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[IPV6] NDISC: Add proxy_ndp sysctl.

Browse source 
We do not always need proxy NDP functionality even we
enable forwarding.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki 2006-09-22 14:43:49 -07:00 committed by David S. Miller
parent 62dd93181a
commit fbea49e1e2
6 changed files with 27 additions and 2 deletions
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3
Documentation/networking/ip-sysctl.txt
View file

@ -765,6 +765,9 @@ conf/all/forwarding - BOOLEAN
This referred to as global forwarding.
proxy_ndp - BOOLEAN
Do proxy ndp.
conf/interface/*:
Change special settings per interface.

2
include/linux/ipv6.h
View file

@ -176,6 +176,7 @@ struct ipv6_devconf {
__s32 accept_ra_rt_info_max_plen;
#endif
#endif
__s32 proxy_ndp;
void *sysctl;
};
@ -203,6 +204,7 @@ enum {
DEVCONF_ACCEPT_RA_RTR_PREF,
DEVCONF_RTR_PROBE_INTERVAL,
DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
DEVCONF_PROXY_NDP,
DEVCONF_MAX
};

1
include/linux/sysctl.h
View file

@ -556,6 +556,7 @@ enum {
NET_IPV6_ACCEPT_RA_RTR_PREF=20,
NET_IPV6_RTR_PROBE_INTERVAL=21,
NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN=22,
NET_IPV6_PROXY_NDP=23,
__NET_IPV6_MAX
};

11
net/ipv6/addrconf.c
View file

@ -175,6 +175,7 @@ struct ipv6_devconf ipv6_devconf __read_mostly = {
.accept_ra_rt_info_max_plen = 0,
#endif
#endif
.proxy_ndp = 0,
};
static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
@ -205,6 +206,7 @@ static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
.accept_ra_rt_info_max_plen = 0,
#endif
#endif
.proxy_ndp = 0,
};
/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
@ -3337,6 +3339,7 @@ static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
#endif
#endif
array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
}
/* Maximum length of ifinfomsg attributes */
@ -3859,6 +3862,14 @@ static struct addrconf_sysctl_table
},
#endif
#endif
{
.ctl_name = NET_IPV6_PROXY_NDP,
.procname = "proxy_ndp",
.data = &ipv6_devconf.proxy_ndp,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.ctl_name = 0, /* sentinel */
}

4
net/ipv6/ip6_output.c
View file

@ -412,7 +412,9 @@ int ip6_forward(struct sk_buff *skb)
return -ETIMEDOUT;
}
if (pneigh_lookup(&nd_tbl, &hdr->daddr, skb->dev, 0)) {
/* XXX: idev->cnf.proxy_ndp? */
if (ipv6_devconf.proxy_ndp &&
pneigh_lookup(&nd_tbl, &hdr->daddr, skb->dev, 0)) {
int proxied = ip6_forward_proxy_check(skb);
if (proxied > 0)
return ip6_input(skb);

8
net/ipv6/ndisc.c
View file

@ -824,6 +824,7 @@ static void ndisc_recv_ns(struct sk_buff *skb)
if (ipv6_chk_acast_addr(dev, &msg->target) ||
(idev->cnf.forwarding &&
(ipv6_devconf.proxy_ndp || idev->cnf.proxy_ndp) &&
(pneigh = pneigh_lookup(&nd_tbl,
&msg->target, dev, 0)) != NULL)) {
if (!(NEIGH_CB(skb)->flags & LOCALLY_ENQUEUED) &&
@ -966,8 +967,13 @@ static void ndisc_recv_na(struct sk_buff *skb)
* has already sent a NA to us.
*/
if (lladdr && !memcmp(lladdr, dev->dev_addr, dev->addr_len) &&
pneigh_lookup(&nd_tbl, &msg->target, dev, 0))
ipv6_devconf.forwarding && ipv6_devconf.proxy_ndp &&
pneigh_lookup(&nd_tbl, &msg->target, dev, 0)) {
/* XXX: idev->cnf.prixy_ndp */
WARN_ON(skb->dst != NULL &&
((struct rt6_info *)skb->dst)->rt6i_idev);
goto out;
}
neigh_update(neigh, lladdr,
msg->icmph.icmp6_solicited ? NUD_REACHABLE : NUD_STALE,