Initial revision

1 files changed, 592 insertions, 0 deletions

diff --git a/isisd/isis_zebra.c b/isisd/isis_zebra.c
new file mode 100644
index 00000000..d9179f91
--- /dev/null
+++ b/isisd/isis_zebra.c
@@ -0,0 +1,592 @@
+/*
+ * IS-IS Rout(e)ing protocol - isis_zebra.c   
+ *
+ * Copyright (C) 2001,2002   Sampo Saaristo
+ *                           Tampere University of Technology      
+ *                           Institute of Communications Engineering
+ *
+ * This program is free software; you can redistribute it and/or modify it 
+ * under the terms of the GNU General Public Licenseas published by the Free 
+ * Software Foundation; either version 2 of the License, or (at your option) 
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,but WITHOUT 
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for 
+ * more details.
+
+ * You should have received a copy of the GNU General Public License along 
+ * with this program; if not, write to the Free Software Foundation, Inc., 
+ * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include <zebra.h>
+#include <net/ethernet.h>
+
+#include "thread.h"
+#include "command.h"
+#include "memory.h"
+#include "log.h"
+#include "if.h"
+#include "network.h"
+#include "prefix.h"
+#include "zclient.h"
+#include "stream.h"
+#include "linklist.h"
+
+#include "isisd/isis_constants.h"
+#include "isisd/isis_common.h"
+#include "isisd/isis_circuit.h"
+#include "isisd/isis_csm.h"
+#include "isisd/isis_route.h"
+#include "isisd/isis_zebra.h"
+
+struct zclient *zclient = NULL;
+
+extern struct thread_master *master;
+
+int 
+isis_zebra_if_add (int command, struct zclient *zclient, zebra_size_t length)
+{
+  struct interface *ifp;
+
+  ifp = zebra_interface_add_read (zclient->ibuf);
+  
+
+  zlog_info ("Zebra I/F add: %s index %d flags %ld metric %d mtu %d",
+	     ifp->name, ifp->ifindex, ifp->flags, ifp->metric, ifp->mtu);
+  
+  if (if_is_up (ifp))
+    isis_csm_state_change (IF_UP_FROM_Z, circuit_scan_by_ifp (ifp), ifp);
+  
+  return 0;
+}
+
+int
+isis_zebra_if_del (int command, struct zclient *zclient, zebra_size_t length)
+{
+  struct interface *ifp;
+  struct stream *s;
+
+  s = zclient->ibuf;
+  ifp = zebra_interface_state_read (s);
+  
+  if (!ifp)
+    return 0;
+
+  if (if_is_up (ifp))
+    zlog_warn ("Zebra: got delete of %s, but interface is still up",
+               ifp->name);
+
+  zlog_info ("Zebra I/F delete: %s index %d flags %ld metric %d mtu %d",
+	     ifp->name, ifp->ifindex, ifp->flags, ifp->metric, ifp->mtu);
+
+  if_delete (ifp);
+  
+  isis_csm_state_change (IF_DOWN_FROM_Z, circuit_scan_by_ifp (ifp), ifp);
+
+  return 0;
+}
+
+struct interface *
+zebra_interface_if_lookup (struct stream *s)
+{
+  struct interface *ifp;
+  u_char ifname_tmp[INTERFACE_NAMSIZ];
+
+  /* Read interface name. */
+  stream_get (ifname_tmp, s, INTERFACE_NAMSIZ);
+
+  /* Lookup this by interface index. */
+  ifp = if_lookup_by_name (ifname_tmp);
+
+  /* If such interface does not exist, indicate an error */
+  if (!ifp)
+    return NULL;
+
+  return ifp;
+}
+
+void
+zebra_interface_if_set_value (struct stream *s, struct interface *ifp)
+{
+  /* Read interface's index. */
+  ifp->ifindex = stream_getl (s);
