/* Interface's address information get. */
int
ifam_read (struct ifa_msghdr *ifam)
{
struct interface *ifp;
union sockunion addr, mask, gate;
/* Check does this interface exist or not. */
ifp = if_lookup_by_index (ifam->ifam_index);
if (ifp == NULL)
{
zlog_warn ("no interface for index %d", ifam->ifam_index);
return -1;
}
/* Allocate and read address information. */
ifam_read_mesg (ifam, &addr, &mask, &gate);
/* Check interface flag for implicit up of the interface. */
if_refresh (ifp);
/* Add connected address. */
switch (sockunion_family (&addr))
{
case AF_INET:
if (ifam->ifam_type == RTM_NEWADDR)
connected_add_ipv4 (ifp, 0, &addr.sin.sin_addr,
ip_masklen (mask.sin.sin_addr),
&gate.sin.sin_addr, NULL);
else
connected_delete_ipv4 (ifp, 0, &addr.sin.sin_addr,
ip_masklen (mask.sin.sin_addr),
&gate.sin.sin_addr, NULL);
break;
#ifdef HAVE_IPV6
case AF_INET6:
/* Unset interface index from link-local address when IPv6 stack
is KAME. */
if (IN6_IS_ADDR_LINKLOCAL (&addr.sin6.sin6_addr))
SET_IN6_LINKLOCAL_IFINDEX (addr.sin6.sin6_addr, 0);
if (ifam->ifam_type == RTM_NEWADDR)
connected_add_ipv6 (ifp,
&addr.sin6.sin6_addr,
ip6_masklen (mask.sin6.sin6_addr),
&gate.sin6.sin6_addr);
else
connected_delete_ipv6 (ifp,
&addr.sin6.sin6_addr,
ip6_masklen (mask.sin6.sin6_addr),
&gate.sin6.sin6_addr);
break;
#endif /* HAVE_IPV6 */
default:
/* Unsupported family silently ignore... */
break;
}
return 0;
}
/* Interface's address information get. */
int
ifam_read (struct ifa_msghdr *ifam)
{
struct interface *ifp = NULL;
union sockunion addr, mask, brd;
char ifname[INTERFACE_NAMSIZ];
short ifnlen = 0;
char isalias = 0;
int flags = 0;
ifname[0] = ifname[INTERFACE_NAMSIZ - 1] = '\0';
/* Allocate and read address information. */
ifam_read_mesg (ifam, &addr, &mask, &brd, ifname, &ifnlen);
if ((ifp = if_lookup_by_index(ifam->ifam_index)) == NULL)
{
zlog_warn ("%s: no interface for ifname %s, index %d",
__func__, ifname, ifam->ifam_index);
return -1;
}
if (ifnlen && strncmp (ifp->name, ifname, INTERFACE_NAMSIZ))
isalias = 1;
/* N.B. The info in ifa_msghdr does not tell us whether the RTA_BRD
field contains a broadcast address or a peer address, so we are forced to
rely upon the interface type. */
if (if_is_pointopoint(ifp))
SET_FLAG(flags, ZEBRA_IFA_PEER);
#if 0
/* it might seem cute to grab the interface metric here, however
* we're processing an address update message, and so some systems
* (e.g. FBSD) dont bother to fill in ifam_metric. Disabled, but left
* in deliberately, as comment.
