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245 lines
7.4 KiB
C
245 lines
7.4 KiB
C
/* Interface related header.
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Copyright (C) 1997, 98, 99 Kunihiro Ishiguro
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This file is part of GNU Zebra.
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GNU Zebra is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 2, or (at your
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option) any later version.
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GNU Zebra is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Zebra; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _ZEBRA_IF_H
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#define _ZEBRA_IF_H
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#include "linklist.h"
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/*
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Interface name length.
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Linux define value in /usr/include/linux/if.h.
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#define IFNAMSIZ 16
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FreeBSD define value in /usr/include/net/if.h.
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#define IFNAMSIZ 16
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*/
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#define INTERFACE_NAMSIZ 20
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#define INTERFACE_HWADDR_MAX 20
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/* Internal If indexes start at 0xFFFFFFFF and go down to 1 greater
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than this */
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#define IFINDEX_INTERNBASE 0x80000000
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#ifdef HAVE_PROC_NET_DEV
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struct if_stats
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{
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unsigned long rx_packets; /* total packets received */
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unsigned long tx_packets; /* total packets transmitted */
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unsigned long rx_bytes; /* total bytes received */
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unsigned long tx_bytes; /* total bytes transmitted */
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unsigned long rx_errors; /* bad packets received */
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unsigned long tx_errors; /* packet transmit problems */
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unsigned long rx_dropped; /* no space in linux buffers */
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unsigned long tx_dropped; /* no space available in linux */
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unsigned long rx_multicast; /* multicast packets received */
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unsigned long rx_compressed;
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unsigned long tx_compressed;
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unsigned long collisions;
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/* detailed rx_errors: */
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unsigned long rx_length_errors;
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unsigned long rx_over_errors; /* receiver ring buff overflow */
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unsigned long rx_crc_errors; /* recved pkt with crc error */
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unsigned long rx_frame_errors; /* recv'd frame alignment error */
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unsigned long rx_fifo_errors; /* recv'r fifo overrun */
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unsigned long rx_missed_errors; /* receiver missed packet */
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/* detailed tx_errors */
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unsigned long tx_aborted_errors;
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unsigned long tx_carrier_errors;
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unsigned long tx_fifo_errors;
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unsigned long tx_heartbeat_errors;
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unsigned long tx_window_errors;
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};
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#endif /* HAVE_PROC_NET_DEV */
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/* Interface structure */
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struct interface
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{
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/* Interface name. */
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char name[INTERFACE_NAMSIZ + 1];
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/* Interface index. */
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unsigned int ifindex;
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/* Zebra internal interface status */
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u_char status;
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#define ZEBRA_INTERFACE_ACTIVE (1 << 0)
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#define ZEBRA_INTERFACE_SUB (1 << 1)
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#define ZEBRA_INTERFACE_LINKDETECTION (1 << 2)
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/* Interface flags. */
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unsigned long flags;
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/* Interface metric */
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int metric;
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/* Interface MTU. */
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unsigned int mtu; /* IPv4 MTU */
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unsigned int mtu6; /* IPv6 MTU - probably, but not neccessarily same as mtu */
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/* Hardware address. */
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#ifdef HAVE_SOCKADDR_DL
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struct sockaddr_dl sdl;
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#else
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unsigned short hw_type;
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u_char hw_addr[INTERFACE_HWADDR_MAX];
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int hw_addr_len;
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#endif /* HAVE_SOCKADDR_DL */
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/* interface bandwidth, kbits */
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unsigned int bandwidth;
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/* description of the interface. */
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char *desc;
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/* Distribute list. */
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void *distribute_in;
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void *distribute_out;
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/* Connected address list. */
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struct list *connected;
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/* Daemon specific interface data pointer. */
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void *info;
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/* Statistics fileds. */
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#ifdef HAVE_PROC_NET_DEV
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struct if_stats stats;
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#endif /* HAVE_PROC_NET_DEV */
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#ifdef HAVE_NET_RT_IFLIST
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struct if_data stats;
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#endif /* HAVE_NET_RT_IFLIST */
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};
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/* Connected address structure. */
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struct connected
