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| author | Templin, Fred L <Fred.L.Templin@boeing.com> | 2008-03-11 18:35:59 -0400 |
|---|---|---|
| committer | YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | 2008-04-03 10:05:58 +0900 |
| commit | fadf6bf06069138f8e97c9a963be38348ba2708b (patch) | |
| tree | a21470d3db41e5969143f5cd272bc6270dcb384a /net/ipv6/ndisc.c | |
| parent | f0bdb7ba5af5a7028479e9067ee74e9d66eea6df (diff) | |
| download | linux-fadf6bf06069138f8e97c9a963be38348ba2708b.tar.bz2 | |
[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>
Diffstat (limited to 'net/ipv6/ndisc.c')
| -rw-r--r-- | net/ipv6/ndisc.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index 510aa747a404..53b546019fd5 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -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"); |