net/ipv4/tcp_output.c

461 				struct tcp_out_options *opts)
464 	if (unlikely(OPTION_MPTCP & opts->options))
465 		mptcp_write_options(th, ptr, tp, &opts->mptcp);
487 				  struct tcp_out_options *opts,
539 	opts->bpf_opt_len = *remaining - sock_ops.remaining_opt_len;
541 	opts->bpf_opt_len = (opts->bpf_opt_len + 3) & ~3;
543 	*remaining -= opts->bpf_opt_len;
550 				    struct tcp_out_options *opts)
552 	u8 first_opt_off, nr_written, max_opt_len = opts->bpf_opt_len;
594 				  struct tcp_out_options *opts,
603 				    struct tcp_out_options *opts)
610 				      struct tcp_out_options *opts,
636 	opts->hash_location = (__u8 *)ptr;
661 			      struct tcp_out_options *opts,
665 	u16 options = opts->options;	/* mungable copy */
671 		opts->hash_location = (__u8 *)ptr;
674 		ptr = process_tcp_ao_options(tp, tcprsk, opts, key, ptr);
676 	if (unlikely(opts->mss)) {
679 			       opts->mss);
695 		*ptr++ = htonl(opts->tsval);
696 		*ptr++ = htonl(opts->tsecr);
710 			       opts->ws);
713 	if (unlikely(opts->num_sack_blocks)) {
721 			       (TCPOLEN_SACK_BASE + (opts->num_sack_blocks *
724 		for (this_sack = 0; this_sack < opts->num_sack_blocks;
734 		struct tcp_fastopen_cookie *foc = opts->fastopen_cookie;
759 	mptcp_options_write(th, ptr, tp, opts);
763 			   struct tcp_out_options *opts,
770 				opts->options |= OPTION_SMC;
780 				struct tcp_out_options *opts,
787 				opts->options |= OPTION_SMC;
796 				  struct tcp_out_options *opts,
802 		if (mptcp_synack_options(req, &size, &opts->mptcp)) {
804 				opts->options |= OPTION_MPTCP;
815 				struct tcp_out_options *opts,
826 		opts->options |= OPTION_MD5;
831 			opts->options |= OPTION_AO;
845 	opts->mss = tcp_advertise_mss(sk);
849 		opts->options |= OPTION_TS;
850 		opts->tsval = tcp_skb_timestamp_ts(tp->tcp_usec_ts, skb) + tp->tsoffset;
851 		opts->tsecr = tp->rx_opt.ts_recent;
855 		opts->ws = tp->rx_opt.rcv_wscale;
856 		opts->options |= OPTION_WSCALE;
860 		opts->options |= OPTION_SACK_ADVERTISE;
861 		if (unlikely(!(OPTION_TS & opts->options)))
872 			opts->options |= OPTION_FAST_OPEN_COOKIE;
873 			opts->fastopen_cookie = &fastopen->cookie;
880 	smc_set_option(tp, opts, &remaining);
885 		if (mptcp_syn_options(sk, skb, &size, &opts->mptcp)) {
886 			opts->options |= OPTION_MPTCP;
891 	bpf_skops_hdr_opt_len(sk, skb, NULL, NULL, 0, opts, &remaining);
900 				       struct tcp_out_options *opts,
910 		opts->options |= OPTION_MD5;
921 		opts->options |= OPTION_AO;
927 	opts->mss = mss;
931 		opts->ws = ireq->rcv_wscale;
932 		opts->options |= OPTION_WSCALE;
936 		opts->options |= OPTION_TS;
937 		opts->tsval = tcp_skb_timestamp_ts(tcp_rsk(req)->req_usec_ts, skb) +
939 		opts->tsecr = READ_ONCE(req->ts_recent);
943 		opts->options |= OPTION_SACK_ADVERTISE;
954 			opts->options |= OPTION_FAST_OPEN_COOKIE;
955 			opts->fastopen_cookie = foc;
960 	mptcp_set_option_cond(req, opts, &remaining);
962 	smc_set_option_cond(tcp_sk(sk), ireq, opts, &remaining);
965 			      synack_type, opts, &remaining);
974 					struct tcp_out_options *opts,
981 	opts->options = 0;
985 		opts->options |= OPTION_MD5;
988 		opts->options |= OPTION_AO;
993 		opts->options |= OPTION_TS;
994 		opts->tsval = skb ? tcp_skb_timestamp_ts(tp->tcp_usec_ts, skb) +
996 		opts->tsecr = tp->rx_opt.ts_recent;
1011 					      &opts->mptcp)) {
1012 			opts->options |= OPTION_MPTCP;
1024 		opts->num_sack_blocks =
1030 			opts->num_sack_blocks * TCPOLEN_SACK_PERBLOCK;
1037 		bpf_skops_hdr_opt_len(sk, skb, NULL, NULL, 0, opts, &remaining);
1292 	struct tcp_out_options opts;
1325 	memset(&opts, 0, sizeof(opts));
1329 		tcp_options_size = tcp_syn_options(sk, skb, &opts, &key);
1331 		tcp_options_size = tcp_established_options(sk, skb, &opts, &key);
1412 	tcp_options_write(th, tp, NULL, &opts, &key);
1418 		tp->af_specific->calc_md5_hash(opts.hash_location,
1425 					  opts.hash_location);
1433 	bpf_skops_write_hdr_opt(sk, skb, NULL, NULL, 0, &opts);
1866 	struct tcp_out_options opts;
1877 	header_len = tcp_established_options(sk, NULL, &opts, &key) +
3713 	struct tcp_out_options opts;
3750 	memset(&opts, 0, sizeof(opts));
3800 	tcp_header_size = tcp_synack_options(sk, req, mss, skb, &opts,
3822 	tcp_options_write(th, NULL, tcp_rsk(req), &opts, &key);
3829 		tcp_rsk(req)->af_specific->calc_md5_hash(opts.hash_location,
3834 		tcp_rsk(req)->af_specific->ao_synack_hash(opts.hash_location,
3836 					opts.hash_location - (u8 *)th, 0);
3844 				synack_type, &opts);