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-rw-r--r--Documentation/networking/ip-sysctl.txt9
-rw-r--r--include/linux/ipv6.h4
-rw-r--r--include/linux/sysctl.h1
-rw-r--r--net/ipv6/addrconf.c19
-rw-r--r--net/ipv6/ndisc.c4
5 files changed, 36 insertions, 1 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 88efed0a533f..35aed1c6dd98 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -729,6 +729,15 @@ accept_ra_pinfo - BOOLEAN
Functional default: enabled if accept_ra is enabled.
disabled if accept_ra is disabled.
+accept_ra_rt_info_max_plen - INTEGER
+ Maximum prefix length of Route Information in RA.
+
+ Route Information w/ prefix larger than or equal to this
+ variable shall be ignored.
+
+ Functional default: 0 if accept_ra_rtr_pref is enabled.
+ -1 if accept_ra_rtr_pref is disabled.
+
accept_ra_rtr_pref - BOOLEAN
Accept Router Preference in RA.
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index c609cc702375..1263d8cb3c18 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -150,6 +150,9 @@ struct ipv6_devconf {
#ifdef CONFIG_IPV6_ROUTER_PREF
__s32 accept_ra_rtr_pref;
__s32 rtr_probe_interval;
+#ifdef CONFIG_IPV6_ROUTE_INFO
+ __s32 accept_ra_rt_info_max_plen;
+#endif
#endif
void *sysctl;
};
@@ -177,6 +180,7 @@ enum {
DEVCONF_ACCEPT_RA_PINFO,
DEVCONF_ACCEPT_RA_RTR_PREF,
DEVCONF_RTR_PROBE_INTERVAL,
+ DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
DEVCONF_MAX
};
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index f49488ffefef..8ad4beab2888 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -535,6 +535,7 @@ enum {
NET_IPV6_ACCEPT_RA_PINFO=19,
NET_IPV6_ACCEPT_RA_RTR_PREF=20,
NET_IPV6_RTR_PROBE_INTERVAL=21,
+ NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN=22,
__NET_IPV6_MAX
};
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index e7add61e6e39..eb82cd5df8c6 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -170,6 +170,9 @@ struct ipv6_devconf ipv6_devconf = {
#ifdef CONFIG_IPV6_ROUTER_PREF
.accept_ra_rtr_pref = 1,
.rtr_probe_interval = 60 * HZ,
+#ifdef CONFIG_IPV6_ROUTE_INFO
+ .accept_ra_rt_info_max_plen = 0,
+#endif
#endif
};
@@ -197,6 +200,9 @@ static struct ipv6_devconf ipv6_devconf_dflt = {
#ifdef CONFIG_IPV6_ROUTER_PREF
.accept_ra_rtr_pref = 1,
.rtr_probe_interval = 60 * HZ,
+#ifdef CONFIG_IPV6_ROUTE_INFO
+ .accept_ra_rt_info_max_plen = 0,
+#endif
#endif
};
@@ -3133,6 +3139,9 @@ static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
#ifdef CONFIG_IPV6_ROUTER_PREF
array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
+#ifdef CONFIV_IPV6_ROUTE_INFO
+ array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
+#endif
#endif
}
@@ -3620,6 +3629,16 @@ static struct addrconf_sysctl_table
.proc_handler = &proc_dointvec_jiffies,
.strategy = &sysctl_jiffies,
},
+#ifdef CONFIV_IPV6_ROUTE_INFO
+ {
+ .ctl_name = NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,
+ .procname = "accept_ra_rt_info_max_plen",
+ .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
#endif
{
.ctl_name = 0, /* sentinel */
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 1f6256909674..dfa20d3be9b6 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1214,11 +1214,13 @@ skip_defrtr:
}
#ifdef CONFIG_IPV6_ROUTE_INFO
- if (ndopts.nd_opts_ri) {
+ if (in6_dev->cnf.accept_ra_rtr_pref && ndopts.nd_opts_ri) {
struct nd_opt_hdr *p;
for (p = ndopts.nd_opts_ri;
p;
p = ndisc_next_option(p, ndopts.nd_opts_ri_end)) {
+ if (((struct route_info *)p)->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen)
+ continue;
rt6_route_rcv(skb->dev, (u8*)p, (p->nd_opt_len) << 3,
&skb->nh.ipv6h->saddr);
}