-static u8 *ipv6_build_rthdr(struct sk_buff *skb, u8 *prev_hdr,
- struct ipv6_rt_hdr *opt, struct in6_addr *addr)
-{
- struct rt0_hdr *phdr, *ihdr;
- int hops;
-
- ihdr = (struct rt0_hdr *) opt;
-
- phdr = (struct rt0_hdr *) skb_put(skb, (ihdr->rt_hdr.hdrlen + 1) << 3);
- memcpy(phdr, ihdr, sizeof(struct rt0_hdr));
-
- hops = ihdr->rt_hdr.hdrlen >> 1;
-
- if (hops > 1)
- memcpy(phdr->addr, ihdr->addr + 1,
- (hops - 1) * sizeof(struct in6_addr));
-
- ipv6_addr_copy(phdr->addr + (hops - 1), addr);
-
- phdr->rt_hdr.nexthdr = *prev_hdr;
- *prev_hdr = NEXTHDR_ROUTING;
- return &phdr->rt_hdr.nexthdr;
-}
-
-static u8 *ipv6_build_exthdr(struct sk_buff *skb, u8 *prev_hdr, u8 type, struct ipv6_opt_hdr *opt)
-{
- struct ipv6_opt_hdr *h = (struct ipv6_opt_hdr *)skb_put(skb, ipv6_optlen(opt));
-
- memcpy(h, opt, ipv6_optlen(opt));
- h->nexthdr = *prev_hdr;
- *prev_hdr = type;
- return &h->nexthdr;
-}
-
-u8 *ipv6_build_nfrag_opts(struct sk_buff *skb, u8 *prev_hdr, struct ipv6_txoptions *opt,
- struct in6_addr *daddr, u32 jumbolen)
-{
- struct ipv6_opt_hdr *h = (struct ipv6_opt_hdr *)skb->data;
-
- if (opt && opt->hopopt)
- prev_hdr = ipv6_build_exthdr(skb, prev_hdr, NEXTHDR_HOP, opt->hopopt);
-
- if (jumbolen) {
- u8 *jumboopt = (u8 *)skb_put(skb, 8);
-
- if (opt && opt->hopopt) {
- *jumboopt++ = IPV6_TLV_PADN;
- *jumboopt++ = 0;
- h->hdrlen++;
- } else {
- h = (struct ipv6_opt_hdr *)jumboopt;
- h->nexthdr = *prev_hdr;
- h->hdrlen = 0;
- jumboopt += 2;
- *prev_hdr = NEXTHDR_HOP;
- prev_hdr = &h->nexthdr;
- }
- jumboopt[0] = IPV6_TLV_JUMBO;
- jumboopt[1] = 4;
- *(u32*)(jumboopt+2) = htonl(jumbolen);
- }
- if (opt) {
- if (opt->dst0opt)
- prev_hdr = ipv6_build_exthdr(skb, prev_hdr, NEXTHDR_DEST, opt->dst0opt);
- if (opt->srcrt)
- prev_hdr = ipv6_build_rthdr(skb, prev_hdr, opt->srcrt, daddr);
- }
- return prev_hdr;
-}
-
-u8 *ipv6_build_frag_opts(struct sk_buff *skb, u8 *prev_hdr, struct ipv6_txoptions *opt)
-{
- if (opt->dst1opt)
- prev_hdr = ipv6_build_exthdr(skb, prev_hdr, NEXTHDR_DEST, opt->dst1opt);
- return prev_hdr;
-}
-