+
+  /* Read interface's value. */
+  ifp->flags = stream_getl (s);
+  ifp->metric = stream_getl (s);
+  ifp->mtu = stream_getl (s);
+  ifp->bandwidth = stream_getl (s);
+}
+
+int
+isis_zebra_if_state_up (int command, struct zclient *zclient, 
+			zebra_size_t length)
+{
+  struct interface *ifp;
+  
+  ifp = zebra_interface_if_lookup (zclient->ibuf);
+    
+  if (!ifp)
+    return 0;
+  
+  if (if_is_up (ifp)) {
+    zebra_interface_if_set_value (zclient->ibuf, ifp);
+    isis_circuit_update_params (circuit_scan_by_ifp (ifp), ifp);
+    return 0;
+  }
+  
+  zebra_interface_if_set_value (zclient->ibuf, ifp);
+  isis_csm_state_change (IF_UP_FROM_Z, circuit_scan_by_ifp (ifp), ifp);
+  
+  return 0;
+}
+
+
+int
+isis_zebra_if_state_down (int command, struct zclient *zclient, 
+			  zebra_size_t length)
+{
+  struct interface *ifp;
+  
+  ifp = zebra_interface_if_lookup (zclient->ibuf);
+  
+  if (ifp == NULL)
+    return 0;
+  
+  if (if_is_up (ifp)) {
+    zebra_interface_if_set_value (zclient->ibuf, ifp);
+    isis_csm_state_change (IF_DOWN_FROM_Z, circuit_scan_by_ifp (ifp), ifp);
+  }
+  
+  return 0;
+}
+
+int
+isis_zebra_if_address_add (int command, struct zclient *zclient, 
+                           zebra_size_t length)
+{
+  struct connected *c;
+  struct prefix *p;
+  u_char buf[BUFSIZ];
+
+  c = zebra_interface_address_add_read (zclient->ibuf);
+  
+  if (c == NULL)
+    return 0;
+  
+  p = c->address;
+  
+  prefix2str (p, buf, BUFSIZ);
+#ifdef EXTREME_DEBUG
+  if (p->family == AF_INET) 
+    zlog_info ("connected IP address %s", buf);
+#ifdef HAVE_IPV6
+  if (p->family == AF_INET6)
+    zlog_info ("connected IPv6 address %s", buf);
+#endif /* HAVE_IPV6 */
+#endif /* EXTREME_DEBUG */
+  isis_circuit_add_addr (circuit_scan_by_ifp (c->ifp),  c);
+
+  return 0;
+}
+
+int
+isis_zebra_if_address_del (int command, struct zclient *client, 
+                           zebra_size_t length)
+{
+  struct connected *c;
+  struct interface *ifp;
+
+  c = zebra_interface_address_delete_read (zclient->ibuf);
+  
+  if (c == NULL)
+    return 0;
+  
+  ifp = c->ifp;
+  
+  connected_free (c);
+  
+  isis_circuit_del_addr (circuit_scan_by_ifp (ifp), c);
+  
+  return 0;
+}
+
+void
+isis_zebra_route_add_ipv4 (struct prefix *prefix, 
+                           struct isis_route_info *route_info)
+{
+  u_char message, flags;
+  int psize;
+  struct stream *stream;
+  struct isis_nexthop *nexthop;
+  struct listnode *node;
+
+  if (CHECK_FLAG (route_info->flag, ISIS_ROUTE_FLAG_ZEBRA_SYNC))
+    return;
+
+  if (zclient->redist[ZEBRA_ROUTE_ISIS]) {
+    message = 0;
+    flags = 0;
+    
+    SET_FLAG (message, ZAPI_MESSAGE_NEXTHOP);
+    SET_FLAG (message, ZAPI_MESSAGE_METRIC);
+    SET_FLAG (message, ZAPI_MESSAGE_DISTANCE);
+    
+    stream = zclient->obuf;
+    stream_reset (stream);
+    /* Length place holder. */
+    stream_putw (stream, 0);
+    /* command */
+    stream_putc (stream, ZEBRA_IPV4_ROUTE_ADD);
+    /* type */
+    stream_putc (stream, ZEBRA_ROUTE_ISIS);
+    /* flags */
+    stream_putc (stream, flags);
+    /* message */
+    stream_putc (stream, message);
+    /* prefix information */
