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networking: add 'ip neigh' command

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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>
This commit is contained in:
Curt Brune
2015-10-14 12:53:47 +02:00
committed by Denys Vlasenko
parent 7b85ec30b5
commit 69934701fd
8 changed files with 420 additions and 26 deletions
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26
networking/libiproute/iproute.c
View File

@@ -55,28 +55,6 @@ static int flush_update(void)
return 0;
}
static unsigned get_hz(void)
{
static unsigned hz_internal;
FILE *fp;
if (hz_internal)
return hz_internal;
fp = fopen_for_read("/proc/net/psched");
if (fp) {
unsigned nom, denom;
if (fscanf(fp, "%*08x%*08x%08x%08x", &nom, &denom) == 2)
if (nom == 1000000)
hz_internal = denom;
fclose(fp);
}
if (!hz_internal)
hz_internal = bb_clk_tck();
return hz_internal;
}
static int FAST_FUNC print_route(const struct sockaddr_nl *who UNUSED_PARAM,
struct nlmsghdr *n, void *arg UNUSED_PARAM)
{
@@ -217,7 +195,7 @@ static int FAST_FUNC print_route(const struct sockaddr_nl *who UNUSED_PARAM,
if (NLMSG_ALIGN(G_filter.flushp) + n->nlmsg_len > G_filter.flushe) {
if (flush_update())
bb_error_msg_and_die("flush");
xfunc_die();
}
fn = (void*)(G_filter.flushb + NLMSG_ALIGN(G_filter.flushp));
memcpy(fn, n, n->nlmsg_len);
@@ -954,7 +932,7 @@ int FAST_FUNC do_iproute(char **argv)
case 11: /* flush */
return iproute_list_or_flush(argv+1, 1);
default:
bb_error_msg_and_die("unknown command %s", *argv);
invarg(*argv, applet_name);
}
return iproute_modify(cmd, flags, argv+1);