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[neighbour] Add nstat() function to print out neighbour table

Signed-off-by: Michael Brown <mcb30@ipxe.org>
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mcb30 committed Sep 25, 2013
1 parent cba22d3 commit 37ccbd301df299880dcaeae6e48362e998f66c6a
Showing with 115 additions and 41 deletions.
  1. +44 −0 src/include/ipxe/neighbour.h
  2. +14 −0 src/include/usr/neighmgmt.h
  3. +1 −41 src/net/neighbour.c
  4. +56 −0 src/usr/neighmgmt.c
@@ -9,7 +9,11 @@

FILE_LICENCE ( GPL2_OR_LATER );

#include <stdint.h>
#include <ipxe/refcnt.h>
#include <ipxe/list.h>
#include <ipxe/netdevice.h>
#include <ipxe/retry.h>

/** A neighbour discovery protocol */
struct neighbour_discovery {
@@ -29,6 +33,46 @@ struct neighbour_discovery {
const void *net_dest, const void *net_source );
};

/** A neighbour cache entry */
struct neighbour {
/** Reference count */
struct refcnt refcnt;
/** List of neighbour cache entries */
struct list_head list;

/** Network device */
struct net_device *netdev;
/** Network-layer protocol */
struct net_protocol *net_protocol;
/** Network-layer destination address */
uint8_t net_dest[MAX_NET_ADDR_LEN];
/** Link-layer destination address */
uint8_t ll_dest[MAX_LL_ADDR_LEN];

/** Neighbour discovery protocol (if any) */
struct neighbour_discovery *discovery;
/** Network-layer source address (if any) */
uint8_t net_source[MAX_NET_ADDR_LEN];
/** Retransmission timer */
struct retry_timer timer;

/** Pending I/O buffers */
struct list_head tx_queue;
};

/**
* Test if neighbour cache entry has a valid link-layer address
*
* @v neighbour Neighbour cache entry
* @ret has_ll_dest Neighbour cache entry has a valid link-layer address
*/
static inline __attribute__ (( always_inline )) int
neighbour_has_ll_dest ( struct neighbour *neighbour ) {
return ( ! timer_running ( &neighbour->timer ) );
}

extern struct list_head neighbours;

extern int neighbour_tx ( struct io_buffer *iobuf, struct net_device *netdev,
struct net_protocol *net_protocol,
const void *net_dest,
@@ -0,0 +1,14 @@
#ifndef _USR_NEIGHMGMT_H
#define _USR_NEIGHMGMT_H

/** @file
*
* Neighbour management
*
*/

FILE_LICENCE ( GPL2_OR_LATER );

extern void nstat ( void );

#endif /* _USR_NEIGHMGMT_H */
@@ -23,8 +23,6 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ipxe/refcnt.h>
#include <ipxe/list.h>
#include <ipxe/iobuf.h>
#include <ipxe/retry.h>
#include <ipxe/timer.h>
@@ -40,41 +38,14 @@ FILE_LICENCE ( GPL2_OR_LATER );
*
*/

/** A neighbour cache entry */
struct neighbour {
/** Reference count */
struct refcnt refcnt;
/** List of neighbour cache entries */
struct list_head list;

/** Network device */
struct net_device *netdev;
/** Network-layer protocol */
struct net_protocol *net_protocol;
/** Network-layer destination address */
uint8_t net_dest[MAX_NET_ADDR_LEN];
/** Link-layer destination address */
uint8_t ll_dest[MAX_LL_ADDR_LEN];

/** Neighbour discovery protocol (if any) */
struct neighbour_discovery *discovery;
/** Network-layer source address (if any) */
uint8_t net_source[MAX_NET_ADDR_LEN];
/** Retransmission timer */
struct retry_timer timer;

/** Pending I/O buffers */
struct list_head tx_queue;
};

/** Neighbour discovery minimum timeout */
#define NEIGHBOUR_MIN_TIMEOUT ( TICKS_PER_SEC / 8 )

/** Neighbour discovery maximum timeout */
#define NEIGHBOUR_MAX_TIMEOUT ( TICKS_PER_SEC * 3 )

/** The neighbour cache */
static LIST_HEAD ( neighbours );
struct list_head neighbours = LIST_HEAD_INIT ( neighbours );

static void neighbour_expired ( struct retry_timer *timer, int over );

@@ -97,17 +68,6 @@ static void neighbour_free ( struct refcnt *refcnt ) {
free ( neighbour );
}

/**
* Test if neighbour cache entry has a valid link-layer address
*
* @v neighbour Neighbour cache entry
* @ret has_ll_dest Neighbour cache entry has a valid link-layer address
*/
static inline __attribute__ (( always_inline )) int
neighbour_has_ll_dest ( struct neighbour *neighbour ) {
return ( ! timer_running ( &neighbour->timer ) );
}

/**
* Create neighbour cache entry
*
@@ -0,0 +1,56 @@
/*
* Copyright (C) 2013 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program 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 of the
* License, or 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/

FILE_LICENCE ( GPL2_OR_LATER );

#include <stdio.h>
#include <ipxe/neighbour.h>
#include <usr/neighmgmt.h>

/** @file
*
* Neighbour management
*
*/

/**
* Print neighbour table
*
*/
void nstat ( void ) {
struct neighbour *neighbour;
struct net_device *netdev;
struct ll_protocol *ll_protocol;
struct net_protocol *net_protocol;

list_for_each_entry ( neighbour, &neighbours, list ) {
netdev = neighbour->netdev;
ll_protocol = netdev->ll_protocol;
net_protocol = neighbour->net_protocol;
printf ( "%s %s %s is %s %s", netdev->name, net_protocol->name,
net_protocol->ntoa ( neighbour->net_dest ),
ll_protocol->name,
( neighbour_has_ll_dest ( neighbour ) ?
ll_protocol->ntoa ( neighbour->ll_dest ) :
"(incomplete)" ) );
if ( neighbour->discovery )
printf ( " (%s)", neighbour->discovery->name );
printf ( "\n" );
}
}

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