>Number: 158500
>Category: bin
>Synopsis: Add -p to arp(8) to hide permanent entries
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Wed Jun 29 18:30:26 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator: Jille Timmermans
>Release: FreeBSD 8.0-STABLE i386
>Organization:
>Environment:
System: FreeBSD 8.0-STABLE FreeBSD 8.0-STABLE #0 r204041
>Description:
I have 36 aliases on my network interfaces which result in 36 permanent
arp entries. When I want to see hosts on my network I don't care about the
permanent entries, so I'd like an option to hide them.
>How-To-Repeat:
arp -pa
>Fix:
--- arp.diff begins here ---
Index: arp.c
===================================================================
--- arp.c (revision 204041)
+++ arp.c (working copy)
@@ -99,6 +99,7 @@
static int valid_type(int type);
static int nflag; /* no reverse dns lookups */
+static int pflag = 0; /* hide permanemt entries */
static char *rifname;
static int expire_time, flags, doing_proxy, proxy_only;
@@ -119,7 +120,7 @@
int rtn = 0;
int aflag = 0; /* do it for all entries */
- while ((ch = getopt(argc, argv, "andfsSi:")) != -1)
+ while ((ch = getopt(argc, argv, "andfpsSi:")) != -1)
switch(ch) {
case 'a':
aflag = 1;
@@ -130,6 +131,9 @@
case 'n':
nflag = 1;
break;
+ case 'p':
+ pflag = 1;
+ break;
case 'S':
SETFUNC(F_REPLACE);
break;
@@ -161,6 +165,10 @@
err(1, "if_nametoindex(%s)", rifname);
}
}
+ if (pflag) {
+ if (func != F_GET && !(func == F_DELETE && aflag))
+ errx(1, "-p not applicable to this operation");
+ }
switch (func) {
case F_GET:
if (aflag) {
@@ -540,6 +548,10 @@
if (rifname && if_indextoname(sdl->sdl_index, ifname) &&
strcmp(ifname, rifname))
continue;
+ if (pflag) {
+ if (rtm->rtm_rmx.rmx_expire == 0)
+ continue;
+ }
if (addr) {
if (addr != sin2->sin_addr.s_addr)
continue;
@@ -653,10 +665,10 @@
usage(void)
{
fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
- "usage: arp [-n] [-i interface] hostname",
- " arp [-n] [-i interface] -a",
+ "usage: arp [-np] [-i interface] hostname",
+ " arp [-np] [-i interface] -a",
" arp -d hostname [pub]",
- " arp -d [-i interface] -a",
+ " arp -d [-p] [-i interface] -a",
" arp -s hostname ether_addr [temp] [reject | blackhole]
[pub [only]]",
" arp -S hostname ether_addr [temp] [reject | blackhole]
[pub [only]]",
" arp -f filename");
Index: arp.8
===================================================================
--- arp.8 (revision 204041)
+++ arp.8 (working copy)
@@ -36,11 +36,11 @@
.Nd address resolution display and control
.Sh SYNOPSIS
.Nm
-.Op Fl n
+.Op Fl np
.Op Fl i Ar interface
.Ar hostname
.Nm
-.Op Fl n
+.Op Fl np
.Op Fl i Ar interface
.Fl a
.Nm
@@ -48,6 +48,7 @@
.Op Cm pub
.Nm
.Fl d
+.Op Fl p
.Op Fl i Ar interface
.Fl a
.Nm
@@ -111,6 +112,8 @@
Show network addresses as numbers (normally
.Nm
attempts to display addresses symbolically).
+.It Fl p
+Hide permanent entries.
.It Fl s Ar hostname ether_addr
Create an
.Tn ARP
--- arp.diff ends here ---
>Release-Note:
>Audit-Trail:
>Unformatted:
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