Initial revision

1 files changed, 246 insertions, 0 deletions

diff --git a/zebra/if_proc.c b/zebra/if_proc.c
new file mode 100644
index 00000000..117859fd
--- /dev/null
+++ b/zebra/if_proc.c
@@ -0,0 +1,246 @@
+/* Interface name and statistics get function using proc file system
+ * Copyright (C) 1999 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 "if.h"
+#include "prefix.h"
+#include "log.h"
+
+#include "zebra/ioctl.h"
+#include "zebra/connected.h"
+#include "zebra/interface.h"
+
+/* Proc filesystem one line buffer. */
+#define PROCBUFSIZ                  1024
+
+/* Path to device proc file system. */
+#ifndef _PATH_PROC_NET_DEV
+#define _PATH_PROC_NET_DEV        "/proc/net/dev"
+#endif /* _PATH_PROC_NET_DEV */
+
+/* Return statistics data pointer. */
+static char *
+interface_name_cut (char *buf, char **name)
+{
+  char *stat;
+
+  /* Skip white space.  Line will include header spaces. */
+  while (*buf == ' ')
+    buf++;
+  *name = buf;
+
+  /* Cut interface name. */
+  stat = strrchr (buf, ':');
+  *stat++ = '\0';
+
+  return stat;
+}
+
+/* Fetch each statistics field. */
+static int
+ifstat_dev_fields (int version, char *buf, struct interface *ifp)
+{
+  switch (version) 
+    {
+    case 3:
+      sscanf(buf,
+	     "%ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld",
+	     &ifp->stats.rx_bytes,
+	     &ifp->stats.rx_packets,
+	     &ifp->stats.rx_errors,
+	     &ifp->stats.rx_dropped,
+	     &ifp->stats.rx_fifo_errors,
+	     &ifp->stats.rx_frame_errors,
+	     &ifp->stats.rx_compressed,
+	     &ifp->stats.rx_multicast,
+
+	     &ifp->stats.tx_bytes,
+	     &ifp->stats.tx_packets,
+	     &ifp->stats.tx_errors,
+	     &ifp->stats.tx_dropped,
+	     &ifp->stats.tx_fifo_errors,
+	     &ifp->stats.collisions,
+	     &ifp->stats.tx_carrier_errors,
+	     &ifp->stats.tx_compressed);
+      break;
+    case 2:
+      sscanf(buf, "%ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld",
+	     &ifp->stats.rx_bytes,
+	     &ifp->stats.rx_packets,
+	     &ifp->stats.rx_errors,
+	     &ifp->stats.rx_dropped,
+	     &ifp->stats.rx_fifo_errors,
+	     &ifp->stats.rx_frame_errors,
+
+	     &ifp->stats.tx_bytes,
+	     &ifp->stats.tx_packets,
+	     &ifp->stats.tx_errors,
+	     &ifp->stats.tx_dropped,
+	     &ifp->stats.tx_fifo_errors,
+	     &ifp->stats.collisions,
+	     &ifp->stats.tx_carrier_errors);
+      ifp->stats.rx_multicast = 0;
+      break;
+    case 1:
+      sscanf(buf, "%ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld",
+	     &ifp->stats.rx_packets,
+	     &ifp->stats.rx_errors,
+	     &ifp->stats.rx_dropped,
+	     &ifp->stats.rx_fifo_errors,
+	     &ifp->stats.rx_frame_errors,
+
+	     &ifp->stats.tx_packets,
+	     &ifp->stats.tx_errors,
+	     &ifp->stats.tx_dropped,
+	     &ifp->stats.tx_fifo_errors,
+	     &ifp->stats.collisions,
+	     &ifp->stats.tx_carrier_errors);
+      ifp->stats.rx_bytes = 0;
+      ifp->stats.tx_bytes = 0;
