Initial revision
diff --git a/zebra/rtread_proc.c b/zebra/rtread_proc.c
new file mode 100644
index 0000000..320152e
--- /dev/null
+++ b/zebra/rtread_proc.c
@@ -0,0 +1,169 @@
+/*
+ * Kernel routing readup by /proc filesystem
+ * Copyright (C) 1997 Kunihiro Ishiguro
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra 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 GNU Zebra; see the file COPYING. If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include <zebra.h>
+
+#include "prefix.h"
+#include "log.h"
+#include "if.h"
+#include "rib.h"
+
+/* Proc file system to read IPv4 routing table. */
+#ifndef _PATH_PROCNET_ROUTE
+#define _PATH_PROCNET_ROUTE "/proc/net/route"
+#endif /* _PATH_PROCNET_ROUTE */
+
+/* Proc file system to read IPv6 routing table. */
+#ifndef _PATH_PROCNET_ROUTE6
+#define _PATH_PROCNET_ROUTE6 "/proc/net/ipv6_route"
+#endif /* _PATH_PROCNET_ROUTE6 */
+
+/* To read interface's name */
+#define INTERFACE_NAMSIZ 20
+
+/* Reading buffer for one routing entry. */
+#define RT_BUFSIZ 1024
+
+/* Kernel routing table read up by /proc filesystem. */
+int
+proc_route_read ()
+{
+ FILE *fp;
+ char buf[RT_BUFSIZ];
+ char iface[INTERFACE_NAMSIZ], dest[9], gate[9], mask[9];
+ int flags, refcnt, use, metric, mtu, window, rtt;
+
+ /* Open /proc filesystem */
+ fp = fopen (_PATH_PROCNET_ROUTE, "r");
+ if (fp == NULL)
+ {
+ zlog_warn ("Can't open %s : %s\n", _PATH_PROCNET_ROUTE, strerror (errno));
+ return -1;
+ }
+
+ /* Drop first label line. */
+ fgets (buf, RT_BUFSIZ, fp);
+
+ while (fgets (buf, RT_BUFSIZ, fp) != NULL)
+ {
+ int n;
+ struct prefix_ipv4 p;
+ struct in_addr tmpmask;
+ struct in_addr gateway;
+ u_char zebra_flags = 0;
+
+ n = sscanf (buf, "%s %s %s %x %d %d %d %s %d %d %d",
+ iface, dest, gate, &flags, &refcnt, &use, &metric,
+ mask, &mtu, &window, &rtt);
+ if (n != 11)
+ {
+ zlog_warn ("can't read all of routing information\n");
+ continue;
+ }
+ if (! (flags & RTF_UP))
+ continue;
+ if (! (flags & RTF_GATEWAY))
+ continue;
+
+ if (flags & RTF_DYNAMIC)
+ zebra_flags |= ZEBRA_FLAG_SELFROUTE;
+
+ p.family = AF_INET;
+ sscanf (dest, "%lX", (unsigned long *)&p.prefix);
+ sscanf (mask, "%lX", (unsigned long *)&tmpmask);
+ p.prefixlen = ip_masklen (tmpmask);
+ sscanf (gate, "%lX", (unsigned long *)&gateway);
+
+ rib_add_ipv4 (ZEBRA_ROUTE_KERNEL, zebra_flags, &p, &gateway, 0, 0, 0, 0);
+ }
+
+ return 0;
+}
+
+#ifdef HAVE_IPV6
+int
+proc_ipv6_route_read ()
+{
+ FILE *fp;
+ char buf [RT_BUFSIZ];
+
+ /* Open /proc filesystem */
+ fp = fopen (_PATH_PROCNET_ROUTE6, "r");
+ if (fp == NULL)
+ {
+ zlog_warn ("Can't open %s : %s", _PATH_PROCNET_ROUTE6,
+ strerror (errno));
+ return -1;
+ }
+
+ /* There is no title line, so we don't drop first line. */
+ while (fgets (buf, RT_BUFSIZ, fp) != NULL)
+ {
+ int n;
+ char dest[33], src[33], gate[33];
+ char iface[INTERFACE_NAMSIZ];
+ int dest_plen, src_plen;
+ int metric, use, refcnt, flags;
+ struct prefix_ipv6 p;
+ struct in6_addr gateway;
+ u_char zebra_flags = 0;
+
+ /* Linux 2.1.x write this information at net/ipv6/route.c
+ rt6_info_node () */
+ n = sscanf (buf, "%32s %02x %32s %02x %32s %08x %08x %08x %08x %s",
+ dest, &dest_plen, src, &src_plen, gate,
+ &metric, &use, &refcnt, &flags, iface);
+
+ if (n != 10)
+ {
+ /* zlog_warn ("can't read all of routing information %d\n%s\n", n, buf); */
+ continue;
+ }
+
+ if (! (flags & RTF_UP))
+ continue;
+ if (! (flags & RTF_GATEWAY))
+ continue;
+
+ if (flags & RTF_DYNAMIC)
+ zebra_flags |= ZEBRA_FLAG_SELFROUTE;
+
+ p.family = AF_INET6;
+ str2in6_addr (dest, &p.prefix);
+ str2in6_addr (gate, &gateway);
+ p.prefixlen = dest_plen;
+
+ rib_add_ipv6 (ZEBRA_ROUTE_KERNEL, zebra_flags, &p, &gateway, 0, 0);
+ }
+
+ return 0;
+}
+#endif /* HAVE_IPV6 */
+
+void
+route_read ()
+{
+ proc_route_read ();
+#ifdef HAVE_IPV6
+ proc_ipv6_route_read ();
+#endif /* HAVE_IPV6 */
+}