-/**
- * skip_exthdr - skip any IPv6 extension headers
- * @skb: skbuff to parse
- * @start: offset of first extension header
- * @nexthdrp: Initially, points to the type of the extension header at @start.
- * This function updates it to point to the extension header at the final
- * offset.
- * @frag: Points to the @frag member in a &struct sw_flow_key. This
- * function sets an appropriate %OVS_FRAG_TYPE_* value.
- *
- * This is based on ipv6_skip_exthdr() but adds the updates to *@frag.
- *
- * When there is more than one fragment header, this version reports whether
- * the final fragment header that it examines is a first fragment.
- *
- * Returns the final payload offset, or -1 on error.
- */
-static int skip_exthdr(const struct sk_buff *skb, int start, u8 *nexthdrp,
- u8 *frag)
-{
- u8 nexthdr = *nexthdrp;
-
- while (ipv6_ext_hdr(nexthdr)) {
- struct ipv6_opt_hdr _hdr, *hp;
- int hdrlen;
-
- if (nexthdr == NEXTHDR_NONE)
- return -1;
- hp = skb_header_pointer(skb, start, sizeof(_hdr), &_hdr);
- if (hp == NULL)
- return -1;
- if (nexthdr == NEXTHDR_FRAGMENT) {
- __be16 _frag_off, *fp;
- fp = skb_header_pointer(skb,
- start+offsetof(struct frag_hdr,
- frag_off),
- sizeof(_frag_off),
- &_frag_off);
- if (fp == NULL)
- return -1;
-
- if (ntohs(*fp) & ~0x7) {
- *frag = OVS_FRAG_TYPE_LATER;
- break;
- }
- *frag = OVS_FRAG_TYPE_FIRST;
- hdrlen = 8;
- } else if (nexthdr == NEXTHDR_AUTH)
- hdrlen = (hp->hdrlen+2)<<2;
- else
- hdrlen = ipv6_optlen(hp);
-
- nexthdr = hp->nexthdr;
- start += hdrlen;
- }
-
- *nexthdrp = nexthdr;
- return start;
-}
-