
NCE_F_MAPPING | NCE_F_PERMANENT | NCE_F_NONUD,
ND_REACHABLE,
&mnce);
mutex_exit(&ndp_g_lock);
if (err == 0) {
if (ret_nce != NULL) {
*ret_nce = mnce;
} else {
NCE_REFRELE(mnce);
}
}
}
kmem_free(alloc_phys, ill->ill_nd_lla_len);
return (err);
}
/*
* Get the resolver set up for a new interface address. (Always called
* as writer.)
*/
int
ipif_ndp_up(ipif_t *ipif, const in6_addr_t *addr, boolean_t macaddr_change)
{
ill_t *ill = ipif->ipif_ill;
int err = 0;
nce_t *nce = NULL;
nce_t *mnce = NULL;
ip1dbg(("ipif_ndp_up(%s:%u)\n",
ipif->ipif_ill->ill_name, ipif->ipif_id));
/*
* ND not supported on XRESOLV interfaces. If ND support (multicast)
* added later, take out this check.
*/
if (ill->ill_flags & ILLF_XRESOLV)
return (0);
if (IN6_IS_ADDR_UNSPECIFIED(addr) ||
(!(ill->ill_net_type & IRE_INTERFACE)))
return (0);
/*
* Need to setup multicast mapping only when the first
* interface is coming UP.
*/
if (ill->ill_ipif_up_count == 0 &&
(ill->ill_flags & ILLF_MULTICAST)) {
/*
* We set the multicast before setting up the mapping for
* local address because ipif_ndp_setup_multicast does
* ndp_walk to delete nces which will delete the mapping
* for local address also if we added the mapping for
* local address first.
*/
err = ipif_ndp_setup_multicast(ipif, &mnce);
if (err != 0)
return (err);
}
if ((ipif->ipif_flags & (IPIF_UNNUMBERED|IPIF_NOLOCAL)) == 0) {
uint16_t flags;
uchar_t *hw_addr = NULL;
/* Permanent entries don't need NUD */
flags = NCE_F_PERMANENT;
flags |= NCE_F_NONUD;
if (ill->ill_flags & ILLF_ROUTER)
flags |= NCE_F_ISROUTER;
if (ipif->ipif_flags & IPIF_ANYCAST)
flags |= NCE_F_ANYCAST;
if (ill->ill_net_type == IRE_IF_RESOLVER) {
hw_addr = ill->ill_nd_lla;
if (ill->ill_move_in_progress || macaddr_change) {
/*
* Addresses are failing over to this ill.
* Don't wait for NUD to see this change.
* Publish our new link-layer address.
*/
flags |= NCE_F_UNSOL_ADV;
}
}
err = ndp_lookup_then_add(ill,
hw_addr,
addr,
&ipv6_all_ones,
&ipv6_all_zeros,
0,
flags,
ND_REACHABLE,
&nce);
switch (err) {
case 0:
ip1dbg(("ipif_ndp_up: NCE created for %s\n",
ill->ill_name));
break;
case EEXIST:
NCE_REFRELE(nce);
ip1dbg(("ipif_ndp_up: NCE already exists for %s\n",
ill->ill_name));
if (mnce != NULL) {
ndp_delete(mnce);
NCE_REFRELE(mnce);
}
return (err);
default:
ip1dbg(("ipif_ndp_up: NCE creation failed %s\n",
ill->ill_name));
if (mnce != NULL) {
ndp_delete(mnce);
NCE_REFRELE(mnce);
}
return (err);
}
}
if (nce != NULL)
NCE_REFRELE(nce);
if (mnce != NULL)
NCE_REFRELE(mnce);
return (0);
}
/* Remove all cache entries for this logical interface */
void
ipif_ndp_down(ipif_t *ipif)
{
nce_t *nce;
nce = ndp_lookup(ipif->ipif_ill, &ipif->ipif_v6lcl_addr, B_FALSE);
if (nce != NULL) {
ndp_delete(nce);
NCE_REFRELE(nce);
}
/*
* Remove mapping and all other nces dependent on this ill
* when the last ipif is going away.
*/
if (ipif->ipif_ill->ill_ipif_up_count == 0) {
ndp_walk(ipif->ipif_ill, (pfi_t)ndp_delete_per_ill,
(uchar_t *)ipif->ipif_ill);
}
}
/*
* Used when an interface comes up to recreate any extra routes on this
* interface.
*/
static ire_t **
ipif_recover_ire_v6(ipif_t *ipif)
{
mblk_t *mp;
ire_t **ipif_saved_irep;
ire_t **irep;
ip1dbg(("ipif_recover_ire_v6(%s:%u)", ipif->ipif_ill->ill_name,
ipif->ipif_id));
ASSERT(ipif->ipif_isv6);
mutex_enter(&ipif->ipif_saved_ire_lock);
ipif_saved_irep = (ire_t **)kmem_zalloc(sizeof (ire_t *) *
ipif->ipif_saved_ire_cnt, KM_NOSLEEP);
if (ipif_saved_irep == NULL) {
mutex_exit(&ipif->ipif_saved_ire_lock);
return (NULL);
}
irep = ipif_saved_irep;
for (mp = ipif->ipif_saved_ire_mp; mp != NULL; mp = mp->b_cont) {
ire_t *ire;
queue_t *rfq;
queue_t *stq;
ifrt_t *ifrt;
in6_addr_t *src_addr;
in6_addr_t *gateway_addr;
mblk_t *resolver_mp;
char buf[INET6_ADDRSTRLEN];
ushort_t type;
/*
* When the ire was initially created and then added in
* ip_rt_add_v6(), it was created either using
* ipif->ipif_net_type in the case of a traditional interface
* route, or as one of the IRE_OFFSUBNET types (with the
* exception of IRE_HOST_REDIRECT which is created by
* icmp_redirect_v6() and which we don't need to save or
* recover). In the case where ipif->ipif_net_type was
* IRE_LOOPBACK, ip_rt_add_v6() will update the ire_type to
* IRE_IF_NORESOLVER before calling ire_add_v6() to satisfy
* software like GateD and Sun Cluster which creates routes
* using the the loopback interface's address as a gateway.
*
* As ifrt->ifrt_type reflects the already updated ire_type and
* since ire_create_v6() expects that IRE_IF_NORESOLVER will
* have a valid ire_dlureq_mp field (which doesn't make sense
* for a IRE_LOOPBACK), ire_create_v6() will be called in the
* same way here as in ip_rt_add_v6(), namely using
* ipif->ipif_net_type when the route looks like a traditional
* interface route (where ifrt->ifrt_type & IRE_INTERFACE is
* true) and otherwise using the saved ifrt->ifrt_type. This
* means that in the case where ipif->ipif_net_type is
* IRE_LOOPBACK, the ire created by ire_create_v6() will be an
* IRE_LOOPBACK, it will then be turned into an
* IRE_IF_NORESOLVER and then added by ire_add_v6().
