net/ipv6/exthdrs.c

234 	struct inet6_skb_parm *opt = IP6CB(skb);
239 	if (opt->dsthao) {
243 	opt->dsthao = opt->dst1;
244 	opt->dst1 = 0;
298 	struct inet6_skb_parm *opt = IP6CB(skb);
320 	opt->lastopt = opt->dst1 = skb_network_header_len(skb);
322 	dstbuf = opt->dst1;
327 		opt = IP6CB(skb);
329 		opt->nhoff = dstbuf;
331 		opt->nhoff = opt->dst1;
371 	struct inet6_skb_parm *opt = IP6CB(skb);
419 		opt->srcrt = skb_network_header_len(skb);
420 		opt->lastopt = opt->srcrt;
422 		opt->nhoff = (&hdr->nexthdr) - skb_network_header(skb);
485 	struct inet6_skb_parm *opt = IP6CB(skb);
529 		opt->srcrt = skb_network_header_len(skb);
530 		opt->lastopt = opt->srcrt;
532 		opt->nhoff = (&hdr->nexthdr) - skb_network_header(skb);
651 	struct inet6_skb_parm *opt = IP6CB(skb);
713 		opt->lastopt = opt->srcrt = skb_network_header_len(skb);
715 		opt->dst0 = opt->dst1;
716 		opt->dst1 = 0;
717 		opt->nhoff = (&hdr->nexthdr) - skb_network_header(skb);
977 		net_dbg_ratelimited("ipv6_hop_jumbo: wrong jumbo opt length/alignment %d\n",
1035 	struct inet6_skb_parm *opt = IP6CB(skb);
1057 	opt->flags |= IP6SKB_HOPBYHOP;
1060 		opt = IP6CB(skb);
1061 		opt->nhoff = sizeof(struct ipv6hdr);
1078 			     struct ipv6_rt_hdr *opt,
1084 	ihdr = (struct rt0_hdr *) opt;
1103 			     struct ipv6_rt_hdr *opt,
1109 	sr_ihdr = (struct ipv6_sr_hdr *)opt;
1152 			    struct ipv6_rt_hdr *opt,
1155 	switch (opt->type) {
1159 		ipv6_push_rthdr0(skb, proto, opt, addr_p, saddr);
1162 		ipv6_push_rthdr4(skb, proto, opt, addr_p, saddr);
1169 static void ipv6_push_exthdr(struct sk_buff *skb, u8 *proto, u8 type, struct ipv6_opt_hdr *opt)
1171 	struct ipv6_opt_hdr *h = skb_push(skb, ipv6_optlen(opt));
1173 	memcpy(h, opt, ipv6_optlen(opt));
1178 void ipv6_push_nfrag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt,
1182 	if (opt->srcrt) {
1183 		ipv6_push_rthdr(skb, proto, opt->srcrt, daddr, saddr);
1188 		if (opt->dst0opt)
1189 			ipv6_push_exthdr(skb, proto, NEXTHDR_DEST, opt->dst0opt);
1191 	if (opt->hopopt)
1192 		ipv6_push_exthdr(skb, proto, NEXTHDR_HOP, opt->hopopt);
1195 void ipv6_push_frag_opts(struct sk_buff *skb, struct ipv6_txoptions *opt, u8 *proto)
1197 	if (opt->dst1opt)
1198 		ipv6_push_exthdr(skb, proto, NEXTHDR_DEST, opt->dst1opt);
1203 ipv6_dup_options(struct sock *sk, struct ipv6_txoptions *opt)
1207 	opt2 = sock_kmalloc(sk, opt->tot_len, GFP_ATOMIC);
1209 		long dif = (char *)opt2 - (char *)opt;
1210 		memcpy(opt2, opt, opt->tot_len);
1246  * @opt: original options
1247  * @newtype: option type to replace in @opt
1250  * Returns a new set of options which is a copy of @opt with the
1253  * @opt may be NULL, in which case a new set of options is returned
1263 ipv6_renew_options(struct sock *sk, struct ipv6_txoptions *opt,
1270 	if (opt) {
1271 		if (newtype != IPV6_HOPOPTS && opt->hopopt)
1272 			tot_len += CMSG_ALIGN(ipv6_optlen(opt->hopopt));
1273 		if (newtype != IPV6_RTHDRDSTOPTS && opt->dst0opt)
1274 			tot_len += CMSG_ALIGN(ipv6_optlen(opt->dst0opt));
1275 		if (newtype != IPV6_RTHDR && opt->srcrt)
1276 			tot_len += CMSG_ALIGN(ipv6_optlen(opt->srcrt));
1277 		if (newtype != IPV6_DSTOPTS && opt->dst1opt)
1278 			tot_len += CMSG_ALIGN(ipv6_optlen(opt->dst1opt));
1298 			  (opt ? opt->hopopt : NULL),
1301 			  (opt ? opt->dst0opt : NULL),
1305 			  (opt ? (struct ipv6_opt_hdr *)opt->srcrt : NULL),
1308 			  (opt ? opt->dst1opt : NULL),
1320 					    struct ipv6_txoptions *opt)
1326 	if (opt->dst0opt && !opt->srcrt) {
1327 		if (opt_space != opt) {
1328 			memcpy(opt_space, opt, sizeof(*opt_space));
1329 			opt = opt_space;
1331 		opt->opt_nflen -= ipv6_optlen(opt->dst0opt);
1332 		opt->dst0opt = NULL;
1335 	return opt;
1344  * @opt: struct ipv6_txoptions in which to look for srcrt opt
1351 				const struct ipv6_txoptions *opt,
1354 	if (!opt || !opt->srcrt)
1359 	switch (opt->srcrt->type) {
1363 		fl6->daddr = *((struct rt0_hdr *)opt->srcrt)->addr;
1367 		struct ipv6_sr_hdr *srh = (struct ipv6_sr_hdr *)opt->srcrt;