net/dccp/feat.h

1 /* SPDX-License-Identifier: GPL-2.0-only */
17 /* Ack Ratio takes 2-byte integer values (11.3) */
19 /* Wmin=32 and Wmax=2^46-1 from 7.5.2 */
23 #define DCCP_FEAT_MAX_SP_VALS	(DCCP_SINGLE_OPT_MAXLEN - 2)
26 	FEAT_AT_RX   = 1,	/* located at RX side of half-connection  */
27 	FEAT_AT_TX   = 2,	/* located at TX side of half-connection  */
28 	FEAT_SP      = 4,	/* server-priority reconciliation (6.3.1) */
29 	FEAT_NN	     = 8,	/* non-negotiable reconciliation (6.3.2)  */
42  * dccp_feat_val  -  Container for SP or NN feature values
45  * @sp.len: length of @sp.vec in bytes
56  * struct feat_entry  -  Data structure to perform feature negotiation
63  * @is_local: feature location (1) or feature-remote (0)
81 	if (entry->needs_confirm)  in dccp_feat_genopt()
82 		return entry->is_local ? DCCPO_CONFIRM_L : DCCPO_CONFIRM_R;  in dccp_feat_genopt()
83 	return entry->is_local ? DCCPO_CHANGE_L : DCCPO_CHANGE_R;  in dccp_feat_genopt()
87  * struct ccid_dependency  -  Track changes resulting from choosing a CCID
90  * @is_mandatory: whether presence of @dependent_feat is mission-critical or not
115  * Encoding variable-length options and their maximum length.
117  * This affects NN options (SP options are all u8) and other variable-length