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Lines Matching defs:mss

1654  * Compute the MSS to advertise to the peer.  Called only during
1662  * header size from MSS advertisement.  MSS option must hold the maximum
1670 	u_long mss = 0;
1675 	 * we advertise the max MTU of all attached networks as our MSS,
1685 	 * MSS, as the loopback MTU is never included in in_maxmtu.
1694 			mss = ifp->if_mtu;
1704 			mss = uimax(in_maxmtu, mss);
1722 	if (mss > hdrsiz)
1723 		mss -= hdrsiz;
1725 	mss = uimax(tcp_mssdflt, mss);
1726 	return (mss);
1730  * Set connection variables based on the peer's advertised MSS.
1736  * NOTE: Our advertised MSS value must be initialized in the TCPCB
1747 	int mss;
1760 	 * As per RFC1122, use the default MSS value, unless they
1763 	mss = tcp_mssdflt;
1765 		mss = offer;
1766 	mss = uimax(mss, 256);		/* sanity */
1767 	tp->t_peermss = mss;
1768 	mss -= tcp_optlen(tp);
1770 		mss -= ip_optlen(tp->t_inpcb);
1773 		mss -= ip6_optlen(tp->t_inpcb);
1776 	 * XXX XXX What if mss goes negative or zero? This can happen if a
1782 	 * Make the socket buffer an integral number of MSS units.  If
1783 	 * the MSS is larger than the socket buffer, artificially decrease
1784 	 * the MSS.
1795 	if (bufsize < mss)
1796 		mss = bufsize;
1798 		bufsize = roundup(bufsize, mss);
1803 	tp->t_segsz = mss;
1811 		 * than 2 * MSS.
1813 		tp->snd_ssthresh = uimax(2 * mss, rt->rt_rmx.rmx_ssthresh);