*/
ifrt = (ifrt_t *)mp->b_rptr;
if (ifrt->ifrt_type & IRE_INTERFACE) {
rfq = NULL;
stq = (ipif->ipif_net_type == IRE_IF_RESOLVER)
? ipif->ipif_rq : ipif->ipif_wq;
src_addr = (ifrt->ifrt_flags & RTF_SETSRC)
? &ifrt->ifrt_v6src_addr
: &ipif->ipif_v6src_addr;
gateway_addr = NULL;
resolver_mp = ipif->ipif_resolver_mp;
type = ipif->ipif_net_type;
} else {
rfq = NULL;
stq = NULL;
src_addr = (ifrt->ifrt_flags & RTF_SETSRC)
? &ifrt->ifrt_v6src_addr : NULL;
gateway_addr = &ifrt->ifrt_v6gateway_addr;
resolver_mp = NULL;
type = ifrt->ifrt_type;
}
/*
* Create a copy of the IRE with the saved address and netmask.
*/
ip1dbg(("ipif_recover_ire_v6: creating IRE %s (%d) for %s/%d\n",
ip_nv_lookup(ire_nv_tbl, ifrt->ifrt_type), ifrt->ifrt_type,
inet_ntop(AF_INET6, &ifrt->ifrt_v6addr, buf, sizeof (buf)),
ip_mask_to_plen_v6(&ifrt->ifrt_v6mask)));
ire = ire_create_v6(
&ifrt->ifrt_v6addr,
&ifrt->ifrt_v6mask,
src_addr,
gateway_addr,
&ifrt->ifrt_max_frag,
NULL,
rfq,
stq,
type,
resolver_mp,
ipif,
NULL,
0,
0,
ifrt->ifrt_flags,
&ifrt->ifrt_iulp_info,
NULL,
NULL);
if (ire == NULL) {
mutex_exit(&ipif->ipif_saved_ire_lock);
kmem_free(ipif_saved_irep,
ipif->ipif_saved_ire_cnt * sizeof (ire_t *));
return (NULL);
}
/*
* Some software (for example, GateD and Sun Cluster) attempts
* to create (what amount to) IRE_PREFIX routes with the
* loopback address as the gateway. This is primarily done to
* set up prefixes with the RTF_REJECT flag set (for example,
* when generating aggregate routes.)
*
* If the IRE type (as defined by ipif->ipif_net_type) is
* IRE_LOOPBACK, then we map the request into a
* IRE_IF_NORESOLVER.
*/
if (ipif->ipif_net_type == IRE_LOOPBACK)
ire->ire_type = IRE_IF_NORESOLVER;
/*
* ire held by ire_add, will be refreled' in ipif_up_done
* towards the end
*/
(void) ire_add(&ire, NULL, NULL, NULL);
*irep = ire;
irep++;
ip1dbg(("ipif_recover_ire_v6: added ire %p\n", (void *)ire));
}
mutex_exit(&ipif->ipif_saved_ire_lock);
return (ipif_saved_irep);
}
/*
* Return the scope of the given IPv6 address. If the address is an
* IPv4 mapped IPv6 address, return the scope of the corresponding
* IPv4 address.
*/
in6addr_scope_t
ip_addr_scope_v6(const in6_addr_t *addr)
{
static in6_addr_t ipv6loopback = IN6ADDR_LOOPBACK_INIT;
if (IN6_IS_ADDR_V4MAPPED(addr)) {
in_addr_t v4addr_h = ntohl(V4_PART_OF_V6((*addr)));
if ((v4addr_h >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET ||
(v4addr_h & IN_AUTOCONF_MASK) == IN_AUTOCONF_NET)
return (IP6_SCOPE_LINKLOCAL);
if ((v4addr_h & IN_PRIVATE8_MASK) == IN_PRIVATE8_NET ||
(v4addr_h & IN_PRIVATE12_MASK) == IN_PRIVATE12_NET ||
(v4addr_h & IN_PRIVATE16_MASK) == IN_PRIVATE16_NET)
return (IP6_SCOPE_SITELOCAL);
return (IP6_SCOPE_GLOBAL);
}
if (IN6_IS_ADDR_MULTICAST(addr))
return (IN6_ADDR_MC_SCOPE(addr));
/* link-local and loopback addresses are of link-local scope */
if (IN6_IS_ADDR_LINKLOCAL(addr) ||
IN6_ARE_ADDR_EQUAL(addr, &ipv6loopback))
return (IP6_SCOPE_LINKLOCAL);
if (IN6_IS_ADDR_SITELOCAL(addr))
return (IP6_SCOPE_SITELOCAL);
return (IP6_SCOPE_GLOBAL);
}
/*
* Calculates the xor of a1 and a2, and stores the result in res.
*/
static void
ip_addr_xor_v6(const in6_addr_t *a1, const in6_addr_t *a2, in6_addr_t *res)
{
int i;
for (i = 0; i < 4; i++)
res->s6_addr32[i] = a1->s6_addr32[i] ^ a2->s6_addr32[i];
}
#define IPIF_VALID_IPV6_SOURCE(ipif) \
(((ipif)->ipif_flags & IPIF_UP) && \
!((ipif)->ipif_flags & (IPIF_NOLOCAL|IPIF_ANYCAST)))
/* source address candidate */
typedef struct candidate {
ipif_t *cand_ipif;
/* The properties of this candidate */
boolean_t cand_isdst;
boolean_t cand_isdst_set;
in6addr_scope_t cand_scope;
boolean_t cand_scope_set;
boolean_t cand_isdeprecated;
boolean_t cand_isdeprecated_set;
boolean_t cand_ispreferred;
boolean_t cand_ispreferred_set;
boolean_t cand_matchedinterface;
boolean_t cand_matchedinterface_set;
boolean_t cand_matchedlabel;
boolean_t cand_matchedlabel_set;
boolean_t cand_istmp;
boolean_t cand_istmp_set;
in6_addr_t cand_xor;
boolean_t cand_xor_set;
} cand_t;
#define cand_srcaddr cand_ipif->ipif_v6lcl_addr
#define cand_flags cand_ipif->ipif_flags
#define cand_ill cand_ipif->ipif_ill
#define cand_zoneid cand_ipif->ipif_zoneid
/* information about the destination for source address selection */
typedef struct dstinfo {
const in6_addr_t *dst_addr;
ill_t *dst_ill;
boolean_t dst_restrict_ill;
boolean_t dst_prefer_src_tmp;
in6addr_scope_t dst_scope;
char *dst_label;
} dstinfo_t;
/*
* The following functions are rules used to select a source address in
* ipif_select_source_v6(). Each rule compares a current candidate (cc)
* against the best candidate (bc). Each rule has three possible outcomes;
* the candidate is preferred over the best candidate (CAND_PREFER), the
* candidate is not preferred over the best candidate (CAND_AVOID), or the
* candidate is of equal value as the best candidate (CAND_TIE).
*
* These rules are part of a greater "Default Address Selection for IPv6"
* sheme, which is standards based work coming out of the IETF ipv6 working
* group. The IETF document defines both IPv6 source address selection and
* destination address ordering. The rules defined here implement the IPv6
* source address selection. Destination address ordering is done by
* libnsl, and uses a similar set of rules to implement the sorting.
