From abd596a4b68b6526c2676233e10602dd9660e9d7 Mon Sep 17 00:00:00 2001
From: Neil Horman <nhorman@tuxdriver.com>
Date: Mon, 20 Mar 2006 22:39:47 -0800
Subject: [PATCH] [IPV4] ARP: Alloc acceptance of unsolicited ARP via netdevice
sysctl.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/linux/inetdevice.h | 1 +
include/linux/sysctl.h | 1 +
net/ipv4/arp.c | 20 ++++++++++----------
net/ipv4/devinet.c | 8 ++++++++
4 files changed, 20 insertions(+), 10 deletions(-)
diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
index fd7af86151b1..92297ff24e85 100644
--- a/include/linux/inetdevice.h
+++ b/include/linux/inetdevice.h
@@ -25,6 +25,7 @@ struct ipv4_devconf
int arp_filter;
int arp_announce;
int arp_ignore;
+ int arp_accept;
int medium_id;
int no_xfrm;
int no_policy;
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index dfcf449afc7c..8754568a75d7 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -456,6 +456,7 @@ enum
NET_IPV4_CONF_ARP_ANNOUNCE=18,
NET_IPV4_CONF_ARP_IGNORE=19,
NET_IPV4_CONF_PROMOTE_SECONDARIES=20,
+ NET_IPV4_CONF_ARP_ACCEPT=21,
__NET_IPV4_CONF_MAX
};
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index accdefedfed7..041dadde31af 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -879,16 +879,16 @@ static int arp_process(struct sk_buff *skb)
n = __neigh_lookup(&arp_tbl, &sip, dev, 0);
-#ifdef CONFIG_IP_ACCEPT_UNSOLICITED_ARP
- /* Unsolicited ARP is not accepted by default.
- It is possible, that this option should be enabled for some
- devices (strip is candidate)
- */
- if (n == NULL &&
- arp->ar_op == htons(ARPOP_REPLY) &&
- inet_addr_type(sip) == RTN_UNICAST)
- n = __neigh_lookup(&arp_tbl, &sip, dev, -1);
-#endif
+ if (ipv4_devconf.arp_accept) {
+ /* Unsolicited ARP is not accepted by default.
+ It is possible, that this option should be enabled for some
+ devices (strip is candidate)
+ */
+ if (n == NULL &&
+ arp->ar_op == htons(ARPOP_REPLY) &&
+ inet_addr_type(sip) == RTN_UNICAST)
+ n = __neigh_lookup(&arp_tbl, &sip, dev, -1);
+ }
if (n) {
int state = NUD_REACHABLE;
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 3ffa60dadc0c..44fdf1413e2c 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1393,6 +1393,14 @@ static struct devinet_sysctl_table {
.mode = 0644,
.proc_handler = &proc_dointvec,
},
+ {
+ .ctl_name = NET_IPV4_CONF_ARP_ACCEPT,
+ .procname = "arp_accept",
+ .data = &ipv4_devconf.arp_accept,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
{
.ctl_name = NET_IPV4_CONF_NOXFRM,
.procname = "disable_xfrm",
--
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