[IPV6] SIT: Add PRL management for ISATAP.
This patch updates the Linux the Intra-Site Automatic Tunnel Addressing
Protocol (ISATAP) implementation. It places the ISATAP potential router
list (PRL) in the kernel and adds three new private ioctls for PRL
management.
[Add several changes of structure name, constant names etc. - yoshfuji]
Signed-off-by: Fred L. Templin <fred.l.templin@boeing.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 510aa74..53b5460 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1092,6 +1092,12 @@
return;
}
+ if (skb->ndisc_nodetype == NDISC_NODETYPE_HOST) {
+ ND_PRINTK2(KERN_WARNING
+ "ICMPv6 RA: from host or unauthorized router\n");
+ return;
+ }
+
/*
* set the RA_RECV flag in the interface
*/
@@ -1115,6 +1121,10 @@
return;
}
+ /* skip link-specific parameters from interior routers */
+ if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT)
+ goto skip_linkparms;
+
if (in6_dev->if_flags & IF_RS_SENT) {
/*
* flag that an RA was received after an RS was sent
@@ -1229,6 +1239,8 @@
}
}
+skip_linkparms:
+
/*
* Process options.
*/
@@ -1268,6 +1280,10 @@
}
#endif
+ /* skip link-specific ndopts from interior routers */
+ if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT)
+ goto out;
+
if (in6_dev->cnf.accept_ra_pinfo && ndopts.nd_opts_pi) {
struct nd_opt_hdr *p;
for (p = ndopts.nd_opts_pi;
@@ -1331,6 +1347,14 @@
int optlen;
u8 *lladdr = NULL;
+ switch (skb->ndisc_nodetype) {
+ case NDISC_NODETYPE_HOST:
+ case NDISC_NODETYPE_NODEFAULT:
+ ND_PRINTK2(KERN_WARNING
+ "ICMPv6 Redirect: from host or unauthorized router\n");
+ return;
+ }
+
if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) {
ND_PRINTK2(KERN_WARNING
"ICMPv6 Redirect: source address is not link-local.\n");