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[IPV6] SIT: Add PRL management for ISATAP.

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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>
This commit is contained in:
Templin, Fred L
2008-03-11 18:35:59 -04:00
committed by YOSHIFUJI Hideaki
parent f0bdb7ba5a
commit fadf6bf060
7 changed files with 199 additions and 50 deletions
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24
net/ipv6/ndisc.c
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@@ -1092,6 +1092,12 @@ static void ndisc_router_discovery(struct sk_buff *skb)
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 @@ static void ndisc_router_discovery(struct sk_buff *skb)
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_defrtr:
}
}
skip_linkparms:
/*
* Process options.
*/
@@ -1268,6 +1280,10 @@ skip_defrtr:
}
#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 @@ static void ndisc_redirect_rcv(struct sk_buff *skb)
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");