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{
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/* Attached interface. */
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struct interface *ifp;
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/* Flags for configuration. */
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u_char conf;
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#define ZEBRA_IFC_REAL (1 << 0)
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#define ZEBRA_IFC_CONFIGURED (1 << 1)
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/* Flags for connected address. */
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u_char flags;
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#define ZEBRA_IFA_SECONDARY (1 << 0)
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/* Address of connected network. */
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struct prefix *address;
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struct prefix *destination; /* broadcast or peer address; may be NULL */
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/* Label for Linux 2.2.X and upper. */
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char *label;
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};
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/* Given an IPV4 struct connected, this macro determines whether a /32
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peer address has been supplied (i.e. there is no subnet assigned) */
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#define CONNECTED_DEST_HOST(C) \
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((C)->destination && ((C)->address->prefixlen == IPV4_MAX_PREFIXLEN))
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/* Given an IPV4 struct connected, this macro determins whether it is
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a point-to-point link with a /32 peer address (i.e. there
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is no dedicated subnet for the PtP link) */
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#define CONNECTED_POINTOPOINT_HOST(C) \
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(((C)->ifp->flags & IFF_POINTOPOINT) && CONNECTED_DEST_HOST(C))
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/* Interface hook sort. */
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#define IF_NEW_HOOK 0
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#define IF_DELETE_HOOK 1
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/* There are some interface flags which are only supported by some
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operating system. */
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#ifndef IFF_NOTRAILERS
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#define IFF_NOTRAILERS 0x0
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#endif /* IFF_NOTRAILERS */
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#ifndef IFF_OACTIVE
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#define IFF_OACTIVE 0x0
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#endif /* IFF_OACTIVE */
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#ifndef IFF_SIMPLEX
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#define IFF_SIMPLEX 0x0
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#endif /* IFF_SIMPLEX */
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#ifndef IFF_LINK0
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#define IFF_LINK0 0x0
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#endif /* IFF_LINK0 */
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#ifndef IFF_LINK1
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#define IFF_LINK1 0x0
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#endif /* IFF_LINK1 */
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#ifndef IFF_LINK2
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#define IFF_LINK2 0x0
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#endif /* IFF_LINK2 */
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/* Prototypes. */
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int if_cmp_func (struct interface *, struct interface *);
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struct interface *if_new (void);
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struct interface *if_create (const char *name, int namelen);
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struct interface *if_lookup_by_index (unsigned int);
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struct interface *if_lookup_by_name (const char *);
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struct interface *if_lookup_exact_address (struct in_addr);
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struct interface *if_lookup_address (struct in_addr);
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struct interface *if_get_by_name (const char *);
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void if_delete (struct interface *);
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int if_is_up (struct interface *);
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int if_is_running (struct interface *);
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int if_is_operative (struct interface *);
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int if_is_loopback (struct interface *);
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int if_is_broadcast (struct interface *);
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int if_is_pointopoint (struct interface *);
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int if_is_multicast (struct interface *);
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void if_add_hook (int, int (*)(struct interface *));
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void if_init ();
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void if_dump_all ();
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char *ifindex2ifname (unsigned int);
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/* Connected address functions. */
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struct connected *connected_new ();
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void connected_free (struct connected *);
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void connected_add (struct interface *, struct connected *);
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struct connected *connected_add_by_prefix (struct interface *,
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struct prefix *,
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struct prefix *);
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struct connected *connected_delete_by_prefix (struct interface *,
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struct prefix *);
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struct connected *connected_lookup_address (struct interface *,
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struct in_addr);
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#ifndef HAVE_IF_NAMETOINDEX
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unsigned int if_nametoindex (const char *);
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#endif
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#ifndef HAVE_IF_INDEXTONAME
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char *if_indextoname (unsigned int, char *);
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#endif
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/* Exported variables. */
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extern struct list *iflist;
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extern struct cmd_element interface_desc_cmd;
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extern struct cmd_element no_interface_desc_cmd;
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extern struct cmd_element interface_cmd;
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extern struct cmd_element no_interface_cmd;
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extern struct cmd_element interface_pseudo_cmd;
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extern struct cmd_element no_interface_pseudo_cmd;
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#endif /* _ZEBRA_IF_H */
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