*/
typedef enum {CAND_AVOID, CAND_TIE, CAND_PREFER} rule_res_t;
typedef rule_res_t (*rulef_t)(cand_t *, cand_t *, const dstinfo_t *);
/* Prefer an address if it is equal to the destination address. */
static rule_res_t
rule_isdst(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo)
{
if (!bc->cand_isdst_set) {
bc->cand_isdst =
IN6_ARE_ADDR_EQUAL(&bc->cand_srcaddr, dstinfo->dst_addr);
bc->cand_isdst_set = B_TRUE;
}
cc->cand_isdst =
IN6_ARE_ADDR_EQUAL(&cc->cand_srcaddr, dstinfo->dst_addr);
cc->cand_isdst_set = B_TRUE;
if (cc->cand_isdst == bc->cand_isdst)
return (CAND_TIE);
else if (cc->cand_isdst)
return (CAND_PREFER);
else
return (CAND_AVOID);
}
/*
* Prefer addresses that are of closest scope to the destination. Always
* prefer addresses that are of greater scope than the destination over
* those that are of lesser scope than the destination.
*/
static rule_res_t
rule_scope(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo)
{
if (!bc->cand_scope_set) {
bc->cand_scope = ip_addr_scope_v6(&bc->cand_srcaddr);
bc->cand_scope_set = B_TRUE;
}
cc->cand_scope = ip_addr_scope_v6(&cc->cand_srcaddr);
cc->cand_scope_set = B_TRUE;
if (cc->cand_scope < bc->cand_scope) {
if (cc->cand_scope < dstinfo->dst_scope)
return (CAND_AVOID);
else
return (CAND_PREFER);
} else if (bc->cand_scope < cc->cand_scope) {
if (bc->cand_scope < dstinfo->dst_scope)
return (CAND_PREFER);
else
return (CAND_AVOID);
} else {
return (CAND_TIE);
}
}
/*
* Prefer non-deprecated source addresses.
*/
/* ARGSUSED2 */
static rule_res_t
rule_deprecated(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo)
{
if (!bc->cand_isdeprecated_set) {
bc->cand_isdeprecated =
((bc->cand_flags & IPIF_DEPRECATED) != 0);
bc->cand_isdeprecated_set = B_TRUE;
}
cc->cand_isdeprecated = ((cc->cand_flags & IPIF_DEPRECATED) != 0);
cc->cand_isdeprecated_set = B_TRUE;
if (bc->cand_isdeprecated == cc->cand_isdeprecated)
return (CAND_TIE);
else if (cc->cand_isdeprecated)
return (CAND_AVOID);
else
return (CAND_PREFER);
}
/*
* Prefer source addresses that have the IPIF_PREFERRED flag set. This
* rule must be before rule_interface because the flag could be set on any
* interface, not just the interface being used for outgoing packets (for
* example, the IFF_PREFERRED could be set on an address assigned to the
* loopback interface).
*/
/* ARGSUSED2 */
static rule_res_t
rule_preferred(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo)
{
if (!bc->cand_ispreferred_set) {
bc->cand_ispreferred = ((bc->cand_flags & IPIF_PREFERRED) != 0);
bc->cand_ispreferred_set = B_TRUE;
}
cc->cand_ispreferred = ((cc->cand_flags & IPIF_PREFERRED) != 0);
cc->cand_ispreferred_set = B_TRUE;
if (bc->cand_ispreferred == cc->cand_ispreferred)
return (CAND_TIE);
else if (cc->cand_ispreferred)
return (CAND_PREFER);
else
return (CAND_AVOID);
}
/*
* Prefer source addresses that are assigned to the outgoing interface, or
* to an interface that is in the same IPMP group as the outgoing
* interface.
*/
static rule_res_t
rule_interface(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo)
{
ill_t *dstill = dstinfo->dst_ill;
/*
* If dstinfo->dst_restrict_ill is set, this rule is unnecessary
* since we know all candidates will be on the same link.
*/
if (dstinfo->dst_restrict_ill)
return (CAND_TIE);
if (!bc->cand_matchedinterface_set) {
bc->cand_matchedinterface = (bc->cand_ill == dstill ||
(dstill->ill_group != NULL &&
dstill->ill_group == bc->cand_ill->ill_group));
bc->cand_matchedinterface_set = B_TRUE;
}
cc->cand_matchedinterface = (cc->cand_ill == dstill ||
(dstill->ill_group != NULL &&
dstill->ill_group == cc->cand_ill->ill_group));
cc->cand_matchedinterface_set = B_TRUE;
if (bc->cand_matchedinterface == cc->cand_matchedinterface)
return (CAND_TIE);
else if (cc->cand_matchedinterface)
return (CAND_PREFER);
else
return (CAND_AVOID);
}
/*
* Prefer source addresses whose label matches the destination's label.
*/
static rule_res_t
rule_label(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo)
{
char *label;
if (!bc->cand_matchedlabel_set) {
label = ip6_asp_lookup(&bc->cand_srcaddr, NULL);
bc->cand_matchedlabel =
ip6_asp_labelcmp(label, dstinfo->dst_label);
bc->cand_matchedlabel_set = B_TRUE;
}
label = ip6_asp_lookup(&cc->cand_srcaddr, NULL);
cc->cand_matchedlabel = ip6_asp_labelcmp(label, dstinfo->dst_label);
cc->cand_matchedlabel_set = B_TRUE;
if (bc->cand_matchedlabel == cc->cand_matchedlabel)
return (CAND_TIE);
else if (cc->cand_matchedlabel)
return (CAND_PREFER);
else
return (CAND_AVOID);
}
/*
* Prefer public addresses over temporary ones. An application can reverse
* the logic of this rule and prefer temporary addresses by using the
* IPV6_SRC_PREFERENCES socket option.
*/
static rule_res_t
rule_temporary(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo)
{
if (!bc->cand_istmp_set) {
bc->cand_istmp = ((bc->cand_flags & IPIF_TEMPORARY) != 0);
bc->cand_istmp_set = B_TRUE;
}
cc->cand_istmp = ((cc->cand_flags & IPIF_TEMPORARY) != 0);
cc->cand_istmp_set = B_TRUE;
if (bc->cand_istmp == cc->cand_istmp)
return (CAND_TIE);
if (dstinfo->dst_prefer_src_tmp && cc->cand_istmp)
return (CAND_PREFER);
else if (!dstinfo->dst_prefer_src_tmp && !cc->cand_istmp)
return (CAND_PREFER);
else
return (CAND_AVOID);
}
/*
* Prefer source addresses with longer matching prefix with the
* destination. Since this is the last rule, it must not produce a tie.
* We do the longest matching prefix calculation and the tie break in one
* calculation by doing an xor of both addresses with the destination, and
* pick the address with the smallest xor value. That way, we're both
* picking the address with the longest matching prefix, and breaking the
* tie if they happen to have both have equal mathing prefixes.
*/
static rule_res_t
rule_prefix(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo)
{
int i;
if (!bc->cand_xor_set) {
ip_addr_xor_v6(&bc->cand_srcaddr,
dstinfo->dst_addr, &bc->cand_xor);
bc->cand_xor_set = B_TRUE;
}
ip_addr_xor_v6(&cc->cand_srcaddr, dstinfo->dst_addr, &cc->cand_xor);
cc->cand_xor_set = B_TRUE;
for (i = 0; i < 4; i++) {
if (bc->cand_xor.s6_addr32[i] != cc->cand_xor.s6_addr32[i])
break;
}
if (cc->cand_xor.s6_addr32[i] < bc->cand_xor.s6_addr32[i])
return (CAND_PREFER);
else
return (CAND_AVOID);
}
/*
* Prefer to use zone-specific addresses when possible instead of all-zones
* addresses.