+    psize = PSIZE (prefix->prefixlen);
+    stream_putc (stream, prefix->prefixlen);
+    stream_write (stream, (u_char *)&prefix->u.prefix4, psize);      
+
+    stream_putc (stream, listcount (route_info->nexthops));
+    
+    /* Nexthop, ifindex, distance and metric information */
+    for (node = listhead (route_info->nexthops); node; nextnode (node)) {
+      nexthop = getdata (node);
+      /* FIXME: can it be ? */
+      if (nexthop->ip.s_addr != INADDR_ANY) {
+        stream_putc (stream, ZEBRA_NEXTHOP_IPV4);
+        stream_put_in_addr (stream, &nexthop->ip);
+      } else {
+        stream_putc (stream, ZEBRA_NEXTHOP_IFINDEX);
+        stream_putl (stream, nexthop->ifindex);
+      }
+    }
+    if (CHECK_FLAG (message, ZAPI_MESSAGE_DISTANCE))
+      stream_putc (stream, route_info->depth);
+    if (CHECK_FLAG (message, ZAPI_MESSAGE_METRIC))
+      stream_putl (stream, route_info->cost);
+    
+    stream_putw_at (stream, 0, stream_get_endp (stream));
+    writen (zclient->sock, stream->data, stream_get_endp (stream));
+  }
+}
+
+void
+isis_zebra_route_del_ipv4 (struct prefix *prefix, 
+                           struct isis_route_info *route_info)
+{
+  struct zapi_ipv4 api;
+  struct prefix_ipv4 prefix4;
+  
+  if (zclient->redist[ZEBRA_ROUTE_ISIS]) {
+    api.type = ZEBRA_ROUTE_ISIS;
+    api.flags = 0;
+    api.message = 0;
+    prefix4.family = AF_INET;
+    prefix4.prefixlen = prefix->prefixlen;
+    prefix4.prefix = prefix->u.prefix4;
+    zapi_ipv4_delete (zclient, &prefix4, &api);
+  }
+  
+  return;
+}
+
+#ifdef HAVE_IPV6
+void
+isis_zebra_route_add_ipv6 (struct prefix *prefix,
+                           struct isis_route_info *route_info)
+{
+  struct zapi_ipv6 api;
+  struct in6_addr **nexthop_list;
+  unsigned int *ifindex_list;
+  struct isis_nexthop6 *nexthop6;
+  int i, size;
+  struct listnode *node;
+  struct prefix_ipv6 prefix6;
+
+  if (CHECK_FLAG (route_info->flag, ISIS_ROUTE_FLAG_ZEBRA_SYNC))
+    return;
+  
+  api.type = ZEBRA_ROUTE_ISIS;
+  api.flags = 0;
+  api.message = 0;
+  SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
+  SET_FLAG (api.message, ZAPI_MESSAGE_IFINDEX);
+  SET_FLAG (api.message, ZAPI_MESSAGE_METRIC);
+  api.metric = route_info->cost;
+#if 0
+  SET_FLAG (api.message, ZAPI_MESSAGE_DISTANCE);
+  api.distance = route_info->depth;
+#endif
+  api.nexthop_num = listcount (route_info->nexthops6);
+  api.ifindex_num = listcount (route_info->nexthops6);
+  
+  /* allocate memory for nexthop_list */
+  size = sizeof (struct isis_nexthop6 *) * listcount (route_info->nexthops6);
+  nexthop_list = (struct in6_addr **) XMALLOC (MTYPE_ISIS_TMP, size);
+  if (!nexthop_list) {
+    zlog_err ("isis_zebra_add_route_ipv6: out of memory!");
+    return;
+  }
+  
+  /* allocate memory for ifindex_list */
+  size = sizeof (unsigned int) * listcount (route_info->nexthops6);
+  ifindex_list = (unsigned int *) XMALLOC (MTYPE_ISIS_TMP, size);
+  if (!ifindex_list) {
+    zlog_err ("isis_zebra_add_route_ipv6: out of memory!");
+    XFREE (MTYPE_ISIS_TMP, nexthop_list);
+    return;
+  }
+  
+  /* for each nexthop */
+  i = 0;
+  for (node = listhead (route_info->nexthops6); node; nextnode (node)) {
