2828  *  - verify, by checking the Cumulative TSN Ack field of the chunk,
2887 	/* If Cumulative TSN Ack beyond the max tsn currently  in sctp_sf_do_9_2_shutdown()
2923 	/*  - verify, by checking the Cumulative TSN Ack field of the  in sctp_sf_do_9_2_shutdown()
2939  * The Cumulative TSN Ack of the received SHUTDOWN chunk
2972 	/* If Cumulative TSN Ack beyond the max tsn currently  in sctp_sf_do_9_2_shut_ctsn()
2979 	/* verify, by checking the Cumulative TSN Ack field of the  in sctp_sf_do_9_2_shut_ctsn()
3065  * This chunk contains one data element, i.e. the TSN number that
3067  * TSN number in the datagram that was originally marked with the
3123  * contains one data element, i.e. the lowest TSN associated with the IP
3278 	 * and the peer's RTO has expired.  The duplicate TSN number(s)  in sctp_sf_eat_data_6_2()
3360 		 * TSN has not been updated yet.  in sctp_sf_eat_data_fast_4_4()
3375  *     i) If Cumulative TSN Ack is less than the Cumulative TSN Ack Point,
3376  *     then drop the SACK.   Since Cumulative TSN Ack is monotonically
3377  *     increasing, a SACK whose Cumulative TSN Ack is less than the
3378  *     Cumulative TSN Ack Point indicates an out-of-order SACK.
3381  *     of bytes still outstanding after processing the Cumulative TSN Ack
3384  *     iii) If the SACK is missing a TSN that was previously
3430 	/* If Cumulative TSN Ack beyond the max tsn currently  in sctp_sf_eat_sack_6_2()
3439 	/* i) If Cumulative TSN Ack is less than the Cumulative TSN  in sctp_sf_eat_sack_6_2()
3440 	 *     Ack Point, then drop the SACK.  Since Cumulative TSN  in sctp_sf_eat_sack_6_2()
3442 	 *     Cumulative TSN Ack is less than the Cumulative TSN Ack  in sctp_sf_eat_sack_6_2()
4192  * When a FORWARD TSN chunk arrives, the data receiver MUST first update
4193  * its cumulative TSN point to the value carried in the FORWARD TSN
4194  * chunk, and then MUST further advance its cumulative TSN point locally
4197  * missing TSNs earlier than or equal to the new cumulative TSN point.
4213 	__u32 tsn;  in sctp_sf_eat_fwd_tsn()  local
4235 	tsn = ntohl(fwdtsn_hdr->new_cum_tsn);  in sctp_sf_eat_fwd_tsn()
4236 	pr_debug("%s: TSN 0x%x\n", __func__, tsn);  in sctp_sf_eat_fwd_tsn()
4238 	/* The TSN is too high--silently discard the chunk and count on it  in sctp_sf_eat_fwd_tsn()
4241 	if (sctp_tsnmap_check(&asoc->peer.tsn_map, tsn) < 0)  in sctp_sf_eat_fwd_tsn()
4247 	sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_FWDTSN, SCTP_U32(tsn));  in sctp_sf_eat_fwd_tsn()
4280 	__u32 tsn;  in sctp_sf_eat_fwd_tsn_fast()  local
4302 	tsn = ntohl(fwdtsn_hdr->new_cum_tsn);  in sctp_sf_eat_fwd_tsn_fast()
4303 	pr_debug("%s: TSN 0x%x\n", __func__, tsn);  in sctp_sf_eat_fwd_tsn_fast()
4305 	/* The TSN is too high--silently discard the chunk and count on it  in sctp_sf_eat_fwd_tsn_fast()
4308 	if (sctp_tsnmap_check(&asoc->peer.tsn_map, tsn) < 0)  in sctp_sf_eat_fwd_tsn_fast()
4314 	sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_FWDTSN, SCTP_U32(tsn));  in sctp_sf_eat_fwd_tsn_fast()
4876  * cumulative tsn ack to a point beyond the max tsn currently sent.
4889 	static const char err_str[] = "The cumulative tsn ack beyond the max tsn currently sent:";  in sctp_sf_violation_ctsn()
5610  * TSN Ack field the last sequential TSN it has received from the peer.
5613  * with the updated last sequential TSN received from its peer.
5629 	 * in the Cumulative TSN Ack field the last sequential TSN it  in sctp_sf_do_9_2_start_shutdown()
5837 	/* E3) Determine how many of the earliest (i.e., lowest TSN)  in sctp_sf_do_6_3_3_rtx()
6012  * with the updated last sequential TSN received from its peer.
6497 	__u32 tsn;  in sctp_eat_data()  local
6504 	tsn = ntohl(data_hdr->tsn);  in sctp_eat_data()
6505 	pr_debug("%s: TSN 0x%x\n", __func__, tsn);  in sctp_eat_data()
6526 					SCTP_U32(tsn));  in sctp_eat_data()
6530 	tmp = sctp_tsnmap_check(&asoc->peer.tsn_map, tsn);  in sctp_eat_data()
6532 		/* The TSN is too high--silently discard the chunk and  in sctp_eat_data()
6540 		sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_DUP, SCTP_U32(tsn));  in sctp_eat_data()
6544 	/* This is a new TSN.  */  in sctp_eat_data()
6571 		/* If this is the next TSN, consider reneging to make  in sctp_eat_data()
6578 		    (sctp_tsnmap_get_ctsn(map) + 1) == tsn) {  in sctp_eat_data()
6579 			pr_debug("%s: reneging for tsn:%u\n", __func__, tsn);  in sctp_eat_data()
6582 			pr_debug("%s: discard tsn:%u len:%zu, rwnd:%d\n",  in sctp_eat_data()
6583 				 __func__, tsn, datalen, asoc->rwnd);  in sctp_eat_data()
6598 		    (sctp_tsnmap_get_ctsn(map) + 1) == tsn) {  in sctp_eat_data()
6599 			pr_debug("%s: under pressure, reneging for tsn:%u\n",  in sctp_eat_data()
6600 				 __func__, tsn);  in sctp_eat_data()
6614 		err = sctp_make_abort_no_data(asoc, chunk, tsn);  in sctp_eat_data()
6656 		/* Mark tsn as received even though we drop it */  in sctp_eat_data()
6657 		sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_TSN, SCTP_U32(tsn));  in sctp_eat_data()
6669 	/* Check to see if the SSN is possible for this TSN.  in sctp_eat_data()
6672 	 * wrap and for a valid TSN.  We can simply check if the current  in sctp_eat_data()