*/
/* ARGSUSED2 */
static rule_res_t
rule_zone_specific(cand_t *bc, cand_t *cc, const dstinfo_t *dstinfo)
{
if ((bc->cand_zoneid == ALL_ZONES) ==
(cc->cand_zoneid == ALL_ZONES))
return (CAND_TIE);
else if (cc->cand_zoneid == ALL_ZONES)
return (CAND_AVOID);
else
return (CAND_PREFER);
}
/*
* Determine the best source address given a destination address and a
* destination ill. If no suitable source address is found, it returns
* NULL. If there is a usable address pointed to by the usesrc
* (i.e ill_usesrc_ifindex != 0) then return that first since it is more
* fine grained (i.e per interface)
*
* This implementation is based on the "Default Address Selection for IPv6"
* specification produced by the IETF IPv6 working group. It has been
* implemented so that the list of addresses is only traversed once (the
* specification's algorithm could traverse the list of addresses once for
* every rule).
*
* The restrict_ill argument restricts the algorithm to chose a source
* address that is assigned to the destination ill or an ill in the same
* IPMP group as the destination ill. This is used when the destination
* address is a link-local or multicast address, and when
* ipv6_strict_dst_multihoming is turned on.
*
* src_prefs is the caller's set of source address preferences. If source
* address selection is being called to determine the source address of a
* connected socket (from ip_bind_connected_v6()), then the preferences are
* taken from conn_src_preferences. These preferences can be set on a
* per-socket basis using the IPV6_SRC_PREFERENCES socket option. The only
* preference currently implemented is for rfc3041 temporary addresses.
*/
ipif_t *
ipif_select_source_v6(ill_t *dstill, const in6_addr_t *dst,
boolean_t restrict_ill, uint32_t src_prefs, zoneid_t zoneid)
{
dstinfo_t dstinfo;
char dstr[INET6_ADDRSTRLEN];
char sstr[INET6_ADDRSTRLEN];
ipif_t *ipif;
ill_t *ill, *usesrc_ill = NULL;
ill_walk_context_t ctx;
cand_t best_c; /* The best candidate */
cand_t curr_c; /* The current candidate */
uint_t index;
boolean_t first_candidate = B_TRUE;
rule_res_t rule_result;
phyint_t *phyi;
tsol_tpc_t *src_rhtp, *dst_rhtp;
/*
* The list of ordering rules. They are applied in the order they
* appear in the list.
*
* XXX rule_mipv6 will need to be implemented (the specification's
* rules 4) if a mobile IPv6 node is ever implemented.
*/
rulef_t rules[] = {
rule_isdst,
rule_scope,
rule_deprecated,
rule_preferred,
rule_interface,
rule_label,
rule_temporary,
rule_prefix,
rule_zone_specific,
NULL
};
ASSERT(dstill->ill_isv6);
ASSERT(!IN6_IS_ADDR_V4MAPPED(dst));
/*
* Check if there is a usable src address pointed to by the
* usesrc ifindex. This has higher precedence since it is
* finer grained (i.e per interface) v/s being system wide.
*/
if (dstill->ill_usesrc_ifindex != 0) {
if ((usesrc_ill =
ill_lookup_on_ifindex(dstill->ill_usesrc_ifindex, B_TRUE,
NULL, NULL, NULL, NULL)) != NULL) {
dstinfo.dst_ill = usesrc_ill;
} else {
return (NULL);
}
} else {
dstinfo.dst_ill = dstill;
}
/*
* If we're dealing with an unlabeled destination on a labeled system,
* make sure that we ignore source addresses that are incompatible with
* the destination's default label. That destination's default label
* must dominate the minimum label on the source address.
*
* (Note that this has to do with Trusted Solaris. It's not related to
* the labels described by ip6_asp_lookup.)
*/
dst_rhtp = NULL;
if (is_system_labeled()) {
dst_rhtp = find_tpc(dst, IPV6_VERSION, B_FALSE);
if (dst_rhtp == NULL)
return (NULL);
if (dst_rhtp->tpc_tp.host_type != UNLABELED) {
TPC_RELE(dst_rhtp);
dst_rhtp = NULL;
}
}
dstinfo.dst_addr = dst;
dstinfo.dst_scope = ip_addr_scope_v6(dst);
dstinfo.dst_label = ip6_asp_lookup(dst, NULL);
dstinfo.dst_prefer_src_tmp = ((src_prefs & IPV6_PREFER_SRC_TMP) != 0);
rw_enter(&ill_g_lock, RW_READER);
/*
* Section three of the I-D states that for multicast and
* link-local destinations, the candidate set must be restricted to
* an interface that is on the same link as the outgoing interface.
* Also, when ipv6_strict_dst_multihoming is turned on, always
* restrict the source address to the destination link as doing
* otherwise will almost certainly cause problems.
*/
if (IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst) ||
ipv6_strict_dst_multihoming || usesrc_ill != NULL)
dstinfo.dst_restrict_ill = B_TRUE;
else
dstinfo.dst_restrict_ill = restrict_ill;
bzero(&best_c, sizeof (cand_t));
/*
* Take a pass through the list of IPv6 interfaces to chose the
* best possible source address. If restrict_ill is true, we only
* iterate through the ill's that are in the same IPMP group as the
* destination's outgoing ill. If restrict_ill is false, we walk
* the entire list of IPv6 ill's.
*/
if (dstinfo.dst_restrict_ill) {
if (dstinfo.dst_ill->ill_group != NULL) {
/*
* Try to avoid FAILED/OFFLINE ills. Global and
* site local addresses will failover and are not
* an issue even if we select them. (i.e. this is
* a race where we hit this path before in.mpathd
* moves them. But link local addresses don't move.
* This creates a problem for NUD. If NUD ends up
* (nce_xmit) using the src addr from a failed
* interface NUD will fail and end up deleting the nce
* This will cause performance issues where ires
* are frequently created and deleted every few secs.
*/
for (ill = dstinfo.dst_ill->ill_group->illgrp_ill;
ill != NULL; ill = ill->ill_group_next) {
phyi = ill->ill_phyint;
if (!(phyi->phyint_flags &
(PHYI_OFFLINE | PHYI_FAILED)))
break;
}
if (ill == NULL)
ill = dstinfo.dst_ill->ill_group->illgrp_ill;
} else {
ill = dstinfo.dst_ill;
}
} else {
ill = ILL_START_WALK_V6(&ctx);
}
while (ill != NULL) {
ASSERT(ill->ill_isv6);
for (ipif = ill->ill_ipif; ipif != NULL;
ipif = ipif->ipif_next) {
if (!IPIF_VALID_IPV6_SOURCE(ipif))
continue;
if (zoneid != ALL_ZONES &&
ipif->ipif_zoneid != zoneid &&
ipif->ipif_zoneid != ALL_ZONES)
continue;
/*
* Check compatibility of local address for
* destination's default label if we're on a labeled
* system. Incompatible addresses can't be used at
* all and must be skipped over.
