Add inbound interface of routing header type 2 for Mobile IPv6.
Based on MIPL2 kernel patch.
---
include/net/addrconf.h | 7 +++++
net/ipv6/exthdrs.c | 71 +++++++++++++++++++++++++++++++++++++++++++-----
2 files changed, 70 insertions(+), 8 deletions(-)
diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index 750e250..71fc890 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -62,6 +62,13 @@ extern int addrconf_set_dstaddr(void _
extern int ipv6_chk_addr(struct in6_addr *addr,
struct net_device *dev,
int strict);
+/* XXX: this is a placeholder till addrconf supports */
+#ifdef CONFIG_IPV6_MIP6
+static inline int ipv6_chk_home_addr(struct in6_addr *addr)
+{
+ return 0;
+}
+#endif
extern struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr,
struct net_device *dev,
int strict);
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index a18d425..138cb12 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -43,6 +43,9 @@ #include <net/rawv6.h>
#include <net/ndisc.h>
#include <net/ip6_route.h>
#include <net/addrconf.h>
+#ifdef CONFIG_IPV6_MIP6
+#include <net/xfrm.h>
+#endif
#include <asm/uaccess.h>
@@ -219,7 +222,7 @@ static int ipv6_rthdr_rcv(struct sk_buff
{
struct sk_buff *skb = *skbp;
struct inet6_skb_parm *opt = IP6CB(skb);
- struct in6_addr *addr;
+ struct in6_addr *addr = NULL;
struct in6_addr daddr;
int n, i;
@@ -244,6 +247,23 @@ static int ipv6_rthdr_rcv(struct sk_buff
looped_back:
if (hdr->segments_left == 0) {
+ switch (hdr->type) {
+#ifdef CONFIG_IPV6_MIP6
+ case IPV6_SRCRT_TYPE_2:
+ /* Silently discard type 2 header unless it was
+ * processed by own
+ */
+ if (!addr) {
+ IP6_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
+ kfree_skb(skb);
+ return -1;
+ }
+ break;
+#endif
+ default:
+ break;
+ }
+
opt->lastopt = skb->h.raw - skb->nh.raw;
opt->srcrt = skb->h.raw - skb->nh.raw;
skb->h.raw += (hdr->hdrlen + 1) << 3;
@@ -253,17 +273,29 @@ looped_back:
return 1;
}
- if (hdr->type != IPV6_SRCRT_TYPE_0) {
+ switch (hdr->type) {
+ case IPV6_SRCRT_TYPE_0:
+ if (hdr->hdrlen & 0x01) {
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+ icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->hdrlen)
- skb->nh.raw);
+ return -1;
+ }
+ break;
+#ifdef CONFIG_IPV6_MIP6
+ case IPV6_SRCRT_TYPE_2:
+ /* Silently discard invalid RTH type 2 */
+ if (hdr->hdrlen != 2 || hdr->segments_left != 1) {
+ IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
+ kfree_skb(skb);
+ return -1;
+ }
+ break;
+#endif
+ default:
IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->type) -
skb->nh.raw);
return -1;
}
-
- if (hdr->hdrlen & 0x01) {
- IP6_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
- icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, (&hdr->hdrlen) -
skb->nh.raw);
- return -1;
- }
/*
* This is the routing header forwarding algorithm from
@@ -303,6 +335,29 @@ looped_back:
addr = rthdr->addr;
addr += i - 1;
+ switch (hdr->type) {
+#ifdef CONFIG_IPV6_MIP6
+ case IPV6_SRCRT_TYPE_2:
+ if (__xfrm6_rcv_one(skb,
+ (xfrm_address_t *)addr,
+ (xfrm_address_t *)&skb->nh.ipv6h->saddr,
+ IPPROTO_ROUTING) < 0) {
+ IP6_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
+ kfree_skb(skb);
+ return -1;
+ }
+
+ if (!ipv6_chk_home_addr(addr)) {
+ IP6_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
+ kfree_skb(skb);
+ return -1;
+ }
+ break;
+#endif
+ default:
+ break;
+ }
+
if (ipv6_addr_is_multicast(addr)) {
IP6_INC_STATS_BH(IPSTATS_MIB_INADDRERRORS);
kfree_skb(skb);
--
1.4.1
-
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