/* Router-id is updated. Send ZEBRA_ROUTER_ID_ADD to client. */
int
zsend_router_id_update (struct zserv *client, struct prefix *p)
{
struct stream *s;
int blen;
/* Check this client need interface information. */
if (!client->ridinfo)
return -1;
s = client->obuf;
stream_reset (s);
/* Place holder for size. */
stream_putw (s, 0);
/* Message type. */
stream_putc (s, ZEBRA_ROUTER_ID_UPDATE);
/* Prefix information. */
stream_putc (s, p->family);
blen = prefix_blen (p);
stream_put (s, &p->u.prefix, blen);
stream_putc (s, p->prefixlen);
/* Write packet size. */
stream_putw_at (s, 0, stream_get_endp (s));
return writen (client->sock, s->data, stream_get_endp (s));
}
/* Router-id is updated. Send ZEBRA_ROUTER_ID_ADD to client. */
int
zsend_router_id_update (struct zserv *client, struct prefix *p)
{
struct stream *s;
int blen;
/* Check this client need interface information. */
if (!client->ridinfo)
return 0;
s = client->obuf;
stream_reset (s);
/* Message type. */
zserv_create_header (s, ZEBRA_ROUTER_ID_UPDATE);
/* Prefix information. */
stream_putc (s, p->family);
blen = prefix_blen (p);
stream_put (s, &p->u.prefix, blen);
stream_putc (s, p->prefixlen);
/* Write packet size. */
stream_putw_at (s, 0, stream_get_endp (s));
return zebra_server_send_message(client);
}
struct connected *
zebra_interface_address_read (int type, struct stream *s)
{
unsigned int ifindex;
struct interface *ifp;
struct connected *ifc;
struct prefix p, d;
int family;
int plen;
u_char ifc_flags;
memset (&p, 0, sizeof(p));
memset (&d, 0, sizeof(d));
/* Get interface index. */
ifindex = stream_getl (s);
/* Lookup index. */
ifp = if_lookup_by_index (ifindex);
if (ifp == NULL)
{
zlog_warn ("zebra_interface_address_read(%s): "
"Can't find interface by ifindex: %d ",
(type == ZEBRA_INTERFACE_ADDRESS_ADD? "ADD" : "DELETE"),
ifindex);
return NULL;
}
/* Fetch flag. */
ifc_flags = stream_getc (s);
/* Fetch interface address. */
family = p.family = stream_getc (s);
plen = prefix_blen (&p);
stream_get (&p.u.prefix, s, plen);
p.prefixlen = stream_getc (s);
/* Fetch destination address. */
stream_get (&d.u.prefix, s, plen);
d.family = family;
if (type == ZEBRA_INTERFACE_ADDRESS_ADD)
{
/* N.B. NULL destination pointers are encoded as all zeroes */
ifc = connected_add_by_prefix(ifp, &p,(memconstant(&d.u.prefix,0,plen) ?
NULL : &d));
if (ifc != NULL)
ifc->flags = ifc_flags;
}
else
{
assert (type == ZEBRA_INTERFACE_ADDRESS_DELETE);
ifc = connected_delete_by_prefix(ifp, &p);
}
return ifc;
}
/* Router-id update from zebra daemon. */
void
zebra_router_id_update_read (struct stream *s, struct prefix *rid)
{
int plen;
/* Fetch interface address. */
rid->family = stream_getc (s);
plen = prefix_blen (rid);
stream_get (&rid->u.prefix, s, plen);
rid->prefixlen = stream_getc (s);
}
/* Interface address is added/deleted. Send ZEBRA_INTERFACE_ADDRESS_ADD or
* ZEBRA_INTERFACE_ADDRESS_DELETE to the client.
*
* A ZEBRA_INTERFACE_ADDRESS_ADD is sent in the following situations:
* - in response to a 3-byte ZEBRA_INTERFACE_ADD request
* from the client, after the ZEBRA_INTERFACE_ADD has been
* sent from zebra to the client
* - redistribute new address info to all clients in the following situations
* - at startup, when zebra figures out the available interfaces
* - when an interface is added (where support for
* RTM_IFANNOUNCE or AF_NETLINK sockets is available), or when
* an interface is marked IFF_UP (i.e., an RTM_IFINFO message is
* received)
* - for the vty commands "ip address A.B.C.D/M [<secondary>|<label LINE>]"
* and "no bandwidth <1-10000000>", "ipv6 address X:X::X:X/M"
* - when an RTM_NEWADDR message is received from the kernel,
*
* The call tree that triggers ZEBRA_INTERFACE_ADDRESS_DELETE:
*
* zsend_interface_address(DELETE)
* ^
* |
* zebra_interface_address_delete_update
* ^ ^ ^
* | | if_delete_update (not called on
* | | Solaris)
* ip_address_uninstall connected_delete_ipv4
* [ipv6_addresss_uninstall] [connected_delete_ipv6]
* ^ ^
* | |
* | RTM_NEWADDR on routing/netlink socket
* |
* vty commands:
* "no ip address A.B.C.D/M [label LINE]"
* "no ip address A.B.C.D/M secondary"
* ["no ipv6 address X:X::X:X/M"]
*
*/
int
zsend_interface_address (int cmd, struct zserv *client,
struct interface *ifp, struct connected *ifc)
{
int blen;
struct stream *s;
struct prefix *p;
/* Check this client need interface information. */
if (! client->ifinfo)
return -1;
s = client->obuf;
stream_reset (s);
/* Place holder for size. */
stream_putw (s, 0);
stream_putc (s, cmd);
stream_putl (s, ifp->ifindex);
/* Interface address flag. */