*/
if (dst_rhtp != NULL) {
boolean_t incompat;
src_rhtp = find_tpc(&ipif->ipif_v6lcl_addr,
IPV6_VERSION, B_FALSE);
if (src_rhtp == NULL)
continue;
incompat =
src_rhtp->tpc_tp.host_type != SUN_CIPSO ||
src_rhtp->tpc_tp.tp_doi !=
dst_rhtp->tpc_tp.tp_doi ||
(!_blinrange(&dst_rhtp->tpc_tp.tp_def_label,
&src_rhtp->tpc_tp.tp_sl_range_cipso) &&
!blinlset(&dst_rhtp->tpc_tp.tp_def_label,
src_rhtp->tpc_tp.tp_sl_set_cipso));
TPC_RELE(src_rhtp);
if (incompat)
continue;
}
if (first_candidate) {
/*
* This is first valid address in the list.
* It is automatically the best candidate
* so far.
*/
best_c.cand_ipif = ipif;
first_candidate = B_FALSE;
continue;
}
bzero(&curr_c, sizeof (cand_t));
curr_c.cand_ipif = ipif;
/*
* Compare this current candidate (curr_c) with the
* best candidate (best_c) by applying the
* comparison rules in order until one breaks the
* tie.
*/
for (index = 0; rules[index] != NULL; index++) {
/* Apply a comparison rule. */
rule_result =
(rules[index])(&best_c, &curr_c, &dstinfo);
if (rule_result == CAND_AVOID) {
/*
* The best candidate is still the
* best candidate. Forget about
* this current candidate and go on
* to the next one.
*/
break;
} else if (rule_result == CAND_PREFER) {
/*
* This candidate is prefered. It
* becomes the best candidate so
* far. Go on to the next address.
*/
best_c = curr_c;
break;
}
/* We have a tie, apply the next rule. */
}
/*
* The last rule must be a tie breaker rule and
* must never produce a tie. At this point, the
* candidate should have either been rejected, or
* have been prefered as the best candidate so far.
*/
ASSERT(rule_result != CAND_TIE);
}
/*
* We may be walking the linked-list of ill's in an
* IPMP group or traversing the IPv6 ill avl tree. If it is a
* usesrc ILL then it can't be part of IPMP group and we
* will exit the while loop.
*/
if (dstinfo.dst_restrict_ill)
ill = ill->ill_group_next;
else
ill = ill_next(&ctx, ill);
}
ipif = best_c.cand_ipif;
ip1dbg(("ipif_select_source_v6(%s, %s) -> %s\n",
dstinfo.dst_ill->ill_name,
inet_ntop(AF_INET6, dstinfo.dst_addr, dstr, sizeof (dstr)),
(ipif == NULL ? "NULL" :
inet_ntop(AF_INET6, &ipif->ipif_v6lcl_addr, sstr, sizeof (sstr)))));
if (usesrc_ill != NULL)
ill_refrele(usesrc_ill);
if (dst_rhtp != NULL)
TPC_RELE(dst_rhtp);
if (ipif == NULL) {
rw_exit(&ill_g_lock);
return (NULL);
}
mutex_enter(&ipif->ipif_ill->ill_lock);
if (IPIF_CAN_LOOKUP(ipif)) {
ipif_refhold_locked(ipif);
mutex_exit(&ipif->ipif_ill->ill_lock);
rw_exit(&ill_g_lock);
return (ipif);
}
mutex_exit(&ipif->ipif_ill->ill_lock);
rw_exit(&ill_g_lock);
ip1dbg(("ipif_select_source_v6 cannot lookup ipif %p"
" returning null \n", (void *)ipif));
return (NULL);
}
/*
* If old_ipif is not NULL, see if ipif was derived from old
* ipif and if so, recreate the interface route by re-doing
* source address selection. This happens when ipif_down ->
* ipif_update_other_ipifs calls us.
*
* If old_ipif is NULL, just redo the source address selection
* if needed. This happens when illgrp_insert or ipif_up_done_v6
* calls us.
*/
void
ipif_recreate_interface_routes_v6(ipif_t *old_ipif, ipif_t *ipif)
{
ire_t *ire;
ire_t *ipif_ire;
queue_t *stq;
ill_t *ill;
ipif_t *nipif = NULL;
boolean_t nipif_refheld = B_FALSE;
boolean_t ip6_asp_table_held = B_FALSE;
ill = ipif->ipif_ill;
if (!(ipif->ipif_flags &
(IPIF_NOLOCAL|IPIF_ANYCAST|IPIF_DEPRECATED))) {
/*
* Can't possibly have borrowed the source
* from old_ipif.
*/
return;
}
/*
* Is there any work to be done? No work if the address
* is INADDR_ANY, loopback or NOLOCAL or ANYCAST (
* ipif_select_source_v6() does not borrow addresses from
* NOLOCAL and ANYCAST interfaces).
*/
if ((old_ipif != NULL) &&
((IN6_IS_ADDR_UNSPECIFIED(&old_ipif->ipif_v6lcl_addr)) ||
(old_ipif->ipif_ill->ill_wq == NULL) ||
(old_ipif->ipif_flags &
(IPIF_NOLOCAL|IPIF_ANYCAST)))) {
return;
}
/*
* Perform the same checks as when creating the
* IRE_INTERFACE in ipif_up_done_v6.
*/
if (!(ipif->ipif_flags & IPIF_UP))
return;
if ((ipif->ipif_flags & IPIF_NOXMIT))
return;
if (IN6_IS_ADDR_UNSPECIFIED(&ipif->ipif_v6subnet) &&
IN6_IS_ADDR_UNSPECIFIED(&ipif->ipif_v6net_mask))
return;
/*
* We know that ipif uses some other source for its
* IRE_INTERFACE. Is it using the source of this
* old_ipif?
*/
ipif_ire = ipif_to_ire_v6(ipif);
if (ipif_ire == NULL)
return;
if (old_ipif != NULL &&
!IN6_ARE_ADDR_EQUAL(&old_ipif->ipif_v6lcl_addr,
&ipif_ire->ire_src_addr_v6)) {
ire_refrele(ipif_ire);
return;
}
if (ip_debug > 2) {
/* ip1dbg */
pr_addr_dbg("ipif_recreate_interface_routes_v6: deleting IRE"
" for src %s\n", AF_INET6, &ipif_ire->ire_src_addr_v6);
}
stq = ipif_ire->ire_stq;
/*
* Can't use our source address. Select a different source address
* for the IRE_INTERFACE. We restrict interface route source
* address selection to ipif's assigned to the same link as the
* interface.
*/
if (ip6_asp_can_lookup()) {
ip6_asp_table_held = B_TRUE;
nipif = ipif_select_source_v6(ill, &ipif->ipif_v6subnet,
B_TRUE, IPV6_PREFER_SRC_DEFAULT, ipif->ipif_zoneid);
}
if (nipif == NULL) {
/* Last resort - all ipif's have IPIF_NOLOCAL */
nipif = ipif;
} else {
nipif_refheld = B_TRUE;
}
ire = ire_create_v6(
&ipif->ipif_v6subnet, /* dest pref */
&ipif->ipif_v6net_mask, /* mask */
&nipif->ipif_v6src_addr, /* src addr */
NULL, /* no gateway */
&ipif->ipif_mtu, /* max frag */
NULL, /* no Fast path header */
NULL, /* no recv from queue */
stq, /* send-to queue */
ill->ill_net_type, /* IF_[NO]RESOLVER */
ill->ill_resolver_mp, /* xmit header */
ipif,
NULL,
0,
0,
0,
&ire_uinfo_null,
NULL,
NULL);
if (ire != NULL) {
ire_t *ret_ire;
int error;
/*
* We don't need ipif_ire anymore. We need to delete
* before we add so that ire_add does not detect
* duplicates.