+    nexthop6 = getdata (node);
+    
+    if (!IN6_IS_ADDR_LINKLOCAL (&nexthop6->ip6) &&
+        !IN6_IS_ADDR_UNSPECIFIED (&nexthop6->ip6)) {
+      api.nexthop_num--;
+      api.ifindex_num--;
+      continue;
+    }
+    
+    nexthop_list[i] = &nexthop6->ip6;
+    ifindex_list[i] = nexthop6->ifindex;
+    i++;
+  }
+  
+  api.nexthop = nexthop_list;
+  api.ifindex = ifindex_list;
+  
+  if (api.nexthop_num && api.ifindex_num) {
+    prefix6.family = AF_INET6;
+    prefix6.prefixlen = prefix->prefixlen;
+    memcpy (&prefix6.prefix, &prefix->u.prefix6, sizeof (struct in6_addr));
+    zapi_ipv6_add (zclient, &prefix6, &api);
+    SET_FLAG (route_info->flag, ISIS_ROUTE_FLAG_ZEBRA_SYNC);
+  }
+  
+  XFREE (MTYPE_ISIS_TMP, nexthop_list);
+  XFREE (MTYPE_ISIS_TMP, ifindex_list);
+  
+  return;
+}
+
+void
+isis_zebra_route_del_ipv6 (struct prefix *prefix, 
+                           struct isis_route_info *route_info)
+{
+  struct zapi_ipv6 api;
+  struct in6_addr **nexthop_list;
+  unsigned int *ifindex_list;
+  struct isis_nexthop6 *nexthop6;
+  int i, size;
+  struct listnode *node;
+  struct prefix_ipv6 prefix6;
+
+  if (CHECK_FLAG (route_info->flag, ISIS_ROUTE_FLAG_ZEBRA_SYNC))
+    return;
+  
+  api.type = ZEBRA_ROUTE_ISIS;
+  api.flags = 0;
+  api.message = 0;
+  SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
+  SET_FLAG (api.message, ZAPI_MESSAGE_IFINDEX);
+  api.nexthop_num = listcount (route_info->nexthops6);
+  api.ifindex_num = listcount (route_info->nexthops6);
+  
+  /* allocate memory for nexthop_list */
+  size = sizeof (struct isis_nexthop6 *) * listcount (route_info->nexthops6);
+  nexthop_list = (struct in6_addr **) XMALLOC (MTYPE_ISIS_TMP, size);
+  if (!nexthop_list) {
+    zlog_err ("isis_zebra_route_del_ipv6: out of memory!");
+    return;
+  }
+  
+  /* allocate memory for ifindex_list */
+  size = sizeof (unsigned int) * listcount (route_info->nexthops6);
+  ifindex_list = (unsigned int *) XMALLOC (MTYPE_ISIS_TMP, size);
+  if (!ifindex_list) {
+    zlog_err ("isis_zebra_route_del_ipv6: out of memory!");
+    XFREE (MTYPE_ISIS_TMP, nexthop_list);
+    return;
+  }
+  
+  /* for each nexthop */
+  i = 0;
+  for (node = listhead (route_info->nexthops6); node; nextnode (node)) {
+    nexthop6 = getdata (node);
+    
+    if (!IN6_IS_ADDR_LINKLOCAL (&nexthop6->ip6) &&
+        !IN6_IS_ADDR_UNSPECIFIED (&nexthop6->ip6)) {
+      api.nexthop_num--;
+      api.ifindex_num--;
+      continue;
+    }
+    
+    nexthop_list[i] = &nexthop6->ip6;
+    ifindex_list[i] = nexthop6->ifindex;
+    i++;
+  }
+  
+  api.nexthop = nexthop_list;
+  api.ifindex = ifindex_list;
+  
+  if (api.nexthop_num && api.ifindex_num) {
+    prefix6.family = AF_INET6;
+    prefix6.prefixlen = prefix->prefixlen;
+    memcpy (&prefix6.prefix, &prefix->u.prefix6, sizeof (struct in6_addr));
+    zapi_ipv6_delete (zclient, &prefix6, &api);
+    UNSET_FLAG (route_info->flag, ISIS_ROUTE_FLAG_ZEBRA_SYNC);
+  }
+  
+  XFREE (MTYPE_ISIS_TMP, nexthop_list);
+  XFREE (MTYPE_ISIS_TMP, ifindex_list);  
+}
+
+
+#endif /* HAVE_IPV6 */
+
+
+
+void
+isis_zebra_route_update (struct prefix *prefix,
+                         struct isis_route_info *route_info)
