lib/tcp/tcp.c

171 /* Round up the value to the nearest mss. */
225  * ASSUMED to be rounded up to the nearest MSS before the calculation.
226  * We cannot find the scale value and then do a round up of tcp_rwnd
595 		/* The other side has closed the connection, report this up. */
694 /* Free up all TCP related stuff */
1291 		 * instead.  The kernel usually ends up
1346 	 * large, and round up to the nearest
1349 	 * We do the round up here because
1352 	 * round up.
1456 			 * Free up the acceptor template and allocate one
1537 	 * window size changed via SO_RCVBUF option.  First round up the
1980 		/* MSS may have changed, do a round up again. */
2026 	uchar_t		*up = (uchar_t *)tcph;
2032 	endp = up + TCP_HDR_LENGTH(tcph);
2033 	up += TCP_MIN_HEADER_LENGTH;
2034 	while (up < endp) {
2035 		len = endp - up;
2036 		switch (*up) {
2041 			up++;
2046 			    up[1] != TCPOPT_MAXSEG_LEN)
2049 			mss = BE16_TO_U16(up+2);
2054 			up += TCPOPT_MAXSEG_LEN;
2058 			if (len < TCPOPT_WS_LEN || up[1] != TCPOPT_WS_LEN)
2061 			if (up[2] > TCP_MAX_WINSHIFT)
2064 				tcpopt->tcp_opt_wscale = up[2];
2067 			up += TCPOPT_WS_LEN;
2072 			    up[1] != TCPOPT_SACK_OK_LEN)
2075 			up += TCPOPT_SACK_OK_LEN;
2079 			if (len <= 2 || up[1] <= 2 || len < up[1])
2084 				up += up[1];
2087 			sack_len = up[1] - TCPOPT_HEADER_LEN;
2088 			up += TCPOPT_HEADER_LEN;
2107 					up += sack_len;
2114 				if (up + 8 > endp) {
2115 					up = endp;
2118 				sack_begin = BE32_TO_U32(up);
2119 				up += 4;
2120 				sack_end = BE32_TO_U32(up);
2121 				up += 4;
2148 			    up[1] != TCPOPT_TSTAMP_LEN)
2151 			tcpopt->tcp_opt_ts_val = BE32_TO_U32(up+2);
2152 			tcpopt->tcp_opt_ts_ecr = BE32_TO_U32(up+6);
2156 			up += TCPOPT_TSTAMP_LEN;
2160 			if (len <= 1 || len < (int)up[1] || up[1] == 0)
2162 			up += up[1];
2224  * This function sets up the correct tcp_mss value according to the
2225  * MSS option value and our header size.  It also sets up the window scale
2349 	 * by tcp_adapt_ire().  tcp_mss_set() will also set up the
2368 	uint8_t *up;
2378 	    OK_32PTR((up = ((uint8_t *)tcph) +
2380 	    *(uint32_t *)up == TCPOPT_NOP_NOP_TSTAMP) {
2381 		tcpoptp->tcp_opt_ts_val = ABE32_TO_U32((up+4));
2382 		tcpoptp->tcp_opt_ts_ecr = ABE32_TO_U32((up+8));
3547 				 * paper "Improving the Start-up Behavior
4002 				 * the FIN to arrive.  If it doesn't show up,
5662 		/* Set up the TCP flag field. */
5714  * non-NULL, then up to max_to_send bytes of data will be dup'ed off that
5926 				 * Set up all the bits to tell other side
6149 	 * IP will not pass up a packet with a broadcast dest address
6735  * Send up all messages queued on tcp_rcv_list.