*/
ire_delete(ipif_ire);
ret_ire = ire;
error = ire_add(&ret_ire, NULL, NULL, NULL);
ASSERT(error == 0);
ASSERT(ret_ire == ire);
if (ret_ire != NULL) {
/* Held in ire_add */
ire_refrele(ret_ire);
}
}
/*
* Either we are falling through from above or could not
* allocate a replacement.
*/
ire_refrele(ipif_ire);
if (ip6_asp_table_held)
ip6_asp_table_refrele();
if (nipif_refheld)
ipif_refrele(nipif);
}
/*
* This old_ipif is going away.
*
* Determine if any other ipif's are using our address as
* ipif_v6lcl_addr (due to those being IPIF_NOLOCAL, IPIF_ANYCAST, or
* IPIF_DEPRECATED).
* Find the IRE_INTERFACE for such ipif's and recreate them
* to use an different source address following the rules in
* ipif_up_done_v6.
*
* This function takes an illgrp as an argument so that illgrp_delete
* can call this to update source address even after deleting the
* old_ipif->ipif_ill from the ill group.
*/
void
ipif_update_other_ipifs_v6(ipif_t *old_ipif, ill_group_t *illgrp)
{
ipif_t *ipif;
ill_t *ill;
char buf[INET6_ADDRSTRLEN];
ASSERT(IAM_WRITER_IPIF(old_ipif));
ill = old_ipif->ipif_ill;
ip1dbg(("ipif_update_other_ipifs_v6(%s, %s)\n",
ill->ill_name,
inet_ntop(AF_INET6, &old_ipif->ipif_v6lcl_addr,
buf, sizeof (buf))));
/*
* If this part of a group, look at all ills as ipif_select_source
* borrows a source address across all the ills in the group.
*/
if (illgrp != NULL)
ill = illgrp->illgrp_ill;
/* Don't need a lock since this is a writer */
for (; ill != NULL; ill = ill->ill_group_next) {
for (ipif = ill->ill_ipif; ipif != NULL;
ipif = ipif->ipif_next) {
if (ipif == old_ipif)
continue;
ipif_recreate_interface_routes_v6(old_ipif, ipif);
}
}
}
/*
* Perform an attach and bind to get phys addr plus info_req for
* the physical device.
* q and mp represents an ioctl which will be queued waiting for
* completion of the DLPI message exchange.
* MUST be called on an ill queue. Can not set conn_pending_ill for that
* reason thus the DL_PHYS_ADDR_ACK code does not assume ill_pending_q.
*
* Returns EINPROGRESS when mp has been consumed by queueing it on
* ill_pending_mp and the ioctl will complete in ip_rput.
*/
int
ill_dl_phys(ill_t *ill, ipif_t *ipif, mblk_t *mp, queue_t *q)
{
mblk_t *v6token_mp = NULL;
mblk_t *v6lla_mp = NULL;
mblk_t *phys_mp = NULL;
mblk_t *info_mp = NULL;
mblk_t *attach_mp = NULL;
mblk_t *detach_mp = NULL;
mblk_t *bind_mp = NULL;
mblk_t *unbind_mp = NULL;
mblk_t *notify_mp = NULL;
ip1dbg(("ill_dl_phys(%s:%u)\n", ill->ill_name, ipif->ipif_id));
ASSERT(ill->ill_dlpi_style_set);
ASSERT(WR(q)->q_next != NULL);
if (ill->ill_isv6) {
v6token_mp = ip_dlpi_alloc(sizeof (dl_phys_addr_req_t) +
sizeof (t_scalar_t), DL_PHYS_ADDR_REQ);
if (v6token_mp == NULL)
goto bad;
((dl_phys_addr_req_t *)v6token_mp->b_rptr)->dl_addr_type =
DL_IPV6_TOKEN;
v6lla_mp = ip_dlpi_alloc(sizeof (dl_phys_addr_req_t) +
sizeof (t_scalar_t), DL_PHYS_ADDR_REQ);
if (v6lla_mp == NULL)
goto bad;
((dl_phys_addr_req_t *)v6lla_mp->b_rptr)->dl_addr_type =
DL_IPV6_LINK_LAYER_ADDR;
}
/*
* Allocate a DL_NOTIFY_REQ and set the notifications we want.
*/
notify_mp = ip_dlpi_alloc(sizeof (dl_notify_req_t) + sizeof (long),
DL_NOTIFY_REQ);
if (notify_mp == NULL)
goto bad;
((dl_notify_req_t *)notify_mp->b_rptr)->dl_notifications =
(DL_NOTE_PHYS_ADDR | DL_NOTE_SDU_SIZE | DL_NOTE_FASTPATH_FLUSH |
DL_NOTE_LINK_UP | DL_NOTE_LINK_DOWN | DL_NOTE_CAPAB_RENEG);
phys_mp = ip_dlpi_alloc(sizeof (dl_phys_addr_req_t) +
sizeof (t_scalar_t), DL_PHYS_ADDR_REQ);
if (phys_mp == NULL)
goto bad;
((dl_phys_addr_req_t *)phys_mp->b_rptr)->dl_addr_type =
DL_CURR_PHYS_ADDR;
info_mp = ip_dlpi_alloc(
sizeof (dl_info_req_t) + sizeof (dl_info_ack_t),
DL_INFO_REQ);
if (info_mp == NULL)
goto bad;
bind_mp = ip_dlpi_alloc(sizeof (dl_bind_req_t) + sizeof (long),
DL_BIND_REQ);
if (bind_mp == NULL)
goto bad;
((dl_bind_req_t *)bind_mp->b_rptr)->dl_sap = ill->ill_sap;
((dl_bind_req_t *)bind_mp->b_rptr)->dl_service_mode = DL_CLDLS;
unbind_mp = ip_dlpi_alloc(sizeof (dl_unbind_req_t), DL_UNBIND_REQ);
if (unbind_mp == NULL)
goto bad;
/* If we need to attach/detach, pre-alloc and initialize the mblks */
if (ill->ill_needs_attach) {
attach_mp = ip_dlpi_alloc(sizeof (dl_attach_req_t),
DL_ATTACH_REQ);
if (attach_mp == NULL)
goto bad;
((dl_attach_req_t *)attach_mp->b_rptr)->dl_ppa = ill->ill_ppa;
detach_mp = ip_dlpi_alloc(sizeof (dl_detach_req_t),
DL_DETACH_REQ);
if (detach_mp == NULL)
goto bad;
}
/*
* Here we are going to delay the ioctl ack until after
* ACKs from DL_PHYS_ADDR_REQ. So need to save the
* original ioctl message before sending the requests
*/
mutex_enter(&ill->ill_lock);
/* ipsq_pending_mp_add won't fail since we pass in a NULL connp */
(void) ipsq_pending_mp_add(NULL, ipif, ill->ill_wq, mp, 0);
/*
* Set ill_phys_addr_pend to zero. It will be set to the addr_type of
* the DL_PHYS_ADDR_REQ in ill_dlpi_send() and ill_dlpi_done(). It will
* be used to track which DL_PHYS_ADDR_REQ is being ACK'd/NAK'd.