stream_putc (s, ifc->flags);
/* Prefix information. */
p = ifc->address;
stream_putc (s, p->family);
blen = prefix_blen (p);
stream_put (s, &p->u.prefix, blen);
/*
* XXX gnu version does not send prefixlen for ZEBRA_INTERFACE_ADDRESS_DELETE
* but zebra_interface_address_delete_read() in the gnu version
* expects to find it
*/
stream_putc (s, p->prefixlen);
/* Destination. */
p = ifc->destination;
if (p)
stream_put (s, &p->u.prefix, blen);
else
stream_put (s, NULL, blen);
/* Write packet size. */
stream_putw_at (s, 0, stream_get_endp (s));
zebra_server_send_message (client->sock, s->data, stream_get_endp (s));
return 0;
}
/* Get prefix in ZServ format; family should be filled in on prefix */
static void
zclient_stream_get_prefix (struct stream *s, struct prefix *p)
{
size_t plen = prefix_blen (p);
u_char c;
p->prefixlen = 0;
if (plen == 0)
return;
stream_get (&p->u.prefix, s, plen);
c = stream_getc(s);
p->prefixlen = MIN(plen * 8, c);
}
struct connected *
zebra_interface_address_read (int type, struct stream *s)
{
unsigned int ifindex;
struct interface *ifp;
struct connected *ifc;
struct prefix p, d;
int family;
int plen;
u_char ifc_flags;
memset (&p, 0, sizeof(p));
memset (&d, 0, sizeof(d));
/* Get interface index. */
ifindex = stream_getl (s);
/* Lookup index. */
ifp = if_lookup_by_index (ifindex);
if (ifp == NULL)
{
zlog_warn ("zebra_interface_address_read(%s): "
"Can't find interface by ifindex: %d ",
(type == ZEBRA_INTERFACE_ADDRESS_ADD? "ADD" : "DELETE"),
ifindex);
return NULL;
}
/* Fetch flag. */
ifc_flags = stream_getc (s);
/* Fetch interface address. */
family = p.family = stream_getc (s);
plen = prefix_blen (&p);
stream_get (&p.u.prefix, s, plen);
p.prefixlen = stream_getc (s);
/* Fetch destination address. */
stream_get (&d.u.prefix, s, plen);
d.family = family;
if (type == ZEBRA_INTERFACE_ADDRESS_ADD)
{
/* N.B. NULL destination pointers are encoded as all zeroes */
ifc = connected_add_by_prefix(ifp, &p,(memconstant(&d.u.prefix,0,plen) ?
NULL : &d));
if (ifc != NULL)
{
ifc->flags = ifc_flags;
if (ifc->destination)
ifc->destination->prefixlen = ifc->address->prefixlen;
else if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_PEER))
{
/* carp interfaces on OpenBSD with 0.0.0.0/0 as "peer" */
char buf[BUFSIZ];
prefix2str (ifc->address, buf, sizeof(buf));
zlog_warn("warning: interface %s address %s "
"with peer flag set, but no peer address!",
ifp->name, buf);
UNSET_FLAG(ifc->flags, ZEBRA_IFA_PEER);
}
}
}
else
{
assert (type == ZEBRA_INTERFACE_ADDRESS_DELETE);
ifc = connected_delete_by_prefix(ifp, &p);
}
return ifc;
}
static void nhrp_interface_update_address(struct interface *ifp, afi_t afi, int force)
{
const int family = afi2family(afi);
struct nhrp_interface *nifp = ifp->info;
struct nhrp_afi_data *if_ad = &nifp->afi[afi];
struct nhrp_cache *nc;
struct connected *c, *best;
struct listnode *cnode;
union sockunion addr;
char buf[PREFIX_STRLEN];
/* Select new best match preferring primary address */
best = NULL;
for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, c)) {
if (PREFIX_FAMILY(c->address) != family)
continue;
if (best == NULL) {
best = c;
continue;
}
if ((best->flags & ZEBRA_IFA_SECONDARY) && !(c->flags & ZEBRA_IFA_SECONDARY)) {
best = c;
continue;
}
if (!(best->flags & ZEBRA_IFA_SECONDARY) && (c->flags & ZEBRA_IFA_SECONDARY))
continue;
if (best->address->prefixlen > c->address->prefixlen) {
best = c;
continue;
}
if (best->address->prefixlen < c->address->prefixlen)
continue;
}
/* On NHRP interfaces a host prefix is required */
if (best && if_ad->configured && best->address->prefixlen != 8 * prefix_blen(best->address)) {
zlog_notice("%s: %s is not a host prefix", ifp->name,
prefix2str(best->address, buf, sizeof buf));
best = NULL;
}
/* Update address if it changed */
if (best)
prefix2sockunion(best->address, &addr);
else
memset(&addr, 0, sizeof(addr));
if (!force && sockunion_same(&if_ad->addr, &addr))
return;
if (sockunion_family(&if_ad->addr) != AF_UNSPEC) {
nc = nhrp_cache_get(ifp, &if_ad->addr, 0);
if (nc) nhrp_cache_update_binding(nc, NHRP_CACHE_LOCAL, -1, NULL, 0, NULL);
}
debugf(NHRP_DEBUG_KERNEL, "%s: IPv%d address changed to %s",
ifp->name, afi == AFI_IP ? 4 : 6,
best ? prefix2str(best->address, buf, sizeof buf) : "(none)");
if_ad->addr = addr;
if (if_ad->configured && sockunion_family(&if_ad->addr) != AF_UNSPEC) {
nc = nhrp_cache_get(ifp, &addr, 1);
if (nc) nhrp_cache_update_binding(nc, NHRP_CACHE_LOCAL, 0, NULL, 0, NULL);
}
notifier_call(&nifp->notifier_list, NOTIFY_INTERFACE_ADDRESS_CHANGED);
}
