lib/tcp/tcp.c

672 	win_size = (tcp->tcp_swnd > tcp->tcp_cwnd) ? tcp->tcp_cwnd :
2176  * 1) Various stuffs, tcp_mss, tcp_cwnd, ... need to be adjusted when the
2216 	tcp->tcp_cwnd = MIN(tcp_slow_start_initial * mss,
2543 		 * All holes are filled.  Manipulate tcp_cwnd to send more
2544 		 * if we can.  Note that after the SACK recovery, tcp_cwnd is
2550 				tcp->tcp_cwnd = tcp->tcp_snxt - tcp->tcp_suna;
2551 				assert(tcp->tcp_cwnd > 0);
2555 				tcp->tcp_cwnd = tcp->tcp_snxt - tcp->tcp_suna +
2881 				 * Set tcp_cwnd back to 1 MSS, per
2886 				tcp->tcp_cwnd = tcp->tcp_mss;
3402 			tcp->tcp_cwnd = mss;
3431 	 * set, reduce tcp_cwnd and tcp_ssthresh.  But this should only be
3438 			npkt = (MIN(tcp->tcp_cwnd, tcp->tcp_swnd) >> 1) / mss;
3440 			tcp->tcp_cwnd = npkt * mss;
3449 				 * back, we will increase tcp_cwnd by 1 MSS.
3488 					 * increase tcp_cwnd so that new
3498 					 * Note how tcp_cwnd is incremented.
3509 						tcp->tcp_cwnd += mss <<
3531 					npkt = (MIN(tcp->tcp_cwnd,
3536 					tcp->tcp_cwnd = (npkt +
3627 					cwnd = tcp->tcp_cwnd + mss;
3630 					tcp->tcp_cwnd = cwnd;
3720 			if (tcp->tcp_cwnd > tcp->tcp_cwnd_ssthresh) {
3721 				tcp->tcp_cwnd = tcp->tcp_cwnd_ssthresh;
3748 				 * need to scale back tcp_cwnd to the
3754 				tcp->tcp_cwnd = tcp->tcp_cwnd_ssthresh +
3756 				tcp->tcp_cwnd_cnt = tcp->tcp_cwnd;
3814 	 * congestion experience bit is not set, increase the tcp_cwnd as
3818 		cwnd = tcp->tcp_cwnd;
3824 			 * tcp_cwnd.  With partial increase, tcp_wput_data()
3828 			 * By initializing tcp_cwnd_cnt to new tcp_cwnd and
3829 			 * decrementing it by 1 MSS for every ACKs, tcp_cwnd is
3839 		tcp->tcp_cwnd = MIN(cwnd + add, tcp->tcp_cwnd_max);
4179 		 * Adjust tcp_cwnd back to normal value after sending
4183 			tcp->tcp_cwnd -= mss << (tcp->tcp_dupack_cnt - 1);
4232 		win = MIN(tcp->tcp_cwnd, tcp->tcp_swnd);
4371 					    tcp->tcp_cwnd),
4379 				tcp->tcp_cwnd = tcp->tcp_mss;
4403 			if (tcp->tcp_cwnd == 0) {
4405 				 * Set tcp_cwnd to 1 MSS so that a
4411 				tcp->tcp_cwnd = tcp->tcp_mss;
4726 		tcp->tcp_cwnd = MIN(tcp_slow_start_after_idle * mss,
4748 		if (tcp->tcp_cwnd == 0) {
4750 			 * Note that tcp_cwnd is 0 before 3-way handshake is
4759 		if (usable_r > tcp->tcp_cwnd)
4760 			usable_r = tcp->tcp_cwnd;