*/
ill->ill_phys_addr_pend = 0;
mutex_exit(&ill->ill_lock);
if (attach_mp != NULL) {
ip1dbg(("ill_dl_phys: attach\n"));
ill_dlpi_send(ill, attach_mp);
}
ill_dlpi_send(ill, bind_mp);
ill_dlpi_send(ill, info_mp);
if (ill->ill_isv6) {
ill_dlpi_send(ill, v6token_mp);
ill_dlpi_send(ill, v6lla_mp);
}
ill_dlpi_send(ill, phys_mp);
ill_dlpi_send(ill, notify_mp);
ill_dlpi_send(ill, unbind_mp);
/*
* Save the DL_DETACH_REQ (if there is one) for use in ill_delete().
*/
ASSERT(ill->ill_detach_mp == NULL);
ill->ill_detach_mp = detach_mp;
/*
* This operation will complete in ip_rput_dlpi_writer with either
* a DL_PHYS_ADDR_ACK or DL_ERROR_ACK.
*/
return (EINPROGRESS);
bad:
if (v6token_mp != NULL)
freemsg(v6token_mp);
if (v6lla_mp != NULL)
freemsg(v6lla_mp);
if (phys_mp != NULL)
freemsg(phys_mp);
if (info_mp != NULL)
freemsg(info_mp);
if (attach_mp != NULL)
freemsg(attach_mp);
if (detach_mp != NULL)
freemsg(detach_mp);
if (bind_mp != NULL)
freemsg(bind_mp);
if (unbind_mp != NULL)
freemsg(unbind_mp);
if (notify_mp != NULL)
freemsg(notify_mp);
return (ENOMEM);
}
uint_t ip_loopback_mtu_v6plus = IP_LOOPBACK_MTU + IPV6_HDR_LEN + 20;
/*
* DLPI is up.
* Create all the IREs associated with an interface bring up multicast.
* Set the interface flag and finish other initialization
* that potentially had to be differed to after DL_BIND_ACK.
*/
int
ipif_up_done_v6(ipif_t *ipif)
{
ire_t *ire_array[20];
ire_t **irep = ire_array;
ire_t **irep1;
ill_t *ill = ipif->ipif_ill;
queue_t *stq;
in6_addr_t v6addr;
in6_addr_t route_mask;
ipif_t *src_ipif = NULL;
ipif_t *tmp_ipif;
boolean_t flush_ire_cache = B_TRUE;
int err;
char buf[INET6_ADDRSTRLEN];
phyint_t *phyi;
ire_t **ipif_saved_irep = NULL;
int ipif_saved_ire_cnt;
int cnt;
boolean_t src_ipif_held = B_FALSE;
boolean_t ire_added = B_FALSE;
boolean_t loopback = B_FALSE;
boolean_t ip6_asp_table_held = B_FALSE;
ip1dbg(("ipif_up_done_v6(%s:%u)\n",
ipif->ipif_ill->ill_name, ipif->ipif_id));
/* Check if this is a loopback interface */
if (ipif->ipif_ill->ill_wq == NULL)
loopback = B_TRUE;
ASSERT(ipif->ipif_isv6);
ASSERT(!MUTEX_HELD(&ipif->ipif_ill->ill_lock));
/*
* If all other interfaces for this ill are down or DEPRECATED,
* or otherwise unsuitable for source address selection, remove
* any IRE_CACHE entries for this ill to make sure source
* address selection gets to take this new ipif into account.
* No need to hold ill_lock while traversing the ipif list since
* we are writer
*/
for (tmp_ipif = ill->ill_ipif; tmp_ipif;
tmp_ipif = tmp_ipif->ipif_next) {
if (((tmp_ipif->ipif_flags &
(IPIF_NOXMIT|IPIF_ANYCAST|IPIF_NOLOCAL|IPIF_DEPRECATED)) ||
!(tmp_ipif->ipif_flags & IPIF_UP)) ||
(tmp_ipif == ipif))
continue;
/* first useable pre-existing interface */
flush_ire_cache = B_FALSE;
break;
}
if (flush_ire_cache)
ire_walk_ill_v6(MATCH_IRE_ILL_GROUP | MATCH_IRE_TYPE,
IRE_CACHE, ill_ipif_cache_delete, (char *)ill, ill);
/*
* Figure out which way the send-to queue should go. Only
* IRE_IF_RESOLVER or IRE_IF_NORESOLVER should show up here.
*/
switch (ill->ill_net_type) {
case IRE_IF_RESOLVER:
stq = ill->ill_rq;
break;
case IRE_IF_NORESOLVER:
case IRE_LOOPBACK:
stq = ill->ill_wq;
break;
default:
return (EINVAL);
}
if (ill->ill_phyint->phyint_flags & PHYI_LOOPBACK) {
/*
* lo0:1 and subsequent ipifs were marked IRE_LOCAL in
* ipif_lookup_on_name(), but in the case of zones we can have
* several loopback addresses on lo0. So all the interfaces with
* loopback addresses need to be marked IRE_LOOPBACK.
*/
if (IN6_ARE_ADDR_EQUAL(&ipif->ipif_v6lcl_addr, &ipv6_loopback))
ipif->ipif_ire_type = IRE_LOOPBACK;
else
ipif->ipif_ire_type = IRE_LOCAL;
}
if (ipif->ipif_flags & (IPIF_NOLOCAL|IPIF_ANYCAST|IPIF_DEPRECATED)) {
/*
* Can't use our source address. Select a different
* source address for the IRE_INTERFACE and IRE_LOCAL
*/
if (ip6_asp_can_lookup()) {
ip6_asp_table_held = B_TRUE;
src_ipif = ipif_select_source_v6(ipif->ipif_ill,
&ipif->ipif_v6subnet, B_FALSE,
IPV6_PREFER_SRC_DEFAULT, ipif->ipif_zoneid);
}
if (src_ipif == NULL)
src_ipif = ipif; /* Last resort */
else
src_ipif_held = B_TRUE;
} else {
src_ipif = ipif;
}
if (!IN6_IS_ADDR_UNSPECIFIED(&ipif->ipif_v6lcl_addr) &&
!(ipif->ipif_flags & IPIF_NOLOCAL)) {
/*
* If we're on a labeled system then make sure that zone-
* private addresses have proper remote host database entries.
*/
if (is_system_labeled() &&
ipif->ipif_ire_type != IRE_LOOPBACK) {
if (ip6opt_ls == 0) {
cmn_err(CE_WARN, "IPv6 not enabled "
"via /etc/system");
return (EINVAL);
}
if (!tsol_check_interface_address(ipif))
return (EINVAL);
}
/* Register the source address for __sin6_src_id */
err = ip_srcid_insert(&ipif->ipif_v6lcl_addr,
ipif->ipif_zoneid);
if (err != 0) {
ip0dbg(("ipif_up_done_v6: srcid_insert %d\n", err));
if (src_ipif_held)
ipif_refrele(src_ipif);
if (ip6_asp_table_held)
ip6_asp_table_refrele();
return (err);
}
/*
* If the interface address is set, create the LOCAL
* or LOOPBACK IRE.
