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-rw-r--r--include/net/seg6.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/include/net/seg6.h b/include/net/seg6.h
index 9d19c15e8545..af668f17b398 100644
--- a/include/net/seg6.h
+++ b/include/net/seg6.h
@@ -58,9 +58,30 @@ extern int seg6_local_init(void);
extern void seg6_local_exit(void);
extern bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len, bool reduced);
+extern struct ipv6_sr_hdr *seg6_get_srh(struct sk_buff *skb, int flags);
+extern void seg6_icmp_srh(struct sk_buff *skb, struct inet6_skb_parm *opt);
extern int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh,
int proto);
extern int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh);
extern int seg6_lookup_nexthop(struct sk_buff *skb, struct in6_addr *nhaddr,
u32 tbl_id);
+
+/* If the packet which invoked an ICMP error contains an SRH return
+ * the true destination address from within the SRH, otherwise use the
+ * destination address in the IP header.
+ */
+static inline const struct in6_addr *seg6_get_daddr(struct sk_buff *skb,
+ struct inet6_skb_parm *opt)
+{
+ struct ipv6_sr_hdr *srh;
+
+ if (opt->flags & IP6SKB_SEG6) {
+ srh = (struct ipv6_sr_hdr *)(skb->data + opt->srhoff);
+ return &srh->segments[0];
+ }
+
+ return NULL;
+}
+
+
#endif