bsd/netinet/tcp_input.c

570 	/* Allocate a new queue entry. If we can't, just drop the pkt. XXX */
590 	 * our data already.  If so, drop the data from the incoming
591 	 * segment.  If it provides all of our data, drop us.
1382 	 * If the drop_synfin option is enabled, drop all packets with
1641 		goto drop;
1651 		goto drop;
1656 		goto drop;
1694 			 * If it does not contain a SYN then it is not interesting; drop it.
1695 			 * If it is from this socket, drop it, it must be forged.
1703 					goto drop;
1714 				goto drop;
1722 						goto drop;
1726 						goto drop;
1737 				goto drop;
1742 					goto drop;
1749 				goto drop;
1840 					goto drop;
1855 			 * ``drop'' and ``dropwithreset'' check the
1861 			 * have to drop the temporary socket.
1915 				goto drop;
1965 			/* now drop the reference on the listener */
2029 					goto drop;
2429 			m_adj(m, drop_hdrlen);	/* delayed header drop */
2506 				goto drop;
2519 				goto drop;
2529 				goto drop;
2541 				goto drop;
2619 	 *	if seg contains an ACK, but not for our SYN, drop the input.
2620 	 *	if seg contains a RST, then drop the connection.
2621 	 *	if seg does not contain SYN, then drop it.
2648 			goto drop;
2651 			goto drop;
2797 	 * drop leading data (and SYN); if nothing left, just ack.
2868 					goto drop;
2900 		goto drop;
2905 	 * and it's less than ts_recent, drop it.
2936 			goto drop;
2975 			 * of sequence; drop it.
2980 			 * Send an ACK to resynchronize and drop any data.
3002 		drop_hdrlen += todrop;	/* drop from the top afterwards */
3030 	 * If segment ends after window, drop trailing data
3040 			 * while in TIME_WAIT, drop the old connection
3054 			 * window edge, and have to drop data and PUSH from
3056 			 * remember to ack.  Otherwise, drop segment
3099 	 * error and we send an RST and drop the connection.
3115 	 * later processing; else drop segment and return.
3124 			goto drop;
3183 	 * In ESTABLISHED state: drop duplicate ACKs; ACK out of range
3186 	 * then advance tp->snd_una to th->th_ack and drop
3260 					goto drop;
3308 						goto drop;
3320 					goto drop;
3582 				goto drop;
3671 				drop_hdrlen);	/* hdr drop is delayed */
3697 		/* Just drop the packet that we are processing and return */
3698 		goto drop;
3713 		m_adj(m, drop_hdrlen);	/* delayed header drop */
3938 		goto drop;
3943 			goto drop;
3950 		goto drop;
3958 		goto drop;
3989 drop:
4259 	 * statistical, we have to test that we don't drop below
4666  * requests.  In this case, the protocol specific code should drop
4731 				 * Only drop the inp_wntcnt reference.