*/
ip1dbg(("ipif_up_done_v6: creating IRE %d for %s\n",
ipif->ipif_ire_type,
inet_ntop(AF_INET6, &ipif->ipif_v6lcl_addr,
buf, sizeof (buf))));
*irep++ = ire_create_v6(
&ipif->ipif_v6lcl_addr, /* dest address */
&ipv6_all_ones, /* mask */
&src_ipif->ipif_v6src_addr, /* source address */
NULL, /* no gateway */
&ip_loopback_mtu_v6plus, /* max frag size */
NULL,
ipif->ipif_rq, /* recv-from queue */
NULL, /* no send-to queue */
ipif->ipif_ire_type, /* LOCAL or LOOPBACK */
NULL,
ipif, /* interface */
NULL,
0,
0,
(ipif->ipif_flags & IPIF_PRIVATE) ? RTF_PRIVATE : 0,
&ire_uinfo_null,
NULL,
NULL);
}
/*
* Set up the IRE_IF_RESOLVER or IRE_IF_NORESOLVER, as appropriate.
* Note that atun interfaces have an all-zero ipif_v6subnet.
* Thus we allow a zero subnet as long as the mask is non-zero.
*/
if (stq != NULL && !(ipif->ipif_flags & IPIF_NOXMIT) &&
!(IN6_IS_ADDR_UNSPECIFIED(&ipif->ipif_v6subnet) &&
IN6_IS_ADDR_UNSPECIFIED(&ipif->ipif_v6net_mask))) {
/* ipif_v6subnet is ipif_v6pp_dst_addr for pt-pt */
v6addr = ipif->ipif_v6subnet;
if (ipif->ipif_flags & IPIF_POINTOPOINT) {
route_mask = ipv6_all_ones;
} else {
route_mask = ipif->ipif_v6net_mask;
}
ip1dbg(("ipif_up_done_v6: creating if IRE %d for %s\n",
ill->ill_net_type,
inet_ntop(AF_INET6, &v6addr, buf, sizeof (buf))));
*irep++ = ire_create_v6(
&v6addr, /* dest pref */
&route_mask, /* mask */
&src_ipif->ipif_v6src_addr, /* src addr */
NULL, /* no gateway */
&ipif->ipif_mtu, /* max frag */
NULL, /* no Fast path header */
NULL, /* no recv from queue */
stq, /* send-to queue */
ill->ill_net_type, /* IF_[NO]RESOLVER */
ill->ill_resolver_mp, /* xmit header */
ipif,
NULL,
0,
0,
(ipif->ipif_flags & IPIF_PRIVATE) ? RTF_PRIVATE : 0,
&ire_uinfo_null,
NULL,
NULL);
}
/*
* Setup 2002::/16 route, if this interface is a 6to4 tunnel
*/
if (IN6_IS_ADDR_6TO4(&ipif->ipif_v6lcl_addr) &&
(ill->ill_is_6to4tun)) {
/*
* Destination address is 2002::/16
*/
#ifdef _BIG_ENDIAN
const in6_addr_t prefix_addr = { 0x20020000U, 0, 0, 0 };
const in6_addr_t prefix_mask = { 0xffff0000U, 0, 0, 0 };
#else
const in6_addr_t prefix_addr = { 0x00000220U, 0, 0, 0 };
const in6_addr_t prefix_mask = { 0x0000ffffU, 0, 0, 0 };
#endif /* _BIG_ENDIAN */
char buf2[INET6_ADDRSTRLEN];
ire_t *isdup;
in6_addr_t *first_addr = &ill->ill_ipif->ipif_v6lcl_addr;
/*
* check to see if this route has already been added for
* this tunnel interface.
*/
isdup = ire_ftable_lookup_v6(first_addr, &prefix_mask, 0,
IRE_IF_NORESOLVER, ill->ill_ipif, NULL, ALL_ZONES, 0, NULL,
(MATCH_IRE_SRC | MATCH_IRE_MASK));
if (isdup == NULL) {
ip1dbg(("ipif_up_done_v6: creating if IRE %d for %s",
IRE_IF_NORESOLVER, inet_ntop(AF_INET6, &v6addr,
buf2, sizeof (buf2))));
*irep++ = ire_create_v6(
&prefix_addr, /* 2002:: */
&prefix_mask, /* ffff:: */
&ipif->ipif_v6lcl_addr, /* src addr */
NULL, /* gateway */
&ipif->ipif_mtu, /* max_frag */
NULL, /* no Fast Path hdr */
NULL, /* no rfq */
ill->ill_wq, /* stq */
IRE_IF_NORESOLVER, /* type */
ill->ill_resolver_mp, /* dlureq_mp */
ipif, /* interface */
NULL, /* v6cmask */
0,
0,
RTF_UP,
&ire_uinfo_null,
NULL,
NULL);
} else {
ire_refrele(isdup);
}
}
/* If an earlier ire_create failed, get out now */
for (irep1 = irep; irep1 > ire_array; ) {
irep1--;
if (*irep1 == NULL) {
ip1dbg(("ipif_up_done_v6: NULL ire found in"
" ire_array\n"));
err = ENOMEM;
goto bad;
}
}
ASSERT(!MUTEX_HELD(&ipif->ipif_ill->ill_lock));
/*
* Need to atomically check for ip_addr_availablity_check
* now under ill_g_lock, and if it fails got bad, and remove
* from group also
*/
rw_enter(&ill_g_lock, RW_READER);
mutex_enter(&ip_addr_avail_lock);
ill->ill_ipif_up_count++;
ipif->ipif_flags |= IPIF_UP;
err = ip_addr_availability_check(ipif);
mutex_exit(&ip_addr_avail_lock);
rw_exit(&ill_g_lock);
if (err != 0) {
/*
* Our address may already be up on the same ill. In this case,
* the external resolver entry for our ipif replaced the one for
* the other ipif. So we don't want to delete it (otherwise the
* other ipif would be unable to send packets).
* ip_addr_availability_check() identifies this case for us and
* returns EADDRINUSE; we need to turn it into EADDRNOTAVAIL
* which is the expected error code.
*/
if (err == EADDRINUSE) {
if (ipif->ipif_ill->ill_flags & ILLF_XRESOLV) {
freemsg(ipif->ipif_arp_del_mp);
ipif->ipif_arp_del_mp = NULL;
}
err = EADDRNOTAVAIL;
}
ill->ill_ipif_up_count--;
ipif->ipif_flags &= ~IPIF_UP;
goto bad;
}
/*
* Add in all newly created IREs. We want to add before
* we call ifgrp_insert which wants to know whether
* IRE_IF_RESOLVER exists or not.
*
* NOTE : We refrele the ire though we may branch to "bad"
* later on where we do ire_delete. This is okay
* because nobody can delete it as we are running
* exclusively.
*/
for (irep1 = irep; irep1 > ire_array; ) {
irep1--;
/* Shouldn't be adding any bcast ire's */
ASSERT((*irep1)->ire_type != IRE_BROADCAST);
ASSERT(!MUTE