*/
ifp->metric = ifam->ifam_metric;
#endif
/* Add connected address. */
switch (sockunion_family (&addr))
{
case AF_INET:
if (ifam->ifam_type == RTM_NEWADDR)
connected_add_ipv4 (ifp, flags, &addr.sin.sin_addr,
ip_masklen (mask.sin.sin_addr),
&brd.sin.sin_addr,
(isalias ? ifname : NULL));
else
connected_delete_ipv4 (ifp, flags, &addr.sin.sin_addr,
ip_masklen (mask.sin.sin_addr),
&brd.sin.sin_addr);
break;
#ifdef HAVE_IPV6
case AF_INET6:
/* Unset interface index from link-local address when IPv6 stack
is KAME. */
if (IN6_IS_ADDR_LINKLOCAL (&addr.sin6.sin6_addr))
SET_IN6_LINKLOCAL_IFINDEX (addr.sin6.sin6_addr, 0);
if (ifam->ifam_type == RTM_NEWADDR)
connected_add_ipv6 (ifp, flags, &addr.sin6.sin6_addr,
ip6_masklen (mask.sin6.sin6_addr),
&brd.sin6.sin6_addr,
(isalias ? ifname : NULL));
else
connected_delete_ipv6 (ifp,
&addr.sin6.sin6_addr,
ip6_masklen (mask.sin6.sin6_addr),
&brd.sin6.sin6_addr);
break;
#endif /* HAVE_IPV6 */
default:
/* Unsupported family silently ignore... */
break;
}
/* Check interface flag for implicit up of the interface. */
if_refresh (ifp);
#ifdef SUNOS_5
/* In addition to lacking IFANNOUNCE, on SUNOS IFF_UP is strange.
* See comments for SUNOS_5 in interface.c::if_flags_mangle.
*
* Here we take care of case where the real IFF_UP was previously
* unset (as kept in struct zebra_if.primary_state) and the mangled
* IFF_UP (ie IFF_UP set || listcount(connected) has now transitioned
* to unset due to the lost non-primary address having DELADDR'd.
*
* we must delete the interface, because in between here and next
* event for this interface-name the administrator could unplumb
* and replumb the interface.
*/
if (!if_is_up (ifp))
if_delete_update (ifp);
#endif /* SUNOS_5 */
return 0;
}
/* Wake up configured address if it is not in current kernel
address. */
static void
if_addr_wakeup (struct interface *ifp)
{
struct listnode *node, *nnode;
struct connected *ifc;
struct prefix *p;
int ret;
for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, ifc))
{
p = ifc->address;
if (CHECK_FLAG (ifc->conf, ZEBRA_IFC_CONFIGURED)
&& ! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
{
/* Address check. */
if (p->family == AF_INET)
{
if (! if_is_up (ifp))
{
/* XXX: WTF is it trying to set flags here?
* caller has just gotten a new interface, has been
* handed the flags already. This code has no business
* trying to override administrative status of the interface.
* The only call path to here which doesn't originate from
* kernel event is irdp - what on earth is it trying to do?
*
* further RUNNING is not a settable flag on any system
* I (paulj) am aware of.
*/
if_set_flags (ifp, IFF_UP | IFF_RUNNING);
if_refresh (ifp);
}
ret = if_set_prefix (ifp, ifc);
if (ret < 0)
{
zlog_warn ("Can't set interface's address: %s",
safe_strerror(errno));
continue;
}
/* Add to subnet chain list. */
if_subnet_add (ifp, ifc);
SET_FLAG (ifc->conf, ZEBRA_IFC_REAL);
zebra_interface_address_add_update (ifp, ifc);
if (if_is_operative(ifp))
connected_up_ipv4 (ifp, ifc);
}
#ifdef HAVE_IPV6
if (p->family == AF_INET6)
{
if (! if_is_up (ifp))
{
/* XXX: See long comment above */
if_set_flags (ifp, IFF_UP | IFF_RUNNING);
if_refresh (ifp);
}
ret = if_prefix_add_ipv6 (ifp, ifc);
if (ret < 0)
{
zlog_warn ("Can't set interface's address: %s",
