2819  *  - verify, by checking the Cumulative TSN Ack field of the chunk,
2878 	/* If Cumulative TSN Ack beyond the max tsn currently  in sctp_sf_do_9_2_shutdown()
2914 	/*  - verify, by checking the Cumulative TSN Ack field of the  in sctp_sf_do_9_2_shutdown()
2930  * The Cumulative TSN Ack of the received SHUTDOWN chunk
2963 	/* If Cumulative TSN Ack beyond the max tsn currently  in sctp_sf_do_9_2_shut_ctsn()
2970 	/* verify, by checking the Cumulative TSN Ack field of the  in sctp_sf_do_9_2_shut_ctsn()
3056  * This chunk contains one data element, i.e. the TSN number that
3058  * TSN number in the datagram that was originally marked with the
3114  * contains one data element, i.e. the lowest TSN associated with the IP
3269 	 * and the peer's RTO has expired.  The duplicate TSN number(s)  in sctp_sf_eat_data_6_2()
3351 		 * TSN has not been updated yet.  in sctp_sf_eat_data_fast_4_4()
3366  *     i) If Cumulative TSN Ack is less than the Cumulative TSN Ack Point,
3367  *     then drop the SACK.   Since Cumulative TSN Ack is monotonically
3368  *     increasing, a SACK whose Cumulative TSN Ack is less than the
3369  *     Cumulative TSN Ack Point indicates an out-of-order SACK.
3372  *     of bytes still outstanding after processing the Cumulative TSN Ack
3375  *     iii) If the SACK is missing a TSN that was previously
3421 	/* If Cumulative TSN Ack beyond the max tsn currently  in sctp_sf_eat_sack_6_2()
3430 	/* i) If Cumulative TSN Ack is less than the Cumulative TSN  in sctp_sf_eat_sack_6_2()
3431 	 *     Ack Point, then drop the SACK.  Since Cumulative TSN  in sctp_sf_eat_sack_6_2()
3433 	 *     Cumulative TSN Ack is less than the Cumulative TSN Ack  in sctp_sf_eat_sack_6_2()
4183  * When a FORWARD TSN chunk arrives, the data receiver MUST first update
4184  * its cumulative TSN point to the value carried in the FORWARD TSN
4185  * chunk, and then MUST further advance its cumulative TSN point locally
4188  * missing TSNs earlier than or equal to the new cumulative TSN point.
4204 	__u32 tsn;  in sctp_sf_eat_fwd_tsn()  local
4226 	tsn = ntohl(fwdtsn_hdr->new_cum_tsn);  in sctp_sf_eat_fwd_tsn()
4227 	pr_debug("%s: TSN 0x%x\n", __func__, tsn);  in sctp_sf_eat_fwd_tsn()
4229 	/* The TSN is too high--silently discard the chunk and count on it  in sctp_sf_eat_fwd_tsn()
4232 	if (sctp_tsnmap_check(&asoc->peer.tsn_map, tsn) < 0)  in sctp_sf_eat_fwd_tsn()
4238 	sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_FWDTSN, SCTP_U32(tsn));  in sctp_sf_eat_fwd_tsn()
4271 	__u32 tsn;  in sctp_sf_eat_fwd_tsn_fast()  local
4293 	tsn = ntohl(fwdtsn_hdr->new_cum_tsn);  in sctp_sf_eat_fwd_tsn_fast()
4294 	pr_debug("%s: TSN 0x%x\n", __func__, tsn);  in sctp_sf_eat_fwd_tsn_fast()
4296 	/* The TSN is too high--silently discard the chunk and count on it  in sctp_sf_eat_fwd_tsn_fast()
4299 	if (sctp_tsnmap_check(&asoc->peer.tsn_map, tsn) < 0)  in sctp_sf_eat_fwd_tsn_fast()
4305 	sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_FWDTSN, SCTP_U32(tsn));  in sctp_sf_eat_fwd_tsn_fast()
4867  * cumulative tsn ack to a point beyond the max tsn currently sent.
4880 	static const char err_str[] = "The cumulative tsn ack beyond the max tsn currently sent:";  in sctp_sf_violation_ctsn()
5601  * TSN Ack field the last sequential TSN it has received from the peer.
5604  * with the updated last sequential TSN received from its peer.
5620 	 * in the Cumulative TSN Ack field the last sequential TSN it  in sctp_sf_do_9_2_start_shutdown()
5828 	/* E3) Determine how many of the earliest (i.e., lowest TSN)  in sctp_sf_do_6_3_3_rtx()
6003  * with the updated last sequential TSN received from its peer.
6488 	__u32 tsn;  in sctp_eat_data()  local
6495 	tsn = ntohl(data_hdr->tsn);  in sctp_eat_data()
6496 	pr_debug("%s: TSN 0x%x\n", __func__, tsn);  in sctp_eat_data()
6517 					SCTP_U32(tsn));  in sctp_eat_data()
6521 	tmp = sctp_tsnmap_check(&asoc->peer.tsn_map, tsn);  in sctp_eat_data()
6523 		/* The TSN is too high--silently discard the chunk and  in sctp_eat_data()
6531 		sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_DUP, SCTP_U32(tsn));  in sctp_eat_data()
6535 	/* This is a new TSN.  */  in sctp_eat_data()
6562 		/* If this is the next TSN, consider reneging to make  in sctp_eat_data()
6569 		    (sctp_tsnmap_get_ctsn(map) + 1) == tsn) {  in sctp_eat_data()
6570 			pr_debug("%s: reneging for tsn:%u\n", __func__, tsn);  in sctp_eat_data()
6573 			pr_debug("%s: discard tsn:%u len:%zu, rwnd:%d\n",  in sctp_eat_data()
6574 				 __func__, tsn, datalen, asoc->rwnd);  in sctp_eat_data()
6589 		    (sctp_tsnmap_get_ctsn(map) + 1) == tsn) {  in sctp_eat_data()
6590 			pr_debug("%s: under pressure, reneging for tsn:%u\n",  in sctp_eat_data()
6591 				 __func__, tsn);  in sctp_eat_data()
6605 		err = sctp_make_abort_no_data(asoc, chunk, tsn);  in sctp_eat_data()
6647 		/* Mark tsn as received even though we drop it */  in sctp_eat_data()
6648 		sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_TSN, SCTP_U32(tsn));  in sctp_eat_data()
6660 	/* Check to see if the SSN is possible for this TSN.  in sctp_eat_data()
6663 	 * wrap and for a valid TSN.  We can simply check if the current  in sctp_eat_data()