Commit abd596a4 authored by Neil Horman's avatar Neil Horman Committed by David S. Miller
Browse files

[IPV4] ARP: Alloc acceptance of unsolicited ARP via netdevice sysctl.


Signed-off-by: default avatarNeil Horman <nhorman@tuxdriver.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 59f1741e
......@@ -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;
......
......@@ -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
};
......
......@@ -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;
......
......@@ -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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