- while (ip6t_ext_hdr(nexthdr)) {
- struct ipv6_opt_hdr _hdr, *hp;
-
- DEBUGP("ipv6_opts header iteration \n");
-
- /* Is there enough space for the next ext header? */
- if (len < (int)sizeof(struct ipv6_opt_hdr))
- return 0;
- /* No more exthdr -> evaluate */
- if (nexthdr == NEXTHDR_NONE) {
- break;
- }
- /* ESP -> evaluate */
- if (nexthdr == NEXTHDR_ESP) {
- break;
- }
-
- hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr);
- BUG_ON(hp == NULL);
-
- /* Calculate the header length */
- if (nexthdr == NEXTHDR_FRAGMENT) {
- hdrlen = 8;
- } else if (nexthdr == NEXTHDR_AUTH)
- hdrlen = (hp->hdrlen+2)<<2;
- else
- hdrlen = ipv6_optlen(hp);
-
- /* OPTS -> evaluate */
-#if HOPBYHOP
- if (nexthdr == NEXTHDR_HOP) {
- temp |= MASK_HOPOPTS;
-#else
- if (nexthdr == NEXTHDR_DEST) {
- temp |= MASK_DSTOPTS;
-#endif
- break;
- }
-
-
- /* set the flag */
- switch (nexthdr){
- case NEXTHDR_HOP:
- case NEXTHDR_ROUTING:
- case NEXTHDR_FRAGMENT:
- case NEXTHDR_AUTH:
- case NEXTHDR_DEST:
- break;
- default:
- DEBUGP("ipv6_opts match: unknown nextheader %u\n",nexthdr);
- return 0;
- break;
- }
-
- nexthdr = hp->nexthdr;
- len -= hdrlen;
- ptr += hdrlen;
- if ( ptr > skb->len ) {
- DEBUGP("ipv6_opts: new pointer is too large! \n");
- break;
- }
- }
-
- /* OPTIONS header not found */