safe_strerror(errno));
continue;
}
SET_FLAG (ifc->conf, ZEBRA_IFC_REAL);
zebra_interface_address_add_update (ifp, ifc);
if (if_is_operative(ifp))
connected_up_ipv6 (ifp, ifc);
}
#endif /* HAVE_IPV6 */
}
}
}
/* Wake up configured address if it is not in current kernel
address. */
void
if_addr_wakeup (struct interface *ifp)
{
struct listnode *node;
struct connected *ifc;
struct prefix *p;
int ret;
for (node = listhead (ifp->connected); node; nextnode (node))
{
ifc = getdata (node);
p = ifc->address;
if (CHECK_FLAG (ifc->conf, ZEBRA_IFC_CONFIGURED)
&& ! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
{
/* Address check. */
if (p->family == AF_INET)
{
if (! if_is_up (ifp))
{
if_set_flags (ifp, IFF_UP | IFF_RUNNING);
if_refresh (ifp);
}
ret = if_set_prefix (ifp, ifc);
if (ret < 0)
{
zlog_warn ("Can't set interface's address: %s",
strerror(errno));
continue;
}
SET_FLAG (ifc->conf, ZEBRA_IFC_REAL);
zebra_interface_address_add_update (ifp, ifc);
if (if_is_up(ifp))
connected_up_ipv4 (ifp, ifc);
}
#ifdef HAVE_IPV6
if (p->family == AF_INET6)
{
if (! if_is_up (ifp))
{
if_set_flags (ifp, IFF_UP | IFF_RUNNING);
if_refresh (ifp);
}
ret = if_prefix_add_ipv6 (ifp, ifc);
if (ret < 0)
{
zlog_warn ("Can't set interface's address: %s",
strerror(errno));
continue;
}
SET_FLAG (ifc->conf, ZEBRA_IFC_REAL);
zebra_interface_address_add_update (ifp, ifc);
if (if_is_up(ifp))
connected_up_ipv6 (ifp, ifc);
}
#endif /* HAVE_IPV6 */
}
}
}
/* Wake up configured address if it is not in current kernel
address. */
static void
if_addr_wakeup (struct interface *ifp)
{
struct listnode *node, *nnode;
struct connected *ifc;
struct prefix *p;
int ret;
for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, ifc))
{
p = ifc->address;
if (CHECK_FLAG (ifc->conf, ZEBRA_IFC_CONFIGURED)
&& ! CHECK_FLAG (ifc->conf, ZEBRA_IFC_QUEUED))
{
/* Address check. */
if (p->family == AF_INET)
{
if (! if_is_up (ifp))
{
/* Assume zebra is configured like following:
*
* interface gre0
* ip addr 192.0.2.1/24
* !
*
* As soon as zebra becomes first aware that gre0 exists in the
* kernel, it will set gre0 up and configure its addresses.
*
* (This may happen at startup when the interface already exists
* or during runtime when the interface is added to the kernel)
*
* XXX: IRDP code is calling here via if_add_update - this seems
* somewhat weird.
* XXX: RUNNING is not a settable flag on any system
* I (paulj) am aware of.
*/
if_set_flags (ifp, IFF_UP | IFF_RUNNING);
if_refresh (ifp);
}
ret = if_set_prefix (ifp, ifc);
if (ret < 0)
{
zlog_warn ("Can't set interface's address: %s",
safe_strerror(errno));
continue;
}
SET_FLAG (ifc->conf, ZEBRA_IFC_QUEUED);
/* The address will be advertised to zebra clients when the notification
* from the kernel has been received.
* It will also be added to the interface's subnet list then. */
}
#ifdef HAVE_IPV6
if (p->family == AF_INET6)
{
if (! if_is_up (ifp))
{
/* See long comment above */
if_set_flags (ifp, IFF_UP | IFF_RUNNING);
if_refresh (ifp);
}
ret = if_prefix_add_ipv6 (ifp, ifc);
if (ret < 0)
{
zlog_warn ("Can't set interface's address: %s",
safe_strerror(errno));
continue;
}
SET_FLAG (ifc->conf, ZEBRA_IFC_QUEUED);
/* The address will be advertised to zebra clients when the notification
* from the kernel has been received. */
}
#endif /* HAVE_IPV6 */
}
}
}