networking: add 'ip neigh' command

This patch ports the 'ip neigh' command, originally written by Alexey
Kuznetsov, <kuznet@ms2.inr.ac.ru>, to busybox.

The base of the port is the version of iproute that shipped with
Debian Squeeze, taken from:

  http://http.debian.net/debian/pool/main/i/iproute/iproute_20100519.orig.tar.gz

This patch has actively been used by the Open Network Install
Environment (ONIE) project for over 3 years without incident.

function                                             old     new   delta
print_neigh                                            -     933    +933
ipneigh_list_or_flush                                  -     742    +742
get_hz                                                 -     109    +109
do_ipneigh                                             -      62     +62
do_iproute                                          2112    2153     +41
packed_usage                                       30647   30667     +20
ipneigh_main                                           -      14     +14
static.ip_neigh_commands                               -      12     +12
static.nuds                                            -       9      +9
static.ip_func_ptrs                                   32      36      +4
print_route                                         1858    1727    -131
------------------------------------------------------------------------------
(add/remove: 8/0 grow/shrink: 3/1 up/down: 1946/-131)        Total: 1815 bytes

Signed-off-by: Curt Brune <curt@cumulusnetworks.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/networking/Config.src b/networking/Config.src
index 43ccbf385..8c7417f86 100644
--- a/networking/Config.src
+++ b/networking/Config.src
@@ -554,6 +554,13 @@ config FEATURE_IP_RULE
         help
           Add support for rule commands to "ip".
 
+config FEATURE_IP_NEIGH
+        bool "ip neighbor"
+        default y
+        depends on IP
+        help
+          Add support for neighbor commands to "ip".
+
 config FEATURE_IP_SHORT_FORMS
         bool "Support short forms of ip commands"
         default y
@@ -565,6 +572,7 @@ config FEATURE_IP_SHORT_FORMS
           ip route  -> iproute
           ip tunnel -> iptunnel
           ip rule   -> iprule
+          ip neigh  -> ipneigh
 
           Say N unless you desparately need the short form of the ip
           object commands.
@@ -604,6 +612,11 @@ config IPRULE
         default y
         depends on FEATURE_IP_SHORT_FORMS && FEATURE_IP_RULE
 
+config IPNEIGH
+        bool
+        default y
+        depends on FEATURE_IP_SHORT_FORMS && FEATURE_IP_NEIGH
+
 config IPCALC
         bool "ipcalc"
         default y