+{
+  if (zclient->sock < 0)
+    return;
+
+  if (!zclient->redist[ZEBRA_ROUTE_ISIS])
+    return;
+
+  if (CHECK_FLAG (route_info->flag, ISIS_ROUTE_FLAG_ACTIVE)) {
+    if (prefix->family == AF_INET)
+      isis_zebra_route_add_ipv4 (prefix, route_info);
+#ifdef HAVE_IPV6
+    else if (prefix->family == AF_INET6)
+      isis_zebra_route_add_ipv6 (prefix, route_info);
+#endif /* HAVE_IPV6 */
+  } else { 
+    if (prefix->family == AF_INET)
+      isis_zebra_route_del_ipv4 (prefix, route_info);
+#ifdef HAVE_IPV6
+    else if (prefix->family == AF_INET6)
+      isis_zebra_route_del_ipv6 (prefix, route_info);
+#endif /* HAVE_IPV6 */
+  }
+  return;
+}
+
+
+int
+isis_zebra_read_ipv4 (int command, struct zclient *zclient, 
+		      zebra_size_t length)
+{
+  struct stream *stream;
+  struct zapi_ipv4 api;
+  struct prefix_ipv4 p;
+  unsigned long ifindex;
+  struct in_addr nexthop;
+
+  stream = zclient->ibuf;
+  memset (&p, 0, sizeof (struct prefix_ipv4));
+  ifindex = 0;
+
+  api.type    = stream_getc (stream);
+  api.flags   = stream_getc (stream);
+  api.message = stream_getc (stream);
+
+  p.family = AF_INET;
+  p.prefixlen = stream_getc (stream);
+  stream_get (&p.prefix, stream, PSIZE (p.prefixlen));
+  
+  if (CHECK_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP)) {
+      api.nexthop_num = stream_getc (stream);
+      nexthop.s_addr = stream_get_ipv4 (stream);
+  }
+  if (CHECK_FLAG (api.message, ZAPI_MESSAGE_IFINDEX)) {
+    api.ifindex_num = stream_getc (stream);
+    ifindex = stream_getl (stream);
+  }
+  if (CHECK_FLAG (api.message, ZAPI_MESSAGE_DISTANCE))
+    api.distance = stream_getc (stream);
+  if (CHECK_FLAG (api.message, ZAPI_MESSAGE_METRIC))
+    api.metric = stream_getl (stream);
+  else
+    api.metric = 0;
+  
+  if (command == ZEBRA_IPV4_ROUTE_ADD) {
+    zlog_info ("IPv4 Route add from Z");
+  }
+
+  return 0;
+}
+
+
+int 
+isis_zebra_read_ipv6 (int command, struct zclient *zclient, 
+		      zebra_size_t length)
+{
+
+  return 0;
+}
+
+#define ISIS_TYPE_IS_REDISTRIBUTED(T) \
+T == ZEBRA_ROUTE_MAX ? zclient->default_information : zclient->redist[type]
+
+int
+isis_distribute_list_update (int routetype)
+{
+  return 0;
+}
+
+int
+isis_redistribute_default_set(int routetype, int metric_type, int metric_value)
+{
+  return 0;
+}
+
+
+void
+isis_zebra_init ()
+{
+  
+  zclient = zclient_new ();
+  zclient_init (zclient, ZEBRA_ROUTE_ISIS);
+  zclient->interface_add = isis_zebra_if_add;
+  zclient->interface_delete = isis_zebra_if_del;
+  zclient->interface_up = isis_zebra_if_state_up;
+  zclient->interface_down = isis_zebra_if_state_down;
+  zclient->interface_address_add = isis_zebra_if_address_add;
+  zclient->interface_address_delete = isis_zebra_if_address_del;
+  zclient->ipv4_route_add = isis_zebra_read_ipv4;
+  zclient->ipv4_route_delete = isis_zebra_read_ipv4;
+#ifdef HAVE_IPV6
+  zclient->ipv6_route_add = isis_zebra_read_ipv6;
+  zclient->ipv6_route_delete = isis_zebra_read_ipv6;
+#endif /* HAVE_IPV6 */
+
+  return;
+}
+
+void
+isis_zebra_finish ()
+{
+
+  zclient_stop (zclient);
+  zclient_free (zclient);
+  zclient = (struct zclient *) NULL;
+
+  return;
+}
+
+
+
+
+
+
+