+      ifp->stats.rx_multicast = 0;
+      break;
+    }
+  return 0;
+}
+
+/* Update interface's statistics. */
+int
+ifstat_update_proc ()
+{
+  FILE *fp;
+  char buf[PROCBUFSIZ];
+  int version;
+  struct interface *ifp;
+  char *stat;
+  char *name;
+
+  /* Open /proc/net/dev. */
+  fp = fopen (_PATH_PROC_NET_DEV, "r");
+  if (fp == NULL)
+    {
+      zlog_warn ("Can't open proc file %s: %s",
+		 _PATH_PROC_NET_DEV, strerror (errno));
+      return -1;
+    }
+
+  /* Drop header lines. */
+  fgets (buf, PROCBUFSIZ, fp);
+  fgets (buf, PROCBUFSIZ, fp);
+
+  /* To detect proc format veresion, parse second line. */
+  if (strstr (buf, "compressed"))
+    version = 3;
+  else if (strstr (buf, "bytes"))
+    version = 2;
+  else
+    version = 1;
+
+  /* Update each interface's statistics. */
+  while (fgets (buf, PROCBUFSIZ, fp) != NULL)
+    {
+      stat = interface_name_cut (buf, &name);
+      ifp = if_get_by_name (name);
+      ifstat_dev_fields (version, stat, ifp);
+    }
+
+  return 0;
+}
+
+/* Interface structure allocation by proc filesystem. */
+int
+interface_list_proc ()
+{
+  FILE *fp;
+  char buf[PROCBUFSIZ];
+  struct interface *ifp;
+  char *name;
+
+  /* Open /proc/net/dev. */
+  fp = fopen (_PATH_PROC_NET_DEV, "r");
+  if (fp == NULL)
+    {
+      zlog_warn ("Can't open proc file %s: %s",
+		 _PATH_PROC_NET_DEV, strerror (errno));
+      return -1;
+    }
+
+  /* Drop header lines. */
+  fgets (buf, PROCBUFSIZ, fp);
+  fgets (buf, PROCBUFSIZ, fp);
+
+  /* Only allocate interface structure.  Other jobs will be done in
+     if_ioctl.c. */
+  while (fgets (buf, PROCBUFSIZ, fp) != NULL)
+    {
+      interface_name_cut (buf, &name);
+      ifp = if_get_by_name (name);
+      if_add_update (ifp);
+    }
+  return 0;
+}
+
+#if defined(HAVE_IPV6) && defined(HAVE_PROC_NET_IF_INET6)
+
+#ifndef _PATH_PROC_NET_IF_INET6
+#define _PATH_PROC_NET_IF_INET6          "/proc/net/if_inet6"
+#endif /* _PATH_PROC_NET_IF_INET6 */
+
+int
+ifaddr_proc_ipv6 ()
+{
+  FILE *fp;
+  char buf[PROCBUFSIZ];
+  int n;
+  char addr[33];
+  char ifname[20];
+  int ifindex, plen, scope, status;
+  struct interface *ifp;
+  struct prefix_ipv6 p;
+
+  /* Open proc file system. */
+  fp = fopen (_PATH_PROC_NET_IF_INET6, "r");
+  if (fp == NULL)
+    {
+      zlog_warn ("Can't open proc file %s: %s",
+		 _PATH_PROC_NET_IF_INET6, strerror (errno));
+      return -1;
+    }
+  
+  /* Get interface's IPv6 address. */
+  while (fgets (buf, PROCBUFSIZ, fp) != NULL)
+    {
+      n = sscanf (buf, "%32s %02x %02x %02x %02x %20s", 
+		  addr, &ifindex, &plen, &scope, &status, ifname);
+      if (n != 6)
+	continue;
+
+      ifp = if_get_by_name (ifname);
+
+      /* Fetch interface's IPv6 address. */
+      str2in6_addr (addr, &p.prefix);
+      p.prefixlen = plen;
+
+      connected_add_ipv6 (ifp, &p.prefix, p.prefixlen, NULL);
+    }
+  return 0;
+}
+#endif /* HAVE_IPV6 && HAVE_PROC_NET_IF_INET6 */